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[mirror_ubuntu-artful-kernel.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
1da177e4
LT		 26#include <linux/module.h>
27#include <linux/init.h>
28#include <linux/kernel.h>
1da177e4
LT		 29#include <linux/string.h>
30#include <linux/timer.h>
31#include <linux/ioport.h>
32#include <linux/major.h>
33#include <linux/blkdev.h>
34#include <linux/interrupt.h>
35#include <linux/pci.h>
36#include <linux/delay.h>
37#include <linux/ctype.h>
910638ae 38#include <linux/dma-mapping.h>
1da177e4
LT		 39
40#include <asm/dma.h>
41#include <asm/system.h>
42#include <asm/io.h>
43
44#include <scsi/scsi.h>
45#include <scsi/scsi_cmnd.h>
46#include <scsi/scsi_device.h>
47#include <scsi/scsi_host.h>
48#include <scsi/scsi_ioctl.h>
49
1da177e4
LT		 50#include "nsp32.h"
51
52
53/***********************************************************************
54 * Module parameters
55 */
56static int trans_mode = 0; /* default: BIOS */
57module_param (trans_mode, int, 0);
58MODULE_PARM_DESC(trans_mode, "transfer mode (0: BIOS(default) 1: Async 2: Ultra20M");
59#define ASYNC_MODE 1
60#define ULTRA20M_MODE 2
61
62static int auto_param = 0; /* default: ON */
63module_param (auto_param, bool, 0);
64MODULE_PARM_DESC(auto_param, "AutoParameter mode (0: ON(default) 1: OFF)");
65
66static int disc_priv = 1; /* default: OFF */
67module_param (disc_priv, bool, 0);
68MODULE_PARM_DESC(disc_priv, "disconnection privilege mode (0: ON 1: OFF(default))");
69
70MODULE_AUTHOR("YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>, GOTO Masanori <gotom@debian.or.jp>");
71MODULE_DESCRIPTION("Workbit NinjaSCSI-32Bi/UDE CardBus/PCI SCSI host bus adapter module");
72MODULE_LICENSE("GPL");
73
74static const char *nsp32_release_version = "1.2";
75
76
77/****************************************************************************
78 * Supported hardware
79 */
80static struct pci_device_id nsp32_pci_table[] __devinitdata = {
81 {
82 .vendor = PCI_VENDOR_ID_IODATA,
83 .device = PCI_DEVICE_ID_NINJASCSI_32BI_CBSC_II,
84 .subvendor = PCI_ANY_ID,
85 .subdevice = PCI_ANY_ID,
86 .driver_data = MODEL_IODATA,
87 },
88 {
89 .vendor = PCI_VENDOR_ID_WORKBIT,
90 .device = PCI_DEVICE_ID_NINJASCSI_32BI_KME,
91 .subvendor = PCI_ANY_ID,
92 .subdevice = PCI_ANY_ID,
93 .driver_data = MODEL_KME,
94 },
95 {
96 .vendor = PCI_VENDOR_ID_WORKBIT,
97 .device = PCI_DEVICE_ID_NINJASCSI_32BI_WBT,
98 .subvendor = PCI_ANY_ID,
99 .subdevice = PCI_ANY_ID,
100 .driver_data = MODEL_WORKBIT,
101 },
102 {
103 .vendor = PCI_VENDOR_ID_WORKBIT,
104 .device = PCI_DEVICE_ID_WORKBIT_STANDARD,
105 .subvendor = PCI_ANY_ID,
106 .subdevice = PCI_ANY_ID,
107 .driver_data = MODEL_PCI_WORKBIT,
108 },
109 {
110 .vendor = PCI_VENDOR_ID_WORKBIT,
111 .device = PCI_DEVICE_ID_NINJASCSI_32BI_LOGITEC,
112 .subvendor = PCI_ANY_ID,
113 .subdevice = PCI_ANY_ID,
114 .driver_data = MODEL_LOGITEC,
115 },
116 {
117 .vendor = PCI_VENDOR_ID_WORKBIT,
118 .device = PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC,
119 .subvendor = PCI_ANY_ID,
120 .subdevice = PCI_ANY_ID,
121 .driver_data = MODEL_PCI_LOGITEC,
122 },
123 {
124 .vendor = PCI_VENDOR_ID_WORKBIT,
125 .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO,
126 .subvendor = PCI_ANY_ID,
127 .subdevice = PCI_ANY_ID,
128 .driver_data = MODEL_PCI_MELCO,
129 },
130 {
131 .vendor = PCI_VENDOR_ID_WORKBIT,
132 .device = PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO_II,
133 .subvendor = PCI_ANY_ID,
134 .subdevice = PCI_ANY_ID,
135 .driver_data = MODEL_PCI_MELCO,
136 },
137 {0,0,},
138};
139MODULE_DEVICE_TABLE(pci, nsp32_pci_table);
140
141static nsp32_hw_data nsp32_data_base; /* probe <-> detect glue */
142
143
144/*
145 * Period/AckWidth speed conversion table
146 *
147 * Note: This period/ackwidth speed table must be in descending order.
148 */
149static nsp32_sync_table nsp32_sync_table_40M[] = {
150 /* {PNo, AW, SP, EP, SREQ smpl} Speed(MB/s) Period AckWidth */
151 {0x1, 0, 0x0c, 0x0c, SMPL_40M}, /* 20.0 : 50ns, 25ns */
152 {0x2, 0, 0x0d, 0x18, SMPL_40M}, /* 13.3 : 75ns, 25ns */
153 {0x3, 1, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */
154 {0x4, 1, 0x1a, 0x1f, SMPL_20M}, /* 8.0 : 125ns, 50ns */
155 {0x5, 2, 0x20, 0x25, SMPL_20M}, /* 6.7 : 150ns, 75ns */
156 {0x6, 2, 0x26, 0x31, SMPL_20M}, /* 5.7 : 175ns, 75ns */
157 {0x7, 3, 0x32, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */
158 {0x8, 3, 0x33, 0x38, SMPL_10M}, /* 4.4 : 225ns, 100ns */
159 {0x9, 3, 0x39, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */
160};
161
162static nsp32_sync_table nsp32_sync_table_20M[] = {
163 {0x1, 0, 0x19, 0x19, SMPL_40M}, /* 10.0 : 100ns, 50ns */
164 {0x2, 0, 0x1a, 0x25, SMPL_20M}, /* 6.7 : 150ns, 50ns */
165 {0x3, 1, 0x26, 0x32, SMPL_20M}, /* 5.0 : 200ns, 100ns */
166 {0x4, 1, 0x33, 0x3e, SMPL_10M}, /* 4.0 : 250ns, 100ns */
167 {0x5, 2, 0x3f, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 150ns */
168 {0x6, 2, 0x4c, 0x57, SMPL_10M}, /* 2.8 : 350ns, 150ns */
169 {0x7, 3, 0x58, 0x64, SMPL_10M}, /* 2.5 : 400ns, 200ns */
170 {0x8, 3, 0x65, 0x70, SMPL_10M}, /* 2.2 : 450ns, 200ns */
171 {0x9, 3, 0x71, 0x7d, SMPL_10M}, /* 2.0 : 500ns, 200ns */
172};
173
174static nsp32_sync_table nsp32_sync_table_pci[] = {
175 {0x1, 0, 0x0c, 0x0f, SMPL_40M}, /* 16.6 : 60ns, 30ns */
176 {0x2, 0, 0x10, 0x16, SMPL_40M}, /* 11.1 : 90ns, 30ns */
177 {0x3, 1, 0x17, 0x1e, SMPL_20M}, /* 8.3 : 120ns, 60ns */
178 {0x4, 1, 0x1f, 0x25, SMPL_20M}, /* 6.7 : 150ns, 60ns */
179 {0x5, 2, 0x26, 0x2d, SMPL_20M}, /* 5.6 : 180ns, 90ns */
180 {0x6, 2, 0x2e, 0x34, SMPL_10M}, /* 4.8 : 210ns, 90ns */
181 {0x7, 3, 0x35, 0x3c, SMPL_10M}, /* 4.2 : 240ns, 120ns */
182 {0x8, 3, 0x3d, 0x43, SMPL_10M}, /* 3.7 : 270ns, 120ns */
183 {0x9, 3, 0x44, 0x4b, SMPL_10M}, /* 3.3 : 300ns, 120ns */
184};
185
186/*
187 * function declaration
188 */
189/* module entry point */
190static int __devinit nsp32_probe (struct pci_dev *, const struct pci_device_id *);
191static void __devexit nsp32_remove(struct pci_dev *);
192static int __init init_nsp32 (void);
193static void __exit exit_nsp32 (void);
194
d0be4a7d 195/* struct struct scsi_host_template */
1da177e4 196static int nsp32_proc_info (struct Scsi_Host *, char *, char **, off_t, int, int);
1da177e4 197
1da177e4 198static int nsp32_detect (struct pci_dev *pdev);
1da177e4
LT		 199static int nsp32_queuecommand(struct scsi_cmnd *,
200 void (*done)(struct scsi_cmnd *));
201static const char *nsp32_info (struct Scsi_Host *);
202static int nsp32_release (struct Scsi_Host *);
203
204/* SCSI error handler */
205static int nsp32_eh_abort (struct scsi_cmnd *);
206static int nsp32_eh_bus_reset (struct scsi_cmnd *);
207static int nsp32_eh_host_reset(struct scsi_cmnd *);
208
209/* generate SCSI message */
210static void nsp32_build_identify(struct scsi_cmnd *);
211static void nsp32_build_nop (struct scsi_cmnd *);
212static void nsp32_build_reject (struct scsi_cmnd *);
213static void nsp32_build_sdtr (struct scsi_cmnd *, unsigned char, unsigned char);
214
215/* SCSI message handler */
216static int nsp32_busfree_occur(struct scsi_cmnd *, unsigned short);
217static void nsp32_msgout_occur (struct scsi_cmnd *);
218static void nsp32_msgin_occur (struct scsi_cmnd *, unsigned long, unsigned short);
219
220static int nsp32_setup_sg_table (struct scsi_cmnd *);
221static int nsp32_selection_autopara(struct scsi_cmnd *);
222static int nsp32_selection_autoscsi(struct scsi_cmnd *);
223static void nsp32_scsi_done (struct scsi_cmnd *);
224static int nsp32_arbitration (struct scsi_cmnd *, unsigned int);
225static int nsp32_reselection (struct scsi_cmnd *, unsigned char);
226static void nsp32_adjust_busfree (struct scsi_cmnd *, unsigned int);
227static void nsp32_restart_autoscsi (struct scsi_cmnd *, unsigned short);
228
229/* SCSI SDTR */
230static void nsp32_analyze_sdtr (struct scsi_cmnd *);
231static int nsp32_search_period_entry(nsp32_hw_data *, nsp32_target *, unsigned char);
232static void nsp32_set_async (nsp32_hw_data *, nsp32_target *);
233static void nsp32_set_max_sync (nsp32_hw_data *, nsp32_target *, unsigned char *, unsigned char *);
234static void nsp32_set_sync_entry (nsp32_hw_data *, nsp32_target *, int, unsigned char);
235
236/* SCSI bus status handler */
237static void nsp32_wait_req (nsp32_hw_data *, int);
238static void nsp32_wait_sack (nsp32_hw_data *, int);
239static void nsp32_sack_assert (nsp32_hw_data *);
240static void nsp32_sack_negate (nsp32_hw_data *);
241static void nsp32_do_bus_reset(nsp32_hw_data *);
242
243/* hardware interrupt handler */
7d12e780 244static irqreturn_t do_nsp32_isr(int, void *);
1da177e4
LT		 245
246/* initialize hardware */
247static int nsp32hw_init(nsp32_hw_data *);
248
249/* EEPROM handler */
250static int nsp32_getprom_param (nsp32_hw_data *);
251static int nsp32_getprom_at24 (nsp32_hw_data *);
252static int nsp32_getprom_c16 (nsp32_hw_data *);
253static void nsp32_prom_start (nsp32_hw_data *);
254static void nsp32_prom_stop (nsp32_hw_data *);
255static int nsp32_prom_read (nsp32_hw_data *, int);
256static int nsp32_prom_read_bit (nsp32_hw_data *);
257static void nsp32_prom_write_bit(nsp32_hw_data *, int);
258static void nsp32_prom_set (nsp32_hw_data *, int, int);
259static int nsp32_prom_get (nsp32_hw_data *, int);
260
261/* debug/warning/info message */
262static void nsp32_message (const char *, int, char *, char *, ...);
263#ifdef NSP32_DEBUG
264static void nsp32_dmessage(const char *, int, int, char *, ...);
265#endif
266
267/*
268 * max_sectors is currently limited up to 128.
269 */
270static struct scsi_host_template nsp32_template = {
271 .proc_name = "nsp32",
272 .name = "Workbit NinjaSCSI-32Bi/UDE",
273 .proc_info = nsp32_proc_info,
274 .info = nsp32_info,
275 .queuecommand = nsp32_queuecommand,
276 .can_queue = 1,
277 .sg_tablesize = NSP32_SG_SIZE,
278 .max_sectors = 128,
279 .cmd_per_lun = 1,
280 .this_id = NSP32_HOST_SCSIID,
281 .use_clustering = DISABLE_CLUSTERING,
282 .eh_abort_handler = nsp32_eh_abort,
1da177e4
LT		 283 .eh_bus_reset_handler = nsp32_eh_bus_reset,
284 .eh_host_reset_handler = nsp32_eh_host_reset,
1da177e4 285/* .highmem_io = 1, */
1da177e4
LT		 286};
287
288#include "nsp32_io.h"
289
290/***********************************************************************
291 * debug, error print
292 */
293#ifndef NSP32_DEBUG
294# define NSP32_DEBUG_MASK 0x000000
295# define nsp32_msg(type, args...) nsp32_message ("", 0, (type), args)
296# define nsp32_dbg(mask, args...) /* */
297#else
298# define NSP32_DEBUG_MASK 0xffffff
299# define nsp32_msg(type, args...) \
cadbd4a5 300 nsp32_message (__func__, __LINE__, (type), args)
1da177e4 301# define nsp32_dbg(mask, args...) \
cadbd4a5 302 nsp32_dmessage(__func__, __LINE__, (mask), args)
1da177e4
LT		 303#endif
304
305#define NSP32_DEBUG_QUEUECOMMAND BIT(0)
306#define NSP32_DEBUG_REGISTER BIT(1)
307#define NSP32_DEBUG_AUTOSCSI BIT(2)
308#define NSP32_DEBUG_INTR BIT(3)
309#define NSP32_DEBUG_SGLIST BIT(4)
310#define NSP32_DEBUG_BUSFREE BIT(5)
311#define NSP32_DEBUG_CDB_CONTENTS BIT(6)
312#define NSP32_DEBUG_RESELECTION BIT(7)
313#define NSP32_DEBUG_MSGINOCCUR BIT(8)
314#define NSP32_DEBUG_EEPROM BIT(9)
315#define NSP32_DEBUG_MSGOUTOCCUR BIT(10)
316#define NSP32_DEBUG_BUSRESET BIT(11)
317#define NSP32_DEBUG_RESTART BIT(12)
318#define NSP32_DEBUG_SYNC BIT(13)
319#define NSP32_DEBUG_WAIT BIT(14)
320#define NSP32_DEBUG_TARGETFLAG BIT(15)
321#define NSP32_DEBUG_PROC BIT(16)
322#define NSP32_DEBUG_INIT BIT(17)
323#define NSP32_SPECIAL_PRINT_REGISTER BIT(20)
324
325#define NSP32_DEBUG_BUF_LEN 100
326
327static void nsp32_message(const char *func, int line, char *type, char *fmt, ...)
328{
329 va_list args;
330 char buf[NSP32_DEBUG_BUF_LEN];
331
332 va_start(args, fmt);
333 vsnprintf(buf, sizeof(buf), fmt, args);
334 va_end(args);
335
336#ifndef NSP32_DEBUG
337 printk("%snsp32: %s\n", type, buf);
338#else
339 printk("%snsp32: %s (%d): %s\n", type, func, line, buf);
340#endif
341}
342
343#ifdef NSP32_DEBUG
344static void nsp32_dmessage(const char *func, int line, int mask, char *fmt, ...)
