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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 | ||
40 | static u16 ide_inw (unsigned long port) | |
41 | { | |
42 | return (u16) inw(port); | |
43 | } | |
44 | ||
45 | static void ide_insw (unsigned long port, void *addr, u32 count) | |
46 | { | |
47 | insw(port, addr, count); | |
48 | } | |
49 | ||
1da177e4 LT |
50 | static void ide_insl (unsigned long port, void *addr, u32 count) |
51 | { | |
52 | insl(port, addr, count); | |
53 | } | |
54 | ||
55 | static void ide_outb (u8 val, unsigned long port) | |
56 | { | |
57 | outb(val, port); | |
58 | } | |
59 | ||
60 | static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port) | |
61 | { | |
62 | outb(addr, port); | |
63 | } | |
64 | ||
65 | static void ide_outw (u16 val, unsigned long port) | |
66 | { | |
67 | outw(val, port); | |
68 | } | |
69 | ||
70 | static void ide_outsw (unsigned long port, void *addr, u32 count) | |
71 | { | |
72 | outsw(port, addr, count); | |
73 | } | |
74 | ||
1da177e4 LT |
75 | static void ide_outsl (unsigned long port, void *addr, u32 count) |
76 | { | |
77 | outsl(port, addr, count); | |
78 | } | |
79 | ||
80 | void default_hwif_iops (ide_hwif_t *hwif) | |
81 | { | |
82 | hwif->OUTB = ide_outb; | |
83 | hwif->OUTBSYNC = ide_outbsync; | |
84 | hwif->OUTW = ide_outw; | |
1da177e4 LT |
85 | hwif->OUTSW = ide_outsw; |
86 | hwif->OUTSL = ide_outsl; | |
87 | hwif->INB = ide_inb; | |
88 | hwif->INW = ide_inw; | |
1da177e4 LT |
89 | hwif->INSW = ide_insw; |
90 | hwif->INSL = ide_insl; | |
91 | } | |
92 | ||
1da177e4 LT |
93 | /* |
94 | * MMIO operations, typically used for SATA controllers | |
95 | */ | |
96 | ||
97 | static u8 ide_mm_inb (unsigned long port) | |
98 | { | |
99 | return (u8) readb((void __iomem *) port); | |
100 | } | |
101 | ||
102 | static u16 ide_mm_inw (unsigned long port) | |
103 | { | |
104 | return (u16) readw((void __iomem *) port); | |
105 | } | |
106 | ||
107 | static void ide_mm_insw (unsigned long port, void *addr, u32 count) | |
108 | { | |
109 | __ide_mm_insw((void __iomem *) port, addr, count); | |
110 | } | |
111 | ||
1da177e4 LT |
112 | static void ide_mm_insl (unsigned long port, void *addr, u32 count) |
113 | { | |
114 | __ide_mm_insl((void __iomem *) port, addr, count); | |
115 | } | |
116 | ||
117 | static void ide_mm_outb (u8 value, unsigned long port) | |
118 | { | |
119 | writeb(value, (void __iomem *) port); | |
120 | } | |
121 | ||
122 | static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port) | |
123 | { | |
124 | writeb(value, (void __iomem *) port); | |
125 | } | |
126 | ||
127 | static void ide_mm_outw (u16 value, unsigned long port) | |
128 | { | |
129 | writew(value, (void __iomem *) port); | |
130 | } | |
131 | ||
132 | static void ide_mm_outsw (unsigned long port, void *addr, u32 count) | |
133 | { | |
134 | __ide_mm_outsw((void __iomem *) port, addr, count); | |
135 | } | |
136 | ||
1da177e4 LT |
137 | static void ide_mm_outsl (unsigned long port, void *addr, u32 count) |
138 | { | |
139 | __ide_mm_outsl((void __iomem *) port, addr, count); | |
140 | } | |
141 | ||
142 | void default_hwif_mmiops (ide_hwif_t *hwif) | |
143 | { | |
144 | hwif->OUTB = ide_mm_outb; | |
145 | /* Most systems will need to override OUTBSYNC, alas however | |
146 | this one is controller specific! */ | |
147 | hwif->OUTBSYNC = ide_mm_outbsync; | |
148 | hwif->OUTW = ide_mm_outw; | |
1da177e4 LT |
149 | hwif->OUTSW = ide_mm_outsw; |
150 | hwif->OUTSL = ide_mm_outsl; | |
151 | hwif->INB = ide_mm_inb; | |
152 | hwif->INW = ide_mm_inw; | |
1da177e4 LT |
153 | hwif->INSW = ide_mm_insw; |
154 | hwif->INSL = ide_mm_insl; | |
155 | } | |
156 | ||
157 | EXPORT_SYMBOL(default_hwif_mmiops); | |
158 | ||
1da177e4 LT |
159 | void SELECT_DRIVE (ide_drive_t *drive) |
160 | { | |
23579a2a BZ |
161 | ide_hwif_t *hwif = drive->hwif; |
162 | ||
163 | if (hwif->selectproc) | |
164 | hwif->selectproc(drive); | |
165 | ||
166 | hwif->OUTB(drive->select.all, hwif->io_ports[IDE_SELECT_OFFSET]); | |
1da177e4 LT |
167 | } |
168 | ||
1da177e4 LT |
169 | void SELECT_MASK (ide_drive_t *drive, int mask) |
170 | { | |
171 | if (HWIF(drive)->maskproc) | |
172 | HWIF(drive)->maskproc(drive, mask); | |
173 | } | |
174 | ||
1da177e4 LT |
175 | /* |
176 | * Some localbus EIDE interfaces require a special access sequence | |
177 | * when using 32-bit I/O instructions to transfer data. We call this | |
178 | * the "vlb_sync" sequence, which consists of three successive reads | |
179 | * of the sector count register location, with interrupts disabled | |
180 | * to ensure that the reads all happen together. | |
181 | */ | |
182 | static void ata_vlb_sync(ide_drive_t *drive, unsigned long port) | |
183 | { | |
184 | (void) HWIF(drive)->INB(port); | |
185 | (void) HWIF(drive)->INB(port); | |
186 | (void) HWIF(drive)->INB(port); | |
187 | } | |
188 | ||
189 | /* | |
190 | * This is used for most PIO data transfers *from* the IDE interface | |
191 | */ | |
192 | static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
193 | { | |
194 | ide_hwif_t *hwif = HWIF(drive); | |
195 | u8 io_32bit = drive->io_32bit; | |
196 | ||
197 | if (io_32bit) { | |
198 | if (io_32bit & 2) { | |
