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Commit | Line | Data |
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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> | |
21 | #include <linux/hdreg.h> | |
22 | #include <linux/ide.h> | |
23 | #include <linux/bitops.h> | |
1e86240f | 24 | #include <linux/nmi.h> |
1da177e4 LT |
25 | |
26 | #include <asm/byteorder.h> | |
27 | #include <asm/irq.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <asm/io.h> | |
30 | ||
31 | /* | |
32 | * Conventional PIO operations for ATA devices | |
33 | */ | |
34 | ||
35 | static u8 ide_inb (unsigned long port) | |
36 | { | |
37 | return (u8) inb(port); | |
38 | } | |
39 | ||
1da177e4 LT |
40 | static void ide_outb (u8 val, unsigned long port) |
41 | { | |
42 | outb(val, port); | |
43 | } | |
44 | ||
1da177e4 LT |
45 | /* |
46 | * MMIO operations, typically used for SATA controllers | |
47 | */ | |
48 | ||
49 | static u8 ide_mm_inb (unsigned long port) | |
50 | { | |
51 | return (u8) readb((void __iomem *) port); | |
52 | } | |
53 | ||
1da177e4 LT |
54 | static void ide_mm_outb (u8 value, unsigned long port) |
55 | { | |
56 | writeb(value, (void __iomem *) port); | |
57 | } | |
58 | ||
1da177e4 LT |
59 | void SELECT_DRIVE (ide_drive_t *drive) |
60 | { | |
23579a2a | 61 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 62 | const struct ide_port_ops *port_ops = hwif->port_ops; |
40f095f0 | 63 | ide_task_t task; |
23579a2a | 64 | |
ac95beed BZ |
65 | if (port_ops && port_ops->selectproc) |
66 | port_ops->selectproc(drive); | |
23579a2a | 67 | |
40f095f0 BZ |
68 | memset(&task, 0, sizeof(task)); |
69 | task.tf_flags = IDE_TFLAG_OUT_DEVICE; | |
70 | ||
374e042c | 71 | drive->hwif->tp_ops->tf_load(drive, &task); |
1da177e4 LT |
72 | } |
73 | ||
ed4af48f | 74 | void SELECT_MASK(ide_drive_t *drive, int mask) |
1da177e4 | 75 | { |
ac95beed BZ |
76 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
77 | ||
78 | if (port_ops && port_ops->maskproc) | |
79 | port_ops->maskproc(drive, mask); | |
1da177e4 LT |
80 | } |
81 | ||
374e042c | 82 | void ide_exec_command(ide_hwif_t *hwif, u8 cmd) |
c6dfa867 BZ |
83 | { |
84 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
85 | writeb(cmd, (void __iomem *)hwif->io_ports.command_addr); | |
86 | else | |
87 | outb(cmd, hwif->io_ports.command_addr); | |
88 | } | |
374e042c | 89 | EXPORT_SYMBOL_GPL(ide_exec_command); |
c6dfa867 | 90 | |
374e042c | 91 | u8 ide_read_status(ide_hwif_t *hwif) |
b73c7ee2 BZ |
92 | { |
93 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
94 | return readb((void __iomem *)hwif->io_ports.status_addr); | |
95 | else | |
96 | return inb(hwif->io_ports.status_addr); | |
97 | } | |
374e042c | 98 | EXPORT_SYMBOL_GPL(ide_read_status); |
b73c7ee2 | 99 | |
374e042c | 100 | u8 ide_read_altstatus(ide_hwif_t *hwif) |
1f6d8a0f BZ |
101 | { |
102 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
103 | return readb((void __iomem *)hwif->io_ports.ctl_addr); | |
104 | else | |
105 | return inb(hwif->io_ports.ctl_addr); | |
106 | } | |
374e042c | 107 | EXPORT_SYMBOL_GPL(ide_read_altstatus); |
1f6d8a0f | 108 | |
374e042c | 109 | u8 ide_read_sff_dma_status(ide_hwif_t *hwif) |
b2f951aa BZ |
110 | { |
111 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
cab7f8ed | 112 | return readb((void __iomem *)(hwif->dma_base + ATA_DMA_STATUS)); |
b2f951aa | 113 | else |
cab7f8ed | 114 | return inb(hwif->dma_base + ATA_DMA_STATUS); |
b2f951aa | 115 | } |
374e042c | 116 | EXPORT_SYMBOL_GPL(ide_read_sff_dma_status); |
b2f951aa | 117 | |
374e042c | 118 | void ide_set_irq(ide_hwif_t *hwif, int on) |
6e6afb3b BZ |
119 | { |
120 | u8 ctl = ATA_DEVCTL_OBS; | |
121 | ||
122 | if (on == 4) { /* hack for SRST */ | |
123 | ctl |= 4; | |
124 | on &= ~4; | |
125 | } | |
126 | ||
127 | ctl |= on ? 0 : 2; | |
128 | ||
129 | if (hwif->host_flags & IDE_HFLAG_MMIO) | |
130 | writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr); | |
131 | else | |
132 | outb(ctl, hwif->io_ports.ctl_addr); | |
133 | } | |
374e042c | 134 | EXPORT_SYMBOL_GPL(ide_set_irq); |
6e6afb3b | 135 | |
374e042c | 136 | void ide_tf_load(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
137 | { |
138 | ide_hwif_t *hwif = drive->hwif; | |
139 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
140 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
141 | void (*tf_outb)(u8 addr, unsigned long port); |
142 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
d309e0bb BZ |
143 | u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF; |
144 | ||
ca545c1e BZ |
145 | if (mmio) |
146 | tf_outb = ide_mm_outb; | |
147 | else | |
148 | tf_outb = ide_outb; | |
149 | ||
d309e0bb BZ |
150 | if (task->tf_flags & IDE_TFLAG_FLAGGED) |
151 | HIHI = 0xFF; | |
152 | ||
ca545c1e BZ |
153 | if (task->tf_flags & IDE_TFLAG_OUT_DATA) { |
154 | u16 data = (tf->hob_data << 8) | tf->data; | |
155 | ||
156 | if (mmio) | |
157 | writew(data, (void __iomem *)io_ports->data_addr); | |
158 | else | |
159 | outw(data, io_ports->data_addr); | |
160 | } | |
d309e0bb BZ |
161 | |
162 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE) | |
ca545c1e | 163 | tf_outb(tf->hob_feature, io_ports->feature_addr); |
d309e0bb | 164 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT) |
ca545c1e | 165 | tf_outb(tf->hob_nsect, io_ports->nsect_addr); |
d309e0bb | 166 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL) |
ca545c1e | 167 | tf_outb(tf->hob_lbal, io_ports->lbal_addr); |
d309e0bb | 168 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM) |
ca545c1e | 169 | tf_outb(tf->hob_lbam, io_ports->lbam_addr); |
d309e0bb | 170 | if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH) |
