blob: 57d9a9a79a6f845842a9b1baeb7d20254754dda8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat <alan@redhat.com>
4 *
5 */
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/module.h>
8#include <linux/types.h>
9#include <linux/string.h>
10#include <linux/kernel.h>
11#include <linux/timer.h>
12#include <linux/mm.h>
13#include <linux/interrupt.h>
14#include <linux/major.h>
15#include <linux/errno.h>
16#include <linux/genhd.h>
17#include <linux/blkpg.h>
18#include <linux/slab.h>
19#include <linux/pci.h>
20#include <linux/delay.h>
21#include <linux/hdreg.h>
22#include <linux/ide.h>
23#include <linux/bitops.h>
Michal Schmidt1e862402006-07-30 03:03:29 -070024#include <linux/nmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26#include <asm/byteorder.h>
27#include <asm/irq.h>
28#include <asm/uaccess.h>
29#include <asm/io.h>
30
31/*
32 * Conventional PIO operations for ATA devices
33 */
34
35static u8 ide_inb (unsigned long port)
36{
37 return (u8) inb(port);
38}
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040static void ide_outb (u8 val, unsigned long port)
41{
42 outb(val, port);
43}
44
45static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port)
46{
47 outb(addr, port);
48}
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050void default_hwif_iops (ide_hwif_t *hwif)
51{
52 hwif->OUTB = ide_outb;
53 hwif->OUTBSYNC = ide_outbsync;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 hwif->INB = ide_inb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055}
56
Linus Torvalds1da177e2005-04-16 15:20:36 -070057/*
58 * MMIO operations, typically used for SATA controllers
59 */
60
61static u8 ide_mm_inb (unsigned long port)
62{
63 return (u8) readb((void __iomem *) port);
64}
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066static void ide_mm_outb (u8 value, unsigned long port)
67{
68 writeb(value, (void __iomem *) port);
69}
70
71static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port)
72{
73 writeb(value, (void __iomem *) port);
74}
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076void default_hwif_mmiops (ide_hwif_t *hwif)
77{
78 hwif->OUTB = ide_mm_outb;
79 /* Most systems will need to override OUTBSYNC, alas however
80 this one is controller specific! */
81 hwif->OUTBSYNC = ide_mm_outbsync;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 hwif->INB = ide_mm_inb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083}
84
85EXPORT_SYMBOL(default_hwif_mmiops);
86
Linus Torvalds1da177e2005-04-16 15:20:36 -070087void SELECT_DRIVE (ide_drive_t *drive)
88{
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +020089 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020090 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +020091
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020092 if (port_ops && port_ops->selectproc)
93 port_ops->selectproc(drive);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +020094
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +020095 hwif->OUTB(drive->select.all, hwif->io_ports.device_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098void SELECT_MASK (ide_drive_t *drive, int mask)
99{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200100 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
101
102 if (port_ops && port_ops->maskproc)
103 port_ops->maskproc(drive, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104}
105
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200106static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200107{
108 ide_hwif_t *hwif = drive->hwif;
109 struct ide_io_ports *io_ports = &hwif->io_ports;
110 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200111 void (*tf_outb)(u8 addr, unsigned long port);
112 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200113 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
114
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200115 if (mmio)
116 tf_outb = ide_mm_outb;
117 else
118 tf_outb = ide_outb;
119
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200120 if (task->tf_flags & IDE_TFLAG_FLAGGED)
121 HIHI = 0xFF;
122
123 ide_set_irq(drive, 1);
124
125 if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
126 SELECT_MASK(drive, 0);
127
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200128 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
129 u16 data = (tf->hob_data << 8) | tf->data;
130
131 if (mmio)
132 writew(data, (void __iomem *)io_ports->data_addr);
133 else
134 outw(data, io_ports->data_addr);
135 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200136
137 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200138 tf_outb(tf->hob_feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200139 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200140 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200141 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200142 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200143 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200144 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200145 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200146 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200147
148 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200149 tf_outb(tf->feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200150 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200151 tf_outb(tf->nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200152 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200153 tf_outb(tf->lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200154 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200155 tf_outb(tf->lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200156 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200157 tf_outb(tf->lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200158
159 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200160 tf_outb((tf->device & HIHI) | drive->select.all,
161 io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200162}
163
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200164static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200165{
166 ide_hwif_t *hwif = drive->hwif;
167 struct ide_io_ports *io_ports = &hwif->io_ports;
168 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200169 void (*tf_outb)(u8 addr, unsigned long port);
170 u8 (*tf_inb)(unsigned long port);
171 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
172
173 if (mmio) {
174 tf_outb = ide_mm_outb;
175 tf_inb = ide_mm_inb;
176 } else {
177 tf_outb = ide_outb;
178 tf_inb = ide_inb;
179 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200180
181 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200182 u16 data;
183
184 if (mmio)
185 data = readw((void __iomem *)io_ports->data_addr);
186 else
187 data = inw(io_ports->data_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200188
189 tf->data = data & 0xff;
190 tf->hob_data = (data >> 8) & 0xff;
191 }
192
193 /* be sure we're looking at the low order bits */
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200194 tf_outb(drive->ctl & ~0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200195
196 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200197 tf->nsect = tf_inb(io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200198 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200199 tf->lbal = tf_inb(io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200200 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200201 tf->lbam = tf_inb(io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200202 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200203 tf->lbah = tf_inb(io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200204 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200205 tf->device = tf_inb(io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200206
207 if (task->tf_flags & IDE_TFLAG_LBA48) {
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200208 tf_outb(drive->ctl | 0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200209
210 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200211 tf->hob_feature = tf_inb(io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200212 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200213 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200214 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200215 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200216 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200217 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200218 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200219 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200220 }
221}
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223/*
224 * Some localbus EIDE interfaces require a special access sequence
225 * when using 32-bit I/O instructions to transfer data. We call this
226 * the "vlb_sync" sequence, which consists of three successive reads
227 * of the sector count register location, with interrupts disabled
228 * to ensure that the reads all happen together.
