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[SCSI] sd: fix issue_flush
[deliverable/linux.git] / drivers / scsi / nsp32.c
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1da177e4
LT		 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/version.h>
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/sched.h>
31#include <linux/slab.h>
32#include <linux/string.h>
33#include <linux/timer.h>
34#include <linux/ioport.h>
35#include <linux/major.h>
36#include <linux/blkdev.h>
37#include <linux/interrupt.h>
38#include <linux/pci.h>
39#include <linux/delay.h>
40#include <linux/ctype.h>
41
42#include <asm/dma.h>
43#include <asm/system.h>
44#include <asm/io.h>
45
46#include <scsi/scsi.h>
47#include <scsi/scsi_cmnd.h>
48#include <scsi/scsi_device.h>
49#include <scsi/scsi_host.h>
50#include <scsi/scsi_ioctl.h>
51
52#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0))
53# include <linux/blk.h>
54#endif
55
56#include "nsp32.h"
57
58
59/***********************************************************************
60 * Module parameters
61 */
62static int trans_mode = 0; /* default: BIOS */
63module_param (trans_mode, int, 0);
64MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M");
65#define ASYNC_MODE 1
66#define ULTRA20M_MODE 2
67
68static int auto_param = 0; /* default: ON */
69module_param (auto_param, bool, 0);
70MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
71
72static int disc_priv = 1; /* default: OFF */
73module_param (disc_priv, bool, 0);
74MODULE_PARM_DESC(disc_priv, "disconnection privilege mode (0: ON 1: OFF(default))");
75
76MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>");
77MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module");
78MODULE_LICENSE("GPL");
79
80static const char *nsp32_release_version = "1.2";
81
82
83/****************************************************************************
84 * Supported hardware
85 */
86static struct pci_device_id nsp32_pci_table[] __devinitdata = {
87 {
88 .vendor = PCI_VENDOR_ID_IODATA,
89 .device = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II,
90 .subvendor = PCI_ANY_ID,
91 .subdevice = PCI_ANY_ID,
92 .driver_data = MODEL_IODATA,
93 },
94 {
95 .vendor = PCI_VENDOR_ID_WORKBIT,
96 .device = PCI_DEVICE_ID_NINJASCSI_32BI_KME,
97 .subvendor = PCI_ANY_ID,
98 .subdevice = PCI_ANY_ID,
99 .driver_data = MODEL_KME,
100 },
101 {
102 .vendor = PCI_VENDOR_ID_WORKBIT,
103 .device = PCI_DEVICE_ID_NINJASCSI_32BI_WBT,
104 .subvendor = PCI_ANY_ID,
105 .subdevice = PCI_ANY_ID,
106 .driver_data = MODEL_WORKBIT,
107 },
108 {
109 .vendor = PCI_VENDOR_ID_WORKBIT,
110 .device = PCI_DEVICE_ID_WORKBIT_STANDARD,
111 .subvendor = PCI_ANY_ID,
112 .subdevice = PCI_ANY_ID,
113 .driver_data = MODEL_PCI_WORKBIT,
114 },
115 {
116 .vendor = PCI_VENDOR_ID_WORKBIT,
117 .device = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC,
118 .subvendor = PCI_ANY_ID,
119 .subdevice = PCI_ANY_ID,
120 .driver_data = MODEL_LOGITEC,
121 },
122 {
123 .vendor = PCI_VENDOR_ID_WORKBIT,
124 .device = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC,
125 .subvendor = PCI_ANY_ID,
126 .subdevice = PCI_ANY_ID,
127 .driver_data = MODEL_PCI_LOGITEC,
128 },
129 {
130 .vendor = PCI_VENDOR_ID_WORKBIT,
131 .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO,
132 .subvendor = PCI_ANY_ID,
133 .subdevice = PCI_ANY_ID,
134 .driver_data = MODEL_PCI_MELCO,
135 },
136 {
137 .vendor = PCI_VENDOR_ID_WORKBIT,
138 .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II,
139 .subvendor = PCI_ANY_ID,
140 .subdevice = PCI_ANY_ID,
141 .driver_data = MODEL_PCI_MELCO,
142 },
143 {0,0,},
144};
145MODULE_DEVICE_TABLE(pci, nsp32_pci_table);
146
147static nsp32_hw_data nsp32_data_base; /* probe <-> detect glue */
148
149
150/*
151 * Period/AckWidth speed conversion table
152 *
153 * Note: This period/ackwidth speed table must be in descending order.
154 */
155static nsp32_sync_table nsp32_sync_table_40M[] = {
156 /* {PNo, AW, SP, EP, SREQ smpl} Speed(MB/s) Period AckWidth */
157 {0x1, 0, 0x0c, 0x0c, SMPL_40M}, /* 20.0 : 50ns, 25ns */
158 {0x2, 0, 0x0d, 0x18, SMPL_40M}, /* 13.3 : 75ns, 25ns */
159 {0x3, 1, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */
160 {0x4, 1, 0x1a, 0x1f, SMPL_20M}, /* 8.0 : 125ns, 50ns */
161 {0x5, 2, 0x20, 0x25, SMPL_20M}, /* 6.7 : 150ns, 75ns */
162 {0x6, 2, 0x26, 0x31, SMPL_20M}, /* 5.7 : 175ns, 75ns */
163 {0x7, 3, 0x32, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */
164 {0x8, 3, 0x33, 0x38, SMPL_10M}, /* 4.4 : 225ns, 100ns */
165 {0x9, 3, 0x39, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */
166};
167
168static nsp32_sync_table nsp32_sync_table_20M[] = {
169 {0x1, 0, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */
170 {0x2, 0, 0x1a, 0x25, SMPL_20M}, /* 6.7 : 150ns, 50ns */
171 {0x3, 1, 0x26, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */
172 {0x4, 1, 0x33, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */
173 {0x5, 2, 0x3f, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 150ns */
174 {0x6, 2, 0x4c, 0x57, SMPL_10M}, /* 2.8 : 350ns, 150ns */
175 {0x7, 3, 0x58, 0x64, SMPL_10M}, /* 2.5 : 400ns, 200ns */
176 {0x8, 3, 0x65, 0x70, SMPL_10M}, /* 2.2 : 450ns, 200ns */
177 {0x9, 3, 0x71, 0x7d, SMPL_10M}, /* 2.0 : 500ns, 200ns */
178};
179
180static nsp32_sync_table nsp32_sync_table_pci[] = {
181 {0x1, 0, 0x0c, 0x0f, SMPL_40M}, /* 16.6 : 60ns, 30ns */
182 {0x2, 0, 0x10, 0x16, SMPL_40M}, /* 11.1 : 90ns, 30ns */
183 {0x3, 1, 0x17, 0x1e, SMPL_20M}, /* 8.3 : 120ns, 60ns */
184 {0x4, 1, 0x1f, 0x25, SMPL_20M}, /* 6.7 : 150ns, 60ns */
185 {0x5, 2, 0x26, 0x2d, SMPL_20M}, /* 5.6 : 180ns, 90ns */
186 {0x6, 2, 0x2e, 0x34, SMPL_10M}, /* 4.8 : 210ns, 90ns */
187 {0x7, 3, 0x35, 0x3c, SMPL_10M}, /* 4.2 : 240ns, 120ns */
188 {0x8, 3, 0x3d, 0x43, SMPL_10M}, /* 3.7 : 270ns, 120ns */
189 {0x9, 3, 0x44, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 120ns */
190};
191
192/*
193 * function declaration
194 */
195/* module entry point */
196static int __devinit nsp32_probe (struct pci_dev *, const struct pci_device_id *);
197static void __devexit nsp32_remove(struct pci_dev *);
198static int __init init_nsp32 (void);
199static void __exit exit_nsp32 (void);
200
201/* struct Scsi_Host_Template */
202#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
203static int nsp32_proc_info (struct Scsi_Host *, char *, char **, off_t, int, int);
204#else
205static int nsp32_proc_info (char *, char **, off_t, int, int, int);
206#endif
207
208#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
209static int nsp32_detect (struct pci_dev *pdev);
210#else
211static int nsp32_detect (Scsi_Host_Template *);
212#endif
213static int nsp32_queuecommand(struct scsi_cmnd *,
214 void (*done)(struct scsi_cmnd *));
215static const char *nsp32_info (struct Scsi_Host *);
216static int nsp32_release (struct Scsi_Host *);
217
218/* SCSI error handler */
219static int nsp32_eh_abort (struct scsi_cmnd *);
220static int nsp32_eh_bus_reset (struct scsi_cmnd *);
221static int nsp32_eh_host_reset(struct scsi_cmnd *);
222
223/* generate SCSI message */
224static void nsp32_build_identify(struct scsi_cmnd *);
225static void nsp32_build_nop (struct scsi_cmnd *);
226static void nsp32_build_reject (struct scsi_cmnd *);
227static void nsp32_build_sdtr (struct scsi_cmnd *, unsigned char, unsigned char);
228
229/* SCSI message handler */
230static int nsp32_busfree_occur(struct scsi_cmnd *, unsigned short);
231static void nsp32_msgout_occur (struct scsi_cmnd *);
232static void nsp32_msgin_occur (struct scsi_cmnd *, unsigned long, unsigned short);
233
234static int nsp32_setup_sg_table (struct scsi_cmnd *);
235static int nsp32_selection_autopara(struct scsi_cmnd *);
236static int nsp32_selection_autoscsi(struct scsi_cmnd *);
237static void nsp32_scsi_done (struct scsi_cmnd *);
238static int nsp32_arbitration (struct scsi_cmnd *, unsigned int);
239static int nsp32_reselection (struct scsi_cmnd *, unsigned char);
240static void nsp32_adjust_busfree (struct scsi_cmnd *, unsigned int);
241static void nsp32_restart_autoscsi (struct scsi_cmnd *, unsigned short);
242
243/* SCSI SDTR */
244static void nsp32_analyze_sdtr (struct scsi_cmnd *);
245static int nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char);
246static void nsp32_set_async (nsp32_hw_data *, nsp32_target *);
247static void nsp32_set_max_sync (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *);
248static void nsp32_set_sync_entry (nsp32_hw_data *, nsp32_target *, int, unsigned char);
249
250/* SCSI bus status handler */
251static void nsp32_wait_req (nsp32_hw_data *, int);
252static void nsp32_wait_sack (nsp32_hw_data *, int);
253static void nsp32_sack_assert (nsp32_hw_data *);
254static void nsp32_sack_negate (nsp32_hw_data *);
255static void nsp32_do_bus_reset(nsp32_hw_data *);
256
257/* hardware interrupt handler */
258static irqreturn_t do_nsp32_isr(int, void *, struct pt_regs *);
259
260/* initialize hardware */
261static int nsp32hw_init(nsp32_hw_data *);
262
263/* EEPROM handler */
264static int nsp32_getprom_param (nsp32_hw_data *);
265static int nsp32_getprom_at24 (nsp32_hw_data *);
266static int nsp32_getprom_c16 (nsp32_hw_data *);
267static void nsp32_prom_start (nsp32_hw_data *);
268static void nsp32_prom_stop (nsp32_hw_data *);
269static int nsp32_prom_read (nsp32_hw_data *, int);
270static int nsp32_prom_read_bit (nsp32_hw_data *);
271static void nsp32_prom_write_bit(nsp32_hw_data *, int);
272static void nsp32_prom_set (nsp32_hw_data *, int, int);
273static int nsp32_prom_get (nsp32_hw_data *, int);
274
275/* debug/warning/info message */
276static void nsp32_message (const char *, int, char *, char *, ...);
277#ifdef NSP32_DEBUG
278static void nsp32_dmessage(const char *, int, int, char *, ...);
279#endif
280
281/*
282 * max_sectors is currently limited up to 128.
283 */
284static struct scsi_host_template nsp32_template = {
285 .proc_name = "nsp32",
286 .name = "Workbit NinjaSCSI-32Bi/UDE",
287 .proc_info = nsp32_proc_info,
288 .info = nsp32_info,
289 .queuecommand = nsp32_queuecommand,
290 .can_queue = 1,
291 .sg_tablesize = NSP32_SG_SIZE,
292 .max_sectors = 128,
293 .cmd_per_lun = 1,
294 .this_id = NSP32_HOST_SCSIID,
295 .use_clustering = DISABLE_CLUSTERING,
296 .eh_abort_handler = nsp32_eh_abort,
1da177e4
LT		 297 .eh_bus_reset_handler = nsp32_eh_bus_reset,
298 .eh_host_reset_handler = nsp32_eh_host_reset,
299#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,74))
300 .detect = nsp32_detect,
301 .release = nsp32_release,
302#endif
303#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,2))
304 .use_new_eh_code = 1,
305#else
306/* .highmem_io = 1, */
307#endif
308};
309
310#include "nsp32_io.h"
311
312/***********************************************************************
313 * debug, error print
314 */
315#ifndef NSP32_DEBUG
316# define NSP32_DEBUG_MASK 0x000000
317# define nsp32_msg(type, args...) nsp32_message ("", 0, (type), args)
318# define nsp32_dbg(mask, args...) /* */
319#else
320# define NSP32_DEBUG_MASK 0xffffff
321# define nsp32_msg(type, args...) \
322 nsp32_message (__FUNCTION__, __LINE__, (type), args)
323# define nsp32_dbg(mask, args...) \
324 nsp32_dmessage(__FUNCTION__, __LINE__, (mask), args)
325#endif
326
327#define NSP32_DEBUG_QUEUECOMMAND BIT(0)
328#define NSP32_DEBUG_REGISTER BIT(1)
329#define NSP32_DEBUG_AUTOSCSI BIT(2)
330#define NSP32_DEBUG_INTR BIT(3)
331#define NSP32_DEBUG_SGLIST BIT(4)
332#define NSP32_DEBUG_BUSFREE BIT(5)
333#define NSP32_DEBUG_CDB_CONTENTS BIT(6)
334#define NSP32_DEBUG_RESELECTION BIT(7)
335#define NSP32_DEBUG_MSGINOCCUR BIT(8)
336#define NSP32_DEBUG_EEPROM BIT(9)
337#define NSP32_DEBUG_MSGOUTOCCUR BIT(10)
338#define NSP32_DEBUG_BUSRESET BIT(11)
339#define NSP32_DEBUG_RESTART BIT(12)
340#define NSP32_DEBUG_SYNC BIT(13)
341#define NSP32_DEBUG_WAIT BIT(14)
342#define NSP32_DEBUG_TARGETFLAG BIT(15)
343#define NSP32_DEBUG_PROC BIT(16)
344#define NSP32_DEBUG_INIT BIT(17)
345#define NSP32_SPECIAL_PRINT_REGISTER BIT(20)
346
347#define NSP32_DEBUG_BUF_LEN 100
348
349static void nsp32_message(const char *func, int line, char *type, char *fmt, ...)
