blob: 6f57de85dcd9eebb09f7d6d686f00981ae0b441e [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>
Alan Coxccd32e22008-11-02 21:40:08 +01003 * Copyright (C) 2003 Red Hat
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/ide.h>
22#include <linux/bitops.h>
Michal Schmidt1e862402006-07-30 03:03:29 -070023#include <linux/nmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
25#include <asm/byteorder.h>
26#include <asm/irq.h>
27#include <asm/uaccess.h>
28#include <asm/io.h>
29
30/*
31 * Conventional PIO operations for ATA devices
32 */
33
34static u8 ide_inb (unsigned long port)
35{
36 return (u8) inb(port);
37}
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039static void ide_outb (u8 val, unsigned long port)
40{
41 outb(val, port);
42}
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044/*
45 * MMIO operations, typically used for SATA controllers
46 */
47
48static u8 ide_mm_inb (unsigned long port)
49{
50 return (u8) readb((void __iomem *) port);
51}
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static void ide_mm_outb (u8 value, unsigned long port)
54{
55 writeb(value, (void __iomem *) port);
56}
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058void SELECT_DRIVE (ide_drive_t *drive)
59{
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +020060 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020061 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz40f095f2008-07-23 19:55:53 +020062 ide_task_t task;
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +020063
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020064 if (port_ops && port_ops->selectproc)
65 port_ops->selectproc(drive);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +020066
Bartlomiej Zolnierkiewicz40f095f2008-07-23 19:55:53 +020067 memset(&task, 0, sizeof(task));
68 task.tf_flags = IDE_TFLAG_OUT_DEVICE;
69
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020070 drive->hwif->tp_ops->tf_load(drive, &task);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071}
72
Bartlomiej Zolnierkiewiczed4af482008-07-15 21:21:48 +020073void SELECT_MASK(ide_drive_t *drive, int mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070074{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +020075 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
76
77 if (port_ops && port_ops->maskproc)
78 port_ops->maskproc(drive, mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079}
80
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020081void ide_exec_command(ide_hwif_t *hwif, u8 cmd)
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +020082{
83 if (hwif->host_flags & IDE_HFLAG_MMIO)
84 writeb(cmd, (void __iomem *)hwif->io_ports.command_addr);
85 else
86 outb(cmd, hwif->io_ports.command_addr);
87}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020088EXPORT_SYMBOL_GPL(ide_exec_command);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +020089
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020090u8 ide_read_status(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +020091{
92 if (hwif->host_flags & IDE_HFLAG_MMIO)
93 return readb((void __iomem *)hwif->io_ports.status_addr);
94 else
95 return inb(hwif->io_ports.status_addr);
96}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020097EXPORT_SYMBOL_GPL(ide_read_status);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +020098
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +020099u8 ide_read_altstatus(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200100{
101 if (hwif->host_flags & IDE_HFLAG_MMIO)
102 return readb((void __iomem *)hwif->io_ports.ctl_addr);
103 else
104 return inb(hwif->io_ports.ctl_addr);
105}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200106EXPORT_SYMBOL_GPL(ide_read_altstatus);
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200107
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200108u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200109{
110 if (hwif->host_flags & IDE_HFLAG_MMIO)
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200111 return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200112 else
Bartlomiej Zolnierkiewiczcab7f8e2008-07-23 19:55:51 +0200113 return inb(hwif->dma_base + ATA_DMA_STATUS);
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200114}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200115EXPORT_SYMBOL_GPL(ide_read_sff_dma_status);
Bartlomiej Zolnierkiewiczb2f951a2008-07-23 19:55:50 +0200116
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200117void ide_set_irq(ide_hwif_t *hwif, int on)
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +0200118{
119 u8 ctl = ATA_DEVCTL_OBS;
120
121 if (on == 4) { /* hack for SRST */
122 ctl |= 4;
123 on &= ~4;
124 }
125
126 ctl |= on ? 0 : 2;
127
128 if (hwif->host_flags & IDE_HFLAG_MMIO)
129 writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
130 else
131 outb(ctl, hwif->io_ports.ctl_addr);
132}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200133EXPORT_SYMBOL_GPL(ide_set_irq);
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +0200134
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200135void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200136{
137 ide_hwif_t *hwif = drive->hwif;
138 struct ide_io_ports *io_ports = &hwif->io_ports;
139 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200140 void (*tf_outb)(u8 addr, unsigned long port);
141 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200142 u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
143
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200144 if (mmio)
145 tf_outb = ide_mm_outb;
146 else
147 tf_outb = ide_outb;
148
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200149 if (task->tf_flags & IDE_TFLAG_FLAGGED)
150 HIHI = 0xFF;
151
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200152 if (task->tf_flags & IDE_TFLAG_OUT_DATA) {
153 u16 data = (tf->hob_data << 8) | tf->data;
154
155 if (mmio)
156 writew(data, (void __iomem *)io_ports->data_addr);
157 else
158 outw(data, io_ports->data_addr);
159 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200160