229 */
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200230static void ata_vlb_sync(unsigned long port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200232 (void)inb(port);
233 (void)inb(port);
234 (void)inb(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
237/*
238 * This is used for most PIO data transfers *from* the IDE interface
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200239 *
240 * These routines will round up any request for an odd number of bytes,
241 * so if an odd len is specified, be sure that there's at least one
242 * extra byte allocated for the buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 */
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200244static void ata_input_data(ide_drive_t *drive, struct request *rq,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200245 void *buf, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200247 ide_hwif_t *hwif = drive->hwif;
248 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200249 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200250 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200251 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200253 len++;
254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200256 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200257
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200258 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200260 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200261 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200262
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200263 if (mmio)
264 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
265 else
266 insl(data_addr, buf, len / 4);
267
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200268 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200269 local_irq_restore(flags);
270
271 if ((len & 3) >= 2) {
272 if (mmio)
273 __ide_mm_insw((void __iomem *)data_addr,
274 (u8 *)buf + (len & ~3), 1);
275 else
276 insw(data_addr, (u8 *)buf + (len & ~3), 1);
277 }
278 } else {
279 if (mmio)
280 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
281 else
282 insw(data_addr, buf, len / 2);
283 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284}
285
286/*
287 * This is used for most PIO data transfers *to* the IDE interface
288 */
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200289static void ata_output_data(ide_drive_t *drive, struct request *rq,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200290 void *buf, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200292 ide_hwif_t *hwif = drive->hwif;
293 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200294 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200295 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200296 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200299 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200300
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200301 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200303 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200304 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200305
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200306 if (mmio)
307 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
308 else
309 outsl(data_addr, buf, len / 4);
310
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200311 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200312 local_irq_restore(flags);
313
314 if ((len & 3) >= 2) {
315 if (mmio)
316 __ide_mm_outsw((void __iomem *)data_addr,
317 (u8 *)buf + (len & ~3), 1);
318 else
319 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
320 }
321 } else {
322 if (mmio)
323 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
324 else
325 outsw(data_addr, buf, len / 2);
326 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327}
328
329void default_hwif_transport(ide_hwif_t *hwif)
330{
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200331 hwif->tf_load = ide_tf_load;
332 hwif->tf_read = ide_tf_read;
333
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200334 hwif->input_data = ata_input_data;
335 hwif->output_data = ata_output_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336}
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338void ide_fix_driveid (struct hd_driveid *id)
339{
340#ifndef __LITTLE_ENDIAN
341# ifdef __BIG_ENDIAN
342 int i;
343 u16 *stringcast;
344