350{
351 va_list args;
352 char buf[NSP32_DEBUG_BUF_LEN];
353
354 va_start(args, fmt);
355 vsnprintf(buf, sizeof(buf), fmt, args);
356 va_end(args);
357
358#ifndef NSP32_DEBUG
359 printk("%snsp32: %s\n", type, buf);
360#else
361 printk("%snsp32: %s (%d): %s\n", type, func, line, buf);
362#endif
363}
364
365#ifdef NSP32_DEBUG
366static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...)
367{
368 va_list args;
369 char buf[NSP32_DEBUG_BUF_LEN];
370
371 va_start(args, fmt);
372 vsnprintf(buf, sizeof(buf), fmt, args);
373 va_end(args);
374
375 if (mask & NSP32_DEBUG_MASK) {
376 printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
377 }
378}
379#endif
380
381#ifdef NSP32_DEBUG
382# include "nsp32_debug.c"
383#else
384# define show_command(arg) /* */
385# define show_busphase(arg) /* */
386# define show_autophase(arg) /* */
387#endif
388
389/*
390 * IDENTIFY Message
391 */
392static void nsp32_build_identify(struct scsi_cmnd *SCpnt)
393{
394 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
395 int pos = data->msgout_len;
396 int mode = FALSE;
397
398 /* XXX: Auto DiscPriv detection is progressing... */
399 if (disc_priv == 0) {
400 /* mode = TRUE; */
401 }
402
403 data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++;
404
405 data->msgout_len = pos;
406}
407
408/*
409 * SDTR Message Routine
410 */
411static void nsp32_build_sdtr(struct scsi_cmnd *SCpnt,
412 unsigned char period,
413 unsigned char offset)
414{
415 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
416 int pos = data->msgout_len;
417
418 data->msgoutbuf[pos] = EXTENDED_MESSAGE; pos++;
419 data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++;
420 data->msgoutbuf[pos] = EXTENDED_SDTR; pos++;
421 data->msgoutbuf[pos] = period; pos++;
422 data->msgoutbuf[pos] = offset; pos++;
423
424 data->msgout_len = pos;
425}
426
427/*
428 * No Operation Message
429 */
430static void nsp32_build_nop(struct scsi_cmnd *SCpnt)
431{
432 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
433 int pos = data->msgout_len;
434
435 if (pos != 0) {
436 nsp32_msg(KERN_WARNING,
437 "Some messages are already contained!");
438 return;
439 }
440
441 data->msgoutbuf[pos] = NOP; pos++;
442 data->msgout_len = pos;
443}
444
445/*
446 * Reject Message
447 */
448static void nsp32_build_reject(struct scsi_cmnd *SCpnt)
449{
450 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
451 int pos = data->msgout_len;
452
453 data->msgoutbuf[pos] = MESSAGE_REJECT; pos++;
454 data->msgout_len = pos;
455}
456
457/*
458 * timer
459 */
460#if 0
461static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time)
462{
463 unsigned int base = SCpnt->host->io_port;
464
465 nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time);
466
467 if (time & (~TIMER_CNT_MASK)) {
468 nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow");
469 }
470
471 nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK);
472}
473#endif
474
475
476/*
477 * set SCSI command and other parameter to asic, and start selection phase
478 */
479static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt)
480{
481 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
482 unsigned int base = SCpnt->device->host->io_port;
483 unsigned int host_id = SCpnt->device->host->this_id;
422c0d61 484 unsigned char target = scmd_id(SCpnt);
1da177e4
LT		 485 nsp32_autoparam *param = data->autoparam;
486 unsigned char phase;
487 int i, ret;
488 unsigned int msgout;
489 u16_le s;
490
491 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
492
493 /*
494 * check bus free
495 */
496 phase = nsp32_read1(base, SCSI_BUS_MONITOR);
497 if (phase != BUSMON_BUS_FREE) {
498 nsp32_msg(KERN_WARNING, "bus busy");
499 show_busphase(phase & BUSMON_PHASE_MASK);
500 SCpnt->result = DID_BUS_BUSY << 16;
501 return FALSE;
502 }
503
504 /*
505 * message out
506 *
507 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
508 * over 3 messages needs another routine.
509 */
510 if (data->msgout_len == 0) {
511 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
512 SCpnt->result = DID_ERROR << 16;
513 return FALSE;
514 } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
515 msgout = 0;
516 for (i = 0; i < data->msgout_len; i++) {
517 /*
518 * the sending order of the message is:
519 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2
520 * MCNT 2: MSG#1 -> MSG#2
521 * MCNT 1: MSG#2
522 */
523 msgout >>= 8;
524 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
525 }
526 msgout |= MV_VALID; /* MV valid */
527 msgout |= (unsigned int)data->msgout_len; /* len */
528 } else {
529 /* data->msgout_len > 3 */
530 msgout = 0;
531 }
532
533 // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT));
534 // nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
535
536 /*
537 * setup asic parameter
538 */
539 memset(param, 0, sizeof(nsp32_autoparam));
540
541 /* cdb */
542 for (i = 0; i < SCpnt->cmd_len; i++) {
543 param->cdb[4 * i] = SCpnt->cmnd[i];
544 }
545
546 /* outgoing messages */
547 param->msgout = cpu_to_le32(msgout);
548
549 /* syncreg, ackwidth, target id, SREQ sampling rate */
550 param->syncreg = data->cur_target->syncreg;
551 param->ackwidth = data->cur_target->ackwidth;
552 param->target_id = BIT(host_id) | BIT(target);
553 param->sample_reg = data->cur_target->sample_reg;
554
555 // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg);
556
557 /* command control */
558 param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER |
559 AUTOSCSI_START |
560 AUTO_MSGIN_00_OR_04 |
561 AUTO_MSGIN_02 |
562 AUTO_ATN );
563
564
565 /* transfer control */
566 s = 0;
567 switch (data->trans_method) {
568 case NSP32_TRANSFER_BUSMASTER:
569 s |= BM_START;
570 break;
571 case NSP32_TRANSFER_MMIO:
572 s |= CB_MMIO_MODE;
573 break;
574 case NSP32_TRANSFER_PIO:
575 s |= CB_IO_MODE;
576 break;
577 default:
578 nsp32_msg(KERN_ERR, "unknown trans_method");
579 break;
580 }
581 /*
582 * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits.
583 * For bus master transfer, it's taken off.
584 */
585 s |= (TRANSFER_GO | ALL_COUNTER_CLR);
586 param->transfer_control = cpu_to_le16(s);
587
588 /* sg table addr */
589 param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr);
590
591 /*
592 * transfer parameter to ASIC
593 */
594 nsp32_write4(base, SGT_ADR, data->auto_paddr);
595 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER |
596 AUTO_PARAMETER );
597
598 /*
599 * Check arbitration
600 */
601 ret = nsp32_arbitration(SCpnt, base);
602
603 return ret;
604}
605
606
607/*
608 * Selection with AUTO SCSI (without AUTO PARAMETER)
609 */
610static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
611{
612 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
613 unsigned int base = SCpnt->device->host->io_port;
614 unsigned int host_id = SCpnt->device->host->this_id;
422c0d61 615 unsigned char target = scmd_id(SCpnt);
1da177e4
LT		 616 unsigned char phase;
617 int status;
618 unsigned short command = 0;
619 unsigned int msgout = 0;
620 unsigned short execph;
621 int i;
622
623 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
624
625 /*
626 * IRQ disable
627 */
628 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
629
630 /*
631 * check bus line
632 */
633 phase = nsp32_read1(base, SCSI_BUS_MONITOR);
634 if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
635 nsp32_msg(KERN_WARNING, "bus busy");
636 SCpnt->result = DID_BUS_BUSY << 16;
637 status = 1;
638 goto out;
639 }
640
641 /*
642 * clear execph
643 */
644 execph = nsp32_read2(base, SCSI_EXECUTE_PHASE);
645
646 /*
647 * clear FIFO counter to set CDBs
648 */
649 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER);
650
651 /*
652 * set CDB0 - CDB15
653 */
654 for (i = 0; i < SCpnt->cmd_len; i++) {
655 nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]);
656 }
657 nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]);
658
659 /*
660 * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID
661 */
662 nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target));
663
664 /*
665 * set SCSI MSGOUT REG
666 *
667 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
668 * over 3 messages needs another routine.
669 */
670 if (data->msgout_len == 0) {
671 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
672 SCpnt->result = DID_ERROR << 16;
673 status = 1;
674 goto out;
675 } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
676 msgout = 0;
677 for (i = 0; i < data->msgout_len; i++) {
678 /*
679 * the sending order of the message is:
680 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2
681 * MCNT 2: MSG#1 -> MSG#2
682 * MCNT 1: MSG#2
683 */
684 msgout >>= 8;
685 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
686 }
687 msgout |= MV_VALID; /* MV valid */
688 msgout |= (unsigned int)data->msgout_len; /* len */
689 nsp32_write4(base, SCSI_MSG_OUT, msgout);
690 } else {
691 /* data->msgout_len > 3 */
692 nsp32_write4(base, SCSI_MSG_OUT, 0);
693 }
694
695 /*
696 * set selection timeout(= 250ms)
697 */
698 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
699
700 /*
701 * set SREQ hazard killer sampling rate
702 *
703 * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz.
704 * check other internal clock!
705 */
706 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
707
708 /*
709 * clear Arbit
710 */
711 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
712
713 /*
714 * set SYNCREG
715 * Don't set BM_START_ADR before setting this register.
716 */
717 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
718
719 /*
720 * set ACKWIDTH
721 */
722 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
723
724 nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
725 "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x",
726 nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH),
727 nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
728 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x",
729 data->msgout_len, msgout);
730
731 /*
732 * set SGT ADDR (physical address)
733 */
734 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
735
736 /*
737 * set TRANSFER CONTROL REG
738 */
739 command = 0;
740 command |= (TRANSFER_GO | ALL_COUNTER_CLR);
741 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
742 if (SCpnt->request_bufflen > 0) {
743 command |= BM_START;
744 }
745 } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
746 command |= CB_MMIO_MODE;
747 } else if (data->trans_method & NSP32_TRANSFER_PIO) {
748 command |= CB_IO_MODE;
749 }
750 nsp32_write2(base, TRANSFER_CONTROL, command);
751
752 /*
753 * start AUTO SCSI, kick off arbitration
754 */
755 command = (CLEAR_CDB_FIFO_POINTER |
756 AUTOSCSI_START |
757 AUTO_MSGIN_00_OR_04 |
758 AUTO_MSGIN_02 |
759 AUTO_ATN );
760 nsp32_write2(base, COMMAND_CONTROL, command);
761
762 /*
763 * Check arbitration
764 */
765 status = nsp32_arbitration(SCpnt, base);
766
767 out:
768 /*
769 * IRQ enable
770 */
771 nsp32_write2(base, IRQ_CONTROL, 0);
772
773 return status;
774}
775
776
777/*
778 * Arbitration Status Check
779 *
780 * Note: Arbitration counter is waited during ARBIT_GO is not lifting.
781 * Using udelay(1) consumes CPU time and system time, but
782 * arbitration delay time is defined minimal 2.4us in SCSI
783 * specification, thus udelay works as coarse grained wait timer.
784 */
785static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base)
786{
787 unsigned char arbit;
788 int status = TRUE;
789 int time = 0;
790
791 do {
792 arbit = nsp32_read1(base, ARBIT_STATUS);
793 time++;
794 } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
795 (time <= ARBIT_TIMEOUT_TIME));
796
797 nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
798 "arbit: 0x%x, delay time: %d", arbit, time);
799
800 if (arbit & ARBIT_WIN) {
801 /* Arbitration succeeded */
802 SCpnt->result = DID_OK << 16;
803 nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */
804 } else if (arbit & ARBIT_FAIL) {
805 /* Arbitration failed */
806 SCpnt->result = DID_BUS_BUSY << 16;
807 status = FALSE;
808 } else {
809 /*
810 * unknown error or ARBIT_GO timeout,
811 * something lock up! guess no connection.
812 */
813 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout");
814 SCpnt->result = DID_NO_CONNECT << 16;
815 status = FALSE;
816 }
817
818 /*
819 * clear Arbit
820 */
821 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
822
823 return status;
824}
825
826
827/*
828 * reselection
829 *
830 * Note: This reselection routine is called from msgin_occur,
831 * reselection target id&lun must be already set.
832 * SCSI-2 says IDENTIFY implies RESTORE_POINTER operation.
833 */
834static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun)
835{
836 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
837 unsigned int host_id = SCpnt->device->host->this_id;
838 unsigned int base = SCpnt->device->host->io_port;
839 unsigned char tmpid, newid;
840
841 nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter");
842
843 /*
844 * calculate reselected SCSI ID
845 */
846 tmpid = nsp32_read1(base, RESELECT_ID);
847 tmpid &= (~BIT(host_id));
848 newid = 0;
849 while (tmpid) {
850 if (tmpid & 1) {
851 break;
852 }
853 tmpid >>= 1;
854 newid++;
855 }
856
857 /*
858 * If reselected New ID:LUN is not existed
859 * or current nexus is not existed, unexpected
860 * reselection is occurred. Send reject message.
861 */
862 if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) {
863 nsp32_msg(KERN_WARNING, "unknown id/lun");
864 return FALSE;
865 } else if(data->lunt[newid][newlun].SCpnt == NULL) {
866 nsp32_msg(KERN_WARNING, "no SCSI command is processing");
867 return FALSE;
868 }
869
870 data->cur_id = newid;
871 data->cur_lun = newlun;
872 data->cur_target = &(data->target[newid]);
873 data->cur_lunt = &(data->lunt[newid][newlun]);
874
875 /* reset SACK/SavedACK counter (or ALL clear?) */
876 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
877
878 return TRUE;
879}
880
881
882/*
883 * nsp32_setup_sg_table - build scatter gather list for transfer data
884 * with bus master.
