Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
3 | * Copyright (C) 2003 Red Hat <alan@redhat.com> | |
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 | u8 ide_read_sff_dma_status(ide_hwif_t *hwif) |
b2f951aa BZ |
109 | { |
110 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
cab7f8ed | 111 | return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS)); |
b2f951aa | 112 | else |
cab7f8ed | 113 | return inb(hwif->dma_base + ATA_DMA_STATUS); |
b2f951aa | 114 | } |
374e042c | 115 | EXPORT_SYMBOL_GPL(ide_read_sff_dma_status); |
b2f951aa | 116 | |
374e042c | 117 | void ide_set_irq(ide_hwif_t *hwif, int on) |
6e6afb3b BZ |
118 | { |
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 | } | |
374e042c | 133 | EXPORT_SYMBOL_GPL(ide_set_irq); |
6e6afb3b | 134 | |
374e042c | 135 | void ide_tf_load(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
136 | { |
137 | ide_hwif_t *hwif = drive->hwif; | |
138 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
139 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
140 | void (*tf_outb)(u8 addr, unsigned long port); |
141 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
d309e0bb BZ |
142 | u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; |
143 | ||
ca545c1e BZ |
144 | if (mmio) |
145 | tf_outb = ide_mm_outb; | |
146 | else | |
147 | tf_outb = ide_outb; | |
148 | ||
d309e0bb BZ |
149 | if (task->tf_flags & IDE_TFLAG_FLAGGED) |
150 | HIHI = 0xFF; | |
151 | ||
ca545c1e BZ |
152 | 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 | } | |
d309e0bb BZ |
160 | |
161 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) | |
ca545c1e | 162 | tf_outb(tf->hob_feature, io_ports->feature_addr); |
d309e0bb | 163 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) |
ca545c1e | 164 | tf_outb(tf->hob_nsect, io_ports->nsect_addr); |
d309e0bb | 165 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) |
ca545c1e | 166 | tf_outb(tf->hob_lbal, io_ports->lbal_addr); |
d309e0bb | 167 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) |
ca545c1e | 168 | tf_outb(tf->hob_lbam, io_ports->lbam_addr); |
d309e0bb | 169 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) |
ca545c1e | 170 | tf_outb(tf->hob_lbah, io_ports->lbah_addr); |
d309e0bb BZ |
171 | |
172 | if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) | |
ca545c1e | 173 | tf_outb(tf->feature, io_ports->feature_addr); |
d309e0bb | 174 | if (task->tf_flags & IDE_TFLAG_OUT_NSECT) |
ca545c1e | 175 | tf_outb(tf->nsect, io_ports->nsect_addr); |
d309e0bb | 176 | if (task->tf_flags & IDE_TFLAG_OUT_LBAL) |
ca545c1e | 177 | tf_outb(tf->lbal, io_ports->lbal_addr); |
d309e0bb | 178 | if (task->tf_flags & IDE_TFLAG_OUT_LBAM) |
ca545c1e | 179 | tf_outb(tf->lbam, io_ports->lbam_addr); |
d309e0bb | 180 | if (task->tf_flags & IDE_TFLAG_OUT_LBAH) |
ca545c1e | 181 | tf_outb(tf->lbah, io_ports->lbah_addr); |
d309e0bb BZ |
182 | |
183 | if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) | |
7f612f27 | 184 | tf_outb((tf->device & HIHI) | drive->select, |
ca545c1e | 185 | io_ports->device_addr); |
d309e0bb | 186 | } |
374e042c | 187 | EXPORT_SYMBOL_GPL(ide_tf_load); |
d309e0bb | 188 | |
374e042c | 189 | void ide_tf_read(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
190 | { |
191 | ide_hwif_t *hwif = drive->hwif; | |
192 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
193 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
194 | 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 | } | |
d309e0bb BZ |
205 | |
206 | if (task->tf_flags & IDE_TFLAG_IN_DATA) { | |
ca545c1e BZ |
207 | u16 data; |
208 | ||
209 | if (mmio) | |
210 | data = readw((void __iomem *)io_ports->data_addr); | |
211 | else | |
212 | data = inw(io_ports->data_addr); | |
d309e0bb BZ |
213 | |
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 */ | |
ff074883 | 219 | tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); |
d309e0bb | 220 | |
92eb4380 BZ |
221 | if (task->tf_flags & IDE_TFLAG_IN_FEATURE) |
222 | tf->feature = tf_inb(io_ports->feature_addr); | |
d309e0bb | 223 | if (task->tf_flags & IDE_TFLAG_IN_NSECT) |
ca545c1e | 224 | tf->nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 225 | if (task->tf_flags & IDE_TFLAG_IN_LBAL) |
ca545c1e | 226 | tf->lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 227 | if (task->tf_flags & IDE_TFLAG_IN_LBAM) |
ca545c1e | 228 | tf->lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 229 | if (task->tf_flags & IDE_TFLAG_IN_LBAH) |
ca545c1e | 230 | tf->lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb | 231 | if (task->tf_flags & IDE_TFLAG_IN_DEVICE) |
ca545c1e | 232 | tf->device = tf_inb(io_ports->device_addr); |
d309e0bb BZ |
233 | |
234 | if (task->tf_flags & IDE_TFLAG_LBA48) { | |
ff074883 | 235 | tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); |
d309e0bb BZ |
236 | |
237 | if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) | |
ca545c1e | 238 | tf->hob_feature = tf_inb(io_ports->feature_addr); |
d309e0bb | 239 | if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) |