345 id->config = __le16_to_cpu(id->config);
346 id->cyls = __le16_to_cpu(id->cyls);
347 id->reserved2 = __le16_to_cpu(id->reserved2);
348 id->heads = __le16_to_cpu(id->heads);
349 id->track_bytes = __le16_to_cpu(id->track_bytes);
350 id->sector_bytes = __le16_to_cpu(id->sector_bytes);
351 id->sectors = __le16_to_cpu(id->sectors);
352 id->vendor0 = __le16_to_cpu(id->vendor0);
353 id->vendor1 = __le16_to_cpu(id->vendor1);
354 id->vendor2 = __le16_to_cpu(id->vendor2);
355 stringcast = (u16 *)&id->serial_no[0];
356 for (i = 0; i < (20/2); i++)
357 stringcast[i] = __le16_to_cpu(stringcast[i]);
358 id->buf_type = __le16_to_cpu(id->buf_type);
359 id->buf_size = __le16_to_cpu(id->buf_size);
360 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes);
361 stringcast = (u16 *)&id->fw_rev[0];
362 for (i = 0; i < (8/2); i++)
363 stringcast[i] = __le16_to_cpu(stringcast[i]);
364 stringcast = (u16 *)&id->model[0];
365 for (i = 0; i < (40/2); i++)
366 stringcast[i] = __le16_to_cpu(stringcast[i]);
367 id->dword_io = __le16_to_cpu(id->dword_io);
368 id->reserved50 = __le16_to_cpu(id->reserved50);
369 id->field_valid = __le16_to_cpu(id->field_valid);
370 id->cur_cyls = __le16_to_cpu(id->cur_cyls);
371 id->cur_heads = __le16_to_cpu(id->cur_heads);
372 id->cur_sectors = __le16_to_cpu(id->cur_sectors);
373 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0);
374 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1);
375 id->lba_capacity = __le32_to_cpu(id->lba_capacity);
376 id->dma_1word = __le16_to_cpu(id->dma_1word);
377 id->dma_mword = __le16_to_cpu(id->dma_mword);
378 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
379 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min);
380 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time);
381 id->eide_pio = __le16_to_cpu(id->eide_pio);
382 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
383 for (i = 0; i < 2; ++i)
384 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
385 for (i = 0; i < 4; ++i)
386 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
387 id->queue_depth = __le16_to_cpu(id->queue_depth);
388 for (i = 0; i < 4; ++i)
389 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
390 id->major_rev_num = __le16_to_cpu(id->major_rev_num);
391 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num);
392 id->command_set_1 = __le16_to_cpu(id->command_set_1);
393 id->command_set_2 = __le16_to_cpu(id->command_set_2);
394 id->cfsse = __le16_to_cpu(id->cfsse);
395 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1);
396 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2);
397 id->csf_default = __le16_to_cpu(id->csf_default);
398 id->dma_ultra = __le16_to_cpu(id->dma_ultra);
399 id->trseuc = __le16_to_cpu(id->trseuc);
400 id->trsEuc = __le16_to_cpu(id->trsEuc);
401 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues);
402 id->mprc = __le16_to_cpu(id->mprc);
403 id->hw_config = __le16_to_cpu(id->hw_config);
404 id->acoustic = __le16_to_cpu(id->acoustic);
405 id->msrqs = __le16_to_cpu(id->msrqs);
406 id->sxfert = __le16_to_cpu(id->sxfert);
407 id->sal = __le16_to_cpu(id->sal);
408 id->spg = __le32_to_cpu(id->spg);
409 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
410 for (i = 0; i < 22; i++)
411 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]);
412 id->last_lun = __le16_to_cpu(id->last_lun);
413 id->word127 = __le16_to_cpu(id->word127);
414 id->dlf = __le16_to_cpu(id->dlf);
415 id->csfo = __le16_to_cpu(id->csfo);
416 for (i = 0; i < 26; i++)
417 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
418 id->word156 = __le16_to_cpu(id->word156);
419 for (i = 0; i < 3; i++)
420 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
421 id->cfa_power = __le16_to_cpu(id->cfa_power);
422 for (i = 0; i < 14; i++)
423 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
424 for (i = 0; i < 31; i++)
425 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
426 for (i = 0; i < 48; i++)
427 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
428 id->integrity_word = __le16_to_cpu(id->integrity_word);
429# else
430# error "Please fix <asm/byteorder.h>"
431# endif
432#endif
433}
434
Bartlomiej Zolnierkiewicz01745112007-11-05 21:42:29 +0100435/*
436 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
437 * removing leading/trailing blanks and compressing internal blanks.
438 * It is primarily used to tidy up the model name/number fields as
439 * returned by the WIN_[P]IDENTIFY commands.
