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#undef SPRINTF 1445#define SPRINTF(args...) seq_printf(m, ##args) 1446 1447static int nsp32_show_info(struct seq_file *m, struct Scsi_Host *host) 1448{ 1449 unsigned long flags; 1450 nsp32_hw_data *data; 1451 int hostno; 1452 unsigned int base; 1453 unsigned char mode_reg; 1454 int id, speed; 1455 long model; 1456 1457 hostno = host->host_no; 1458 data = (nsp32_hw_data *)host->hostdata; 1459 base = host->io_port; 1460 1461 SPRINTF("NinjaSCSI-32 status\n\n"); 1462 SPRINTF("Driver version: %s, $Revision: 1.33 $\n", nsp32_release_version); 1463 SPRINTF("SCSI host No.: %d\n", hostno); 1464 SPRINTF("IRQ: %d\n", host->irq); 1465 SPRINTF("IO: 0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1); 1466 SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1); 1467 SPRINTF("sg_tablesize: %d\n", host->sg_tablesize); 1468 SPRINTF("Chip revision: 0x%x\n", (nsp32_read2(base, INDEX_REG) >> 8) & 0xff); 1469 1470 mode_reg = nsp32_index_read1(base, CHIP_MODE); 1471 model = data->pci_devid->driver_data; 1472 1473#ifdef CONFIG_PM 1474 SPRINTF("Power Management: %s\n", (mode_reg & OPTF) ? "yes" : "no"); 1475#endif 1476 SPRINTF("OEM: %ld, %s\n", (mode_reg & (OEM0|OEM1)), nsp32_model[model]); 1477 1478 spin_lock_irqsave(&(data->Lock), flags); 1479 SPRINTF("CurrentSC: 0x%p\n\n", data->CurrentSC); 1480 spin_unlock_irqrestore(&(data->Lock), flags); 1481 1482 1483 SPRINTF("SDTR status\n"); 1484 for (id = 0; id < ARRAY_SIZE(data->target); id++) { 1485 1486 SPRINTF("id %d: ", id); 1487 1488 if (id == host->this_id) { 1489 SPRINTF("----- NinjaSCSI-32 host adapter\n"); 1490 continue; 1491 } 1492 1493 if (data->target[id].sync_flag == SDTR_DONE) { 1494 if (data->target[id].period == 0 && 1495 data->target[id].offset == ASYNC_OFFSET ) { 1496 SPRINTF("async"); 1497 } else { 1498 SPRINTF(" sync"); 1499 } 1500 } else { 1501 SPRINTF(" none"); 1502 } 1503 1504 if (data->target[id].period != 0) { 1505 1506 speed = 1000000 / (data->target[id].period * 4); 1507 1508 SPRINTF(" transfer %d.%dMB/s, offset %d", 1509 speed / 1000, 1510 speed % 1000, 1511 data->target[id].offset 1512 ); 1513 } 1514 SPRINTF("\n"); 1515 } 1516 return 0; 1517} 1518#undef SPRINTF 1519 1520 1521 1522/* 1523 * Reset parameters and call scsi_done for data->cur_lunt. 1524 * Be careful setting SCpnt->result = DID_* before calling this function. 1525 */ 1526static void nsp32_scsi_done(struct scsi_cmnd *SCpnt) 1527{ 1528 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1529 unsigned int base = SCpnt->device->host->io_port; 1530 1531 scsi_dma_unmap(SCpnt); 1532 1533 /* 1534 * clear TRANSFERCONTROL_BM_START 1535 */ 1536 nsp32_write2(base, TRANSFER_CONTROL, 0); 1537 nsp32_write4(base, BM_CNT, 0); 1538 1539 /* 1540 * call scsi_done 1541 */ 1542 (*SCpnt->scsi_done)(SCpnt); 1543 1544 /* 1545 * reset parameters 1546 */ 1547 data->cur_lunt->SCpnt = NULL; 1548 data->cur_lunt = NULL; 1549 data->cur_target = NULL; 1550 data->CurrentSC = NULL; 1551} 1552 1553 1554/* 1555 * Bus Free Occur 1556 * 1557 * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase 1558 * with ACK reply when below condition is matched: 1559 * MsgIn 00: Command Complete. 1560 * MsgIn 02: Save Data Pointer. 1561 * MsgIn 04: Diconnect. 1562 * In other case, unexpected BUSFREE is detected. 1563 */ 1564static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph) 1565{ 1566 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1567 unsigned int base = SCpnt->device->host->io_port; 1568 1569 nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph); 1570 show_autophase(execph); 1571 1572 nsp32_write4(base, BM_CNT, 0); 1573 nsp32_write2(base, TRANSFER_CONTROL, 0); 1574 1575 /* 1576 * MsgIn 02: Save Data Pointer 1577 * 1578 * VALID: 1579 * Save Data Pointer is received. Adjust pointer. 1580 * 1581 * NO-VALID: 1582 * SCSI-3 says if Save Data Pointer is not received, then we restart 1583 * processing and we can't adjust any SCSI data pointer in next data 1584 * phase. 1585 */ 1586 if (execph & MSGIN_02_VALID) { 1587 nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid"); 1588 1589 /* 1590 * Check sack_cnt/saved_sack_cnt, then adjust sg table if 1591 * needed. 1592 */ 1593 if (!(execph & MSGIN_00_VALID) && 1594 ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) { 1595 unsigned int sacklen, s_sacklen; 1596 1597 /* 1598 * Read SACK count and SAVEDSACK count, then compare. 1599 */ 1600 sacklen = nsp32_read4(base, SACK_CNT ); 1601 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT); 1602 1603 /* 1604 * If SAVEDSACKCNT == 0, it means SavedDataPointer is 1605 * come after data transferring. 1606 */ 1607 if (s_sacklen > 0) { 1608 /* 1609 * Comparing between sack and savedsack to 1610 * check the condition of AutoMsgIn03. 1611 * 1612 * If they are same, set msgin03 == TRUE, 1613 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at 1614 * reselection. On the other hand, if they 1615 * aren't same, set msgin03 == FALSE, and 1616 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at 1617 * reselection. 1618 */ 1619 if (sacklen != s_sacklen) { 1620 data->cur_lunt->msgin03 = FALSE; 1621 } else { 1622 data->cur_lunt->msgin03 = TRUE; 1623 } 1624 1625 nsp32_adjust_busfree(SCpnt, s_sacklen); 1626 } 1627 } 1628 1629 /* This value has not substitude with valid value yet... */ 1630 //data->cur_lunt->save_datp = data->cur_datp; 1631 } else { 1632 /* 1633 * no processing. 1634 */ 1635 } 1636 1637 if (execph & MSGIN_03_VALID) { 1638 /* MsgIn03 was valid to be processed. No need processing. */ 1639 } 1640 1641 /* 1642 * target SDTR check 1643 */ 1644 if (data->cur_target->sync_flag & SDTR_INITIATOR) { 1645 /* 1646 * SDTR negotiation pulled by the initiator has not 1647 * finished yet. Fall back to ASYNC mode. 1648 */ 1649 nsp32_set_async(data, data->cur_target); 1650 data->cur_target->sync_flag &= ~SDTR_INITIATOR; 1651 data->cur_target->sync_flag |= SDTR_DONE; 1652 } else if (data->cur_target->sync_flag & SDTR_TARGET) { 1653 /* 1654 * SDTR negotiation pulled by the target has been 1655 * negotiating. 1656 */ 1657 if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) { 1658 /* 1659 * If valid message is received, then 1660 * negotiation is succeeded. 1661 */ 1662 } else { 1663 /* 1664 * On the contrary, if unexpected bus free is 1665 * occurred, then negotiation is failed. Fall 1666 * back to ASYNC mode. 1667 */ 1668 nsp32_set_async(data, data->cur_target); 1669 } 1670 data->cur_target->sync_flag &= ~SDTR_TARGET; 1671 data->cur_target->sync_flag |= SDTR_DONE; 1672 } 1673 1674 /* 1675 * It is always ensured by SCSI standard that initiator 1676 * switches into Bus Free Phase after 1677 * receiving message 00 (Command Complete), 04 (Disconnect). 1678 * It's the reason that processing here is valid. 