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 .cmd_per_lun = 1, 278 .this_id = NSP32_HOST_SCSIID, 279 .use_clustering = DISABLE_CLUSTERING, 280 .eh_abort_handler = nsp32_eh_abort, 281 .eh_bus_reset_handler = nsp32_eh_bus_reset, 282 .eh_host_reset_handler = nsp32_eh_host_reset, 283/* .highmem_io = 1, */ 284}; 285 286#include "nsp32_io.h" 287 288/*********************************************************************** 289 * debug, error print 290 */ 291#ifndef NSP32_DEBUG 292# define NSP32_DEBUG_MASK 0x000000 293# define nsp32_msg(type, args...) nsp32_message ("", 0, (type), args) 294# define nsp32_dbg(mask, args...) /* */ 295#else 296# define NSP32_DEBUG_MASK 0xffffff 297# define nsp32_msg(type, args...) \ 298 nsp32_message (__func__, __LINE__, (type), args) 299# define nsp32_dbg(mask, args...) \ 300 nsp32_dmessage(__func__, __LINE__, (mask), args) 301#endif 302 303#define NSP32_DEBUG_QUEUECOMMAND BIT(0) 304#define NSP32_DEBUG_REGISTER BIT(1) 305#define NSP32_DEBUG_AUTOSCSI BIT(2) 306#define NSP32_DEBUG_INTR BIT(3) 307#define NSP32_DEBUG_SGLIST BIT(4) 308#define NSP32_DEBUG_BUSFREE BIT(5) 309#define NSP32_DEBUG_CDB_CONTENTS BIT(6) 310#define NSP32_DEBUG_RESELECTION BIT(7) 311#define NSP32_DEBUG_MSGINOCCUR BIT(8) 312#define NSP32_DEBUG_EEPROM BIT(9) 313#define NSP32_DEBUG_MSGOUTOCCUR BIT(10) 314#define NSP32_DEBUG_BUSRESET BIT(11) 315#define NSP32_DEBUG_RESTART BIT(12) 316#define NSP32_DEBUG_SYNC BIT(13) 317#define NSP32_DEBUG_WAIT BIT(14) 318#define NSP32_DEBUG_TARGETFLAG BIT(15) 319#define NSP32_DEBUG_PROC BIT(16) 320#define NSP32_DEBUG_INIT BIT(17) 321#define NSP32_SPECIAL_PRINT_REGISTER BIT(20) 322 323#define NSP32_DEBUG_BUF_LEN 100 324 325static void nsp32_message(const char *func, int line, char *type, char *fmt, ...) 326{ 327 va_list args; 328 char buf[NSP32_DEBUG_BUF_LEN]; 329 330 va_start(args, fmt); 331 vsnprintf(buf, sizeof(buf), fmt, args); 332 va_end(args); 333 334#ifndef NSP32_DEBUG 335 printk("%snsp32: %s\n", type, buf); 336#else 337 printk("%snsp32: %s (%d): %s\n", type, func, line, buf); 338#endif 339} 340 341#ifdef NSP32_DEBUG 342static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...) 343{ 344 va_list args; 345 char buf[NSP32_DEBUG_BUF_LEN]; 346 347 va_start(args, fmt); 348 vsnprintf(buf, sizeof(buf), fmt, args); 349 va_end(args); 350 351 if (mask & NSP32_DEBUG_MASK) { 352 printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf); 353 } 354} 355#endif 356 357#ifdef NSP32_DEBUG 358# include "nsp32_debug.c" 359#else 360# define show_command(arg) /* */ 361# define show_busphase(arg) /* */ 362# define show_autophase(arg) /* */ 363#endif 364 365/* 366 * IDENTIFY Message 367 */ 368static void nsp32_build_identify(struct scsi_cmnd *SCpnt) 369{ 370 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 371 int pos = data->msgout_len; 372 int mode = FALSE; 373 374 /* XXX: Auto DiscPriv detection is progressing... */ 375 if (disc_priv == 0) { 376 /* mode = TRUE; */ 377 } 378 379 data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++; 380 381 data->msgout_len = pos; 382} 383 384/* 385 * SDTR Message Routine 386 */ 387static void nsp32_build_sdtr(struct scsi_cmnd *SCpnt, 388 unsigned char period, 389 unsigned char offset) 390{ 391 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 392 int pos = data->msgout_len; 393 394 data->msgoutbuf[pos] = EXTENDED_MESSAGE; pos++; 395 data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++; 396 data->msgoutbuf[pos] = EXTENDED_SDTR; pos++; 397 data->msgoutbuf[pos] = period; pos++; 398 data->msgoutbuf[pos] = offset; pos++; 399 400 data->msgout_len = pos; 401} 402 403/* 404 * No Operation Message 405 */ 406static void nsp32_build_nop(struct scsi_cmnd *SCpnt) 407{ 408 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 409 int pos = data->msgout_len; 410 411 if (pos != 0) { 412 nsp32_msg(KERN_WARNING, 413 "Some messages are already contained!"); 414 return; 415 } 416 417 data->msgoutbuf[pos] = NOP; pos++; 418 data->msgout_len = pos; 419} 420 421/* 422 * Reject Message 423 */ 424static void nsp32_build_reject(struct scsi_cmnd *SCpnt) 425{ 426 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 427 int pos = data->msgout_len; 428 429 data->msgoutbuf[pos] = MESSAGE_REJECT; pos++; 430 data->msgout_len = pos; 431} 432 433/* 434 * timer 435 */ 436#if 0 437static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time) 438{ 439 unsigned int base = SCpnt->host->io_port; 440 441 nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time); 442 443 if (time & (~TIMER_CNT_MASK)) { 444 nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow"); 445 } 446 447 nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK); 448} 449#endif 450 451 452/* 453 * set SCSI command and other parameter to asic, and start selection phase 454 */ 455static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt) 456{ 457 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 458 unsigned int base = SCpnt->device->host->io_port; 459 unsigned int host_id = SCpnt->device->host->this_id; 460 unsigned char target = scmd_id(SCpnt); 461 nsp32_autoparam *param = data->autoparam; 462 unsigned char phase; 463 int i, ret; 464 unsigned int msgout; 465 u16_le s; 466 467 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in"); 468 469 /* 470 * check bus free 471 */ 472 phase = nsp32_read1(base, SCSI_BUS_MONITOR); 473 if (phase != BUSMON_BUS_FREE) { 474 nsp32_msg(KERN_WARNING, "bus busy"); 475 show_busphase(phase & BUSMON_PHASE_MASK); 476 SCpnt->result = DID_BUS_BUSY << 16; 477 return FALSE; 478 } 479 480 /* 481 * message out 482 * 483 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout. 484 * over 3 messages needs another routine. 485 */ 486 if (data->msgout_len == 0) { 487 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!"); 488 SCpnt->result = DID_ERROR << 16; 489 return FALSE; 490 } else if (data->msgout_len > 0 && data->msgout_len <= 3) { 491 msgout = 0; 492 for (i = 0; i < data->msgout_len; i++) { 493 /* 494 * the sending order of the message is: 495 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2 496 * MCNT 2: MSG#1 -> MSG#2 497 * MCNT 1: MSG#2 498 */ 499 msgout >>= 8; 500 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24); 501 } 502 msgout |= MV_VALID; /* MV valid */ 503 msgout |= (unsigned int)data->msgout_len; /* len */ 504 } else { 505 /* data->msgout_len > 3 */ 506 msgout = 0; 507 } 508 509 // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT)); 510 // nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME); 511 512 /* 513 * setup asic parameter 514 */ 515 memset(param, 0, sizeof(nsp32_autoparam)); 516 517 /* cdb */ 518 for (i = 0; i < SCpnt->cmd_len; i++) { 519 param->cdb[4 * i] = SCpnt->cmnd[i]; 520 } 521 522 /* outgoing messages */ 523 param->msgout = cpu_to_le32(msgout); 524 525 /* syncreg, ackwidth, target id, SREQ sampling rate */ 526 param->syncreg = data->cur_target->syncreg; 527 param->ackwidth = data->cur_target->ackwidth; 528 param->target_id = BIT(host_id) | BIT(target); 529 param->sample_reg = data->cur_target->sample_reg; 530 531 // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg); 532 533 /* command control */ 534 param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER | 535 AUTOSCSI_START | 536 AUTO_MSGIN_00_OR_04 | 537 AUTO_MSGIN_02 | 538 AUTO_ATN ); 539 540 541 /* transfer control */ 542 s = 0; 543 switch (data->trans_method) { 544 case NSP32_TRANSFER_BUSMASTER: 545 s |= BM_START; 546 break; 547 case NSP32_TRANSFER_MMIO: 548 s |= CB_MMIO_MODE; 549 break; 550 case NSP32_TRANSFER_PIO: 551 s |= CB_IO_MODE; 552 break; 553 default: 554 nsp32_msg(KERN_ERR, "unknown trans_method"); 555 break; 556 } 557 /* 558 * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits. 559 * For bus master transfer, it's taken off. 560 */ 561 s |= (TRANSFER_GO | ALL_COUNTER_CLR); 562 param->transfer_control = cpu_to_le16(s); 563 564 /* sg table addr */ 565 param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr); 566 567 /* 568 * transfer parameter to ASIC 569 */ 570 nsp32_write4(base, SGT_ADR, data->auto_paddr); 571 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER | 572 AUTO_PARAMETER ); 573 574 /* 575 * Check arbitration 576 */ 577 ret = nsp32_arbitration(SCpnt, base); 578 579 return ret; 580} 581 582 583/* 584 * Selection with AUTO SCSI (without AUTO PARAMETER) 585 */ 586static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt) 587{ 588 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 589 unsigned int base = SCpnt->device->host->io_port; 590 unsigned int host_id = SCpnt->device->host->this_id; 591 unsigned char target = scmd_id(SCpnt); 592 unsigned char phase; 593 int status; 594 unsigned short command = 0; 595 unsigned int msgout = 0; 596 unsigned short execph; 597 int i; 598 599 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in"); 600 601 /* 602 * IRQ disable 603 */ 604 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 605 606 /* 607 * check bus line 608 */ 609 phase = nsp32_read1(base, SCSI_BUS_MONITOR); 610 if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) { 611 nsp32_msg(KERN_WARNING, "bus busy"); 612 SCpnt->result = DID_BUS_BUSY << 16; 613 status = 1; 614 goto out; 615 } 616 617 /* 618 * clear execph 619 */ 620 execph = nsp32_read2(base, SCSI_EXECUTE_PHASE); 621 622 /* 623 * clear FIFO counter to set CDBs 624 */ 625 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER); 626 627 /* 628 * set CDB0 - CDB15 629 */ 630 for (i = 0; i < SCpnt->cmd_len; i++) { 631 nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]); 632 } 633 nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]); 634 635 /* 636 * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID 637 */ 638 nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target)); 639 640 /* 641 * set SCSI MSGOUT REG 642 * 643 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout. 644 * over 3 messages needs another routine. 645 */ 646 if (data->msgout_len == 0) { 647 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!"); 648 SCpnt->result = DID_ERROR << 16; 649 status = 1; 650 goto out; 651 } else if (data->msgout_len > 0 && data->msgout_len <= 3) { 652 msgout = 0; 653 for (i = 0; i < data->msgout_len; i++) { 654 /* 655 * the sending order of the message is: 656 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2 657 * MCNT 2: MSG#1 -> MSG#2 658 * MCNT 1: MSG#2 659 */ 660 msgout >>= 8; 661 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24); 662 } 663 msgout |= MV_VALID; /* MV valid */ 664 msgout |= (unsigned int)data->msgout_len; /* len */ 665 nsp32_write4(base, SCSI_MSG_OUT, msgout); 666 } else { 667 /* data->msgout_len > 3 */ 668 nsp32_write4(base, SCSI_MSG_OUT, 0); 669 } 670 671 /* 672 * set selection timeout(= 250ms) 673 */ 674 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME); 675 676 /* 677 * set SREQ hazard killer sampling rate 678 * 679 * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz. 680 * check other internal clock! 681 */ 682 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg); 683 684 /* 685 * clear Arbit 686 */ 687 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR); 688 689 /* 690 * set SYNCREG 691 * Don't set BM_START_ADR before setting this register. 