1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * icom.c 4 * 5 * Copyright (C) 2001 IBM Corporation. All rights reserved. 6 * 7 * Serial device driver. 8 * 9 * Based on code from serial.c 10 */ 11#include <linux/module.h> 12#include <linux/kernel.h> 13#include <linux/errno.h> 14#include <linux/signal.h> 15#include <linux/timer.h> 16#include <linux/interrupt.h> 17#include <linux/tty.h> 18#include <linux/termios.h> 19#include <linux/fs.h> 20#include <linux/tty_flip.h> 21#include <linux/serial.h> 22#include <linux/serial_core.h> 23#include <linux/serial_reg.h> 24#include <linux/major.h> 25#include <linux/string.h> 26#include <linux/fcntl.h> 27#include <linux/ptrace.h> 28#include <linux/ioport.h> 29#include <linux/mm.h> 30#include <linux/slab.h> 31#include <linux/init.h> 32#include <linux/delay.h> 33#include <linux/pci.h> 34#include <linux/vmalloc.h> 35#include <linux/smp.h> 36#include <linux/spinlock.h> 37#include <linux/kref.h> 38#include <linux/firmware.h> 39#include <linux/bitops.h> 40 41#include <linux/io.h> 42#include <asm/irq.h> 43#include <linux/uaccess.h> 44 45/*#define ICOM_TRACE enable port trace capabilities */ 46 47#define ICOM_DRIVER_NAME "icom" 48#define NR_PORTS 128 49 50static const unsigned int icom_acfg_baud[] = { 51 300, 52 600, 53 900, 54 1200, 55 1800, 56 2400, 57 3600, 58 4800, 59 7200, 60 9600, 61 14400, 62 19200, 63 28800, 64 38400, 65 57600, 66 76800, 67 115200, 68 153600, 69 230400, 70 307200, 71 460800, 72}; 73#define BAUD_TABLE_LIMIT (ARRAY_SIZE(icom_acfg_baud) - 1) 74 75struct icom_regs { 76 u32 control; /* Adapter Control Register */ 77 u32 interrupt; /* Adapter Interrupt Register */ 78 u32 int_mask; /* Adapter Interrupt Mask Reg */ 79 u32 int_pri; /* Adapter Interrupt Priority r */ 80 u32 int_reg_b; /* Adapter non-masked Interrupt */ 81 u32 resvd01; 82 u32 resvd02; 83 u32 resvd03; 84 u32 control_2; /* Adapter Control Register 2 */ 85 u32 interrupt_2; /* Adapter Interrupt Register 2 */ 86 u32 int_mask_2; /* Adapter Interrupt Mask 2 */ 87 u32 int_pri_2; /* Adapter Interrupt Prior 2 */ 88 u32 int_reg_2b; /* Adapter non-masked 2 */ 89}; 90 91struct func_dram { 92 u32 reserved[108]; /* 0-1B0 reserved by personality code */ 93 u32 RcvStatusAddr; /* 1B0-1B3 Status Address for Next rcv */ 94 u8 RcvStnAddr; /* 1B4 Receive Station Addr */ 95 u8 IdleState; /* 1B5 Idle State */ 96 u8 IdleMonitor; /* 1B6 Idle Monitor */ 97 u8 FlagFillIdleTimer; /* 1B7 Flag Fill Idle Timer */ 98 u32 XmitStatusAddr; /* 1B8-1BB Transmit Status Address */ 99 u8 StartXmitCmd; /* 1BC Start Xmit Command */ 100 u8 HDLCConfigReg; /* 1BD Reserved */ 101 u8 CauseCode; /* 1BE Cause code for fatal error */ 102 u8 xchar; /* 1BF High priority send */ 103 u32 reserved3; /* 1C0-1C3 Reserved */ 104 u8 PrevCmdReg; /* 1C4 Reserved */ 105 u8 CmdReg; /* 1C5 Command Register */ 106 u8 async_config2; /* 1C6 Async Config Byte 2 */ 107 u8 async_config3; /* 1C7 Async Config Byte 3 */ 108 u8 dce_resvd[20]; /* 1C8-1DB DCE Rsvd */ 109 u8 dce_resvd21; /* 1DC DCE Rsvd (21st byte */ 110 u8 misc_flags; /* 1DD misc flags */ 111#define V2_HARDWARE 0x40 112#define ICOM_HDW_ACTIVE 0x01 113 u8 call_length; /* 1DE Phone #/CFI buff ln */ 114 u8 call_length2; /* 1DF Upper byte (unused) */ 115 u32 call_addr; /* 1E0-1E3 Phn #/CFI buff addr */ 116 u16 timer_value; /* 1E4-1E5 general timer value */ 117 u8 timer_command; /* 1E6 general timer cmd */ 118 u8 dce_command; /* 1E7 dce command reg */ 119 u8 dce_cmd_status; /* 1E8 dce command stat */ 120 u8 x21_r1_ioff; /* 1E9 dce ready counter */ 121 u8 x21_r0_ioff; /* 1EA dce not ready ctr */ 122 u8 x21_ralt_ioff; /* 1EB dce CNR counter */ 123 u8 x21_r1_ion; /* 1EC dce ready I on ctr */ 124 u8 rsvd_ier; /* 1ED Rsvd for IER (if ne */ 125 u8 ier; /* 1EE Interrupt Enable */ 126 u8 isr; /* 1EF Input Signal Reg */ 127 u8 osr; /* 1F0 Output Signal Reg */ 128 u8 reset; /* 1F1 Reset/Reload Reg */ 129 u8 disable; /* 1F2 Disable Reg */ 130 u8 sync; /* 1F3 Sync Reg */ 131 u8 error_stat; /* 1F4 Error Status */ 132 u8 cable_id; /* 1F5 Cable ID */ 133 u8 cs_length; /* 1F6 CS Load Length */ 134 u8 mac_length; /* 1F7 Mac Load Length */ 135 u32 cs_load_addr; /* 1F8-1FB Call Load PCI Addr */ 136 u32 mac_load_addr; /* 1FC-1FF Mac Load PCI Addr */ 137}; 138 139/* 140 * adapter defines and structures 141 */ 142#define ICOM_CONTROL_START_A 0x00000008 143#define ICOM_CONTROL_STOP_A 0x00000004 144#define ICOM_CONTROL_START_B 0x00000002 145#define ICOM_CONTROL_STOP_B 0x00000001 146#define ICOM_CONTROL_START_C 0x00000008 147#define ICOM_CONTROL_STOP_C 0x00000004 148#define ICOM_CONTROL_START_D 0x00000002 149#define ICOM_CONTROL_STOP_D 0x00000001 150#define ICOM_IRAM_OFFSET 0x1000 151#define ICOM_IRAM_SIZE 0x0C00 152#define ICOM_DCE_IRAM_OFFSET 0x0A00 153#define ICOM_CABLE_ID_VALID 0x01 154#define ICOM_CABLE_ID_MASK 0xF0 155#define ICOM_DISABLE 0x80 156#define CMD_XMIT_RCV_ENABLE 0xC0 157#define CMD_XMIT_ENABLE 0x40 158#define CMD_RCV_DISABLE 0x00 159#define CMD_RCV_ENABLE 0x80 160#define CMD_RESTART 0x01 161#define CMD_HOLD_XMIT 0x02 162#define CMD_SND_BREAK 0x04 163#define RS232_CABLE 0x06 164#define V24_CABLE 0x0E 165#define V35_CABLE 0x0C 166#define V36_CABLE 0x02 167#define NO_CABLE 0x00 168#define START_DOWNLOAD 0x80 169#define ICOM_INT_MASK_PRC_A 0x00003FFF 170#define ICOM_INT_MASK_PRC_B 0x3FFF0000 171#define ICOM_INT_MASK_PRC_C 0x00003FFF 172#define ICOM_INT_MASK_PRC_D 0x3FFF0000 173#define INT_RCV_COMPLETED 0x1000 174#define INT_XMIT_COMPLETED 0x2000 175#define INT_IDLE_DETECT 0x0800 176#define INT_RCV_DISABLED 0x0400 177#define INT_XMIT_DISABLED 0x0200 178#define INT_RCV_XMIT_SHUTDOWN 0x0100 179#define INT_FATAL_ERROR 0x0080 180#define INT_CABLE_PULL 0x0020 181#define INT_SIGNAL_CHANGE 0x0010 182#define HDLC_PPP_PURE_ASYNC 0x02 183#define HDLC_FF_FILL 0x00 184#define HDLC_HDW_FLOW 0x01 185#define START_XMIT 0x80 186#define ICOM_ACFG_DRIVE1 0x20 187#define ICOM_ACFG_NO_PARITY 0x00 188#define ICOM_ACFG_PARITY_ENAB 0x02 189#define ICOM_ACFG_PARITY_ODD 0x01 190#define ICOM_ACFG_8BPC 0x00 191#define ICOM_ACFG_7BPC 0x04 192#define ICOM_ACFG_6BPC 0x08 193#define ICOM_ACFG_5BPC 0x0C 194#define ICOM_ACFG_1STOP_BIT 0x00 195#define ICOM_ACFG_2STOP_BIT 0x10 196#define ICOM_DTR 0x80 197#define ICOM_RTS 0x40 198#define ICOM_RI 0x08 199#define ICOM_DSR 0x80 200#define ICOM_DCD 0x20 201#define ICOM_CTS 0x40 202 203#define NUM_XBUFFS 1 204#define NUM_RBUFFS 2 205#define RCV_BUFF_SZ 0x0200 206#define XMIT_BUFF_SZ 0x1000 207struct statusArea { 208 /**********************************************/ 209 /* Transmit Status Area */ 210 /**********************************************/ 211 struct xmit_status_area{ 212 __le32 leNext; /* Next entry in Little Endian on Adapter */ 213 __le32 leNextASD; 214 __le32 leBuffer; /* Buffer for entry in LE for Adapter */ 215 __le16 leLengthASD; 216 __le16 leOffsetASD; 217 __le16 leLength; /* Length of data in segment */ 218 __le16 flags; 219#define SA_FLAGS_DONE 0x0080 /* Done with Segment */ 220#define SA_FLAGS_CONTINUED 0x8000 /* More Segments */ 221#define SA_FLAGS_IDLE 0x4000 /* Mark IDLE after frm */ 222#define SA_FLAGS_READY_TO_XMIT 0x0800 223#define SA_FLAGS_STAT_MASK 0x007F 224 } xmit[NUM_XBUFFS]; 225 226 /**********************************************/ 227 /* Receive Status Area */ 228 /**********************************************/ 229 struct { 230 __le32 leNext; /* Next entry in Little Endian on Adapter */ 231 __le32 leNextASD; 232 __le32 leBuffer; /* Buffer for entry in LE for Adapter */ 233 __le16 WorkingLength; /* size of segment */ 234 __le16 reserv01; 235 __le16 leLength; /* Length of data in segment */ 236 __le16 flags; 237#define SA_FL_RCV_DONE 0x0010 /* Data ready */ 238#define SA_FLAGS_OVERRUN 0x0040 239#define SA_FLAGS_PARITY_ERROR 0x0080 240#define SA_FLAGS_FRAME_ERROR 0x0001 241#define SA_FLAGS_FRAME_TRUNC 0x0002 242#define SA_FLAGS_BREAK_DET 0x0004 /* set conditionally by device driver, not hardware */ 243#define SA_FLAGS_RCV_MASK 0xFFE6 244 } rcv[NUM_RBUFFS]; 245}; 246 247struct icom_adapter; 248 249 250#define ICOM_MAJOR 243 251#define ICOM_MINOR_START 0 252 253struct icom_port { 254 struct uart_port uart_port; 255 unsigned char cable_id; 256 unsigned char read_status_mask; 257 unsigned char ignore_status_mask; 258 void __iomem * int_reg; 259 struct icom_regs __iomem *global_reg; 260 struct func_dram __iomem *dram; 261 int port; 262 struct statusArea *statStg; 263 dma_addr_t statStg_pci; 264 __le32 *xmitRestart; 265 dma_addr_t xmitRestart_pci; 266 unsigned char *xmit_buf; 267 dma_addr_t xmit_buf_pci; 268 unsigned char *recv_buf; 269 dma_addr_t recv_buf_pci; 270 int next_rcv; 271 int status; 272#define ICOM_PORT_ACTIVE 1 /* Port exists. */ 273#define ICOM_PORT_OFF 0 /* Port does not exist. */ 274 struct icom_adapter *adapter; 275}; 276 277struct icom_adapter { 278 void __iomem * base_addr; 279 unsigned long base_addr_pci; 280 struct pci_dev *pci_dev; 281 struct icom_port port_info[4]; 282 int index; 283 int version; 284#define ADAPTER_V1 0x0001 285#define ADAPTER_V2 0x0002 286 u32 subsystem_id; 287#define FOUR_PORT_MODEL 0x0252 288#define V2_TWO_PORTS_RVX 0x021A 289#define V2_ONE_PORT_RVX_ONE_PORT_IMBED_MDM 0x0251 290 int numb_ports; 291 struct list_head icom_adapter_entry; 292 struct kref kref; 293}; 294 295/* prototype */ 296extern void iCom_sercons_init(void); 297 298struct lookup_proc_table { 299 u32 __iomem *global_control_reg; 300 unsigned long processor_id; 301}; 302 303struct lookup_int_table { 304 u32 __iomem *global_int_mask; 305 unsigned long processor_id; 306}; 307 308static inline struct icom_port *to_icom_port(struct uart_port *port) 309{ 310 return container_of(port, struct icom_port, uart_port); 311} 312 313static const struct pci_device_id icom_pci_table[] = { 314 { 315 .vendor = PCI_VENDOR_ID_IBM, 316 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1, 317 .subvendor = PCI_ANY_ID, 318 .subdevice = PCI_ANY_ID, 319 .driver_data = ADAPTER_V1, 320 }, 321 { 322 .vendor = PCI_VENDOR_ID_IBM, 323 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 324 .subvendor = PCI_VENDOR_ID_IBM, 325 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX, 326 .driver_data = ADAPTER_V2, 327 }, 328 { 329 .vendor = PCI_VENDOR_ID_IBM, 330 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 331 .subvendor = PCI_VENDOR_ID_IBM, 332 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM, 333 .driver_data = ADAPTER_V2, 334 }, 335 { 336 .vendor = PCI_VENDOR_ID_IBM, 337 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 338 .subvendor = PCI_VENDOR_ID_IBM, 339 .subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL, 340 .driver_data = ADAPTER_V2, 341 }, 342 { 343 .vendor = PCI_VENDOR_ID_IBM, 344 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 345 .subvendor = PCI_VENDOR_ID_IBM, 346 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM_PCIE, 347 .driver_data = ADAPTER_V2, 348 }, 349 {} 350}; 351 352static struct lookup_proc_table start_proc[4] = { 353 {NULL, ICOM_CONTROL_START_A}, 354 {NULL, ICOM_CONTROL_START_B}, 355 {NULL, ICOM_CONTROL_START_C}, 356 {NULL, ICOM_CONTROL_START_D} 357}; 358 359 360static struct lookup_proc_table stop_proc[4] = { 361 {NULL, ICOM_CONTROL_STOP_A}, 362 {NULL, ICOM_CONTROL_STOP_B}, 363 {NULL, ICOM_CONTROL_STOP_C}, 364 {NULL, ICOM_CONTROL_STOP_D} 365}; 366 367static struct lookup_int_table int_mask_tbl[4] = { 368 {NULL, ICOM_INT_MASK_PRC_A}, 369 {NULL, ICOM_INT_MASK_PRC_B}, 370 {NULL, ICOM_INT_MASK_PRC_C}, 371 {NULL, ICOM_INT_MASK_PRC_D}, 372}; 373 374 375MODULE_DEVICE_TABLE(pci, icom_pci_table); 376 377static LIST_HEAD(icom_adapter_head); 378 379/* spinlock for adapter initialization and changing adapter operations */ 380static DEFINE_SPINLOCK(icom_lock); 381 382#ifdef ICOM_TRACE 383static inline void trace(struct icom_port *icom_port, char *trace_pt, 384 unsigned long trace_data) 385{ 386 dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n", 387 icom_port->port, trace_pt, trace_data); 388} 389#else 390static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {}; 391#endif 392static void icom_kref_release(struct kref *kref); 393 394static void free_port_memory(struct icom_port *icom_port) 395{ 396 struct pci_dev *dev = icom_port->adapter->pci_dev; 397 398 trace(icom_port, "RET_PORT_MEM", 0); 399 if (icom_port->recv_buf) { 400 dma_free_coherent(&dev->dev, 4096, icom_port->recv_buf, 401 icom_port->recv_buf_pci); 402 icom_port->recv_buf = NULL; 403 } 404 if (icom_port->xmit_buf) { 405 dma_free_coherent(&dev->dev, 4096, icom_port->xmit_buf, 406 icom_port->xmit_buf_pci); 407 icom_port->xmit_buf = NULL; 408 } 409 if (icom_port->statStg) { 410 dma_free_coherent(&dev->dev, 4096, icom_port->statStg, 411 icom_port->statStg_pci); 412 icom_port->statStg = NULL; 413 } 414 415 if (icom_port->xmitRestart) { 416 dma_free_coherent(&dev->dev, 4096, icom_port->xmitRestart, 417 icom_port->xmitRestart_pci); 418 icom_port->xmitRestart = NULL; 419 } 420} 421 422static int get_port_memory(struct icom_port *icom_port) 423{ 424 int index; 425 unsigned long stgAddr; 426 unsigned long startStgAddr; 427 unsigned long offset; 428 struct pci_dev *dev = icom_port->adapter->pci_dev; 429 430 icom_port->xmit_buf = 431 dma_alloc_coherent(&dev->dev, 4096, &icom_port->xmit_buf_pci, 432 GFP_KERNEL); 433 if (!icom_port->xmit_buf) { 434 dev_err(&dev->dev, "Can not allocate Transmit buffer\n"); 435 return -ENOMEM; 436 } 437 438 trace(icom_port, "GET_PORT_MEM", 439 (unsigned long) icom_port->xmit_buf); 440 441 icom_port->recv_buf = 442 dma_alloc_coherent(&dev->dev, 4096, &icom_port->recv_buf_pci, 443 GFP_KERNEL); 444 if (!icom_port->recv_buf) { 445 dev_err(&dev->dev, "Can not allocate Receive buffer\n"); 446 free_port_memory(icom_port); 447 return -ENOMEM; 448 } 449 trace(icom_port, "GET_PORT_MEM", 450 (unsigned long) icom_port->recv_buf); 451 452 icom_port->statStg = 453 dma_alloc_coherent(&dev->dev, 4096, &icom_port->statStg_pci, 454 GFP_KERNEL); 