1/* 2 * NinjaSCSI-32Bi Cardbus, NinjaSCSI-32UDE PCI/CardBus SCSI driver 3 * Copyright (C) 2001, 2002, 2003 4 * YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp> 5 * GOTO Masanori <gotom@debian.or.jp>, <gotom@debian.org> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * 18 * Revision History: 19 * 1.0: Initial Release. 20 * 1.1: Add /proc SDTR status. 21 * Remove obsolete error handler nsp32_reset. 22 * Some clean up. 23 * 1.2: PowerPC (big endian) support. 24 */ 25 26#include <linux/module.h> 27#include <linux/init.h> 28#include <linux/kernel.h> 29#include <linux/string.h> 30#include <linux/timer.h> 31#include <linux/ioport.h> 32#include <linux/major.h> 33#include <linux/blkdev.h> 34#include <linux/interrupt.h> 35#include <linux/pci.h> 36#include <linux/delay.h> 37#include <linux/ctype.h> 38#include <linux/dma-mapping.h> 39 40#include <asm/dma.h> 41#include <asm/io.h> 42 43#include <scsi/scsi.h> 44#include <scsi/scsi_cmnd.h> 45#include <scsi/scsi_device.h> 46#include <scsi/scsi_host.h> 47#include <scsi/scsi_ioctl.h> 48 49#include "nsp32.h" 50 51 52/*********************************************************************** 53 * Module parameters 54 */ 55static int trans_mode = 0; /* default: BIOS */ 56module_param (trans_mode, int, 0); 57MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M"); 58#define ASYNC_MODE 1 59#define ULTRA20M_MODE 2 60 61static bool auto_param = 0; /* default: ON */ 62module_param (auto_param, bool, 0); 63MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)"); 64 65static bool disc_priv = 1; /* default: OFF */ 66module_param (disc_priv, bool, 0); 67MODULE_PARM_DESC(disc_priv, "disconnection privilege mode (0: ON 1: OFF(default))"); 68 69MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>"); 70MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module"); 71MODULE_LICENSE("GPL"); 72 73static const char *nsp32_release_version = "1.2"; 74 75 76/**************************************************************************** 77 * Supported hardware 78 */ 79static struct pci_device_id nsp32_pci_table[] = { 80 { 81 .vendor = PCI_VENDOR_ID_IODATA, 82 .device = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II, 83 .subvendor = PCI_ANY_ID, 84 .subdevice = PCI_ANY_ID, 85 .driver_data = MODEL_IODATA, 86 }, 87 { 88 .vendor = PCI_VENDOR_ID_WORKBIT, 89 .device = PCI_DEVICE_ID_NINJASCSI_32BI_KME, 90 .subvendor = PCI_ANY_ID, 91 .subdevice = PCI_ANY_ID, 92 .driver_data = MODEL_KME, 93 }, 94 { 95 .vendor = PCI_VENDOR_ID_WORKBIT, 96 .device = PCI_DEVICE_ID_NINJASCSI_32BI_WBT, 97 .subvendor = PCI_ANY_ID, 98 .subdevice = PCI_ANY_ID, 99 .driver_data = MODEL_WORKBIT, 100 }, 101 { 102 .vendor = PCI_VENDOR_ID_WORKBIT, 103 .device = PCI_DEVICE_ID_WORKBIT_STANDARD, 104 .subvendor = PCI_ANY_ID, 105 .subdevice = PCI_ANY_ID, 106 .driver_data = MODEL_PCI_WORKBIT, 107 }, 108 { 109 .vendor = PCI_VENDOR_ID_WORKBIT, 110 .device = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC, 111 .subvendor = PCI_ANY_ID, 112 .subdevice = PCI_ANY_ID, 113 .driver_data = MODEL_LOGITEC, 114 }, 115 { 116 .vendor = PCI_VENDOR_ID_WORKBIT, 117 .device = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC, 118 .subvendor = PCI_ANY_ID, 119 .subdevice = PCI_ANY_ID, 120 .driver_data = MODEL_PCI_LOGITEC, 121 }, 122 { 123 .vendor = PCI_VENDOR_ID_WORKBIT, 124 .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO, 125 .subvendor = PCI_ANY_ID, 126 .subdevice = PCI_ANY_ID, 127 .driver_data = MODEL_PCI_MELCO, 128 }, 129 { 130 .vendor = PCI_VENDOR_ID_WORKBIT, 131 .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II, 132 .subvendor = PCI_ANY_ID, 133 .subdevice = PCI_ANY_ID, 134 .driver_data = MODEL_PCI_MELCO, 135 }, 136 {0,0,}, 137}; 138MODULE_DEVICE_TABLE(pci, nsp32_pci_table); 139 140static nsp32_hw_data nsp32_data_base; /* probe <-> detect glue */ 141 142 143/* 144 * Period/AckWidth speed conversion table 145 * 146 * Note: This period/ackwidth speed table must be in descending order. 147 */ 148static nsp32_sync_table nsp32_sync_table_40M[] = { 149 /* {PNo, AW, SP, EP, SREQ smpl} Speed(MB/s) Period AckWidth */ 150 {0x1, 0, 0x0c, 0x0c, SMPL_40M}, /* 20.0 : 50ns, 25ns */ 151 {0x2, 0, 0x0d, 0x18, SMPL_40M}, /* 13.3 : 75ns, 25ns */ 152 {0x3, 1, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */ 153 {0x4, 1, 0x1a, 0x1f, SMPL_20M}, /* 8.0 : 125ns, 50ns */ 154 {0x5, 2, 0x20, 0x25, SMPL_20M}, /* 6.7 : 150ns, 75ns */ 155 {0x6, 2, 0x26, 0x31, SMPL_20M}, /* 5.7 : 175ns, 75ns */ 156 {0x7, 3, 0x32, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */ 157 {0x8, 3, 0x33, 0x38, SMPL_10M}, /* 4.4 : 225ns, 100ns */ 158 {0x9, 3, 0x39, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */ 159}; 160 161static nsp32_sync_table nsp32_sync_table_20M[] = { 162 {0x1, 0, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */ 163 {0x2, 0, 0x1a, 0x25, SMPL_20M}, /* 6.7 : 150ns, 50ns */ 164 {0x3, 1, 0x26, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */ 165 {0x4, 1, 0x33, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */ 166 {0x5, 2, 0x3f, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 150ns */ 167 {0x6, 2, 0x4c, 0x57, SMPL_10M}, /* 2.8 : 350ns, 150ns */ 168 {0x7, 3, 0x58, 0x64, SMPL_10M}, /* 2.5 : 400ns, 200ns */ 169 {0x8, 3, 0x65, 0x70, SMPL_10M}, /* 2.2 : 450ns, 200ns */ 170 {0x9, 3, 0x71, 0x7d, SMPL_10M}, /* 2.0 : 500ns, 200ns */ 171}; 172 173static nsp32_sync_table nsp32_sync_table_pci[] = { 174 {0x1, 0, 0x0c, 0x0f, SMPL_40M}, /* 16.6 : 60ns, 30ns */ 175 {0x2, 0, 0x10, 0x16, SMPL_40M}, /* 11.1 : 90ns, 30ns */ 176 {0x3, 1, 0x17, 0x1e, SMPL_20M}, /* 8.3 : 120ns, 60ns */ 177 {0x4, 1, 0x1f, 0x25, SMPL_20M}, /* 6.7 : 150ns, 60ns */ 178 {0x5, 2, 0x26, 0x2d, SMPL_20M}, /* 5.6 : 180ns, 90ns */ 179 {0x6, 2, 0x2e, 0x34, SMPL_10M}, /* 4.8 : 210ns, 90ns */ 180 {0x7, 3, 0x35, 0x3c, SMPL_10M}, /* 4.2 : 240ns, 120ns */ 181 {0x8, 3, 0x3d, 0x43, SMPL_10M}, /* 3.7 : 270ns, 120ns */ 182 {0x9, 3, 0x44, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 120ns */ 183}; 184 185/* 186 * function declaration 187 */ 188/* module entry point */ 189static int nsp32_probe (struct pci_dev *, const struct pci_device_id *); 190static void nsp32_remove(struct pci_dev *); 191static int __init init_nsp32 (void); 192static void __exit exit_nsp32 (void); 193 194/* struct struct scsi_host_template */ 195static int nsp32_show_info (struct seq_file *, struct Scsi_Host *); 196 197static int nsp32_detect (struct pci_dev *pdev); 198static int nsp32_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); 199static const char *nsp32_info (struct Scsi_Host *); 200static int nsp32_release (struct Scsi_Host *); 201 202/* SCSI error handler */ 203static int nsp32_eh_abort (struct scsi_cmnd *); 204static int nsp32_eh_bus_reset (struct scsi_cmnd *); 205static int nsp32_eh_host_reset(struct scsi_cmnd *); 206 207/* generate SCSI message */ 208static void nsp32_build_identify(struct scsi_cmnd *); 209static void nsp32_build_nop (struct scsi_cmnd *); 210static void nsp32_build_reject (struct scsi_cmnd *); 211static void nsp32_build_sdtr (struct scsi_cmnd *, unsigned char, unsigned char); 212 213/* SCSI message handler */ 214static int nsp32_busfree_occur(struct scsi_cmnd *, unsigned short); 215static void nsp32_msgout_occur (struct scsi_cmnd *); 216static void nsp32_msgin_occur (struct scsi_cmnd *, unsigned long, unsigned short); 217 218static int nsp32_setup_sg_table (struct scsi_cmnd *); 219static int nsp32_selection_autopara(struct scsi_cmnd *); 220static int nsp32_selection_autoscsi(struct scsi_cmnd *); 221static void nsp32_scsi_done (struct scsi_cmnd *); 222static int nsp32_arbitration (struct scsi_cmnd *, unsigned int); 223static int nsp32_reselection (struct scsi_cmnd *, unsigned char); 224static void nsp32_adjust_busfree (struct scsi_cmnd *, unsigned int); 225static void nsp32_restart_autoscsi (struct scsi_cmnd *, unsigned short); 226 227/* SCSI SDTR */ 228static void nsp32_analyze_sdtr (struct scsi_cmnd *); 229static int nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char); 230static void nsp32_set_async (nsp32_hw_data *, nsp32_target *); 231static void nsp32_set_max_sync (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *); 232static void nsp32_set_sync_entry (nsp32_hw_data *, nsp32_target *, int, unsigned char); 233 234/* SCSI bus status handler */ 235static void nsp32_wait_req (nsp32_hw_data *, int); 236static void nsp32_wait_sack (nsp32_hw_data *, int); 237static void nsp32_sack_assert (nsp32_hw_data *); 238static void nsp32_sack_negate (nsp32_hw_data *); 239static void nsp32_do_bus_reset(nsp32_hw_data *); 240 241/* hardware interrupt handler */ 242static irqreturn_t do_nsp32_isr(int, void *); 243 244/* initialize hardware */ 245static int nsp32hw_init(nsp32_hw_data *); 246 247/* EEPROM handler */ 248static int nsp32_getprom_param (nsp32_hw_data *); 249static int nsp32_getprom_at24 (nsp32_hw_data *); 250static int nsp32_getprom_c16 (nsp32_hw_data *); 251static void nsp32_prom_start (nsp32_hw_data *); 252static void nsp32_prom_stop (nsp32_hw_data *); 253static int nsp32_prom_read (nsp32_hw_data *, int); 254static int nsp32_prom_read_bit (nsp32_hw_data *); 255static void nsp32_prom_write_bit(nsp32_hw_data *, int); 256static void nsp32_prom_set (nsp32_hw_data *, int, int); 257static int nsp32_prom_get (nsp32_hw_data *, int); 258 259/* debug/warning/info message */ 260static void nsp32_message (const char *, int, char *, char *, ...); 261#ifdef NSP32_DEBUG 262static void nsp32_dmessage(const char *, int, int, char *, ...); 263#endif 264 265/* 266 * max_sectors is currently limited up to 128. 267 */ 268static struct scsi_host_template nsp32_template = { 269 .proc_name = "nsp32", 270 .name = "Workbit NinjaSCSI-32Bi/UDE", 271 .show_info = nsp32_show_info, 272 .info = nsp32_info, 273 .queuecommand = nsp32_queuecommand, 274 .can_queue = 1, 275 .sg_tablesize = NSP32_SG_SIZE, 276 .max_sectors = 128, 277 .this_id = NSP32_HOST_SCSIID, 278 .use_clustering = DISABLE_CLUSTERING, 279 .eh_abort_handler = nsp32_eh_abort, 280 .eh_bus_reset_handler = nsp32_eh_bus_reset, 281 .eh_host_reset_handler = nsp32_eh_host_reset, 282/* .highmem_io = 1, */ 283}; 284 285#include "nsp32_io.h" 286 287/*********************************************************************** 288 * debug, error print 289 */ 290#ifndef NSP32_DEBUG 291# define NSP32_DEBUG_MASK 0x000000 292# define nsp32_msg(type, args...) nsp32_message ("", 0, (type), args) 293# define nsp32_dbg(mask, args...) /* */ 294#else 295# define NSP32_DEBUG_MASK 0xffffff 296# define nsp32_msg(type, args...) \ 297 nsp32_message (__func__, __LINE__, (type), args) 298# define nsp32_dbg(mask, args...) \ 299 nsp32_dmessage(__func__, __LINE__, (mask), args) 300#endif 301 302#define NSP32_DEBUG_QUEUECOMMAND BIT(0) 303#define NSP32_DEBUG_REGISTER BIT(1) 304#define NSP32_DEBUG_AUTOSCSI BIT(2) 305#define NSP32_DEBUG_INTR BIT(3) 306#define NSP32_DEBUG_SGLIST BIT(4) 307#define NSP32_DEBUG_BUSFREE BIT(5) 308#define NSP32_DEBUG_CDB_CONTENTS BIT(6) 309#define NSP32_DEBUG_RESELECTION BIT(7) 310#define NSP32_DEBUG_MSGINOCCUR BIT(8) 311#define NSP32_DEBUG_EEPROM BIT(9) 312#define NSP32_DEBUG_MSGOUTOCCUR BIT(10) 313#define NSP32_DEBUG_BUSRESET BIT(11) 314#define NSP32_DEBUG_RESTART BIT(12) 315#define NSP32_DEBUG_SYNC BIT(13) 316#define NSP32_DEBUG_WAIT BIT(14) 317#define NSP32_DEBUG_TARGETFLAG BIT(15) 318#define NSP32_DEBUG_PROC BIT(16) 319#define NSP32_DEBUG_INIT BIT(17) 320#define NSP32_SPECIAL_PRINT_REGISTER BIT(20) 321 322#define NSP32_DEBUG_BUF_LEN 100 323 324static void nsp32_message(const char *func, int line, char *type, char *fmt, ...) 325{ 326 va_list args; 327 char buf[NSP32_DEBUG_BUF_LEN]; 328 329 va_start(args, fmt); 330 vsnprintf(buf, sizeof(buf), fmt, args); 331 va_end(args); 332 333#ifndef NSP32_DEBUG 334 printk("%snsp32: %s\n", type, buf); 335#else 336 printk("%snsp32: %s (%d): %s\n", type, func, line, buf); 337#endif 338} 339 340#ifdef NSP32_DEBUG 341static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...) 