ca545c1e | 240 | tf->hob_nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 241 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) |
ca545c1e | 242 | tf->hob_lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 243 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) |
ca545c1e | 244 | tf->hob_lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 245 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) |
ca545c1e | 246 | tf->hob_lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb BZ |
247 | } |
248 | } | |
374e042c | 249 | EXPORT_SYMBOL_GPL(ide_tf_read); |
d309e0bb | 250 | |
1da177e4 LT |
251 | /* |
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 | */ | |
22cdd6ce | 258 | static void ata_vlb_sync(unsigned long port) |
1da177e4 | 259 | { |
22cdd6ce BZ |
260 | (void)inb(port); |
261 | (void)inb(port); | |
262 | (void)inb(port); | |
1da177e4 LT |
263 | } |
264 | ||
265 | /* | |
266 | * This is used for most PIO data transfers *from* the IDE interface | |
9567b349 BZ |
267 | * |
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. | |
1da177e4 | 271 | */ |
374e042c BZ |
272 | void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, |
273 | unsigned int len) | |
1da177e4 | 274 | { |
4c3032d8 BZ |
275 | ide_hwif_t *hwif = drive->hwif; |
276 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 277 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 278 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 279 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 | 280 | |
9567b349 BZ |
281 | len++; |
282 | ||
1da177e4 | 283 | if (io_32bit) { |
16bb69c1 | 284 | unsigned long uninitialized_var(flags); |
23579a2a | 285 | |
22cdd6ce | 286 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 287 | local_irq_save(flags); |
22cdd6ce | 288 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
289 | } |
290 | ||
291 | if (mmio) | |
292 | __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); | |
293 | else | |
294 | insl(data_addr, buf, len / 4); | |
295 | ||
22cdd6ce | 296 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 297 | local_irq_restore(flags); |
9567b349 | 298 | |
16bb69c1 BZ |
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 | } | |
1da177e4 | 312 | } |
374e042c | 313 | EXPORT_SYMBOL_GPL(ide_input_data); |
1da177e4 LT |
314 | |
315 | /* | |
316 | * This is used for most PIO data transfers *to* the IDE interface | |
317 | */ | |
374e042c BZ |
318 | void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, |
319 | unsigned int len) | |
1da177e4 | 320 | { |
4c3032d8 BZ |
321 | ide_hwif_t *hwif = drive->hwif; |
322 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 323 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 324 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 325 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 LT |
326 | |
327 | if (io_32bit) { | |
16bb69c1 | 328 | unsigned long uninitialized_var(flags); |
23579a2a | 329 | |
22cdd6ce | 330 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 331 | local_irq_save(flags); |
22cdd6ce | 332 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
333 | } |
334 | ||
335 | if (mmio) | |
336 | __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); | |
337 | else | |
338 | outsl(data_addr, buf, len / 4); | |
339 | ||
22cdd6ce | 340 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 341 | local_irq_restore(flags); |
1da177e4 | 342 | |
16bb69c1 BZ |
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 | } | |
1da177e4 | 356 | } |
374e042c | 357 | EXPORT_SYMBOL_GPL(ide_output_data); |
1da177e4 | 358 | |
92eb4380 BZ |
359 | u8 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 | ||
374e042c | 366 | drive->hwif->tp_ops->tf_read(drive, &task); |
92eb4380 BZ |
367 | |
368 | return task.tf.error; | |
369 | } | |
370 | EXPORT_SYMBOL_GPL(ide_read_error); | |
371 | ||
1823649b BZ |
372 | void 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 | ||
374e042c | 380 | drive->hwif->tp_ops->tf_read(drive, &task); |
1823649b BZ |
381 | |
382 | *bcount = (task.tf.lbah << 8) | task.tf.lbam; | |
383 | *ireason = task.tf.nsect & 3; | |
384 | } | |
385 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
386 | ||
374e042c BZ |
387 | const 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 | ||
4dde4492 | 402 | void ide_fix_driveid(u16 *id) |
1da177e4 LT |
403 | { |
404 | #ifndef __LITTLE_ENDIAN | |
405 | # ifdef __BIG_ENDIAN | |
406 | int i; | |
5b90e990 | 407 | |
48fb2688 | 408 | for (i = 0; i < 256; i++) |
5b90e990 | 409 | id[i] = __le16_to_cpu(id[i]); |
1da177e4 LT |
410 | # else |
411 | # error "Please fix <asm/byteorder.h>" | |
412 | # endif | |
413 | #endif | |
414 | } | |
415 | ||
01745112 BZ |
416 | /* |
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 | |
aaaade3f | 420 | * returned by the ATA_CMD_ID_ATA[PI] commands. |
01745112 BZ |
421 | */ |
422 | ||
1da177e4 LT |
423 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
424 | { | |
1a7809e3 | 425 | u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
1da177e4 LT |
426 | |
