Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 | 2 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
ccd32e22 | 3 | * Copyright (C) 2003 Red Hat |
1da177e4 LT |
4 | * |
5 | */ | |
6 | ||
1da177e4 LT |
7 | #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> | |
1da177e4 LT |
21 | #include <linux/ide.h> |
22 | #include <linux/bitops.h> | |
1e86240f | 23 | #include <linux/nmi.h> |
1da177e4 LT |
24 | |
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 | ||
34 | static u8 ide_inb (unsigned long port) | |
35 | { | |
36 | return (u8) inb(port); | |
37 | } | |
38 | ||
1da177e4 LT |
39 | static void ide_outb (u8 val, unsigned long port) |
40 | { | |
41 | outb(val, port); | |
42 | } | |
43 | ||
1da177e4 LT |
44 | /* |
45 | * MMIO operations, typically used for SATA controllers | |
46 | */ | |
47 | ||
48 | static u8 ide_mm_inb (unsigned long port) | |
49 | { | |
50 | return (u8) readb((void __iomem *) port); | |
51 | } | |
52 | ||
1da177e4 LT |
53 | static void ide_mm_outb (u8 value, unsigned long port) |
54 | { | |
55 | writeb(value, (void __iomem *) port); | |
56 | } | |
57 | ||
1da177e4 LT |
58 | void SELECT_DRIVE (ide_drive_t *drive) |
59 | { | |
23579a2a | 60 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 61 | const struct ide_port_ops *port_ops = hwif->port_ops; |
40f095f0 | 62 | ide_task_t task; |
23579a2a | 63 | |
ac95beed BZ |
64 | if (port_ops && port_ops->selectproc) |
65 | port_ops->selectproc(drive); | |
23579a2a | 66 | |
40f095f0 BZ |
67 | memset(&task, 0, sizeof(task)); |
68 | task.tf_flags = IDE_TFLAG_OUT_DEVICE; | |
69 | ||
374e042c | 70 | drive->hwif->tp_ops->tf_load(drive, &task); |
1da177e4 LT |
71 | } |
72 | ||
ed4af48f | 73 | void SELECT_MASK(ide_drive_t *drive, int mask) |
1da177e4 | 74 | { |
ac95beed BZ |
75 | 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); | |
1da177e4 LT |
79 | } |
80 | ||
374e042c | 81 | void ide_exec_command(ide_hwif_t *hwif, u8 cmd) |
c6dfa867 BZ |
82 | { |
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 | } | |
374e042c | 88 | EXPORT_SYMBOL_GPL(ide_exec_command); |
c6dfa867 | 89 | |
374e042c | 90 | u8 ide_read_status(ide_hwif_t *hwif) |
b73c7ee2 BZ |
91 | { |
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 | } | |
374e042c | 97 | EXPORT_SYMBOL_GPL(ide_read_status); |
b73c7ee2 | 98 | |
374e042c | 99 | u8 ide_read_altstatus(ide_hwif_t *hwif) |
1f6d8a0f BZ |
100 | { |
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 | } | |
374e042c | 106 | EXPORT_SYMBOL_GPL(ide_read_altstatus); |
1f6d8a0f | 107 | |
374e042c | 108 | void ide_set_irq(ide_hwif_t *hwif, int on) |
6e6afb3b BZ |
109 | { |
110 | u8 ctl = ATA_DEVCTL_OBS; | |
111 | ||
112 | if (on == 4) { /* hack for SRST */ | |
113 | ctl |= 4; | |
114 | on &= ~4; | |
115 | } | |
116 | ||
117 | ctl |= on ? 0 : 2; | |
118 | ||
119 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
120 | writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); | |
121 | else | |
122 | outb(ctl, hwif->io_ports.ctl_addr); | |
123 | } | |
374e042c | 124 | EXPORT_SYMBOL_GPL(ide_set_irq); |
6e6afb3b | 125 | |
374e042c | 126 | void ide_tf_load(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
127 | { |
128 | ide_hwif_t *hwif = drive->hwif; | |
129 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
130 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
131 | void (*tf_outb)(u8 addr, unsigned long port); |
132 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
d309e0bb BZ |
133 | u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; |
134 | ||
ca545c1e BZ |
135 | if (mmio) |
136 | tf_outb = ide_mm_outb; | |
137 | else | |
138 | tf_outb = ide_outb; | |
139 | ||
d309e0bb BZ |
140 | if (task->tf_flags & IDE_TFLAG_FLAGGED) |
141 | HIHI = 0xFF; | |
142 | ||
ca545c1e BZ |
143 | if (task->tf_flags & IDE_TFLAG_OUT_DATA) { |
144 | u16 data = (tf->hob_data << 8) | tf->data; | |
145 | ||
146 | if (mmio) | |
147 | writew(data, (void __iomem *)io_ports->data_addr); | |
148 | else | |
149 | outw(data, io_ports->data_addr); | |
150 | } | |
d309e0bb BZ |
151 | |
152 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) | |
ca545c1e | 153 | tf_outb(tf->hob_feature, io_ports->feature_addr); |
d309e0bb | 154 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) |
ca545c1e | 155 | tf_outb(tf->hob_nsect, io_ports->nsect_addr); |
d309e0bb | 156 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) |
ca545c1e | 157 | tf_outb(tf->hob_lbal, io_ports->lbal_addr); |
d309e0bb | 158 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) |
ca545c1e | 159 | tf_outb(tf->hob_lbam, io_ports->lbam_addr); |
d309e0bb | 160 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) |
ca545c1e | 161 | tf_outb(tf->hob_lbah, io_ports->lbah_addr); |
d309e0bb BZ |
162 | |
163 | if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) | |
ca545c1e | 164 | tf_outb(tf->feature, io_ports->feature_addr); |
d309e0bb | 165 | if (task->tf_flags & IDE_TFLAG_OUT_NSECT) |
ca545c1e | 166 | tf_outb(tf->nsect, io_ports->nsect_addr); |
d309e0bb | 167 | if (task->tf_flags & IDE_TFLAG_OUT_LBAL) |
ca545c1e | 168 | tf_outb(tf->lbal, io_ports->lbal_addr); |
d309e0bb | 169 | if (task->tf_flags & IDE_TFLAG_OUT_LBAM) |
ca545c1e | 170 | tf_outb(tf->lbam, io_ports->lbam_addr); |
d309e0bb | 171 | if (task->tf_flags & IDE_TFLAG_OUT_LBAH) |
ca545c1e | 172 | tf_outb(tf->lbah, io_ports->lbah_addr); |
d309e0bb BZ |
173 | |
174 | if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) | |
7f612f27 | 175 | tf_outb((tf->device & HIHI) | drive->select, |
ca545c1e | 176 | io_ports->device_addr); |
d309e0bb | 177 | } |
374e042c | 178 | EXPORT_SYMBOL_GPL(ide_tf_load); |
d309e0bb | 179 | |
374e042c | 180 | void ide_tf_read(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
