1// SPDX-License-Identifier: GPL-2.0 2/* Copyright(c) 1999 - 2006 Intel Corporation. */ 3 4/* e1000_hw.c 5 * Shared functions for accessing and configuring the MAC 6 */ 7 8#include <linux/bitfield.h> 9#include "e1000.h" 10 11static s32 e1000_check_downshift(struct e1000_hw *hw); 12static s32 e1000_check_polarity(struct e1000_hw *hw, 13 e1000_rev_polarity *polarity); 14static void e1000_clear_hw_cntrs(struct e1000_hw *hw); 15static void e1000_clear_vfta(struct e1000_hw *hw); 16static s32 e1000_config_dsp_after_link_change(struct e1000_hw *hw, 17 bool link_up); 18static s32 e1000_config_fc_after_link_up(struct e1000_hw *hw); 19static s32 e1000_detect_gig_phy(struct e1000_hw *hw); 20static s32 e1000_get_auto_rd_done(struct e1000_hw *hw); 21static s32 e1000_get_cable_length(struct e1000_hw *hw, u16 *min_length, 22 u16 *max_length); 23static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw); 24static s32 e1000_id_led_init(struct e1000_hw *hw); 25static void e1000_init_rx_addrs(struct e1000_hw *hw); 26static s32 e1000_phy_igp_get_info(struct e1000_hw *hw, 27 struct e1000_phy_info *phy_info); 28static s32 e1000_phy_m88_get_info(struct e1000_hw *hw, 29 struct e1000_phy_info *phy_info); 30static s32 e1000_set_d3_lplu_state(struct e1000_hw *hw, bool active); 31static s32 e1000_wait_autoneg(struct e1000_hw *hw); 32static void e1000_write_reg_io(struct e1000_hw *hw, u32 offset, u32 value); 33static s32 e1000_set_phy_type(struct e1000_hw *hw); 34static void e1000_phy_init_script(struct e1000_hw *hw); 35static s32 e1000_setup_copper_link(struct e1000_hw *hw); 36static s32 e1000_setup_fiber_serdes_link(struct e1000_hw *hw); 37static s32 e1000_adjust_serdes_amplitude(struct e1000_hw *hw); 38static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw); 39static s32 e1000_config_mac_to_phy(struct e1000_hw *hw); 40static void e1000_raise_mdi_clk(struct e1000_hw *hw, u32 *ctrl); 41static void e1000_lower_mdi_clk(struct e1000_hw *hw, u32 *ctrl); 42static void e1000_shift_out_mdi_bits(struct e1000_hw *hw, u32 data, u16 count); 43static u16 e1000_shift_in_mdi_bits(struct e1000_hw *hw); 44static s32 e1000_phy_reset_dsp(struct e1000_hw *hw); 45static s32 e1000_write_eeprom_spi(struct e1000_hw *hw, u16 offset, 46 u16 words, u16 *data); 47static s32 e1000_write_eeprom_microwire(struct e1000_hw *hw, u16 offset, 48 u16 words, u16 *data); 49static s32 e1000_spi_eeprom_ready(struct e1000_hw *hw); 50static void e1000_raise_ee_clk(struct e1000_hw *hw, u32 *eecd); 51static void e1000_lower_ee_clk(struct e1000_hw *hw, u32 *eecd); 52static void e1000_shift_out_ee_bits(struct e1000_hw *hw, u16 data, u16 count); 53static s32 e1000_write_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr, 54 u16 phy_data); 55static s32 e1000_read_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr, 56 u16 *phy_data); 57static u16 e1000_shift_in_ee_bits(struct e1000_hw *hw, u16 count); 58static s32 e1000_acquire_eeprom(struct e1000_hw *hw); 59static void e1000_release_eeprom(struct e1000_hw *hw); 60static void e1000_standby_eeprom(struct e1000_hw *hw); 61static s32 e1000_set_vco_speed(struct e1000_hw *hw); 62static s32 e1000_polarity_reversal_workaround(struct e1000_hw *hw); 63static s32 e1000_set_phy_mode(struct e1000_hw *hw); 64static s32 e1000_do_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words, 65 u16 *data); 66static s32 e1000_do_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words, 67 u16 *data); 68 69/* IGP cable length table */ 70static const 71u16 e1000_igp_cable_length_table[IGP01E1000_AGC_LENGTH_TABLE_SIZE] = { 72 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 73 5, 10, 10, 10, 10, 10, 10, 10, 20, 20, 20, 20, 20, 25, 25, 25, 74 25, 25, 25, 25, 30, 30, 30, 30, 40, 40, 40, 40, 40, 40, 40, 40, 75 40, 50, 50, 50, 50, 50, 50, 50, 60, 60, 60, 60, 60, 60, 60, 60, 76 60, 70, 70, 70, 70, 70, 70, 80, 80, 80, 80, 80, 80, 90, 90, 90, 77 90, 90, 90, 90, 90, 90, 100, 100, 100, 100, 100, 100, 100, 100, 100, 78 100, 79 100, 100, 100, 100, 110, 110, 110, 110, 110, 110, 110, 110, 110, 110, 80 110, 110, 81 110, 110, 110, 110, 110, 110, 120, 120, 120, 120, 120, 120, 120, 120, 82 120, 120 83}; 84 85static DEFINE_MUTEX(e1000_eeprom_lock); 86static DEFINE_SPINLOCK(e1000_phy_lock); 87 88/** 89 * e1000_set_phy_type - Set the phy type member in the hw struct. 90 * @hw: Struct containing variables accessed by shared code 91 */ 92static s32 e1000_set_phy_type(struct e1000_hw *hw) 93{ 94 if (hw->mac_type == e1000_undefined) 95 return -E1000_ERR_PHY_TYPE; 96 97 switch (hw->phy_id) { 98 case M88E1000_E_PHY_ID: 99 case M88E1000_I_PHY_ID: 100 case M88E1011_I_PHY_ID: 101 case M88E1111_I_PHY_ID: 102 case M88E1118_E_PHY_ID: 103 hw->phy_type = e1000_phy_m88; 104 break; 105 case IGP01E1000_I_PHY_ID: 106 if (hw->mac_type == e1000_82541 || 107 hw->mac_type == e1000_82541_rev_2 || 108 hw->mac_type == e1000_82547 || 109 hw->mac_type == e1000_82547_rev_2) 110 hw->phy_type = e1000_phy_igp; 111 break; 112 case RTL8211B_PHY_ID: 113 hw->phy_type = e1000_phy_8211; 114 break; 115 case RTL8201N_PHY_ID: 116 hw->phy_type = e1000_phy_8201; 117 break; 118 default: 119 /* Should never have loaded on this device */ 120 hw->phy_type = e1000_phy_undefined; 121 return -E1000_ERR_PHY_TYPE; 122 } 123 124 return E1000_SUCCESS; 125} 126 127/** 128 * e1000_phy_init_script - IGP phy init script - initializes the GbE PHY 129 * @hw: Struct containing variables accessed by shared code 130 */ 131static void e1000_phy_init_script(struct e1000_hw *hw) 132{ 133 u16 phy_saved_data; 134 135 if (hw->phy_init_script) { 136 msleep(20); 137 138 /* Save off the current value of register 0x2F5B to be restored 139 * at the end of this routine. 140 */ 141 e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data); 142 143 /* Disabled the PHY transmitter */ 144 e1000_write_phy_reg(hw, 0x2F5B, 0x0003); 145 msleep(20); 146 147 e1000_write_phy_reg(hw, 0x0000, 0x0140); 148 msleep(5); 149 150 switch (hw->mac_type) { 151 case e1000_82541: 152 case e1000_82547: 153 e1000_write_phy_reg(hw, 0x1F95, 0x0001); 154 e1000_write_phy_reg(hw, 0x1F71, 0xBD21); 155 e1000_write_phy_reg(hw, 0x1F79, 0x0018); 156 e1000_write_phy_reg(hw, 0x1F30, 0x1600); 157 e1000_write_phy_reg(hw, 0x1F31, 0x0014); 158 e1000_write_phy_reg(hw, 0x1F32, 0x161C); 159 e1000_write_phy_reg(hw, 0x1F94, 0x0003); 160 e1000_write_phy_reg(hw, 0x1F96, 0x003F); 161 e1000_write_phy_reg(hw, 0x2010, 0x0008); 162 break; 163 164 case e1000_82541_rev_2: 165 case e1000_82547_rev_2: 166 e1000_write_phy_reg(hw, 0x1F73, 0x0099); 167 break; 168 default: 169 break; 170 } 171 172 e1000_write_phy_reg(hw, 0x0000, 0x3300); 173 msleep(20); 174 175 /* Now enable the transmitter */ 176 e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data); 177 178 if (hw->mac_type == e1000_82547) { 179 u16 fused, fine, coarse; 180 181 /* Move to analog registers page */ 182 e1000_read_phy_reg(hw, 183 IGP01E1000_ANALOG_SPARE_FUSE_STATUS, 184 &fused); 185 186 if (!(fused & IGP01E1000_ANALOG_SPARE_FUSE_ENABLED)) { 187 e1000_read_phy_reg(hw, 188 IGP01E1000_ANALOG_FUSE_STATUS, 189 &fused); 190 191 fine = fused & IGP01E1000_ANALOG_FUSE_FINE_MASK; 192 coarse = 193 fused & IGP01E1000_ANALOG_FUSE_COARSE_MASK; 194 195 if (coarse > 196 IGP01E1000_ANALOG_FUSE_COARSE_THRESH) { 197 coarse -= 198 IGP01E1000_ANALOG_FUSE_COARSE_10; 199 fine -= IGP01E1000_ANALOG_FUSE_FINE_1; 200 } else if (coarse == 201 IGP01E1000_ANALOG_FUSE_COARSE_THRESH) 202 fine -= IGP01E1000_ANALOG_FUSE_FINE_10; 203 204 fused = 205 (fused & IGP01E1000_ANALOG_FUSE_POLY_MASK) | 206 (fine & IGP01E1000_ANALOG_FUSE_FINE_MASK) | 207 (coarse & 208 IGP01E1000_ANALOG_FUSE_COARSE_MASK); 209 210 e1000_write_phy_reg(hw, 211 IGP01E1000_ANALOG_FUSE_CONTROL, 212 fused); 213 e1000_write_phy_reg(hw, 214 IGP01E1000_ANALOG_FUSE_BYPASS, 215 IGP01E1000_ANALOG_FUSE_ENABLE_SW_CONTROL); 216 } 217 } 218 } 219} 220 221/** 222 * e1000_set_mac_type - Set the mac type member in the hw struct. 223 * @hw: Struct containing variables accessed by shared code 224 */ 225s32 e1000_set_mac_type(struct e1000_hw *hw) 226{ 227 switch (hw->device_id) { 228 case E1000_DEV_ID_82542: 229 switch (hw->revision_id) { 230 case E1000_82542_2_0_REV_ID: 231 hw->mac_type = e1000_82542_rev2_0; 232 break; 233 case E1000_82542_2_1_REV_ID: 234 hw->mac_type = e1000_82542_rev2_1; 235 break; 236 default: 237 /* Invalid 82542 revision ID */ 238 return -E1000_ERR_MAC_TYPE; 239 } 240 break; 241 case E1000_DEV_ID_82543GC_FIBER: 242 case E1000_DEV_ID_82543GC_COPPER: 243 hw->mac_type = e1000_82543; 244 break; 245 case E1000_DEV_ID_82544EI_COPPER: 246 case E1000_DEV_ID_82544EI_FIBER: 247 case E1000_DEV_ID_82544GC_COPPER: 248 case E1000_DEV_ID_82544GC_LOM: 249 hw->mac_type = e1000_82544; 250 break; 251 case E1000_DEV_ID_82540EM: 252 case E1000_DEV_ID_82540EM_LOM: 253 case E1000_DEV_ID_82540EP: 254 case E1000_DEV_ID_82540EP_LOM: 255 case E1000_DEV_ID_82540EP_LP: 256 hw->mac_type = e1000_82540; 257 break; 258 case E1000_DEV_ID_82545EM_COPPER: 259 case E1000_DEV_ID_82545EM_FIBER: 260 hw->mac_type = e1000_82545; 261 break; 262 case E1000_DEV_ID_82545GM_COPPER: 263 case E1000_DEV_ID_82545GM_FIBER: 264 case E1000_DEV_ID_82545GM_SERDES: 265 hw->mac_type = e1000_82545_rev_3; 266 break; 267 case E1000_DEV_ID_82546EB_COPPER: 268 case E1000_DEV_ID_82546EB_FIBER: 269 case E1000_DEV_ID_82546EB_QUAD_COPPER: 270 hw->mac_type = e1000_82546; 271 break; 272 case E1000_DEV_ID_82546GB_COPPER: 273 case E1000_DEV_ID_82546GB_FIBER: 274 case E1000_DEV_ID_82546GB_SERDES: 275 case E1000_DEV_ID_82546GB_PCIE: 276 case E1000_DEV_ID_82546GB_QUAD_COPPER: 277 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: 278 hw->mac_type = e1000_82546_rev_3; 279 break; 280 case E1000_DEV_ID_82541EI: 281 case E1000_DEV_ID_82541EI_MOBILE: 282 case E1000_DEV_ID_82541ER_LOM: 283 hw->mac_type = e1000_82541; 284 break; 285 case E1000_DEV_ID_82541ER: 286 case E1000_DEV_ID_82541GI: 287 case E1000_DEV_ID_82541GI_LF: 288 case E1000_DEV_ID_82541GI_MOBILE: 289 hw->mac_type = e1000_82541_rev_2; 290 break; 291 case E1000_DEV_ID_82547EI: 292 case E1000_DEV_ID_82547EI_MOBILE: 293 hw->mac_type = e1000_82547; 294 break; 295 case E1000_DEV_ID_82547GI: 296 hw->mac_type = e1000_82547_rev_2; 297 break; 298 case E1000_DEV_ID_INTEL_CE4100_GBE: 299 hw->mac_type = e1000_ce4100; 300 break; 301 default: 302 /* Should never have loaded on this device */ 303 return -E1000_ERR_MAC_TYPE; 304 } 305 306 switch (hw->mac_type) { 307 case e1000_82541: 308 case e1000_82547: 309 case e1000_82541_rev_2: 310 case e1000_82547_rev_2: 311 hw->asf_firmware_present = true; 312 break; 313 default: 314 break; 315 } 316 317 /* The 82543 chip does not count tx_carrier_errors properly in 318 * FD mode 319 */ 320 if (hw->mac_type == e1000_82543) 321 hw->bad_tx_carr_stats_fd = true; 322 323 if (hw->mac_type > e1000_82544) 324 hw->has_smbus = true; 325 326 return E1000_SUCCESS; 327} 328 329/** 330 * e1000_set_media_type - Set media type and TBI compatibility. 331 * @hw: Struct containing variables accessed by shared code 332 */ 333void e1000_set_media_type(struct e1000_hw *hw) 334{ 335 u32 status; 336 337 if (hw->mac_type != e1000_82543) { 338 /* tbi_compatibility is only valid on 82543 */ 339 hw->tbi_compatibility_en = false; 340 } 341 342 switch (hw->device_id) { 343 case E1000_DEV_ID_82545GM_SERDES: 344 case E1000_DEV_ID_82546GB_SERDES: 345 hw->media_type = e1000_media_type_internal_serdes; 346 break; 347 default: 348 switch (hw->mac_type) { 349 case e1000_82542_rev2_0: 350 case e1000_82542_rev2_1: 351 hw->media_type = e1000_media_type_fiber; 352 break; 353 case e1000_ce4100: 354 hw->media_type = e1000_media_type_copper; 355 break; 356 default: 357 status = er32(STATUS); 358 if (status & E1000_STATUS_TBIMODE) { 359 hw->media_type = e1000_media_type_fiber; 360 /* tbi_compatibility not valid on fiber */ 361 hw->tbi_compatibility_en = false; 362 } else { 363 hw->media_type = e1000_media_type_copper; 364 } 365 break; 366 } 367 } 368} 369 370/** 371 * e1000_reset_hw - reset the hardware completely 372 * @hw: Struct containing variables accessed by shared code 373 * 374 * Reset the transmit and receive units; mask and clear all interrupts. 375 */ 376s32 e1000_reset_hw(struct e1000_hw *hw) 377{ 378 u32 ctrl; 379 u32 ctrl_ext; 380 u32 manc; 381 u32 led_ctrl; 382 s32 ret_val; 383 384 /* For 82542 (rev 2.0), disable MWI before issuing a device reset */ 385 if (hw->mac_type == e1000_82542_rev2_0) { 386 e_dbg("Disabling MWI on 82542 rev 2.0\n"); 387 e1000_pci_clear_mwi(hw); 388 } 389 390 /* Clear interrupt mask to stop board from generating interrupts */ 391 e_dbg("Masking off all interrupts\n"); 392 ew32(IMC, 0xffffffff); 393 394 /* Disable the Transmit and Receive units. Then delay to allow 395 * any pending transactions to complete before we hit the MAC with 396 * the global reset. 397 */ 398 ew32(RCTL, 0); 399 ew32(TCTL, E1000_TCTL_PSP); 400 E1000_WRITE_FLUSH(); 401 402 /* The tbi_compatibility_on Flag must be cleared when Rctl is cleared. */ 403 hw->tbi_compatibility_on = false; 404 405 /* Delay to allow any outstanding PCI transactions to complete before 406 * resetting the device 407 */ 408 msleep(10); 409 410 ctrl = er32(CTRL); 411 412 /* Must reset the PHY before resetting the MAC */ 413 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) { 414 ew32(CTRL, (ctrl | E1000_CTRL_PHY_RST)); 415 E1000_WRITE_FLUSH(); 416 msleep(5); 417 } 418 419 /* Issue a global reset to the MAC. This will reset the chip's 420 * transmit, receive, DMA, and link units. It will not effect 421 * the current PCI configuration. The global reset bit is self- 422 * clearing, and should clear within a microsecond. 423 */ 424 e_dbg("Issuing a global reset to MAC\n"); 425 426 switch (hw->mac_type) { 427 case e1000_82544: 428 case e1000_82540: 429 case e1000_82545: 430 case e1000_82546: 431 case e1000_82541: 432 case e1000_82541_rev_2: 433 /* These controllers can't ack the 64-bit write when issuing the 434 * reset, so use IO-mapping as a workaround to issue the reset 435 */ 436 E1000_WRITE_REG_IO(hw, CTRL, (ctrl | E1000_CTRL_RST)); 437 break; 438 case e1000_82545_rev_3: 439 case e1000_82546_rev_3: 440 /* Reset is performed on a shadow of the control register */ 441 ew32(CTRL_DUP, (ctrl | E1000_CTRL_RST)); 442 break; 443 case e1000_ce4100: 444 default: 445 ew32(CTRL, (ctrl | E1000_CTRL_RST)); 446 break; 447 } 448 449 /* After MAC reset, force reload of EEPROM to restore power-on settings 450 * to device. Later controllers reload the EEPROM automatically, so 451 * just wait for reload to complete. 452 */ 453 switch (hw->mac_type) { 454 case e1000_82542_rev2_0: 455 case e1000_82542_rev2_1: 456 case e1000_82543: 457 case e1000_82544: 458 /* Wait for reset to complete */ 459 udelay(10); 460 ctrl_ext = er32(CTRL_EXT); 461 ctrl_ext |= E1000_CTRL_EXT_EE_RST; 462 ew32(CTRL_EXT, ctrl_ext); 463 E1000_WRITE_FLUSH(); 464 /* Wait for EEPROM reload */ 465 msleep(2); 466 break; 467 case e1000_82541: 468 case e1000_82541_rev_2: 469 case e1000_82547: 470 case e1000_82547_rev_2: 471 /* Wait for EEPROM reload */ 472 msleep(20); 473 break; 474 default: 475 /* Auto read done will delay 5ms or poll based on mac type */ 476 ret_val = e1000_get_auto_rd_done(hw); 477 if (ret_val) 478 return ret_val; 479 break; 480 } 481 482 /* Disable HW ARPs on ASF enabled adapters */ 483 if (hw->mac_type >= e1000_82540) { 484 manc = er32(MANC); 485 manc &= ~(E1000_MANC_ARP_EN); 486 ew32(MANC, manc); 487 } 488 489 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) { 490 e1000_phy_init_script(hw); 491 492 /* Configure activity LED after PHY reset */ 493 led_ctrl = er32(LEDCTL); 494 led_ctrl &= IGP_ACTIVITY_LED_MASK; 495 led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE); 496 ew32(LEDCTL, led_ctrl); 497 } 498 499 /* Clear interrupt mask to stop board from generating interrupts */ 500 e_dbg("Masking off all interrupts\n"); 501 ew32(IMC, 0xffffffff); 502 503 /* Clear any pending interrupt events. */ 504 er32(ICR); 505 506 /* If MWI was previously enabled, reenable it. */ 507 if (hw->mac_type == e1000_82542_rev2_0) { 508 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) 509 e1000_pci_set_mwi(hw); 510 } 511 512 return E1000_SUCCESS; 513} 514 515/** 516 * e1000_init_hw - Performs basic configuration of the adapter. 517 * @hw: Struct containing variables accessed by shared code 518 * 519 * Assumes that the controller has previously been reset and is in a 520 * post-reset uninitialized state. Initializes the receive address registers, 521 * multicast table, and VLAN filter table. Calls routines to setup link 522 * configuration and flow control settings. Clears all on-chip counters. Leaves 523 * the transmit and receive units disabled and uninitialized. 524 */ 525s32 e1000_init_hw(struct e1000_hw *hw) 526{ 527 u32 ctrl; 528 u32 i; 529 s32 ret_val; 530 u32 mta_size; 531 u32 ctrl_ext; 532 533 /* Initialize Identification LED */ 534 ret_val = e1000_id_led_init(hw); 535 if (ret_val) { 536 e_dbg("Error Initializing Identification LED\n"); 537 return ret_val; 538 } 539 540 /* Set the media type and TBI compatibility */ 541 e1000_set_media_type(hw); 542 543 /* Disabling VLAN filtering. */ 544 e_dbg("Initializing the IEEE VLAN\n"); 545 if (hw->mac_type < e1000_82545_rev_3) 546 ew32(VET, 0); 547 e1000_clear_vfta(hw); 548 549 /* For 82542 (rev 2.0), disable MWI and put the receiver into reset */ 550 if (hw->mac_type == e1000_82542_rev2_0) { 551 e_dbg("Disabling MWI on 82542 rev 2.0\n"); 552 e1000_pci_clear_mwi(hw); 553 ew32(RCTL, E1000_RCTL_RST); 554 E1000_WRITE_FLUSH(); 555 msleep(5); 556 } 557 558 /* Setup the receive address. This involves initializing all of the 559 * Receive Address Registers (RARs 0 - 15). 560 */ 561 e1000_init_rx_addrs(hw); 562 563 /* For 82542 (rev 2.0), take the receiver out of reset and enable MWI */ 564 if (hw->mac_type == e1000_82542_rev2_0) { 565 ew32(RCTL, 0); 566 E1000_WRITE_FLUSH(); 567 msleep(1); 568 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) 569 e1000_pci_set_mwi(hw); 570 } 571 572 /* Zero out the Multicast HASH table */ 573 e_dbg("Zeroing the MTA\n"); 574 mta_size = E1000_MC_TBL_SIZE; 575 for (i = 0; i < mta_size; i++) { 576 E1000_WRITE_REG_ARRAY(hw, MTA, i, 0); 577 /* use write flush to prevent Memory Write Block (MWB) from 578 * occurring when accessing our register space 579 */ 580 E1000_WRITE_FLUSH(); 581 } 582 583 /* Set the PCI priority bit correctly in the CTRL register. This 584 * determines if the adapter gives priority to receives, or if it 585 * gives equal priority to transmits and receives. Valid only on 586 * 82542 and 82543 silicon. 587 */ 588 if (hw->dma_fairness && hw->mac_type <= e1000_82543) { 589 ctrl = er32(CTRL); 590 ew32(CTRL, ctrl | E1000_CTRL_PRIOR); 591 } 592 593 switch (hw->mac_type) { 594 case e1000_82545_rev_3: 595 case e1000_82546_rev_3: 596 break; 597 default: 598 /* Workaround for PCI-X problem when BIOS sets MMRBC 599 * incorrectly. 600 */ 601 if (hw->bus_type == e1000_bus_type_pcix && 602 e1000_pcix_get_mmrbc(hw) > 2048) 603 e1000_pcix_set_mmrbc(hw, 2048); 604 break; 605 } 606 607 /* Call a subroutine to configure the link and setup flow control. */ 608 ret_val = e1000_setup_link(hw); 609 610 /* Set the transmit descriptor write-back policy */ 611 if (hw->mac_type > e1000_82544) { 612 ctrl = er32(TXDCTL); 613 ctrl = 614 (ctrl & ~E1000_TXDCTL_WTHRESH) | 615 E1000_TXDCTL_FULL_TX_DESC_WB; 616 ew32(TXDCTL, ctrl); 617 } 618 619 /* Clear all of the statistics registers (clear on read). It is 620 * important that we do this after we have tried to establish link 621 * because the symbol error count will increment wildly if there 622 * is no link. 623 */ 624 e1000_clear_hw_cntrs(hw); 625 626 if (hw->device_id == E1000_DEV_ID_82546GB_QUAD_COPPER || 627 hw->device_id == E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3) { 628 ctrl_ext = er32(CTRL_EXT); 629 /* Relaxed ordering must be disabled to avoid a parity 630 * error crash in a PCI slot. 631 */ 632 ctrl_ext |= E1000_CTRL_EXT_RO_DIS; 633 ew32(CTRL_EXT, ctrl_ext); 634 } 635 636 return ret_val; 637} 638 639/** 640 * e1000_adjust_serdes_amplitude - Adjust SERDES output amplitude based on EEPROM setting. 641 * @hw: Struct containing variables accessed by shared code. 642 */ 643static s32 e1000_adjust_serdes_amplitude(struct e1000_hw *hw) 644{ 645 u16 eeprom_data; 646 s32 ret_val; 647 648 if (hw->media_type != e1000_media_type_internal_serdes) 649 return E1000_SUCCESS; 650 651 switch (hw->mac_type) { 652 case e1000_82545_rev_3: 653 case e1000_82546_rev_3: 654 break; 655 default: 656 return E1000_SUCCESS; 657 } 658 659 ret_val = e1000_read_eeprom(hw, EEPROM_SERDES_AMPLITUDE, 1, 660 &eeprom_data); 661 if (ret_val) 662 return ret_val; 663 664 if (eeprom_data != EEPROM_RESERVED_WORD) { 665 /* Adjust SERDES output amplitude only. */ 666 eeprom_data &= EEPROM_SERDES_AMPLITUDE_MASK; 667 ret_val = 668 e1000_write_phy_reg(hw, M88E1000_PHY_EXT_CTRL, eeprom_data); 669 if (ret_val) 670 return ret_val; 671 } 672 673 return E1000_SUCCESS; 674} 675 676/** 677 * e1000_setup_link - Configures flow control and link settings. 678 * @hw: Struct containing variables accessed by shared code 679 * 680 * Determines which flow control settings to use. Calls the appropriate media- 681 * specific link configuration function. Configures the flow control settings. 682 * Assuming the adapter has a valid link partner, a valid link should be 683 * established. Assumes the hardware has previously been reset and the 684 * transmitter and receiver are not enabled. 685 */ 686s32 e1000_setup_link(struct e1000_hw *hw) 687{ 688 u32 ctrl_ext; 689 s32 ret_val; 690 u16 eeprom_data; 691 692 /* Read and store word 0x0F of the EEPROM. This word contains bits 693 * that determine the hardware's default PAUSE (flow control) mode, 694 * a bit that determines whether the HW defaults to enabling or 695 * disabling auto-negotiation, and the direction of the 696 * SW defined pins. If there is no SW over-ride of the flow 697 * control setting, then the variable hw->fc will 698 * be initialized based on a value in the EEPROM. 