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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
Bartlomiej Zolnierkiewiczf8c4bd0a2008-07-15 21:21:49 +020045static void ide_outbsync(ide_hwif_t *hwif, u8 addr, unsigned long port)
Linus Torvalds1da177e2005-04-16 15:20:36 -070046{
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
Bartlomiej Zolnierkiewiczf8c4bd0a2008-07-15 21:21:49 +020071static void ide_mm_outbsync(ide_hwif_t *hwif, u8 value, unsigned long port)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
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
Bartlomiej Zolnierkiewiczed4af482008-07-15 21:21:48 +020098void SELECT_MASK(ide_drive_t *drive, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
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 Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200106static void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
107{
108 if (hwif->host_flags & IDE_HFLAG_MMIO)
109 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
110 else
111 outb(cmd, hwif->io_ports.command_addr);
112}
113
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200114static u8 ide_read_status(ide_hwif_t *hwif)
115{
116 if (hwif->host_flags & IDE_HFLAG_MMIO)
117 return readb((void __iomem *)hwif->io_ports.status_addr);
118 else
119 return inb(hwif->io_ports.status_addr);
120}
121
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200122static u8 ide_read_altstatus(ide_hwif_t *hwif)
123{
124 if (hwif->host_flags & IDE_HFLAG_MMIO)
125 return readb((void __iomem *)hwif->io_ports.ctl_addr);
126 else
127 return inb(hwif->io_ports.ctl_addr);
128}
129
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200130static u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
131{
132 if (hwif->host_flags & IDE_HFLAG_MMIO)
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200133 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200134 else
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200135 return inb(hwif->dma_base + ATA_DMA_STATUS);
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200136}
137
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200138static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200139{
140 ide_hwif_t *hwif = drive->hwif;
141 struct ide_io_ports *io_ports = &hwif->io_ports;
142 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200143 void (*tf_outb)(u8 addr, unsigned long port);
144 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200145 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
146
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200147 if (mmio)
148 tf_outb = ide_mm_outb;
149 else
150 tf_outb = ide_outb;
151
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200152 if (task->tf_flags & IDE_TFLAG_FLAGGED)
153 HIHI = 0xFF;
154
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200155 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
156 u16 data = (tf->hob_data << 8) | tf->data;
157
158 if (mmio)
159 writew(data, (void __iomem *)io_ports->data_addr);
160 else
161 outw(data, io_ports->data_addr);
162 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200163
164 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200165 tf_outb(tf->hob_feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200166 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200167 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200168 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200169 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200170 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200171 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200172 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200173 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200174
175 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200176 tf_outb(tf->feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200177 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200178 tf_outb(tf->nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200179 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200180 tf_outb(tf->lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200181 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200182 tf_outb(tf->lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200183 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200184 tf_outb(tf->lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200185
186 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200187 tf_outb((tf->device & HIHI) | drive->select.all,
188 io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200189}
190
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200191static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200192{
193 ide_hwif_t *hwif = drive->hwif;
194 struct ide_io_ports *io_ports = &hwif->io_ports;
195 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200196 void (*tf_outb)(u8 addr, unsigned long port);
197 u8 (*tf_inb)(unsigned long port);
198 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
199
200 if (mmio) {
201 tf_outb = ide_mm_outb;
202 tf_inb = ide_mm_inb;
203 } else {
204 tf_outb = ide_outb;
205 tf_inb = ide_inb;
206 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200207
208 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200209 u16 data;
210
211 if (mmio)
212 data = readw((void __iomem *)io_ports->data_addr);
213 else
214 data = inw(io_ports->data_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200215
216 tf->data = data & 0xff;
217 tf->hob_data = (data >> 8) & 0xff;
218 }
219
220 /* be sure we're looking at the low order bits */
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +0200221 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200222
223 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200224 tf->nsect = tf_inb(io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200225 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200226 tf->lbal = tf_inb(io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200227 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200228 tf->lbam = tf_inb(io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200229 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200230 tf->lbah = tf_inb(io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200231 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200232 tf->device = tf_inb(io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200233
234 if (task->tf_flags & IDE_TFLAG_LBA48) {
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +0200235 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200236
237 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200238 tf->hob_feature = tf_inb(io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200239 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200240 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200241 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200242 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200243 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200244 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200245 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200246 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200247 }
248}
249
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250/*
251 * Some localbus EIDE interfaces require a special access sequence
252 * when using 32-bit I/O instructions to transfer data. We call this
253 * the "vlb_sync" sequence, which consists of three successive reads
254 * of the sector count register location, with interrupts disabled
255 * to ensure that the reads all happen together.