885 *
886 * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time.
887 */
888static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt)
889{
890 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
891 struct scatterlist *sgl;
892 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
893 int num, i;
894 u32_le l;
895
896 if (SCpnt->request_bufflen == 0) {
897 return TRUE;
898 }
899
900 if (sgt == NULL) {
901 nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null");
902 return FALSE;
903 }
904
905 if (SCpnt->use_sg) {
906 sgl = (struct scatterlist *)SCpnt->request_buffer;
907 num = pci_map_sg(data->Pci, sgl, SCpnt->use_sg,
908 SCpnt->sc_data_direction);
909 for (i = 0; i < num; i++) {
910 /*
911 * Build nsp32_sglist, substitute sg dma addresses.
912 */
913 sgt[i].addr = cpu_to_le32(sg_dma_address(sgl));
914 sgt[i].len = cpu_to_le32(sg_dma_len(sgl));
915 sgl++;
916
917 if (le32_to_cpu(sgt[i].len) > 0x10000) {
918 nsp32_msg(KERN_ERR,
919 "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len));
920 return FALSE;
921 }
922 nsp32_dbg(NSP32_DEBUG_SGLIST,
923 "num 0x%x : addr 0x%lx len 0x%lx",
924 i,
925 le32_to_cpu(sgt[i].addr),
926 le32_to_cpu(sgt[i].len ));
927 }
928
929 /* set end mark */
930 l = le32_to_cpu(sgt[num-1].len);
931 sgt[num-1].len = cpu_to_le32(l | SGTEND);
932
933 } else {
934 SCpnt->SCp.have_data_in = pci_map_single(data->Pci,
935 SCpnt->request_buffer, SCpnt->request_bufflen,
936 SCpnt->sc_data_direction);
937
938 sgt[0].addr = cpu_to_le32(SCpnt->SCp.have_data_in);
939 sgt[0].len = cpu_to_le32(SCpnt->request_bufflen | SGTEND); /* set end mark */
940
941 if (SCpnt->request_bufflen > 0x10000) {
942 nsp32_msg(KERN_ERR,
943 "can't transfer over 64KB at a time, size=0x%lx", SCpnt->request_bufflen);
944 return FALSE;
945 }
946 nsp32_dbg(NSP32_DEBUG_SGLIST, "single : addr 0x%lx len=0x%lx",
947 le32_to_cpu(sgt[0].addr),
948 le32_to_cpu(sgt[0].len ));
949 }
950
951 return TRUE;
952}
953
954static int nsp32_queuecommand(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
955{
956 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
957 nsp32_target *target;
958 nsp32_lunt *cur_lunt;
959 int ret;
960
961 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
962 "enter. target: 0x%x LUN: 0x%x cmnd: 0x%x cmndlen: 0x%x "
963 "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x",
964 SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len,
965 SCpnt->use_sg, SCpnt->request_buffer, SCpnt->request_bufflen);
966
967 if (data->CurrentSC != NULL) {
968 nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request");
969 data->CurrentSC = NULL;
970 SCpnt->result = DID_NO_CONNECT << 16;
971 done(SCpnt);
972 return 0;
973 }
974
975 /* check target ID is not same as this initiator ID */
422c0d61 976 if (scmd_id(SCpnt) == SCpnt->device->host->this_id) {
1da177e4
LT		 977 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "terget==host???");
978 SCpnt->result = DID_BAD_TARGET << 16;
979 done(SCpnt);
980 return 0;
981 }
982
983 /* check target LUN is allowable value */
984 if (SCpnt->device->lun >= MAX_LUN) {
985 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun");
986 SCpnt->result = DID_BAD_TARGET << 16;
987 done(SCpnt);
988 return 0;
989 }
990
991 show_command(SCpnt);
992
993 SCpnt->scsi_done = done;
994 data->CurrentSC = SCpnt;
995 SCpnt->SCp.Status = CHECK_CONDITION;
996 SCpnt->SCp.Message = 0;
997 SCpnt->resid = SCpnt->request_bufflen;
998
999 SCpnt->SCp.ptr = (char *) SCpnt->request_buffer;
1000 SCpnt->SCp.this_residual = SCpnt->request_bufflen;
1001 SCpnt->SCp.buffer = NULL;
1002 SCpnt->SCp.buffers_residual = 0;
1003
1004 /* initialize data */
1005 data->msgout_len = 0;
1006 data->msgin_len = 0;
1007 cur_lunt = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]);
1008 cur_lunt->SCpnt = SCpnt;
1009 cur_lunt->save_datp = 0;
1010 cur_lunt->msgin03 = FALSE;
1011 data->cur_lunt = cur_lunt;
1012 data->cur_id = SCpnt->device->id;
1013 data->cur_lun = SCpnt->device->lun;
1014
1015 ret = nsp32_setup_sg_table(SCpnt);
1016 if (ret == FALSE) {
1017 nsp32_msg(KERN_ERR, "SGT fail");
1018 SCpnt->result = DID_ERROR << 16;
1019 nsp32_scsi_done(SCpnt);
1020 return 0;
1021 }
1022
1023 /* Build IDENTIFY */
1024 nsp32_build_identify(SCpnt);
1025
1026 /*
1027 * If target is the first time to transfer after the reset
1028 * (target don't have SDTR_DONE and SDTR_INITIATOR), sync
1029 * message SDTR is needed to do synchronous transfer.
1030 */
422c0d61 1031 target = &data->target[scmd_id(SCpnt)];
1da177e4
LT		 1032 data->cur_target = target;
1033
1034 if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) {
1035 unsigned char period, offset;
1036
1037 if (trans_mode != ASYNC_MODE) {
1038 nsp32_set_max_sync(data, target, &period, &offset);
1039 nsp32_build_sdtr(SCpnt, period, offset);
1040 target->sync_flag |= SDTR_INITIATOR;
1041 } else {
1042 nsp32_set_async(data, target);
1043 target->sync_flag |= SDTR_DONE;
1044 }
1045
1046 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1047 "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n",
1048 target->limit_entry, period, offset);
1049 } else if (target->sync_flag & SDTR_INITIATOR) {
1050 /*
1051 * It was negotiating SDTR with target, sending from the
1052 * initiator, but there are no chance to remove this flag.
1053 * Set async because we don't get proper negotiation.
1054 */
1055 nsp32_set_async(data, target);
1056 target->sync_flag &= ~SDTR_INITIATOR;
1057 target->sync_flag |= SDTR_DONE;
1058
1059 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1060 "SDTR_INITIATOR: fall back to async");
1061 } else if (target->sync_flag & SDTR_TARGET) {
1062 /*
1063 * It was negotiating SDTR with target, sending from target,
1064 * but there are no chance to remove this flag. Set async
1065 * because we don't get proper negotiation.
1066 */
1067 nsp32_set_async(data, target);
1068 target->sync_flag &= ~SDTR_TARGET;
1069 target->sync_flag |= SDTR_DONE;
1070
1071 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1072 "Unknown SDTR from target is reached, fall back to async.");
1073 }
1074
1075 nsp32_dbg(NSP32_DEBUG_TARGETFLAG,
1076 "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x",
1077 SCpnt->device->id, target->sync_flag, target->syncreg,
1078 target->ackwidth);
1079
1080 /* Selection */
1081 if (auto_param == 0) {
1082 ret = nsp32_selection_autopara(SCpnt);
1083 } else {
1084 ret = nsp32_selection_autoscsi(SCpnt);
1085 }
1086
1087 if (ret != TRUE) {
1088 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail");
1089 nsp32_scsi_done(SCpnt);
1090 }
1091
1092 return 0;
1093}
1094
1095/* initialize asic */
1096static int nsp32hw_init(nsp32_hw_data *data)
1097{
1098 unsigned int base = data->BaseAddress;
1099 unsigned short irq_stat;
1100 unsigned long lc_reg;
1101 unsigned char power;
1102
1103 lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE);
1104 if ((lc_reg & 0xff00) == 0) {
1105 lc_reg |= (0x20 << 8);
1106 nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff);
1107 }
1108
1109 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
1110 nsp32_write2(base, TRANSFER_CONTROL, 0);
1111 nsp32_write4(base, BM_CNT, 0);
1112 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1113
1114 do {
1115 irq_stat = nsp32_read2(base, IRQ_STATUS);
1116 nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat);
1117 } while (irq_stat & IRQSTATUS_ANY_IRQ);
1118
1119 /*
1120 * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is
1121 * designated by specification.
1122 */
1123 if ((data->trans_method & NSP32_TRANSFER_PIO) ||
1124 (data->trans_method & NSP32_TRANSFER_MMIO)) {
1125 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x40);
1126 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40);
1127 } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
1128 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x10);
1129 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60);
1130 } else {
1131 nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode");
1132 }
1133
1134 nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x",
1135 nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT),
1136 nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT));
1137
1138 nsp32_index_write1(base, CLOCK_DIV, data->clock);
1139 nsp32_index_write1(base, BM_CYCLE, MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD);
1140 nsp32_write1(base, PARITY_CONTROL, 0); /* parity check is disable */
1141
1142 /*
1143 * initialize MISC_WRRD register
1144 *
1145 * Note: Designated parameters is obeyed as following:
1146 * MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set.
1147 * MISC_MASTER_TERMINATION_SELECT: It must be set.
1148 * MISC_BMREQ_NEGATE_TIMING_SEL: It should be set.
1149 * MISC_AUTOSEL_TIMING_SEL: It should be set.
1150 * MISC_BMSTOP_CHANGE2_NONDATA_PHASE: It should be set.
1151 * MISC_DELAYED_BMSTART: It's selected for safety.
1152 *
1153 * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then
1154 * we have to set TRANSFERCONTROL_BM_START as 0 and set
1155 * appropriate value before restarting bus master transfer.
1156 */
1157 nsp32_index_write2(base, MISC_WR,
1158 (SCSI_DIRECTION_DETECTOR_SELECT |
1159 DELAYED_BMSTART |
1160 MASTER_TERMINATION_SELECT |
1161 BMREQ_NEGATE_TIMING_SEL |
1162 AUTOSEL_TIMING_SEL |
1163 BMSTOP_CHANGE2_NONDATA_PHASE));
1164
1165 nsp32_index_write1(base, TERM_PWR_CONTROL, 0);
1166 power = nsp32_index_read1(base, TERM_PWR_CONTROL);
1167 if (!(power & SENSE)) {
1168 nsp32_msg(KERN_INFO, "term power on");
1169 nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR);
1170 }
1171
1172 nsp32_write2(base, TIMER_SET, TIMER_STOP);
1173 nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */
1174
1175 nsp32_write1(base, SYNC_REG, 0);
1176 nsp32_write1(base, ACK_WIDTH, 0);
1177 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
1178
1179 /*
1180 * enable to select designated IRQ (except for
1181 * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR)
1182 */
1183 nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ |
1184 IRQSELECT_SCSIRESET_IRQ |
1185 IRQSELECT_FIFO_SHLD_IRQ |
1186 IRQSELECT_RESELECT_IRQ |
1187 IRQSELECT_PHASE_CHANGE_IRQ |
1188 IRQSELECT_AUTO_SCSI_SEQ_IRQ |
1189 // IRQSELECT_BMCNTERR_IRQ |
1190 IRQSELECT_TARGET_ABORT_IRQ |
1191 IRQSELECT_MASTER_ABORT_IRQ );
1192 nsp32_write2(base, IRQ_CONTROL, 0);
1193
1194 /* PCI LED off */
1195 nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF);
1196 nsp32_index_write1(base, EXT_PORT, LED_OFF);
1197
1198 return TRUE;
1199}
1200
1201
1202/* interrupt routine */
1203static irqreturn_t do_nsp32_isr(int irq, void *dev_id, struct pt_regs *regs)
1204{
1205 nsp32_hw_data *data = dev_id;
1206 unsigned int base = data->BaseAddress;
1207 struct scsi_cmnd *SCpnt = data->CurrentSC;
1208 unsigned short auto_stat, irq_stat, trans_stat;
1209 unsigned char busmon, busphase;
1210 unsigned long flags;
1211 int ret;
1212 int handled = 0;
1213
1214#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1215 struct Scsi_Host *host = data->Host;
1216 spin_lock_irqsave(host->host_lock, flags);
1217#else
1218 spin_lock_irqsave(&io_request_lock, flags);
1219#endif
1220
1221 /*
1222 * IRQ check, then enable IRQ mask
1223 */
1224 irq_stat = nsp32_read2(base, IRQ_STATUS);
1225 nsp32_dbg(NSP32_DEBUG_INTR,
1226 "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat);
1227 /* is this interrupt comes from Ninja asic? */
1228 if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) {
1229 nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat);
1230 goto out2;
1231 }
1232 handled = 1;
1233 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
1234
1235 busmon = nsp32_read1(base, SCSI_BUS_MONITOR);
1236 busphase = busmon & BUSMON_PHASE_MASK;
1237
1238 trans_stat = nsp32_read2(base, TRANSFER_STATUS);
1239 if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) {
1240 nsp32_msg(KERN_INFO, "card disconnect");
1241 if (data->CurrentSC != NULL) {
1242 nsp32_msg(KERN_INFO, "clean up current SCSI command");
1243 SCpnt->result = DID_BAD_TARGET << 16;
1244 nsp32_scsi_done(SCpnt);
1245 }
1246 goto out;
1247 }
1248
1249 /* Timer IRQ */
1250 if (irq_stat & IRQSTATUS_TIMER_IRQ) {
1251 nsp32_dbg(NSP32_DEBUG_INTR, "timer stop");
1252 nsp32_write2(base, TIMER_SET, TIMER_STOP);
1253 goto out;
1254 }
1255
1256 /* SCSI reset */
1257 if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) {
1258 nsp32_msg(KERN_INFO, "detected someone do bus reset");
1259 nsp32_do_bus_reset(data);
1260 if (SCpnt != NULL) {
1261 SCpnt->result = DID_RESET << 16;
1262 nsp32_scsi_done(SCpnt);
1263 }
1264 goto out;
1265 }
1266
1267 if (SCpnt == NULL) {
1268 nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened");
1269 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1270 goto out;
1271 }
1272
1273 /*
1274 * AutoSCSI Interrupt.
