blob: d8db25581909340a0ae00afa6537096e4f4380ad [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
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 Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200114static u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
115{
116 if (hwif->host_flags & IDE_HFLAG_MMIO)
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200117 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200118 else
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200119 return inb(hwif->dma_base + ATA_DMA_STATUS);
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200120}
121
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200122static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200123{
124 ide_hwif_t *hwif = drive->hwif;
125 struct ide_io_ports *io_ports = &hwif->io_ports;
126 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200127 void (*tf_outb)(u8 addr, unsigned long port);
128 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200129 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
130
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200131 if (mmio)
132 tf_outb = ide_mm_outb;
133 else
134 tf_outb = ide_outb;
135
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200136 if (task->tf_flags & IDE_TFLAG_FLAGGED)
137 HIHI = 0xFF;
138
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200139 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
140 u16 data = (tf->hob_data << 8) | tf->data;
141
142 if (mmio)
143 writew(data, (void __iomem *)io_ports->data_addr);
144 else
145 outw(data, io_ports->data_addr);
146 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200147
148 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200149 tf_outb(tf->hob_feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200150 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200151 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200152 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200153 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200154 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200155 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200156 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200157 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200158
159 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200160 tf_outb(tf->feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200161 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200162 tf_outb(tf->nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200163 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200164 tf_outb(tf->lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200165 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200166 tf_outb(tf->lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200167 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200168 tf_outb(tf->lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200169
170 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200171 tf_outb((tf->device & HIHI) | drive->select.all,
172 io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200173}
174
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200175static void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200176{
177 ide_hwif_t *hwif = drive->hwif;
178 struct ide_io_ports *io_ports = &hwif->io_ports;
179 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200180 void (*tf_outb)(u8 addr, unsigned long port);
181 u8 (*tf_inb)(unsigned long port);
182 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
183
184 if (mmio) {
185 tf_outb = ide_mm_outb;
186 tf_inb = ide_mm_inb;
187 } else {
188 tf_outb = ide_outb;
189 tf_inb = ide_inb;
190 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200191
192 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200193 u16 data;
194
195 if (mmio)
196 data = readw((void __iomem *)io_ports->data_addr);
197 else
198 data = inw(io_ports->data_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200199
200 tf->data = data & 0xff;
201 tf->hob_data = (data >> 8) & 0xff;
202 }
203
204 /* be sure we're looking at the low order bits */
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +0200205 tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200206
207 if (task->tf_flags & IDE_TFLAG_IN_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200208 tf->nsect = tf_inb(io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200209 if (task->tf_flags & IDE_TFLAG_IN_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200210 tf->lbal = tf_inb(io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200211 if (task->tf_flags & IDE_TFLAG_IN_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200212 tf->lbam = tf_inb(io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200213 if (task->tf_flags & IDE_TFLAG_IN_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200214 tf->lbah = tf_inb(io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200215 if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200216 tf->device = tf_inb(io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200217
218 if (task->tf_flags & IDE_TFLAG_LBA48) {
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +0200219 tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200220
221 if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200222 tf->hob_feature = tf_inb(io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200223 if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200224 tf->hob_nsect = tf_inb(io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200225 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200226 tf->hob_lbal = tf_inb(io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200227 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200228 tf->hob_lbam = tf_inb(io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200229 if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200230 tf->hob_lbah = tf_inb(io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200231 }
232}
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234/*
235 * Some localbus EIDE interfaces require a special access sequence
236 * when using 32-bit I/O instructions to transfer data. We call this
237 * the "vlb_sync" sequence, which consists of three successive reads
238 * of the sector count register location, with interrupts disabled
239 * to ensure that the reads all happen together.