ca545c1e | 171 | tf_outb(tf->hob_lbah, io_ports->lbah_addr); |
d309e0bb BZ |
172 | |
173 | if (task->tf_flags & IDE_TFLAG_OUT_FEATURE) | |
ca545c1e | 174 | tf_outb(tf->feature, io_ports->feature_addr); |
d309e0bb | 175 | if (task->tf_flags & IDE_TFLAG_OUT_NSECT) |
ca545c1e | 176 | tf_outb(tf->nsect, io_ports->nsect_addr); |
d309e0bb | 177 | if (task->tf_flags & IDE_TFLAG_OUT_LBAL) |
ca545c1e | 178 | tf_outb(tf->lbal, io_ports->lbal_addr); |
d309e0bb | 179 | if (task->tf_flags & IDE_TFLAG_OUT_LBAM) |
ca545c1e | 180 | tf_outb(tf->lbam, io_ports->lbam_addr); |
d309e0bb | 181 | if (task->tf_flags & IDE_TFLAG_OUT_LBAH) |
ca545c1e | 182 | tf_outb(tf->lbah, io_ports->lbah_addr); |
d309e0bb BZ |
183 | |
184 | if (task->tf_flags & IDE_TFLAG_OUT_DEVICE) | |
ca545c1e BZ |
185 | tf_outb((tf->device & HIHI) | drive->select.all, |
186 | io_ports->device_addr); | |
d309e0bb | 187 | } |
374e042c | 188 | EXPORT_SYMBOL_GPL(ide_tf_load); |
d309e0bb | 189 | |
374e042c | 190 | void ide_tf_read(ide_drive_t *drive, ide_task_t *task) |
d309e0bb BZ |
191 | { |
192 | ide_hwif_t *hwif = drive->hwif; | |
193 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
194 | struct ide_taskfile *tf = &task->tf; | |
ca545c1e BZ |
195 | void (*tf_outb)(u8 addr, unsigned long port); |
196 | u8 (*tf_inb)(unsigned long port); | |
197 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; | |
198 | ||
199 | if (mmio) { | |
200 | tf_outb = ide_mm_outb; | |
201 | tf_inb = ide_mm_inb; | |
202 | } else { | |
203 | tf_outb = ide_outb; | |
204 | tf_inb = ide_inb; | |
205 | } | |
d309e0bb BZ |
206 | |
207 | if (task->tf_flags & IDE_TFLAG_IN_DATA) { | |
ca545c1e BZ |
208 | u16 data; |
209 | ||
210 | if (mmio) | |
211 | data = readw((void __iomem *)io_ports->data_addr); | |
212 | else | |
213 | data = inw(io_ports->data_addr); | |
d309e0bb BZ |
214 | |
215 | tf->data = data & 0xff; | |
216 | tf->hob_data = (data >> 8) & 0xff; | |
217 | } | |
218 | ||
219 | /* be sure we're looking at the low order bits */ | |
ff074883 | 220 | tf_outb(ATA_DEVCTL_OBS & ~0x80, io_ports->ctl_addr); |
d309e0bb | 221 | |
92eb4380 BZ |
222 | if (task->tf_flags & IDE_TFLAG_IN_FEATURE) |
223 | tf->feature = tf_inb(io_ports->feature_addr); | |
d309e0bb | 224 | if (task->tf_flags & IDE_TFLAG_IN_NSECT) |
ca545c1e | 225 | tf->nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 226 | if (task->tf_flags & IDE_TFLAG_IN_LBAL) |
ca545c1e | 227 | tf->lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 228 | if (task->tf_flags & IDE_TFLAG_IN_LBAM) |
ca545c1e | 229 | tf->lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 230 | if (task->tf_flags & IDE_TFLAG_IN_LBAH) |
ca545c1e | 231 | tf->lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb | 232 | if (task->tf_flags & IDE_TFLAG_IN_DEVICE) |
ca545c1e | 233 | tf->device = tf_inb(io_ports->device_addr); |
d309e0bb BZ |
234 | |
235 | if (task->tf_flags & IDE_TFLAG_LBA48) { | |
ff074883 | 236 | tf_outb(ATA_DEVCTL_OBS | 0x80, io_ports->ctl_addr); |
d309e0bb BZ |
237 | |
238 | if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE) | |
ca545c1e | 239 | tf->hob_feature = tf_inb(io_ports->feature_addr); |
d309e0bb | 240 | if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT) |
ca545c1e | 241 | tf->hob_nsect = tf_inb(io_ports->nsect_addr); |
d309e0bb | 242 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL) |
ca545c1e | 243 | tf->hob_lbal = tf_inb(io_ports->lbal_addr); |
d309e0bb | 244 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM) |
ca545c1e | 245 | tf->hob_lbam = tf_inb(io_ports->lbam_addr); |
d309e0bb | 246 | if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH) |
ca545c1e | 247 | tf->hob_lbah = tf_inb(io_ports->lbah_addr); |
d309e0bb BZ |
248 | } |
249 | } | |
374e042c | 250 | EXPORT_SYMBOL_GPL(ide_tf_read); |
d309e0bb | 251 | |
1da177e4 LT |
252 | /* |
253 | * Some localbus EIDE interfaces require a special access sequence | |
254 | * when using 32-bit I/O instructions to transfer data. We call this | |
255 | * the "vlb_sync" sequence, which consists of three successive reads | |
256 | * of the sector count register location, with interrupts disabled | |
257 | * to ensure that the reads all happen together. | |
258 | */ | |
22cdd6ce | 259 | static void ata_vlb_sync(unsigned long port) |
1da177e4 | 260 | { |
22cdd6ce BZ |
261 | (void)inb(port); |
262 | (void)inb(port); | |
263 | (void)inb(port); | |
1da177e4 LT |
264 | } |
265 | ||
266 | /* | |
267 | * This is used for most PIO data transfers *from* the IDE interface | |
9567b349 BZ |
268 | * |
269 | * These routines will round up any request for an odd number of bytes, | |
270 | * so if an odd len is specified, be sure that there's at least one | |
271 | * extra byte allocated for the buffer. | |
1da177e4 | 272 | */ |
374e042c BZ |
273 | void ide_input_data(ide_drive_t *drive, struct request *rq, void *buf, |
274 | unsigned int len) | |
1da177e4 | 275 | { |
4c3032d8 BZ |
276 | ide_hwif_t *hwif = drive->hwif; |
277 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 278 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 279 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 280 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 | 281 | |
9567b349 BZ |
282 | len++; |
283 | ||
1da177e4 | 284 | if (io_32bit) { |
16bb69c1 | 285 | unsigned long uninitialized_var(flags); |
23579a2a | 286 | |
22cdd6ce | 287 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 288 | local_irq_save(flags); |
22cdd6ce | 289 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
290 | } |
291 | ||
292 | if (mmio) | |
293 | __ide_mm_insl((void __iomem *)data_addr, buf, len / 4); | |