692 */ 693 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg); 694 695 /* 696 * set ACKWIDTH 697 */ 698 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth); 699 700 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, 701 "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x", 702 nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH), 703 nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID)); 704 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x", 705 data->msgout_len, msgout); 706 707 /* 708 * set SGT ADDR (physical address) 709 */ 710 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr); 711 712 /* 713 * set TRANSFER CONTROL REG 714 */ 715 command = 0; 716 command |= (TRANSFER_GO | ALL_COUNTER_CLR); 717 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 718 if (scsi_bufflen(SCpnt) > 0) { 719 command |= BM_START; 720 } 721 } else if (data->trans_method & NSP32_TRANSFER_MMIO) { 722 command |= CB_MMIO_MODE; 723 } else if (data->trans_method & NSP32_TRANSFER_PIO) { 724 command |= CB_IO_MODE; 725 } 726 nsp32_write2(base, TRANSFER_CONTROL, command); 727 728 /* 729 * start AUTO SCSI, kick off arbitration 730 */ 731 command = (CLEAR_CDB_FIFO_POINTER | 732 AUTOSCSI_START | 733 AUTO_MSGIN_00_OR_04 | 734 AUTO_MSGIN_02 | 735 AUTO_ATN ); 736 nsp32_write2(base, COMMAND_CONTROL, command); 737 738 /* 739 * Check arbitration 740 */ 741 status = nsp32_arbitration(SCpnt, base); 742 743 out: 744 /* 745 * IRQ enable 746 */ 747 nsp32_write2(base, IRQ_CONTROL, 0); 748 749 return status; 750} 751 752 753/* 754 * Arbitration Status Check 755 * 756 * Note: Arbitration counter is waited during ARBIT_GO is not lifting. 757 * Using udelay(1) consumes CPU time and system time, but 758 * arbitration delay time is defined minimal 2.4us in SCSI 759 * specification, thus udelay works as coarse grained wait timer. 760 */ 761static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base) 762{ 763 unsigned char arbit; 764 int status = TRUE; 765 int time = 0; 766 767 do { 768 arbit = nsp32_read1(base, ARBIT_STATUS); 769 time++; 770 } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 && 771 (time <= ARBIT_TIMEOUT_TIME)); 772 773 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, 774 "arbit: 0x%x, delay time: %d", arbit, time); 775 776 if (arbit & ARBIT_WIN) { 777 /* Arbitration succeeded */ 778 SCpnt->result = DID_OK << 16; 779 nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */ 780 } else if (arbit & ARBIT_FAIL) { 781 /* Arbitration failed */ 782 SCpnt->result = DID_BUS_BUSY << 16; 783 status = FALSE; 784 } else { 785 /* 786 * unknown error or ARBIT_GO timeout, 787 * something lock up! guess no connection. 788 */ 789 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout"); 790 SCpnt->result = DID_NO_CONNECT << 16; 791 status = FALSE; 792 } 793 794 /* 795 * clear Arbit 796 */ 797 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR); 798 799 return status; 800} 801 802 803/* 804 * reselection 805 * 806 * Note: This reselection routine is called from msgin_occur, 807 * reselection target id&lun must be already set. 808 * SCSI-2 says IDENTIFY implies RESTORE_POINTER operation. 809 */ 810static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun) 811{ 812 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 813 unsigned int host_id = SCpnt->device->host->this_id; 814 unsigned int base = SCpnt->device->host->io_port; 815 unsigned char tmpid, newid; 816 817 nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter"); 818 819 /* 820 * calculate reselected SCSI ID 821 */ 822 tmpid = nsp32_read1(base, RESELECT_ID); 823 tmpid &= (~BIT(host_id)); 824 newid = 0; 825 while (tmpid) { 826 if (tmpid & 1) { 827 break; 828 } 829 tmpid >>= 1; 830 newid++; 831 } 832 833 /* 834 * If reselected New ID:LUN is not existed 835 * or current nexus is not existed, unexpected 836 * reselection is occurred. Send reject message. 837 */ 838 if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) { 839 nsp32_msg(KERN_WARNING, "unknown id/lun"); 840 return FALSE; 841 } else if(data->lunt[newid][newlun].SCpnt == NULL) { 842 nsp32_msg(KERN_WARNING, "no SCSI command is processing"); 843 return FALSE; 844 } 845 846 data->cur_id = newid; 847 data->cur_lun = newlun; 848 data->cur_target = &(data->target[newid]); 849 data->cur_lunt = &(data->lunt[newid][newlun]); 850 851 /* reset SACK/SavedACK counter (or ALL clear?) */ 852 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 853 854 return TRUE; 855} 856 857 858/* 859 * nsp32_setup_sg_table - build scatter gather list for transfer data 860 * with bus master. 861 * 862 * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time. 863 */ 864static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt) 865{ 866 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 867 struct scatterlist *sg; 868 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt; 869 int num, i; 870 u32_le l; 871 872 if (sgt == NULL) { 873 nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null"); 874 return FALSE; 875 } 876 877 num = scsi_dma_map(SCpnt); 878 if (!num) 879 return TRUE; 880 else if (num < 0) 881 return FALSE; 882 else { 883 scsi_for_each_sg(SCpnt, sg, num, i) { 884 /* 885 * Build nsp32_sglist, substitute sg dma addresses. 886 */ 887 sgt[i].addr = cpu_to_le32(sg_dma_address(sg)); 888 sgt[i].len = cpu_to_le32(sg_dma_len(sg)); 889 890 if (le32_to_cpu(sgt[i].len) > 0x10000) { 891 nsp32_msg(KERN_ERR, 892 "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len)); 893 return FALSE; 894 } 895 nsp32_dbg(NSP32_DEBUG_SGLIST, 896 "num 0x%x : addr 0x%lx len 0x%lx", 897 i, 898 le32_to_cpu(sgt[i].addr), 899 le32_to_cpu(sgt[i].len )); 900 } 901 902 /* set end mark */ 903 l = le32_to_cpu(sgt[num-1].len); 904 sgt[num-1].len = cpu_to_le32(l | SGTEND); 905 } 906 907 return TRUE; 908} 909 910static int nsp32_queuecommand_lck(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *)) 911{ 912 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 913 nsp32_target *target; 914 nsp32_lunt *cur_lunt; 915 int ret; 916 917 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 918 "enter. target: 0x%x LUN: 0x%llx cmnd: 0x%x cmndlen: 0x%x " 919 "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x", 920 SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len, 921 scsi_sg_count(SCpnt), scsi_sglist(SCpnt), scsi_bufflen(SCpnt)); 922 923 if (data->CurrentSC != NULL) { 924 nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request"); 925 data->CurrentSC = NULL; 926 SCpnt->result = DID_NO_CONNECT << 16; 927 done(SCpnt); 928 return 0; 929 } 930 931 /* check target ID is not same as this initiator ID */ 932 if (scmd_id(SCpnt) == SCpnt->device->host->this_id) { 933 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "target==host???"); 934 SCpnt->result = DID_BAD_TARGET << 16; 935 done(SCpnt); 936 return 0; 937 } 938 939 /* check target LUN is allowable value */ 940 if (SCpnt->device->lun >= MAX_LUN) { 941 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun"); 942 SCpnt->result = DID_BAD_TARGET << 16; 943 done(SCpnt); 944 return 0; 945 } 946 947 show_command(SCpnt); 948 949 SCpnt->scsi_done = done; 950 data->CurrentSC = SCpnt; 951 SCpnt->SCp.Status = CHECK_CONDITION; 952 SCpnt->SCp.Message = 0; 953 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt)); 954 955 SCpnt->SCp.ptr = (char *)scsi_sglist(SCpnt); 956 SCpnt->SCp.this_residual = scsi_bufflen(SCpnt); 957 SCpnt->SCp.buffer = NULL; 958 SCpnt->SCp.buffers_residual = 0; 959 960 /* initialize data */ 961 data->msgout_len = 0; 962 data->msgin_len = 0; 963 cur_lunt = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]); 964 cur_lunt->SCpnt = SCpnt; 965 cur_lunt->save_datp = 0; 966 cur_lunt->msgin03 = FALSE; 967 data->cur_lunt = cur_lunt; 968 data->cur_id = SCpnt->device->id; 969 data->cur_lun = SCpnt->device->lun; 970 971 ret = nsp32_setup_sg_table(SCpnt); 972 if (ret == FALSE) { 973 nsp32_msg(KERN_ERR, "SGT fail"); 974 SCpnt->result = DID_ERROR << 16; 975 nsp32_scsi_done(SCpnt); 976 return 0; 977 } 978 979 /* Build IDENTIFY */ 980 nsp32_build_identify(SCpnt); 981 982 /* 983 * If target is the first time to transfer after the reset 984 * (target don't have SDTR_DONE and SDTR_INITIATOR), sync 985 * message SDTR is needed to do synchronous transfer. 986 */ 987 target = &data->target[scmd_id(SCpnt)]; 988 data->cur_target = target; 989 990 if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) { 991 unsigned char period, offset; 992 993 if (trans_mode != ASYNC_MODE) { 994 nsp32_set_max_sync(data, target, &period, &offset); 995 nsp32_build_sdtr(SCpnt, period, offset); 996 target->sync_flag |= SDTR_INITIATOR; 997 } else { 998 nsp32_set_async(data, target); 999 target->sync_flag |= SDTR_DONE; 1000 } 1001 1002 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 1003 "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n", 1004 target->limit_entry, period, offset); 1005 } else if (target->sync_flag & SDTR_INITIATOR) { 1006 /* 1007 * It was negotiating SDTR with target, sending from the 1008 * initiator, but there are no chance to remove this flag. 1009 * Set async because we don't get proper negotiation. 1010 */ 1011 nsp32_set_async(data, target); 1012 target->sync_flag &= ~SDTR_INITIATOR; 1013 target->sync_flag |= SDTR_DONE; 1014 1015 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 1016 "SDTR_INITIATOR: fall back to async"); 1017 } else if (target->sync_flag & SDTR_TARGET) { 1018 /* 1019 * It was negotiating SDTR with target, sending from target, 1020 * but there are no chance to remove this flag. Set async 1021 * because we don't get proper negotiation. 1022 */ 1023 nsp32_set_async(data, target); 1024 target->sync_flag &= ~SDTR_TARGET; 1025 target->sync_flag |= SDTR_DONE; 1026 1027 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, 1028 "Unknown SDTR from target is reached, fall back to async."); 1029 } 1030 1031 nsp32_dbg(NSP32_DEBUG_TARGETFLAG, 1032 "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x", 1033 SCpnt->device->id, target->sync_flag, target->syncreg, 1034 target->ackwidth); 1035 1036 /* Selection */ 1037 if (auto_param == 0) { 1038 ret = nsp32_selection_autopara(SCpnt); 1039 } else { 1040 ret = nsp32_selection_autoscsi(SCpnt); 1041 } 1042 1043 if (ret != TRUE) { 1044 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail"); 1045 nsp32_scsi_done(SCpnt); 1046 } 1047 1048 return 0; 1049} 1050 1051static DEF_SCSI_QCMD(nsp32_queuecommand) 1052 1053/* initialize asic */ 1054static int nsp32hw_init(nsp32_hw_data *data) 1055{ 1056 unsigned int base = data->BaseAddress; 1057 unsigned short irq_stat; 1058 unsigned long lc_reg; 1059 unsigned char power; 1060 1061 lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE); 1062 if ((lc_reg & 0xff00) == 0) { 1063 lc_reg |= (0x20 << 8); 1064 nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff); 1065 } 1066 1067 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 1068 nsp32_write2(base, TRANSFER_CONTROL, 0); 1069 nsp32_write4(base, BM_CNT, 0); 1070 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0); 1071 1072 do { 1073 irq_stat = nsp32_read2(base, IRQ_STATUS); 1074 nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat); 1075 } while (irq_stat & IRQSTATUS_ANY_IRQ); 1076 1077 /* 1078 * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is 1079 * designated by specification. 