199 | unsigned long flags; | |
23579a2a | 200 | |
1da177e4 | 201 | local_irq_save(flags); |
23579a2a BZ |
202 | ata_vlb_sync(drive, hwif->io_ports[IDE_NSECTOR_OFFSET]); |
203 | hwif->INSL(hwif->io_ports[IDE_DATA_OFFSET], buffer, | |
204 | wcount); | |
1da177e4 LT |
205 | local_irq_restore(flags); |
206 | } else | |
23579a2a BZ |
207 | hwif->INSL(hwif->io_ports[IDE_DATA_OFFSET], buffer, |
208 | wcount); | |
209 | } else | |
210 | hwif->INSW(hwif->io_ports[IDE_DATA_OFFSET], buffer, | |
211 | wcount << 1); | |
1da177e4 LT |
212 | } |
213 | ||
214 | /* | |
215 | * This is used for most PIO data transfers *to* the IDE interface | |
216 | */ | |
217 | static void ata_output_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
218 | { | |
219 | ide_hwif_t *hwif = HWIF(drive); | |
220 | u8 io_32bit = drive->io_32bit; | |
221 | ||
222 | if (io_32bit) { | |
223 | if (io_32bit & 2) { | |
224 | unsigned long flags; | |
23579a2a | 225 | |
1da177e4 | 226 | local_irq_save(flags); |
23579a2a BZ |
227 | ata_vlb_sync(drive, hwif->io_ports[IDE_NSECTOR_OFFSET]); |
228 | hwif->OUTSL(hwif->io_ports[IDE_DATA_OFFSET], buffer, | |
229 | wcount); | |
1da177e4 LT |
230 | local_irq_restore(flags); |
231 | } else | |
23579a2a BZ |
232 | hwif->OUTSL(hwif->io_ports[IDE_DATA_OFFSET], buffer, |
233 | wcount); | |
234 | } else | |
235 | hwif->OUTSW(hwif->io_ports[IDE_DATA_OFFSET], buffer, | |
236 | wcount << 1); | |
1da177e4 LT |
237 | } |
238 | ||
239 | /* | |
240 | * The following routines are mainly used by the ATAPI drivers. | |
241 | * | |
242 | * These routines will round up any request for an odd number of bytes, | |
243 | * so if an odd bytecount is specified, be sure that there's at least one | |
244 | * extra byte allocated for the buffer. | |
245 | */ | |
246 | ||
247 | static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) | |
248 | { | |
249 | ide_hwif_t *hwif = HWIF(drive); | |
250 | ||
251 | ++bytecount; | |
252 | #if defined(CONFIG_ATARI) || defined(CONFIG_Q40) | |
253 | if (MACH_IS_ATARI || MACH_IS_Q40) { | |
254 | /* Atari has a byte-swapped IDE interface */ | |
23579a2a BZ |
255 | insw_swapw(hwif->io_ports[IDE_DATA_OFFSET], buffer, |
256 | bytecount / 2); | |
1da177e4 LT |
257 | return; |
258 | } | |
259 | #endif /* CONFIG_ATARI || CONFIG_Q40 */ | |
260 | hwif->ata_input_data(drive, buffer, bytecount / 4); | |
261 | if ((bytecount & 0x03) >= 2) | |
23579a2a BZ |
262 | hwif->INSW(hwif->io_ports[IDE_DATA_OFFSET], |
263 | (u8 *)buffer + (bytecount & ~0x03), 1); | |
1da177e4 LT |
264 | } |
265 | ||
266 | static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) | |
267 | { | |
268 | ide_hwif_t *hwif = HWIF(drive); | |
269 | ||
270 | ++bytecount; | |
271 | #if defined(CONFIG_ATARI) || defined(CONFIG_Q40) | |
272 | if (MACH_IS_ATARI || MACH_IS_Q40) { | |
273 | /* Atari has a byte-swapped IDE interface */ | |
23579a2a BZ |
274 | outsw_swapw(hwif->io_ports[IDE_DATA_OFFSET], buffer, |
275 | bytecount / 2); | |
1da177e4 LT |
276 | return; |
277 | } | |
278 | #endif /* CONFIG_ATARI || CONFIG_Q40 */ | |
279 | hwif->ata_output_data(drive, buffer, bytecount / 4); | |
280 | if ((bytecount & 0x03) >= 2) | |
23579a2a BZ |
281 | hwif->OUTSW(hwif->io_ports[IDE_DATA_OFFSET], |
282 | (u8 *)buffer + (bytecount & ~0x03), 1); | |
1da177e4 LT |
283 | } |
284 | ||
285 | void default_hwif_transport(ide_hwif_t *hwif) | |
286 | { | |
287 | hwif->ata_input_data = ata_input_data; | |
288 | hwif->ata_output_data = ata_output_data; | |
289 | hwif->atapi_input_bytes = atapi_input_bytes; | |
290 | hwif->atapi_output_bytes = atapi_output_bytes; | |
291 | } | |
292 | ||
1da177e4 LT |
293 | void ide_fix_driveid (struct hd_driveid *id) |
294 | { | |
295 | #ifndef __LITTLE_ENDIAN | |
296 | # ifdef __BIG_ENDIAN | |
297 | int i; | |
298 | u16 *stringcast; | |
299 | ||
300 | id->config = __le16_to_cpu(id->config); | |
301 | id->cyls = __le16_to_cpu(id->cyls); | |
302 | id->reserved2 = __le16_to_cpu(id->reserved2); | |
303 | id->heads = __le16_to_cpu(id->heads); | |
304 | id->track_bytes = __le16_to_cpu(id->track_bytes); | |
305 | id->sector_bytes = __le16_to_cpu(id->sector_bytes); | |
306 | id->sectors = __le16_to_cpu(id->sectors); | |
307 | id->vendor0 = __le16_to_cpu(id->vendor0); | |
308 | id->vendor1 = __le16_to_cpu(id->vendor1); | |
309 | id->vendor2 = __le16_to_cpu(id->vendor2); | |
310 | stringcast = (u16 *)&id->serial_no[0]; | |
311 | for (i = 0; i < (20/2); i++) | |
312 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
313 | id->buf_type = __le16_to_cpu(id->buf_type); | |
314 | id->buf_size = __le16_to_cpu(id->buf_size); | |
315 | id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); | |
316 | stringcast = (u16 *)&id->fw_rev[0]; | |
317 | for (i = 0; i < (8/2); i++) | |
318 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
319 | stringcast = (u16 *)&id->model[0]; | |
320 | for (i = 0; i < (40/2); i++) | |
321 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
322 | id->dword_io = __le16_to_cpu(id->dword_io); | |
323 | id->reserved50 = __le16_to_cpu(id->reserved50); | |
324 | id->field_valid = __le16_to_cpu(id->field_valid); | |
325 | id->cur_cyls = __le16_to_cpu(id->cur_cyls); | |
326 | id->cur_heads = __le16_to_cpu(id->cur_heads); | |