699 */ 700 if (hw->fc == E1000_FC_DEFAULT) { 701 ret_val = e1000_read_eeprom(hw, EEPROM_INIT_CONTROL2_REG, 702 1, &eeprom_data); 703 if (ret_val) { 704 e_dbg("EEPROM Read Error\n"); 705 return -E1000_ERR_EEPROM; 706 } 707 if ((eeprom_data & EEPROM_WORD0F_PAUSE_MASK) == 0) 708 hw->fc = E1000_FC_NONE; 709 else if ((eeprom_data & EEPROM_WORD0F_PAUSE_MASK) == 710 EEPROM_WORD0F_ASM_DIR) 711 hw->fc = E1000_FC_TX_PAUSE; 712 else 713 hw->fc = E1000_FC_FULL; 714 } 715 716 /* We want to save off the original Flow Control configuration just 717 * in case we get disconnected and then reconnected into a different 718 * hub or switch with different Flow Control capabilities. 719 */ 720 if (hw->mac_type == e1000_82542_rev2_0) 721 hw->fc &= (~E1000_FC_TX_PAUSE); 722 723 if ((hw->mac_type < e1000_82543) && (hw->report_tx_early == 1)) 724 hw->fc &= (~E1000_FC_RX_PAUSE); 725 726 hw->original_fc = hw->fc; 727 728 e_dbg("After fix-ups FlowControl is now = %x\n", hw->fc); 729 730 /* Take the 4 bits from EEPROM word 0x0F that determine the initial 731 * polarity value for the SW controlled pins, and setup the 732 * Extended Device Control reg with that info. 733 * This is needed because one of the SW controlled pins is used for 734 * signal detection. So this should be done before e1000_setup_pcs_link() 735 * or e1000_phy_setup() is called. 736 */ 737 if (hw->mac_type == e1000_82543) { 738 ret_val = e1000_read_eeprom(hw, EEPROM_INIT_CONTROL2_REG, 739 1, &eeprom_data); 740 if (ret_val) { 741 e_dbg("EEPROM Read Error\n"); 742 return -E1000_ERR_EEPROM; 743 } 744 ctrl_ext = ((eeprom_data & EEPROM_WORD0F_SWPDIO_EXT) << 745 SWDPIO__EXT_SHIFT); 746 ew32(CTRL_EXT, ctrl_ext); 747 } 748 749 /* Call the necessary subroutine to configure the link. */ 750 ret_val = (hw->media_type == e1000_media_type_copper) ? 751 e1000_setup_copper_link(hw) : e1000_setup_fiber_serdes_link(hw); 752 753 /* Initialize the flow control address, type, and PAUSE timer 754 * registers to their default values. This is done even if flow 755 * control is disabled, because it does not hurt anything to 756 * initialize these registers. 757 */ 758 e_dbg("Initializing the Flow Control address, type and timer regs\n"); 759 760 ew32(FCT, FLOW_CONTROL_TYPE); 761 ew32(FCAH, FLOW_CONTROL_ADDRESS_HIGH); 762 ew32(FCAL, FLOW_CONTROL_ADDRESS_LOW); 763 764 ew32(FCTTV, hw->fc_pause_time); 765 766 /* Set the flow control receive threshold registers. Normally, 767 * these registers will be set to a default threshold that may be 768 * adjusted later by the driver's runtime code. However, if the 769 * ability to transmit pause frames in not enabled, then these 770 * registers will be set to 0. 771 */ 772 if (!(hw->fc & E1000_FC_TX_PAUSE)) { 773 ew32(FCRTL, 0); 774 ew32(FCRTH, 0); 775 } else { 776 /* We need to set up the Receive Threshold high and low water 777 * marks as well as (optionally) enabling the transmission of 778 * XON frames. 779 */ 780 if (hw->fc_send_xon) { 781 ew32(FCRTL, (hw->fc_low_water | E1000_FCRTL_XONE)); 782 ew32(FCRTH, hw->fc_high_water); 783 } else { 784 ew32(FCRTL, hw->fc_low_water); 785 ew32(FCRTH, hw->fc_high_water); 786 } 787 } 788 return ret_val; 789} 790 791/** 792 * e1000_setup_fiber_serdes_link - prepare fiber or serdes link 793 * @hw: Struct containing variables accessed by shared code 794 * 795 * Manipulates Physical Coding Sublayer functions in order to configure 796 * link. Assumes the hardware has been previously reset and the transmitter 797 * and receiver are not enabled. 798 */ 799static s32 e1000_setup_fiber_serdes_link(struct e1000_hw *hw) 800{ 801 u32 ctrl; 802 u32 status; 803 u32 txcw = 0; 804 u32 i; 805 u32 signal = 0; 806 s32 ret_val; 807 808 /* On adapters with a MAC newer than 82544, SWDP 1 will be 809 * set when the optics detect a signal. On older adapters, it will be 810 * cleared when there is a signal. This applies to fiber media only. 811 * If we're on serdes media, adjust the output amplitude to value 812 * set in the EEPROM. 813 */ 814 ctrl = er32(CTRL); 815 if (hw->media_type == e1000_media_type_fiber) 816 signal = (hw->mac_type > e1000_82544) ? E1000_CTRL_SWDPIN1 : 0; 817 818 ret_val = e1000_adjust_serdes_amplitude(hw); 819 if (ret_val) 820 return ret_val; 821 822 /* Take the link out of reset */ 823 ctrl &= ~(E1000_CTRL_LRST); 824 825 /* Adjust VCO speed to improve BER performance */ 826 ret_val = e1000_set_vco_speed(hw); 827 if (ret_val) 828 return ret_val; 829 830 e1000_config_collision_dist(hw); 831 832 /* Check for a software override of the flow control settings, and setup 833 * the device accordingly. If auto-negotiation is enabled, then 834 * software will have to set the "PAUSE" bits to the correct value in 835 * the Tranmsit Config Word Register (TXCW) and re-start 836 * auto-negotiation. However, if auto-negotiation is disabled, then 837 * software will have to manually configure the two flow control enable 838 * bits in the CTRL register. 839 * 840 * The possible values of the "fc" parameter are: 841 * 0: Flow control is completely disabled 842 * 1: Rx flow control is enabled (we can receive pause frames, but 843 * not send pause frames). 844 * 2: Tx flow control is enabled (we can send pause frames but we do 845 * not support receiving pause frames). 846 * 3: Both Rx and TX flow control (symmetric) are enabled. 847 */ 848 switch (hw->fc) { 849 case E1000_FC_NONE: 850 /* Flow ctrl is completely disabled by a software over-ride */ 851 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD); 852 break; 853 case E1000_FC_RX_PAUSE: 854 /* Rx Flow control is enabled and Tx Flow control is disabled by 855 * a software over-ride. Since there really isn't a way to 856 * advertise that we are capable of Rx Pause ONLY, we will 857 * advertise that we support both symmetric and asymmetric Rx 858 * PAUSE. Later, we will disable the adapter's ability to send 859 * PAUSE frames. 860 */ 861 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK); 862 break; 863 case E1000_FC_TX_PAUSE: 864 /* Tx Flow control is enabled, and Rx Flow control is disabled, 865 * by a software over-ride. 866 */ 867 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_ASM_DIR); 868 break; 869 case E1000_FC_FULL: 870 /* Flow control (both Rx and Tx) is enabled by a software 871 * over-ride. 872 */ 873 txcw = (E1000_TXCW_ANE | E1000_TXCW_FD | E1000_TXCW_PAUSE_MASK); 874 break; 875 default: 876 e_dbg("Flow control param set incorrectly\n"); 877 return -E1000_ERR_CONFIG; 878 } 879 880 /* Since auto-negotiation is enabled, take the link out of reset (the 881 * link will be in reset, because we previously reset the chip). This 882 * will restart auto-negotiation. If auto-negotiation is successful 883 * then the link-up status bit will be set and the flow control enable 884 * bits (RFCE and TFCE) will be set according to their negotiated value. 885 */ 886 e_dbg("Auto-negotiation enabled\n"); 887 888 ew32(TXCW, txcw); 889 ew32(CTRL, ctrl); 890 E1000_WRITE_FLUSH(); 891 892 hw->txcw = txcw; 893 msleep(1); 894 895 /* If we have a signal (the cable is plugged in) then poll for a 896 * "Link-Up" indication in the Device Status Register. Time-out if a 897 * link isn't seen in 500 milliseconds seconds (Auto-negotiation should 898 * complete in less than 500 milliseconds even if the other end is doing 899 * it in SW). For internal serdes, we just assume a signal is present, 900 * then poll. 901 */ 902 if (hw->media_type == e1000_media_type_internal_serdes || 903 (er32(CTRL) & E1000_CTRL_SWDPIN1) == signal) { 904 e_dbg("Looking for Link\n"); 905 for (i = 0; i < (LINK_UP_TIMEOUT / 10); i++) { 906 msleep(10); 907 status = er32(STATUS); 908 if (status & E1000_STATUS_LU) 909 break; 910 } 911 if (i == (LINK_UP_TIMEOUT / 10)) { 912 e_dbg("Never got a valid link from auto-neg!!!\n"); 913 hw->autoneg_failed = 1; 914 /* AutoNeg failed to achieve a link, so we'll call 915 * e1000_check_for_link. This routine will force the 916 * link up if we detect a signal. This will allow us to 917 * communicate with non-autonegotiating link partners. 918 */ 919 ret_val = e1000_check_for_link(hw); 920 if (ret_val) { 921 e_dbg("Error while checking for link\n"); 922 return ret_val; 923 } 924 hw->autoneg_failed = 0; 925 } else { 926 hw->autoneg_failed = 0; 927 e_dbg("Valid Link Found\n"); 928 } 929 } else { 930 e_dbg("No Signal Detected\n"); 931 } 932 return E1000_SUCCESS; 933} 934 935/** 936 * e1000_copper_link_rtl_setup - Copper link setup for e1000_phy_rtl series. 937 * @hw: Struct containing variables accessed by shared code 938 * 939 * Commits changes to PHY configuration by calling e1000_phy_reset(). 940 */ 941static s32 e1000_copper_link_rtl_setup(struct e1000_hw *hw) 942{ 943 s32 ret_val; 944 945 /* SW reset the PHY so all changes take effect */ 946 ret_val = e1000_phy_reset(hw); 947 if (ret_val) { 948 e_dbg("Error Resetting the PHY\n"); 949 return ret_val; 950 } 951 952 return E1000_SUCCESS; 953} 954 955static s32 gbe_dhg_phy_setup(struct e1000_hw *hw) 956{ 957 s32 ret_val; 958 u32 ctrl_aux; 959 960 switch (hw->phy_type) { 961 case e1000_phy_8211: 962 ret_val = e1000_copper_link_rtl_setup(hw); 963 if (ret_val) { 964 e_dbg("e1000_copper_link_rtl_setup failed!\n"); 965 return ret_val; 966 } 967 break; 968 case e1000_phy_8201: 969 /* Set RMII mode */ 970 ctrl_aux = er32(CTL_AUX); 971 ctrl_aux |= E1000_CTL_AUX_RMII; 972 ew32(CTL_AUX, ctrl_aux); 973 E1000_WRITE_FLUSH(); 974 975 /* Disable the J/K bits required for receive */ 976 ctrl_aux = er32(CTL_AUX); 977 ctrl_aux |= 0x4; 978 ctrl_aux &= ~0x2; 979 ew32(CTL_AUX, ctrl_aux); 980 E1000_WRITE_FLUSH(); 981 ret_val = e1000_copper_link_rtl_setup(hw); 982 983 if (ret_val) { 984 e_dbg("e1000_copper_link_rtl_setup failed!\n"); 985 return ret_val; 986 } 987 break; 988 default: 989 e_dbg("Error Resetting the PHY\n"); 990 return E1000_ERR_PHY_TYPE; 991 } 992 993 return E1000_SUCCESS; 994} 995 996/** 997 * e1000_copper_link_preconfig - early configuration for copper 998 * @hw: Struct containing variables accessed by shared code 999 * 1000 * Make sure we have a valid PHY and change PHY mode before link setup. 1001 */ 1002static s32 e1000_copper_link_preconfig(struct e1000_hw *hw) 1003{ 1004 u32 ctrl; 1005 s32 ret_val; 1006 u16 phy_data; 1007 1008 ctrl = er32(CTRL); 1009 /* With 82543, we need to force speed and duplex on the MAC equal to 1010 * what the PHY speed and duplex configuration is. In addition, we need 1011 * to perform a hardware reset on the PHY to take it out of reset. 1012 */ 1013 if (hw->mac_type > e1000_82543) { 1014 ctrl |= E1000_CTRL_SLU; 1015 ctrl &= ~(E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX); 1016 ew32(CTRL, ctrl); 1017 } else { 1018 ctrl |= 1019 (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX | E1000_CTRL_SLU); 1020 ew32(CTRL, ctrl); 1021 ret_val = e1000_phy_hw_reset(hw); 1022 if (ret_val) 1023 return ret_val; 1024 } 1025 1026 /* Make sure we have a valid PHY */ 1027 ret_val = e1000_detect_gig_phy(hw); 1028 if (ret_val) { 1029 e_dbg("Error, did not detect valid phy.\n"); 1030 return ret_val; 1031 } 1032 e_dbg("Phy ID = %x\n", hw->phy_id); 1033 1034 /* Set PHY to class A mode (if necessary) */ 1035 ret_val = e1000_set_phy_mode(hw); 1036 if (ret_val) 1037 return ret_val; 1038 1039 if ((hw->mac_type == e1000_82545_rev_3) || 1040 (hw->mac_type == e1000_82546_rev_3)) { 1041 ret_val = 1042 e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1043 phy_data |= 0x00000008; 1044 ret_val = 1045 e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 1046 } 1047 1048 if (hw->mac_type <= e1000_82543 || 1049 hw->mac_type == e1000_82541 || hw->mac_type == e1000_82547 || 1050 hw->mac_type == e1000_82541_rev_2 || 1051 hw->mac_type == e1000_82547_rev_2) 1052 hw->phy_reset_disable = false; 1053 1054 return E1000_SUCCESS; 1055} 1056 1057/** 1058 * e1000_copper_link_igp_setup - Copper link setup for e1000_phy_igp series. 1059 * @hw: Struct containing variables accessed by shared code 1060 */ 1061static s32 e1000_copper_link_igp_setup(struct e1000_hw *hw) 1062{ 1063 u32 led_ctrl; 1064 s32 ret_val; 1065 u16 phy_data; 1066 1067 if (hw->phy_reset_disable) 1068 return E1000_SUCCESS; 1069 1070 ret_val = e1000_phy_reset(hw); 1071 if (ret_val) { 1072 e_dbg("Error Resetting the PHY\n"); 1073 return ret_val; 1074 } 1075 1076 /* Wait 15ms for MAC to configure PHY from eeprom settings */ 1077 msleep(15); 1078 /* Configure activity LED after PHY reset */ 1079 led_ctrl = er32(LEDCTL); 1080 led_ctrl &= IGP_ACTIVITY_LED_MASK; 1081 led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE); 1082 ew32(LEDCTL, led_ctrl); 1083 1084 /* The NVM settings will configure LPLU in D3 for IGP2 and IGP3 PHYs */ 1085 if (hw->phy_type == e1000_phy_igp) { 1086 /* disable lplu d3 during driver init */ 1087 ret_val = e1000_set_d3_lplu_state(hw, false); 1088 if (ret_val) { 1089 e_dbg("Error Disabling LPLU D3\n"); 1090 return ret_val; 1091 } 1092 } 1093 1094 /* Configure mdi-mdix settings */ 1095 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data); 1096 if (ret_val) 1097 return ret_val; 1098 1099 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) { 1100 hw->dsp_config_state = e1000_dsp_config_disabled; 1101 /* Force MDI for earlier revs of the IGP PHY */ 1102 phy_data &= 1103 ~(IGP01E1000_PSCR_AUTO_MDIX | 1104 IGP01E1000_PSCR_FORCE_MDI_MDIX); 1105 hw->mdix = 1; 1106 1107 } else { 1108 hw->dsp_config_state = e1000_dsp_config_enabled; 1109 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX; 1110 1111 switch (hw->mdix) { 1112 case 1: 1113 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX; 1114 break; 1115 case 2: 1116 phy_data |= IGP01E1000_PSCR_FORCE_MDI_MDIX; 1117 break; 1118 case 0: 1119 default: 1120 phy_data |= IGP01E1000_PSCR_AUTO_MDIX; 1121 break; 1122 } 1123 } 1124 ret_val = e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data); 1125 if (ret_val) 1126 return ret_val; 1127 1128 /* set auto-master slave resolution settings */ 1129 if (hw->autoneg) { 1130 e1000_ms_type phy_ms_setting = hw->master_slave; 1131 1132 if (hw->ffe_config_state == e1000_ffe_config_active) 1133 hw->ffe_config_state = e1000_ffe_config_enabled; 1134 1135 if (hw->dsp_config_state == e1000_dsp_config_activated) 1136 hw->dsp_config_state = e1000_dsp_config_enabled; 1137 1138 /* when autonegotiation advertisement is only 1000Mbps then we 1139 * should disable SmartSpeed and enable Auto MasterSlave 1140 * resolution as hardware default. 1141 */ 1142 if (hw->autoneg_advertised == ADVERTISE_1000_FULL) { 1143 /* Disable SmartSpeed */ 1144 ret_val = 1145 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 1146 &phy_data); 1147 if (ret_val) 1148 return ret_val; 1149 phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED; 1150 ret_val = 1151 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 1152 phy_data); 1153 if (ret_val) 1154 return ret_val; 1155 /* Set auto Master/Slave resolution process */ 1156 ret_val = 1157 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_data); 1158 if (ret_val) 1159 return ret_val; 1160 phy_data &= ~CR_1000T_MS_ENABLE; 1161 ret_val = 1162 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_data); 1163 if (ret_val) 1164 return ret_val; 1165 } 1166 1167 ret_val = e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_data); 1168 if (ret_val) 1169 return ret_val; 1170 1171 /* load defaults for future use */ 1172 hw->original_master_slave = (phy_data & CR_1000T_MS_ENABLE) ? 1173 ((phy_data & CR_1000T_MS_VALUE) ? 1174 e1000_ms_force_master : 1175 e1000_ms_force_slave) : e1000_ms_auto; 1176 1177 switch (phy_ms_setting) { 1178 case e1000_ms_force_master: 1179 phy_data |= (CR_1000T_MS_ENABLE | CR_1000T_MS_VALUE); 1180 break; 1181 case e1000_ms_force_slave: 1182 phy_data |= CR_1000T_MS_ENABLE; 1183 phy_data &= ~(CR_1000T_MS_VALUE); 1184 break; 1185 case e1000_ms_auto: 1186 phy_data &= ~CR_1000T_MS_ENABLE; 1187 break; 1188 default: 1189 break; 1190 } 1191 ret_val = e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_data); 1192 if (ret_val) 1193 return ret_val; 1194 } 1195 1196 return E1000_SUCCESS; 1197} 1198 1199/** 1200 * e1000_copper_link_mgp_setup - Copper link setup for e1000_phy_m88 series. 1201 * @hw: Struct containing variables accessed by shared code 1202 */ 1203static s32 e1000_copper_link_mgp_setup(struct e1000_hw *hw) 1204{ 1205 s32 ret_val; 1206 u16 phy_data; 1207 1208 if (hw->phy_reset_disable) 1209 return E1000_SUCCESS; 1210 1211 /* Enable CRS on TX. This must be set for half-duplex operation. */ 1212 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1213 if (ret_val) 1214 return ret_val; 1215 1216 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX; 1217 1218 /* Options: 1219 * MDI/MDI-X = 0 (default) 1220 * 0 - Auto for all speeds 1221 * 1 - MDI mode 1222 * 2 - MDI-X mode 1223 * 3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes) 1224 */ 1225 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE; 1226 1227 switch (hw->mdix) { 1228 case 1: 1229 phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE; 1230 break; 1231 case 2: 1232 phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE; 1233 break; 1234 case 3: 1235 phy_data |= M88E1000_PSCR_AUTO_X_1000T; 1236 break; 1237 case 0: 1238 default: 1239 phy_data |= M88E1000_PSCR_AUTO_X_MODE; 1240 break; 1241 } 1242 1243 /* Options: 1244 * disable_polarity_correction = 0 (default) 1245 * Automatic Correction for Reversed Cable Polarity 1246 * 0 - Disabled 1247 * 1 - Enabled 1248 */ 1249 phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL; 1250 if (hw->disable_polarity_correction == 1) 1251 phy_data |= M88E1000_PSCR_POLARITY_REVERSAL; 1252 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 1253 if (ret_val) 1254 return ret_val; 1255 1256 if (hw->phy_revision < M88E1011_I_REV_4) { 1257 /* Force TX_CLK in the Extended PHY Specific Control Register 1258 * to 25MHz clock. 1259 */ 1260 ret_val = 1261 e1000_read_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL, 1262 &phy_data); 1263 if (ret_val) 1264 return ret_val; 1265 1266 phy_data |= M88E1000_EPSCR_TX_CLK_25; 1267 1268 if ((hw->phy_revision == E1000_REVISION_2) && 1269 (hw->phy_id == M88E1111_I_PHY_ID)) { 1270 /* Vidalia Phy, set the downshift counter to 5x */ 1271 phy_data &= ~(M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK); 1272 phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X; 1273 ret_val = e1000_write_phy_reg(hw, 1274 M88E1000_EXT_PHY_SPEC_CTRL, 1275 phy_data); 1276 if (ret_val) 1277 return ret_val; 1278 } else { 1279 /* Configure Master and Slave downshift values */ 1280 phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK | 1281 M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK); 1282 phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X | 1283 M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X); 1284 ret_val = e1000_write_phy_reg(hw, 1285 M88E1000_EXT_PHY_SPEC_CTRL, 1286 phy_data); 1287 if (ret_val) 1288 return ret_val; 1289 } 1290 } 1291 1292 /* SW Reset the PHY so all changes take effect */ 1293 ret_val = e1000_phy_reset(hw); 1294 if (ret_val) { 1295 e_dbg("Error Resetting the PHY\n"); 1296 return ret_val; 1297 } 1298 1299 return E1000_SUCCESS; 1300} 1301 1302/** 1303 * e1000_copper_link_autoneg - setup auto-neg 1304 * @hw: Struct containing variables accessed by shared code 1305 * 1306 * Setup auto-negotiation and flow control advertisements, 1307 * and then perform auto-negotiation. 1308 */ 1309static s32 e1000_copper_link_autoneg(struct e1000_hw *hw) 1310{ 1311 s32 ret_val; 1312 u16 phy_data; 1313 1314 /* Perform some bounds checking on the hw->autoneg_advertised 1315 * parameter. If this variable is zero, then set it to the default. 1316 */ 1317 hw->autoneg_advertised &= AUTONEG_ADVERTISE_SPEED_DEFAULT; 1318 1319 /* If autoneg_advertised is zero, we assume it was not defaulted 1320 * by the calling code so we set to advertise full capability. 1321 */ 1322 if (hw->autoneg_advertised == 0) 1323 hw->autoneg_advertised = AUTONEG_ADVERTISE_SPEED_DEFAULT; 1324 1325 /* IFE/RTL8201N PHY only supports 10/100 */ 1326 if (hw->phy_type == e1000_phy_8201) 1327 hw->autoneg_advertised &= AUTONEG_ADVERTISE_10_100_ALL; 1328 1329 e_dbg("Reconfiguring auto-neg advertisement params\n"); 1330 ret_val = e1000_phy_setup_autoneg(hw); 1331 if (ret_val) { 1332 e_dbg("Error Setting up Auto-Negotiation\n"); 1333 return ret_val; 1334 } 1335 e_dbg("Restarting Auto-Neg\n"); 1336 1337 /* Restart auto-negotiation by setting the Auto Neg Enable bit and 1338 * the Auto Neg Restart bit in the PHY control register. 1339 */ 1340 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data); 1341 if (ret_val) 1342 return ret_val; 1343 1344 phy_data |= (MII_CR_AUTO_NEG_EN | MII_CR_RESTART_AUTO_NEG); 1345 ret_val = e1000_write_phy_reg(hw, PHY_CTRL, phy_data); 1346 if (ret_val) 1347 return ret_val; 1348 1349 /* Does the user want to wait for Auto-Neg to complete here, or 1350 * check at a later time (for example, callback routine). 1351 */ 1352 if (hw->wait_autoneg_complete) { 1353 ret_val = e1000_wait_autoneg(hw); 1354 if (ret_val) { 1355 e_dbg 1356 ("Error while waiting for autoneg to complete\n"); 1357 return ret_val; 1358 } 1359 } 1360 1361 hw->get_link_status = true; 1362 1363 return E1000_SUCCESS; 1364} 1365 1366/** 1367 * e1000_copper_link_postconfig - post link setup 1368 * @hw: Struct containing variables accessed by shared code 1369 * 1370 * Config the MAC and the PHY after link is up. 1371 * 1) Set up the MAC to the current PHY speed/duplex 1372 * if we are on 82543. If we 1373 * are on newer silicon, we only need to configure 1374 * collision distance in the Transmit Control Register. 