1 /* 2 * icom.c 3 * 4 * Copyright (C) 2001 IBM Corporation. All rights reserved. 5 * 6 * Serial device driver. 7 * 8 * Based on code from serial.c 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 * 24 */ 25 #include <linux/module.h> 26 #include <linux/kernel.h> 27 #include <linux/errno.h> 28 #include <linux/signal.h> 29 #include <linux/timer.h> 30 #include <linux/interrupt.h> 31 #include <linux/tty.h> 32 #include <linux/termios.h> 33 #include <linux/fs.h> 34 #include <linux/tty_flip.h> 35 #include <linux/serial.h> 36 #include <linux/serial_reg.h> 37 #include <linux/major.h> 38 #include <linux/string.h> 39 #include <linux/fcntl.h> 40 #include <linux/ptrace.h> 41 #include <linux/ioport.h> 42 #include <linux/mm.h> 43 #include <linux/slab.h> 44 #include <linux/init.h> 45 #include <linux/delay.h> 46 #include <linux/pci.h> 47 #include <linux/vmalloc.h> 48 #include <linux/smp.h> 49 #include <linux/spinlock.h> 50 #include <linux/kref.h> 51 #include <linux/firmware.h> 52 #include <linux/bitops.h> 53 54 #include <asm/io.h> 55 #include <asm/irq.h> 56 #include <asm/uaccess.h> 57 58 #include "icom.h" 59 60 /*#define ICOM_TRACE enable port trace capabilities */ 61 62 #define ICOM_DRIVER_NAME "icom" 63 #define ICOM_VERSION_STR "1.3.1" 64 #define NR_PORTS 128 65 #define ICOM_PORT ((struct icom_port *)port) 66 #define to_icom_adapter(d) container_of(d, struct icom_adapter, kref) 67 68 static const struct pci_device_id icom_pci_table[] = { 69 { 70 .vendor = PCI_VENDOR_ID_IBM, 71 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1, 72 .subvendor = PCI_ANY_ID, 73 .subdevice = PCI_ANY_ID, 74 .driver_data = ADAPTER_V1, 75 }, 76 { 77 .vendor = PCI_VENDOR_ID_IBM, 78 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 79 .subvendor = PCI_VENDOR_ID_IBM, 80 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX, 81 .driver_data = ADAPTER_V2, 82 }, 83 { 84 .vendor = PCI_VENDOR_ID_IBM, 85 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 86 .subvendor = PCI_VENDOR_ID_IBM, 87 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM, 88 .driver_data = ADAPTER_V2, 89 }, 90 { 91 .vendor = PCI_VENDOR_ID_IBM, 92 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 93 .subvendor = PCI_VENDOR_ID_IBM, 94 .subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL, 95 .driver_data = ADAPTER_V2, 96 }, 97 { 98 .vendor = PCI_VENDOR_ID_IBM, 99 .device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2, 100 .subvendor = PCI_VENDOR_ID_IBM, 101 .subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM_PCIE, 102 .driver_data = ADAPTER_V2, 103 }, 104 {} 105 }; 106 107 static struct lookup_proc_table start_proc[4] = { 108 {NULL, ICOM_CONTROL_START_A}, 109 {NULL, ICOM_CONTROL_START_B}, 110 {NULL, ICOM_CONTROL_START_C}, 111 {NULL, ICOM_CONTROL_START_D} 112 }; 113 114 115 static struct lookup_proc_table stop_proc[4] = { 116 {NULL, ICOM_CONTROL_STOP_A}, 117 {NULL, ICOM_CONTROL_STOP_B}, 118 {NULL, ICOM_CONTROL_STOP_C}, 119 {NULL, ICOM_CONTROL_STOP_D} 120 }; 121 122 static struct lookup_int_table int_mask_tbl[4] = { 123 {NULL, ICOM_INT_MASK_PRC_A}, 124 {NULL, ICOM_INT_MASK_PRC_B}, 125 {NULL, ICOM_INT_MASK_PRC_C}, 126 {NULL, ICOM_INT_MASK_PRC_D}, 127 }; 128 129 130 MODULE_DEVICE_TABLE(pci, icom_pci_table); 131 132 static LIST_HEAD(icom_adapter_head); 133 134 /* spinlock for adapter initialization and changing adapter operations */ 135 static spinlock_t icom_lock; 136 137 #ifdef ICOM_TRACE 138 static inline void trace(struct icom_port *icom_port, char *trace_pt, 139 unsigned long trace_data) 140 { 141 dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n", 142 icom_port->port, trace_pt, trace_data); 143 } 144 #else 145 static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {}; 146 #endif 147 static void icom_kref_release(struct kref *kref); 148 149 static void free_port_memory(struct icom_port *icom_port) 150 { 151 struct pci_dev *dev = icom_port->adapter->pci_dev; 152 153 trace(icom_port, "RET_PORT_MEM", 0); 154 if (icom_port->recv_buf) { 155 pci_free_consistent(dev, 4096, icom_port->recv_buf, 156 icom_port->recv_buf_pci); 157 icom_port->recv_buf = NULL; 158 } 159 if (icom_port->xmit_buf) { 160 pci_free_consistent(dev, 4096, icom_port->xmit_buf, 161 icom_port->xmit_buf_pci); 162 icom_port->xmit_buf = NULL; 163 } 164 if (icom_port->statStg) { 165 pci_free_consistent(dev, 4096, icom_port->statStg, 166 icom_port->statStg_pci); 167 icom_port->statStg = NULL; 168 } 169 170 if (icom_port->xmitRestart) { 171 pci_free_consistent(dev, 4096, icom_port->xmitRestart, 172 icom_port->xmitRestart_pci); 173 icom_port->xmitRestart = NULL; 174 } 175 } 176 177 static int get_port_memory(struct icom_port *icom_port) 178 { 179 int index; 180 unsigned long stgAddr; 181 unsigned long startStgAddr; 182 unsigned long offset; 183 struct pci_dev *dev = icom_port->adapter->pci_dev; 184 185 icom_port->xmit_buf = 186 pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci); 187 if (!icom_port->xmit_buf) { 188 dev_err(&dev->dev, "Can not allocate Transmit buffer\n"); 189 return -ENOMEM; 190 } 191 192 trace(icom_port, "GET_PORT_MEM", 193 (unsigned long) icom_port->xmit_buf); 194 195 icom_port->recv_buf = 196 pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci); 197 if (!icom_port->recv_buf) { 198 dev_err(&dev->dev, "Can not allocate Receive buffer\n"); 199 free_port_memory(icom_port); 200 return -ENOMEM; 201 } 202 trace(icom_port, "GET_PORT_MEM", 203 (unsigned long) icom_port->recv_buf); 204 205 icom_port->statStg = 206 pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci); 207 if (!icom_port->statStg) { 208 dev_err(&dev->dev, "Can not allocate Status buffer\n"); 209 free_port_memory(icom_port); 210 return -ENOMEM; 211 } 212 trace(icom_port, "GET_PORT_MEM", 213 (unsigned long) icom_port->statStg); 214 215 icom_port->xmitRestart = 216 pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci); 217 if (!icom_port->xmitRestart) { 218 dev_err(&dev->dev, 219 "Can not allocate xmit Restart buffer\n"); 220 