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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/ide-iops.c Version 0.37 Mar 05, 2003 | |
3 | * | |
4 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> | |
5 | * Copyright (C) 2003 Red Hat <alan@redhat.com> | |
6 | * | |
7 | */ | |
8 | ||
9 | #include <linux/config.h> | |
10 | #include <linux/module.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/string.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/timer.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/major.h> | |
18 | #include <linux/errno.h> | |
19 | #include <linux/genhd.h> | |
20 | #include <linux/blkpg.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/pci.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/hdreg.h> | |
25 | #include <linux/ide.h> | |
26 | #include <linux/bitops.h> | |
27 | ||
28 | #include <asm/byteorder.h> | |
29 | #include <asm/irq.h> | |
30 | #include <asm/uaccess.h> | |
31 | #include <asm/io.h> | |
32 | ||
33 | /* | |
34 | * Conventional PIO operations for ATA devices | |
35 | */ | |
36 | ||
37 | static u8 ide_inb (unsigned long port) | |
38 | { | |
39 | return (u8) inb(port); | |
40 | } | |
41 | ||
42 | static u16 ide_inw (unsigned long port) | |
43 | { | |
44 | return (u16) inw(port); | |
45 | } | |
46 | ||
47 | static void ide_insw (unsigned long port, void *addr, u32 count) | |
48 | { | |
49 | insw(port, addr, count); | |
50 | } | |
51 | ||
52 | static u32 ide_inl (unsigned long port) | |
53 | { | |
54 | return (u32) inl(port); | |
55 | } | |
56 | ||
57 | static void ide_insl (unsigned long port, void *addr, u32 count) | |
58 | { | |
59 | insl(port, addr, count); | |
60 | } | |
61 | ||
62 | static void ide_outb (u8 val, unsigned long port) | |
63 | { | |
64 | outb(val, port); | |
65 | } | |
66 | ||
67 | static void ide_outbsync (ide_drive_t *drive, u8 addr, unsigned long port) | |
68 | { | |
69 | outb(addr, port); | |
70 | } | |
71 | ||
72 | static void ide_outw (u16 val, unsigned long port) | |
73 | { | |
74 | outw(val, port); | |
75 | } | |
76 | ||
77 | static void ide_outsw (unsigned long port, void *addr, u32 count) | |
78 | { | |
79 | outsw(port, addr, count); | |
80 | } | |
81 | ||
82 | static void ide_outl (u32 val, unsigned long port) | |
83 | { | |
84 | outl(val, port); | |
85 | } | |
86 | ||
87 | static void ide_outsl (unsigned long port, void *addr, u32 count) | |
88 | { | |
89 | outsl(port, addr, count); | |
90 | } | |
91 | ||
92 | void default_hwif_iops (ide_hwif_t *hwif) | |
93 | { | |
94 | hwif->OUTB = ide_outb; | |
95 | hwif->OUTBSYNC = ide_outbsync; | |
96 | hwif->OUTW = ide_outw; | |
97 | hwif->OUTL = ide_outl; | |
98 | hwif->OUTSW = ide_outsw; | |
99 | hwif->OUTSL = ide_outsl; | |
100 | hwif->INB = ide_inb; | |
101 | hwif->INW = ide_inw; | |
102 | hwif->INL = ide_inl; | |
103 | hwif->INSW = ide_insw; | |
104 | hwif->INSL = ide_insl; | |
105 | } | |
106 | ||
1da177e4 LT |
107 | /* |
108 | * MMIO operations, typically used for SATA controllers | |
109 | */ | |
110 | ||
111 | static u8 ide_mm_inb (unsigned long port) | |
112 | { | |
113 | return (u8) readb((void __iomem *) port); | |
114 | } | |
115 | ||
116 | static u16 ide_mm_inw (unsigned long port) | |
117 | { | |
118 | return (u16) readw((void __iomem *) port); | |
119 | } | |
120 | ||