181 | { |
182 | ide_hwif_t *hwif = drive->hwif; | |
183 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
184 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
185 | void (*tf_outb)(u8 addr, unsigned long port); |
186 | u8 (*tf_inb)(unsigned long port); | |
187 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
188 | ||
189 | if (mmio) { | |
190 | tf_outb = ide_mm_outb; | |
191 | tf_inb = ide_mm_inb; | |
192 | } else { | |
193 | tf_outb = ide_outb; | |
194 | tf_inb = ide_inb; | |
195 | } | |
d309e0bb BZ |
196 | |
197 | if (task->tf_flags & IDE_TFLAG_IN_DATA) { | |
ca545c1e BZ |
198 | u16 data; |
199 | ||
200 | if (mmio) | |
201 | data = readw((void __iomem *)io_ports->data_addr); | |
202 | else | |
203 | data = inw(io_ports->data_addr); | |
d309e0bb BZ |
204 | |
205 | tf->data = data & 0xff; | |
206 | tf->hob_data = (data >> 8) & 0xff; | |
207 | } | |
208 | ||
209 | /* be sure we're looking at the low order bits */ | |
ff074883 | 210 | tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); |
d309e0bb | 211 | |
92eb4380 BZ |
212 | if (task->tf_flags & IDE_TFLAG_IN_FEATURE) |
213 | tf->feature = tf_inb(io_ports->feature_addr); | |
d309e0bb | 214 | if (task->tf_flags & IDE_TFLAG_IN_NSECT) |
ca545c1e | 215 | tf->nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 216 | if (task->tf_flags & IDE_TFLAG_IN_LBAL) |
ca545c1e | 217 | tf->lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 218 | if (task->tf_flags & IDE_TFLAG_IN_LBAM) |
ca545c1e | 219 | tf->lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 220 | if (task->tf_flags & IDE_TFLAG_IN_LBAH) |
ca545c1e | 221 | tf->lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb | 222 | if (task->tf_flags & IDE_TFLAG_IN_DEVICE) |
ca545c1e | 223 | tf->device = tf_inb(io_ports->device_addr); |
d309e0bb BZ |
224 | |
225 | if (task->tf_flags & IDE_TFLAG_LBA48) { | |
ff074883 | 226 | tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); |
d309e0bb BZ |
227 | |
228 | if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) | |
ca545c1e | 229 | tf->hob_feature = tf_inb(io_ports->feature_addr); |
d309e0bb | 230 | if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) |
ca545c1e | 231 | tf->hob_nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 232 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) |
ca545c1e | 233 | tf->hob_lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 234 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) |
ca545c1e | 235 | tf->hob_lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 236 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) |
ca545c1e | 237 | tf->hob_lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb BZ |
238 | } |
239 | } | |
374e042c | 240 | EXPORT_SYMBOL_GPL(ide_tf_read); |
d309e0bb | 241 | |
1da177e4 LT |
242 | /* |
243 | * Some localbus EIDE interfaces require a special access sequence | |
244 | * when using 32-bit I/O instructions to transfer data. We call this | |
245 | * the "vlb_sync" sequence, which consists of three successive reads | |
246 | * of the sector count register location, with interrupts disabled | |
247 | * to ensure that the reads all happen together. | |
248 | */ | |
22cdd6ce | 249 | static void ata_vlb_sync(unsigned long port) |
1da177e4 | 250 | { |
22cdd6ce BZ |
251 | (void)inb(port); |
252 | (void)inb(port); | |
253 | (void)inb(port); | |
1da177e4 LT |
254 | } |
255 | ||
256 | /* | |
257 | * This is used for most PIO data transfers *from* the IDE interface | |
9567b349 BZ |
258 | * |
259 | * These routines will round up any request for an odd number of bytes, | |
260 | * so if an odd len is specified, be sure that there's at least one | |
261 | * extra byte allocated for the buffer. | |
1da177e4 | 262 | */ |
374e042c BZ |
263 | void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, |
264 | unsigned int len) | |
1da177e4 | 265 | { |
4c3032d8 BZ |
266 | ide_hwif_t *hwif = drive->hwif; |
267 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 268 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 269 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 270 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 | 271 | |
9567b349 BZ |
272 | len++; |
273 | ||
1da177e4 | 274 | if (io_32bit) { |
16bb69c1 | 275 | unsigned long uninitialized_var(flags); |
23579a2a | 276 | |
22cdd6ce | 277 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 278 | local_irq_save(flags); |
22cdd6ce | 279 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
280 | } |
281 | ||
282 | if (mmio) | |
283 | __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); | |
284 | else | |
285 | insl(data_addr, buf, len / 4); | |
286 | ||
22cdd6ce | 287 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 288 | local_irq_restore(flags); |
9567b349 | 289 | |
16bb69c1 BZ |
290 | if ((len & 3) >= 2) { |
291 | if (mmio) | |
292 | __ide_mm_insw((void __iomem *)data_addr, | |
293 | (u8 *)buf + (len & ~3), 1); | |
294 | else | |
295 | insw(data_addr, (u8 *)buf + (len & ~3), 1); | |
296 | } | |
297 | } else { | |
298 | if (mmio) | |
299 | __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); | |
300 | else | |
301 | insw(data_addr, buf, len / 2); | |
302 | } | |
1da177e4 | 303 | } |
374e042c | 304 | EXPORT_SYMBOL_GPL(ide_input_data); |
1da177e4 LT |
305 | |
306 | /* | |
307 | * This is used for most PIO data transfers *to* the IDE interface | |
308 | */ | |
374e042c BZ |
309 | void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, |
310 | unsigned int len) | |
1da177e4 | 311 | { |
4c3032d8 BZ |
312 | ide_hwif_t *hwif = drive->hwif; |