1275 * Note: This interrupt is occurred when AutoSCSI is finished. Then
1276 * check SCSIEXECUTEPHASE, and do appropriate action. Each phases are
1277 * recorded when AutoSCSI sequencer has been processed.
1278 */
1279 if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) {
1280 /* getting SCSI executed phase */
1281 auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE);
1282 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1283
1284 /* Selection Timeout, go busfree phase. */
1285 if (auto_stat & SELECTION_TIMEOUT) {
1286 nsp32_dbg(NSP32_DEBUG_INTR,
1287 "selection timeout occurred");
1288
1289 SCpnt->result = DID_TIME_OUT << 16;
1290 nsp32_scsi_done(SCpnt);
1291 goto out;
1292 }
1293
1294 if (auto_stat & MSGOUT_PHASE) {
1295 /*
1296 * MsgOut phase was processed.
1297 * If MSG_IN_OCCUER is not set, then MsgOut phase is
1298 * completed. Thus, msgout_len must reset. Otherwise,
1299 * nothing to do here. If MSG_OUT_OCCUER is occurred,
1300 * then we will encounter the condition and check.
1301 */
1302 if (!(auto_stat & MSG_IN_OCCUER) &&
1303 (data->msgout_len <= 3)) {
1304 /*
1305 * !MSG_IN_OCCUER && msgout_len <=3
1306 * ---> AutoSCSI with MSGOUTreg is processed.
1307 */
1308 data->msgout_len = 0;
1309 };
1310
1311 nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed");
1312 }
1313
1314 if ((auto_stat & DATA_IN_PHASE) &&
1315 (SCpnt->resid > 0) &&
1316 ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) {
1317 printk( "auto+fifo\n");
1318 //nsp32_pio_read(SCpnt);
1319 }
1320
1321 if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) {
1322 /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */
1323 nsp32_dbg(NSP32_DEBUG_INTR,
1324 "Data in/out phase processed");
1325
1326 /* read BMCNT, SGT pointer addr */
1327 nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx",
1328 nsp32_read4(base, BM_CNT));
1329 nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx",
1330 nsp32_read4(base, SGT_ADR));
1331 nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx",
1332 nsp32_read4(base, SACK_CNT));
1333 nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx",
1334 nsp32_read4(base, SAVED_SACK_CNT));
1335
1336 SCpnt->resid = 0; /* all data transfered! */
1337 }
1338
1339 /*
1340 * MsgIn Occur
1341 */
1342 if (auto_stat & MSG_IN_OCCUER) {
1343 nsp32_msgin_occur(SCpnt, irq_stat, auto_stat);
1344 }
1345
1346 /*
1347 * MsgOut Occur
1348 */
1349 if (auto_stat & MSG_OUT_OCCUER) {
1350 nsp32_msgout_occur(SCpnt);
1351 }
1352
1353 /*
1354 * Bus Free Occur
1355 */
1356 if (auto_stat & BUS_FREE_OCCUER) {
1357 ret = nsp32_busfree_occur(SCpnt, auto_stat);
1358 if (ret == TRUE) {
1359 goto out;
1360 }
1361 }
1362
1363 if (auto_stat & STATUS_PHASE) {
1364 /*
1365 * Read CSB and substitute CSB for SCpnt->result
1366 * to save status phase stutas byte.
1367 * scsi error handler checks host_byte (DID_*:
1368 * low level driver to indicate status), then checks
1369 * status_byte (SCSI status byte).
1370 */
1371 SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN);
1372 }
1373
1374 if (auto_stat & ILLEGAL_PHASE) {
1375 /* Illegal phase is detected. SACK is not back. */
1376 nsp32_msg(KERN_WARNING,
1377 "AUTO SCSI ILLEGAL PHASE OCCUR!!!!");
1378
1379 /* TODO: currently we don't have any action... bus reset? */
1380
1381 /*
1382 * To send back SACK, assert, wait, and negate.
1383 */
1384 nsp32_sack_assert(data);
1385 nsp32_wait_req(data, NEGATE);
1386 nsp32_sack_negate(data);
1387
1388 }
1389
1390 if (auto_stat & COMMAND_PHASE) {
1391 /* nothing to do */
1392 nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed");
1393 }
1394
1395 if (auto_stat & AUTOSCSI_BUSY) {
1396 /* AutoSCSI is running */
1397 }
1398
1399 show_autophase(auto_stat);
1400 }
1401
1402 /* FIFO_SHLD_IRQ */
1403 if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) {
1404 nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ");
1405
1406 switch(busphase) {
1407 case BUSPHASE_DATA_OUT:
1408 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write");
1409
1410 //nsp32_pio_write(SCpnt);
1411
1412 break;
1413
1414 case BUSPHASE_DATA_IN:
1415 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read");
1416
1417 //nsp32_pio_read(SCpnt);
1418
1419 break;
1420
1421 case BUSPHASE_STATUS:
1422 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");
1423
1424 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1425
1426 break;
1427 default:
1428 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase");
1429 nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1430 show_busphase(busphase);
1431 break;
1432 }
1433
1434 goto out;
1435 }
1436
1437 /* Phase Change IRQ */
1438 if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) {
1439 nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ");
1440
1441 switch(busphase) {
1442 case BUSPHASE_MESSAGE_IN:
1443 nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in");
1444 nsp32_msgin_occur(SCpnt, irq_stat, 0);
1445 break;
1446 default:
1447 nsp32_msg(KERN_WARNING, "phase chg/other phase?");
1448 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n",
1449 irq_stat, trans_stat);
1450 show_busphase(busphase);
1451 break;
1452 }
1453 goto out;
1454 }
1455
1456 /* PCI_IRQ */
1457 if (irq_stat & IRQSTATUS_PCI_IRQ) {
1458 nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred");
1459 /* Do nothing */
1460 }
1461
1462 /* BMCNTERR_IRQ */
1463 if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) {
1464 nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! ");
1465 /*
1466 * TODO: To be implemented improving bus master
1467 * transfer reliablity when BMCNTERR is occurred in
1468 * AutoSCSI phase described in specification.
1469 */
1470 }
1471
1472#if 0
1473 nsp32_dbg(NSP32_DEBUG_INTR,
1474 "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1475 show_busphase(busphase);
1476#endif
1477
1478 out:
1479 /* disable IRQ mask */
1480 nsp32_write2(base, IRQ_CONTROL, 0);
1481
1482 out2:
1483#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
1484 spin_unlock_irqrestore(host->host_lock, flags);
1485#else
1486 spin_unlock_irqrestore(&io_request_lock, flags);
1487#endif
1488
1489 nsp32_dbg(NSP32_DEBUG_INTR, "exit");
1490
1491 return IRQ_RETVAL(handled);
1492}
1493
1494#undef SPRINTF
1495#define SPRINTF(args...) \
1496 do { \
1497 if(length > (pos - buffer)) { \
1498 pos += snprintf(pos, length - (pos - buffer) + 1, ## args); \
1499 nsp32_dbg(NSP32_DEBUG_PROC, "buffer=0x%p pos=0x%p length=%d %d\n", buffer, pos, length, length - (pos - buffer));\
1500 } \
1501 } while(0)
1502static int nsp32_proc_info(
1503#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
1504 struct Scsi_Host *host,
1505#endif
1506 char *buffer,
1507 char **start,
1508 off_t offset,
1509 int length,
1510#if !(LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
1511 int hostno,
1512#endif
1513 int inout)
1514{
1515 char *pos = buffer;
1516 int thislength;
1517 unsigned long flags;
1518 nsp32_hw_data *data;
1519#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
1520 int hostno;
1521#else
1522 struct Scsi_Host *host;
1523#endif
1524 unsigned int base;
1525 unsigned char mode_reg;
1526 int id, speed;
1527 long model;
1528
1529 /* Write is not supported, just return. */
1530 if (inout == TRUE) {
1531 return -EINVAL;
1532 }
1533
1534#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
1535 hostno = host->host_no;
1536#else
1537 /* search this HBA host */
1538 host = scsi_host_hn_get(hostno);
1539 if (host == NULL) {
1540 return -ESRCH;
1541 }
1542#endif
1543 data = (nsp32_hw_data *)host->hostdata;
1544 base = host->io_port;
1545
1546 SPRINTF("NinjaSCSI-32 status\n\n");
1547 SPRINTF("Driver version: %s, $Revision: 1.33 $\n", nsp32_release_version);
1548 SPRINTF("SCSI host No.: %d\n", hostno);
1549 SPRINTF("IRQ: %d\n", host->irq);
1550 SPRINTF("IO: 0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1);
1551 SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1);
1552 SPRINTF("sg_tablesize: %d\n", host->sg_tablesize);
1553 SPRINTF("Chip revision: 0x%x\n", (nsp32_read2(base, INDEX_REG) >> 8) & 0xff);
1554
1555 mode_reg = nsp32_index_read1(base, CHIP_MODE);
1556 model = data->pci_devid->driver_data;
1557
1558#ifdef CONFIG_PM
1559 SPRINTF("Power Management: %s\n", (mode_reg & OPTF) ? "yes" : "no");
1560#endif
1561 SPRINTF("OEM: %ld, %s\n", (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
1562
1563 spin_lock_irqsave(&(data->Lock), flags);
1564 SPRINTF("CurrentSC: 0x%p\n\n", data->CurrentSC);
1565 spin_unlock_irqrestore(&(data->Lock), flags);
1566
1567
1568 SPRINTF("SDTR status\n");
1569 for (id = 0; id < ARRAY_SIZE(data->target); id++) {
1570
1571 SPRINTF("id %d: ", id);
1572
1573 if (id == host->this_id) {
1574 SPRINTF("----- NinjaSCSI-32 host adapter\n");
1575 continue;
1576 }
1577
1578 if (data->target[id].sync_flag == SDTR_DONE) {
1579 if (data->target[id].period == 0 &&
1580 data->target[id].offset == ASYNC_OFFSET ) {
1581 SPRINTF("async");
1582 } else {
1583 SPRINTF(" sync");
1584 }
1585 } else {
1586 SPRINTF(" none");
1587 }
1588
1589 if (data->target[id].period != 0) {
1590
1591 speed = 1000000 / (data->target[id].period * 4);
1592
1593 SPRINTF(" transfer %d.%dMB/s, offset %d",
1594 speed / 1000,
1595 speed % 1000,
1596 data->target[id].offset
1597 );
1598 }
1599 SPRINTF("\n");
1600 }
1601
1602
1603 thislength = pos - (buffer + offset);
1604
1605 if(thislength < 0) {
1606 *start = NULL;
1607 return 0;
1608 }
1609
1610
1611 thislength = min(thislength, length);
1612 *start = buffer + offset;
1613
1614 return thislength;
1615}
1616#undef SPRINTF
1617
1618
1619
1620/*
1621 * Reset parameters and call scsi_done for data->cur_lunt.
1622 * Be careful setting SCpnt->result = DID_* before calling this function.
1623 */
1624static void nsp32_scsi_done(struct scsi_cmnd *SCpnt)
1625{
1626 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1627 unsigned int base = SCpnt->device->host->io_port;
1628
1629 /*
1630 * unmap pci
1631 */
1632 if (SCpnt->request_bufflen == 0) {
1633 goto skip;
1634 }
1635
1636 if (SCpnt->use_sg) {
1637 pci_unmap_sg(data->Pci,
1638 (struct scatterlist *)SCpnt->buffer,
1639 SCpnt->use_sg, SCpnt->sc_data_direction);
1640 } else {
1641 pci_unmap_single(data->Pci,
1642 (u32)SCpnt->SCp.have_data_in,
1643 SCpnt->request_bufflen,
1644 SCpnt->sc_data_direction);
1645 }
1646
1647 skip:
1648 /*
1649 * clear TRANSFERCONTROL_BM_START
1650 */
1651 nsp32_write2(base, TRANSFER_CONTROL, 0);
1652 nsp32_write4(base, BM_CNT, 0);
1653
1654 /*
1655 * call scsi_done
1656 */
1657 (*SCpnt->scsi_done)(SCpnt);
1658
1659 /*
1660 * reset parameters
1661 */
1662 data->cur_lunt->SCpnt = NULL;
1663 data->cur_lunt = NULL;
1664 data->cur_target = NULL;
1665 data->CurrentSC = NULL;
1666}
1667
1668
1669/*
1670 * Bus Free Occur
1671 *
1672 * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase
1673 * with ACK reply when below condition is matched:
1674 * MsgIn 00: Command Complete.
1675 * MsgIn 02: Save Data Pointer.
1676 * MsgIn 04: Diconnect.
1677 * In other case, unexpected BUSFREE is detected.
1678 */
1679static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
1680{
1681 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1682 unsigned int base = SCpnt->device->host->io_port;
1683
1684 nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph);
1685 show_autophase(execph);
1686
1687 nsp32_write4(base, BM_CNT, 0);
1688 nsp32_write2(base, TRANSFER_CONTROL, 0);
1689
1690 /*
1691 * MsgIn 02: Save Data Pointer
1692 *
1693 * VALID:
1694 * Save Data Pointer is received. Adjust pointer.
1695 *
1696 * NO-VALID:
1697 * SCSI-3 says if Save Data Pointer is not received, then we restart
1698 * processing and we can't adjust any SCSI data pointer in next data
1699 * phase.
1700 */
1701 if (execph & MSGIN_02_VALID) {
1702 nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid");
1703
1704 /*
1705 * Check sack_cnt/saved_sack_cnt, then adjust sg table if
1706 * needed.
1707 */
1708 if (!(execph & MSGIN_00_VALID) &&
1709 ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) {
1710 unsigned int sacklen, s_sacklen;
1711
1712 /*
1713 * Read SACK count and SAVEDSACK count, then compare.
1714 */
1715 sacklen = nsp32_read4(base, SACK_CNT );
1716 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
1717
1718 /*
1719 * If SAVEDSACKCNT == 0, it means SavedDataPointer is
1720 * come after data transfering.
1721 */
1722 if (s_sacklen > 0) {
1723 /*
1724 * Comparing between sack and savedsack to
1725 * check the condition of AutoMsgIn03.
1726 *
1727 * If they are same, set msgin03 == TRUE,
1728 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at
1729 * reselection. On the other hand, if they
1730 * aren't same, set msgin03 == FALSE, and
1731 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at
1732 * reselection.
