blob: c41c3b9b6f022b89148792c05d9564021ff271da [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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 /*
461 * We do a passive status test under shared PCI interrupts on
462 * cards that truly share the ATA side interrupt, but may also share
463 * an interrupt with another pci card/device. We make no assumptions
464 * about possible isa-pnp and pci-pnp issues yet.
465 */
Bartlomiej Zolnierkiewicz66364872008-12-02 20:40:03 +0100466 if (hwif->io_ports.ctl_addr &&
467 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0)
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200468 stat = hwif->tp_ops->read_altstatus(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 /* Note: this may clear a pending IRQ!! */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200471 stat = hwif->tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200473 if (stat & ATA_BUSY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 /* drive busy: definitely not interrupting */
475 return 0;
476
477 /* drive ready: *might* be interrupting */
478 return 1;
479}
480
481EXPORT_SYMBOL(drive_is_ready);
482
483/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 * This routine busy-waits for the drive status to be not "busy".
485 * It then checks the status for all of the "good" bits and none
486 * of the "bad" bits, and if all is okay it returns 0. All other
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200487 * cases return error -- caller may then invoke ide_error().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 *
489 * This routine should get fixed to not hog the cpu during extra long waits..
490 * That could be done by busy-waiting for the first jiffy or two, and then
491 * setting a timer to wake up at half second intervals thereafter,
492 * until timeout is achieved, before timing out.
493 */
Bartlomiej Zolnierkiewiczaedea592007-10-13 17:47:50 +0200494static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495{
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200496 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200497 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 unsigned long flags;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200499 int i;
500 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
502 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200503 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100504
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200505 if (stat & ATA_BUSY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 local_irq_set(flags);
507 timeout += jiffies;
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200508 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if (time_after(jiffies, timeout)) {
510 /*
511 * One last read after the timeout in case
512 * heavy interrupt load made us not make any
513 * progress during the timeout..
514 */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200515 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200516 if ((stat & ATA_BUSY) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 break;
518
519 local_irq_restore(flags);
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200520 *rstat = stat;
521 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 }
523 }
524 local_irq_restore(flags);
525 }
526 /*
527 * Allow status to settle, then read it again.
528 * A few rare drives vastly violate the 400ns spec here,
529 * so we'll wait up to 10usec for a "good" status
530 * rather than expensively fail things immediately.
531 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
532 */
533 for (i = 0; i < 10; i++) {
534 udelay(1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200535 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100536
537 if (OK_STAT(stat, good, bad)) {
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200538 *rstat = stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 return 0;
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200540 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 }
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200542 *rstat = stat;
543 return -EFAULT;
544}
545
546/*
547 * In case of error returns error value after doing "*startstop = ide_error()".
548 * The caller should return the updated value of "startstop" in this case,
549 * "startstop" is unchanged when the function returns 0.
550 */
551int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout)
552{
553 int err;
554 u8 stat;
555
556 /* bail early if we've exceeded max_failures */
557 if (drive->max_failures && (drive->failures > drive->max_failures)) {
558 *startstop = ide_stopped;
559 return 1;
560 }
561
562 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
563
564 if (err) {
565 char *s = (err == -EBUSY) ? "status timeout" : "status error";
566 *startstop = ide_error(drive, s, stat);
567 }
568
569 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570}
571
572EXPORT_SYMBOL(ide_wait_stat);
573
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200574/**
575 * ide_in_drive_list - look for drive in black/white list
576 * @id: drive identifier
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200577 * @table: list to inspect
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200578 *
579 * Look for a drive in the blacklist and the whitelist tables
580 * Returns 1 if the drive is found in the table.
581 */
582
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200583int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200584{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200585 for ( ; table->id_model; table++)
586 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
587 (!table->id_firmware ||
588 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200589 return 1;
590 return 0;
591}
592
Bartlomiej Zolnierkiewiczb0244a02007-08-20 22:42:57 +0200593EXPORT_SYMBOL_GPL(ide_in_drive_list);
594
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200595/*
596 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
597 * We list them here and depend on the device side cable detection for them.