313 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 314 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 315 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 316 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 LT |
317 | |
318 | if (io_32bit) { | |
16bb69c1 | 319 | unsigned long uninitialized_var(flags); |
23579a2a | 320 | |
22cdd6ce | 321 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 322 | local_irq_save(flags); |
22cdd6ce | 323 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
324 | } |
325 | ||
326 | if (mmio) | |
327 | __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); | |
328 | else | |
329 | outsl(data_addr, buf, len / 4); | |
330 | ||
22cdd6ce | 331 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 332 | local_irq_restore(flags); |
1da177e4 | 333 | |
16bb69c1 BZ |
334 | if ((len & 3) >= 2) { |
335 | if (mmio) | |
336 | __ide_mm_outsw((void __iomem *)data_addr, | |
337 | (u8 *)buf + (len & ~3), 1); | |
338 | else | |
339 | outsw(data_addr, (u8 *)buf + (len & ~3), 1); | |
340 | } | |
341 | } else { | |
342 | if (mmio) | |
343 | __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); | |
344 | else | |
345 | outsw(data_addr, buf, len / 2); | |
346 | } | |
1da177e4 | 347 | } |
374e042c | 348 | EXPORT_SYMBOL_GPL(ide_output_data); |
1da177e4 | 349 | |
92eb4380 BZ |
350 | u8 ide_read_error(ide_drive_t *drive) |
351 | { | |
352 | ide_task_t task; | |
353 | ||
354 | memset(&task, 0, sizeof(task)); | |
355 | task.tf_flags = IDE_TFLAG_IN_FEATURE; | |
356 | ||
374e042c | 357 | drive->hwif->tp_ops->tf_read(drive, &task); |
92eb4380 BZ |
358 | |
359 | return task.tf.error; | |
360 | } | |
361 | EXPORT_SYMBOL_GPL(ide_read_error); | |
362 | ||
1823649b BZ |
363 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
364 | { | |
365 | ide_task_t task; | |
366 | ||
367 | memset(&task, 0, sizeof(task)); | |
368 | task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | | |
369 | IDE_TFLAG_IN_NSECT; | |
370 | ||
374e042c | 371 | drive->hwif->tp_ops->tf_read(drive, &task); |
1823649b BZ |
372 | |
373 | *bcount = (task.tf.lbah << 8) | task.tf.lbam; | |
374 | *ireason = task.tf.nsect & 3; | |
375 | } | |
376 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
377 | ||
374e042c BZ |
378 | const struct ide_tp_ops default_tp_ops = { |
379 | .exec_command = ide_exec_command, | |
380 | .read_status = ide_read_status, | |
381 | .read_altstatus = ide_read_altstatus, | |
374e042c BZ |
382 | |
383 | .set_irq = ide_set_irq, | |
384 | ||
385 | .tf_load = ide_tf_load, | |
386 | .tf_read = ide_tf_read, | |
387 | ||
388 | .input_data = ide_input_data, | |
389 | .output_data = ide_output_data, | |
390 | }; | |
391 | ||
4dde4492 | 392 | void ide_fix_driveid(u16 *id) |
1da177e4 LT |
393 | { |
394 | #ifndef __LITTLE_ENDIAN | |
395 | # ifdef __BIG_ENDIAN | |
396 | int i; | |
5b90e990 | 397 | |
48fb2688 | 398 | for (i = 0; i < 256; i++) |
5b90e990 | 399 | id[i] = __le16_to_cpu(id[i]); |
1da177e4 LT |
400 | # else |
401 | # error "Please fix <asm/byteorder.h>" | |
402 | # endif | |
403 | #endif | |
404 | } | |
405 | ||
01745112 BZ |
406 | /* |
407 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
408 | * removing leading/trailing blanks and compressing internal blanks. | |
409 | * It is primarily used to tidy up the model name/number fields as | |
aaaade3f | 410 | * returned by the ATA_CMD_ID_ATA[PI] commands. |
01745112 BZ |
411 | */ |
412 | ||
1da177e4 LT |
413 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
414 | { | |
1a7809e3 | 415 | u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
1da177e4 LT |
416 | |
417 | if (byteswap) { | |
418 | /* convert from big-endian to host byte order */ | |
1a7809e3 LT |
419 | for (p = s ; p != end ; p += 2) |
420 | be16_to_cpus((u16 *) p); | |
1da177e4 | 421 | } |
1a7809e3 | 422 | |
1da177e4 | 423 | /* strip leading blanks */ |
1a7809e3 | 424 | p = s; |
1da177e4 LT |
425 | while (s != end && *s == ' ') |
426 | ++s; | |
427 | /* compress internal blanks and strip trailing blanks */ | |
428 | while (s != end && *s) { | |
429 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
430 | *p++ = *(s-1); | |
431 | } | |
432 | /* wipe out trailing garbage */ | |
433 | while (p != end) | |
434 | *p++ = '\0'; | |
435 | } | |
436 | ||
437 | EXPORT_SYMBOL(ide_fixstring); | |
438 | ||
439 | /* | |
440 | * Needed for PCI irq sharing | |
441 | */ | |
442 | int drive_is_ready (ide_drive_t *drive) | |
443 | { | |
898ec223 | 444 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
445 | u8 stat = 0; |
446 | ||
447 | if (drive->waiting_for_dma) | |
5e37bdc0 | 448 | return hwif->dma_ops->dma_test_irq(drive); |
1da177e4 | 449 | |
1da177e4 LT |
450 | /* |
451 | * We do a passive status test under shared PCI interrupts on | |
452 | * cards that truly share the ATA side interrupt, but may also share | |
453 | * an interrupt with another pci card/device. We make no assumptions | |
454 | * about possible isa-pnp and pci-pnp issues yet. | |
455 | */ | |
6636487e BZ |
456 | if (hwif->io_ports.ctl_addr && |
457 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) | |
374e042c | 458 | stat = hwif->tp_ops->read_altstatus(hwif); |
1da177e4 | 459 | else |
1da177e4 | 460 | /* Note: this may clear a pending IRQ!! */ |
374e042c | 461 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 462 | |
3a7d2484 | 463 | if (stat & ATA_BUSY) |
1da177e4 LT |
464 | /* drive busy: definitely not interrupting */ |
465 | return 0; | |
466 | ||
467 | /* drive ready: *might* be interrupting */ | |
468 | return 1; | |
469 | } | |
470 | ||
471 | EXPORT_SYMBOL(drive_is_ready); | |
472 | ||
1da177e4 LT |
473 | /* |
474 | * This routine busy-waits for the drive status to be not "busy". | |
475 | * It then checks the status for all of the "good" bits and none | |