256 */
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200257static void ata_vlb_sync(unsigned long port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200259 (void)inb(port);
260 (void)inb(port);
261 (void)inb(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262}
263
264/*
265 * This is used for most PIO data transfers *from* the IDE interface
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200266 *
267 * These routines will round up any request for an odd number of bytes,
268 * so if an odd len is specified, be sure that there's at least one
269 * extra byte allocated for the buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 */
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200271static void ata_input_data(ide_drive_t *drive, struct request *rq,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200272 void *buf, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200274 ide_hwif_t *hwif = drive->hwif;
275 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200276 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200277 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200278 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200280 len++;
281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200283 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200284
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200285 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200287 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200288 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200289
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200290 if (mmio)
291 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
292 else
293 insl(data_addr, buf, len / 4);
294
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200295 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200296 local_irq_restore(flags);
297
298 if ((len & 3) >= 2) {
299 if (mmio)
300 __ide_mm_insw((void __iomem *)data_addr,
301 (u8 *)buf + (len & ~3), 1);
302 else
303 insw(data_addr, (u8 *)buf + (len & ~3), 1);
304 }
305 } else {
306 if (mmio)
307 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
308 else
309 insw(data_addr, buf, len / 2);
310 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
313/*
314 * This is used for most PIO data transfers *to* the IDE interface
315 */
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200316static void ata_output_data(ide_drive_t *drive, struct request *rq,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200317 void *buf, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200319 ide_hwif_t *hwif = drive->hwif;
320 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200321 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200322 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200323 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200326 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200327
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200328 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200330 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200331 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200332
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200333 if (mmio)
334 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
335 else
336 outsl(data_addr, buf, len / 4);
337
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200338 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200339 local_irq_restore(flags);
340
341 if ((len & 3) >= 2) {
342 if (mmio)
343 __ide_mm_outsw((void __iomem *)data_addr,
344 (u8 *)buf + (len & ~3), 1);
345 else
346 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
347 }
348 } else {
349 if (mmio)
350 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
351 else
352 outsw(data_addr, buf, len / 2);
353 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354}
355
356void default_hwif_transport(ide_hwif_t *hwif)
357{
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200358 hwif->exec_command = ide_exec_command;
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200359 hwif->read_status = ide_read_status;
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200360 hwif->read_altstatus = ide_read_altstatus;
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200361 hwif->read_sff_dma_status = ide_read_sff_dma_status;
362
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200363 hwif->tf_load = ide_tf_load;
364 hwif->tf_read = ide_tf_read;
365
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200366 hwif->input_data = ata_input_data;
367 hwif->output_data = ata_output_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368}
369
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370void ide_fix_driveid (struct hd_driveid *id)
371{
372#ifndef __LITTLE_ENDIAN
373# ifdef __BIG_ENDIAN
374 int i;
375 u16 *stringcast;
376
377 id->config = __le16_to_cpu(id->config);
378 id->cyls = __le16_to_cpu(id->cyls);
379 id->reserved2 = __le16_to_cpu(id->reserved2);
380 id->heads = __le16_to_cpu(id->heads);
381 id->track_bytes = __le16_to_cpu(id->track_bytes);
382 id->sector_bytes = __le16_to_cpu(id->sector_bytes);
383 id->sectors = __le16_to_cpu(id->sectors);
384 id->vendor0 = __le16_to_cpu(id->vendor0);
385 id->vendor1 = __le16_to_cpu(id->vendor1);
386 id->vendor2 = __le16_to_cpu(id->vendor2);
387 stringcast = (u16 *)&id->serial_no[0];
