1/* 2 * linux/drivers/acorn/net/ether1.c 3 * 4 * Copyright (C) 1996-2000 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * Acorn ether1 driver (82586 chip) for Acorn machines 11 * 12 * We basically keep two queues in the cards memory - one for transmit 13 * and one for receive. Each has a head and a tail. The head is where 14 * we/the chip adds packets to be transmitted/received, and the tail 15 * is where the transmitter has got to/where the receiver will stop. 16 * Both of these queues are circular, and since the chip is running 17 * all the time, we have to be careful when we modify the pointers etc 18 * so that the buffer memory contents is valid all the time. 19 * 20 * Change log: 21 * 1.00 RMK Released 22 * 1.01 RMK 19/03/1996 Transfers the last odd byte onto/off of the card now. 23 * 1.02 RMK 25/05/1997 Added code to restart RU if it goes not ready 24 * 1.03 RMK 14/09/1997 Cleaned up the handling of a reset during the TX interrupt. 25 * Should prevent lockup. 26 * 1.04 RMK 17/09/1997 Added more info when initialsation of chip goes wrong. 27 * TDR now only reports failure when chip reports non-zero 28 * TDR time-distance. 29 * 1.05 RMK 31/12/1997 Removed calls to dev_tint for 2.1 30 * 1.06 RMK 10/02/2000 Updated for 2.3.43 31 * 1.07 RMK 13/05/2000 Updated for 2.3.99-pre8 32 */ 33 34#include <linux/module.h> 35#include <linux/kernel.h> 36#include <linux/types.h> 37#include <linux/fcntl.h> 38#include <linux/interrupt.h> 39#include <linux/ioport.h> 40#include <linux/in.h> 41#include <linux/slab.h> 42#include <linux/string.h> 43#include <linux/errno.h> 44#include <linux/device.h> 45#include <linux/init.h> 46#include <linux/netdevice.h> 47#include <linux/etherdevice.h> 48#include <linux/skbuff.h> 49#include <linux/bitops.h> 50 51#include <asm/system.h> 52#include <asm/io.h> 53#include <asm/dma.h> 54#include <asm/ecard.h> 55 56#define __ETHER1_C 57#include "ether1.h" 58 59static unsigned int net_debug = NET_DEBUG; 60 61#define BUFFER_SIZE 0x10000 62#define TX_AREA_START 0x00100 63#define TX_AREA_END 0x05000 64#define RX_AREA_START 0x05000 65#define RX_AREA_END 0x0fc00 66 67static int ether1_open(struct net_device *dev); 68static int ether1_sendpacket(struct sk_buff *skb, struct net_device *dev); 69static irqreturn_t ether1_interrupt(int irq, void *dev_id); 70static int ether1_close(struct net_device *dev); 71static struct net_device_stats *ether1_getstats(struct net_device *dev); 72static void ether1_setmulticastlist(struct net_device *dev); 73static void ether1_timeout(struct net_device *dev); 74 75/* ------------------------------------------------------------------------- */ 76 77static char version[] __devinitdata = "ether1 ethernet driver (c) 2000 Russell King v1.07\n"; 78 79#define BUS_16 16 80#define BUS_8 8 81 82/* ------------------------------------------------------------------------- */ 83 84#define DISABLEIRQS 1 85#define NORMALIRQS 0 86 87#define ether1_readw(dev, addr, type, offset, svflgs) ether1_inw_p (dev, addr + (int)(&((type *)0)->offset), svflgs) 88#define ether1_writew(dev, val, addr, type, offset, svflgs) ether1_outw_p (dev, val, addr + (int)(&((type *)0)->offset), svflgs) 89 90static inline unsigned short 91ether1_inw_p (struct net_device *dev, int addr, int svflgs) 92{ 93 unsigned long flags; 94 unsigned short ret; 95 96 if (svflgs) 97 local_irq_save (flags); 98 99 writeb(addr >> 12, REG_PAGE); 100 ret = readw(ETHER1_RAM + ((addr & 4095) << 1)); 101 if (svflgs) 102 local_irq_restore (flags); 103 return ret; 104} 105 106static inline void 107ether1_outw_p (struct net_device *dev, unsigned short val, int addr, int svflgs) 108{ 109 unsigned long flags; 110 111 if (svflgs) 112 local_irq_save (flags); 113 114 writeb(addr >> 12, REG_PAGE); 115 writew(val, ETHER1_RAM + ((addr & 4095) << 1)); 116 if (svflgs) 117 local_irq_restore (flags); 118} 119 120/* 121 * Some inline assembler to allow fast transfers on to/off of the card. 122 * Since this driver depends on some features presented by the ARM 123 * specific architecture, and that you can't configure this driver 124 * without specifiing ARM mode, this is not a problem. 