1679 */ 1680 if (execph & MSGIN_00_VALID) { 1681 /* MsgIn 00: Command Complete */ 1682 nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete"); 1683 1684 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1685 SCpnt->SCp.Message = 0; 1686 nsp32_dbg(NSP32_DEBUG_BUSFREE, 1687 "normal end stat=0x%x resid=0x%x\n", 1688 SCpnt->SCp.Status, scsi_get_resid(SCpnt)); 1689 SCpnt->result = (DID_OK << 16) | 1690 (SCpnt->SCp.Message << 8) | 1691 (SCpnt->SCp.Status << 0); 1692 nsp32_scsi_done(SCpnt); 1693 /* All operation is done */ 1694 return TRUE; 1695 } else if (execph & MSGIN_04_VALID) { 1696 /* MsgIn 04: Disconnect */ 1697 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN); 1698 SCpnt->SCp.Message = 4; 1699 1700 nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect"); 1701 return TRUE; 1702 } else { 1703 /* Unexpected bus free */ 1704 nsp32_msg(KERN_WARNING, "unexpected bus free occurred"); 1705 1706 /* DID_ERROR? */ 1707 //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0); 1708 SCpnt->result = DID_ERROR << 16; 1709 nsp32_scsi_done(SCpnt); 1710 return TRUE; 1711 } 1712 return FALSE; 1713} 1714 1715 1716/* 1717 * nsp32_adjust_busfree - adjusting SG table 1718 * 1719 * Note: This driver adjust the SG table using SCSI ACK 1720 * counter instead of BMCNT counter! 1721 */ 1722static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen) 1723{ 1724 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1725 int old_entry = data->cur_entry; 1726 int new_entry; 1727 int sg_num = data->cur_lunt->sg_num; 1728 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt; 1729 unsigned int restlen, sentlen; 1730 u32_le len, addr; 1731 1732 nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", scsi_get_resid(SCpnt)); 1733 1734 /* adjust saved SACK count with 4 byte start address boundary */ 1735 s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3; 1736 1737 /* 1738 * calculate new_entry from sack count and each sgt[].len 1739 * calculate the byte which is intent to send 1740 */ 1741 sentlen = 0; 1742 for (new_entry = old_entry; new_entry < sg_num; new_entry++) { 1743 sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND); 1744 if (sentlen > s_sacklen) { 1745 break; 1746 } 1747 } 1748 1749 /* all sgt is processed */ 1750 if (new_entry == sg_num) { 1751 goto last; 1752 } 1753 1754 if (sentlen == s_sacklen) { 1755 /* XXX: confirm it's ok or not */ 1756 /* In this case, it's ok because we are at 1757 the head element of the sg. restlen is correctly calculated. */ 1758 } 1759 1760 /* calculate the rest length for transferring */ 1761 restlen = sentlen - s_sacklen; 1762 1763 /* update adjusting current SG table entry */ 1764 len = le32_to_cpu(sgt[new_entry].len); 1765 addr = le32_to_cpu(sgt[new_entry].addr); 1766 addr += (len - restlen); 1767 sgt[new_entry].addr = cpu_to_le32(addr); 1768 sgt[new_entry].len = cpu_to_le32(restlen); 1769 1770 /* set cur_entry with new_entry */ 1771 data->cur_entry = new_entry; 1772 1773 return; 1774 1775 last: 1776 if (scsi_get_resid(SCpnt) < sentlen) { 1777 nsp32_msg(KERN_ERR, "resid underflow"); 1778 } 1779 1780 scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) - sentlen); 1781 nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", scsi_get_resid(SCpnt)); 1782 1783 /* update hostdata and lun */ 1784 1785 return; 1786} 1787 1788 1789/* 1790 * It's called MsgOut phase occur. 1791 * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in 1792 * message out phase. It, however, has more than 3 messages, 1793 * HBA creates the interrupt and we have to process by hand. 1794 */ 1795static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt) 1796{ 1797 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1798 unsigned int base = SCpnt->device->host->io_port; 1799 //unsigned short command; 1800 long new_sgtp; 1801 int i; 1802 1803 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, 1804 "enter: msgout_len: 0x%x", data->msgout_len); 1805 1806 /* 1807 * If MsgOut phase is occurred without having any 1808 * message, then No_Operation is sent (SCSI-2). 1809 */ 1810 if (data->msgout_len == 0) { 1811 nsp32_build_nop(SCpnt); 1812 } 1813 1814 /* 1815 * Set SGTP ADDR current entry for restarting AUTOSCSI, 1816 * because SGTP is incremented next point. 1817 * There is few statement in the specification... 1818 */ 1819 new_sgtp = data->cur_lunt->sglun_paddr + 1820 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable)); 1821 1822 /* 1823 * send messages 1824 */ 1825 for (i = 0; i < data->msgout_len; i++) { 1826 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, 1827 "%d : 0x%x", i, data->msgoutbuf[i]); 1828 1829 /* 1830 * Check REQ is asserted. 1831 */ 1832 nsp32_wait_req(data, ASSERT); 1833 1834 if (i == (data->msgout_len - 1)) { 1835 /* 1836 * If the last message, set the AutoSCSI restart 1837 * before send back the ack message. AutoSCSI 1838 * restart automatically negate ATN signal. 1839 */ 1840 //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02); 1841 //nsp32_restart_autoscsi(SCpnt, command); 1842 nsp32_write2(base, COMMAND_CONTROL, 1843 (CLEAR_CDB_FIFO_POINTER | 1844 AUTO_COMMAND_PHASE | 1845 AUTOSCSI_RESTART | 1846 AUTO_MSGIN_00_OR_04 | 1847 AUTO_MSGIN_02 )); 1848 } 1849 /* 1850 * Write data with SACK, then wait sack is 1851 * automatically negated. 1852 */ 1853 nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]); 1854 nsp32_wait_sack(data, NEGATE); 1855 1856 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n", 1857 nsp32_read1(base, SCSI_BUS_MONITOR)); 1858 }; 1859 1860 data->msgout_len = 0; 1861 1862 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit"); 1863} 1864 1865/* 1866 * Restart AutoSCSI 1867 * 1868 * Note: Restarting AutoSCSI needs set: 1869 * SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL 1870 */ 1871static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command) 1872{ 1873 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1874 unsigned int base = data->BaseAddress; 1875 unsigned short transfer = 0; 1876 1877 nsp32_dbg(NSP32_DEBUG_RESTART, "enter"); 1878 1879 if (data->cur_target == NULL || data->cur_lunt == NULL) { 1880 nsp32_msg(KERN_ERR, "Target or Lun is invalid"); 1881 } 1882 1883 /* 1884 * set SYNC_REG 1885 * Don't set BM_START_ADR before setting this register. 1886 */ 1887 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg); 1888 1889 /* 1890 * set ACKWIDTH 1891 */ 1892 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth); 1893 1894 /* 1895 * set SREQ hazard killer sampling rate 1896 */ 1897 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg); 1898 1899 /* 1900 * set SGT ADDR (physical address) 1901 */ 1902 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr); 1903 1904 /* 1905 * set TRANSFER CONTROL REG 1906 */ 1907 transfer = 0; 1908 transfer |= (TRANSFER_GO | ALL_COUNTER_CLR); 1909 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) { 1910 if (scsi_bufflen(SCpnt) > 0) { 1911 transfer |= BM_START; 1912 } 1913 } else if (data->trans_method & NSP32_TRANSFER_MMIO) { 1914 transfer |= CB_MMIO_MODE; 1915 } else if (data->trans_method & NSP32_TRANSFER_PIO) { 1916 transfer |= CB_IO_MODE; 1917 } 1918 nsp32_write2(base, TRANSFER_CONTROL, transfer); 1919 1920 /* 1921 * restart AutoSCSI 1922 * 1923 * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ? 