240 */
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200241static void ata_vlb_sync(unsigned long port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242{
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200243 (void)inb(port);
244 (void)inb(port);
245 (void)inb(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
248/*
249 * This is used for most PIO data transfers *from* the IDE interface
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200250 *
251 * These routines will round up any request for an odd number of bytes,
252 * so if an odd len is specified, be sure that there's at least one
253 * extra byte allocated for the buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 */
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200255static void ata_input_data(ide_drive_t *drive, struct request *rq,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200256 void *buf, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200258 ide_hwif_t *hwif = drive->hwif;
259 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200260 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200261 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200262 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200264 len++;
265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200267 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200268
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200269 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200271 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200272 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200273
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200274 if (mmio)
275 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
276 else
277 insl(data_addr, buf, len / 4);
278
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200279 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200280 local_irq_restore(flags);
281
282 if ((len & 3) >= 2) {
283 if (mmio)
284 __ide_mm_insw((void __iomem *)data_addr,
285 (u8 *)buf + (len & ~3), 1);
286 else
287 insw(data_addr, (u8 *)buf + (len & ~3), 1);
288 }
289 } else {
290 if (mmio)
291 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
292 else
293 insw(data_addr, buf, len / 2);
294 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295}
296
297/*
298 * This is used for most PIO data transfers *to* the IDE interface
299 */
Bartlomiej Zolnierkiewicz92d3ab22008-04-28 23:44:36 +0200300static void ata_output_data(ide_drive_t *drive, struct request *rq,
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200301 void *buf, unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200303 ide_hwif_t *hwif = drive->hwif;
304 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200305 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200306 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200307 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200310 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200311
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200312 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200314 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200315 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200316
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200317 if (mmio)
318 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
319 else
320 outsl(data_addr, buf, len / 4);
321
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200322 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200323 local_irq_restore(flags);
324
325 if ((len & 3) >= 2) {
326 if (mmio)
327 __ide_mm_outsw((void __iomem *)data_addr,
328 (u8 *)buf + (len & ~3), 1);
329 else
330 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
331 }
332 } else {
333 if (mmio)
334 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
335 else
336 outsw(data_addr, buf, len / 2);
337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339
340void default_hwif_transport(ide_hwif_t *hwif)
341{
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200342 hwif->exec_command = ide_exec_command;
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200343 hwif->read_sff_dma_status = ide_read_sff_dma_status;
344
Bartlomiej Zolnierkiewicz94cd5b62008-04-28 23:44:40 +0200345 hwif->tf_load = ide_tf_load;
346 hwif->tf_read = ide_tf_read;
347
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200348 hwif->input_data = ata_input_data;
349 hwif->output_data = ata_output_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350}
351
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352void ide_fix_driveid (struct hd_driveid *id)
353{
354#ifndef __LITTLE_ENDIAN
355# ifdef __BIG_ENDIAN
356 int i;
357 u16 *stringcast;
358
359 id->config = __le16_to_cpu(id->config);
360 id->cyls = __le16_to_cpu(id->cyls);
361 id->reserved2 = __le16_to_cpu(id->reserved2);
362 id->heads = __le16_to_cpu(id->heads);
363 id->track_bytes = __le16_to_cpu(id->track_bytes);
364 id->sector_bytes = __le16_to_cpu(id->sector_bytes);
365 id->sectors = __le16_to_cpu(id->sectors);
366 id->vendor0 = __le16_to_cpu(id->vendor0);
367 id->vendor1 = __le16_to_cpu(id->vendor1);
368 id->vendor2 = __le16_to_cpu(id->vendor2);
369 stringcast = (u16 *)&id->serial_no[0];
370 for (i = 0; i < (20/2); i++)
371 stringcast[i] = __le16_to_cpu(stringcast[i]);