1375 * 2) Set up flow control on the MAC to that established with 1376 * the link partner. 1377 * 3) Config DSP to improve Gigabit link quality for some PHY revisions. 1378 */ 1379static s32 e1000_copper_link_postconfig(struct e1000_hw *hw) 1380{ 1381 s32 ret_val; 1382 1383 if ((hw->mac_type >= e1000_82544) && (hw->mac_type != e1000_ce4100)) { 1384 e1000_config_collision_dist(hw); 1385 } else { 1386 ret_val = e1000_config_mac_to_phy(hw); 1387 if (ret_val) { 1388 e_dbg("Error configuring MAC to PHY settings\n"); 1389 return ret_val; 1390 } 1391 } 1392 ret_val = e1000_config_fc_after_link_up(hw); 1393 if (ret_val) { 1394 e_dbg("Error Configuring Flow Control\n"); 1395 return ret_val; 1396 } 1397 1398 /* Config DSP to improve Giga link quality */ 1399 if (hw->phy_type == e1000_phy_igp) { 1400 ret_val = e1000_config_dsp_after_link_change(hw, true); 1401 if (ret_val) { 1402 e_dbg("Error Configuring DSP after link up\n"); 1403 return ret_val; 1404 } 1405 } 1406 1407 return E1000_SUCCESS; 1408} 1409 1410/** 1411 * e1000_setup_copper_link - phy/speed/duplex setting 1412 * @hw: Struct containing variables accessed by shared code 1413 * 1414 * Detects which PHY is present and sets up the speed and duplex 1415 */ 1416static s32 e1000_setup_copper_link(struct e1000_hw *hw) 1417{ 1418 s32 ret_val; 1419 u16 i; 1420 u16 phy_data; 1421 1422 /* Check if it is a valid PHY and set PHY mode if necessary. */ 1423 ret_val = e1000_copper_link_preconfig(hw); 1424 if (ret_val) 1425 return ret_val; 1426 1427 if (hw->phy_type == e1000_phy_igp) { 1428 ret_val = e1000_copper_link_igp_setup(hw); 1429 if (ret_val) 1430 return ret_val; 1431 } else if (hw->phy_type == e1000_phy_m88) { 1432 ret_val = e1000_copper_link_mgp_setup(hw); 1433 if (ret_val) 1434 return ret_val; 1435 } else { 1436 ret_val = gbe_dhg_phy_setup(hw); 1437 if (ret_val) { 1438 e_dbg("gbe_dhg_phy_setup failed!\n"); 1439 return ret_val; 1440 } 1441 } 1442 1443 if (hw->autoneg) { 1444 /* Setup autoneg and flow control advertisement 1445 * and perform autonegotiation 1446 */ 1447 ret_val = e1000_copper_link_autoneg(hw); 1448 if (ret_val) 1449 return ret_val; 1450 } else { 1451 /* PHY will be set to 10H, 10F, 100H,or 100F 1452 * depending on value from forced_speed_duplex. 1453 */ 1454 e_dbg("Forcing speed and duplex\n"); 1455 ret_val = e1000_phy_force_speed_duplex(hw); 1456 if (ret_val) { 1457 e_dbg("Error Forcing Speed and Duplex\n"); 1458 return ret_val; 1459 } 1460 } 1461 1462 /* Check link status. Wait up to 100 microseconds for link to become 1463 * valid. 1464 */ 1465 for (i = 0; i < 10; i++) { 1466 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 1467 if (ret_val) 1468 return ret_val; 1469 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 1470 if (ret_val) 1471 return ret_val; 1472 1473 if (phy_data & MII_SR_LINK_STATUS) { 1474 /* Config the MAC and PHY after link is up */ 1475 ret_val = e1000_copper_link_postconfig(hw); 1476 if (ret_val) 1477 return ret_val; 1478 1479 e_dbg("Valid link established!!!\n"); 1480 return E1000_SUCCESS; 1481 } 1482 udelay(10); 1483 } 1484 1485 e_dbg("Unable to establish link!!!\n"); 1486 return E1000_SUCCESS; 1487} 1488 1489/** 1490 * e1000_phy_setup_autoneg - phy settings 1491 * @hw: Struct containing variables accessed by shared code 1492 * 1493 * Configures PHY autoneg and flow control advertisement settings 1494 */ 1495s32 e1000_phy_setup_autoneg(struct e1000_hw *hw) 1496{ 1497 s32 ret_val; 1498 u16 mii_autoneg_adv_reg; 1499 u16 mii_1000t_ctrl_reg; 1500 1501 /* Read the MII Auto-Neg Advertisement Register (Address 4). */ 1502 ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_ADV, &mii_autoneg_adv_reg); 1503 if (ret_val) 1504 return ret_val; 1505 1506 /* Read the MII 1000Base-T Control Register (Address 9). */ 1507 ret_val = e1000_read_phy_reg(hw, PHY_1000T_CTRL, &mii_1000t_ctrl_reg); 1508 if (ret_val) 1509 return ret_val; 1510 else if (hw->phy_type == e1000_phy_8201) 1511 mii_1000t_ctrl_reg &= ~REG9_SPEED_MASK; 1512 1513 /* Need to parse both autoneg_advertised and fc and set up 1514 * the appropriate PHY registers. First we will parse for 1515 * autoneg_advertised software override. Since we can advertise 1516 * a plethora of combinations, we need to check each bit 1517 * individually. 1518 */ 1519 1520 /* First we clear all the 10/100 mb speed bits in the Auto-Neg 1521 * Advertisement Register (Address 4) and the 1000 mb speed bits in 1522 * the 1000Base-T Control Register (Address 9). 1523 */ 1524 mii_autoneg_adv_reg &= ~REG4_SPEED_MASK; 1525 mii_1000t_ctrl_reg &= ~REG9_SPEED_MASK; 1526 1527 e_dbg("autoneg_advertised %x\n", hw->autoneg_advertised); 1528 1529 /* Do we want to advertise 10 Mb Half Duplex? */ 1530 if (hw->autoneg_advertised & ADVERTISE_10_HALF) { 1531 e_dbg("Advertise 10mb Half duplex\n"); 1532 mii_autoneg_adv_reg |= NWAY_AR_10T_HD_CAPS; 1533 } 1534 1535 /* Do we want to advertise 10 Mb Full Duplex? */ 1536 if (hw->autoneg_advertised & ADVERTISE_10_FULL) { 1537 e_dbg("Advertise 10mb Full duplex\n"); 1538 mii_autoneg_adv_reg |= NWAY_AR_10T_FD_CAPS; 1539 } 1540 1541 /* Do we want to advertise 100 Mb Half Duplex? */ 1542 if (hw->autoneg_advertised & ADVERTISE_100_HALF) { 1543 e_dbg("Advertise 100mb Half duplex\n"); 1544 mii_autoneg_adv_reg |= NWAY_AR_100TX_HD_CAPS; 1545 } 1546 1547 /* Do we want to advertise 100 Mb Full Duplex? */ 1548 if (hw->autoneg_advertised & ADVERTISE_100_FULL) { 1549 e_dbg("Advertise 100mb Full duplex\n"); 1550 mii_autoneg_adv_reg |= NWAY_AR_100TX_FD_CAPS; 1551 } 1552 1553 /* We do not allow the Phy to advertise 1000 Mb Half Duplex */ 1554 if (hw->autoneg_advertised & ADVERTISE_1000_HALF) { 1555 e_dbg 1556 ("Advertise 1000mb Half duplex requested, request denied!\n"); 1557 } 1558 1559 /* Do we want to advertise 1000 Mb Full Duplex? */ 1560 if (hw->autoneg_advertised & ADVERTISE_1000_FULL) { 1561 e_dbg("Advertise 1000mb Full duplex\n"); 1562 mii_1000t_ctrl_reg |= CR_1000T_FD_CAPS; 1563 } 1564 1565 /* Check for a software override of the flow control settings, and 1566 * setup the PHY advertisement registers accordingly. If 1567 * auto-negotiation is enabled, then software will have to set the 1568 * "PAUSE" bits to the correct value in the Auto-Negotiation 1569 * Advertisement Register (PHY_AUTONEG_ADV) and re-start 1570 * auto-negotiation. 1571 * 1572 * The possible values of the "fc" parameter are: 1573 * 0: Flow control is completely disabled 1574 * 1: Rx flow control is enabled (we can receive pause frames 1575 * but not send pause frames). 1576 * 2: Tx flow control is enabled (we can send pause frames 1577 * but we do not support receiving pause frames). 1578 * 3: Both Rx and TX flow control (symmetric) are enabled. 1579 * other: No software override. The flow control configuration 1580 * in the EEPROM is used. 1581 */ 1582 switch (hw->fc) { 1583 case E1000_FC_NONE: /* 0 */ 1584 /* Flow control (RX & TX) is completely disabled by a 1585 * software over-ride. 1586 */ 1587 mii_autoneg_adv_reg &= ~(NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); 1588 break; 1589 case E1000_FC_RX_PAUSE: /* 1 */ 1590 /* RX Flow control is enabled, and TX Flow control is 1591 * disabled, by a software over-ride. 1592 */ 1593 /* Since there really isn't a way to advertise that we are 1594 * capable of RX Pause ONLY, we will advertise that we 1595 * support both symmetric and asymmetric RX PAUSE. Later 1596 * (in e1000_config_fc_after_link_up) we will disable the 1597 * hw's ability to send PAUSE frames. 1598 */ 1599 mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); 1600 break; 1601 case E1000_FC_TX_PAUSE: /* 2 */ 1602 /* TX Flow control is enabled, and RX Flow control is 1603 * disabled, by a software over-ride. 1604 */ 1605 mii_autoneg_adv_reg |= NWAY_AR_ASM_DIR; 1606 mii_autoneg_adv_reg &= ~NWAY_AR_PAUSE; 1607 break; 1608 case E1000_FC_FULL: /* 3 */ 1609 /* Flow control (both RX and TX) is enabled by a software 1610 * over-ride. 1611 */ 1612 mii_autoneg_adv_reg |= (NWAY_AR_ASM_DIR | NWAY_AR_PAUSE); 1613 break; 1614 default: 1615 e_dbg("Flow control param set incorrectly\n"); 1616 return -E1000_ERR_CONFIG; 1617 } 1618 1619 ret_val = e1000_write_phy_reg(hw, PHY_AUTONEG_ADV, mii_autoneg_adv_reg); 1620 if (ret_val) 1621 return ret_val; 1622 1623 e_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg); 1624 1625 if (hw->phy_type == e1000_phy_8201) { 1626 mii_1000t_ctrl_reg = 0; 1627 } else { 1628 ret_val = e1000_write_phy_reg(hw, PHY_1000T_CTRL, 1629 mii_1000t_ctrl_reg); 1630 if (ret_val) 1631 return ret_val; 1632 } 1633 1634 return E1000_SUCCESS; 1635} 1636 1637/** 1638 * e1000_phy_force_speed_duplex - force link settings 1639 * @hw: Struct containing variables accessed by shared code 1640 * 1641 * Force PHY speed and duplex settings to hw->forced_speed_duplex 1642 */ 1643static s32 e1000_phy_force_speed_duplex(struct e1000_hw *hw) 1644{ 1645 u32 ctrl; 1646 s32 ret_val; 1647 u16 mii_ctrl_reg; 1648 u16 mii_status_reg; 1649 u16 phy_data; 1650 u16 i; 1651 1652 /* Turn off Flow control if we are forcing speed and duplex. */ 1653 hw->fc = E1000_FC_NONE; 1654 1655 e_dbg("hw->fc = %d\n", hw->fc); 1656 1657 /* Read the Device Control Register. */ 1658 ctrl = er32(CTRL); 1659 1660 /* Set the bits to Force Speed and Duplex in the Device Ctrl Reg. */ 1661 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX); 1662 ctrl &= ~(DEVICE_SPEED_MASK); 1663 1664 /* Clear the Auto Speed Detect Enable bit. */ 1665 ctrl &= ~E1000_CTRL_ASDE; 1666 1667 /* Read the MII Control Register. */ 1668 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &mii_ctrl_reg); 1669 if (ret_val) 1670 return ret_val; 1671 1672 /* We need to disable autoneg in order to force link and duplex. */ 1673 1674 mii_ctrl_reg &= ~MII_CR_AUTO_NEG_EN; 1675 1676 /* Are we forcing Full or Half Duplex? */ 1677 if (hw->forced_speed_duplex == e1000_100_full || 1678 hw->forced_speed_duplex == e1000_10_full) { 1679 /* We want to force full duplex so we SET the full duplex bits 1680 * in the Device and MII Control Registers. 1681 */ 1682 ctrl |= E1000_CTRL_FD; 1683 mii_ctrl_reg |= MII_CR_FULL_DUPLEX; 1684 e_dbg("Full Duplex\n"); 1685 } else { 1686 /* We want to force half duplex so we CLEAR the full duplex bits 1687 * in the Device and MII Control Registers. 1688 */ 1689 ctrl &= ~E1000_CTRL_FD; 1690 mii_ctrl_reg &= ~MII_CR_FULL_DUPLEX; 1691 e_dbg("Half Duplex\n"); 1692 } 1693 1694 /* Are we forcing 100Mbps??? */ 1695 if (hw->forced_speed_duplex == e1000_100_full || 1696 hw->forced_speed_duplex == e1000_100_half) { 1697 /* Set the 100Mb bit and turn off the 1000Mb and 10Mb bits. */ 1698 ctrl |= E1000_CTRL_SPD_100; 1699 mii_ctrl_reg |= MII_CR_SPEED_100; 1700 mii_ctrl_reg &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_10); 1701 e_dbg("Forcing 100mb "); 1702 } else { 1703 /* Set the 10Mb bit and turn off the 1000Mb and 100Mb bits. */ 1704 ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100); 1705 mii_ctrl_reg |= MII_CR_SPEED_10; 1706 mii_ctrl_reg &= ~(MII_CR_SPEED_1000 | MII_CR_SPEED_100); 1707 e_dbg("Forcing 10mb "); 1708 } 1709 1710 e1000_config_collision_dist(hw); 1711 1712 /* Write the configured values back to the Device Control Reg. */ 1713 ew32(CTRL, ctrl); 1714 1715 if (hw->phy_type == e1000_phy_m88) { 1716 ret_val = 1717 e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1718 if (ret_val) 1719 return ret_val; 1720 1721 /* Clear Auto-Crossover to force MDI manually. M88E1000 requires 1722 * MDI forced whenever speed are duplex are forced. 1723 */ 1724 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE; 1725 ret_val = 1726 e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 1727 if (ret_val) 1728 return ret_val; 1729 1730 e_dbg("M88E1000 PSCR: %x\n", phy_data); 1731 1732 /* Need to reset the PHY or these changes will be ignored */ 1733 mii_ctrl_reg |= MII_CR_RESET; 1734 1735 /* Disable MDI-X support for 10/100 */ 1736 } else { 1737 /* Clear Auto-Crossover to force MDI manually. IGP requires MDI 1738 * forced whenever speed or duplex are forced. 1739 */ 1740 ret_val = 1741 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data); 1742 if (ret_val) 1743 return ret_val; 1744 1745 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX; 1746 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX; 1747 1748 ret_val = 1749 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CTRL, phy_data); 1750 if (ret_val) 1751 return ret_val; 1752 } 1753 1754 /* Write back the modified PHY MII control register. */ 1755 ret_val = e1000_write_phy_reg(hw, PHY_CTRL, mii_ctrl_reg); 1756 if (ret_val) 1757 return ret_val; 1758 1759 udelay(1); 1760 1761 /* The wait_autoneg_complete flag may be a little misleading here. 1762 * Since we are forcing speed and duplex, Auto-Neg is not enabled. 1763 * But we do want to delay for a period while forcing only so we 1764 * don't generate false No Link messages. So we will wait here 1765 * only if the user has set wait_autoneg_complete to 1, which is 1766 * the default. 1767 */ 1768 if (hw->wait_autoneg_complete) { 1769 /* We will wait for autoneg to complete. */ 1770 e_dbg("Waiting for forced speed/duplex link.\n"); 1771 mii_status_reg = 0; 1772 1773 /* Wait for autoneg to complete or 4.5 seconds to expire */ 1774 for (i = PHY_FORCE_TIME; i > 0; i--) { 1775 /* Read the MII Status Register and wait for Auto-Neg 1776 * Complete bit to be set. 1777 */ 1778 ret_val = 1779 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 1780 if (ret_val) 1781 return ret_val; 1782 1783 ret_val = 1784 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 1785 if (ret_val) 1786 return ret_val; 1787 1788 if (mii_status_reg & MII_SR_LINK_STATUS) 1789 break; 1790 msleep(100); 1791 } 1792 if ((i == 0) && (hw->phy_type == e1000_phy_m88)) { 1793 /* We didn't get link. Reset the DSP and wait again 1794 * for link. 1795 */ 1796 ret_val = e1000_phy_reset_dsp(hw); 1797 if (ret_val) { 1798 e_dbg("Error Resetting PHY DSP\n"); 1799 return ret_val; 1800 } 1801 } 1802 /* This loop will early-out if the link condition has been 1803 * met 1804 */ 1805 for (i = PHY_FORCE_TIME; i > 0; i--) { 1806 if (mii_status_reg & MII_SR_LINK_STATUS) 1807 break; 1808 msleep(100); 1809 /* Read the MII Status Register and wait for Auto-Neg 1810 * Complete bit to be set. 1811 */ 1812 ret_val = 1813 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 1814 if (ret_val) 1815 return ret_val; 1816 1817 ret_val = 1818 e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 1819 if (ret_val) 1820 return ret_val; 1821 } 1822 } 1823 1824 if (hw->phy_type == e1000_phy_m88) { 1825 /* Because we reset the PHY above, we need to re-force TX_CLK in 1826 * the Extended PHY Specific Control Register to 25MHz clock. 1827 * This value defaults back to a 2.5MHz clock when the PHY is 1828 * reset. 1829 */ 1830 ret_val = 1831 e1000_read_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL, 1832 &phy_data); 1833 if (ret_val) 1834 return ret_val; 1835 1836 phy_data |= M88E1000_EPSCR_TX_CLK_25; 1837 ret_val = 1838 e1000_write_phy_reg(hw, M88E1000_EXT_PHY_SPEC_CTRL, 1839 phy_data); 1840 if (ret_val) 1841 return ret_val; 1842 1843 /* In addition, because of the s/w reset above, we need to 1844 * enable CRS on Tx. This must be set for both full and half 1845 * duplex operation. 1846 */ 1847 ret_val = 1848 e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 1849 if (ret_val) 1850 return ret_val; 1851 1852 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX; 1853 ret_val = 1854 e1000_write_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, phy_data); 1855 if (ret_val) 1856 return ret_val; 1857 1858 if ((hw->mac_type == e1000_82544 || 1859 hw->mac_type == e1000_82543) && 1860 (!hw->autoneg) && 1861 (hw->forced_speed_duplex == e1000_10_full || 1862 hw->forced_speed_duplex == e1000_10_half)) { 1863 ret_val = e1000_polarity_reversal_workaround(hw); 1864 if (ret_val) 1865 return ret_val; 1866 } 1867 } 1868 return E1000_SUCCESS; 1869} 1870 1871/** 1872 * e1000_config_collision_dist - set collision distance register 1873 * @hw: Struct containing variables accessed by shared code 1874 * 1875 * Sets the collision distance in the Transmit Control register. 1876 * Link should have been established previously. Reads the speed and duplex 1877 * information from the Device Status register. 1878 */ 1879void e1000_config_collision_dist(struct e1000_hw *hw) 1880{ 1881 u32 tctl, coll_dist; 1882 1883 if (hw->mac_type < e1000_82543) 1884 coll_dist = E1000_COLLISION_DISTANCE_82542; 1885 else 1886 coll_dist = E1000_COLLISION_DISTANCE; 1887 1888 tctl = er32(TCTL); 1889 1890 tctl &= ~E1000_TCTL_COLD; 1891 tctl |= coll_dist << E1000_COLD_SHIFT; 1892 1893 ew32(TCTL, tctl); 1894 E1000_WRITE_FLUSH(); 1895} 1896 1897/** 1898 * e1000_config_mac_to_phy - sync phy and mac settings 1899 * @hw: Struct containing variables accessed by shared code 1900 * 1901 * Sets MAC speed and duplex settings to reflect the those in the PHY 1902 * The contents of the PHY register containing the needed information need to 1903 * be passed in. 1904 */ 1905static s32 e1000_config_mac_to_phy(struct e1000_hw *hw) 1906{ 1907 u32 ctrl; 1908 s32 ret_val; 1909 u16 phy_data; 1910 1911 /* 82544 or newer MAC, Auto Speed Detection takes care of 1912 * MAC speed/duplex configuration. 1913 */ 1914 if ((hw->mac_type >= e1000_82544) && (hw->mac_type != e1000_ce4100)) 1915 return E1000_SUCCESS; 1916 1917 /* Read the Device Control Register and set the bits to Force Speed 1918 * and Duplex. 1919 */ 1920 ctrl = er32(CTRL); 1921 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX); 1922 ctrl &= ~(E1000_CTRL_SPD_SEL | E1000_CTRL_ILOS); 1923 1924 switch (hw->phy_type) { 1925 case e1000_phy_8201: 1926 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data); 1927 if (ret_val) 1928 return ret_val; 1929 1930 if (phy_data & RTL_PHY_CTRL_FD) 1931 ctrl |= E1000_CTRL_FD; 1932 else 1933 ctrl &= ~E1000_CTRL_FD; 1934 1935 if (phy_data & RTL_PHY_CTRL_SPD_100) 1936 ctrl |= E1000_CTRL_SPD_100; 1937 else 1938 ctrl |= E1000_CTRL_SPD_10; 1939 1940 e1000_config_collision_dist(hw); 1941 break; 1942 default: 1943 /* Set up duplex in the Device Control and Transmit Control 1944 * registers depending on negotiated values. 1945 */ 1946 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, 1947 &phy_data); 1948 if (ret_val) 1949 return ret_val; 1950 1951 if (phy_data & M88E1000_PSSR_DPLX) 1952 ctrl |= E1000_CTRL_FD; 1953 else 1954 ctrl &= ~E1000_CTRL_FD; 1955 1956 e1000_config_collision_dist(hw); 1957 1958 /* Set up speed in the Device Control register depending on 1959 * negotiated values. 1960 */ 1961 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) 1962 ctrl |= E1000_CTRL_SPD_1000; 1963 else if ((phy_data & M88E1000_PSSR_SPEED) == 1964 M88E1000_PSSR_100MBS) 1965 ctrl |= E1000_CTRL_SPD_100; 1966 } 1967 1968 /* Write the configured values back to the Device Control Reg. */ 1969 ew32(CTRL, ctrl); 1970 return E1000_SUCCESS; 1971} 1972 1973/** 1974 * e1000_force_mac_fc - force flow control settings 1975 * @hw: Struct containing variables accessed by shared code 1976 * 1977 * Forces the MAC's flow control settings. 1978 * Sets the TFCE and RFCE bits in the device control register to reflect 1979 * the adapter settings. TFCE and RFCE need to be explicitly set by 1980 * software when a Copper PHY is used because autonegotiation is managed 1981 * by the PHY rather than the MAC. Software must also configure these 1982 * bits when link is forced on a fiber connection. 1983 */ 1984s32 e1000_force_mac_fc(struct e1000_hw *hw) 1985{ 1986 u32 ctrl; 1987 1988 /* Get the current configuration of the Device Control Register */ 1989 ctrl = er32(CTRL); 1990 1991 /* Because we didn't get link via the internal auto-negotiation 1992 * mechanism (we either forced link or we got link via PHY 1993 * auto-neg), we have to manually enable/disable transmit an 1994 * receive flow control. 1995 * 1996 * The "Case" statement below enables/disable flow control 1997 * according to the "hw->fc" parameter. 1998 * 1999 * The possible values of the "fc" parameter are: 2000 * 0: Flow control is completely disabled 2001 * 1: Rx flow control is enabled (we can receive pause 2002 * frames but not send pause frames). 2003 * 2: Tx flow control is enabled (we can send pause frames 2004 * but we do not receive pause frames). 2005 * 3: Both Rx and TX flow control (symmetric) is enabled. 2006 * other: No other values should be possible at this point. 2007 */ 2008 2009 switch (hw->fc) { 2010 case E1000_FC_NONE: 2011 ctrl &= (~(E1000_CTRL_TFCE | E1000_CTRL_RFCE)); 2012 break; 2013 case E1000_FC_RX_PAUSE: 2014 ctrl &= (~E1000_CTRL_TFCE); 2015 ctrl |= E1000_CTRL_RFCE; 2016 break; 2017 case E1000_FC_TX_PAUSE: 2018 ctrl &= (~E1000_CTRL_RFCE); 2019 ctrl |= E1000_CTRL_TFCE; 2020 break; 2021 case E1000_FC_FULL: 2022 ctrl |= (E1000_CTRL_TFCE | E1000_CTRL_RFCE); 2023 break; 2024 default: 2025 e_dbg("Flow control param set incorrectly\n"); 2026 return -E1000_ERR_CONFIG; 2027 } 2028 2029 /* Disable TX Flow Control for 82542 (rev 2.0) */ 2030 if (hw->mac_type == e1000_82542_rev2_0) 2031 ctrl &= (~E1000_CTRL_TFCE); 2032 2033 ew32(CTRL, ctrl); 2034 return E1000_SUCCESS; 2035} 2036 2037/** 2038 * e1000_config_fc_after_link_up - configure flow control after autoneg 2039 * @hw: Struct containing variables accessed by shared code 2040 * 2041 * Configures flow control settings after link is established 2042 * Should be called immediately after a valid link has been established. 