125 * 126 * This routine is essentially an optimised memcpy from the card's 127 * onboard RAM to kernel memory. 128 */ 129static void 130ether1_writebuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) 131{ 132 unsigned int page, thislen, offset; 133 void __iomem *addr; 134 135 offset = start & 4095; 136 page = start >> 12; 137 addr = ETHER1_RAM + (offset << 1); 138 139 if (offset + length > 4096) 140 thislen = 4096 - offset; 141 else 142 thislen = length; 143 144 do { 145 int used; 146 147 writeb(page, REG_PAGE); 148 length -= thislen; 149 150 __asm__ __volatile__( 151 "subs %3, %3, #2\n\ 152 bmi 2f\n\ 1531: ldr %0, [%1], #2\n\ 154 mov %0, %0, lsl #16\n\ 155 orr %0, %0, %0, lsr #16\n\ 156 str %0, [%2], #4\n\ 157 subs %3, %3, #2\n\ 158 bmi 2f\n\ 159 ldr %0, [%1], #2\n\ 160 mov %0, %0, lsl #16\n\ 161 orr %0, %0, %0, lsr #16\n\ 162 str %0, [%2], #4\n\ 163 subs %3, %3, #2\n\ 164 bmi 2f\n\ 165 ldr %0, [%1], #2\n\ 166 mov %0, %0, lsl #16\n\ 167 orr %0, %0, %0, lsr #16\n\ 168 str %0, [%2], #4\n\ 169 subs %3, %3, #2\n\ 170 bmi 2f\n\ 171 ldr %0, [%1], #2\n\ 172 mov %0, %0, lsl #16\n\ 173 orr %0, %0, %0, lsr #16\n\ 174 str %0, [%2], #4\n\ 175 subs %3, %3, #2\n\ 176 bpl 1b\n\ 1772: adds %3, %3, #1\n\ 178 ldreqb %0, [%1]\n\ 179 streqb %0, [%2]" 180 : "=&r" (used), "=&r" (data) 181 : "r" (addr), "r" (thislen), "1" (data)); 182 183 addr = ETHER1_RAM; 184 185 thislen = length; 186 if (thislen > 4096) 187 thislen = 4096; 188 page++; 189 } while (thislen); 190} 191 192static void 193ether1_readbuffer (struct net_device *dev, void *data, unsigned int start, unsigned int length) 194{ 195 unsigned int page, thislen, offset; 196 void __iomem *addr; 197 198 offset = start & 4095; 199 page = start >> 12; 200 addr = ETHER1_RAM + (offset << 1); 201 202 if (offset + length > 4096) 203 thislen = 4096 - offset; 204 else 205 thislen = length; 206 207 do { 208 int used; 209 210 writeb(page, REG_PAGE); 211 length -= thislen; 212 213 __asm__ __volatile__( 214 "subs %3, %3, #2\n\ 215 bmi 2f\n\ 2161: ldr %0, [%2], #4\n\ 217 strb %0, [%1], #1\n\ 218 mov %0, %0, lsr #8\n\ 219 strb %0, [%1], #1\n\ 220 subs %3, %3, #2\n\ 221 bmi 2f\n\ 222 ldr %0, [%2], #4\n\ 223 strb %0, [%1], #1\n\ 224 mov %0, %0, lsr #8\n\ 225 strb %0, [%1], #1\n\ 226 subs %3, %3, #2\n\ 227 bmi 2f\n\ 228 ldr %0, [%2], #4\n\ 229 strb %0, [%1], #1\n\ 230 mov %0, %0, lsr #8\n\ 231 strb %0, [%1], #1\n\ 232 subs %3, %3, #2\n\ 233 bmi 2f\n\ 234 ldr %0, [%2], #4\n\ 235 strb %0, [%1], #1\n\ 236 mov %0, %0, lsr #8\n\ 237 strb %0, [%1], #1\n\ 238 subs %3, %3, #2\n\ 239 bpl 1b\n\ 2402: adds %3, %3, #1\n\ 241 ldreqb %0, [%2]\n\ 242 streqb %0, [%1]" 243 : "=&r" (used), "=&r" (data) 244 : "r" (addr), "r" (thislen), "1" (data)); 245 246 addr = ETHER1_RAM; 247 248 thislen = length; 249 if (thislen > 4096) 250 thislen = 4096; 251 page++; 252 } while (thislen); 253} 254 255static int __devinit 256ether1_ramtest(struct net_device *dev, unsigned char byte) 257{ 258 unsigned char *buffer = kmalloc (BUFFER_SIZE, GFP_KERNEL); 259 int i, ret = BUFFER_SIZE; 260 int max_errors = 15; 261 int bad = -1; 262 int bad_start = 0; 263 264 if (!buffer) 265 return 1; 266 267 memset (buffer, byte, BUFFER_SIZE); 268 ether1_writebuffer (dev, buffer, 0, BUFFER_SIZE); 269 memset (buffer, byte ^ 0xff, BUFFER_SIZE); 270 ether1_readbuffer (dev, buffer, 0, BUFFER_SIZE); 271 272 for (i = 0; i < BUFFER_SIZE; i++) { 273 if (buffer[i] != byte) { 274 if (max_errors >= 0 && bad != buffer[i]) { 275 if (bad != -1) 276 printk ("\n"); 277 printk (KERN_CRIT "%s: RAM failed with (%02X instead of %02X) at 0x%04X", 278 dev->name, buffer[i], byte, i); 279 ret = -ENODEV; 280 max_errors --; 281 bad = buffer[i]; 282 bad_start = i; 283 } 284 } else { 285 if (bad != -1) { 286 if (bad_start == i - 1) 287 printk ("\n"); 288 else 289 printk (" - 0x%04X\n", i - 1); 290 bad = -1; 291 } 292 } 293 } 294 295 if (bad != -1) 296 printk (" - 0x%04X\n", BUFFER_SIZE); 297 kfree (buffer); 298 299 return ret; 300} 301 302static int 303ether1_reset (struct net_device *dev) 304{ 305 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 306 return BUS_16; 307} 308 309static int __devinit 310ether1_init_2(struct net_device *dev) 311{ 312 int i; 313 dev->mem_start = 0; 314 315 i = ether1_ramtest (dev, 0x5a); 316 317 if (i > 0) 318 i = ether1_ramtest (dev, 0x1e); 319 320 if (i <= 0) 321 return -ENODEV; 322 323 dev->mem_end = i; 324 return 0; 325} 326 327/* 328 * These are the structures that are loaded into the ether RAM card to 329 * initialise the 82586 330 */ 331 332/* at 0x0100 */ 333#define NOP_ADDR (TX_AREA_START) 334#define NOP_SIZE (0x06) 335static nop_t init_nop = { 336 0, 337 CMD_NOP, 338 NOP_ADDR 339}; 340 341/* at 0x003a */ 342#define TDR_ADDR (0x003a) 343#define TDR_SIZE (0x08) 344static tdr_t init_tdr = { 345 0, 346 CMD_TDR | CMD_INTR, 347 NOP_ADDR, 348 0 349}; 350 351/* at 0x002e */ 352#define MC_ADDR (0x002e) 353#define MC_SIZE (0x0c) 354static mc_t init_mc = { 355 0, 356 CMD_SETMULTICAST, 357 TDR_ADDR, 358 0, 359 { { 0, } } 360}; 361 362/* at 0x0022 */ 363#define SA_ADDR (0x0022) 364#define SA_SIZE (0x0c) 365static sa_t init_sa = { 366 0, 367 CMD_SETADDRESS, 368 MC_ADDR, 369 { 0, } 370}; 371 372/* at 0x0010 */ 373#define CFG_ADDR (0x0010) 374#define CFG_SIZE (0x12) 375static cfg_t init_cfg = { 376 0, 377 CMD_CONFIG, 378 SA_ADDR, 379 8, 380 8, 381 CFG8_SRDY, 382 CFG9_PREAMB8 | CFG9_ADDRLENBUF | CFG9_ADDRLEN(6), 383 0, 384 0x60, 385 0, 386 CFG13_RETRY(15) | CFG13_SLOTH(2), 387 0, 388}; 389 390/* at 0x0000 */ 391#define SCB_ADDR (0x0000) 392#define SCB_SIZE (0x10) 393static scb_t init_scb = { 394 0, 395 SCB_CMDACKRNR | SCB_CMDACKCNA | SCB_CMDACKFR | SCB_CMDACKCX, 396 CFG_ADDR, 397 RX_AREA_START, 398 0, 399 0, 400 0, 401 0 402}; 403 404/* at 0xffee */ 405#define ISCP_ADDR (0xffee) 406#define ISCP_SIZE (0x08) 407static iscp_t init_iscp = { 408 1, 409 SCB_ADDR, 410 0x0000, 411 0x0000 412}; 413 414/* at 0xfff6 */ 415#define SCP_ADDR (0xfff6) 416#define SCP_SIZE (0x0a) 417static scp_t init_scp = { 418 SCP_SY_16BBUS, 419 { 0, 0 }, 420 ISCP_ADDR, 421 0 422}; 423 424#define RFD_SIZE (0x16) 425static rfd_t init_rfd = { 426 0, 427 0, 428 0, 429 0, 430 { 0, }, 431 { 0, }, 432 0 433}; 434 435#define RBD_SIZE (0x0a) 436static rbd_t init_rbd = { 437 0, 438 0, 439 0, 440 0, 441 ETH_FRAME_LEN + 8 442}; 443 444#define TX_SIZE (0x08) 445#define TBD_SIZE (0x08) 446 447static int 448ether1_init_for_open (struct net_device *dev) 449{ 450 int i, status, addr, next, next2; 451 int failures = 0; 452 unsigned long timeout; 453 454 writeb(CTRL_RST|CTRL_ACK, REG_CONTROL); 455 456 for (i = 0; i < 6; i++) 457 init_sa.sa_addr[i] = dev->dev_addr[i]; 458 459 /* load data structures into ether1 RAM */ 460 ether1_writebuffer (dev, &init_scp, SCP_ADDR, SCP_SIZE); 461 ether1_writebuffer (dev, &init_iscp, ISCP_ADDR, ISCP_SIZE); 462 ether1_writebuffer (dev, &init_scb, SCB_ADDR, SCB_SIZE); 463 ether1_writebuffer (dev, &init_cfg, CFG_ADDR, CFG_SIZE); 464 ether1_writebuffer (dev, &init_sa, SA_ADDR, SA_SIZE); 465 ether1_writebuffer (dev, &init_mc, MC_ADDR, MC_SIZE); 466 ether1_writebuffer (dev, &init_tdr, TDR_ADDR, TDR_SIZE); 467 ether1_writebuffer (dev, &init_nop, NOP_ADDR, NOP_SIZE); 468 469 if (ether1_readw(dev, CFG_ADDR, cfg_t, cfg_command, NORMALIRQS) != CMD_CONFIG) { 470 printk (KERN_ERR "%s: detected either RAM fault or compiler bug\n", 471 dev->name); 472 return 1; 473 } 474 475 /* 476 * setup circularly linked list of { rfd, rbd, buffer }, with 477 * all rfds circularly linked, rbds circularly linked. 