342{ 343 va_list args; 344 char buf[NSP32_DEBUG_BUF_LEN]; 345 346 va_start(args, fmt); 347 vsnprintf(buf, sizeof(buf), fmt, args); 348 va_end(args); 349 350 if (mask & NSP32_DEBUG_MASK) { 351 printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf); 352 } 353} 354#endif 355 356#ifdef NSP32_DEBUG 357# include "nsp32_debug.c" 358#else 359# define show_command(arg) /* */ 360# define show_busphase(arg) /* */ 361# define show_autophase(arg) /* */ 362#endif 363 364/* 365 * IDENTIFY Message 366 */ 367static void nsp32_build_identify(struct scsi_cmnd *SCpnt) 368{ 369 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 370 int pos = data->msgout_len; 371 int mode = FALSE; 372 373 /* XXX: Auto DiscPriv detection is progressing... */ 374 if (disc_priv == 0) { 375 /* mode = TRUE; */ 376 } 377 378 data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++; 379 380 data->msgout_len = pos; 381} 382 383/* 384 * SDTR Message Routine 385 */ 386static void nsp32_build_sdtr(struct scsi_cmnd *SCpnt, 387 unsigned char period, 388 unsigned char offset) 389{ 390 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 391 int pos = data->msgout_len; 392 393 data->msgoutbuf[pos] = EXTENDED_MESSAGE; pos++; 394 data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++; 395 data->msgoutbuf[pos] = EXTENDED_SDTR; pos++; 396 data->msgoutbuf[pos] = period; pos++; 397 data->msgoutbuf[pos] = offset; pos++; 398 399 data->msgout_len = pos; 400} 401 402/* 403 * No Operation Message 404 */ 405static void nsp32_build_nop(struct scsi_cmnd *SCpnt) 406{ 407 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 408 int pos = data->msgout_len; 409 410 if (pos != 0) { 411 nsp32_msg(KERN_WARNING, 412 "Some messages are already contained!"); 413 return; 414 } 415 416 data->msgoutbuf[pos] = NOP; pos++; 417 data->msgout_len = pos; 418} 419 420/* 421 * Reject Message 422 */ 423static void nsp32_build_reject(struct scsi_cmnd *SCpnt) 424{ 425 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 426 int pos = data->msgout_len; 427 428 data->msgoutbuf[pos] = MESSAGE_REJECT; pos++; 429 data->msgout_len = pos; 430} 431 432/* 433 * timer 434 */ 435#if 0 436static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time) 437{ 438 unsigned int base = SCpnt->host->io_port; 439 440 nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time); 441 442 if (time & (~TIMER_CNT_MASK)) { 443 nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow"); 444 } 445 446 nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK); 447} 448#endif 449 450 451/* 452 * set SCSI command and other parameter to asic, and start selection phase 453 */ 454static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt) 455{ 456 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 457 unsigned int base = SCpnt->device->host->io_port; 458 unsigned int host_id = SCpnt->device->host->this_id; 459 unsigned char target = scmd_id(SCpnt); 460 nsp32_autoparam *param = data->autoparam; 461 unsigned char phase; 462 int i, ret; 463 unsigned int msgout; 464 u16_le s; 465 466 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in"); 467 468 /* 469 * check bus free 470 */ 471 phase = nsp32_read1(base, SCSI_BUS_MONITOR); 472 if (phase != BUSMON_BUS_FREE) { 473 nsp32_msg(KERN_WARNING, "bus busy"); 474 show_busphase(phase & BUSMON_PHASE_MASK); 475 SCpnt->result = DID_BUS_BUSY << 16; 476 return FALSE; 477 } 478 479 /* 480 * message out 481 * 482 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout. 483 * over 3 messages needs another routine. 484 */ 485 if (data->msgout_len == 0) { 486 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!"); 487 SCpnt->result = DID_ERROR << 16; 488 return FALSE; 489 } else if (data->msgout_len > 0 && data->msgout_len <= 3) { 490 msgout = 0; 491 for (i = 0; i < data->msgout_len; i++) { 492 /* 493 * the sending order of the message is: 494 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2 495 * MCNT 2: MSG#1 -> MSG#2 496 * MCNT 1: MSG#2 497 */ 498 msgout >>= 8; 499 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24); 500 } 501 msgout |= MV_VALID; /* MV valid */ 502 msgout |= (unsigned int)data->msgout_len; /* len */ 503 } else { 504 /* data->msgout_len > 3 */ 505 msgout = 0; 506 } 507 508 // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT)); 509 // nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME); 510 511 /* 512 * setup asic parameter 513 */ 514 memset(param, 0, sizeof(nsp32_autoparam)); 515 516 /* cdb */ 517 for (i = 0; i < SCpnt->cmd_len; i++) { 518 param->cdb[4 * i] = SCpnt->cmnd[i]; 519 } 520 521 /* outgoing messages */ 522 param->msgout = cpu_to_le32(msgout); 523 524 /* syncreg, ackwidth, target id, SREQ sampling rate */ 525 param->syncreg = data->cur_target->syncreg; 526 param->ackwidth = data->cur_target->ackwidth; 527 param->target_id = BIT(host_id) | BIT(target); 528 param->sample_reg = data->cur_target->sample_reg; 529 530 // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg); 531 532 /* command control */ 533 param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER | 534 AUTOSCSI_START | 535 AUTO_MSGIN_00_OR_04 | 536 AUTO_MSGIN_02 | 537 AUTO_ATN ); 538 539 540 /* transfer control */ 541 s = 0; 542 switch (data->trans_method) { 543 case NSP32_TRANSFER_BUSMASTER: 544 s |= BM_START; 545 break; 546 case NSP32_TRANSFER_MMIO: 547 s |= CB_MMIO_MODE; 548 break; 549 case NSP32_TRANSFER_PIO: 550 s |= CB_IO_MODE; 551 break; 552 default: 553 nsp32_msg(KERN_ERR, "unknown trans_method"); 554 break; 555 } 556 /* 557 * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits. 558 * For bus master transfer, it's taken off. 559 */ 560 s |= (TRANSFER_GO | ALL_COUNTER_CLR); 561 param->transfer_control = cpu_to_le16(s); 562 563 /* sg table addr */ 564 param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr); 565 566 /* 567 * transfer parameter to ASIC 568 */ 569 nsp32_write4(base, SGT_ADR, data->auto_paddr); 570 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER | 571 AUTO_PARAMETER ); 572 573 /* 574 * Check arbitration 575 */ 576 ret = nsp32_arbitration(SCpnt, base); 577 578 return ret; 579} 580 581 582/* 583 * Selection with AUTO SCSI (without AUTO PARAMETER) 584 */ 585static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt) 586{ 587 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 588 unsigned int base = SCpnt->device->host->io_port; 589 unsigned int host_id = SCpnt->device->host->this_id; 590 unsigned char target = scmd_id(SCpnt); 591 unsigned char phase; 592 int status; 593 unsigned short command = 0; 594 unsigned int msgout = 0; 595 unsigned short execph; 596 int i; 597 598 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in"); 599 600 /* 601 * IRQ disable 602 */ 603 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 604 605 /* 606 * check bus line 607 */ 608 phase = nsp32_read1(base, SCSI_BUS_MONITOR); 609 if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) { 610 nsp32_msg(KERN_WARNING, "bus busy"); 611 SCpnt->result = DID_BUS_BUSY << 16; 612 status = 1; 613 goto out; 614 } 615 616 /* 617 * clear execph 618 */ 619 execph = nsp32_read2(base, SCSI_EXECUTE_PHASE); 620 621 /* 622 * clear FIFO counter to set CDBs 623 */ 624 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER); 625 626 /* 627 * set CDB0 - CDB15 628 */ 629 for (i = 0; i < SCpnt->cmd_len; i++) { 630 nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]); 631 } 632 nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]); 633 634 /* 635 * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID 636 */ 637 nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target)); 638 639 /* 640 * set SCSI MSGOUT REG 641 * 642 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout. 643 * over 3 messages needs another routine. 644 */ 645 if (data->msgout_len == 0) { 646 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!"); 647 SCpnt->result = DID_ERROR << 16; 648 status = 1; 649 goto out; 650 } else if (data->msgout_len > 0 && data->msgout_len <= 3) { 651 msgout = 0; 652 for (i = 0; i < data->msgout_len; i++) { 653 /* 654 * the sending order of the message is: 655 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2 656 * MCNT 2: MSG#1 -> MSG#2 657 * MCNT 1: MSG#2 658 */ 659 msgout >>= 8; 660 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24); 661 } 662 msgout |= MV_VALID; /* MV valid */ 663 msgout |= (unsigned int)data->msgout_len; /* len */ 664 nsp32_write4(base, SCSI_MSG_OUT, msgout); 665 } else { 666 /* data->msgout_len > 3 */ 667 nsp32_write4(base, SCSI_MSG_OUT, 0); 668 } 669 670 /* 671 * set selection timeout(= 250ms) 672 */ 673 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME); 674 675 /* 676 * set SREQ hazard killer sampling rate 677 * 678 * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz. 679 * check other internal clock! 680 */ 681 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg); 682 683 /* 684 * clear Arbit 685 */ 686 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR); 687 688 /* 689 * set SYNCREG 690 * Don't set BM_START_ADR before setting this register. 691 */ 692 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg); 693 694 /* 695 * set ACKWIDTH 696 */ 697 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth); 698 699 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, 700 "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x", 701 nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH), 702 nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID)); 703 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x", 704 data->msgout_len, msgout); 705 706 /* 707 * set SGT ADDR (physical address) 708 */ 709 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr); 710 711 /* 712 * set TRANSFER CONTROL REG 713 */ 714 command = 0; 715 command |= (TRANSFER_GO | ALL_COUNTER_CLR); 716 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 717 if (scsi_bufflen(SCpnt) > 0) { 718 command |= BM_START; 719 } 720 } else if (data->trans_method & NSP32_TRANSFER_MMIO) { 721 command |= CB_MMIO_MODE; 722 } else if (data->trans_method & NSP32_TRANSFER_PIO) { 723 command |= CB_IO_MODE; 724 } 725 nsp32_write2(base, TRANSFER_CONTROL, command); 726 727 /* 728 * start AUTO SCSI, kick off arbitration 729 */ 730 command = (CLEAR_CDB_FIFO_POINTER | 731 AUTOSCSI_START | 732 AUTO_MSGIN_00_OR_04 | 733 AUTO_MSGIN_02 | 734 AUTO_ATN ); 735 nsp32_write2(base, COMMAND_CONTROL, command); 736 737 /* 738 * Check arbitration 739 */ 740 status = nsp32_arbitration(SCpnt, base); 741 742 out: 743 /* 744 * IRQ enable 745 */ 746 nsp32_write2(base, IRQ_CONTROL, 0); 747 748 return status; 749} 750 751 752/* 753 * Arbitration Status Check 754 * 755 * Note: Arbitration counter is waited during ARBIT_GO is not lifting. 756 * Using udelay(1) consumes CPU time and system time, but 757 * arbitration delay time is defined minimal 2.4us in SCSI 758 * specification, thus udelay works as coarse grained wait timer. 759 */ 760static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base) 761{ 762 unsigned char arbit; 763 int status = TRUE; 764 int time = 0; 765 766 do { 767 arbit = nsp32_read1(base, ARBIT_STATUS); 768 time++; 769 } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 && 770 (time <= ARBIT_TIMEOUT_TIME)); 771 772 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, 773 "arbit: 0x%x, delay time: %d", arbit, time); 774 775 if (arbit & ARBIT_WIN) { 776 /* Arbitration succeeded */ 777 SCpnt->result = DID_OK << 16; 778 nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */ 779 } else if (arbit & ARBIT_FAIL) { 780 /* Arbitration failed */ 781 SCpnt->result = DID_BUS_BUSY << 16; 782 status = FALSE; 783 } else { 784 /* 785 * unknown error or ARBIT_GO timeout, 786 * something lock up! guess no connection. 787 */ 788 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout"); 789 SCpnt->result = DID_NO_CONNECT << 16; 790 status = FALSE; 791 } 792 793 /* 794 * clear Arbit 795 */ 796 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR); 797 798 return status; 799} 800 801 802/* 803 * reselection 804 * 805 * Note: This reselection routine is called from msgin_occur, 806 * reselection target id&lun must be already set. 807 * SCSI-2 says IDENTIFY implies RESTORE_POINTER operation. 808 */ 809static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun) 810{ 811 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 812 unsigned int host_id = SCpnt->device->host->this_id; 813 unsigned int base = SCpnt->device->host->io_port; 814 unsigned char tmpid, newid; 815 816 nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter"); 817 818 /* 819 * calculate reselected SCSI ID 820 */ 821 tmpid = nsp32_read1(base, RESELECT_ID); 822 tmpid &= (~BIT(host_id)); 823 newid = 0; 824 while (tmpid) { 825 if (tmpid & 1) { 826 break; 827 } 828 tmpid >>= 1; 829 newid++; 830 } 831 832 /* 833 * If reselected New ID:LUN is not existed 834 * or current nexus is not existed, unexpected 835 * reselection is occurred. Send reject message. 