372 id->buf_type = __le16_to_cpu(id->buf_type);
373 id->buf_size = __le16_to_cpu(id->buf_size);
374 id->ecc_bytes = __le16_to_cpu(id->ecc_bytes);
375 stringcast = (u16 *)&id->fw_rev[0];
376 for (i = 0; i < (8/2); i++)
377 stringcast[i] = __le16_to_cpu(stringcast[i]);
378 stringcast = (u16 *)&id->model[0];
379 for (i = 0; i < (40/2); i++)
380 stringcast[i] = __le16_to_cpu(stringcast[i]);
381 id->dword_io = __le16_to_cpu(id->dword_io);
382 id->reserved50 = __le16_to_cpu(id->reserved50);
383 id->field_valid = __le16_to_cpu(id->field_valid);
384 id->cur_cyls = __le16_to_cpu(id->cur_cyls);
385 id->cur_heads = __le16_to_cpu(id->cur_heads);
386 id->cur_sectors = __le16_to_cpu(id->cur_sectors);
387 id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0);
388 id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1);
389 id->lba_capacity = __le32_to_cpu(id->lba_capacity);
390 id->dma_1word = __le16_to_cpu(id->dma_1word);
391 id->dma_mword = __le16_to_cpu(id->dma_mword);
392 id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes);
393 id->eide_dma_min = __le16_to_cpu(id->eide_dma_min);
394 id->eide_dma_time = __le16_to_cpu(id->eide_dma_time);
395 id->eide_pio = __le16_to_cpu(id->eide_pio);
396 id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy);
397 for (i = 0; i < 2; ++i)
398 id->words69_70[i] = __le16_to_cpu(id->words69_70[i]);
399 for (i = 0; i < 4; ++i)
400 id->words71_74[i] = __le16_to_cpu(id->words71_74[i]);
401 id->queue_depth = __le16_to_cpu(id->queue_depth);
402 for (i = 0; i < 4; ++i)
403 id->words76_79[i] = __le16_to_cpu(id->words76_79[i]);
404 id->major_rev_num = __le16_to_cpu(id->major_rev_num);
405 id->minor_rev_num = __le16_to_cpu(id->minor_rev_num);
406 id->command_set_1 = __le16_to_cpu(id->command_set_1);
407 id->command_set_2 = __le16_to_cpu(id->command_set_2);
408 id->cfsse = __le16_to_cpu(id->cfsse);
409 id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1);
410 id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2);
411 id->csf_default = __le16_to_cpu(id->csf_default);
412 id->dma_ultra = __le16_to_cpu(id->dma_ultra);
413 id->trseuc = __le16_to_cpu(id->trseuc);
414 id->trsEuc = __le16_to_cpu(id->trsEuc);
415 id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues);
416 id->mprc = __le16_to_cpu(id->mprc);
417 id->hw_config = __le16_to_cpu(id->hw_config);
418 id->acoustic = __le16_to_cpu(id->acoustic);
419 id->msrqs = __le16_to_cpu(id->msrqs);
420 id->sxfert = __le16_to_cpu(id->sxfert);
421 id->sal = __le16_to_cpu(id->sal);
422 id->spg = __le32_to_cpu(id->spg);
423 id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2);
424 for (i = 0; i < 22; i++)
425 id->words104_125[i] = __le16_to_cpu(id->words104_125[i]);
426 id->last_lun = __le16_to_cpu(id->last_lun);
427 id->word127 = __le16_to_cpu(id->word127);
428 id->dlf = __le16_to_cpu(id->dlf);
429 id->csfo = __le16_to_cpu(id->csfo);
430 for (i = 0; i < 26; i++)
431 id->words130_155[i] = __le16_to_cpu(id->words130_155[i]);
432 id->word156 = __le16_to_cpu(id->word156);
433 for (i = 0; i < 3; i++)
434 id->words157_159[i] = __le16_to_cpu(id->words157_159[i]);
435 id->cfa_power = __le16_to_cpu(id->cfa_power);
436 for (i = 0; i < 14; i++)
437 id->words161_175[i] = __le16_to_cpu(id->words161_175[i]);
438 for (i = 0; i < 31; i++)
439 id->words176_205[i] = __le16_to_cpu(id->words176_205[i]);
440 for (i = 0; i < 48; i++)
441 id->words206_254[i] = __le16_to_cpu(id->words206_254[i]);
442 id->integrity_word = __le16_to_cpu(id->integrity_word);
443# else
444# error "Please fix <asm/byteorder.h>"
445# endif
446#endif
447}
448
Bartlomiej Zolnierkiewicz01745112007-11-05 21:42:29 +0100449/*
450 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
451 * removing leading/trailing blanks and compressing internal blanks.
452 * It is primarily used to tidy up the model name/number fields as
453 * returned by the WIN_[P]IDENTIFY commands.
454 */
455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
457{
458 u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */
459
460 if (byteswap) {
461 /* convert from big-endian to host byte order */
462 for (p = end ; p != s;) {
463 unsigned short *pp = (unsigned short *) (p -= 2);
464 *pp = ntohs(*pp);
465 }
466 }
467 /* strip leading blanks */
468 while (s != end && *s == ' ')
469 ++s;
470 /* compress internal blanks and strip trailing blanks */
471 while (s != end && *s) {
472 if (*s++ != ' ' || (s != end && *s && *s != ' '))
473 *p++ = *(s-1);
474 }
475 /* wipe out trailing garbage */
476 while (p != end)
477 *p++ = '\0';
478}
479
480EXPORT_SYMBOL(ide_fixstring);
481
482/*
483 * Needed for PCI irq sharing
484 */
485int drive_is_ready (ide_drive_t *drive)
486{
487 ide_hwif_t *hwif = HWIF(drive);
488 u8 stat = 0;
489
490 if (drive->waiting_for_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200491 return hwif->dma_ops->dma_test_irq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492
493#if 0
494 /* need to guarantee 400ns since last command was issued */
495 udelay(1);
496#endif
497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /*
499 * We do a passive status test under shared PCI interrupts on
500 * cards that truly share the ATA side interrupt, but may also share
501 * an interrupt with another pci card/device. We make no assumptions
502 * about possible isa-pnp and pci-pnp issues yet.