294 | else | |
295 | insl(data_addr, buf, len / 4); | |
296 | ||
22cdd6ce | 297 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 298 | local_irq_restore(flags); |
9567b349 | 299 | |
16bb69c1 BZ |
300 | if ((len & 3) >= 2) { |
301 | if (mmio) | |
302 | __ide_mm_insw((void __iomem *)data_addr, | |
303 | (u8 *)buf + (len & ~3), 1); | |
304 | else | |
305 | insw(data_addr, (u8 *)buf + (len & ~3), 1); | |
306 | } | |
307 | } else { | |
308 | if (mmio) | |
309 | __ide_mm_insw((void __iomem *)data_addr, buf, len / 2); | |
310 | else | |
311 | insw(data_addr, buf, len / 2); | |
312 | } | |
1da177e4 | 313 | } |
374e042c | 314 | EXPORT_SYMBOL_GPL(ide_input_data); |
1da177e4 LT |
315 | |
316 | /* | |
317 | * This is used for most PIO data transfers *to* the IDE interface | |
318 | */ | |
374e042c BZ |
319 | void ide_output_data(ide_drive_t *drive, struct request *rq, void *buf, |
320 | unsigned int len) | |
1da177e4 | 321 | { |
4c3032d8 BZ |
322 | ide_hwif_t *hwif = drive->hwif; |
323 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
9567b349 | 324 | unsigned long data_addr = io_ports->data_addr; |
4c3032d8 | 325 | u8 io_32bit = drive->io_32bit; |
16bb69c1 | 326 | u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0; |
1da177e4 LT |
327 | |
328 | if (io_32bit) { | |
16bb69c1 | 329 | unsigned long uninitialized_var(flags); |
23579a2a | 330 | |
22cdd6ce | 331 | if ((io_32bit & 2) && !mmio) { |
1da177e4 | 332 | local_irq_save(flags); |
22cdd6ce | 333 | ata_vlb_sync(io_ports->nsect_addr); |
16bb69c1 BZ |
334 | } |
335 | ||
336 | if (mmio) | |
337 | __ide_mm_outsl((void __iomem *)data_addr, buf, len / 4); | |
338 | else | |
339 | outsl(data_addr, buf, len / 4); | |
340 | ||
22cdd6ce | 341 | if ((io_32bit & 2) && !mmio) |
1da177e4 | 342 | local_irq_restore(flags); |
1da177e4 | 343 | |
16bb69c1 BZ |
344 | if ((len & 3) >= 2) { |
345 | if (mmio) | |
346 | __ide_mm_outsw((void __iomem *)data_addr, | |
347 | (u8 *)buf + (len & ~3), 1); | |
348 | else | |
349 | outsw(data_addr, (u8 *)buf + (len & ~3), 1); | |
350 | } | |
351 | } else { | |
352 | if (mmio) | |
353 | __ide_mm_outsw((void __iomem *)data_addr, buf, len / 2); | |
354 | else | |
355 | outsw(data_addr, buf, len / 2); | |
356 | } | |
1da177e4 | 357 | } |
374e042c | 358 | EXPORT_SYMBOL_GPL(ide_output_data); |
1da177e4 | 359 | |
92eb4380 BZ |
360 | u8 ide_read_error(ide_drive_t *drive) |
361 | { | |
362 | ide_task_t task; | |
363 | ||
364 | memset(&task, 0, sizeof(task)); | |
365 | task.tf_flags = IDE_TFLAG_IN_FEATURE; | |
366 | ||
374e042c | 367 | drive->hwif->tp_ops->tf_read(drive, &task); |
92eb4380 BZ |
368 | |
369 | return task.tf.error; | |
370 | } | |
371 | EXPORT_SYMBOL_GPL(ide_read_error); | |
372 | ||
1823649b BZ |
373 | void ide_read_bcount_and_ireason(ide_drive_t *drive, u16 *bcount, u8 *ireason) |
374 | { | |
375 | ide_task_t task; | |
376 | ||
377 | memset(&task, 0, sizeof(task)); | |
378 | task.tf_flags = IDE_TFLAG_IN_LBAH | IDE_TFLAG_IN_LBAM | | |
379 | IDE_TFLAG_IN_NSECT; | |
380 | ||
374e042c | 381 | drive->hwif->tp_ops->tf_read(drive, &task); |
1823649b BZ |
382 | |
383 | *bcount = (task.tf.lbah << 8) | task.tf.lbam; | |
384 | *ireason = task.tf.nsect & 3; | |
385 | } | |
386 | EXPORT_SYMBOL_GPL(ide_read_bcount_and_ireason); | |
387 | ||
374e042c BZ |
388 | const struct ide_tp_ops default_tp_ops = { |
389 | .exec_command = ide_exec_command, | |
390 | .read_status = ide_read_status, | |
391 | .read_altstatus = ide_read_altstatus, | |
392 | .read_sff_dma_status = ide_read_sff_dma_status, | |
393 | ||
394 | .set_irq = ide_set_irq, | |
395 | ||
396 | .tf_load = ide_tf_load, | |
397 | .tf_read = ide_tf_read, | |
398 | ||
399 | .input_data = ide_input_data, | |
400 | .output_data = ide_output_data, | |
401 | }; | |
402 | ||
4dde4492 | 403 | void ide_fix_driveid(u16 *id) |
1da177e4 LT |
404 | { |
405 | #ifndef __LITTLE_ENDIAN | |
406 | # ifdef __BIG_ENDIAN | |
407 | int i; | |
5b90e990 | 408 | |
48fb2688 | 409 | for (i = 0; i < 256; i++) |
5b90e990 | 410 | id[i] = __le16_to_cpu(id[i]); |
1da177e4 LT |
411 | # else |
412 | # error "Please fix <asm/byteorder.h>" | |
413 | # endif | |
414 | #endif | |
415 | } | |
416 | ||
01745112 BZ |
417 | /* |
418 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
419 | * removing leading/trailing blanks and compressing internal blanks. | |
420 | * It is primarily used to tidy up the model name/number fields as | |
aaaade3f | 421 | * returned by the ATA_CMD_ID_ATA[PI] commands. |
01745112 BZ |
422 | */ |
423 | ||
1da177e4 LT |
424 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
425 | { | |
426 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ | |
427 | ||
428 | if (byteswap) { | |
429 | /* convert from big-endian to host byte order */ | |
7fa897b9 HH |
430 | for (p = end ; p != s;) |
431 | be16_to_cpus((u16 *)(p -= 2)); | |
1da177e4 LT |
432 | } |
433 | /* strip leading blanks */ | |
434 | while (s != end && *s == ' ') | |
435 | ++s; | |
436 | /* compress internal blanks and strip trailing blanks */ | |
437 | while (s != end && *s) { | |
438 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
439 | *p++ = *(s-1); | |
440 | } | |
441 | /* wipe out trailing garbage */ | |
442 | while (p != end) | |
443 | *p++ = '\0'; | |
444 | } | |
445 | ||
446 | EXPORT_SYMBOL(ide_fixstring); | |
447 | ||
448 | /* | |
449 | * Needed for PCI irq sharing | |
450 | */ | |
451 | int drive_is_ready (ide_drive_t *drive) | |
452 | { | |
453 | ide_hwif_t *hwif = HWIF(drive); | |
454 | u8 stat = 0; | |
455 | ||
456 | if (drive->waiting_for_dma) | |
5e37bdc0 | 457 | return hwif->dma_ops->dma_test_irq(drive); |
1da177e4 LT |
458 | |