121 | static void ide_mm_insw (unsigned long port, void *addr, u32 count) | |
122 | { | |
123 | __ide_mm_insw((void __iomem *) port, addr, count); | |
124 | } | |
125 | ||
126 | static u32 ide_mm_inl (unsigned long port) | |
127 | { | |
128 | return (u32) readl((void __iomem *) port); | |
129 | } | |
130 | ||
131 | static void ide_mm_insl (unsigned long port, void *addr, u32 count) | |
132 | { | |
133 | __ide_mm_insl((void __iomem *) port, addr, count); | |
134 | } | |
135 | ||
136 | static void ide_mm_outb (u8 value, unsigned long port) | |
137 | { | |
138 | writeb(value, (void __iomem *) port); | |
139 | } | |
140 | ||
141 | static void ide_mm_outbsync (ide_drive_t *drive, u8 value, unsigned long port) | |
142 | { | |
143 | writeb(value, (void __iomem *) port); | |
144 | } | |
145 | ||
146 | static void ide_mm_outw (u16 value, unsigned long port) | |
147 | { | |
148 | writew(value, (void __iomem *) port); | |
149 | } | |
150 | ||
151 | static void ide_mm_outsw (unsigned long port, void *addr, u32 count) | |
152 | { | |
153 | __ide_mm_outsw((void __iomem *) port, addr, count); | |
154 | } | |
155 | ||
156 | static void ide_mm_outl (u32 value, unsigned long port) | |
157 | { | |
158 | writel(value, (void __iomem *) port); | |
159 | } | |
160 | ||
161 | static void ide_mm_outsl (unsigned long port, void *addr, u32 count) | |
162 | { | |
163 | __ide_mm_outsl((void __iomem *) port, addr, count); | |
164 | } | |
165 | ||
166 | void default_hwif_mmiops (ide_hwif_t *hwif) | |
167 | { | |
168 | hwif->OUTB = ide_mm_outb; | |
169 | /* Most systems will need to override OUTBSYNC, alas however | |
170 | this one is controller specific! */ | |
171 | hwif->OUTBSYNC = ide_mm_outbsync; | |
172 | hwif->OUTW = ide_mm_outw; | |
173 | hwif->OUTL = ide_mm_outl; | |
174 | hwif->OUTSW = ide_mm_outsw; | |
175 | hwif->OUTSL = ide_mm_outsl; | |
176 | hwif->INB = ide_mm_inb; | |
177 | hwif->INW = ide_mm_inw; | |
178 | hwif->INL = ide_mm_inl; | |
179 | hwif->INSW = ide_mm_insw; | |
180 | hwif->INSL = ide_mm_insl; | |
181 | } | |
182 | ||
183 | EXPORT_SYMBOL(default_hwif_mmiops); | |
184 | ||
185 | u32 ide_read_24 (ide_drive_t *drive) | |
186 | { | |
187 | u8 hcyl = HWIF(drive)->INB(IDE_HCYL_REG); | |
188 | u8 lcyl = HWIF(drive)->INB(IDE_LCYL_REG); | |
189 | u8 sect = HWIF(drive)->INB(IDE_SECTOR_REG); | |
190 | return (hcyl<<16)|(lcyl<<8)|sect; | |
191 | } | |
192 | ||
193 | void SELECT_DRIVE (ide_drive_t *drive) | |
194 | { | |
195 | if (HWIF(drive)->selectproc) | |
196 | HWIF(drive)->selectproc(drive); | |
197 | HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); | |
198 | } | |
199 | ||
200 | EXPORT_SYMBOL(SELECT_DRIVE); | |
201 | ||
202 | void SELECT_INTERRUPT (ide_drive_t *drive) | |
203 | { | |
204 | if (HWIF(drive)->intrproc) | |
205 | HWIF(drive)->intrproc(drive); | |
206 | else | |
207 | HWIF(drive)->OUTB(drive->ctl|2, IDE_CONTROL_REG); | |
208 | } | |
209 | ||
210 | void SELECT_MASK (ide_drive_t *drive, int mask) | |
211 | { | |
212 | if (HWIF(drive)->maskproc) | |
213 | HWIF(drive)->maskproc(drive, mask); | |
214 | } | |
215 | ||
216 | void QUIRK_LIST (ide_drive_t *drive) | |
217 | { | |
218 | if (HWIF(drive)->quirkproc) | |
219 | drive->quirk_list = HWIF(drive)->quirkproc(drive); | |
220 | } | |
221 | ||
222 | /* | |