free_port_memory(icom_port); 221 return -ENOMEM; 222 } 223 224 memset(icom_port->statStg, 0, 4096); 225 226 /* FODs: Frame Out Descriptor Queue, this is a FIFO queue that 227 indicates that frames are to be transmitted 228 */ 229 230 stgAddr = (unsigned long) icom_port->statStg; 231 for (index = 0; index < NUM_XBUFFS; index++) { 232 trace(icom_port, "FOD_ADDR", stgAddr); 233 stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]); 234 if (index < (NUM_XBUFFS - 1)) { 235 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); 236 icom_port->statStg->xmit[index].leLengthASD = 237 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ); 238 trace(icom_port, "FOD_ADDR", stgAddr); 239 trace(icom_port, "FOD_XBUFF", 240 (unsigned long) icom_port->xmit_buf); 241 icom_port->statStg->xmit[index].leBuffer = 242 cpu_to_le32(icom_port->xmit_buf_pci); 243 } else if (index == (NUM_XBUFFS - 1)) { 244 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); 245 icom_port->statStg->xmit[index].leLengthASD = 246 (unsigned short int) cpu_to_le16(XMIT_BUFF_SZ); 247 trace(icom_port, "FOD_XBUFF", 248 (unsigned long) icom_port->xmit_buf); 249 icom_port->statStg->xmit[index].leBuffer = 250 cpu_to_le32(icom_port->xmit_buf_pci); 251 } else { 252 memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area)); 253 } 254 } 255 /* FIDs */ 256 startStgAddr = stgAddr; 257 258 /* fill in every entry, even if no buffer */ 259 for (index = 0; index < NUM_RBUFFS; index++) { 260 trace(icom_port, "FID_ADDR", stgAddr); 261 stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]); 262 icom_port->statStg->rcv[index].leLength = 0; 263 icom_port->statStg->rcv[index].WorkingLength = 264 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ); 265 if (index < (NUM_RBUFFS - 1) ) { 266 offset = stgAddr - (unsigned long) icom_port->statStg; 267 icom_port->statStg->rcv[index].leNext = 268 cpu_to_le32(icom_port-> statStg_pci + offset); 269 trace(icom_port, "FID_RBUFF", 270 (unsigned long) icom_port->recv_buf); 271 icom_port->statStg->rcv[index].leBuffer = 272 cpu_to_le32(icom_port->recv_buf_pci); 273 } else if (index == (NUM_RBUFFS -1) ) { 274 offset = startStgAddr - (unsigned long) icom_port->statStg; 275 icom_port->statStg->rcv[index].leNext = 276 cpu_to_le32(icom_port-> statStg_pci + offset); 277 trace(icom_port, "FID_RBUFF", 278 (unsigned long) icom_port->recv_buf + 2048); 279 icom_port->statStg->rcv[index].leBuffer = 280 cpu_to_le32(icom_port->recv_buf_pci + 2048); 281 } else { 282 icom_port->statStg->rcv[index].leNext = 0; 283 icom_port->statStg->rcv[index].leBuffer = 0; 284 } 285 } 286 287 return 0; 288 } 289 290 static void stop_processor(struct icom_port *icom_port) 291 { 292 unsigned long temp; 293 unsigned long flags; 294 int port; 295 296 spin_lock_irqsave(&icom_lock, flags); 297 298 port = icom_port->port; 299 if (port >= ARRAY_SIZE(stop_proc)) { 300 dev_err(&icom_port->adapter->pci_dev->dev, 301 "Invalid port assignment\n"); 302 goto unlock; 303 } 304 305 if (port == 0 || port == 1) 306 stop_proc[port].global_control_reg = &icom_port->global_reg->control; 307 else 308 stop_proc[port].global_control_reg = &icom_port->global_reg->control_2; 309 310 temp = readl(stop_proc[port].global_control_reg); 311 temp = (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id; 312 writel(temp, stop_proc[port].global_control_reg); 313 314 /* write flush */ 315 readl(stop_proc[port].global_control_reg); 316 317 unlock: 318 spin_unlock_irqrestore(&icom_lock, flags); 319 } 320 321 static void start_processor(struct icom_port *icom_port) 322 { 323 unsigned long temp; 324 unsigned long flags; 325 int port; 326 327 spin_lock_irqsave(&icom_lock, flags); 328 329 port = icom_port->port; 330 if (port >= ARRAY_SIZE(start_proc)) { 331 dev_err(&icom_port->adapter->pci_dev->dev, 332 "Invalid port assignment\n"); 333 goto unlock; 334 } 335 336 if (port == 0 || port == 1) 337 start_proc[port].global_control_reg = &icom_port->global_reg->control; 338 else 339 start_proc[port].global_control_reg = &icom_port->global_reg->control_2; 340 341 temp = readl(start_proc[port].global_control_reg); 342 temp = (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id; 343 writel(temp, start_proc[port].global_control_reg); 344 345 /* write flush */ 346 readl(start_proc[port].global_control_reg); 347 348 unlock: 349 spin_unlock_irqrestore(&icom_lock, flags); 350 } 351 352 static void load_code(struct icom_port *icom_port) 353 { 354 const struct firmware *fw; 355 char __iomem *iram_ptr; 356 int index; 357 int status = 0; 358 void __iomem *dram_ptr = icom_port->dram; 359 dma_addr_t temp_pci; 360 unsigned char *new_page = NULL; 361 unsigned char cable_id = NO_CABLE; 362 struct pci_dev *dev = icom_port->adapter->pci_dev; 363 364 /* Clear out any pending interrupts */ 365 writew(0x3FFF, icom_port->int_reg); 366 367 trace(icom_port, "CLEAR_INTERRUPTS", 0); 368 369 /* Stop processor */ 370 stop_processor(icom_port); 371 372 /* Zero out DRAM */ 373 memset_io(dram_ptr, 0, 512); 374 375 /* Load Call Setup into Adapter */ 376 if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) { 377 dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n"); 378 status = -1; 379 goto load_code_exit; 380 } 381 382 if (fw->size > ICOM_DCE_IRAM_OFFSET) { 383 dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n"); 384 release_firmware(fw); 385 status = -1; 386 goto load_code_exit; 387 } 388 389 iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET; 390 for (index = 0; index < fw->size; index++) 391 writeb(fw->data[index], &iram_ptr[index]); 392 393 release_firmware(fw); 394 395 /* Load Resident DCE portion of Adapter */ 396 if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) { 397 dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n"); 398 status = -1; 399 goto load_code_exit; 400 } 401 402 if (fw->size > ICOM_IRAM_SIZE) { 403 dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n"); 404 release_firmware(fw); 405 status = -1; 406 goto load_code_exit; 