440 */
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
443{
444 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
445
446 if (byteswap) {
447 /* convert from big-endian to host byte order */
448 for (p = end ; p != s;) {
449 unsigned short *pp = (unsigned short *) (p -= 2);
450 *pp = ntohs(*pp);
451 }
452 }
453 /* strip leading blanks */
454 while (s != end && *s == ' ')
455 ++s;
456 /* compress internal blanks and strip trailing blanks */
457 while (s != end && *s) {
458 if (*s++ != ' ' || (s != end && *s && *s != ' '))
459 *p++ = *(s-1);
460 }
461 /* wipe out trailing garbage */
462 while (p != end)
463 *p++ = '\0';
464}
465
466EXPORT_SYMBOL(ide_fixstring);
467
468/*
469 * Needed for PCI irq sharing
470 */
471int drive_is_ready (ide_drive_t *drive)
472{
473 ide_hwif_t *hwif = HWIF(drive);
474 u8 stat = 0;
475
476 if (drive->waiting_for_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200477 return hwif->dma_ops->dma_test_irq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479#if 0
480 /* need to guarantee 400ns since last command was issued */
481 udelay(1);
482#endif
483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 /*
485 * We do a passive status test under shared PCI interrupts on
486 * cards that truly share the ATA side interrupt, but may also share
487 * an interrupt with another pci card/device. We make no assumptions
488 * about possible isa-pnp and pci-pnp issues yet.
489 */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200490 if (hwif->io_ports.ctl_addr)
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100491 stat = ide_read_altstatus(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 /* Note: this may clear a pending IRQ!! */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100494 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495
496 if (stat & BUSY_STAT)
497 /* drive busy: definitely not interrupting */
498 return 0;
499
500 /* drive ready: *might* be interrupting */
501 return 1;
502}
503
504EXPORT_SYMBOL(drive_is_ready);
505
506/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 * This routine busy-waits for the drive status to be not "busy".
508 * It then checks the status for all of the "good" bits and none
509 * of the "bad" bits, and if all is okay it returns 0. All other
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200510 * cases return error -- caller may then invoke ide_error().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 *
512 * This routine should get fixed to not hog the cpu during extra long waits..
513 * That could be done by busy-waiting for the first jiffy or two, and then
514 * setting a timer to wake up at half second intervals thereafter,
515 * until timeout is achieved, before timing out.
516 */
Bartlomiej Zolnierkiewiczaedea592007-10-13 17:47:50 +0200517static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 unsigned long flags;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200520 int i;
521 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100524 stat = ide_read_status(drive);
525
526 if (stat & BUSY_STAT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 local_irq_set(flags);
528 timeout += jiffies;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100529 while ((stat = ide_read_status(drive)) & BUSY_STAT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 if (time_after(jiffies, timeout)) {
531 /*
532 * One last read after the timeout in case
533 * heavy interrupt load made us not make any
534 * progress during the timeout..
535 */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100536 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 if (!(stat & BUSY_STAT))
538 break;
539
540 local_irq_restore(flags);
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200541 *rstat = stat;
542 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 }
544 }
545 local_irq_restore(flags);
546 }
547 /*
548 * Allow status to settle, then read it again.
549 * A few rare drives vastly violate the 400ns spec here,
550 * so we'll wait up to 10usec for a "good" status
551 * rather than expensively fail things immediately.
552 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
553 */
554 for (i = 0; i < 10; i++) {
555 udelay(1);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100556 stat = ide_read_status(drive);
557
558 if (OK_STAT(stat, good, bad)) {
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200559 *rstat = stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 return 0;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200561 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 }
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200563 *rstat = stat;
564 return -EFAULT;
565}
566
567/*
568 * In case of error returns error value after doing "*startstop = ide_error()".
569 * The caller should return the updated value of "startstop" in this case,
570 * "startstop" is unchanged when the function returns 0.
571 */
572int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
573{
574 int err;
575 u8 stat;
576
577 /* bail early if we've exceeded max_failures */
578 if (drive->max_failures && (drive->failures > drive->max_failures)) {
579 *startstop = ide_stopped;
580 return 1;
581 }
582
583 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
584
585 if (err) {
586 char *s = (err == -EBUSY) ? "status timeout" : "status error";
587 *startstop = ide_error(drive, s, stat);
588 }
589
590 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591}
592
593EXPORT_SYMBOL(ide_wait_stat);
594
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200595/**
596 * ide_in_drive_list - look for drive in black/white list
597 * @id: drive identifier
598 * @drive_table: list to inspect
599 *
600 * Look for a drive in the blacklist and the whitelist tables
601 * Returns 1 if the drive is found in the table.
602 */
603
604int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
605{
606 for ( ; drive_table->id_model; drive_table++)
607 if ((!strcmp(drive_table->id_model, id->model)) &&
608 (!drive_table->id_firmware ||
609 strstr(id->fw_rev, drive_table->id_firmware)))
610 return 1;
611 return 0;
612}
613
Bartlomiej Zolnierkiewiczb0244a02007-08-20 22:42:57 +0200614EXPORT_SYMBOL_GPL(ide_in_drive_list);
615
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200616/*
617 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
618 * We list them here and depend on the device side cable detection for them.
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200619 *
620 * Some optical devices with the buggy firmwares have the same problem.