478 * First rfd is linked to scp, first rbd is linked to first 479 * rfd. Last rbd has a suspend command. 480 */ 481 addr = RX_AREA_START; 482 do { 483 next = addr + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; 484 next2 = next + RFD_SIZE + RBD_SIZE + ETH_FRAME_LEN + 10; 485 486 if (next2 >= RX_AREA_END) { 487 next = RX_AREA_START; 488 init_rfd.rfd_command = RFD_CMDEL | RFD_CMDSUSPEND; 489 priv(dev)->rx_tail = addr; 490 } else 491 init_rfd.rfd_command = 0; 492 if (addr == RX_AREA_START) 493 init_rfd.rfd_rbdoffset = addr + RFD_SIZE; 494 else 495 init_rfd.rfd_rbdoffset = 0; 496 init_rfd.rfd_link = next; 497 init_rbd.rbd_link = next + RFD_SIZE; 498 init_rbd.rbd_bufl = addr + RFD_SIZE + RBD_SIZE; 499 500 ether1_writebuffer (dev, &init_rfd, addr, RFD_SIZE); 501 ether1_writebuffer (dev, &init_rbd, addr + RFD_SIZE, RBD_SIZE); 502 addr = next; 503 } while (next2 < RX_AREA_END); 504 505 priv(dev)->tx_link = NOP_ADDR; 506 priv(dev)->tx_head = NOP_ADDR + NOP_SIZE; 507 priv(dev)->tx_tail = TDR_ADDR; 508 priv(dev)->rx_head = RX_AREA_START; 509 510 /* release reset & give 586 a prod */ 511 priv(dev)->resetting = 1; 512 priv(dev)->initialising = 1; 513 writeb(CTRL_RST, REG_CONTROL); 514 writeb(0, REG_CONTROL); 515 writeb(CTRL_CA, REG_CONTROL); 516 517 /* 586 should now unset iscp.busy */ 518 timeout = jiffies + HZ/2; 519 while (ether1_readw(dev, ISCP_ADDR, iscp_t, iscp_busy, DISABLEIRQS) == 1) { 520 if (time_after(jiffies, timeout)) { 521 printk (KERN_WARNING "%s: can't initialise 82586: iscp is busy\n", dev->name); 522 return 1; 523 } 524 } 525 526 /* check status of commands that we issued */ 527 timeout += HZ/10; 528 while (((status = ether1_readw(dev, CFG_ADDR, cfg_t, cfg_status, DISABLEIRQS)) 529 & STAT_COMPLETE) == 0) { 530 if (time_after(jiffies, timeout)) 531 break; 532 } 533 534 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 535 printk (KERN_WARNING "%s: can't initialise 82586: config status %04X\n", dev->name, status); 536 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 537 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 538 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 539 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 540 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 541 failures += 1; 542 } 543 544 timeout += HZ/10; 545 while (((status = ether1_readw(dev, SA_ADDR, sa_t, sa_status, DISABLEIRQS)) 546 & STAT_COMPLETE) == 0) { 547 if (time_after(jiffies, timeout)) 548 break; 549 } 550 551 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 552 printk (KERN_WARNING "%s: can't initialise 82586: set address status %04X\n", dev->name, status); 553 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 554 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 555 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 556 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 557 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 558 failures += 1; 559 } 560 561 timeout += HZ/10; 562 while (((status = ether1_readw(dev, MC_ADDR, mc_t, mc_status, DISABLEIRQS)) 563 & STAT_COMPLETE) == 0) { 564 if (time_after(jiffies, timeout)) 565 break; 566 } 567 568 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 569 printk (KERN_WARNING "%s: can't initialise 82586: set multicast status %04X\n", dev->name, status); 570 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 571 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 572 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 573 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 574 