1924 */ 1925 command |= (CLEAR_CDB_FIFO_POINTER | 1926 AUTO_COMMAND_PHASE | 1927 AUTOSCSI_RESTART ); 1928 nsp32_write2(base, COMMAND_CONTROL, command); 1929 1930 nsp32_dbg(NSP32_DEBUG_RESTART, "exit"); 1931} 1932 1933 1934/* 1935 * cannot run automatically message in occur 1936 */ 1937static void nsp32_msgin_occur(struct scsi_cmnd *SCpnt, 1938 unsigned long irq_status, 1939 unsigned short execph) 1940{ 1941 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 1942 unsigned int base = SCpnt->device->host->io_port; 1943 unsigned char msg; 1944 unsigned char msgtype; 1945 unsigned char newlun; 1946 unsigned short command = 0; 1947 int msgclear = TRUE; 1948 long new_sgtp; 1949 int ret; 1950 1951 /* 1952 * read first message 1953 * Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure 1954 * of Message-In have to be processed before sending back SCSI ACK. 1955 */ 1956 msg = nsp32_read1(base, SCSI_DATA_IN); 1957 data->msginbuf[(unsigned char)data->msgin_len] = msg; 1958 msgtype = data->msginbuf[0]; 1959 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, 1960 "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x", 1961 data->msgin_len, msg, msgtype); 1962 1963 /* 1964 * TODO: We need checking whether bus phase is message in? 1965 */ 1966 1967 /* 1968 * assert SCSI ACK 1969 */ 1970 nsp32_sack_assert(data); 1971 1972 /* 1973 * processing IDENTIFY 1974 */ 1975 if (msgtype & 0x80) { 1976 if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) { 1977 /* Invalid (non reselect) phase */ 1978 goto reject; 1979 } 1980 1981 newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */ 1982 ret = nsp32_reselection(SCpnt, newlun); 1983 if (ret == TRUE) { 1984 goto restart; 1985 } else { 1986 goto reject; 1987 } 1988 } 1989 1990 /* 1991 * processing messages except for IDENTIFY 1992 * 1993 * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO. 1994 */ 1995 switch (msgtype) { 1996 /* 1997 * 1-byte message 1998 */ 1999 case COMMAND_COMPLETE: 2000 case DISCONNECT: 2001 /* 2002 * These messages should not be occurred. 2003 * They should be processed on AutoSCSI sequencer. 2004 */ 2005 nsp32_msg(KERN_WARNING, 2006 "unexpected message of AutoSCSI MsgIn: 0x%x", msg); 2007 break; 2008 2009 case RESTORE_POINTERS: 2010 /* 2011 * AutoMsgIn03 is disabled, and HBA gets this message. 2012 */ 2013 2014 if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) { 2015 unsigned int s_sacklen; 2016 2017 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT); 2018 if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) { 2019 nsp32_adjust_busfree(SCpnt, s_sacklen); 2020 } else { 2021 /* No need to rewrite SGT */ 2022 } 2023 } 2024 data->cur_lunt->msgin03 = FALSE; 2025 2026 /* Update with the new value */ 2027 2028 /* reset SACK/SavedACK counter (or ALL clear?) */ 2029 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 2030 2031 /* 2032 * set new sg pointer 2033 */ 2034 new_sgtp = data->cur_lunt->sglun_paddr + 2035 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable)); 2036 nsp32_write4(base, SGT_ADR, new_sgtp); 2037 2038 break; 2039 2040 case SAVE_POINTERS: 2041 /* 2042 * These messages should not be occurred. 2043 * They should be processed on AutoSCSI sequencer. 2044 */ 2045 nsp32_msg (KERN_WARNING, 2046 "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS"); 2047 2048 break; 2049 2050 case MESSAGE_REJECT: 2051 /* If previous message_out is sending SDTR, and get 2052 message_reject from target, SDTR negotiation is failed */ 2053 if (data->cur_target->sync_flag & 2054 (SDTR_INITIATOR | SDTR_TARGET)) { 2055 /* 2056 * Current target is negotiating SDTR, but it's 2057 * failed. Fall back to async transfer mode, and set 2058 * SDTR_DONE. 2059 */ 2060 nsp32_set_async(data, data->cur_target); 2061 data->cur_target->sync_flag &= ~SDTR_INITIATOR; 2062 data->cur_target->sync_flag |= SDTR_DONE; 2063 2064 } 2065 break; 2066 2067 case LINKED_CMD_COMPLETE: 2068 case LINKED_FLG_CMD_COMPLETE: 2069 /* queue tag is not supported currently */ 2070 nsp32_msg (KERN_WARNING, 2071 "unsupported message: 0x%x", msgtype); 2072 break; 2073 2074 case INITIATE_RECOVERY: 2075 /* staring ECA (Extended Contingent Allegiance) state. */ 2076 /* This message is declined in SPI2 or later. */ 2077 2078 goto reject; 2079 2080 /* 2081 * 2-byte message 2082 */ 2083 case SIMPLE_QUEUE_TAG: 2084 case 0x23: 2085 /* 2086 * 0x23: Ignore_Wide_Residue is not declared in scsi.h. 2087 * No support is needed. 2088 */ 2089 if (data->msgin_len >= 1) { 2090 goto reject; 2091 } 2092 2093 /* current position is 1-byte of 2 byte */ 2094 msgclear = FALSE; 2095 2096 break; 2097 2098 /* 2099 * extended message 2100 */ 2101 case EXTENDED_MESSAGE: 2102 if (data->msgin_len < 1) { 2103 /* 2104 * Current position does not reach 2-byte 2105 * (2-byte is extended message length). 2106 */ 2107 msgclear = FALSE; 2108 break; 2109 } 2110 2111 if ((data->msginbuf[1] + 1) > data->msgin_len) { 2112 /* 2113 * Current extended message has msginbuf[1] + 2 2114 * (msgin_len starts counting from 0, so buf[1] + 1). 2115 * If current message position is not finished, 2116 * continue receiving message. 2117 */ 2118 msgclear = FALSE; 2119 break; 2120 } 2121 2122 /* 2123 * Reach here means regular length of each type of 2124 * extended messages. 2125 */ 2126 switch (data->msginbuf[2]) { 2127 case EXTENDED_MODIFY_DATA_POINTER: 2128 /* TODO */ 2129 goto reject; /* not implemented yet */ 2130 break; 2131 2132 case EXTENDED_SDTR: 2133 /* 2134 * Exchange this message between initiator and target. 2135 */ 2136 if (data->msgin_len != EXTENDED_SDTR_LEN + 1) { 2137 /* 2138 * received inappropriate message. 2139 */ 2140 goto reject; 2141 break; 2142 } 2143 2144 nsp32_analyze_sdtr(SCpnt); 2145 2146 break; 2147 2148 case EXTENDED_EXTENDED_IDENTIFY: 2149 /* SCSI-I only, not supported. */ 2150 goto reject; /* not implemented yet */ 2151 2152 break; 2153 2154 case EXTENDED_WDTR: 2155 goto reject; /* not implemented yet */ 2156 2157 break; 2158 2159 default: 2160 goto reject; 2161 } 2162 break; 2163 2164 default: 2165 goto reject; 2166 } 2167 2168 restart: 2169 if (msgclear == TRUE) { 2170 data->msgin_len = 0; 2171 2172 /* 2173 * If restarting AutoSCSI, but there are some message to out 2174 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0 2175 * (MV_VALID = 0). When commandcontrol is written with 2176 * AutoSCSI restart, at the same time MsgOutOccur should be 2177 * happened (however, such situation is really possible...?). 