2043 * Forces MAC flow control settings if link was forced. When in MII/GMII mode 2044 * and autonegotiation is enabled, the MAC flow control settings will be set 2045 * based on the flow control negotiated by the PHY. In TBI mode, the TFCE 2046 * and RFCE bits will be automatically set to the negotiated flow control mode. 2047 */ 2048static s32 e1000_config_fc_after_link_up(struct e1000_hw *hw) 2049{ 2050 s32 ret_val; 2051 u16 mii_status_reg; 2052 u16 mii_nway_adv_reg; 2053 u16 mii_nway_lp_ability_reg; 2054 u16 speed; 2055 u16 duplex; 2056 2057 /* Check for the case where we have fiber media and auto-neg failed 2058 * so we had to force link. In this case, we need to force the 2059 * configuration of the MAC to match the "fc" parameter. 2060 */ 2061 if (((hw->media_type == e1000_media_type_fiber) && 2062 (hw->autoneg_failed)) || 2063 ((hw->media_type == e1000_media_type_internal_serdes) && 2064 (hw->autoneg_failed)) || 2065 ((hw->media_type == e1000_media_type_copper) && 2066 (!hw->autoneg))) { 2067 ret_val = e1000_force_mac_fc(hw); 2068 if (ret_val) { 2069 e_dbg("Error forcing flow control settings\n"); 2070 return ret_val; 2071 } 2072 } 2073 2074 /* Check for the case where we have copper media and auto-neg is 2075 * enabled. In this case, we need to check and see if Auto-Neg 2076 * has completed, and if so, how the PHY and link partner has 2077 * flow control configured. 2078 */ 2079 if ((hw->media_type == e1000_media_type_copper) && hw->autoneg) { 2080 /* Read the MII Status Register and check to see if AutoNeg 2081 * has completed. We read this twice because this reg has 2082 * some "sticky" (latched) bits. 2083 */ 2084 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 2085 if (ret_val) 2086 return ret_val; 2087 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 2088 if (ret_val) 2089 return ret_val; 2090 2091 if (mii_status_reg & MII_SR_AUTONEG_COMPLETE) { 2092 /* The AutoNeg process has completed, so we now need to 2093 * read both the Auto Negotiation Advertisement Register 2094 * (Address 4) and the Auto_Negotiation Base Page 2095 * Ability Register (Address 5) to determine how flow 2096 * control was negotiated. 2097 */ 2098 ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_ADV, 2099 &mii_nway_adv_reg); 2100 if (ret_val) 2101 return ret_val; 2102 ret_val = e1000_read_phy_reg(hw, PHY_LP_ABILITY, 2103 &mii_nway_lp_ability_reg); 2104 if (ret_val) 2105 return ret_val; 2106 2107 /* Two bits in the Auto Negotiation Advertisement 2108 * Register (Address 4) and two bits in the Auto 2109 * Negotiation Base Page Ability Register (Address 5) 2110 * determine flow control for both the PHY and the link 2111 * partner. The following table, taken out of the IEEE 2112 * 802.3ab/D6.0 dated March 25, 1999, describes these 2113 * PAUSE resolution bits and how flow control is 2114 * determined based upon these settings. 2115 * NOTE: DC = Don't Care 2116 * 2117 * LOCAL DEVICE | LINK PARTNER 2118 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | NIC Resolution 2119 *-------|---------|-------|---------|------------------ 2120 * 0 | 0 | DC | DC | E1000_FC_NONE 2121 * 0 | 1 | 0 | DC | E1000_FC_NONE 2122 * 0 | 1 | 1 | 0 | E1000_FC_NONE 2123 * 0 | 1 | 1 | 1 | E1000_FC_TX_PAUSE 2124 * 1 | 0 | 0 | DC | E1000_FC_NONE 2125 * 1 | DC | 1 | DC | E1000_FC_FULL 2126 * 1 | 1 | 0 | 0 | E1000_FC_NONE 2127 * 1 | 1 | 0 | 1 | E1000_FC_RX_PAUSE 2128 * 2129 */ 2130 /* Are both PAUSE bits set to 1? If so, this implies 2131 * Symmetric Flow Control is enabled at both ends. The 2132 * ASM_DIR bits are irrelevant per the spec. 2133 * 2134 * For Symmetric Flow Control: 2135 * 2136 * LOCAL DEVICE | LINK PARTNER 2137 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result 2138 *-------|---------|-------|---------|------------------ 2139 * 1 | DC | 1 | DC | E1000_FC_FULL 2140 * 2141 */ 2142 if ((mii_nway_adv_reg & NWAY_AR_PAUSE) && 2143 (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE)) { 2144 /* Now we need to check if the user selected Rx 2145 * ONLY of pause frames. In this case, we had 2146 * to advertise FULL flow control because we 2147 * could not advertise Rx ONLY. Hence, we must 2148 * now check to see if we need to turn OFF the 2149 * TRANSMISSION of PAUSE frames. 2150 */ 2151 if (hw->original_fc == E1000_FC_FULL) { 2152 hw->fc = E1000_FC_FULL; 2153 e_dbg("Flow Control = FULL.\n"); 2154 } else { 2155 hw->fc = E1000_FC_RX_PAUSE; 2156 e_dbg 2157 ("Flow Control = RX PAUSE frames only.\n"); 2158 } 2159 } 2160 /* For receiving PAUSE frames ONLY. 2161 * 2162 * LOCAL DEVICE | LINK PARTNER 2163 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result 2164 *-------|---------|-------|---------|------------------ 2165 * 0 | 1 | 1 | 1 | E1000_FC_TX_PAUSE 2166 * 2167 */ 2168 else if (!(mii_nway_adv_reg & NWAY_AR_PAUSE) && 2169 (mii_nway_adv_reg & NWAY_AR_ASM_DIR) && 2170 (mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) && 2171 (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) { 2172 hw->fc = E1000_FC_TX_PAUSE; 2173 e_dbg 2174 ("Flow Control = TX PAUSE frames only.\n"); 2175 } 2176 /* For transmitting PAUSE frames ONLY. 2177 * 2178 * LOCAL DEVICE | LINK PARTNER 2179 * PAUSE | ASM_DIR | PAUSE | ASM_DIR | Result 2180 *-------|---------|-------|---------|------------------ 2181 * 1 | 1 | 0 | 1 | E1000_FC_RX_PAUSE 2182 * 2183 */ 2184 else if ((mii_nway_adv_reg & NWAY_AR_PAUSE) && 2185 (mii_nway_adv_reg & NWAY_AR_ASM_DIR) && 2186 !(mii_nway_lp_ability_reg & NWAY_LPAR_PAUSE) && 2187 (mii_nway_lp_ability_reg & NWAY_LPAR_ASM_DIR)) { 2188 hw->fc = E1000_FC_RX_PAUSE; 2189 e_dbg 2190 ("Flow Control = RX PAUSE frames only.\n"); 2191 } 2192 /* Per the IEEE spec, at this point flow control should 2193 * be disabled. However, we want to consider that we 2194 * could be connected to a legacy switch that doesn't 2195 * advertise desired flow control, but can be forced on 2196 * the link partner. So if we advertised no flow 2197 * control, that is what we will resolve to. If we 2198 * advertised some kind of receive capability (Rx Pause 2199 * Only or Full Flow Control) and the link partner 2200 * advertised none, we will configure ourselves to 2201 * enable Rx Flow Control only. We can do this safely 2202 * for two reasons: If the link partner really 2203 * didn't want flow control enabled, and we enable Rx, 2204 * no harm done since we won't be receiving any PAUSE 2205 * frames anyway. If the intent on the link partner was 2206 * to have flow control enabled, then by us enabling Rx 2207 * only, we can at least receive pause frames and 2208 * process them. This is a good idea because in most 2209 * cases, since we are predominantly a server NIC, more 2210 * times than not we will be asked to delay transmission 2211 * of packets than asking our link partner to pause 2212 * transmission of frames. 2213 */ 2214 else if ((hw->original_fc == E1000_FC_NONE || 2215 hw->original_fc == E1000_FC_TX_PAUSE) || 2216 hw->fc_strict_ieee) { 2217 hw->fc = E1000_FC_NONE; 2218 e_dbg("Flow Control = NONE.\n"); 2219 } else { 2220 hw->fc = E1000_FC_RX_PAUSE; 2221 e_dbg 2222 ("Flow Control = RX PAUSE frames only.\n"); 2223 } 2224 2225 /* Now we need to do one last check... If we auto- 2226 * negotiated to HALF DUPLEX, flow control should not be 2227 * enabled per IEEE 802.3 spec. 2228 */ 2229 ret_val = 2230 e1000_get_speed_and_duplex(hw, &speed, &duplex); 2231 if (ret_val) { 2232 e_dbg 2233 ("Error getting link speed and duplex\n"); 2234 return ret_val; 2235 } 2236 2237 if (duplex == HALF_DUPLEX) 2238 hw->fc = E1000_FC_NONE; 2239 2240 /* Now we call a subroutine to actually force the MAC 2241 * controller to use the correct flow control settings. 2242 */ 2243 ret_val = e1000_force_mac_fc(hw); 2244 if (ret_val) { 2245 e_dbg 2246 ("Error forcing flow control settings\n"); 2247 return ret_val; 2248 } 2249 } else { 2250 e_dbg 2251 ("Copper PHY and Auto Neg has not completed.\n"); 2252 } 2253 } 2254 return E1000_SUCCESS; 2255} 2256 2257/** 2258 * e1000_check_for_serdes_link_generic - Check for link (Serdes) 2259 * @hw: pointer to the HW structure 2260 * 2261 * Checks for link up on the hardware. If link is not up and we have 2262 * a signal, then we need to force link up. 2263 */ 2264static s32 e1000_check_for_serdes_link_generic(struct e1000_hw *hw) 2265{ 2266 u32 rxcw; 2267 u32 ctrl; 2268 u32 status; 2269 s32 ret_val = E1000_SUCCESS; 2270 2271 ctrl = er32(CTRL); 2272 status = er32(STATUS); 2273 rxcw = er32(RXCW); 2274 2275 /* If we don't have link (auto-negotiation failed or link partner 2276 * cannot auto-negotiate), and our link partner is not trying to 2277 * auto-negotiate with us (we are receiving idles or data), 2278 * we need to force link up. We also need to give auto-negotiation 2279 * time to complete. 2280 */ 2281 /* (ctrl & E1000_CTRL_SWDPIN1) == 1 == have signal */ 2282 if ((!(status & E1000_STATUS_LU)) && (!(rxcw & E1000_RXCW_C))) { 2283 if (hw->autoneg_failed == 0) { 2284 hw->autoneg_failed = 1; 2285 goto out; 2286 } 2287 e_dbg("NOT RXing /C/, disable AutoNeg and force link.\n"); 2288 2289 /* Disable auto-negotiation in the TXCW register */ 2290 ew32(TXCW, (hw->txcw & ~E1000_TXCW_ANE)); 2291 2292 /* Force link-up and also force full-duplex. */ 2293 ctrl = er32(CTRL); 2294 ctrl |= (E1000_CTRL_SLU | E1000_CTRL_FD); 2295 ew32(CTRL, ctrl); 2296 2297 /* Configure Flow Control after forcing link up. */ 2298 ret_val = e1000_config_fc_after_link_up(hw); 2299 if (ret_val) { 2300 e_dbg("Error configuring flow control\n"); 2301 goto out; 2302 } 2303 } else if ((ctrl & E1000_CTRL_SLU) && (rxcw & E1000_RXCW_C)) { 2304 /* If we are forcing link and we are receiving /C/ ordered 2305 * sets, re-enable auto-negotiation in the TXCW register 2306 * and disable forced link in the Device Control register 2307 * in an attempt to auto-negotiate with our link partner. 2308 */ 2309 e_dbg("RXing /C/, enable AutoNeg and stop forcing link.\n"); 2310 ew32(TXCW, hw->txcw); 2311 ew32(CTRL, (ctrl & ~E1000_CTRL_SLU)); 2312 2313 hw->serdes_has_link = true; 2314 } else if (!(E1000_TXCW_ANE & er32(TXCW))) { 2315 /* If we force link for non-auto-negotiation switch, check 2316 * link status based on MAC synchronization for internal 2317 * serdes media type. 2318 */ 2319 /* SYNCH bit and IV bit are sticky. */ 2320 udelay(10); 2321 rxcw = er32(RXCW); 2322 if (rxcw & E1000_RXCW_SYNCH) { 2323 if (!(rxcw & E1000_RXCW_IV)) { 2324 hw->serdes_has_link = true; 2325 e_dbg("SERDES: Link up - forced.\n"); 2326 } 2327 } else { 2328 hw->serdes_has_link = false; 2329 e_dbg("SERDES: Link down - force failed.\n"); 2330 } 2331 } 2332 2333 if (E1000_TXCW_ANE & er32(TXCW)) { 2334 status = er32(STATUS); 2335 if (status & E1000_STATUS_LU) { 2336 /* SYNCH bit and IV bit are sticky, so reread rxcw. */ 2337 udelay(10); 2338 rxcw = er32(RXCW); 2339 if (rxcw & E1000_RXCW_SYNCH) { 2340 if (!(rxcw & E1000_RXCW_IV)) { 2341 hw->serdes_has_link = true; 2342 e_dbg("SERDES: Link up - autoneg " 2343 "completed successfully.\n"); 2344 } else { 2345 hw->serdes_has_link = false; 2346 e_dbg("SERDES: Link down - invalid" 2347 "codewords detected in autoneg.\n"); 2348 } 2349 } else { 2350 hw->serdes_has_link = false; 2351 e_dbg("SERDES: Link down - no sync.\n"); 2352 } 2353 } else { 2354 hw->serdes_has_link = false; 2355 e_dbg("SERDES: Link down - autoneg failed\n"); 2356 } 2357 } 2358 2359 out: 2360 return ret_val; 2361} 2362 2363/** 2364 * e1000_check_for_link 2365 * @hw: Struct containing variables accessed by shared code 2366 * 2367 * Checks to see if the link status of the hardware has changed. 2368 * Called by any function that needs to check the link status of the adapter. 2369 */ 2370s32 e1000_check_for_link(struct e1000_hw *hw) 2371{ 2372 u32 status; 2373 u32 rctl; 2374 u32 icr; 2375 s32 ret_val; 2376 u16 phy_data; 2377 2378 er32(CTRL); 2379 status = er32(STATUS); 2380 2381 /* On adapters with a MAC newer than 82544, SW Definable pin 1 will be 2382 * set when the optics detect a signal. On older adapters, it will be 2383 * cleared when there is a signal. This applies to fiber media only. 2384 */ 2385 if ((hw->media_type == e1000_media_type_fiber) || 2386 (hw->media_type == e1000_media_type_internal_serdes)) { 2387 er32(RXCW); 2388 2389 if (hw->media_type == e1000_media_type_fiber) { 2390 if (status & E1000_STATUS_LU) 2391 hw->get_link_status = false; 2392 } 2393 } 2394 2395 /* If we have a copper PHY then we only want to go out to the PHY 2396 * registers to see if Auto-Neg has completed and/or if our link 2397 * status has changed. The get_link_status flag will be set if we 2398 * receive a Link Status Change interrupt or we have Rx Sequence 2399 * Errors. 2400 */ 2401 if ((hw->media_type == e1000_media_type_copper) && hw->get_link_status) { 2402 /* First we want to see if the MII Status Register reports 2403 * link. If so, then we want to get the current speed/duplex 2404 * of the PHY. 2405 * Read the register twice since the link bit is sticky. 2406 */ 2407 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 2408 if (ret_val) 2409 return ret_val; 2410 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 2411 if (ret_val) 2412 return ret_val; 2413 2414 if (phy_data & MII_SR_LINK_STATUS) { 2415 hw->get_link_status = false; 2416 /* Check if there was DownShift, must be checked 2417 * immediately after link-up 2418 */ 2419 e1000_check_downshift(hw); 2420 2421 /* If we are on 82544 or 82543 silicon and speed/duplex 2422 * are forced to 10H or 10F, then we will implement the 2423 * polarity reversal workaround. We disable interrupts 2424 * first, and upon returning, place the devices 2425 * interrupt state to its previous value except for the 2426 * link status change interrupt which will 2427 * happen due to the execution of this workaround. 2428 */ 2429 2430 if ((hw->mac_type == e1000_82544 || 2431 hw->mac_type == e1000_82543) && 2432 (!hw->autoneg) && 2433 (hw->forced_speed_duplex == e1000_10_full || 2434 hw->forced_speed_duplex == e1000_10_half)) { 2435 ew32(IMC, 0xffffffff); 2436 ret_val = 2437 e1000_polarity_reversal_workaround(hw); 2438 icr = er32(ICR); 2439 ew32(ICS, (icr & ~E1000_ICS_LSC)); 2440 ew32(IMS, IMS_ENABLE_MASK); 2441 } 2442 2443 } else { 2444 /* No link detected */ 2445 e1000_config_dsp_after_link_change(hw, false); 2446 return 0; 2447 } 2448 2449 /* If we are forcing speed/duplex, then we simply return since 2450 * we have already determined whether we have link or not. 2451 */ 2452 if (!hw->autoneg) 2453 return -E1000_ERR_CONFIG; 2454 2455 /* optimize the dsp settings for the igp phy */ 2456 e1000_config_dsp_after_link_change(hw, true); 2457 2458 /* We have a M88E1000 PHY and Auto-Neg is enabled. If we 2459 * have Si on board that is 82544 or newer, Auto 2460 * Speed Detection takes care of MAC speed/duplex 2461 * configuration. So we only need to configure Collision 2462 * Distance in the MAC. Otherwise, we need to force 2463 * speed/duplex on the MAC to the current PHY speed/duplex 2464 * settings. 2465 */ 2466 if ((hw->mac_type >= e1000_82544) && 2467 (hw->mac_type != e1000_ce4100)) 2468 e1000_config_collision_dist(hw); 2469 else { 2470 ret_val = e1000_config_mac_to_phy(hw); 2471 if (ret_val) { 2472 e_dbg 2473 ("Error configuring MAC to PHY settings\n"); 2474 return ret_val; 2475 } 2476 } 2477 2478 /* Configure Flow Control now that Auto-Neg has completed. 2479 * First, we need to restore the desired flow control settings 2480 * because we may have had to re-autoneg with a different link 2481 * partner. 2482 */ 2483 ret_val = e1000_config_fc_after_link_up(hw); 2484 if (ret_val) { 2485 e_dbg("Error configuring flow control\n"); 2486 return ret_val; 2487 } 2488 2489 /* At this point we know that we are on copper and we have 2490 * auto-negotiated link. These are conditions for checking the 2491 * link partner capability register. We use the link speed to 2492 * determine if TBI compatibility needs to be turned on or off. 2493 * If the link is not at gigabit speed, then TBI compatibility 2494 * is not needed. If we are at gigabit speed, we turn on TBI 2495 * compatibility. 2496 */ 2497 if (hw->tbi_compatibility_en) { 2498 u16 speed, duplex; 2499 2500 ret_val = 2501 e1000_get_speed_and_duplex(hw, &speed, &duplex); 2502 2503 if (ret_val) { 2504 e_dbg 2505 ("Error getting link speed and duplex\n"); 2506 return ret_val; 2507 } 2508 if (speed != SPEED_1000) { 2509 /* If link speed is not set to gigabit speed, we 2510 * do not need to enable TBI compatibility. 2511 */ 2512 if (hw->tbi_compatibility_on) { 2513 /* If we previously were in the mode, 2514 * turn it off. 2515 */ 2516 rctl = er32(RCTL); 2517 rctl &= ~E1000_RCTL_SBP; 2518 ew32(RCTL, rctl); 2519 hw->tbi_compatibility_on = false; 2520 } 2521 } else { 2522 /* If TBI compatibility is was previously off, 2523 * turn it on. For compatibility with a TBI link 2524 * partner, we will store bad packets. Some 2525 * frames have an additional byte on the end and 2526 * will look like CRC errors to the hardware. 2527 */ 2528 if (!hw->tbi_compatibility_on) { 2529 hw->tbi_compatibility_on = true; 2530 rctl = er32(RCTL); 2531 rctl |= E1000_RCTL_SBP; 2532 ew32(RCTL, rctl); 2533 } 2534 } 2535 } 2536 } 2537 2538 if ((hw->media_type == e1000_media_type_fiber) || 2539 (hw->media_type == e1000_media_type_internal_serdes)) 2540 e1000_check_for_serdes_link_generic(hw); 2541 2542 return E1000_SUCCESS; 2543} 2544 2545/** 2546 * e1000_get_speed_and_duplex 2547 * @hw: Struct containing variables accessed by shared code 2548 * @speed: Speed of the connection 2549 * @duplex: Duplex setting of the connection 2550 * 2551 * Detects the current speed and duplex settings of the hardware. 2552 */ 2553s32 e1000_get_speed_and_duplex(struct e1000_hw *hw, u16 *speed, u16 *duplex) 2554{ 2555 u32 status; 2556 s32 ret_val; 2557 u16 phy_data; 2558 2559 if (hw->mac_type >= e1000_82543) { 2560 status = er32(STATUS); 2561 if (status & E1000_STATUS_SPEED_1000) { 2562 *speed = SPEED_1000; 2563 e_dbg("1000 Mbs, "); 2564 } else if (status & E1000_STATUS_SPEED_100) { 2565 *speed = SPEED_100; 2566 e_dbg("100 Mbs, "); 2567 } else { 2568 *speed = SPEED_10; 2569 e_dbg("10 Mbs, "); 2570 } 2571 2572 if (status & E1000_STATUS_FD) { 2573 *duplex = FULL_DUPLEX; 2574 e_dbg("Full Duplex\n"); 2575 } else { 2576 *duplex = HALF_DUPLEX; 2577 e_dbg(" Half Duplex\n"); 2578 } 2579 } else { 2580 e_dbg("1000 Mbs, Full Duplex\n"); 2581 *speed = SPEED_1000; 2582 *duplex = FULL_DUPLEX; 2583 } 2584 2585 /* IGP01 PHY may advertise full duplex operation after speed downgrade 2586 * even if it is operating at half duplex. Here we set the duplex 2587 * settings to match the duplex in the link partner's capabilities. 2588 */ 2589 if (hw->phy_type == e1000_phy_igp && hw->speed_downgraded) { 2590 ret_val = e1000_read_phy_reg(hw, PHY_AUTONEG_EXP, &phy_data); 2591 if (ret_val) 2592 return ret_val; 2593 2594 if (!(phy_data & NWAY_ER_LP_NWAY_CAPS)) 2595 *duplex = HALF_DUPLEX; 2596 else { 2597 ret_val = 2598 e1000_read_phy_reg(hw, PHY_LP_ABILITY, &phy_data); 2599 if (ret_val) 2600 return ret_val; 2601 if ((*speed == SPEED_100 && 2602 !(phy_data & NWAY_LPAR_100TX_FD_CAPS)) || 2603 (*speed == SPEED_10 && 2604 !(phy_data & NWAY_LPAR_10T_FD_CAPS))) 2605 *duplex = HALF_DUPLEX; 2606 } 2607 } 2608 2609 return E1000_SUCCESS; 2610} 2611 2612/** 2613 * e1000_wait_autoneg 2614 * @hw: Struct containing variables accessed by shared code 2615 * 2616 * Blocks until autoneg completes or times out (~4.5 seconds) 2617 */ 2618static s32 e1000_wait_autoneg(struct e1000_hw *hw) 2619{ 2620 s32 ret_val; 2621 u16 i; 2622 u16 phy_data; 2623 2624 e_dbg("Waiting for Auto-Neg to complete.\n"); 2625 2626 /* We will wait for autoneg to complete or 4.5 seconds to expire. */ 2627 for (i = PHY_AUTO_NEG_TIME; i > 0; i--) { 2628 /* Read the MII Status Register and wait for Auto-Neg 2629 * Complete bit to be set. 2630 */ 2631 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 2632 if (ret_val) 2633 return ret_val; 2634 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 2635 if (ret_val) 2636 return ret_val; 2637 if (phy_data & MII_SR_AUTONEG_COMPLETE) 2638 return E1000_SUCCESS; 2639 2640 msleep(100); 2641 } 2642 return E1000_SUCCESS; 2643} 2644 2645/** 2646 * e1000_raise_mdi_clk - Raises the Management Data Clock 2647 * @hw: Struct containing variables accessed by shared code 2648 * @ctrl: Device control register's current value 2649 */ 2650static void e1000_raise_mdi_clk(struct e1000_hw *hw, u32 *ctrl) 2651{ 2652 /* Raise the clock input to the Management Data Clock (by setting the 2653 * MDC bit), and then delay 10 microseconds. 2654 */ 2655 ew32(CTRL, (*ctrl | E1000_CTRL_MDC)); 2656 E1000_WRITE_FLUSH(); 2657 udelay(10); 2658} 2659 2660/** 2661 * e1000_lower_mdi_clk - Lowers the Management Data Clock 2662 * @hw: Struct containing variables accessed by shared code 2663 * @ctrl: Device control register's current value 2664 */ 2665static void e1000_lower_mdi_clk(struct e1000_hw *hw, u32 *ctrl) 2666{ 2667 /* Lower the clock input to the Management Data Clock (by clearing the 2668 * MDC bit), and then delay 10 microseconds. 2669 */ 2670 ew32(CTRL, (*ctrl & ~E1000_CTRL_MDC)); 2671 E1000_WRITE_FLUSH(); 2672 udelay(10); 2673} 2674 2675/** 2676 * e1000_shift_out_mdi_bits - Shifts data bits out to the PHY 2677 * @hw: Struct containing variables accessed by shared code 2678 * @data: Data to send out to the PHY 2679 * @count: Number of bits to shift out 2680 * 2681 * Bits are shifted out in MSB to LSB order. 2682 */ 2683static void e1000_shift_out_mdi_bits(struct e1000_hw *hw, u32 data, u16 count) 2684{ 2685 u32 ctrl; 2686 u32 mask; 2687 2688 /* We need to shift "count" number of bits out to the PHY. So, the value 2689 * in the "data" parameter will be shifted out to the PHY one bit at a 2690 * time. In order to do this, "data" must be broken down into bits. 2691 */ 2692 mask = 0x01; 2693 mask <<= (count - 1); 2694 2695 ctrl = er32(CTRL); 2696 2697 /* Set MDIO_DIR and MDC_DIR direction bits to be used as output pins. */ 2698 ctrl |= (E1000_CTRL_MDIO_DIR | E1000_CTRL_MDC_DIR); 2699 2700 while (mask) { 2701 /* A "1" is shifted out to the PHY by setting the MDIO bit to 2702 * "1" and then raising and lowering the Management Data Clock. 