Bartlomiej Zolnierkiewicz8588a2b2007-10-26 20:31:16 +0200598 *
599 * Some optical devices with the buggy firmwares have the same problem.
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200600 */
601static const struct drive_list_entry ivb_list[] = {
602 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
Bartlomiej Zolnierkiewicz8588a2b2007-10-26 20:31:16 +0200603 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
Peter Missele97564f2007-11-27 21:35:57 +0100604 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
605 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
606 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
Alexander Smal3ced5c42008-04-28 23:44:43 +0200607 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
608 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
Bartlomiej Zolnierkiewiczc7b997b2008-12-02 20:40:03 +0100609 { "SAMSUNG SP0822N" , "WA100-10" },
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200610 { NULL , NULL }
611};
612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613/*
614 * All hosts that use the 80c ribbon must use!
615 * The name is derived from upper byte of word 93 and the 80c ribbon.
616 */
617u8 eighty_ninty_three (ide_drive_t *drive)
618{
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200619 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200620 u16 *id = drive->id;
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200621 int ivb = ide_in_drive_list(id, ivb_list);
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200622
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200623 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
624 return 1;
625
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200626 if (ivb)
627 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
628 drive->name);
629
Bartlomiej Zolnierkiewicz367d7e72008-10-10 22:39:30 +0200630 if (ata_id_is_sata(id) && !ivb)
George Kibardinb98f8802008-01-10 23:03:42 +0100631 return 1;
632
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200633 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200634 goto no_80w;
Alan Cox1a1276e2006-06-28 04:26:58 -0700635
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200636 /*
637 * FIXME:
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100638 * - change master/slave IDENTIFY order
Bartlomiej Zolnierkiewicza5b7e702007-08-20 22:42:56 +0200639 * - force bit13 (80c cable present) check also for !ivb devices
Bartlomiej Zolnierkiewiczf68d9322007-03-26 23:03:18 +0200640 * (unless the slave device is pre-ATA3)
641 */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200642 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
643 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200644 return 1;
645
646no_80w:
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200647 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200648 return 0;
649
650 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
651 "limiting max speed to UDMA33\n",
Bartlomiej Zolnierkiewicz49521f92007-07-09 23:17:58 +0200652 drive->name,
653 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200654
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200655 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
Bartlomiej Zolnierkiewicz7f8f48a2007-05-10 00:01:10 +0200656
657 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658}
659
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200660int ide_driveid_update(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661{
Bartlomiej Zolnierkiewicz8a455132007-10-20 00:32:36 +0200662 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200663 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200664 u16 *id;
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200665 unsigned long flags;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100666 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 /*
669 * Re-read drive->id for possible DMA mode
670 * change (copied from ide-probe.c)
671 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672
673 SELECT_MASK(drive, 1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200674 tp_ops->set_irq(hwif, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 msleep(50);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200676 tp_ops->exec_command(hwif, ATA_CMD_ID_ATA);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100677
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200678 if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) {
679 SELECT_MASK(drive, 0);
680 return 0;
681 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100682
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200683 msleep(50); /* wait for IRQ and ATA_DRQ */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200684 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100685
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200686 if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 SELECT_MASK(drive, 0);
688 printk("%s: CHECK for good STATUS\n", drive->name);
689 return 0;
690 }
691 local_irq_save(flags);
692 SELECT_MASK(drive, 0);
Bartlomiej Zolnierkiewicz151a6702008-10-10 22:39:28 +0200693 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 if (!id) {
695 local_irq_restore(flags);
696 return 0;
697 }
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200698 tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
699 (void)tp_ops->read_status(hwif); /* clear drive IRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 local_irq_enable();
701 local_irq_restore(flags);
702 ide_fix_driveid(id);
Bartlomiej Zolnierkiewicz3ab7efe2007-12-12 23:31:58 +0100703
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200704 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
705 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
706 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
707 /* anything more ? */
708
709 kfree(id);
710
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200711 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200712 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
714 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715}
716
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200717int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718{
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200719 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200720 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200721 u16 *id = drive->id, i;
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100722 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 u8 stat;
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200724 ide_task_t task;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200727 if (hwif->dma_ops) /* check if host supports DMA */
728 hwif->dma_ops->dma_host_set(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729#endif
730
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100731 /* Skip setting PIO flow-control modes on pre-EIDE drives */
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200732 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100733 goto skip;
734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 /*
736 * Don't use ide_wait_cmd here - it will
737 * attempt to set_geometry and recalibrate,
738 * but for some reason these don't work at
739 * this point (lost interrupt).