407 } 408 409 iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET; 410 for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++) 411 writeb(fw->data[index], &iram_ptr[index]); 412 413 release_firmware(fw); 414 415 /* Set Hardware level */ 416 if (icom_port->adapter->version == ADAPTER_V2) 417 writeb(V2_HARDWARE, &(icom_port->dram->misc_flags)); 418 419 /* Start the processor in Adapter */ 420 start_processor(icom_port); 421 422 writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL), 423 &(icom_port->dram->HDLCConfigReg)); 424 writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */ 425 writeb(0x00, &(icom_port->dram->CmdReg)); 426 writeb(0x10, &(icom_port->dram->async_config3)); 427 writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC | 428 ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2)); 429 430 /*Set up data in icom DRAM to indicate where personality 431 *code is located and its length. 432 */ 433 new_page = pci_alloc_consistent(dev, 4096, &temp_pci); 434 435 if (!new_page) { 436 dev_err(&dev->dev, "Can not allocate DMA buffer\n"); 437 status = -1; 438 goto load_code_exit; 439 } 440 441 if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) { 442 dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n"); 443 status = -1; 444 goto load_code_exit; 445 } 446 447 if (fw->size > ICOM_DCE_IRAM_OFFSET) { 448 dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n"); 449 release_firmware(fw); 450 status = -1; 451 goto load_code_exit; 452 } 453 454 for (index = 0; index < fw->size; index++) 455 new_page[index] = fw->data[index]; 456 457 writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length); 458 writel(temp_pci, &icom_port->dram->mac_load_addr); 459 460 release_firmware(fw); 461 462 /*Setting the syncReg to 0x80 causes adapter to start downloading 463 the personality code into adapter instruction RAM. 464 Once code is loaded, it will begin executing and, based on 465 information provided above, will start DMAing data from 466 shared memory to adapter DRAM. 467 */ 468 /* the wait loop below verifies this write operation has been done 469 and processed 470 */ 471 writeb(START_DOWNLOAD, &icom_port->dram->sync); 472 473 /* Wait max 1 Sec for data download and processor to start */ 474 for (index = 0; index < 10; index++) { 475 msleep(100); 476 if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE) 477 break; 478 } 479 480 if (index == 10) 481 status = -1; 482 483 /* 484 * check Cable ID 485 */ 486 cable_id = readb(&icom_port->dram->cable_id); 487 488 if (cable_id & ICOM_CABLE_ID_VALID) { 489 /* Get cable ID into the lower 4 bits (standard form) */ 490 cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4; 491 icom_port->cable_id = cable_id; 492 } else { 493 dev_err(&dev->dev,"Invalid or no cable attached\n"); 494 icom_port->cable_id = NO_CABLE; 495 } 496 497 load_code_exit: 498 499 if (status != 0) { 500 /* Clear out any pending interrupts */ 501 writew(0x3FFF, icom_port->int_reg); 502 503 /* Turn off port */ 504 writeb(ICOM_DISABLE, &(icom_port->dram->disable)); 505 506 /* Stop processor */ 507 stop_processor(icom_port); 508 509 dev_err(&icom_port->adapter->pci_dev->dev,"Port not operational\n"); 510 } 511 512 if (new_page != NULL) 513 pci_free_consistent(dev, 4096, new_page, temp_pci); 514 } 515 516 static int startup(struct icom_port *icom_port) 517 { 518 unsigned long temp; 519 unsigned char cable_id, raw_cable_id; 520 unsigned long flags; 521 int port; 522 523 trace(icom_port, "STARTUP", 0); 524 525 if (!icom_port->dram) { 526 /* should NEVER be NULL */ 527 dev_err(&icom_port->adapter->pci_dev->dev, 528 "Unusable Port, port configuration missing\n"); 529 return -ENODEV; 530 } 531 532 /* 533 * check Cable ID 534 */ 535 raw_cable_id = readb(&icom_port->dram->cable_id); 536 trace(icom_port, "CABLE_ID", raw_cable_id); 537 538 /* Get cable ID into the lower 4 bits (standard form) */ 539 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4; 540 541 /* Check for valid Cable ID */ 542 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) || 543 (cable_id != icom_port->cable_id)) { 544 545 /* reload adapter code, pick up any potential changes in cable id */ 546 load_code(icom_port); 547 548 /* still no sign of cable, error out */ 549 raw_cable_id = readb(&icom_port->dram->cable_id); 550 cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4; 551 if (!(raw_cable_id & ICOM_CABLE_ID_VALID) || 552 (icom_port->cable_id == NO_CABLE)) 553 return -EIO; 554 } 555 556 /* 557 * Finally, clear and enable interrupts 558 */ 559 spin_lock_irqsave(&icom_lock, flags); 560 port = icom_port->port; 561 if (port >= ARRAY_SIZE(int_mask_tbl)) { 562 dev_err(&icom_port->adapter->pci_dev->dev, 563 "Invalid port assignment\n"); 564 goto unlock; 565 } 566 567 if (port == 0 || port == 1) 568 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask; 569 else 570 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2; 571 572 if (port == 0 || port == 2) 573 writew(0x00FF, icom_port->int_reg); 574 else 575 writew(0x3F00, icom_port->int_reg); 576 577 temp = readl(int_mask_tbl[port].global_int_mask); 578 writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask); 579 580 /* write flush */ 581 readl(int_mask_tbl[port].global_int_mask); 582 583 unlock: 584 spin_unlock_irqrestore(&icom_lock, flags); 585 return 0; 586 } 587 588 static void shutdown(struct icom_port *icom_port) 589 { 590 unsigned long temp; 591 unsigned char cmdReg; 592 unsigned long flags; 593 int port; 594 595 spin_lock_irqsave(&icom_lock, flags); 596 trace(icom_port, "SHUTDOWN", 0); 597 598 /* 599 * disable all interrupts 600 */ 601 port = icom_port->port; 602 if (port >= ARRAY_SIZE(int_mask_tbl)) { 603 dev_err(&icom_port->adapter->pci_dev->dev, 604 "Invalid port assignment\n"); 605 goto unlock; 606 } 607 if (port == 0 || port == 1) 608 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask; 609 else 610 int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2; 611 