427 | if (byteswap) { | |
428 | /* convert from big-endian to host byte order */ | |
1a7809e3 LT |
429 | for (p = s ; p != end ; p += 2) |
430 | be16_to_cpus((u16 *) p); | |
1da177e4 | 431 | } |
1a7809e3 | 432 | |
1da177e4 | 433 | /* strip leading blanks */ |
1a7809e3 | 434 | p = s; |
1da177e4 LT |
435 | 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 | ||
447 | EXPORT_SYMBOL(ide_fixstring); | |
448 | ||
449 | /* | |
450 | * Needed for PCI irq sharing | |
451 | */ | |
452 | int 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) | |
5e37bdc0 | 458 | return hwif->dma_ops->dma_test_irq(drive); |
1da177e4 LT |
459 | |
460 | #if 0 | |
461 | /* need to guarantee 400ns since last command was issued */ | |
462 | udelay(1); | |
463 | #endif | |
464 | ||
1da177e4 LT |
465 | /* |
466 | * We do a passive status test under shared PCI interrupts on | |
467 | * cards that truly share the ATA side interrupt, but may also share | |
468 | * an interrupt with another pci card/device. We make no assumptions | |
469 | * about possible isa-pnp and pci-pnp issues yet. | |
470 | */ | |
4c3032d8 | 471 | if (hwif->io_ports.ctl_addr) |
374e042c | 472 | stat = hwif->tp_ops->read_altstatus(hwif); |
1da177e4 | 473 | else |
1da177e4 | 474 | /* Note: this may clear a pending IRQ!! */ |
374e042c | 475 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 476 | |
3a7d2484 | 477 | if (stat & ATA_BUSY) |
1da177e4 LT |
478 | /* drive busy: definitely not interrupting */ |
479 | return 0; | |
480 | ||
481 | /* drive ready: *might* be interrupting */ | |
482 | return 1; | |
483 | } | |
484 | ||
485 | EXPORT_SYMBOL(drive_is_ready); | |
486 | ||
1da177e4 LT |
487 | /* |
488 | * This routine busy-waits for the drive status to be not "busy". | |
489 | * It then checks the status for all of the "good" bits and none | |
490 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 491 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
492 | * |
493 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
494 | * That could be done by busy-waiting for the first jiffy or two, and then | |
495 | * setting a timer to wake up at half second intervals thereafter, | |
496 | * until timeout is achieved, before timing out. | |
497 | */ | |
aedea591 | 498 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 499 | { |
b73c7ee2 | 500 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 501 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 | 502 | unsigned long flags; |
74af21cf BZ |
503 | int i; |
504 | u8 stat; | |
1da177e4 LT |
505 | |
506 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 507 | stat = tp_ops->read_status(hwif); |
c47137a9 | 508 | |
3a7d2484 | 509 | if (stat & ATA_BUSY) { |
1da177e4 LT |
510 | local_irq_set(flags); |
511 | timeout += jiffies; | |
3a7d2484 | 512 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
513 | if (time_after(jiffies, timeout)) { |
514 | /* | |
515 | * One last read after the timeout in case | |
516 | * heavy interrupt load made us not make any | |
517 | * progress during the timeout.. | |
518 | */ | |
374e042c | 519 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 520 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
521 | break; |
522 | ||
523 | local_irq_restore(flags); | |
74af21cf BZ |
524 | *rstat = stat; |
525 | return -EBUSY; | |
1da177e4 LT |
526 | } |
527 | } | |
528 | local_irq_restore(flags); | |
529 | } | |
530 | /* | |
531 | * Allow status to settle, then read it again. | |
532 | * A few rare drives vastly violate the 400ns spec here, | |
533 | * so we'll wait up to 10usec for a "good" status | |
534 | * rather than expensively fail things immediately. | |
535 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
536 | */ | |
537 | for (i = 0; i < 10; i++) { | |
538 | udelay(1); | |
374e042c | 539 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
540 | |
541 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 542 | *rstat = stat; |
1da177e4 | 543 | return 0; |
74af21cf | 544 | } |
1da177e4 | 545 | } |
74af21cf BZ |
546 | *rstat = stat; |
547 | return -EFAULT; | |
548 | } | |
549 | ||
550 | /* | |
551 | * In case of error returns error value after doing "*startstop = ide_error()". | |
552 | * The caller should return the updated value of "startstop" in this case, | |
553 | * "startstop" is unchanged when the function returns 0. | |
554 | */ | |
555 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
556 | { | |
557 | int err; | |
558 | u8 stat; | |
559 | ||
560 | /* bail early if we've exceeded max_failures */ | |
561 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
562 | *startstop = ide_stopped; | |
563 | return 1; | |
564 | } | |
565 | ||
566 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
567 | ||
568 | if (err) { | |
569 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
570 | *startstop = ide_error(drive, s, stat); | |
571 | } | |
572 | ||
573 | return err; | |
1da177e4 LT |
574 | } |
575 | ||
576 | EXPORT_SYMBOL(ide_wait_stat); | |
577 | ||
a5b7e70d BZ |
578 | /** |