161 if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200162 tf_outb(tf->hob_feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200163 if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200164 tf_outb(tf->hob_nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200165 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200166 tf_outb(tf->hob_lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200167 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200168 tf_outb(tf->hob_lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200169 if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200170 tf_outb(tf->hob_lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200171
172 if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200173 tf_outb(tf->feature, io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200174 if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200175 tf_outb(tf->nsect, io_ports->nsect_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200176 if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200177 tf_outb(tf->lbal, io_ports->lbal_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200178 if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200179 tf_outb(tf->lbam, io_ports->lbam_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200180 if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200181 tf_outb(tf->lbah, io_ports->lbah_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200182
183 if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200184 tf_outb((tf->device & HIHI) | drive->select,
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200185 io_ports->device_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200186}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200187EXPORT_SYMBOL_GPL(ide_tf_load);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200188
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200189void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200190{
191 ide_hwif_t *hwif = drive->hwif;
192 struct ide_io_ports *io_ports = &hwif->io_ports;
193 struct ide_taskfile *tf = &task->tf;
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200194 void (*tf_outb)(u8 addr, unsigned long port);
195 u8 (*tf_inb)(unsigned long port);
196 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
197
198 if (mmio) {
199 tf_outb = ide_mm_outb;
200 tf_inb = ide_mm_inb;
201 } else {
202 tf_outb = ide_outb;
203 tf_inb = ide_inb;
204 }
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200205
206 if (task->tf_flags & IDE_TFLAG_IN_DATA) {
Bartlomiej Zolnierkiewiczca545c12008-04-28 23:44:41 +0200207 u16 data;
208
209 if (mmio)
210 data = readw((void __iomem *)io_ports->data_addr);
211 else
212 data = inw(io_ports->data_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200213
214 tf->data = data & 0xff;
215 tf->hob_data = (data >> 8) & 0xff;
216 }
217
218 /* be sure we're looking at the low order bits */
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
Bartlomiej Zolnierkiewicz92eb4382008-07-23 19:55:53 +0200221 if (task->tf_flags & IDE_TFLAG_IN_FEATURE)
222 tf->feature = tf_inb(io_ports->feature_addr);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200223 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}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200249EXPORT_SYMBOL_GPL(ide_tf_read);
Bartlomiej Zolnierkiewiczd309e0b2008-04-28 23:44:39 +0200250
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251/*
252 * Some localbus EIDE interfaces require a special access sequence
253 * when using 32-bit I/O instructions to transfer data. We call this
254 * the "vlb_sync" sequence, which consists of three successive reads
255 * of the sector count register location, with interrupts disabled
256 * to ensure that the reads all happen together.
257 */
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200258static void ata_vlb_sync(unsigned long port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200260 (void)inb(port);
261 (void)inb(port);
262 (void)inb(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263}
264
265/*
266 * This is used for most PIO data transfers *from* the IDE interface
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200267 *
268 * These routines will round up any request for an odd number of bytes,
269 * so if an odd len is specified, be sure that there's at least one
270 * extra byte allocated for the buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200272void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf,
273 unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200275 ide_hwif_t *hwif = drive->hwif;
276 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200277 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200278 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200279 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200281 len++;
282
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200284 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200285
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200286 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200288 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200289 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200290
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200291 if (mmio)
292 __ide_mm_insl((void __iomem *)data_addr, buf, len / 4);
293 else
294 insl(data_addr, buf, len / 4);
295
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200296 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200297 local_irq_restore(flags);
298
299 if ((len & 3) >= 2) {
300 if (mmio)
301 __ide_mm_insw((void __iomem *)data_addr,
302 (u8 *)buf + (len & ~3), 1);
303 else
304 insw(data_addr, (u8 *)buf + (len & ~3), 1);
305 }
306 } else {
307 if (mmio)
308 __ide_mm_insw((void __iomem *)data_addr, buf, len / 2);
309 else
310 insw(data_addr, buf, len / 2);
311 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200313EXPORT_SYMBOL_GPL(ide_input_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315/*
316 * This is used for most PIO data transfers *to* the IDE interface
317 */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200318void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf,