2703 * A "0" is shifted out to the PHY by setting the MDIO bit to 2704 * "0" and then raising and lowering the clock. 2705 */ 2706 if (data & mask) 2707 ctrl |= E1000_CTRL_MDIO; 2708 else 2709 ctrl &= ~E1000_CTRL_MDIO; 2710 2711 ew32(CTRL, ctrl); 2712 E1000_WRITE_FLUSH(); 2713 2714 udelay(10); 2715 2716 e1000_raise_mdi_clk(hw, &ctrl); 2717 e1000_lower_mdi_clk(hw, &ctrl); 2718 2719 mask = mask >> 1; 2720 } 2721} 2722 2723/** 2724 * e1000_shift_in_mdi_bits - Shifts data bits in from the PHY 2725 * @hw: Struct containing variables accessed by shared code 2726 * 2727 * Bits are shifted in MSB to LSB order. 2728 */ 2729static u16 e1000_shift_in_mdi_bits(struct e1000_hw *hw) 2730{ 2731 u32 ctrl; 2732 u16 data = 0; 2733 u8 i; 2734 2735 /* In order to read a register from the PHY, we need to shift in a total 2736 * of 18 bits from the PHY. The first two bit (turnaround) times are 2737 * used to avoid contention on the MDIO pin when a read operation is 2738 * performed. These two bits are ignored by us and thrown away. Bits are 2739 * "shifted in" by raising the input to the Management Data Clock 2740 * (setting the MDC bit), and then reading the value of the MDIO bit. 2741 */ 2742 ctrl = er32(CTRL); 2743 2744 /* Clear MDIO_DIR (SWDPIO1) to indicate this bit is to be used as 2745 * input. 2746 */ 2747 ctrl &= ~E1000_CTRL_MDIO_DIR; 2748 ctrl &= ~E1000_CTRL_MDIO; 2749 2750 ew32(CTRL, ctrl); 2751 E1000_WRITE_FLUSH(); 2752 2753 /* Raise and Lower the clock before reading in the data. This accounts 2754 * for the turnaround bits. The first clock occurred when we clocked out 2755 * the last bit of the Register Address. 2756 */ 2757 e1000_raise_mdi_clk(hw, &ctrl); 2758 e1000_lower_mdi_clk(hw, &ctrl); 2759 2760 for (data = 0, i = 0; i < 16; i++) { 2761 data = data << 1; 2762 e1000_raise_mdi_clk(hw, &ctrl); 2763 ctrl = er32(CTRL); 2764 /* Check to see if we shifted in a "1". */ 2765 if (ctrl & E1000_CTRL_MDIO) 2766 data |= 1; 2767 e1000_lower_mdi_clk(hw, &ctrl); 2768 } 2769 2770 e1000_raise_mdi_clk(hw, &ctrl); 2771 e1000_lower_mdi_clk(hw, &ctrl); 2772 2773 return data; 2774} 2775 2776/** 2777 * e1000_read_phy_reg - read a phy register 2778 * @hw: Struct containing variables accessed by shared code 2779 * @reg_addr: address of the PHY register to read 2780 * @phy_data: pointer to the value on the PHY register 2781 * 2782 * Reads the value from a PHY register, if the value is on a specific non zero 2783 * page, sets the page first. 2784 */ 2785s32 e1000_read_phy_reg(struct e1000_hw *hw, u32 reg_addr, u16 *phy_data) 2786{ 2787 u32 ret_val; 2788 unsigned long flags; 2789 2790 spin_lock_irqsave(&e1000_phy_lock, flags); 2791 2792 if ((hw->phy_type == e1000_phy_igp) && 2793 (reg_addr > MAX_PHY_MULTI_PAGE_REG)) { 2794 ret_val = e1000_write_phy_reg_ex(hw, IGP01E1000_PHY_PAGE_SELECT, 2795 (u16) reg_addr); 2796 if (ret_val) 2797 goto out; 2798 } 2799 2800 ret_val = e1000_read_phy_reg_ex(hw, MAX_PHY_REG_ADDRESS & reg_addr, 2801 phy_data); 2802out: 2803 spin_unlock_irqrestore(&e1000_phy_lock, flags); 2804 2805 return ret_val; 2806} 2807 2808static s32 e1000_read_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr, 2809 u16 *phy_data) 2810{ 2811 u32 i; 2812 u32 mdic = 0; 2813 const u32 phy_addr = (hw->mac_type == e1000_ce4100) ? hw->phy_addr : 1; 2814 2815 if (reg_addr > MAX_PHY_REG_ADDRESS) { 2816 e_dbg("PHY Address %d is out of range\n", reg_addr); 2817 return -E1000_ERR_PARAM; 2818 } 2819 2820 if (hw->mac_type > e1000_82543) { 2821 /* Set up Op-code, Phy Address, and register address in the MDI 2822 * Control register. The MAC will take care of interfacing with 2823 * the PHY to retrieve the desired data. 2824 */ 2825 if (hw->mac_type == e1000_ce4100) { 2826 mdic = ((reg_addr << E1000_MDIC_REG_SHIFT) | 2827 (phy_addr << E1000_MDIC_PHY_SHIFT) | 2828 (INTEL_CE_GBE_MDIC_OP_READ) | 2829 (INTEL_CE_GBE_MDIC_GO)); 2830 2831 writel(mdic, E1000_MDIO_CMD); 2832 2833 /* Poll the ready bit to see if the MDI read 2834 * completed 2835 */ 2836 for (i = 0; i < 64; i++) { 2837 udelay(50); 2838 mdic = readl(E1000_MDIO_CMD); 2839 if (!(mdic & INTEL_CE_GBE_MDIC_GO)) 2840 break; 2841 } 2842 2843 if (mdic & INTEL_CE_GBE_MDIC_GO) { 2844 e_dbg("MDI Read did not complete\n"); 2845 return -E1000_ERR_PHY; 2846 } 2847 2848 mdic = readl(E1000_MDIO_STS); 2849 if (mdic & INTEL_CE_GBE_MDIC_READ_ERROR) { 2850 e_dbg("MDI Read Error\n"); 2851 return -E1000_ERR_PHY; 2852 } 2853 *phy_data = (u16)mdic; 2854 } else { 2855 mdic = ((reg_addr << E1000_MDIC_REG_SHIFT) | 2856 (phy_addr << E1000_MDIC_PHY_SHIFT) | 2857 (E1000_MDIC_OP_READ)); 2858 2859 ew32(MDIC, mdic); 2860 2861 /* Poll the ready bit to see if the MDI read 2862 * completed 2863 */ 2864 for (i = 0; i < 64; i++) { 2865 udelay(50); 2866 mdic = er32(MDIC); 2867 if (mdic & E1000_MDIC_READY) 2868 break; 2869 } 2870 if (!(mdic & E1000_MDIC_READY)) { 2871 e_dbg("MDI Read did not complete\n"); 2872 return -E1000_ERR_PHY; 2873 } 2874 if (mdic & E1000_MDIC_ERROR) { 2875 e_dbg("MDI Error\n"); 2876 return -E1000_ERR_PHY; 2877 } 2878 *phy_data = (u16)mdic; 2879 } 2880 } else { 2881 /* We must first send a preamble through the MDIO pin to signal 2882 * the beginning of an MII instruction. This is done by sending 2883 * 32 consecutive "1" bits. 2884 */ 2885 e1000_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE); 2886 2887 /* Now combine the next few fields that are required for a read 2888 * operation. We use this method instead of calling the 2889 * e1000_shift_out_mdi_bits routine five different times. The 2890 * format of a MII read instruction consists of a shift out of 2891 * 14 bits and is defined as follows: 2892 * <Preamble><SOF><Op Code><Phy Addr><Reg Addr> 2893 * followed by a shift in of 18 bits. This first two bits 2894 * shifted in are TurnAround bits used to avoid contention on 2895 * the MDIO pin when a READ operation is performed. These two 2896 * bits are thrown away followed by a shift in of 16 bits which 2897 * contains the desired data. 2898 */ 2899 mdic = ((reg_addr) | (phy_addr << 5) | 2900 (PHY_OP_READ << 10) | (PHY_SOF << 12)); 2901 2902 e1000_shift_out_mdi_bits(hw, mdic, 14); 2903 2904 /* Now that we've shifted out the read command to the MII, we 2905 * need to "shift in" the 16-bit value (18 total bits) of the 2906 * requested PHY register address. 2907 */ 2908 *phy_data = e1000_shift_in_mdi_bits(hw); 2909 } 2910 return E1000_SUCCESS; 2911} 2912 2913/** 2914 * e1000_write_phy_reg - write a phy register 2915 * 2916 * @hw: Struct containing variables accessed by shared code 2917 * @reg_addr: address of the PHY register to write 2918 * @phy_data: data to write to the PHY 2919 * 2920 * Writes a value to a PHY register 2921 */ 2922s32 e1000_write_phy_reg(struct e1000_hw *hw, u32 reg_addr, u16 phy_data) 2923{ 2924 u32 ret_val; 2925 unsigned long flags; 2926 2927 spin_lock_irqsave(&e1000_phy_lock, flags); 2928 2929 if ((hw->phy_type == e1000_phy_igp) && 2930 (reg_addr > MAX_PHY_MULTI_PAGE_REG)) { 2931 ret_val = e1000_write_phy_reg_ex(hw, IGP01E1000_PHY_PAGE_SELECT, 2932 (u16)reg_addr); 2933 if (ret_val) { 2934 spin_unlock_irqrestore(&e1000_phy_lock, flags); 2935 return ret_val; 2936 } 2937 } 2938 2939 ret_val = e1000_write_phy_reg_ex(hw, MAX_PHY_REG_ADDRESS & reg_addr, 2940 phy_data); 2941 spin_unlock_irqrestore(&e1000_phy_lock, flags); 2942 2943 return ret_val; 2944} 2945 2946static s32 e1000_write_phy_reg_ex(struct e1000_hw *hw, u32 reg_addr, 2947 u16 phy_data) 2948{ 2949 u32 i; 2950 u32 mdic = 0; 2951 const u32 phy_addr = (hw->mac_type == e1000_ce4100) ? hw->phy_addr : 1; 2952 2953 if (reg_addr > MAX_PHY_REG_ADDRESS) { 2954 e_dbg("PHY Address %d is out of range\n", reg_addr); 2955 return -E1000_ERR_PARAM; 2956 } 2957 2958 if (hw->mac_type > e1000_82543) { 2959 /* Set up Op-code, Phy Address, register address, and data 2960 * intended for the PHY register in the MDI Control register. 2961 * The MAC will take care of interfacing with the PHY to send 2962 * the desired data. 2963 */ 2964 if (hw->mac_type == e1000_ce4100) { 2965 mdic = (((u32)phy_data) | 2966 (reg_addr << E1000_MDIC_REG_SHIFT) | 2967 (phy_addr << E1000_MDIC_PHY_SHIFT) | 2968 (INTEL_CE_GBE_MDIC_OP_WRITE) | 2969 (INTEL_CE_GBE_MDIC_GO)); 2970 2971 writel(mdic, E1000_MDIO_CMD); 2972 2973 /* Poll the ready bit to see if the MDI read 2974 * completed 2975 */ 2976 for (i = 0; i < 640; i++) { 2977 udelay(5); 2978 mdic = readl(E1000_MDIO_CMD); 2979 if (!(mdic & INTEL_CE_GBE_MDIC_GO)) 2980 break; 2981 } 2982 if (mdic & INTEL_CE_GBE_MDIC_GO) { 2983 e_dbg("MDI Write did not complete\n"); 2984 return -E1000_ERR_PHY; 2985 } 2986 } else { 2987 mdic = (((u32)phy_data) | 2988 (reg_addr << E1000_MDIC_REG_SHIFT) | 2989 (phy_addr << E1000_MDIC_PHY_SHIFT) | 2990 (E1000_MDIC_OP_WRITE)); 2991 2992 ew32(MDIC, mdic); 2993 2994 /* Poll the ready bit to see if the MDI read 2995 * completed 2996 */ 2997 for (i = 0; i < 641; i++) { 2998 udelay(5); 2999 mdic = er32(MDIC); 3000 if (mdic & E1000_MDIC_READY) 3001 break; 3002 } 3003 if (!(mdic & E1000_MDIC_READY)) { 3004 e_dbg("MDI Write did not complete\n"); 3005 return -E1000_ERR_PHY; 3006 } 3007 } 3008 } else { 3009 /* We'll need to use the SW defined pins to shift the write 3010 * command out to the PHY. We first send a preamble to the PHY 3011 * to signal the beginning of the MII instruction. This is done 3012 * by sending 32 consecutive "1" bits. 3013 */ 3014 e1000_shift_out_mdi_bits(hw, PHY_PREAMBLE, PHY_PREAMBLE_SIZE); 3015 3016 /* Now combine the remaining required fields that will indicate 3017 * a write operation. We use this method instead of calling the 3018 * e1000_shift_out_mdi_bits routine for each field in the 3019 * command. The format of a MII write instruction is as follows: 3020 * <Preamble><SOF><OpCode><PhyAddr><RegAddr><Turnaround><Data>. 3021 */ 3022 mdic = ((PHY_TURNAROUND) | (reg_addr << 2) | (phy_addr << 7) | 3023 (PHY_OP_WRITE << 12) | (PHY_SOF << 14)); 3024 mdic <<= 16; 3025 mdic |= (u32)phy_data; 3026 3027 e1000_shift_out_mdi_bits(hw, mdic, 32); 3028 } 3029 3030 return E1000_SUCCESS; 3031} 3032 3033/** 3034 * e1000_phy_hw_reset - reset the phy, hardware style 3035 * @hw: Struct containing variables accessed by shared code 3036 * 3037 * Returns the PHY to the power-on reset state 3038 */ 3039s32 e1000_phy_hw_reset(struct e1000_hw *hw) 3040{ 3041 u32 ctrl, ctrl_ext; 3042 u32 led_ctrl; 3043 3044 e_dbg("Resetting Phy...\n"); 3045 3046 if (hw->mac_type > e1000_82543) { 3047 /* Read the device control register and assert the 3048 * E1000_CTRL_PHY_RST bit. Then, take it out of reset. 3049 * For e1000 hardware, we delay for 10ms between the assert 3050 * and de-assert. 3051 */ 3052 ctrl = er32(CTRL); 3053 ew32(CTRL, ctrl | E1000_CTRL_PHY_RST); 3054 E1000_WRITE_FLUSH(); 3055 3056 msleep(10); 3057 3058 ew32(CTRL, ctrl); 3059 E1000_WRITE_FLUSH(); 3060 3061 } else { 3062 /* Read the Extended Device Control Register, assert the 3063 * PHY_RESET_DIR bit to put the PHY into reset. Then, take it 3064 * out of reset. 3065 */ 3066 ctrl_ext = er32(CTRL_EXT); 3067 ctrl_ext |= E1000_CTRL_EXT_SDP4_DIR; 3068 ctrl_ext &= ~E1000_CTRL_EXT_SDP4_DATA; 3069 ew32(CTRL_EXT, ctrl_ext); 3070 E1000_WRITE_FLUSH(); 3071 msleep(10); 3072 ctrl_ext |= E1000_CTRL_EXT_SDP4_DATA; 3073 ew32(CTRL_EXT, ctrl_ext); 3074 E1000_WRITE_FLUSH(); 3075 } 3076 udelay(150); 3077 3078 if ((hw->mac_type == e1000_82541) || (hw->mac_type == e1000_82547)) { 3079 /* Configure activity LED after PHY reset */ 3080 led_ctrl = er32(LEDCTL); 3081 led_ctrl &= IGP_ACTIVITY_LED_MASK; 3082 led_ctrl |= (IGP_ACTIVITY_LED_ENABLE | IGP_LED3_MODE); 3083 ew32(LEDCTL, led_ctrl); 3084 } 3085 3086 /* Wait for FW to finish PHY configuration. */ 3087 return e1000_get_phy_cfg_done(hw); 3088} 3089 3090/** 3091 * e1000_phy_reset - reset the phy to commit settings 3092 * @hw: Struct containing variables accessed by shared code 3093 * 3094 * Resets the PHY 3095 * Sets bit 15 of the MII Control register 3096 */ 3097s32 e1000_phy_reset(struct e1000_hw *hw) 3098{ 3099 s32 ret_val; 3100 u16 phy_data; 3101 3102 switch (hw->phy_type) { 3103 case e1000_phy_igp: 3104 ret_val = e1000_phy_hw_reset(hw); 3105 if (ret_val) 3106 return ret_val; 3107 break; 3108 default: 3109 ret_val = e1000_read_phy_reg(hw, PHY_CTRL, &phy_data); 3110 if (ret_val) 3111 return ret_val; 3112 3113 phy_data |= MII_CR_RESET; 3114 ret_val = e1000_write_phy_reg(hw, PHY_CTRL, phy_data); 3115 if (ret_val) 3116 return ret_val; 3117 3118 udelay(1); 3119 break; 3120 } 3121 3122 if (hw->phy_type == e1000_phy_igp) 3123 e1000_phy_init_script(hw); 3124 3125 return E1000_SUCCESS; 3126} 3127 3128/** 3129 * e1000_detect_gig_phy - check the phy type 3130 * @hw: Struct containing variables accessed by shared code 3131 * 3132 * Probes the expected PHY address for known PHY IDs 3133 */ 3134static s32 e1000_detect_gig_phy(struct e1000_hw *hw) 3135{ 3136 s32 phy_init_status, ret_val; 3137 u16 phy_id_high, phy_id_low; 3138 bool match = false; 3139 3140 if (hw->phy_id != 0) 3141 return E1000_SUCCESS; 3142 3143 /* Read the PHY ID Registers to identify which PHY is onboard. */ 3144 ret_val = e1000_read_phy_reg(hw, PHY_ID1, &phy_id_high); 3145 if (ret_val) 3146 return ret_val; 3147 3148 hw->phy_id = (u32)(phy_id_high << 16); 3149 udelay(20); 3150 ret_val = e1000_read_phy_reg(hw, PHY_ID2, &phy_id_low); 3151 if (ret_val) 3152 return ret_val; 3153 3154 hw->phy_id |= (u32)(phy_id_low & PHY_REVISION_MASK); 3155 hw->phy_revision = (u32)phy_id_low & ~PHY_REVISION_MASK; 3156 3157 switch (hw->mac_type) { 3158 case e1000_82543: 3159 if (hw->phy_id == M88E1000_E_PHY_ID) 3160 match = true; 3161 break; 3162 case e1000_82544: 3163 if (hw->phy_id == M88E1000_I_PHY_ID) 3164 match = true; 3165 break; 3166 case e1000_82540: 3167 case e1000_82545: 3168 case e1000_82545_rev_3: 3169 case e1000_82546: 3170 case e1000_82546_rev_3: 3171 if (hw->phy_id == M88E1011_I_PHY_ID) 3172 match = true; 3173 break; 3174 case e1000_ce4100: 3175 if ((hw->phy_id == RTL8211B_PHY_ID) || 3176 (hw->phy_id == RTL8201N_PHY_ID) || 3177 (hw->phy_id == M88E1118_E_PHY_ID)) 3178 match = true; 3179 break; 3180 case e1000_82541: 3181 case e1000_82541_rev_2: 3182 case e1000_82547: 3183 case e1000_82547_rev_2: 3184 if (hw->phy_id == IGP01E1000_I_PHY_ID) 3185 match = true; 3186 break; 3187 default: 3188 e_dbg("Invalid MAC type %d\n", hw->mac_type); 3189 return -E1000_ERR_CONFIG; 3190 } 3191 phy_init_status = e1000_set_phy_type(hw); 3192 3193 if ((match) && (phy_init_status == E1000_SUCCESS)) { 3194 e_dbg("PHY ID 0x%X detected\n", hw->phy_id); 3195 return E1000_SUCCESS; 3196 } 3197 e_dbg("Invalid PHY ID 0x%X\n", hw->phy_id); 3198 return -E1000_ERR_PHY; 3199} 3200 3201/** 3202 * e1000_phy_reset_dsp - reset DSP 3203 * @hw: Struct containing variables accessed by shared code 3204 * 3205 * Resets the PHY's DSP 3206 */ 3207static s32 e1000_phy_reset_dsp(struct e1000_hw *hw) 3208{ 3209 s32 ret_val; 3210 3211 do { 3212 ret_val = e1000_write_phy_reg(hw, 29, 0x001d); 3213 if (ret_val) 3214 break; 3215 ret_val = e1000_write_phy_reg(hw, 30, 0x00c1); 3216 if (ret_val) 3217 break; 3218 ret_val = e1000_write_phy_reg(hw, 30, 0x0000); 3219 if (ret_val) 3220 break; 3221 ret_val = E1000_SUCCESS; 3222 } while (0); 3223 3224 return ret_val; 3225} 3226 3227/** 3228 * e1000_phy_igp_get_info - get igp specific registers 3229 * @hw: Struct containing variables accessed by shared code 3230 * @phy_info: PHY information structure 3231 * 3232 * Get PHY information from various PHY registers for igp PHY only. 3233 */ 3234static s32 e1000_phy_igp_get_info(struct e1000_hw *hw, 3235 struct e1000_phy_info *phy_info) 3236{ 3237 s32 ret_val; 3238 u16 phy_data, min_length, max_length, average; 3239 e1000_rev_polarity polarity; 3240 3241 /* The downshift status is checked only once, after link is established, 3242 * and it stored in the hw->speed_downgraded parameter. 3243 */ 3244 phy_info->downshift = (e1000_downshift) hw->speed_downgraded; 3245 3246 /* IGP01E1000 does not need to support it. */ 3247 phy_info->extended_10bt_distance = e1000_10bt_ext_dist_enable_normal; 3248 3249 /* IGP01E1000 always correct polarity reversal */ 3250 phy_info->polarity_correction = e1000_polarity_reversal_enabled; 3251 3252 /* Check polarity status */ 3253 ret_val = e1000_check_polarity(hw, &polarity); 3254 if (ret_val) 3255 return ret_val; 3256 3257 phy_info->cable_polarity = polarity; 3258 3259 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_STATUS, &phy_data); 3260 if (ret_val) 3261 return ret_val; 3262 3263 phy_info->mdix_mode = 3264 (e1000_auto_x_mode)FIELD_GET(IGP01E1000_PSSR_MDIX, phy_data); 3265 3266 if ((phy_data & IGP01E1000_PSSR_SPEED_MASK) == 3267 IGP01E1000_PSSR_SPEED_1000MBPS) { 3268 /* Local/Remote Receiver Information are only valid @ 1000 3269 * Mbps 3270 */ 3271 ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_data); 3272 if (ret_val) 3273 return ret_val; 3274 3275 phy_info->local_rx = FIELD_GET(SR_1000T_LOCAL_RX_STATUS, 3276 phy_data) ? 3277 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok; 3278 phy_info->remote_rx = FIELD_GET(SR_1000T_REMOTE_RX_STATUS, 3279 phy_data) ? 3280 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok; 3281 3282 /* Get cable length */ 3283 ret_val = e1000_get_cable_length(hw, &min_length, &max_length); 3284 if (ret_val) 3285 return ret_val; 3286 3287 /* Translate to old method */ 3288 average = (max_length + min_length) / 2; 3289 3290 if (average <= e1000_igp_cable_length_50) 3291 phy_info->cable_length = e1000_cable_length_50; 3292 else if (average <= e1000_igp_cable_length_80) 3293 phy_info->cable_length = e1000_cable_length_50_80; 3294 else if (average <= e1000_igp_cable_length_110) 3295 phy_info->cable_length = e1000_cable_length_80_110; 3296 else if (average <= e1000_igp_cable_length_140) 3297 phy_info->cable_length = e1000_cable_length_110_140; 3298 else 3299 phy_info->cable_length = e1000_cable_length_140; 3300 } 3301 3302 return E1000_SUCCESS; 3303} 3304 3305/** 3306 * e1000_phy_m88_get_info - get m88 specific registers 3307 * @hw: Struct containing variables accessed by shared code 3308 * @phy_info: PHY information structure 3309 * 3310 * Get PHY information from various PHY registers for m88 PHY only. 3311 */ 3312static s32 e1000_phy_m88_get_info(struct e1000_hw *hw, 3313 struct e1000_phy_info *phy_info) 3314{ 3315 s32 ret_val; 3316 u16 phy_data; 3317 e1000_rev_polarity polarity; 3318 3319 /* The downshift status is checked only once, after link is established, 3320 * and it stored in the hw->speed_downgraded parameter. 3321 */ 3322 phy_info->downshift = (e1000_downshift) hw->speed_downgraded; 3323 3324 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_CTRL, &phy_data); 3325 if (ret_val) 3326 return ret_val; 3327 3328 phy_info->extended_10bt_distance = 3329 FIELD_GET(M88E1000_PSCR_10BT_EXT_DIST_ENABLE, phy_data) ? 3330 e1000_10bt_ext_dist_enable_lower : 3331 e1000_10bt_ext_dist_enable_normal; 3332 3333 phy_info->polarity_correction = 3334 FIELD_GET(M88E1000_PSCR_POLARITY_REVERSAL, phy_data) ? 3335 e1000_polarity_reversal_disabled : e1000_polarity_reversal_enabled; 3336 3337 /* Check polarity status */ 3338 ret_val = e1000_check_polarity(hw, &polarity); 3339 if (ret_val) 3340 return ret_val; 3341 phy_info->cable_polarity = polarity; 3342 3343 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, &phy_data); 3344 if (ret_val) 3345 return ret_val; 3346 3347 phy_info->mdix_mode = 3348 (e1000_auto_x_mode)FIELD_GET(M88E1000_PSSR_MDIX, phy_data); 3349 3350 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) { 3351 /* Cable Length Estimation and Local/Remote Receiver Information 3352 * are only valid at 1000 Mbps. 3353 */ 3354 phy_info->cable_length = 3355 (e1000_cable_length)FIELD_GET(M88E1000_PSSR_CABLE_LENGTH, 3356 phy_data); 3357 3358 ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_data); 3359 if (ret_val) 3360 return ret_val; 3361 3362 phy_info->local_rx = FIELD_GET(SR_1000T_LOCAL_RX_STATUS, 3363 phy_data) ? 3364 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok; 3365 phy_info->remote_rx = FIELD_GET(SR_1000T_REMOTE_RX_STATUS, 3366 phy_data) ? 3367 e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok; 3368 } 3369 3370 return E1000_SUCCESS; 3371} 3372 3373/** 3374 * e1000_phy_get_info - request phy info 3375 * @hw: Struct containing variables accessed by shared code 3376 * @phy_info: PHY information structure 3377 * 3378 * Get PHY information from various PHY registers 3379 */ 3380s32 e1000_phy_get_info(struct e1000_hw *hw, struct e1000_phy_info *phy_info) 3381{ 3382 s32 ret_val; 3383 u16 phy_data; 3384 3385 phy_info->cable_length = e1000_cable_length_undefined; 3386 phy_info->extended_10bt_distance = e1000_10bt_ext_dist_enable_undefined; 3387 phy_info->cable_polarity = e1000_rev_polarity_undefined; 3388 phy_info->downshift = e1000_downshift_undefined; 3389 phy_info->polarity_correction = e1000_polarity_reversal_undefined; 3390 phy_info->mdix_mode = e1000_auto_x_mode_undefined; 3391 phy_info->local_rx = e1000_1000t_rx_status_undefined; 3392 phy_info->remote_rx = e1000_1000t_rx_status_undefined; 3393 3394 if (hw->media_type != e1000_media_type_copper) { 3395 e_dbg("PHY info is only valid for copper media\n"); 3396 return -E1000_ERR_CONFIG; 3397 } 3398 3399 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 3400 if (ret_val) 3401 return ret_val; 3402 3403 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &phy_data); 3404 if (ret_val) 3405 return ret_val; 3406 3407 if ((phy_data & MII_SR_LINK_STATUS) != MII_SR_LINK_STATUS) { 3408 e_dbg("PHY info is only valid if link is up\n"); 3409 return -E1000_ERR_CONFIG; 3410 } 3411 3412 if (hw->phy_type == e1000_phy_igp) 3413 return e1000_phy_igp_get_info(hw, phy_info); 3414 else if ((hw->phy_type == e1000_phy_8211) || 3415 (hw->phy_type == e1000_phy_8201)) 3416 return E1000_SUCCESS; 3417 else 3418 return e1000_phy_m88_get_info(hw, phy_info); 3419} 3420 3421s32 e1000_validate_mdi_setting(struct e1000_hw *hw) 3422{ 3423 if (!hw->autoneg && (hw->mdix == 0 || hw->mdix == 3)) { 3424 e_dbg("Invalid MDI setting detected\n"); 3425 hw->mdix = 1; 3426 return -E1000_ERR_CONFIG; 3427 } 3428 return E1000_SUCCESS; 3429} 3430 3431/** 3432 * e1000_init_eeprom_params - initialize sw eeprom vars 3433 * @hw: Struct containing variables accessed by shared code 3434 * 3435 * Sets up eeprom variables in the hw struct. Must be called after mac_type 3436 * is configured. 