388 for (i = 0; i < (20/2); i++)
389 stringcast[i] = __le16_to_cpu(stringcast[i]);
390 id->buf_type = __le16_to_cpu(id->buf_type);
391 id->buf_size = __le16_to_cpu(id->buf_size);
392 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes);
393 stringcast = (u16 *)&id->fw_rev[0];
394 for (i = 0; i < (8/2); i++)
395 stringcast[i] = __le16_to_cpu(stringcast[i]);
396 stringcast = (u16 *)&id->model[0];
397 for (i = 0; i < (40/2); i++)
398 stringcast[i] = __le16_to_cpu(stringcast[i]);
399 id->dword_io = __le16_to_cpu(id->dword_io);
400 id->reserved50 = __le16_to_cpu(id->reserved50);
401 id->field_valid = __le16_to_cpu(id->field_valid);
402 id->cur_cyls = __le16_to_cpu(id->cur_cyls);
403 id->cur_heads = __le16_to_cpu(id->cur_heads);
404 id->cur_sectors = __le16_to_cpu(id->cur_sectors);
405 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0);
406 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1);
407 id->lba_capacity = __le32_to_cpu(id->lba_capacity);
408 id->dma_1word = __le16_to_cpu(id->dma_1word);
409 id->dma_mword = __le16_to_cpu(id->dma_mword);
410 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
411 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min);
412 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time);
413 id->eide_pio = __le16_to_cpu(id->eide_pio);
414 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
415 for (i = 0; i < 2; ++i)
416 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
417 for (i = 0; i < 4; ++i)
418 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
419 id->queue_depth = __le16_to_cpu(id->queue_depth);
420 for (i = 0; i < 4; ++i)
421 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
422 id->major_rev_num = __le16_to_cpu(id->major_rev_num);
423 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num);
424 id->command_set_1 = __le16_to_cpu(id->command_set_1);
425 id->command_set_2 = __le16_to_cpu(id->command_set_2);
426 id->cfsse = __le16_to_cpu(id->cfsse);
427 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1);
428 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2);
429 id->csf_default = __le16_to_cpu(id->csf_default);
430 id->dma_ultra = __le16_to_cpu(id->dma_ultra);
431 id->trseuc = __le16_to_cpu(id->trseuc);
432 id->trsEuc = __le16_to_cpu(id->trsEuc);
433 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues);
434 id->mprc = __le16_to_cpu(id->mprc);
435 id->hw_config = __le16_to_cpu(id->hw_config);
436 id->acoustic = __le16_to_cpu(id->acoustic);
437 id->msrqs = __le16_to_cpu(id->msrqs);
438 id->sxfert = __le16_to_cpu(id->sxfert);
439 id->sal = __le16_to_cpu(id->sal);
440 id->spg = __le32_to_cpu(id->spg);
441 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
442 for (i = 0; i < 22; i++)
443 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]);
444 id->last_lun = __le16_to_cpu(id->last_lun);
445 id->word127 = __le16_to_cpu(id->word127);
446 id->dlf = __le16_to_cpu(id->dlf);
447 id->csfo = __le16_to_cpu(id->csfo);
448 for (i = 0; i < 26; i++)
449 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
450 id->word156 = __le16_to_cpu(id->word156);
451 for (i = 0; i < 3; i++)
452 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
453 id->cfa_power = __le16_to_cpu(id->cfa_power);
454 for (i = 0; i < 14; i++)
455 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
456 for (i = 0; i < 31; i++)
457 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
458 for (i = 0; i < 48; i++)
459 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
460 id->integrity_word = __le16_to_cpu(id->integrity_word);
461# else
462# error "Please fix <asm/byteorder.h>"
463# endif
464#endif
465}
466
Bartlomiej Zolnierkiewicz01745112007-11-05 21:42:29 +0100467/*
468 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
469 * removing leading/trailing blanks and compressing internal blanks.
470 * It is primarily used to tidy up the model name/number fields as
471 * returned by the WIN_[P]IDENTIFY commands.
472 */
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
475{
476 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
477
478 if (byteswap) {
479 /* convert from big-endian to host byte order */
480 for (p = end ; p != s;) {
481 unsigned short *pp = (unsigned short *) (p -= 2);
482 *pp = ntohs(*pp);
483 }
484 }
485 /* strip leading blanks */
486 while (s != end && *s == ' ')
487 ++s;
488 /* compress internal blanks and strip trailing blanks */
489 while (s != end && *s) {
490 if (*s++ != ' ' || (s != end && *s && *s != ' '))
491 *p++ = *(s-1);
492 }
493 /* wipe out trailing garbage */
494 while (p != end)
495 *p++ = '\0';
496}
497
498EXPORT_SYMBOL(ide_fixstring);
499
500/*
501 * Needed for PCI irq sharing
502 */
503int drive_is_ready (ide_drive_t *drive)
504{
505 ide_hwif_t *hwif = HWIF(drive);
506 u8 stat = 0;
507
508 if (drive->waiting_for_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200509 return hwif->dma_ops->dma_test_irq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
511#if 0
512 /* need to guarantee 400ns since last command was issued */
513 udelay(1);
514#endif
515
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 /*
517 * We do a passive status test under shared PCI interrupts on
518 * cards that truly share the ATA side interrupt, but may also share
519 * an interrupt with another pci card/device. We make no assumptions
520 * about possible isa-pnp and pci-pnp issues yet.