319 unsigned int len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200321 ide_hwif_t *hwif = drive->hwif;
322 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200323 unsigned long data_addr = io_ports->data_addr;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200324 u8 io_32bit = drive->io_32bit;
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200325 u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327 if (io_32bit) {
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200328 unsigned long uninitialized_var(flags);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200329
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200330 if ((io_32bit & 2) && !mmio) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 local_irq_save(flags);
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200332 ata_vlb_sync(io_ports->nsect_addr);
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200333 }
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200334
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200335 if (mmio)
336 __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4);
337 else
338 outsl(data_addr, buf, len / 4);
339
Bartlomiej Zolnierkiewicz22cdd6c2008-04-28 23:44:41 +0200340 if ((io_32bit & 2) && !mmio)
Bartlomiej Zolnierkiewicz16bb69c2008-04-28 23:44:37 +0200341 local_irq_restore(flags);
342
343 if ((len & 3) >= 2) {
344 if (mmio)
345 __ide_mm_outsw((void __iomem *)data_addr,
346 (u8 *)buf + (len & ~3), 1);
347 else
348 outsw(data_addr, (u8 *)buf + (len & ~3), 1);
349 }
350 } else {
351 if (mmio)
352 __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2);
353 else
354 outsw(data_addr, buf, len / 2);
355 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356}
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200357EXPORT_SYMBOL_GPL(ide_output_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Bartlomiej Zolnierkiewicz92eb4382008-07-23 19:55:53 +0200359u8 ide_read_error(ide_drive_t *drive)
360{
361 ide_task_t task;
362
363 memset(&task, 0, sizeof(task));
364 task.tf_flags = IDE_TFLAG_IN_FEATURE;
365
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200366 drive->hwif->tp_ops->tf_read(drive, &task);
Bartlomiej Zolnierkiewicz92eb4382008-07-23 19:55:53 +0200367
368 return task.tf.error;
369}
370EXPORT_SYMBOL_GPL(ide_read_error);
371
Bartlomiej Zolnierkiewicz18236492008-07-23 19:55:54 +0200372void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason)
373{
374 ide_task_t task;
375
376 memset(&task, 0, sizeof(task));
377 task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM |
378 IDE_TFLAG_IN_NSECT;
379
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200380 drive->hwif->tp_ops->tf_read(drive, &task);
Bartlomiej Zolnierkiewicz18236492008-07-23 19:55:54 +0200381
382 *bcount = (task.tf.lbah << 8) | task.tf.lbam;
383 *ireason = task.tf.nsect & 3;
384}
385EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason);
386
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200387const struct ide_tp_ops default_tp_ops = {
388 .exec_command = ide_exec_command,
389 .read_status = ide_read_status,
390 .read_altstatus = ide_read_altstatus,
391 .read_sff_dma_status = ide_read_sff_dma_status,
392
393 .set_irq = ide_set_irq,
394
395 .tf_load = ide_tf_load,
396 .tf_read = ide_tf_read,
397
398 .input_data = ide_input_data,
399 .output_data = ide_output_data,
400};
401
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200402void ide_fix_driveid(u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403{
404#ifndef __LITTLE_ENDIAN
405# ifdef __BIG_ENDIAN
406 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200408 for (i = 0; i < 256; i++)
Bartlomiej Zolnierkiewicz5b90e992008-10-10 22:39:18 +0200409 id[i] = __le16_to_cpu(id[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410# else
411# error "Please fix <asm/byteorder.h>"
412# endif
413#endif
414}
415
Bartlomiej Zolnierkiewicz01745112007-11-05 21:42:29 +0100416/*
417 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
418 * removing leading/trailing blanks and compressing internal blanks.
419 * It is primarily used to tidy up the model name/number fields as
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200420 * returned by the ATA_CMD_ID_ATA[PI] commands.
Bartlomiej Zolnierkiewicz01745112007-11-05 21:42:29 +0100421 */
422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423void ide_fixstring (u8 *s, const int bytecount, const int byteswap)
424{
Linus Torvalds1a7809e2008-10-10 22:39:22 +0200425 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
427 if (byteswap) {
428 /* convert from big-endian to host byte order */
Linus Torvalds1a7809e2008-10-10 22:39:22 +0200429 for (p = s ; p != end ; p += 2)
430 be16_to_cpus((u16 *) p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 }
Linus Torvalds1a7809e2008-10-10 22:39:22 +0200432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 /* strip leading blanks */
Linus Torvalds1a7809e2008-10-10 22:39:22 +0200434 p = s;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 while (s != end && *s == ' ')
436 ++s;
437 /* compress internal blanks and strip trailing blanks */
438 while (s != end && *s) {
439 if (*s++ != ' ' || (s != end && *s && *s != ' '))
440 *p++ = *(s-1);
441 }
442 /* wipe out trailing garbage */
443 while (p != end)
444 *p++ = '\0';
445}
446
447EXPORT_SYMBOL(ide_fixstring);
448
449/*
450 * Needed for PCI irq sharing
451 */
452int drive_is_ready (ide_drive_t *drive)
453{
454 ide_hwif_t *hwif = HWIF(drive);
455 u8 stat = 0;
456
457 if (drive->waiting_for_dma)
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200458 return hwif->dma_ops->dma_test_irq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460#if 0
461 /* need to guarantee 400ns since last command was issued */
462 udelay(1);
463#endif
464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 /*
466 * We do a passive status test under shared PCI interrupts on
467 * cards that truly share the ATA side interrupt, but may also share
468 * an interrupt with another pci card/device. We make no assumptions
469 * about possible isa-pnp and pci-pnp issues yet.