345{
346 va_list args;
347 char buf[NSP32_DEBUG_BUF_LEN];
348
349 va_start(args, fmt);
350 vsnprintf(buf, sizeof(buf), fmt, args);
351 va_end(args);
352
353 if (mask & NSP32_DEBUG_MASK) {
354 printk("nsp32-debug: 0x%x %s (%d): %s\n", mask, func, line, buf);
355 }
356}
357#endif
358
359#ifdef NSP32_DEBUG
360# include "nsp32_debug.c"
361#else
362# define show_command(arg) /* */
363# define show_busphase(arg) /* */
364# define show_autophase(arg) /* */
365#endif
366
367/*
368 * IDENTIFY Message
369 */
370static void nsp32_build_identify(struct scsi_cmnd *SCpnt)
371{
372 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
373 int pos = data->msgout_len;
374 int mode = FALSE;
375
376 /* XXX: Auto DiscPriv detection is progressing... */
377 if (disc_priv == 0) {
378 /* mode = TRUE; */
379 }
380
381 data->msgoutbuf[pos] = IDENTIFY(mode, SCpnt->device->lun); pos++;
382
383 data->msgout_len = pos;
384}
385
386/*
387 * SDTR Message Routine
388 */
389static void nsp32_build_sdtr(struct scsi_cmnd *SCpnt,
390 unsigned char period,
391 unsigned char offset)
392{
393 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
394 int pos = data->msgout_len;
395
396 data->msgoutbuf[pos] = EXTENDED_MESSAGE; pos++;
397 data->msgoutbuf[pos] = EXTENDED_SDTR_LEN; pos++;
398 data->msgoutbuf[pos] = EXTENDED_SDTR; pos++;
399 data->msgoutbuf[pos] = period; pos++;
400 data->msgoutbuf[pos] = offset; pos++;
401
402 data->msgout_len = pos;
403}
404
405/*
406 * No Operation Message
407 */
408static void nsp32_build_nop(struct scsi_cmnd *SCpnt)
409{
410 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
411 int pos = data->msgout_len;
412
413 if (pos != 0) {
414 nsp32_msg(KERN_WARNING,
415 "Some messages are already contained!");
416 return;
417 }
418
419 data->msgoutbuf[pos] = NOP; pos++;
420 data->msgout_len = pos;
421}
422
423/*
424 * Reject Message
425 */
426static void nsp32_build_reject(struct scsi_cmnd *SCpnt)
427{
428 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
429 int pos = data->msgout_len;
430
431 data->msgoutbuf[pos] = MESSAGE_REJECT; pos++;
432 data->msgout_len = pos;
433}
434
435/*
436 * timer
437 */
438#if 0
439static void nsp32_start_timer(struct scsi_cmnd *SCpnt, int time)
440{
441 unsigned int base = SCpnt->host->io_port;
442
443 nsp32_dbg(NSP32_DEBUG_INTR, "timer=%d", time);
444
445 if (time & (~TIMER_CNT_MASK)) {
446 nsp32_dbg(NSP32_DEBUG_INTR, "timer set overflow");
447 }
448
449 nsp32_write2(base, TIMER_SET, time & TIMER_CNT_MASK);
450}
451#endif
452
453
454/*
455 * set SCSI command and other parameter to asic, and start selection phase
456 */
457static int nsp32_selection_autopara(struct scsi_cmnd *SCpnt)
458{
459 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
460 unsigned int base = SCpnt->device->host->io_port;
461 unsigned int host_id = SCpnt->device->host->this_id;
422c0d61 462 unsigned char target = scmd_id(SCpnt);
1da177e4
LT		 463 nsp32_autoparam *param = data->autoparam;
464 unsigned char phase;
465 int i, ret;
466 unsigned int msgout;
467 u16_le s;
468
469 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
470
471 /*
472 * check bus free
473 */
474 phase = nsp32_read1(base, SCSI_BUS_MONITOR);
475 if (phase != BUSMON_BUS_FREE) {
476 nsp32_msg(KERN_WARNING, "bus busy");
477 show_busphase(phase & BUSMON_PHASE_MASK);
478 SCpnt->result = DID_BUS_BUSY << 16;
479 return FALSE;
480 }
481
482 /*
483 * message out
484 *
485 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
486 * over 3 messages needs another routine.
487 */
488 if (data->msgout_len == 0) {
489 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
490 SCpnt->result = DID_ERROR << 16;
491 return FALSE;
492 } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
493 msgout = 0;
494 for (i = 0; i < data->msgout_len; i++) {
495 /*
496 * the sending order of the message is:
497 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2
498 * MCNT 2: MSG#1 -> MSG#2
499 * MCNT 1: MSG#2
500 */
501 msgout >>= 8;
502 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
503 }
504 msgout |= MV_VALID; /* MV valid */
505 msgout |= (unsigned int)data->msgout_len; /* len */
506 } else {
507 /* data->msgout_len > 3 */
508 msgout = 0;
509 }
510
511 // nsp_dbg(NSP32_DEBUG_AUTOSCSI, "sel time out=0x%x\n", nsp32_read2(base, SEL_TIME_OUT));
512 // nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
513
514 /*
515 * setup asic parameter
516 */
517 memset(param, 0, sizeof(nsp32_autoparam));
518
519 /* cdb */
520 for (i = 0; i < SCpnt->cmd_len; i++) {
521 param->cdb[4 * i] = SCpnt->cmnd[i];
522 }
523
524 /* outgoing messages */
525 param->msgout = cpu_to_le32(msgout);
526
527 /* syncreg, ackwidth, target id, SREQ sampling rate */
528 param->syncreg = data->cur_target->syncreg;
529 param->ackwidth = data->cur_target->ackwidth;
530 param->target_id = BIT(host_id) | BIT(target);
531 param->sample_reg = data->cur_target->sample_reg;
532
533 // nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "sample rate=0x%x\n", data->cur_target->sample_reg);
534
535 /* command control */
536 param->command_control = cpu_to_le16(CLEAR_CDB_FIFO_POINTER |
537 AUTOSCSI_START |
538 AUTO_MSGIN_00_OR_04 |
539 AUTO_MSGIN_02 |
540 AUTO_ATN );
541
542
543 /* transfer control */
544 s = 0;
545 switch (data->trans_method) {
546 case NSP32_TRANSFER_BUSMASTER:
547 s |= BM_START;
548 break;
549 case NSP32_TRANSFER_MMIO:
550 s |= CB_MMIO_MODE;
551 break;
552 case NSP32_TRANSFER_PIO:
553 s |= CB_IO_MODE;
554 break;
555 default:
556 nsp32_msg(KERN_ERR, "unknown trans_method");
557 break;
558 }
559 /*
560 * OR-ed BLIEND_MODE, FIFO intr is decreased, instead of PCI bus waits.
561 * For bus master transfer, it's taken off.
562 */
563 s |= (TRANSFER_GO | ALL_COUNTER_CLR);
564 param->transfer_control = cpu_to_le16(s);
565
566 /* sg table addr */
567 param->sgt_pointer = cpu_to_le32(data->cur_lunt->sglun_paddr);
568
569 /*
570 * transfer parameter to ASIC
571 */
572 nsp32_write4(base, SGT_ADR, data->auto_paddr);
573 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER |
574 AUTO_PARAMETER );
575
576 /*
577 * Check arbitration
578 */
579 ret = nsp32_arbitration(SCpnt, base);
580
581 return ret;
582}
583
584
585/*
586 * Selection with AUTO SCSI (without AUTO PARAMETER)
587 */
588static int nsp32_selection_autoscsi(struct scsi_cmnd *SCpnt)
589{
590 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
591 unsigned int base = SCpnt->device->host->io_port;
592 unsigned int host_id = SCpnt->device->host->this_id;
422c0d61 593 unsigned char target = scmd_id(SCpnt);
1da177e4
LT		 594 unsigned char phase;
595 int status;
596 unsigned short command = 0;
597 unsigned int msgout = 0;
598 unsigned short execph;
599 int i;
600
601 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "in");
602
603 /*
604 * IRQ disable
605 */
606 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
607
608 /*
609 * check bus line
610 */
611 phase = nsp32_read1(base, SCSI_BUS_MONITOR);
612 if(((phase & BUSMON_BSY) == 1) || (phase & BUSMON_SEL) == 1) {
613 nsp32_msg(KERN_WARNING, "bus busy");
614 SCpnt->result = DID_BUS_BUSY << 16;
615 status = 1;
616 goto out;
617 }
618
619 /*
620 * clear execph
621 */
622 execph = nsp32_read2(base, SCSI_EXECUTE_PHASE);
623
624 /*
625 * clear FIFO counter to set CDBs
626 */
627 nsp32_write2(base, COMMAND_CONTROL, CLEAR_CDB_FIFO_POINTER);
628
629 /*
630 * set CDB0 - CDB15
631 */
632 for (i = 0; i < SCpnt->cmd_len; i++) {
633 nsp32_write1(base, COMMAND_DATA, SCpnt->cmnd[i]);
634 }
635 nsp32_dbg(NSP32_DEBUG_CDB_CONTENTS, "CDB[0]=[0x%x]", SCpnt->cmnd[0]);
636
637 /*
638 * set SCSIOUT LATCH(initiator)/TARGET(target) (OR-ed) ID
639 */
640 nsp32_write1(base, SCSI_OUT_LATCH_TARGET_ID, BIT(host_id) | BIT(target));
641
642 /*
643 * set SCSI MSGOUT REG
644 *
645 * Note: If the range of msgout_len is 1 - 3, fill scsi_msgout.
646 * over 3 messages needs another routine.
647 */
648 if (data->msgout_len == 0) {
649 nsp32_msg(KERN_ERR, "SCSI MsgOut without any message!");
650 SCpnt->result = DID_ERROR << 16;
651 status = 1;
652 goto out;
653 } else if (data->msgout_len > 0 && data->msgout_len <= 3) {
654 msgout = 0;
655 for (i = 0; i < data->msgout_len; i++) {
656 /*
657 * the sending order of the message is:
658 * MCNT 3: MSG#0 -> MSG#1 -> MSG#2
659 * MCNT 2: MSG#1 -> MSG#2
660 * MCNT 1: MSG#2
661 */
662 msgout >>= 8;
663 msgout |= ((unsigned int)(data->msgoutbuf[i]) << 24);
664 }
665 msgout |= MV_VALID; /* MV valid */
666 msgout |= (unsigned int)data->msgout_len; /* len */
667 nsp32_write4(base, SCSI_MSG_OUT, msgout);
668 } else {
669 /* data->msgout_len > 3 */
670 nsp32_write4(base, SCSI_MSG_OUT, 0);
671 }
672
673 /*
674 * set selection timeout(= 250ms)
675 */
676 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
677
678 /*
679 * set SREQ hazard killer sampling rate
680 *
681 * TODO: sample_rate (BASE+0F) is 0 when internal clock = 40MHz.
682 * check other internal clock!
683 */
684 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
685
686 /*
687 * clear Arbit
688 */
689 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
690
691 /*
692 * set SYNCREG
693 * Don't set BM_START_ADR before setting this register.
694 */
695 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
696
697 /*
698 * set ACKWIDTH
699 */
700 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
701
702 nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
703 "syncreg=0x%x, ackwidth=0x%x, sgtpaddr=0x%x, id=0x%x",
704 nsp32_read1(base, SYNC_REG), nsp32_read1(base, ACK_WIDTH),
705 nsp32_read4(base, SGT_ADR), nsp32_read1(base, SCSI_OUT_LATCH_TARGET_ID));
706 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "msgout_len=%d, msgout=0x%x",
707 data->msgout_len, msgout);
708
709 /*
710 * set SGT ADDR (physical address)
711 */
712 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
713
714 /*
715 * set TRANSFER CONTROL REG
716 */
717 command = 0;
718 command |= (TRANSFER_GO | ALL_COUNTER_CLR);
719 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
2e917246 720 if (scsi_bufflen(SCpnt) > 0) {
1da177e4
LT		 721 command |= BM_START;
722 }
723 } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
724 command |= CB_MMIO_MODE;
725 } else if (data->trans_method & NSP32_TRANSFER_PIO) {
726 command |= CB_IO_MODE;
727 }
728 nsp32_write2(base, TRANSFER_CONTROL, command);
729
730 /*
731 * start AUTO SCSI, kick off arbitration
732 */
733 command = (CLEAR_CDB_FIFO_POINTER |
734 AUTOSCSI_START |
735 AUTO_MSGIN_00_OR_04 |
736 AUTO_MSGIN_02 |
737 AUTO_ATN );
738 nsp32_write2(base, COMMAND_CONTROL, command);
739
740 /*
741 * Check arbitration
742 */
743 status = nsp32_arbitration(SCpnt, base);
744
745 out:
746 /*
747 * IRQ enable
748 */
749 nsp32_write2(base, IRQ_CONTROL, 0);
750
751 return status;
752}
753
754
755/*
756 * Arbitration Status Check
757 *
758 * Note: Arbitration counter is waited during ARBIT_GO is not lifting.
759 * Using udelay(1) consumes CPU time and system time, but
760 * arbitration delay time is defined minimal 2.4us in SCSI
761 * specification, thus udelay works as coarse grained wait timer.
762 */
763static int nsp32_arbitration(struct scsi_cmnd *SCpnt, unsigned int base)
764{
765 unsigned char arbit;
766 int status = TRUE;
767 int time = 0;
768
769 do {
770 arbit = nsp32_read1(base, ARBIT_STATUS);
771 time++;
772 } while ((arbit & (ARBIT_WIN | ARBIT_FAIL)) == 0 &&
773 (time <= ARBIT_TIMEOUT_TIME));
774
775 nsp32_dbg(NSP32_DEBUG_AUTOSCSI,
776 "arbit: 0x%x, delay time: %d", arbit, time);
777
778 if (arbit & ARBIT_WIN) {
779 /* Arbitration succeeded */
780 SCpnt->result = DID_OK << 16;
781 nsp32_index_write1(base, EXT_PORT, LED_ON); /* PCI LED on */
782 } else if (arbit & ARBIT_FAIL) {
783 /* Arbitration failed */
784 SCpnt->result = DID_BUS_BUSY << 16;
785 status = FALSE;
786 } else {
787 /*
788 * unknown error or ARBIT_GO timeout,
789 * something lock up! guess no connection.
790 */
791 nsp32_dbg(NSP32_DEBUG_AUTOSCSI, "arbit timeout");
792 SCpnt->result = DID_NO_CONNECT << 16;
793 status = FALSE;
794 }
795
796 /*
797 * clear Arbit
798 */
799 nsp32_write1(base, SET_ARBIT, ARBIT_CLEAR);
800
801 return status;
802}
803
804
805/*
806 * reselection
807 *
808 * Note: This reselection routine is called from msgin_occur,
809 * reselection target id&lun must be already set.
810 * SCSI-2 says IDENTIFY implies RESTORE_POINTER operation.
811 */
812static int nsp32_reselection(struct scsi_cmnd *SCpnt, unsigned char newlun)
813{
814 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
815 unsigned int host_id = SCpnt->device->host->this_id;
816 unsigned int base = SCpnt->device->host->io_port;
817 unsigned char tmpid, newid;
818
819 nsp32_dbg(NSP32_DEBUG_RESELECTION, "enter");
820
821 /*
822 * calculate reselected SCSI ID
823 */
824 tmpid = nsp32_read1(base, RESELECT_ID);
825 tmpid &= (~BIT(host_id));
826 newid = 0;
827 while (tmpid) {
828 if (tmpid & 1) {
829 break;
830 }
831 tmpid >>= 1;
832 newid++;
833 }
834
835 /*
836 * If reselected New ID:LUN is not existed
837 * or current nexus is not existed, unexpected
838 * reselection is occurred. Send reject message.
839 */
840 if (newid >= ARRAY_SIZE(data->lunt) || newlun >= ARRAY_SIZE(data->lunt[0])) {
841 nsp32_msg(KERN_WARNING, "unknown id/lun");
842 return FALSE;
843 } else if(data->lunt[newid][newlun].SCpnt == NULL) {
844 nsp32_msg(KERN_WARNING, "no SCSI command is processing");
845 return FALSE;
846 }
847
848 data->cur_id = newid;
849 data->cur_lun = newlun;
850 data->cur_target = &(data->target[newid]);
851 data->cur_lunt = &(data->lunt[newid][newlun]);
852
853 /* reset SACK/SavedACK counter (or ALL clear?) */
854 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
855
856 return TRUE;
857}
858
859
860/*
861 * nsp32_setup_sg_table - build scatter gather list for transfer data
862 * with bus master.