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200621 */
622static const struct drive_list_entry ivb_list[] = {
623 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200624 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
Peter Missele97564f2007-11-27 21:35:57 +0100625 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
626 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
627 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
Alexander Smal3ced5c42008-04-28 23:44:43 +0200628 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
629 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200630 { NULL , NULL }
631};
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633/*
634 * All hosts that use the 80c ribbon must use!
635 * The name is derived from upper byte of word 93 and the 80c ribbon.
636 */
637u8 eighty_ninty_three (ide_drive_t *drive)
638{
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200639 ide_hwif_t *hwif = drive->hwif;
640 struct hd_driveid *id = drive->id;
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200641 int ivb = ide_in_drive_list(id, ivb_list);
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200642
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200643 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
644 return 1;
645
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200646 if (ivb)
647 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
648 drive->name);
649
George Kibardinb98f8802008-01-10 23:03:42 +0100650 if (ide_dev_is_sata(id) && !ivb)
651 return 1;
652
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200653 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200654 goto no_80w;
Alan Cox1a1276e2006-06-28 04:26:58 -0700655
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200656 /*
657 * FIXME:
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100658 * - change master/slave IDENTIFY order
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200659 * - force bit13 (80c cable present) check also for !ivb devices
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200660 * (unless the slave device is pre-ATA3)
661 */
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200662 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200663 return 1;
664
665no_80w:
666 if (drive->udma33_warned == 1)
667 return 0;
668
669 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
670 "limiting max speed to UDMA33\n",
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200671 drive->name,
672 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200673
674 drive->udma33_warned = 1;
675
676 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677}
678
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200679int ide_driveid_update(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200681 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 struct hd_driveid *id;
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200683 unsigned long timeout, flags;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100684 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686 /*
687 * Re-read drive->id for possible DMA mode
688 * change (copied from ide-probe.c)
689 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691 SELECT_MASK(drive, 1);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100692 ide_set_irq(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 msleep(50);
Bartlomiej Zolnierkiewicz32b3fe42008-04-28 23:44:38 +0200694 hwif->OUTBSYNC(drive, WIN_IDENTIFY, hwif->io_ports.command_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 timeout = jiffies + WAIT_WORSTCASE;
696 do {
697 if (time_after(jiffies, timeout)) {
698 SELECT_MASK(drive, 0);
699 return 0; /* drive timed-out */
700 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 msleep(50); /* give drive a breather */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100703 stat = ide_read_altstatus(drive);
704 } while (stat & BUSY_STAT);
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 msleep(50); /* wait for IRQ and DRQ_STAT */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100707 stat = ide_read_status(drive);
708
709 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 SELECT_MASK(drive, 0);
711 printk("%s: CHECK for good STATUS\n", drive->name);
712 return 0;
713 }
714 local_irq_save(flags);
715 SELECT_MASK(drive, 0);
716 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
717 if (!id) {
718 local_irq_restore(flags);
719 return 0;
720 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200721 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100722 (void)ide_read_status(drive); /* clear drive IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 local_irq_enable();
724 local_irq_restore(flags);
725 ide_fix_driveid(id);
726 if (id) {
727 drive->id->dma_ultra = id->dma_ultra;
728 drive->id->dma_mword = id->dma_mword;
729 drive->id->dma_1word = id->dma_1word;
730 /* anything more ? */
731 kfree(id);
Bartlomiej Zolnierkiewicz3ab7efe2007-12-12 23:31:58 +0100732
733 if (drive->using_dma && ide_id_dma_bug(drive))
734 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 }
736
737 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738}
739
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200740int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741{
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200742 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200743 struct ide_io_ports *io_ports = &hwif->io_ports;
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100744 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 u8 stat;
746
747// while (HWGROUP(drive)->busy)
748// msleep(50);
749
750#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200751 if (hwif->dma_ops) /* check if host supports DMA */
752 hwif->dma_ops->dma_host_set(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753#endif
754
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100755 /* Skip setting PIO flow-control modes on pre-EIDE drives */
756 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
757 goto skip;
758
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 /*
760 * Don't use ide_wait_cmd here - it will
761 * attempt to set_geometry and recalibrate,
762 * but for some reason these don't work at
763 * this point (lost interrupt).
764 */
765 /*
766 * Select the drive, and issue the SETFEATURES command
767 */
768 disable_irq_nosync(hwif->irq);
769
770 /*
771 * FIXME: we race against the running IRQ here if
772 * this is called from non IRQ context. If we use
773 * disable_irq() we hang on the error path. Work
774 * is needed.