3437 */ 3438s32 e1000_init_eeprom_params(struct e1000_hw *hw) 3439{ 3440 struct e1000_eeprom_info *eeprom = &hw->eeprom; 3441 u32 eecd = er32(EECD); 3442 s32 ret_val = E1000_SUCCESS; 3443 u16 eeprom_size; 3444 3445 switch (hw->mac_type) { 3446 case e1000_82542_rev2_0: 3447 case e1000_82542_rev2_1: 3448 case e1000_82543: 3449 case e1000_82544: 3450 eeprom->type = e1000_eeprom_microwire; 3451 eeprom->word_size = 64; 3452 eeprom->opcode_bits = 3; 3453 eeprom->address_bits = 6; 3454 eeprom->delay_usec = 50; 3455 break; 3456 case e1000_82540: 3457 case e1000_82545: 3458 case e1000_82545_rev_3: 3459 case e1000_82546: 3460 case e1000_82546_rev_3: 3461 eeprom->type = e1000_eeprom_microwire; 3462 eeprom->opcode_bits = 3; 3463 eeprom->delay_usec = 50; 3464 if (eecd & E1000_EECD_SIZE) { 3465 eeprom->word_size = 256; 3466 eeprom->address_bits = 8; 3467 } else { 3468 eeprom->word_size = 64; 3469 eeprom->address_bits = 6; 3470 } 3471 break; 3472 case e1000_82541: 3473 case e1000_82541_rev_2: 3474 case e1000_82547: 3475 case e1000_82547_rev_2: 3476 if (eecd & E1000_EECD_TYPE) { 3477 eeprom->type = e1000_eeprom_spi; 3478 eeprom->opcode_bits = 8; 3479 eeprom->delay_usec = 1; 3480 if (eecd & E1000_EECD_ADDR_BITS) { 3481 eeprom->page_size = 32; 3482 eeprom->address_bits = 16; 3483 } else { 3484 eeprom->page_size = 8; 3485 eeprom->address_bits = 8; 3486 } 3487 } else { 3488 eeprom->type = e1000_eeprom_microwire; 3489 eeprom->opcode_bits = 3; 3490 eeprom->delay_usec = 50; 3491 if (eecd & E1000_EECD_ADDR_BITS) { 3492 eeprom->word_size = 256; 3493 eeprom->address_bits = 8; 3494 } else { 3495 eeprom->word_size = 64; 3496 eeprom->address_bits = 6; 3497 } 3498 } 3499 break; 3500 default: 3501 break; 3502 } 3503 3504 if (eeprom->type == e1000_eeprom_spi) { 3505 /* eeprom_size will be an enum [0..8] that maps to eeprom sizes 3506 * 128B to 32KB (incremented by powers of 2). 3507 */ 3508 /* Set to default value for initial eeprom read. */ 3509 eeprom->word_size = 64; 3510 ret_val = e1000_read_eeprom(hw, EEPROM_CFG, 1, &eeprom_size); 3511 if (ret_val) 3512 return ret_val; 3513 eeprom_size = 3514 FIELD_GET(EEPROM_SIZE_MASK, eeprom_size); 3515 /* 256B eeprom size was not supported in earlier hardware, so we 3516 * bump eeprom_size up one to ensure that "1" (which maps to 3517 * 256B) is never the result used in the shifting logic below. 3518 */ 3519 if (eeprom_size) 3520 eeprom_size++; 3521 3522 eeprom->word_size = 1 << (eeprom_size + EEPROM_WORD_SIZE_SHIFT); 3523 } 3524 return ret_val; 3525} 3526 3527/** 3528 * e1000_raise_ee_clk - Raises the EEPROM's clock input. 3529 * @hw: Struct containing variables accessed by shared code 3530 * @eecd: EECD's current value 3531 */ 3532static void e1000_raise_ee_clk(struct e1000_hw *hw, u32 *eecd) 3533{ 3534 /* Raise the clock input to the EEPROM (by setting the SK bit), and then 3535 * wait <delay> microseconds. 3536 */ 3537 *eecd = *eecd | E1000_EECD_SK; 3538 ew32(EECD, *eecd); 3539 E1000_WRITE_FLUSH(); 3540 udelay(hw->eeprom.delay_usec); 3541} 3542 3543/** 3544 * e1000_lower_ee_clk - Lowers the EEPROM's clock input. 3545 * @hw: Struct containing variables accessed by shared code 3546 * @eecd: EECD's current value 3547 */ 3548static void e1000_lower_ee_clk(struct e1000_hw *hw, u32 *eecd) 3549{ 3550 /* Lower the clock input to the EEPROM (by clearing the SK bit), and 3551 * then wait 50 microseconds. 3552 */ 3553 *eecd = *eecd & ~E1000_EECD_SK; 3554 ew32(EECD, *eecd); 3555 E1000_WRITE_FLUSH(); 3556 udelay(hw->eeprom.delay_usec); 3557} 3558 3559/** 3560 * e1000_shift_out_ee_bits - Shift data bits out to the EEPROM. 3561 * @hw: Struct containing variables accessed by shared code 3562 * @data: data to send to the EEPROM 3563 * @count: number of bits to shift out 3564 */ 3565static void e1000_shift_out_ee_bits(struct e1000_hw *hw, u16 data, u16 count) 3566{ 3567 struct e1000_eeprom_info *eeprom = &hw->eeprom; 3568 u32 eecd; 3569 u32 mask; 3570 3571 /* We need to shift "count" bits out to the EEPROM. So, value in the 3572 * "data" parameter will be shifted out to the EEPROM one bit at a time. 3573 * In order to do this, "data" must be broken down into bits. 3574 */ 3575 mask = 0x01 << (count - 1); 3576 eecd = er32(EECD); 3577 if (eeprom->type == e1000_eeprom_microwire) 3578 eecd &= ~E1000_EECD_DO; 3579 else if (eeprom->type == e1000_eeprom_spi) 3580 eecd |= E1000_EECD_DO; 3581 3582 do { 3583 /* A "1" is shifted out to the EEPROM by setting bit "DI" to a 3584 * "1", and then raising and then lowering the clock (the SK bit 3585 * controls the clock input to the EEPROM). A "0" is shifted 3586 * out to the EEPROM by setting "DI" to "0" and then raising and 3587 * then lowering the clock. 3588 */ 3589 eecd &= ~E1000_EECD_DI; 3590 3591 if (data & mask) 3592 eecd |= E1000_EECD_DI; 3593 3594 ew32(EECD, eecd); 3595 E1000_WRITE_FLUSH(); 3596 3597 udelay(eeprom->delay_usec); 3598 3599 e1000_raise_ee_clk(hw, &eecd); 3600 e1000_lower_ee_clk(hw, &eecd); 3601 3602 mask = mask >> 1; 3603 3604 } while (mask); 3605 3606 /* We leave the "DI" bit set to "0" when we leave this routine. */ 3607 eecd &= ~E1000_EECD_DI; 3608 ew32(EECD, eecd); 3609} 3610 3611/** 3612 * e1000_shift_in_ee_bits - Shift data bits in from the EEPROM 3613 * @hw: Struct containing variables accessed by shared code 3614 * @count: number of bits to shift in 3615 */ 3616static u16 e1000_shift_in_ee_bits(struct e1000_hw *hw, u16 count) 3617{ 3618 u32 eecd; 3619 u32 i; 3620 u16 data; 3621 3622 /* In order to read a register from the EEPROM, we need to shift 'count' 3623 * bits in from the EEPROM. Bits are "shifted in" by raising the clock 3624 * input to the EEPROM (setting the SK bit), and then reading the value 3625 * of the "DO" bit. During this "shifting in" process the "DI" bit 3626 * should always be clear. 3627 */ 3628 3629 eecd = er32(EECD); 3630 3631 eecd &= ~(E1000_EECD_DO | E1000_EECD_DI); 3632 data = 0; 3633 3634 for (i = 0; i < count; i++) { 3635 data = data << 1; 3636 e1000_raise_ee_clk(hw, &eecd); 3637 3638 eecd = er32(EECD); 3639 3640 eecd &= ~(E1000_EECD_DI); 3641 if (eecd & E1000_EECD_DO) 3642 data |= 1; 3643 3644 e1000_lower_ee_clk(hw, &eecd); 3645 } 3646 3647 return data; 3648} 3649 3650/** 3651 * e1000_acquire_eeprom - Prepares EEPROM for access 3652 * @hw: Struct containing variables accessed by shared code 3653 * 3654 * Lowers EEPROM clock. Clears input pin. Sets the chip select pin. This 3655 * function should be called before issuing a command to the EEPROM. 3656 */ 3657static s32 e1000_acquire_eeprom(struct e1000_hw *hw) 3658{ 3659 struct e1000_eeprom_info *eeprom = &hw->eeprom; 3660 u32 eecd, i = 0; 3661 3662 eecd = er32(EECD); 3663 3664 /* Request EEPROM Access */ 3665 if (hw->mac_type > e1000_82544) { 3666 eecd |= E1000_EECD_REQ; 3667 ew32(EECD, eecd); 3668 eecd = er32(EECD); 3669 while ((!(eecd & E1000_EECD_GNT)) && 3670 (i < E1000_EEPROM_GRANT_ATTEMPTS)) { 3671 i++; 3672 udelay(5); 3673 eecd = er32(EECD); 3674 } 3675 if (!(eecd & E1000_EECD_GNT)) { 3676 eecd &= ~E1000_EECD_REQ; 3677 ew32(EECD, eecd); 3678 e_dbg("Could not acquire EEPROM grant\n"); 3679 return -E1000_ERR_EEPROM; 3680 } 3681 } 3682 3683 /* Setup EEPROM for Read/Write */ 3684 3685 if (eeprom->type == e1000_eeprom_microwire) { 3686 /* Clear SK and DI */ 3687 eecd &= ~(E1000_EECD_DI | E1000_EECD_SK); 3688 ew32(EECD, eecd); 3689 3690 /* Set CS */ 3691 eecd |= E1000_EECD_CS; 3692 ew32(EECD, eecd); 3693 } else if (eeprom->type == e1000_eeprom_spi) { 3694 /* Clear SK and CS */ 3695 eecd &= ~(E1000_EECD_CS | E1000_EECD_SK); 3696 ew32(EECD, eecd); 3697 E1000_WRITE_FLUSH(); 3698 udelay(1); 3699 } 3700 3701 return E1000_SUCCESS; 3702} 3703 3704/** 3705 * e1000_standby_eeprom - Returns EEPROM to a "standby" state 3706 * @hw: Struct containing variables accessed by shared code 3707 */ 3708static void e1000_standby_eeprom(struct e1000_hw *hw) 3709{ 3710 struct e1000_eeprom_info *eeprom = &hw->eeprom; 3711 u32 eecd; 3712 3713 eecd = er32(EECD); 3714 3715 if (eeprom->type == e1000_eeprom_microwire) { 3716 eecd &= ~(E1000_EECD_CS | E1000_EECD_SK); 3717 ew32(EECD, eecd); 3718 E1000_WRITE_FLUSH(); 3719 udelay(eeprom->delay_usec); 3720 3721 /* Clock high */ 3722 eecd |= E1000_EECD_SK; 3723 ew32(EECD, eecd); 3724 E1000_WRITE_FLUSH(); 3725 udelay(eeprom->delay_usec); 3726 3727 /* Select EEPROM */ 3728 eecd |= E1000_EECD_CS; 3729 ew32(EECD, eecd); 3730 E1000_WRITE_FLUSH(); 3731 udelay(eeprom->delay_usec); 3732 3733 /* Clock low */ 3734 eecd &= ~E1000_EECD_SK; 3735 ew32(EECD, eecd); 3736 E1000_WRITE_FLUSH(); 3737 udelay(eeprom->delay_usec); 3738 } else if (eeprom->type == e1000_eeprom_spi) { 3739 /* Toggle CS to flush commands */ 3740 eecd |= E1000_EECD_CS; 3741 ew32(EECD, eecd); 3742 E1000_WRITE_FLUSH(); 3743 udelay(eeprom->delay_usec); 3744 eecd &= ~E1000_EECD_CS; 3745 ew32(EECD, eecd); 3746 E1000_WRITE_FLUSH(); 3747 udelay(eeprom->delay_usec); 3748 } 3749} 3750 3751/** 3752 * e1000_release_eeprom - drop chip select 3753 * @hw: Struct containing variables accessed by shared code 3754 * 3755 * Terminates a command by inverting the EEPROM's chip select pin 3756 */ 3757static void e1000_release_eeprom(struct e1000_hw *hw) 3758{ 3759 u32 eecd; 3760 3761 eecd = er32(EECD); 3762 3763 if (hw->eeprom.type == e1000_eeprom_spi) { 3764 eecd |= E1000_EECD_CS; /* Pull CS high */ 3765 eecd &= ~E1000_EECD_SK; /* Lower SCK */ 3766 3767 ew32(EECD, eecd); 3768 E1000_WRITE_FLUSH(); 3769 3770 udelay(hw->eeprom.delay_usec); 3771 } else if (hw->eeprom.type == e1000_eeprom_microwire) { 3772 /* cleanup eeprom */ 3773 3774 /* CS on Microwire is active-high */ 3775 eecd &= ~(E1000_EECD_CS | E1000_EECD_DI); 3776 3777 ew32(EECD, eecd); 3778 3779 /* Rising edge of clock */ 3780 eecd |= E1000_EECD_SK; 3781 ew32(EECD, eecd); 3782 E1000_WRITE_FLUSH(); 3783 udelay(hw->eeprom.delay_usec); 3784 3785 /* Falling edge of clock */ 3786 eecd &= ~E1000_EECD_SK; 3787 ew32(EECD, eecd); 3788 E1000_WRITE_FLUSH(); 3789 udelay(hw->eeprom.delay_usec); 3790 } 3791 3792 /* Stop requesting EEPROM access */ 3793 if (hw->mac_type > e1000_82544) { 3794 eecd &= ~E1000_EECD_REQ; 3795 ew32(EECD, eecd); 3796 } 3797} 3798 3799/** 3800 * e1000_spi_eeprom_ready - Reads a 16 bit word from the EEPROM. 3801 * @hw: Struct containing variables accessed by shared code 3802 */ 3803static s32 e1000_spi_eeprom_ready(struct e1000_hw *hw) 3804{ 3805 u16 retry_count = 0; 3806 u8 spi_stat_reg; 3807 3808 /* Read "Status Register" repeatedly until the LSB is cleared. The 3809 * EEPROM will signal that the command has been completed by clearing 3810 * bit 0 of the internal status register. If it's not cleared within 3811 * 5 milliseconds, then error out. 3812 */ 3813 retry_count = 0; 3814 do { 3815 e1000_shift_out_ee_bits(hw, EEPROM_RDSR_OPCODE_SPI, 3816 hw->eeprom.opcode_bits); 3817 spi_stat_reg = (u8)e1000_shift_in_ee_bits(hw, 8); 3818 if (!(spi_stat_reg & EEPROM_STATUS_RDY_SPI)) 3819 break; 3820 3821 udelay(5); 3822 retry_count += 5; 3823 3824 e1000_standby_eeprom(hw); 3825 } while (retry_count < EEPROM_MAX_RETRY_SPI); 3826 3827 /* ATMEL SPI write time could vary from 0-20mSec on 3.3V devices (and 3828 * only 0-5mSec on 5V devices) 3829 */ 3830 if (retry_count >= EEPROM_MAX_RETRY_SPI) { 3831 e_dbg("SPI EEPROM Status error\n"); 3832 return -E1000_ERR_EEPROM; 3833 } 3834 3835 return E1000_SUCCESS; 3836} 3837 3838/** 3839 * e1000_read_eeprom - Reads a 16 bit word from the EEPROM. 3840 * @hw: Struct containing variables accessed by shared code 3841 * @offset: offset of word in the EEPROM to read 3842 * @data: word read from the EEPROM 3843 * @words: number of words to read 3844 */ 3845s32 e1000_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words, u16 *data) 3846{ 3847 s32 ret; 3848 3849 mutex_lock(&e1000_eeprom_lock); 3850 ret = e1000_do_read_eeprom(hw, offset, words, data); 3851 mutex_unlock(&e1000_eeprom_lock); 3852 return ret; 3853} 3854 3855static s32 e1000_do_read_eeprom(struct e1000_hw *hw, u16 offset, u16 words, 3856 u16 *data) 3857{ 3858 struct e1000_eeprom_info *eeprom = &hw->eeprom; 3859 u32 i = 0; 3860 3861 if (hw->mac_type == e1000_ce4100) { 3862 GBE_CONFIG_FLASH_READ(GBE_CONFIG_BASE_VIRT, offset, words, 3863 data); 3864 return E1000_SUCCESS; 3865 } 3866 3867 /* A check for invalid values: offset too large, too many words, and 3868 * not enough words. 3869 */ 3870 if ((offset >= eeprom->word_size) || 3871 (words > eeprom->word_size - offset) || 3872 (words == 0)) { 3873 e_dbg("\"words\" parameter out of bounds. Words = %d," 3874 "size = %d\n", offset, eeprom->word_size); 3875 return -E1000_ERR_EEPROM; 3876 } 3877 3878 /* EEPROM's that don't use EERD to read require us to bit-bang the SPI 3879 * directly. In this case, we need to acquire the EEPROM so that 3880 * FW or other port software does not interrupt. 3881 */ 3882 /* Prepare the EEPROM for bit-bang reading */ 3883 if (e1000_acquire_eeprom(hw) != E1000_SUCCESS) 3884 return -E1000_ERR_EEPROM; 3885 3886 /* Set up the SPI or Microwire EEPROM for bit-bang reading. We have 3887 * acquired the EEPROM at this point, so any returns should release it 3888 */ 3889 if (eeprom->type == e1000_eeprom_spi) { 3890 u16 word_in; 3891 u8 read_opcode = EEPROM_READ_OPCODE_SPI; 3892 3893 if (e1000_spi_eeprom_ready(hw)) { 3894 e1000_release_eeprom(hw); 3895 return -E1000_ERR_EEPROM; 3896 } 3897 3898 e1000_standby_eeprom(hw); 3899 3900 /* Some SPI eeproms use the 8th address bit embedded in the 3901 * opcode 3902 */ 3903 if ((eeprom->address_bits == 8) && (offset >= 128)) 3904 read_opcode |= EEPROM_A8_OPCODE_SPI; 3905 3906 /* Send the READ command (opcode + addr) */ 3907 e1000_shift_out_ee_bits(hw, read_opcode, eeprom->opcode_bits); 3908 e1000_shift_out_ee_bits(hw, (u16)(offset * 2), 3909 eeprom->address_bits); 3910 3911 /* Read the data. The address of the eeprom internally 3912 * increments with each byte (spi) being read, saving on the 3913 * overhead of eeprom setup and tear-down. The address counter 3914 * will roll over if reading beyond the size of the eeprom, thus 3915 * allowing the entire memory to be read starting from any 3916 * offset. 3917 */ 3918 for (i = 0; i < words; i++) { 3919 word_in = e1000_shift_in_ee_bits(hw, 16); 3920 data[i] = (word_in >> 8) | (word_in << 8); 3921 } 3922 } else if (eeprom->type == e1000_eeprom_microwire) { 3923 for (i = 0; i < words; i++) { 3924 /* Send the READ command (opcode + addr) */ 3925 e1000_shift_out_ee_bits(hw, 3926 EEPROM_READ_OPCODE_MICROWIRE, 3927 eeprom->opcode_bits); 3928 e1000_shift_out_ee_bits(hw, (u16)(offset + i), 3929 eeprom->address_bits); 3930 3931 /* Read the data. For microwire, each word requires the 3932 * overhead of eeprom setup and tear-down. 3933 */ 3934 data[i] = e1000_shift_in_ee_bits(hw, 16); 3935 e1000_standby_eeprom(hw); 3936 cond_resched(); 3937 } 3938 } 3939 3940 /* End this read operation */ 3941 e1000_release_eeprom(hw); 3942 3943 return E1000_SUCCESS; 3944} 3945 3946/** 3947 * e1000_validate_eeprom_checksum - Verifies that the EEPROM has a valid checksum 3948 * @hw: Struct containing variables accessed by shared code 3949 * 3950 * Reads the first 64 16 bit words of the EEPROM and sums the values read. 3951 * If the sum of the 64 16 bit words is 0xBABA, the EEPROM's checksum is 3952 * valid. 3953 */ 3954s32 e1000_validate_eeprom_checksum(struct e1000_hw *hw) 3955{ 3956 u16 checksum = 0; 3957 u16 i, eeprom_data; 3958 3959 for (i = 0; i < (EEPROM_CHECKSUM_REG + 1); i++) { 3960 if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) { 3961 e_dbg("EEPROM Read Error\n"); 3962 return -E1000_ERR_EEPROM; 3963 } 3964 checksum += eeprom_data; 3965 } 3966 3967#ifdef CONFIG_PARISC 3968 /* This is a signature and not a checksum on HP c8000 */ 3969 if ((hw->subsystem_vendor_id == 0x103C) && (eeprom_data == 0x16d6)) 3970 return E1000_SUCCESS; 3971 3972#endif 3973 if (checksum == (u16)EEPROM_SUM) 3974 return E1000_SUCCESS; 3975 else { 3976 e_dbg("EEPROM Checksum Invalid\n"); 3977 return -E1000_ERR_EEPROM; 3978 } 3979} 3980 3981/** 3982 * e1000_update_eeprom_checksum - Calculates/writes the EEPROM checksum 3983 * @hw: Struct containing variables accessed by shared code 3984 * 3985 * Sums the first 63 16 bit words of the EEPROM. Subtracts the sum from 0xBABA. 3986 * Writes the difference to word offset 63 of the EEPROM. 3987 */ 3988s32 e1000_update_eeprom_checksum(struct e1000_hw *hw) 3989{ 3990 u16 checksum = 0; 3991 u16 i, eeprom_data; 3992 3993 for (i = 0; i < EEPROM_CHECKSUM_REG; i++) { 3994 if (e1000_read_eeprom(hw, i, 1, &eeprom_data) < 0) { 3995 e_dbg("EEPROM Read Error\n"); 3996 return -E1000_ERR_EEPROM; 3997 } 3998 checksum += eeprom_data; 3999 } 4000 checksum = (u16)EEPROM_SUM - checksum; 4001 if (e1000_write_eeprom(hw, EEPROM_CHECKSUM_REG, 1, &checksum) < 0) { 4002 e_dbg("EEPROM Write Error\n"); 4003 return -E1000_ERR_EEPROM; 4004 } 4005 return E1000_SUCCESS; 4006} 4007 4008/** 4009 * e1000_write_eeprom - write words to the different EEPROM types. 4010 * @hw: Struct containing variables accessed by shared code 4011 * @offset: offset within the EEPROM to be written to 4012 * @words: number of words to write 4013 * @data: 16 bit word to be written to the EEPROM 4014 * 4015 * If e1000_update_eeprom_checksum is not called after this function, the 4016 * EEPROM will most likely contain an invalid checksum. 4017 */ 4018s32 e1000_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words, u16 *data) 4019{ 4020 s32 ret; 4021 4022 mutex_lock(&e1000_eeprom_lock); 4023 ret = e1000_do_write_eeprom(hw, offset, words, data); 4024 mutex_unlock(&e1000_eeprom_lock); 4025 return ret; 4026} 4027 4028static s32 e1000_do_write_eeprom(struct e1000_hw *hw, u16 offset, u16 words, 4029 u16 *data) 4030{ 4031 struct e1000_eeprom_info *eeprom = &hw->eeprom; 4032 s32 status = 0; 4033 4034 if (hw->mac_type == e1000_ce4100) { 4035 GBE_CONFIG_FLASH_WRITE(GBE_CONFIG_BASE_VIRT, offset, words, 4036 data); 4037 return E1000_SUCCESS; 4038 } 4039 4040 /* A check for invalid values: offset too large, too many words, and 4041 * not enough words. 4042 */ 4043 if ((offset >= eeprom->word_size) || 4044 (words > eeprom->word_size - offset) || 4045 (words == 0)) { 4046 e_dbg("\"words\" parameter out of bounds\n"); 4047 return -E1000_ERR_EEPROM; 4048 } 4049 4050 /* Prepare the EEPROM for writing */ 4051 if (e1000_acquire_eeprom(hw) != E1000_SUCCESS) 4052 return -E1000_ERR_EEPROM; 4053 4054 if (eeprom->type == e1000_eeprom_microwire) { 4055 status = e1000_write_eeprom_microwire(hw, offset, words, data); 4056 } else { 4057 status = e1000_write_eeprom_spi(hw, offset, words, data); 4058 msleep(10); 4059 } 4060 4061 /* Done with writing */ 4062 e1000_release_eeprom(hw); 4063 4064 return status; 4065} 4066 4067/** 4068 * e1000_write_eeprom_spi - Writes a 16 bit word to a given offset in an SPI EEPROM. 4069 * @hw: Struct containing variables accessed by shared code 4070 * @offset: offset within the EEPROM to be written to 4071 * @words: number of words to write 4072 * @data: pointer to array of 8 bit words to be written to the EEPROM 4073 */ 4074static s32 e1000_write_eeprom_spi(struct e1000_hw *hw, u16 offset, u16 words, 4075 u16 *data) 4076{ 4077 struct e1000_eeprom_info *eeprom = &hw->eeprom; 4078 u16 widx = 0; 4079 4080 while (widx < words) { 4081 u8 write_opcode = EEPROM_WRITE_OPCODE_SPI; 4082 4083 if (e1000_spi_eeprom_ready(hw)) 4084 return -E1000_ERR_EEPROM; 4085 4086 e1000_standby_eeprom(hw); 4087 cond_resched(); 4088 4089 /* Send the WRITE ENABLE command (8 bit opcode ) */ 4090 e1000_shift_out_ee_bits(hw, EEPROM_WREN_OPCODE_SPI, 4091 eeprom->opcode_bits); 4092 4093 e1000_standby_eeprom(hw); 4094 4095 /* Some SPI eeproms use the 8th address bit embedded in the 4096 * opcode 4097 */ 4098 if ((eeprom->address_bits == 8) && (offset >= 128)) 4099 write_opcode |= EEPROM_A8_OPCODE_SPI; 4100 4101 /* Send the Write command (8-bit opcode + addr) */ 4102 e1000_shift_out_ee_bits(hw, write_opcode, eeprom->opcode_bits); 4103 4104 e1000_shift_out_ee_bits(hw, (u16)((offset + widx) * 2), 4105 eeprom->address_bits); 4106 4107 /* Send the data */ 4108 4109 /* Loop to allow for up to whole page write (32 bytes) of 4110 * eeprom 4111 */ 4112 while (widx < words) { 4113 u16 word_out = data[widx]; 4114 4115 word_out = (word_out >> 8) | (word_out << 8); 4116 e1000_shift_out_ee_bits(hw, word_out, 16); 4117 widx++; 4118 4119 /* Some larger eeprom sizes are capable of a 32-byte 4120 * PAGE WRITE operation, while the smaller eeproms are 4121 * capable of an 8-byte PAGE WRITE operation. Break the 4122 * inner loop to pass new address 4123 */ 4124 if ((((offset + widx) * 2) % eeprom->page_size) == 0) { 4125 e1000_standby_eeprom(hw); 4126 break; 4127 } 4128 } 4129 } 4130 4131 return E1000_SUCCESS; 4132} 4133 4134/** 4135 * e1000_write_eeprom_microwire - Writes a 16 bit word to a given offset in a Microwire EEPROM. 