476 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 477 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
478 | * |
479 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
480 | * That could be done by busy-waiting for the first jiffy or two, and then | |
481 | * setting a timer to wake up at half second intervals thereafter, | |
482 | * until timeout is achieved, before timing out. | |
483 | */ | |
aedea591 | 484 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 485 | { |
b73c7ee2 | 486 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 487 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 | 488 | unsigned long flags; |
74af21cf BZ |
489 | int i; |
490 | u8 stat; | |
1da177e4 LT |
491 | |
492 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 493 | stat = tp_ops->read_status(hwif); |
c47137a9 | 494 | |
3a7d2484 | 495 | if (stat & ATA_BUSY) { |
54cc1428 BZ |
496 | local_irq_save(flags); |
497 | local_irq_enable_in_hardirq(); | |
1da177e4 | 498 | timeout += jiffies; |
3a7d2484 | 499 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
500 | if (time_after(jiffies, timeout)) { |
501 | /* | |
502 | * One last read after the timeout in case | |
503 | * heavy interrupt load made us not make any | |
504 | * progress during the timeout.. | |
505 | */ | |
374e042c | 506 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 507 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
508 | break; |
509 | ||
510 | local_irq_restore(flags); | |
74af21cf BZ |
511 | *rstat = stat; |
512 | return -EBUSY; | |
1da177e4 LT |
513 | } |
514 | } | |
515 | local_irq_restore(flags); | |
516 | } | |
517 | /* | |
518 | * Allow status to settle, then read it again. | |
519 | * A few rare drives vastly violate the 400ns spec here, | |
520 | * so we'll wait up to 10usec for a "good" status | |
521 | * rather than expensively fail things immediately. | |
522 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
523 | */ | |
524 | for (i = 0; i < 10; i++) { | |
525 | udelay(1); | |
374e042c | 526 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
527 | |
528 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 529 | *rstat = stat; |
1da177e4 | 530 | return 0; |
74af21cf | 531 | } |
1da177e4 | 532 | } |
74af21cf BZ |
533 | *rstat = stat; |
534 | return -EFAULT; | |
535 | } | |
536 | ||
537 | /* | |
538 | * In case of error returns error value after doing "*startstop = ide_error()". | |
539 | * The caller should return the updated value of "startstop" in this case, | |
540 | * "startstop" is unchanged when the function returns 0. | |
541 | */ | |
542 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
543 | { | |
544 | int err; | |
545 | u8 stat; | |
546 | ||
547 | /* bail early if we've exceeded max_failures */ | |
548 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
549 | *startstop = ide_stopped; | |
550 | return 1; | |
551 | } | |
552 | ||
553 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
554 | ||
555 | if (err) { | |
556 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
557 | *startstop = ide_error(drive, s, stat); | |
558 | } | |
559 | ||
560 | return err; | |
1da177e4 LT |
561 | } |
562 | ||
563 | EXPORT_SYMBOL(ide_wait_stat); | |
564 | ||
a5b7e70d BZ |
565 | /** |
566 | * ide_in_drive_list - look for drive in black/white list | |
567 | * @id: drive identifier | |
4dde4492 | 568 | * @table: list to inspect |
a5b7e70d BZ |
569 | * |
570 | * Look for a drive in the blacklist and the whitelist tables | |
571 | * Returns 1 if the drive is found in the table. | |
572 | */ | |
573 | ||
4dde4492 | 574 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 575 | { |
4dde4492 BZ |
576 | for ( ; table->id_model; table++) |
577 | if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && | |
578 | (!table->id_firmware || | |
579 | strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) | |
a5b7e70d BZ |
580 | return 1; |
581 | return 0; | |
582 | } | |
583 | ||
b0244a00 BZ |
584 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
585 | ||
a5b7e70d BZ |
586 | /* |
587 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
588 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
589 | * |
590 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
591 | */ |
592 | static const struct drive_list_entry ivb_list[] = { | |
593 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 594 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
595 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
596 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
597 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
598 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
599 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
c7b997b3 | 600 | { "SAMSUNG SP0822N" , "WA100-10" }, |
a5b7e70d BZ |
601 | { NULL , NULL } |
602 | }; | |
603 | ||
1da177e4 LT |
604 | /* |
605 | * All hosts that use the 80c ribbon must use! | |
606 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
607 | */ | |
608 | u8 eighty_ninty_three (ide_drive_t *drive) | |
609 | { | |
7f8f48af | 610 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 611 | u16 *id = drive->id; |
a5b7e70d | 612 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 613 | |
49521f97 BZ |
614 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
615 | return 1; | |
616 | ||
a5b7e70d BZ |
617 | if (ivb) |
618 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
619 | drive->name); | |
620 | ||
367d7e78 | 621 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
622 | return 1; |
623 | ||
a5b7e70d | 624 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 625 | goto no_80w; |
1a1276e7 | 626 | |
f68d9320 BZ |
627 | /* |
628 | * FIXME: | |