470 */
Bartlomiej Zolnierkiewicz66364872008-12-02 20:40:03 +0100471 if (hwif->io_ports.ctl_addr &&
472 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200473 stat = hwif->tp_ops->read_altstatus(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 /* Note: this may clear a pending IRQ!! */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200476 stat = hwif->tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200478 if (stat & ATA_BUSY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 /* drive busy: definitely not interrupting */
480 return 0;
481
482 /* drive ready: *might* be interrupting */
483 return 1;
484}
485
486EXPORT_SYMBOL(drive_is_ready);
487
488/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 * This routine busy-waits for the drive status to be not "busy".
490 * It then checks the status for all of the "good" bits and none
491 * of the "bad" bits, and if all is okay it returns 0. All other
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200492 * cases return error -- caller may then invoke ide_error().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 *
494 * This routine should get fixed to not hog the cpu during extra long waits..
495 * That could be done by busy-waiting for the first jiffy or two, and then
496 * setting a timer to wake up at half second intervals thereafter,
497 * until timeout is achieved, before timing out.
498 */
Bartlomiej Zolnierkiewiczaedea592007-10-13 17:47:50 +0200499static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500{
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200501 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200502 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 unsigned long flags;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200504 int i;
505 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506
507 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200508 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100509
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200510 if (stat & ATA_BUSY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 local_irq_set(flags);
512 timeout += jiffies;
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200513 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 if (time_after(jiffies, timeout)) {
515 /*
516 * One last read after the timeout in case
517 * heavy interrupt load made us not make any
518 * progress during the timeout..
519 */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200520 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200521 if ((stat & ATA_BUSY) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 break;
523
524 local_irq_restore(flags);
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200525 *rstat = stat;
526 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 }
528 }
529 local_irq_restore(flags);
530 }
531 /*
532 * Allow status to settle, then read it again.
533 * A few rare drives vastly violate the 400ns spec here,
534 * so we'll wait up to 10usec for a "good" status
535 * rather than expensively fail things immediately.
536 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
537 */
538 for (i = 0; i < 10; i++) {
539 udelay(1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200540 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100541
542 if (OK_STAT(stat, good, bad)) {
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200543 *rstat = stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 return 0;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200545 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 }
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200547 *rstat = stat;
548 return -EFAULT;
549}
550
551/*
552 * In case of error returns error value after doing "*startstop = ide_error()".
553 * The caller should return the updated value of "startstop" in this case,
554 * "startstop" is unchanged when the function returns 0.
555 */
556int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
557{
558 int err;
559 u8 stat;
560
561 /* bail early if we've exceeded max_failures */
562 if (drive->max_failures && (drive->failures > drive->max_failures)) {
563 *startstop = ide_stopped;
564 return 1;
565 }
566
567 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
568
569 if (err) {
570 char *s = (err == -EBUSY) ? "status timeout" : "status error";
571 *startstop = ide_error(drive, s, stat);
572 }
573
574 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575}
576
577EXPORT_SYMBOL(ide_wait_stat);
578
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200579/**
580 * ide_in_drive_list - look for drive in black/white list
581 * @id: drive identifier
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200582 * @table: list to inspect
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200583 *
584 * Look for a drive in the blacklist and the whitelist tables
585 * Returns 1 if the drive is found in the table.
586 */
587
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200588int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200589{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200590 for ( ; table->id_model; table++)
591 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
592 (!table->id_firmware ||
593 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200594 return 1;
595 return 0;
596}
597
Bartlomiej Zolnierkiewiczb0244a02007-08-20 22:42:57 +0200598EXPORT_SYMBOL_GPL(ide_in_drive_list);
599
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200600/*
601 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
602 * We list them here and depend on the device side cable detection for them.
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200603 *
604 * Some optical devices with the buggy firmwares have the same problem.
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200605 */
606static const struct drive_list_entry ivb_list[] = {
607 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
Bartlomiej Zolnierkiewicz8588a2b72007-10-26 20:31:16 +0200608 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
Peter Missele97564f2007-11-27 21:35:57 +0100609 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
610 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
611 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
Alexander Smal3ced5c42008-04-28 23:44:43 +0200612 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
613 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
Bartlomiej Zolnierkiewiczc7b997b2008-12-02 20:40:03 +0100614 { "SAMSUNG SP0822N" , "WA100-10" },
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200615 { NULL , NULL }
616};
617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618/*
619 * All hosts that use the 80c ribbon must use!
620 * The name is derived from upper byte of word 93 and the 80c ribbon.