863 *
864 * Note: NinjaSCSI-32Bi/UDE bus master can not transfer over 64KB at a time.
865 */
866static int nsp32_setup_sg_table(struct scsi_cmnd *SCpnt)
867{
868 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2e917246 869 struct scatterlist *sg;
1da177e4
LT		 870 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
871 int num, i;
872 u32_le l;
873
1da177e4
LT		 874 if (sgt == NULL) {
875 nsp32_dbg(NSP32_DEBUG_SGLIST, "SGT == null");
876 return FALSE;
877 }
878
2e917246
FT		 879 num = scsi_dma_map(SCpnt);
880 if (!num)
881 return TRUE;
882 else if (num < 0)
883 return FALSE;
884 else {
885 scsi_for_each_sg(SCpnt, sg, num, i) {
1da177e4
LT		 886 /*
887 * Build nsp32_sglist, substitute sg dma addresses.
888 */
2e917246
FT		 889 sgt[i].addr = cpu_to_le32(sg_dma_address(sg));
890 sgt[i].len = cpu_to_le32(sg_dma_len(sg));
1da177e4
LT		 891
892 if (le32_to_cpu(sgt[i].len) > 0x10000) {
893 nsp32_msg(KERN_ERR,
894 "can't transfer over 64KB at a time, size=0x%lx", le32_to_cpu(sgt[i].len));
895 return FALSE;
896 }
897 nsp32_dbg(NSP32_DEBUG_SGLIST,
898 "num 0x%x : addr 0x%lx len 0x%lx",
899 i,
900 le32_to_cpu(sgt[i].addr),
901 le32_to_cpu(sgt[i].len ));
902 }
903
904 /* set end mark */
905 l = le32_to_cpu(sgt[num-1].len);
906 sgt[num-1].len = cpu_to_le32(l | SGTEND);
1da177e4
LT		 907 }
908
909 return TRUE;
910}
911
912static int nsp32_queuecommand(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
913{
914 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
915 nsp32_target *target;
916 nsp32_lunt *cur_lunt;
917 int ret;
918
919 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
920 "enter. target: 0x%x LUN: 0x%x cmnd: 0x%x cmndlen: 0x%x "
921 "use_sg: 0x%x reqbuf: 0x%lx reqlen: 0x%x",
922 SCpnt->device->id, SCpnt->device->lun, SCpnt->cmnd[0], SCpnt->cmd_len,
2e917246 923 scsi_sg_count(SCpnt), scsi_sglist(SCpnt), scsi_bufflen(SCpnt));
1da177e4
LT		 924
925 if (data->CurrentSC != NULL) {
926 nsp32_msg(KERN_ERR, "Currentsc != NULL. Cancel this command request");
927 data->CurrentSC = NULL;
928 SCpnt->result = DID_NO_CONNECT << 16;
929 done(SCpnt);
930 return 0;
931 }
932
933 /* check target ID is not same as this initiator ID */
422c0d61 934 if (scmd_id(SCpnt) == SCpnt->device->host->this_id) {
1da177e4
LT		 935 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "terget==host???");
936 SCpnt->result = DID_BAD_TARGET << 16;
937 done(SCpnt);
938 return 0;
939 }
940
941 /* check target LUN is allowable value */
942 if (SCpnt->device->lun >= MAX_LUN) {
943 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "no more lun");
944 SCpnt->result = DID_BAD_TARGET << 16;
945 done(SCpnt);
946 return 0;
947 }
948
949 show_command(SCpnt);
950
951 SCpnt->scsi_done = done;
952 data->CurrentSC = SCpnt;
953 SCpnt->SCp.Status = CHECK_CONDITION;
954 SCpnt->SCp.Message = 0;
2e917246 955 scsi_set_resid(SCpnt, scsi_bufflen(SCpnt));
1da177e4 956
2e917246
FT		 957 SCpnt->SCp.ptr = (char *)scsi_sglist(SCpnt);
958 SCpnt->SCp.this_residual = scsi_bufflen(SCpnt);
1da177e4
LT		 959 SCpnt->SCp.buffer = NULL;
960 SCpnt->SCp.buffers_residual = 0;
961
962 /* initialize data */
963 data->msgout_len = 0;
964 data->msgin_len = 0;
965 cur_lunt = &(data->lunt[SCpnt->device->id][SCpnt->device->lun]);
966 cur_lunt->SCpnt = SCpnt;
967 cur_lunt->save_datp = 0;
968 cur_lunt->msgin03 = FALSE;
969 data->cur_lunt = cur_lunt;
970 data->cur_id = SCpnt->device->id;
971 data->cur_lun = SCpnt->device->lun;
972
973 ret = nsp32_setup_sg_table(SCpnt);
974 if (ret == FALSE) {
975 nsp32_msg(KERN_ERR, "SGT fail");
976 SCpnt->result = DID_ERROR << 16;
977 nsp32_scsi_done(SCpnt);
978 return 0;
979 }
980
981 /* Build IDENTIFY */
982 nsp32_build_identify(SCpnt);
983
984 /*
985 * If target is the first time to transfer after the reset
986 * (target don't have SDTR_DONE and SDTR_INITIATOR), sync
987 * message SDTR is needed to do synchronous transfer.
988 */
422c0d61 989 target = &data->target[scmd_id(SCpnt)];
1da177e4
LT		 990 data->cur_target = target;
991
992 if (!(target->sync_flag & (SDTR_DONE | SDTR_INITIATOR | SDTR_TARGET))) {
993 unsigned char period, offset;
994
995 if (trans_mode != ASYNC_MODE) {
996 nsp32_set_max_sync(data, target, &period, &offset);
997 nsp32_build_sdtr(SCpnt, period, offset);
998 target->sync_flag |= SDTR_INITIATOR;
999 } else {
1000 nsp32_set_async(data, target);
1001 target->sync_flag |= SDTR_DONE;
1002 }
1003
1004 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1005 "SDTR: entry: %d start_period: 0x%x offset: 0x%x\n",
1006 target->limit_entry, period, offset);
1007 } else if (target->sync_flag & SDTR_INITIATOR) {
1008 /*
1009 * It was negotiating SDTR with target, sending from the
1010 * initiator, but there are no chance to remove this flag.
1011 * Set async because we don't get proper negotiation.
1012 */
1013 nsp32_set_async(data, target);
1014 target->sync_flag &= ~SDTR_INITIATOR;
1015 target->sync_flag |= SDTR_DONE;
1016
1017 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1018 "SDTR_INITIATOR: fall back to async");
1019 } else if (target->sync_flag & SDTR_TARGET) {
1020 /*
1021 * It was negotiating SDTR with target, sending from target,
1022 * but there are no chance to remove this flag. Set async
1023 * because we don't get proper negotiation.
1024 */
1025 nsp32_set_async(data, target);
1026 target->sync_flag &= ~SDTR_TARGET;
1027 target->sync_flag |= SDTR_DONE;
1028
1029 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND,
1030 "Unknown SDTR from target is reached, fall back to async.");
1031 }
1032
1033 nsp32_dbg(NSP32_DEBUG_TARGETFLAG,
1034 "target: %d sync_flag: 0x%x syncreg: 0x%x ackwidth: 0x%x",
1035 SCpnt->device->id, target->sync_flag, target->syncreg,
1036 target->ackwidth);
1037
1038 /* Selection */
1039 if (auto_param == 0) {
1040 ret = nsp32_selection_autopara(SCpnt);
1041 } else {
1042 ret = nsp32_selection_autoscsi(SCpnt);
1043 }
1044
1045 if (ret != TRUE) {
1046 nsp32_dbg(NSP32_DEBUG_QUEUECOMMAND, "selection fail");
1047 nsp32_scsi_done(SCpnt);
1048 }
1049
1050 return 0;
1051}
1052
1053/* initialize asic */
1054static int nsp32hw_init(nsp32_hw_data *data)
1055{
1056 unsigned int base = data->BaseAddress;
1057 unsigned short irq_stat;
1058 unsigned long lc_reg;
1059 unsigned char power;
1060
1061 lc_reg = nsp32_index_read4(base, CFG_LATE_CACHE);
1062 if ((lc_reg & 0xff00) == 0) {
1063 lc_reg |= (0x20 << 8);
1064 nsp32_index_write2(base, CFG_LATE_CACHE, lc_reg & 0xffff);
1065 }
1066
1067 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
1068 nsp32_write2(base, TRANSFER_CONTROL, 0);
1069 nsp32_write4(base, BM_CNT, 0);
1070 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1071
1072 do {
1073 irq_stat = nsp32_read2(base, IRQ_STATUS);
1074 nsp32_dbg(NSP32_DEBUG_INIT, "irq_stat 0x%x", irq_stat);
1075 } while (irq_stat & IRQSTATUS_ANY_IRQ);
1076
1077 /*
1078 * Fill FIFO_FULL_SHLD, FIFO_EMPTY_SHLD. Below parameter is
1079 * designated by specification.
1080 */
1081 if ((data->trans_method & NSP32_TRANSFER_PIO) ||
1082 (data->trans_method & NSP32_TRANSFER_MMIO)) {
1083 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x40);
1084 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x40);
1085 } else if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
1086 nsp32_index_write1(base, FIFO_FULL_SHLD_COUNT, 0x10);
1087 nsp32_index_write1(base, FIFO_EMPTY_SHLD_COUNT, 0x60);
1088 } else {
1089 nsp32_dbg(NSP32_DEBUG_INIT, "unknown transfer mode");
1090 }
1091
1092 nsp32_dbg(NSP32_DEBUG_INIT, "full 0x%x emp 0x%x",
1093 nsp32_index_read1(base, FIFO_FULL_SHLD_COUNT),
1094 nsp32_index_read1(base, FIFO_EMPTY_SHLD_COUNT));
1095
1096 nsp32_index_write1(base, CLOCK_DIV, data->clock);
1097 nsp32_index_write1(base, BM_CYCLE, MEMRD_CMD1 | SGT_AUTO_PARA_MEMED_CMD);
1098 nsp32_write1(base, PARITY_CONTROL, 0); /* parity check is disable */
1099
1100 /*
1101 * initialize MISC_WRRD register
1102 *
1103 * Note: Designated parameters is obeyed as following:
1104 * MISC_SCSI_DIRECTION_DETECTOR_SELECT: It must be set.
1105 * MISC_MASTER_TERMINATION_SELECT: It must be set.
1106 * MISC_BMREQ_NEGATE_TIMING_SEL: It should be set.
1107 * MISC_AUTOSEL_TIMING_SEL: It should be set.
1108 * MISC_BMSTOP_CHANGE2_NONDATA_PHASE: It should be set.
1109 * MISC_DELAYED_BMSTART: It's selected for safety.
1110 *
1111 * Note: If MISC_BMSTOP_CHANGE2_NONDATA_PHASE is set, then
1112 * we have to set TRANSFERCONTROL_BM_START as 0 and set
1113 * appropriate value before restarting bus master transfer.
1114 */
1115 nsp32_index_write2(base, MISC_WR,
1116 (SCSI_DIRECTION_DETECTOR_SELECT |
1117 DELAYED_BMSTART |
1118 MASTER_TERMINATION_SELECT |
1119 BMREQ_NEGATE_TIMING_SEL |
1120 AUTOSEL_TIMING_SEL |
1121 BMSTOP_CHANGE2_NONDATA_PHASE));
1122
1123 nsp32_index_write1(base, TERM_PWR_CONTROL, 0);
1124 power = nsp32_index_read1(base, TERM_PWR_CONTROL);
1125 if (!(power & SENSE)) {
1126 nsp32_msg(KERN_INFO, "term power on");
1127 nsp32_index_write1(base, TERM_PWR_CONTROL, BPWR);
1128 }
1129
1130 nsp32_write2(base, TIMER_SET, TIMER_STOP);
1131 nsp32_write2(base, TIMER_SET, TIMER_STOP); /* Required 2 times */
1132
1133 nsp32_write1(base, SYNC_REG, 0);
1134 nsp32_write1(base, ACK_WIDTH, 0);
1135 nsp32_write2(base, SEL_TIME_OUT, SEL_TIMEOUT_TIME);
1136
1137 /*
1138 * enable to select designated IRQ (except for
1139 * IRQSELECT_SERR, IRQSELECT_PERR, IRQSELECT_BMCNTERR)
1140 */
1141 nsp32_index_write2(base, IRQ_SELECT, IRQSELECT_TIMER_IRQ |
1142 IRQSELECT_SCSIRESET_IRQ |
1143 IRQSELECT_FIFO_SHLD_IRQ |
1144 IRQSELECT_RESELECT_IRQ |
1145 IRQSELECT_PHASE_CHANGE_IRQ |
1146 IRQSELECT_AUTO_SCSI_SEQ_IRQ |
1147 // IRQSELECT_BMCNTERR_IRQ |
1148 IRQSELECT_TARGET_ABORT_IRQ |
1149 IRQSELECT_MASTER_ABORT_IRQ );
1150 nsp32_write2(base, IRQ_CONTROL, 0);
1151
1152 /* PCI LED off */
1153 nsp32_index_write1(base, EXT_PORT_DDR, LED_OFF);
1154 nsp32_index_write1(base, EXT_PORT, LED_OFF);
1155
1156 return TRUE;
1157}
1158
1159
1160/* interrupt routine */
7d12e780 1161static irqreturn_t do_nsp32_isr(int irq, void *dev_id)
1da177e4
LT		 1162{
1163 nsp32_hw_data *data = dev_id;
1164 unsigned int base = data->BaseAddress;
1165 struct scsi_cmnd *SCpnt = data->CurrentSC;
1166 unsigned short auto_stat, irq_stat, trans_stat;
1167 unsigned char busmon, busphase;
1168 unsigned long flags;
1169 int ret;
1170 int handled = 0;
1da177e4 1171 struct Scsi_Host *host = data->Host;
6a31a8a6 1172
1da177e4 1173 spin_lock_irqsave(host->host_lock, flags);
1da177e4
LT		 1174
1175 /*
1176 * IRQ check, then enable IRQ mask
1177 */
1178 irq_stat = nsp32_read2(base, IRQ_STATUS);
1179 nsp32_dbg(NSP32_DEBUG_INTR,
1180 "enter IRQ: %d, IRQstatus: 0x%x", irq, irq_stat);
1181 /* is this interrupt comes from Ninja asic? */
1182 if ((irq_stat & IRQSTATUS_ANY_IRQ) == 0) {
1183 nsp32_dbg(NSP32_DEBUG_INTR, "shared interrupt: irq other 0x%x", irq_stat);
1184 goto out2;
1185 }
1186 handled = 1;
1187 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
1188
1189 busmon = nsp32_read1(base, SCSI_BUS_MONITOR);
1190 busphase = busmon & BUSMON_PHASE_MASK;
1191
1192 trans_stat = nsp32_read2(base, TRANSFER_STATUS);
1193 if ((irq_stat == 0xffff) && (trans_stat == 0xffff)) {
1194 nsp32_msg(KERN_INFO, "card disconnect");
1195 if (data->CurrentSC != NULL) {
1196 nsp32_msg(KERN_INFO, "clean up current SCSI command");
1197 SCpnt->result = DID_BAD_TARGET << 16;
1198 nsp32_scsi_done(SCpnt);
1199 }
1200 goto out;
1201 }
1202
1203 /* Timer IRQ */
1204 if (irq_stat & IRQSTATUS_TIMER_IRQ) {
1205 nsp32_dbg(NSP32_DEBUG_INTR, "timer stop");
1206 nsp32_write2(base, TIMER_SET, TIMER_STOP);
1207 goto out;
1208 }
1209
1210 /* SCSI reset */
1211 if (irq_stat & IRQSTATUS_SCSIRESET_IRQ) {
1212 nsp32_msg(KERN_INFO, "detected someone do bus reset");
1213 nsp32_do_bus_reset(data);
1214 if (SCpnt != NULL) {
1215 SCpnt->result = DID_RESET << 16;
1216 nsp32_scsi_done(SCpnt);
1217 }
1218 goto out;
1219 }
1220
1221 if (SCpnt == NULL) {
1222 nsp32_msg(KERN_WARNING, "SCpnt==NULL this can't be happened");
1223 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1224 goto out;
1225 }
1226
1227 /*
1228 * AutoSCSI Interrupt.