327 | id->cur_sectors = __le16_to_cpu(id->cur_sectors); | |
328 | id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); | |
329 | id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); | |
330 | id->lba_capacity = __le32_to_cpu(id->lba_capacity); | |
331 | id->dma_1word = __le16_to_cpu(id->dma_1word); | |
332 | id->dma_mword = __le16_to_cpu(id->dma_mword); | |
333 | id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); | |
334 | id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); | |
335 | id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); | |
336 | id->eide_pio = __le16_to_cpu(id->eide_pio); | |
337 | id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); | |
338 | for (i = 0; i < 2; ++i) | |
339 | id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); | |
340 | for (i = 0; i < 4; ++i) | |
341 | id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); | |
342 | id->queue_depth = __le16_to_cpu(id->queue_depth); | |
343 | for (i = 0; i < 4; ++i) | |
344 | id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); | |
345 | id->major_rev_num = __le16_to_cpu(id->major_rev_num); | |
346 | id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); | |
347 | id->command_set_1 = __le16_to_cpu(id->command_set_1); | |
348 | id->command_set_2 = __le16_to_cpu(id->command_set_2); | |
349 | id->cfsse = __le16_to_cpu(id->cfsse); | |
350 | id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); | |
351 | id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); | |
352 | id->csf_default = __le16_to_cpu(id->csf_default); | |
353 | id->dma_ultra = __le16_to_cpu(id->dma_ultra); | |
354 | id->trseuc = __le16_to_cpu(id->trseuc); | |
355 | id->trsEuc = __le16_to_cpu(id->trsEuc); | |
356 | id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); | |
357 | id->mprc = __le16_to_cpu(id->mprc); | |
358 | id->hw_config = __le16_to_cpu(id->hw_config); | |
359 | id->acoustic = __le16_to_cpu(id->acoustic); | |
360 | id->msrqs = __le16_to_cpu(id->msrqs); | |
361 | id->sxfert = __le16_to_cpu(id->sxfert); | |
362 | id->sal = __le16_to_cpu(id->sal); | |
363 | id->spg = __le32_to_cpu(id->spg); | |
364 | id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); | |
365 | for (i = 0; i < 22; i++) | |
366 | id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); | |
367 | id->last_lun = __le16_to_cpu(id->last_lun); | |
368 | id->word127 = __le16_to_cpu(id->word127); | |
369 | id->dlf = __le16_to_cpu(id->dlf); | |
370 | id->csfo = __le16_to_cpu(id->csfo); | |
371 | for (i = 0; i < 26; i++) | |
372 | id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); | |
373 | id->word156 = __le16_to_cpu(id->word156); | |
374 | for (i = 0; i < 3; i++) | |
375 | id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); | |
376 | id->cfa_power = __le16_to_cpu(id->cfa_power); | |
377 | for (i = 0; i < 14; i++) | |
378 | id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); | |
379 | for (i = 0; i < 31; i++) | |
380 | id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); | |
381 | for (i = 0; i < 48; i++) | |
382 | id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); | |
383 | id->integrity_word = __le16_to_cpu(id->integrity_word); | |
384 | # else | |
385 | # error "Please fix <asm/byteorder.h>" | |
386 | # endif | |
387 | #endif | |
388 | } | |
389 | ||
01745112 BZ |
390 | /* |
391 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
392 | * removing leading/trailing blanks and compressing internal blanks. | |
393 | * It is primarily used to tidy up the model name/number fields as | |
394 | * returned by the WIN_[P]IDENTIFY commands. | |
395 | */ | |
396 | ||
1da177e4 LT |
397 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
398 | { | |
399 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ | |
400 | ||
401 | if (byteswap) { | |
402 | /* convert from big-endian to host byte order */ | |
403 | for (p = end ; p != s;) { | |
404 | unsigned short *pp = (unsigned short *) (p -= 2); | |
405 | *pp = ntohs(*pp); | |
406 | } | |
407 | } | |
408 | /* strip leading blanks */ | |
409 | while (s != end && *s == ' ') | |
410 | ++s; | |
411 | /* compress internal blanks and strip trailing blanks */ | |
412 | while (s != end && *s) { | |
413 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
414 | *p++ = *(s-1); | |
415 | } | |
416 | /* wipe out trailing garbage */ | |
417 | while (p != end) | |
418 | *p++ = '\0'; | |
419 | } | |
420 | ||
421 | EXPORT_SYMBOL(ide_fixstring); | |
422 | ||
423 | /* | |
424 | * Needed for PCI irq sharing | |
425 | */ | |
426 | int drive_is_ready (ide_drive_t *drive) | |
427 | { | |
428 | ide_hwif_t *hwif = HWIF(drive); | |
429 | u8 stat = 0; | |
430 | ||
431 | if (drive->waiting_for_dma) | |
432 | return hwif->ide_dma_test_irq(drive); | |
433 | ||
434 | #if 0 | |
435 | /* need to guarantee 400ns since last command was issued */ | |
436 | udelay(1); | |
437 | #endif | |
438 | ||
1da177e4 LT |
439 | /* |
440 | * We do a passive status test under shared PCI interrupts on | |
441 | * cards that truly share the ATA side interrupt, but may also share | |
442 | * an interrupt with another pci card/device. We make no assumptions | |