1080 */ 1081 if ((data->trans_method & NSP32_TRANSFER_PIO) || 1082 (data->trans_method & NSP32_TRANSFER_MMIO)) { 1083 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x40); 1084 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40); 1085 } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 1086 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x10); 1087 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60); 1088 } else { 1089 nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode"); 1090 } 1091 1092 nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x", 1093 nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT), 1094 nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT)); 1095 1096 nsp32_index_write1(base, CLOCK_DIV, data->clock); 1097 nsp32_index_write1(base, BM_CYCLE, MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD); 1098 nsp32_write1(base, PARITY_CONTROL, 0); /* parity check is disable */ 1099 1100 /* 1101 * initialize MISC_WRRD register 1102 * 1103 * Note: Designated parameters is obeyed as following: 1104 * MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set. 1105 * MISC_MASTER_TERMINATION_SELECT: It must be set. 1106 * MISC_BMREQ_NEGATE_TIMING_SEL: It should be set. 1107 * MISC_AUTOSEL_TIMING_SEL: It should be set. 1108 * MISC_BMSTOP_CHANGE2_NONDATA_PHASE: It should be set. 1109 * MISC_DELAYED_BMSTART: It's selected for safety. 1110 * 1111 * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then 1112 * we have to set TRANSFERCONTROL_BM_START as 0 and set 1113 * appropriate value before restarting bus master transfer. 1114 */ 1115 nsp32_index_write2(base, MISC_WR, 1116 (SCSI_DIRECTION_DETECTOR_SELECT | 1117 DELAYED_BMSTART | 1118 MASTER_TERMINATION_SELECT | 1119 BMREQ_NEGATE_TIMING_SEL | 1120 AUTOSEL_TIMING_SEL | 1121 BMSTOP_CHANGE2_NONDATA_PHASE)); 1122 1123 nsp32_index_write1(base, TERM_PWR_CONTROL, 0); 1124 power = nsp32_index_read1(base, TERM_PWR_CONTROL); 1125 if (!(power & SENSE)) { 1126 nsp32_msg(KERN_INFO, "term power on"); 1127 nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR); 1128 } 1129 1130 nsp32_write2(base, TIMER_SET, TIMER_STOP); 1131 nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */ 1132 1133 nsp32_write1(base, SYNC_REG, 0); 1134 nsp32_write1(base, ACK_WIDTH, 0); 1135 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME); 1136 1137 /* 1138 * enable to select designated IRQ (except for 1139 * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR) 1140 */ 1141 nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ | 1142 IRQSELECT_SCSIRESET_IRQ | 1143 IRQSELECT_FIFO_SHLD_IRQ | 1144 IRQSELECT_RESELECT_IRQ | 1145 IRQSELECT_PHASE_CHANGE_IRQ | 1146 IRQSELECT_AUTO_SCSI_SEQ_IRQ | 1147 // IRQSELECT_BMCNTERR_IRQ | 1148 IRQSELECT_TARGET_ABORT_IRQ | 1149 IRQSELECT_MASTER_ABORT_IRQ ); 1150 nsp32_write2(base, IRQ_CONTROL, 0); 1151 1152 /* PCI LED off */ 1153 nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF); 1154 nsp32_index_write1(base, EXT_PORT, LED_OFF); 1155 1156 return TRUE; 1157} 1158 1159 1160/* interrupt routine */ 1161static irqreturn_t do_nsp32_isr(int irq, void *dev_id) 1162{ 1163 nsp32_hw_data *data = dev_id; 1164 unsigned int base = data->BaseAddress; 1165 struct scsi_cmnd *SCpnt = data->CurrentSC; 1166 unsigned short auto_stat, irq_stat, trans_stat; 1167 unsigned char busmon, busphase; 1168 unsigned long flags; 1169 int ret; 1170 int handled = 0; 1171 struct Scsi_Host *host = data->Host; 1172 1173 spin_lock_irqsave(host->host_lock, flags); 1174 1175 /* 1176 * IRQ check, then enable IRQ mask 1177 */ 1178 irq_stat = nsp32_read2(base, IRQ_STATUS); 1179 nsp32_dbg(NSP32_DEBUG_INTR, 1180 "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat); 1181 /* is this interrupt comes from Ninja asic? */ 1182 if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) { 1183 nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat); 1184 goto out2; 1185 } 1186 handled = 1; 1187 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 1188 1189 busmon = nsp32_read1(base, SCSI_BUS_MONITOR); 1190 busphase = busmon & BUSMON_PHASE_MASK; 1191 1192 trans_stat = nsp32_read2(base, TRANSFER_STATUS); 1193 if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) { 1194 nsp32_msg(KERN_INFO, "card disconnect"); 1195 if (data->CurrentSC != NULL) { 1196 nsp32_msg(KERN_INFO, "clean up current SCSI command"); 1197 SCpnt->result = DID_BAD_TARGET << 16; 1198 nsp32_scsi_done(SCpnt); 1199 } 1200 goto out; 1201 } 1202 1203 /* Timer IRQ */ 1204 if (irq_stat & IRQSTATUS_TIMER_IRQ) { 1205 nsp32_dbg(NSP32_DEBUG_INTR, "timer stop"); 1206 nsp32_write2(base, TIMER_SET, TIMER_STOP); 1207 goto out; 1208 } 1209 1210 /* SCSI reset */ 1211 if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) { 1212 nsp32_msg(KERN_INFO, "detected someone do bus reset"); 1213 nsp32_do_bus_reset(data); 1214 if (SCpnt != NULL) { 1215 SCpnt->result = DID_RESET << 16; 1216 nsp32_scsi_done(SCpnt); 1217 } 1218 goto out; 1219 } 1220 1221 if (SCpnt == NULL) { 1222 nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened"); 1223 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat); 1224 goto out; 1225 } 1226 1227 /* 1228 * AutoSCSI Interrupt. 1229 * Note: This interrupt is occurred when AutoSCSI is finished. Then 1230 * check SCSIEXECUTEPHASE, and do appropriate action. Each phases are 1231 * recorded when AutoSCSI sequencer has been processed. 1232 */ 1233 if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) { 1234 /* getting SCSI executed phase */ 1235 auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE); 1236 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0); 1237 1238 /* Selection Timeout, go busfree phase. */ 1239 if (auto_stat & SELECTION_TIMEOUT) { 1240 nsp32_dbg(NSP32_DEBUG_INTR, 1241 "selection timeout occurred"); 1242 1243 SCpnt->result = DID_TIME_OUT << 16; 1244 nsp32_scsi_done(SCpnt); 1245 goto out; 1246 } 1247 1248 if (auto_stat & MSGOUT_PHASE) { 1249 /* 1250 * MsgOut phase was processed. 1251 * If MSG_IN_OCCUER is not set, then MsgOut phase is 1252 * completed. Thus, msgout_len must reset. Otherwise, 1253 * nothing to do here. If MSG_OUT_OCCUER is occurred, 1254 * then we will encounter the condition and check. 1255 */ 1256 if (!(auto_stat & MSG_IN_OCCUER) && 1257 (data->msgout_len <= 3)) { 1258 /* 1259 * !MSG_IN_OCCUER && msgout_len <=3 1260 * ---> AutoSCSI with MSGOUTreg is processed. 1261 */ 1262 data->msgout_len = 0; 1263 }; 1264 1265 nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed"); 1266 } 1267 1268 if ((auto_stat & DATA_IN_PHASE) && 1269 (scsi_get_resid(SCpnt) > 0) && 1270 ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) { 1271 printk( "auto+fifo\n"); 1272 //nsp32_pio_read(SCpnt); 1273 } 1274 1275 if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) { 1276 /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */ 1277 nsp32_dbg(NSP32_DEBUG_INTR, 1278 "Data in/out phase processed"); 1279 1280 /* read BMCNT, SGT pointer addr */ 1281 nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx", 1282 nsp32_read4(base, BM_CNT)); 1283 nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx", 1284 nsp32_read4(base, SGT_ADR)); 1285 nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx", 1286 nsp32_read4(base, SACK_CNT)); 1287 nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx", 1288 nsp32_read4(base, SAVED_SACK_CNT)); 1289 1290 scsi_set_resid(SCpnt, 0); /* all data transferred! */ 1291 } 1292 1293 /* 1294 * MsgIn Occur 1295 */ 1296 if (auto_stat & MSG_IN_OCCUER) { 1297 nsp32_msgin_occur(SCpnt, irq_stat, auto_stat); 1298 } 1299 1300 /* 1301 * MsgOut Occur 1302 */ 1303 if (auto_stat & MSG_OUT_OCCUER) { 1304 nsp32_msgout_occur(SCpnt); 1305 } 1306 1307 /* 1308 * Bus Free Occur 1309 */ 1310 if (auto_stat & BUS_FREE_OCCUER) { 1311 ret = nsp32_busfree_occur(SCpnt, auto_stat); 1312 if (ret == TRUE) { 1313 goto out; 1314 } 1315 } 1316 1317 if (auto_stat & STATUS_PHASE) { 1318 /* 1319 * Read CSB and substitute CSB for SCpnt->result 1320 * to save status phase stutas byte. 1321 * scsi error handler checks host_byte (DID_*: 1322 * low level driver to indicate status), then checks 1323 * status_byte (SCSI status byte). 1324 */ 1325 SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN); 1326 } 1327 1328 if (auto_stat & ILLEGAL_PHASE) { 1329 /* Illegal phase is detected. SACK is not back. */ 1330 nsp32_msg(KERN_WARNING, 1331 "AUTO SCSI ILLEGAL PHASE OCCUR!!!!"); 1332 1333 /* TODO: currently we don't have any action... bus reset? */ 1334 1335 /* 1336 * To send back SACK, assert, wait, and negate. 1337 */ 1338 nsp32_sack_assert(data); 1339 nsp32_wait_req(data, NEGATE); 1340 nsp32_sack_negate(data); 1341 1342 } 1343 1344 if (auto_stat & COMMAND_PHASE) { 1345 /* nothing to do */ 1346 nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed"); 1347 } 1348 1349 if (auto_stat & AUTOSCSI_BUSY) { 1350 /* AutoSCSI is running */ 1351 } 1352 1353 show_autophase(auto_stat); 1354 } 1355 1356 /* FIFO_SHLD_IRQ */ 1357 if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) { 1358 nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ"); 1359 1360 switch(busphase) { 1361 case BUSPHASE_DATA_OUT: 1362 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write"); 1363 1364 //nsp32_pio_write(SCpnt); 1365 1366 break; 1367 1368 case BUSPHASE_DATA_IN: 1369 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read"); 1370 1371 //nsp32_pio_read(SCpnt); 1372 1373 break; 1374 1375 case BUSPHASE_STATUS: 1376 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status"); 1377 1378 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1379 1380 break; 1381 default: 1382 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase"); 1383 nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat); 1384 show_busphase(busphase); 1385 break; 1386 } 1387 1388 goto out; 1389 } 1390 1391 /* Phase Change IRQ */ 1392 if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) { 1393 nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ"); 1394 1395 switch(busphase) { 1396 case BUSPHASE_MESSAGE_IN: 1397 nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in"); 1398 nsp32_msgin_occur(SCpnt, irq_stat, 0); 1399 break; 1400 default: 1401 nsp32_msg(KERN_WARNING, "phase chg/other phase?"); 1402 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n", 1403 irq_stat, trans_stat); 1404 show_busphase(busphase); 1405 break; 1406 } 1407 goto out; 1408 } 1409 1410 /* PCI_IRQ */ 1411 if (irq_stat & IRQSTATUS_PCI_IRQ) { 1412 nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred"); 1413 /* Do nothing */ 1414 } 1415 1416 /* BMCNTERR_IRQ */ 1417 if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) { 1418 nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! "); 1419 /* 1420 * TODO: To be implemented improving bus master 1421 * transfer reliability when BMCNTERR is occurred in 1422 * AutoSCSI phase described in specification. 