1229 * Note: This interrupt is occurred when AutoSCSI is finished. Then
1230 * check SCSIEXECUTEPHASE, and do appropriate action. Each phases are
1231 * recorded when AutoSCSI sequencer has been processed.
1232 */
1233 if(irq_stat & IRQSTATUS_AUTOSCSI_IRQ) {
1234 /* getting SCSI executed phase */
1235 auto_stat = nsp32_read2(base, SCSI_EXECUTE_PHASE);
1236 nsp32_write2(base, SCSI_EXECUTE_PHASE, 0);
1237
1238 /* Selection Timeout, go busfree phase. */
1239 if (auto_stat & SELECTION_TIMEOUT) {
1240 nsp32_dbg(NSP32_DEBUG_INTR,
1241 "selection timeout occurred");
1242
1243 SCpnt->result = DID_TIME_OUT << 16;
1244 nsp32_scsi_done(SCpnt);
1245 goto out;
1246 }
1247
1248 if (auto_stat & MSGOUT_PHASE) {
1249 /*
1250 * MsgOut phase was processed.
1251 * If MSG_IN_OCCUER is not set, then MsgOut phase is
1252 * completed. Thus, msgout_len must reset. Otherwise,
1253 * nothing to do here. If MSG_OUT_OCCUER is occurred,
1254 * then we will encounter the condition and check.
1255 */
1256 if (!(auto_stat & MSG_IN_OCCUER) &&
1257 (data->msgout_len <= 3)) {
1258 /*
1259 * !MSG_IN_OCCUER && msgout_len <=3
1260 * ---> AutoSCSI with MSGOUTreg is processed.
1261 */
1262 data->msgout_len = 0;
1263 };
1264
1265 nsp32_dbg(NSP32_DEBUG_INTR, "MsgOut phase processed");
1266 }
1267
1268 if ((auto_stat & DATA_IN_PHASE) &&
2e917246 1269 (scsi_get_resid(SCpnt) > 0) &&
1da177e4
LT		 1270 ((nsp32_read2(base, FIFO_REST_CNT) & FIFO_REST_MASK) != 0)) {
1271 printk( "auto+fifo\n");
1272 //nsp32_pio_read(SCpnt);
1273 }
1274
1275 if (auto_stat & (DATA_IN_PHASE | DATA_OUT_PHASE)) {
1276 /* DATA_IN_PHASE/DATA_OUT_PHASE was processed. */
1277 nsp32_dbg(NSP32_DEBUG_INTR,
1278 "Data in/out phase processed");
1279
1280 /* read BMCNT, SGT pointer addr */
1281 nsp32_dbg(NSP32_DEBUG_INTR, "BMCNT=0x%lx",
1282 nsp32_read4(base, BM_CNT));
1283 nsp32_dbg(NSP32_DEBUG_INTR, "addr=0x%lx",
1284 nsp32_read4(base, SGT_ADR));
1285 nsp32_dbg(NSP32_DEBUG_INTR, "SACK=0x%lx",
1286 nsp32_read4(base, SACK_CNT));
1287 nsp32_dbg(NSP32_DEBUG_INTR, "SSACK=0x%lx",
1288 nsp32_read4(base, SAVED_SACK_CNT));
1289
2e917246 1290 scsi_set_resid(SCpnt, 0); /* all data transfered! */
1da177e4
LT		 1291 }
1292
1293 /*
1294 * MsgIn Occur
1295 */
1296 if (auto_stat & MSG_IN_OCCUER) {
1297 nsp32_msgin_occur(SCpnt, irq_stat, auto_stat);
1298 }
1299
1300 /*
1301 * MsgOut Occur
1302 */
1303 if (auto_stat & MSG_OUT_OCCUER) {
1304 nsp32_msgout_occur(SCpnt);
1305 }
1306
1307 /*
1308 * Bus Free Occur
1309 */
1310 if (auto_stat & BUS_FREE_OCCUER) {
1311 ret = nsp32_busfree_occur(SCpnt, auto_stat);
1312 if (ret == TRUE) {
1313 goto out;
1314 }
1315 }
1316
1317 if (auto_stat & STATUS_PHASE) {
1318 /*
1319 * Read CSB and substitute CSB for SCpnt->result
1320 * to save status phase stutas byte.
1321 * scsi error handler checks host_byte (DID_*:
1322 * low level driver to indicate status), then checks
1323 * status_byte (SCSI status byte).
1324 */
1325 SCpnt->result = (int)nsp32_read1(base, SCSI_CSB_IN);
1326 }
1327
1328 if (auto_stat & ILLEGAL_PHASE) {
1329 /* Illegal phase is detected. SACK is not back. */
1330 nsp32_msg(KERN_WARNING,
1331 "AUTO SCSI ILLEGAL PHASE OCCUR!!!!");
1332
1333 /* TODO: currently we don't have any action... bus reset? */
1334
1335 /*
1336 * To send back SACK, assert, wait, and negate.
1337 */
1338 nsp32_sack_assert(data);
1339 nsp32_wait_req(data, NEGATE);
1340 nsp32_sack_negate(data);
1341
1342 }
1343
1344 if (auto_stat & COMMAND_PHASE) {
1345 /* nothing to do */
1346 nsp32_dbg(NSP32_DEBUG_INTR, "Command phase processed");
1347 }
1348
1349 if (auto_stat & AUTOSCSI_BUSY) {
1350 /* AutoSCSI is running */
1351 }
1352
1353 show_autophase(auto_stat);
1354 }
1355
1356 /* FIFO_SHLD_IRQ */
1357 if (irq_stat & IRQSTATUS_FIFO_SHLD_IRQ) {
1358 nsp32_dbg(NSP32_DEBUG_INTR, "FIFO IRQ");
1359
1360 switch(busphase) {
1361 case BUSPHASE_DATA_OUT:
1362 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/write");
1363
1364 //nsp32_pio_write(SCpnt);
1365
1366 break;
1367
1368 case BUSPHASE_DATA_IN:
1369 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/read");
1370
1371 //nsp32_pio_read(SCpnt);
1372
1373 break;
1374
1375 case BUSPHASE_STATUS:
1376 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/status");
1377
1378 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1379
1380 break;
1381 default:
1382 nsp32_dbg(NSP32_DEBUG_INTR, "fifo/other phase");
1383 nsp32_dbg(NSP32_DEBUG_INTR, "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1384 show_busphase(busphase);
1385 break;
1386 }
1387
1388 goto out;
1389 }
1390
1391 /* Phase Change IRQ */
1392 if (irq_stat & IRQSTATUS_PHASE_CHANGE_IRQ) {
1393 nsp32_dbg(NSP32_DEBUG_INTR, "phase change IRQ");
1394
1395 switch(busphase) {
1396 case BUSPHASE_MESSAGE_IN:
1397 nsp32_dbg(NSP32_DEBUG_INTR, "phase chg/msg in");
1398 nsp32_msgin_occur(SCpnt, irq_stat, 0);
1399 break;
1400 default:
1401 nsp32_msg(KERN_WARNING, "phase chg/other phase?");
1402 nsp32_msg(KERN_WARNING, "irq_stat=0x%x trans_stat=0x%x\n",
1403 irq_stat, trans_stat);
1404 show_busphase(busphase);
1405 break;
1406 }
1407 goto out;
1408 }
1409
1410 /* PCI_IRQ */
1411 if (irq_stat & IRQSTATUS_PCI_IRQ) {
1412 nsp32_dbg(NSP32_DEBUG_INTR, "PCI IRQ occurred");
1413 /* Do nothing */
1414 }
1415
1416 /* BMCNTERR_IRQ */
1417 if (irq_stat & IRQSTATUS_BMCNTERR_IRQ) {
1418 nsp32_msg(KERN_ERR, "Received unexpected BMCNTERR IRQ! ");
1419 /*
1420 * TODO: To be implemented improving bus master
06fe9fb4 1421 * transfer reliability when BMCNTERR is occurred in
1da177e4
LT		 1422 * AutoSCSI phase described in specification.
1423 */
1424 }
1425
1426#if 0
1427 nsp32_dbg(NSP32_DEBUG_INTR,
1428 "irq_stat=0x%x trans_stat=0x%x", irq_stat, trans_stat);
1429 show_busphase(busphase);
1430#endif
1431
1432 out:
1433 /* disable IRQ mask */
1434 nsp32_write2(base, IRQ_CONTROL, 0);
1435
1436 out2:
1da177e4 1437 spin_unlock_irqrestore(host->host_lock, flags);
1da177e4
LT		 1438
1439 nsp32_dbg(NSP32_DEBUG_INTR, "exit");
1440
1441 return IRQ_RETVAL(handled);
1442}
1443
1444#undef SPRINTF
1445#define SPRINTF(args...) \
1446 do { \
1447 if(length > (pos - buffer)) { \
1448 pos += snprintf(pos, length - (pos - buffer) + 1, ## args); \
1449 nsp32_dbg(NSP32_DEBUG_PROC, "buffer=0x%p pos=0x%p length=%d %d\n", buffer, pos, length, length - (pos - buffer));\
1450 } \
1451 } while(0)
6a31a8a6
AB		 1452
1453static int nsp32_proc_info(struct Scsi_Host *host, char *buffer, char **start,
1454 off_t offset, int length, int inout)
1da177e4
LT		 1455{
1456 char *pos = buffer;
1457 int thislength;
1458 unsigned long flags;
1459 nsp32_hw_data *data;
1da177e4 1460 int hostno;
1da177e4
LT		 1461 unsigned int base;
1462 unsigned char mode_reg;
1463 int id, speed;
1464 long model;
1465
1466 /* Write is not supported, just return. */
1467 if (inout == TRUE) {
1468 return -EINVAL;
1469 }
1470
1da177e4 1471 hostno = host->host_no;
1da177e4
LT		 1472 data = (nsp32_hw_data *)host->hostdata;
1473 base = host->io_port;
1474
1475 SPRINTF("NinjaSCSI-32 status\n\n");
1476 SPRINTF("Driver version: %s, $Revision: 1.33 $\n", nsp32_release_version);
1477 SPRINTF("SCSI host No.: %d\n", hostno);
1478 SPRINTF("IRQ: %d\n", host->irq);
1479 SPRINTF("IO: 0x%lx-0x%lx\n", host->io_port, host->io_port + host->n_io_port - 1);
1480 SPRINTF("MMIO(virtual address): 0x%lx-0x%lx\n", host->base, host->base + data->MmioLength - 1);
1481 SPRINTF("sg_tablesize: %d\n", host->sg_tablesize);
1482 SPRINTF("Chip revision: 0x%x\n", (nsp32_read2(base, INDEX_REG) >> 8) & 0xff);
1483
1484 mode_reg = nsp32_index_read1(base, CHIP_MODE);
1485 model = data->pci_devid->driver_data;
1486
1487#ifdef CONFIG_PM
1488 SPRINTF("Power Management: %s\n", (mode_reg & OPTF) ? "yes" : "no");
1489#endif
1490 SPRINTF("OEM: %ld, %s\n", (mode_reg & (OEM0|OEM1)), nsp32_model[model]);
1491
1492 spin_lock_irqsave(&(data->Lock), flags);
1493 SPRINTF("CurrentSC: 0x%p\n\n", data->CurrentSC);
1494 spin_unlock_irqrestore(&(data->Lock), flags);
1495
1496
1497 SPRINTF("SDTR status\n");
1498 for (id = 0; id < ARRAY_SIZE(data->target); id++) {
1499
1500 SPRINTF("id %d: ", id);
1501
1502 if (id == host->this_id) {
1503 SPRINTF("----- NinjaSCSI-32 host adapter\n");
1504 continue;
1505 }
1506
1507 if (data->target[id].sync_flag == SDTR_DONE) {
1508 if (data->target[id].period == 0 &&
1509 data->target[id].offset == ASYNC_OFFSET ) {
1510 SPRINTF("async");
1511 } else {
1512 SPRINTF(" sync");
1513 }
1514 } else {
1515 SPRINTF(" none");
1516 }
1517
1518 if (data->target[id].period != 0) {
1519
1520 speed = 1000000 / (data->target[id].period * 4);
1521
1522 SPRINTF(" transfer %d.%dMB/s, offset %d",
1523 speed / 1000,
1524 speed % 1000,
1525 data->target[id].offset
1526 );
1527 }
1528 SPRINTF("\n");
1529 }
1530
1531
1532 thislength = pos - (buffer + offset);
1533
1534 if(thislength < 0) {
1535 *start = NULL;
1536 return 0;
1537 }
1538
1539
1540 thislength = min(thislength, length);
1541 *start = buffer + offset;
1542
1543 return thislength;
1544}
1545#undef SPRINTF
1546
1547
1548
1549/*
1550 * Reset parameters and call scsi_done for data->cur_lunt.
1551 * Be careful setting SCpnt->result = DID_* before calling this function.
1552 */
1553static void nsp32_scsi_done(struct scsi_cmnd *SCpnt)
1554{
1555 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1556 unsigned int base = SCpnt->device->host->io_port;
1557
2e917246 1558 scsi_dma_unmap(SCpnt);
1da177e4 1559
1da177e4
LT		 1560 /*
1561 * clear TRANSFERCONTROL_BM_START
1562 */
1563 nsp32_write2(base, TRANSFER_CONTROL, 0);
1564 nsp32_write4(base, BM_CNT, 0);
1565
1566 /*
1567 * call scsi_done
1568 */
1569 (*SCpnt->scsi_done)(SCpnt);
1570
1571 /*
1572 * reset parameters
1573 */
1574 data->cur_lunt->SCpnt = NULL;
1575 data->cur_lunt = NULL;
1576 data->cur_target = NULL;
1577 data->CurrentSC = NULL;
1578}
1579
1580
1581/*
1582 * Bus Free Occur
1583 *
1584 * Current Phase is BUSFREE. AutoSCSI is automatically execute BUSFREE phase
1585 * with ACK reply when below condition is matched:
1586 * MsgIn 00: Command Complete.
1587 * MsgIn 02: Save Data Pointer.
1588 * MsgIn 04: Diconnect.
1589 * In other case, unexpected BUSFREE is detected.
1590 */
1591static int nsp32_busfree_occur(struct scsi_cmnd *SCpnt, unsigned short execph)
1592{
1593 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1594 unsigned int base = SCpnt->device->host->io_port;
1595
1596 nsp32_dbg(NSP32_DEBUG_BUSFREE, "enter execph=0x%x", execph);
1597 show_autophase(execph);
1598
1599 nsp32_write4(base, BM_CNT, 0);
1600 nsp32_write2(base, TRANSFER_CONTROL, 0);
1601
1602 /*
1603 * MsgIn 02: Save Data Pointer
1604 *
1605 * VALID:
1606 * Save Data Pointer is received. Adjust pointer.
1607 *
1608 * NO-VALID:
1609 * SCSI-3 says if Save Data Pointer is not received, then we restart
1610 * processing and we can't adjust any SCSI data pointer in next data
1611 * phase.
1612 */
1613 if (execph & MSGIN_02_VALID) {
1614 nsp32_dbg(NSP32_DEBUG_BUSFREE, "MsgIn02_Valid");
1615
1616 /*
1617 * Check sack_cnt/saved_sack_cnt, then adjust sg table if
1618 * needed.
1619 */
1620 if (!(execph & MSGIN_00_VALID) &&
1621 ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE))) {
1622 unsigned int sacklen, s_sacklen;
1623
1624 /*
1625 * Read SACK count and SAVEDSACK count, then compare.
1626 */
1627 sacklen = nsp32_read4(base, SACK_CNT );
1628 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
1629
1630 /*
1631 * If SAVEDSACKCNT == 0, it means SavedDataPointer is
1632 * come after data transfering.
1633 */
1634 if (s_sacklen > 0) {
1635 /*
1636 * Comparing between sack and savedsack to
1637 * check the condition of AutoMsgIn03.
1638 *
1639 * If they are same, set msgin03 == TRUE,
1640 * COMMANDCONTROL_AUTO_MSGIN_03 is enabled at
1641 * reselection. On the other hand, if they
1642 * aren't same, set msgin03 == FALSE, and
1643 * COMMANDCONTROL_AUTO_MSGIN_03 is disabled at
1644 * reselection.