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 575 failures += 1; 576 } 577 578 timeout += HZ; 579 while (((status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_status, DISABLEIRQS)) 580 & STAT_COMPLETE) == 0) { 581 if (time_after(jiffies, timeout)) 582 break; 583 } 584 585 if ((status & (STAT_COMPLETE | STAT_OK)) != (STAT_COMPLETE | STAT_OK)) { 586 printk (KERN_WARNING "%s: can't tdr (ignored)\n", dev->name); 587 printk (KERN_DEBUG "%s: SCB=[STS=%04X CMD=%04X CBL=%04X RFA=%04X]\n", dev->name, 588 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS), 589 ether1_readw(dev, SCB_ADDR, scb_t, scb_command, NORMALIRQS), 590 ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS), 591 ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, NORMALIRQS)); 592 } else { 593 status = ether1_readw(dev, TDR_ADDR, tdr_t, tdr_result, DISABLEIRQS); 594 if (status & TDR_XCVRPROB) 595 printk (KERN_WARNING "%s: i/f failed tdr: transceiver problem\n", dev->name); 596 else if ((status & (TDR_SHORT|TDR_OPEN)) && (status & TDR_TIME)) { 597#ifdef FANCY 598 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d.%d us away\n", dev->name, 599 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME) / 10, 600 (status & TDR_TIME) % 10); 601#else 602 printk (KERN_WARNING "%s: i/f failed tdr: cable %s %d clks away\n", dev->name, 603 status & TDR_SHORT ? "short" : "open", (status & TDR_TIME)); 604#endif 605 } 606 } 607 608 if (failures) 609 ether1_reset (dev); 610 return failures ? 1 : 0; 611} 612 613/* ------------------------------------------------------------------------- */ 614 615static int 616ether1_txalloc (struct net_device *dev, int size) 617{ 618 int start, tail; 619 620 size = (size + 1) & ~1; 621 tail = priv(dev)->tx_tail; 622 623 if (priv(dev)->tx_head + size > TX_AREA_END) { 624 if (tail > priv(dev)->tx_head) 625 return -1; 626 start = TX_AREA_START; 627 if (start + size > tail) 628 return -1; 629 priv(dev)->tx_head = start + size; 630 } else { 631 if (priv(dev)->tx_head < tail && (priv(dev)->tx_head + size) > tail) 632 return -1; 633 start = priv(dev)->tx_head; 634 priv(dev)->tx_head += size; 635 } 636 637 return start; 638} 639 640static int 641ether1_open (struct net_device *dev) 642{ 643 if (!is_valid_ether_addr(dev->dev_addr)) { 644 printk(KERN_WARNING "%s: invalid ethernet MAC address\n", 645 dev->name); 646 return -EINVAL; 647 } 648 649 if (request_irq(dev->irq, ether1_interrupt, 0, "ether1", dev)) 650 return -EAGAIN; 651 652 memset (&priv(dev)->stats, 0, sizeof (struct net_device_stats)); 653 654 if (ether1_init_for_open (dev)) { 655 free_irq (dev->irq, dev); 656 return -EAGAIN; 657 } 658 659 netif_start_queue(dev); 660 661 return 0; 662} 663 664static void 665ether1_timeout(struct net_device *dev) 666{ 667 printk(KERN_WARNING "%s: transmit timeout, network cable problem?\n", 668 dev->name); 669 printk(KERN_WARNING "%s: resetting device\n", dev->name); 670 671 ether1_reset (dev); 672 673 if (ether1_init_for_open (dev)) 674 printk (KERN_ERR "%s: unable to restart interface\n", dev->name); 675 676 priv(dev)->stats.tx_errors++; 677 netif_wake_queue(dev); 678} 679 680static int 681ether1_sendpacket (struct sk_buff *skb, struct net_device *dev) 682{ 683 int tmp, tst, nopaddr, txaddr, tbdaddr, dataddr; 684 unsigned long flags; 685 tx_t tx; 686 tbd_t tbd; 687 nop_t nop; 688 689 if (priv(dev)->restart) { 690 printk(KERN_WARNING "%s: resetting device\n", dev->name); 691 692 ether1_reset(dev); 693 694 if (ether1_init_for_open(dev)) 695 printk(KERN_ERR "%s: unable to restart interface\n", dev->name); 696 else 697 priv(dev)->restart = 0; 698 } 699 700 if (skb->len < ETH_ZLEN) { 701 if (skb_padto(skb, ETH_ZLEN)) 702 goto out; 703 } 704 705 /* 706 * insert packet followed by a nop 707 */ 708 txaddr = ether1_txalloc (dev, TX_SIZE); 709 