1423 */ 1424 } 1425 1426#if 0 1427 nsp32_dbg(NSP32_DEBUG_INTR, 1428 "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat); 1429 show_busphase(busphase); 1430#endif 1431 1432 out: 1433 /* disable IRQ mask */ 1434 nsp32_write2(base, IRQ_CONTROL, 0); 1435 1436 out2: 1437 spin_unlock_irqrestore(host->host_lock, flags); 1438 1439 nsp32_dbg(NSP32_DEBUG_INTR, "exit"); 1440 1441 return IRQ_RETVAL(handled); 1442} 1443 1444 1445static int nsp32_show_info(struct seq_file *m, struct Scsi_Host *host) 1446{ 1447 unsigned long flags; 1448 nsp32_hw_data *data; 1449 int hostno; 1450 unsigned int base; 1451 unsigned char mode_reg; 1452 int id, speed; 1453 long model; 1454 1455 hostno = host->host_no; 1456 data = (nsp32_hw_data *)host->hostdata; 1457 base = host->io_port; 1458 1459 seq_puts(m, "NinjaSCSI-32 status\n\n"); 1460 seq_printf(m, "Driver version: %s, $Revision: 1.33 $\n", nsp32_release_version); 1461 seq_printf(m, "SCSI host No.: %d\n", hostno); 1462 seq_printf(m, "IRQ: %d\n", host->irq); 1463 seq_printf(m, "IO: 0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1); 1464 seq_printf(m, "MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1); 1465 seq_printf(m, "sg_tablesize: %d\n", host->sg_tablesize); 1466 seq_printf(m, "Chip revision: 0x%x\n", (nsp32_read2(base, INDEX_REG) >> 8) & 0xff); 1467 1468 mode_reg = nsp32_index_read1(base, CHIP_MODE); 1469 model = data->pci_devid->driver_data; 1470 1471#ifdef CONFIG_PM 1472 seq_printf(m, "Power Management: %s\n", (mode_reg & OPTF) ? "yes" : "no"); 1473#endif 1474 seq_printf(m, "OEM: %ld, %s\n", (mode_reg & (OEM0|OEM1)), nsp32_model[model]); 1475 1476 spin_lock_irqsave(&(data->Lock), flags); 1477 seq_printf(m, "CurrentSC: 0x%p\n\n", data->CurrentSC); 1478 spin_unlock_irqrestore(&(data->Lock), flags); 1479 1480 1481 seq_puts(m, "SDTR status\n"); 1482 for (id = 0; id < ARRAY_SIZE(data->target); id++) { 1483 1484 seq_printf(m, "id %d: ", id); 1485 1486 if (id == host->this_id) { 1487 seq_puts(m, "----- NinjaSCSI-32 host adapter\n"); 1488 continue; 1489 } 1490 1491 if (data->target[id].sync_flag == SDTR_DONE) { 1492 if (data->target[id].period == 0 && 1493 data->target[id].offset == ASYNC_OFFSET ) { 1494 seq_puts(m, "async"); 1495 } else { 1496 seq_puts(m, " sync"); 1497 } 1498 } else { 1499 seq_puts(m, " none"); 1500 } 1501 1502 if (data->target[id].period != 0) { 1503 1504 speed = 1000000 / (data->target[id].period * 4); 1505 1506 seq_printf(m, " transfer %d.%dMB/s, offset %d", 1507 speed / 1000, 1508 speed % 1000, 1509 data->target[id].offset 1510 ); 1511 } 1512 seq_putc(m, '\n'); 1513 } 1514 return 0; 1515} 1516 1517 1518 1519/* 1520 * Reset parameters and call scsi_done for data->cur_lunt. 1521 * Be careful setting SCpnt->result = DID_* before calling this function. 1522 */ 1523static void nsp32_scsi_done(struct scsi_cmnd *SCpnt) 1524{ 1525 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1526 unsigned int base = SCpnt->device->host->io_port; 1527 1528 scsi_dma_unmap(SCpnt); 1529 1530 /* 1531 * clear TRANSFERCONTROL_BM_START 1532 */ 1533 nsp32_write2(base, TRANSFER_CONTROL, 0); 1534 nsp32_write4(base, BM_CNT, 0); 1535 1536 /* 1537 * call scsi_done 1538 */ 1539 (*SCpnt->scsi_done)(SCpnt); 1540 1541 /* 1542 * reset parameters 1543 */ 1544 data->cur_lunt->SCpnt = NULL; 1545 data->cur_lunt = NULL; 1546 data->cur_target = NULL; 1547 data->CurrentSC = NULL; 1548} 1549 1550 1551/* 1552 * Bus Free Occur 1553 * 1554 * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase 1555 * with ACK reply when below condition is matched: 1556 * MsgIn 00: Command Complete. 1557 * MsgIn 02: Save Data Pointer. 1558 * MsgIn 04: Diconnect. 1559 * In other case, unexpected BUSFREE is detected. 1560 */ 1561static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph) 1562{ 1563 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1564 unsigned int base = SCpnt->device->host->io_port; 1565 1566 nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph); 1567 show_autophase(execph); 1568 1569 nsp32_write4(base, BM_CNT, 0); 1570 nsp32_write2(base, TRANSFER_CONTROL, 0); 1571 1572 /* 1573 * MsgIn 02: Save Data Pointer 1574 * 1575 * VALID: 1576 * Save Data Pointer is received. Adjust pointer. 1577 * 1578 * NO-VALID: 1579 * SCSI-3 says if Save Data Pointer is not received, then we restart 1580 * processing and we can't adjust any SCSI data pointer in next data 1581 * phase. 1582 */ 1583 if (execph & MSGIN_02_VALID) { 1584 nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid"); 1585 1586 /* 1587 * Check sack_cnt/saved_sack_cnt, then adjust sg table if 1588 * needed. 1589 */ 1590 if (!(execph & MSGIN_00_VALID) && 1591 ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) { 1592 unsigned int sacklen, s_sacklen; 1593 1594 /* 1595 * Read SACK count and SAVEDSACK count, then compare. 1596 */ 1597 sacklen = nsp32_read4(base, SACK_CNT ); 1598 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT); 1599 1600 /* 1601 * If SAVEDSACKCNT == 0, it means SavedDataPointer is 1602 * come after data transferring. 1603 */ 1604 if (s_sacklen > 0) { 1605 /* 1606 * Comparing between sack and savedsack to 1607 * check the condition of AutoMsgIn03. 1608 * 1609 * If they are same, set msgin03 == TRUE, 1610 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at 1611 * reselection. On the other hand, if they 1612 * aren't same, set msgin03 == FALSE, and 1613 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at 1614 * reselection. 1615 */ 1616 if (sacklen != s_sacklen) { 1617 data->cur_lunt->msgin03 = FALSE; 1618 } else { 1619 data->cur_lunt->msgin03 = TRUE; 1620 } 1621 1622 nsp32_adjust_busfree(SCpnt, s_sacklen); 1623 } 1624 } 1625 1626 /* This value has not substitude with valid value yet... */ 1627 //data->cur_lunt->save_datp = data->cur_datp; 1628 } else { 1629 /* 1630 * no processing. 1631 */ 1632 } 1633 1634 if (execph & MSGIN_03_VALID) { 1635 /* MsgIn03 was valid to be processed. No need processing. */ 1636 } 1637 1638 /* 1639 * target SDTR check 1640 */ 1641 if (data->cur_target->sync_flag & SDTR_INITIATOR) { 1642 /* 1643 * SDTR negotiation pulled by the initiator has not 1644 * finished yet. Fall back to ASYNC mode. 1645 */ 1646 nsp32_set_async(data, data->cur_target); 1647 data->cur_target->sync_flag &= ~SDTR_INITIATOR; 1648 data->cur_target->sync_flag |= SDTR_DONE; 1649 } else if (data->cur_target->sync_flag & SDTR_TARGET) { 1650 /* 1651 * SDTR negotiation pulled by the target has been 1652 * negotiating. 1653 */ 1654 if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) { 1655 /* 1656 * If valid message is received, then 1657 * negotiation is succeeded. 1658 */ 1659 } else { 1660 /* 1661 * On the contrary, if unexpected bus free is 1662 * occurred, then negotiation is failed. Fall 1663 * back to ASYNC mode. 1664 */ 1665 nsp32_set_async(data, data->cur_target); 1666 } 1667 data->cur_target->sync_flag &= ~SDTR_TARGET; 1668 data->cur_target->sync_flag |= SDTR_DONE; 1669 } 1670 1671 /* 1672 * It is always ensured by SCSI standard that initiator 1673 * switches into Bus Free Phase after 1674 * receiving message 00 (Command Complete), 04 (Disconnect). 1675 * It's the reason that processing here is valid. 1676 */ 1677 if (execph & MSGIN_00_VALID) { 1678 /* MsgIn 00: Command Complete */ 1679 nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete"); 1680 1681 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1682 SCpnt->SCp.Message = 0; 1683 nsp32_dbg(NSP32_DEBUG_BUSFREE, 1684 "normal end stat=0x%x resid=0x%x\n", 1685 SCpnt->SCp.Status, scsi_get_resid(SCpnt)); 1686 SCpnt->result = (DID_OK << 16) | 1687 (SCpnt->SCp.Message << 8) | 1688 (SCpnt->SCp.Status << 0); 1689 nsp32_scsi_done(SCpnt); 1690 /* All operation is done */ 1691 return TRUE; 1692 } else if (execph & MSGIN_04_VALID) { 1693 /* MsgIn 04: Disconnect */ 1694 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1695 SCpnt->SCp.Message = 4; 1696 1697 nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect"); 1698 return TRUE; 1699 } else { 1700 /* Unexpected bus free */ 1701 nsp32_msg(KERN_WARNING, "unexpected bus free occurred"); 1702 1703 /* DID_ERROR? */ 1704 //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0); 1705 SCpnt->result = DID_ERROR << 16; 1706 nsp32_scsi_done(SCpnt); 1707 return TRUE; 1708 } 1709 return FALSE; 1710} 1711 1712 1713/* 1714 * nsp32_adjust_busfree - adjusting SG table 1715 * 1716 * Note: This driver adjust the SG table using SCSI ACK 1717 * counter instead of BMCNT counter! 1718 */ 1719static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen) 1720{ 1721 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1722 int old_entry = data->cur_entry; 1723 int new_entry; 1724 int sg_num = data->cur_lunt->sg_num; 1725 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt; 1726 unsigned int restlen, sentlen; 1727 u32_le len, addr; 1728 1729 nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", scsi_get_resid(SCpnt)); 1730 1731 /* adjust saved SACK count with 4 byte start address boundary */ 1732 s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3; 1733 1734 /* 1735 * calculate new_entry from sack count and each sgt[].len 1736 * calculate the byte which is intent to send 1737 */ 1738 sentlen = 0; 1739 for (new_entry = old_entry; new_entry < sg_num; new_entry++) { 1740 sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND); 1741 if (sentlen > s_sacklen) { 1742 break; 1743 } 1744 } 1745 1746 /* all sgt is processed */ 1747 if (new_entry == sg_num) { 1748 goto last; 1749 } 1750 1751 if (sentlen == s_sacklen) { 1752 /* XXX: confirm it's ok or not */ 1753 /* In this case, it's ok because we are at 1754 the head element of the sg. restlen is correctly calculated. */ 1755 } 1756 1757 /* calculate the rest length for transferring */ 1758 restlen = sentlen - s_sacklen; 1759 1760 /* update adjusting current SG table entry */ 1761 len = le32_to_cpu(sgt[new_entry].len); 1762 addr = le32_to_cpu(sgt[new_entry].addr); 1763 addr += (len - restlen); 1764 sgt[new_entry].addr = cpu_to_le32(addr); 1765 sgt[new_entry].len = cpu_to_le32(restlen); 1766 1767 /* set cur_entry with new_entry */ 1768 data->cur_entry = new_entry; 1769 1770 return; 1771 1772 last: 1773 if (scsi_get_resid(SCpnt) < sentlen) { 1774 nsp32_msg(KERN_ERR, "resid underflow"); 1775 } 1776 1777 scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) - sentlen); 1778 nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", scsi_get_resid(SCpnt)); 1779 1780 /* update hostdata and lun */ 1781 1782 return; 1783} 1784 1785 1786/* 1787 * It's called MsgOut phase occur. 1788 * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in 1789 * message out phase. It, however, has more than 3 messages, 1790 * HBA creates the interrupt and we have to process by hand. 1791 */ 1792static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt) 1793{ 1794 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1795 unsigned int base = SCpnt->device->host->io_port; 1796 //unsigned short command; 1797 long new_sgtp; 1798 int i; 1799 1800 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, 1801 "enter: msgout_len: 0x%x", data->msgout_len); 1802 1803 /* 1804 * If MsgOut phase is occurred without having any 1805 * message, then No_Operation is sent (SCSI-2). 