521 */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200522 if (hwif->io_ports.ctl_addr)
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200523 stat = hwif->read_altstatus(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 /* Note: this may clear a pending IRQ!! */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200526 stat = hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
528 if (stat & BUSY_STAT)
529 /* drive busy: definitely not interrupting */
530 return 0;
531
532 /* drive ready: *might* be interrupting */
533 return 1;
534}
535
536EXPORT_SYMBOL(drive_is_ready);
537
538/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 * This routine busy-waits for the drive status to be not "busy".
540 * It then checks the status for all of the "good" bits and none
541 * of the "bad" bits, and if all is okay it returns 0. All other
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200542 * cases return error -- caller may then invoke ide_error().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 *
544 * This routine should get fixed to not hog the cpu during extra long waits..
545 * That could be done by busy-waiting for the first jiffy or two, and then
546 * setting a timer to wake up at half second intervals thereafter,
547 * until timeout is achieved, before timing out.
548 */
Bartlomiej Zolnierkiewiczaedea592007-10-13 17:47:50 +0200549static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200551 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 unsigned long flags;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200553 int i;
554 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200557 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100558
559 if (stat & BUSY_STAT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 local_irq_set(flags);
561 timeout += jiffies;
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200562 while ((stat = hwif->read_status(hwif)) & BUSY_STAT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 if (time_after(jiffies, timeout)) {
564 /*
565 * One last read after the timeout in case
566 * heavy interrupt load made us not make any
567 * progress during the timeout..
568 */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200569 stat = hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 if (!(stat & BUSY_STAT))
571 break;
572
573 local_irq_restore(flags);
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200574 *rstat = stat;
575 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 }
577 }
578 local_irq_restore(flags);
579 }
580 /*
581 * Allow status to settle, then read it again.
582 * A few rare drives vastly violate the 400ns spec here,
583 * so we'll wait up to 10usec for a "good" status
584 * rather than expensively fail things immediately.
585 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
586 */
587 for (i = 0; i < 10; i++) {
588 udelay(1);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200589 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100590
591 if (OK_STAT(stat, good, bad)) {
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200592 *rstat = stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 return 0;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200594 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 }
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200596 *rstat = stat;
597 return -EFAULT;
598}
599
600/*
601 * In case of error returns error value after doing "*startstop = ide_error()".
602 * The caller should return the updated value of "startstop" in this case,
603 * "startstop" is unchanged when the function returns 0.
604 */
605int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
606{
607 int err;
608 u8 stat;
609
610 /* bail early if we've exceeded max_failures */
611 if (drive->max_failures && (drive->failures > drive->max_failures)) {
612 *startstop = ide_stopped;
613 return 1;
614 }
615
616 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
617
618 if (err) {
619 char *s = (err == -EBUSY) ? "status timeout" : "status error";
620 *startstop = ide_error(drive, s, stat);
621 }
622
623 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624}
625
626EXPORT_SYMBOL(ide_wait_stat);
627
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200628/**
629 * ide_in_drive_list - look for drive in black/white list
630 * @id: drive identifier
631 * @drive_table: list to inspect
632 *
633 * Look for a drive in the blacklist and the whitelist tables
634 * Returns 1 if the drive is found in the table.
635 */
636
637int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
638{
639 for ( ; drive_table->id_model; drive_table++)
640 if ((!strcmp(drive_table->id_model, id->model)) &&
641 (!drive_table->id_firmware ||
642 strstr(id->fw_rev, drive_table->id_firmware)))
643 return 1;
644 return 0;
645}
646
Bartlomiej Zolnierkiewiczb0244a02007-08-20 22:42:57 +0200647EXPORT_SYMBOL_GPL(ide_in_drive_list);
648
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200649/*
650 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
651 * We list them here and depend on the device side cable detection for them.
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200652 *
653 * Some optical devices with the buggy firmwares have the same problem.
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200654 */
655static const struct drive_list_entry ivb_list[] = {
656 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200657 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
Peter Missele97564f2007-11-27 21:35:57 +0100658 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
659 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
660 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
Alexander Smal3ced5c42008-04-28 23:44:43 +0200661 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
662 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200663 { NULL , NULL }
664};
665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666/*
667 * All hosts that use the 80c ribbon must use!
668 * The name is derived from upper byte of word 93 and the 80c ribbon.