1733 */
1734 if (sacklen != s_sacklen) {
1735 data->cur_lunt->msgin03 = FALSE;
1736 } else {
1737 data->cur_lunt->msgin03 = TRUE;
1738 }
1739
1740 nsp32_adjust_busfree(SCpnt, s_sacklen);
1741 }
1742 }
1743
1744 /* This value has not substitude with valid value yet... */
1745 //data->cur_lunt->save_datp = data->cur_datp;
1746 } else {
1747 /*
1748 * no processing.
1749 */
1750 }
1751
1752 if (execph & MSGIN_03_VALID) {
1753 /* MsgIn03 was valid to be processed. No need processing. */
1754 }
1755
1756 /*
1757 * target SDTR check
1758 */
1759 if (data->cur_target->sync_flag & SDTR_INITIATOR) {
1760 /*
1761 * SDTR negotiation pulled by the initiator has not
1762 * finished yet. Fall back to ASYNC mode.
1763 */
1764 nsp32_set_async(data, data->cur_target);
1765 data->cur_target->sync_flag &= ~SDTR_INITIATOR;
1766 data->cur_target->sync_flag |= SDTR_DONE;
1767 } else if (data->cur_target->sync_flag & SDTR_TARGET) {
1768 /*
1769 * SDTR negotiation pulled by the target has been
1770 * negotiating.
1771 */
1772 if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) {
1773 /*
1774 * If valid message is received, then
1775 * negotiation is succeeded.
1776 */
1777 } else {
1778 /*
1779 * On the contrary, if unexpected bus free is
1780 * occurred, then negotiation is failed. Fall
1781 * back to ASYNC mode.
1782 */
1783 nsp32_set_async(data, data->cur_target);
1784 }
1785 data->cur_target->sync_flag &= ~SDTR_TARGET;
1786 data->cur_target->sync_flag |= SDTR_DONE;
1787 }
1788
1789 /*
1790 * It is always ensured by SCSI standard that initiator
1791 * switches into Bus Free Phase after
1792 * receiving message 00 (Command Complete), 04 (Disconnect).
1793 * It's the reason that processing here is valid.
1794 */
1795 if (execph & MSGIN_00_VALID) {
1796 /* MsgIn 00: Command Complete */
1797 nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");
1798
1799 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1800 SCpnt->SCp.Message = 0;
1801 nsp32_dbg(NSP32_DEBUG_BUSFREE,
1802 "normal end stat=0x%x resid=0x%x\n",
1803 SCpnt->SCp.Status, SCpnt->resid);
1804 SCpnt->result = (DID_OK << 16) |
1805 (SCpnt->SCp.Message << 8) |
1806 (SCpnt->SCp.Status << 0);
1807 nsp32_scsi_done(SCpnt);
1808 /* All operation is done */
1809 return TRUE;
1810 } else if (execph & MSGIN_04_VALID) {
1811 /* MsgIn 04: Disconnect */
1812 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1813 SCpnt->SCp.Message = 4;
1814
1815 nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
1816 return TRUE;
1817 } else {
1818 /* Unexpected bus free */
1819 nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
1820
1821 /* DID_ERROR? */
1822 //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0);
1823 SCpnt->result = DID_ERROR << 16;
1824 nsp32_scsi_done(SCpnt);
1825 return TRUE;
1826 }
1827 return FALSE;
1828}
1829
1830
1831/*
1832 * nsp32_adjust_busfree - adjusting SG table
1833 *
1834 * Note: This driver adjust the SG table using SCSI ACK
1835 * counter instead of BMCNT counter!
1836 */
1837static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen)
1838{
1839 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1840 int old_entry = data->cur_entry;
1841 int new_entry;
1842 int sg_num = data->cur_lunt->sg_num;
1843 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
1844 unsigned int restlen, sentlen;
1845 u32_le len, addr;
1846
1847 nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", SCpnt->resid);
1848
1849 /* adjust saved SACK count with 4 byte start address boundary */
1850 s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3;
1851
1852 /*
1853 * calculate new_entry from sack count and each sgt[].len
1854 * calculate the byte which is intent to send
1855 */
1856 sentlen = 0;
1857 for (new_entry = old_entry; new_entry < sg_num; new_entry++) {
1858 sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND);
1859 if (sentlen > s_sacklen) {
1860 break;
1861 }
1862 }
1863
1864 /* all sgt is processed */
1865 if (new_entry == sg_num) {
1866 goto last;
1867 }
1868
1869 if (sentlen == s_sacklen) {
1870 /* XXX: confirm it's ok or not */
1871 /* In this case, it's ok because we are at
1872 the head element of the sg. restlen is correctly calculated. */
1873 }
1874
1875 /* calculate the rest length for transfering */
1876 restlen = sentlen - s_sacklen;
1877
1878 /* update adjusting current SG table entry */
1879 len = le32_to_cpu(sgt[new_entry].len);
1880 addr = le32_to_cpu(sgt[new_entry].addr);
1881 addr += (len - restlen);
1882 sgt[new_entry].addr = cpu_to_le32(addr);
1883 sgt[new_entry].len = cpu_to_le32(restlen);
1884
1885 /* set cur_entry with new_entry */
1886 data->cur_entry = new_entry;
1887
1888 return;
1889
1890 last:
1891 if (SCpnt->resid < sentlen) {
1892 nsp32_msg(KERN_ERR, "resid underflow");
1893 }
1894
1895 SCpnt->resid -= sentlen;
1896 nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", SCpnt->resid);
1897
1898 /* update hostdata and lun */
1899
1900 return;
1901}
1902
1903
1904/*
1905 * It's called MsgOut phase occur.
1906 * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in
1907 * message out phase. It, however, has more than 3 messages,
1908 * HBA creates the interrupt and we have to process by hand.
1909 */
1910static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt)
1911{
1912 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1913 unsigned int base = SCpnt->device->host->io_port;
1914 //unsigned short command;
1915 long new_sgtp;
1916 int i;
1917
1918 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1919 "enter: msgout_len: 0x%x", data->msgout_len);
1920
1921 /*
1922 * If MsgOut phase is occurred without having any
1923 * message, then No_Operation is sent (SCSI-2).
1924 */
1925 if (data->msgout_len == 0) {
1926 nsp32_build_nop(SCpnt);
1927 }
1928
1929 /*
1930 * Set SGTP ADDR current entry for restarting AUTOSCSI,
1931 * because SGTP is incremented next point.
1932 * There is few statement in the specification...
1933 */
1934 new_sgtp = data->cur_lunt->sglun_paddr +
1935 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
1936
1937 /*
1938 * send messages
1939 */
1940 for (i = 0; i < data->msgout_len; i++) {
1941 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1942 "%d : 0x%x", i, data->msgoutbuf[i]);
1943
1944 /*
1945 * Check REQ is asserted.
1946 */
1947 nsp32_wait_req(data, ASSERT);
1948
1949 if (i == (data->msgout_len - 1)) {
1950 /*
1951 * If the last message, set the AutoSCSI restart
1952 * before send back the ack message. AutoSCSI
1953 * restart automatically negate ATN signal.
1954 */
1955 //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
1956 //nsp32_restart_autoscsi(SCpnt, command);
1957 nsp32_write2(base, COMMAND_CONTROL,
1958 (CLEAR_CDB_FIFO_POINTER |
1959 AUTO_COMMAND_PHASE |
1960 AUTOSCSI_RESTART |
1961 AUTO_MSGIN_00_OR_04 |
1962 AUTO_MSGIN_02 ));
1963 }
1964 /*
1965 * Write data with SACK, then wait sack is
1966 * automatically negated.
1967 */
1968 nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]);
1969 nsp32_wait_sack(data, NEGATE);
1970
1971 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n",
1972 nsp32_read1(base, SCSI_BUS_MONITOR));
1973 };
1974
1975 data->msgout_len = 0;
1976
1977 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit");
1978}
1979
1980/*
1981 * Restart AutoSCSI
1982 *
1983 * Note: Restarting AutoSCSI needs set:
1984 * SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL
1985 */
1986static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command)
1987{
1988 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1989 unsigned int base = data->BaseAddress;
1990 unsigned short transfer = 0;
1991
1992 nsp32_dbg(NSP32_DEBUG_RESTART, "enter");
1993
1994 if (data->cur_target == NULL || data->cur_lunt == NULL) {
1995 nsp32_msg(KERN_ERR, "Target or Lun is invalid");
1996 }
1997
1998 /*
1999 * set SYNC_REG
2000 * Don't set BM_START_ADR before setting this register.
2001 */
2002 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
2003
2004 /*
2005 * set ACKWIDTH
2006 */
2007 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
2008
2009 /*
2010 * set SREQ hazard killer sampling rate
2011 */
2012 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
2013
2014 /*
2015 * set SGT ADDR (physical address)
2016 */
2017 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
2018
2019 /*
2020 * set TRANSFER CONTROL REG
2021 */
2022 transfer = 0;
2023 transfer |= (TRANSFER_GO | ALL_COUNTER_CLR);
2024 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
2025 if (SCpnt->request_bufflen > 0) {
2026 transfer |= BM_START;
2027 }
2028 } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
2029 transfer |= CB_MMIO_MODE;
2030 } else if (data->trans_method & NSP32_TRANSFER_PIO) {
2031 transfer |= CB_IO_MODE;
2032 }
2033 nsp32_write2(base, TRANSFER_CONTROL, transfer);
2034
2035 /*
2036 * restart AutoSCSI
2037 *
2038 * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ?
2039 */
2040 command |= (CLEAR_CDB_FIFO_POINTER |
2041 AUTO_COMMAND_PHASE |
2042 AUTOSCSI_RESTART );
2043 nsp32_write2(base, COMMAND_CONTROL, command);
2044
2045 nsp32_dbg(NSP32_DEBUG_RESTART, "exit");
2046}
2047
2048
2049/*
2050 * cannot run automatically message in occur
2051 */
2052static void nsp32_msgin_occur(struct scsi_cmnd *SCpnt,
2053 unsigned long irq_status,
2054 unsigned short execph)
2055{
2056 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2057 unsigned int base = SCpnt->device->host->io_port;
2058 unsigned char msg;
2059 unsigned char msgtype;
2060 unsigned char newlun;
2061 unsigned short command = 0;
2062 int msgclear = TRUE;
2063 long new_sgtp;
2064 int ret;
2065
2066 /*
2067 * read first message
2068 * Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure
2069 * of Message-In have to be processed before sending back SCSI ACK.
2070 */
2071 msg = nsp32_read1(base, SCSI_DATA_IN);
2072 data->msginbuf[(unsigned char)data->msgin_len] = msg;
2073 msgtype = data->msginbuf[0];
2074 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR,
2075 "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x",
2076 data->msgin_len, msg, msgtype);
2077
2078 /*
2079 * TODO: We need checking whether bus phase is message in?
2080 */
2081
2082 /*
2083 * assert SCSI ACK
2084 */
2085 nsp32_sack_assert(data);
2086
2087 /*
2088 * processing IDENTIFY
2089 */
2090 if (msgtype & 0x80) {
2091 if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) {
2092 /* Invalid (non reselect) phase */
2093 goto reject;
2094 }
2095
2096 newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */
2097 ret = nsp32_reselection(SCpnt, newlun);
2098 if (ret == TRUE) {
2099 goto restart;
2100 } else {
2101 goto reject;
2102 }
2103 }
2104
2105 /*
2106 * processing messages except for IDENTIFY
2107 *
2108 * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO.
2109 */
2110 switch (msgtype) {
2111 /*
2112 * 1-byte message
2113 */
2114 case COMMAND_COMPLETE:
2115 case DISCONNECT:
2116 /*
2117 * These messages should not be occurred.
2118 * They should be processed on AutoSCSI sequencer.
2119 */
2120 nsp32_msg(KERN_WARNING,
2121 "unexpected message of AutoSCSI MsgIn: 0x%x", msg);
2122 break;
2123
2124 case RESTORE_POINTERS:
2125 /*
2126 * AutoMsgIn03 is disabled, and HBA gets this message.
2127 */
2128
2129 if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) {
2130 unsigned int s_sacklen;
2131
2132 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
2133 if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) {
2134 nsp32_adjust_busfree(SCpnt, s_sacklen);
2135 } else {
2136 /* No need to rewrite SGT */
2137 }
2138 }
2139 data->cur_lunt->msgin03 = FALSE;
2140
2141 /* Update with the new value */
2142
2143 /* reset SACK/SavedACK counter (or ALL clear?) */
2144 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
2145
2146 /*
2147 * set new sg pointer
2148 */
2149 new_sgtp = data->cur_lunt->sglun_paddr +
2150 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
2151 nsp32_write4(base, SGT_ADR, new_sgtp);
2152
2153 break;
2154
2155 case SAVE_POINTERS:
2156 /*
2157 * These messages should not be occurred.
2158 * They should be processed on AutoSCSI sequencer.
2159 */
2160 nsp32_msg (KERN_WARNING,
2161 "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS");
2162
2163 break;
2164
2165 case MESSAGE_REJECT:
2166 /* If previous message_out is sending SDTR, and get
2167 message_reject from target, SDTR negotiation is failed */
2168 if (data->cur_target->sync_flag &
2169 (SDTR_INITIATOR | SDTR_TARGET)) {
2170 /*
2171 * Current target is negotiating SDTR, but it's
2172 * failed. Fall back to async transfer mode, and set
2173 * SDTR_DONE.
2174 */
2175 nsp32_set_async(data, data->cur_target);
2176 data->cur_target->sync_flag &= ~SDTR_INITIATOR;
2177 data->cur_target->sync_flag |= SDTR_DONE;
2178
2179 }
2180 break;
2181
2182 case LINKED_CMD_COMPLETE:
2183 case LINKED_FLG_CMD_COMPLETE:
2184 /* queue tag is not supported currently */
2185 nsp32_msg (KERN_WARNING,
2186 "unsupported message: 0x%x", msgtype);
2187 break;
2188
2189 case INITIATE_RECOVERY:
2190 /* staring ECA (Extended Contingent Allegiance) state. */
2191 /* This message is declined in SPI2 or later. */
2192
2193 goto reject;
2194
2195 /*
2196 * 2-byte message
2197 */
2198 case SIMPLE_QUEUE_TAG:
2199 case 0x23:
2200 /*
2201 * 0x23: Ignore_Wide_Residue is not declared in scsi.h.
2202 * No support is needed.