1645 */
1646 if (sacklen != s_sacklen) {
1647 data->cur_lunt->msgin03 = FALSE;
1648 } else {
1649 data->cur_lunt->msgin03 = TRUE;
1650 }
1651
1652 nsp32_adjust_busfree(SCpnt, s_sacklen);
1653 }
1654 }
1655
1656 /* This value has not substitude with valid value yet... */
1657 //data->cur_lunt->save_datp = data->cur_datp;
1658 } else {
1659 /*
1660 * no processing.
1661 */
1662 }
1663
1664 if (execph & MSGIN_03_VALID) {
1665 /* MsgIn03 was valid to be processed. No need processing. */
1666 }
1667
1668 /*
1669 * target SDTR check
1670 */
1671 if (data->cur_target->sync_flag & SDTR_INITIATOR) {
1672 /*
1673 * SDTR negotiation pulled by the initiator has not
1674 * finished yet. Fall back to ASYNC mode.
1675 */
1676 nsp32_set_async(data, data->cur_target);
1677 data->cur_target->sync_flag &= ~SDTR_INITIATOR;
1678 data->cur_target->sync_flag |= SDTR_DONE;
1679 } else if (data->cur_target->sync_flag & SDTR_TARGET) {
1680 /*
1681 * SDTR negotiation pulled by the target has been
1682 * negotiating.
1683 */
1684 if (execph & (MSGIN_00_VALID | MSGIN_04_VALID)) {
1685 /*
1686 * If valid message is received, then
1687 * negotiation is succeeded.
1688 */
1689 } else {
1690 /*
1691 * On the contrary, if unexpected bus free is
1692 * occurred, then negotiation is failed. Fall
1693 * back to ASYNC mode.
1694 */
1695 nsp32_set_async(data, data->cur_target);
1696 }
1697 data->cur_target->sync_flag &= ~SDTR_TARGET;
1698 data->cur_target->sync_flag |= SDTR_DONE;
1699 }
1700
1701 /*
1702 * It is always ensured by SCSI standard that initiator
1703 * switches into Bus Free Phase after
1704 * receiving message 00 (Command Complete), 04 (Disconnect).
1705 * It's the reason that processing here is valid.
1706 */
1707 if (execph & MSGIN_00_VALID) {
1708 /* MsgIn 00: Command Complete */
1709 nsp32_dbg(NSP32_DEBUG_BUSFREE, "command complete");
1710
1711 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1712 SCpnt->SCp.Message = 0;
1713 nsp32_dbg(NSP32_DEBUG_BUSFREE,
1714 "normal end stat=0x%x resid=0x%x\n",
2e917246 1715 SCpnt->SCp.Status, scsi_get_resid(SCpnt));
1da177e4
LT		 1716 SCpnt->result = (DID_OK << 16) |
1717 (SCpnt->SCp.Message << 8) |
1718 (SCpnt->SCp.Status << 0);
1719 nsp32_scsi_done(SCpnt);
1720 /* All operation is done */
1721 return TRUE;
1722 } else if (execph & MSGIN_04_VALID) {
1723 /* MsgIn 04: Disconnect */
1724 SCpnt->SCp.Status = nsp32_read1(base, SCSI_CSB_IN);
1725 SCpnt->SCp.Message = 4;
1726
1727 nsp32_dbg(NSP32_DEBUG_BUSFREE, "disconnect");
1728 return TRUE;
1729 } else {
1730 /* Unexpected bus free */
1731 nsp32_msg(KERN_WARNING, "unexpected bus free occurred");
1732
1733 /* DID_ERROR? */
1734 //SCpnt->result = (DID_OK << 16) | (SCpnt->SCp.Message << 8) | (SCpnt->SCp.Status << 0);
1735 SCpnt->result = DID_ERROR << 16;
1736 nsp32_scsi_done(SCpnt);
1737 return TRUE;
1738 }
1739 return FALSE;
1740}
1741
1742
1743/*
1744 * nsp32_adjust_busfree - adjusting SG table
1745 *
1746 * Note: This driver adjust the SG table using SCSI ACK
1747 * counter instead of BMCNT counter!
1748 */
1749static void nsp32_adjust_busfree(struct scsi_cmnd *SCpnt, unsigned int s_sacklen)
1750{
1751 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1752 int old_entry = data->cur_entry;
1753 int new_entry;
1754 int sg_num = data->cur_lunt->sg_num;
1755 nsp32_sgtable *sgt = data->cur_lunt->sglun->sgt;
1756 unsigned int restlen, sentlen;
1757 u32_le len, addr;
1758
2e917246 1759 nsp32_dbg(NSP32_DEBUG_SGLIST, "old resid=0x%x", scsi_get_resid(SCpnt));
1da177e4
LT		 1760
1761 /* adjust saved SACK count with 4 byte start address boundary */
1762 s_sacklen -= le32_to_cpu(sgt[old_entry].addr) & 3;
1763
1764 /*
1765 * calculate new_entry from sack count and each sgt[].len
1766 * calculate the byte which is intent to send
1767 */
1768 sentlen = 0;
1769 for (new_entry = old_entry; new_entry < sg_num; new_entry++) {
1770 sentlen += (le32_to_cpu(sgt[new_entry].len) & ~SGTEND);
1771 if (sentlen > s_sacklen) {
1772 break;
1773 }
1774 }
1775
1776 /* all sgt is processed */
1777 if (new_entry == sg_num) {
1778 goto last;
1779 }
1780
1781 if (sentlen == s_sacklen) {
1782 /* XXX: confirm it's ok or not */
1783 /* In this case, it's ok because we are at
1784 the head element of the sg. restlen is correctly calculated. */
1785 }
1786
1787 /* calculate the rest length for transfering */
1788 restlen = sentlen - s_sacklen;
1789
1790 /* update adjusting current SG table entry */
1791 len = le32_to_cpu(sgt[new_entry].len);
1792 addr = le32_to_cpu(sgt[new_entry].addr);
1793 addr += (len - restlen);
1794 sgt[new_entry].addr = cpu_to_le32(addr);
1795 sgt[new_entry].len = cpu_to_le32(restlen);
1796
1797 /* set cur_entry with new_entry */
1798 data->cur_entry = new_entry;
1799
1800 return;
1801
1802 last:
2e917246 1803 if (scsi_get_resid(SCpnt) < sentlen) {
1da177e4
LT		 1804 nsp32_msg(KERN_ERR, "resid underflow");
1805 }
1806
2e917246
FT		 1807 scsi_set_resid(SCpnt, scsi_get_resid(SCpnt) - sentlen);
1808 nsp32_dbg(NSP32_DEBUG_SGLIST, "new resid=0x%x", scsi_get_resid(SCpnt));
1da177e4
LT		 1809
1810 /* update hostdata and lun */
1811
1812 return;
1813}
1814
1815
1816/*
1817 * It's called MsgOut phase occur.
1818 * NinjaSCSI-32Bi/UDE automatically processes up to 3 messages in
1819 * message out phase. It, however, has more than 3 messages,
1820 * HBA creates the interrupt and we have to process by hand.
1821 */
1822static void nsp32_msgout_occur(struct scsi_cmnd *SCpnt)
1823{
1824 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1825 unsigned int base = SCpnt->device->host->io_port;
1826 //unsigned short command;
1827 long new_sgtp;
1828 int i;
1829
1830 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1831 "enter: msgout_len: 0x%x", data->msgout_len);
1832
1833 /*
1834 * If MsgOut phase is occurred without having any
1835 * message, then No_Operation is sent (SCSI-2).
1836 */
1837 if (data->msgout_len == 0) {
1838 nsp32_build_nop(SCpnt);
1839 }
1840
1841 /*
1842 * Set SGTP ADDR current entry for restarting AUTOSCSI,
1843 * because SGTP is incremented next point.
1844 * There is few statement in the specification...
1845 */
1846 new_sgtp = data->cur_lunt->sglun_paddr +
1847 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
1848
1849 /*
1850 * send messages
1851 */
1852 for (i = 0; i < data->msgout_len; i++) {
1853 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR,
1854 "%d : 0x%x", i, data->msgoutbuf[i]);
1855
1856 /*
1857 * Check REQ is asserted.
1858 */
1859 nsp32_wait_req(data, ASSERT);
1860
1861 if (i == (data->msgout_len - 1)) {
1862 /*
1863 * If the last message, set the AutoSCSI restart
1864 * before send back the ack message. AutoSCSI
1865 * restart automatically negate ATN signal.
1866 */
1867 //command = (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
1868 //nsp32_restart_autoscsi(SCpnt, command);
1869 nsp32_write2(base, COMMAND_CONTROL,
1870 (CLEAR_CDB_FIFO_POINTER |
1871 AUTO_COMMAND_PHASE |
1872 AUTOSCSI_RESTART |
1873 AUTO_MSGIN_00_OR_04 |
1874 AUTO_MSGIN_02 ));
1875 }
1876 /*
1877 * Write data with SACK, then wait sack is
1878 * automatically negated.
1879 */
1880 nsp32_write1(base, SCSI_DATA_WITH_ACK, data->msgoutbuf[i]);
1881 nsp32_wait_sack(data, NEGATE);
1882
1883 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "bus: 0x%x\n",
1884 nsp32_read1(base, SCSI_BUS_MONITOR));
1885 };
1886
1887 data->msgout_len = 0;
1888
1889 nsp32_dbg(NSP32_DEBUG_MSGOUTOCCUR, "exit");
1890}
1891
1892/*
1893 * Restart AutoSCSI
1894 *
1895 * Note: Restarting AutoSCSI needs set:
1896 * SYNC_REG, ACK_WIDTH, SGT_ADR, TRANSFER_CONTROL
1897 */
1898static void nsp32_restart_autoscsi(struct scsi_cmnd *SCpnt, unsigned short command)
1899{
1900 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1901 unsigned int base = data->BaseAddress;
1902 unsigned short transfer = 0;
1903
1904 nsp32_dbg(NSP32_DEBUG_RESTART, "enter");
1905
1906 if (data->cur_target == NULL || data->cur_lunt == NULL) {
1907 nsp32_msg(KERN_ERR, "Target or Lun is invalid");
1908 }
1909
1910 /*
1911 * set SYNC_REG
1912 * Don't set BM_START_ADR before setting this register.
1913 */
1914 nsp32_write1(base, SYNC_REG, data->cur_target->syncreg);
1915
1916 /*
1917 * set ACKWIDTH
1918 */
1919 nsp32_write1(base, ACK_WIDTH, data->cur_target->ackwidth);
1920
1921 /*
1922 * set SREQ hazard killer sampling rate
1923 */
1924 nsp32_write1(base, SREQ_SMPL_RATE, data->cur_target->sample_reg);
1925
1926 /*
1927 * set SGT ADDR (physical address)
1928 */
1929 nsp32_write4(base, SGT_ADR, data->cur_lunt->sglun_paddr);
1930
1931 /*
1932 * set TRANSFER CONTROL REG
1933 */
1934 transfer = 0;
1935 transfer |= (TRANSFER_GO | ALL_COUNTER_CLR);
1936 if (data->trans_method & NSP32_TRANSFER_BUSMASTER) {
2e917246 1937 if (scsi_bufflen(SCpnt) > 0) {
1da177e4
LT		 1938 transfer |= BM_START;
1939 }
1940 } else if (data->trans_method & NSP32_TRANSFER_MMIO) {
1941 transfer |= CB_MMIO_MODE;
1942 } else if (data->trans_method & NSP32_TRANSFER_PIO) {
1943 transfer |= CB_IO_MODE;
1944 }
1945 nsp32_write2(base, TRANSFER_CONTROL, transfer);
1946
1947 /*
1948 * restart AutoSCSI
1949 *
1950 * TODO: COMMANDCONTROL_AUTO_COMMAND_PHASE is needed ?
1951 */
1952 command |= (CLEAR_CDB_FIFO_POINTER |
1953 AUTO_COMMAND_PHASE |
1954 AUTOSCSI_RESTART );
1955 nsp32_write2(base, COMMAND_CONTROL, command);
1956
1957 nsp32_dbg(NSP32_DEBUG_RESTART, "exit");
1958}
1959
1960
1961/*
1962 * cannot run automatically message in occur
1963 */
1964static void nsp32_msgin_occur(struct scsi_cmnd *SCpnt,
1965 unsigned long irq_status,
1966 unsigned short execph)
1967{
1968 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
1969 unsigned int base = SCpnt->device->host->io_port;
1970 unsigned char msg;
1971 unsigned char msgtype;
1972 unsigned char newlun;
1973 unsigned short command = 0;
1974 int msgclear = TRUE;
1975 long new_sgtp;
1976 int ret;
1977
1978 /*
1979 * read first message
1980 * Use SCSIDATA_W_ACK instead of SCSIDATAIN, because the procedure
1981 * of Message-In have to be processed before sending back SCSI ACK.
1982 */
1983 msg = nsp32_read1(base, SCSI_DATA_IN);
1984 data->msginbuf[(unsigned char)data->msgin_len] = msg;
1985 msgtype = data->msginbuf[0];
1986 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR,
1987 "enter: msglen: 0x%x msgin: 0x%x msgtype: 0x%x",
1988 data->msgin_len, msg, msgtype);
1989
1990 /*
1991 * TODO: We need checking whether bus phase is message in?
1992 */
1993
1994 /*
1995 * assert SCSI ACK
1996 */
1997 nsp32_sack_assert(data);
1998
1999 /*
2000 * processing IDENTIFY
2001 */
2002 if (msgtype & 0x80) {
2003 if (!(irq_status & IRQSTATUS_RESELECT_OCCUER)) {
2004 /* Invalid (non reselect) phase */
2005 goto reject;
2006 }
2007
2008 newlun = msgtype & 0x1f; /* TODO: SPI-3 compliant? */
2009 ret = nsp32_reselection(SCpnt, newlun);
2010 if (ret == TRUE) {
2011 goto restart;
2012 } else {
2013 goto reject;
2014 }
2015 }
2016
2017 /*
2018 * processing messages except for IDENTIFY
2019 *
2020 * TODO: Messages are all SCSI-2 terminology. SCSI-3 compliance is TODO.
2021 */
2022 switch (msgtype) {
2023 /*
2024 * 1-byte message
2025 */
2026 case COMMAND_COMPLETE:
2027 case DISCONNECT:
2028 /*
2029 * These messages should not be occurred.
2030 * They should be processed on AutoSCSI sequencer.
2031 */
2032 nsp32_msg(KERN_WARNING,
2033 "unexpected message of AutoSCSI MsgIn: 0x%x", msg);
2034 break;
2035
2036 case RESTORE_POINTERS:
2037 /*
2038 * AutoMsgIn03 is disabled, and HBA gets this message.
2039 */
2040
2041 if ((execph & DATA_IN_PHASE) || (execph & DATA_OUT_PHASE)) {
2042 unsigned int s_sacklen;
2043
2044 s_sacklen = nsp32_read4(base, SAVED_SACK_CNT);
2045 if ((execph & MSGIN_02_VALID) && (s_sacklen > 0)) {
2046 nsp32_adjust_busfree(SCpnt, s_sacklen);
2047 } else {
2048 /* No need to rewrite SGT */
2049 }
2050 }
2051 data->cur_lunt->msgin03 = FALSE;
2052
2053 /* Update with the new value */
2054
2055 /* reset SACK/SavedACK counter (or ALL clear?) */
2056 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
2057
2058 /*
2059 * set new sg pointer
2060 */
2061 new_sgtp = data->cur_lunt->sglun_paddr +
2062 (data->cur_lunt->cur_entry * sizeof(nsp32_sgtable));
2063 nsp32_write4(base, SGT_ADR, new_sgtp);
2064
2065 break;
2066
2067 case SAVE_POINTERS:
2068 /*
2069 * These messages should not be occurred.
2070 * They should be processed on AutoSCSI sequencer.
2071 */
2072 nsp32_msg (KERN_WARNING,
2073 "unexpected message of AutoSCSI MsgIn: SAVE_POINTERS");
2074
2075 break;
2076
2077 case MESSAGE_REJECT:
2078 /* If previous message_out is sending SDTR, and get
2079 message_reject from target, SDTR negotiation is failed */
2080 if (data->cur_target->sync_flag &
2081 (SDTR_INITIATOR | SDTR_TARGET)) {
2082 /*
2083 * Current target is negotiating SDTR, but it's
2084 * failed. Fall back to async transfer mode, and set
2085 * SDTR_DONE.