621 */
622u8 eighty_ninty_three (ide_drive_t *drive)
623{
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200624 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200625 u16 *id = drive->id;
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200626 int ivb = ide_in_drive_list(id, ivb_list);
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200627
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200628 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
629 return 1;
630
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200631 if (ivb)
632 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
633 drive->name);
634
Bartlomiej Zolnierkiewicz367d7e72008-10-10 22:39:30 +0200635 if (ata_id_is_sata(id) && !ivb)
George Kibardinb98f8802008-01-10 23:03:42 +0100636 return 1;
637
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200638 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200639 goto no_80w;
Alan Cox1a1276e2006-06-28 04:26:58 -0700640
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200641 /*
642 * FIXME:
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100643 * - change master/slave IDENTIFY order
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200644 * - force bit13 (80c cable present) check also for !ivb devices
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200645 * (unless the slave device is pre-ATA3)
646 */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200647 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
648 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200649 return 1;
650
651no_80w:
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200652 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200653 return 0;
654
655 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
656 "limiting max speed to UDMA33\n",
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200657 drive->name,
658 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200659
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200660 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200661
662 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663}
664
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200665int ide_driveid_update(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666{
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200667 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200668 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200669 u16 *id;
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200670 unsigned long flags;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100671 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 /*
674 * Re-read drive->id for possible DMA mode
675 * change (copied from ide-probe.c)
676 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678 SELECT_MASK(drive, 1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200679 tp_ops->set_irq(hwif, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 msleep(50);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200681 tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100682
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200683 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
684 SELECT_MASK(drive, 0);
685 return 0;
686 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100687
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200688 msleep(50); /* wait for IRQ and ATA_DRQ */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200689 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100690
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200691 if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692 SELECT_MASK(drive, 0);
693 printk("%s: CHECK for good STATUS\n", drive->name);
694 return 0;
695 }
696 local_irq_save(flags);
697 SELECT_MASK(drive, 0);
Bartlomiej Zolnierkiewicz151a6702008-10-10 22:39:28 +0200698 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699 if (!id) {
700 local_irq_restore(flags);
701 return 0;
702 }
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200703 tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
704 (void)tp_ops->read_status(hwif); /* clear drive IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 local_irq_enable();
706 local_irq_restore(flags);
707 ide_fix_driveid(id);
Bartlomiej Zolnierkiewicz3ab7efe2007-12-12 23:31:58 +0100708
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200709 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
710 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
711 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
712 /* anything more ? */
713
714 kfree(id);
715
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200716 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200717 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
719 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720}
721
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200722int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723{
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200724 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200725 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200726 u16 *id = drive->id, i;
Sergei Shtylyov89613e662007-11-27 21:35:52 +0100727 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 u8 stat;
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200729 ide_task_t task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200732 if (hwif->dma_ops) /* check if host supports DMA */
733 hwif->dma_ops->dma_host_set(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734#endif
735
Sergei Shtylyov89613e662007-11-27 21:35:52 +0100736 /* Skip setting PIO flow-control modes on pre-EIDE drives */
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200737 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
Sergei Shtylyov89613e662007-11-27 21:35:52 +0100738 goto skip;
739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 /*
741 * Don't use ide_wait_cmd here - it will
742 * attempt to set_geometry and recalibrate,
743 * but for some reason these don't work at
744 * this point (lost interrupt).
745 */
746 /*
747 * Select the drive, and issue the SETFEATURES command
748 */
749 disable_irq_nosync(hwif->irq);
750
751 /*
752 * FIXME: we race against the running IRQ here if
753 * this is called from non IRQ context. If we use
754 * disable_irq() we hang on the error path. Work
755 * is needed.
756 */
757
758 udelay(1);
759 SELECT_DRIVE(drive);
Sergei Shtylyove5403bf2008-10-17 18:09:15 +0200760 SELECT_MASK(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 udelay(1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200762 tp_ops->set_irq(hwif, 0);
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200763
764 memset(&task, 0, sizeof(task));
765 task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
766 task.tf.feature = SETFEATURES_XFER;
767 task.tf.nsect = speed;
768
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200769 tp_ops->tf_load(drive, &task);
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200770
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200771 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200772
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100773 if (drive->quirk_list == 2)
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200774 tp_ops->set_irq(hwif, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200776 error = __ide_wait_stat(drive, drive->ready_stat,
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200777 ATA_BUSY | ATA_DRQ | ATA_ERR,
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200778 WAIT_CMD, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
780 SELECT_MASK(drive, 0);
781
782 enable_irq(hwif->irq);
783
784 if (error) {
785 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
786 return error;
787 }
788
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200789 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
790 id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
791 id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792
Sergei Shtylyov89613e662007-11-27 21:35:52 +0100793 skip:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200795 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200796 hwif->dma_ops->dma_host_set(drive, 1);
797 else if (hwif->dma_ops) /* check if host supports DMA */
Bartlomiej Zolnierkiewicz4a546e02008-01-26 20:13:01 +0100798 ide_dma_off_quietly(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799#endif
800
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200801 if (speed >= XFER_UDMA_0) {
802 i = 1 << (speed - XFER_UDMA_0);
803 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
804 } else if (speed >= XFER_MW_DMA_0) {
805 i = 1 << (speed - XFER_MW_DMA_0);
806 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
807 } else if (speed >= XFER_SW_DMA_0) {
808 i = 1 << (speed - XFER_SW_DMA_0);
809 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 }
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 if (!drive->init_speed)
813 drive->init_speed = speed;
814 drive->current_speed = speed;
815 return error;
816}
817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818/*
819 * This should get invoked any time we exit the driver to
820 * wait for an interrupt response from a drive. handler() points
821 * at the appropriate code to handle the next interrupt, and a
822 * timer is started to prevent us from waiting forever in case
823 * something goes wrong (see the ide_timer_expiry() handler later on).