f367bed0 | 629 | * - change master/slave IDENTIFY order |
a5b7e70d | 630 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
631 | * (unless the slave device is pre-ATA3) |
632 | */ | |
4dde4492 BZ |
633 | if ((id[ATA_ID_HW_CONFIG] & 0x4000) || |
634 | (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000))) | |
7f8f48af BZ |
635 | return 1; |
636 | ||
637 | no_80w: | |
97100fc8 | 638 | if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
7f8f48af BZ |
639 | return 0; |
640 | ||
641 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
642 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
643 | drive->name, |
644 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af | 645 | |
97100fc8 | 646 | drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
7f8f48af BZ |
647 | |
648 | return 0; | |
1da177e4 LT |
649 | } |
650 | ||
8a455134 | 651 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 652 | { |
8a455134 | 653 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 654 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 655 | u16 *id; |
b163f46d | 656 | unsigned long flags; |
c47137a9 | 657 | u8 stat; |
1da177e4 | 658 | |
1da177e4 LT |
659 | /* |
660 | * Re-read drive->id for possible DMA mode | |
661 | * change (copied from ide-probe.c) | |
662 | */ | |
1da177e4 LT |
663 | |
664 | SELECT_MASK(drive, 1); | |
374e042c | 665 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 666 | msleep(50); |
aaaade3f | 667 | tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); |
c47137a9 | 668 | |
b163f46d BZ |
669 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { |
670 | SELECT_MASK(drive, 0); | |
671 | return 0; | |
672 | } | |
c47137a9 | 673 | |
3a7d2484 | 674 | msleep(50); /* wait for IRQ and ATA_DRQ */ |
374e042c | 675 | stat = tp_ops->read_status(hwif); |
c47137a9 | 676 | |
3a7d2484 | 677 | if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
678 | SELECT_MASK(drive, 0); |
679 | printk("%s: CHECK for good STATUS\n", drive->name); | |
680 | return 0; | |
681 | } | |
682 | local_irq_save(flags); | |
683 | SELECT_MASK(drive, 0); | |
151a6701 | 684 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); |
1da177e4 LT |
685 | if (!id) { |
686 | local_irq_restore(flags); | |
687 | return 0; | |
688 | } | |
374e042c BZ |
689 | tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
690 | (void)tp_ops->read_status(hwif); /* clear drive IRQ */ | |
1da177e4 LT |
691 | local_irq_enable(); |
692 | local_irq_restore(flags); | |
693 | ide_fix_driveid(id); | |
4dde4492 BZ |
694 | |
695 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; | |
696 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
697 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
698 | /* anything more ? */ | |
699 | ||
700 | kfree(id); | |
701 | ||
97100fc8 | 702 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive)) |
4dde4492 | 703 | ide_dma_off(drive); |
1da177e4 LT |
704 | |
705 | return 1; | |
1da177e4 LT |
706 | } |
707 | ||
74af21cf | 708 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 709 | { |
74af21cf | 710 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 711 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 712 | u16 *id = drive->id, i; |
89613e66 | 713 | int error = 0; |
1da177e4 | 714 | u8 stat; |
59be2c80 | 715 | ide_task_t task; |
1da177e4 | 716 | |
1da177e4 | 717 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
718 | if (hwif->dma_ops) /* check if host supports DMA */ |
719 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
720 | #endif |
721 | ||
89613e66 | 722 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
48fb2688 | 723 | if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
89613e66 SS |
724 | goto skip; |
725 | ||
1da177e4 LT |
726 | /* |
727 | * Don't use ide_wait_cmd here - it will | |
728 | * attempt to set_geometry and recalibrate, | |
729 | * but for some reason these don't work at | |
730 | * this point (lost interrupt). | |
731 | */ | |
732 | /* | |
733 | * Select the drive, and issue the SETFEATURES command | |
734 | */ | |
735 | disable_irq_nosync(hwif->irq); | |
736 | ||
737 | /* | |
738 | * FIXME: we race against the running IRQ here if | |
739 | * this is called from non IRQ context. If we use | |
740 | * disable_irq() we hang on the error path. Work | |
741 | * is needed. | |
742 | */ | |
743 | ||
744 | udelay(1); | |
745 | SELECT_DRIVE(drive); | |
e5403bff | 746 | SELECT_MASK(drive, 1); |
1da177e4 | 747 | udelay(1); |
374e042c | 748 | tp_ops->set_irq(hwif, 0); |
59be2c80 BZ |
749 | |
750 | memset(&task, 0, sizeof(task)); | |
751 | task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; | |
752 | task.tf.feature = SETFEATURES_XFER; | |
753 | task.tf.nsect = speed; | |
754 | ||
374e042c | 755 | tp_ops->tf_load(drive, &task); |
59be2c80 | 756 | |
aaaade3f | 757 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 758 | |
81ca6919 | 759 | if (drive->quirk_list == 2) |
374e042c | 760 | tp_ops->set_irq(hwif, 1); |
1da177e4 | 761 | |
74af21cf | 762 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 763 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 764 | WAIT_CMD, &stat); |
1da177e4 LT |
765 | |
766 | SELECT_MASK(drive, 0); | |
767 | ||
768 | enable_irq(hwif->irq); | |
769 | ||
770 | if (error) { | |
771 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
772 | return error; | |
773 | } | |
774 | ||
4dde4492 BZ |
775 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; |
776 | id[ATA_ID_MWDMA_MODES] &= ~0x0F00; | |
777 | id[ATA_ID_SWDMA_MODES] &= ~0x0F00; | |
1da177e4 | 778 | |
89613e66 | 779 | skip: |
1da177e4 | 780 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 781 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