2086 */
2087 nsp32_set_async(data, data->cur_target);
2088 data->cur_target->sync_flag &= ~SDTR_INITIATOR;
2089 data->cur_target->sync_flag |= SDTR_DONE;
2090
2091 }
2092 break;
2093
2094 case LINKED_CMD_COMPLETE:
2095 case LINKED_FLG_CMD_COMPLETE:
2096 /* queue tag is not supported currently */
2097 nsp32_msg (KERN_WARNING,
2098 "unsupported message: 0x%x", msgtype);
2099 break;
2100
2101 case INITIATE_RECOVERY:
2102 /* staring ECA (Extended Contingent Allegiance) state. */
2103 /* This message is declined in SPI2 or later. */
2104
2105 goto reject;
2106
2107 /*
2108 * 2-byte message
2109 */
2110 case SIMPLE_QUEUE_TAG:
2111 case 0x23:
2112 /*
2113 * 0x23: Ignore_Wide_Residue is not declared in scsi.h.
2114 * No support is needed.
2115 */
2116 if (data->msgin_len >= 1) {
2117 goto reject;
2118 }
2119
2120 /* current position is 1-byte of 2 byte */
2121 msgclear = FALSE;
2122
2123 break;
2124
2125 /*
2126 * extended message
2127 */
2128 case EXTENDED_MESSAGE:
2129 if (data->msgin_len < 1) {
2130 /*
2131 * Current position does not reach 2-byte
2132 * (2-byte is extended message length).
2133 */
2134 msgclear = FALSE;
2135 break;
2136 }
2137
2138 if ((data->msginbuf[1] + 1) > data->msgin_len) {
2139 /*
2140 * Current extended message has msginbuf[1] + 2
2141 * (msgin_len starts counting from 0, so buf[1] + 1).
2142 * If current message position is not finished,
2143 * continue receiving message.
2144 */
2145 msgclear = FALSE;
2146 break;
2147 }
2148
2149 /*
2150 * Reach here means regular length of each type of
2151 * extended messages.
2152 */
2153 switch (data->msginbuf[2]) {
2154 case EXTENDED_MODIFY_DATA_POINTER:
2155 /* TODO */
2156 goto reject; /* not implemented yet */
2157 break;
2158
2159 case EXTENDED_SDTR:
2160 /*
2161 * Exchange this message between initiator and target.
2162 */
2163 if (data->msgin_len != EXTENDED_SDTR_LEN + 1) {
2164 /*
2165 * received inappropriate message.
2166 */
2167 goto reject;
2168 break;
2169 }
2170
2171 nsp32_analyze_sdtr(SCpnt);
2172
2173 break;
2174
2175 case EXTENDED_EXTENDED_IDENTIFY:
2176 /* SCSI-I only, not supported. */
2177 goto reject; /* not implemented yet */
2178
2179 break;
2180
2181 case EXTENDED_WDTR:
2182 goto reject; /* not implemented yet */
2183
2184 break;
2185
2186 default:
2187 goto reject;
2188 }
2189 break;
2190
2191 default:
2192 goto reject;
2193 }
2194
2195 restart:
2196 if (msgclear == TRUE) {
2197 data->msgin_len = 0;
2198
2199 /*
2200 * If restarting AutoSCSI, but there are some message to out
2201 * (msgout_len > 0), set AutoATN, and set SCSIMSGOUT as 0
2202 * (MV_VALID = 0). When commandcontrol is written with
2203 * AutoSCSI restart, at the same time MsgOutOccur should be
2204 * happened (however, such situation is really possible...?).
2205 */
2206 if (data->msgout_len > 0) {
2207 nsp32_write4(base, SCSI_MSG_OUT, 0);
2208 command |= AUTO_ATN;
2209 }
2210
2211 /*
2212 * restart AutoSCSI
2213 * If it's failed, COMMANDCONTROL_AUTO_COMMAND_PHASE is needed.
2214 */
2215 command |= (AUTO_MSGIN_00_OR_04 | AUTO_MSGIN_02);
2216
2217 /*
2218 * If current msgin03 is TRUE, then flag on.
2219 */
2220 if (data->cur_lunt->msgin03 == TRUE) {
2221 command |= AUTO_MSGIN_03;
2222 }
2223 data->cur_lunt->msgin03 = FALSE;
2224 } else {
2225 data->msgin_len++;
2226 }
2227
2228 /*
2229 * restart AutoSCSI
2230 */
2231 nsp32_restart_autoscsi(SCpnt, command);
2232
2233 /*
2234 * wait SCSI REQ negate for REQ-ACK handshake
2235 */
2236 nsp32_wait_req(data, NEGATE);
2237
2238 /*
2239 * negate SCSI ACK
2240 */
2241 nsp32_sack_negate(data);
2242
2243 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2244
2245 return;
2246
2247 reject:
2248 nsp32_msg(KERN_WARNING,
2249 "invalid or unsupported MessageIn, rejected. "
2250 "current msg: 0x%x (len: 0x%x), processing msg: 0x%x",
2251 msg, data->msgin_len, msgtype);
2252 nsp32_build_reject(SCpnt);
2253 data->msgin_len = 0;
2254
2255 goto restart;
2256}
2257
2258/*
2259 *
2260 */
2261static void nsp32_analyze_sdtr(struct scsi_cmnd *SCpnt)
2262{
2263 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2264 nsp32_target *target = data->cur_target;
2265 nsp32_sync_table *synct;
2266 unsigned char get_period = data->msginbuf[3];
2267 unsigned char get_offset = data->msginbuf[4];
2268 int entry;
2269 int syncnum;
2270
2271 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "enter");
2272
2273 synct = data->synct;
2274 syncnum = data->syncnum;
2275
2276 /*
2277 * If this inititor sent the SDTR message, then target responds SDTR,
2278 * initiator SYNCREG, ACKWIDTH from SDTR parameter.
2279 * Messages are not appropriate, then send back reject message.
2280 * If initiator did not send the SDTR, but target sends SDTR,
2281 * initiator calculator the appropriate parameter and send back SDTR.
2282 */
2283 if (target->sync_flag & SDTR_INITIATOR) {
2284 /*
2285 * Initiator sent SDTR, the target responds and
2286 * send back negotiation SDTR.
2287 */
2288 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target responds SDTR");
2289
2290 target->sync_flag &= ~SDTR_INITIATOR;
2291 target->sync_flag |= SDTR_DONE;
2292
2293 /*
2294 * offset:
2295 */
2296 if (get_offset > SYNC_OFFSET) {
2297 /*
2298 * Negotiation is failed, the target send back
2299 * unexpected offset value.
2300 */
2301 goto reject;
2302 }
2303
2304 if (get_offset == ASYNC_OFFSET) {
2305 /*
2306 * Negotiation is succeeded, the target want
2307 * to fall back into asynchronous transfer mode.
2308 */
2309 goto async;
2310 }
2311
2312 /*
2313 * period:
2314 * Check whether sync period is too short. If too short,
2315 * fall back to async mode. If it's ok, then investigate
2316 * the received sync period. If sync period is acceptable
2317 * between sync table start_period and end_period, then
2318 * set this I_T nexus as sent offset and period.
2319 * If it's not acceptable, send back reject and fall back
2320 * to async mode.
2321 */
2322 if (get_period < data->synct[0].period_num) {
2323 /*
2324 * Negotiation is failed, the target send back
2325 * unexpected period value.
2326 */
2327 goto reject;
2328 }
2329
2330 entry = nsp32_search_period_entry(data, target, get_period);
2331
2332 if (entry < 0) {
2333 /*
2334 * Target want to use long period which is not
2335 * acceptable NinjaSCSI-32Bi/UDE.
2336 */
2337 goto reject;
2338 }
2339
2340 /*
2341 * Set new sync table and offset in this I_T nexus.
2342 */
2343 nsp32_set_sync_entry(data, target, entry, get_offset);
2344 } else {
2345 /* Target send SDTR to initiator. */
2346 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "target send SDTR");
2347
2348 target->sync_flag |= SDTR_INITIATOR;
2349
2350 /* offset: */
2351 if (get_offset > SYNC_OFFSET) {
2352 /* send back as SYNC_OFFSET */
2353 get_offset = SYNC_OFFSET;
2354 }
2355
2356 /* period: */
2357 if (get_period < data->synct[0].period_num) {
2358 get_period = data->synct[0].period_num;
2359 }
2360
2361 entry = nsp32_search_period_entry(data, target, get_period);
2362
2363 if (get_offset == ASYNC_OFFSET || entry < 0) {
2364 nsp32_set_async(data, target);
2365 nsp32_build_sdtr(SCpnt, 0, ASYNC_OFFSET);
2366 } else {
2367 nsp32_set_sync_entry(data, target, entry, get_offset);
2368 nsp32_build_sdtr(SCpnt, get_period, get_offset);
2369 }
2370 }
2371
2372 target->period = get_period;
2373 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit");
2374 return;
2375
2376 reject:
2377 /*
2378 * If the current message is unacceptable, send back to the target
2379 * with reject message.
2380 */
2381 nsp32_build_reject(SCpnt);
2382
2383 async:
2384 nsp32_set_async(data, target); /* set as ASYNC transfer mode */
2385
2386 target->period = 0;
2387 nsp32_dbg(NSP32_DEBUG_MSGINOCCUR, "exit: set async");
2388 return;
2389}
2390
2391
2392/*
2393 * Search config entry number matched in sync_table from given
2394 * target and speed period value. If failed to search, return negative value.
2395 */
2396static int nsp32_search_period_entry(nsp32_hw_data *data,
2397 nsp32_target *target,
2398 unsigned char period)
2399{
2400 int i;
2401
2402 if (target->limit_entry >= data->syncnum) {
2403 nsp32_msg(KERN_ERR, "limit_entry exceeds syncnum!");
2404 target->limit_entry = 0;
2405 }
2406
2407 for (i = target->limit_entry; i < data->syncnum; i++) {
2408 if (period >= data->synct[i].start_period &&
2409 period <= data->synct[i].end_period) {
2410 break;
2411 }
2412 }
2413
2414 /*
2415 * Check given period value is over the sync_table value.
2416 * If so, return max value.
2417 */
2418 if (i == data->syncnum) {
2419 i = -1;
2420 }
2421
2422 return i;
2423}
2424
2425
2426/*
2427 * target <-> initiator use ASYNC transfer
2428 */
2429static void nsp32_set_async(nsp32_hw_data *data, nsp32_target *target)
2430{
2431 unsigned char period = data->synct[target->limit_entry].period_num;
2432
2433 target->offset = ASYNC_OFFSET;
2434 target->period = 0;
2435 target->syncreg = TO_SYNCREG(period, ASYNC_OFFSET);
2436 target->ackwidth = 0;
2437 target->sample_reg = 0;
2438
2439 nsp32_dbg(NSP32_DEBUG_SYNC, "set async");
2440}
2441
2442
2443/*
2444 * target <-> initiator use maximum SYNC transfer
2445 */
2446static void nsp32_set_max_sync(nsp32_hw_data *data,
2447 nsp32_target *target,
2448 unsigned char *period,
2449 unsigned char *offset)
2450{
2451 unsigned char period_num, ackwidth;
2452
2453 period_num = data->synct[target->limit_entry].period_num;
2454 *period = data->synct[target->limit_entry].start_period;
2455 ackwidth = data->synct[target->limit_entry].ackwidth;
2456 *offset = SYNC_OFFSET;
2457
2458 target->syncreg = TO_SYNCREG(period_num, *offset);
2459 target->ackwidth = ackwidth;
2460 target->offset = *offset;
2461 target->sample_reg = 0; /* disable SREQ sampling */
2462}
2463
2464
2465/*
2466 * target <-> initiator use entry number speed
2467 */
2468static void nsp32_set_sync_entry(nsp32_hw_data *data,
2469 nsp32_target *target,
2470 int entry,
2471 unsigned char offset)
2472{
2473 unsigned char period, ackwidth, sample_rate;
2474
2475 period = data->synct[entry].period_num;
2476 ackwidth = data->synct[entry].ackwidth;
2477 offset = offset;
2478 sample_rate = data->synct[entry].sample_rate;
2479
2480 target->syncreg = TO_SYNCREG(period, offset);
2481 target->ackwidth = ackwidth;
2482 target->offset = offset;
2483 target->sample_reg = sample_rate | SAMPLING_ENABLE;
2484
2485 nsp32_dbg(NSP32_DEBUG_SYNC, "set sync");
2486}
2487
2488
2489/*
2490 * It waits until SCSI REQ becomes assertion or negation state.
2491 *
2492 * Note: If nsp32_msgin_occur is called, we asserts SCSI ACK. Then
2493 * connected target responds SCSI REQ negation. We have to wait
2494 * SCSI REQ becomes negation in order to negate SCSI ACK signal for
2495 * REQ-ACK handshake.
2496 */
2497static void nsp32_wait_req(nsp32_hw_data *data, int state)
2498{
2499 unsigned int base = data->BaseAddress;
2500 int wait_time = 0;
2501 unsigned char bus, req_bit;
2502
2503 if (!((state == ASSERT) || (state == NEGATE))) {
2504 nsp32_msg(KERN_ERR, "unknown state designation");
2505 }
2506 /* REQ is BIT(5) */
2507 req_bit = (state == ASSERT ? BUSMON_REQ : 0);
2508
2509 do {
2510 bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2511 if ((bus & BUSMON_REQ) == req_bit) {
2512 nsp32_dbg(NSP32_DEBUG_WAIT,
2513 "wait_time: %d", wait_time);
2514 return;
2515 }
2516 udelay(1);
2517 wait_time++;
2518 } while (wait_time < REQSACK_TIMEOUT_TIME);
2519
2520 nsp32_msg(KERN_WARNING, "wait REQ timeout, req_bit: 0x%x", req_bit);
2521}
2522
2523/*
2524 * It waits until SCSI SACK becomes assertion or negation state.
2525 */
2526static void nsp32_wait_sack(nsp32_hw_data *data, int state)
2527{
2528 unsigned int base = data->BaseAddress;
2529 int wait_time = 0;
2530 unsigned char bus, ack_bit;
2531
2532 if (!((state == ASSERT) || (state == NEGATE))) {
2533 nsp32_msg(KERN_ERR, "unknown state designation");
2534 }
2535 /* ACK is BIT(4) */
2536 ack_bit = (state == ASSERT ? BUSMON_ACK : 0);
2537
2538 do {
2539 bus = nsp32_read1(base, SCSI_BUS_MONITOR);
2540 if ((bus & BUSMON_ACK) == ack_bit) {
2541 nsp32_dbg(NSP32_DEBUG_WAIT,
2542 "wait_time: %d", wait_time);
2543 return;
2544 }
2545 udelay(1);
2546 wait_time++;
2547 } while (wait_time < REQSACK_TIMEOUT_TIME);
2548
2549 nsp32_msg(KERN_WARNING, "wait SACK timeout, ack_bit: 0x%x", ack_bit);
2550}
2551
2552/*
2553 * assert SCSI ACK
2554 *
2555 * Note: SCSI ACK assertion needs with ACKENB=1, AUTODIRECTION=1.