824 *
825 * See also ide_execute_command
826 */
827static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
828 unsigned int timeout, ide_expiry_t *expiry)
829{
830 ide_hwgroup_t *hwgroup = HWGROUP(drive);
831
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100832 BUG_ON(hwgroup->handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 hwgroup->handler = handler;
834 hwgroup->expiry = expiry;
835 hwgroup->timer.expires = jiffies + timeout;
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100836 hwgroup->req_gen_timer = hwgroup->req_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 add_timer(&hwgroup->timer);
838}
839
840void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
841 unsigned int timeout, ide_expiry_t *expiry)
842{
843 unsigned long flags;
844 spin_lock_irqsave(&ide_lock, flags);
845 __ide_set_handler(drive, handler, timeout, expiry);
846 spin_unlock_irqrestore(&ide_lock, flags);
847}
848
849EXPORT_SYMBOL(ide_set_handler);
850
851/**
852 * ide_execute_command - execute an IDE command
853 * @drive: IDE drive to issue the command against
854 * @command: command byte to write
855 * @handler: handler for next phase
856 * @timeout: timeout for command
857 * @expiry: handler to run on timeout
858 *
859 * Helper function to issue an IDE command. This handles the
860 * atomicity requirements, command timing and ensures that the
861 * handler and IRQ setup do not race. All IDE command kick off
862 * should go via this function or do equivalent locking.
863 */
Bartlomiej Zolnierkiewiczcd2a2d92008-01-25 22:17:06 +0100864
865void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
866 unsigned timeout, ide_expiry_t *expiry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867{
868 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100872 __ide_set_handler(drive, handler, timeout, expiry);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200873 hwif->tp_ops->exec_command(hwif, cmd);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100874 /*
875 * Drive takes 400nS to respond, we must avoid the IRQ being
876 * serviced before that.
877 *
878 * FIXME: we could skip this delay with care on non shared devices
879 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 ndelay(400);
881 spin_unlock_irqrestore(&ide_lock, flags);
882}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883EXPORT_SYMBOL(ide_execute_command);
884
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200885void ide_execute_pkt_cmd(ide_drive_t *drive)
886{
887 ide_hwif_t *hwif = drive->hwif;
888 unsigned long flags;
889
890 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200891 hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET);
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200892 ndelay(400);
893 spin_unlock_irqrestore(&ide_lock, flags);
894}
895EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200897static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200898{
899 struct request *rq = drive->hwif->hwgroup->rq;
900
901 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200902 ide_end_request(drive, err ? err : 1, 0);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200903}
904
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905/* needed below */
906static ide_startstop_t do_reset1 (ide_drive_t *, int);
907
908/*
909 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
910 * during an atapi drive reset operation. If the drive has not yet responded,
911 * and we have not yet hit our maximum waiting time, then the timer is restarted
912 * for another 50ms.
913 */
914static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
915{
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200916 ide_hwif_t *hwif = drive->hwif;
917 ide_hwgroup_t *hwgroup = hwif->hwgroup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 u8 stat;
919
920 SELECT_DRIVE(drive);
921 udelay (10);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200922 stat = hwif->tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200924 if (OK_STAT(stat, 0, ATA_BUSY))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 printk("%s: ATAPI reset complete\n", drive->name);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100926 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
929 /* continue polling */
930 return ide_started;
931 }
932 /* end of polling */
933 hwgroup->polling = 0;
934 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
935 drive->name, stat);
936 /* do it the old fashioned way */
937 return do_reset1(drive, 1);
938 }
939 /* done polling */
940 hwgroup->polling = 0;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200941 ide_complete_drive_reset(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 return ide_stopped;
943}
944
Bartlomiej Zolnierkiewicz0e3d84a2008-10-13 21:39:41 +0200945static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
946{
947 static const char *err_master_vals[] =
948 { NULL, "passed", "formatter device error",
949 "sector buffer error", "ECC circuitry error",
950 "controlling MPU error" };
951
952 u8 err_master = err & 0x7f;
953
954 printk(KERN_ERR "%s: reset: master: ", hwif->name);
955 if (err_master && err_master < 6)
956 printk(KERN_CONT "%s", err_master_vals[err_master]);
957 else
958 printk(KERN_CONT "error (0x%02x?)", err);
959 if (err & 0x80)
960 printk(KERN_CONT "; slave: failed");
961 printk(KERN_CONT "\n");
962}
963
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964/*
965 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
966 * during an ide reset operation. If the drives have not yet responded,
967 * and we have not yet hit our maximum waiting time, then the timer is restarted
968 * for another 50ms.