503 */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200504 if (hwif->io_ports.ctl_addr)
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100505 stat = ide_read_altstatus(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 /* Note: this may clear a pending IRQ!! */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100508 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510 if (stat & BUSY_STAT)
511 /* drive busy: definitely not interrupting */
512 return 0;
513
514 /* drive ready: *might* be interrupting */
515 return 1;
516}
517
518EXPORT_SYMBOL(drive_is_ready);
519
520/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 * This routine busy-waits for the drive status to be not "busy".
522 * It then checks the status for all of the "good" bits and none
523 * of the "bad" bits, and if all is okay it returns 0. All other
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200524 * cases return error -- caller may then invoke ide_error().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 *
526 * This routine should get fixed to not hog the cpu during extra long waits..
527 * That could be done by busy-waiting for the first jiffy or two, and then
528 * setting a timer to wake up at half second intervals thereafter,
529 * until timeout is achieved, before timing out.
530 */
Bartlomiej Zolnierkiewiczaedea592007-10-13 17:47:50 +0200531static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 unsigned long flags;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200534 int i;
535 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100538 stat = ide_read_status(drive);
539
540 if (stat & BUSY_STAT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 local_irq_set(flags);
542 timeout += jiffies;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100543 while ((stat = ide_read_status(drive)) & BUSY_STAT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 if (time_after(jiffies, timeout)) {
545 /*
546 * One last read after the timeout in case
547 * heavy interrupt load made us not make any
548 * progress during the timeout..
549 */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100550 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 if (!(stat & BUSY_STAT))
552 break;
553
554 local_irq_restore(flags);
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200555 *rstat = stat;
556 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 }
558 }
559 local_irq_restore(flags);
560 }
561 /*
562 * Allow status to settle, then read it again.
563 * A few rare drives vastly violate the 400ns spec here,
564 * so we'll wait up to 10usec for a "good" status
565 * rather than expensively fail things immediately.
566 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
567 */
568 for (i = 0; i < 10; i++) {
569 udelay(1);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100570 stat = ide_read_status(drive);
571
572 if (OK_STAT(stat, good, bad)) {
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200573 *rstat = stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 return 0;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200575 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 }
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200577 *rstat = stat;
578 return -EFAULT;
579}
580
581/*
582 * In case of error returns error value after doing "*startstop = ide_error()".
583 * The caller should return the updated value of "startstop" in this case,
584 * "startstop" is unchanged when the function returns 0.
585 */
586int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
587{
588 int err;
589 u8 stat;
590
591 /* bail early if we've exceeded max_failures */
592 if (drive->max_failures && (drive->failures > drive->max_failures)) {
593 *startstop = ide_stopped;
594 return 1;
595 }
596
597 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
598
599 if (err) {
600 char *s = (err == -EBUSY) ? "status timeout" : "status error";
601 *startstop = ide_error(drive, s, stat);
602 }
603
604 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605}
606
607EXPORT_SYMBOL(ide_wait_stat);
608
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200609/**
610 * ide_in_drive_list - look for drive in black/white list
611 * @id: drive identifier
612 * @drive_table: list to inspect
613 *
614 * Look for a drive in the blacklist and the whitelist tables
615 * Returns 1 if the drive is found in the table.
616 */
617
618int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table)
619{
620 for ( ; drive_table->id_model; drive_table++)
621 if ((!strcmp(drive_table->id_model, id->model)) &&
622 (!drive_table->id_firmware ||
623 strstr(id->fw_rev, drive_table->id_firmware)))
624 return 1;
625 return 0;
626}
627
Bartlomiej Zolnierkiewiczb0244a02007-08-20 22:42:57 +0200628EXPORT_SYMBOL_GPL(ide_in_drive_list);
629
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200630/*
631 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
632 * We list them here and depend on the device side cable detection for them.
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200633 *
634 * Some optical devices with the buggy firmwares have the same problem.
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200635 */
636static const struct drive_list_entry ivb_list[] = {
637 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200638 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
Peter Missele97564f2007-11-27 21:35:57 +0100639 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
640 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
641 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
Alexander Smal3ced5c42008-04-28 23:44:43 +0200642 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
643 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200644 { NULL , NULL }
645};
646
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647/*
648 * All hosts that use the 80c ribbon must use!
649 * The name is derived from upper byte of word 93 and the 80c ribbon.