579 | * ide_in_drive_list - look for drive in black/white list | |
580 | * @id: drive identifier | |
4dde4492 | 581 | * @table: list to inspect |
a5b7e70d BZ |
582 | * |
583 | * Look for a drive in the blacklist and the whitelist tables | |
584 | * Returns 1 if the drive is found in the table. | |
585 | */ | |
586 | ||
4dde4492 | 587 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 588 | { |
4dde4492 BZ |
589 | for ( ; table->id_model; table++) |
590 | if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && | |
591 | (!table->id_firmware || | |
592 | strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) | |
a5b7e70d BZ |
593 | return 1; |
594 | return 0; | |
595 | } | |
596 | ||
b0244a00 BZ |
597 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
598 | ||
a5b7e70d BZ |
599 | /* |
600 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
601 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
602 | * |
603 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
604 | */ |
605 | static const struct drive_list_entry ivb_list[] = { | |
606 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 607 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
608 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
609 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
610 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
611 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
612 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
a5b7e70d BZ |
613 | { NULL , NULL } |
614 | }; | |
615 | ||
1da177e4 LT |
616 | /* |
617 | * All hosts that use the 80c ribbon must use! | |
618 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
619 | */ | |
620 | u8 eighty_ninty_three (ide_drive_t *drive) | |
621 | { | |
7f8f48af | 622 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 623 | u16 *id = drive->id; |
a5b7e70d | 624 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 625 | |
49521f97 BZ |
626 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
627 | return 1; | |
628 | ||
a5b7e70d BZ |
629 | if (ivb) |
630 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
631 | drive->name); | |
632 | ||
367d7e78 | 633 | if (ata_id_is_sata(id) && !ivb) |
b98f8803 GK |
634 | return 1; |
635 | ||
a5b7e70d | 636 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 637 | goto no_80w; |
1a1276e7 | 638 | |
f68d9320 BZ |
639 | /* |
640 | * FIXME: | |
f367bed0 | 641 | * - change master/slave IDENTIFY order |
a5b7e70d | 642 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
643 | * (unless the slave device is pre-ATA3) |
644 | */ | |
4dde4492 BZ |
645 | if ((id[ATA_ID_HW_CONFIG] & 0x4000) || |
646 | (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000))) | |
7f8f48af BZ |
647 | return 1; |
648 | ||
649 | no_80w: | |
97100fc8 | 650 | if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
7f8f48af BZ |
651 | return 0; |
652 | ||
653 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
654 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
655 | drive->name, |
656 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af | 657 | |
97100fc8 | 658 | drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
7f8f48af BZ |
659 | |
660 | return 0; | |
1da177e4 LT |
661 | } |
662 | ||
8a455134 | 663 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 664 | { |
8a455134 | 665 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 666 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 667 | u16 *id; |
b163f46d | 668 | unsigned long flags; |
c47137a9 | 669 | u8 stat; |
1da177e4 | 670 | |
1da177e4 LT |
671 | /* |
672 | * Re-read drive->id for possible DMA mode | |
673 | * change (copied from ide-probe.c) | |
674 | */ | |
1da177e4 LT |
675 | |
676 | SELECT_MASK(drive, 1); | |
374e042c | 677 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 678 | msleep(50); |
aaaade3f | 679 | tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); |
c47137a9 | 680 | |
b163f46d BZ |
681 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 1)) { |
682 | SELECT_MASK(drive, 0); | |
683 | return 0; | |
684 | } | |
c47137a9 | 685 | |
3a7d2484 | 686 | msleep(50); /* wait for IRQ and ATA_DRQ */ |
374e042c | 687 | stat = tp_ops->read_status(hwif); |
c47137a9 | 688 | |
3a7d2484 | 689 | if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
690 | SELECT_MASK(drive, 0); |
691 | printk("%s: CHECK for good STATUS\n", drive->name); | |
692 | return 0; | |
693 | } | |
694 | local_irq_save(flags); | |
695 | SELECT_MASK(drive, 0); | |
151a6701 | 696 | id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); |
1da177e4 LT |
697 | if (!id) { |
698 | local_irq_restore(flags); | |
699 | return 0; | |
700 | } | |
374e042c BZ |
701 | tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
702 | (void)tp_ops->read_status(hwif); /* clear drive IRQ */ | |
1da177e4 LT |
703 | local_irq_enable(); |
704 | local_irq_restore(flags); | |
705 | ide_fix_driveid(id); | |
4dde4492 BZ |
706 | |
707 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; | |
708 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