612 temp = readl(int_mask_tbl[port].global_int_mask); 613 writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask); 614 615 /* write flush */ 616 readl(int_mask_tbl[port].global_int_mask); 617 618 unlock: 619 spin_unlock_irqrestore(&icom_lock, flags); 620 621 /* 622 * disable break condition 623 */ 624 cmdReg = readb(&icom_port->dram->CmdReg); 625 if (cmdReg & CMD_SND_BREAK) { 626 writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg); 627 } 628 } 629 630 static int icom_write(struct uart_port *port) 631 { 632 unsigned long data_count; 633 unsigned char cmdReg; 634 unsigned long offset; 635 int temp_tail = port->state->xmit.tail; 636 637 trace(ICOM_PORT, "WRITE", 0); 638 639 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) & 640 SA_FLAGS_READY_TO_XMIT) { 641 trace(ICOM_PORT, "WRITE_FULL", 0); 642 return 0; 643 } 644 645 data_count = 0; 646 while ((port->state->xmit.head != temp_tail) && 647 (data_count <= XMIT_BUFF_SZ)) { 648 649 ICOM_PORT->xmit_buf[data_count++] = 650 port->state->xmit.buf[temp_tail]; 651 652 temp_tail++; 653 temp_tail &= (UART_XMIT_SIZE - 1); 654 } 655 656 if (data_count) { 657 ICOM_PORT->statStg->xmit[0].flags = 658 cpu_to_le16(SA_FLAGS_READY_TO_XMIT); 659 ICOM_PORT->statStg->xmit[0].leLength = 660 cpu_to_le16(data_count); 661 offset = 662 (unsigned long) &ICOM_PORT->statStg->xmit[0] - 663 (unsigned long) ICOM_PORT->statStg; 664 *ICOM_PORT->xmitRestart = 665 cpu_to_le32(ICOM_PORT->statStg_pci + offset); 666 cmdReg = readb(&ICOM_PORT->dram->CmdReg); 667 writeb(cmdReg | CMD_XMIT_RCV_ENABLE, 668 &ICOM_PORT->dram->CmdReg); 669 writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd); 670 trace(ICOM_PORT, "WRITE_START", data_count); 671 /* write flush */ 672 readb(&ICOM_PORT->dram->StartXmitCmd); 673 } 674 675 return data_count; 676 } 677 678 static inline void check_modem_status(struct icom_port *icom_port) 679 { 680 static char old_status = 0; 681 char delta_status; 682 unsigned char status; 683 684 spin_lock(&icom_port->uart_port.lock); 685 686 /*modem input register */ 687 status = readb(&icom_port->dram->isr); 688 trace(icom_port, "CHECK_MODEM", status); 689 delta_status = status ^ old_status; 690 if (delta_status) { 691 if (delta_status & ICOM_RI) 692 icom_port->uart_port.icount.rng++; 693 if (delta_status & ICOM_DSR) 694 icom_port->uart_port.icount.dsr++; 695 if (delta_status & ICOM_DCD) 696 uart_handle_dcd_change(&icom_port->uart_port, 697 delta_status & ICOM_DCD); 698 if (delta_status & ICOM_CTS) 699 uart_handle_cts_change(&icom_port->uart_port, 700 delta_status & ICOM_CTS); 701 702 wake_up_interruptible(&icom_port->uart_port.state-> 703 port.delta_msr_wait); 704 old_status = status; 705 } 706 spin_unlock(&icom_port->uart_port.lock); 707 } 708 709 static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port) 710 { 711 unsigned short int count; 712 int i; 713 714 if (port_int_reg & (INT_XMIT_COMPLETED)) { 715 trace(icom_port, "XMIT_COMPLETE", 0); 716 717 /* clear buffer in use bit */ 718 icom_port->statStg->xmit[0].flags &= 719 cpu_to_le16(~SA_FLAGS_READY_TO_XMIT); 720 721 count = (unsigned short int) 722 cpu_to_le16(icom_port->statStg->xmit[0].leLength); 723 icom_port->uart_port.icount.tx += count; 724 725 for (i=0; i<count && 726 !uart_circ_empty(&icom_port->uart_port.state->xmit); i++) { 727 728 icom_port->uart_port.state->xmit.tail++; 729 icom_port->uart_port.state->xmit.tail &= 730 (UART_XMIT_SIZE - 1); 731 } 732 733 if (!icom_write(&icom_port->uart_port)) 734 /* activate write queue */ 735 uart_write_wakeup(&icom_port->uart_port); 736 } else 737 trace(icom_port, "XMIT_DISABLED", 0); 738 } 739 740 static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port) 741 { 742 short int count, rcv_buff; 743 struct tty_port *port = &icom_port->uart_port.state->port; 744 unsigned short int status; 745 struct uart_icount *icount; 746 unsigned long offset; 747 unsigned char flag; 748 749 trace(icom_port, "RCV_COMPLETE", 0); 750 rcv_buff = icom_port->next_rcv; 751 752 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags); 753 while (status & SA_FL_RCV_DONE) { 754 int first = -1; 755 756 trace(icom_port, "FID_STATUS", status); 757 count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength); 758 759 trace(icom_port, "RCV_COUNT", count); 760 761 trace(icom_port, "REAL_COUNT", count); 762 763 offset = 764 cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) - 765 icom_port->recv_buf_pci; 766 767 /* Block copy all but the last byte as this may have status */ 768 if (count > 0) { 769 first = icom_port->recv_buf[offset]; 770 tty_insert_flip_string(port, icom_port->recv_buf + offset, count - 1); 771 } 772 773 icount = &icom_port->uart_port.icount; 774 icount->rx += count; 775 776 /* Break detect logic */ 777 if ((status & SA_FLAGS_FRAME_ERROR) 778 && first == 0) { 779 status &= ~SA_FLAGS_FRAME_ERROR; 780 status |= SA_FLAGS_BREAK_DET; 781 trace(icom_port, "BREAK_DET", 0); 782 } 783 784 flag = TTY_NORMAL; 785 786 if (status & 787 (SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR | 788 SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) { 789 790 if (status & SA_FLAGS_BREAK_DET) 791 icount->brk++; 792 if (status & SA_FLAGS_PARITY_ERROR) 793 icount->parity++; 794 if (status & SA_FLAGS_FRAME_ERROR) 795 icount->frame++; 796 if (status & SA_FLAGS_OVERRUN) 797 icount->overrun++; 798 799 /* 800 * Now check to see if character should be 801 * ignored, and mask off conditions which 802 * should be ignored. 