836 */ 837 if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) { 838 nsp32_msg(KERN_WARNING, "unknown id/lun"); 839 return FALSE; 840 } else if(data->lunt[newid][newlun].SCpnt == NULL) { 841 nsp32_msg(KERN_WARNING, "no SCSI command is processing"); 842 return FALSE; 843 } 844 845 data->cur_id = newid; 846 data->cur_lun = newlun; 847 data->cur_target = &(data->target[newid]); 848 data->cur_lunt = &(data->lunt[newid][newlun]); 849 850 /* reset SACK/SavedACK counter (or ALL clear?) */ 851 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 852 853 return TRUE; 854} 855 856 857/* 858 * nsp32_setup_sg_table - build scatter gather list for transfer data 859 * with bus master. 860 * 861 * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time. 862 */ 863static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt) 864{ 865 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 866 struct scatterlist *sg; 867 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt; 868 int num, i; 869 u32_le l; 870 871 if (sgt == NULL) { 872 nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null"); 873 return FALSE; 874 } 875 876 num = scsi_dma_map(SCpnt); 877 if (!num) 878 return TRUE; 879 else if (num < 0) 880 return FALSE; 881 else { 882 scsi_for_each_sg(SCpnt, sg, num, i) { 883 /* 884 * Build nsp32_sglist, substitute sg dma addresses. 885 */ 886 sgt[i].addr = cpu_to_le32(sg_dma_address(sg)); 887 sgt[i].len = cpu_to_le32(sg_dma_len(sg)); 888 889 if (le32_to_cpu(sgt[i].len) > 0x10000) { 890 nsp32_msg(KERN_ERR, 891 "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len)); 892 return FALSE; 893 } 894 nsp32_dbg(NSP32_DEBUG_SGLIST, 895 "num 0x%x : addr 0x%lx len 0x%lx", 896 i, 897 le32_to_cpu(sgt[i].addr), 898 le32_to_cpu(sgt[i].len )); 899 } 900 901 /* set end mark */ 902 l = le32_to_cpu(sgt[num-1].len); 903 sgt[num-1].len = cpu_to_le32(l | SGTEND); 904 } 905 906 return TRUE; 907} 908 909static int nsp32_queuecommand_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) 910{ 911 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 912 nsp32_target *target; 913 nsp32_lunt *cur_lunt; 914 int ret; 915 916 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 917 "enter. target: 0x%x LUN: 0x%llx cmnd: 0x%x cmndlen: 0x%x " 918 "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x", 919 SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len, 920 scsi_sg_count(SCpnt), scsi_sglist(SCpnt), scsi_bufflen(SCpnt)); 921 922 if (data->CurrentSC != NULL) { 923 nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request"); 924 data->CurrentSC = NULL; 925 SCpnt->result = DID_NO_CONNECT << 16; 926 done(SCpnt); 927 return 0; 928 } 929 930 /* check target ID is not same as this initiator ID */ 931 if (scmd_id(SCpnt) == SCpnt->device->host->this_id) { 932 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "target==host???"); 933 SCpnt->result = DID_BAD_TARGET << 16; 934 done(SCpnt); 935 return 0; 936 } 937 938 /* check target LUN is allowable value */ 939 if (SCpnt->device->lun >= MAX_LUN) { 940 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun"); 941 SCpnt->result = DID_BAD_TARGET << 16; 942 done(SCpnt); 943 return 0; 944 } 945 946 show_command(SCpnt); 947 948 SCpnt->scsi_done = done; 949 data->CurrentSC = SCpnt; 950 SCpnt->SCp.Status = CHECK_CONDITION; 951 SCpnt->SCp.Message = 0; 952 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); 953 954 SCpnt->SCp.ptr = (char *)scsi_sglist(SCpnt); 955 SCpnt->SCp.this_residual = scsi_bufflen(SCpnt); 956 SCpnt->SCp.buffer = NULL; 957 SCpnt->SCp.buffers_residual = 0; 958 959 /* initialize data */ 960 data->msgout_len = 0; 961 data->msgin_len = 0; 962 cur_lunt = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]); 963 cur_lunt->SCpnt = SCpnt; 964 cur_lunt->save_datp = 0; 965 cur_lunt->msgin03 = FALSE; 966 data->cur_lunt = cur_lunt; 967 data->cur_id = SCpnt->device->id; 968 data->cur_lun = SCpnt->device->lun; 969 970 ret = nsp32_setup_sg_table(SCpnt); 971 if (ret == FALSE) { 972 nsp32_msg(KERN_ERR, "SGT fail"); 973 SCpnt->result = DID_ERROR << 16; 974 nsp32_scsi_done(SCpnt); 975 return 0; 976 } 977 978 /* Build IDENTIFY */ 979 nsp32_build_identify(SCpnt); 980 981 /* 982 * If target is the first time to transfer after the reset 983 * (target don't have SDTR_DONE and SDTR_INITIATOR), sync 984 * message SDTR is needed to do synchronous transfer. 985 */ 986 target = &data->target[scmd_id(SCpnt)]; 987 data->cur_target = target; 988 989 if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) { 990 unsigned char period, offset; 991 992 if (trans_mode != ASYNC_MODE) { 993 nsp32_set_max_sync(data, target, &period, &offset); 994 nsp32_build_sdtr(SCpnt, period, offset); 995 target->sync_flag |= SDTR_INITIATOR; 996 } else { 997 nsp32_set_async(data, target); 998 target->sync_flag |= SDTR_DONE; 999 } 1000 1001 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 1002 "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n", 1003 target->limit_entry, period, offset); 1004 } else if (target->sync_flag & SDTR_INITIATOR) { 1005 /* 1006 * It was negotiating SDTR with target, sending from the 1007 * initiator, but there are no chance to remove this flag. 1008 * Set async because we don't get proper negotiation. 1009 */ 1010 nsp32_set_async(data, target); 1011 target->sync_flag &= ~SDTR_INITIATOR; 1012 target->sync_flag |= SDTR_DONE; 1013 1014 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 1015 "SDTR_INITIATOR: fall back to async"); 1016 } else if (target->sync_flag & SDTR_TARGET) { 1017 /* 1018 * It was negotiating SDTR with target, sending from target, 1019 * but there are no chance to remove this flag. Set async 1020 * because we don't get proper negotiation. 1021 */ 1022 nsp32_set_async(data, target); 1023 target->sync_flag &= ~SDTR_TARGET; 1024 target->sync_flag |= SDTR_DONE; 1025 1026 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 1027 "Unknown SDTR from target is reached, fall back to async."); 1028 } 1029 1030 nsp32_dbg(NSP32_DEBUG_TARGETFLAG, 1031 "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x", 1032 SCpnt->device->id, target->sync_flag, target->syncreg, 1033 target->ackwidth); 1034 1035 /* Selection */ 1036 if (auto_param == 0) { 1037 ret = nsp32_selection_autopara(SCpnt); 1038 } else { 1039 ret = nsp32_selection_autoscsi(SCpnt); 1040 } 1041 1042 if (ret != TRUE) { 1043 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail"); 1044 nsp32_scsi_done(SCpnt); 1045 } 1046 1047 return 0; 1048} 1049 1050static DEF_SCSI_QCMD(nsp32_queuecommand) 1051 1052/* initialize asic */ 1053static int nsp32hw_init(nsp32_hw_data *data) 1054{ 1055 unsigned int base = data->BaseAddress; 1056 unsigned short irq_stat; 1057 unsigned long lc_reg; 1058 unsigned char power; 1059 1060 lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE); 1061 if ((lc_reg & 0xff00) == 0) { 1062 lc_reg |= (0x20 << 8); 1063 nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff); 1064 } 1065 1066 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 1067 nsp32_write2(base, TRANSFER_CONTROL, 0); 1068 nsp32_write4(base, BM_CNT, 0); 1069 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0); 1070 1071 do { 1072 irq_stat = nsp32_read2(base, IRQ_STATUS); 1073 nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat); 1074 } while (irq_stat & IRQSTATUS_ANY_IRQ); 1075 1076 /* 1077 * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is 1078 * designated by specification. 1079 */ 1080 if ((data->trans_method & NSP32_TRANSFER_PIO) || 1081 (data->trans_method & NSP32_TRANSFER_MMIO)) { 1082 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x40); 1083 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40); 1084 } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 1085 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x10); 1086 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60); 1087 } else { 1088 nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode"); 1089 } 1090 1091 nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x", 1092 nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT), 1093 nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT)); 1094 1095 nsp32_index_write1(base, CLOCK_DIV, data->clock); 1096 nsp32_index_write1(base, BM_CYCLE, MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD); 1097 nsp32_write1(base, PARITY_CONTROL, 0); /* parity check is disable */ 1098 1099 /* 1100 * initialize MISC_WRRD register 1101 * 1102 * Note: Designated parameters is obeyed as following: 1103 * MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set. 1104 * MISC_MASTER_TERMINATION_SELECT: It must be set. 1105 * MISC_BMREQ_NEGATE_TIMING_SEL: It should be set. 1106 * MISC_AUTOSEL_TIMING_SEL: It should be set. 1107 * MISC_BMSTOP_CHANGE2_NONDATA_PHASE: It should be set. 1108 * MISC_DELAYED_BMSTART: It's selected for safety. 1109 * 1110 * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then 1111 * we have to set TRANSFERCONTROL_BM_START as 0 and set 1112 * appropriate value before restarting bus master transfer. 1113 */ 1114 nsp32_index_write2(base, MISC_WR, 1115 (SCSI_DIRECTION_DETECTOR_SELECT | 1116 DELAYED_BMSTART | 1117 MASTER_TERMINATION_SELECT | 1118 BMREQ_NEGATE_TIMING_SEL | 1119 AUTOSEL_TIMING_SEL | 1120 BMSTOP_CHANGE2_NONDATA_PHASE)); 1121 1122 nsp32_index_write1(base, TERM_PWR_CONTROL, 0); 1123 power = nsp32_index_read1(base, TERM_PWR_CONTROL); 1124 if (!(power & SENSE)) { 1125 nsp32_msg(KERN_INFO, "term power on"); 1126 nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR); 1127 } 1128 1129 nsp32_write2(base, TIMER_SET, TIMER_STOP); 1130 nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */ 1131 1132 nsp32_write1(base, SYNC_REG, 0); 1133 nsp32_write1(base, ACK_WIDTH, 0); 1134 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME); 1135 1136 /* 1137 * enable to select designated IRQ (except for 1138 * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR) 1139 */ 1140 nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ | 1141 IRQSELECT_SCSIRESET_IRQ | 1142 IRQSELECT_FIFO_SHLD_IRQ | 1143 IRQSELECT_RESELECT_IRQ | 1144 IRQSELECT_PHASE_CHANGE_IRQ | 1145 IRQSELECT_AUTO_SCSI_SEQ_IRQ | 1146 // IRQSELECT_BMCNTERR_IRQ | 1147 IRQSELECT_TARGET_ABORT_IRQ | 1148 IRQSELECT_MASTER_ABORT_IRQ ); 1149 nsp32_write2(base, IRQ_CONTROL, 0); 1150 1151 /* PCI LED off */ 1152 nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF); 1153 nsp32_index_write1(base, EXT_PORT, LED_OFF); 1154 1155 return TRUE; 1156} 1157 1158 1159/* interrupt routine */ 1160static irqreturn_t do_nsp32_isr(int irq, void *dev_id) 1161{ 1162 nsp32_hw_data *data = dev_id; 1163 unsigned int base = data->BaseAddress; 1164 struct scsi_cmnd *SCpnt = data->CurrentSC; 1165 unsigned short auto_stat, irq_stat, trans_stat; 1166 unsigned char busmon, busphase; 1167 unsigned long flags; 1168 int ret; 1169 int handled = 0; 1170 struct Scsi_Host *host = data->Host; 1171 1172 spin_lock_irqsave(host->host_lock, flags); 1173 1174 /* 1175 * IRQ check, then enable IRQ mask 1176 */ 1177 irq_stat = nsp32_read2(base, IRQ_STATUS); 1178 nsp32_dbg(NSP32_DEBUG_INTR, 1179 "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat); 1180 /* is this interrupt comes from Ninja asic? */ 1181 if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) { 1182 nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat); 1183 goto out2; 1184 } 1185 handled = 1; 1186 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 1187 1188 busmon = nsp32_read1(base, SCSI_BUS_MONITOR); 1189 busphase = busmon & BUSMON_PHASE_MASK; 1190 1191 trans_stat = nsp32_read2(base, TRANSFER_STATUS); 1192 if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) { 1193 nsp32_msg(KERN_INFO, "card disconnect"); 1194 if (data->CurrentSC != NULL) { 1195 nsp32_msg(KERN_INFO, "clean up current SCSI command"); 1196 SCpnt->result = DID_BAD_TARGET << 16; 1197 nsp32_scsi_done(SCpnt); 1198 } 1199 goto out; 1200 } 1201 1202 /* Timer IRQ */ 1203 if (irq_stat & IRQSTATUS_TIMER_IRQ) { 1204 nsp32_dbg(NSP32_DEBUG_INTR, "timer stop"); 1205 nsp32_write2(base, TIMER_SET, TIMER_STOP); 1206 goto out; 1207 } 1208 1209 /* SCSI reset */ 1210 if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) { 1211 nsp32_msg(KERN_INFO, "detected someone do bus reset"); 1212 nsp32_do_bus_reset(data); 1213 if (SCpnt != NULL) { 1214 SCpnt->result = DID_RESET << 16; 1215 nsp32_scsi_done(SCpnt); 1216 } 1217 goto out; 1218 } 1219 1220 if (SCpnt == NULL) { 1221 nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened"); 1222 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat); 1223 goto out; 1224 } 1225 1226 /* 1227 * AutoSCSI Interrupt. 