782 | hwif->dma_ops->dma_host_set(drive, 1); |
783 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 784 | ide_dma_off_quietly(drive); |
1da177e4 LT |
785 | #endif |
786 | ||
4dde4492 BZ |
787 | if (speed >= XFER_UDMA_0) { |
788 | i = 1 << (speed - XFER_UDMA_0); | |
789 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
790 | } else if (speed >= XFER_MW_DMA_0) { | |
791 | i = 1 << (speed - XFER_MW_DMA_0); | |
792 | id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); | |
793 | } else if (speed >= XFER_SW_DMA_0) { | |
794 | i = 1 << (speed - XFER_SW_DMA_0); | |
795 | id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); | |
1da177e4 | 796 | } |
4dde4492 | 797 | |
1da177e4 LT |
798 | if (!drive->init_speed) |
799 | drive->init_speed = speed; | |
800 | drive->current_speed = speed; | |
801 | return error; | |
802 | } | |
803 | ||
1da177e4 LT |
804 | /* |
805 | * This should get invoked any time we exit the driver to | |
806 | * wait for an interrupt response from a drive. handler() points | |
807 | * at the appropriate code to handle the next interrupt, and a | |
808 | * timer is started to prevent us from waiting forever in case | |
809 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
810 | * | |
811 | * See also ide_execute_command | |
812 | */ | |
813 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
814 | unsigned int timeout, ide_expiry_t *expiry) | |
815 | { | |
b65fac32 BZ |
816 | ide_hwif_t *hwif = drive->hwif; |
817 | ||
818 | BUG_ON(hwif->handler); | |
819 | hwif->handler = handler; | |
820 | hwif->expiry = expiry; | |
821 | hwif->timer.expires = jiffies + timeout; | |
822 | hwif->req_gen_timer = hwif->req_gen; | |
823 | add_timer(&hwif->timer); | |
1da177e4 LT |
824 | } |
825 | ||
826 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
827 | unsigned int timeout, ide_expiry_t *expiry) | |
828 | { | |
b65fac32 | 829 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 830 | unsigned long flags; |
2a2ca6a9 | 831 | |
b65fac32 | 832 | spin_lock_irqsave(&hwif->lock, flags); |
1da177e4 | 833 | __ide_set_handler(drive, handler, timeout, expiry); |
b65fac32 | 834 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 LT |
835 | } |
836 | ||
837 | EXPORT_SYMBOL(ide_set_handler); | |
838 | ||
839 | /** | |
840 | * ide_execute_command - execute an IDE command | |
841 | * @drive: IDE drive to issue the command against | |
842 | * @command: command byte to write | |
843 | * @handler: handler for next phase | |
844 | * @timeout: timeout for command | |
845 | * @expiry: handler to run on timeout | |
846 | * | |
847 | * Helper function to issue an IDE command. This handles the | |
848 | * atomicity requirements, command timing and ensures that the | |
849 | * handler and IRQ setup do not race. All IDE command kick off | |
850 | * should go via this function or do equivalent locking. | |
851 | */ | |
cd2a2d96 BZ |
852 | |
853 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
854 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 | 855 | { |
2a2ca6a9 | 856 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 857 | unsigned long flags; |
629f944b | 858 | |
b65fac32 | 859 | spin_lock_irqsave(&hwif->lock, flags); |
629f944b | 860 | __ide_set_handler(drive, handler, timeout, expiry); |
374e042c | 861 | hwif->tp_ops->exec_command(hwif, cmd); |
629f944b BZ |
862 | /* |
863 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
864 | * serviced before that. | |
865 | * | |
866 | * FIXME: we could skip this delay with care on non shared devices | |
867 | */ | |
1da177e4 | 868 | ndelay(400); |
b65fac32 | 869 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 | 870 | } |
1da177e4 LT |
871 | EXPORT_SYMBOL(ide_execute_command); |
872 | ||
1fc14258 BZ |
873 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
874 | { | |
875 | ide_hwif_t *hwif = drive->hwif; | |
876 | unsigned long flags; | |
877 | ||
b65fac32 | 878 | spin_lock_irqsave(&hwif->lock, flags); |
aaaade3f | 879 | hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET); |
1fc14258 | 880 | ndelay(400); |
b65fac32 | 881 | spin_unlock_irqrestore(&hwif->lock, flags); |
1fc14258 BZ |
882 | } |
883 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 884 | |
64a8f00f | 885 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
79e36a9f | 886 | { |
b65fac32 | 887 | struct request *rq = drive->hwif->rq; |
79e36a9f EO |
888 | |
889 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) | |
64a8f00f | 890 | ide_end_request(drive, err ? err : 1, 0); |
79e36a9f EO |
891 | } |
892 | ||
1da177e4 LT |
893 | /* needed below */ |
894 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
895 | ||
896 | /* | |
897 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
898 | * during an atapi drive reset operation. If the drive has not yet responded, | |
899 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
900 | * for another 50ms. | |
901 | */ | |
902 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
903 | { | |
b73c7ee2 | 904 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
905 | u8 stat; |
906 | ||
907 | SELECT_DRIVE(drive); | |
908 | udelay (10); | |
374e042c | 909 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 910 | |
3a7d2484 | 911 | if (OK_STAT(stat, 0, ATA_BUSY)) |
1da177e4 | 912 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 913 | else { |
b65fac32 | 914 | if (time_before(jiffies, hwif->poll_timeout)) { |
1da177e4 LT |
915 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
916 | /* continue polling */ | |
917 | return ide_started; | |
918 | } | |
919 | /* end of polling */ | |
b65fac32 | 920 | hwif->polling = 0; |
1da177e4 LT |
921 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", |