775 */
776
777 udelay(1);
778 SELECT_DRIVE(drive);
779 SELECT_MASK(drive, 0);
780 udelay(1);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100781 ide_set_irq(drive, 0);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200782 hwif->OUTB(speed, io_ports->nsect_addr);
783 hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
784 hwif->OUTBSYNC(drive, WIN_SETFEATURES, io_ports->command_addr);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100785 if (drive->quirk_list == 2)
786 ide_set_irq(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200788 error = __ide_wait_stat(drive, drive->ready_stat,
789 BUSY_STAT|DRQ_STAT|ERR_STAT,
790 WAIT_CMD, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791
792 SELECT_MASK(drive, 0);
793
794 enable_irq(hwif->irq);
795
796 if (error) {
797 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
798 return error;
799 }
800
801 drive->id->dma_ultra &= ~0xFF00;
802 drive->id->dma_mword &= ~0x0F00;
803 drive->id->dma_1word &= ~0x0F00;
804
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100805 skip:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewiczf37aaf92008-01-26 20:13:02 +0100807 if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) &&
808 drive->using_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200809 hwif->dma_ops->dma_host_set(drive, 1);
810 else if (hwif->dma_ops) /* check if host supports DMA */
Bartlomiej Zolnierkiewicz4a546e02008-01-26 20:13:01 +0100811 ide_dma_off_quietly(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812#endif
813
814 switch(speed) {
815 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
816 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
817 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
818 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
819 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
820 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
821 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
822 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
823 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
824 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
825 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
826 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
827 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
828 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
829 default: break;
830 }
831 if (!drive->init_speed)
832 drive->init_speed = speed;
833 drive->current_speed = speed;
834 return error;
835}
836
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837/*
838 * This should get invoked any time we exit the driver to
839 * wait for an interrupt response from a drive. handler() points
840 * at the appropriate code to handle the next interrupt, and a
841 * timer is started to prevent us from waiting forever in case
842 * something goes wrong (see the ide_timer_expiry() handler later on).
843 *
844 * See also ide_execute_command
845 */
846static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
847 unsigned int timeout, ide_expiry_t *expiry)
848{
849 ide_hwgroup_t *hwgroup = HWGROUP(drive);
850
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100851 BUG_ON(hwgroup->handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 hwgroup->handler = handler;
853 hwgroup->expiry = expiry;
854 hwgroup->timer.expires = jiffies + timeout;
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100855 hwgroup->req_gen_timer = hwgroup->req_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 add_timer(&hwgroup->timer);
857}
858
859void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
860 unsigned int timeout, ide_expiry_t *expiry)
861{
862 unsigned long flags;
863 spin_lock_irqsave(&ide_lock, flags);
864 __ide_set_handler(drive, handler, timeout, expiry);
865 spin_unlock_irqrestore(&ide_lock, flags);
866}
867
868EXPORT_SYMBOL(ide_set_handler);
869
870/**
871 * ide_execute_command - execute an IDE command
872 * @drive: IDE drive to issue the command against
873 * @command: command byte to write
874 * @handler: handler for next phase
875 * @timeout: timeout for command
876 * @expiry: handler to run on timeout
877 *
878 * Helper function to issue an IDE command. This handles the
879 * atomicity requirements, command timing and ensures that the
880 * handler and IRQ setup do not race. All IDE command kick off
881 * should go via this function or do equivalent locking.
882 */
Bartlomiej Zolnierkiewiczcd2a2d92008-01-25 22:17:06 +0100883
884void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
885 unsigned timeout, ide_expiry_t *expiry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886{
887 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100889
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100891 __ide_set_handler(drive, handler, timeout, expiry);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200892 hwif->OUTBSYNC(drive, cmd, hwif->io_ports.command_addr);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100893 /*
894 * Drive takes 400nS to respond, we must avoid the IRQ being
895 * serviced before that.
896 *
897 * FIXME: we could skip this delay with care on non shared devices
898 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 ndelay(400);
900 spin_unlock_irqrestore(&ide_lock, flags);
901}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902EXPORT_SYMBOL(ide_execute_command);
903
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200904void ide_execute_pkt_cmd(ide_drive_t *drive)
905{
906 ide_hwif_t *hwif = drive->hwif;
907 unsigned long flags;
908
909 spin_lock_irqsave(&ide_lock, flags);
910 hwif->OUTBSYNC(drive, WIN_PACKETCMD, hwif->io_ports.command_addr);
911 ndelay(400);
912 spin_unlock_irqrestore(&ide_lock, flags);
913}
914EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
916/* needed below */
917static ide_startstop_t do_reset1 (ide_drive_t *, int);
918
919/*
920 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
921 * during an atapi drive reset operation. If the drive has not yet responded,
922 * and we have not yet hit our maximum waiting time, then the timer is restarted
923 * for another 50ms.