709 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
710 | /* anything more ? */ | |
711 | ||
712 | kfree(id); | |
713 | ||
97100fc8 | 714 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive)) |
4dde4492 | 715 | ide_dma_off(drive); |
1da177e4 LT |
716 | |
717 | return 1; | |
1da177e4 LT |
718 | } |
719 | ||
74af21cf | 720 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 721 | { |
74af21cf | 722 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 723 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 724 | u16 *id = drive->id, i; |
89613e66 | 725 | int error = 0; |
1da177e4 | 726 | u8 stat; |
59be2c80 | 727 | ide_task_t task; |
1da177e4 | 728 | |
1da177e4 | 729 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
730 | if (hwif->dma_ops) /* check if host supports DMA */ |
731 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
732 | #endif |
733 | ||
89613e66 | 734 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
48fb2688 | 735 | if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
89613e66 SS |
736 | goto skip; |
737 | ||
1da177e4 LT |
738 | /* |
739 | * Don't use ide_wait_cmd here - it will | |
740 | * attempt to set_geometry and recalibrate, | |
741 | * but for some reason these don't work at | |
742 | * this point (lost interrupt). | |
743 | */ | |
744 | /* | |
745 | * Select the drive, and issue the SETFEATURES command | |
746 | */ | |
747 | disable_irq_nosync(hwif->irq); | |
748 | ||
749 | /* | |
750 | * FIXME: we race against the running IRQ here if | |
751 | * this is called from non IRQ context. If we use | |
752 | * disable_irq() we hang on the error path. Work | |
753 | * is needed. | |
754 | */ | |
755 | ||
756 | udelay(1); | |
757 | SELECT_DRIVE(drive); | |
758 | SELECT_MASK(drive, 0); | |
759 | udelay(1); | |
374e042c | 760 | tp_ops->set_irq(hwif, 0); |
59be2c80 BZ |
761 | |
762 | memset(&task, 0, sizeof(task)); | |
763 | task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; | |
764 | task.tf.feature = SETFEATURES_XFER; | |
765 | task.tf.nsect = speed; | |
766 | ||
374e042c | 767 | tp_ops->tf_load(drive, &task); |
59be2c80 | 768 | |
aaaade3f | 769 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 770 | |
81ca6919 | 771 | if (drive->quirk_list == 2) |
374e042c | 772 | tp_ops->set_irq(hwif, 1); |
1da177e4 | 773 | |
74af21cf | 774 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 775 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 776 | WAIT_CMD, &stat); |
1da177e4 LT |
777 | |
778 | SELECT_MASK(drive, 0); | |
779 | ||
780 | enable_irq(hwif->irq); | |
781 | ||
782 | if (error) { | |
783 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
784 | return error; | |
785 | } | |
786 | ||
4dde4492 BZ |
787 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; |
788 | id[ATA_ID_MWDMA_MODES] &= ~0x0F00; | |
789 | id[ATA_ID_SWDMA_MODES] &= ~0x0F00; | |
1da177e4 | 790 | |
89613e66 | 791 | skip: |
1da177e4 | 792 | #ifdef CONFIG_BLK_DEV_IDEDMA |
97100fc8 | 793 | if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
5e37bdc0 BZ |
794 | hwif->dma_ops->dma_host_set(drive, 1); |
795 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 796 | ide_dma_off_quietly(drive); |
1da177e4 LT |
797 | #endif |
798 | ||
4dde4492 BZ |
799 | if (speed >= XFER_UDMA_0) { |
800 | i = 1 << (speed - XFER_UDMA_0); | |
801 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
802 | } else if (speed >= XFER_MW_DMA_0) { | |
803 | i = 1 << (speed - XFER_MW_DMA_0); | |
804 | id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); | |
805 | } else if (speed >= XFER_SW_DMA_0) { | |
806 | i = 1 << (speed - XFER_SW_DMA_0); | |
807 | id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); | |
1da177e4 | 808 | } |
4dde4492 | 809 | |
1da177e4 LT |
810 | if (!drive->init_speed) |
811 | drive->init_speed = speed; | |
812 | drive->current_speed = speed; | |
813 | return error; | |
814 | } | |
815 | ||
1da177e4 LT |
816 | /* |
817 | * This should get invoked any time we exit the driver to | |
818 | * wait for an interrupt response from a drive. handler() points | |
819 | * at the appropriate code to handle the next interrupt, and a | |
820 | * timer is started to prevent us from waiting forever in case | |
821 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
822 | * | |
823 | * See also ide_execute_command | |
824 | */ | |
825 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
826 | unsigned int timeout, ide_expiry_t *expiry) | |
827 | { | |
828 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
829 | ||
d30a426d | 830 | BUG_ON(hwgroup->handler); |
1da177e4 LT |
831 | hwgroup->handler = handler; |
832 | hwgroup->expiry = expiry; | |
833 | hwgroup->timer.expires = jiffies + timeout; | |
d30a426d | 834 | hwgroup->req_gen_timer = hwgroup->req_gen; |
1da177e4 LT |
835 | add_timer(&hwgroup->timer); |
836 | } | |
837 | ||
838 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
839 | unsigned int timeout, ide_expiry_t *expiry) | |
840 | { | |
841 | unsigned long flags; | |
842 | spin_lock_irqsave(&ide_lock, flags); | |