223 | * Some localbus EIDE interfaces require a special access sequence | |
224 | * when using 32-bit I/O instructions to transfer data. We call this | |
225 | * the "vlb_sync" sequence, which consists of three successive reads | |
226 | * of the sector count register location, with interrupts disabled | |
227 | * to ensure that the reads all happen together. | |
228 | */ | |
229 | static void ata_vlb_sync(ide_drive_t *drive, unsigned long port) | |
230 | { | |
231 | (void) HWIF(drive)->INB(port); | |
232 | (void) HWIF(drive)->INB(port); | |
233 | (void) HWIF(drive)->INB(port); | |
234 | } | |
235 | ||
236 | /* | |
237 | * This is used for most PIO data transfers *from* the IDE interface | |
238 | */ | |
239 | static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
240 | { | |
241 | ide_hwif_t *hwif = HWIF(drive); | |
242 | u8 io_32bit = drive->io_32bit; | |
243 | ||
244 | if (io_32bit) { | |
245 | if (io_32bit & 2) { | |
246 | unsigned long flags; | |
247 | local_irq_save(flags); | |
248 | ata_vlb_sync(drive, IDE_NSECTOR_REG); | |
249 | hwif->INSL(IDE_DATA_REG, buffer, wcount); | |
250 | local_irq_restore(flags); | |
251 | } else | |
252 | hwif->INSL(IDE_DATA_REG, buffer, wcount); | |
253 | } else { | |
254 | hwif->INSW(IDE_DATA_REG, buffer, wcount<<1); | |
255 | } | |
256 | } | |
257 | ||
258 | /* | |
259 | * This is used for most PIO data transfers *to* the IDE interface | |
260 | */ | |
261 | static void ata_output_data(ide_drive_t *drive, void *buffer, u32 wcount) | |
262 | { | |
263 | ide_hwif_t *hwif = HWIF(drive); | |
264 | u8 io_32bit = drive->io_32bit; | |
265 | ||
266 | if (io_32bit) { | |
267 | if (io_32bit & 2) { | |
268 | unsigned long flags; | |
269 | local_irq_save(flags); | |
270 | ata_vlb_sync(drive, IDE_NSECTOR_REG); | |
271 | hwif->OUTSL(IDE_DATA_REG, buffer, wcount); | |
272 | local_irq_restore(flags); | |
273 | } else | |
274 | hwif->OUTSL(IDE_DATA_REG, buffer, wcount); | |
275 | } else { | |
276 | hwif->OUTSW(IDE_DATA_REG, buffer, wcount<<1); | |
277 | } | |
278 | } | |
279 | ||
280 | /* | |
281 | * The following routines are mainly used by the ATAPI drivers. | |
282 | * | |
283 | * These routines will round up any request for an odd number of bytes, | |
284 | * so if an odd bytecount is specified, be sure that there's at least one | |
285 | * extra byte allocated for the buffer. | |
286 | */ | |
287 | ||
288 | static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) | |
289 | { | |
290 | ide_hwif_t *hwif = HWIF(drive); | |
291 | ||
292 | ++bytecount; | |
293 | #if defined(CONFIG_ATARI) || defined(CONFIG_Q40) | |
294 | if (MACH_IS_ATARI || MACH_IS_Q40) { | |
295 | /* Atari has a byte-swapped IDE interface */ | |
296 | insw_swapw(IDE_DATA_REG, buffer, bytecount / 2); | |
297 | return; | |
298 | } | |
299 | #endif /* CONFIG_ATARI || CONFIG_Q40 */ | |
300 | hwif->ata_input_data(drive, buffer, bytecount / 4); | |
301 | if ((bytecount & 0x03) >= 2) | |
302 | hwif->INSW(IDE_DATA_REG, ((u8 *)buffer)+(bytecount & ~0x03), 1); | |
303 | } | |
304 | ||
305 | static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) | |
306 | { | |
307 | ide_hwif_t *hwif = HWIF(drive); | |
308 | ||
309 | ++bytecount; | |
310 | #if defined(CONFIG_ATARI) || defined(CONFIG_Q40) | |
311 | if (MACH_IS_ATARI || MACH_IS_Q40) { | |