803 */ 804 if (status & icom_port->ignore_status_mask) { 805 trace(icom_port, "IGNORE_CHAR", 0); 806 goto ignore_char; 807 } 808 809 status &= icom_port->read_status_mask; 810 811 if (status & SA_FLAGS_BREAK_DET) { 812 flag = TTY_BREAK; 813 } else if (status & SA_FLAGS_PARITY_ERROR) { 814 trace(icom_port, "PARITY_ERROR", 0); 815 flag = TTY_PARITY; 816 } else if (status & SA_FLAGS_FRAME_ERROR) 817 flag = TTY_FRAME; 818 819 } 820 821 tty_insert_flip_char(port, *(icom_port->recv_buf + offset + count - 1), flag); 822 823 if (status & SA_FLAGS_OVERRUN) 824 /* 825 * Overrun is special, since it's 826 * reported immediately, and doesn't 827 * affect the current character 828 */ 829 tty_insert_flip_char(port, 0, TTY_OVERRUN); 830 ignore_char: 831 icom_port->statStg->rcv[rcv_buff].flags = 0; 832 icom_port->statStg->rcv[rcv_buff].leLength = 0; 833 icom_port->statStg->rcv[rcv_buff].WorkingLength = 834 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ); 835 836 rcv_buff++; 837 if (rcv_buff == NUM_RBUFFS) 838 rcv_buff = 0; 839 840 status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags); 841 } 842 icom_port->next_rcv = rcv_buff; 843 844 spin_unlock(&icom_port->uart_port.lock); 845 tty_flip_buffer_push(port); 846 spin_lock(&icom_port->uart_port.lock); 847 } 848 849 static void process_interrupt(u16 port_int_reg, 850 struct icom_port *icom_port) 851 { 852 853 spin_lock(&icom_port->uart_port.lock); 854 trace(icom_port, "INTERRUPT", port_int_reg); 855 856 if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED)) 857 xmit_interrupt(port_int_reg, icom_port); 858 859 if (port_int_reg & INT_RCV_COMPLETED) 860 recv_interrupt(port_int_reg, icom_port); 861 862 spin_unlock(&icom_port->uart_port.lock); 863 } 864 865 static irqreturn_t icom_interrupt(int irq, void *dev_id) 866 { 867 void __iomem * int_reg; 868 u32 adapter_interrupts; 869 u16 port_int_reg; 870 struct icom_adapter *icom_adapter; 871 struct icom_port *icom_port; 872 873 /* find icom_port for this interrupt */ 874 icom_adapter = (struct icom_adapter *) dev_id; 875 876 if (icom_adapter->version == ADAPTER_V2) { 877 int_reg = icom_adapter->base_addr + 0x8024; 878 879 adapter_interrupts = readl(int_reg); 880 881 if (adapter_interrupts & 0x00003FFF) { 882 /* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */ 883 icom_port = &icom_adapter->port_info[2]; 884 port_int_reg = (u16) adapter_interrupts; 885 process_interrupt(port_int_reg, icom_port); 886 check_modem_status(icom_port); 887 } 888 if (adapter_interrupts & 0x3FFF0000) { 889 /* port 3 interrupt */ 890 icom_port = &icom_adapter->port_info[3]; 891 if (icom_port->status == ICOM_PORT_ACTIVE) { 892 port_int_reg = 893 (u16) (adapter_interrupts >> 16); 894 process_interrupt(port_int_reg, icom_port); 895 check_modem_status(icom_port); 896 } 897 } 898 899 /* Clear out any pending interrupts */ 900 writel(adapter_interrupts, int_reg); 901 902 int_reg = icom_adapter->base_addr + 0x8004; 903 } else { 904 int_reg = icom_adapter->base_addr + 0x4004; 905 } 906 907 adapter_interrupts = readl(int_reg); 908 909 if (adapter_interrupts & 0x00003FFF) { 910 /* port 0 interrupt, NOTE: for all adapters, port 0 will be active */ 911 icom_port = &icom_adapter->port_info[0]; 912 port_int_reg = (u16) adapter_interrupts; 913 process_interrupt(port_int_reg, icom_port); 914 check_modem_status(icom_port); 915 } 916 if (adapter_interrupts & 0x3FFF0000) { 917 /* port 1 interrupt */ 918 icom_port = &icom_adapter->port_info[1]; 919 if (icom_port->status == ICOM_PORT_ACTIVE) { 920 port_int_reg = (u16) (adapter_interrupts >> 16); 921 process_interrupt(port_int_reg, icom_port); 922 check_modem_status(icom_port); 923 } 924 } 925 926 /* Clear out any pending interrupts */ 927 writel(adapter_interrupts, int_reg); 928 929 /* flush the write */ 930 adapter_interrupts = readl(int_reg); 931 932 return IRQ_HANDLED; 933 } 934 935 /* 936 * ------------------------------------------------------------------ 937 * Begin serial-core API 938 * ------------------------------------------------------------------ 939 */ 940 static unsigned int icom_tx_empty(struct uart_port *port) 941 { 942 int ret; 943 unsigned long flags; 944 945 spin_lock_irqsave(&port->lock, flags); 946 if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) & 947 SA_FLAGS_READY_TO_XMIT) 948 ret = TIOCSER_TEMT; 949 else 950 ret = 0; 951 952 spin_unlock_irqrestore(&port->lock, flags); 953 return ret; 954 } 955 956 static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl) 957 { 958 unsigned char local_osr; 959 960 trace(ICOM_PORT, "SET_MODEM", 0); 961 local_osr = readb(&ICOM_PORT->dram->osr); 962 963 if (mctrl & TIOCM_RTS) { 964 trace(ICOM_PORT, "RAISE_RTS", 0); 965 local_osr |= ICOM_RTS; 966 } else { 967 trace(ICOM_PORT, "LOWER_RTS", 0); 968 local_osr &= ~ICOM_RTS; 969 } 970 971 if (mctrl & TIOCM_DTR) { 972 trace(ICOM_PORT, "RAISE_DTR", 0); 973 local_osr |= ICOM_DTR; 974 } else { 975 trace(ICOM_PORT, "LOWER_DTR", 0); 976 local_osr &= ~ICOM_DTR; 977 } 978 979 writeb(local_osr, &ICOM_PORT->dram->osr); 980 } 981 982 static unsigned int icom_get_mctrl(struct uart_port *port) 983 { 984 unsigned char status; 985 unsigned int result; 986 987 trace(ICOM_PORT, "GET_MODEM", 0); 988 989 status = readb(&ICOM_PORT->dram->isr); 990 991 result = ((status & ICOM_DCD) ? TIOCM_CAR : 0) 992 | ((status & ICOM_RI) ? TIOCM_RNG : 0) 993 | ((status & ICOM_DSR) ? TIOCM_DSR : 0) 994 | ((status & ICOM_CTS) ? TIOCM_CTS : 0); 995 return result; 996 } 997 998 static void icom_stop_tx(struct uart_port *port) 999 { 1000 unsigned char cmdReg; 1001 1002 trace(ICOM_PORT, "STOP", 0); 1003 cmdReg = readb(&ICOM_PORT->dram->CmdReg); 1004 writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg); 1005 } 1006 1007 static void icom_start_tx(struct uart_port *port) 1008 { 1009 unsigned char cmdReg; 1010 1011 trace(ICOM_PORT, "START", 0); 1012 cmdReg = readb(&ICOM_PORT->dram->CmdReg); 1013 if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT) 1014 writeb(cmdReg & ~CMD_HOLD_XMIT, 1015 &ICOM_PORT->dram->CmdReg); 1016 1017 icom_write(port); 1018 } 1019 1020 static void icom_send_xchar(struct uart_port *port, char ch) 1021 { 1022 unsigned char xdata; 1023 int index; 1024 unsigned long flags; 1025 1026 trace(ICOM_PORT, "SEND_XCHAR", ch); 1027 1028 /* wait .1 sec to send char */ 1029 for (index = 0; index < 10; index++) { 1030 spin_lock_irqsave(&port->lock, flags); 1031 xdata = readb(&ICOM_PORT->dram->xchar); 1032 if (xdata == 0x00) { 1033 trace(ICOM_PORT, "QUICK_WRITE", 