2178 */ 2179 if (data->msgout_len > 0) { 2180 nsp32_write4(base, SCSI_MSG_OUT, 0); 2181 command |= AUTO_ATN; 2182 } 2183 2184 /* 2185 * restart AutoSCSI 2186 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed. 2187 */ 2188 command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02); 2189 2190 /* 2191 * If current msgin03 is TRUE, then flag on. 2192 */ 2193 if (data->cur_lunt->msgin03 == TRUE) { 2194 command |= AUTO_MSGIN_03; 2195 } 2196 data->cur_lunt->msgin03 = FALSE; 2197 } else { 2198 data->msgin_len++; 2199 } 2200 2201 /* 2202 * restart AutoSCSI 2203 */ 2204 nsp32_restart_autoscsi(SCpnt, command); 2205 2206 /* 2207 * wait SCSI REQ negate for REQ-ACK handshake 2208 */ 2209 nsp32_wait_req(data, NEGATE); 2210 2211 /* 2212 * negate SCSI ACK 2213 */ 2214 nsp32_sack_negate(data); 2215 2216 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit"); 2217 2218 return; 2219 2220 reject: 2221 nsp32_msg(KERN_WARNING, 2222 "invalid or unsupported MessageIn, rejected. " 2223 "current msg: 0x%x (len: 0x%x), processing msg: 0x%x", 2224 msg, data->msgin_len, msgtype); 2225 nsp32_build_reject(SCpnt); 2226 data->msgin_len = 0; 2227 2228 goto restart; 2229} 2230 2231/* 2232 * 2233 */ 2234static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt) 2235{ 2236 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2237 nsp32_target *target = data->cur_target; 2238 nsp32_sync_table *synct; 2239 unsigned char get_period = data->msginbuf[3]; 2240 unsigned char get_offset = data->msginbuf[4]; 2241 int entry; 2242 int syncnum; 2243 2244 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter"); 2245 2246 synct = data->synct; 2247 syncnum = data->syncnum; 2248 2249 /* 2250 * If this inititor sent the SDTR message, then target responds SDTR, 2251 * initiator SYNCREG, ACKWIDTH from SDTR parameter. 2252 * Messages are not appropriate, then send back reject message. 2253 * If initiator did not send the SDTR, but target sends SDTR, 2254 * initiator calculator the appropriate parameter and send back SDTR. 2255 */ 2256 if (target->sync_flag & SDTR_INITIATOR) { 2257 /* 2258 * Initiator sent SDTR, the target responds and 2259 * send back negotiation SDTR. 2260 */ 2261 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR"); 2262 2263 target->sync_flag &= ~SDTR_INITIATOR; 2264 target->sync_flag |= SDTR_DONE; 2265 2266 /* 2267 * offset: 2268 */ 2269 if (get_offset > SYNC_OFFSET) { 2270 /* 2271 * Negotiation is failed, the target send back 2272 * unexpected offset value. 2273 */ 2274 goto reject; 2275 } 2276 2277 if (get_offset == ASYNC_OFFSET) { 2278 /* 2279 * Negotiation is succeeded, the target want 2280 * to fall back into asynchronous transfer mode. 2281 */ 2282 goto async; 2283 } 2284 2285 /* 2286 * period: 2287 * Check whether sync period is too short. If too short, 2288 * fall back to async mode. If it's ok, then investigate 2289 * the received sync period. If sync period is acceptable 2290 * between sync table start_period and end_period, then 2291 * set this I_T nexus as sent offset and period. 2292 * If it's not acceptable, send back reject and fall back 2293 * to async mode. 2294 */ 2295 if (get_period < data->synct[0].period_num) { 2296 /* 2297 * Negotiation is failed, the target send back 2298 * unexpected period value. 2299 */ 2300 goto reject; 2301 } 2302 2303 entry = nsp32_search_period_entry(data, target, get_period); 2304 2305 if (entry < 0) { 2306 /* 2307 * Target want to use long period which is not 2308 * acceptable NinjaSCSI-32Bi/UDE. 2309 */ 2310 goto reject; 2311 } 2312 2313 /* 2314 * Set new sync table and offset in this I_T nexus. 2315 */ 2316 nsp32_set_sync_entry(data, target, entry, get_offset); 2317 } else { 2318 /* Target send SDTR to initiator. */ 2319 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR"); 2320 2321 target->sync_flag |= SDTR_INITIATOR; 2322 2323 /* offset: */ 2324 if (get_offset > SYNC_OFFSET) { 2325 /* send back as SYNC_OFFSET */ 2326 get_offset = SYNC_OFFSET; 2327 } 2328 2329 /* period: */ 2330 if (get_period < data->synct[0].period_num) { 2331 get_period = data->synct[0].period_num; 2332 } 2333 2334 entry = nsp32_search_period_entry(data, target, get_period); 2335 2336 if (get_offset == ASYNC_OFFSET || entry < 0) { 2337 nsp32_set_async(data, target); 2338 nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET); 2339 } else { 2340 nsp32_set_sync_entry(data, target, entry, get_offset); 2341 nsp32_build_sdtr(SCpnt, get_period, get_offset); 2342 } 2343 } 2344 2345 target->period = get_period; 2346 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit"); 2347 return; 2348 2349 reject: 2350 /* 2351 * If the current message is unacceptable, send back to the target 2352 * with reject message. 2353 */ 2354 nsp32_build_reject(SCpnt); 2355 2356 async: 2357 nsp32_set_async(data, target); /* set as ASYNC transfer mode */ 2358 2359 target->period = 0; 2360 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async"); 2361 return; 2362} 2363 2364 2365/* 2366 * Search config entry number matched in sync_table from given 2367 * target and speed period value. If failed to search, return negative value. 2368 */ 2369static int nsp32_search_period_entry(nsp32_hw_data *data, 2370 nsp32_target *target, 2371 unsigned char period) 2372{ 2373 int i; 2374 2375 if (target->limit_entry >= data->syncnum) { 2376 nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!"); 2377 target->limit_entry = 0; 2378 } 2379 2380 for (i = target->limit_entry; i < data->syncnum; i++) { 2381 if (period >= data->synct[i].start_period && 2382 period <= data->synct[i].end_period) { 2383 break; 2384 } 2385 } 2386 2387 /* 2388 * Check given period value is over the sync_table value. 2389 * If so, return max value. 2390 */ 2391 if (i == data->syncnum) { 2392 i = -1; 2393 } 2394 2395 return i; 2396} 2397 2398 2399/* 2400 * target <-> initiator use ASYNC transfer 2401 */ 2402static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target) 2403{ 2404 unsigned char period = data->synct[target->limit_entry].period_num; 2405 2406 target->offset = ASYNC_OFFSET; 2407 target->period = 0; 2408 target->syncreg = TO_SYNCREG(period, ASYNC_OFFSET); 2409 target->ackwidth = 0; 2410 target->sample_reg = 0; 2411 2412 nsp32_dbg(NSP32_DEBUG_SYNC, "set async"); 2413} 2414 2415 2416/* 2417 * target <-> initiator use maximum SYNC transfer 2418 */ 2419static void nsp32_set_max_sync(nsp32_hw_data *data, 2420 nsp32_target *target, 2421 unsigned char *period, 2422 unsigned char *offset) 2423{ 2424 unsigned char period_num, ackwidth; 2425 2426 period_num = data->synct[target->limit_entry].period_num; 2427 *period = data->synct[target->limit_entry].start_period; 2428 ackwidth = data->synct[target->limit_entry].ackwidth; 2429 *offset = SYNC_OFFSET; 2430 2431 target->syncreg = TO_SYNCREG(period_num, *offset); 2432 target->ackwidth = ackwidth; 2433 target->offset = *offset; 2434 target->sample_reg = 0; /* disable SREQ sampling */ 2435} 2436 2437 2438/* 2439 * target <-> initiator use entry number speed 2440 */ 2441static void nsp32_set_sync_entry(nsp32_hw_data *data, 2442 nsp32_target *target, 2443 int entry, 2444 unsigned char offset) 2445{ 2446 unsigned char period, ackwidth, sample_rate; 2447 2448 period = data->synct[entry].period_num; 2449 ackwidth = data->synct[entry].ackwidth; 2450 offset = offset; 2451 sample_rate = data->synct[entry].sample_rate; 2452 2453 target->syncreg = TO_SYNCREG(period, offset); 2454 target->ackwidth = ackwidth; 2455 target->offset = offset; 2456 target->sample_reg = sample_rate | SAMPLING_ENABLE; 2457 2458 nsp32_dbg(NSP32_DEBUG_SYNC, "set sync"); 2459} 2460 2461 2462/* 2463 * It waits until SCSI REQ becomes assertion or negation state. 