922 | drive->name, stat); | |
923 | /* do it the old fashioned way */ | |
924 | return do_reset1(drive, 1); | |
925 | } | |
926 | /* done polling */ | |
b65fac32 | 927 | hwif->polling = 0; |
64a8f00f | 928 | ide_complete_drive_reset(drive, 0); |
1da177e4 LT |
929 | return ide_stopped; |
930 | } | |
931 | ||
0e3d84a5 BZ |
932 | static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) |
933 | { | |
934 | static const char *err_master_vals[] = | |
935 | { NULL, "passed", "formatter device error", | |
936 | "sector buffer error", "ECC circuitry error", | |
937 | "controlling MPU error" }; | |
938 | ||
939 | u8 err_master = err & 0x7f; | |
940 | ||
941 | printk(KERN_ERR "%s: reset: master: ", hwif->name); | |
942 | if (err_master && err_master < 6) | |
943 | printk(KERN_CONT "%s", err_master_vals[err_master]); | |
944 | else | |
945 | printk(KERN_CONT "error (0x%02x?)", err); | |
946 | if (err & 0x80) | |
947 | printk(KERN_CONT "; slave: failed"); | |
948 | printk(KERN_CONT "\n"); | |
949 | } | |
950 | ||
1da177e4 LT |
951 | /* |
952 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
953 | * during an ide reset operation. If the drives have not yet responded, | |
954 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
955 | * for another 50ms. | |
956 | */ | |
957 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
958 | { | |
898ec223 | 959 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 960 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 961 | u8 tmp; |
64a8f00f | 962 | int err = 0; |
1da177e4 | 963 | |
ac95beed | 964 | if (port_ops && port_ops->reset_poll) { |
64a8f00f EO |
965 | err = port_ops->reset_poll(drive); |
966 | if (err) { | |
1da177e4 LT |
967 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
968 | hwif->name, drive->name); | |
79e36a9f | 969 | goto out; |
1da177e4 LT |
970 | } |
971 | } | |
972 | ||
374e042c | 973 | tmp = hwif->tp_ops->read_status(hwif); |
c47137a9 | 974 | |
3a7d2484 | 975 | if (!OK_STAT(tmp, 0, ATA_BUSY)) { |
b65fac32 | 976 | if (time_before(jiffies, hwif->poll_timeout)) { |
1da177e4 LT |
977 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
978 | /* continue polling */ | |
979 | return ide_started; | |
980 | } | |
981 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
982 | drive->failures++; | |
64a8f00f | 983 | err = -EIO; |
1da177e4 | 984 | } else { |
64a57fe4 BZ |
985 | tmp = ide_read_error(drive); |
986 | ||
987 | if (tmp == 1) { | |
0e3d84a5 | 988 | printk(KERN_INFO "%s: reset: success\n", hwif->name); |
1da177e4 LT |
989 | drive->failures = 0; |
990 | } else { | |
0e3d84a5 | 991 | ide_reset_report_error(hwif, tmp); |
1da177e4 | 992 | drive->failures++; |
64a8f00f | 993 | err = -EIO; |
1da177e4 LT |
994 | } |
995 | } | |
79e36a9f | 996 | out: |
b65fac32 | 997 | hwif->polling = 0; /* done polling */ |
64a8f00f | 998 | ide_complete_drive_reset(drive, err); |
1da177e4 LT |
999 | return ide_stopped; |
1000 | } | |
1001 | ||
1da177e4 LT |
1002 | static void ide_disk_pre_reset(ide_drive_t *drive) |
1003 | { | |
4dde4492 | 1004 | int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; |
1da177e4 LT |
1005 | |
1006 | drive->special.all = 0; | |
1007 | drive->special.b.set_geometry = legacy; | |
1008 | drive->special.b.recalibrate = legacy; | |
97100fc8 | 1009 | |
4ee06b7e | 1010 | drive->mult_count = 0; |
4abdc6ee | 1011 | drive->dev_flags &= ~IDE_DFLAG_PARKED; |
97100fc8 BZ |
1012 | |
1013 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && | |
1014 | (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) | |
1da177e4 | 1015 | drive->mult_req = 0; |
97100fc8 | 1016 | |
1da177e4 LT |
1017 | if (drive->mult_req != drive->mult_count) |
1018 | drive->special.b.set_multmode = 1; | |
1019 | } | |
1020 | ||
1021 | static void pre_reset(ide_drive_t *drive) | |
1022 | { | |
ac95beed BZ |
1023 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
1024 | ||
1da177e4 LT |
1025 | if (drive->media == ide_disk) |
1026 | ide_disk_pre_reset(drive); | |
1027 | else | |
97100fc8 | 1028 | drive->dev_flags |= IDE_DFLAG_POST_RESET; |
1da177e4 | 1029 | |
97100fc8 | 1030 | if (drive->dev_flags & IDE_DFLAG_USING_DMA) { |
99ffbe0e | 1031 | if (drive->crc_count) |
578cfa0d | 1032 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
1033 | else |
1034 | ide_dma_off(drive); | |
1035 | } | |
1036 | ||
97100fc8 BZ |
1037 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { |
1038 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { | |
1039 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1da177e4 LT |
1040 | drive->io_32bit = 0; |
1041 | } | |
1042 | return; | |
1043 | } | |
1da177e4 | 1044 | |
ac95beed BZ |
1045 | if (port_ops && port_ops->pre_reset) |
1046 | port_ops->pre_reset(drive); | |
1da177e4 | 1047 | |
513daadd SS |
1048 | if (drive->current_speed != 0xff) |
1049 | drive->desired_speed = drive->current_speed; | |
1050 | drive->current_speed = 0xff; | |
1da177e4 LT |
1051 | } |
1052 | ||
1053 | /* | |
1054 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1055 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1056 | * the same interface, so it can really be thought of as resetting the | |
1057 | * interface rather than resetting the drive. | |
1058 | * | |
1059 | * ATAPI devices have their own reset mechanism which allows them to be | |
1060 | * individually reset without clobbering other devices on the same interface. | |
1061 | * | |
1062 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1063 | * us know when the reset operation has finished, so we must poll for this. | |
1064 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1065 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1066 | * we set a timer to poll at 50ms intervals. | |