669 */
670u8 eighty_ninty_three (ide_drive_t *drive)
671{
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200672 ide_hwif_t *hwif = drive->hwif;
673 struct hd_driveid *id = drive->id;
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200674 int ivb = ide_in_drive_list(id, ivb_list);
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200675
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200676 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
677 return 1;
678
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200679 if (ivb)
680 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
681 drive->name);
682
George Kibardinb98f8802008-01-10 23:03:42 +0100683 if (ide_dev_is_sata(id) && !ivb)
684 return 1;
685
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200686 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200687 goto no_80w;
Alan Cox1a1276e2006-06-28 04:26:58 -0700688
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200689 /*
690 * FIXME:
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100691 * - change master/slave IDENTIFY order
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200692 * - force bit13 (80c cable present) check also for !ivb devices
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200693 * (unless the slave device is pre-ATA3)
694 */
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200695 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200696 return 1;
697
698no_80w:
699 if (drive->udma33_warned == 1)
700 return 0;
701
702 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
703 "limiting max speed to UDMA33\n",
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200704 drive->name,
705 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200706
707 drive->udma33_warned = 1;
708
709 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710}
711
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200712int ide_driveid_update(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200714 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 struct hd_driveid *id;
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200716 unsigned long timeout, flags;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100717 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 /*
720 * Re-read drive->id for possible DMA mode
721 * change (copied from ide-probe.c)
722 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
724 SELECT_MASK(drive, 1);
Mikhail Cherkashin5ddee512008-07-15 21:21:40 +0200725 ide_set_irq(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 msleep(50);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200727 hwif->exec_command(hwif, WIN_IDENTIFY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 timeout = jiffies + WAIT_WORSTCASE;
729 do {
730 if (time_after(jiffies, timeout)) {
731 SELECT_MASK(drive, 0);
732 return 0; /* drive timed-out */
733 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 msleep(50); /* give drive a breather */
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200736 stat = hwif->read_altstatus(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100737 } while (stat & BUSY_STAT);
738
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 msleep(50); /* wait for IRQ and DRQ_STAT */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200740 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100741
742 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 SELECT_MASK(drive, 0);
744 printk("%s: CHECK for good STATUS\n", drive->name);
745 return 0;
746 }
747 local_irq_save(flags);
748 SELECT_MASK(drive, 0);
749 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
750 if (!id) {
751 local_irq_restore(flags);
752 return 0;
753 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200754 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200755 (void)hwif->read_status(hwif); /* clear drive IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 local_irq_enable();
757 local_irq_restore(flags);
758 ide_fix_driveid(id);
759 if (id) {
760 drive->id->dma_ultra = id->dma_ultra;
761 drive->id->dma_mword = id->dma_mword;
762 drive->id->dma_1word = id->dma_1word;
763 /* anything more ? */
764 kfree(id);
Bartlomiej Zolnierkiewicz3ab7efe2007-12-12 23:31:58 +0100765
766 if (drive->using_dma && ide_id_dma_bug(drive))
767 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 }
769
770 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771}
772
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200773int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774{
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200775 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200776 struct ide_io_ports *io_ports = &hwif->io_ports;
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100777 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 u8 stat;
779
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200781 if (hwif->dma_ops) /* check if host supports DMA */
782 hwif->dma_ops->dma_host_set(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783#endif
784
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100785 /* Skip setting PIO flow-control modes on pre-EIDE drives */
786 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
787 goto skip;
788
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 /*
790 * Don't use ide_wait_cmd here - it will
791 * attempt to set_geometry and recalibrate,
792 * but for some reason these don't work at
793 * this point (lost interrupt).
794 */
795 /*
796 * Select the drive, and issue the SETFEATURES command
797 */
798 disable_irq_nosync(hwif->irq);
799
800 /*
801 * FIXME: we race against the running IRQ here if
802 * this is called from non IRQ context. If we use
803 * disable_irq() we hang on the error path. Work
804 * is needed.