2464 * 2465 * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then 2466 * connected target responds SCSI REQ negation. We have to wait 2467 * SCSI REQ becomes negation in order to negate SCSI ACK signal for 2468 * REQ-ACK handshake. 2469 */ 2470static void nsp32_wait_req(nsp32_hw_data *data, int state) 2471{ 2472 unsigned int base = data->BaseAddress; 2473 int wait_time = 0; 2474 unsigned char bus, req_bit; 2475 2476 if (!((state == ASSERT) || (state == NEGATE))) { 2477 nsp32_msg(KERN_ERR, "unknown state designation"); 2478 } 2479 /* REQ is BIT(5) */ 2480 req_bit = (state == ASSERT ? BUSMON_REQ : 0); 2481 2482 do { 2483 bus = nsp32_read1(base, SCSI_BUS_MONITOR); 2484 if ((bus & BUSMON_REQ) == req_bit) { 2485 nsp32_dbg(NSP32_DEBUG_WAIT, 2486 "wait_time: %d", wait_time); 2487 return; 2488 } 2489 udelay(1); 2490 wait_time++; 2491 } while (wait_time < REQSACK_TIMEOUT_TIME); 2492 2493 nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit); 2494} 2495 2496/* 2497 * It waits until SCSI SACK becomes assertion or negation state. 2498 */ 2499static void nsp32_wait_sack(nsp32_hw_data *data, int state) 2500{ 2501 unsigned int base = data->BaseAddress; 2502 int wait_time = 0; 2503 unsigned char bus, ack_bit; 2504 2505 if (!((state == ASSERT) || (state == NEGATE))) { 2506 nsp32_msg(KERN_ERR, "unknown state designation"); 2507 } 2508 /* ACK is BIT(4) */ 2509 ack_bit = (state == ASSERT ? BUSMON_ACK : 0); 2510 2511 do { 2512 bus = nsp32_read1(base, SCSI_BUS_MONITOR); 2513 if ((bus & BUSMON_ACK) == ack_bit) { 2514 nsp32_dbg(NSP32_DEBUG_WAIT, 2515 "wait_time: %d", wait_time); 2516 return; 2517 } 2518 udelay(1); 2519 wait_time++; 2520 } while (wait_time < REQSACK_TIMEOUT_TIME); 2521 2522 nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit); 2523} 2524 2525/* 2526 * assert SCSI ACK 2527 * 2528 * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1. 2529 */ 2530static void nsp32_sack_assert(nsp32_hw_data *data) 2531{ 2532 unsigned int base = data->BaseAddress; 2533 unsigned char busctrl; 2534 2535 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL); 2536 busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB); 2537 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl); 2538} 2539 2540/* 2541 * negate SCSI ACK 2542 */ 2543static void nsp32_sack_negate(nsp32_hw_data *data) 2544{ 2545 unsigned int base = data->BaseAddress; 2546 unsigned char busctrl; 2547 2548 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL); 2549 busctrl &= ~BUSCTL_ACK; 2550 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl); 2551} 2552 2553 2554 2555/* 2556 * Note: n_io_port is defined as 0x7f because I/O register port is 2557 * assigned as: 2558 * 0x800-0x8ff: memory mapped I/O port 2559 * 0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly) 2560 * 0xc00-0xfff: CardBus status registers 2561 */ 2562static int nsp32_detect(struct pci_dev *pdev) 2563{ 2564 struct Scsi_Host *host; /* registered host structure */ 2565 struct resource *res; 2566 nsp32_hw_data *data; 2567 int ret; 2568 int i, j; 2569 2570 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 2571 2572 /* 2573 * register this HBA as SCSI device 2574 */ 2575 host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data)); 2576 if (host == NULL) { 2577 nsp32_msg (KERN_ERR, "failed to scsi register"); 2578 goto err; 2579 } 2580 2581 /* 2582 * set nsp32_hw_data 2583 */ 2584 data = (nsp32_hw_data *)host->hostdata; 2585 2586 memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data)); 2587 2588 host->irq = data->IrqNumber; 2589 host->io_port = data->BaseAddress; 2590 host->unique_id = data->BaseAddress; 2591 host->n_io_port = data->NumAddress; 2592 host->base = (unsigned long)data->MmioAddress; 2593 2594 data->Host = host; 2595 spin_lock_init(&(data->Lock)); 2596 2597 data->cur_lunt = NULL; 2598 data->cur_target = NULL; 2599 2600 /* 2601 * Bus master transfer mode is supported currently. 2602 */ 2603 data->trans_method = NSP32_TRANSFER_BUSMASTER; 2604 2605 /* 2606 * Set clock div, CLOCK_4 (HBA has own external clock, and 2607 * dividing * 100ns/4). 2608 * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet. 2609 */ 2610 data->clock = CLOCK_4; 2611 2612 /* 2613 * Select appropriate nsp32_sync_table and set I_CLOCKDIV. 2614 */ 2615 switch (data->clock) { 2616 case CLOCK_4: 2617 /* If data->clock is CLOCK_4, then select 40M sync table. */ 2618 data->synct = nsp32_sync_table_40M; 2619 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M); 2620 break; 2621 case CLOCK_2: 2622 /* If data->clock is CLOCK_2, then select 20M sync table. */ 2623 data->synct = nsp32_sync_table_20M; 2624 data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M); 2625 break; 2626 case PCICLK: 2627 /* If data->clock is PCICLK, then select pci sync table. */ 2628 data->synct = nsp32_sync_table_pci; 2629 data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci); 2630 break; 2631 default: 2632 nsp32_msg(KERN_WARNING, 2633 "Invalid clock div is selected, set CLOCK_4."); 2634 /* Use default value CLOCK_4 */ 2635 data->clock = CLOCK_4; 2636 data->synct = nsp32_sync_table_40M; 2637 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M); 2638 } 2639 2640 /* 2641 * setup nsp32_lunt 2642 */ 2643 2644 /* 2645 * setup DMA 2646 */ 2647 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) { 2648 nsp32_msg (KERN_ERR, "failed to set PCI DMA mask"); 2649 goto scsi_unregister; 2650 } 2651 2652 /* 2653 * allocate autoparam DMA resource. 2654 */ 2655 data->autoparam = pci_alloc_consistent(pdev, sizeof(nsp32_autoparam), &(data->auto_paddr)); 2656 if (data->autoparam == NULL) { 2657 nsp32_msg(KERN_ERR, "failed to allocate DMA memory"); 2658 goto scsi_unregister; 2659 } 2660 2661 /* 2662 * allocate scatter-gather DMA resource. 2663 */ 2664 data->sg_list = pci_alloc_consistent(pdev, NSP32_SG_TABLE_SIZE, 2665 &(data->sg_paddr)); 2666 if (data->sg_list == NULL) { 2667 nsp32_msg(KERN_ERR, "failed to allocate DMA memory"); 2668 goto free_autoparam; 2669 } 2670 2671 for (i = 0; i < ARRAY_SIZE(data->lunt); i++) { 2672 for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) { 2673 int offset = i * ARRAY_SIZE(data->lunt[0]) + j; 2674 nsp32_lunt tmp = { 2675 .SCpnt = NULL, 2676 .save_datp = 0, 2677 .msgin03 = FALSE, 2678 .sg_num = 0, 2679 .cur_entry = 0, 2680 .sglun = &(data->sg_list[offset]), 2681 .