1067 | */ | |
1068 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1069 | { | |
2a2ca6a9 | 1070 | ide_hwif_t *hwif = drive->hwif; |
2a2ca6a9 BZ |
1071 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1072 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; | |
ac95beed | 1073 | const struct ide_port_ops *port_ops; |
2bd24a1c | 1074 | ide_drive_t *tdrive; |
2a2ca6a9 | 1075 | unsigned long flags, timeout; |
2bd24a1c | 1076 | int i; |
4abdc6ee | 1077 | DEFINE_WAIT(wait); |
23579a2a | 1078 | |
b65fac32 | 1079 | spin_lock_irqsave(&hwif->lock, flags); |
374e042c | 1080 | |
1da177e4 | 1081 | /* We must not reset with running handlers */ |
b65fac32 | 1082 | BUG_ON(hwif->handler != NULL); |
1da177e4 LT |
1083 | |
1084 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1085 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
1086 | pre_reset(drive); | |
1087 | SELECT_DRIVE(drive); | |
1088 | udelay (20); | |
aaaade3f | 1089 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
68ad9910 | 1090 | ndelay(400); |
b65fac32 BZ |
1091 | hwif->poll_timeout = jiffies + WAIT_WORSTCASE; |
1092 | hwif->polling = 1; | |
1da177e4 | 1093 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
b65fac32 | 1094 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 LT |
1095 | return ide_started; |
1096 | } | |
1097 | ||
4abdc6ee EO |
1098 | /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ |
1099 | do { | |
1100 | unsigned long now; | |
1101 | ||
1102 | prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); | |
1103 | timeout = jiffies; | |
2bd24a1c | 1104 | ide_port_for_each_dev(i, tdrive, hwif) { |
4abdc6ee EO |
1105 | if (tdrive->dev_flags & IDE_DFLAG_PRESENT && |
1106 | tdrive->dev_flags & IDE_DFLAG_PARKED && | |
1107 | time_after(tdrive->sleep, timeout)) | |
1108 | timeout = tdrive->sleep; | |
1109 | } | |
1110 | ||
1111 | now = jiffies; | |
1112 | if (time_before_eq(timeout, now)) | |
1113 | break; | |
1114 | ||
b65fac32 | 1115 | spin_unlock_irqrestore(&hwif->lock, flags); |
4abdc6ee | 1116 | timeout = schedule_timeout_uninterruptible(timeout - now); |
b65fac32 | 1117 | spin_lock_irqsave(&hwif->lock, flags); |
4abdc6ee EO |
1118 | } while (timeout); |
1119 | finish_wait(&ide_park_wq, &wait); | |
1120 | ||
1da177e4 LT |
1121 | /* |
1122 | * First, reset any device state data we were maintaining | |
1123 | * for any of the drives on this interface. | |
1124 | */ | |
2bd24a1c BZ |
1125 | ide_port_for_each_dev(i, tdrive, hwif) |
1126 | pre_reset(tdrive); | |
1da177e4 | 1127 | |
4c3032d8 | 1128 | if (io_ports->ctl_addr == 0) { |
b65fac32 | 1129 | spin_unlock_irqrestore(&hwif->lock, flags); |
64a8f00f | 1130 | ide_complete_drive_reset(drive, -ENXIO); |
1da177e4 LT |
1131 | return ide_stopped; |
1132 | } | |
1133 | ||
1134 | /* | |
1135 | * Note that we also set nIEN while resetting the device, | |
1136 | * to mask unwanted interrupts from the interface during the reset. | |
1137 | * However, due to the design of PC hardware, this will cause an | |
1138 | * immediate interrupt due to the edge transition it produces. | |
1139 | * This single interrupt gives us a "fast poll" for drives that | |
1140 | * recover from reset very quickly, saving us the first 50ms wait time. | |
6e6afb3b BZ |
1141 | * |
1142 | * TODO: add ->softreset method and stop abusing ->set_irq | |
1da177e4 LT |
1143 | */ |
1144 | /* set SRST and nIEN */ | |
374e042c | 1145 | tp_ops->set_irq(hwif, 4); |
1da177e4 LT |
1146 | /* more than enough time */ |
1147 | udelay(10); | |
6e6afb3b | 1148 | /* clear SRST, leave nIEN (unless device is on the quirk list) */ |
374e042c | 1149 | tp_ops->set_irq(hwif, drive->quirk_list == 2); |
1da177e4 LT |
1150 | /* more than enough time */ |
1151 | udelay(10); | |
b65fac32 BZ |
1152 | hwif->poll_timeout = jiffies + WAIT_WORSTCASE; |
1153 | hwif->polling = 1; | |
1da177e4 LT |
1154 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
1155 | ||
1156 | /* | |
1157 | * Some weird controller like resetting themselves to a strange | |
1158 | * state when the disks are reset this way. At least, the Winbond | |
1159 | * 553 documentation says that | |
1160 | */ | |
ac95beed BZ |
1161 | port_ops = hwif->port_ops; |
1162 | if (port_ops && port_ops->resetproc) | |
1163 | port_ops->resetproc(drive); | |
1da177e4 | 1164 | |
b65fac32 | 1165 | spin_unlock_irqrestore(&hwif->lock, flags); |
1da177e4 LT |
1166 | return ide_started; |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1171 | */ | |
1172 | ||
1173 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1174 | { | |
1175 | return do_reset1(drive, 0); | |
1176 | } | |
1177 | ||
1178 | EXPORT_SYMBOL(ide_do_reset); | |
1179 | ||
1180 | /* | |
1181 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1182 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1183 | */ |
1184 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1185 | { | |
1186 | u8 stat = 0; | |
1187 | ||
1188 | while(timeout--) { | |
1189 | /* | |
1190 | * Turn this into a schedule() sleep once I'm sure | |
1191 | * about locking issues (2.5 work ?). | |
1192 | */ | |
1193 | mdelay(1); | |
374e042c | 1194 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 1195 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
1196 | return 0; |
1197 | /* | |
1198 | * Assume a value of 0xff means nothing is connected to | |
1199 | * the interface and it doesn't implement the pull-down | |
1200 | * resistor on D7. | |
1201 | */ | |
1202 | if (stat == 0xff) | |
1203 | return -ENODEV; | |
6842f8c8 | 1204 | touch_softlockup_watchdog(); |
1e86240f | 1205 | touch_nmi_watchdog(); |
1da177e4 LT |
1206 | } |
1207 | return -EBUSY; | |
1208 | } |