740 */
741 /*
742 * Select the drive, and issue the SETFEATURES command
743 */
744 disable_irq_nosync(hwif->irq);
745
746 /*
747 * FIXME: we race against the running IRQ here if
748 * this is called from non IRQ context. If we use
749 * disable_irq() we hang on the error path. Work
750 * is needed.
751 */
752
753 udelay(1);
754 SELECT_DRIVE(drive);
Sergei Shtylyove5403bf2008-10-17 18:09:15 +0200755 SELECT_MASK(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 udelay(1);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200757 tp_ops->set_irq(hwif, 0);
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200758
759 memset(&task, 0, sizeof(task));
760 task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
761 task.tf.feature = SETFEATURES_XFER;
762 task.tf.nsect = speed;
763
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200764 tp_ops->tf_load(drive, &task);
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200765
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200766 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
Bartlomiej Zolnierkiewicz59be2c82008-07-23 19:55:52 +0200767
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100768 if (drive->quirk_list == 2)
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200769 tp_ops->set_irq(hwif, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200771 error = __ide_wait_stat(drive, drive->ready_stat,
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200772 ATA_BUSY | ATA_DRQ | ATA_ERR,
Bartlomiej Zolnierkiewicz74af21c2007-10-13 17:47:49 +0200773 WAIT_CMD, &stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
775 SELECT_MASK(drive, 0);
776
777 enable_irq(hwif->irq);
778
779 if (error) {
780 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
781 return error;
782 }
783
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200784 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
785 id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
786 id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787
Sergei Shtylyov89613e62007-11-27 21:35:52 +0100788 skip:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789#ifdef CONFIG_BLK_DEV_IDEDMA
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200790 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200791 hwif->dma_ops->dma_host_set(drive, 1);
792 else if (hwif->dma_ops) /* check if host supports DMA */
Bartlomiej Zolnierkiewicz4a546e02008-01-26 20:13:01 +0100793 ide_dma_off_quietly(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794#endif
795
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200796 if (speed >= XFER_UDMA_0) {
797 i = 1 << (speed - XFER_UDMA_0);
798 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
799 } else if (speed >= XFER_MW_DMA_0) {
800 i = 1 << (speed - XFER_MW_DMA_0);
801 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
802 } else if (speed >= XFER_SW_DMA_0) {
803 i = 1 << (speed - XFER_SW_DMA_0);
804 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805 }
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 if (!drive->init_speed)
808 drive->init_speed = speed;
809 drive->current_speed = speed;
810 return error;
811}
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813/*
814 * This should get invoked any time we exit the driver to
815 * wait for an interrupt response from a drive. handler() points
816 * at the appropriate code to handle the next interrupt, and a
817 * timer is started to prevent us from waiting forever in case
818 * something goes wrong (see the ide_timer_expiry() handler later on).
819 *
820 * See also ide_execute_command
821 */
822static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
823 unsigned int timeout, ide_expiry_t *expiry)
824{
825 ide_hwgroup_t *hwgroup = HWGROUP(drive);
826
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100827 BUG_ON(hwgroup->handler);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 hwgroup->handler = handler;
829 hwgroup->expiry = expiry;
830 hwgroup->timer.expires = jiffies + timeout;
Sergei Shtylyovd30a4262008-02-11 00:32:12 +0100831 hwgroup->req_gen_timer = hwgroup->req_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 add_timer(&hwgroup->timer);
833}
834
835void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler,
836 unsigned int timeout, ide_expiry_t *expiry)
837{
838 unsigned long flags;
839 spin_lock_irqsave(&ide_lock, flags);
840 __ide_set_handler(drive, handler, timeout, expiry);
841 spin_unlock_irqrestore(&ide_lock, flags);
842}
843
844EXPORT_SYMBOL(ide_set_handler);
845
846/**
847 * ide_execute_command - execute an IDE command
848 * @drive: IDE drive to issue the command against
849 * @command: command byte to write
850 * @handler: handler for next phase
851 * @timeout: timeout for command
852 * @expiry: handler to run on timeout
853 *
854 * Helper function to issue an IDE command. This handles the
855 * atomicity requirements, command timing and ensures that the
856 * handler and IRQ setup do not race. All IDE command kick off
857 * should go via this function or do equivalent locking.
