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

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