312 | /* Atari has a byte-swapped IDE interface */ | |
313 | outsw_swapw(IDE_DATA_REG, buffer, bytecount / 2); | |
314 | return; | |
315 | } | |
316 | #endif /* CONFIG_ATARI || CONFIG_Q40 */ | |
317 | hwif->ata_output_data(drive, buffer, bytecount / 4); | |
318 | if ((bytecount & 0x03) >= 2) | |
319 | hwif->OUTSW(IDE_DATA_REG, ((u8*)buffer)+(bytecount & ~0x03), 1); | |
320 | } | |
321 | ||
322 | void default_hwif_transport(ide_hwif_t *hwif) | |
323 | { | |
324 | hwif->ata_input_data = ata_input_data; | |
325 | hwif->ata_output_data = ata_output_data; | |
326 | hwif->atapi_input_bytes = atapi_input_bytes; | |
327 | hwif->atapi_output_bytes = atapi_output_bytes; | |
328 | } | |
329 | ||
1da177e4 LT |
330 | /* |
331 | * Beginning of Taskfile OPCODE Library and feature sets. | |
332 | */ | |
333 | void ide_fix_driveid (struct hd_driveid *id) | |
334 | { | |
335 | #ifndef __LITTLE_ENDIAN | |
336 | # ifdef __BIG_ENDIAN | |
337 | int i; | |
338 | u16 *stringcast; | |
339 | ||
340 | id->config = __le16_to_cpu(id->config); | |
341 | id->cyls = __le16_to_cpu(id->cyls); | |
342 | id->reserved2 = __le16_to_cpu(id->reserved2); | |
343 | id->heads = __le16_to_cpu(id->heads); | |
344 | id->track_bytes = __le16_to_cpu(id->track_bytes); | |
345 | id->sector_bytes = __le16_to_cpu(id->sector_bytes); | |
346 | id->sectors = __le16_to_cpu(id->sectors); | |
347 | id->vendor0 = __le16_to_cpu(id->vendor0); | |
348 | id->vendor1 = __le16_to_cpu(id->vendor1); | |
349 | id->vendor2 = __le16_to_cpu(id->vendor2); | |
350 | stringcast = (u16 *)&id->serial_no[0]; | |
351 | for (i = 0; i < (20/2); i++) | |
352 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
353 | id->buf_type = __le16_to_cpu(id->buf_type); | |
354 | id->buf_size = __le16_to_cpu(id->buf_size); | |
355 | id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); | |
356 | stringcast = (u16 *)&id->fw_rev[0]; | |
357 | for (i = 0; i < (8/2); i++) | |
358 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
359 | stringcast = (u16 *)&id->model[0]; | |
360 | for (i = 0; i < (40/2); i++) | |
361 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
362 | id->dword_io = __le16_to_cpu(id->dword_io); | |
363 | id->reserved50 = __le16_to_cpu(id->reserved50); | |
364 | id->field_valid = __le16_to_cpu(id->field_valid); | |
365 | id->cur_cyls = __le16_to_cpu(id->cur_cyls); | |
366 | id->cur_heads = __le16_to_cpu(id->cur_heads); | |
367 | id->cur_sectors = __le16_to_cpu(id->cur_sectors); | |
368 | id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); | |
369 | id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); | |
370 | id->lba_capacity = __le32_to_cpu(id->lba_capacity); | |
371 | id->dma_1word = __le16_to_cpu(id->dma_1word); | |
372 | id->dma_mword = __le16_to_cpu(id->dma_mword); | |
373 | id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); | |
374 | id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); | |
375 | id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); | |
376 | id->eide_pio = __le16_to_cpu(id->eide_pio); | |
377 | id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); | |
378 | for (i = 0; i < 2; ++i) | |
379 | id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); | |
380 | for (i = 0; i < 4; ++i) | |
381 | id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); | |