2203 */
2204 if (data->msgin_len >= 1) {
2205 goto reject;
2206 }
2207
2208 /* current position is 1-byte of 2 byte */
2209 msgclear = FALSE;
2210
2211 break;
2212
2213 /*
2214 * extended message
2215 */
2216 case EXTENDED_MESSAGE:
2217 if (data->msgin_len < 1) {
2218 /*
2219 * Current position does not reach 2-byte
2220 * (2-byte is extended message length).
2221 */
2222 msgclear = FALSE;
2223 break;
2224 }
2225
2226 if ((data->msginbuf[1] + 1) > data->msgin_len) {
2227 /*
2228 * Current extended message has msginbuf[1] + 2
2229 * (msgin_len starts counting from 0, so buf[1] + 1).
2230 * If current message position is not finished,
2231 * continue receiving message.
2232 */
2233 msgclear = FALSE;
2234 break;
2235 }
2236
2237 /*
2238 * Reach here means regular length of each type of
2239 * extended messages.
2240 */
2241 switch (data->msginbuf[2]) {
2242 case EXTENDED_MODIFY_DATA_POINTER:
2243 /* TODO */
2244 goto reject; /* not implemented yet */
2245 break;
2246
2247 case EXTENDED_SDTR:
2248 /*
2249 * Exchange this message between initiator and target.
2250 */
2251 if (data->msgin_len != EXTENDED_SDTR_LEN + 1) {
2252 /*
2253 * received inappropriate message.
2254 */
2255 goto reject;
2256 break;
2257 }
2258
2259 nsp32_analyze_sdtr(SCpnt);
2260
2261 break;
2262
2263 case EXTENDED_EXTENDED_IDENTIFY:
2264 /* SCSI-I only, not supported. */
2265 goto reject; /* not implemented yet */
2266
2267 break;
2268
2269 case EXTENDED_WDTR:
2270 goto reject; /* not implemented yet */
2271
2272 break;
2273
2274 default:
2275 goto reject;
2276 }
2277 break;
2278
2279 default:
2280 goto reject;
2281 }
2282
2283 restart:
2284 if (msgclear == TRUE) {
2285 data->msgin_len = 0;
2286
2287 /*
2288 * If restarting AutoSCSI, but there are some message to out
2289 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0
2290 * (MV_VALID = 0). When commandcontrol is written with
2291 * AutoSCSI restart, at the same time MsgOutOccur should be
2292 * happened (however, such situation is really possible...?).
2293 */
2294 if (data->msgout_len > 0) {
2295 nsp32_write4(base, SCSI_MSG_OUT, 0);
2296 command |= AUTO_ATN;
2297 }
2298
2299 /*
2300 * restart AutoSCSI
2301 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed.
2302 */
2303 command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
2304
2305 /*
2306 * If current msgin03 is TRUE, then flag on.
2307 */
2308 if (data->cur_lunt->msgin03 == TRUE) {
2309 command |= AUTO_MSGIN_03;
2310 }
2311 data->cur_lunt->msgin03 = FALSE;
2312 } else {
2313 data->msgin_len++;
2314 }
2315
2316 /*
2317 * restart AutoSCSI
2318 */
2319 nsp32_restart_autoscsi(SCpnt, command);
2320
2321 /*
2322 * wait SCSI REQ negate for REQ-ACK handshake
2323 */
2324 nsp32_wait_req(data, NEGATE);
2325
2326 /*
2327 * negate SCSI ACK
2328 */
2329 nsp32_sack_negate(data);
2330
2331 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2332
2333 return;
2334
2335 reject:
2336 nsp32_msg(KERN_WARNING,
2337 "invalid or unsupported MessageIn, rejected. "
2338 "current msg: 0x%x (len: 0x%x), processing msg: 0x%x",
2339 msg, data->msgin_len, msgtype);
2340 nsp32_build_reject(SCpnt);
2341 data->msgin_len = 0;
2342
2343 goto restart;
2344}
2345
2346/*
2347 *
2348 */
2349static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt)
2350{
2351 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2352 nsp32_target *target = data->cur_target;
2353 nsp32_sync_table *synct;
2354 unsigned char get_period = data->msginbuf[3];
2355 unsigned char get_offset = data->msginbuf[4];
2356 int entry;
2357 int syncnum;
2358
2359 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
2360
2361 synct = data->synct;
2362 syncnum = data->syncnum;
2363
2364 /*
2365 * If this inititor sent the SDTR message, then target responds SDTR,
2366 * initiator SYNCREG, ACKWIDTH from SDTR parameter.
2367 * Messages are not appropriate, then send back reject message.
2368 * If initiator did not send the SDTR, but target sends SDTR,
2369 * initiator calculator the appropriate parameter and send back SDTR.
2370 */
2371 if (target->sync_flag & SDTR_INITIATOR) {
2372 /*
2373 * Initiator sent SDTR, the target responds and
2374 * send back negotiation SDTR.
2375 */
2376 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR");
2377
2378 target->sync_flag &= ~SDTR_INITIATOR;
2379 target->sync_flag |= SDTR_DONE;
2380
2381 /*
2382 * offset:
2383 */
2384 if (get_offset > SYNC_OFFSET) {
2385 /*
2386 * Negotiation is failed, the target send back
2387 * unexpected offset value.
2388 */
2389 goto reject;
2390 }
2391
2392 if (get_offset == ASYNC_OFFSET) {
2393 /*
2394 * Negotiation is succeeded, the target want
2395 * to fall back into asynchronous transfer mode.
2396 */
2397 goto async;
2398 }
2399
2400 /*
2401 * period:
2402 * Check whether sync period is too short. If too short,
2403 * fall back to async mode. If it's ok, then investigate
2404 * the received sync period. If sync period is acceptable
2405 * between sync table start_period and end_period, then
2406 * set this I_T nexus as sent offset and period.
2407 * If it's not acceptable, send back reject and fall back
2408 * to async mode.
2409 */
2410 if (get_period < data->synct[0].period_num) {
2411 /*
2412 * Negotiation is failed, the target send back
2413 * unexpected period value.
2414 */
2415 goto reject;
2416 }
2417
2418 entry = nsp32_search_period_entry(data, target, get_period);
2419
2420 if (entry < 0) {
2421 /*
2422 * Target want to use long period which is not
2423 * acceptable NinjaSCSI-32Bi/UDE.
2424 */
2425 goto reject;
2426 }
2427
2428 /*
2429 * Set new sync table and offset in this I_T nexus.
2430 */
2431 nsp32_set_sync_entry(data, target, entry, get_offset);
2432 } else {
2433 /* Target send SDTR to initiator. */
2434 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR");
2435
2436 target->sync_flag |= SDTR_INITIATOR;
2437
2438 /* offset: */
2439 if (get_offset > SYNC_OFFSET) {
2440 /* send back as SYNC_OFFSET */
2441 get_offset = SYNC_OFFSET;
2442 }
2443
2444 /* period: */
2445 if (get_period < data->synct[0].period_num) {
2446 get_period = data->synct[0].period_num;
2447 }
2448
2449 entry = nsp32_search_period_entry(data, target, get_period);
2450
2451 if (get_offset == ASYNC_OFFSET || entry < 0) {
2452 nsp32_set_async(data, target);
2453 nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET);
2454 } else {
2455 nsp32_set_sync_entry(data, target, entry, get_offset);
2456 nsp32_build_sdtr(SCpnt, get_period, get_offset);
2457 }
2458 }
2459
2460 target->period = get_period;
2461 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2462 return;
2463
2464 reject:
2465 /*
2466 * If the current message is unacceptable, send back to the target
2467 * with reject message.
2468 */
2469 nsp32_build_reject(SCpnt);
2470
2471 async:
2472 nsp32_set_async(data, target); /* set as ASYNC transfer mode */
2473
2474 target->period = 0;
2475 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async");
2476 return;
2477}
2478
2479
2480/*
2481 * Search config entry number matched in sync_table from given
2482 * target and speed period value. If failed to search, return negative value.
2483 */
2484static int nsp32_search_period_entry(nsp32_hw_data *data,
2485 nsp32_target *target,
2486 unsigned char period)
2487{
2488 int i;
2489
2490 if (target->limit_entry >= data->syncnum) {
2491 nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!");
2492 target->limit_entry = 0;
2493 }
2494
2495 for (i = target->limit_entry; i < data->syncnum; i++) {
2496 if (period >= data->synct[i].start_period &&
2497 period <= data->synct[i].end_period) {
2498 break;
2499 }
2500 }
2501
2502 /*
2503 * Check given period value is over the sync_table value.
2504 * If so, return max value.
2505 */
2506 if (i == data->syncnum) {
2507 i = -1;
2508 }
2509
2510 return i;
2511}
2512
2513
2514/*
2515 * target <-> initiator use ASYNC transfer
2516 */
2517static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target)
2518{
2519 unsigned char period = data->synct[target->limit_entry].period_num;
2520
2521 target->offset = ASYNC_OFFSET;
2522 target->period = 0;
2523 target->syncreg = TO_SYNCREG(period, ASYNC_OFFSET);
2524 target->ackwidth = 0;
2525 target->sample_reg = 0;
2526
2527 nsp32_dbg(NSP32_DEBUG_SYNC, "set async");
2528}
2529
2530
2531/*
2532 * target <-> initiator use maximum SYNC transfer
2533 */
2534static void nsp32_set_max_sync(nsp32_hw_data *data,
2535 nsp32_target *target,
2536 unsigned char *period,
2537 unsigned char *offset)
2538{
2539 unsigned char period_num, ackwidth;
2540
2541 period_num = data->synct[target->limit_entry].period_num;
2542 *period = data->synct[target->limit_entry].start_period;
2543 ackwidth = data->synct[target->limit_entry].ackwidth;
2544 *offset = SYNC_OFFSET;
2545
2546 target->syncreg = TO_SYNCREG(period_num, *offset);
2547 target->ackwidth = ackwidth;
2548 target->offset = *offset;
2549 target->sample_reg = 0; /* disable SREQ sampling */
2550}
2551
2552
2553/*
2554 * target <-> initiator use entry number speed
2555 */
2556static void nsp32_set_sync_entry(nsp32_hw_data *data,
2557 nsp32_target *target,
2558 int entry,
2559 unsigned char offset)
2560{
2561 unsigned char period, ackwidth, sample_rate;
2562
2563 period = data->synct[entry].period_num;
2564 ackwidth = data->synct[entry].ackwidth;
2565 offset = offset;
2566 sample_rate = data->synct[entry].sample_rate;
2567
2568 target->syncreg = TO_SYNCREG(period, offset);
2569 target->ackwidth = ackwidth;
2570 target->offset = offset;
2571 target->sample_reg = sample_rate | SAMPLING_ENABLE;
2572
2573 nsp32_dbg(NSP32_DEBUG_SYNC, "set sync");
2574}
2575
2576
2577/*
2578 * It waits until SCSI REQ becomes assertion or negation state.
2579 *
2580 * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then
2581 * connected target responds SCSI REQ negation. We have to wait
2582 * SCSI REQ becomes negation in order to negate SCSI ACK signal for
2583 * REQ-ACK handshake.
2584 */
2585static void nsp32_wait_req(nsp32_hw_data *data, int state)
2586{
2587 unsigned int base = data->BaseAddress;
2588 int wait_time = 0;
2589 unsigned char bus, req_bit;
2590
2591 if (!((state == ASSERT) || (state == NEGATE))) {
2592 nsp32_msg(KERN_ERR, "unknown state designation");
2593 }
2594 /* REQ is BIT(5) */
2595 req_bit = (state == ASSERT ? BUSMON_REQ : 0);
2596
2597 do {
2598 bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2599 if ((bus & BUSMON_REQ) == req_bit) {
2600 nsp32_dbg(NSP32_DEBUG_WAIT,
2601 "wait_time: %d", wait_time);
2602 return;
2603 }
2604 udelay(1);
2605 wait_time++;
2606 } while (wait_time < REQSACK_TIMEOUT_TIME);
2607
2608 nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit);
2609}
2610
2611/*
2612 * It waits until SCSI SACK becomes assertion or negation state.
2613 */
2614static void nsp32_wait_sack(nsp32_hw_data *data, int state)
2615{
2616 unsigned int base = data->BaseAddress;
2617 int wait_time = 0;
2618 unsigned char bus, ack_bit;
2619
2620 if (!((state == ASSERT) || (state == NEGATE))) {
2621 nsp32_msg(KERN_ERR, "unknown state designation");
2622 }
2623 /* ACK is BIT(4) */
2624 ack_bit = (state == ASSERT ? BUSMON_ACK : 0);
2625
2626 do {
2627 bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2628 if ((bus & BUSMON_ACK) == ack_bit) {
2629 nsp32_dbg(NSP32_DEBUG_WAIT,
2630 "wait_time: %d", wait_time);
2631 return;
2632 }
2633 udelay(1);
2634 wait_time++;
2635 } while (wait_time < REQSACK_TIMEOUT_TIME);
2636
2637 nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit);
2638}
2639
2640/*
2641 * assert SCSI ACK
2642 *
2643 * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1.
2644 */
2645static void nsp32_sack_assert(nsp32_hw_data *data)
2646{
2647 unsigned int base = data->BaseAddress;
2648 unsigned char busctrl;
2649
2650 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL);
2651 busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB);
2652 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2653}
2654
2655/*
2656 * negate SCSI ACK
2657 */
2658static void nsp32_sack_negate(nsp32_hw_data *data)
2659{
2660 unsigned int base = data->BaseAddress;
2661 unsigned char busctrl;
2662
2663 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL);
2664 busctrl &= ~BUSCTL_ACK;
2665 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2666}
2667
2668
2669
2670/*
2671 * Note: n_io_port is defined as 0x7f because I/O register port is
2672 * assigned as:
2673 * 0x800-0x8ff: memory mapped I/O port
2674 * 0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly)
2675 * 0xc00-0xfff: CardBus status registers
2676 */
2677#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
2678#define DETECT_OK 0
2679#define DETECT_NG 1
2680#define PCIDEV pdev
2681static int nsp32_detect(struct pci_dev *pdev)
2682#else
2683#define DETECT_OK 1
2684#define DETECT_NG 0
2685#define PCIDEV (data->Pci)
2686static int nsp32_detect(Scsi_Host_Template *sht)
2687#endif
2688{
2689 struct Scsi_Host *host; /* registered host structure */
2690 struct resource *res;
2691 nsp32_hw_data *data;
2692 int ret;
2693 int i, j;
2694
2695 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
2696
2697 /*
2698 * register this HBA as SCSI device
2699 */
2700#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
2701 host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data));
2702#else
2703 host = scsi_register(sht, sizeof(nsp32_hw_data));
2704#endif
2705 if (host == NULL) {
2706 nsp32_msg (KERN_ERR, "failed to scsi register");
2707 goto err;
2708 }
2709
2710 /*
2711 * set nsp32_hw_data
2712 */
2713 data = (nsp32_hw_data *)host->hostdata;
2714
2715 memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data));
2716
2717 host->irq = data->IrqNumber;
2718 host->io_port = data->BaseAddress;
2719 host->unique_id = data->BaseAddress;
2720 host->n_io_port = data->NumAddress;
2721 host->base = (unsigned long)data->MmioAddress;
12413197 2722#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,5,63))
1da177e4
LT		 2723 scsi_set_pci_device(host, PCIDEV);
2724#endif
2725
2726 data->Host = host;
2727 spin_lock_init(&(data->Lock));
2728
2729 data->cur_lunt = NULL;
2730 data->cur_target = NULL;
2731
2732 /*
2733 * Bus master transfer mode is supported currently.