924 */
925static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
926{
927 ide_hwgroup_t *hwgroup = HWGROUP(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 u8 stat;
929
930 SELECT_DRIVE(drive);
931 udelay (10);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100932 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100934 if (OK_STAT(stat, 0, BUSY_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 printk("%s: ATAPI reset complete\n", drive->name);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100936 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
939 /* continue polling */
940 return ide_started;
941 }
942 /* end of polling */
943 hwgroup->polling = 0;
944 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
945 drive->name, stat);
946 /* do it the old fashioned way */
947 return do_reset1(drive, 1);
948 }
949 /* done polling */
950 hwgroup->polling = 0;
Alan Cox913759a2006-10-03 01:14:33 -0700951 hwgroup->resetting = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 return ide_stopped;
953}
954
955/*
956 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
957 * during an ide reset operation. If the drives have not yet responded,
958 * and we have not yet hit our maximum waiting time, then the timer is restarted
959 * for another 50ms.
960 */
961static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
962{
963 ide_hwgroup_t *hwgroup = HWGROUP(drive);
964 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200965 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 u8 tmp;
967
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200968 if (port_ops && port_ops->reset_poll) {
969 if (port_ops->reset_poll(drive)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
971 hwif->name, drive->name);
972 return ide_stopped;
973 }
974 }
975
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100976 tmp = ide_read_status(drive);
977
978 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
981 /* continue polling */
982 return ide_started;
983 }
984 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
985 drive->failures++;
986 } else {
987 printk("%s: reset: ", hwif->name);
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +0100988 tmp = ide_read_error(drive);
989
990 if (tmp == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 printk("success\n");
992 drive->failures = 0;
993 } else {
994 drive->failures++;
995 printk("master: ");
996 switch (tmp & 0x7f) {
997 case 1: printk("passed");
998 break;
999 case 2: printk("formatter device error");
1000 break;
1001 case 3: printk("sector buffer error");
1002 break;
1003 case 4: printk("ECC circuitry error");
1004 break;
1005 case 5: printk("controlling MPU error");
1006 break;
1007 default:printk("error (0x%02x?)", tmp);
1008 }
1009 if (tmp & 0x80)
1010 printk("; slave: failed");
1011 printk("\n");
1012 }
1013 }
1014 hwgroup->polling = 0; /* done polling */
Alan Cox913759a2006-10-03 01:14:33 -07001015 hwgroup->resetting = 0; /* done reset attempt */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016 return ide_stopped;
1017}
1018
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019static void ide_disk_pre_reset(ide_drive_t *drive)
1020{
1021 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1022
1023 drive->special.all = 0;
1024 drive->special.b.set_geometry = legacy;
1025 drive->special.b.recalibrate = legacy;
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +01001026 drive->mult_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027 if (!drive->keep_settings && !drive->using_dma)
1028 drive->mult_req = 0;
1029 if (drive->mult_req != drive->mult_count)
1030 drive->special.b.set_multmode = 1;
1031}
1032
1033static void pre_reset(ide_drive_t *drive)
1034{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001035 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1036
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 if (drive->media == ide_disk)
1038 ide_disk_pre_reset(drive);
1039 else
1040 drive->post_reset = 1;
1041
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001042 if (drive->using_dma) {
1043 if (drive->crc_count)
Bartlomiej Zolnierkiewicz578cfa02008-02-02 19:56:47 +01001044 ide_check_dma_crc(drive);
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001045 else
1046 ide_dma_off(drive);
1047 }
1048
1049 if (!drive->keep_settings) {
1050 if (!drive->using_dma) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 drive->unmask = 0;
1052 drive->io_32bit = 0;
1053 }
1054 return;
1055 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001057 if (port_ops && port_ops->pre_reset)
1058 port_ops->pre_reset(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059
Suleiman Souhlal513daad2007-03-26 23:03:20 +02001060 if (drive->current_speed != 0xff)
1061 drive->desired_speed = drive->current_speed;
1062 drive->current_speed = 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063}
1064
1065/*
1066 * do_reset1() attempts to recover a confused drive by resetting it.
1067 * Unfortunately, resetting a disk drive actually resets all devices on
1068 * the same interface, so it can really be thought of as resetting the
1069 * interface rather than resetting the drive.
1070 *
1071 * ATAPI devices have their own reset mechanism which allows them to be
1072 * individually reset without clobbering other devices on the same interface.
1073 *
1074 * Unfortunately, the IDE interface does not generate an interrupt to let
1075 * us know when the reset operation has finished, so we must poll for this.
1076 * Equally poor, though, is the fact that this may a very long time to complete,
1077 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1078 * we set a timer to poll at 50ms intervals.