455 if (!icom_port->statStg) { 456 dev_err(&dev->dev, "Can not allocate Status buffer\n"); 457 free_port_memory(icom_port); 458 return -ENOMEM; 459 } 460 trace(icom_port, "GET_PORT_MEM", 461 (unsigned long) icom_port->statStg); 462 463 icom_port->xmitRestart = 464 dma_alloc_coherent(&dev->dev, 4096, &icom_port->xmitRestart_pci, 465 GFP_KERNEL); 466 if (!icom_port->xmitRestart) { 467 dev_err(&dev->dev, 468 "Can not allocate xmit Restart buffer\n"); 469 free_port_memory(icom_port); 470 return -ENOMEM; 471 } 472 473 /* FODs: Frame Out Descriptor Queue, this is a FIFO queue that 474 indicates that frames are to be transmitted 475 */ 476 477 stgAddr = (unsigned long) icom_port->statStg; 478 for (index = 0; index < NUM_XBUFFS; index++) { 479 trace(icom_port, "FOD_ADDR", stgAddr); 480 stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]); 481 if (index < (NUM_XBUFFS - 1)) { 482 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); 483 icom_port->statStg->xmit[index].leLengthASD = 484 cpu_to_le16(XMIT_BUFF_SZ); 485 trace(icom_port, "FOD_ADDR", stgAddr); 486 trace(icom_port, "FOD_XBUFF", 487 (unsigned long) icom_port->xmit_buf); 488 icom_port->statStg->xmit[index].leBuffer = 489 cpu_to_le32(icom_port->xmit_buf_pci); 490 } else if (index == (NUM_XBUFFS - 1)) { 491 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); 492 icom_port->statStg->xmit[index].leLengthASD = 493 cpu_to_le16(XMIT_BUFF_SZ); 494 trace(icom_port, "FOD_XBUFF", 495 (unsigned long) icom_port->xmit_buf); 496 icom_port->statStg->xmit[index].leBuffer = 497 cpu_to_le32(icom_port->xmit_buf_pci); 498 } else { 499 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); 500 } 501 } 502 /* FIDs */ 503 startStgAddr = stgAddr; 504 505 /* fill in every entry, even if no buffer */ 506 for (index = 0; index < NUM_RBUFFS; index++) { 507 trace(icom_port, "FID_ADDR", stgAddr); 508 stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]); 509 icom_port->statStg->rcv[index].leLength = 0; 510 icom_port->statStg->rcv[index].WorkingLength = 511 cpu_to_le16(RCV_BUFF_SZ); 512 if (index < (NUM_RBUFFS - 1) ) { 513 offset = stgAddr - (unsigned long) icom_port->statStg; 514 icom_port->statStg->rcv[index].leNext = 515 cpu_to_le32(icom_port-> statStg_pci + offset); 516 trace(icom_port, "FID_RBUFF", 517 (unsigned long) icom_port->recv_buf); 518 icom_port->statStg->rcv[index].leBuffer = 519 cpu_to_le32(icom_port->recv_buf_pci); 520 } else if (index == (NUM_RBUFFS -1) ) { 521 offset = startStgAddr - (unsigned long) icom_port->statStg; 522 icom_port->statStg->rcv[index].leNext = 523 cpu_to_le32(icom_port-> statStg_pci + offset); 524 trace(icom_port, "FID_RBUFF", 525 (unsigned long) icom_port->recv_buf + 2048); 526 icom_port->statStg->rcv[index].leBuffer = 527 cpu_to_le32(icom_port->recv_buf_pci + 2048); 528 } else { 529 icom_port->statStg->rcv[index].leNext = 0; 530 icom_port->statStg->rcv[index].leBuffer = 0; 531 } 532 } 533 534 return 0; 535} 536 537static void stop_processor(struct icom_port *icom_port) 538{ 539 unsigned long temp; 540 unsigned long flags; 541 int port; 542 543 spin_lock_irqsave(&icom_lock, flags); 544 545 port = icom_port->port; 546 if (port >= ARRAY_SIZE(stop_proc)) { 547 dev_err(&icom_port->adapter->pci_dev->dev, 548 "Invalid port assignment\n"); 549 goto unlock; 550 } 551 552 if (port == 0 || port == 1) 553 stop_proc[port].global_control_reg = &icom_port->global_reg->control; 554 else 555 stop_proc[port].global_control_reg = &icom_port->global_reg->control_2; 556 557 temp = readl(stop_proc[port].global_control_reg); 558 temp = (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id; 559 writel(temp, stop_proc[port].global_control_reg); 560 561 /* write flush */ 562 readl(stop_proc[port].global_control_reg); 563 564unlock: 565 spin_unlock_irqrestore(&icom_lock, flags); 566} 567 568static void start_processor(struct icom_port *icom_port) 569{ 570 unsigned long temp; 571 unsigned long flags; 572 int port; 573 574 spin_lock_irqsave(&icom_lock, flags); 575 576 port = icom_port->port; 577 if (port >= ARRAY_SIZE(start_proc)) { 578 dev_err(&icom_port->adapter->pci_dev->dev, 579 "Invalid port assignment\n"); 580 goto unlock; 581 } 582 583 if (port == 0 || port == 1) 584 start_proc[port].global_control_reg = &icom_port->global_reg->control; 585 else 586 start_proc[port].global_control_reg = &icom_port->global_reg->control_2; 587 588 temp = readl(start_proc[port].global_control_reg); 589 temp = (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id; 590 writel(temp, start_proc[port].global_control_reg); 591 592 /* write flush */ 593 readl(start_proc[port].global_control_reg); 594 595unlock: 596 spin_unlock_irqrestore(&icom_lock, flags); 597} 598 599static void load_code(struct icom_port *icom_port) 600{ 601 const struct firmware *fw; 602 char __iomem *iram_ptr; 603 int index; 604 int status = 0; 605 void __iomem *dram_ptr = icom_port->dram; 606 dma_addr_t temp_pci; 607 unsigned char *new_page = NULL; 608 unsigned char cable_id = NO_CABLE; 609 struct pci_dev *dev = icom_port->adapter->pci_dev; 610 611 /* Clear out any pending interrupts */ 612 writew(0x3FFF, icom_port->int_reg); 613 614 trace(icom_port, "CLEAR_INTERRUPTS", 0); 615 616 /* Stop processor */ 617 stop_processor(icom_port); 618 619 /* Zero out DRAM */ 620 memset_io(dram_ptr, 0, 512); 621 622 /* Load Call Setup into Adapter */ 623 if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) { 624 dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n"); 625 status = -1; 626 goto load_code_exit; 627 } 628 629 if (fw->size > ICOM_DCE_IRAM_OFFSET) { 630 dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n"); 631 release_firmware(fw); 632 status = -1; 633 goto load_code_exit; 634 } 635 636 iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET; 637 for (index = 0; index < fw->size; index++) 638 writeb(fw->data[index], &iram_ptr[index]); 639 640 release_firmware(fw); 641 642 /* Load Resident DCE portion of Adapter */ 643 if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) { 644 dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n"); 645 status = -1; 646 goto load_code_exit; 647 } 648 649 if (fw->size > ICOM_IRAM_SIZE) { 650 dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n"); 651 release_firmware(fw); 652 status = -1; 653 goto load_code_exit; 654 } 655 656 iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET; 657 for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++) 658 writeb(fw->data[index], &iram_ptr[index]); 659 660 release_firmware(fw); 661 662 /* Set Hardware level */ 663 if (icom_port->adapter->version == ADAPTER_V2) 664 writeb(V2_HARDWARE, &(icom_port->dram->misc_flags)); 665 666 /* Start the processor in Adapter */ 667 start_processor(icom_port); 668 669 writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL), 670 &(icom_port->dram->HDLCConfigReg)); 671 writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */ 672 writeb(0x00, &(icom_port->dram->CmdReg)); 673 writeb(0x10, &(icom_port->dram->async_config3)); 674 writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC | 675 ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2)); 676 677 /*Set up data in icom DRAM to indicate where personality 678 *code is located and its length. 