969 */
970static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
971{
972 ide_hwgroup_t *hwgroup = HWGROUP(drive);
973 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200974 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 u8 tmp;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200976 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200978 if (port_ops && port_ops->reset_poll) {
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200979 err = port_ops->reset_poll(drive);
980 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
982 hwif->name, drive->name);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200983 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 }
985 }
986
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200987 tmp = hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100988
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200989 if (!OK_STAT(tmp, 0, ATA_BUSY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
992 /* continue polling */
993 return ide_started;
994 }
995 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
996 drive->failures++;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200997 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 } else {
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +0100999 tmp = ide_read_error(drive);
1000
1001 if (tmp == 1) {
Bartlomiej Zolnierkiewicz0e3d84a2008-10-13 21:39:41 +02001002 printk(KERN_INFO "%s: reset: success\n", hwif->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 drive->failures = 0;
1004 } else {
Bartlomiej Zolnierkiewicz0e3d84a2008-10-13 21:39:41 +02001005 ide_reset_report_error(hwif, tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 drive->failures++;
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001007 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 }
1009 }
Elias Oltmanns79e36a92008-07-16 20:33:48 +02001010out:
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001011 hwgroup->polling = 0; /* done polling */
1012 ide_complete_drive_reset(drive, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 return ide_stopped;
1014}
1015
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016static void ide_disk_pre_reset(ide_drive_t *drive)
1017{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +02001018 int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
1020 drive->special.all = 0;
1021 drive->special.b.set_geometry = legacy;
1022 drive->special.b.recalibrate = legacy;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001023
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +01001024 drive->mult_count = 0;
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001025 drive->dev_flags &= ~IDE_DFLAG_PARKED;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001026
1027 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
1028 (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 drive->mult_req = 0;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001030
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031 if (drive->mult_req != drive->mult_count)
1032 drive->special.b.set_multmode = 1;
1033}
1034
1035static void pre_reset(ide_drive_t *drive)
1036{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001037 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1038
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 if (drive->media == ide_disk)
1040 ide_disk_pre_reset(drive);
1041 else
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001042 drive->dev_flags |= IDE_DFLAG_POST_RESET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001044 if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001045 if (drive->crc_count)
Bartlomiej Zolnierkiewicz578cfa02008-02-02 19:56:47 +01001046 ide_check_dma_crc(drive);
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001047 else
1048 ide_dma_off(drive);
1049 }
1050
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001051 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
1052 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
1053 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 drive->io_32bit = 0;
1055 }
1056 return;
1057 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001059 if (port_ops && port_ops->pre_reset)
1060 port_ops->pre_reset(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
Suleiman Souhlal513daad2007-03-26 23:03:20 +02001062 if (drive->current_speed != 0xff)
1063 drive->desired_speed = drive->current_speed;
1064 drive->current_speed = 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065}
1066
1067/*
1068 * do_reset1() attempts to recover a confused drive by resetting it.
1069 * Unfortunately, resetting a disk drive actually resets all devices on
1070 * the same interface, so it can really be thought of as resetting the
1071 * interface rather than resetting the drive.
1072 *
1073 * ATAPI devices have their own reset mechanism which allows them to be
1074 * individually reset without clobbering other devices on the same interface.
1075 *
1076 * Unfortunately, the IDE interface does not generate an interrupt to let
1077 * us know when the reset operation has finished, so we must poll for this.
1078 * Equally poor, though, is the fact that this may a very long time to complete,
1079 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1080 * we set a timer to poll at 50ms intervals.