1228 * Note: This interrupt is occurred when AutoSCSI is finished. Then 1229 * check SCSIEXECUTEPHASE, and do appropriate action. Each phases are 1230 * recorded when AutoSCSI sequencer has been processed. 1231 */ 1232 if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) { 1233 /* getting SCSI executed phase */ 1234 auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE); 1235 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0); 1236 1237 /* Selection Timeout, go busfree phase. */ 1238 if (auto_stat & SELECTION_TIMEOUT) { 1239 nsp32_dbg(NSP32_DEBUG_INTR, 1240 "selection timeout occurred"); 1241 1242 SCpnt->result = DID_TIME_OUT << 16; 1243 nsp32_scsi_done(SCpnt); 1244 goto out; 1245 } 1246 1247 if (auto_stat & MSGOUT_PHASE) { 1248 /* 1249 * MsgOut phase was processed. 1250 * If MSG_IN_OCCUER is not set, then MsgOut phase is 1251 * completed. Thus, msgout_len must reset. Otherwise, 1252 * nothing to do here. If MSG_OUT_OCCUER is occurred, 1253 * then we will encounter the condition and check. 1254 */ 1255 if (!(auto_stat & MSG_IN_OCCUER) && 1256 (data->msgout_len <= 3)) { 1257 /* 1258 * !MSG_IN_OCCUER && msgout_len <=3 1259 * ---> AutoSCSI with MSGOUTreg is processed. 1260 */ 1261 data->msgout_len = 0; 1262 }; 1263 1264 nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed"); 1265 } 1266 1267 if ((auto_stat & DATA_IN_PHASE) && 1268 (scsi_get_resid(SCpnt) > 0) && 1269 ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) { 1270 printk( "auto+fifo\n"); 1271 //nsp32_pio_read(SCpnt); 1272 } 1273 1274 if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) { 1275 /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */ 1276 nsp32_dbg(NSP32_DEBUG_INTR, 1277 "Data in/out phase processed"); 1278 1279 /* read BMCNT, SGT pointer addr */ 1280 nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx", 1281 nsp32_read4(base, BM_CNT)); 1282 nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx", 1283 nsp32_read4(base, SGT_ADR)); 1284 nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx", 1285 nsp32_read4(base, SACK_CNT)); 1286 nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx", 1287 nsp32_read4(base, SAVED_SACK_CNT)); 1288 1289 scsi_set_resid(SCpnt, 0); /* all data transferred! */ 1290 } 1291 1292 /* 1293 * MsgIn Occur 1294 */ 1295 if (auto_stat & MSG_IN_OCCUER) { 1296 nsp32_msgin_occur(SCpnt, irq_stat, auto_stat); 1297 } 1298 1299 /* 1300 * MsgOut Occur 1301 */ 1302 if (auto_stat & MSG_OUT_OCCUER) { 1303 nsp32_msgout_occur(SCpnt); 1304 } 1305 1306 /* 1307 * Bus Free Occur 1308 */ 1309 if (auto_stat & BUS_FREE_OCCUER) { 1310 ret = nsp32_busfree_occur(SCpnt, auto_stat); 1311 if (ret == TRUE) { 1312 goto out; 1313 } 1314 } 1315 1316 if (auto_stat & STATUS_PHASE) { 1317 /* 1318 * Read CSB and substitute CSB for SCpnt->result 1319 * to save status phase stutas byte. 1320 * scsi error handler checks host_byte (DID_*: 1321 * low level driver to indicate status), then checks 1322 * status_byte (SCSI status byte). 1323 */ 1324 SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN); 1325 } 1326 1327 if (auto_stat & ILLEGAL_PHASE) { 1328 /* Illegal phase is detected. SACK is not back. */ 1329 nsp32_msg(KERN_WARNING, 1330 "AUTO SCSI ILLEGAL PHASE OCCUR!!!!"); 1331 1332 /* TODO: currently we don't have any action... bus reset? */ 1333 1334 /* 1335 * To send back SACK, assert, wait, and negate. 1336 */ 1337 nsp32_sack_assert(data); 1338 nsp32_wait_req(data, NEGATE); 1339 nsp32_sack_negate(data); 1340 1341 } 1342 1343 if (auto_stat & COMMAND_PHASE) { 1344 /* nothing to do */ 1345 nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed"); 1346 } 1347 1348 if (auto_stat & AUTOSCSI_BUSY) { 1349 /* AutoSCSI is running */ 1350 } 1351 1352 show_autophase(auto_stat); 1353 } 1354 1355 /* FIFO_SHLD_IRQ */ 1356 if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) { 1357 nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ"); 1358 1359 switch(busphase) { 1360 case BUSPHASE_DATA_OUT: 1361 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write"); 1362 1363 //nsp32_pio_write(SCpnt); 1364 1365 break; 1366 1367 case BUSPHASE_DATA_IN: 1368 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read"); 1369 1370 //nsp32_pio_read(SCpnt); 1371 1372 break; 1373 1374 case BUSPHASE_STATUS: 1375 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status"); 1376 1377 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1378 1379 break; 1380 default: 1381 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase"); 1382 nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat); 1383 show_busphase(busphase); 1384 break; 1385 } 1386 1387 goto out; 1388 } 1389 1390 /* Phase Change IRQ */ 1391 if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) { 1392 nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ"); 1393 1394 switch(busphase) { 1395 case BUSPHASE_MESSAGE_IN: 1396 nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in"); 1397 nsp32_msgin_occur(SCpnt, irq_stat, 0); 1398 break; 1399 default: 1400 nsp32_msg(KERN_WARNING, "phase chg/other phase?"); 1401 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n", 1402 irq_stat, trans_stat); 1403 show_busphase(busphase); 1404 break; 1405 } 1406 goto out; 1407 } 1408 1409 /* PCI_IRQ */ 1410 if (irq_stat & IRQSTATUS_PCI_IRQ) { 1411 nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred"); 1412 /* Do nothing */ 1413 } 1414 1415 /* BMCNTERR_IRQ */ 1416 if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) { 1417 nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! "); 1418 /* 1419 * TODO: To be implemented improving bus master 1420 * transfer reliability when BMCNTERR is occurred in 1421 * AutoSCSI phase described in specification. 1422 */ 1423 } 1424 1425#if 0 1426 nsp32_dbg(NSP32_DEBUG_INTR, 1427 "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat); 1428 show_busphase(busphase); 1429#endif 1430 1431 out: 1432 /* disable IRQ mask */ 1433 nsp32_write2(base, IRQ_CONTROL, 0); 1434 1435 out2: 1436 spin_unlock_irqrestore(host->host_lock, flags); 1437 1438 nsp32_dbg(NSP32_DEBUG_INTR, "exit"); 1439 1440 return IRQ_RETVAL(handled); 1441} 1442 1443 1444static int nsp32_show_info(struct seq_file *m, struct Scsi_Host *host) 1445{ 1446 unsigned long flags; 1447 nsp32_hw_data *data; 1448 int hostno; 1449 unsigned int base; 1450 unsigned char mode_reg; 1451 int id, speed; 1452 long model; 1453 1454 hostno = host->host_no; 1455 data = (nsp32_hw_data *)host->hostdata; 1456 base = host->io_port; 1457 1458 seq_puts(m, "NinjaSCSI-32 status\n\n"); 1459 seq_printf(m, "Driver version: %s, $Revision: 1.33 $\n", nsp32_release_version); 1460 seq_printf(m, "SCSI host No.: %d\n", hostno); 1461 seq_printf(m, "IRQ: %d\n", host->irq); 1462 seq_printf(m, "IO: 0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1); 1463 seq_printf(m, "MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1); 1464 seq_printf(m, "sg_tablesize: %d\n", host->sg_tablesize); 1465 seq_printf(m, "Chip revision: 0x%x\n", (nsp32_read2(base, INDEX_REG) >> 8) & 0xff); 1466 1467 mode_reg = nsp32_index_read1(base, CHIP_MODE); 1468 model = data->pci_devid->driver_data; 1469 1470#ifdef CONFIG_PM 1471 seq_printf(m, "Power Management: %s\n", (mode_reg & OPTF) ? "yes" : "no"); 1472#endif 1473 seq_printf(m, "OEM: %ld, %s\n", (mode_reg & (OEM0|OEM1)), nsp32_model[model]); 1474 1475 spin_lock_irqsave(&(data->Lock), flags); 1476 seq_printf(m, "CurrentSC: 0x%p\n\n", data->CurrentSC); 1477 spin_unlock_irqrestore(&(data->Lock), flags); 1478 1479 1480 seq_puts(m, "SDTR status\n"); 1481 for (id = 0; id < ARRAY_SIZE(data->target); id++) { 1482 1483 seq_printf(m, "id %d: ", id); 1484 1485 if (id == host->this_id) { 1486 seq_puts(m, "----- NinjaSCSI-32 host adapter\n"); 1487 continue; 1488 } 1489 1490 if (data->target[id].sync_flag == SDTR_DONE) { 1491 if (data->target[id].period == 0 && 1492 data->target[id].offset == ASYNC_OFFSET ) { 1493 seq_puts(m, "async"); 1494 } else { 1495 seq_puts(m, " sync"); 1496 } 1497 } else { 1498 seq_puts(m, " none"); 1499 } 1500 1501 if (data->target[id].period != 0) { 1502 1503 speed = 1000000 / (data->target[id].period * 4); 1504 1505 seq_printf(m, " transfer %d.%dMB/s, offset %d", 1506 speed / 1000, 1507 speed % 1000, 1508 data->target[id].offset 1509 ); 1510 } 1511 seq_putc(m, '\n'); 1512 } 1513 return 0; 1514} 1515 1516 1517 1518/* 1519 * Reset parameters and call scsi_done for data->cur_lunt. 1520 * Be careful setting SCpnt->result = DID_* before calling this function. 1521 */ 1522static void nsp32_scsi_done(struct scsi_cmnd *SCpnt) 1523{ 1524 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1525 unsigned int base = SCpnt->device->host->io_port; 1526 1527 scsi_dma_unmap(SCpnt); 1528 1529 /* 1530 * clear TRANSFERCONTROL_BM_START 1531 */ 1532 nsp32_write2(base, TRANSFER_CONTROL, 0); 1533 nsp32_write4(base, BM_CNT, 0); 1534 1535 /* 1536 * call scsi_done 1537 */ 1538 (*SCpnt->scsi_done)(SCpnt); 1539 1540 /* 1541 * reset parameters 1542 */ 1543 data->cur_lunt->SCpnt = NULL; 1544 data->cur_lunt = NULL; 1545 data->cur_target = NULL; 1546 data->CurrentSC = NULL; 1547} 1548 1549 1550/* 1551 * Bus Free Occur 1552 * 1553 * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase 1554 * with ACK reply when below condition is matched: 1555 * MsgIn 00: Command Complete. 1556 * MsgIn 02: Save Data Pointer. 1557 * MsgIn 04: Diconnect. 1558 * In other case, unexpected BUSFREE is detected. 1559 */ 1560static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph) 1561{ 1562 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1563 unsigned int base = SCpnt->device->host->io_port; 1564 1565 nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph); 1566 show_autophase(execph); 1567 1568 nsp32_write4(base, BM_CNT, 0); 1569 nsp32_write2(base, TRANSFER_CONTROL, 0); 1570 1571 /* 1572 * MsgIn 02: Save Data Pointer 1573 * 1574 * VALID: 1575 * Save Data Pointer is received. Adjust pointer. 1576 * 1577 * NO-VALID: 1578 * SCSI-3 says if Save Data Pointer is not received, then we restart 1579 * processing and we can't adjust any SCSI data pointer in next data 1580 * phase. 1581 */ 1582 if (execph & MSGIN_02_VALID) { 1583 nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid"); 1584 1585 /* 1586 * Check sack_cnt/saved_sack_cnt, then adjust sg table if 1587 * needed. 1588 */ 1589 if (!(execph & MSGIN_00_VALID) && 1590 ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) { 1591 unsigned int sacklen, s_sacklen; 1592 1593 /* 1594 * Read SACK count and SAVEDSACK count, then compare. 1595 */ 1596 sacklen = nsp32_read4(base, SACK_CNT ); 1597 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT); 1598 1599 /* 1600 * If SAVEDSACKCNT == 0, it means SavedDataPointer is 1601 * come after data transferring. 1602 */ 1603 if (s_sacklen > 0) { 1604 /* 1605 * Comparing between sack and savedsack to 1606 * check the condition of AutoMsgIn03. 1607 * 1608 * If they are same, set msgin03 == TRUE, 1609 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at 1610 * reselection. On the other hand, if they 1611 * aren't same, set msgin03 == FALSE, and 1612 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at 1613 * reselection. 1614 */ 1615 if (sacklen != s_sacklen) { 1616 data->cur_lunt->msgin03 = FALSE; 1617 } else { 1618 data->cur_lunt->msgin03 = TRUE; 1619 } 1620 1621 nsp32_adjust_busfree(SCpnt, s_sacklen); 1622 } 1623 } 1624 1625 /* This value has not substitude with valid value yet... */ 1626 //data->cur_lunt->save_datp = data->cur_datp; 1627 } else { 1628 /* 1629 * no processing. 