679 */ 680 new_page = dma_alloc_coherent(&dev->dev, 4096, &temp_pci, GFP_KERNEL); 681 682 if (!new_page) { 683 dev_err(&dev->dev, "Can not allocate DMA buffer\n"); 684 status = -1; 685 goto load_code_exit; 686 } 687 688 if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) { 689 dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n"); 690 status = -1; 691 goto load_code_exit; 692 } 693 694 if (fw->size > ICOM_DCE_IRAM_OFFSET) { 695 dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n"); 696 release_firmware(fw); 697 status = -1; 698 goto load_code_exit; 699 } 700 701 for (index = 0; index < fw->size; index++) 702 new_page[index] = fw->data[index]; 703 704 writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length); 705 writel(temp_pci, &icom_port->dram->mac_load_addr); 706 707 release_firmware(fw); 708 709 /*Setting the syncReg to 0x80 causes adapter to start downloading 710 the personality code into adapter instruction RAM. 711 Once code is loaded, it will begin executing and, based on 712 information provided above, will start DMAing data from 713 shared memory to adapter DRAM. 714 */ 715 /* the wait loop below verifies this write operation has been done 716 and processed 717 */ 718 writeb(START_DOWNLOAD, &icom_port->dram->sync); 719 720 /* Wait max 1 Sec for data download and processor to start */ 721 for (index = 0; index < 10; index++) { 722 msleep(100); 723 if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE) 724 break; 725 } 726 727 if (index == 10) 728 status = -1; 729 730 /* 731 * check Cable ID 732 */ 733 cable_id = readb(&icom_port->dram->cable_id); 734 735 if (cable_id & ICOM_CABLE_ID_VALID) { 736 /* Get cable ID into the lower 4 bits (standard form) */ 737 cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4; 738 icom_port->cable_id = cable_id; 739 } else { 740 dev_err(&dev->dev,"Invalid or no cable attached\n"); 741 icom_port->cable_id = NO_CABLE; 742 } 743 744 load_code_exit: 745 746 if (status != 0) { 747 /* Clear out any pending interrupts */ 748 writew(0x3FFF, icom_port->int_reg); 749 750 /* Turn off port */ 751 writeb(ICOM_DISABLE, &(icom_port->dram->disable)); 752 753 /* Stop processor */ 754 stop_processor(icom_port); 755 756 dev_err(&icom_port->adapter->pci_dev->dev,"Port not operational\n"); 757 } 758 759 if (new_page != NULL) 760 dma_free_coherent(&dev->dev, 4096, new_page, temp_pci); 761} 762 763static int startup(struct icom_port *icom_port) 764{ 765 unsigned long temp; 766 unsigned char cable_id, raw_cable_id; 767 unsigned long flags; 768 int port; 769 770 trace(icom_port, "STARTUP", 0); 771 772 if (!icom_port->dram) { 773 /* should NEVER be NULL */ 774 dev_err(&icom_port->adapter->pci_dev->dev, 775 "Unusable Port, port configuration missing\n"); 776 return -ENODEV; 777 } 778 779 /* 780 * check Cable ID 781 */ 782 raw_cable_id = readb(&icom_port->dram->cable_id); 783 trace(icom_port, "CABLE_ID", raw_cable_id); 784 785 /* Get cable ID into the lower 4 bits (standard form) */ 786 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4; 787 788 /* Check for valid Cable ID */ 789 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) || 790 (cable_id != icom_port->cable_id)) { 791 792 /* reload adapter code, pick up any potential changes in cable id */ 793 load_code(icom_port); 794 795 /* still no sign of cable, error out */ 796 raw_cable_id = readb(&icom_port->dram->cable_id); 797 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4; 798 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) || 799 (icom_port->cable_id == NO_CABLE)) 800 return -EIO; 801 } 802 803 /* 804 * Finally, clear and enable interrupts 805 */ 806 spin_lock_irqsave(&icom_lock, flags); 807 port = icom_port->port; 808 if (port >= ARRAY_SIZE(int_mask_tbl)) { 809 dev_err(&icom_port->adapter->pci_dev->dev, 810 "Invalid port assignment\n"); 811 goto unlock; 812 } 813 814 if (port == 0 || port == 1) 815 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask; 816 else 817 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2; 818 819 if (port == 0 || port == 2) 820 writew(0x00FF, icom_port->int_reg); 821 else 822 writew(0x3F00, icom_port->int_reg); 823 824 temp = readl(int_mask_tbl[port].global_int_mask); 825 writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask); 826 827 /* write flush */ 828 readl(int_mask_tbl[port].global_int_mask); 829 830unlock: 831 spin_unlock_irqrestore(&icom_lock, flags); 832 return 0; 833} 834 835static void shutdown(struct icom_port *icom_port) 836{ 837 unsigned long temp; 838 unsigned char cmdReg; 839 unsigned long flags; 840 int port; 841 842 spin_lock_irqsave(&icom_lock, flags); 843 trace(icom_port, "SHUTDOWN", 0); 844 845 /* 846 * disable all interrupts 847 */ 848 port = icom_port->port; 849 if (port >= ARRAY_SIZE(int_mask_tbl)) { 850 dev_err(&icom_port->adapter->pci_dev->dev, 851 "Invalid port assignment\n"); 852 goto unlock; 853 } 854 if (port == 0 || port == 1) 855 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask; 856 else 857 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2; 858 859 temp = readl(int_mask_tbl[port].global_int_mask); 860 writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask); 861 862 /* write flush */ 863 readl(int_mask_tbl[port].global_int_mask); 864 865unlock: 866 spin_unlock_irqrestore(&icom_lock, flags); 867 868 /* 869 * disable break condition 870 */ 871 cmdReg = readb(&icom_port->dram->CmdReg); 872 if (cmdReg & CMD_SND_BREAK) { 873 writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg); 874 } 875} 876 877static int icom_write(struct uart_port *port) 878{ 879 struct icom_port *icom_port = to_icom_port(port); 880 unsigned long data_count; 881 unsigned char cmdReg; 882 unsigned long offset; 883 int temp_tail = port->state->xmit.tail; 884 885 trace(icom_port, "WRITE", 0); 886 887 if (le16_to_cpu(icom_port->statStg->xmit[0].flags) & 888 SA_FLAGS_READY_TO_XMIT) { 889 trace(icom_port, "WRITE_FULL", 0); 890 return 0; 891 } 892 893 data_count = 0; 894 while ((port->state->xmit.head != temp_tail) && 895 (data_count <= XMIT_BUFF_SZ)) { 896 897 icom_port->xmit_buf[data_count++] = 898 port->state->xmit.buf[temp_tail]; 899 900 temp_tail++; 901 temp_tail &= (UART_XMIT_SIZE - 1); 902 } 903 904 if (data_count) { 905 icom_port->statStg->xmit[0].flags = 906 cpu_to_le16(SA_FLAGS_READY_TO_XMIT); 907 icom_port->statStg->xmit[0].leLength = 908 cpu_to_le16(data_count); 909 offset = 910 (unsigned long) &icom_port->statStg->xmit[0] - 911 (unsigned long) icom_port->statStg; 912 *icom_port->xmitRestart = 913 cpu_to_le32(icom_port->statStg_pci + offset); 914 cmdReg = readb(&icom_port->dram->CmdReg); 915 writeb(cmdReg | CMD_XMIT_RCV_ENABLE, 916 &icom_port->dram->CmdReg); 917 writeb(START_XMIT, &icom_port->dram->StartXmitCmd); 918 trace(icom_port, "WRITE_START", data_count); 919 /* write flush */ 920 readb(&icom_port->dram->StartXmitCmd); 921 } 922 923 return data_count; 924} 925 926static inline void check_modem_status(struct icom_port *icom_port) 927{ 928 static char old_status = 0; 929 char delta_status; 930 unsigned char status; 931 932 uart_port_lock(&icom_port->uart_port); 933 934 /*modem input register */ 935 status = readb(&icom_port->dram->isr); 936 trace(icom_port, "CHECK_MODEM", status); 937 delta_status = status ^ old_status; 938 if (delta_status) { 939 if (delta_status & ICOM_RI) 940 icom_port->uart_port.icount.rng++; 941 if (delta_status & ICOM_DSR) 942 icom_port->uart_port.icount.dsr++; 943 if (delta_status & ICOM_DCD) 944 uart_handle_dcd_change(&icom_port->uart_port, 945 delta_status & ICOM_DCD); 946 if (delta_status & ICOM_CTS) 947 uart_handle_cts_change(&icom_port->uart_port, 948 delta_status & ICOM_CTS); 949 950 wake_up_interruptible(&icom_port->uart_port.state-> 951 port.delta_msr_wait); 952 old_status = status; 953 } 954 uart_port_unlock(&icom_port->uart_port); 955} 956 957static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port) 958{ 959 u16 count, i; 960 961 if (port_int_reg & (INT_XMIT_COMPLETED)) { 962 trace(icom_port, "XMIT_COMPLETE", 0); 963 964 /* clear buffer in use bit */ 965 icom_port->statStg->xmit[0].flags &= 966 cpu_to_le16(~SA_FLAGS_READY_TO_XMIT); 967 968 count = le16_to_cpu(icom_port->statStg->xmit[0].leLength); 969 icom_port->uart_port.icount.tx += count; 970 971 for (i=0; i<count && 972 !uart_circ_empty(&icom_port->uart_port.state->xmit); i++) { 973 974 icom_port->uart_port.state->xmit.tail++; 975 icom_port->uart_port.state->xmit.tail &= 976 (UART_XMIT_SIZE - 1); 977 } 978 979 if (!icom_write(&icom_port->uart_port)) 980 /* activate write queue */ 981 uart_write_wakeup(&icom_port->uart_port); 982 } else 983 trace(icom_port, "XMIT_DISABLED", 0); 984} 985 986static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port) 987{ 988 short int count, rcv_buff; 989 struct tty_port *port = &icom_port->uart_port.state->port; 990 u16 status; 991 struct uart_icount *icount; 992 unsigned long offset; 993 unsigned char flag; 994 995 trace(icom_port, "RCV_COMPLETE", 0); 996 rcv_buff = icom_port->next_rcv; 997 998 status = le16_to_cpu(icom_port->statStg->rcv[rcv_buff].flags); 999 while (status & SA_FL_RCV_DONE) { 1000 int first = -1; 1001 1002 trace(icom_port, "FID_STATUS", status); 1003 count = le16_to_cpu(icom_port->statStg->rcv[rcv_buff].leLength); 1004 1005 trace(icom_port, "RCV_COUNT", count); 1006 1007 trace(icom_port, "REAL_COUNT", count); 1008 1009 offset = le32_to_cpu(icom_port->statStg->rcv[rcv_buff].leBuffer) - 1010 icom_port->recv_buf_pci; 1011 1012 /* Block copy all but the last byte as this may have status */ 1013 if (count > 0) { 1014 first = icom_port->recv_buf[offset]; 1015 tty_insert_flip_string(port, icom_port->recv_buf + offset, count - 1); 1016 } 1017 1018 icount = &icom_port->uart_port.icount; 1019 icount->rx += count; 1020 1021 /* Break detect logic */ 1022 if ((status & SA_FLAGS_FRAME_ERROR) 1023 && first == 0) { 1024 status &= ~SA_FLAGS_FRAME_ERROR; 1025 status |= SA_FLAGS_BREAK_DET; 1026 trace(icom_port, "BREAK_DET", 0); 1027 } 1028 1029 flag = TTY_NORMAL; 1030 1031 if (status & 1032 (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR | 1033 SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) { 1034 1035 if (status & SA_FLAGS_BREAK_DET) 1036 icount->brk++; 1037 if (status & SA_FLAGS_PARITY_ERROR) 1038 icount->parity++; 1039 if (status & SA_FLAGS_FRAME_ERROR) 1040 icount->frame++; 1041 if (status & SA_FLAGS_OVERRUN) 1042 icount->overrun++; 1043 1044 /* 1045 * Now check to see if character should be 1046 * ignored, and mask off conditions which 1047 * should be ignored. 1048 */ 1049 if (status & icom_port->ignore_status_mask) { 1050 trace(icom_port, "IGNORE_CHAR", 0); 1051 goto ignore_char; 1052 } 1053 1054 status &= icom_port->read_status_mask; 1055 1056 if (status & SA_FLAGS_BREAK_DET) { 1057 flag = TTY_BREAK; 1058 } else if (status & SA_FLAGS_PARITY_ERROR) { 1059 trace(icom_port, "PARITY_ERROR", 0); 1060 flag = TTY_PARITY; 1061 } else if (status & SA_FLAGS_FRAME_ERROR) 1062 flag = TTY_FRAME; 1063 1064 } 1065 1066 tty_insert_flip_char(port, *(icom_port->recv_buf + offset + count - 1), flag); 1067 1068 if (status & SA_FLAGS_OVERRUN) 1069 /* 1070 * Overrun is special, since it's 1071 * reported immediately, and doesn't 1072 * affect the current character 1073 */ 1074 tty_insert_flip_char(port, 0, TTY_OVERRUN); 1075ignore_char: 1076 icom_port->statStg->rcv[rcv_buff].flags = 0; 1077 icom_port->statStg->rcv[rcv_buff].leLength = 0; 1078 icom_port->statStg->rcv[rcv_buff].WorkingLength = 1079 cpu_to_le16(RCV_BUFF_SZ); 1080 1081 rcv_buff++; 1082 if (rcv_buff == NUM_RBUFFS) 1083 rcv_buff = 0; 1084 1085 status = le16_to_cpu(icom_port->statStg->rcv[rcv_buff].flags); 1086 } 1087 icom_port->next_rcv = rcv_buff; 1088 1089 tty_flip_buffer_push(port); 1090} 1091 1092static void process_interrupt(u16 port_int_reg, 1093 struct icom_port *icom_port) 1094{ 1095 1096 uart_port_lock(&icom_port->uart_port); 1097 trace(icom_port, "INTERRUPT", port_int_reg); 1098 1099 if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED)) 1100 xmit_interrupt(port_int_reg, icom_port); 1101 1102 if (port_int_reg & INT_RCV_COMPLETED) 1103 recv_interrupt(port_int_reg, icom_port); 1104 1105 uart_port_unlock(&icom_port->uart_port); 1106} 1107 1108static irqreturn_t icom_interrupt(int irq, void *dev_id) 1109{ 1110 void __iomem * int_reg; 1111 u32 adapter_interrupts; 1112 u16 port_int_reg; 1113 struct icom_adapter *icom_adapter; 1114 struct icom_port *icom_port; 1115 1116 /* find icom_port for this interrupt */ 1117 icom_adapter = (struct icom_adapter *) dev_id; 1118 1119 if (icom_adapter->version == ADAPTER_V2) { 1120 int_reg = icom_adapter->base_addr + 0x8024; 1121 1122 adapter_interrupts = readl(int_reg); 1123 1124 if (adapter_interrupts & 0x00003FFF) { 1125 /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */ 1126 icom_port = &icom_adapter->port_info[2]; 1127 port_int_reg = (u16) adapter_interrupts; 1128 process_interrupt(port_int_reg, icom_port); 1129 check_modem_status(icom_port); 1130 } 1131 if (adapter_interrupts & 0x3FFF0000) { 1132 /* port 3 interrupt */ 1133 icom_port = &icom_adapter->port_info[3]; 1134 if (icom_port->status == ICOM_PORT_ACTIVE) { 1135 port_int_reg = 1136 (u16) (adapter_interrupts >> 16); 1137 process_interrupt(port_int_reg, icom_port); 1138 check_modem_status(icom_port); 1139 } 1140 } 1141 1142 /* Clear out any pending interrupts */ 1143 writel(adapter_interrupts, int_reg); 1144 1145 int_reg = icom_adapter->base_addr + 0x8004; 1146 } else { 1147 int_reg = icom_adapter->base_addr + 0x4004; 1148 } 1149 1150 adapter_interrupts = readl(int_reg); 1151 