443 | * about possible isa-pnp and pci-pnp issues yet. | |
444 | */ | |
23579a2a | 445 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) |
c47137a9 | 446 | stat = ide_read_altstatus(drive); |
1da177e4 | 447 | else |
1da177e4 | 448 | /* Note: this may clear a pending IRQ!! */ |
c47137a9 | 449 | stat = ide_read_status(drive); |
1da177e4 LT |
450 | |
451 | if (stat & BUSY_STAT) | |
452 | /* drive busy: definitely not interrupting */ | |
453 | return 0; | |
454 | ||
455 | /* drive ready: *might* be interrupting */ | |
456 | return 1; | |
457 | } | |
458 | ||
459 | EXPORT_SYMBOL(drive_is_ready); | |
460 | ||
1da177e4 LT |
461 | /* |
462 | * This routine busy-waits for the drive status to be not "busy". | |
463 | * It then checks the status for all of the "good" bits and none | |
464 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 465 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
466 | * |
467 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
468 | * That could be done by busy-waiting for the first jiffy or two, and then | |
469 | * setting a timer to wake up at half second intervals thereafter, | |
470 | * until timeout is achieved, before timing out. | |
471 | */ | |
aedea591 | 472 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 473 | { |
1da177e4 | 474 | unsigned long flags; |
74af21cf BZ |
475 | int i; |
476 | u8 stat; | |
1da177e4 LT |
477 | |
478 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
c47137a9 BZ |
479 | stat = ide_read_status(drive); |
480 | ||
481 | if (stat & BUSY_STAT) { | |
1da177e4 LT |
482 | local_irq_set(flags); |
483 | timeout += jiffies; | |
c47137a9 | 484 | while ((stat = ide_read_status(drive)) & BUSY_STAT) { |
1da177e4 LT |
485 | if (time_after(jiffies, timeout)) { |
486 | /* | |
487 | * One last read after the timeout in case | |
488 | * heavy interrupt load made us not make any | |
489 | * progress during the timeout.. | |
490 | */ | |
c47137a9 | 491 | stat = ide_read_status(drive); |
1da177e4 LT |
492 | if (!(stat & BUSY_STAT)) |
493 | break; | |
494 | ||
495 | local_irq_restore(flags); | |
74af21cf BZ |
496 | *rstat = stat; |
497 | return -EBUSY; | |
1da177e4 LT |
498 | } |
499 | } | |
500 | local_irq_restore(flags); | |
501 | } | |
502 | /* | |
503 | * Allow status to settle, then read it again. | |
504 | * A few rare drives vastly violate the 400ns spec here, | |
505 | * so we'll wait up to 10usec for a "good" status | |
506 | * rather than expensively fail things immediately. | |
507 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
508 | */ | |
509 | for (i = 0; i < 10; i++) { | |
510 | udelay(1); | |
c47137a9 BZ |
511 | stat = ide_read_status(drive); |
512 | ||
513 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 514 | *rstat = stat; |
1da177e4 | 515 | return 0; |
74af21cf | 516 | } |
1da177e4 | 517 | } |
74af21cf BZ |
518 | *rstat = stat; |
519 | return -EFAULT; | |
520 | } | |
521 | ||
522 | /* | |
523 | * In case of error returns error value after doing "*startstop = ide_error()". | |
524 | * The caller should return the updated value of "startstop" in this case, | |
525 | * "startstop" is unchanged when the function returns 0. | |
526 | */ | |
527 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
528 | { | |
529 | int err; | |
530 | u8 stat; | |
531 | ||
532 | /* bail early if we've exceeded max_failures */ | |
533 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
534 | *startstop = ide_stopped; | |
535 | return 1; | |
536 | } | |
537 | ||
538 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
539 | ||
540 | if (err) { | |
541 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
542 | *startstop = ide_error(drive, s, stat); | |
543 | } | |
544 | ||
545 | return err; | |
1da177e4 LT |
546 | } |
547 | ||
548 | EXPORT_SYMBOL(ide_wait_stat); | |
549 | ||
a5b7e70d BZ |
550 | /** |
551 | * ide_in_drive_list - look for drive in black/white list | |
552 | * @id: drive identifier | |
553 | * @drive_table: list to inspect | |
554 | * | |
555 | * Look for a drive in the blacklist and the whitelist tables | |
556 | * Returns 1 if the drive is found in the table. | |
557 | */ | |
558 | ||
559 | int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) | |
560 | { | |
561 | for ( ; drive_table->id_model; drive_table++) | |
562 | if ((!strcmp(drive_table->id_model, id->model)) && | |
563 | (!drive_table->id_firmware || | |
564 | strstr(id->fw_rev, drive_table->id_firmware))) | |
565 | return 1; | |
566 | return 0; | |
567 | } | |
568 | ||
b0244a00 BZ |
569 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
570 | ||
a5b7e70d BZ |
571 | /* |
572 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
573 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
574 | * |
575 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
576 | */ |
577 | static const struct drive_list_entry ivb_list[] = { | |
578 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 579 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
580 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
581 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
582 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
a5b7e70d BZ |
583 | { NULL , NULL } |
584 | }; | |
585 | ||
1da177e4 LT |