1630 */ 1631 } 1632 1633 if (execph & MSGIN_03_VALID) { 1634 /* MsgIn03 was valid to be processed. No need processing. */ 1635 } 1636 1637 /* 1638 * target SDTR check 1639 */ 1640 if (data->cur_target->sync_flag & SDTR_INITIATOR) { 1641 /* 1642 * SDTR negotiation pulled by the initiator has not 1643 * finished yet. Fall back to ASYNC mode. 1644 */ 1645 nsp32_set_async(data, data->cur_target); 1646 data->cur_target->sync_flag &= ~SDTR_INITIATOR; 1647 data->cur_target->sync_flag |= SDTR_DONE; 1648 } else if (data->cur_target->sync_flag & SDTR_TARGET) { 1649 /* 1650 * SDTR negotiation pulled by the target has been 1651 * negotiating. 1652 */ 1653 if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) { 1654 /* 1655 * If valid message is received, then 1656 * negotiation is succeeded. 1657 */ 1658 } else { 1659 /* 1660 * On the contrary, if unexpected bus free is 1661 * occurred, then negotiation is failed. Fall 1662 * back to ASYNC mode. 1663 */ 1664 nsp32_set_async(data, data->cur_target); 1665 } 1666 data->cur_target->sync_flag &= ~SDTR_TARGET; 1667 data->cur_target->sync_flag |= SDTR_DONE; 1668 } 1669 1670 /* 1671 * It is always ensured by SCSI standard that initiator 1672 * switches into Bus Free Phase after 1673 * receiving message 00 (Command Complete), 04 (Disconnect). 1674 * It's the reason that processing here is valid. 1675 */ 1676 if (execph & MSGIN_00_VALID) { 1677 /* MsgIn 00: Command Complete */ 1678 nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete"); 1679 1680 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1681 SCpnt->SCp.Message = 0; 1682 nsp32_dbg(NSP32_DEBUG_BUSFREE, 1683 "normal end stat=0x%x resid=0x%x\n", 1684 SCpnt->SCp.Status, scsi_get_resid(SCpnt)); 1685 SCpnt->result = (DID_OK << 16) | 1686 (SCpnt->SCp.Message << 8) | 1687 (SCpnt->SCp.Status << 0); 1688 nsp32_scsi_done(SCpnt); 1689 /* All operation is done */ 1690 return TRUE; 1691 } else if (execph & MSGIN_04_VALID) { 1692 /* MsgIn 04: Disconnect */ 1693 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1694 SCpnt->SCp.Message = 4; 1695 1696 nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect"); 1697 return TRUE; 1698 } else { 1699 /* Unexpected bus free */ 1700 nsp32_msg(KERN_WARNING, "unexpected bus free occurred"); 1701 1702 /* DID_ERROR? */ 1703 //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0); 1704 SCpnt->result = DID_ERROR << 16; 1705 nsp32_scsi_done(SCpnt); 1706 return TRUE; 1707 } 1708 return FALSE; 1709} 1710 1711 1712/* 1713 * nsp32_adjust_busfree - adjusting SG table 1714 * 1715 * Note: This driver adjust the SG table using SCSI ACK 1716 * counter instead of BMCNT counter! 1717 */ 1718static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen) 1719{ 1720 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1721 int old_entry = data->cur_entry; 1722 int new_entry; 1723 int sg_num = data->cur_lunt->sg_num; 1724 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt; 1725 unsigned int restlen, sentlen; 1726 u32_le len, addr; 1727 1728 nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", scsi_get_resid(SCpnt)); 1729 1730 /* adjust saved SACK count with 4 byte start address boundary */ 1731 s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3; 1732 1733 /* 1734 * calculate new_entry from sack count and each sgt[].len 1735 * calculate the byte which is intent to send 1736 */ 1737 sentlen = 0; 1738 for (new_entry = old_entry; new_entry < sg_num; new_entry++) { 1739 sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND); 1740 if (sentlen > s_sacklen) { 1741 break; 1742 } 1743 } 1744 1745 /* all sgt is processed */ 1746 if (new_entry == sg_num) { 1747 goto last; 1748 } 1749 1750 if (sentlen == s_sacklen) { 1751 /* XXX: confirm it's ok or not */ 1752 /* In this case, it's ok because we are at 1753 the head element of the sg. restlen is correctly calculated. */ 1754 } 1755 1756 /* calculate the rest length for transferring */ 1757 restlen = sentlen - s_sacklen; 1758 1759 /* update adjusting current SG table entry */ 1760 len = le32_to_cpu(sgt[new_entry].len); 1761 addr = le32_to_cpu(sgt[new_entry].addr); 1762 addr += (len - restlen); 1763 sgt[new_entry].addr = cpu_to_le32(addr); 1764 sgt[new_entry].len = cpu_to_le32(restlen); 1765 1766 /* set cur_entry with new_entry */ 1767 data->cur_entry = new_entry; 1768 1769 return; 1770 1771 last: 1772 if (scsi_get_resid(SCpnt) < sentlen) { 1773 nsp32_msg(KERN_ERR, "resid underflow"); 1774 } 1775 1776 scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) - sentlen); 1777 nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", scsi_get_resid(SCpnt)); 1778 1779 /* update hostdata and lun */ 1780 1781 return; 1782} 1783 1784 1785/* 1786 * It's called MsgOut phase occur. 1787 * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in 1788 * message out phase. It, however, has more than 3 messages, 1789 * HBA creates the interrupt and we have to process by hand. 1790 */ 1791static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt) 1792{ 1793 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1794 unsigned int base = SCpnt->device->host->io_port; 1795 //unsigned short command; 1796 long new_sgtp; 1797 int i; 1798 1799 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, 1800 "enter: msgout_len: 0x%x", data->msgout_len); 1801 1802 /* 1803 * If MsgOut phase is occurred without having any 1804 * message, then No_Operation is sent (SCSI-2). 1805 */ 1806 if (data->msgout_len == 0) { 1807 nsp32_build_nop(SCpnt); 1808 } 1809 1810 /* 1811 * Set SGTP ADDR current entry for restarting AUTOSCSI, 1812 * because SGTP is incremented next point. 1813 * There is few statement in the specification... 1814 */ 1815 new_sgtp = data->cur_lunt->sglun_paddr + 1816 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable)); 1817 1818 /* 1819 * send messages 1820 */ 1821 for (i = 0; i < data->msgout_len; i++) { 1822 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, 1823 "%d : 0x%x", i, data->msgoutbuf[i]); 1824 1825 /* 1826 * Check REQ is asserted. 1827 */ 1828 nsp32_wait_req(data, ASSERT); 1829 1830 if (i == (data->msgout_len - 1)) { 1831 /* 1832 * If the last message, set the AutoSCSI restart 1833 * before send back the ack message. AutoSCSI 1834 * restart automatically negate ATN signal. 1835 */ 1836 //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02); 1837 //nsp32_restart_autoscsi(SCpnt, command); 1838 nsp32_write2(base, COMMAND_CONTROL, 1839 (CLEAR_CDB_FIFO_POINTER | 1840 AUTO_COMMAND_PHASE | 1841 AUTOSCSI_RESTART | 1842 AUTO_MSGIN_00_OR_04 | 1843 AUTO_MSGIN_02 )); 1844 } 1845 /* 1846 * Write data with SACK, then wait sack is 1847 * automatically negated. 1848 */ 1849 nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]); 1850 nsp32_wait_sack(data, NEGATE); 1851 1852 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n", 1853 nsp32_read1(base, SCSI_BUS_MONITOR)); 1854 }; 1855 1856 data->msgout_len = 0; 1857 1858 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit"); 1859} 1860 1861/* 1862 * Restart AutoSCSI 1863 * 1864 * Note: Restarting AutoSCSI needs set: 1865 * SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL 1866 */ 1867static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command) 1868{ 1869 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1870 unsigned int base = data->BaseAddress; 1871 unsigned short transfer = 0; 1872 1873 nsp32_dbg(NSP32_DEBUG_RESTART, "enter"); 1874 1875 if (data->cur_target == NULL || data->cur_lunt == NULL) { 1876 nsp32_msg(KERN_ERR, "Target or Lun is invalid"); 1877 } 1878 1879 /* 1880 * set SYNC_REG 1881 * Don't set BM_START_ADR before setting this register. 1882 */ 1883 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg); 1884 1885 /* 1886 * set ACKWIDTH 1887 */ 1888 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth); 1889 1890 /* 1891 * set SREQ hazard killer sampling rate 1892 */ 1893 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg); 1894 1895 /* 1896 * set SGT ADDR (physical address) 1897 */ 1898 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr); 1899 1900 /* 1901 * set TRANSFER CONTROL REG 1902 */ 1903 transfer = 0; 1904 transfer |= (TRANSFER_GO | ALL_COUNTER_CLR); 1905 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 1906 if (scsi_bufflen(SCpnt) > 0) { 1907 transfer |= BM_START; 1908 } 1909 } else if (data->trans_method & NSP32_TRANSFER_MMIO) { 1910 transfer |= CB_MMIO_MODE; 1911 } else if (data->trans_method & NSP32_TRANSFER_PIO) { 1912 transfer |= CB_IO_MODE; 1913 } 1914 nsp32_write2(base, TRANSFER_CONTROL, transfer); 1915 1916 /* 1917 * restart AutoSCSI 1918 * 1919 * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ? 1920 */ 1921 command |= (CLEAR_CDB_FIFO_POINTER | 1922 AUTO_COMMAND_PHASE | 1923 AUTOSCSI_RESTART ); 1924 nsp32_write2(base, COMMAND_CONTROL, command); 1925 1926 nsp32_dbg(NSP32_DEBUG_RESTART, "exit"); 1927} 1928 1929 1930/* 1931 * cannot run automatically message in occur 1932 */ 1933static void nsp32_msgin_occur(struct scsi_cmnd *SCpnt, 1934 unsigned long irq_status, 1935 unsigned short execph) 1936{ 1937 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1938 unsigned int base = SCpnt->device->host->io_port; 1939 unsigned char msg; 1940 unsigned char msgtype; 1941 unsigned char newlun; 1942 unsigned short command = 0; 1943 int msgclear = TRUE; 1944 long new_sgtp; 1945 int ret; 1946 1947 /* 1948 * read first message 1949 * Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure 1950 * of Message-In have to be processed before sending back SCSI ACK. 1951 */ 1952 msg = nsp32_read1(base, SCSI_DATA_IN); 1953 data->msginbuf[(unsigned char)data->msgin_len] = msg; 1954 msgtype = data->msginbuf[0]; 1955 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, 1956 "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x", 1957 data->msgin_len, msg, msgtype); 1958 1959 /* 1960 * TODO: We need checking whether bus phase is message in? 1961 */ 1962 1963 /* 1964 * assert SCSI ACK 1965 */ 1966 nsp32_sack_assert(data); 1967 1968 /* 1969 * processing IDENTIFY 1970 */ 1971 if (msgtype & 0x80) { 1972 if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) { 1973 /* Invalid (non reselect) phase */ 1974 goto reject; 1975 } 1976 1977 newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */ 1978 ret = nsp32_reselection(SCpnt, newlun); 1979 if (ret == TRUE) { 1980 goto restart; 1981 } else { 1982 goto reject; 1983 } 1984 } 1985 1986 /* 1987 * processing messages except for IDENTIFY 1988 * 1989 * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO. 1990 */ 1991 switch (msgtype) { 1992 /* 1993 * 1-byte message 1994 */ 1995 case COMMAND_COMPLETE: 1996 case DISCONNECT: 1997 /* 1998 * These messages should not be occurred. 1999 * They should be processed on AutoSCSI sequencer. 2000 */ 2001 nsp32_msg(KERN_WARNING, 2002 "unexpected message of AutoSCSI MsgIn: 0x%x", msg); 2003 break; 2004 2005 case RESTORE_POINTERS: 2006 /* 2007 * AutoMsgIn03 is disabled, and HBA gets this message. 2008 */ 2009 2010 if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) { 2011 unsigned int s_sacklen; 2012 2013 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT); 2014 if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) { 2015 nsp32_adjust_busfree(SCpnt, s_sacklen); 2016 } else { 2017 /* No need to rewrite SGT */ 2018 } 2019 } 2020 data->cur_lunt->msgin03 = FALSE; 2021 2022 /* Update with the new value */ 2023 2024 /* reset SACK/SavedACK counter (or ALL clear?) */ 2025 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 2026 2027 /* 2028 * set new sg pointer 2029 */ 2030 new_sgtp = data->cur_lunt->sglun_paddr + 2031 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable)); 2032 nsp32_write4(base, SGT_ADR, new_sgtp); 2033 2034 break; 2035 2036 case SAVE_POINTERS: 2037 /* 2038 * These messages should not be occurred. 2039 * They should be processed on AutoSCSI sequencer. 2040 */ 2041 nsp32_msg (KERN_WARNING, 2042 "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS"); 2043 2044 break; 2045 2046 case MESSAGE_REJECT: 2047 /* If previous message_out is sending SDTR, and get 2048 message_reject from target, SDTR negotiation is failed */ 2049 if (data->cur_target->sync_flag & 2050 (SDTR_INITIATOR | SDTR_TARGET)) { 2051 /* 2052 * Current target is negotiating SDTR, but it's 2053 * failed. Fall back to async transfer mode, and set 2054 * SDTR_DONE. 2055 */ 2056 nsp32_set_async(data, data->cur_target); 2057 data->cur_target->sync_flag &= ~SDTR_INITIATOR; 2058 data->cur_target->sync_flag |= SDTR_DONE; 2059 2060 } 2061 break; 2062 2063 case LINKED_CMD_COMPLETE: 2064 case LINKED_FLG_CMD_COMPLETE: 2065 /* queue tag is not supported currently */ 2066 nsp32_msg (KERN_WARNING, 2067 "unsupported message: 0x%x", msgtype); 2068 break; 2069 2070 case INITIATE_RECOVERY: 2071 /* staring ECA (Extended Contingent Allegiance) state. */ 2072 /* This message is declined in SPI2 or later. */ 2073 2074 goto reject; 2075 2076 /* 2077 * 2-byte message 2078 */ 2079 case SIMPLE_QUEUE_TAG: 2080 case 0x23: 2081 /* 2082 * 0x23: Ignore_Wide_Residue is not declared in scsi.h. 2083 * No support is needed. 