459 | #if 0 | |
460 | /* need to guarantee 400ns since last command was issued */ | |
461 | udelay(1); | |
462 | #endif | |
463 | ||
1da177e4 LT |
464 | /* |
465 | * We do a passive status test under shared PCI interrupts on | |
466 | * cards that truly share the ATA side interrupt, but may also share | |
467 | * an interrupt with another pci card/device. We make no assumptions | |
468 | * about possible isa-pnp and pci-pnp issues yet. | |
469 | */ | |
4c3032d8 | 470 | if (hwif->io_ports.ctl_addr) |
374e042c | 471 | stat = hwif->tp_ops->read_altstatus(hwif); |
1da177e4 | 472 | else |
1da177e4 | 473 | /* Note: this may clear a pending IRQ!! */ |
374e042c | 474 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 475 | |
3a7d2484 | 476 | if (stat & ATA_BUSY) |
1da177e4 LT |
477 | /* drive busy: definitely not interrupting */ |
478 | return 0; | |
479 | ||
480 | /* drive ready: *might* be interrupting */ | |
481 | return 1; | |
482 | } | |
483 | ||
484 | EXPORT_SYMBOL(drive_is_ready); | |
485 | ||
1da177e4 LT |
486 | /* |
487 | * This routine busy-waits for the drive status to be not "busy". | |
488 | * It then checks the status for all of the "good" bits and none | |
489 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 490 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
491 | * |
492 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
493 | * That could be done by busy-waiting for the first jiffy or two, and then | |
494 | * setting a timer to wake up at half second intervals thereafter, | |
495 | * until timeout is achieved, before timing out. | |
496 | */ | |
aedea591 | 497 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 498 | { |
b73c7ee2 | 499 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 500 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 | 501 | unsigned long flags; |
74af21cf BZ |
502 | int i; |
503 | u8 stat; | |
1da177e4 LT |
504 | |
505 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
374e042c | 506 | stat = tp_ops->read_status(hwif); |
c47137a9 | 507 | |
3a7d2484 | 508 | if (stat & ATA_BUSY) { |
1da177e4 LT |
509 | local_irq_set(flags); |
510 | timeout += jiffies; | |
3a7d2484 | 511 | while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
1da177e4 LT |
512 | if (time_after(jiffies, timeout)) { |
513 | /* | |
514 | * One last read after the timeout in case | |
515 | * heavy interrupt load made us not make any | |
516 | * progress during the timeout.. | |
517 | */ | |
374e042c | 518 | stat = tp_ops->read_status(hwif); |
3a7d2484 | 519 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
520 | break; |
521 | ||
522 | local_irq_restore(flags); | |
74af21cf BZ |
523 | *rstat = stat; |
524 | return -EBUSY; | |
1da177e4 LT |
525 | } |
526 | } | |
527 | local_irq_restore(flags); | |
528 | } | |
529 | /* | |
530 | * Allow status to settle, then read it again. | |
531 | * A few rare drives vastly violate the 400ns spec here, | |
532 | * so we'll wait up to 10usec for a "good" status | |
533 | * rather than expensively fail things immediately. | |
534 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
535 | */ | |
536 | for (i = 0; i < 10; i++) { | |
537 | udelay(1); | |
374e042c | 538 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
539 | |
540 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 541 | *rstat = stat; |
1da177e4 | 542 | return 0; |
74af21cf | 543 | } |
1da177e4 | 544 | } |
74af21cf BZ |
545 | *rstat = stat; |
546 | return -EFAULT; | |
547 | } | |
548 | ||
549 | /* | |
550 | * In case of error returns error value after doing "*startstop = ide_error()". | |
551 | * The caller should return the updated value of "startstop" in this case, | |
552 | * "startstop" is unchanged when the function returns 0. | |
553 | */ | |
554 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
555 | { | |
556 | int err; | |
557 | u8 stat; | |
558 | ||
559 | /* bail early if we've exceeded max_failures */ | |
560 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
561 | *startstop = ide_stopped; | |
562 | return 1; | |
563 | } | |
564 | ||
565 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
566 | ||
567 | if (err) { | |
568 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
569 | *startstop = ide_error(drive, s, stat); | |
570 | } | |
571 | ||
572 | return err; | |
1da177e4 LT |
573 | } |
574 | ||
575 | EXPORT_SYMBOL(ide_wait_stat); | |
576 | ||
a5b7e70d BZ |
577 | /** |
578 | * ide_in_drive_list - look for drive in black/white list | |
579 | * @id: drive identifier | |
4dde4492 | 580 | * @table: list to inspect |
a5b7e70d BZ |
581 | * |
582 | * Look for a drive in the blacklist and the whitelist tables | |
583 | * Returns 1 if the drive is found in the table. | |
584 | */ | |
585 | ||
4dde4492 | 586 | int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
a5b7e70d | 587 | { |
4dde4492 BZ |
588 | for ( ; table->id_model; table++) |
589 | if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && | |
590 | (!table->id_firmware || | |
591 | strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) | |
a5b7e70d BZ |
592 | return 1; |
593 | return 0; | |
594 | } | |
595 | ||
b0244a00 BZ |
596 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
597 | ||
a5b7e70d BZ |
598 | /* |
599 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
600 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
601 | * |
602 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
603 | */ |
604 | static const struct drive_list_entry ivb_list[] = { | |
605 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 606 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