2734 */
2735 data->trans_method = NSP32_TRANSFER_BUSMASTER;
2736
2737 /*
2738 * Set clock div, CLOCK_4 (HBA has own external clock, and
2739 * dividing * 100ns/4).
2740 * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet.
2741 */
2742 data->clock = CLOCK_4;
2743
2744 /*
2745 * Select appropriate nsp32_sync_table and set I_CLOCKDIV.
2746 */
2747 switch (data->clock) {
2748 case CLOCK_4:
2749 /* If data->clock is CLOCK_4, then select 40M sync table. */
2750 data->synct = nsp32_sync_table_40M;
2751 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2752 break;
2753 case CLOCK_2:
2754 /* If data->clock is CLOCK_2, then select 20M sync table. */
2755 data->synct = nsp32_sync_table_20M;
2756 data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M);
2757 break;
2758 case PCICLK:
2759 /* If data->clock is PCICLK, then select pci sync table. */
2760 data->synct = nsp32_sync_table_pci;
2761 data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci);
2762 break;
2763 default:
2764 nsp32_msg(KERN_WARNING,
2765 "Invalid clock div is selected, set CLOCK_4.");
2766 /* Use default value CLOCK_4 */
2767 data->clock = CLOCK_4;
2768 data->synct = nsp32_sync_table_40M;
2769 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2770 }
2771
2772 /*
2773 * setup nsp32_lunt
2774 */
2775
2776 /*
2777 * setup DMA
2778 */
2779 if (pci_set_dma_mask(PCIDEV, 0xffffffffUL) != 0) {
2780 nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
2781 goto scsi_unregister;
2782 }
2783
2784 /*
2785 * allocate autoparam DMA resource.
2786 */
2787 data->autoparam = pci_alloc_consistent(PCIDEV, sizeof(nsp32_autoparam), &(data->auto_paddr));
2788 if (data->autoparam == NULL) {
2789 nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2790 goto scsi_unregister;
2791 }
2792
2793 /*
2794 * allocate scatter-gather DMA resource.
2795 */
2796 data->sg_list = pci_alloc_consistent(PCIDEV, NSP32_SG_TABLE_SIZE,
2797 &(data->sg_paddr));
2798 if (data->sg_list == NULL) {
2799 nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2800 goto free_autoparam;
2801 }
2802
2803 for (i = 0; i < ARRAY_SIZE(data->lunt); i++) {
2804 for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) {
2805 int offset = i * ARRAY_SIZE(data->lunt[0]) + j;
2806 nsp32_lunt tmp = {
2807 .SCpnt = NULL,
2808 .save_datp = 0,
2809 .msgin03 = FALSE,
2810 .sg_num = 0,
2811 .cur_entry = 0,
2812 .sglun = &(data->sg_list[offset]),
2813 .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)),
2814 };
2815
2816 data->lunt[i][j] = tmp;
2817 }
2818 }
2819
2820 /*
2821 * setup target
2822 */
2823 for (i = 0; i < ARRAY_SIZE(data->target); i++) {
2824 nsp32_target *target = &(data->target[i]);
2825
2826 target->limit_entry = 0;
2827 target->sync_flag = 0;
2828 nsp32_set_async(data, target);
2829 }
2830
2831 /*
2832 * EEPROM check
2833 */
2834 ret = nsp32_getprom_param(data);
2835 if (ret == FALSE) {
2836 data->resettime = 3; /* default 3 */
2837 }
2838
2839 /*
2840 * setup HBA
2841 */
2842 nsp32hw_init(data);
2843
2844 snprintf(data->info_str, sizeof(data->info_str),
2845 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x",
2846 host->irq, host->io_port, host->n_io_port);
2847
2848 /*
2849 * SCSI bus reset
2850 *
2851 * Note: It's important to reset SCSI bus in initialization phase.
2852 * NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when
2853 * system is coming up, so SCSI devices connected to HBA is set as
2854 * un-asynchronous mode. It brings the merit that this HBA is
2855 * ready to start synchronous transfer without any preparation,
2856 * but we are difficult to control transfer speed. In addition,
2857 * it prevents device transfer speed from effecting EEPROM start-up
2858 * SDTR. NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as
2859 * Auto Mode, then FAST-10M is selected when SCSI devices are
2860 * connected same or more than 4 devices. It should be avoided
2861 * depending on this specification. Thus, resetting the SCSI bus
2862 * restores all connected SCSI devices to asynchronous mode, then
2863 * this driver set SDTR safely later, and we can control all SCSI
2864 * device transfer mode.
2865 */
2866 nsp32_do_bus_reset(data);
2867
2868 ret = request_irq(host->irq, do_nsp32_isr,
2869 SA_SHIRQ | SA_SAMPLE_RANDOM, "nsp32", data);
2870 if (ret < 0) {
2871 nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 "
2872 "SCSI PCI controller. Interrupt: %d", host->irq);
2873 goto free_sg_list;
2874 }
2875
2876 /*
2877 * PCI IO register
2878 */
2879 res = request_region(host->io_port, host->n_io_port, "nsp32");
2880 if (res == NULL) {
2881 nsp32_msg(KERN_ERR,
2882 "I/O region 0x%lx+0x%lx is already used",
2883 data->BaseAddress, data->NumAddress);
2884 goto free_irq;
2885 }
2886
2887#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
2888 scsi_add_host (host, &PCIDEV->dev);
2889 scsi_scan_host(host);
2890#endif
2891 pci_set_drvdata(PCIDEV, host);
2892 return DETECT_OK;
2893
2894 free_irq:
2895 free_irq(host->irq, data);
2896
2897 free_sg_list:
2898 pci_free_consistent(PCIDEV, NSP32_SG_TABLE_SIZE,
2899 data->sg_list, data->sg_paddr);
2900
2901 free_autoparam:
2902 pci_free_consistent(PCIDEV, sizeof(nsp32_autoparam),
2903 data->autoparam, data->auto_paddr);
2904
2905 scsi_unregister:
2906 scsi_host_put(host);
2907
2908 err:
2909 return DETECT_NG;
2910}
2911#undef DETECT_OK
2912#undef DETECT_NG
2913#undef PCIDEV
2914
2915static int nsp32_release(struct Scsi_Host *host)
2916{
2917 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
2918
2919 if (data->autoparam) {
2920 pci_free_consistent(data->Pci, sizeof(nsp32_autoparam),
2921 data->autoparam, data->auto_paddr);
2922 }
2923
2924 if (data->sg_list) {
2925 pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE,
2926 data->sg_list, data->sg_paddr);
2927 }
2928
2929 if (host->irq) {
2930 free_irq(host->irq, data);
2931 }
2932
2933 if (host->io_port && host->n_io_port) {
2934 release_region(host->io_port, host->n_io_port);
2935 }
2936
2937 if (data->MmioAddress) {
2938 iounmap(data->MmioAddress);
2939 }
2940
2941 return 0;
2942}
2943
2944static const char *nsp32_info(struct Scsi_Host *shpnt)
2945{
2946 nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata;
2947
2948 return data->info_str;
2949}
2950
2951
2952/****************************************************************************
2953 * error handler
2954 */
2955static int nsp32_eh_abort(struct scsi_cmnd *SCpnt)
2956{
2957 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2958 unsigned int base = SCpnt->device->host->io_port;
2959
2960 nsp32_msg(KERN_WARNING, "abort");
2961
2962 if (data->cur_lunt->SCpnt == NULL) {
2963 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed");
2964 return FAILED;
2965 }
2966
2967 if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) {
2968 /* reset SDTR negotiation */
2969 data->cur_target->sync_flag = 0;
2970 nsp32_set_async(data, data->cur_target);
2971 }
2972
2973 nsp32_write2(base, TRANSFER_CONTROL, 0);
2974 nsp32_write2(base, BM_CNT, 0);
2975
2976 SCpnt->result = DID_ABORT << 16;
2977 nsp32_scsi_done(SCpnt);
2978
2979 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success");
2980 return SUCCESS;
2981}
2982
2983static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt)
2984{
2985 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2986 unsigned int base = SCpnt->device->host->io_port;
2987
68b3aa7c
JG		 2988 spin_lock_irq(SCpnt->device->host->host_lock);
2989
1da177e4
LT		 2990 nsp32_msg(KERN_INFO, "Bus Reset");
2991 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
2992
2993 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
2994 nsp32_do_bus_reset(data);
2995 nsp32_write2(base, IRQ_CONTROL, 0);
2996
68b3aa7c 2997 spin_unlock_irq(SCpnt->device->host->host_lock);
1da177e4
LT		 2998 return SUCCESS; /* SCSI bus reset is succeeded at any time. */
2999}
3000
3001static void nsp32_do_bus_reset(nsp32_hw_data *data)
3002{
3003 unsigned int base = data->BaseAddress;
3004 unsigned short intrdat;
3005 int i;
3006
3007 nsp32_dbg(NSP32_DEBUG_BUSRESET, "in");
3008
3009 /*
3010 * stop all transfer
3011 * clear TRANSFERCONTROL_BM_START
3012 * clear counter
3013 */
3014 nsp32_write2(base, TRANSFER_CONTROL, 0);
3015 nsp32_write4(base, BM_CNT, 0);
3016 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
3017
3018 /*
3019 * fall back to asynchronous transfer mode
3020 * initialize SDTR negotiation flag
3021 */
3022 for (i = 0; i < ARRAY_SIZE(data->target); i++) {
3023 nsp32_target *target = &data->target[i];
3024
3025 target->sync_flag = 0;
3026 nsp32_set_async(data, target);
3027 }
3028
3029 /*
3030 * reset SCSI bus
3031 */
3032 nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST);
3033 udelay(RESET_HOLD_TIME);
3034 nsp32_write1(base, SCSI_BUS_CONTROL, 0);
3035 for(i = 0; i < 5; i++) {
3036 intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */
3037 nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat);
3038 }
3039
3040 data->CurrentSC = NULL;
3041}
3042
3043static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt)
3044{
3045 struct Scsi_Host *host = SCpnt->device->host;
3046 unsigned int base = SCpnt->device->host->io_port;
3047 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
3048
3049 nsp32_msg(KERN_INFO, "Host Reset");
3050 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
3051
df0ae249
JG		 3052 spin_lock_irq(SCpnt->device->host->host_lock);
3053
1da177e4
LT		 3054 nsp32hw_init(data);
3055 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
3056 nsp32_do_bus_reset(data);
3057 nsp32_write2(base, IRQ_CONTROL, 0);
3058
df0ae249 3059 spin_unlock_irq(SCpnt->device->host->host_lock);
1da177e4
LT		 3060 return SUCCESS; /* Host reset is succeeded at any time. */
3061}
3062
3063
3064/**************************************************************************
3065 * EEPROM handler
3066 */
3067
3068/*
3069 * getting EEPROM parameter
3070 */
3071static int nsp32_getprom_param(nsp32_hw_data *data)
3072{
3073 int vendor = data->pci_devid->vendor;
3074 int device = data->pci_devid->device;
3075 int ret, val, i;
3076
3077 /*
3078 * EEPROM checking.
3079 */
3080 ret = nsp32_prom_read(data, 0x7e);
3081 if (ret != 0x55) {
3082 nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret);
3083 return FALSE;
3084 }
3085 ret = nsp32_prom_read(data, 0x7f);
3086 if (ret != 0xaa) {
3087 nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret);
3088 return FALSE;
3089 }
3090
3091 /*
3092 * check EEPROM type
3093 */
3094 if (vendor == PCI_VENDOR_ID_WORKBIT &&
3095 device == PCI_DEVICE_ID_WORKBIT_STANDARD) {
3096 ret = nsp32_getprom_c16(data);
3097 } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
3098 device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) {
3099 ret = nsp32_getprom_at24(data);
3100 } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
3101 device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) {
3102 ret = nsp32_getprom_at24(data);
3103 } else {
3104 nsp32_msg(KERN_WARNING, "Unknown EEPROM");
3105 ret = FALSE;
3106 }
3107
3108 /* for debug : SPROM data full checking */
3109 for (i = 0; i <= 0x1f; i++) {
3110 val = nsp32_prom_read(data, i);
3111 nsp32_dbg(NSP32_DEBUG_EEPROM,
3112 "rom address 0x%x : 0x%x", i, val);
3113 }
3114
3115 return ret;
3116}
3117
3118
3119/*
3120 * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map:
3121 *
3122 * ROMADDR
3123 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6)
3124 * Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M
3125 * 0x07 : HBA Synchronous Transfer Period
3126 * Value 0: AutoSync, 1: Manual Setting
3127 * 0x08 - 0x0f : Not Used? (0x0)
3128 * 0x10 : Bus Termination
3129 * Value 0: Auto[ON], 1: ON, 2: OFF
3130 * 0x11 : Not Used? (0)
3131 * 0x12 : Bus Reset Delay Time (0x03)
3132 * 0x13 : Bootable CD Support
3133 * Value 0: Disable, 1: Enable
3134 * 0x14 : Device Scan
3135 * Bit 7 6 5 4 3 2 1 0
3136 * | <----------------->
3137 * | SCSI ID: Value 0: Skip, 1: YES
3138 * |-> Value 0: ALL scan, Value 1: Manual
3139 * 0x15 - 0x1b : Not Used? (0)
3140 * 0x1c : Constant? (0x01) (clock div?)