1806 */ 1807 if (data->msgout_len == 0) { 1808 nsp32_build_nop(SCpnt); 1809 } 1810 1811 /* 1812 * Set SGTP ADDR current entry for restarting AUTOSCSI, 1813 * because SGTP is incremented next point. 1814 * There is few statement in the specification... 1815 */ 1816 new_sgtp = data->cur_lunt->sglun_paddr + 1817 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable)); 1818 1819 /* 1820 * send messages 1821 */ 1822 for (i = 0; i < data->msgout_len; i++) { 1823 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, 1824 "%d : 0x%x", i, data->msgoutbuf[i]); 1825 1826 /* 1827 * Check REQ is asserted. 1828 */ 1829 nsp32_wait_req(data, ASSERT); 1830 1831 if (i == (data->msgout_len - 1)) { 1832 /* 1833 * If the last message, set the AutoSCSI restart 1834 * before send back the ack message. AutoSCSI 1835 * restart automatically negate ATN signal. 1836 */ 1837 //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02); 1838 //nsp32_restart_autoscsi(SCpnt, command); 1839 nsp32_write2(base, COMMAND_CONTROL, 1840 (CLEAR_CDB_FIFO_POINTER | 1841 AUTO_COMMAND_PHASE | 1842 AUTOSCSI_RESTART | 1843 AUTO_MSGIN_00_OR_04 | 1844 AUTO_MSGIN_02 )); 1845 } 1846 /* 1847 * Write data with SACK, then wait sack is 1848 * automatically negated. 1849 */ 1850 nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]); 1851 nsp32_wait_sack(data, NEGATE); 1852 1853 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n", 1854 nsp32_read1(base, SCSI_BUS_MONITOR)); 1855 }; 1856 1857 data->msgout_len = 0; 1858 1859 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit"); 1860} 1861 1862/* 1863 * Restart AutoSCSI 1864 * 1865 * Note: Restarting AutoSCSI needs set: 1866 * SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL 1867 */ 1868static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command) 1869{ 1870 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1871 unsigned int base = data->BaseAddress; 1872 unsigned short transfer = 0; 1873 1874 nsp32_dbg(NSP32_DEBUG_RESTART, "enter"); 1875 1876 if (data->cur_target == NULL || data->cur_lunt == NULL) { 1877 nsp32_msg(KERN_ERR, "Target or Lun is invalid"); 1878 } 1879 1880 /* 1881 * set SYNC_REG 1882 * Don't set BM_START_ADR before setting this register. 1883 */ 1884 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg); 1885 1886 /* 1887 * set ACKWIDTH 1888 */ 1889 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth); 1890 1891 /* 1892 * set SREQ hazard killer sampling rate 1893 */ 1894 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg); 1895 1896 /* 1897 * set SGT ADDR (physical address) 1898 */ 1899 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr); 1900 1901 /* 1902 * set TRANSFER CONTROL REG 1903 */ 1904 transfer = 0; 1905 transfer |= (TRANSFER_GO | ALL_COUNTER_CLR); 1906 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 1907 if (scsi_bufflen(SCpnt) > 0) { 1908 transfer |= BM_START; 1909 } 1910 } else if (data->trans_method & NSP32_TRANSFER_MMIO) { 1911 transfer |= CB_MMIO_MODE; 1912 } else if (data->trans_method & NSP32_TRANSFER_PIO) { 1913 transfer |= CB_IO_MODE; 1914 } 1915 nsp32_write2(base, TRANSFER_CONTROL, transfer); 1916 1917 /* 1918 * restart AutoSCSI 1919 * 1920 * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ? 1921 */ 1922 command |= (CLEAR_CDB_FIFO_POINTER | 1923 AUTO_COMMAND_PHASE | 1924 AUTOSCSI_RESTART ); 1925 nsp32_write2(base, COMMAND_CONTROL, command); 1926 1927 nsp32_dbg(NSP32_DEBUG_RESTART, "exit"); 1928} 1929 1930 1931/* 1932 * cannot run automatically message in occur 1933 */ 1934static void nsp32_msgin_occur(struct scsi_cmnd *SCpnt, 1935 unsigned long irq_status, 1936 unsigned short execph) 1937{ 1938 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1939 unsigned int base = SCpnt->device->host->io_port; 1940 unsigned char msg; 1941 unsigned char msgtype; 1942 unsigned char newlun; 1943 unsigned short command = 0; 1944 int msgclear = TRUE; 1945 long new_sgtp; 1946 int ret; 1947 1948 /* 1949 * read first message 1950 * Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure 1951 * of Message-In have to be processed before sending back SCSI ACK. 1952 */ 1953 msg = nsp32_read1(base, SCSI_DATA_IN); 1954 data->msginbuf[(unsigned char)data->msgin_len] = msg; 1955 msgtype = data->msginbuf[0]; 1956 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, 1957 "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x", 1958 data->msgin_len, msg, msgtype); 1959 1960 /* 1961 * TODO: We need checking whether bus phase is message in? 1962 */ 1963 1964 /* 1965 * assert SCSI ACK 1966 */ 1967 nsp32_sack_assert(data); 1968 1969 /* 1970 * processing IDENTIFY 1971 */ 1972 if (msgtype & 0x80) { 1973 if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) { 1974 /* Invalid (non reselect) phase */ 1975 goto reject; 1976 } 1977 1978 newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */ 1979 ret = nsp32_reselection(SCpnt, newlun); 1980 if (ret == TRUE) { 1981 goto restart; 1982 } else { 1983 goto reject; 1984 } 1985 } 1986 1987 /* 1988 * processing messages except for IDENTIFY 1989 * 1990 * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO. 1991 */ 1992 switch (msgtype) { 1993 /* 1994 * 1-byte message 1995 */ 1996 case COMMAND_COMPLETE: 1997 case DISCONNECT: 1998 /* 1999 * These messages should not be occurred. 2000 * They should be processed on AutoSCSI sequencer. 2001 */ 2002 nsp32_msg(KERN_WARNING, 2003 "unexpected message of AutoSCSI MsgIn: 0x%x", msg); 2004 break; 2005 2006 case RESTORE_POINTERS: 2007 /* 2008 * AutoMsgIn03 is disabled, and HBA gets this message. 2009 */ 2010 2011 if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) { 2012 unsigned int s_sacklen; 2013 2014 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT); 2015 if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) { 2016 nsp32_adjust_busfree(SCpnt, s_sacklen); 2017 } else { 2018 /* No need to rewrite SGT */ 2019 } 2020 } 2021 data->cur_lunt->msgin03 = FALSE; 2022 2023 /* Update with the new value */ 2024 2025 /* reset SACK/SavedACK counter (or ALL clear?) */ 2026 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 2027 2028 /* 2029 * set new sg pointer 2030 */ 2031 new_sgtp = data->cur_lunt->sglun_paddr + 2032 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable)); 2033 nsp32_write4(base, SGT_ADR, new_sgtp); 2034 2035 break; 2036 2037 case SAVE_POINTERS: 2038 /* 2039 * These messages should not be occurred. 2040 * They should be processed on AutoSCSI sequencer. 2041 */ 2042 nsp32_msg (KERN_WARNING, 2043 "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS"); 2044 2045 break; 2046 2047 case MESSAGE_REJECT: 2048 /* If previous message_out is sending SDTR, and get 2049 message_reject from target, SDTR negotiation is failed */ 2050 if (data->cur_target->sync_flag & 2051 (SDTR_INITIATOR | SDTR_TARGET)) { 2052 /* 2053 * Current target is negotiating SDTR, but it's 2054 * failed. Fall back to async transfer mode, and set 2055 * SDTR_DONE. 2056 */ 2057 nsp32_set_async(data, data->cur_target); 2058 data->cur_target->sync_flag &= ~SDTR_INITIATOR; 2059 data->cur_target->sync_flag |= SDTR_DONE; 2060 2061 } 2062 break; 2063 2064 case LINKED_CMD_COMPLETE: 2065 case LINKED_FLG_CMD_COMPLETE: 2066 /* queue tag is not supported currently */ 2067 nsp32_msg (KERN_WARNING, 2068 "unsupported message: 0x%x", msgtype); 2069 break; 2070 2071 case INITIATE_RECOVERY: 2072 /* staring ECA (Extended Contingent Allegiance) state. */ 2073 /* This message is declined in SPI2 or later. */ 2074 2075 goto reject; 2076 2077 /* 2078 * 2-byte message 2079 */ 2080 case SIMPLE_QUEUE_TAG: 2081 case 0x23: 2082 /* 2083 * 0x23: Ignore_Wide_Residue is not declared in scsi.h. 2084 * No support is needed. 2085 */ 2086 if (data->msgin_len >= 1) { 2087 goto reject; 2088 } 2089 2090 /* current position is 1-byte of 2 byte */ 2091 msgclear = FALSE; 2092 2093 break; 2094 2095 /* 2096 * extended message 2097 */ 2098 case EXTENDED_MESSAGE: 2099 if (data->msgin_len < 1) { 2100 /* 2101 * Current position does not reach 2-byte 2102 * (2-byte is extended message length). 2103 */ 2104 msgclear = FALSE; 2105 break; 2106 } 2107 2108 if ((data->msginbuf[1] + 1) > data->msgin_len) { 2109 /* 2110 * Current extended message has msginbuf[1] + 2 2111 * (msgin_len starts counting from 0, so buf[1] + 1). 2112 * If current message position is not finished, 2113 * continue receiving message. 2114 */ 2115 msgclear = FALSE; 2116 break; 2117 } 2118 2119 /* 2120 * Reach here means regular length of each type of 2121 * extended messages. 2122 */ 2123 switch (data->msginbuf[2]) { 2124 case EXTENDED_MODIFY_DATA_POINTER: 2125 /* TODO */ 2126 goto reject; /* not implemented yet */ 2127 break; 2128 2129 case EXTENDED_SDTR: 2130 /* 2131 * Exchange this message between initiator and target. 2132 */ 2133 if (data->msgin_len != EXTENDED_SDTR_LEN + 1) { 2134 /* 2135 * received inappropriate message. 2136 */ 2137 goto reject; 2138 break; 2139 } 2140 2141 nsp32_analyze_sdtr(SCpnt); 2142 2143 break; 2144 2145 case EXTENDED_EXTENDED_IDENTIFY: 2146 /* SCSI-I only, not supported. */ 2147 goto reject; /* not implemented yet */ 2148 2149 break; 2150 2151 case EXTENDED_WDTR: 2152 goto reject; /* not implemented yet */ 2153 2154 break; 2155 2156 default: 2157 goto reject; 2158 } 2159 break; 2160 2161 default: 2162 goto reject; 2163 } 2164 2165 restart: 2166 if (msgclear == TRUE) { 2167 data->msgin_len = 0; 2168 2169 /* 2170 * If restarting AutoSCSI, but there are some message to out 2171 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0 2172 * (MV_VALID = 0). When commandcontrol is written with 2173 * AutoSCSI restart, at the same time MsgOutOccur should be 2174 * happened (however, such situation is really possible...?). 2175 */ 2176 if (data->msgout_len > 0) { 2177 nsp32_write4(base, SCSI_MSG_OUT, 0); 2178 command |= AUTO_ATN; 2179 } 2180 2181 /* 2182 * restart AutoSCSI 2183 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed. 2184 */ 2185 command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02); 2186 2187 /* 2188 * If current msgin03 is TRUE, then flag on. 2189 */ 2190 if (data->cur_lunt->msgin03 == TRUE) { 2191 command |= AUTO_MSGIN_03; 2192 } 2193 data->cur_lunt->msgin03 = FALSE; 2194 } else { 2195 data->msgin_len++; 2196 } 2197 2198 /* 2199 * restart AutoSCSI 2200 */ 2201 nsp32_restart_autoscsi(SCpnt, command); 2202 2203 /* 2204 * wait SCSI REQ negate for REQ-ACK handshake 2205 */ 2206 nsp32_wait_req(data, NEGATE); 2207 2208 /* 2209 * negate SCSI ACK 2210 */ 2211 nsp32_sack_negate(data); 2212 2213 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit"); 2214 2215 return; 2216 2217 reject: 2218 nsp32_msg(KERN_WARNING, 2219 "invalid or unsupported MessageIn, rejected. " 2220 "current msg: 0x%x (len: 0x%x), processing msg: 0x%x", 2221 msg, data->msgin_len, msgtype); 2222 nsp32_build_reject(SCpnt); 2223 data->msgin_len = 0; 2224 2225 goto restart; 2226} 2227 2228/* 2229 * 2230 */ 2231static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt) 2232{ 2233 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2234 nsp32_target *target = data->cur_target; 2235 nsp32_sync_table *synct; 2236 unsigned char get_period = data->msginbuf[3]; 2237 unsigned char get_offset = data->msginbuf[4]; 2238 int entry; 2239 int syncnum; 2240 2241 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter"); 2242 2243 synct = data->synct; 2244 syncnum = data->syncnum; 2245 2246 /* 2247 * If this inititor sent the SDTR message, then target responds SDTR, 2248 * initiator SYNCREG, ACKWIDTH from SDTR parameter. 