650 */
651u8 eighty_ninty_three (ide_drive_t *drive)
652{
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200653 ide_hwif_t *hwif = drive->hwif;
654 struct hd_driveid *id = drive->id;
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200655 int ivb = ide_in_drive_list(id, ivb_list);
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200656
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200657 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
658 return 1;
659
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200660 if (ivb)
661 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
662 drive->name);
663
George Kibardinb98f8802008-01-10 23:03:42 +0100664 if (ide_dev_is_sata(id) && !ivb)
665 return 1;
666
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200667 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200668 goto no_80w;
Alan Cox1a1276e2006-06-28 04:26:58 -0700669
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200670 /*
671 * FIXME:
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100672 * - change master/slave IDENTIFY order
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200673 * - force bit13 (80c cable present) check also for !ivb devices
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200674 * (unless the slave device is pre-ATA3)
675 */
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200676 if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000)))
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200677 return 1;
678
679no_80w:
680 if (drive->udma33_warned == 1)
681 return 0;
682
683 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
684 "limiting max speed to UDMA33\n",
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200685 drive->name,
686 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200687
688 drive->udma33_warned = 1;
689
690 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691}
692
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200693int ide_driveid_update(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694{
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200695 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 struct hd_driveid *id;
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200697 unsigned long timeout, flags;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100698 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 /*
701 * Re-read drive->id for possible DMA mode
702 * change (copied from ide-probe.c)
703 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704
705 SELECT_MASK(drive, 1);
Mikhail Cherkashin5ddee512008-07-15 21:21:40 +0200706 ide_set_irq(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 msleep(50);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200708 hwif->exec_command(hwif, WIN_IDENTIFY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 timeout = jiffies + WAIT_WORSTCASE;
710 do {
711 if (time_after(jiffies, timeout)) {
712 SELECT_MASK(drive, 0);
713 return 0; /* drive timed-out */
714 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 msleep(50); /* give drive a breather */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100717 stat = ide_read_altstatus(drive);
718 } while (stat & BUSY_STAT);
719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 msleep(50); /* wait for IRQ and DRQ_STAT */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100721 stat = ide_read_status(drive);
722
723 if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 SELECT_MASK(drive, 0);
725 printk("%s: CHECK for good STATUS\n", drive->name);
726 return 0;
727 }
728 local_irq_save(flags);
729 SELECT_MASK(drive, 0);
730 id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC);
731 if (!id) {
732 local_irq_restore(flags);
733 return 0;
734 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200735 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100736 (void)ide_read_status(drive); /* clear drive IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 local_irq_enable();
738 local_irq_restore(flags);
739 ide_fix_driveid(id);
740 if (id) {
741 drive->id->dma_ultra = id->dma_ultra;
742 drive->id->dma_mword = id->dma_mword;
743 drive->id->dma_1word = id->dma_1word;
744 /* anything more ? */
745 kfree(id);
Bartlomiej Zolnierkiewicz3ab7efe2007-12-12 23:31:58 +0100746
747 if (drive->using_dma && ide_id_dma_bug(drive))
748 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 }
750
751 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752}
753
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200754int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755{
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200756 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200757 struct ide_io_ports *io_ports = &hwif->io_ports;
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100758 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 u8 stat;
760
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200762 if (hwif->dma_ops) /* check if host supports DMA */
763 hwif->dma_ops->dma_host_set(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764#endif
765
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100766 /* Skip setting PIO flow-control modes on pre-EIDE drives */
767 if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08))
768 goto skip;
769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 /*
771 * Don't use ide_wait_cmd here - it will
772 * attempt to set_geometry and recalibrate,
773 * but for some reason these don't work at
774 * this point (lost interrupt).
775 */
776 /*
777 * Select the drive, and issue the SETFEATURES command
778 */
779 disable_irq_nosync(hwif->irq);
780
781 /*
782 * FIXME: we race against the running IRQ here if
783 * this is called from non IRQ context. If we use
784 * disable_irq() we hang on the error path. Work
785 * is needed.