607 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
608 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
609 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
3ced5c49 AS |
610 | { "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
611 | { "TSSTcorp CDDVDW SH-S202H" , "SB01" }, | |
a5b7e70d BZ |
612 | { NULL , NULL } |
613 | }; | |
614 | ||
1da177e4 LT |
615 | /* |
616 | * All hosts that use the 80c ribbon must use! | |
617 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
618 | */ | |
619 | u8 eighty_ninty_three (ide_drive_t *drive) | |
620 | { | |
7f8f48af | 621 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 622 | u16 *id = drive->id; |
a5b7e70d | 623 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 624 | |
49521f97 BZ |
625 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
626 | return 1; | |
627 | ||
a5b7e70d BZ |
628 | if (ivb) |
629 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
630 | drive->name); | |
631 | ||
b98f8803 GK |
632 | if (ide_dev_is_sata(id) && !ivb) |
633 | return 1; | |
634 | ||
a5b7e70d | 635 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 636 | goto no_80w; |
1a1276e7 | 637 | |
f68d9320 BZ |
638 | /* |
639 | * FIXME: | |
f367bed0 | 640 | * - change master/slave IDENTIFY order |
a5b7e70d | 641 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
642 | * (unless the slave device is pre-ATA3) |
643 | */ | |
4dde4492 BZ |
644 | if ((id[ATA_ID_HW_CONFIG] & 0x4000) || |
645 | (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000))) | |
7f8f48af BZ |
646 | return 1; |
647 | ||
648 | no_80w: | |
649 | if (drive->udma33_warned == 1) | |
650 | return 0; | |
651 | ||
652 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
653 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
654 | drive->name, |
655 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af BZ |
656 | |
657 | drive->udma33_warned = 1; | |
658 | ||
659 | return 0; | |
1da177e4 LT |
660 | } |
661 | ||
8a455134 | 662 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 663 | { |
8a455134 | 664 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 665 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 666 | u16 *id; |
8a455134 | 667 | unsigned long timeout, flags; |
c47137a9 | 668 | u8 stat; |
1da177e4 | 669 | |
1da177e4 LT |
670 | /* |
671 | * Re-read drive->id for possible DMA mode | |
672 | * change (copied from ide-probe.c) | |
673 | */ | |
1da177e4 LT |
674 | |
675 | SELECT_MASK(drive, 1); | |
374e042c | 676 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 677 | msleep(50); |
aaaade3f | 678 | tp_ops->exec_command(hwif, ATA_CMD_ID_ATA); |
1da177e4 LT |
679 | timeout = jiffies + WAIT_WORSTCASE; |
680 | do { | |
681 | if (time_after(jiffies, timeout)) { | |
682 | SELECT_MASK(drive, 0); | |
683 | return 0; /* drive timed-out */ | |
684 | } | |
c47137a9 | 685 | |
1da177e4 | 686 | msleep(50); /* give drive a breather */ |
374e042c | 687 | stat = tp_ops->read_altstatus(hwif); |
3a7d2484 | 688 | } while (stat & ATA_BUSY); |
c47137a9 | 689 | |
3a7d2484 | 690 | msleep(50); /* wait for IRQ and ATA_DRQ */ |
374e042c | 691 | stat = tp_ops->read_status(hwif); |
c47137a9 | 692 | |
3a7d2484 | 693 | if (!OK_STAT(stat, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
694 | SELECT_MASK(drive, 0); |
695 | printk("%s: CHECK for good STATUS\n", drive->name); | |
696 | return 0; | |
697 | } | |
698 | local_irq_save(flags); | |
699 | SELECT_MASK(drive, 0); | |
700 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
701 | if (!id) { | |
702 | local_irq_restore(flags); | |
703 | return 0; | |
704 | } | |
374e042c BZ |
705 | tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
706 | (void)tp_ops->read_status(hwif); /* clear drive IRQ */ | |
1da177e4 LT |
707 | local_irq_enable(); |
708 | local_irq_restore(flags); | |
709 | ide_fix_driveid(id); | |
4dde4492 BZ |
710 | |
711 | drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; | |
712 | drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; | |
713 | drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; | |
714 | /* anything more ? */ | |
715 | ||
716 | kfree(id); | |
717 | ||
718 | if (drive->using_dma && ide_id_dma_bug(drive)) | |
719 | ide_dma_off(drive); | |
1da177e4 LT |
720 | |
721 | return 1; | |
1da177e4 LT |
722 | } |
723 | ||
74af21cf | 724 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 725 | { |
74af21cf | 726 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 727 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
4dde4492 | 728 | u16 *id = drive->id, i; |
89613e66 | 729 | int error = 0; |
1da177e4 | 730 | u8 stat; |
59be2c80 | 731 | ide_task_t task; |
1da177e4 | 732 | |
1da177e4 | 733 | #ifdef CONFIG_BLK_DEV_IDEDMA |
5e37bdc0 BZ |
734 | if (hwif->dma_ops) /* check if host supports DMA */ |
735 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
736 | #endif |
737 | ||
89613e66 | 738 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
48fb2688 | 739 | if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
89613e66 SS |
740 | goto skip; |
741 | ||
1da177e4 LT |
742 | /* |
743 | * Don't use ide_wait_cmd here - it will | |
744 | * attempt to set_geometry and recalibrate, | |
745 | * but for some reason these don't work at | |
746 | * this point (lost interrupt). | |
747 | */ | |
748 | /* | |
749 | * Select the drive, and issue the SETFEATURES command | |
750 | */ | |
751 | disable_irq_nosync(hwif->irq); | |
752 | ||
753 | /* | |
754 | * FIXME: we race against the running IRQ here if | |
755 | * this is called from non IRQ context. If we use | |
756 | * disable_irq() we hang on the error path. Work | |
757 | * is needed. | |
758 | */ | |