0); 1034 writeb(ch, &ICOM_PORT->dram->xchar); 1035 1036 /* flush write operation */ 1037 xdata = readb(&ICOM_PORT->dram->xchar); 1038 spin_unlock_irqrestore(&port->lock, flags); 1039 break; 1040 } 1041 spin_unlock_irqrestore(&port->lock, flags); 1042 msleep(10); 1043 } 1044 } 1045 1046 static void icom_stop_rx(struct uart_port *port) 1047 { 1048 unsigned char cmdReg; 1049 1050 cmdReg = readb(&ICOM_PORT->dram->CmdReg); 1051 writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg); 1052 } 1053 1054 static void icom_break(struct uart_port *port, int break_state) 1055 { 1056 unsigned char cmdReg; 1057 unsigned long flags; 1058 1059 spin_lock_irqsave(&port->lock, flags); 1060 trace(ICOM_PORT, "BREAK", 0); 1061 cmdReg = readb(&ICOM_PORT->dram->CmdReg); 1062 if (break_state == -1) { 1063 writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg); 1064 } else { 1065 writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg); 1066 } 1067 spin_unlock_irqrestore(&port->lock, flags); 1068 } 1069 1070 static int icom_open(struct uart_port *port) 1071 { 1072 int retval; 1073 1074 kref_get(&ICOM_PORT->adapter->kref); 1075 retval = startup(ICOM_PORT); 1076 1077 if (retval) { 1078 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release); 1079 trace(ICOM_PORT, "STARTUP_ERROR", 0); 1080 return retval; 1081 } 1082 1083 return 0; 1084 } 1085 1086 static void icom_close(struct uart_port *port) 1087 { 1088 unsigned char cmdReg; 1089 1090 trace(ICOM_PORT, "CLOSE", 0); 1091 1092 /* stop receiver */ 1093 cmdReg = readb(&ICOM_PORT->dram->CmdReg); 1094 writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg); 1095 1096 shutdown(ICOM_PORT); 1097 1098 kref_put(&ICOM_PORT->adapter->kref, icom_kref_release); 1099 } 1100 1101 static void icom_set_termios(struct uart_port *port, 1102 struct ktermios *termios, 1103 struct ktermios *old_termios) 1104 { 1105 int baud; 1106 unsigned cflag, iflag; 1107 char new_config2; 1108 char new_config3 = 0; 1109 char tmp_byte; 1110 int index; 1111 int rcv_buff, xmit_buff; 1112 unsigned long offset; 1113 unsigned long flags; 1114 1115 spin_lock_irqsave(&port->lock, flags); 1116 trace(ICOM_PORT, "CHANGE_SPEED", 0); 1117 1118 cflag = termios->c_cflag; 1119 iflag = termios->c_iflag; 1120 1121 new_config2 = ICOM_ACFG_DRIVE1; 1122 1123 /* byte size and parity */ 1124 switch (cflag & CSIZE) { 1125 case CS5: /* 5 bits/char */ 1126 new_config2 |= ICOM_ACFG_5BPC; 1127 break; 1128 case CS6: /* 6 bits/char */ 1129 new_config2 |= ICOM_ACFG_6BPC; 1130 break; 1131 case CS7: /* 7 bits/char */ 1132 new_config2 |= ICOM_ACFG_7BPC; 1133 break; 1134 case CS8: /* 8 bits/char */ 1135 new_config2 |= ICOM_ACFG_8BPC; 1136 break; 1137 default: 1138 break; 1139 } 1140 if (cflag & CSTOPB) { 1141 /* 2 stop bits */ 1142 new_config2 |= ICOM_ACFG_2STOP_BIT; 1143 } 1144 if (cflag & PARENB) { 1145 /* parity bit enabled */ 1146 new_config2 |= ICOM_ACFG_PARITY_ENAB; 1147 trace(ICOM_PORT, "PARENB", 0); 1148 } 1149 if (cflag & PARODD) { 1150 /* odd parity */ 1151 new_config2 |= ICOM_ACFG_PARITY_ODD; 1152 trace(ICOM_PORT, "PARODD", 0); 1153 } 1154 1155 /* Determine divisor based on baud rate */ 1156 baud = uart_get_baud_rate(port, termios, old_termios, 1157 icom_acfg_baud[0], 1158 icom_acfg_baud[BAUD_TABLE_LIMIT]); 1159 if (!baud) 1160 baud = 9600; /* B0 transition handled in rs_set_termios */ 1161 1162 for (index = 0; index < BAUD_TABLE_LIMIT; index++) { 1163 if (icom_acfg_baud[index] == baud) { 1164 new_config3 = index; 1165 break; 1166 } 1167 } 1168 1169 uart_update_timeout(port, cflag, baud); 1170 1171 /* CTS flow control flag and modem status interrupts */ 1172 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg)); 1173 if (cflag & CRTSCTS) 1174 tmp_byte |= HDLC_HDW_FLOW; 1175 else 1176 tmp_byte &= ~HDLC_HDW_FLOW; 1177 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg)); 1178 1179 /* 1180 * Set up parity check flag 1181 */ 1182 ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE; 1183 if (iflag & INPCK) 1184 ICOM_PORT->read_status_mask |= 1185 SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR; 1186 1187 if ((iflag & BRKINT) || (iflag & PARMRK)) 1188 ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET; 1189 1190 /* 1191 * Characters to ignore 1192 */ 1193 ICOM_PORT->ignore_status_mask = 0; 1194 if (iflag & IGNPAR) 1195 ICOM_PORT->ignore_status_mask |= 1196 SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR; 1197 if (iflag & IGNBRK) { 1198 ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET; 1199 /* 1200 * If we're ignore parity and break indicators, ignore 1201 * overruns too. (For real raw support). 1202 */ 1203 if (iflag & IGNPAR) 1204 ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN; 1205 } 1206 1207 /* 1208 * !!! ignore all characters if CREAD is not set 1209 */ 1210 if ((cflag & CREAD) == 0) 1211 ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE; 1212 1213 /* Turn off Receiver to prepare for reset */ 1214 writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg); 1215 1216 for (index = 0; index < 10; index++) { 1217 if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) { 1218 break; 1219 } 1220 } 1221 1222 /* clear all current buffers of data */ 1223 for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) { 1224 ICOM_PORT->statStg->rcv[rcv_buff].flags = 0; 1225 ICOM_PORT->statStg->rcv[rcv_buff].leLength = 0; 1226 ICOM_PORT->statStg->rcv[rcv_buff].WorkingLength = 1227 (unsigned short int) cpu_to_le16(RCV_BUFF_SZ); 1228 } 1229 1230 for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) { 1231 ICOM_PORT->statStg->xmit[xmit_buff].flags = 0; 1232 } 1233 1234 /* activate changes and start xmit and receiver here */ 1235 /* Enable the receiver */ 1236 writeb(new_config3, &(ICOM_PORT->dram->async_config3)); 1237 writeb(new_config2, &(ICOM_PORT->dram->async_config2)); 1238 tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg)); 1239 tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL; 1240 writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg)); 1241 writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */ 1242 writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */ 1243 1244 /* reset processor */ 1245 writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg); 1246 1247 for (index = 0; index < 10; index++) { 1248 if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) { 1249 break; 1250 } 1251 } 1252 1253 /* Enable Transmitter and Receiver */ 1254 offset = 1255 (unsigned long) &ICOM_PORT->statStg->rcv[0] - 1256 (unsigned long) ICOM_PORT->statStg; 1257 writel(ICOM_PORT->statStg_pci + offset, 1258 &ICOM_PORT->dram->RcvStatusAddr); 1259 ICOM_PORT->next_rcv = 0; 1260 ICOM_PORT->put_length = 0; 1261 *ICOM_PORT->xmitRestart = 0; 1262 writel(ICOM_PORT->xmitRestart_pci, 1263 &ICOM_PORT->dram->XmitStatusAddr); 1264 trace(ICOM_PORT, "XR_ENAB", 0); 1265 writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg); 1266 1267 spin_unlock_irqrestore(&port->lock, flags); 1268 } 1269 1270 static const char *icom_type(struct uart_port *port) 1271 { 1272 return "icom"; 1273 } 1274 1275 static void icom_release_port(struct uart_port *port) 1276 { 1277 } 1278 1279 static int icom_request_port(struct uart_port *port) 1280 { 1281 return 0; 1282 } 1283 1284 static void icom_config_port(struct uart_port *port, int flags) 1285 { 1286 port->type = PORT_ICOM; 1287 } 1288 1289 static struct uart_ops icom_ops = { 1290 .tx_empty = icom_tx_empty, 1291 .set_mctrl = icom_set_mctrl, 1292 .get_mctrl = icom_get_mctrl, 1293 .stop_tx = icom_stop_tx, 1294 .start_tx = icom_start_tx, 1295 .send_xchar = icom_send_xchar, 1296 .stop_rx = icom_stop_rx, 1297 .break_ctl = icom_break, 1298 .startup = icom_open, 1299 .shutdown = icom_close, 1300 .set_termios = icom_set_termios, 1301 .type = icom_type, 1302 .release_port = icom_release_port, 1303 .request_port = icom_request_port, 1304 .config_port = icom_config_port, 1305 }; 1306 1307 #define ICOM_CONSOLE NULL 1308 1309 static struct uart_driver icom_uart_driver = { 1310 .owner = THIS_MODULE, 1311 .driver_name = ICOM_DRIVER_NAME, 1312 .dev_name = "ttyA", 1313 .major = ICOM_MAJOR, 1314 .minor = ICOM_MINOR_START, 1315 .nr = NR_PORTS, 1316 .cons = ICOM_CONSOLE, 1317 }; 1318 1319 static int icom_init_ports(struct icom_adapter *icom_adapter) 1320 { 1321 u32 subsystem_id = icom_adapter->subsystem_id; 1322 int i; 1323 struct icom_port *icom_port; 1324 1325 if (icom_adapter->version == ADAPTER_V1) { 1326 icom_adapter->numb_ports = 2; 1327 1328 for (i = 0; i < 2; i++) { 1329 icom_port = &icom_adapter->port_info[i]; 1330 icom_port->port = i; 1331 icom_port->status = ICOM_PORT_ACTIVE; 1332 icom_port->imbed_modem = ICOM_UNKNOWN; 1333 } 1334 } else { 1335 if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) { 1336 icom_adapter->numb_ports = 4; 1337 1338 for (i = 0; i < 4; i++) { 1339 icom_port = &icom_adapter->port_info[i]; 1340 1341 icom_port->port = i; 1342 icom_port->status = ICOM_PORT_ACTIVE; 1343 icom_port->imbed_modem = ICOM_IMBED_MODEM; 1344 } 1345 } else { 1346 icom_adapter->numb_ports = 4; 1347 1348 icom_adapter->port_info[0].port = 0; 1349 icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE; 1350 1351 if (subsystem_id == 1352 PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM) { 1353 icom_adapter->port_info[0].imbed_modem = ICOM_IMBED_MODEM; 1354 } else { 1355 icom_adapter->port_info[0].imbed_modem = ICOM_RVX; 1356 } 1357 1358 icom_adapter->port_info[1].status = ICOM_PORT_OFF; 1359 1360 icom_adapter->port_info[2].port = 2; 1361 icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE; 1362 icom_adapter->port_info[2].imbed_modem = ICOM_RVX; 1363 icom_adapter->port_info[3].status = ICOM_PORT_OFF; 1364 } 1365 } 1366 1367 return 0; 1368 } 1369 1370 static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num) 1371 { 1372 if (icom_adapter->version == ADAPTER_V1) { 1373 icom_port->global_reg = icom_adapter->base_addr + 0x4000; 1374 icom_port->int_reg = icom_adapter->base_addr + 1375 0x4004 + 2 - 2 * port_num; 1376 } else { 1377 icom_port->global_reg = icom_adapter->base_addr + 0x8000; 1378 if (icom_port->port < 2) 1379 icom_port->int_reg = icom_adapter->base_addr + 1380 0x8004 + 2 - 2 * icom_port->port; 1381 else 1382 icom_port->int_reg = icom_adapter->base_addr + 1383 0x8024 + 2 - 2 * (icom_port->port - 2); 1384 } 1385 } 1386 static int icom_load_ports(struct icom_adapter *icom_adapter) 1387 { 1388 struct icom_port *icom_port; 1389 int port_num; 1390 1391 for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) { 1392 1393 icom_port = &icom_adapter->port_info[port_num]; 1394 1395 if (icom_port->status == ICOM_PORT_ACTIVE) { 1396 icom_port_active(icom_port, icom_adapter, port_num); 1397 icom_port->dram = icom_adapter->base_addr + 1398 0x2000 * icom_port->port; 1399 1400 icom_port->adapter = icom_adapter; 1401 1402 /* get port memory */ 1403 if (get_port_memory(icom_port) != 0) { 1404 dev_err(&icom_port->adapter->pci_dev->dev, 1405 "Memory allocation for port FAILED\n"); 1406 } 1407 } 1408 } 1409 return 0; 1410 } 1411 1412 static int icom_alloc_adapter(struct icom_adapter 1413 **icom_adapter_ref) 1414 { 1415 int adapter_count = 0; 1416 struct icom_adapter *icom_adapter; 1417 struct icom_adapter *cur_adapter_entry; 1418 struct list_head *tmp; 1419 1420 icom_adapter = kzalloc(sizeof(struct icom_adapter), GFP_KERNEL); 1421 1422 if (!icom_adapter) { 1423 return -ENOMEM; 1424 } 1425 1426 list_for_each(tmp, &icom_adapter_head) { 1427 cur_adapter_entry = 1428 list_entry(tmp, struct icom_adapter, 1429 icom_adapter_entry); 1430 if (cur_adapter_entry->index != adapter_count) { 1431 break; 1432 } 1433 adapter_count++; 1434 } 1435 1436 icom_adapter->index = adapter_count; 1437 list_add_tail(&icom_adapter->icom_adapter_entry, tmp); 1438 1439 *icom_adapter_ref = icom_adapter; 1440 return 0; 1441 } 1442 1443 static void icom_free_adapter(struct icom_adapter *icom_adapter) 1444 { 1445 list_del(&icom_adapter->icom_adapter_entry); 1446 kfree(icom_adapter); 