2249 * Messages are not appropriate, then send back reject message. 2250 * If initiator did not send the SDTR, but target sends SDTR, 2251 * initiator calculator the appropriate parameter and send back SDTR. 2252 */ 2253 if (target->sync_flag & SDTR_INITIATOR) { 2254 /* 2255 * Initiator sent SDTR, the target responds and 2256 * send back negotiation SDTR. 2257 */ 2258 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR"); 2259 2260 target->sync_flag &= ~SDTR_INITIATOR; 2261 target->sync_flag |= SDTR_DONE; 2262 2263 /* 2264 * offset: 2265 */ 2266 if (get_offset > SYNC_OFFSET) { 2267 /* 2268 * Negotiation is failed, the target send back 2269 * unexpected offset value. 2270 */ 2271 goto reject; 2272 } 2273 2274 if (get_offset == ASYNC_OFFSET) { 2275 /* 2276 * Negotiation is succeeded, the target want 2277 * to fall back into asynchronous transfer mode. 2278 */ 2279 goto async; 2280 } 2281 2282 /* 2283 * period: 2284 * Check whether sync period is too short. If too short, 2285 * fall back to async mode. If it's ok, then investigate 2286 * the received sync period. If sync period is acceptable 2287 * between sync table start_period and end_period, then 2288 * set this I_T nexus as sent offset and period. 2289 * If it's not acceptable, send back reject and fall back 2290 * to async mode. 2291 */ 2292 if (get_period < data->synct[0].period_num) { 2293 /* 2294 * Negotiation is failed, the target send back 2295 * unexpected period value. 2296 */ 2297 goto reject; 2298 } 2299 2300 entry = nsp32_search_period_entry(data, target, get_period); 2301 2302 if (entry < 0) { 2303 /* 2304 * Target want to use long period which is not 2305 * acceptable NinjaSCSI-32Bi/UDE. 2306 */ 2307 goto reject; 2308 } 2309 2310 /* 2311 * Set new sync table and offset in this I_T nexus. 2312 */ 2313 nsp32_set_sync_entry(data, target, entry, get_offset); 2314 } else { 2315 /* Target send SDTR to initiator. */ 2316 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR"); 2317 2318 target->sync_flag |= SDTR_INITIATOR; 2319 2320 /* offset: */ 2321 if (get_offset > SYNC_OFFSET) { 2322 /* send back as SYNC_OFFSET */ 2323 get_offset = SYNC_OFFSET; 2324 } 2325 2326 /* period: */ 2327 if (get_period < data->synct[0].period_num) { 2328 get_period = data->synct[0].period_num; 2329 } 2330 2331 entry = nsp32_search_period_entry(data, target, get_period); 2332 2333 if (get_offset == ASYNC_OFFSET || entry < 0) { 2334 nsp32_set_async(data, target); 2335 nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET); 2336 } else { 2337 nsp32_set_sync_entry(data, target, entry, get_offset); 2338 nsp32_build_sdtr(SCpnt, get_period, get_offset); 2339 } 2340 } 2341 2342 target->period = get_period; 2343 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit"); 2344 return; 2345 2346 reject: 2347 /* 2348 * If the current message is unacceptable, send back to the target 2349 * with reject message. 2350 */ 2351 nsp32_build_reject(SCpnt); 2352 2353 async: 2354 nsp32_set_async(data, target); /* set as ASYNC transfer mode */ 2355 2356 target->period = 0; 2357 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async"); 2358 return; 2359} 2360 2361 2362/* 2363 * Search config entry number matched in sync_table from given 2364 * target and speed period value. If failed to search, return negative value. 2365 */ 2366static int nsp32_search_period_entry(nsp32_hw_data *data, 2367 nsp32_target *target, 2368 unsigned char period) 2369{ 2370 int i; 2371 2372 if (target->limit_entry >= data->syncnum) { 2373 nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!"); 2374 target->limit_entry = 0; 2375 } 2376 2377 for (i = target->limit_entry; i < data->syncnum; i++) { 2378 if (period >= data->synct[i].start_period && 2379 period <= data->synct[i].end_period) { 2380 break; 2381 } 2382 } 2383 2384 /* 2385 * Check given period value is over the sync_table value. 2386 * If so, return max value. 2387 */ 2388 if (i == data->syncnum) { 2389 i = -1; 2390 } 2391 2392 return i; 2393} 2394 2395 2396/* 2397 * target <-> initiator use ASYNC transfer 2398 */ 2399static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target) 2400{ 2401 unsigned char period = data->synct[target->limit_entry].period_num; 2402 2403 target->offset = ASYNC_OFFSET; 2404 target->period = 0; 2405 target->syncreg = TO_SYNCREG(period, ASYNC_OFFSET); 2406 target->ackwidth = 0; 2407 target->sample_reg = 0; 2408 2409 nsp32_dbg(NSP32_DEBUG_SYNC, "set async"); 2410} 2411 2412 2413/* 2414 * target <-> initiator use maximum SYNC transfer 2415 */ 2416static void nsp32_set_max_sync(nsp32_hw_data *data, 2417 nsp32_target *target, 2418 unsigned char *period, 2419 unsigned char *offset) 2420{ 2421 unsigned char period_num, ackwidth; 2422 2423 period_num = data->synct[target->limit_entry].period_num; 2424 *period = data->synct[target->limit_entry].start_period; 2425 ackwidth = data->synct[target->limit_entry].ackwidth; 2426 *offset = SYNC_OFFSET; 2427 2428 target->syncreg = TO_SYNCREG(period_num, *offset); 2429 target->ackwidth = ackwidth; 2430 target->offset = *offset; 2431 target->sample_reg = 0; /* disable SREQ sampling */ 2432} 2433 2434 2435/* 2436 * target <-> initiator use entry number speed 2437 */ 2438static void nsp32_set_sync_entry(nsp32_hw_data *data, 2439 nsp32_target *target, 2440 int entry, 2441 unsigned char offset) 2442{ 2443 unsigned char period, ackwidth, sample_rate; 2444 2445 period = data->synct[entry].period_num; 2446 ackwidth = data->synct[entry].ackwidth; 2447 offset = offset; 2448 sample_rate = data->synct[entry].sample_rate; 2449 2450 target->syncreg = TO_SYNCREG(period, offset); 2451 target->ackwidth = ackwidth; 2452 target->offset = offset; 2453 target->sample_reg = sample_rate | SAMPLING_ENABLE; 2454 2455 nsp32_dbg(NSP32_DEBUG_SYNC, "set sync"); 2456} 2457 2458 2459/* 2460 * It waits until SCSI REQ becomes assertion or negation state. 2461 * 2462 * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then 2463 * connected target responds SCSI REQ negation. We have to wait 2464 * SCSI REQ becomes negation in order to negate SCSI ACK signal for 2465 * REQ-ACK handshake. 2466 */ 2467static void nsp32_wait_req(nsp32_hw_data *data, int state) 2468{ 2469 unsigned int base = data->BaseAddress; 2470 int wait_time = 0; 2471 unsigned char bus, req_bit; 2472 2473 if (!((state == ASSERT) || (state == NEGATE))) { 2474 nsp32_msg(KERN_ERR, "unknown state designation"); 2475 } 2476 /* REQ is BIT(5) */ 2477 req_bit = (state == ASSERT ? BUSMON_REQ : 0); 2478 2479 do { 2480 bus = nsp32_read1(base, SCSI_BUS_MONITOR); 2481 if ((bus & BUSMON_REQ) == req_bit) { 2482 nsp32_dbg(NSP32_DEBUG_WAIT, 2483 "wait_time: %d", wait_time); 2484 return; 2485 } 2486 udelay(1); 2487 wait_time++; 2488 } while (wait_time < REQSACK_TIMEOUT_TIME); 2489 2490 nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit); 2491} 2492 2493/* 2494 * It waits until SCSI SACK becomes assertion or negation state. 2495 */ 2496static void nsp32_wait_sack(nsp32_hw_data *data, int state) 2497{ 2498 unsigned int base = data->BaseAddress; 2499 int wait_time = 0; 2500 unsigned char bus, ack_bit; 2501 2502 if (!((state == ASSERT) || (state == NEGATE))) { 2503 nsp32_msg(KERN_ERR, "unknown state designation"); 2504 } 2505 /* ACK is BIT(4) */ 2506 ack_bit = (state == ASSERT ? BUSMON_ACK : 0); 2507 2508 do { 2509 bus = nsp32_read1(base, SCSI_BUS_MONITOR); 2510 if ((bus & BUSMON_ACK) == ack_bit) { 2511 nsp32_dbg(NSP32_DEBUG_WAIT, 2512 "wait_time: %d", wait_time); 2513 return; 2514 } 2515 udelay(1); 2516 wait_time++; 2517 } while (wait_time < REQSACK_TIMEOUT_TIME); 2518 2519 nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit); 2520} 2521 2522/* 2523 * assert SCSI ACK 2524 * 2525 * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1. 2526 */ 2527static void nsp32_sack_assert(nsp32_hw_data *data) 2528{ 2529 unsigned int base = data->BaseAddress; 2530 unsigned char busctrl; 2531 2532 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL); 2533 busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB); 2534 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl); 2535} 2536 2537/* 2538 * negate SCSI ACK 2539 */ 2540static void nsp32_sack_negate(nsp32_hw_data *data) 2541{ 2542 unsigned int base = data->BaseAddress; 2543 unsigned char busctrl; 2544 2545 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL); 2546 busctrl &= ~BUSCTL_ACK; 2547 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl); 2548} 2549 2550 2551 2552/* 2553 * Note: n_io_port is defined as 0x7f because I/O register port is 2554 * assigned as: 2555 * 0x800-0x8ff: memory mapped I/O port 2556 * 0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly) 2557 * 0xc00-0xfff: CardBus status registers 2558 */ 2559static int nsp32_detect(struct pci_dev *pdev) 2560{ 2561 struct Scsi_Host *host; /* registered host structure */ 2562 struct resource *res; 2563 nsp32_hw_data *data; 2564 int ret; 2565 int i, j; 2566 2567 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 2568 2569 /* 2570 * register this HBA as SCSI device 2571 */ 2572 host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data)); 2573 if (host == NULL) { 2574 nsp32_msg (KERN_ERR, "failed to scsi register"); 2575 goto err; 2576 } 2577 2578 /* 2579 * set nsp32_hw_data 2580 */ 2581 data = (nsp32_hw_data *)host->hostdata; 2582 2583 memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data)); 2584 2585 host->irq = data->IrqNumber; 2586 host->io_port = data->BaseAddress; 2587 host->unique_id = data->BaseAddress; 2588 host->n_io_port = data->NumAddress; 2589 host->base = (unsigned long)data->MmioAddress; 2590 2591 data->Host = host; 2592 spin_lock_init(&(data->Lock)); 2593 2594 data->cur_lunt = NULL; 2595 data->cur_target = NULL; 2596 2597 /* 2598 * Bus master transfer mode is supported currently. 2599 */ 2600 data->trans_method = NSP32_TRANSFER_BUSMASTER; 2601 2602 /* 2603 * Set clock div, CLOCK_4 (HBA has own external clock, and 2604 * dividing * 100ns/4). 2605 * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet. 2606 */ 2607 data->clock = CLOCK_4; 2608 2609 /* 2610 * Select appropriate nsp32_sync_table and set I_CLOCKDIV. 