805 */
806
807 udelay(1);
808 SELECT_DRIVE(drive);
809 SELECT_MASK(drive, 0);
810 udelay(1);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100811 ide_set_irq(drive, 0);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200812 hwif->OUTB(speed, io_ports->nsect_addr);
813 hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200814 hwif->exec_command(hwif, WIN_SETFEATURES);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100815 if (drive->quirk_list == 2)
816 ide_set_irq(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200818 error = __ide_wait_stat(drive, drive->ready_stat,
819 BUSY_STAT|DRQ_STAT|ERR_STAT,
820 WAIT_CMD, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821
822 SELECT_MASK(drive, 0);
823
824 enable_irq(hwif->irq);
825
826 if (error) {
827 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
828 return error;
829 }
830
831 drive->id->dma_ultra &= ~0xFF00;
832 drive->id->dma_mword &= ~0x0F00;
833 drive->id->dma_1word &= ~0x0F00;
834
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100835 skip:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewiczf37aaf92008-01-26 20:13:02 +0100837 if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) &&
838 drive->using_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200839 hwif->dma_ops->dma_host_set(drive, 1);
840 else if (hwif->dma_ops) /* check if host supports DMA */
Bartlomiej Zolnierkiewicz4a546e02008-01-26 20:13:01 +0100841 ide_dma_off_quietly(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842#endif
843
844 switch(speed) {
845 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
846 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
847 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
848 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
849 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
850 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
851 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
852 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
853 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
854 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
855 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
856 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
857 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
858 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
859 default: break;
860 }
861 if (!drive->init_speed)
862 drive->init_speed = speed;
863 drive->current_speed = speed;
864 return error;
865}
866
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867/*
868 * This should get invoked any time we exit the driver to
869 * wait for an interrupt response from a drive. handler() points
870 * at the appropriate code to handle the next interrupt, and a
871 * timer is started to prevent us from waiting forever in case
872 * something goes wrong (see the ide_timer_expiry() handler later on).
873 *
874 * See also ide_execute_command
875 */
876static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
877 unsigned int timeout, ide_expiry_t *expiry)
878{
879 ide_hwgroup_t *hwgroup = HWGROUP(drive);
880
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100881 BUG_ON(hwgroup->handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 hwgroup->handler = handler;
883 hwgroup->expiry = expiry;
884 hwgroup->timer.expires = jiffies + timeout;
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100885 hwgroup->req_gen_timer = hwgroup->req_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 add_timer(&hwgroup->timer);
887}
888
889void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
890 unsigned int timeout, ide_expiry_t *expiry)
891{
892 unsigned long flags;
893 spin_lock_irqsave(&ide_lock, flags);
894 __ide_set_handler(drive, handler, timeout, expiry);
895 spin_unlock_irqrestore(&ide_lock, flags);
896}
897
898EXPORT_SYMBOL(ide_set_handler);
899
900/**
901 * ide_execute_command - execute an IDE command
902 * @drive: IDE drive to issue the command against
903 * @command: command byte to write
904 * @handler: handler for next phase
905 * @timeout: timeout for command
906 * @expiry: handler to run on timeout
907 *
908 * Helper function to issue an IDE command. This handles the
909 * atomicity requirements, command timing and ensures that the
910 * handler and IRQ setup do not race. All IDE command kick off
911 * should go via this function or do equivalent locking.
912 */
Bartlomiej Zolnierkiewiczcd2a2d92008-01-25 22:17:06 +0100913
914void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
915 unsigned timeout, ide_expiry_t *expiry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916{
917 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100921 __ide_set_handler(drive, handler, timeout, expiry);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200922 hwif->exec_command(hwif, cmd);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100923 /*
924 * Drive takes 400nS to respond, we must avoid the IRQ being
925 * serviced before that.
926 *
927 * FIXME: we could skip this delay with care on non shared devices
928 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 ndelay(400);
930 spin_unlock_irqrestore(&ide_lock, flags);
931}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932EXPORT_SYMBOL(ide_execute_command);
933
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200934void ide_execute_pkt_cmd(ide_drive_t *drive)
935{
936 ide_hwif_t *hwif = drive->hwif;
937 unsigned long flags;
938
939 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200940 hwif->exec_command(hwif, WIN_PACKETCMD);
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200941 ndelay(400);
942 spin_unlock_irqrestore(&ide_lock, flags);
943}
944EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200946static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200947{
948 struct request *rq = drive->hwif->hwgroup->rq;
949
950 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200951 ide_end_request(drive, err ? err : 1, 0);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200952}
953
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954/* needed below */
955static ide_startstop_t do_reset1 (ide_drive_t *, int);
956
957/*
958 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
959 * during an atapi drive reset operation. If the drive has not yet responded,
960 * and we have not yet hit our maximum waiting time, then the timer is restarted
961 * for another 50ms.