786 */
787
788 udelay(1);
789 SELECT_DRIVE(drive);
790 SELECT_MASK(drive, 0);
791 udelay(1);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100792 ide_set_irq(drive, 0);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200793 hwif->OUTB(speed, io_ports->nsect_addr);
794 hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200795 hwif->exec_command(hwif, WIN_SETFEATURES);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100796 if (drive->quirk_list == 2)
797 ide_set_irq(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200799 error = __ide_wait_stat(drive, drive->ready_stat,
800 BUSY_STAT|DRQ_STAT|ERR_STAT,
801 WAIT_CMD, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802
803 SELECT_MASK(drive, 0);
804
805 enable_irq(hwif->irq);
806
807 if (error) {
808 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
809 return error;
810 }
811
812 drive->id->dma_ultra &= ~0xFF00;
813 drive->id->dma_mword &= ~0x0F00;
814 drive->id->dma_1word &= ~0x0F00;
815
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100816 skip:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewiczf37aaf92008-01-26 20:13:02 +0100818 if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) &&
819 drive->using_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200820 hwif->dma_ops->dma_host_set(drive, 1);
821 else if (hwif->dma_ops) /* check if host supports DMA */
Bartlomiej Zolnierkiewicz4a546e02008-01-26 20:13:01 +0100822 ide_dma_off_quietly(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823#endif
824
825 switch(speed) {
826 case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break;
827 case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break;
828 case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break;
829 case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break;
830 case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break;
831 case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break;
832 case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break;
833 case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break;
834 case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break;
835 case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break;
836 case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break;
837 case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break;
838 case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break;
839 case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break;
840 default: break;
841 }
842 if (!drive->init_speed)
843 drive->init_speed = speed;
844 drive->current_speed = speed;
845 return error;
846}
847
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848/*
849 * This should get invoked any time we exit the driver to
850 * wait for an interrupt response from a drive. handler() points
851 * at the appropriate code to handle the next interrupt, and a
852 * timer is started to prevent us from waiting forever in case
853 * something goes wrong (see the ide_timer_expiry() handler later on).
854 *
855 * See also ide_execute_command
856 */
857static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
858 unsigned int timeout, ide_expiry_t *expiry)
859{
860 ide_hwgroup_t *hwgroup = HWGROUP(drive);
861
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100862 BUG_ON(hwgroup->handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 hwgroup->handler = handler;
864 hwgroup->expiry = expiry;
865 hwgroup->timer.expires = jiffies + timeout;
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100866 hwgroup->req_gen_timer = hwgroup->req_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 add_timer(&hwgroup->timer);
868}
869
870void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
871 unsigned int timeout, ide_expiry_t *expiry)
872{
873 unsigned long flags;
874 spin_lock_irqsave(&ide_lock, flags);
875 __ide_set_handler(drive, handler, timeout, expiry);
876 spin_unlock_irqrestore(&ide_lock, flags);
877}
878
879EXPORT_SYMBOL(ide_set_handler);
880
881/**
882 * ide_execute_command - execute an IDE command
883 * @drive: IDE drive to issue the command against
884 * @command: command byte to write
885 * @handler: handler for next phase
886 * @timeout: timeout for command
887 * @expiry: handler to run on timeout
888 *
889 * Helper function to issue an IDE command. This handles the
890 * atomicity requirements, command timing and ensures that the
891 * handler and IRQ setup do not race. All IDE command kick off
892 * should go via this function or do equivalent locking.
893 */
Bartlomiej Zolnierkiewiczcd2a2d92008-01-25 22:17:06 +0100894
895void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
896 unsigned timeout, ide_expiry_t *expiry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897{
898 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100900
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100902 __ide_set_handler(drive, handler, timeout, expiry);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200903 hwif->exec_command(hwif, cmd);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100904 /*
905 * Drive takes 400nS to respond, we must avoid the IRQ being
906 * serviced before that.
907 *
908 * FIXME: we could skip this delay with care on non shared devices
909 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 ndelay(400);
911 spin_unlock_irqrestore(&ide_lock, flags);
912}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913EXPORT_SYMBOL(ide_execute_command);
914
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200915void ide_execute_pkt_cmd(ide_drive_t *drive)
916{
917 ide_hwif_t *hwif = drive->hwif;
918 unsigned long flags;
919
920 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200921 hwif->exec_command(hwif, WIN_PACKETCMD);
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200922 ndelay(400);
923 spin_unlock_irqrestore(&ide_lock, flags);
924}
925EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700926
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200927static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200928{
929 struct request *rq = drive->hwif->hwgroup->rq;
930
931 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200932 ide_end_request(drive, err ? err : 1, 0);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200933}
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935/* needed below */
936static ide_startstop_t do_reset1 (ide_drive_t *, int);
937
938/*
939 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
940 * during an atapi drive reset operation. If the drive has not yet responded,
941 * and we have not yet hit our maximum waiting time, then the timer is restarted
942 * for another 50ms.