858 */
Bartlomiej Zolnierkiewiczcd2a2d92008-01-25 22:17:06 +0100859
860void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
861 unsigned timeout, ide_expiry_t *expiry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862{
863 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100865
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100867 __ide_set_handler(drive, handler, timeout, expiry);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200868 hwif->tp_ops->exec_command(hwif, cmd);
Bartlomiej Zolnierkiewicz629f9442008-02-02 19:56:46 +0100869 /*
870 * Drive takes 400nS to respond, we must avoid the IRQ being
871 * serviced before that.
872 *
873 * FIXME: we could skip this delay with care on non shared devices
874 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 ndelay(400);
876 spin_unlock_irqrestore(&ide_lock, flags);
877}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878EXPORT_SYMBOL(ide_execute_command);
879
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200880void ide_execute_pkt_cmd(ide_drive_t *drive)
881{
882 ide_hwif_t *hwif = drive->hwif;
883 unsigned long flags;
884
885 spin_lock_irqsave(&ide_lock, flags);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200886 hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET);
Bartlomiej Zolnierkiewicz1fc14252008-04-28 23:44:39 +0200887 ndelay(400);
888 spin_unlock_irqrestore(&ide_lock, flags);
889}
890EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200892static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200893{
894 struct request *rq = drive->hwif->hwgroup->rq;
895
896 if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET)
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200897 ide_end_request(drive, err ? err : 1, 0);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200898}
899
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900/* needed below */
901static ide_startstop_t do_reset1 (ide_drive_t *, int);
902
903/*
904 * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms
905 * during an atapi drive reset operation. If the drive has not yet responded,
906 * and we have not yet hit our maximum waiting time, then the timer is restarted
907 * for another 50ms.
908 */
909static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive)
910{
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200911 ide_hwif_t *hwif = drive->hwif;
912 ide_hwgroup_t *hwgroup = hwif->hwgroup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 u8 stat;
914
915 SELECT_DRIVE(drive);
916 udelay (10);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200917 stat = hwif->tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200919 if (OK_STAT(stat, 0, ATA_BUSY))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 printk("%s: ATAPI reset complete\n", drive->name);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100921 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
924 /* continue polling */
925 return ide_started;
926 }
927 /* end of polling */
928 hwgroup->polling = 0;
929 printk("%s: ATAPI reset timed-out, status=0x%02x\n",
930 drive->name, stat);
931 /* do it the old fashioned way */
932 return do_reset1(drive, 1);
933 }
934 /* done polling */
935 hwgroup->polling = 0;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200936 ide_complete_drive_reset(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 return ide_stopped;
938}
939
Bartlomiej Zolnierkiewicz0e3d84a2008-10-13 21:39:41 +0200940static void ide_reset_report_error(ide_hwif_t *hwif, u8 err)
941{
942 static const char *err_master_vals[] =
943 { NULL, "passed", "formatter device error",
944 "sector buffer error", "ECC circuitry error",
945 "controlling MPU error" };
946
947 u8 err_master = err & 0x7f;
948
949 printk(KERN_ERR "%s: reset: master: ", hwif->name);
950 if (err_master && err_master < 6)
951 printk(KERN_CONT "%s", err_master_vals[err_master]);
952 else
953 printk(KERN_CONT "error (0x%02x?)", err);
954 if (err & 0x80)
955 printk(KERN_CONT "; slave: failed");
956 printk(KERN_CONT "\n");
957}
958
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959/*
960 * reset_pollfunc() gets invoked to poll the interface for completion every 50ms
961 * during an ide reset operation. If the drives have not yet responded,
962 * and we have not yet hit our maximum waiting time, then the timer is restarted
963 * for another 50ms.