4136 * @hw: Struct containing variables accessed by shared code 4137 * @offset: offset within the EEPROM to be written to 4138 * @words: number of words to write 4139 * @data: pointer to array of 8 bit words to be written to the EEPROM 4140 */ 4141static s32 e1000_write_eeprom_microwire(struct e1000_hw *hw, u16 offset, 4142 u16 words, u16 *data) 4143{ 4144 struct e1000_eeprom_info *eeprom = &hw->eeprom; 4145 u32 eecd; 4146 u16 words_written = 0; 4147 u16 i = 0; 4148 4149 /* Send the write enable command to the EEPROM (3-bit opcode plus 4150 * 6/8-bit dummy address beginning with 11). It's less work to include 4151 * the 11 of the dummy address as part of the opcode than it is to shift 4152 * it over the correct number of bits for the address. This puts the 4153 * EEPROM into write/erase mode. 4154 */ 4155 e1000_shift_out_ee_bits(hw, EEPROM_EWEN_OPCODE_MICROWIRE, 4156 (u16)(eeprom->opcode_bits + 2)); 4157 4158 e1000_shift_out_ee_bits(hw, 0, (u16)(eeprom->address_bits - 2)); 4159 4160 /* Prepare the EEPROM */ 4161 e1000_standby_eeprom(hw); 4162 4163 while (words_written < words) { 4164 /* Send the Write command (3-bit opcode + addr) */ 4165 e1000_shift_out_ee_bits(hw, EEPROM_WRITE_OPCODE_MICROWIRE, 4166 eeprom->opcode_bits); 4167 4168 e1000_shift_out_ee_bits(hw, (u16)(offset + words_written), 4169 eeprom->address_bits); 4170 4171 /* Send the data */ 4172 e1000_shift_out_ee_bits(hw, data[words_written], 16); 4173 4174 /* Toggle the CS line. This in effect tells the EEPROM to 4175 * execute the previous command. 4176 */ 4177 e1000_standby_eeprom(hw); 4178 4179 /* Read DO repeatedly until it is high (equal to '1'). The 4180 * EEPROM will signal that the command has been completed by 4181 * raising the DO signal. If DO does not go high in 10 4182 * milliseconds, then error out. 4183 */ 4184 for (i = 0; i < 200; i++) { 4185 eecd = er32(EECD); 4186 if (eecd & E1000_EECD_DO) 4187 break; 4188 udelay(50); 4189 } 4190 if (i == 200) { 4191 e_dbg("EEPROM Write did not complete\n"); 4192 return -E1000_ERR_EEPROM; 4193 } 4194 4195 /* Recover from write */ 4196 e1000_standby_eeprom(hw); 4197 cond_resched(); 4198 4199 words_written++; 4200 } 4201 4202 /* Send the write disable command to the EEPROM (3-bit opcode plus 4203 * 6/8-bit dummy address beginning with 10). It's less work to include 4204 * the 10 of the dummy address as part of the opcode than it is to shift 4205 * it over the correct number of bits for the address. This takes the 4206 * EEPROM out of write/erase mode. 4207 */ 4208 e1000_shift_out_ee_bits(hw, EEPROM_EWDS_OPCODE_MICROWIRE, 4209 (u16)(eeprom->opcode_bits + 2)); 4210 4211 e1000_shift_out_ee_bits(hw, 0, (u16)(eeprom->address_bits - 2)); 4212 4213 return E1000_SUCCESS; 4214} 4215 4216/** 4217 * e1000_read_mac_addr - read the adapters MAC from eeprom 4218 * @hw: Struct containing variables accessed by shared code 4219 * 4220 * Reads the adapter's MAC address from the EEPROM and inverts the LSB for the 4221 * second function of dual function devices 4222 */ 4223s32 e1000_read_mac_addr(struct e1000_hw *hw) 4224{ 4225 u16 offset; 4226 u16 eeprom_data, i; 4227 4228 for (i = 0; i < NODE_ADDRESS_SIZE; i += 2) { 4229 offset = i >> 1; 4230 if (e1000_read_eeprom(hw, offset, 1, &eeprom_data) < 0) { 4231 e_dbg("EEPROM Read Error\n"); 4232 return -E1000_ERR_EEPROM; 4233 } 4234 hw->perm_mac_addr[i] = (u8)(eeprom_data & 0x00FF); 4235 hw->perm_mac_addr[i + 1] = (u8)(eeprom_data >> 8); 4236 } 4237 4238 switch (hw->mac_type) { 4239 default: 4240 break; 4241 case e1000_82546: 4242 case e1000_82546_rev_3: 4243 if (er32(STATUS) & E1000_STATUS_FUNC_1) 4244 hw->perm_mac_addr[5] ^= 0x01; 4245 break; 4246 } 4247 4248 for (i = 0; i < NODE_ADDRESS_SIZE; i++) 4249 hw->mac_addr[i] = hw->perm_mac_addr[i]; 4250 return E1000_SUCCESS; 4251} 4252 4253/** 4254 * e1000_init_rx_addrs - Initializes receive address filters. 4255 * @hw: Struct containing variables accessed by shared code 4256 * 4257 * Places the MAC address in receive address register 0 and clears the rest 4258 * of the receive address registers. Clears the multicast table. Assumes 4259 * the receiver is in reset when the routine is called. 4260 */ 4261static void e1000_init_rx_addrs(struct e1000_hw *hw) 4262{ 4263 u32 i; 4264 u32 rar_num; 4265 4266 /* Setup the receive address. */ 4267 e_dbg("Programming MAC Address into RAR[0]\n"); 4268 4269 e1000_rar_set(hw, hw->mac_addr, 0); 4270 4271 rar_num = E1000_RAR_ENTRIES; 4272 4273 /* Zero out the following 14 receive addresses. RAR[15] is for 4274 * manageability 4275 */ 4276 e_dbg("Clearing RAR[1-14]\n"); 4277 for (i = 1; i < rar_num; i++) { 4278 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1), 0); 4279 E1000_WRITE_FLUSH(); 4280 E1000_WRITE_REG_ARRAY(hw, RA, ((i << 1) + 1), 0); 4281 E1000_WRITE_FLUSH(); 4282 } 4283} 4284 4285/** 4286 * e1000_hash_mc_addr - Hashes an address to determine its location in the multicast table 4287 * @hw: Struct containing variables accessed by shared code 4288 * @mc_addr: the multicast address to hash 4289 */ 4290u32 e1000_hash_mc_addr(struct e1000_hw *hw, u8 *mc_addr) 4291{ 4292 u32 hash_value = 0; 4293 4294 /* The portion of the address that is used for the hash table is 4295 * determined by the mc_filter_type setting. 4296 */ 4297 switch (hw->mc_filter_type) { 4298 /* [0] [1] [2] [3] [4] [5] 4299 * 01 AA 00 12 34 56 4300 * LSB MSB 4301 */ 4302 case 0: 4303 /* [47:36] i.e. 0x563 for above example address */ 4304 hash_value = ((mc_addr[4] >> 4) | (((u16)mc_addr[5]) << 4)); 4305 break; 4306 case 1: 4307 /* [46:35] i.e. 0xAC6 for above example address */ 4308 hash_value = ((mc_addr[4] >> 3) | (((u16)mc_addr[5]) << 5)); 4309 break; 4310 case 2: 4311 /* [45:34] i.e. 0x5D8 for above example address */ 4312 hash_value = ((mc_addr[4] >> 2) | (((u16)mc_addr[5]) << 6)); 4313 break; 4314 case 3: 4315 /* [43:32] i.e. 0x634 for above example address */ 4316 hash_value = ((mc_addr[4]) | (((u16)mc_addr[5]) << 8)); 4317 break; 4318 } 4319 4320 hash_value &= 0xFFF; 4321 return hash_value; 4322} 4323 4324/** 4325 * e1000_rar_set - Puts an ethernet address into a receive address register. 4326 * @hw: Struct containing variables accessed by shared code 4327 * @addr: Address to put into receive address register 4328 * @index: Receive address register to write 4329 */ 4330void e1000_rar_set(struct e1000_hw *hw, u8 *addr, u32 index) 4331{ 4332 u32 rar_low, rar_high; 4333 4334 /* HW expects these in little endian so we reverse the byte order 4335 * from network order (big endian) to little endian 4336 */ 4337 rar_low = ((u32)addr[0] | ((u32)addr[1] << 8) | 4338 ((u32)addr[2] << 16) | ((u32)addr[3] << 24)); 4339 rar_high = ((u32)addr[4] | ((u32)addr[5] << 8)); 4340 4341 /* Disable Rx and flush all Rx frames before enabling RSS to avoid Rx 4342 * unit hang. 4343 * 4344 * Description: 4345 * If there are any Rx frames queued up or otherwise present in the HW 4346 * before RSS is enabled, and then we enable RSS, the HW Rx unit will 4347 * hang. To work around this issue, we have to disable receives and 4348 * flush out all Rx frames before we enable RSS. To do so, we modify we 4349 * redirect all Rx traffic to manageability and then reset the HW. 4350 * This flushes away Rx frames, and (since the redirections to 4351 * manageability persists across resets) keeps new ones from coming in 4352 * while we work. Then, we clear the Address Valid AV bit for all MAC 4353 * addresses and undo the re-direction to manageability. 4354 * Now, frames are coming in again, but the MAC won't accept them, so 4355 * far so good. We now proceed to initialize RSS (if necessary) and 4356 * configure the Rx unit. Last, we re-enable the AV bits and continue 4357 * on our merry way. 4358 */ 4359 switch (hw->mac_type) { 4360 default: 4361 /* Indicate to hardware the Address is Valid. */ 4362 rar_high |= E1000_RAH_AV; 4363 break; 4364 } 4365 4366 E1000_WRITE_REG_ARRAY(hw, RA, (index << 1), rar_low); 4367 E1000_WRITE_FLUSH(); 4368 E1000_WRITE_REG_ARRAY(hw, RA, ((index << 1) + 1), rar_high); 4369 E1000_WRITE_FLUSH(); 4370} 4371 4372/** 4373 * e1000_write_vfta - Writes a value to the specified offset in the VLAN filter table. 4374 * @hw: Struct containing variables accessed by shared code 4375 * @offset: Offset in VLAN filter table to write 4376 * @value: Value to write into VLAN filter table 4377 */ 4378void e1000_write_vfta(struct e1000_hw *hw, u32 offset, u32 value) 4379{ 4380 u32 temp; 4381 4382 if ((hw->mac_type == e1000_82544) && ((offset & 0x1) == 1)) { 4383 temp = E1000_READ_REG_ARRAY(hw, VFTA, (offset - 1)); 4384 E1000_WRITE_REG_ARRAY(hw, VFTA, offset, value); 4385 E1000_WRITE_FLUSH(); 4386 E1000_WRITE_REG_ARRAY(hw, VFTA, (offset - 1), temp); 4387 E1000_WRITE_FLUSH(); 4388 } else { 4389 E1000_WRITE_REG_ARRAY(hw, VFTA, offset, value); 4390 E1000_WRITE_FLUSH(); 4391 } 4392} 4393 4394/** 4395 * e1000_clear_vfta - Clears the VLAN filter table 4396 * @hw: Struct containing variables accessed by shared code 4397 */ 4398static void e1000_clear_vfta(struct e1000_hw *hw) 4399{ 4400 u32 offset; 4401 4402 for (offset = 0; offset < E1000_VLAN_FILTER_TBL_SIZE; offset++) { 4403 E1000_WRITE_REG_ARRAY(hw, VFTA, offset, 0); 4404 E1000_WRITE_FLUSH(); 4405 } 4406} 4407 4408static s32 e1000_id_led_init(struct e1000_hw *hw) 4409{ 4410 u32 ledctl; 4411 const u32 ledctl_mask = 0x000000FF; 4412 const u32 ledctl_on = E1000_LEDCTL_MODE_LED_ON; 4413 const u32 ledctl_off = E1000_LEDCTL_MODE_LED_OFF; 4414 u16 eeprom_data, i, temp; 4415 const u16 led_mask = 0x0F; 4416 4417 if (hw->mac_type < e1000_82540) { 4418 /* Nothing to do */ 4419 return E1000_SUCCESS; 4420 } 4421 4422 ledctl = er32(LEDCTL); 4423 hw->ledctl_default = ledctl; 4424 hw->ledctl_mode1 = hw->ledctl_default; 4425 hw->ledctl_mode2 = hw->ledctl_default; 4426 4427 if (e1000_read_eeprom(hw, EEPROM_ID_LED_SETTINGS, 1, &eeprom_data) < 0) { 4428 e_dbg("EEPROM Read Error\n"); 4429 return -E1000_ERR_EEPROM; 4430 } 4431 4432 if ((eeprom_data == ID_LED_RESERVED_0000) || 4433 (eeprom_data == ID_LED_RESERVED_FFFF)) { 4434 eeprom_data = ID_LED_DEFAULT; 4435 } 4436 4437 for (i = 0; i < 4; i++) { 4438 temp = (eeprom_data >> (i << 2)) & led_mask; 4439 switch (temp) { 4440 case ID_LED_ON1_DEF2: 4441 case ID_LED_ON1_ON2: 4442 case ID_LED_ON1_OFF2: 4443 hw->ledctl_mode1 &= ~(ledctl_mask << (i << 3)); 4444 hw->ledctl_mode1 |= ledctl_on << (i << 3); 4445 break; 4446 case ID_LED_OFF1_DEF2: 4447 case ID_LED_OFF1_ON2: 4448 case ID_LED_OFF1_OFF2: 4449 hw->ledctl_mode1 &= ~(ledctl_mask << (i << 3)); 4450 hw->ledctl_mode1 |= ledctl_off << (i << 3); 4451 break; 4452 default: 4453 /* Do nothing */ 4454 break; 4455 } 4456 switch (temp) { 4457 case ID_LED_DEF1_ON2: 4458 case ID_LED_ON1_ON2: 4459 case ID_LED_OFF1_ON2: 4460 hw->ledctl_mode2 &= ~(ledctl_mask << (i << 3)); 4461 hw->ledctl_mode2 |= ledctl_on << (i << 3); 4462 break; 4463 case ID_LED_DEF1_OFF2: 4464 case ID_LED_ON1_OFF2: 4465 case ID_LED_OFF1_OFF2: 4466 hw->ledctl_mode2 &= ~(ledctl_mask << (i << 3)); 4467 hw->ledctl_mode2 |= ledctl_off << (i << 3); 4468 break; 4469 default: 4470 /* Do nothing */ 4471 break; 4472 } 4473 } 4474 return E1000_SUCCESS; 4475} 4476 4477/** 4478 * e1000_setup_led 4479 * @hw: Struct containing variables accessed by shared code 4480 * 4481 * Prepares SW controlable LED for use and saves the current state of the LED. 4482 */ 4483s32 e1000_setup_led(struct e1000_hw *hw) 4484{ 4485 u32 ledctl; 4486 s32 ret_val = E1000_SUCCESS; 4487 4488 switch (hw->mac_type) { 4489 case e1000_82542_rev2_0: 4490 case e1000_82542_rev2_1: 4491 case e1000_82543: 4492 case e1000_82544: 4493 /* No setup necessary */ 4494 break; 4495 case e1000_82541: 4496 case e1000_82547: 4497 case e1000_82541_rev_2: 4498 case e1000_82547_rev_2: 4499 /* Turn off PHY Smart Power Down (if enabled) */ 4500 ret_val = e1000_read_phy_reg(hw, IGP01E1000_GMII_FIFO, 4501 &hw->phy_spd_default); 4502 if (ret_val) 4503 return ret_val; 4504 ret_val = e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO, 4505 (u16)(hw->phy_spd_default & 4506 ~IGP01E1000_GMII_SPD)); 4507 if (ret_val) 4508 return ret_val; 4509 fallthrough; 4510 default: 4511 if (hw->media_type == e1000_media_type_fiber) { 4512 ledctl = er32(LEDCTL); 4513 /* Save current LEDCTL settings */ 4514 hw->ledctl_default = ledctl; 4515 /* Turn off LED0 */ 4516 ledctl &= ~(E1000_LEDCTL_LED0_IVRT | 4517 E1000_LEDCTL_LED0_BLINK | 4518 E1000_LEDCTL_LED0_MODE_MASK); 4519 ledctl |= (E1000_LEDCTL_MODE_LED_OFF << 4520 E1000_LEDCTL_LED0_MODE_SHIFT); 4521 ew32(LEDCTL, ledctl); 4522 } else if (hw->media_type == e1000_media_type_copper) 4523 ew32(LEDCTL, hw->ledctl_mode1); 4524 break; 4525 } 4526 4527 return E1000_SUCCESS; 4528} 4529 4530/** 4531 * e1000_cleanup_led - Restores the saved state of the SW controlable LED. 4532 * @hw: Struct containing variables accessed by shared code 4533 */ 4534s32 e1000_cleanup_led(struct e1000_hw *hw) 4535{ 4536 s32 ret_val = E1000_SUCCESS; 4537 4538 switch (hw->mac_type) { 4539 case e1000_82542_rev2_0: 4540 case e1000_82542_rev2_1: 4541 case e1000_82543: 4542 case e1000_82544: 4543 /* No cleanup necessary */ 4544 break; 4545 case e1000_82541: 4546 case e1000_82547: 4547 case e1000_82541_rev_2: 4548 case e1000_82547_rev_2: 4549 /* Turn on PHY Smart Power Down (if previously enabled) */ 4550 ret_val = e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO, 4551 hw->phy_spd_default); 4552 if (ret_val) 4553 return ret_val; 4554 fallthrough; 4555 default: 4556 /* Restore LEDCTL settings */ 4557 ew32(LEDCTL, hw->ledctl_default); 4558 break; 4559 } 4560 4561 return E1000_SUCCESS; 4562} 4563 4564/** 4565 * e1000_led_on - Turns on the software controllable LED 4566 * @hw: Struct containing variables accessed by shared code 4567 */ 4568s32 e1000_led_on(struct e1000_hw *hw) 4569{ 4570 u32 ctrl = er32(CTRL); 4571 4572 switch (hw->mac_type) { 4573 case e1000_82542_rev2_0: 4574 case e1000_82542_rev2_1: 4575 case e1000_82543: 4576 /* Set SW Defineable Pin 0 to turn on the LED */ 4577 ctrl |= E1000_CTRL_SWDPIN0; 4578 ctrl |= E1000_CTRL_SWDPIO0; 4579 break; 4580 case e1000_82544: 4581 if (hw->media_type == e1000_media_type_fiber) { 4582 /* Set SW Defineable Pin 0 to turn on the LED */ 4583 ctrl |= E1000_CTRL_SWDPIN0; 4584 ctrl |= E1000_CTRL_SWDPIO0; 4585 } else { 4586 /* Clear SW Defineable Pin 0 to turn on the LED */ 4587 ctrl &= ~E1000_CTRL_SWDPIN0; 4588 ctrl |= E1000_CTRL_SWDPIO0; 4589 } 4590 break; 4591 default: 4592 if (hw->media_type == e1000_media_type_fiber) { 4593 /* Clear SW Defineable Pin 0 to turn on the LED */ 4594 ctrl &= ~E1000_CTRL_SWDPIN0; 4595 ctrl |= E1000_CTRL_SWDPIO0; 4596 } else if (hw->media_type == e1000_media_type_copper) { 4597 ew32(LEDCTL, hw->ledctl_mode2); 4598 return E1000_SUCCESS; 4599 } 4600 break; 4601 } 4602 4603 ew32(CTRL, ctrl); 4604 4605 return E1000_SUCCESS; 4606} 4607 4608/** 4609 * e1000_led_off - Turns off the software controllable LED 4610 * @hw: Struct containing variables accessed by shared code 4611 */ 4612s32 e1000_led_off(struct e1000_hw *hw) 4613{ 4614 u32 ctrl = er32(CTRL); 4615 4616 switch (hw->mac_type) { 4617 case e1000_82542_rev2_0: 4618 case e1000_82542_rev2_1: 4619 case e1000_82543: 4620 /* Clear SW Defineable Pin 0 to turn off the LED */ 4621 ctrl &= ~E1000_CTRL_SWDPIN0; 4622 ctrl |= E1000_CTRL_SWDPIO0; 4623 break; 4624 case e1000_82544: 4625 if (hw->media_type == e1000_media_type_fiber) { 4626 /* Clear SW Defineable Pin 0 to turn off the LED */ 4627 ctrl &= ~E1000_CTRL_SWDPIN0; 4628 ctrl |= E1000_CTRL_SWDPIO0; 4629 } else { 4630 /* Set SW Defineable Pin 0 to turn off the LED */ 4631 ctrl |= E1000_CTRL_SWDPIN0; 4632 ctrl |= E1000_CTRL_SWDPIO0; 4633 } 4634 break; 4635 default: 4636 if (hw->media_type == e1000_media_type_fiber) { 4637 /* Set SW Defineable Pin 0 to turn off the LED */ 4638 ctrl |= E1000_CTRL_SWDPIN0; 4639 ctrl |= E1000_CTRL_SWDPIO0; 4640 } else if (hw->media_type == e1000_media_type_copper) { 4641 ew32(LEDCTL, hw->ledctl_mode1); 4642 return E1000_SUCCESS; 4643 } 4644 break; 4645 } 4646 4647 ew32(CTRL, ctrl); 4648 4649 return E1000_SUCCESS; 4650} 4651 4652/** 4653 * e1000_clear_hw_cntrs - Clears all hardware statistics counters. 4654 * @hw: Struct containing variables accessed by shared code 4655 */ 4656static void e1000_clear_hw_cntrs(struct e1000_hw *hw) 4657{ 4658 er32(CRCERRS); 4659 er32(SYMERRS); 4660 er32(MPC); 4661 er32(SCC); 4662 er32(ECOL); 4663 er32(MCC); 4664 er32(LATECOL); 4665 er32(COLC); 4666 er32(DC); 4667 er32(SEC); 4668 er32(RLEC); 4669 er32(XONRXC); 4670 er32(XONTXC); 4671 er32(XOFFRXC); 4672 er32(XOFFTXC); 4673 er32(FCRUC); 4674 4675 er32(PRC64); 4676 er32(PRC127); 4677 er32(PRC255); 4678 er32(PRC511); 4679 er32(PRC1023); 4680 er32(PRC1522); 4681 4682 er32(GPRC); 4683 er32(BPRC); 4684 er32(MPRC); 4685 er32(GPTC); 4686 er32(GORCL); 4687 er32(GORCH); 4688 er32(GOTCL); 4689 er32(GOTCH); 4690 er32(RNBC); 4691 er32(RUC); 4692 er32(RFC); 4693 er32(ROC); 4694 er32(RJC); 4695 er32(TORL); 4696 er32(TORH); 4697 er32(TOTL); 4698 er32(TOTH); 4699 er32(TPR); 4700 er32(TPT); 4701 4702 er32(PTC64); 4703 er32(PTC127); 4704 er32(PTC255); 4705 er32(PTC511); 4706 er32(PTC1023); 4707 er32(PTC1522); 4708 4709 er32(MPTC); 4710 er32(BPTC); 4711 4712 if (hw->mac_type < e1000_82543) 4713 return; 4714 4715 er32(ALGNERRC); 4716 er32(RXERRC); 4717 er32(TNCRS); 4718 er32(CEXTERR); 4719 er32(TSCTC); 4720 er32(TSCTFC); 4721 4722 if (hw->mac_type <= e1000_82544) 4723 return; 4724 4725 er32(MGTPRC); 4726 er32(MGTPDC); 4727 er32(MGTPTC); 4728} 4729 4730/** 4731 * e1000_reset_adaptive - Resets Adaptive IFS to its default state. 4732 * @hw: Struct containing variables accessed by shared code 4733 * 4734 * Call this after e1000_init_hw. You may override the IFS defaults by setting 4735 * hw->ifs_params_forced to true. However, you must initialize hw-> 4736 * current_ifs_val, ifs_min_val, ifs_max_val, ifs_step_size, and ifs_ratio 4737 * before calling this function. 4738 */ 4739void e1000_reset_adaptive(struct e1000_hw *hw) 4740{ 4741 if (hw->adaptive_ifs) { 4742 if (!hw->ifs_params_forced) { 4743 hw->current_ifs_val = 0; 4744 hw->ifs_min_val = IFS_MIN; 4745 hw->ifs_max_val = IFS_MAX; 4746 hw->ifs_step_size = IFS_STEP; 4747 hw->ifs_ratio = IFS_RATIO; 4748 } 4749 hw->in_ifs_mode = false; 4750 ew32(AIT, 0); 4751 } else { 4752 e_dbg("Not in Adaptive IFS mode!\n"); 4753 } 4754} 4755 4756/** 4757 * e1000_update_adaptive - update adaptive IFS 4758 * @hw: Struct containing variables accessed by shared code 4759 * 4760 * Called during the callback/watchdog routine to update IFS value based on 4761 * the ratio of transmits to collisions. 4762 */ 4763void e1000_update_adaptive(struct e1000_hw *hw) 4764{ 4765 if (hw->adaptive_ifs) { 4766 if ((hw->collision_delta * hw->ifs_ratio) > hw->tx_packet_delta) { 4767 if (hw->tx_packet_delta > MIN_NUM_XMITS) { 4768 hw->in_ifs_mode = true; 4769 if (hw->current_ifs_val < hw->ifs_max_val) { 4770 if (hw->current_ifs_val == 0) 4771 hw->current_ifs_val = 4772 hw->ifs_min_val; 4773 else 4774 hw->current_ifs_val += 4775 hw->ifs_step_size; 4776 ew32(AIT, hw->current_ifs_val); 4777 } 4778 } 4779 } else { 4780 if (hw->in_ifs_mode && 4781 (hw->tx_packet_delta <= MIN_NUM_XMITS)) { 4782 hw->current_ifs_val = 0; 4783 hw->in_ifs_mode = false; 4784 ew32(AIT, 0); 4785 } 4786 } 4787 } else { 4788 e_dbg("Not in Adaptive IFS mode!\n"); 4789 } 4790} 4791 4792/** 4793 * e1000_get_bus_info 4794 * @hw: Struct containing variables accessed by shared code 4795 * 4796 * Gets the current PCI bus type, speed, and width of the hardware 4797 */ 4798void e1000_get_bus_info(struct e1000_hw *hw) 4799{ 4800 u32 status; 4801 4802 switch (hw->mac_type) { 4803 case e1000_82542_rev2_0: 4804 case e1000_82542_rev2_1: 4805 hw->bus_type = e1000_bus_type_pci; 4806 hw->bus_speed = e1000_bus_speed_unknown; 4807 hw->bus_width = e1000_bus_width_unknown; 4808 break; 4809 default: 4810 status = er32(STATUS); 4811 hw->bus_type = (status & E1000_STATUS_PCIX_MODE) ? 4812 e1000_bus_type_pcix : e1000_bus_type_pci; 4813 4814 if (hw->device_id == E1000_DEV_ID_82546EB_QUAD_COPPER) { 4815 hw->bus_speed = (hw->bus_type == e1000_bus_type_pci) ? 4816 e1000_bus_speed_66 : e1000_bus_speed_120; 4817 } else if (hw->bus_type == e1000_bus_type_pci) { 4818 hw->bus_speed = (status & E1000_STATUS_PCI66) ? 4819 e1000_bus_speed_66 : e1000_bus_speed_33; 4820 } else { 4821 switch (status & E1000_STATUS_PCIX_SPEED) { 4822 case E1000_STATUS_PCIX_SPEED_66: 4823 hw->bus_speed = e1000_bus_speed_66; 4824 break; 4825 case E1000_STATUS_PCIX_SPEED_100: 4826 hw->bus_speed = e1000_bus_speed_100; 4827 break; 4828 case E1000_STATUS_PCIX_SPEED_133: 4829 hw->bus_speed = e1000_bus_speed_133; 4830 break; 4831 default: 4832 hw->bus_speed = e1000_bus_speed_reserved; 4833 break; 4834 } 4835 } 4836 hw->bus_width = (status & E1000_STATUS_BUS64) ? 4837 e1000_bus_width_64 : e1000_bus_width_32; 4838 break; 4839 } 4840} 4841 4842/** 4843 * e1000_write_reg_io 4844 * @hw: Struct containing variables accessed by shared code 4845 * @offset: offset to write to 4846 * @value: value to write 4847 * 4848 * Writes a value to one of the devices registers using port I/O (as opposed to 4849 * memory mapped I/O). Only 82544 and newer devices support port I/O. 4850 */ 4851static void e1000_write_reg_io(struct e1000_hw *hw, u32 offset, u32 value) 4852{ 4853 unsigned long io_addr = hw->io_base; 4854 unsigned long io_data = hw->io_base + 4; 4855 4856 e1000_io_write(hw, io_addr, offset); 4857 e1000_io_write(hw, io_data, value); 4858} 4859 4860/** 4861 * e1000_get_cable_length - Estimates the cable length. 4862 * @hw: Struct containing variables accessed by shared code 4863 * @min_length: The estimated minimum length 4864 * @max_length: The estimated maximum length 4865 * 4866 * returns: - E1000_ERR_XXX 4867 * E1000_SUCCESS 4868 * 4869 * This function always returns a ranged length (minimum & maximum). 4870 * So for M88 phy's, this function interprets the one value returned from the 4871 * register to the minimum and maximum range. 4872 * For IGP phy's, the function calculates the range by the AGC registers. 