2084 */ 2085 if (data->msgin_len >= 1) { 2086 goto reject; 2087 } 2088 2089 /* current position is 1-byte of 2 byte */ 2090 msgclear = FALSE; 2091 2092 break; 2093 2094 /* 2095 * extended message 2096 */ 2097 case EXTENDED_MESSAGE: 2098 if (data->msgin_len < 1) { 2099 /* 2100 * Current position does not reach 2-byte 2101 * (2-byte is extended message length). 2102 */ 2103 msgclear = FALSE; 2104 break; 2105 } 2106 2107 if ((data->msginbuf[1] + 1) > data->msgin_len) { 2108 /* 2109 * Current extended message has msginbuf[1] + 2 2110 * (msgin_len starts counting from 0, so buf[1] + 1). 2111 * If current message position is not finished, 2112 * continue receiving message. 2113 */ 2114 msgclear = FALSE; 2115 break; 2116 } 2117 2118 /* 2119 * Reach here means regular length of each type of 2120 * extended messages. 2121 */ 2122 switch (data->msginbuf[2]) { 2123 case EXTENDED_MODIFY_DATA_POINTER: 2124 /* TODO */ 2125 goto reject; /* not implemented yet */ 2126 break; 2127 2128 case EXTENDED_SDTR: 2129 /* 2130 * Exchange this message between initiator and target. 2131 */ 2132 if (data->msgin_len != EXTENDED_SDTR_LEN + 1) { 2133 /* 2134 * received inappropriate message. 2135 */ 2136 goto reject; 2137 break; 2138 } 2139 2140 nsp32_analyze_sdtr(SCpnt); 2141 2142 break; 2143 2144 case EXTENDED_EXTENDED_IDENTIFY: 2145 /* SCSI-I only, not supported. */ 2146 goto reject; /* not implemented yet */ 2147 2148 break; 2149 2150 case EXTENDED_WDTR: 2151 goto reject; /* not implemented yet */ 2152 2153 break; 2154 2155 default: 2156 goto reject; 2157 } 2158 break; 2159 2160 default: 2161 goto reject; 2162 } 2163 2164 restart: 2165 if (msgclear == TRUE) { 2166 data->msgin_len = 0; 2167 2168 /* 2169 * If restarting AutoSCSI, but there are some message to out 2170 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0 2171 * (MV_VALID = 0). When commandcontrol is written with 2172 * AutoSCSI restart, at the same time MsgOutOccur should be 2173 * happened (however, such situation is really possible...?). 2174 */ 2175 if (data->msgout_len > 0) { 2176 nsp32_write4(base, SCSI_MSG_OUT, 0); 2177 command |= AUTO_ATN; 2178 } 2179 2180 /* 2181 * restart AutoSCSI 2182 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed. 2183 */ 2184 command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02); 2185 2186 /* 2187 * If current msgin03 is TRUE, then flag on. 2188 */ 2189 if (data->cur_lunt->msgin03 == TRUE) { 2190 command |= AUTO_MSGIN_03; 2191 } 2192 data->cur_lunt->msgin03 = FALSE; 2193 } else { 2194 data->msgin_len++; 2195 } 2196 2197 /* 2198 * restart AutoSCSI 2199 */ 2200 nsp32_restart_autoscsi(SCpnt, command); 2201 2202 /* 2203 * wait SCSI REQ negate for REQ-ACK handshake 2204 */ 2205 nsp32_wait_req(data, NEGATE); 2206 2207 /* 2208 * negate SCSI ACK 2209 */ 2210 nsp32_sack_negate(data); 2211 2212 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit"); 2213 2214 return; 2215 2216 reject: 2217 nsp32_msg(KERN_WARNING, 2218 "invalid or unsupported MessageIn, rejected. " 2219 "current msg: 0x%x (len: 0x%x), processing msg: 0x%x", 2220 msg, data->msgin_len, msgtype); 2221 nsp32_build_reject(SCpnt); 2222 data->msgin_len = 0; 2223 2224 goto restart; 2225} 2226 2227/* 2228 * 2229 */ 2230static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt) 2231{ 2232 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2233 nsp32_target *target = data->cur_target; 2234 nsp32_sync_table *synct; 2235 unsigned char get_period = data->msginbuf[3]; 2236 unsigned char get_offset = data->msginbuf[4]; 2237 int entry; 2238 int syncnum; 2239 2240 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter"); 2241 2242 synct = data->synct; 2243 syncnum = data->syncnum; 2244 2245 /* 2246 * If this inititor sent the SDTR message, then target responds SDTR, 2247 * initiator SYNCREG, ACKWIDTH from SDTR parameter. 2248 * Messages are not appropriate, then send back reject message. 2249 * If initiator did not send the SDTR, but target sends SDTR, 2250 * initiator calculator the appropriate parameter and send back SDTR. 2251 */ 2252 if (target->sync_flag & SDTR_INITIATOR) { 2253 /* 2254 * Initiator sent SDTR, the target responds and 2255 * send back negotiation SDTR. 2256 */ 2257 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR"); 2258 2259 target->sync_flag &= ~SDTR_INITIATOR; 2260 target->sync_flag |= SDTR_DONE; 2261 2262 /* 2263 * offset: 2264 */ 2265 if (get_offset > SYNC_OFFSET) { 2266 /* 2267 * Negotiation is failed, the target send back 2268 * unexpected offset value. 2269 */ 2270 goto reject; 2271 } 2272 2273 if (get_offset == ASYNC_OFFSET) { 2274 /* 2275 * Negotiation is succeeded, the target want 2276 * to fall back into asynchronous transfer mode. 2277 */ 2278 goto async; 2279 } 2280 2281 /* 2282 * period: 2283 * Check whether sync period is too short. If too short, 2284 * fall back to async mode. If it's ok, then investigate 2285 * the received sync period. If sync period is acceptable 2286 * between sync table start_period and end_period, then 2287 * set this I_T nexus as sent offset and period. 2288 * If it's not acceptable, send back reject and fall back 2289 * to async mode. 2290 */ 2291 if (get_period < data->synct[0].period_num) { 2292 /* 2293 * Negotiation is failed, the target send back 2294 * unexpected period value. 2295 */ 2296 goto reject; 2297 } 2298 2299 entry = nsp32_search_period_entry(data, target, get_period); 2300 2301 if (entry < 0) { 2302 /* 2303 * Target want to use long period which is not 2304 * acceptable NinjaSCSI-32Bi/UDE. 2305 */ 2306 goto reject; 2307 } 2308 2309 /* 2310 * Set new sync table and offset in this I_T nexus. 2311 */ 2312 nsp32_set_sync_entry(data, target, entry, get_offset); 2313 } else { 2314 /* Target send SDTR to initiator. */ 2315 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR"); 2316 2317 target->sync_flag |= SDTR_INITIATOR; 2318 2319 /* offset: */ 2320 if (get_offset > SYNC_OFFSET) { 2321 /* send back as SYNC_OFFSET */ 2322 get_offset = SYNC_OFFSET; 2323 } 2324 2325 /* period: */ 2326 if (get_period < data->synct[0].period_num) { 2327 get_period = data->synct[0].period_num; 2328 } 2329 2330 entry = nsp32_search_period_entry(data, target, get_period); 2331 2332 if (get_offset == ASYNC_OFFSET || entry < 0) { 2333 nsp32_set_async(data, target); 2334 nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET); 2335 } else { 2336 nsp32_set_sync_entry(data, target, entry, get_offset); 2337 nsp32_build_sdtr(SCpnt, get_period, get_offset); 2338 } 2339 } 2340 2341 target->period = get_period; 2342 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit"); 2343 return; 2344 2345 reject: 2346 /* 2347 * If the current message is unacceptable, send back to the target 2348 * with reject message. 2349 */ 2350 nsp32_build_reject(SCpnt); 2351 2352 async: 2353 nsp32_set_async(data, target); /* set as ASYNC transfer mode */ 2354 2355 target->period = 0; 2356 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async"); 2357 return; 2358} 2359 2360 2361/* 2362 * Search config entry number matched in sync_table from given 2363 * target and speed period value. If failed to search, return negative value. 2364 */ 2365static int nsp32_search_period_entry(nsp32_hw_data *data, 2366 nsp32_target *target, 2367 unsigned char period) 2368{ 2369 int i; 2370 2371 if (target->limit_entry >= data->syncnum) { 2372 nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!"); 2373 target->limit_entry = 0; 2374 } 2375 2376 for (i = target->limit_entry; i < data->syncnum; i++) { 2377 if (period >= data->synct[i].start_period && 2378 period <= data->synct[i].end_period) { 2379 break; 2380 } 2381 } 2382 2383 /* 2384 * Check given period value is over the sync_table value. 2385 * If so, return max value. 2386 */ 2387 if (i == data->syncnum) { 2388 i = -1; 2389 } 2390 2391 return i; 2392} 2393 2394 2395/* 2396 * target <-> initiator use ASYNC transfer 2397 */ 2398static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target) 2399{ 2400 unsigned char period = data->synct[target->limit_entry].period_num; 2401 2402 target->offset = ASYNC_OFFSET; 2403 target->period = 0; 2404 target->syncreg = TO_SYNCREG(period, ASYNC_OFFSET); 2405 target->ackwidth = 0; 2406 target->sample_reg = 0; 2407 2408 nsp32_dbg(NSP32_DEBUG_SYNC, "set async"); 2409} 2410 2411 2412/* 2413 * target <-> initiator use maximum SYNC transfer 2414 */ 2415static void nsp32_set_max_sync(nsp32_hw_data *data, 2416 nsp32_target *target, 2417 unsigned char *period, 2418 unsigned char *offset) 2419{ 2420 unsigned char period_num, ackwidth; 2421 2422 period_num = data->synct[target->limit_entry].period_num; 2423 *period = data->synct[target->limit_entry].start_period; 2424 ackwidth = data->synct[target->limit_entry].ackwidth; 2425 *offset = SYNC_OFFSET; 2426 2427 target->syncreg = TO_SYNCREG(period_num, *offset); 2428 target->ackwidth = ackwidth; 2429 target->offset = *offset; 2430 target->sample_reg = 0; /* disable SREQ sampling */ 2431} 2432 2433 2434/* 2435 * target <-> initiator use entry number speed 2436 */ 2437static void nsp32_set_sync_entry(nsp32_hw_data *data, 2438 nsp32_target *target, 2439 int entry, 2440 unsigned char offset) 2441{ 2442 unsigned char period, ackwidth, sample_rate; 2443 2444 period = data->synct[entry].period_num; 2445 ackwidth = data->synct[entry].ackwidth; 2446 offset = offset; 2447 sample_rate = data->synct[entry].sample_rate; 2448 2449 target->syncreg = TO_SYNCREG(period, offset); 2450 target->ackwidth = ackwidth; 2451 target->offset = offset; 2452 target->sample_reg = sample_rate | SAMPLING_ENABLE; 2453 2454 nsp32_dbg(NSP32_DEBUG_SYNC, "set sync"); 2455} 2456 2457 2458/* 2459 * It waits until SCSI REQ becomes assertion or negation state. 2460 * 2461 * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then 2462 * connected target responds SCSI REQ negation. We have to wait 2463 * SCSI REQ becomes negation in order to negate SCSI ACK signal for 2464 * REQ-ACK handshake. 2465 */ 2466static void nsp32_wait_req(nsp32_hw_data *data, int state) 2467{ 2468 unsigned int base = data->BaseAddress; 2469 int wait_time = 0; 2470 unsigned char bus, req_bit; 2471 2472 if (!((state == ASSERT) || (state == NEGATE))) { 2473 nsp32_msg(KERN_ERR, "unknown state designation"); 2474 } 2475 /* REQ is BIT(5) */ 2476 req_bit = (state == ASSERT ? BUSMON_REQ : 0); 2477 2478 do { 2479 bus = nsp32_read1(base, SCSI_BUS_MONITOR); 2480 if ((bus & BUSMON_REQ) == req_bit) { 2481 nsp32_dbg(NSP32_DEBUG_WAIT, 2482 "wait_time: %d", wait_time); 2483 return; 2484 } 2485 udelay(1); 2486 wait_time++; 2487 } while (wait_time < REQSACK_TIMEOUT_TIME); 2488 2489 nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit); 2490} 2491 2492/* 2493 * It waits until SCSI SACK becomes assertion or negation state. 2494 */ 2495static void nsp32_wait_sack(nsp32_hw_data *data, int state) 2496{ 2497 unsigned int base = data->BaseAddress; 2498 int wait_time = 0; 2499 unsigned char bus, ack_bit; 2500 2501 if (!((state == ASSERT) || (state == NEGATE))) { 2502 nsp32_msg(KERN_ERR, "unknown state designation"); 2503 } 2504 /* ACK is BIT(4) */ 2505 ack_bit = (state == ASSERT ? BUSMON_ACK : 0); 2506 2507 do { 2508 bus = nsp32_read1(base, SCSI_BUS_MONITOR); 2509 if ((bus & BUSMON_ACK) == ack_bit) { 2510 nsp32_dbg(NSP32_DEBUG_WAIT, 2511 "wait_time: %d", wait_time); 2512 return; 2513 } 2514 udelay(1); 2515 wait_time++; 2516 } while (wait_time < REQSACK_TIMEOUT_TIME); 2517 2518 nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit); 2519} 2520 2521/* 2522 * assert SCSI ACK 2523 * 2524 * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1. 