1447 } 1448 1449 static void icom_remove_adapter(struct icom_adapter *icom_adapter) 1450 { 1451 struct icom_port *icom_port; 1452 int index; 1453 1454 for (index = 0; index < icom_adapter->numb_ports; index++) { 1455 icom_port = &icom_adapter->port_info[index]; 1456 1457 if (icom_port->status == ICOM_PORT_ACTIVE) { 1458 dev_info(&icom_adapter->pci_dev->dev, 1459 "Device removed\n"); 1460 1461 uart_remove_one_port(&icom_uart_driver, 1462 &icom_port->uart_port); 1463 1464 /* be sure that DTR and RTS are dropped */ 1465 writeb(0x00, &icom_port->dram->osr); 1466 1467 /* Wait 0.1 Sec for simple Init to complete */ 1468 msleep(100); 1469 1470 /* Stop proccessor */ 1471 stop_processor(icom_port); 1472 1473 free_port_memory(icom_port); 1474 } 1475 } 1476 1477 free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter); 1478 iounmap(icom_adapter->base_addr); 1479 pci_release_regions(icom_adapter->pci_dev); 1480 icom_free_adapter(icom_adapter); 1481 } 1482 1483 static void icom_kref_release(struct kref *kref) 1484 { 1485 struct icom_adapter *icom_adapter; 1486 1487 icom_adapter = to_icom_adapter(kref); 1488 icom_remove_adapter(icom_adapter); 1489 } 1490 1491 static int icom_probe(struct pci_dev *dev, 1492 const struct pci_device_id *ent) 1493 { 1494 int index; 1495 unsigned int command_reg; 1496 int retval; 1497 struct icom_adapter *icom_adapter; 1498 struct icom_port *icom_port; 1499 1500 retval = pci_enable_device(dev); 1501 if (retval) { 1502 dev_err(&dev->dev, "Device enable FAILED\n"); 1503 return retval; 1504 } 1505 1506 retval = pci_request_regions(dev, "icom"); 1507 if (retval) { 1508 dev_err(&dev->dev, "pci_request_regions FAILED\n"); 1509 pci_disable_device(dev); 1510 return retval; 1511 } 1512 1513 pci_set_master(dev); 1514 1515 retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg); 1516 if (retval) { 1517 dev_err(&dev->dev, "PCI Config read FAILED\n"); 1518 return retval; 1519 } 1520 1521 pci_write_config_dword(dev, PCI_COMMAND, 1522 command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER 1523 | PCI_COMMAND_PARITY | PCI_COMMAND_SERR); 1524 1525 if (ent->driver_data == ADAPTER_V1) { 1526 pci_write_config_dword(dev, 0x44, 0x8300830A); 1527 } else { 1528 pci_write_config_dword(dev, 0x44, 0x42004200); 1529 pci_write_config_dword(dev, 0x48, 0x42004200); 1530 } 1531 1532 1533 retval = icom_alloc_adapter(&icom_adapter); 1534 if (retval) { 1535 dev_err(&dev->dev, "icom_alloc_adapter FAILED\n"); 1536 retval = -EIO; 1537 goto probe_exit0; 1538 } 1539 1540 icom_adapter->base_addr_pci = pci_resource_start(dev, 0); 1541 icom_adapter->pci_dev = dev; 1542 icom_adapter->version = ent->driver_data; 1543 icom_adapter->subsystem_id = ent->subdevice; 1544 1545 1546 retval = icom_init_ports(icom_adapter); 1547 if (retval) { 1548 dev_err(&dev->dev, "Port configuration failed\n"); 1549 goto probe_exit1; 1550 } 1551 1552 icom_adapter->base_addr = pci_ioremap_bar(dev, 0); 1553 1554 if (!icom_adapter->base_addr) { 1555 retval = -ENOMEM; 1556 goto probe_exit1; 1557 } 1558 1559 /* save off irq and request irq line */ 1560 retval = request_irq(dev->irq, icom_interrupt, IRQF_SHARED, ICOM_DRIVER_NAME, (void *)icom_adapter); 1561 if (retval) { 1562 goto probe_exit2; 1563 } 1564 1565 retval = icom_load_ports(icom_adapter); 1566 1567 for (index = 0; index < icom_adapter->numb_ports; index++) { 1568 icom_port = &icom_adapter->port_info[index]; 1569 1570 if (icom_port->status == ICOM_PORT_ACTIVE) { 1571 icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq; 1572 icom_port->uart_port.type = PORT_ICOM; 1573 icom_port->uart_port.iotype = UPIO_MEM; 1574 icom_port->uart_port.membase = 1575 (unsigned char __iomem *)icom_adapter->base_addr_pci; 1576 icom_port->uart_port.fifosize = 16; 1577 icom_port->uart_port.ops = &icom_ops; 1578 icom_port->uart_port.line = 1579 icom_port->port + icom_adapter->index * 4; 1580 if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) { 1581 icom_port->status = ICOM_PORT_OFF; 1582 dev_err(&dev->dev, "Device add failed\n"); 1583 } else 1584 dev_info(&dev->dev, "Device added\n"); 1585 } 1586 } 1587 1588 kref_init(&icom_adapter->kref); 1589 return 0; 1590 1591 probe_exit2: 1592 iounmap(icom_adapter->base_addr); 1593 probe_exit1: 1594 icom_free_adapter(icom_adapter); 1595 1596 probe_exit0: 1597 pci_release_regions(dev); 1598 pci_disable_device(dev); 1599 1600 return retval; 1601 } 1602 1603 static void icom_remove(struct pci_dev *dev) 1604 { 1605 struct icom_adapter *icom_adapter; 1606 struct list_head *tmp; 1607 1608 list_for_each(tmp, &icom_adapter_head) { 1609 icom_adapter = list_entry(tmp, struct icom_adapter, 1610 icom_adapter_entry); 1611 if (icom_adapter->pci_dev == dev) { 1612 kref_put(&icom_adapter->kref, icom_kref_release); 1613 return; 1614 } 1615 } 1616 1617 dev_err(&dev->dev, "Unable to find device to remove\n"); 1618 } 1619 1620 static struct pci_driver icom_pci_driver = { 1621 .name = ICOM_DRIVER_NAME, 1622 .id_table = icom_pci_table, 1623 .probe = icom_probe, 1624 .remove = icom_remove, 1625 }; 1626 1627 static int __init icom_init(void) 1628 { 1629 int ret; 1630 1631 spin_lock_init(&icom_lock); 1632 1633 ret = uart_register_driver(&icom_uart_driver); 1634 if (ret) 1635 return ret; 1636 1637 ret = pci_register_driver(&icom_pci_driver); 1638 1639 if (ret < 0) 1640 uart_unregister_driver(&icom_uart_driver); 1641 1642 return ret; 1643 } 1644 1645 static void __exit icom_exit(void) 1646 { 1647 pci_unregister_driver(&icom_pci_driver); 1648 uart_unregister_driver(&icom_uart_driver); 1649 } 1650 1651 module_init(icom_init); 1652 module_exit(icom_exit); 1653 1654 MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>"); 1655 MODULE_DESCRIPTION("IBM iSeries Serial IOA driver"); 1656 MODULE_SUPPORTED_DEVICE 1657 ("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters"); 1658 MODULE_LICENSE("GPL"); 1659 MODULE_FIRMWARE("icom_call_setup.bin"); 1660 MODULE_FIRMWARE("icom_res_dce.bin"); 1661 MODULE_FIRMWARE("icom_asc.bin"); 1662