2556 */
2557static void nsp32_sack_assert(nsp32_hw_data *data)
2558{
2559 unsigned int base = data->BaseAddress;
2560 unsigned char busctrl;
2561
2562 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL);
2563 busctrl |= (BUSCTL_ACK | AUTODIRECTION | ACKENB);
2564 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2565}
2566
2567/*
2568 * negate SCSI ACK
2569 */
2570static void nsp32_sack_negate(nsp32_hw_data *data)
2571{
2572 unsigned int base = data->BaseAddress;
2573 unsigned char busctrl;
2574
2575 busctrl = nsp32_read1(base, SCSI_BUS_CONTROL);
2576 busctrl &= ~BUSCTL_ACK;
2577 nsp32_write1(base, SCSI_BUS_CONTROL, busctrl);
2578}
2579
2580
2581
2582/*
2583 * Note: n_io_port is defined as 0x7f because I/O register port is
2584 * assigned as:
2585 * 0x800-0x8ff: memory mapped I/O port
2586 * 0x900-0xbff: (map same 0x800-0x8ff I/O port image repeatedly)
2587 * 0xc00-0xfff: CardBus status registers
2588 */
1da177e4 2589static int nsp32_detect(struct pci_dev *pdev)
1da177e4
LT		 2590{
2591 struct Scsi_Host *host; /* registered host structure */
2592 struct resource *res;
2593 nsp32_hw_data *data;
2594 int ret;
2595 int i, j;
2596
2597 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
2598
2599 /*
2600 * register this HBA as SCSI device
2601 */
1da177e4 2602 host = scsi_host_alloc(&nsp32_template, sizeof(nsp32_hw_data));
1da177e4
LT		 2603 if (host == NULL) {
2604 nsp32_msg (KERN_ERR, "failed to scsi register");
2605 goto err;
2606 }
2607
2608 /*
2609 * set nsp32_hw_data
2610 */
2611 data = (nsp32_hw_data *)host->hostdata;
2612
2613 memcpy(data, &nsp32_data_base, sizeof(nsp32_hw_data));
2614
2615 host->irq = data->IrqNumber;
2616 host->io_port = data->BaseAddress;
2617 host->unique_id = data->BaseAddress;
2618 host->n_io_port = data->NumAddress;
2619 host->base = (unsigned long)data->MmioAddress;
1da177e4
LT		 2620
2621 data->Host = host;
2622 spin_lock_init(&(data->Lock));
2623
2624 data->cur_lunt = NULL;
2625 data->cur_target = NULL;
2626
2627 /*
2628 * Bus master transfer mode is supported currently.
2629 */
2630 data->trans_method = NSP32_TRANSFER_BUSMASTER;
2631
2632 /*
2633 * Set clock div, CLOCK_4 (HBA has own external clock, and
2634 * dividing * 100ns/4).
2635 * Currently CLOCK_4 has only tested, not for CLOCK_2/PCICLK yet.
2636 */
2637 data->clock = CLOCK_4;
2638
2639 /*
2640 * Select appropriate nsp32_sync_table and set I_CLOCKDIV.
2641 */
2642 switch (data->clock) {
2643 case CLOCK_4:
2644 /* If data->clock is CLOCK_4, then select 40M sync table. */
2645 data->synct = nsp32_sync_table_40M;
2646 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2647 break;
2648 case CLOCK_2:
2649 /* If data->clock is CLOCK_2, then select 20M sync table. */
2650 data->synct = nsp32_sync_table_20M;
2651 data->syncnum = ARRAY_SIZE(nsp32_sync_table_20M);
2652 break;
2653 case PCICLK:
2654 /* If data->clock is PCICLK, then select pci sync table. */
2655 data->synct = nsp32_sync_table_pci;
2656 data->syncnum = ARRAY_SIZE(nsp32_sync_table_pci);
2657 break;
2658 default:
2659 nsp32_msg(KERN_WARNING,
2660 "Invalid clock div is selected, set CLOCK_4.");
2661 /* Use default value CLOCK_4 */
2662 data->clock = CLOCK_4;
2663 data->synct = nsp32_sync_table_40M;
2664 data->syncnum = ARRAY_SIZE(nsp32_sync_table_40M);
2665 }
2666
2667 /*
2668 * setup nsp32_lunt
2669 */
2670
2671 /*
2672 * setup DMA
2673 */
284901a9 2674 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) {
1da177e4
LT		 2675 nsp32_msg (KERN_ERR, "failed to set PCI DMA mask");
2676 goto scsi_unregister;
2677 }
2678
2679 /*
2680 * allocate autoparam DMA resource.
2681 */
6a31a8a6 2682 data->autoparam = pci_alloc_consistent(pdev, sizeof(nsp32_autoparam), &(data->auto_paddr));
1da177e4
LT		 2683 if (data->autoparam == NULL) {
2684 nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2685 goto scsi_unregister;
2686 }
2687
2688 /*
2689 * allocate scatter-gather DMA resource.
2690 */
6a31a8a6 2691 data->sg_list = pci_alloc_consistent(pdev, NSP32_SG_TABLE_SIZE,
1da177e4
LT		 2692 &(data->sg_paddr));
2693 if (data->sg_list == NULL) {
2694 nsp32_msg(KERN_ERR, "failed to allocate DMA memory");
2695 goto free_autoparam;
2696 }
2697
2698 for (i = 0; i < ARRAY_SIZE(data->lunt); i++) {
2699 for (j = 0; j < ARRAY_SIZE(data->lunt[0]); j++) {
2700 int offset = i * ARRAY_SIZE(data->lunt[0]) + j;
2701 nsp32_lunt tmp = {
2702 .SCpnt = NULL,
2703 .save_datp = 0,
2704 .msgin03 = FALSE,
2705 .sg_num = 0,
2706 .cur_entry = 0,
2707 .sglun = &(data->sg_list[offset]),
2708 .sglun_paddr = data->sg_paddr + (offset * sizeof(nsp32_sglun)),
2709 };
2710
2711 data->lunt[i][j] = tmp;
2712 }
2713 }
2714
2715 /*
2716 * setup target
2717 */
2718 for (i = 0; i < ARRAY_SIZE(data->target); i++) {
2719 nsp32_target *target = &(data->target[i]);
2720
2721 target->limit_entry = 0;
2722 target->sync_flag = 0;
2723 nsp32_set_async(data, target);
2724 }
2725
2726 /*
2727 * EEPROM check
2728 */
2729 ret = nsp32_getprom_param(data);
2730 if (ret == FALSE) {
2731 data->resettime = 3; /* default 3 */
2732 }
2733
2734 /*
2735 * setup HBA
2736 */
2737 nsp32hw_init(data);
2738
2739 snprintf(data->info_str, sizeof(data->info_str),
2740 "NinjaSCSI-32Bi/UDE: irq %d, io 0x%lx+0x%x",
2741 host->irq, host->io_port, host->n_io_port);
2742
2743 /*
2744 * SCSI bus reset
2745 *
2746 * Note: It's important to reset SCSI bus in initialization phase.
2747 * NinjaSCSI-32Bi/UDE HBA EEPROM seems to exchange SDTR when
2748 * system is coming up, so SCSI devices connected to HBA is set as
2749 * un-asynchronous mode. It brings the merit that this HBA is
2750 * ready to start synchronous transfer without any preparation,
2751 * but we are difficult to control transfer speed. In addition,
2752 * it prevents device transfer speed from effecting EEPROM start-up
2753 * SDTR. NinjaSCSI-32Bi/UDE has the feature if EEPROM is set as
2754 * Auto Mode, then FAST-10M is selected when SCSI devices are
2755 * connected same or more than 4 devices. It should be avoided
2756 * depending on this specification. Thus, resetting the SCSI bus
2757 * restores all connected SCSI devices to asynchronous mode, then
2758 * this driver set SDTR safely later, and we can control all SCSI
2759 * device transfer mode.
2760 */
2761 nsp32_do_bus_reset(data);
2762
c4e00fac 2763 ret = request_irq(host->irq, do_nsp32_isr, IRQF_SHARED, "nsp32", data);
1da177e4
LT		 2764 if (ret < 0) {
2765 nsp32_msg(KERN_ERR, "Unable to allocate IRQ for NinjaSCSI32 "
2766 "SCSI PCI controller. Interrupt: %d", host->irq);
2767 goto free_sg_list;
2768 }
2769
2770 /*
2771 * PCI IO register
2772 */
2773 res = request_region(host->io_port, host->n_io_port, "nsp32");
2774 if (res == NULL) {
2775 nsp32_msg(KERN_ERR,
2776 "I/O region 0x%lx+0x%lx is already used",
2777 data->BaseAddress, data->NumAddress);
2778 goto free_irq;
2779 }
2780
6a31a8a6 2781 ret = scsi_add_host(host, &pdev->dev);
3e7196cf
GM		 2782 if (ret) {
2783 nsp32_msg(KERN_ERR, "failed to add scsi host");
2784 goto free_region;
2785 }
1da177e4 2786 scsi_scan_host(host);
6a31a8a6
AB		 2787 pci_set_drvdata(pdev, host);
2788 return 0;
1da177e4 2789
3e7196cf
GM		 2790 free_region:
2791 release_region(host->io_port, host->n_io_port);
2792
1da177e4
LT		 2793 free_irq:
2794 free_irq(host->irq, data);
2795
2796 free_sg_list:
6a31a8a6 2797 pci_free_consistent(pdev, NSP32_SG_TABLE_SIZE,
1da177e4
LT		 2798 data->sg_list, data->sg_paddr);
2799
2800 free_autoparam:
6a31a8a6 2801 pci_free_consistent(pdev, sizeof(nsp32_autoparam),
1da177e4
LT		 2802 data->autoparam, data->auto_paddr);
2803
2804 scsi_unregister:
2805 scsi_host_put(host);
2806
2807 err:
6a31a8a6 2808 return 1;
1da177e4 2809}
1da177e4
LT		 2810
2811static int nsp32_release(struct Scsi_Host *host)
2812{
2813 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
2814
2815 if (data->autoparam) {
2816 pci_free_consistent(data->Pci, sizeof(nsp32_autoparam),
2817 data->autoparam, data->auto_paddr);
2818 }
2819
2820 if (data->sg_list) {
2821 pci_free_consistent(data->Pci, NSP32_SG_TABLE_SIZE,
2822 data->sg_list, data->sg_paddr);
2823 }
2824
2825 if (host->irq) {
2826 free_irq(host->irq, data);
2827 }
2828
2829 if (host->io_port && host->n_io_port) {
2830 release_region(host->io_port, host->n_io_port);
2831 }
2832
2833 if (data->MmioAddress) {
2834 iounmap(data->MmioAddress);
2835 }
2836
2837 return 0;
2838}
2839
2840static const char *nsp32_info(struct Scsi_Host *shpnt)
2841{
2842 nsp32_hw_data *data = (nsp32_hw_data *)shpnt->hostdata;
2843
2844 return data->info_str;
2845}
2846
2847
2848/****************************************************************************
2849 * error handler
2850 */
2851static int nsp32_eh_abort(struct scsi_cmnd *SCpnt)
2852{
2853 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2854 unsigned int base = SCpnt->device->host->io_port;
2855
2856 nsp32_msg(KERN_WARNING, "abort");
2857
2858 if (data->cur_lunt->SCpnt == NULL) {
2859 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort failed");
2860 return FAILED;
2861 }
2862
2863 if (data->cur_target->sync_flag & (SDTR_INITIATOR | SDTR_TARGET)) {
2864 /* reset SDTR negotiation */
2865 data->cur_target->sync_flag = 0;
2866 nsp32_set_async(data, data->cur_target);
2867 }
2868
2869 nsp32_write2(base, TRANSFER_CONTROL, 0);
2870 nsp32_write2(base, BM_CNT, 0);
2871
2872 SCpnt->result = DID_ABORT << 16;
2873 nsp32_scsi_done(SCpnt);
2874
2875 nsp32_dbg(NSP32_DEBUG_BUSRESET, "abort success");
2876 return SUCCESS;
2877}
2878
2879static int nsp32_eh_bus_reset(struct scsi_cmnd *SCpnt)
2880{
2881 nsp32_hw_data *data = (nsp32_hw_data *)SCpnt->device->host->hostdata;
2882 unsigned int base = SCpnt->device->host->io_port;
2883
68b3aa7c
JG		 2884 spin_lock_irq(SCpnt->device->host->host_lock);
2885
1da177e4
LT		 2886 nsp32_msg(KERN_INFO, "Bus Reset");
2887 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
2888
2889 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
2890 nsp32_do_bus_reset(data);
2891 nsp32_write2(base, IRQ_CONTROL, 0);
2892
68b3aa7c 2893 spin_unlock_irq(SCpnt->device->host->host_lock);
1da177e4
LT		 2894 return SUCCESS; /* SCSI bus reset is succeeded at any time. */
2895}
2896
2897static void nsp32_do_bus_reset(nsp32_hw_data *data)
2898{
2899 unsigned int base = data->BaseAddress;
2900 unsigned short intrdat;
2901 int i;
2902
2903 nsp32_dbg(NSP32_DEBUG_BUSRESET, "in");
2904
2905 /*
2906 * stop all transfer
2907 * clear TRANSFERCONTROL_BM_START
2908 * clear counter
2909 */
2910 nsp32_write2(base, TRANSFER_CONTROL, 0);
2911 nsp32_write4(base, BM_CNT, 0);
2912 nsp32_write4(base, CLR_COUNTER, CLRCOUNTER_ALLMASK);
2913
2914 /*
2915 * fall back to asynchronous transfer mode
2916 * initialize SDTR negotiation flag
2917 */
2918 for (i = 0; i < ARRAY_SIZE(data->target); i++) {
2919 nsp32_target *target = &data->target[i];
2920
2921 target->sync_flag = 0;
2922 nsp32_set_async(data, target);
2923 }
2924
2925 /*
2926 * reset SCSI bus
2927 */
2928 nsp32_write1(base, SCSI_BUS_CONTROL, BUSCTL_RST);
2929 udelay(RESET_HOLD_TIME);
2930 nsp32_write1(base, SCSI_BUS_CONTROL, 0);
2931 for(i = 0; i < 5; i++) {
2932 intrdat = nsp32_read2(base, IRQ_STATUS); /* dummy read */
2933 nsp32_dbg(NSP32_DEBUG_BUSRESET, "irq:1: 0x%x", intrdat);
2934 }
2935
2936 data->CurrentSC = NULL;
2937}
2938
2939static int nsp32_eh_host_reset(struct scsi_cmnd *SCpnt)
2940{
2941 struct Scsi_Host *host = SCpnt->device->host;
2942 unsigned int base = SCpnt->device->host->io_port;
2943 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
2944
2945 nsp32_msg(KERN_INFO, "Host Reset");
2946 nsp32_dbg(NSP32_DEBUG_BUSRESET, "SCpnt=0x%x", SCpnt);
2947
df0ae249
JG		 2948 spin_lock_irq(SCpnt->device->host->host_lock);
2949
1da177e4
LT		 2950 nsp32hw_init(data);
2951 nsp32_write2(base, IRQ_CONTROL, IRQ_CONTROL_ALL_IRQ_MASK);
2952 nsp32_do_bus_reset(data);
2953 nsp32_write2(base, IRQ_CONTROL, 0);
2954
df0ae249 2955 spin_unlock_irq(SCpnt->device->host->host_lock);
1da177e4
LT		 2956 return SUCCESS; /* Host reset is succeeded at any time. */
2957}
2958
2959
2960/**************************************************************************
2961 * EEPROM handler
2962 */
2963
2964/*
2965 * getting EEPROM parameter
2966 */
2967static int nsp32_getprom_param(nsp32_hw_data *data)
2968{
2969 int vendor = data->pci_devid->vendor;
2970 int device = data->pci_devid->device;
2971 int ret, val, i;
2972
2973 /*
2974 * EEPROM checking.
2975 */
2976 ret = nsp32_prom_read(data, 0x7e);
2977 if (ret != 0x55) {
2978 nsp32_msg(KERN_INFO, "No EEPROM detected: 0x%x", ret);
2979 return FALSE;
2980 }
2981 ret = nsp32_prom_read(data, 0x7f);
2982 if (ret != 0xaa) {
2983 nsp32_msg(KERN_INFO, "Invalid number: 0x%x", ret);
2984 return FALSE;
2985 }
2986
2987 /*
2988 * check EEPROM type
2989 */
2990 if (vendor == PCI_VENDOR_ID_WORKBIT &&
2991 device == PCI_DEVICE_ID_WORKBIT_STANDARD) {
2992 ret = nsp32_getprom_c16(data);
2993 } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
2994 device == PCI_DEVICE_ID_NINJASCSI_32BIB_LOGITEC) {
2995 ret = nsp32_getprom_at24(data);
2996 } else if (vendor == PCI_VENDOR_ID_WORKBIT &&
2997 device == PCI_DEVICE_ID_NINJASCSI_32UDE_MELCO ) {
2998 ret = nsp32_getprom_at24(data);
2999 } else {
3000 nsp32_msg(KERN_WARNING, "Unknown EEPROM");
3001 ret = FALSE;
3002 }
3003
3004 /* for debug : SPROM data full checking */
3005 for (i = 0; i <= 0x1f; i++) {
3006 val = nsp32_prom_read(data, i);
3007 nsp32_dbg(NSP32_DEBUG_EEPROM,
3008 "rom address 0x%x : 0x%x", i, val);
3009 }
3010
3011 return ret;
3012}
3013
3014
3015/*
3016 * AT24C01A (Logitec: LHA-600S), AT24C02 (Melco Buffalo: IFC-USLP) data map:
3017 *
3018 * ROMADDR
3019 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6)
3020 * Value 0x0: ASYNC, 0x0c: Ultra-20M, 0x19: Fast-10M
3021 * 0x07 : HBA Synchronous Transfer Period
3022 * Value 0: AutoSync, 1: Manual Setting
3023 * 0x08 - 0x0f : Not Used? (0x0)
3024 * 0x10 : Bus Termination
3025 * Value 0: Auto[ON], 1: ON, 2: OFF
3026 * 0x11 : Not Used? (0)
3027 * 0x12 : Bus Reset Delay Time (0x03)
3028 * 0x13 : Bootable CD Support
3029 * Value 0: Disable, 1: Enable
3030 * 0x14 : Device Scan
3031 * Bit 7 6 5 4 3 2 1 0
3032 * | <----------------->
3033 * | SCSI ID: Value 0: Skip, 1: YES
3034 * |-> Value 0: ALL scan, Value 1: Manual
3035 * 0x15 - 0x1b : Not Used? (0)
3036 * 0x1c : Constant? (0x01) (clock div?)