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)), 2682 }; 2683 2684 data->lunt[i][j] = tmp; 2685 } 2686 } 2687 2688 /* 2689 * setup target 2690 */ 2691 for (i = 0; i < ARRAY_SIZE(data->target); i++) { 2692 nsp32_target *target = &(data->target[i]); 2693 2694 target->limit_entry = 0; 2695 target->sync_flag = 0; 2696 nsp32_set_async(data, target); 2697 } 2698 2699 /* 2700 * EEPROM check 2701 */ 2702 ret = nsp32_getprom_param(data); 2703 if (ret == FALSE) { 2704 data->resettime = 3; /* default 3 */ 2705 } 2706 2707 /* 2708 * setup HBA 2709 */ 2710 nsp32hw_init(data); 2711 2712 snprintf(data->info_str, sizeof(data->info_str), 2713 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x", 2714 host->irq, host->io_port, host->n_io_port); 2715 2716 /* 2717 * SCSI bus reset 2718 * 2719 * Note: It's important to reset SCSI bus in initialization phase. 2720 * NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when 2721 * system is coming up, so SCSI devices connected to HBA is set as 2722 * un-asynchronous mode. It brings the merit that this HBA is 2723 * ready to start synchronous transfer without any preparation, 2724 * but we are difficult to control transfer speed. In addition, 2725 * it prevents device transfer speed from effecting EEPROM start-up 2726 * SDTR. NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as 2727 * Auto Mode, then FAST-10M is selected when SCSI devices are 2728 * connected same or more than 4 devices. It should be avoided 2729 * depending on this specification. Thus, resetting the SCSI bus 2730 * restores all connected SCSI devices to asynchronous mode, then 2731 * this driver set SDTR safely later, and we can control all SCSI 2732 * device transfer mode. 2733 */ 2734 nsp32_do_bus_reset(data); 2735 2736 ret = request_irq(host->irq, do_nsp32_isr, IRQF_SHARED, "nsp32", data); 2737 if (ret < 0) { 2738 nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 " 2739 "SCSI PCI controller. Interrupt: %d", host->irq); 2740 goto free_sg_list; 2741 } 2742 2743 /* 2744 * PCI IO register 2745 */ 2746 res = request_region(host->io_port, host->n_io_port, "nsp32"); 2747 if (res == NULL) { 2748 nsp32_msg(KERN_ERR, 2749 "I/O region 0x%lx+0x%lx is already used", 2750 data->BaseAddress, data->NumAddress); 2751 goto free_irq; 2752 } 2753 2754 ret = scsi_add_host(host, &pdev->dev); 2755 if (ret) { 2756 nsp32_msg(KERN_ERR, "failed to add scsi host"); 2757 goto free_region; 2758 } 2759 scsi_scan_host(host); 2760 pci_set_drvdata(pdev, host); 2761 return 0; 2762 2763 free_region: 2764 release_region(host->io_port, host->n_io_port); 2765 2766 free_irq: 2767 free_irq(host->irq, data); 2768 2769 free_sg_list: 2770 pci_free_consistent(pdev, NSP32_SG_TABLE_SIZE, 2771 data->sg_list, data->sg_paddr); 2772 2773 free_autoparam: 2774 pci_free_consistent(pdev, sizeof(nsp32_autoparam), 2775 data->autoparam, data->auto_paddr); 2776 2777 scsi_unregister: 2778 scsi_host_put(host); 2779 2780 err: 2781 return 1; 2782} 2783 2784static int nsp32_release(struct Scsi_Host *host) 2785{ 2786 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 2787 2788 if (data->autoparam) { 2789 pci_free_consistent(data->Pci, sizeof(nsp32_autoparam), 2790 data->autoparam, data->auto_paddr); 2791 } 2792 2793 if (data->sg_list) { 2794 pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE, 2795 data->sg_list, data->sg_paddr); 2796 } 2797 2798 if (host->irq) { 2799 free_irq(host->irq, data); 2800 } 2801 2802 if (host->io_port && host->n_io_port) { 2803 release_region(host->io_port, host->n_io_port); 2804 } 2805 2806 if (data->MmioAddress) { 2807 iounmap(data->MmioAddress); 2808 } 2809 2810 return 0; 2811} 2812 2813static const char *nsp32_info(struct Scsi_Host *shpnt) 2814{ 2815 nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata; 2816 2817 return data->info_str; 2818} 2819 2820 2821/**************************************************************************** 2822 * error handler 2823 */ 2824static int nsp32_eh_abort(struct scsi_cmnd *SCpnt) 2825{ 2826 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2827 unsigned int base = SCpnt->device->host->io_port; 2828 2829 nsp32_msg(KERN_WARNING, "abort"); 2830 2831 if (data->cur_lunt->SCpnt == NULL) { 2832 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed"); 2833 return FAILED; 2834 } 2835 2836 if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) { 2837 /* reset SDTR negotiation */ 2838 data->cur_target->sync_flag = 0; 2839 nsp32_set_async(data, data->cur_target); 2840 } 2841 2842 nsp32_write2(base, TRANSFER_CONTROL, 0); 2843 nsp32_write2(base, BM_CNT, 0); 2844 2845 SCpnt->result = DID_ABORT << 16; 2846 nsp32_scsi_done(SCpnt); 2847 2848 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success"); 2849 return SUCCESS; 2850} 2851 2852static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt) 2853{ 2854 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata; 2855 unsigned int base = SCpnt->device->host->io_port; 2856 2857 spin_lock_irq(SCpnt->device->host->host_lock); 2858 2859 nsp32_msg(KERN_INFO, "Bus Reset"); 2860 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt); 2861 2862 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 2863 nsp32_do_bus_reset(data); 2864 nsp32_write2(base, IRQ_CONTROL, 0); 2865 2866 spin_unlock_irq(SCpnt->device->host->host_lock); 2867 return SUCCESS; /* SCSI bus reset is succeeded at any time. */ 2868} 2869 2870static void nsp32_do_bus_reset(nsp32_hw_data *data) 2871{ 2872 unsigned int base = data->BaseAddress; 2873 unsigned short intrdat; 2874 int i; 2875 2876 nsp32_dbg(NSP32_DEBUG_BUSRESET, "in"); 2877 2878 /* 2879 * stop all transfer 2880 * clear TRANSFERCONTROL_BM_START 2881 * clear counter 2882 */ 2883 nsp32_write2(base, TRANSFER_CONTROL, 0); 2884 nsp32_write4(base, BM_CNT, 0); 2885 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK); 2886 2887 /* 2888 * fall back to asynchronous transfer mode 2889 * initialize SDTR negotiation flag 2890 */ 2891 for (i = 0; i < ARRAY_SIZE(data->target); i++) { 2892 nsp32_target *target = &data->target[i]; 2893 2894 target->sync_flag = 0; 2895 nsp32_set_async(data, target); 2896 } 2897 2898 /* 2899 * reset SCSI bus 2900 */ 2901 nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST); 2902 mdelay(RESET_HOLD_TIME / 1000); 2903 nsp32_write1(base, SCSI_BUS_CONTROL, 0); 2904 for(i = 0; i < 5; i++) { 2905 intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */ 2906 nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat); 2907 } 2908 2909 data->CurrentSC = NULL; 2910} 2911 2912static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt) 2913{ 2914 struct Scsi_Host *host = SCpnt->device->host; 2915 unsigned int base = SCpnt->device->host->io_port; 2916 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 2917 2918 nsp32_msg(KERN_INFO, "Host Reset"); 2919 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt); 2920 2921 spin_lock_irq(SCpnt->device->host->host_lock); 2922 2923 nsp32hw_init(data); 2924 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK); 2925 nsp32_do_bus_reset(data); 2926 nsp32_write2(base, IRQ_CONTROL, 0); 2927 2928 spin_unlock_irq(SCpnt->device->host->host_lock); 2929 return SUCCESS; /* Host reset is succeeded at any time. */ 2930} 2931 2932 2933/************************************************************************** 2934 * EEPROM handler 2935 */ 2936 2937/* 2938 * getting EEPROM parameter 2939 */ 2940static int nsp32_getprom_param(nsp32_hw_data *data) 2941{ 2942 int vendor = data->pci_devid->vendor; 2943 int device = data->pci_devid->device; 2944 int ret, val, i; 2945 2946 /* 2947 * EEPROM checking. 