2525 */ 2526static void nsp32_sack_assert(nsp32_hw_data *data) 2527{ 2528 unsigned int base = data->BaseAddress; 2529 unsigned char busctrl; 2530 2531 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL); 2532 busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB); 2533 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl); 2534} 2535 2536/* 2537 * negate SCSI ACK 2538 */ 2539static void nsp32_sack_negate(nsp32_hw_data *data) 2540{ 2541 unsigned int base = data->BaseAddress; 2542 unsigned char busctrl; 2543 2544 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL); 2545 busctrl &= ~BUSCTL_ACK; 2546 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl); 2547} 2548 2549 2550 2551/* 2552 * Note: n_io_port is defined as 0x7f because I/O register port is 2553 * assigned as: 2554 * 0x800-0x8ff: memory mapped I/O port 2555 * 0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly) 2556 * 0xc00-0xfff: CardBus status registers 2557 */ 2558static int nsp32_detect(struct pci_dev *pdev) 2559{ 2560 struct Scsi_Host *host; /* registered host structure */ 2561 struct resource *res; 2562 nsp32_hw_data *data; 2563 int ret; 2564 int i, j; 2565 2566 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 2567 2568 /* 2569 * register this HBA as SCSI device 2570 */ 2571 host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data)); 2572 if (host == NULL) { 2573 nsp32_msg (KERN_ERR, "failed to scsi register"); 2574 goto err; 2575 } 2576 2577 /* 2578 * set nsp32_hw_data 2579 */ 2580 data = (nsp32_hw_data *)host->hostdata; 2581 2582 memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data)); 2583 2584 host->irq = data->IrqNumber; 2585 host->io_port = data->BaseAddress; 2586 host->unique_id = data->BaseAddress; 2587 host->n_io_port = data->NumAddress; 2588 host->base = (unsigned long)data->MmioAddress; 2589 2590 data->Host = host; 2591 spin_lock_init(&(data->Lock)); 2592 2593 data->cur_lunt = NULL; 2594 data->cur_target = NULL; 2595 2596 /* 2597 * Bus master transfer mode is supported currently. 2598 */ 2599 data->trans_method = NSP32_TRANSFER_BUSMASTER; 2600 2601 /* 2602 * Set clock div, CLOCK_4 (HBA has own external clock, and 2603 * dividing * 100ns/4). 2604 * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet. 2605 */ 2606 data->clock = CLOCK_4; 2607 2608 /* 2609 * Select appropriate nsp32_sync_table and set I_CLOCKDIV. 2610 */ 2611 switch (data->clock) { 2612 case CLOCK_4: 2613 /* If data->clock is CLOCK_4, then select 40M sync table. */ 2614 data->synct = nsp32_sync_table_40M; 2615 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M); 2616 break; 2617 case CLOCK_2: 2618 /* If data->clock is CLOCK_2, then select 20M sync table. */ 2619 data->synct = nsp32_sync_table_20M; 2620 data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M); 2621 break; 2622 case PCICLK: 2623 /* If data->clock is PCICLK, then select pci sync table. */ 2624 data->synct = nsp32_sync_table_pci; 2625 data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci); 2626 break; 2627 default: 2628 nsp32_msg(KERN_WARNING, 2629 "Invalid clock div is selected, set CLOCK_4."); 2630 /* Use default value CLOCK_4 */ 2631 data->clock = CLOCK_4; 2632 data->synct = nsp32_sync_table_40M; 2633 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M); 2634 } 2635 2636 /* 2637 * setup nsp32_lunt 2638 */ 2639 2640 /* 2641 * setup DMA 2642 */ 2643 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 2644 nsp32_msg (KERN_ERR, "failed to set PCI DMA mask"); 2645 goto scsi_unregister; 2646 } 2647 2648 /* 2649 * allocate autoparam DMA resource. 2650 */ 2651 data->autoparam = pci_alloc_consistent(pdev, sizeof(nsp32_autoparam), &(data->auto_paddr)); 2652 if (data->autoparam == NULL) { 2653 nsp32_msg(KERN_ERR, "failed to allocate DMA memory"); 2654 goto scsi_unregister; 2655 } 2656 2657 /* 2658 * allocate scatter-gather DMA resource. 2659 */ 2660 data->sg_list = pci_alloc_consistent(pdev, NSP32_SG_TABLE_SIZE, 2661 &(data->sg_paddr)); 2662 if (data->sg_list == NULL) { 2663 nsp32_msg(KERN_ERR, "failed to allocate DMA memory"); 2664 goto free_autoparam; 2665 } 2666 2667 for (i = 0; i < ARRAY_SIZE(data->lunt); i++) { 2668 for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) { 2669 int offset = i * ARRAY_SIZE(data->lunt[0]) + j; 2670 nsp32_lunt tmp = { 2671 .SCpnt = NULL, 2672 .save_datp = 0, 2673 .msgin03 = FALSE, 2674 .sg_num = 0, 2675 .cur_entry = 0, 2676 .sglun = &(data->sg_list[offset]), 2677 .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)), 2678 }; 2679 2680 data->lunt[i][j] = tmp; 2681 } 2682 } 2683 2684 /* 2685 * setup target 2686 */ 2687 for (i = 0; i < ARRAY_SIZE(data->target); i++) { 2688 nsp32_target *target = &(data->target[i]); 2689 2690 target->limit_entry = 0; 2691 target->sync_flag = 0; 2692 nsp32_set_async(data, target); 2693 } 2694 2695 /* 2696 * EEPROM check 2697 */ 2698 ret = nsp32_getprom_param(data); 2699 if (ret == FALSE) { 2700 data->resettime = 3; /* default 3 */ 2701 } 2702 2703 /* 2704 * setup HBA 2705 */ 2706 nsp32hw_init(data); 2707 2708 snprintf(data->info_str, sizeof(data->info_str), 2709 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x", 2710 host->irq, host->io_port, host->n_io_port); 2711 2712 /* 2713 * SCSI bus reset 2714 * 2715 * Note: It's important to reset SCSI bus in initialization phase. 2716 * NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when 2717 * system is coming up, so SCSI devices connected to HBA is set as 2718 * un-asynchronous mode. It brings the merit that this HBA is 2719 * ready to start synchronous transfer without any preparation, 2720 * but we are difficult to control transfer speed. In addition, 2721 * it prevents device transfer speed from effecting EEPROM start-up 2722 * SDTR. NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as 2723 * Auto Mode, then FAST-10M is selected when SCSI devices are 2724 * connected same or more than 4 devices. It should be avoided 2725 * depending on this specification. Thus, resetting the SCSI bus 2726 * restores all connected SCSI devices to asynchronous mode, then 2727 * this driver set SDTR safely later, and we can control all SCSI 2728 * device transfer mode. 2729 */ 2730 nsp32_do_bus_reset(data); 2731 2732 ret = request_irq(host->irq, do_nsp32_isr, IRQF_SHARED, "nsp32", data); 2733 if (ret < 0) { 2734 nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 " 2735 "SCSI PCI controller. Interrupt: %d", host->irq); 2736 goto free_sg_list; 2737 } 2738 2739 /* 2740 * PCI IO register 2741 */ 2742 res = request_region(host->io_port, host->n_io_port, "nsp32"); 2743 if (res == NULL) { 2744 nsp32_msg(KERN_ERR, 2745 "I/O region 0x%lx+0x%lx is already used", 2746 data->BaseAddress, data->NumAddress); 2747 goto free_irq; 2748 } 2749 2750 ret = scsi_add_host(host, &pdev->dev); 2751 if (ret) { 2752 nsp32_msg(KERN_ERR, "failed to add scsi host"); 2753 goto free_region; 2754 } 2755 scsi_scan_host(host); 2756 pci_set_drvdata(pdev, host); 2757 return 0; 2758 2759 free_region: 2760 release_region(host->io_port, host->n_io_port); 2761 2762 free_irq: 2763 free_irq(host->irq, data); 2764 2765 free_sg_list: 2766 pci_free_consistent(pdev, NSP32_SG_TABLE_SIZE, 2767 data->sg_list, data->sg_paddr); 2768 2769 free_autoparam: 2770 pci_free_consistent(pdev, sizeof(nsp32_autoparam), 2771 data->autoparam, data->auto_paddr); 2772 2773 scsi_unregister: 2774 scsi_host_put(host); 2775 2776 err: 2777 return 1; 2778} 2779 2780static int nsp32_release(struct Scsi_Host *host) 2781{ 2782 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 2783 2784 if (data->autoparam) { 2785 pci_free_consistent(data->Pci, sizeof(nsp32_autoparam), 2786 data->autoparam, data->auto_paddr); 2787 } 2788 2789 if (data->sg_list) { 2790 pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE, 2791 data->sg_list, data->sg_paddr); 2792 } 2793 2794 if (host->irq) { 2795 free_irq(host->irq, data); 2796 } 2797 2798 if (host->io_port && host->n_io_port) { 2799 release_region(host->io_port, host->n_io_port); 2800 } 2801 2802 if (data->MmioAddress) { 2803 iounmap(data->MmioAddress); 2804 } 2805 2806 return 0; 2807} 2808 2809static const char *nsp32_info(struct Scsi_Host *shpnt) 2810{ 2811 nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata; 2812 2813 return data->info_str; 2814} 2815 2816 2817/**************************************************************************** 2818 * error handler 2819 */ 2820static int nsp32_eh_abort(struct scsi_cmnd *SCpnt) 2821{ 2822 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2823 unsigned int base = SCpnt->device->host->io_port; 2824 2825 nsp32_msg(KERN_WARNING, "abort"); 2826 2827 if (data->cur_lunt->SCpnt == NULL) { 2828 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed"); 2829 return FAILED; 2830 } 2831 2832 if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) { 2833 /* reset SDTR negotiation */ 2834 data->cur_target->sync_flag = 0; 2835 nsp32_set_async(data, data->cur_target); 2836 } 2837 2838 nsp32_write2(base, TRANSFER_CONTROL, 0); 2839 nsp32_write2(base, BM_CNT, 0); 2840 2841 SCpnt->result = DID_ABORT << 16; 2842 nsp32_scsi_done(SCpnt); 2843 2844 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success"); 2845 return SUCCESS; 2846} 2847 2848static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt) 2849{ 2850 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2851 unsigned int base = SCpnt->device->host->io_port; 2852 2853 spin_lock_irq(SCpnt->device->host->host_lock); 2854 2855 nsp32_msg(KERN_INFO, "Bus Reset"); 2856 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt); 2857 2858 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 2859 nsp32_do_bus_reset(data); 2860 nsp32_write2(base, IRQ_CONTROL, 0); 2861 2862 spin_unlock_irq(SCpnt->device->host->host_lock); 2863 return SUCCESS; /* SCSI bus reset is succeeded at any time. */ 2864} 2865 2866static void nsp32_do_bus_reset(nsp32_hw_data *data) 2867{ 2868 unsigned int base = data->BaseAddress; 2869 unsigned short intrdat; 2870 int i; 2871 2872 nsp32_dbg(NSP32_DEBUG_BUSRESET, "in"); 2873 2874 /* 2875 * stop all transfer 2876 * clear TRANSFERCONTROL_BM_START 2877 * clear counter 2878 */ 2879 nsp32_write2(base, TRANSFER_CONTROL, 0); 2880 nsp32_write4(base, BM_CNT, 0); 2881 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 2882 2883 /* 2884 * fall back to asynchronous transfer mode 2885 * initialize SDTR negotiation flag 2886 */ 2887 for (i = 0; i < ARRAY_SIZE(data->target); i++) { 2888 nsp32_target *target = &data->target[i]; 2889 2890 target->sync_flag = 0; 2891 nsp32_set_async(data, target); 2892 } 2893 2894 /* 2895 * reset SCSI bus 2896 */ 2897 nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST); 2898 mdelay(RESET_HOLD_TIME / 1000); 2899 nsp32_write1(base, SCSI_BUS_CONTROL, 0); 2900 for(i = 0; i < 5; i++) { 2901 intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */ 2902 nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat); 2903 } 2904 2905 data->CurrentSC = NULL; 2906} 2907 2908static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt) 2909{ 2910 struct Scsi_Host *host = SCpnt->device->host; 2911 unsigned int base = SCpnt->device->host->io_port; 2912 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 2913 2914 nsp32_msg(KERN_INFO, "Host Reset"); 2915 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt); 2916 2917 spin_lock_irq(SCpnt->device->host->host_lock); 2918 2919 nsp32hw_init(data); 2920 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 2921 nsp32_do_bus_reset(data); 2922 nsp32_write2(base, IRQ_CONTROL, 0); 2923 2924 spin_unlock_irq(SCpnt->device->host->host_lock); 2925 return SUCCESS; /* Host reset is succeeded at any time. */ 2926} 2927 2928 2929/************************************************************************** 2930 * EEPROM handler 2931 */ 2932 2933/* 2934 * getting EEPROM parameter 2935 */ 2936static int nsp32_getprom_param(nsp32_hw_data *data) 2937{ 2938 int vendor = data->pci_devid->vendor; 2939 int device = data->pci_devid->device; 2940 int ret, val, i; 2941 2942 /* 2943 * EEPROM checking. 