586 | /* |
587 | * All hosts that use the 80c ribbon must use! | |
588 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
589 | */ | |
590 | u8 eighty_ninty_three (ide_drive_t *drive) | |
591 | { | |
7f8f48af BZ |
592 | ide_hwif_t *hwif = drive->hwif; |
593 | struct hd_driveid *id = drive->id; | |
a5b7e70d | 594 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 595 | |
49521f97 BZ |
596 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
597 | return 1; | |
598 | ||
a5b7e70d BZ |
599 | if (ivb) |
600 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
601 | drive->name); | |
602 | ||
b98f8803 GK |
603 | if (ide_dev_is_sata(id) && !ivb) |
604 | return 1; | |
605 | ||
a5b7e70d | 606 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 607 | goto no_80w; |
1a1276e7 | 608 | |
f68d9320 BZ |
609 | /* |
610 | * FIXME: | |
f367bed0 | 611 | * - change master/slave IDENTIFY order |
a5b7e70d | 612 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
613 | * (unless the slave device is pre-ATA3) |
614 | */ | |
a5b7e70d | 615 | if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000))) |
7f8f48af BZ |
616 | return 1; |
617 | ||
618 | no_80w: | |
619 | if (drive->udma33_warned == 1) | |
620 | return 0; | |
621 | ||
622 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
623 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
624 | drive->name, |
625 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af BZ |
626 | |
627 | drive->udma33_warned = 1; | |
628 | ||
629 | return 0; | |
1da177e4 LT |
630 | } |
631 | ||
8a455134 | 632 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 633 | { |
8a455134 | 634 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 635 | struct hd_driveid *id; |
8a455134 | 636 | unsigned long timeout, flags; |
c47137a9 | 637 | u8 stat; |
1da177e4 | 638 | |
1da177e4 LT |
639 | /* |
640 | * Re-read drive->id for possible DMA mode | |
641 | * change (copied from ide-probe.c) | |
642 | */ | |
1da177e4 LT |
643 | |
644 | SELECT_MASK(drive, 1); | |
81ca6919 | 645 | ide_set_irq(drive, 1); |
1da177e4 | 646 | msleep(50); |
23579a2a | 647 | hwif->OUTB(WIN_IDENTIFY, hwif->io_ports[IDE_COMMAND_OFFSET]); |
1da177e4 LT |
648 | timeout = jiffies + WAIT_WORSTCASE; |
649 | do { | |
650 | if (time_after(jiffies, timeout)) { | |
651 | SELECT_MASK(drive, 0); | |
652 | return 0; /* drive timed-out */ | |
653 | } | |
c47137a9 | 654 | |
1da177e4 | 655 | msleep(50); /* give drive a breather */ |
c47137a9 BZ |
656 | stat = ide_read_altstatus(drive); |
657 | } while (stat & BUSY_STAT); | |
658 | ||
1da177e4 | 659 | msleep(50); /* wait for IRQ and DRQ_STAT */ |
c47137a9 BZ |
660 | stat = ide_read_status(drive); |
661 | ||
662 | if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
663 | SELECT_MASK(drive, 0); |
664 | printk("%s: CHECK for good STATUS\n", drive->name); | |
665 | return 0; | |
666 | } | |
667 | local_irq_save(flags); | |
668 | SELECT_MASK(drive, 0); | |
669 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
670 | if (!id) { | |
671 | local_irq_restore(flags); | |
672 | return 0; | |
673 | } | |
7e777185 | 674 | hwif->ata_input_data(drive, id, SECTOR_WORDS); |
c47137a9 | 675 | (void)ide_read_status(drive); /* clear drive IRQ */ |
1da177e4 LT |
676 | local_irq_enable(); |
677 | local_irq_restore(flags); | |
678 | ide_fix_driveid(id); | |
679 | if (id) { | |
680 | drive->id->dma_ultra = id->dma_ultra; | |
681 | drive->id->dma_mword = id->dma_mword; | |
682 | drive->id->dma_1word = id->dma_1word; | |
683 | /* anything more ? */ | |
684 | kfree(id); | |
3ab7efe8 BZ |
685 | |
686 | if (drive->using_dma && ide_id_dma_bug(drive)) | |
687 | ide_dma_off(drive); | |
1da177e4 LT |
688 | } |
689 | ||
690 | return 1; | |
1da177e4 LT |
691 | } |
692 | ||
74af21cf | 693 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 694 | { |
74af21cf | 695 | ide_hwif_t *hwif = drive->hwif; |
89613e66 | 696 | int error = 0; |
1da177e4 LT |
697 | u8 stat; |
698 | ||
699 | // while (HWGROUP(drive)->busy) | |
700 | // msleep(50); | |
701 | ||
702 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
15ce926a BZ |
703 | if (hwif->dma_host_set) /* check if host supports DMA */ |
704 | hwif->dma_host_set(drive, 0); | |
1da177e4 LT |
705 | #endif |
706 | ||
89613e66 SS |
707 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
708 | if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08)) | |
709 | goto skip; | |
710 | ||
1da177e4 LT |
711 | /* |
712 | * Don't use ide_wait_cmd here - it will | |
713 | * attempt to set_geometry and recalibrate, | |
714 | * but for some reason these don't work at | |
715 | * this point (lost interrupt). | |
716 | */ | |
717 | /* | |
718 | * Select the drive, and issue the SETFEATURES command | |
719 | */ | |
720 | disable_irq_nosync(hwif->irq); | |
721 | ||
722 | /* | |
723 | * FIXME: we race against the running IRQ here if | |
724 | * this is called from non IRQ context. If we use | |
725 | * disable_irq() we hang on the error path. Work | |
726 | * is needed. | |
727 | */ | |
728 | ||
729 | udelay(1); | |
730 | SELECT_DRIVE(drive); | |
731 | SELECT_MASK(drive, 0); | |
732 | udelay(1); | |
81ca6919 | 733 | ide_set_irq(drive, 0); |
23579a2a BZ |