2611 */ 2612 switch (data->clock) { 2613 case CLOCK_4: 2614 /* If data->clock is CLOCK_4, then select 40M sync table. */ 2615 data->synct = nsp32_sync_table_40M; 2616 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M); 2617 break; 2618 case CLOCK_2: 2619 /* If data->clock is CLOCK_2, then select 20M sync table. */ 2620 data->synct = nsp32_sync_table_20M; 2621 data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M); 2622 break; 2623 case PCICLK: 2624 /* If data->clock is PCICLK, then select pci sync table. */ 2625 data->synct = nsp32_sync_table_pci; 2626 data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci); 2627 break; 2628 default: 2629 nsp32_msg(KERN_WARNING, 2630 "Invalid clock div is selected, set CLOCK_4."); 2631 /* Use default value CLOCK_4 */ 2632 data->clock = CLOCK_4; 2633 data->synct = nsp32_sync_table_40M; 2634 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M); 2635 } 2636 2637 /* 2638 * setup nsp32_lunt 2639 */ 2640 2641 /* 2642 * setup DMA 2643 */ 2644 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 2645 nsp32_msg (KERN_ERR, "failed to set PCI DMA mask"); 2646 goto scsi_unregister; 2647 } 2648 2649 /* 2650 * allocate autoparam DMA resource. 2651 */ 2652 data->autoparam = pci_alloc_consistent(pdev, sizeof(nsp32_autoparam), &(data->auto_paddr)); 2653 if (data->autoparam == NULL) { 2654 nsp32_msg(KERN_ERR, "failed to allocate DMA memory"); 2655 goto scsi_unregister; 2656 } 2657 2658 /* 2659 * allocate scatter-gather DMA resource. 2660 */ 2661 data->sg_list = pci_alloc_consistent(pdev, NSP32_SG_TABLE_SIZE, 2662 &(data->sg_paddr)); 2663 if (data->sg_list == NULL) { 2664 nsp32_msg(KERN_ERR, "failed to allocate DMA memory"); 2665 goto free_autoparam; 2666 } 2667 2668 for (i = 0; i < ARRAY_SIZE(data->lunt); i++) { 2669 for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) { 2670 int offset = i * ARRAY_SIZE(data->lunt[0]) + j; 2671 nsp32_lunt tmp = { 2672 .SCpnt = NULL, 2673 .save_datp = 0, 2674 .msgin03 = FALSE, 2675 .sg_num = 0, 2676 .cur_entry = 0, 2677 .sglun = &(data->sg_list[offset]), 2678 .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)), 2679 }; 2680 2681 data->lunt[i][j] = tmp; 2682 } 2683 } 2684 2685 /* 2686 * setup target 2687 */ 2688 for (i = 0; i < ARRAY_SIZE(data->target); i++) { 2689 nsp32_target *target = &(data->target[i]); 2690 2691 target->limit_entry = 0; 2692 target->sync_flag = 0; 2693 nsp32_set_async(data, target); 2694 } 2695 2696 /* 2697 * EEPROM check 2698 */ 2699 ret = nsp32_getprom_param(data); 2700 if (ret == FALSE) { 2701 data->resettime = 3; /* default 3 */ 2702 } 2703 2704 /* 2705 * setup HBA 2706 */ 2707 nsp32hw_init(data); 2708 2709 snprintf(data->info_str, sizeof(data->info_str), 2710 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x", 2711 host->irq, host->io_port, host->n_io_port); 2712 2713 /* 2714 * SCSI bus reset 2715 * 2716 * Note: It's important to reset SCSI bus in initialization phase. 2717 * NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when 2718 * system is coming up, so SCSI devices connected to HBA is set as 2719 * un-asynchronous mode. It brings the merit that this HBA is 2720 * ready to start synchronous transfer without any preparation, 2721 * but we are difficult to control transfer speed. In addition, 2722 * it prevents device transfer speed from effecting EEPROM start-up 2723 * SDTR. NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as 2724 * Auto Mode, then FAST-10M is selected when SCSI devices are 2725 * connected same or more than 4 devices. It should be avoided 2726 * depending on this specification. Thus, resetting the SCSI bus 2727 * restores all connected SCSI devices to asynchronous mode, then 2728 * this driver set SDTR safely later, and we can control all SCSI 2729 * device transfer mode. 2730 */ 2731 nsp32_do_bus_reset(data); 2732 2733 ret = request_irq(host->irq, do_nsp32_isr, IRQF_SHARED, "nsp32", data); 2734 if (ret < 0) { 2735 nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 " 2736 "SCSI PCI controller. Interrupt: %d", host->irq); 2737 goto free_sg_list; 2738 } 2739 2740 /* 2741 * PCI IO register 2742 */ 2743 res = request_region(host->io_port, host->n_io_port, "nsp32"); 2744 if (res == NULL) { 2745 nsp32_msg(KERN_ERR, 2746 "I/O region 0x%lx+0x%lx is already used", 2747 data->BaseAddress, data->NumAddress); 2748 goto free_irq; 2749 } 2750 2751 ret = scsi_add_host(host, &pdev->dev); 2752 if (ret) { 2753 nsp32_msg(KERN_ERR, "failed to add scsi host"); 2754 goto free_region; 2755 } 2756 scsi_scan_host(host); 2757 pci_set_drvdata(pdev, host); 2758 return 0; 2759 2760 free_region: 2761 release_region(host->io_port, host->n_io_port); 2762 2763 free_irq: 2764 free_irq(host->irq, data); 2765 2766 free_sg_list: 2767 pci_free_consistent(pdev, NSP32_SG_TABLE_SIZE, 2768 data->sg_list, data->sg_paddr); 2769 2770 free_autoparam: 2771 pci_free_consistent(pdev, sizeof(nsp32_autoparam), 2772 data->autoparam, data->auto_paddr); 2773 2774 scsi_unregister: 2775 scsi_host_put(host); 2776 2777 err: 2778 return 1; 2779} 2780 2781static int nsp32_release(struct Scsi_Host *host) 2782{ 2783 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 2784 2785 if (data->autoparam) { 2786 pci_free_consistent(data->Pci, sizeof(nsp32_autoparam), 2787 data->autoparam, data->auto_paddr); 2788 } 2789 2790 if (data->sg_list) { 2791 pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE, 2792 data->sg_list, data->sg_paddr); 2793 } 2794 2795 if (host->irq) { 2796 free_irq(host->irq, data); 2797 } 2798 2799 if (host->io_port && host->n_io_port) { 2800 release_region(host->io_port, host->n_io_port); 2801 } 2802 2803 if (data->MmioAddress) { 2804 iounmap(data->MmioAddress); 2805 } 2806 2807 return 0; 2808} 2809 2810static const char *nsp32_info(struct Scsi_Host *shpnt) 2811{ 2812 nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata; 2813 2814 return data->info_str; 2815} 2816 2817 2818/**************************************************************************** 2819 * error handler 2820 */ 2821static int nsp32_eh_abort(struct scsi_cmnd *SCpnt) 2822{ 2823 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2824 unsigned int base = SCpnt->device->host->io_port; 2825 2826 nsp32_msg(KERN_WARNING, "abort"); 2827 2828 if (data->cur_lunt->SCpnt == NULL) { 2829 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed"); 2830 return FAILED; 2831 } 2832 2833 if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) { 2834 /* reset SDTR negotiation */ 2835 data->cur_target->sync_flag = 0; 2836 nsp32_set_async(data, data->cur_target); 2837 } 2838 2839 nsp32_write2(base, TRANSFER_CONTROL, 0); 2840 nsp32_write2(base, BM_CNT, 0); 2841 2842 SCpnt->result = DID_ABORT << 16; 2843 nsp32_scsi_done(SCpnt); 2844 2845 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success"); 2846 return SUCCESS; 2847} 2848 2849static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt) 2850{ 2851 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2852 unsigned int base = SCpnt->device->host->io_port; 2853 2854 spin_lock_irq(SCpnt->device->host->host_lock); 2855 2856 nsp32_msg(KERN_INFO, "Bus Reset"); 2857 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt); 2858 2859 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 2860 nsp32_do_bus_reset(data); 2861 nsp32_write2(base, IRQ_CONTROL, 0); 2862 2863 spin_unlock_irq(SCpnt->device->host->host_lock); 2864 return SUCCESS; /* SCSI bus reset is succeeded at any time. */ 2865} 2866 2867static void nsp32_do_bus_reset(nsp32_hw_data *data) 2868{ 2869 unsigned int base = data->BaseAddress; 2870 unsigned short intrdat; 2871 int i; 2872 2873 nsp32_dbg(NSP32_DEBUG_BUSRESET, "in"); 2874 2875 /* 2876 * stop all transfer 2877 * clear TRANSFERCONTROL_BM_START 2878 * clear counter 2879 */ 2880 nsp32_write2(base, TRANSFER_CONTROL, 0); 2881 nsp32_write4(base, BM_CNT, 0); 2882 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 2883 2884 /* 2885 * fall back to asynchronous transfer mode 2886 * initialize SDTR negotiation flag 2887 */ 2888 for (i = 0; i < ARRAY_SIZE(data->target); i++) { 2889 nsp32_target *target = &data->target[i]; 2890 2891 target->sync_flag = 0; 2892 nsp32_set_async(data, target); 2893 } 2894 2895 /* 2896 * reset SCSI bus 2897 */ 2898 nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST); 2899 mdelay(RESET_HOLD_TIME / 1000); 2900 nsp32_write1(base, SCSI_BUS_CONTROL, 0); 2901 for(i = 0; i < 5; i++) { 2902 intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */ 2903 nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat); 2904 } 2905 2906 data->CurrentSC = NULL; 2907} 2908 2909static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt) 2910{ 2911 struct Scsi_Host *host = SCpnt->device->host; 2912 unsigned int base = SCpnt->device->host->io_port; 2913 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 2914 2915 nsp32_msg(KERN_INFO, "Host Reset"); 2916 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt); 2917 2918 spin_lock_irq(SCpnt->device->host->host_lock); 2919 2920 nsp32hw_init(data); 2921 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 2922 nsp32_do_bus_reset(data); 2923 nsp32_write2(base, IRQ_CONTROL, 0); 2924 2925 spin_unlock_irq(SCpnt->device->host->host_lock); 2926 return SUCCESS; /* Host reset is succeeded at any time. */ 2927} 2928 2929 2930/************************************************************************** 2931 * EEPROM handler 2932 */ 2933 2934/* 2935 * getting EEPROM parameter 2936 */ 2937static int nsp32_getprom_param(nsp32_hw_data *data) 2938{ 2939 int vendor = data->pci_devid->vendor; 2940 int device = data->pci_devid->device; 2941 int ret, val, i; 2942 2943 /* 2944 * EEPROM checking. 2945 */ 2946 ret = nsp32_prom_read(data, 0x7e); 2947 if (ret != 0x55) { 2948 nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret); 2949 return FALSE; 2950 } 2951 ret = nsp32_prom_read(data, 0x7f); 2952 if (ret != 0xaa) { 2953 nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret); 2954 return FALSE; 2955 } 2956 2957 /* 2958 * check EEPROM type 2959 */ 2960 if (vendor == PCI_VENDOR_ID_WORKBIT && 2961 device == PCI_DEVICE_ID_WORKBIT_STANDARD) { 2962 ret = nsp32_getprom_c16(data); 2963 } else if (vendor == PCI_VENDOR_ID_WORKBIT && 2964 device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) { 2965 ret = nsp32_getprom_at24(data); 2966 } else if (vendor == PCI_VENDOR_ID_WORKBIT && 2967 device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) { 2968 ret = nsp32_getprom_at24(data); 2969 } else { 2970 nsp32_msg(KERN_WARNING, "Unknown EEPROM"); 2971 ret = FALSE; 2972 } 2973 2974 /* for debug : SPROM data full checking */ 2975 for (i = 0; i <= 0x1f; i++) { 2976 val = nsp32_prom_read(data, i); 2977 nsp32_dbg(NSP32_DEBUG_EEPROM, 2978 "rom address 0x%x : 0x%x", i, val); 2979 } 2980 2981 return ret; 2982} 2983 2984 2985/* 2986 * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map: 2987 * 2988 * ROMADDR 2989 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6) 2990 * Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M 2991 * 0x07 : HBA Synchronous Transfer Period 2992 * Value 0: AutoSync, 1: Manual Setting 2993 * 0x08 - 0x0f : Not Used? (0x0) 2994 * 0x10 : Bus Termination 2995 * Value 0: Auto[ON], 1: ON, 2: OFF 2996 * 0x11 : Not Used? (0) 2997 * 0x12 : Bus Reset Delay Time (0x03) 2998 * 0x13 : Bootable CD Support 2999 * Value 0: Disable, 1: Enable 3000 * 0x14 : Device Scan 3001 * Bit 7 6 5 4 3 2 1 0 3002 * | <-----------------> 3003 * | SCSI ID: Value 0: Skip, 1: YES 3004 * |-> Value 0: ALL scan, Value 1: Manual 3005 * 0x15 - 0x1b : Not Used? (0) 3006 * 0x1c : Constant? (0x01) (clock div?) 3007 * 0x1d - 0x7c : Not Used (0xff) 3008 * 0x7d : Not Used? (0xff) 3009 * 0x7e : Constant (0x55), Validity signature 3010 * 0x7f : Constant (0xaa), Validity signature 3011 */ 3012static int nsp32_getprom_at24(nsp32_hw_data *data) 3013{ 3014 int ret, i; 3015 int auto_sync; 3016 nsp32_target *target; 3017 int entry; 3018 3019 /* 3020 * Reset time which is designated by EEPROM. 