2948 */ 2949 ret = nsp32_prom_read(data, 0x7e); 2950 if (ret != 0x55) { 2951 nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret); 2952 return FALSE; 2953 } 2954 ret = nsp32_prom_read(data, 0x7f); 2955 if (ret != 0xaa) { 2956 nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret); 2957 return FALSE; 2958 } 2959 2960 /* 2961 * check EEPROM type 2962 */ 2963 if (vendor == PCI_VENDOR_ID_WORKBIT && 2964 device == PCI_DEVICE_ID_WORKBIT_STANDARD) { 2965 ret = nsp32_getprom_c16(data); 2966 } else if (vendor == PCI_VENDOR_ID_WORKBIT && 2967 device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) { 2968 ret = nsp32_getprom_at24(data); 2969 } else if (vendor == PCI_VENDOR_ID_WORKBIT && 2970 device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) { 2971 ret = nsp32_getprom_at24(data); 2972 } else { 2973 nsp32_msg(KERN_WARNING, "Unknown EEPROM"); 2974 ret = FALSE; 2975 } 2976 2977 /* for debug : SPROM data full checking */ 2978 for (i = 0; i <= 0x1f; i++) { 2979 val = nsp32_prom_read(data, i); 2980 nsp32_dbg(NSP32_DEBUG_EEPROM, 2981 "rom address 0x%x : 0x%x", i, val); 2982 } 2983 2984 return ret; 2985} 2986 2987 2988/* 2989 * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map: 2990 * 2991 * ROMADDR 2992 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6) 2993 * Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M 2994 * 0x07 : HBA Synchronous Transfer Period 2995 * Value 0: AutoSync, 1: Manual Setting 2996 * 0x08 - 0x0f : Not Used? (0x0) 2997 * 0x10 : Bus Termination 2998 * Value 0: Auto[ON], 1: ON, 2: OFF 2999 * 0x11 : Not Used? (0) 3000 * 0x12 : Bus Reset Delay Time (0x03) 3001 * 0x13 : Bootable CD Support 3002 * Value 0: Disable, 1: Enable 3003 * 0x14 : Device Scan 3004 * Bit 7 6 5 4 3 2 1 0 3005 * | <-----------------> 3006 * | SCSI ID: Value 0: Skip, 1: YES 3007 * |-> Value 0: ALL scan, Value 1: Manual 3008 * 0x15 - 0x1b : Not Used? (0) 3009 * 0x1c : Constant? (0x01) (clock div?) 3010 * 0x1d - 0x7c : Not Used (0xff) 3011 * 0x7d : Not Used? (0xff) 3012 * 0x7e : Constant (0x55), Validity signature 3013 * 0x7f : Constant (0xaa), Validity signature 3014 */ 3015static int nsp32_getprom_at24(nsp32_hw_data *data) 3016{ 3017 int ret, i; 3018 int auto_sync; 3019 nsp32_target *target; 3020 int entry; 3021 3022 /* 3023 * Reset time which is designated by EEPROM. 3024 * 3025 * TODO: Not used yet. 3026 */ 3027 data->resettime = nsp32_prom_read(data, 0x12); 3028 3029 /* 3030 * HBA Synchronous Transfer Period 3031 * 3032 * Note: auto_sync = 0: auto, 1: manual. Ninja SCSI HBA spec says 3033 * that if auto_sync is 0 (auto), and connected SCSI devices are 3034 * same or lower than 3, then transfer speed is set as ULTRA-20M. 3035 * On the contrary if connected SCSI devices are same or higher 3036 * than 4, then transfer speed is set as FAST-10M. 3037 * 3038 * I break this rule. The number of connected SCSI devices are 3039 * only ignored. If auto_sync is 0 (auto), then transfer speed is 3040 * forced as ULTRA-20M. 3041 */ 3042 ret = nsp32_prom_read(data, 0x07); 3043 switch (ret) { 3044 case 0: 3045 auto_sync = TRUE; 3046 break; 3047 case 1: 3048 auto_sync = FALSE; 3049 break; 3050 default: 3051 nsp32_msg(KERN_WARNING, 3052 "Unsupported Auto Sync mode. Fall back to manual mode."); 3053 auto_sync = TRUE; 3054 } 3055 3056 if (trans_mode == ULTRA20M_MODE) { 3057 auto_sync = TRUE; 3058 } 3059 3060 /* 3061 * each device Synchronous Transfer Period 3062 */ 3063 for (i = 0; i < NSP32_HOST_SCSIID; i++) { 3064 target = &data->target[i]; 3065 if (auto_sync == TRUE) { 3066 target->limit_entry = 0; /* set as ULTRA20M */ 3067 } else { 3068 ret = nsp32_prom_read(data, i); 3069 entry = nsp32_search_period_entry(data, target, ret); 3070 if (entry < 0) { 3071 /* search failed... set maximum speed */ 3072 entry = 0; 3073 } 3074 target->limit_entry = entry; 3075 } 3076 } 3077 3078 return TRUE; 3079} 3080 3081 3082/* 3083 * C16 110 (I-O Data: SC-NBD) data map: 3084 * 3085 * ROMADDR 3086 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6) 3087 * Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC 3088 * 0x07 : 0 (HBA Synchronous Transfer Period: Auto Sync) 3089 * 0x08 - 0x0f : Not Used? (0x0) 3090 * 0x10 : Transfer Mode 3091 * Value 0: PIO, 1: Busmater 3092 * 0x11 : Bus Reset Delay Time (0x00-0x20) 3093 * 0x12 : Bus Termination 3094 * Value 0: Disable, 1: Enable 3095 * 0x13 - 0x19 : Disconnection 3096 * Value 0: Disable, 1: Enable 3097 * 0x1a - 0x7c : Not Used? (0) 3098 * 0x7d : Not Used? (0xf8) 3099 * 0x7e : Constant (0x55), Validity signature 3100 * 0x7f : Constant (0xaa), Validity signature 3101 */ 3102static int nsp32_getprom_c16(nsp32_hw_data *data) 3103{ 3104 int ret, i; 3105 nsp32_target *target; 3106 int entry, val; 3107 3108 /* 3109 * Reset time which is designated by EEPROM. 3110 * 3111 * TODO: Not used yet. 3112 */ 3113 data->resettime = nsp32_prom_read(data, 0x11); 3114 3115 /* 3116 * each device Synchronous Transfer Period 3117 */ 3118 for (i = 0; i < NSP32_HOST_SCSIID; i++) { 3119 target = &data->target[i]; 3120 ret = nsp32_prom_read(data, i); 3121 switch (ret) { 3122 case 0: /* 20MB/s */ 3123 val = 0x0c; 3124 break; 3125 case 1: /* 10MB/s */ 3126 val = 0x19; 3127 break; 3128 case 2: /* 5MB/s */ 3129 val = 0x32; 3130 break; 3131 case 3: /* ASYNC */ 3132 val = 0x00; 3133 break; 3134 default: /* default 20MB/s */ 3135 val = 0x0c; 3136 break; 3137 } 3138 entry = nsp32_search_period_entry(data, target, val); 3139 if (entry < 0 || trans_mode == ULTRA20M_MODE) { 3140 /* search failed... set maximum speed */ 3141 entry = 0; 3142 } 3143 target->limit_entry = entry; 3144 } 3145 3146 return TRUE; 3147} 3148 3149 3150/* 3151 * Atmel AT24C01A (drived in 5V) serial EEPROM routines 3152 */ 3153static int nsp32_prom_read(nsp32_hw_data *data, int romaddr) 3154{ 3155 int i, val; 3156 3157 /* start condition */ 3158 nsp32_prom_start(data); 3159 3160 /* device address */ 3161 nsp32_prom_write_bit(data, 1); /* 1 */ 3162 nsp32_prom_write_bit(data, 0); /* 0 */ 3163 nsp32_prom_write_bit(data, 1); /* 