734 | hwif->OUTB(speed, hwif->io_ports[IDE_NSECTOR_OFFSET]); |
735 | hwif->OUTB(SETFEATURES_XFER, hwif->io_ports[IDE_FEATURE_OFFSET]); | |
736 | hwif->OUTBSYNC(drive, WIN_SETFEATURES, | |
737 | hwif->io_ports[IDE_COMMAND_OFFSET]); | |
81ca6919 BZ |
738 | if (drive->quirk_list == 2) |
739 | ide_set_irq(drive, 1); | |
1da177e4 | 740 | |
74af21cf BZ |
741 | error = __ide_wait_stat(drive, drive->ready_stat, |
742 | BUSY_STAT|DRQ_STAT|ERR_STAT, | |
743 | WAIT_CMD, &stat); | |
1da177e4 LT |
744 | |
745 | SELECT_MASK(drive, 0); | |
746 | ||
747 | enable_irq(hwif->irq); | |
748 | ||
749 | if (error) { | |
750 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
751 | return error; | |
752 | } | |
753 | ||
754 | drive->id->dma_ultra &= ~0xFF00; | |
755 | drive->id->dma_mword &= ~0x0F00; | |
756 | drive->id->dma_1word &= ~0x0F00; | |
757 | ||
89613e66 | 758 | skip: |
1da177e4 | 759 | #ifdef CONFIG_BLK_DEV_IDEDMA |
f37aaf9e BZ |
760 | if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) && |
761 | drive->using_dma) | |
15ce926a BZ |
762 | hwif->dma_host_set(drive, 1); |
763 | else if (hwif->dma_host_set) /* check if host supports DMA */ | |
4a546e04 | 764 | ide_dma_off_quietly(drive); |
1da177e4 LT |
765 | #endif |
766 | ||
767 | switch(speed) { | |
768 | case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; | |
769 | case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; | |
770 | case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; | |
771 | case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; | |
772 | case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; | |
773 | case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; | |
774 | case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; | |
775 | case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; | |
776 | case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; | |
777 | case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; | |
778 | case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; | |
779 | case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; | |
780 | case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; | |
781 | case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; | |
782 | default: break; | |
783 | } | |
784 | if (!drive->init_speed) | |
785 | drive->init_speed = speed; | |
786 | drive->current_speed = speed; | |
787 | return error; | |
788 | } | |
789 | ||
1da177e4 LT |
790 | /* |
791 | * This should get invoked any time we exit the driver to | |
792 | * wait for an interrupt response from a drive. handler() points | |
793 | * at the appropriate code to handle the next interrupt, and a | |
794 | * timer is started to prevent us from waiting forever in case | |
795 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
796 | * | |
797 | * See also ide_execute_command | |
798 | */ | |
799 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
800 | unsigned int timeout, ide_expiry_t *expiry) | |
801 | { | |
802 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
803 | ||
d30a426d | 804 | BUG_ON(hwgroup->handler); |
1da177e4 LT |
805 | hwgroup->handler = handler; |
806 | hwgroup->expiry = expiry; | |
807 | hwgroup->timer.expires = jiffies + timeout; | |
d30a426d | 808 | hwgroup->req_gen_timer = hwgroup->req_gen; |
1da177e4 LT |
809 | add_timer(&hwgroup->timer); |
810 | } | |
811 | ||
812 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
813 | unsigned int timeout, ide_expiry_t *expiry) | |
814 | { | |
815 | unsigned long flags; | |
816 | spin_lock_irqsave(&ide_lock, flags); | |
817 | __ide_set_handler(drive, handler, timeout, expiry); | |
818 | spin_unlock_irqrestore(&ide_lock, flags); | |
819 | } | |
820 | ||
821 | EXPORT_SYMBOL(ide_set_handler); | |
822 | ||
823 | /** | |
824 | * ide_execute_command - execute an IDE command | |
825 | * @drive: IDE drive to issue the command against | |
826 | * @command: command byte to write | |
827 | * @handler: handler for next phase | |
828 | * @timeout: timeout for command | |
829 | * @expiry: handler to run on timeout | |
830 | * | |
831 | * Helper function to issue an IDE command. This handles the | |
832 | * atomicity requirements, command timing and ensures that the | |
833 | * handler and IRQ setup do not race. All IDE command kick off | |
834 | * should go via this function or do equivalent locking. | |
835 | */ | |
cd2a2d96 BZ |
836 | |
837 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
838 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 LT |
839 | { |
840 | unsigned long flags; | |
1da177e4 | 841 | ide_hwif_t *hwif = HWIF(drive); |
629f944b | 842 | |
1da177e4 | 843 | spin_lock_irqsave(&ide_lock, flags); |
629f944b | 844 | __ide_set_handler(drive, handler, timeout, expiry); |
23579a2a | 845 | hwif->OUTBSYNC(drive, cmd, hwif->io_ports[IDE_COMMAND_OFFSET]); |
629f944b BZ |
846 | /* |
847 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
848 | * serviced before that. | |
849 | * | |
850 | * FIXME: we could skip this delay with care on non shared devices | |
851 | */ | |
1da177e4 LT |
852 | ndelay(400); |
853 | spin_unlock_irqrestore(&ide_lock, flags); | |
854 | } | |
855 | ||
856 | EXPORT_SYMBOL(ide_execute_command); | |
857 | ||