759 | ||
760 | udelay(1); | |
761 | SELECT_DRIVE(drive); | |
762 | SELECT_MASK(drive, 0); | |
763 | udelay(1); | |
374e042c | 764 | tp_ops->set_irq(hwif, 0); |
59be2c80 BZ |
765 | |
766 | memset(&task, 0, sizeof(task)); | |
767 | task.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT; | |
768 | task.tf.feature = SETFEATURES_XFER; | |
769 | task.tf.nsect = speed; | |
770 | ||
374e042c | 771 | tp_ops->tf_load(drive, &task); |
59be2c80 | 772 | |
aaaade3f | 773 | tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
59be2c80 | 774 | |
81ca6919 | 775 | if (drive->quirk_list == 2) |
374e042c | 776 | tp_ops->set_irq(hwif, 1); |
1da177e4 | 777 | |
74af21cf | 778 | error = __ide_wait_stat(drive, drive->ready_stat, |
3a7d2484 | 779 | ATA_BUSY | ATA_DRQ | ATA_ERR, |
74af21cf | 780 | WAIT_CMD, &stat); |
1da177e4 LT |
781 | |
782 | SELECT_MASK(drive, 0); | |
783 | ||
784 | enable_irq(hwif->irq); | |
785 | ||
786 | if (error) { | |
787 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
788 | return error; | |
789 | } | |
790 | ||
4dde4492 BZ |
791 | id[ATA_ID_UDMA_MODES] &= ~0xFF00; |
792 | id[ATA_ID_MWDMA_MODES] &= ~0x0F00; | |
793 | id[ATA_ID_SWDMA_MODES] &= ~0x0F00; | |
1da177e4 | 794 | |
89613e66 | 795 | skip: |
1da177e4 | 796 | #ifdef CONFIG_BLK_DEV_IDEDMA |
ba4b2e60 | 797 | if (speed >= XFER_SW_DMA_0 && drive->using_dma) |
5e37bdc0 BZ |
798 | hwif->dma_ops->dma_host_set(drive, 1); |
799 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 800 | ide_dma_off_quietly(drive); |
1da177e4 LT |
801 | #endif |
802 | ||
4dde4492 BZ |
803 | if (speed >= XFER_UDMA_0) { |
804 | i = 1 << (speed - XFER_UDMA_0); | |
805 | id[ATA_ID_UDMA_MODES] |= (i << 8 | i); | |
806 | } else if (speed >= XFER_MW_DMA_0) { | |
807 | i = 1 << (speed - XFER_MW_DMA_0); | |
808 | id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); | |
809 | } else if (speed >= XFER_SW_DMA_0) { | |
810 | i = 1 << (speed - XFER_SW_DMA_0); | |
811 | id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); | |
1da177e4 | 812 | } |
4dde4492 | 813 | |
1da177e4 LT |
814 | if (!drive->init_speed) |
815 | drive->init_speed = speed; | |
816 | drive->current_speed = speed; | |
817 | return error; | |
818 | } | |
819 | ||
1da177e4 LT |
820 | /* |
821 | * This should get invoked any time we exit the driver to | |
822 | * wait for an interrupt response from a drive. handler() points | |
823 | * at the appropriate code to handle the next interrupt, and a | |
824 | * timer is started to prevent us from waiting forever in case | |
825 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
826 | * | |
827 | * See also ide_execute_command | |
828 | */ | |
829 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
830 | unsigned int timeout, ide_expiry_t *expiry) | |
831 | { | |
832 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
833 | ||
d30a426d | 834 | BUG_ON(hwgroup->handler); |
1da177e4 LT |
835 | hwgroup->handler = handler; |
836 | hwgroup->expiry = expiry; | |
837 | hwgroup->timer.expires = jiffies + timeout; | |
d30a426d | 838 | hwgroup->req_gen_timer = hwgroup->req_gen; |
1da177e4 LT |
839 | add_timer(&hwgroup->timer); |
840 | } | |
841 | ||
842 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
843 | unsigned int timeout, ide_expiry_t *expiry) | |
844 | { | |
845 | unsigned long flags; | |
846 | spin_lock_irqsave(&ide_lock, flags); | |
847 | __ide_set_handler(drive, handler, timeout, expiry); | |
848 | spin_unlock_irqrestore(&ide_lock, flags); | |
849 | } | |
850 | ||
851 | EXPORT_SYMBOL(ide_set_handler); | |
852 | ||
853 | /** | |
854 | * ide_execute_command - execute an IDE command | |
855 | * @drive: IDE drive to issue the command against | |
856 | * @command: command byte to write | |
857 | * @handler: handler for next phase | |
858 | * @timeout: timeout for command | |
859 | * @expiry: handler to run on timeout | |
860 | * | |
861 | * Helper function to issue an IDE command. This handles the | |
862 | * atomicity requirements, command timing and ensures that the | |
863 | * handler and IRQ setup do not race. All IDE command kick off | |
864 | * should go via this function or do equivalent locking. | |
865 | */ | |
cd2a2d96 BZ |
866 | |
867 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
868 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 LT |
869 | { |
870 | unsigned long flags; | |
1da177e4 | 871 | ide_hwif_t *hwif = HWIF(drive); |
629f944b | 872 | |
1da177e4 | 873 | spin_lock_irqsave(&ide_lock, flags); |
629f944b | 874 | __ide_set_handler(drive, handler, timeout, expiry); |
374e042c | 875 | hwif->tp_ops->exec_command(hwif, cmd); |
629f944b BZ |
876 | /* |
877 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
878 | * serviced before that. | |
879 | * | |
880 | * FIXME: we could skip this delay with care on non shared devices | |
881 | */ | |
1da177e4 LT |
882 | ndelay(400); |
883 | spin_unlock_irqrestore(&ide_lock, flags); | |
884 | } | |
1da177e4 LT |
885 | EXPORT_SYMBOL(ide_execute_command); |
886 | ||
1fc14258 BZ |
887 | void ide_execute_pkt_cmd(ide_drive_t *drive) |
888 | { | |
889 | ide_hwif_t *hwif = drive->hwif; | |
890 | unsigned long flags; | |
891 | ||
892 | spin_lock_irqsave(&ide_lock, flags); | |
aaaade3f | 893 | hwif->tp_ops->exec_command(hwif, ATA_CMD_PACKET); |
1fc14258 BZ |
894 | ndelay(400); |
895 | spin_unlock_irqrestore(&ide_lock, flags); | |
896 | } | |
897 | EXPORT_SYMBOL_GPL(ide_execute_pkt_cmd); | |
1da177e4 | 898 | |
64a8f00f | 899 | static inline void ide_complete_drive_reset(ide_drive_t *drive, int err) |
79e36a9f EO |
900 | { |
901 | struct request *rq = drive->hwif->hwgroup->rq; | |
902 | ||
903 | if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) | |