tbdaddr = ether1_txalloc (dev, TBD_SIZE); 710 dataddr = ether1_txalloc (dev, skb->len); 711 nopaddr = ether1_txalloc (dev, NOP_SIZE); 712 713 tx.tx_status = 0; 714 tx.tx_command = CMD_TX | CMD_INTR; 715 tx.tx_link = nopaddr; 716 tx.tx_tbdoffset = tbdaddr; 717 tbd.tbd_opts = TBD_EOL | skb->len; 718 tbd.tbd_link = I82586_NULL; 719 tbd.tbd_bufl = dataddr; 720 tbd.tbd_bufh = 0; 721 nop.nop_status = 0; 722 nop.nop_command = CMD_NOP; 723 nop.nop_link = nopaddr; 724 725 local_irq_save(flags); 726 ether1_writebuffer (dev, &tx, txaddr, TX_SIZE); 727 ether1_writebuffer (dev, &tbd, tbdaddr, TBD_SIZE); 728 ether1_writebuffer (dev, skb->data, dataddr, skb->len); 729 ether1_writebuffer (dev, &nop, nopaddr, NOP_SIZE); 730 tmp = priv(dev)->tx_link; 731 priv(dev)->tx_link = nopaddr; 732 733 /* now reset the previous nop pointer */ 734 ether1_writew(dev, txaddr, tmp, nop_t, nop_link, NORMALIRQS); 735 736 local_irq_restore(flags); 737 738 /* handle transmit */ 739 740 /* check to see if we have room for a full sized ether frame */ 741 tmp = priv(dev)->tx_head; 742 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 743 priv(dev)->tx_head = tmp; 744 dev_kfree_skb (skb); 745 746 if (tst == -1) 747 netif_stop_queue(dev); 748 749 out: 750 return NETDEV_TX_OK; 751} 752 753static void 754ether1_xmit_done (struct net_device *dev) 755{ 756 nop_t nop; 757 int caddr, tst; 758 759 caddr = priv(dev)->tx_tail; 760 761again: 762 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 763 764 switch (nop.nop_command & CMD_MASK) { 765 case CMD_TDR: 766 /* special case */ 767 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 768 != (unsigned short)I82586_NULL) { 769 ether1_writew(dev, SCB_CMDCUCSTART | SCB_CMDRXSTART, SCB_ADDR, scb_t, 770 scb_command, NORMALIRQS); 771 writeb(CTRL_CA, REG_CONTROL); 772 } 773 priv(dev)->tx_tail = NOP_ADDR; 774 return; 775 776 case CMD_NOP: 777 if (nop.nop_link == caddr) { 778 if (priv(dev)->initialising == 0) 779 printk (KERN_WARNING "%s: strange command complete with no tx command!\n", dev->name); 780 else 781 priv(dev)->initialising = 0; 782 return; 783 } 784 if (caddr == nop.nop_link) 785 return; 786 caddr = nop.nop_link; 787 goto again; 788 789 case CMD_TX: 790 if (nop.nop_status & STAT_COMPLETE) 791 break; 792 printk (KERN_ERR "%s: strange command complete without completed command\n", dev->name); 793 priv(dev)->restart = 1; 794 return; 795 796 default: 797 printk (KERN_WARNING "%s: strange command %d complete! (offset %04X)", dev->name, 798 nop.nop_command & CMD_MASK, caddr); 799 priv(dev)->restart = 1; 800 return; 801 } 802 803 while (nop.nop_status & STAT_COMPLETE) { 804 if (nop.nop_status & STAT_OK) { 805 priv(dev)->stats.tx_packets ++; 806 priv(dev)->stats.collisions += (nop.nop_status & STAT_COLLISIONS); 807 } else { 808 priv(dev)->stats.tx_errors ++; 809 810 if (nop.nop_status & STAT_COLLAFTERTX) 811 priv(dev)->stats.collisions ++; 812 if (nop.nop_status & STAT_NOCARRIER) 813 priv(dev)->stats.tx_carrier_errors ++; 814 if (nop.nop_status & STAT_TXLOSTCTS) 815 printk (KERN_WARNING "%s: cts lost\n", dev->name); 816 if (nop.nop_status & STAT_TXSLOWDMA) 817 priv(dev)->stats.tx_fifo_errors ++; 818 if (nop.nop_status & STAT_COLLEXCESSIVE) 819 priv(dev)->stats.collisions += 16; 820 } 821 822 if (nop.nop_link == caddr) { 823 printk (KERN_ERR "%s: tx buffer chaining error: tx command points to itself\n", dev->name); 824 break; 825 } 826 827 caddr = nop.nop_link; 828 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 829 if ((nop.nop_command & CMD_MASK) != CMD_NOP) { 830 printk (KERN_ERR "%s: tx buffer chaining error: no nop after tx command\n", dev->name); 831 break; 832 } 833 834 if (caddr == nop.nop_link) 835 break; 836 837 caddr = nop.nop_link; 838 ether1_readbuffer (dev, &nop, caddr, NOP_SIZE); 839 if ((nop.nop_command & CMD_MASK) != CMD_TX) { 840 printk (KERN_ERR "%s: tx buffer chaining error: no tx command after nop\n", dev->name); 841 break; 842 } 843 } 844 priv(dev)->tx_tail = caddr; 845 846 caddr = priv(dev)->tx_head; 847 tst = ether1_txalloc (dev, TX_SIZE + TBD_SIZE + NOP_SIZE + ETH_FRAME_LEN); 848 priv(dev)->tx_head = caddr; 849 if (tst != -1) 850 netif_wake_queue(dev); 851} 852 853static void 854ether1_recv_done (struct net_device *dev) 855{ 856 int status; 857 int nexttail, rbdaddr; 858 rbd_t rbd; 859 860 do { 861 status = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_status, NORMALIRQS); 862 if ((status & RFD_COMPLETE) == 0) 863 break; 864 865 rbdaddr = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_rbdoffset, NORMALIRQS); 866 ether1_readbuffer (dev, &rbd, rbdaddr, RBD_SIZE); 867 868 if ((rbd.rbd_status & (RBD_EOF | RBD_ACNTVALID)) == (RBD_EOF | RBD_ACNTVALID)) { 869 int length = rbd.rbd_status & RBD_ACNT; 870 struct sk_buff *skb; 871 872 length = (length + 1) & ~1; 873 skb = dev_alloc_skb (length + 2); 874 875 if (skb) { 876 skb_reserve (skb, 2); 877 878 ether1_readbuffer (dev, skb_put (skb, length), rbd.rbd_bufl, length); 879 880 skb->protocol = eth_type_trans (skb, dev); 881 netif_rx (skb); 882 priv(dev)->stats.rx_packets ++; 883 } else 884 priv(dev)->stats.rx_dropped ++; 885 } else { 886 printk(KERN_WARNING "%s: %s\n", dev->name, 887 (rbd.rbd_status & RBD_EOF) ? "oversized packet" : "acnt not valid"); 888 priv(dev)->stats.rx_dropped ++; 889 } 890 891 nexttail = ether1_readw(dev, priv(dev)->rx_tail, rfd_t, rfd_link, NORMALIRQS); 892 /* nexttail should be rx_head */ 893 if (nexttail != priv(dev)->rx_head) 894 printk(KERN_ERR "%s: receiver buffer chaining error (%04X != %04X)\n", 895 dev->name, nexttail, priv(dev)->rx_head); 896 ether1_writew(dev, RFD_CMDEL | RFD_CMDSUSPEND, nexttail, rfd_t, rfd_command, NORMALIRQS); 897 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_command, NORMALIRQS); 898 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_status, NORMALIRQS); 899 ether1_writew(dev, 0, priv(dev)->rx_tail, rfd_t, rfd_rbdoffset, NORMALIRQS); 900 901 priv(dev)->rx_tail = nexttail; 902 priv(dev)->rx_head = ether1_readw(dev, priv(dev)->rx_head, rfd_t, rfd_link, NORMALIRQS); 903 } while (1); 904} 905 906static irqreturn_t 907ether1_interrupt (int irq, void *dev_id) 908{ 909 struct net_device *dev = (struct net_device *)dev_id; 910 int status; 911 912 status = ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS); 913 914 if (status) { 915 ether1_writew(dev, status & (SCB_STRNR | SCB_STCNA | SCB_STFR | SCB_STCX), 916 SCB_ADDR, scb_t, scb_command, NORMALIRQS); 917 writeb(CTRL_CA | CTRL_ACK, REG_CONTROL); 918 if (status & SCB_STCX) { 919 ether1_xmit_done (dev); 920 } 921 if (status & SCB_STCNA) { 922 if (priv(dev)->resetting == 0) 923 printk (KERN_WARNING "%s: CU went not ready ???\n", dev->name); 924 else 925 priv(dev)->resetting += 1; 926 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_cbl_offset, NORMALIRQS) 927 != (unsigned short)I82586_NULL) { 928 ether1_writew(dev, SCB_CMDCUCSTART, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 929 writeb(CTRL_CA, REG_CONTROL); 930 } 931 if (priv(dev)->resetting == 2) 932 priv(dev)->resetting = 0; 933 } 934 if (status & SCB_STFR) { 935 ether1_recv_done (dev); 936 } 937 if (status & SCB_STRNR) { 938 if (ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS) & SCB_STRXSUSP) { 939 printk (KERN_WARNING "%s: RU went not ready: RU suspended\n", dev->name); 940 ether1_writew(dev, SCB_CMDRXRESUME, SCB_ADDR, scb_t, scb_command, NORMALIRQS); 941 writeb(CTRL_CA, REG_CONTROL); 942 priv(dev)->stats.rx_dropped ++; /* we suspended due to lack of buffer space */ 943 } else 944 printk(KERN_WARNING "%s: RU went not ready: %04X\n", dev->name, 945 