843 | __ide_set_handler(drive, handler, timeout, expiry); | |
844 | spin_unlock_irqrestore(&ide_lock, flags); | |
845 | } | |
846 | ||
847 | EXPORT_SYMBOL(ide_set_handler); | |
848 | ||
849 | /** | |
850 | * ide_execute_command - execute an IDE command | |
851 | * @drive: IDE drive to issue the command against | |
852 | * @command: command byte to write | |
853 | * @handler: handler for next phase | |
854 | * @timeout: timeout for command | |
855 | * @expiry: handler to run on timeout | |
856 | * | |
857 | * Helper function to issue an IDE command. This handles the | |
858 | * atomicity requirements, command timing and ensures that the | |
859 | * handler and IRQ setup do not race. All IDE command kick off | |
860 | * should go via this function or do equivalent locking. | |
861 | */ | |
cd2a2d96 BZ |
862 | |
863 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
864 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 LT |
865 | { |
866 | unsigned long flags; | |
1da177e4 | 867 | ide_hwif_t *hwif = HWIF(drive); |
629f944b | 868 | |
1da177e4 | 869 | spin_lock_irqsave(&ide_lock, flags); |
629f944b | 870 | __ide_set_handler(drive, handler, timeout, expiry); |
374e042c | 871 | hwif->tp_ops->exec_command(hwif, cmd); |
629f944b BZ |
872 | /* |
873 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
874 | * serviced before that. | |
875 | * | |
876 | * FIXME: we could skip this delay with care on non shared devices | |
877 | */ | |
1da177e4 LT |
878 | ndelay(400); |
879 | spin_unlock_irqrestore(&ide_lock, flags); | |
880 | } | |
1da177e4 LT |
881 | EXPORT_SYMBOL(ide_execute_command); |
882 | ||
1fc14258 BZ |
883 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
884 | { | |
885 | ide_hwif_t *hwif = drive->hwif; | |
886 | unsigned long flags; | |
887 | ||
888 | spin_lock_irqsave(&ide_lock, flags); | |
aaaade3f | 889 | hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET); |
1fc14258 BZ |
890 | ndelay(400); |
891 | spin_unlock_irqrestore(&ide_lock, flags); | |
892 | } | |
893 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 894 | |
64a8f00f | 895 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
79e36a9f EO |
896 | { |
897 | struct request *rq = drive->hwif->hwgroup->rq; | |
898 | ||
899 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) | |
64a8f00f | 900 | ide_end_request(drive, err ? err : 1, 0); |
79e36a9f EO |
901 | } |
902 | ||
1da177e4 LT |
903 | /* needed below */ |
904 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
905 | ||
906 | /* | |
907 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
908 | * during an atapi drive reset operation. If the drive has not yet responded, | |
909 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
910 | * for another 50ms. | |
911 | */ | |
912 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
913 | { | |
b73c7ee2 BZ |
914 | ide_hwif_t *hwif = drive->hwif; |
915 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
1da177e4 LT |
916 | u8 stat; |
917 | ||
918 | SELECT_DRIVE(drive); | |
919 | udelay (10); | |
374e042c | 920 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 921 | |
3a7d2484 | 922 | if (OK_STAT(stat, 0, ATA_BUSY)) |
1da177e4 | 923 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 924 | else { |
1da177e4 | 925 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
926 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
927 | /* continue polling */ | |
928 | return ide_started; | |
929 | } | |
930 | /* end of polling */ | |
931 | hwgroup->polling = 0; | |
932 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
933 | drive->name, stat); | |
934 | /* do it the old fashioned way */ | |
935 | return do_reset1(drive, 1); | |
936 | } | |
937 | /* done polling */ | |
938 | hwgroup->polling = 0; | |
64a8f00f | 939 | ide_complete_drive_reset(drive, 0); |
1da177e4 LT |
940 | return ide_stopped; |
941 | } | |
942 | ||
0e3d84a5 BZ |
943 | static void ide_reset_report_error(ide_hwif_t *hwif, u8 err) |
944 | { | |
945 | static const char *err_master_vals[] = | |
946 | { NULL, "passed", "formatter device error", | |
947 | "sector buffer error", "ECC circuitry error", | |
948 | "controlling MPU error" }; | |
949 | ||
950 | u8 err_master = err & 0x7f; | |
951 | ||
952 | printk(KERN_ERR "%s: reset: master: ", hwif->name); | |
953 | if (err_master && err_master < 6) | |
954 | printk(KERN_CONT "%s", err_master_vals[err_master]); | |
955 | else | |
956 | printk(KERN_CONT "error (0x%02x?)", err); | |
957 | if (err & 0x80) | |
958 | printk(KERN_CONT "; slave: failed"); | |
959 | printk(KERN_CONT "\n"); | |
960 | } | |
961 | ||
1da177e4 LT |
962 | /* |
963 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
964 | * during an ide reset operation. If the drives have not yet responded, | |
965 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
966 | * for another 50ms. | |
967 | */ | |
968 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
969 | { | |
970 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
971 | ide_hwif_t *hwif = HWIF(drive); | |