1152 if (adapter_interrupts & 0x00003FFF) { 1153 /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */ 1154 icom_port = &icom_adapter->port_info[0]; 1155 port_int_reg = (u16) adapter_interrupts; 1156 process_interrupt(port_int_reg, icom_port); 1157 check_modem_status(icom_port); 1158 } 1159 if (adapter_interrupts & 0x3FFF0000) { 1160 /* port 1 interrupt */ 1161 icom_port = &icom_adapter->port_info[1]; 1162 if (icom_port->status == ICOM_PORT_ACTIVE) { 1163 port_int_reg = (u16) (adapter_interrupts >> 16); 1164 process_interrupt(port_int_reg, icom_port); 1165 check_modem_status(icom_port); 1166 } 1167 } 1168 1169 /* Clear out any pending interrupts */ 1170 writel(adapter_interrupts, int_reg); 1171 1172 /* flush the write */ 1173 adapter_interrupts = readl(int_reg); 1174 1175 return IRQ_HANDLED; 1176} 1177 1178/* 1179 * ------------------------------------------------------------------ 1180 * Begin serial-core API 1181 * ------------------------------------------------------------------ 1182 */ 1183static unsigned int icom_tx_empty(struct uart_port *port) 1184{ 1185 struct icom_port *icom_port = to_icom_port(port); 1186 int ret; 1187 unsigned long flags; 1188 1189 uart_port_lock_irqsave(port, &flags); 1190 if (le16_to_cpu(icom_port->statStg->xmit[0].flags) & 1191 SA_FLAGS_READY_TO_XMIT) 1192 ret = TIOCSER_TEMT; 1193 else 1194 ret = 0; 1195 1196 uart_port_unlock_irqrestore(port, flags); 1197 return ret; 1198} 1199 1200static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl) 1201{ 1202 struct icom_port *icom_port = to_icom_port(port); 1203 unsigned char local_osr; 1204 1205 trace(icom_port, "SET_MODEM", 0); 1206 local_osr = readb(&icom_port->dram->osr); 1207 1208 if (mctrl & TIOCM_RTS) { 1209 trace(icom_port, "RAISE_RTS", 0); 1210 local_osr |= ICOM_RTS; 1211 } else { 1212 trace(icom_port, "LOWER_RTS", 0); 1213 local_osr &= ~ICOM_RTS; 1214 } 1215 1216 if (mctrl & TIOCM_DTR) { 1217 trace(icom_port, "RAISE_DTR", 0); 1218 local_osr |= ICOM_DTR; 1219 } else { 1220 trace(icom_port, "LOWER_DTR", 0); 1221 local_osr &= ~ICOM_DTR; 1222 } 1223 1224 writeb(local_osr, &icom_port->dram->osr); 1225} 1226 1227static unsigned int icom_get_mctrl(struct uart_port *port) 1228{ 1229 struct icom_port *icom_port = to_icom_port(port); 1230 unsigned char status; 1231 unsigned int result; 1232 1233 trace(icom_port, "GET_MODEM", 0); 1234 1235 status = readb(&icom_port->dram->isr); 1236 1237 result = ((status & ICOM_DCD) ? TIOCM_CAR : 0) 1238 | ((status & ICOM_RI) ? TIOCM_RNG : 0) 1239 | ((status & ICOM_DSR) ? TIOCM_DSR : 0) 1240 | ((status & ICOM_CTS) ? TIOCM_CTS : 0); 1241 return result; 1242} 1243 1244static void icom_stop_tx(struct uart_port *port) 1245{ 1246 struct icom_port *icom_port = to_icom_port(port); 1247 unsigned char cmdReg; 1248 1249 trace(icom_port, "STOP", 0); 1250 cmdReg = readb(&icom_port->dram->CmdReg); 1251 writeb(cmdReg | CMD_HOLD_XMIT, &icom_port->dram->CmdReg); 1252} 1253 1254static void icom_start_tx(struct uart_port *port) 1255{ 1256 struct icom_port *icom_port = to_icom_port(port); 1257 unsigned char cmdReg; 1258 1259 trace(icom_port, "START", 0); 1260 cmdReg = readb(&icom_port->dram->CmdReg); 1261 if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT) 1262 writeb(cmdReg & ~CMD_HOLD_XMIT, 1263 &icom_port->dram->CmdReg); 1264 1265 icom_write(port); 1266} 1267 1268static void icom_send_xchar(struct uart_port *port, char ch) 1269{ 1270 struct icom_port *icom_port = to_icom_port(port); 1271 unsigned char xdata; 1272 int index; 1273 unsigned long flags; 1274 1275 trace(icom_port, "SEND_XCHAR", ch); 1276 1277 /* wait .1 sec to send char */ 1278 for (index = 0; index < 10; index++) { 1279 uart_port_lock_irqsave(port, &flags); 1280 xdata = readb(&icom_port->dram->xchar); 1281 if (xdata == 0x00) { 1282 trace(icom_port, "QUICK_WRITE", 0); 1283 writeb(ch, &icom_port->dram->xchar); 1284 1285 /* flush write operation */ 1286 xdata = readb(&icom_port->dram->xchar); 1287 uart_port_unlock_irqrestore(port, flags); 1288 break; 1289 } 1290 uart_port_unlock_irqrestore(port, flags); 1291 msleep(10); 1292 } 1293} 1294 1295static void icom_stop_rx(struct uart_port *port) 1296{ 1297 struct icom_port *icom_port = to_icom_port(port); 1298 unsigned char cmdReg; 1299 1300 cmdReg = readb(&icom_port->dram->CmdReg); 1301 writeb(cmdReg & ~CMD_RCV_ENABLE, &icom_port->dram->CmdReg); 1302} 1303 1304static void icom_break(struct uart_port *port, int break_state) 1305{ 1306 struct icom_port *icom_port = to_icom_port(port); 1307 unsigned char cmdReg; 1308 unsigned long flags; 1309 1310 uart_port_lock_irqsave(port, &flags); 1311 trace(icom_port, "BREAK", 0); 1312 cmdReg = readb(&icom_port->dram->CmdReg); 1313 if (break_state == -1) { 1314 writeb(cmdReg | CMD_SND_BREAK, &icom_port->dram->CmdReg); 1315 } else { 1316 writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg); 1317 } 1318 uart_port_unlock_irqrestore(port, flags); 1319} 1320 1321static int icom_open(struct uart_port *port) 1322{ 1323 struct icom_port *icom_port = to_icom_port(port); 1324 int retval; 1325 1326 kref_get(&icom_port->adapter->kref); 1327 retval = startup(icom_port); 1328 1329 if (retval) { 1330 kref_put(&icom_port->adapter->kref, icom_kref_release); 1331 trace(icom_port, "STARTUP_ERROR", 0); 1332 return retval; 1333 } 1334 1335 return 0; 1336} 1337 1338static void icom_close(struct uart_port *port) 1339{ 1340 struct icom_port *icom_port = to_icom_port(port); 1341 unsigned char cmdReg; 1342 1343 trace(icom_port, "CLOSE", 0); 1344 1345 /* stop receiver */ 1346 cmdReg = readb(&icom_port->dram->CmdReg); 1347 writeb(cmdReg & ~CMD_RCV_ENABLE, &icom_port->dram->CmdReg); 1348 1349 shutdown(icom_port); 1350 1351 kref_put(&icom_port->adapter->kref, icom_kref_release); 1352} 1353 1354static void icom_set_termios(struct uart_port *port, struct ktermios *termios, 1355 const struct ktermios *old_termios) 1356{ 1357 struct icom_port *icom_port = to_icom_port(port); 1358 int baud; 1359 unsigned cflag, iflag; 1360 char new_config2; 1361 char new_config3 = 0; 1362 char tmp_byte; 1363 int index; 1364 int rcv_buff, xmit_buff; 1365 unsigned long offset; 1366 unsigned long flags; 1367 1368 uart_port_lock_irqsave(port, &flags); 1369 trace(icom_port, "CHANGE_SPEED", 0); 1370 1371 cflag = termios->c_cflag; 1372 iflag = termios->c_iflag; 1373 1374 new_config2 = ICOM_ACFG_DRIVE1; 1375 1376 /* byte size and parity */ 1377 switch (cflag & CSIZE) { 1378 case CS5: /* 5 bits/char */ 1379 new_config2 |= ICOM_ACFG_5BPC; 1380 break; 1381 case CS6: /* 6 bits/char */ 1382 new_config2 |= ICOM_ACFG_6BPC; 1383 break; 1384 case CS7: /* 7 bits/char */ 1385 new_config2 |= ICOM_ACFG_7BPC; 1386 break; 1387 case CS8: /* 8 bits/char */ 1388 new_config2 |= ICOM_ACFG_8BPC; 1389 break; 1390 default: 1391 break; 1392 } 1393 if (cflag & CSTOPB) { 1394 /* 2 stop bits */ 1395 new_config2 |= ICOM_ACFG_2STOP_BIT; 1396 } 1397 if (cflag & PARENB) { 1398 /* parity bit enabled */ 1399 new_config2 |= ICOM_ACFG_PARITY_ENAB; 1400 trace(icom_port, "PARENB", 0); 1401 } 1402 if (cflag & PARODD) { 1403 /* odd parity */ 1404 new_config2 |= ICOM_ACFG_PARITY_ODD; 1405 trace(icom_port, "PARODD", 0); 1406 } 1407 1408 /* Determine divisor based on baud rate */ 1409 baud = uart_get_baud_rate(port, termios, old_termios, 1410 icom_acfg_baud[0], 1411 icom_acfg_baud[BAUD_TABLE_LIMIT]); 1412 if (!baud) 1413 baud = 9600; /* B0 transition handled in rs_set_termios */ 1414 1415 for (index = 0; index < BAUD_TABLE_LIMIT; index++) { 1416 if (icom_acfg_baud[index] == baud) { 1417 new_config3 = index; 1418 break; 1419 } 1420 } 1421 1422 uart_update_timeout(port, cflag, baud); 1423 1424 /* CTS flow control flag and modem status interrupts */ 1425 tmp_byte = readb(&(icom_port->dram->HDLCConfigReg)); 1426 if (cflag & CRTSCTS) 1427 tmp_byte |= HDLC_HDW_FLOW; 1428 else 1429 tmp_byte &= ~HDLC_HDW_FLOW; 1430 writeb(tmp_byte, &(icom_port->dram->HDLCConfigReg)); 1431 1432 /* 1433 * Set up parity check flag 1434 */ 1435 icom_port->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE; 1436 if (iflag & INPCK) 1437 icom_port->read_status_mask |= 1438 SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR; 1439 1440 if ((iflag & BRKINT) || (iflag & PARMRK)) 1441 icom_port->read_status_mask |= SA_FLAGS_BREAK_DET; 1442 1443 /* 1444 * Characters to ignore 1445 */ 1446 icom_port->ignore_status_mask = 0; 1447 if (iflag & IGNPAR) 1448 icom_port->ignore_status_mask |= 1449 SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR; 1450 if (iflag & IGNBRK) { 1451 icom_port->ignore_status_mask |= SA_FLAGS_BREAK_DET; 1452 /* 1453 * If we're ignore parity and break indicators, ignore 1454 * overruns too. (For real raw support). 1455 */ 1456 if (iflag & IGNPAR) 1457 icom_port->ignore_status_mask |= SA_FLAGS_OVERRUN; 1458 } 1459 1460 /* 1461 * !!! ignore all characters if CREAD is not set 1462 */ 1463 if ((cflag & CREAD) == 0) 1464 icom_port->ignore_status_mask |= SA_FL_RCV_DONE; 1465 1466 /* Turn off Receiver to prepare for reset */ 1467 writeb(CMD_RCV_DISABLE, &icom_port->dram->CmdReg); 1468 1469 for (index = 0; index < 10; index++) { 1470 if (readb(&icom_port->dram->PrevCmdReg) == 0x00) { 1471 break; 1472 } 1473 } 1474 1475 /* clear all current buffers of data */ 1476 for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) { 1477 icom_port->statStg->rcv[rcv_buff].flags = 0; 1478 icom_port->statStg->rcv[rcv_buff].leLength = 0; 1479 icom_port->statStg->rcv[rcv_buff].WorkingLength = 1480 cpu_to_le16(RCV_BUFF_SZ); 1481 } 1482 1483 for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) { 1484 icom_port->statStg->xmit[xmit_buff].flags = 0; 1485 } 1486 1487 /* activate changes and start xmit and receiver here */ 1488 /* Enable the receiver */ 1489 writeb(new_config3, &(icom_port->dram->async_config3)); 1490 writeb(new_config2, &(icom_port->dram->async_config2)); 1491 tmp_byte = readb(&(icom_port->dram->HDLCConfigReg)); 1492 tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL; 1493 writeb(tmp_byte, &(icom_port->dram->HDLCConfigReg)); 1494 writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */ 1495 writeb(0xFF, &(icom_port->dram->ier)); /* enable modem signal interrupts */ 1496 1497 /* reset processor */ 1498 writeb(CMD_RESTART, &icom_port->dram->CmdReg); 1499 1500 for (index = 0; index < 10; index++) { 1501 if (readb(&icom_port->dram->CmdReg) == 0x00) { 1502 break; 1503 } 1504 } 1505 1506 /* Enable Transmitter and Receiver */ 1507 offset = 1508 (unsigned long) &icom_port->statStg->rcv[0] - 1509 (unsigned long) icom_port->statStg; 1510 writel(icom_port->statStg_pci + offset, 1511 &icom_port->dram->RcvStatusAddr); 1512 icom_port->next_rcv = 0; 1513 *icom_port->xmitRestart = 0; 1514 writel(icom_port->xmitRestart_pci, 1515 &icom_port->dram->XmitStatusAddr); 1516 trace(icom_port, "XR_ENAB", 0); 1517 writeb(CMD_XMIT_RCV_ENABLE, &icom_port->dram->CmdReg); 1518 1519 uart_port_unlock_irqrestore(port, flags); 1520} 1521 1522static const char *icom_type(struct uart_port *port) 1523{ 1524 return "icom"; 1525} 1526 1527static void icom_config_port(struct uart_port *port, int flags) 1528{ 1529 port->type = PORT_ICOM; 1530} 1531 1532static const struct uart_ops icom_ops = { 1533 .tx_empty = icom_tx_empty, 1534 .set_mctrl = icom_set_mctrl, 1535 .get_mctrl = icom_get_mctrl, 1536 .stop_tx = icom_stop_tx, 1537 .start_tx = icom_start_tx, 1538 .send_xchar = icom_send_xchar, 1539 .stop_rx = icom_stop_rx, 1540 .break_ctl = icom_break, 1541 .startup = icom_open, 1542 .shutdown = icom_close, 1543 .set_termios = icom_set_termios, 1544 .type = icom_type, 1545 .config_port = icom_config_port, 1546}; 1547 1548#define ICOM_CONSOLE NULL 1549 1550static struct uart_driver icom_uart_driver = { 1551 .owner = THIS_MODULE, 1552 .driver_name = ICOM_DRIVER_NAME, 1553 .dev_name = "ttyA", 1554 .major = ICOM_MAJOR, 1555 .minor = ICOM_MINOR_START, 1556 .nr = NR_PORTS, 1557 .cons = ICOM_CONSOLE, 1558}; 1559 1560static int icom_init_ports(struct icom_adapter *icom_adapter) 1561{ 1562 u32 subsystem_id = icom_adapter->subsystem_id; 1563 int i; 1564 struct icom_port *icom_port; 1565 1566 if (icom_adapter->version == ADAPTER_V1) { 1567 icom_adapter->numb_ports = 2; 1568 1569 for (i = 0; i < 2; i++) { 1570 icom_port = &icom_adapter->port_info[i]; 1571 icom_port->port = i; 1572 icom_port->status = ICOM_PORT_ACTIVE; 1573 } 1574 } else { 1575 if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) { 1576 icom_adapter->numb_ports = 4; 1577 1578 for (i = 0; i < 4; i++) { 1579 icom_port = &icom_adapter->port_info[i]; 1580 1581 icom_port->port = i; 1582 icom_port->status = ICOM_PORT_ACTIVE; 1583 } 1584 } else { 1585 icom_adapter->numb_ports = 4; 1586 1587 icom_adapter->port_info[0].port = 0; 1588 icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE; 1589 icom_adapter->port_info[1].status = ICOM_PORT_OFF; 1590 icom_adapter->port_info[2].port = 2; 1591 icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE; 1592 icom_adapter->port_info[3].status = ICOM_PORT_OFF; 1593 } 1594 } 1595 1596 return 0; 1597} 1598 1599static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num) 1600{ 1601 if (icom_adapter->version == ADAPTER_V1) { 1602 icom_port->global_reg = icom_adapter->base_addr + 0x4000; 1603 icom_port->int_reg = icom_adapter->base_addr + 1604 0x4004 + 2 - 2 * port_num; 1605 } else { 1606 icom_port->global_reg = icom_adapter->base_addr + 0x8000; 1607 if (icom_port->port < 2) 1608 icom_port->int_reg = icom_adapter->base_addr + 1609 0x8004 + 2 - 2 * icom_port->port; 1610 else 1611 icom_port->int_reg = icom_adapter->base_addr + 1612 0x8024 + 2 - 2 * (icom_port->port - 2); 1613 } 1614} 1615static int icom_load_ports(struct icom_adapter *icom_adapter) 1616{ 1617 struct icom_port *icom_port; 1618 int port_num; 1619 1620 for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) { 1621 1622 icom_port = &icom_adapter->port_info[port_num]; 1623 1624 if (icom_port->status == ICOM_PORT_ACTIVE) { 