858 | ||
859 | /* needed below */ | |
860 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
861 | ||
862 | /* | |
863 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
864 | * during an atapi drive reset operation. If the drive has not yet responded, | |
865 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
866 | * for another 50ms. | |
867 | */ | |
868 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
869 | { | |
870 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1da177e4 LT |
871 | u8 stat; |
872 | ||
873 | SELECT_DRIVE(drive); | |
874 | udelay (10); | |
c47137a9 | 875 | stat = ide_read_status(drive); |
1da177e4 | 876 | |
c47137a9 | 877 | if (OK_STAT(stat, 0, BUSY_STAT)) |
1da177e4 | 878 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 879 | else { |
1da177e4 | 880 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
881 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
882 | /* continue polling */ | |
883 | return ide_started; | |
884 | } | |
885 | /* end of polling */ | |
886 | hwgroup->polling = 0; | |
887 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
888 | drive->name, stat); | |
889 | /* do it the old fashioned way */ | |
890 | return do_reset1(drive, 1); | |
891 | } | |
892 | /* done polling */ | |
893 | hwgroup->polling = 0; | |
913759ac | 894 | hwgroup->resetting = 0; |
1da177e4 LT |
895 | return ide_stopped; |
896 | } | |
897 | ||
898 | /* | |
899 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
900 | * during an ide reset operation. If the drives have not yet responded, | |
901 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
902 | * for another 50ms. | |
903 | */ | |
904 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
905 | { | |
906 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
907 | ide_hwif_t *hwif = HWIF(drive); | |
908 | u8 tmp; | |
909 | ||
910 | if (hwif->reset_poll != NULL) { | |
911 | if (hwif->reset_poll(drive)) { | |
912 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", | |
913 | hwif->name, drive->name); | |
914 | return ide_stopped; | |
915 | } | |
916 | } | |
917 | ||
c47137a9 BZ |
918 | tmp = ide_read_status(drive); |
919 | ||
920 | if (!OK_STAT(tmp, 0, BUSY_STAT)) { | |
1da177e4 | 921 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
922 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
923 | /* continue polling */ | |
924 | return ide_started; | |
925 | } | |
926 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
927 | drive->failures++; | |
928 | } else { | |
929 | printk("%s: reset: ", hwif->name); | |
64a57fe4 BZ |
930 | tmp = ide_read_error(drive); |
931 | ||
932 | if (tmp == 1) { | |
1da177e4 LT |
933 | printk("success\n"); |
934 | drive->failures = 0; | |
935 | } else { | |
936 | drive->failures++; | |
937 | printk("master: "); | |
938 | switch (tmp & 0x7f) { | |
939 | case 1: printk("passed"); | |
940 | break; | |
941 | case 2: printk("formatter device error"); | |
942 | break; | |
943 | case 3: printk("sector buffer error"); | |
944 | break; | |
945 | case 4: printk("ECC circuitry error"); | |
946 | break; | |
947 | case 5: printk("controlling MPU error"); | |
948 | break; | |
949 | default:printk("error (0x%02x?)", tmp); | |
950 | } | |
951 | if (tmp & 0x80) | |
952 | printk("; slave: failed"); | |
953 | printk("\n"); | |
954 | } | |
955 | } | |
956 | hwgroup->polling = 0; /* done polling */ | |
913759ac | 957 | hwgroup->resetting = 0; /* done reset attempt */ |
1da177e4 LT |
958 | return ide_stopped; |
959 | } | |
960 | ||
1da177e4 LT |
961 | static void ide_disk_pre_reset(ide_drive_t *drive) |
962 | { | |
963 | int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; | |
964 | ||
965 | drive->special.all = 0; | |
966 | drive->special.b.set_geometry = legacy; | |
967 | drive->special.b.recalibrate = legacy; | |
4ee06b7e | 968 | drive->mult_count = 0; |
1da177e4 LT |
969 | if (!drive->keep_settings && !drive->using_dma) |
970 | drive->mult_req = 0; | |
971 | if (drive->mult_req != drive->mult_count) | |
972 | drive->special.b.set_multmode = 1; | |
973 | } | |
974 | ||
975 | static void pre_reset(ide_drive_t *drive) | |
976 | { | |
977 | if (drive->media == ide_disk) | |
978 | ide_disk_pre_reset(drive); | |
979 | else | |
980 | drive->post_reset = 1; | |
981 | ||
99ffbe0e BZ |
982 | if (drive->using_dma) { |
983 | if (drive->crc_count) | |
578cfa0d | 984 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
985 | else |
986 | ide_dma_off(drive); | |
987 | } | |
988 | ||
989 | if (!drive->keep_settings) { | |
990 | if (!drive->using_dma) { | |
1da177e4 LT |
991 | drive->unmask = 0; |
992 | drive->io_32bit = 0; | |
993 | } | |
994 | return; | |
995 | } | |
1da177e4 LT |
996 | |
997 | if (HWIF(drive)->pre_reset != NULL) | |
998 | HWIF(drive)->pre_reset(drive); | |
999 | ||
513daadd SS |
1000 | if (drive->current_speed != 0xff) |
1001 | drive->desired_speed = drive->current_speed; | |
1002 | drive->current_speed = 0xff; | |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | /* | |
1006 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1007 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1008 | * the same interface, so it can really be thought of as resetting the | |