3141 * 0x1d - 0x7c : Not Used (0xff)
3142 * 0x7d : Not Used? (0xff)
3143 * 0x7e : Constant (0x55), Validity signature
3144 * 0x7f : Constant (0xaa), Validity signature
3145 */
3146static int nsp32_getprom_at24(nsp32_hw_data *data)
3147{
3148 int ret, i;
3149 int auto_sync;
3150 nsp32_target *target;
3151 int entry;
3152
3153 /*
3154 * Reset time which is designated by EEPROM.
3155 *
3156 * TODO: Not used yet.
3157 */
3158 data->resettime = nsp32_prom_read(data, 0x12);
3159
3160 /*
3161 * HBA Synchronous Transfer Period
3162 *
3163 * Note: auto_sync = 0: auto, 1: manual. Ninja SCSI HBA spec says
3164 * that if auto_sync is 0 (auto), and connected SCSI devices are
3165 * same or lower than 3, then transfer speed is set as ULTRA-20M.
3166 * On the contrary if connected SCSI devices are same or higher
3167 * than 4, then transfer speed is set as FAST-10M.
3168 *
3169 * I break this rule. The number of connected SCSI devices are
3170 * only ignored. If auto_sync is 0 (auto), then transfer speed is
3171 * forced as ULTRA-20M.
3172 */
3173 ret = nsp32_prom_read(data, 0x07);
3174 switch (ret) {
3175 case 0:
3176 auto_sync = TRUE;
3177 break;
3178 case 1:
3179 auto_sync = FALSE;
3180 break;
3181 default:
3182 nsp32_msg(KERN_WARNING,
3183 "Unsupported Auto Sync mode. Fall back to manual mode.");
3184 auto_sync = TRUE;
3185 }
3186
3187 if (trans_mode == ULTRA20M_MODE) {
3188 auto_sync = TRUE;
3189 }
3190
3191 /*
3192 * each device Synchronous Transfer Period
3193 */
3194 for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3195 target = &data->target[i];
3196 if (auto_sync == TRUE) {
3197 target->limit_entry = 0; /* set as ULTRA20M */
3198 } else {
3199 ret = nsp32_prom_read(data, i);
3200 entry = nsp32_search_period_entry(data, target, ret);
3201 if (entry < 0) {
3202 /* search failed... set maximum speed */
3203 entry = 0;
3204 }
3205 target->limit_entry = entry;
3206 }
3207 }
3208
3209 return TRUE;
3210}
3211
3212
3213/*
3214 * C16 110 (I-O Data: SC-NBD) data map:
3215 *
3216 * ROMADDR
3217 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6)
3218 * Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC
3219 * 0x07 : 0 (HBA Synchronous Transfer Period: Auto Sync)
3220 * 0x08 - 0x0f : Not Used? (0x0)
3221 * 0x10 : Transfer Mode
3222 * Value 0: PIO, 1: Busmater
3223 * 0x11 : Bus Reset Delay Time (0x00-0x20)
3224 * 0x12 : Bus Termination
3225 * Value 0: Disable, 1: Enable
3226 * 0x13 - 0x19 : Disconnection
3227 * Value 0: Disable, 1: Enable
3228 * 0x1a - 0x7c : Not Used? (0)
3229 * 0x7d : Not Used? (0xf8)
3230 * 0x7e : Constant (0x55), Validity signature
3231 * 0x7f : Constant (0xaa), Validity signature
3232 */
3233static int nsp32_getprom_c16(nsp32_hw_data *data)
3234{
3235 int ret, i;
3236 nsp32_target *target;
3237 int entry, val;
3238
3239 /*
3240 * Reset time which is designated by EEPROM.
3241 *
3242 * TODO: Not used yet.
3243 */
3244 data->resettime = nsp32_prom_read(data, 0x11);
3245
3246 /*
3247 * each device Synchronous Transfer Period
3248 */
3249 for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3250 target = &data->target[i];
3251 ret = nsp32_prom_read(data, i);
3252 switch (ret) {
3253 case 0: /* 20MB/s */
3254 val = 0x0c;
3255 break;
3256 case 1: /* 10MB/s */
3257 val = 0x19;
3258 break;
3259 case 2: /* 5MB/s */
3260 val = 0x32;
3261 break;
3262 case 3: /* ASYNC */
3263 val = 0x00;
3264 break;
3265 default: /* default 20MB/s */
3266 val = 0x0c;
3267 break;
3268 }
3269 entry = nsp32_search_period_entry(data, target, val);
3270 if (entry < 0 || trans_mode == ULTRA20M_MODE) {
3271 /* search failed... set maximum speed */
3272 entry = 0;
3273 }
3274 target->limit_entry = entry;
3275 }
3276
3277 return TRUE;
3278}
3279
3280
3281/*
3282 * Atmel AT24C01A (drived in 5V) serial EEPROM routines
3283 */
3284static int nsp32_prom_read(nsp32_hw_data *data, int romaddr)
3285{
3286 int i, val;
3287
3288 /* start condition */
3289 nsp32_prom_start(data);
3290
3291 /* device address */
3292 nsp32_prom_write_bit(data, 1); /* 1 */
3293 nsp32_prom_write_bit(data, 0); /* 0 */
3294 nsp32_prom_write_bit(data, 1); /* 1 */
3295 nsp32_prom_write_bit(data, 0); /* 0 */
3296 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */
3297 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */
3298 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */
3299
3300 /* R/W: W for dummy write */
3301 nsp32_prom_write_bit(data, 0);
3302
3303 /* ack */
3304 nsp32_prom_write_bit(data, 0);
3305
3306 /* word address */
3307 for (i = 7; i >= 0; i--) {
3308 nsp32_prom_write_bit(data, ((romaddr >> i) & 1));
3309 }
3310
3311 /* ack */
3312 nsp32_prom_write_bit(data, 0);
3313
3314 /* start condition */
3315 nsp32_prom_start(data);
3316
3317 /* device address */
3318 nsp32_prom_write_bit(data, 1); /* 1 */
3319 nsp32_prom_write_bit(data, 0); /* 0 */
3320 nsp32_prom_write_bit(data, 1); /* 1 */
3321 nsp32_prom_write_bit(data, 0); /* 0 */
3322 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */
3323 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */
3324 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */
3325
3326 /* R/W: R */
3327 nsp32_prom_write_bit(data, 1);
3328
3329 /* ack */
3330 nsp32_prom_write_bit(data, 0);
3331
3332 /* data... */
3333 val = 0;
3334 for (i = 7; i >= 0; i--) {
3335 val += (nsp32_prom_read_bit(data) << i);
3336 }
3337
3338 /* no ack */
3339 nsp32_prom_write_bit(data, 1);
3340
3341 /* stop condition */
3342 nsp32_prom_stop(data);
3343
3344 return val;
3345}
3346
3347static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val)
3348{
3349 int base = data->BaseAddress;
3350 int tmp;
3351
3352 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL);
3353
3354 if (val == 0) {
3355 tmp &= ~bit;
3356 } else {
3357 tmp |= bit;
3358 }
3359
3360 nsp32_index_write1(base, SERIAL_ROM_CTL, tmp);
3361
3362 udelay(10);
3363}
3364
3365static int nsp32_prom_get(nsp32_hw_data *data, int bit)
3366{
3367 int base = data->BaseAddress;
3368 int tmp, ret;
3369
3370 if (bit != SDA) {
3371 nsp32_msg(KERN_ERR, "return value is not appropriate");
3372 return 0;
3373 }
3374
3375
3376 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit;
3377
3378 if (tmp == 0) {
3379 ret = 0;
3380 } else {
3381 ret = 1;
3382 }
3383
3384 udelay(10);
3385
3386 return ret;
3387}
3388
3389static void nsp32_prom_start (nsp32_hw_data *data)
3390{
3391 /* start condition */
3392 nsp32_prom_set(data, SCL, 1);
3393 nsp32_prom_set(data, SDA, 1);
3394 nsp32_prom_set(data, ENA, 1); /* output mode */
3395 nsp32_prom_set(data, SDA, 0); /* keeping SCL=1 and transiting
3396 * SDA 1->0 is start condition */
3397 nsp32_prom_set(data, SCL, 0);
3398}
3399
3400static void nsp32_prom_stop (nsp32_hw_data *data)
3401{
3402 /* stop condition */
3403 nsp32_prom_set(data, SCL, 1);
3404 nsp32_prom_set(data, SDA, 0);
3405 nsp32_prom_set(data, ENA, 1); /* output mode */
3406 nsp32_prom_set(data, SDA, 1);
3407 nsp32_prom_set(data, SCL, 0);
3408}
3409
3410static void nsp32_prom_write_bit(nsp32_hw_data *data, int val)
3411{
3412 /* write */
3413 nsp32_prom_set(data, SDA, val);
3414 nsp32_prom_set(data, SCL, 1 );
3415 nsp32_prom_set(data, SCL, 0 );
3416}
3417
3418static int nsp32_prom_read_bit(nsp32_hw_data *data)
3419{
3420 int val;
3421
3422 /* read */
3423 nsp32_prom_set(data, ENA, 0); /* input mode */
3424 nsp32_prom_set(data, SCL, 1);
3425
3426 val = nsp32_prom_get(data, SDA);
3427
3428 nsp32_prom_set(data, SCL, 0);
3429 nsp32_prom_set(data, ENA, 1); /* output mode */
3430
3431 return val;
3432}
3433
3434
3435/**************************************************************************
3436 * Power Management
3437 */
3438#ifdef CONFIG_PM
3439
3440/* Device suspended */
e5378ca8 3441static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state)
1da177e4
LT		 3442{
3443 struct Scsi_Host *host = pci_get_drvdata(pdev);
3444
3445 nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host);
3446
3447 pci_save_state (pdev);
3448 pci_disable_device (pdev);
e5378ca8 3449 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1da177e4
LT		 3450
3451 return 0;
3452}
3453
3454/* Device woken up */
3455static int nsp32_resume(struct pci_dev *pdev)
3456{
3457 struct Scsi_Host *host = pci_get_drvdata(pdev);
3458 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
3459 unsigned short reg;
3460
3461 nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host);
3462
e5378ca8
PM		 3463 pci_set_power_state(pdev, PCI_D0);
3464 pci_enable_wake (pdev, PCI_D0, 0);
1da177e4
LT		 3465 pci_restore_state (pdev);
3466
3467 reg = nsp32_read2(data->BaseAddress, INDEX_REG);
3468
3469 nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg);
3470
3471 if (reg == 0xffff) {
3472 nsp32_msg(KERN_INFO, "missing device. abort resume.");
3473 return 0;
3474 }
3475
3476 nsp32hw_init (data);
3477 nsp32_do_bus_reset(data);
3478
3479 nsp32_msg(KERN_INFO, "resume success");
3480
3481 return 0;
3482}
3483
3484/* Enable wake event */
e5378ca8 3485static int nsp32_enable_wake(struct pci_dev *pdev, pci_power_t state, int enable)
1da177e4
LT		 3486{
3487 struct Scsi_Host *host = pci_get_drvdata(pdev);
3488
3489 nsp32_msg(KERN_INFO, "pci-enable_wake: stub, pdev=0x%p, enable=%d, slot=%s, host=0x%p", pdev, enable, pci_name(pdev), host);
3490
3491 return 0;
3492}
3493#endif
3494
3495/************************************************************************
3496 * PCI/Cardbus probe/remove routine
3497 */
3498static int __devinit nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3499{
3500 int ret;
3501 nsp32_hw_data *data = &nsp32_data_base;
3502
3503 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
3504
3505 ret = pci_enable_device(pdev);
3506 if (ret) {
3507 nsp32_msg(KERN_ERR, "failed to enable pci device");
3508 return ret;
3509 }
3510
3511 data->Pci = pdev;
3512 data->pci_devid = id;
3513 data->IrqNumber = pdev->irq;
3514 data->BaseAddress = pci_resource_start(pdev, 0);
3515 data->NumAddress = pci_resource_len (pdev, 0);
3516 data->MmioAddress = ioremap_nocache(pci_resource_start(pdev, 1),
3517 pci_resource_len (pdev, 1));
3518 data->MmioLength = pci_resource_len (pdev, 1);
3519
3520 pci_set_master(pdev);
3521
3522#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
3523 ret = nsp32_detect(pdev);
3524#else
3525 ret = scsi_register_host(&nsp32_template);
3526#endif
3527
3528 nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s",
3529 pdev->irq,
3530 data->MmioAddress, data->MmioLength,
3531 pci_name(pdev),
3532 nsp32_model[id->driver_data]);
3533
3534 nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret);
3535
3536 return ret;
3537}
3538
3539static void __devexit nsp32_remove(struct pci_dev *pdev)
3540{
3541#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
3542 struct Scsi_Host *host = pci_get_drvdata(pdev);
3543#endif
3544
3545 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
3546
3547#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,73))
3548 scsi_remove_host(host);
3549
3550 nsp32_release(host);
3551
3552 scsi_host_put(host);
3553#else
3554 scsi_unregister_host(&nsp32_template);
3555#endif
3556}
3557
3558
3559
3560static struct pci_driver nsp32_driver = {
3561 .name = "nsp32",
3562 .id_table = nsp32_pci_table,
3563 .probe = nsp32_probe,
3564 .remove = __devexit_p(nsp32_remove),
3565#ifdef CONFIG_PM
3566 .suspend = nsp32_suspend,
3567 .resume = nsp32_resume,
3568 .enable_wake = nsp32_enable_wake,
3569#endif
3570};
3571
3572/*********************************************************************
3573 * Moule entry point
3574 */
3575static int __init init_nsp32(void) {
3576 nsp32_msg(KERN_INFO, "loading...");
3577 return pci_module_init(&nsp32_driver);
3578}
3579
3580static void __exit exit_nsp32(void) {
3581 nsp32_msg(KERN_INFO, "unloading...");
3582 pci_unregister_driver(&nsp32_driver);
3583}
3584
3585module_init(init_nsp32);
3586module_exit(exit_nsp32);
3587
3588/* end */
Linux kernel - Deliverables
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