4873 */ 4874static s32 e1000_get_cable_length(struct e1000_hw *hw, u16 *min_length, 4875 u16 *max_length) 4876{ 4877 s32 ret_val; 4878 u16 agc_value = 0; 4879 u16 i, phy_data; 4880 u16 cable_length; 4881 4882 *min_length = *max_length = 0; 4883 4884 /* Use old method for Phy older than IGP */ 4885 if (hw->phy_type == e1000_phy_m88) { 4886 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, 4887 &phy_data); 4888 if (ret_val) 4889 return ret_val; 4890 cable_length = FIELD_GET(M88E1000_PSSR_CABLE_LENGTH, phy_data); 4891 4892 /* Convert the enum value to ranged values */ 4893 switch (cable_length) { 4894 case e1000_cable_length_50: 4895 *min_length = 0; 4896 *max_length = e1000_igp_cable_length_50; 4897 break; 4898 case e1000_cable_length_50_80: 4899 *min_length = e1000_igp_cable_length_50; 4900 *max_length = e1000_igp_cable_length_80; 4901 break; 4902 case e1000_cable_length_80_110: 4903 *min_length = e1000_igp_cable_length_80; 4904 *max_length = e1000_igp_cable_length_110; 4905 break; 4906 case e1000_cable_length_110_140: 4907 *min_length = e1000_igp_cable_length_110; 4908 *max_length = e1000_igp_cable_length_140; 4909 break; 4910 case e1000_cable_length_140: 4911 *min_length = e1000_igp_cable_length_140; 4912 *max_length = e1000_igp_cable_length_170; 4913 break; 4914 default: 4915 return -E1000_ERR_PHY; 4916 } 4917 } else if (hw->phy_type == e1000_phy_igp) { /* For IGP PHY */ 4918 u16 cur_agc_value; 4919 u16 min_agc_value = IGP01E1000_AGC_LENGTH_TABLE_SIZE; 4920 static const u16 agc_reg_array[IGP01E1000_PHY_CHANNEL_NUM] = { 4921 IGP01E1000_PHY_AGC_A, 4922 IGP01E1000_PHY_AGC_B, 4923 IGP01E1000_PHY_AGC_C, 4924 IGP01E1000_PHY_AGC_D 4925 }; 4926 /* Read the AGC registers for all channels */ 4927 for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) { 4928 ret_val = 4929 e1000_read_phy_reg(hw, agc_reg_array[i], &phy_data); 4930 if (ret_val) 4931 return ret_val; 4932 4933 cur_agc_value = phy_data >> IGP01E1000_AGC_LENGTH_SHIFT; 4934 4935 /* Value bound check. */ 4936 if ((cur_agc_value >= 4937 IGP01E1000_AGC_LENGTH_TABLE_SIZE - 1) || 4938 (cur_agc_value == 0)) 4939 return -E1000_ERR_PHY; 4940 4941 agc_value += cur_agc_value; 4942 4943 /* Update minimal AGC value. */ 4944 if (min_agc_value > cur_agc_value) 4945 min_agc_value = cur_agc_value; 4946 } 4947 4948 /* Remove the minimal AGC result for length < 50m */ 4949 if (agc_value < 4950 IGP01E1000_PHY_CHANNEL_NUM * e1000_igp_cable_length_50) { 4951 agc_value -= min_agc_value; 4952 4953 /* Get the average length of the remaining 3 channels */ 4954 agc_value /= (IGP01E1000_PHY_CHANNEL_NUM - 1); 4955 } else { 4956 /* Get the average length of all the 4 channels. */ 4957 agc_value /= IGP01E1000_PHY_CHANNEL_NUM; 4958 } 4959 4960 /* Set the range of the calculated length. */ 4961 *min_length = ((e1000_igp_cable_length_table[agc_value] - 4962 IGP01E1000_AGC_RANGE) > 0) ? 4963 (e1000_igp_cable_length_table[agc_value] - 4964 IGP01E1000_AGC_RANGE) : 0; 4965 *max_length = e1000_igp_cable_length_table[agc_value] + 4966 IGP01E1000_AGC_RANGE; 4967 } 4968 4969 return E1000_SUCCESS; 4970} 4971 4972/** 4973 * e1000_check_polarity - Check the cable polarity 4974 * @hw: Struct containing variables accessed by shared code 4975 * @polarity: output parameter : 0 - Polarity is not reversed 4976 * 1 - Polarity is reversed. 4977 * 4978 * returns: - E1000_ERR_XXX 4979 * E1000_SUCCESS 4980 * 4981 * For phy's older than IGP, this function simply reads the polarity bit in the 4982 * Phy Status register. For IGP phy's, this bit is valid only if link speed is 4983 * 10 Mbps. If the link speed is 100 Mbps there is no polarity so this bit will 4984 * return 0. If the link speed is 1000 Mbps the polarity status is in the 4985 * IGP01E1000_PHY_PCS_INIT_REG. 4986 */ 4987static s32 e1000_check_polarity(struct e1000_hw *hw, 4988 e1000_rev_polarity *polarity) 4989{ 4990 s32 ret_val; 4991 u16 phy_data; 4992 4993 if (hw->phy_type == e1000_phy_m88) { 4994 /* return the Polarity bit in the Status register. */ 4995 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, 4996 &phy_data); 4997 if (ret_val) 4998 return ret_val; 4999 *polarity = FIELD_GET(M88E1000_PSSR_REV_POLARITY, phy_data) ? 5000 e1000_rev_polarity_reversed : e1000_rev_polarity_normal; 5001 5002 } else if (hw->phy_type == e1000_phy_igp) { 5003 /* Read the Status register to check the speed */ 5004 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_STATUS, 5005 &phy_data); 5006 if (ret_val) 5007 return ret_val; 5008 5009 /* If speed is 1000 Mbps, must read the 5010 * IGP01E1000_PHY_PCS_INIT_REG to find the polarity status 5011 */ 5012 if ((phy_data & IGP01E1000_PSSR_SPEED_MASK) == 5013 IGP01E1000_PSSR_SPEED_1000MBPS) { 5014 /* Read the GIG initialization PCS register (0x00B4) */ 5015 ret_val = 5016 e1000_read_phy_reg(hw, IGP01E1000_PHY_PCS_INIT_REG, 5017 &phy_data); 5018 if (ret_val) 5019 return ret_val; 5020 5021 /* Check the polarity bits */ 5022 *polarity = (phy_data & IGP01E1000_PHY_POLARITY_MASK) ? 5023 e1000_rev_polarity_reversed : 5024 e1000_rev_polarity_normal; 5025 } else { 5026 /* For 10 Mbps, read the polarity bit in the status 5027 * register. (for 100 Mbps this bit is always 0) 5028 */ 5029 *polarity = 5030 (phy_data & IGP01E1000_PSSR_POLARITY_REVERSED) ? 5031 e1000_rev_polarity_reversed : 5032 e1000_rev_polarity_normal; 5033 } 5034 } 5035 return E1000_SUCCESS; 5036} 5037 5038/** 5039 * e1000_check_downshift - Check if Downshift occurred 5040 * @hw: Struct containing variables accessed by shared code 5041 * 5042 * returns: - E1000_ERR_XXX 5043 * E1000_SUCCESS 5044 * 5045 * For phy's older than IGP, this function reads the Downshift bit in the Phy 5046 * Specific Status register. For IGP phy's, it reads the Downgrade bit in the 5047 * Link Health register. In IGP this bit is latched high, so the driver must 5048 * read it immediately after link is established. 5049 */ 5050static s32 e1000_check_downshift(struct e1000_hw *hw) 5051{ 5052 s32 ret_val; 5053 u16 phy_data; 5054 5055 if (hw->phy_type == e1000_phy_igp) { 5056 ret_val = e1000_read_phy_reg(hw, IGP01E1000_PHY_LINK_HEALTH, 5057 &phy_data); 5058 if (ret_val) 5059 return ret_val; 5060 5061 hw->speed_downgraded = 5062 (phy_data & IGP01E1000_PLHR_SS_DOWNGRADE) ? 1 : 0; 5063 } else if (hw->phy_type == e1000_phy_m88) { 5064 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_SPEC_STATUS, 5065 &phy_data); 5066 if (ret_val) 5067 return ret_val; 5068 5069 hw->speed_downgraded = FIELD_GET(M88E1000_PSSR_DOWNSHIFT, 5070 phy_data); 5071 } 5072 5073 return E1000_SUCCESS; 5074} 5075 5076static const u16 dsp_reg_array[IGP01E1000_PHY_CHANNEL_NUM] = { 5077 IGP01E1000_PHY_AGC_PARAM_A, 5078 IGP01E1000_PHY_AGC_PARAM_B, 5079 IGP01E1000_PHY_AGC_PARAM_C, 5080 IGP01E1000_PHY_AGC_PARAM_D 5081}; 5082 5083static s32 e1000_1000Mb_check_cable_length(struct e1000_hw *hw) 5084{ 5085 u16 min_length, max_length; 5086 u16 phy_data, i; 5087 s32 ret_val; 5088 5089 ret_val = e1000_get_cable_length(hw, &min_length, &max_length); 5090 if (ret_val) 5091 return ret_val; 5092 5093 if (hw->dsp_config_state != e1000_dsp_config_enabled) 5094 return 0; 5095 5096 if (min_length >= e1000_igp_cable_length_50) { 5097 for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) { 5098 ret_val = e1000_read_phy_reg(hw, dsp_reg_array[i], 5099 &phy_data); 5100 if (ret_val) 5101 return ret_val; 5102 5103 phy_data &= ~IGP01E1000_PHY_EDAC_MU_INDEX; 5104 5105 ret_val = e1000_write_phy_reg(hw, dsp_reg_array[i], 5106 phy_data); 5107 if (ret_val) 5108 return ret_val; 5109 } 5110 hw->dsp_config_state = e1000_dsp_config_activated; 5111 } else { 5112 u16 ffe_idle_err_timeout = FFE_IDLE_ERR_COUNT_TIMEOUT_20; 5113 u32 idle_errs = 0; 5114 5115 /* clear previous idle error counts */ 5116 ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_data); 5117 if (ret_val) 5118 return ret_val; 5119 5120 for (i = 0; i < ffe_idle_err_timeout; i++) { 5121 udelay(1000); 5122 ret_val = e1000_read_phy_reg(hw, PHY_1000T_STATUS, 5123 &phy_data); 5124 if (ret_val) 5125 return ret_val; 5126 5127 idle_errs += (phy_data & SR_1000T_IDLE_ERROR_CNT); 5128 if (idle_errs > SR_1000T_PHY_EXCESSIVE_IDLE_ERR_COUNT) { 5129 hw->ffe_config_state = e1000_ffe_config_active; 5130 5131 ret_val = e1000_write_phy_reg(hw, 5132 IGP01E1000_PHY_DSP_FFE, 5133 IGP01E1000_PHY_DSP_FFE_CM_CP); 5134 if (ret_val) 5135 return ret_val; 5136 break; 5137 } 5138 5139 if (idle_errs) 5140 ffe_idle_err_timeout = 5141 FFE_IDLE_ERR_COUNT_TIMEOUT_100; 5142 } 5143 } 5144 5145 return 0; 5146} 5147 5148/** 5149 * e1000_config_dsp_after_link_change 5150 * @hw: Struct containing variables accessed by shared code 5151 * @link_up: was link up at the time this was called 5152 * 5153 * returns: - E1000_ERR_PHY if fail to read/write the PHY 5154 * E1000_SUCCESS at any other case. 5155 * 5156 * 82541_rev_2 & 82547_rev_2 have the capability to configure the DSP when a 5157 * gigabit link is achieved to improve link quality. 5158 */ 5159 5160static s32 e1000_config_dsp_after_link_change(struct e1000_hw *hw, bool link_up) 5161{ 5162 s32 ret_val; 5163 u16 phy_data, phy_saved_data, speed, duplex, i; 5164 5165 if (hw->phy_type != e1000_phy_igp) 5166 return E1000_SUCCESS; 5167 5168 if (link_up) { 5169 ret_val = e1000_get_speed_and_duplex(hw, &speed, &duplex); 5170 if (ret_val) { 5171 e_dbg("Error getting link speed and duplex\n"); 5172 return ret_val; 5173 } 5174 5175 if (speed == SPEED_1000) { 5176 ret_val = e1000_1000Mb_check_cable_length(hw); 5177 if (ret_val) 5178 return ret_val; 5179 } 5180 } else { 5181 if (hw->dsp_config_state == e1000_dsp_config_activated) { 5182 /* Save off the current value of register 0x2F5B to be 5183 * restored at the end of the routines. 5184 */ 5185 ret_val = 5186 e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data); 5187 5188 if (ret_val) 5189 return ret_val; 5190 5191 /* Disable the PHY transmitter */ 5192 ret_val = e1000_write_phy_reg(hw, 0x2F5B, 0x0003); 5193 5194 if (ret_val) 5195 return ret_val; 5196 5197 msleep(20); 5198 5199 ret_val = e1000_write_phy_reg(hw, 0x0000, 5200 IGP01E1000_IEEE_FORCE_GIGA); 5201 if (ret_val) 5202 return ret_val; 5203 for (i = 0; i < IGP01E1000_PHY_CHANNEL_NUM; i++) { 5204 ret_val = 5205 e1000_read_phy_reg(hw, dsp_reg_array[i], 5206 &phy_data); 5207 if (ret_val) 5208 return ret_val; 5209 5210 phy_data &= ~IGP01E1000_PHY_EDAC_MU_INDEX; 5211 phy_data |= IGP01E1000_PHY_EDAC_SIGN_EXT_9_BITS; 5212 5213 ret_val = 5214 e1000_write_phy_reg(hw, dsp_reg_array[i], 5215 phy_data); 5216 if (ret_val) 5217 return ret_val; 5218 } 5219 5220 ret_val = e1000_write_phy_reg(hw, 0x0000, 5221 IGP01E1000_IEEE_RESTART_AUTONEG); 5222 if (ret_val) 5223 return ret_val; 5224 5225 msleep(20); 5226 5227 /* Now enable the transmitter */ 5228 ret_val = 5229 e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data); 5230 5231 if (ret_val) 5232 return ret_val; 5233 5234 hw->dsp_config_state = e1000_dsp_config_enabled; 5235 } 5236 5237 if (hw->ffe_config_state == e1000_ffe_config_active) { 5238 /* Save off the current value of register 0x2F5B to be 5239 * restored at the end of the routines. 5240 */ 5241 ret_val = 5242 e1000_read_phy_reg(hw, 0x2F5B, &phy_saved_data); 5243 5244 if (ret_val) 5245 return ret_val; 5246 5247 /* Disable the PHY transmitter */ 5248 ret_val = e1000_write_phy_reg(hw, 0x2F5B, 0x0003); 5249 5250 if (ret_val) 5251 return ret_val; 5252 5253 msleep(20); 5254 5255 ret_val = e1000_write_phy_reg(hw, 0x0000, 5256 IGP01E1000_IEEE_FORCE_GIGA); 5257 if (ret_val) 5258 return ret_val; 5259 ret_val = 5260 e1000_write_phy_reg(hw, IGP01E1000_PHY_DSP_FFE, 5261 IGP01E1000_PHY_DSP_FFE_DEFAULT); 5262 if (ret_val) 5263 return ret_val; 5264 5265 ret_val = e1000_write_phy_reg(hw, 0x0000, 5266 IGP01E1000_IEEE_RESTART_AUTONEG); 5267 if (ret_val) 5268 return ret_val; 5269 5270 msleep(20); 5271 5272 /* Now enable the transmitter */ 5273 ret_val = 5274 e1000_write_phy_reg(hw, 0x2F5B, phy_saved_data); 5275 5276 if (ret_val) 5277 return ret_val; 5278 5279 hw->ffe_config_state = e1000_ffe_config_enabled; 5280 } 5281 } 5282 return E1000_SUCCESS; 5283} 5284 5285/** 5286 * e1000_set_phy_mode - Set PHY to class A mode 5287 * @hw: Struct containing variables accessed by shared code 5288 * 5289 * Assumes the following operations will follow to enable the new class mode. 5290 * 1. Do a PHY soft reset 5291 * 2. Restart auto-negotiation or force link. 5292 */ 5293static s32 e1000_set_phy_mode(struct e1000_hw *hw) 5294{ 5295 s32 ret_val; 5296 u16 eeprom_data; 5297 5298 if ((hw->mac_type == e1000_82545_rev_3) && 5299 (hw->media_type == e1000_media_type_copper)) { 5300 ret_val = 5301 e1000_read_eeprom(hw, EEPROM_PHY_CLASS_WORD, 1, 5302 &eeprom_data); 5303 if (ret_val) 5304 return ret_val; 5305 5306 if ((eeprom_data != EEPROM_RESERVED_WORD) && 5307 (eeprom_data & EEPROM_PHY_CLASS_A)) { 5308 ret_val = 5309 e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 5310 0x000B); 5311 if (ret_val) 5312 return ret_val; 5313 ret_val = 5314 e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 5315 0x8104); 5316 if (ret_val) 5317 return ret_val; 5318 5319 hw->phy_reset_disable = false; 5320 } 5321 } 5322 5323 return E1000_SUCCESS; 5324} 5325 5326/** 5327 * e1000_set_d3_lplu_state - set d3 link power state 5328 * @hw: Struct containing variables accessed by shared code 5329 * @active: true to enable lplu false to disable lplu. 5330 * 5331 * This function sets the lplu state according to the active flag. When 5332 * activating lplu this function also disables smart speed and vise versa. 5333 * lplu will not be activated unless the device autonegotiation advertisement 5334 * meets standards of either 10 or 10/100 or 10/100/1000 at all duplexes. 5335 * 5336 * returns: - E1000_ERR_PHY if fail to read/write the PHY 5337 * E1000_SUCCESS at any other case. 5338 */ 5339static s32 e1000_set_d3_lplu_state(struct e1000_hw *hw, bool active) 5340{ 5341 s32 ret_val; 5342 u16 phy_data; 5343 5344 if (hw->phy_type != e1000_phy_igp) 5345 return E1000_SUCCESS; 5346 5347 /* During driver activity LPLU should not be used or it will attain link 5348 * from the lowest speeds starting from 10Mbps. The capability is used 5349 * for Dx transitions and states 5350 */ 5351 if (hw->mac_type == e1000_82541_rev_2 || 5352 hw->mac_type == e1000_82547_rev_2) { 5353 ret_val = 5354 e1000_read_phy_reg(hw, IGP01E1000_GMII_FIFO, &phy_data); 5355 if (ret_val) 5356 return ret_val; 5357 } 5358 5359 if (!active) { 5360 if (hw->mac_type == e1000_82541_rev_2 || 5361 hw->mac_type == e1000_82547_rev_2) { 5362 phy_data &= ~IGP01E1000_GMII_FLEX_SPD; 5363 ret_val = 5364 e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO, 5365 phy_data); 5366 if (ret_val) 5367 return ret_val; 5368 } 5369 5370 /* LPLU and SmartSpeed are mutually exclusive. LPLU is used 5371 * during Dx states where the power conservation is most 5372 * important. During driver activity we should enable 5373 * SmartSpeed, so performance is maintained. 5374 */ 5375 if (hw->smart_speed == e1000_smart_speed_on) { 5376 ret_val = 5377 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 5378 &phy_data); 5379 if (ret_val) 5380 return ret_val; 5381 5382 phy_data |= IGP01E1000_PSCFR_SMART_SPEED; 5383 ret_val = 5384 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 5385 phy_data); 5386 if (ret_val) 5387 return ret_val; 5388 } else if (hw->smart_speed == e1000_smart_speed_off) { 5389 ret_val = 5390 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 5391 &phy_data); 5392 if (ret_val) 5393 return ret_val; 5394 5395 phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED; 5396 ret_val = 5397 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 5398 phy_data); 5399 if (ret_val) 5400 return ret_val; 5401 } 5402 } else if ((hw->autoneg_advertised == AUTONEG_ADVERTISE_SPEED_DEFAULT) || 5403 (hw->autoneg_advertised == AUTONEG_ADVERTISE_10_ALL) || 5404 (hw->autoneg_advertised == AUTONEG_ADVERTISE_10_100_ALL)) { 5405 if (hw->mac_type == e1000_82541_rev_2 || 5406 hw->mac_type == e1000_82547_rev_2) { 5407 phy_data |= IGP01E1000_GMII_FLEX_SPD; 5408 ret_val = 5409 e1000_write_phy_reg(hw, IGP01E1000_GMII_FIFO, 5410 phy_data); 5411 if (ret_val) 5412 return ret_val; 5413 } 5414 5415 /* When LPLU is enabled we should disable SmartSpeed */ 5416 ret_val = 5417 e1000_read_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 5418 &phy_data); 5419 if (ret_val) 5420 return ret_val; 5421 5422 phy_data &= ~IGP01E1000_PSCFR_SMART_SPEED; 5423 ret_val = 5424 e1000_write_phy_reg(hw, IGP01E1000_PHY_PORT_CONFIG, 5425 phy_data); 5426 if (ret_val) 5427 return ret_val; 5428 } 5429 return E1000_SUCCESS; 5430} 5431 5432/** 5433 * e1000_set_vco_speed 5434 * @hw: Struct containing variables accessed by shared code 5435 * 5436 * Change VCO speed register to improve Bit Error Rate performance of SERDES. 5437 */ 5438static s32 e1000_set_vco_speed(struct e1000_hw *hw) 5439{ 5440 s32 ret_val; 5441 u16 default_page = 0; 5442 u16 phy_data; 5443 5444 switch (hw->mac_type) { 5445 case e1000_82545_rev_3: 5446 case e1000_82546_rev_3: 5447 break; 5448 default: 5449 return E1000_SUCCESS; 5450 } 5451 5452 /* Set PHY register 30, page 5, bit 8 to 0 */ 5453 5454 ret_val = 5455 e1000_read_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, &default_page); 5456 if (ret_val) 5457 return ret_val; 5458 5459 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0005); 5460 if (ret_val) 5461 return ret_val; 5462 5463 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, &phy_data); 5464 if (ret_val) 5465 return ret_val; 5466 5467 phy_data &= ~M88E1000_PHY_VCO_REG_BIT8; 5468 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, phy_data); 5469 if (ret_val) 5470 return ret_val; 5471 5472 /* Set PHY register 30, page 4, bit 11 to 1 */ 5473 5474 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0004); 5475 if (ret_val) 5476 return ret_val; 5477 5478 ret_val = e1000_read_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, &phy_data); 5479 if (ret_val) 5480 return ret_val; 5481 5482 phy_data |= M88E1000_PHY_VCO_REG_BIT11; 5483 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, phy_data); 5484 if (ret_val) 5485 return ret_val; 5486 5487 ret_val = 5488 e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, default_page); 5489 if (ret_val) 5490 return ret_val; 5491 5492 return E1000_SUCCESS; 5493} 5494 5495/** 5496 * e1000_enable_mng_pass_thru - check for bmc pass through 5497 * @hw: Struct containing variables accessed by shared code 5498 * 5499 * Verifies the hardware needs to allow ARPs to be processed by the host 5500 * returns: - true/false 5501 */ 5502u32 e1000_enable_mng_pass_thru(struct e1000_hw *hw) 5503{ 5504 u32 manc; 5505 5506 if (hw->asf_firmware_present) { 5507 manc = er32(MANC); 5508 5509 if (!(manc & E1000_MANC_RCV_TCO_EN) || 5510 !(manc & E1000_MANC_EN_MAC_ADDR_FILTER)) 5511 return false; 5512 if ((manc & E1000_MANC_SMBUS_EN) && !(manc & E1000_MANC_ASF_EN)) 5513 return true; 5514 } 5515 return false; 5516} 5517 5518static s32 e1000_polarity_reversal_workaround(struct e1000_hw *hw) 5519{ 5520 s32 ret_val; 5521 u16 mii_status_reg; 5522 u16 i; 5523 5524 /* Polarity reversal workaround for forced 10F/10H links. */ 5525 5526 /* Disable the transmitter on the PHY */ 5527 5528 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0019); 5529 if (ret_val) 5530 return ret_val; 5531 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFFFF); 5532 if (ret_val) 5533 return ret_val; 5534 5535 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0000); 5536 if (ret_val) 5537 return ret_val; 5538 5539 /* This loop will early-out if the NO link condition has been met. */ 5540 for (i = PHY_FORCE_TIME; i > 0; i--) { 5541 /* Read the MII Status Register and wait for Link Status bit 5542 * to be clear. 5543 */ 5544 5545 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 5546 if (ret_val) 5547 return ret_val; 5548 5549 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 5550 if (ret_val) 5551 return ret_val; 5552 5553 if ((mii_status_reg & ~MII_SR_LINK_STATUS) == 0) 5554 break; 5555 msleep(100); 5556 } 5557 5558 /* Recommended delay time after link has been lost */ 5559 msleep(1000); 5560 5561 /* Now we will re-enable th transmitter on the PHY */ 5562 5563 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0019); 5564 if (ret_val) 5565 return ret_val; 5566 msleep(50); 5567 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFFF0); 5568 if (ret_val) 5569 return ret_val; 5570 msleep(50); 5571 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0xFF00); 5572 if (ret_val) 5573 return ret_val; 5574 msleep(50); 5575 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_GEN_CONTROL, 0x0000); 5576 if (ret_val) 5577 return ret_val; 5578 5579 ret_val = e1000_write_phy_reg(hw, M88E1000_PHY_PAGE_SELECT, 0x0000); 5580 if (ret_val) 5581 return ret_val; 5582 5583 /* This loop will early-out if the link condition has been met. */ 5584 for (i = PHY_FORCE_TIME; i > 0; i--) { 5585 /* Read the MII Status Register and wait for Link Status bit 5586 * to be set. 5587 */ 5588 5589 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 5590 if (ret_val) 5591 return ret_val; 5592 5593 ret_val = e1000_read_phy_reg(hw, PHY_STATUS, &mii_status_reg); 5594 if (ret_val) 5595 return ret_val; 5596 5597 if (mii_status_reg & MII_SR_LINK_STATUS) 5598 break; 5599 msleep(100); 5600 } 5601 return E1000_SUCCESS; 5602} 5603 5604/** 5605 * e1000_get_auto_rd_done 5606 * @hw: Struct containing variables accessed by shared code 5607 * 5608 * Check for EEPROM Auto Read bit done. 5609 * returns: - E1000_ERR_RESET if fail to reset MAC 5610 * E1000_SUCCESS at any other case. 5611 */ 5612static s32 e1000_get_auto_rd_done(struct e1000_hw *hw) 5613{ 5614 msleep(5); 5615 return E1000_SUCCESS; 5616} 5617 5618/** 5619 * e1000_get_phy_cfg_done 5620 * @hw: Struct containing variables accessed by shared code 5621 * 5622 * Checks if the PHY configuration is done 5623 * returns: - E1000_ERR_RESET if fail to reset MAC 5624 * E1000_SUCCESS at any other case. 5625 */ 5626static s32 e1000_get_phy_cfg_done(struct e1000_hw *hw) 5627{ 5628 msleep(10); 5629 return E1000_SUCCESS; 5630} 5631