3021 * 3022 * TODO: Not used yet. 3023 */ 3024 data->resettime = nsp32_prom_read(data, 0x12); 3025 3026 /* 3027 * HBA Synchronous Transfer Period 3028 * 3029 * Note: auto_sync = 0: auto, 1: manual. Ninja SCSI HBA spec says 3030 * that if auto_sync is 0 (auto), and connected SCSI devices are 3031 * same or lower than 3, then transfer speed is set as ULTRA-20M. 3032 * On the contrary if connected SCSI devices are same or higher 3033 * than 4, then transfer speed is set as FAST-10M. 3034 * 3035 * I break this rule. The number of connected SCSI devices are 3036 * only ignored. If auto_sync is 0 (auto), then transfer speed is 3037 * forced as ULTRA-20M. 3038 */ 3039 ret = nsp32_prom_read(data, 0x07); 3040 switch (ret) { 3041 case 0: 3042 auto_sync = TRUE; 3043 break; 3044 case 1: 3045 auto_sync = FALSE; 3046 break; 3047 default: 3048 nsp32_msg(KERN_WARNING, 3049 "Unsupported Auto Sync mode. Fall back to manual mode."); 3050 auto_sync = TRUE; 3051 } 3052 3053 if (trans_mode == ULTRA20M_MODE) { 3054 auto_sync = TRUE; 3055 } 3056 3057 /* 3058 * each device Synchronous Transfer Period 3059 */ 3060 for (i = 0; i < NSP32_HOST_SCSIID; i++) { 3061 target = &data->target[i]; 3062 if (auto_sync == TRUE) { 3063 target->limit_entry = 0; /* set as ULTRA20M */ 3064 } else { 3065 ret = nsp32_prom_read(data, i); 3066 entry = nsp32_search_period_entry(data, target, ret); 3067 if (entry < 0) { 3068 /* search failed... set maximum speed */ 3069 entry = 0; 3070 } 3071 target->limit_entry = entry; 3072 } 3073 } 3074 3075 return TRUE; 3076} 3077 3078 3079/* 3080 * C16 110 (I-O Data: SC-NBD) data map: 3081 * 3082 * ROMADDR 3083 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6) 3084 * Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC 3085 * 0x07 : 0 (HBA Synchronous Transfer Period: Auto Sync) 3086 * 0x08 - 0x0f : Not Used? (0x0) 3087 * 0x10 : Transfer Mode 3088 * Value 0: PIO, 1: Busmater 3089 * 0x11 : Bus Reset Delay Time (0x00-0x20) 3090 * 0x12 : Bus Termination 3091 * Value 0: Disable, 1: Enable 3092 * 0x13 - 0x19 : Disconnection 3093 * Value 0: Disable, 1: Enable 3094 * 0x1a - 0x7c : Not Used? (0) 3095 * 0x7d : Not Used? (0xf8) 3096 * 0x7e : Constant (0x55), Validity signature 3097 * 0x7f : Constant (0xaa), Validity signature 3098 */ 3099static int nsp32_getprom_c16(nsp32_hw_data *data) 3100{ 3101 int ret, i; 3102 nsp32_target *target; 3103 int entry, val; 3104 3105 /* 3106 * Reset time which is designated by EEPROM. 3107 * 3108 * TODO: Not used yet. 3109 */ 3110 data->resettime = nsp32_prom_read(data, 0x11); 3111 3112 /* 3113 * each device Synchronous Transfer Period 3114 */ 3115 for (i = 0; i < NSP32_HOST_SCSIID; i++) { 3116 target = &data->target[i]; 3117 ret = nsp32_prom_read(data, i); 3118 switch (ret) { 3119 case 0: /* 20MB/s */ 3120 val = 0x0c; 3121 break; 3122 case 1: /* 10MB/s */ 3123 val = 0x19; 3124 break; 3125 case 2: /* 5MB/s */ 3126 val = 0x32; 3127 break; 3128 case 3: /* ASYNC */ 3129 val = 0x00; 3130 break; 3131 default: /* default 20MB/s */ 3132 val = 0x0c; 3133 break; 3134 } 3135 entry = nsp32_search_period_entry(data, target, val); 3136 if (entry < 0 || trans_mode == ULTRA20M_MODE) { 3137 /* search failed... set maximum speed */ 3138 entry = 0; 3139 } 3140 target->limit_entry = entry; 3141 } 3142 3143 return TRUE; 3144} 3145 3146 3147/* 3148 * Atmel AT24C01A (drived in 5V) serial EEPROM routines 3149 */ 3150static int nsp32_prom_read(nsp32_hw_data *data, int romaddr) 3151{ 3152 int i, val; 3153 3154 /* start condition */ 3155 nsp32_prom_start(data); 3156 3157 /* device address */ 3158 nsp32_prom_write_bit(data, 1); /* 1 */ 3159 nsp32_prom_write_bit(data, 0); /* 0 */ 3160 nsp32_prom_write_bit(data, 1); /* 1 */ 3161 nsp32_prom_write_bit(data, 0); /* 0 */ 3162 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */ 3163 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */ 3164 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */ 3165 3166 /* R/W: W for dummy write */ 3167 nsp32_prom_write_bit(data, 0); 3168 3169 /* ack */ 3170 nsp32_prom_write_bit(data, 0); 3171 3172 /* word address */ 3173 for (i = 7; i >= 0; i--) { 3174 nsp32_prom_write_bit(data, ((romaddr >> i) & 1)); 3175 } 3176 3177 /* ack */ 3178 nsp32_prom_write_bit(data, 0); 3179 3180 /* start condition */ 3181 nsp32_prom_start(data); 3182 3183 /* device address */ 3184 nsp32_prom_write_bit(data, 1); /* 1 */ 3185 nsp32_prom_write_bit(data, 0); /* 0 */ 3186 nsp32_prom_write_bit(data, 1); /* 1 */ 3187 nsp32_prom_write_bit(data, 0); /* 0 */ 3188 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */ 3189 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */ 3190 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */ 3191 3192 /* R/W: R */ 3193 nsp32_prom_write_bit(data, 1); 3194 3195 /* ack */ 3196 nsp32_prom_write_bit(data, 0); 3197 3198 /* data... */ 3199 val = 0; 3200 for (i = 7; i >= 0; i--) { 3201 val += (nsp32_prom_read_bit(data) << i); 3202 } 3203 3204 /* no ack */ 3205 nsp32_prom_write_bit(data, 1); 3206 3207 /* stop condition */ 3208 nsp32_prom_stop(data); 3209 3210 return val; 3211} 3212 3213static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val) 3214{ 3215 int base = data->BaseAddress; 3216 int tmp; 3217 3218 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL); 3219 3220 if (val == 0) { 3221 tmp &= ~bit; 3222 } else { 3223 tmp |= bit; 3224 } 3225 3226 nsp32_index_write1(base, SERIAL_ROM_CTL, tmp); 3227 3228 udelay(10); 3229} 3230 3231static int nsp32_prom_get(nsp32_hw_data *data, int bit) 3232{ 3233 int base = data->BaseAddress; 3234 int tmp, ret; 3235 3236 if (bit != SDA) { 3237 nsp32_msg(KERN_ERR, "return value is not appropriate"); 3238 return 0; 3239 } 3240 3241 3242 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit; 3243 3244 if (tmp == 0) { 3245 ret = 0; 3246 } else { 3247 ret = 1; 3248 } 3249 3250 udelay(10); 3251 3252 return ret; 3253} 3254 3255static void nsp32_prom_start (nsp32_hw_data *data) 3256{ 3257 /* start condition */ 3258 nsp32_prom_set(data, SCL, 1); 3259 nsp32_prom_set(data, SDA, 1); 3260 nsp32_prom_set(data, ENA, 1); /* output mode */ 3261 nsp32_prom_set(data, SDA, 0); /* keeping SCL=1 and transiting 3262 * SDA 1->0 is start condition */ 3263 nsp32_prom_set(data, SCL, 0); 3264} 3265 3266static void nsp32_prom_stop (nsp32_hw_data *data) 3267{ 3268 /* stop condition */ 3269 nsp32_prom_set(data, SCL, 1); 3270 nsp32_prom_set(data, SDA, 0); 3271 nsp32_prom_set(data, ENA, 1); /* output mode */ 3272 nsp32_prom_set(data, SDA, 1); 3273 nsp32_prom_set(data, SCL, 0); 3274} 3275 3276static void nsp32_prom_write_bit(nsp32_hw_data *data, int val) 3277{ 3278 /* write */ 3279 nsp32_prom_set(data, SDA, val); 3280 nsp32_prom_set(data, SCL, 1 ); 3281 nsp32_prom_set(data, SCL, 0 ); 3282} 3283 3284static int nsp32_prom_read_bit(nsp32_hw_data *data) 3285{ 3286 int val; 3287 3288 /* read */ 3289 nsp32_prom_set(data, ENA, 0); /* input mode */ 3290 nsp32_prom_set(data, SCL, 1); 3291 3292 val = nsp32_prom_get(data, SDA); 3293 3294 nsp32_prom_set(data, SCL, 0); 3295 nsp32_prom_set(data, ENA, 1); /* output mode */ 3296 3297 return val; 3298} 3299 3300 3301/************************************************************************** 3302 * Power Management 3303 */ 3304#ifdef CONFIG_PM 3305 3306/* Device suspended */ 3307static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state) 3308{ 3309 struct Scsi_Host *host = pci_get_drvdata(pdev); 3310 3311 nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host); 3312 3313 pci_save_state (pdev); 3314 pci_disable_device (pdev); 3315 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 3316 3317 return 0; 3318} 3319 3320/* Device woken up */ 3321static int nsp32_resume(struct pci_dev *pdev) 3322{ 3323 struct Scsi_Host *host = pci_get_drvdata(pdev); 3324 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 3325 unsigned short reg; 3326 3327 nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host); 3328 3329 pci_set_power_state(pdev, PCI_D0); 3330 pci_enable_wake (pdev, PCI_D0, 0); 3331 pci_restore_state (pdev); 3332 3333 reg = nsp32_read2(data->BaseAddress, INDEX_REG); 3334 3335 nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg); 3336 3337 if (reg == 0xffff) { 3338 nsp32_msg(KERN_INFO, "missing device. abort resume."); 3339 return 0; 3340 } 3341 3342 nsp32hw_init (data); 3343 nsp32_do_bus_reset(data); 3344 3345 nsp32_msg(KERN_INFO, "resume success"); 3346 3347 return 0; 3348} 3349 3350#endif 3351 3352/************************************************************************ 3353 * PCI/Cardbus probe/remove routine 3354 */ 3355static int nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id) 3356{ 3357 int ret; 3358 nsp32_hw_data *data = &nsp32_data_base; 3359 3360 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 3361 3362 ret = pci_enable_device(pdev); 3363 if (ret) { 3364 nsp32_msg(KERN_ERR, "failed to enable pci device"); 3365 return ret; 3366 } 3367 3368 data->Pci = pdev; 3369 data->pci_devid = id; 3370 data->IrqNumber = pdev->irq; 3371 data->BaseAddress = pci_resource_start(pdev, 0); 3372 data->NumAddress = pci_resource_len (pdev, 0); 3373 data->MmioAddress = pci_ioremap_bar(pdev, 1); 3374 data->MmioLength = pci_resource_len (pdev, 1); 3375 3376 pci_set_master(pdev); 3377 3378 ret = nsp32_detect(pdev); 3379 3380 nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s", 3381 pdev->irq, 3382 data->MmioAddress, data->MmioLength, 3383 pci_name(pdev), 3384 nsp32_model[id->driver_data]); 3385 3386 nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret); 3387 3388 return ret; 3389} 3390 3391static void nsp32_remove(struct pci_dev *pdev) 3392{ 3393 struct Scsi_Host *host = pci_get_drvdata(pdev); 3394 3395 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 3396 3397 scsi_remove_host(host); 3398 3399 nsp32_release(host); 3400 3401 scsi_host_put(host); 3402} 3403 3404static struct pci_driver nsp32_driver = { 3405 .name = "nsp32", 3406 .id_table = nsp32_pci_table, 3407 .probe = nsp32_probe, 3408 .remove = nsp32_remove, 3409#ifdef CONFIG_PM 3410 .suspend = nsp32_suspend, 3411 .resume = nsp32_resume, 3412#endif 3413}; 3414 3415/********************************************************************* 3416 * Moule entry point 3417 */ 3418static int __init init_nsp32(void) { 3419 nsp32_msg(KERN_INFO, "loading..."); 3420 return pci_register_driver(&nsp32_driver); 3421} 3422 3423static void __exit exit_nsp32(void) { 3424 nsp32_msg(KERN_INFO, "unloading..."); 3425 pci_unregister_driver(&nsp32_driver); 3426} 3427 3428module_init(init_nsp32); 3429module_exit(exit_nsp32); 3430 3431/* end */ 3432