1625 icom_port_active(icom_port, icom_adapter, port_num); 1626 icom_port->dram = icom_adapter->base_addr + 1627 0x2000 * icom_port->port; 1628 1629 icom_port->adapter = icom_adapter; 1630 1631 /* get port memory */ 1632 if (get_port_memory(icom_port) != 0) { 1633 dev_err(&icom_port->adapter->pci_dev->dev, 1634 "Memory allocation for port FAILED\n"); 1635 } 1636 } 1637 } 1638 return 0; 1639} 1640 1641static int icom_alloc_adapter(struct icom_adapter 1642 **icom_adapter_ref) 1643{ 1644 int adapter_count = 0; 1645 struct icom_adapter *icom_adapter; 1646 struct icom_adapter *cur_adapter_entry; 1647 1648 icom_adapter = kzalloc(sizeof(struct icom_adapter), GFP_KERNEL); 1649 1650 if (!icom_adapter) { 1651 return -ENOMEM; 1652 } 1653 1654 list_for_each_entry(cur_adapter_entry, &icom_adapter_head, 1655 icom_adapter_entry) { 1656 if (cur_adapter_entry->index != adapter_count) { 1657 break; 1658 } 1659 adapter_count++; 1660 } 1661 1662 icom_adapter->index = adapter_count; 1663 list_add_tail(&icom_adapter->icom_adapter_entry, 1664 &cur_adapter_entry->icom_adapter_entry); 1665 1666 *icom_adapter_ref = icom_adapter; 1667 return 0; 1668} 1669 1670static void icom_free_adapter(struct icom_adapter *icom_adapter) 1671{ 1672 list_del(&icom_adapter->icom_adapter_entry); 1673 kfree(icom_adapter); 1674} 1675 1676static void icom_kref_release(struct kref *kref) 1677{ 1678 struct icom_adapter *icom_adapter = container_of(kref, 1679 struct icom_adapter, kref); 1680 struct icom_port *icom_port; 1681 int index; 1682 1683 for (index = 0; index < icom_adapter->numb_ports; index++) { 1684 icom_port = &icom_adapter->port_info[index]; 1685 1686 if (icom_port->status == ICOM_PORT_ACTIVE) { 1687 dev_info(&icom_adapter->pci_dev->dev, 1688 "Device removed\n"); 1689 1690 uart_remove_one_port(&icom_uart_driver, 1691 &icom_port->uart_port); 1692 1693 /* be sure that DTR and RTS are dropped */ 1694 writeb(0x00, &icom_port->dram->osr); 1695 1696 /* Wait 0.1 Sec for simple Init to complete */ 1697 msleep(100); 1698 1699 /* Stop proccessor */ 1700 stop_processor(icom_port); 1701 1702 free_port_memory(icom_port); 1703 } 1704 } 1705 1706 free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter); 1707 iounmap(icom_adapter->base_addr); 1708 pci_release_regions(icom_adapter->pci_dev); 1709 icom_free_adapter(icom_adapter); 1710} 1711 1712static int icom_probe(struct pci_dev *dev, 1713 const struct pci_device_id *ent) 1714{ 1715 int index; 1716 unsigned int command_reg; 1717 int retval; 1718 struct icom_adapter *icom_adapter; 1719 struct icom_port *icom_port; 1720 1721 retval = pci_enable_device(dev); 1722 if (retval) { 1723 dev_err(&dev->dev, "Device enable FAILED\n"); 1724 return retval; 1725 } 1726 1727 retval = pci_request_regions(dev, "icom"); 1728 if (retval) { 1729 dev_err(&dev->dev, "pci_request_regions FAILED\n"); 1730 pci_disable_device(dev); 1731 return retval; 1732 } 1733 1734 pci_set_master(dev); 1735 1736 retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg); 1737 if (retval) { 1738 dev_err(&dev->dev, "PCI Config read FAILED\n"); 1739 goto probe_exit0; 1740 } 1741 1742 pci_write_config_dword(dev, PCI_COMMAND, 1743 command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER 1744 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR); 1745 1746 if (ent->driver_data == ADAPTER_V1) { 1747 pci_write_config_dword(dev, 0x44, 0x8300830A); 1748 } else { 1749 pci_write_config_dword(dev, 0x44, 0x42004200); 1750 pci_write_config_dword(dev, 0x48, 0x42004200); 1751 } 1752 1753 1754 retval = icom_alloc_adapter(&icom_adapter); 1755 if (retval) { 1756 dev_err(&dev->dev, "icom_alloc_adapter FAILED\n"); 1757 retval = -EIO; 1758 goto probe_exit0; 1759 } 1760 1761 icom_adapter->base_addr_pci = pci_resource_start(dev, 0); 1762 icom_adapter->pci_dev = dev; 1763 icom_adapter->version = ent->driver_data; 1764 icom_adapter->subsystem_id = ent->subdevice; 1765 1766 1767 retval = icom_init_ports(icom_adapter); 1768 if (retval) { 1769 dev_err(&dev->dev, "Port configuration failed\n"); 1770 goto probe_exit1; 1771 } 1772 1773 icom_adapter->base_addr = pci_ioremap_bar(dev, 0); 1774 1775 if (!icom_adapter->base_addr) { 1776 retval = -ENOMEM; 1777 goto probe_exit1; 1778 } 1779 1780 /* save off irq and request irq line */ 1781 retval = request_irq(dev->irq, icom_interrupt, IRQF_SHARED, ICOM_DRIVER_NAME, (void *)icom_adapter); 1782 if (retval) { 1783 goto probe_exit2; 1784 } 1785 1786 retval = icom_load_ports(icom_adapter); 1787 1788 for (index = 0; index < icom_adapter->numb_ports; index++) { 1789 icom_port = &icom_adapter->port_info[index]; 1790 1791 if (icom_port->status == ICOM_PORT_ACTIVE) { 1792 icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq; 1793 icom_port->uart_port.type = PORT_ICOM; 1794 icom_port->uart_port.iotype = UPIO_MEM; 1795 icom_port->uart_port.membase = 1796 (unsigned char __iomem *)icom_adapter->base_addr_pci; 1797 icom_port->uart_port.fifosize = 16; 1798 icom_port->uart_port.ops = &icom_ops; 1799 icom_port->uart_port.line = 1800 icom_port->port + icom_adapter->index * 4; 1801 if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) { 1802 icom_port->status = ICOM_PORT_OFF; 1803 dev_err(&dev->dev, "Device add failed\n"); 1804 } else 1805 dev_info(&dev->dev, "Device added\n"); 1806 } 1807 } 1808 1809 kref_init(&icom_adapter->kref); 1810 return 0; 1811 1812probe_exit2: 1813 iounmap(icom_adapter->base_addr); 1814probe_exit1: 1815 icom_free_adapter(icom_adapter); 1816 1817probe_exit0: 1818 pci_release_regions(dev); 1819 pci_disable_device(dev); 1820 1821 return retval; 1822} 1823 1824static void icom_remove(struct pci_dev *dev) 1825{ 1826 struct icom_adapter *icom_adapter; 1827 1828 list_for_each_entry(icom_adapter, &icom_adapter_head, 1829 icom_adapter_entry) { 1830 if (icom_adapter->pci_dev == dev) { 1831 kref_put(&icom_adapter->kref, icom_kref_release); 1832 return; 1833 } 1834 } 1835 1836 dev_err(&dev->dev, "Unable to find device to remove\n"); 1837} 1838 1839static struct pci_driver icom_pci_driver = { 1840 .name = ICOM_DRIVER_NAME, 1841 .id_table = icom_pci_table, 1842 .probe = icom_probe, 1843 .remove = icom_remove, 1844}; 1845 1846static int __init icom_init(void) 1847{ 1848 int ret; 1849 1850 ret = uart_register_driver(&icom_uart_driver); 1851 if (ret) 1852 return ret; 1853 1854 ret = pci_register_driver(&icom_pci_driver); 1855 1856 if (ret < 0) 1857 uart_unregister_driver(&icom_uart_driver); 1858 1859 return ret; 1860} 1861 1862static void __exit icom_exit(void) 1863{ 1864 pci_unregister_driver(&icom_pci_driver); 1865 uart_unregister_driver(&icom_uart_driver); 1866} 1867 1868module_init(icom_init); 1869module_exit(icom_exit); 1870 1871MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>"); 1872MODULE_DESCRIPTION("IBM iSeries Serial IOA driver"); 1873MODULE_LICENSE("GPL"); 1874MODULE_FIRMWARE("icom_call_setup.bin"); 1875MODULE_FIRMWARE("icom_res_dce.bin"); 1876MODULE_FIRMWARE("icom_asc.bin"); 1877