964 */
965static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
966{
967 ide_hwgroup_t *hwgroup = HWGROUP(drive);
968 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200969 const struct ide_port_ops *port_ops = hwif->port_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 u8 tmp;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200971 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200973 if (port_ops && port_ops->reset_poll) {
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200974 err = port_ops->reset_poll(drive);
975 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 printk(KERN_ERR "%s: host reset_poll failure for %s.\n",
977 hwif->name, drive->name);
Elias Oltmanns79e36a92008-07-16 20:33:48 +0200978 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 }
980 }
981
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200982 tmp = hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100983
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200984 if (!OK_STAT(tmp, 0, ATA_BUSY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 if (time_before(jiffies, hwgroup->poll_timeout)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL);
987 /* continue polling */
988 return ide_started;
989 }
990 printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp);
991 drive->failures++;
Elias Oltmanns64a8f002008-07-16 20:33:48 +0200992 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 } else {
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +0100994 tmp = ide_read_error(drive);
995
996 if (tmp == 1) {
Bartlomiej Zolnierkiewicz0e3d84a2008-10-13 21:39:41 +0200997 printk(KERN_INFO "%s: reset: success\n", hwif->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 drive->failures = 0;
999 } else {
Bartlomiej Zolnierkiewicz0e3d84a2008-10-13 21:39:41 +02001000 ide_reset_report_error(hwif, tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 drive->failures++;
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001002 err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 }
1004 }
Elias Oltmanns79e36a92008-07-16 20:33:48 +02001005out:
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001006 hwgroup->polling = 0; /* done polling */
1007 ide_complete_drive_reset(drive, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 return ide_stopped;
1009}
1010
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011static void ide_disk_pre_reset(ide_drive_t *drive)
1012{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +02001013 int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014
1015 drive->special.all = 0;
1016 drive->special.b.set_geometry = legacy;
1017 drive->special.b.recalibrate = legacy;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001018
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +01001019 drive->mult_count = 0;
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001020 drive->dev_flags &= ~IDE_DFLAG_PARKED;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001021
1022 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 &&
1023 (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 drive->mult_req = 0;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 if (drive->mult_req != drive->mult_count)
1027 drive->special.b.set_multmode = 1;
1028}
1029
1030static void pre_reset(ide_drive_t *drive)
1031{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001032 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
1033
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 if (drive->media == ide_disk)
1035 ide_disk_pre_reset(drive);
1036 else
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001037 drive->dev_flags |= IDE_DFLAG_POST_RESET;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001039 if (drive->dev_flags & IDE_DFLAG_USING_DMA) {
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001040 if (drive->crc_count)
Bartlomiej Zolnierkiewicz578cfa02008-02-02 19:56:47 +01001041 ide_check_dma_crc(drive);
Bartlomiej Zolnierkiewicz99ffbe02008-02-02 19:56:47 +01001042 else
1043 ide_dma_off(drive);
1044 }
1045
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001046 if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) {
1047 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) {
1048 drive->dev_flags &= ~IDE_DFLAG_UNMASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 drive->io_32bit = 0;
1050 }
1051 return;
1052 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001054 if (port_ops && port_ops->pre_reset)
1055 port_ops->pre_reset(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056
Suleiman Souhlal513daad2007-03-26 23:03:20 +02001057 if (drive->current_speed != 0xff)
1058 drive->desired_speed = drive->current_speed;
1059 drive->current_speed = 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060}
1061
1062/*
1063 * do_reset1() attempts to recover a confused drive by resetting it.
1064 * Unfortunately, resetting a disk drive actually resets all devices on
1065 * the same interface, so it can really be thought of as resetting the
1066 * interface rather than resetting the drive.
1067 *
1068 * ATAPI devices have their own reset mechanism which allows them to be
1069 * individually reset without clobbering other devices on the same interface.
1070 *
1071 * Unfortunately, the IDE interface does not generate an interrupt to let
1072 * us know when the reset operation has finished, so we must poll for this.