1 */ 3164 nsp32_prom_write_bit(data, 0); /* 0 */ 3165 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */ 3166 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */ 3167 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */ 3168 3169 /* R/W: W for dummy write */ 3170 nsp32_prom_write_bit(data, 0); 3171 3172 /* ack */ 3173 nsp32_prom_write_bit(data, 0); 3174 3175 /* word address */ 3176 for (i = 7; i >= 0; i--) { 3177 nsp32_prom_write_bit(data, ((romaddr >> i) & 1)); 3178 } 3179 3180 /* ack */ 3181 nsp32_prom_write_bit(data, 0); 3182 3183 /* start condition */ 3184 nsp32_prom_start(data); 3185 3186 /* device address */ 3187 nsp32_prom_write_bit(data, 1); /* 1 */ 3188 nsp32_prom_write_bit(data, 0); /* 0 */ 3189 nsp32_prom_write_bit(data, 1); /* 1 */ 3190 nsp32_prom_write_bit(data, 0); /* 0 */ 3191 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */ 3192 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */ 3193 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */ 3194 3195 /* R/W: R */ 3196 nsp32_prom_write_bit(data, 1); 3197 3198 /* ack */ 3199 nsp32_prom_write_bit(data, 0); 3200 3201 /* data... */ 3202 val = 0; 3203 for (i = 7; i >= 0; i--) { 3204 val += (nsp32_prom_read_bit(data) << i); 3205 } 3206 3207 /* no ack */ 3208 nsp32_prom_write_bit(data, 1); 3209 3210 /* stop condition */ 3211 nsp32_prom_stop(data); 3212 3213 return val; 3214} 3215 3216static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val) 3217{ 3218 int base = data->BaseAddress; 3219 int tmp; 3220 3221 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL); 3222 3223 if (val == 0) { 3224 tmp &= ~bit; 3225 } else { 3226 tmp |= bit; 3227 } 3228 3229 nsp32_index_write1(base, SERIAL_ROM_CTL, tmp); 3230 3231 udelay(10); 3232} 3233 3234static int nsp32_prom_get(nsp32_hw_data *data, int bit) 3235{ 3236 int base = data->BaseAddress; 3237 int tmp, ret; 3238 3239 if (bit != SDA) { 3240 nsp32_msg(KERN_ERR, "return value is not appropriate"); 3241 return 0; 3242 } 3243 3244 3245 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit; 3246 3247 if (tmp == 0) { 3248 ret = 0; 3249 } else { 3250 ret = 1; 3251 } 3252 3253 udelay(10); 3254 3255 return ret; 3256} 3257 3258static void nsp32_prom_start (nsp32_hw_data *data) 3259{ 3260 /* start condition */ 3261 nsp32_prom_set(data, SCL, 1); 3262 nsp32_prom_set(data, SDA, 1); 3263 nsp32_prom_set(data, ENA, 1); /* output mode */ 3264 nsp32_prom_set(data, SDA, 0); /* keeping SCL=1 and transiting 3265 * SDA 1->0 is start condition */ 3266 nsp32_prom_set(data, SCL, 0); 3267} 3268 3269static void nsp32_prom_stop (nsp32_hw_data *data) 3270{ 3271 /* stop condition */ 3272 nsp32_prom_set(data, SCL, 1); 3273 nsp32_prom_set(data, SDA, 0); 3274 nsp32_prom_set(data, ENA, 1); /* output mode */ 3275 nsp32_prom_set(data, SDA, 1); 3276 nsp32_prom_set(data, SCL, 0); 3277} 3278 3279static void nsp32_prom_write_bit(nsp32_hw_data *data, int val) 3280{ 3281 /* write */ 3282 nsp32_prom_set(data, SDA, val); 3283 nsp32_prom_set(data, SCL, 1 ); 3284 nsp32_prom_set(data, SCL, 0 ); 3285} 3286 3287static int nsp32_prom_read_bit(nsp32_hw_data *data) 3288{ 3289 int val; 3290 3291 /* read */ 3292 nsp32_prom_set(data, ENA, 0); /* input mode */ 3293 nsp32_prom_set(data, SCL, 1); 3294 3295 val = nsp32_prom_get(data, SDA); 3296 3297 nsp32_prom_set(data, SCL, 0); 3298 nsp32_prom_set(data, ENA, 1); /* output mode */ 3299 3300 return val; 3301} 3302 3303 3304/************************************************************************** 3305 * Power Management 3306 */ 3307#ifdef CONFIG_PM 3308 3309/* Device suspended */ 3310static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state) 3311{ 3312 struct Scsi_Host *host = pci_get_drvdata(pdev); 3313 3314 nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host); 3315 3316 pci_save_state (pdev); 3317 pci_disable_device (pdev); 3318 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 3319 3320 return 0; 3321} 3322 3323/* Device woken up */ 3324static int nsp32_resume(struct pci_dev *pdev) 3325{ 3326 struct Scsi_Host *host = pci_get_drvdata(pdev); 3327 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata; 3328 unsigned short reg; 3329 3330 nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host); 3331 3332 pci_set_power_state(pdev, PCI_D0); 3333 pci_enable_wake (pdev, PCI_D0, 0); 3334 pci_restore_state (pdev); 3335 3336 reg = nsp32_read2(data->BaseAddress, INDEX_REG); 3337 3338 nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg); 3339 3340 if (reg == 0xffff) { 3341 nsp32_msg(KERN_INFO, "missing device. abort resume."); 3342 return 0; 3343 } 3344 3345 nsp32hw_init (data); 3346 nsp32_do_bus_reset(data); 3347 3348 nsp32_msg(KERN_INFO, "resume success"); 3349 3350 return 0; 3351} 3352 3353#endif 3354 3355/************************************************************************ 3356 * PCI/Cardbus probe/remove routine 3357 */ 3358static int nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id) 3359{ 3360 int ret; 3361 nsp32_hw_data *data = &nsp32_data_base; 3362 3363 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 3364 3365 ret = pci_enable_device(pdev); 3366 if (ret) { 3367 nsp32_msg(KERN_ERR, "failed to enable pci device"); 3368 return ret; 3369 } 3370 3371 data->Pci = pdev; 3372 data->pci_devid = id; 3373 data->IrqNumber = pdev->irq; 3374 data->BaseAddress = pci_resource_start(pdev, 0); 3375 data->NumAddress = pci_resource_len (pdev, 0); 3376 data->MmioAddress = pci_ioremap_bar(pdev, 1); 3377 data->MmioLength = pci_resource_len (pdev, 1); 3378 3379 pci_set_master(pdev); 3380 3381 ret = nsp32_detect(pdev); 3382 3383 nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s", 3384 pdev->irq, 3385 data->MmioAddress, data->MmioLength, 3386 pci_name(pdev), 3387 nsp32_model[id->driver_data]); 3388 3389 nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret); 3390 3391 return ret; 3392} 3393 3394static void nsp32_remove(struct pci_dev *pdev) 3395{ 3396 struct Scsi_Host *host = pci_get_drvdata(pdev); 3397 3398 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter"); 3399 3400 scsi_remove_host(host); 3401 3402 nsp32_release(host); 3403 3404 scsi_host_put(host); 3405} 3406 3407static struct pci_driver nsp32_driver = { 3408 .name = "nsp32", 3409 .id_table = nsp32_pci_table, 3410 .probe = nsp32_probe, 3411 .remove = nsp32_remove, 3412#ifdef CONFIG_PM 3413 .suspend = nsp32_suspend, 3414 .resume = nsp32_resume, 3415#endif 3416}; 3417 3418/********************************************************************* 3419 * Moule entry point 3420 */ 3421static int __init init_nsp32(void) { 3422 nsp32_msg(KERN_INFO, "loading..."); 3423 return pci_register_driver(&nsp32_driver); 3424} 3425 3426static void __exit exit_nsp32(void) { 3427 nsp32_msg(KERN_INFO, "unloading..."); 3428 pci_unregister_driver(&nsp32_driver); 3429} 3430 3431module_init(init_nsp32); 3432module_exit(exit_nsp32); 3433 3434/* end */ 3435