1079 */
1080static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1081{
1082 unsigned int unit;
1083 unsigned long flags;
1084 ide_hwif_t *hwif;
1085 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001086 struct ide_io_ports *io_ports;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001087 const struct ide_port_ops *port_ops;
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001088 u8 ctl;
1089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 spin_lock_irqsave(&ide_lock, flags);
1091 hwif = HWIF(drive);
1092 hwgroup = HWGROUP(drive);
1093
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001094 io_ports = &hwif->io_ports;
1095
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 /* We must not reset with running handlers */
Eric Sesterhenn125e1872006-06-23 02:06:06 -07001097 BUG_ON(hwgroup->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099 /* For an ATAPI device, first try an ATAPI SRST. */
1100 if (drive->media != ide_disk && !do_not_try_atapi) {
Alan Cox913759a2006-10-03 01:14:33 -07001101 hwgroup->resetting = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 pre_reset(drive);
1103 SELECT_DRIVE(drive);
1104 udelay (20);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001105 hwif->OUTBSYNC(drive, WIN_SRST, io_ports->command_addr);
Alan Cox68ad9912005-06-27 15:24:25 -07001106 ndelay(400);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1108 hwgroup->polling = 1;
1109 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1110 spin_unlock_irqrestore(&ide_lock, flags);
1111 return ide_started;
1112 }
1113
1114 /*
1115 * First, reset any device state data we were maintaining
1116 * for any of the drives on this interface.
1117 */
1118 for (unit = 0; unit < MAX_DRIVES; ++unit)
1119 pre_reset(&hwif->drives[unit]);
1120
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001121 if (io_ports->ctl_addr == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122 spin_unlock_irqrestore(&ide_lock, flags);
1123 return ide_stopped;
1124 }
1125
Alan Cox913759a2006-10-03 01:14:33 -07001126 hwgroup->resetting = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 /*
1128 * Note that we also set nIEN while resetting the device,
1129 * to mask unwanted interrupts from the interface during the reset.
1130 * However, due to the design of PC hardware, this will cause an
1131 * immediate interrupt due to the edge transition it produces.
1132 * This single interrupt gives us a "fast poll" for drives that
1133 * recover from reset very quickly, saving us the first 50ms wait time.
1134 */
1135 /* set SRST and nIEN */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001136 hwif->OUTBSYNC(drive, drive->ctl|6, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 /* more than enough time */
1138 udelay(10);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001139 if (drive->quirk_list == 2)
1140 ctl = drive->ctl; /* clear SRST and nIEN */
1141 else
1142 ctl = drive->ctl | 2; /* clear SRST, leave nIEN */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001143 hwif->OUTBSYNC(drive, ctl, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 /* more than enough time */
1145 udelay(10);
1146 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1147 hwgroup->polling = 1;
1148 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1149
1150 /*
1151 * Some weird controller like resetting themselves to a strange
1152 * state when the disks are reset this way. At least, the Winbond
1153 * 553 documentation says that
1154 */
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001155 port_ops = hwif->port_ops;
1156 if (port_ops && port_ops->resetproc)
1157 port_ops->resetproc(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158
1159 spin_unlock_irqrestore(&ide_lock, flags);
1160 return ide_started;
1161}
1162
1163/*
1164 * ide_do_reset() is the entry point to the drive/interface reset code.
1165 */
1166
1167ide_startstop_t ide_do_reset (ide_drive_t *drive)
1168{
1169 return do_reset1(drive, 0);
1170}
1171
1172EXPORT_SYMBOL(ide_do_reset);
1173
1174/*
1175 * ide_wait_not_busy() waits for the currently selected device on the hwif
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +01001176 * to report a non-busy status, see comments in ide_probe_port().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 */
1178int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1179{
1180 u8 stat = 0;
1181
1182 while(timeout--) {
1183 /*
1184 * Turn this into a schedule() sleep once I'm sure
1185 * about locking issues (2.5 work ?).
1186 */
1187 mdelay(1);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001188 stat = hwif->INB(hwif->io_ports.status_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189 if ((stat & BUSY_STAT) == 0)
1190 return 0;
1191 /*
1192 * Assume a value of 0xff means nothing is connected to
1193 * the interface and it doesn't implement the pull-down
1194 * resistor on D7.
1195 */
1196 if (stat == 0xff)
1197 return -ENODEV;
Ingo Molnar6842f8c2006-02-03 03:04:55 -08001198 touch_softlockup_watchdog();
Michal Schmidt1e862402006-07-30 03:03:29 -07001199 touch_nmi_watchdog();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 }
1201 return -EBUSY;
1202}
1203
1204EXPORT_SYMBOL_GPL(ide_wait_not_busy);
1205