1081 */
1082static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1083{
1084 unsigned int unit;
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001085 unsigned long flags, timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 ide_hwif_t *hwif;
1087 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001088 struct ide_io_ports *io_ports;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001089 const struct ide_tp_ops *tp_ops;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001090 const struct ide_port_ops *port_ops;
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001091 DEFINE_WAIT(wait);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001092
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 spin_lock_irqsave(&ide_lock, flags);
1094 hwif = HWIF(drive);
1095 hwgroup = HWGROUP(drive);
1096
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001097 io_ports = &hwif->io_ports;
1098
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001099 tp_ops = hwif->tp_ops;
1100
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 /* We must not reset with running handlers */
Eric Sesterhenn125e1872006-06-23 02:06:06 -07001102 BUG_ON(hwgroup->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
1104 /* For an ATAPI device, first try an ATAPI SRST. */
1105 if (drive->media != ide_disk && !do_not_try_atapi) {
1106 pre_reset(drive);
1107 SELECT_DRIVE(drive);
1108 udelay (20);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +02001109 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
Alan Cox68ad9912005-06-27 15:24:25 -07001110 ndelay(400);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1112 hwgroup->polling = 1;
1113 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1114 spin_unlock_irqrestore(&ide_lock, flags);
1115 return ide_started;
1116 }
1117
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001118 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
1119 do {
1120 unsigned long now;
1121
1122 prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
1123 timeout = jiffies;
1124 for (unit = 0; unit < MAX_DRIVES; unit++) {
1125 ide_drive_t *tdrive = &hwif->drives[unit];
1126
1127 if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
1128 tdrive->dev_flags & IDE_DFLAG_PARKED &&
1129 time_after(tdrive->sleep, timeout))
1130 timeout = tdrive->sleep;
1131 }
1132
1133 now = jiffies;
1134 if (time_before_eq(timeout, now))
1135 break;
1136
1137 spin_unlock_irqrestore(&ide_lock, flags);
1138 timeout = schedule_timeout_uninterruptible(timeout - now);
1139 spin_lock_irqsave(&ide_lock, flags);
1140 } while (timeout);
1141 finish_wait(&ide_park_wq, &wait);
1142
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 /*
1144 * First, reset any device state data we were maintaining
1145 * for any of the drives on this interface.
1146 */
1147 for (unit = 0; unit < MAX_DRIVES; ++unit)
1148 pre_reset(&hwif->drives[unit]);
1149
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001150 if (io_ports->ctl_addr == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 spin_unlock_irqrestore(&ide_lock, flags);
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001152 ide_complete_drive_reset(drive, -ENXIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 return ide_stopped;
1154 }
1155
1156 /*
1157 * Note that we also set nIEN while resetting the device,
1158 * to mask unwanted interrupts from the interface during the reset.
1159 * However, due to the design of PC hardware, this will cause an
1160 * immediate interrupt due to the edge transition it produces.
1161 * This single interrupt gives us a "fast poll" for drives that
1162 * recover from reset very quickly, saving us the first 50ms wait time.
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +02001163 *
1164 * TODO: add ->softreset method and stop abusing ->set_irq
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 */
1166 /* set SRST and nIEN */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001167 tp_ops->set_irq(hwif, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 /* more than enough time */
1169 udelay(10);
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +02001170 /* clear SRST, leave nIEN (unless device is on the quirk list) */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001171 tp_ops->set_irq(hwif, drive->quirk_list == 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 /* more than enough time */
1173 udelay(10);
1174 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1175 hwgroup->polling = 1;
1176 __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
1177
1178 /*
1179 * Some weird controller like resetting themselves to a strange
1180 * state when the disks are reset this way. At least, the Winbond
1181 * 553 documentation says that
1182 */
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001183 port_ops = hwif->port_ops;
1184 if (port_ops && port_ops->resetproc)
1185 port_ops->resetproc(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186
1187 spin_unlock_irqrestore(&ide_lock, flags);
1188 return ide_started;
1189}
1190
1191/*
1192 * ide_do_reset() is the entry point to the drive/interface reset code.
1193 */
1194
1195ide_startstop_t ide_do_reset (ide_drive_t *drive)
1196{
1197 return do_reset1(drive, 0);
1198}
1199
1200EXPORT_SYMBOL(ide_do_reset);
1201
1202/*
1203 * ide_wait_not_busy() waits for the currently selected device on the hwif
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +01001204 * to report a non-busy status, see comments in ide_probe_port().
Linus Torvalds1da177e2005-04-16 15:20:36 -07001205 */
1206int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
1207{
1208 u8 stat = 0;
1209
1210 while(timeout--) {
1211 /*
1212 * Turn this into a schedule() sleep once I'm sure
1213 * about locking issues (2.5 work ?).
1214 */
1215 mdelay(1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001216 stat = hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +02001217 if ((stat & ATA_BUSY) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 return 0;
1219 /*
1220 * Assume a value of 0xff means nothing is connected to
1221 * the interface and it doesn't implement the pull-down
1222 * resistor on D7.
1223 */
1224 if (stat == 0xff)
1225 return -ENODEV;
Ingo Molnar6842f8c2006-02-03 03:04:55 -08001226 touch_softlockup_watchdog();
Michal Schmidt1e862402006-07-30 03:03:29 -07001227 touch_nmi_watchdog();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228 }
1229 return -EBUSY;
1230}
1231
1232EXPORT_SYMBOL_GPL(ide_wait_not_busy);
1233