ac95beed | 972 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 973 | u8 tmp; |
64a8f00f | 974 | int err = 0; |
1da177e4 | 975 | |
ac95beed | 976 | if (port_ops && port_ops->reset_poll) { |
64a8f00f EO |
977 | err = port_ops->reset_poll(drive); |
978 | if (err) { | |
1da177e4 LT |
979 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
980 | hwif->name, drive->name); | |
79e36a9f | 981 | goto out; |
1da177e4 LT |
982 | } |
983 | } | |
984 | ||
374e042c | 985 | tmp = hwif->tp_ops->read_status(hwif); |
c47137a9 | 986 | |
3a7d2484 | 987 | if (!OK_STAT(tmp, 0, ATA_BUSY)) { |
1da177e4 | 988 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
989 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
990 | /* continue polling */ | |
991 | return ide_started; | |
992 | } | |
993 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
994 | drive->failures++; | |
64a8f00f | 995 | err = -EIO; |
1da177e4 | 996 | } else { |
64a57fe4 BZ |
997 | tmp = ide_read_error(drive); |
998 | ||
999 | if (tmp == 1) { | |
0e3d84a5 | 1000 | printk(KERN_INFO "%s: reset: success\n", hwif->name); |
1da177e4 LT |
1001 | drive->failures = 0; |
1002 | } else { | |
0e3d84a5 | 1003 | ide_reset_report_error(hwif, tmp); |
1da177e4 | 1004 | drive->failures++; |
64a8f00f | 1005 | err = -EIO; |
1da177e4 LT |
1006 | } |
1007 | } | |
79e36a9f | 1008 | out: |
64a8f00f EO |
1009 | hwgroup->polling = 0; /* done polling */ |
1010 | ide_complete_drive_reset(drive, err); | |
1da177e4 LT |
1011 | return ide_stopped; |
1012 | } | |
1013 | ||
1da177e4 LT |
1014 | static void ide_disk_pre_reset(ide_drive_t *drive) |
1015 | { | |
4dde4492 | 1016 | int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; |
1da177e4 LT |
1017 | |
1018 | drive->special.all = 0; | |
1019 | drive->special.b.set_geometry = legacy; | |
1020 | drive->special.b.recalibrate = legacy; | |
97100fc8 | 1021 | |
4ee06b7e | 1022 | drive->mult_count = 0; |
4abdc6ee | 1023 | drive->dev_flags &= ~IDE_DFLAG_PARKED; |
97100fc8 BZ |
1024 | |
1025 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0 && | |
1026 | (drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) | |
1da177e4 | 1027 | drive->mult_req = 0; |
97100fc8 | 1028 | |
1da177e4 LT |
1029 | if (drive->mult_req != drive->mult_count) |
1030 | drive->special.b.set_multmode = 1; | |
1031 | } | |
1032 | ||
1033 | static void pre_reset(ide_drive_t *drive) | |
1034 | { | |
ac95beed BZ |
1035 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
1036 | ||
1da177e4 LT |
1037 | if (drive->media == ide_disk) |
1038 | ide_disk_pre_reset(drive); | |
1039 | else | |
97100fc8 | 1040 | drive->dev_flags |= IDE_DFLAG_POST_RESET; |
1da177e4 | 1041 | |
97100fc8 | 1042 | if (drive->dev_flags & IDE_DFLAG_USING_DMA) { |
99ffbe0e | 1043 | if (drive->crc_count) |
578cfa0d | 1044 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
1045 | else |
1046 | ide_dma_off(drive); | |
1047 | } | |
1048 | ||
97100fc8 BZ |
1049 | if ((drive->dev_flags & IDE_DFLAG_KEEP_SETTINGS) == 0) { |
1050 | if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0) { | |
1051 | drive->dev_flags &= ~IDE_DFLAG_UNMASK; | |
1da177e4 LT |
1052 | drive->io_32bit = 0; |
1053 | } | |
1054 | return; | |
1055 | } | |
1da177e4 | 1056 | |
ac95beed BZ |
1057 | if (port_ops && port_ops->pre_reset) |
1058 | port_ops->pre_reset(drive); | |
1da177e4 | 1059 | |
513daadd SS |
1060 | if (drive->current_speed != 0xff) |
1061 | drive->desired_speed = drive->current_speed; | |
1062 | drive->current_speed = 0xff; | |
1da177e4 LT |
1063 | } |
1064 | ||
1065 | /* | |
1066 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1067 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1068 | * the same interface, so it can really be thought of as resetting the | |
1069 | * interface rather than resetting the drive. | |
1070 | * | |
1071 | * ATAPI devices have their own reset mechanism which allows them to be | |
1072 | * individually reset without clobbering other devices on the same interface. | |
1073 | * | |
1074 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1075 | * us know when the reset operation has finished, so we must poll for this. | |
1076 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1077 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1078 | * we set a timer to poll at 50ms intervals. | |
1079 | */ | |
1080 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1081 | { | |
1082 | unsigned int unit; | |
4abdc6ee | 1083 | unsigned long flags, timeout; |
1da177e4 LT |
1084 | ide_hwif_t *hwif; |
1085 | ide_hwgroup_t *hwgroup; | |
4c3032d8 | 1086 | struct ide_io_ports *io_ports; |
374e042c | 1087 | const struct ide_tp_ops *tp_ops; |
ac95beed | 1088 | const struct ide_port_ops *port_ops; |
4abdc6ee | 1089 | DEFINE_WAIT(wait); |
23579a2a | 1090 | |
1da177e4 LT |
1091 | spin_lock_irqsave(&ide_lock, flags); |
1092 | hwif = HWIF(drive); | |
1093 | hwgroup = HWGROUP(drive); | |
1094 | ||
4c3032d8 BZ |
1095 | io_ports = &hwif->io_ports; |
1096 | ||
374e042c BZ |
1097 | tp_ops = hwif->tp_ops; |
1098 | ||
1da177e4 | 1099 | /* We must not reset with running handlers */ |