943 */
944static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
945{
946 ide_hwgroup_t *hwgroup = HWGROUP(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947 u8 stat;
948
949 SELECT_DRIVE(drive);
950 udelay (10);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100951 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100953 if (OK_STAT(stat, 0, BUSY_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 printk("%s: ATAPI reset complete\n", drive->name);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100955 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
958 /* continue polling */
959 return ide_started;
960 }
961 /* end of polling */
962 hwgroup->polling = 0;
963 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
964 drive->name, stat);
965 /* do it the old fashioned way */
966 return do_reset1(drive, 1);
967 }
968 /* done polling */
969 hwgroup->polling = 0;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200970 ide_complete_drive_reset(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 return ide_stopped;
972}
973
974/*
975 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
976 * during an ide reset operation. If the drives have not yet responded,
977 * and we have not yet hit our maximum waiting time, then the timer is restarted
978 * for another 50ms.
979 */
980static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
981{
982 ide_hwgroup_t *hwgroup = HWGROUP(drive);
983 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200984 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 u8 tmp;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200986 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200988 if (port_ops && port_ops->reset_poll) {
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200989 err = port_ops->reset_poll(drive);
990 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
992 hwif->name, drive->name);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200993 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 }
995 }
996
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100997 tmp = ide_read_status(drive);
998
999 if (!OK_STAT(tmp, 0, BUSY_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1002 /* continue polling */
1003 return ide_started;
1004 }
1005 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
1006 drive->failures++;
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001007 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 } else {
1009 printk("%s: reset: ", hwif->name);
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +01001010 tmp = ide_read_error(drive);
1011
1012 if (tmp == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 printk("success\n");
1014 drive->failures = 0;
1015 } else {
1016 drive->failures++;
1017 printk("master: ");
1018 switch (tmp & 0x7f) {
1019 case 1: printk("passed");
1020 break;
1021 case 2: printk("formatter device error");
1022 break;
1023 case 3: printk("sector buffer error");
1024 break;
1025 case 4: printk("ECC circuitry error");
1026 break;
1027 case 5: printk("controlling MPU error");
1028 break;
1029 default:printk("error (0x%02x?)", tmp);
1030 }
1031 if (tmp & 0x80)
1032 printk("; slave: failed");
1033 printk("\n");
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001034 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 }
1036 }
Elias Oltmanns79e36a92008-07-16 20:33:48 +02001037out:
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001038 hwgroup->polling = 0; /* done polling */
1039 ide_complete_drive_reset(drive, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 return ide_stopped;
1041}
1042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043static void ide_disk_pre_reset(ide_drive_t *drive)
1044{
1045 int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
1046
1047 drive->special.all = 0;
1048 drive->special.b.set_geometry = legacy;
1049 drive->special.b.recalibrate = legacy;
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +01001050 drive->mult_count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 if (!drive->keep_settings && !drive->using_dma)
1052 drive->mult_req = 0;
1053 if (drive->mult_req != drive->mult_count)
1054 drive->special.b.set_multmode = 1;
1055}
1056
1057static void pre_reset(ide_drive_t *drive)
1058{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001059 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 if (drive->media == ide_disk)
1062 ide_disk_pre_reset(drive);
1063 else
1064 drive->post_reset = 1;
1065
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001066 if (drive->using_dma) {
1067 if (drive->crc_count)
Bartlomiej Zolnierkiewicz578cfa02008-02-02 19:56:47 +01001068 ide_check_dma_crc(drive);
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001069 else
1070 ide_dma_off(drive);
1071 }
1072
1073 if (!drive->keep_settings) {
1074 if (!drive->using_dma) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 drive->unmask = 0;
1076 drive->io_32bit = 0;
1077 }
1078 return;
1079 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001081 if (port_ops && port_ops->pre_reset)
1082 port_ops->pre_reset(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083
Suleiman Souhlal513daad2007-03-26 23:03:20 +02001084 if (drive->current_speed != 0xff)
1085 drive->desired_speed = drive->current_speed;
1086 drive->current_speed = 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087}
1088
1089/*
1090 * do_reset1() attempts to recover a confused drive by resetting it.
1091 * Unfortunately, resetting a disk drive actually resets all devices on
1092 * the same interface, so it can really be thought of as resetting the
1093 * interface rather than resetting the drive.
1094 *
1095 * ATAPI devices have their own reset mechanism which allows them to be
1096 * individually reset without clobbering other devices on the same interface.
1097 *
1098 * Unfortunately, the IDE interface does not generate an interrupt to let
1099 * us know when the reset operation has finished, so we must poll for this.
1100 * Equally poor, though, is the fact that this may a very long time to complete,
1101 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1102 * we set a timer to poll at 50ms intervals.