1073 * Equally poor, though, is the fact that this may a very long time to complete,
1074 * (up to 30 seconds worstcase). So, instead of busy-waiting here for it,
1075 * we set a timer to poll at 50ms intervals.
1076 */
1077static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
1078{
1079 unsigned int unit;
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001080 unsigned long flags, timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 ide_hwif_t *hwif;
1082 ide_hwgroup_t *hwgroup;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001083 struct ide_io_ports *io_ports;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001084 const struct ide_tp_ops *tp_ops;
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001085 const struct ide_port_ops *port_ops;
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001086 DEFINE_WAIT(wait);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +02001087
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 spin_lock_irqsave(&ide_lock, flags);
1089 hwif = HWIF(drive);
1090 hwgroup = HWGROUP(drive);
1091
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001092 io_ports = &hwif->io_ports;
1093
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001094 tp_ops = hwif->tp_ops;
1095
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 /* We must not reset with running handlers */
Eric Sesterhenn125e1872006-06-23 02:06:06 -07001097 BUG_ON(hwgroup->handler != NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098
1099 /* For an ATAPI device, first try an ATAPI SRST. */
1100 if (drive->media != ide_disk && !do_not_try_atapi) {
1101 pre_reset(drive);
1102 SELECT_DRIVE(drive);
1103 udelay (20);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +02001104 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
Alan Cox68ad9912005-06-27 15:24:25 -07001105 ndelay(400);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
1107 hwgroup->polling = 1;
1108 __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL);
1109 spin_unlock_irqrestore(&ide_lock, flags);
1110 return ide_started;
1111 }
1112
Elias Oltmanns4abdc6e2008-10-13 21:39:50 +02001113 /* We must not disturb devices in the IDE_DFLAG_PARKED state. */
1114 do {
1115 unsigned long now;
1116
1117 prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
1118 timeout = jiffies;
1119 for (unit = 0; unit < MAX_DRIVES; unit++) {
1120 ide_drive_t *tdrive = &hwif->drives[unit];
1121
1122 if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
1123 tdrive->dev_flags & IDE_DFLAG_PARKED &&
1124 time_after(tdrive->sleep, timeout))
1125 timeout = tdrive->sleep;
1126 }
1127
1128 now = jiffies;
1129 if (time_before_eq(timeout, now))
1130 break;
1131
1132 spin_unlock_irqrestore(&ide_lock, flags);
1133 timeout = schedule_timeout_uninterruptible(timeout - now);
1134 spin_lock_irqsave(&ide_lock, flags);
1135 } while (timeout);
1136 finish_wait(&ide_park_wq, &wait);
1137
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 /*
1139 * First, reset any device state data we were maintaining
1140 * for any of the drives on this interface.
1141 */
1142 for (unit = 0; unit < MAX_DRIVES; ++unit)
1143 pre_reset(&hwif->drives[unit]);
1144
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001145 if (io_ports->ctl_addr == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 spin_unlock_irqrestore(&ide_lock, flags);
Elias Oltmanns64a8f002008-07-16 20:33:48 +02001147 ide_complete_drive_reset(drive, -ENXIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 return ide_stopped;
1149 }
1150
1151 /*
1152 * Note that we also set nIEN while resetting the device,
1153 * to mask unwanted interrupts from the interface during the reset.
1154 * However, due to the design of PC hardware, this will cause an
1155 * immediate interrupt due to the edge transition it produces.
1156 * This single interrupt gives us a "fast poll" for drives that
1157 * recover from reset very quickly, saving us the first 50ms wait time.
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +02001158 *
1159 * TODO: add ->softreset method and stop abusing ->set_irq
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160 */
1161 /* set SRST and nIEN */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001162 tp_ops->set_irq(hwif, 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001163 /* more than enough time */
1164 udelay(10);
Bartlomiej Zolnierkiewicz6e6afb32008-07-23 19:55:52 +02001165 /* clear SRST, leave nIEN (unless device is on the quirk list) */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001166 tp_ops->set_irq(hwif, drive->quirk_list == 2);
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 Zolnierkiewicz374e0422008-07-23 19:55:56 +02001211 stat = hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +02001212 if ((stat & ATA_BUSY) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001213 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