125e1874 | 1100 | BUG_ON(hwgroup->handler != NULL); |
1da177e4 LT |
1101 | |
1102 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1103 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
1104 | pre_reset(drive); | |
1105 | SELECT_DRIVE(drive); | |
1106 | udelay (20); | |
aaaade3f | 1107 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
68ad9910 | 1108 | ndelay(400); |
1da177e4 LT |
1109 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1110 | hwgroup->polling = 1; | |
1111 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1112 | spin_unlock_irqrestore(&ide_lock, flags); | |
1113 | return ide_started; | |
1114 | } | |
1115 | ||
4abdc6ee EO |
1116 | /* We must not disturb devices in the IDE_DFLAG_PARKED state. */ |
1117 | do { | |
1118 | unsigned long now; | |
1119 | ||
1120 | prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE); | |
1121 | timeout = jiffies; | |
1122 | for (unit = 0; unit < MAX_DRIVES; unit++) { | |
1123 | ide_drive_t *tdrive = &hwif->drives[unit]; | |
1124 | ||
1125 | if (tdrive->dev_flags & IDE_DFLAG_PRESENT && | |
1126 | tdrive->dev_flags & IDE_DFLAG_PARKED && | |
1127 | time_after(tdrive->sleep, timeout)) | |
1128 | timeout = tdrive->sleep; | |
1129 | } | |
1130 | ||
1131 | now = jiffies; | |
1132 | if (time_before_eq(timeout, now)) | |
1133 | break; | |
1134 | ||
1135 | spin_unlock_irqrestore(&ide_lock, flags); | |
1136 | timeout = schedule_timeout_uninterruptible(timeout - now); | |
1137 | spin_lock_irqsave(&ide_lock, flags); | |
1138 | } while (timeout); | |
1139 | finish_wait(&ide_park_wq, &wait); | |
1140 | ||
1da177e4 LT |
1141 | /* |
1142 | * First, reset any device state data we were maintaining | |
1143 | * for any of the drives on this interface. | |
1144 | */ | |
1145 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1146 | pre_reset(&hwif->drives[unit]); | |
1147 | ||
4c3032d8 | 1148 | if (io_ports->ctl_addr == 0) { |
1da177e4 | 1149 | spin_unlock_irqrestore(&ide_lock, flags); |
64a8f00f | 1150 | ide_complete_drive_reset(drive, -ENXIO); |
1da177e4 LT |
1151 | return ide_stopped; |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * Note that we also set nIEN while resetting the device, | |
1156 | * to mask unwanted interrupts from the interface during the reset. | |
1157 | * However, due to the design of PC hardware, this will cause an | |
1158 | * immediate interrupt due to the edge transition it produces. | |
1159 | * This single interrupt gives us a "fast poll" for drives that | |
1160 | * recover from reset very quickly, saving us the first 50ms wait time. | |
6e6afb3b BZ |
1161 | * |
1162 | * TODO: add ->softreset method and stop abusing ->set_irq | |
1da177e4 LT |
1163 | */ |
1164 | /* set SRST and nIEN */ | |
374e042c | 1165 | tp_ops->set_irq(hwif, 4); |
1da177e4 LT |
1166 | /* more than enough time */ |
1167 | udelay(10); | |
6e6afb3b | 1168 | /* clear SRST, leave nIEN (unless device is on the quirk list) */ |
374e042c | 1169 | tp_ops->set_irq(hwif, drive->quirk_list == 2); |
1da177e4 LT |
1170 | /* more than enough time */ |
1171 | udelay(10); | |
1172 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1173 | hwgroup->polling = 1; | |
1174 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1175 | ||
1176 | /* | |
1177 | * Some weird controller like resetting themselves to a strange | |
1178 | * state when the disks are reset this way. At least, the Winbond | |
1179 | * 553 documentation says that | |
1180 | */ | |
ac95beed BZ |
1181 | port_ops = hwif->port_ops; |
1182 | if (port_ops && port_ops->resetproc) | |
1183 | port_ops->resetproc(drive); | |
1da177e4 LT |
1184 | |
1185 | spin_unlock_irqrestore(&ide_lock, flags); | |
1186 | return ide_started; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1191 | */ | |
1192 | ||
1193 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1194 | { | |
1195 | return do_reset1(drive, 0); | |
1196 | } | |
1197 | ||
1198 | EXPORT_SYMBOL(ide_do_reset); | |
1199 | ||
1200 | /* | |
1201 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1202 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1203 | */ |
1204 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1205 | { | |
1206 | u8 stat = 0; | |
1207 | ||
1208 | while(timeout--) { | |
1209 | /* | |
1210 | * Turn this into a schedule() sleep once I'm sure | |
1211 | * about locking issues (2.5 work ?). | |
1212 | */ | |
1213 | mdelay(1); | |
374e042c | 1214 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 1215 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
1216 | return 0; |
1217 | /* | |
1218 | * Assume a value of 0xff means nothing is connected to | |
1219 | * the interface and it doesn't implement the pull-down | |
1220 | * resistor on D7. | |
1221 | */ | |
1222 | if (stat == 0xff) | |
1223 | return -ENODEV; | |
6842f8c8 | 1224 | touch_softlockup_watchdog(); |
1e86240f | 1225 | touch_nmi_watchdog(); |
1da177e4 LT |
1226 | } |
1227 | return -EBUSY; | |
1228 | } | |
1229 | ||
1230 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1231 |