1009 | * interface rather than resetting the drive. | |
1010 | * | |
1011 | * ATAPI devices have their own reset mechanism which allows them to be | |
1012 | * individually reset without clobbering other devices on the same interface. | |
1013 | * | |
1014 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1015 | * us know when the reset operation has finished, so we must poll for this. | |
1016 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1017 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1018 | * we set a timer to poll at 50ms intervals. | |
1019 | */ | |
1020 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1021 | { | |
1022 | unsigned int unit; | |
1023 | unsigned long flags; | |
1024 | ide_hwif_t *hwif; | |
1025 | ide_hwgroup_t *hwgroup; | |
23579a2a BZ |
1026 | u8 ctl; |
1027 | ||
1da177e4 LT |
1028 | spin_lock_irqsave(&ide_lock, flags); |
1029 | hwif = HWIF(drive); | |
1030 | hwgroup = HWGROUP(drive); | |
1031 | ||
1032 | /* We must not reset with running handlers */ | |
125e1874 | 1033 | BUG_ON(hwgroup->handler != NULL); |
1da177e4 LT |
1034 | |
1035 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1036 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
913759ac | 1037 | hwgroup->resetting = 1; |
1da177e4 LT |
1038 | pre_reset(drive); |
1039 | SELECT_DRIVE(drive); | |
1040 | udelay (20); | |
23579a2a BZ |
1041 | hwif->OUTBSYNC(drive, WIN_SRST, |
1042 | hwif->io_ports[IDE_COMMAND_OFFSET]); | |
68ad9910 | 1043 | ndelay(400); |
1da177e4 LT |
1044 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1045 | hwgroup->polling = 1; | |
1046 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1047 | spin_unlock_irqrestore(&ide_lock, flags); | |
1048 | return ide_started; | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * First, reset any device state data we were maintaining | |
1053 | * for any of the drives on this interface. | |
1054 | */ | |
1055 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1056 | pre_reset(&hwif->drives[unit]); | |
1057 | ||
23579a2a | 1058 | if (hwif->io_ports[IDE_CONTROL_OFFSET] == 0) { |
1da177e4 LT |
1059 | spin_unlock_irqrestore(&ide_lock, flags); |
1060 | return ide_stopped; | |
1061 | } | |
1062 | ||
913759ac | 1063 | hwgroup->resetting = 1; |
1da177e4 LT |
1064 | /* |
1065 | * Note that we also set nIEN while resetting the device, | |
1066 | * to mask unwanted interrupts from the interface during the reset. | |
1067 | * However, due to the design of PC hardware, this will cause an | |
1068 | * immediate interrupt due to the edge transition it produces. | |
1069 | * This single interrupt gives us a "fast poll" for drives that | |
1070 | * recover from reset very quickly, saving us the first 50ms wait time. | |
1071 | */ | |
1072 | /* set SRST and nIEN */ | |
23579a2a | 1073 | hwif->OUTBSYNC(drive, drive->ctl|6, hwif->io_ports[IDE_CONTROL_OFFSET]); |
1da177e4 LT |
1074 | /* more than enough time */ |
1075 | udelay(10); | |
23579a2a BZ |
1076 | if (drive->quirk_list == 2) |
1077 | ctl = drive->ctl; /* clear SRST and nIEN */ | |
1078 | else | |
1079 | ctl = drive->ctl | 2; /* clear SRST, leave nIEN */ | |
1080 | hwif->OUTBSYNC(drive, ctl, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
1da177e4 LT |
1081 | /* more than enough time */ |
1082 | udelay(10); | |
1083 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1084 | hwgroup->polling = 1; | |
1085 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1086 | ||
1087 | /* | |
1088 | * Some weird controller like resetting themselves to a strange | |
1089 | * state when the disks are reset this way. At least, the Winbond | |
1090 | * 553 documentation says that | |
1091 | */ | |
4ee06b7e | 1092 | if (hwif->resetproc) |
1da177e4 | 1093 | hwif->resetproc(drive); |
1da177e4 LT |
1094 | |
1095 | spin_unlock_irqrestore(&ide_lock, flags); | |
1096 | return ide_started; | |
1097 | } | |
1098 | ||
1099 | /* | |
1100 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1101 | */ | |
1102 | ||
1103 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1104 | { | |
1105 | return do_reset1(drive, 0); | |
1106 | } | |
1107 | ||
1108 | EXPORT_SYMBOL(ide_do_reset); | |
1109 | ||
1110 | /* | |
1111 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1112 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1113 | */ |
1114 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1115 | { | |
1116 | u8 stat = 0; | |
1117 | ||
1118 | while(timeout--) { | |
1119 | /* | |
1120 | * Turn this into a schedule() sleep once I'm sure | |
1121 | * about locking issues (2.5 work ?). | |
1122 | */ | |
1123 | mdelay(1); | |
1124 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); | |
1125 | if ((stat & BUSY_STAT) == 0) | |
1126 | return 0; | |
1127 | /* | |
1128 | * Assume a value of 0xff means nothing is connected to | |
1129 | * the interface and it doesn't implement the pull-down | |
1130 | * resistor on D7. | |
1131 | */ | |
1132 | if (stat == 0xff) | |
1133 | return -ENODEV; | |
6842f8c8 | 1134 | touch_softlockup_watchdog(); |
1e86240f | 1135 | touch_nmi_watchdog(); |
1da177e4 LT |
1136 | } |
1137 | return -EBUSY; | |
1138 | } | |
1139 | ||
1140 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1141 |