1103 */
1104static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1105{
1106 unsigned int unit;
1107 unsigned long flags;
1108 ide_hwif_t *hwif;
1109 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001110 struct ide_io_ports *io_ports;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001111 const struct ide_port_ops *port_ops;
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001112 u8 ctl;
1113
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 spin_lock_irqsave(&ide_lock, flags);
1115 hwif = HWIF(drive);
1116 hwgroup = HWGROUP(drive);
1117
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001118 io_ports = &hwif->io_ports;
1119
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 /* We must not reset with running handlers */
Eric Sesterhenn125e1872006-06-23 02:06:06 -07001121 BUG_ON(hwgroup->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122
1123 /* For an ATAPI device, first try an ATAPI SRST. */
1124 if (drive->media != ide_disk && !do_not_try_atapi) {
1125 pre_reset(drive);
1126 SELECT_DRIVE(drive);
1127 udelay (20);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +02001128 hwif->exec_command(hwif, WIN_SRST);
Alan Cox68ad9912005-06-27 15:24:25 -07001129 ndelay(400);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1131 hwgroup->polling = 1;
1132 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1133 spin_unlock_irqrestore(&ide_lock, flags);
1134 return ide_started;
1135 }
1136
1137 /*
1138 * First, reset any device state data we were maintaining
1139 * for any of the drives on this interface.
1140 */
1141 for (unit = 0; unit < MAX_DRIVES; ++unit)
1142 pre_reset(&hwif->drives[unit]);
1143
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001144 if (io_ports->ctl_addr == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 spin_unlock_irqrestore(&ide_lock, flags);
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001146 ide_complete_drive_reset(drive, -ENXIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 return ide_stopped;
1148 }
1149
1150 /*
1151 * Note that we also set nIEN while resetting the device,
1152 * to mask unwanted interrupts from the interface during the reset.
1153 * However, due to the design of PC hardware, this will cause an
1154 * immediate interrupt due to the edge transition it produces.
1155 * This single interrupt gives us a "fast poll" for drives that
1156 * recover from reset very quickly, saving us the first 50ms wait time.
1157 */
1158 /* set SRST and nIEN */
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001159 hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 /* more than enough time */
1161 udelay(10);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001162 if (drive->quirk_list == 2)
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001163 ctl = ATA_DEVCTL_OBS; /* clear SRST and nIEN */
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001164 else
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001165 ctl = ATA_DEVCTL_OBS | 2; /* clear SRST, leave nIEN */
Bartlomiej Zolnierkiewiczf8c4bd0a2008-07-15 21:21:49 +02001166 hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 /* more than enough time */
1168 udelay(10);
1169 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1170 hwgroup->polling = 1;
1171 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1172
1173 /*
1174 * Some weird controller like resetting themselves to a strange
1175 * state when the disks are reset this way. At least, the Winbond
1176 * 553 documentation says that
1177 */
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001178 port_ops = hwif->port_ops;
1179 if (port_ops && port_ops->resetproc)
1180 port_ops->resetproc(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181
1182 spin_unlock_irqrestore(&ide_lock, flags);
1183 return ide_started;
1184}
1185
1186/*
1187 * ide_do_reset() is the entry point to the drive/interface reset code.
1188 */
1189
1190ide_startstop_t ide_do_reset (ide_drive_t *drive)
1191{
1192 return do_reset1(drive, 0);
1193}
1194
1195EXPORT_SYMBOL(ide_do_reset);
1196
1197/*
1198 * ide_wait_not_busy() waits for the currently selected device on the hwif
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +01001199 * to report a non-busy status, see comments in ide_probe_port().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200 */
1201int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1202{
1203 u8 stat = 0;
1204
1205 while(timeout--) {
1206 /*
1207 * Turn this into a schedule() sleep once I'm sure
1208 * about locking issues (2.5 work ?).
1209 */
1210 mdelay(1);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001211 stat = hwif->INB(hwif->io_ports.status_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 if ((stat & BUSY_STAT) == 0)
1213 return 0;
1214 /*
1215 * Assume a value of 0xff means nothing is connected to
1216 * the interface and it doesn't implement the pull-down
1217 * resistor on D7.
1218 */
1219 if (stat == 0xff)
1220 return -ENODEV;
Ingo Molnar6842f8c2006-02-03 03:04:55 -08001221 touch_softlockup_watchdog();
Michal Schmidt1e862402006-07-30 03:03:29 -07001222 touch_nmi_watchdog();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 }
1224 return -EBUSY;
1225}
1226
1227EXPORT_SYMBOL_GPL(ide_wait_not_busy);
1228