ether1_readw(dev, SCB_ADDR, scb_t, scb_status, NORMALIRQS)); 946 printk (KERN_WARNING "RU ptr = %04X\n", ether1_readw(dev, SCB_ADDR, scb_t, scb_rfa_offset, 947 NORMALIRQS)); 948 } 949 } else 950 writeb(CTRL_ACK, REG_CONTROL); 951 952 return IRQ_HANDLED; 953} 954 955static int 956ether1_close (struct net_device *dev) 957{ 958 ether1_reset (dev); 959 960 free_irq(dev->irq, dev); 961 962 return 0; 963} 964 965static struct net_device_stats * 966ether1_getstats (struct net_device *dev) 967{ 968 return &priv(dev)->stats; 969} 970 971/* 972 * Set or clear the multicast filter for this adaptor. 973 * num_addrs == -1 Promiscuous mode, receive all packets. 974 * num_addrs == 0 Normal mode, clear multicast list. 975 * num_addrs > 0 Multicast mode, receive normal and MC packets, and do 976 * best-effort filtering. 977 */ 978static void 979ether1_setmulticastlist (struct net_device *dev) 980{ 981} 982 983/* ------------------------------------------------------------------------- */ 984 985static void __devinit ether1_banner(void) 986{ 987 static unsigned int version_printed = 0; 988 989 if (net_debug && version_printed++ == 0) 990 printk(KERN_INFO "%s", version); 991} 992 993static const struct net_device_ops ether1_netdev_ops = { 994 .ndo_open = ether1_open, 995 .ndo_stop = ether1_close, 996 .ndo_start_xmit = ether1_sendpacket, 997 .ndo_get_stats = ether1_getstats, 998 .ndo_set_multicast_list = ether1_setmulticastlist, 999 .ndo_tx_timeout = ether1_timeout, 1000 .ndo_validate_addr = eth_validate_addr, 1001 .ndo_change_mtu = eth_change_mtu, 1002 .ndo_set_mac_address = eth_mac_addr, 1003}; 1004 1005static int __devinit 1006ether1_probe(struct expansion_card *ec, const struct ecard_id *id) 1007{ 1008 struct net_device *dev; 1009 int i, ret = 0; 1010 1011 ether1_banner(); 1012 1013 ret = ecard_request_resources(ec); 1014 if (ret) 1015 goto out; 1016 1017 dev = alloc_etherdev(sizeof(struct ether1_priv)); 1018 if (!dev) { 1019 ret = -ENOMEM; 1020 goto release; 1021 } 1022 1023 SET_NETDEV_DEV(dev, &ec->dev); 1024 1025 dev->irq = ec->irq; 1026 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0); 1027 if (!priv(dev)->base) { 1028 ret = -ENOMEM; 1029 goto free; 1030 } 1031 1032 if ((priv(dev)->bus_type = ether1_reset(dev)) == 0) { 1033 ret = -ENODEV; 1034 goto free; 1035 } 1036 1037 for (i = 0; i < 6; i++) 1038 dev->dev_addr[i] = readb(IDPROM_ADDRESS + (i << 2)); 1039 1040 if (ether1_init_2(dev)) { 1041 ret = -ENODEV; 1042 goto free; 1043 } 1044 1045 dev->netdev_ops = ðer1_netdev_ops; 1046 dev->watchdog_timeo = 5 * HZ / 100; 1047 1048 ret = register_netdev(dev); 1049 if (ret) 1050 goto free; 1051 1052 printk(KERN_INFO "%s: ether1 in slot %d, %pM\n", 1053 dev->name, ec->slot_no, dev->dev_addr); 1054 1055 ecard_set_drvdata(ec, dev); 1056 return 0; 1057 1058 free: 1059 free_netdev(dev); 1060 release: 1061 ecard_release_resources(ec); 1062 out: 1063 return ret; 1064} 1065 1066static void __devexit ether1_remove(struct expansion_card *ec) 1067{ 1068 struct net_device *dev = ecard_get_drvdata(ec); 1069 1070 ecard_set_drvdata(ec, NULL); 1071 1072 unregister_netdev(dev); 1073 free_netdev(dev); 1074 ecard_release_resources(ec); 1075} 1076 1077static const struct ecard_id ether1_ids[] = { 1078 { MANU_ACORN, PROD_ACORN_ETHER1 }, 1079 { 0xffff, 0xffff } 1080}; 1081 1082static struct ecard_driver ether1_driver = { 1083 .probe = ether1_probe, 1084 .remove = __devexit_p(ether1_remove), 1085 .id_table = ether1_ids, 1086 .drv = { 1087 .name = "ether1", 1088 }, 1089}; 1090 1091static int __init ether1_init(void) 1092{ 1093 return ecard_register_driver(ðer1_driver); 1094} 1095 1096static void __exit ether1_exit(void) 1097{ 1098 ecard_remove_driver(ðer1_driver); 1099} 1100 1101module_init(ether1_init); 1102module_exit(ether1_exit); 1103 1104MODULE_LICENSE("GPL"); 1105