3037 * 0x1d - 0x7c : Not Used (0xff)
3038 * 0x7d : Not Used? (0xff)
3039 * 0x7e : Constant (0x55), Validity signature
3040 * 0x7f : Constant (0xaa), Validity signature
3041 */
3042static int nsp32_getprom_at24(nsp32_hw_data *data)
3043{
3044 int ret, i;
3045 int auto_sync;
3046 nsp32_target *target;
3047 int entry;
3048
3049 /*
3050 * Reset time which is designated by EEPROM.
3051 *
3052 * TODO: Not used yet.
3053 */
3054 data->resettime = nsp32_prom_read(data, 0x12);
3055
3056 /*
3057 * HBA Synchronous Transfer Period
3058 *
3059 * Note: auto_sync = 0: auto, 1: manual. Ninja SCSI HBA spec says
3060 * that if auto_sync is 0 (auto), and connected SCSI devices are
3061 * same or lower than 3, then transfer speed is set as ULTRA-20M.
3062 * On the contrary if connected SCSI devices are same or higher
3063 * than 4, then transfer speed is set as FAST-10M.
3064 *
3065 * I break this rule. The number of connected SCSI devices are
3066 * only ignored. If auto_sync is 0 (auto), then transfer speed is
3067 * forced as ULTRA-20M.
3068 */
3069 ret = nsp32_prom_read(data, 0x07);
3070 switch (ret) {
3071 case 0:
3072 auto_sync = TRUE;
3073 break;
3074 case 1:
3075 auto_sync = FALSE;
3076 break;
3077 default:
3078 nsp32_msg(KERN_WARNING,
3079 "Unsupported Auto Sync mode. Fall back to manual mode.");
3080 auto_sync = TRUE;
3081 }
3082
3083 if (trans_mode == ULTRA20M_MODE) {
3084 auto_sync = TRUE;
3085 }
3086
3087 /*
3088 * each device Synchronous Transfer Period
3089 */
3090 for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3091 target = &data->target[i];
3092 if (auto_sync == TRUE) {
3093 target->limit_entry = 0; /* set as ULTRA20M */
3094 } else {
3095 ret = nsp32_prom_read(data, i);
3096 entry = nsp32_search_period_entry(data, target, ret);
3097 if (entry < 0) {
3098 /* search failed... set maximum speed */
3099 entry = 0;
3100 }
3101 target->limit_entry = entry;
3102 }
3103 }
3104
3105 return TRUE;
3106}
3107
3108
3109/*
3110 * C16 110 (I-O Data: SC-NBD) data map:
3111 *
3112 * ROMADDR
3113 * 0x00 - 0x06 : Device Synchronous Transfer Period (SCSI ID 0 - 6)
3114 * Value 0x0: 20MB/S, 0x1: 10MB/S, 0x2: 5MB/S, 0x3: ASYNC
3115 * 0x07 : 0 (HBA Synchronous Transfer Period: Auto Sync)
3116 * 0x08 - 0x0f : Not Used? (0x0)
3117 * 0x10 : Transfer Mode
3118 * Value 0: PIO, 1: Busmater
3119 * 0x11 : Bus Reset Delay Time (0x00-0x20)
3120 * 0x12 : Bus Termination
3121 * Value 0: Disable, 1: Enable
3122 * 0x13 - 0x19 : Disconnection
3123 * Value 0: Disable, 1: Enable
3124 * 0x1a - 0x7c : Not Used? (0)
3125 * 0x7d : Not Used? (0xf8)
3126 * 0x7e : Constant (0x55), Validity signature
3127 * 0x7f : Constant (0xaa), Validity signature
3128 */
3129static int nsp32_getprom_c16(nsp32_hw_data *data)
3130{
3131 int ret, i;
3132 nsp32_target *target;
3133 int entry, val;
3134
3135 /*
3136 * Reset time which is designated by EEPROM.
3137 *
3138 * TODO: Not used yet.
3139 */
3140 data->resettime = nsp32_prom_read(data, 0x11);
3141
3142 /*
3143 * each device Synchronous Transfer Period
3144 */
3145 for (i = 0; i < NSP32_HOST_SCSIID; i++) {
3146 target = &data->target[i];
3147 ret = nsp32_prom_read(data, i);
3148 switch (ret) {
3149 case 0: /* 20MB/s */
3150 val = 0x0c;
3151 break;
3152 case 1: /* 10MB/s */
3153 val = 0x19;
3154 break;
3155 case 2: /* 5MB/s */
3156 val = 0x32;
3157 break;
3158 case 3: /* ASYNC */
3159 val = 0x00;
3160 break;
3161 default: /* default 20MB/s */
3162 val = 0x0c;
3163 break;
3164 }
3165 entry = nsp32_search_period_entry(data, target, val);
3166 if (entry < 0 || trans_mode == ULTRA20M_MODE) {
3167 /* search failed... set maximum speed */
3168 entry = 0;
3169 }
3170 target->limit_entry = entry;
3171 }
3172
3173 return TRUE;
3174}
3175
3176
3177/*
3178 * Atmel AT24C01A (drived in 5V) serial EEPROM routines
3179 */
3180static int nsp32_prom_read(nsp32_hw_data *data, int romaddr)
3181{
3182 int i, val;
3183
3184 /* start condition */
3185 nsp32_prom_start(data);
3186
3187 /* device address */
3188 nsp32_prom_write_bit(data, 1); /* 1 */
3189 nsp32_prom_write_bit(data, 0); /* 0 */
3190 nsp32_prom_write_bit(data, 1); /* 1 */
3191 nsp32_prom_write_bit(data, 0); /* 0 */
3192 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */
3193 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */
3194 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */
3195
3196 /* R/W: W for dummy write */
3197 nsp32_prom_write_bit(data, 0);
3198
3199 /* ack */
3200 nsp32_prom_write_bit(data, 0);
3201
3202 /* word address */
3203 for (i = 7; i >= 0; i--) {
3204 nsp32_prom_write_bit(data, ((romaddr >> i) & 1));
3205 }
3206
3207 /* ack */
3208 nsp32_prom_write_bit(data, 0);
3209
3210 /* start condition */
3211 nsp32_prom_start(data);
3212
3213 /* device address */
3214 nsp32_prom_write_bit(data, 1); /* 1 */
3215 nsp32_prom_write_bit(data, 0); /* 0 */
3216 nsp32_prom_write_bit(data, 1); /* 1 */
3217 nsp32_prom_write_bit(data, 0); /* 0 */
3218 nsp32_prom_write_bit(data, 0); /* A2: 0 (GND) */
3219 nsp32_prom_write_bit(data, 0); /* A1: 0 (GND) */
3220 nsp32_prom_write_bit(data, 0); /* A0: 0 (GND) */
3221
3222 /* R/W: R */
3223 nsp32_prom_write_bit(data, 1);
3224
3225 /* ack */
3226 nsp32_prom_write_bit(data, 0);
3227
3228 /* data... */
3229 val = 0;
3230 for (i = 7; i >= 0; i--) {
3231 val += (nsp32_prom_read_bit(data) << i);
3232 }
3233
3234 /* no ack */
3235 nsp32_prom_write_bit(data, 1);
3236
3237 /* stop condition */
3238 nsp32_prom_stop(data);
3239
3240 return val;
3241}
3242
3243static void nsp32_prom_set(nsp32_hw_data *data, int bit, int val)
3244{
3245 int base = data->BaseAddress;
3246 int tmp;
3247
3248 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL);
3249
3250 if (val == 0) {
3251 tmp &= ~bit;
3252 } else {
3253 tmp |= bit;
3254 }
3255
3256 nsp32_index_write1(base, SERIAL_ROM_CTL, tmp);
3257
3258 udelay(10);
3259}
3260
3261static int nsp32_prom_get(nsp32_hw_data *data, int bit)
3262{
3263 int base = data->BaseAddress;
3264 int tmp, ret;
3265
3266 if (bit != SDA) {
3267 nsp32_msg(KERN_ERR, "return value is not appropriate");
3268 return 0;
3269 }
3270
3271
3272 tmp = nsp32_index_read1(base, SERIAL_ROM_CTL) & bit;
3273
3274 if (tmp == 0) {
3275 ret = 0;
3276 } else {
3277 ret = 1;
3278 }
3279
3280 udelay(10);
3281
3282 return ret;
3283}
3284
3285static void nsp32_prom_start (nsp32_hw_data *data)
3286{
3287 /* start condition */
3288 nsp32_prom_set(data, SCL, 1);
3289 nsp32_prom_set(data, SDA, 1);
3290 nsp32_prom_set(data, ENA, 1); /* output mode */
3291 nsp32_prom_set(data, SDA, 0); /* keeping SCL=1 and transiting
3292 * SDA 1->0 is start condition */
3293 nsp32_prom_set(data, SCL, 0);
3294}
3295
3296static void nsp32_prom_stop (nsp32_hw_data *data)
3297{
3298 /* stop condition */
3299 nsp32_prom_set(data, SCL, 1);
3300 nsp32_prom_set(data, SDA, 0);
3301 nsp32_prom_set(data, ENA, 1); /* output mode */
3302 nsp32_prom_set(data, SDA, 1);
3303 nsp32_prom_set(data, SCL, 0);
3304}
3305
3306static void nsp32_prom_write_bit(nsp32_hw_data *data, int val)
3307{
3308 /* write */
3309 nsp32_prom_set(data, SDA, val);
3310 nsp32_prom_set(data, SCL, 1 );
3311 nsp32_prom_set(data, SCL, 0 );
3312}
3313
3314static int nsp32_prom_read_bit(nsp32_hw_data *data)
3315{
3316 int val;
3317
3318 /* read */
3319 nsp32_prom_set(data, ENA, 0); /* input mode */
3320 nsp32_prom_set(data, SCL, 1);
3321
3322 val = nsp32_prom_get(data, SDA);
3323
3324 nsp32_prom_set(data, SCL, 0);
3325 nsp32_prom_set(data, ENA, 1); /* output mode */
3326
3327 return val;
3328}
3329
3330
3331/**************************************************************************
3332 * Power Management
3333 */
3334#ifdef CONFIG_PM
3335
3336/* Device suspended */
e5378ca8 3337static int nsp32_suspend(struct pci_dev *pdev, pm_message_t state)
1da177e4
LT		 3338{
3339 struct Scsi_Host *host = pci_get_drvdata(pdev);
3340
3341 nsp32_msg(KERN_INFO, "pci-suspend: pdev=0x%p, state=%ld, slot=%s, host=0x%p", pdev, state, pci_name(pdev), host);
3342
3343 pci_save_state (pdev);
3344 pci_disable_device (pdev);
e5378ca8 3345 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1da177e4
LT		 3346
3347 return 0;
3348}
3349
3350/* Device woken up */
3351static int nsp32_resume(struct pci_dev *pdev)
3352{
3353 struct Scsi_Host *host = pci_get_drvdata(pdev);
3354 nsp32_hw_data *data = (nsp32_hw_data *)host->hostdata;
3355 unsigned short reg;
3356
3357 nsp32_msg(KERN_INFO, "pci-resume: pdev=0x%p, slot=%s, host=0x%p", pdev, pci_name(pdev), host);
3358
e5378ca8
PM		 3359 pci_set_power_state(pdev, PCI_D0);
3360 pci_enable_wake (pdev, PCI_D0, 0);
1da177e4
LT		 3361 pci_restore_state (pdev);
3362
3363 reg = nsp32_read2(data->BaseAddress, INDEX_REG);
3364
3365 nsp32_msg(KERN_INFO, "io=0x%x reg=0x%x", data->BaseAddress, reg);
3366
3367 if (reg == 0xffff) {
3368 nsp32_msg(KERN_INFO, "missing device. abort resume.");
3369 return 0;
3370 }
3371
3372 nsp32hw_init (data);
3373 nsp32_do_bus_reset(data);
3374
3375 nsp32_msg(KERN_INFO, "resume success");
3376
3377 return 0;
3378}
3379
1da177e4
LT		 3380#endif
3381
3382/************************************************************************
3383 * PCI/Cardbus probe/remove routine
3384 */
3385static int __devinit nsp32_probe(struct pci_dev *pdev, const struct pci_device_id *id)
3386{
3387 int ret;
3388 nsp32_hw_data *data = &nsp32_data_base;
3389
3390 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
3391
3392 ret = pci_enable_device(pdev);
3393 if (ret) {
3394 nsp32_msg(KERN_ERR, "failed to enable pci device");
3395 return ret;
3396 }
3397
3398 data->Pci = pdev;
3399 data->pci_devid = id;
3400 data->IrqNumber = pdev->irq;
3401 data->BaseAddress = pci_resource_start(pdev, 0);
3402 data->NumAddress = pci_resource_len (pdev, 0);
25729a7f 3403 data->MmioAddress = pci_ioremap_bar(pdev, 1);
1da177e4
LT		 3404 data->MmioLength = pci_resource_len (pdev, 1);
3405
3406 pci_set_master(pdev);
3407
1da177e4 3408 ret = nsp32_detect(pdev);
1da177e4
LT		 3409
3410 nsp32_msg(KERN_INFO, "irq: %i mmio: %p+0x%lx slot: %s model: %s",
3411 pdev->irq,
3412 data->MmioAddress, data->MmioLength,
3413 pci_name(pdev),
3414 nsp32_model[id->driver_data]);
3415
3416 nsp32_dbg(NSP32_DEBUG_REGISTER, "exit %d", ret);
3417
3418 return ret;
3419}
3420
3421static void __devexit nsp32_remove(struct pci_dev *pdev)
3422{
1da177e4 3423 struct Scsi_Host *host = pci_get_drvdata(pdev);
1da177e4
LT		 3424
3425 nsp32_dbg(NSP32_DEBUG_REGISTER, "enter");
3426
1da177e4
LT		 3427 scsi_remove_host(host);
3428
3429 nsp32_release(host);
3430
3431 scsi_host_put(host);
1da177e4
LT		 3432}
3433
1da177e4
LT		 3434static struct pci_driver nsp32_driver = {
3435 .name = "nsp32",
3436 .id_table = nsp32_pci_table,
3437 .probe = nsp32_probe,
3438 .remove = __devexit_p(nsp32_remove),
3439#ifdef CONFIG_PM
3440 .suspend = nsp32_suspend,
3441 .resume = nsp32_resume,
1da177e4
LT		 3442#endif
3443};
3444
3445/*********************************************************************
3446 * Moule entry point
3447 */
3448static int __init init_nsp32(void) {
3449 nsp32_msg(KERN_INFO, "loading...");
dcbccbde 3450 return pci_register_driver(&nsp32_driver);
1da177e4
LT		 3451}
3452
3453static void __exit exit_nsp32(void) {
3454 nsp32_msg(KERN_INFO, "unloading...");
3455 pci_unregister_driver(&nsp32_driver);
3456}
3457
3458module_init(init_nsp32);
3459module_exit(exit_nsp32);
3460
3461/* end */
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