64a8f00f | 904 | ide_end_request(drive, err ? err : 1, 0); |
79e36a9f EO |
905 | } |
906 | ||
1da177e4 LT |
907 | /* needed below */ |
908 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
909 | ||
910 | /* | |
911 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
912 | * during an atapi drive reset operation. If the drive has not yet responded, | |
913 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
914 | * for another 50ms. | |
915 | */ | |
916 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
917 | { | |
b73c7ee2 BZ |
918 | ide_hwif_t *hwif = drive->hwif; |
919 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
1da177e4 LT |
920 | u8 stat; |
921 | ||
922 | SELECT_DRIVE(drive); | |
923 | udelay (10); | |
374e042c | 924 | stat = hwif->tp_ops->read_status(hwif); |
1da177e4 | 925 | |
3a7d2484 | 926 | if (OK_STAT(stat, 0, ATA_BUSY)) |
1da177e4 | 927 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 928 | else { |
1da177e4 | 929 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
930 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
931 | /* continue polling */ | |
932 | return ide_started; | |
933 | } | |
934 | /* end of polling */ | |
935 | hwgroup->polling = 0; | |
936 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
937 | drive->name, stat); | |
938 | /* do it the old fashioned way */ | |
939 | return do_reset1(drive, 1); | |
940 | } | |
941 | /* done polling */ | |
942 | hwgroup->polling = 0; | |
64a8f00f | 943 | ide_complete_drive_reset(drive, 0); |
1da177e4 LT |
944 | return ide_stopped; |
945 | } | |
946 | ||
947 | /* | |
948 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
949 | * during an ide reset operation. If the drives have not yet responded, | |
950 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
951 | * for another 50ms. | |
952 | */ | |
953 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
954 | { | |
955 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
956 | ide_hwif_t *hwif = HWIF(drive); | |
ac95beed | 957 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 | 958 | u8 tmp; |
64a8f00f | 959 | int err = 0; |
1da177e4 | 960 | |
ac95beed | 961 | if (port_ops && port_ops->reset_poll) { |
64a8f00f EO |
962 | err = port_ops->reset_poll(drive); |
963 | if (err) { | |
1da177e4 LT |
964 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
965 | hwif->name, drive->name); | |
79e36a9f | 966 | goto out; |
1da177e4 LT |
967 | } |
968 | } | |
969 | ||
374e042c | 970 | tmp = hwif->tp_ops->read_status(hwif); |
c47137a9 | 971 | |
3a7d2484 | 972 | if (!OK_STAT(tmp, 0, ATA_BUSY)) { |
1da177e4 | 973 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
974 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
975 | /* continue polling */ | |
976 | return ide_started; | |
977 | } | |
978 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
979 | drive->failures++; | |
64a8f00f | 980 | err = -EIO; |
1da177e4 LT |
981 | } else { |
982 | printk("%s: reset: ", hwif->name); | |
64a57fe4 BZ |
983 | tmp = ide_read_error(drive); |
984 | ||
985 | if (tmp == 1) { | |
1da177e4 LT |
986 | printk("success\n"); |
987 | drive->failures = 0; | |
988 | } else { | |
989 | drive->failures++; | |
990 | printk("master: "); | |
991 | switch (tmp & 0x7f) { | |
992 | case 1: printk("passed"); | |
993 | break; | |
994 | case 2: printk("formatter device error"); | |
995 | break; | |
996 | case 3: printk("sector buffer error"); | |
997 | break; | |
998 | case 4: printk("ECC circuitry error"); | |
999 | break; | |
1000 | case 5: printk("controlling MPU error"); | |
1001 | break; | |
1002 | default:printk("error (0x%02x?)", tmp); | |
1003 | } | |
1004 | if (tmp & 0x80) | |
1005 | printk("; slave: failed"); | |
1006 | printk("\n"); | |
64a8f00f | 1007 | err = -EIO; |
1da177e4 LT |
1008 | } |
1009 | } | |
79e36a9f | 1010 | out: |
64a8f00f EO |
1011 | hwgroup->polling = 0; /* done polling */ |
1012 | ide_complete_drive_reset(drive, err); | |
1da177e4 LT |
1013 | return ide_stopped; |
1014 | } | |
1015 | ||
1da177e4 LT |
1016 | static void ide_disk_pre_reset(ide_drive_t *drive) |
1017 | { | |
4dde4492 | 1018 | int legacy = (drive->id[ATA_ID_CFS_ENABLE_2] & 0x0400) ? 0 : 1; |
1da177e4 LT |
1019 | |
1020 | drive->special.all = 0; | |
1021 | drive->special.b.set_geometry = legacy; | |
1022 | drive->special.b.recalibrate = legacy; | |
4ee06b7e | 1023 | drive->mult_count = 0; |
1da177e4 LT |
1024 | if (!drive->keep_settings && !drive->using_dma) |
1025 | drive->mult_req = 0; | |
1026 | if (drive->mult_req != drive->mult_count) | |
1027 | drive->special.b.set_multmode = 1; | |
1028 | } | |
1029 | ||
1030 | static void pre_reset(ide_drive_t *drive) | |
1031 | { | |
ac95beed BZ |
1032 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
1033 | ||
1da177e4 LT |
1034 | if (drive->media == ide_disk) |
1035 | ide_disk_pre_reset(drive); | |
1036 | else | |
1037 | drive->post_reset = 1; | |
1038 | ||
99ffbe0e BZ |
1039 | if (drive->using_dma) { |
1040 | if (drive->crc_count) | |
578cfa0d | 1041 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
1042 | else |
1043 | ide_dma_off(drive); | |
1044 | } | |
1045 | ||
1046 | if (!drive->keep_settings) { | |
1047 | if (!drive->using_dma) { | |
1da177e4 LT |
1048 | drive->unmask = 0; |
1049 | drive->io_32bit = 0; | |
1050 | } | |
1051 | return; | |
1052 | } | |
1da177e4 | 1053 | |
ac95beed BZ |
1054 | if (port_ops && port_ops->pre_reset) |
1055 | port_ops->pre_reset(drive); | |
1da177e4 | 1056 | |
513daadd SS |
1057 | if (drive->current_speed != 0xff) |
1058 | drive->desired_speed = drive->current_speed; | |
1059 | drive->current_speed = 0xff; | |