962 */
963static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
964{
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200965 ide_hwif_t *hwif = drive->hwif;
966 ide_hwgroup_t *hwgroup = hwif->hwgroup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 u8 stat;
968
969 SELECT_DRIVE(drive);
970 udelay (10);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200971 stat = hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100973 if (OK_STAT(stat, 0, BUSY_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 printk("%s: ATAPI reset complete\n", drive->name);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100975 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
978 /* continue polling */
979 return ide_started;
980 }
981 /* end of polling */
982 hwgroup->polling = 0;
983 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
984 drive->name, stat);
985 /* do it the old fashioned way */
986 return do_reset1(drive, 1);
987 }
988 /* done polling */
989 hwgroup->polling = 0;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200990 ide_complete_drive_reset(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 return ide_stopped;
992}
993
994/*
995 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
996 * during an ide reset operation. If the drives have not yet responded,
997 * and we have not yet hit our maximum waiting time, then the timer is restarted
998 * for another 50ms.
999 */
1000static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
1001{
1002 ide_hwgroup_t *hwgroup = HWGROUP(drive);
1003 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001004 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001005 u8 tmp;
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001006 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001008 if (port_ops && port_ops->reset_poll) {
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001009 err = port_ops->reset_poll(drive);
1010 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
1012 hwif->name, drive->name);
Elias Oltmanns79e36a92008-07-16 20:33:48 +02001013 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 }
1015 }
1016
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +02001017 tmp = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +01001018
1019 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1022 /* continue polling */
1023 return ide_started;
1024 }
1025 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1026 drive->failures++;
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001027 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 } else {
1029 printk("%s: reset: ", hwif->name);
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +01001030 tmp = ide_read_error(drive);
1031
1032 if (tmp == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 printk("success\n");
1034 drive->failures = 0;
1035 } else {
1036 drive->failures++;
1037 printk("master: ");
1038 switch (tmp & 0x7f) {
1039 case 1: printk("passed");
1040 break;
1041 case 2: printk("formatter device error");
1042 break;
1043 case 3: printk("sector buffer error");
1044 break;
1045 case 4: printk("ECC circuitry error");
1046 break;
1047 case 5: printk("controlling MPU error");
1048 break;
1049 default:printk("error (0x%02x?)", tmp);
1050 }
1051 if (tmp & 0x80)
1052 printk("; slave: failed");
1053 printk("\n");
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001054 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055 }
1056 }
Elias Oltmanns79e36a92008-07-16 20:33:48 +02001057out:
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001058 hwgroup->polling = 0; /* done polling */
1059 ide_complete_drive_reset(drive, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 return ide_stopped;
1061}
1062
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063static void ide_disk_pre_reset(ide_drive_t *drive)
1064{
1065 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1066
1067 drive->special.all = 0;
1068 drive->special.b.set_geometry = legacy;
1069 drive->special.b.recalibrate = legacy;
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +01001070 drive->mult_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071 if (!drive->keep_settings && !drive->using_dma)
1072 drive->mult_req = 0;
1073 if (drive->mult_req != drive->mult_count)
1074 drive->special.b.set_multmode = 1;
1075}
1076
1077static void pre_reset(ide_drive_t *drive)
1078{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001079 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1080
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 if (drive->media == ide_disk)
1082 ide_disk_pre_reset(drive);
1083 else
1084 drive->post_reset = 1;
1085
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001086 if (drive->using_dma) {
1087 if (drive->crc_count)
Bartlomiej Zolnierkiewicz578cfa02008-02-02 19:56:47 +01001088 ide_check_dma_crc(drive);
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001089 else
1090 ide_dma_off(drive);
1091 }
1092
1093 if (!drive->keep_settings) {
1094 if (!drive->using_dma) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 drive->unmask = 0;
1096 drive->io_32bit = 0;
1097 }
1098 return;
1099 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001101 if (port_ops && port_ops->pre_reset)
1102 port_ops->pre_reset(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
Suleiman Souhlal513daad2007-03-26 23:03:20 +02001104 if (drive->current_speed != 0xff)
1105 drive->desired_speed = drive->current_speed;
1106 drive->current_speed = 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107}
1108
1109/*
1110 * do_reset1() attempts to recover a confused drive by resetting it.
1111 * Unfortunately, resetting a disk drive actually resets all devices on
1112 * the same interface, so it can really be thought of as resetting the
1113 * interface rather than resetting the drive.
1114 *
1115 * ATAPI devices have their own reset mechanism which allows them to be
1116 * individually reset without clobbering other devices on the same interface.
1117 *
1118 * Unfortunately, the IDE interface does not generate an interrupt to let
1119 * us know when the reset operation has finished, so we must poll for this.
1120 * Equally poor, though, is the fact that this may a very long time to complete,
1121 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1122 * we set a timer to poll at 50ms intervals.