2944 */ 2945 ret = nsp32_prom_read(data, 0x7e); 2946 if (ret != 0x55) { 2947 nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret); 2948 return FALSE; 2949 } 2950 ret = nsp32_prom_read(data, 0x7f); 2951 if (ret != 0xaa) { 2952 nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret); 2953 return FALSE; 2954 } 2955 2956 /* 2957 * check EEPROM type 2958 */ 2959 if (vendor == PCI_VENDOR_ID_WORKBIT && 2960 device == PCI_DEVICE_ID_WORKBIT_STANDARD) { 2961 ret = nsp32_getprom_c16(data); 2962 } else if (vendor == PCI_VENDOR_ID_WORKBIT && 2963 device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) { 2964 ret = nsp32_getprom_at24(data); 2965 } else if (vendor == PCI_VENDOR_ID_WORKBIT && 2966 device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) { 2967 ret = nsp32_getprom_at24(data); 2968 } else { 2969 nsp32_msg(KERN_WARNING, "Unknown EEPROM"); 2970 ret = FALSE; 2971 } 2972 2973 /* for debug : SPROM data full checking */ 2974 for (i = 0; i <= 0x1f; i++) { 2975 val = nsp32_prom_read(data, i); 2976 nsp32_dbg(NSP32_DEBUG_EEPROM, 2977 "rom address 0x%x : 0x%x", i, val); 2978 } 2979 2980 return ret; 2981} 2982 2983 2984/* 2985 * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map: 2986 * 2987 * ROMADDR 2988 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6) 2989 * Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M 2990 * 0x07 : HBA Synchronous Transfer Period 2991 * Value 0: AutoSync, 1: Manual Setting 2992 * 0x08 - 0x0f : Not Used? (0x0) 2993 * 0x10 : Bus Termination 2994 * Value 0: Auto[ON], 1: ON, 2: OFF 2995 * 0x11 : Not Used? (0) 2996 * 0x12 : Bus Reset Delay Time (0x03) 2997 * 0x13 : Bootable CD Support 2998 * Value 0: Disable, 1: Enable 2999 * 0x14 : Device Scan 3000 * Bit 7 6 5 4 3 2 1 0 3001 * | <-----------------> 3002 * | SCSI ID: Value 0: Skip, 1: YES 3003 * |-> Value 0: ALL scan, Value 1: Manual 3004 * 0x15 - 0x1b : Not Used? (0) 3005 * 0x1c : Constant? (0x01) (clock div?) 3006 * 0x1d - 0x7c : Not Used (0xff) 3007 * 0x7d : Not Used? (0xff) 3008 * 0x7e : Constant (0x55), Validity signature 3009 * 0x7f : Constant (0xaa), Validity signature 3010 */ 3011static int nsp32_getprom_at24(nsp32_hw_data *data) 3012{ 3013 int ret, i; 3014 int auto_sync; 3015 nsp32_target *target; 3016 int entry; 3017 3018 /* 3019 * Reset time which is designated by EEPROM. 3020 * 3021 * TODO: Not used yet. 3022 */ 3023 data->resettime = nsp32_prom_read(data, 0x12); 3024 3025 /* 3026 * HBA Synchronous Transfer Period 3027 * 3028 * Note: auto_sync = 0: auto, 1: manual. Ninja SCSI HBA spec says 3029 * that if auto_sync is 0 (auto), and connected SCSI devices are 3030 * same or lower than 3, then transfer speed is set as ULTRA-20M. 3031 * On the contrary if connected SCSI devices are same or higher 3032 * than 4, then transfer speed is set as FAST-10M. 3033 * 3034 * I break this rule. The number of connected SCSI devices are 3035 * only ignored. If auto_sync is 0 (auto), then transfer speed is 3036 * forced as ULTRA-20M. 3037 */ 3038 ret = nsp32_prom_read(data, 0x07); 3039 switch (ret) { 3040 case 0: 3041 auto_sync = TRUE; 3042 break; 3043 case 1: 3044 auto_sync = FALSE; 3045 break; 3046 default: 3047 nsp32_msg(KERN_WARNING, 3048 "Unsupported Auto Sync mode. Fall back to manual mode."); 3049 auto_sync = TRUE; 3050 } 3051 3052 if (trans_mode == ULTRA20M_MODE) { 3053 auto_sync = TRUE; 3054 } 3055 3056 /* 3057 * each device Synchronous Transfer Period 3058 */ 3059 for (i = 0; i < NSP32_HOST_SCSIID; i++) { 3060 target = &data->target[i]; 3061 if (auto_sync == TRUE) { 3062 target->limit_entry = 0; /* set as ULTRA20M */ 3063 } else { 3064 ret = nsp32_prom_read(data, i); 3065 entry = nsp32_search_period_entry(data, target, ret); 3066 if (entry < 0) { 3067 /* search failed... set maximum speed */ 3068 entry = 0; 3069 } 3070 target->limit_entry = entry; 3071 } 3072 } 3073 3074 return TRUE; 3075} 3076 3077 3078/* 3079 * C16 110 (I-O Data: SC-NBD) data map: 3080 * 3081 * ROMADDR 3082 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6) 3083 * Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC 3084 * 0x07 : 0 (HBA Synchronous Transfer Period: Auto Sync) 3085 * 0x08 - 0x0f : Not Used? (0x0) 3086 * 0x10 : Transfer Mode 3087 * Value 0: PIO, 1: Busmater 3088 * 0x11 : Bus Reset Delay Time (0x00-0x20) 3089 * 0x12 : Bus Termination 3090 * Value 0: Disable, 1: Enable 3091 * 0x13 - 0x19 : Disconnection 3092 * Value 0: Disable, 1: Enable 3093 * 0x1a - 0x7c : Not Used? (0) 3094 * 0x7d : Not Used? (0xf8) 3095 * 0x7e : Constant (0x55), Validity signature 3096 * 0x7f : Constant (0xaa), Validity signature 3097 */ 3098static int nsp32_getprom_c16(nsp32_hw_data *data) 3099{ 3100 int ret, i; 3101 nsp32_target *target; 3102 int entry, val; 3103 3104 /* 3105 * Reset time which is designated by EEPROM. 3106 * 3107 * TODO: Not used yet. 3108 */ 3109 data->resettime = nsp32_prom_read(data, 0x11); 3110 3111 /* 3112 * each device Synchronous Transfer Period 3113 */ 3114 for (i = 0; i < NSP32_HOST_SCSIID; i++) { 3115 target = &data->target[i]; 3116 ret = nsp32_prom_read(data, i); 3117 switch (ret) { 3118 case 0: /* 20MB/s */ 3119 val = 0x0c; 3120 break; 3121 case 1: /* 10MB/s */ 3122 val = 0x19; 3123 break; 3124 case 2: /* 5MB/s */ 3125 val = 0x32; 3126 break; 3127 case 3: /* ASYNC */ 3128 val = 0x00; 3129 break; 3130 default: /* default 20MB/s */ 3131 val = 0x0c; 3132 break; 3133 } 3134 entry = nsp32_search_period_entry(data, target, val); 3135 if (entry < 0 || trans_mode == ULTRA20M_MODE) { 3136 /* search failed... set maximum speed */ 3137 entry = 0; 3138 } 3139 target->limit_entry = entry; 3140 } 3141 3142 return TRUE; 3143} 3144 3145 3146/* 3147 * Atmel AT24C01A (drived in 5V) serial EEPROM routines 3148 */ 3149static int nsp32_prom_read(nsp32_hw_data *data, int romaddr) 3150{ 3151 int i, val; 3152 3153 /* start condition */ 3154 nsp32_prom_start(data); 3155 3156 /* device address */ 3157 nsp32_prom_write_bit(data, 1); /* 1 */ 3158 nsp32_prom_write_bit(data, 0); /* 0 */ 3159 nsp32_prom_write_bit(data, 1); /* 1 */ 3160 nsp32_prom_write_bit(data, 0); /* 0 */ 3161 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */ 3162 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */ 3163 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */ 3164 3165 /* R/W: W for dummy write */ 3166 nsp32_prom_write_bit(data, 0); 3167 3168 /* ack */ 3169 nsp32_prom_write_bit(data, 0); 3170 3171 /* word address */ 3172 for (i = 7; i >= 0; i--) { 3173 nsp32_prom_write_bit(data, ((romaddr >> i) & 1)); 3174 } 3175 3176 /* ack */ 3177 nsp32_prom_write_bit(data, 0); 3178 3179 /* start condition */ 3180 nsp32_prom_start(data); 3181 3182 /* device address */ 3183 nsp32_prom_write_bit(data, 1); /* 1 */ 3184 nsp32_prom_write_bit(data, 0); /* 0 */ 3185 nsp32_prom_write_bit(data, 1); /* 1 */ 3186 nsp32_prom_write_bit(data, 0); /* 0 */ 3187 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */ 3188 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */ 3189 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */ 3190 3191 /* R/W: R */ 3192 nsp32_prom_write_bit(data, 1); 3193 3194 /* ack */ 3195 nsp32_prom_write_bit(data, 0); 3196 3197 /* data... */ 3198 val = 0; 3199 for (i = 7; i >= 0; i--) { 3200 val += (nsp32_prom_read_bit(data) << i); 3201 } 3202 3203 /* no ack */ 3204 nsp32_prom_write_bit(data, 1); 3205 3206 /* stop condition */ 3207 nsp32_prom_stop(data); 3208 3209 return val; 3210} 3211 3212static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val) 3213{ 3214 int base = data->BaseAddress; 3215 int tmp; 3216 3217 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL); 3218 3219 if (val == 0) { 3220 tmp &= ~bit; 3221 } else { 3222 tmp |= bit; 3223 } 3224 3225 nsp32_index_write1(base, SERIAL_ROM_CTL, tmp); 3226 3227 udelay(10); 3228} 3229 3230static int nsp32_prom_get(nsp32_hw_data *data, int bit) 3231{ 3232 int base = data->BaseAddress; 3233 int tmp, ret; 3234 3235 if (bit != SDA) { 3236 nsp32_msg(KERN_ERR, "return value is not appropriate"); 3237 return 0; 3238 } 3239 3240 3241 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit; 3242 3243 if (tmp == 0) { 3244 ret = 0; 3245 } else { 3246 ret = 1; 3247 } 3248 3249 udelay(10); 3250 3251 return ret; 3252} 3253 3254static void nsp32_prom_start (nsp32_hw_data *data) 3255{ 3256 /* start condition */ 3257 nsp32_prom_set(data, SCL, 1); 3258 nsp32_prom_set(data, SDA, 1); 3259 nsp32_prom_set(data, ENA, 1); /* output mode */ 3260 nsp32_prom_set(data, SDA, 0); /* keeping SCL=1 and transiting 3261 * SDA 1->0 is start condition */ 3262 nsp32_prom_set(data, SCL, 0); 3263} 3264 3265static void nsp32_prom_stop (nsp32_hw_data *data) 3266{ 3267 /* stop condition */ 3268 nsp32_prom_set(data, SCL, 1); 3269 nsp32_prom_set(data, SDA, 0); 3270 nsp32_prom_set(data, ENA, 1); /* output mode */ 3271 nsp32_prom_set(data, SDA, 1); 3272 nsp32_prom_set(data, SCL, 0); 3273} 3274 3275static void nsp32_prom_write_bit(nsp32_hw_data *data, int val) 3276{ 3277 /* write */ 3278 nsp32_prom_set(data, SDA, val); 3279 nsp32_prom_set(data, SCL, 1 ); 3280 nsp32_prom_set(data, SCL, 0 ); 3281} 3282 3283static int nsp32_prom_read_bit(nsp32_hw_data *data) 3284{ 3285 int val; 3286 3287 /* read */ 3288 nsp32_prom_set(data, ENA, 0); /* input mode */ 3289 nsp32_prom_set(data, SCL, 1); 3290 3291 val = nsp32_prom_get(data, SDA); 3292 3293 nsp32_prom_set(data, SCL, 0); 3294 nsp32_prom_set(data, ENA, 1); /* output mode */ 3295 3296 return val; 3297} 3298 3299 3300/************************************************************************** 3301 * Power Management 3302 */ 3303#ifdef CONFIG_PM 3304 3305/* Device suspended */ 3306static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state) 3307{ 3308 struct Scsi_Host *host = pci_get_drvdata(pdev); 3309 3310 nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host); 3311 3312 pci_save_state (pdev); 3313 pci_disable_device (pdev); 3314 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 3315 3316 return 0; 3317} 3318 3319/* Device woken up */ 3320static int nsp32_resume(struct pci_dev *pdev) 3321{ 3322 struct Scsi_Host *host = pci_get_drvdata(pdev); 3323 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 3324 unsigned short reg; 3325 3326 nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host); 3327 3328 pci_set_power_state(pdev, PCI_D0); 3329 pci_enable_wake (pdev, PCI_D0, 0); 3330 pci_restore_state (pdev); 3331 3332 reg = nsp32_read2(data->BaseAddress, INDEX_REG); 3333 3334 nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg); 3335 3336 if (reg == 0xffff) { 3337 nsp32_msg(KERN_INFO, "missing device. abort resume."); 3338 return 0; 3339 } 3340 3341 nsp32hw_init (data); 3342 nsp32_do_bus_reset(data); 3343 3344 nsp32_msg(KERN_INFO, "resume success"); 3345 3346 return 0; 3347} 3348 3349#endif 3350 3351/************************************************************************ 3352 * PCI/Cardbus probe/remove routine 3353 */ 3354static int nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id) 3355{ 3356 int ret; 3357 nsp32_hw_data *data = &nsp32_data_base; 3358 3359 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 3360 3361 ret = pci_enable_device(pdev); 3362 if (ret) { 3363 nsp32_msg(KERN_ERR, "failed to enable pci device"); 3364 return ret; 3365 } 3366 3367 data->Pci = pdev; 3368 data->pci_devid = id; 3369 data->IrqNumber = pdev->irq; 3370 data->BaseAddress = pci_resource_start(pdev, 0); 3371 data->NumAddress = pci_resource_len (pdev, 0); 3372 data->MmioAddress = pci_ioremap_bar(pdev, 1); 3373 data->MmioLength = pci_resource_len (pdev, 1); 3374 3375 pci_set_master(pdev); 3376 3377 ret = nsp32_detect(pdev); 3378 3379 nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s", 3380 pdev->irq, 3381 data->MmioAddress, data->MmioLength, 3382 pci_name(pdev), 3383 nsp32_model[id->driver_data]); 3384 3385 nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret); 3386 3387 return ret; 3388} 3389 3390static void nsp32_remove(struct pci_dev *pdev) 3391{ 3392 struct Scsi_Host *host = pci_get_drvdata(pdev); 3393 3394 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 3395 3396 scsi_remove_host(host); 3397 3398 nsp32_release(host); 3399 3400 scsi_host_put(host); 3401} 3402 3403static struct pci_driver nsp32_driver = { 3404 .name = "nsp32", 3405 .id_table = nsp32_pci_table, 3406 .probe = nsp32_probe, 3407 .remove = nsp32_remove, 3408#ifdef CONFIG_PM 3409 .suspend = nsp32_suspend, 3410 .resume = nsp32_resume, 3411#endif 3412}; 3413 3414/********************************************************************* 3415 * Moule entry point 3416 */ 3417static int __init init_nsp32(void) { 3418 nsp32_msg(KERN_INFO, "loading..."); 3419 return pci_register_driver(&nsp32_driver); 3420} 3421 3422static void __exit exit_nsp32(void) { 3423 nsp32_msg(KERN_INFO, "unloading..."); 3424 pci_unregister_driver(&nsp32_driver); 3425} 3426 3427module_init(init_nsp32); 3428module_exit(exit_nsp32); 3429 3430/* end */ 3431