1da177e4 LT |
1060 | } |
1061 | ||
1062 | /* | |
1063 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1064 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1065 | * the same interface, so it can really be thought of as resetting the | |
1066 | * interface rather than resetting the drive. | |
1067 | * | |
1068 | * ATAPI devices have their own reset mechanism which allows them to be | |
1069 | * individually reset without clobbering other devices on the same interface. | |
1070 | * | |
1071 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1072 | * us know when the reset operation has finished, so we must poll for this. | |
1073 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1074 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1075 | * we set a timer to poll at 50ms intervals. | |
1076 | */ | |
1077 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1078 | { | |
1079 | unsigned int unit; | |
1080 | unsigned long flags; | |
1081 | ide_hwif_t *hwif; | |
1082 | ide_hwgroup_t *hwgroup; | |
4c3032d8 | 1083 | struct ide_io_ports *io_ports; |
374e042c | 1084 | const struct ide_tp_ops *tp_ops; |
ac95beed | 1085 | const struct ide_port_ops *port_ops; |
23579a2a | 1086 | |
1da177e4 LT |
1087 | spin_lock_irqsave(&ide_lock, flags); |
1088 | hwif = HWIF(drive); | |
1089 | hwgroup = HWGROUP(drive); | |
1090 | ||
4c3032d8 BZ |
1091 | io_ports = &hwif->io_ports; |
1092 | ||
374e042c BZ |
1093 | tp_ops = hwif->tp_ops; |
1094 | ||
1da177e4 | 1095 | /* We must not reset with running handlers */ |
125e1874 | 1096 | BUG_ON(hwgroup->handler != NULL); |
1da177e4 LT |
1097 | |
1098 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1099 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
1100 | pre_reset(drive); | |
1101 | SELECT_DRIVE(drive); | |
1102 | udelay (20); | |
aaaade3f | 1103 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
68ad9910 | 1104 | ndelay(400); |
1da177e4 LT |
1105 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1106 | hwgroup->polling = 1; | |
1107 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1108 | spin_unlock_irqrestore(&ide_lock, flags); | |
1109 | return ide_started; | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * First, reset any device state data we were maintaining | |
1114 | * for any of the drives on this interface. | |
1115 | */ | |
1116 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1117 | pre_reset(&hwif->drives[unit]); | |
1118 | ||
4c3032d8 | 1119 | if (io_ports->ctl_addr == 0) { |
1da177e4 | 1120 | spin_unlock_irqrestore(&ide_lock, flags); |
64a8f00f | 1121 | ide_complete_drive_reset(drive, -ENXIO); |
1da177e4 LT |
1122 | return ide_stopped; |
1123 | } | |
1124 | ||
1125 | /* | |
1126 | * Note that we also set nIEN while resetting the device, | |
1127 | * to mask unwanted interrupts from the interface during the reset. | |
1128 | * However, due to the design of PC hardware, this will cause an | |
1129 | * immediate interrupt due to the edge transition it produces. | |
1130 | * This single interrupt gives us a "fast poll" for drives that | |
1131 | * recover from reset very quickly, saving us the first 50ms wait time. | |
6e6afb3b BZ |
1132 | * |
1133 | * TODO: add ->softreset method and stop abusing ->set_irq | |
1da177e4 LT |
1134 | */ |
1135 | /* set SRST and nIEN */ | |
374e042c | 1136 | tp_ops->set_irq(hwif, 4); |
1da177e4 LT |
1137 | /* more than enough time */ |
1138 | udelay(10); | |
6e6afb3b | 1139 | /* clear SRST, leave nIEN (unless device is on the quirk list) */ |
374e042c | 1140 | tp_ops->set_irq(hwif, drive->quirk_list == 2); |
1da177e4 LT |
1141 | /* more than enough time */ |
1142 | udelay(10); | |
1143 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1144 | hwgroup->polling = 1; | |
1145 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1146 | ||
1147 | /* | |
1148 | * Some weird controller like resetting themselves to a strange | |
1149 | * state when the disks are reset this way. At least, the Winbond | |
1150 | * 553 documentation says that | |
1151 | */ | |
ac95beed BZ |
1152 | port_ops = hwif->port_ops; |
1153 | if (port_ops && port_ops->resetproc) | |
1154 | port_ops->resetproc(drive); | |
1da177e4 LT |
1155 | |
1156 | spin_unlock_irqrestore(&ide_lock, flags); | |
1157 | return ide_started; | |
1158 | } | |
1159 | ||
1160 | /* | |
1161 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1162 | */ | |
1163 | ||
1164 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1165 | { | |
1166 | return do_reset1(drive, 0); | |
1167 | } | |
1168 | ||
1169 | EXPORT_SYMBOL(ide_do_reset); | |
1170 | ||
1171 | /* | |
1172 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1173 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1174 | */ |
1175 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1176 | { | |
1177 | u8 stat = 0; | |
1178 | ||
1179 | while(timeout--) { | |
1180 | /* | |
1181 | * Turn this into a schedule() sleep once I'm sure | |
1182 | * about locking issues (2.5 work ?). | |
1183 | */ | |
1184 | mdelay(1); | |
374e042c | 1185 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 1186 | if ((stat & ATA_BUSY) == 0) |
1da177e4 LT |
1187 | return 0; |
1188 | /* | |
1189 | * Assume a value of 0xff means nothing is connected to | |
1190 | * the interface and it doesn't implement the pull-down | |
1191 | * resistor on D7. | |
1192 | */ | |
1193 | if (stat == 0xff) | |
1194 | return -ENODEV; | |
6842f8c8 | 1195 | touch_softlockup_watchdog(); |
1e86240f | 1196 | touch_nmi_watchdog(); |
1da177e4 LT |
1197 | } |
1198 | return -EBUSY; | |
1199 | } | |
1200 | ||
1201 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1202 |