1123 */
1124static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1125{
1126 unsigned int unit;
1127 unsigned long flags;
1128 ide_hwif_t *hwif;
1129 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001130 struct ide_io_ports *io_ports;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001131 const struct ide_port_ops *port_ops;
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001132 u8 ctl;
1133
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 spin_lock_irqsave(&ide_lock, flags);
1135 hwif = HWIF(drive);
1136 hwgroup = HWGROUP(drive);
1137
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001138 io_ports = &hwif->io_ports;
1139
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 /* We must not reset with running handlers */
Eric Sesterhenn125e1872006-06-23 02:06:06 -07001141 BUG_ON(hwgroup->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142
1143 /* For an ATAPI device, first try an ATAPI SRST. */
1144 if (drive->media != ide_disk && !do_not_try_atapi) {
1145 pre_reset(drive);
1146 SELECT_DRIVE(drive);
1147 udelay (20);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +02001148 hwif->exec_command(hwif, WIN_SRST);
Alan Cox68ad9912005-06-27 15:24:25 -07001149 ndelay(400);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1151 hwgroup->polling = 1;
1152 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1153 spin_unlock_irqrestore(&ide_lock, flags);
1154 return ide_started;
1155 }
1156
1157 /*
1158 * First, reset any device state data we were maintaining
1159 * for any of the drives on this interface.
1160 */
1161 for (unit = 0; unit < MAX_DRIVES; ++unit)
1162 pre_reset(&hwif->drives[unit]);
1163
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001164 if (io_ports->ctl_addr == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 spin_unlock_irqrestore(&ide_lock, flags);
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001166 ide_complete_drive_reset(drive, -ENXIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 return ide_stopped;
1168 }
1169
1170 /*
1171 * Note that we also set nIEN while resetting the device,
1172 * to mask unwanted interrupts from the interface during the reset.
1173 * However, due to the design of PC hardware, this will cause an
1174 * immediate interrupt due to the edge transition it produces.
1175 * This single interrupt gives us a "fast poll" for drives that
1176 * recover from reset very quickly, saving us the first 50ms wait time.
1177 */
1178 /* set SRST and nIEN */
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001179 hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 /* more than enough time */
1181 udelay(10);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001182 if (drive->quirk_list == 2)
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001183 ctl = ATA_DEVCTL_OBS; /* clear SRST and nIEN */
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001184 else
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001185 ctl = ATA_DEVCTL_OBS | 2; /* clear SRST, leave nIEN */
Bartlomiej Zolnierkiewiczf8c4bd0a2008-07-15 21:21:49 +02001186 hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187 /* more than enough time */
1188 udelay(10);
1189 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1190 hwgroup->polling = 1;
1191 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1192
1193 /*
1194 * Some weird controller like resetting themselves to a strange
1195 * state when the disks are reset this way. At least, the Winbond
1196 * 553 documentation says that
1197 */
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001198 port_ops = hwif->port_ops;
1199 if (port_ops && port_ops->resetproc)
1200 port_ops->resetproc(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201
1202 spin_unlock_irqrestore(&ide_lock, flags);
1203 return ide_started;
1204}
1205
1206/*
1207 * ide_do_reset() is the entry point to the drive/interface reset code.
1208 */
1209
1210ide_startstop_t ide_do_reset (ide_drive_t *drive)
1211{
1212 return do_reset1(drive, 0);
1213}
1214
1215EXPORT_SYMBOL(ide_do_reset);
1216
1217/*
1218 * ide_wait_not_busy() waits for the currently selected device on the hwif
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +01001219 * to report a non-busy status, see comments in ide_probe_port().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220 */
1221int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1222{
1223 u8 stat = 0;
1224
1225 while(timeout--) {
1226 /*
1227 * Turn this into a schedule() sleep once I'm sure
1228 * about locking issues (2.5 work ?).
1229 */
1230 mdelay(1);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +02001231 stat = hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 if ((stat & BUSY_STAT) == 0)
1233 return 0;
1234 /*
1235 * Assume a value of 0xff means nothing is connected to
1236 * the interface and it doesn't implement the pull-down
1237 * resistor on D7.
1238 */
1239 if (stat == 0xff)
1240 return -ENODEV;
Ingo Molnar6842f8c2006-02-03 03:04:55 -08001241 touch_softlockup_watchdog();
Michal Schmidt1e862402006-07-30 03:03:29 -07001242 touch_nmi_watchdog();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 }
1244 return -EBUSY;
1245}
1246
1247EXPORT_SYMBOL_GPL(ide_wait_not_busy);
1248