382 | id->queue_depth = __le16_to_cpu(id->queue_depth); | |
383 | for (i = 0; i < 4; ++i) | |
384 | id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); | |
385 | id->major_rev_num = __le16_to_cpu(id->major_rev_num); | |
386 | id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); | |
387 | id->command_set_1 = __le16_to_cpu(id->command_set_1); | |
388 | id->command_set_2 = __le16_to_cpu(id->command_set_2); | |
389 | id->cfsse = __le16_to_cpu(id->cfsse); | |
390 | id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); | |
391 | id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); | |
392 | id->csf_default = __le16_to_cpu(id->csf_default); | |
393 | id->dma_ultra = __le16_to_cpu(id->dma_ultra); | |
394 | id->trseuc = __le16_to_cpu(id->trseuc); | |
395 | id->trsEuc = __le16_to_cpu(id->trsEuc); | |
396 | id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); | |
397 | id->mprc = __le16_to_cpu(id->mprc); | |
398 | id->hw_config = __le16_to_cpu(id->hw_config); | |
399 | id->acoustic = __le16_to_cpu(id->acoustic); | |
400 | id->msrqs = __le16_to_cpu(id->msrqs); | |
401 | id->sxfert = __le16_to_cpu(id->sxfert); | |
402 | id->sal = __le16_to_cpu(id->sal); | |
403 | id->spg = __le32_to_cpu(id->spg); | |
404 | id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); | |
405 | for (i = 0; i < 22; i++) | |
406 | id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); | |
407 | id->last_lun = __le16_to_cpu(id->last_lun); | |
408 | id->word127 = __le16_to_cpu(id->word127); | |
409 | id->dlf = __le16_to_cpu(id->dlf); | |
410 | id->csfo = __le16_to_cpu(id->csfo); | |
411 | for (i = 0; i < 26; i++) | |
412 | id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); | |
413 | id->word156 = __le16_to_cpu(id->word156); | |
414 | for (i = 0; i < 3; i++) | |
415 | id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); | |
416 | id->cfa_power = __le16_to_cpu(id->cfa_power); | |
417 | for (i = 0; i < 14; i++) | |
418 | id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); | |
419 | for (i = 0; i < 31; i++) | |
420 | id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); | |
421 | for (i = 0; i < 48; i++) | |
422 | id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); | |
423 | id->integrity_word = __le16_to_cpu(id->integrity_word); | |
424 | # else | |
425 | # error "Please fix <asm/byteorder.h>" | |
426 | # endif | |
427 | #endif | |
428 | } | |
429 | ||
430 | /* FIXME: exported for use by the USB storage (isd200.c) code only */ | |
431 | EXPORT_SYMBOL(ide_fix_driveid); | |
432 | ||
433 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) | |
434 | { | |
435 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ | |
436 | ||
437 | if (byteswap) { | |
438 | /* convert from big-endian to host byte order */ | |
439 | for (p = end ; p != s;) { | |
440 | unsigned short *pp = (unsigned short *) (p -= 2); | |
441 | *pp = ntohs(*pp); | |
442 | } | |
443 | } | |
444 | /* strip leading blanks */ | |
445 | while (s != end && *s == ' ') | |
446 | ++s; | |
447 | /* compress internal blanks and strip trailing blanks */ | |
448 | while (s != end && *s) { | |
449 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
450 | *p++ = *(s-1); | |
451 | } | |
452 | /* wipe out trailing garbage */ | |
453 | while (p != end) | |
454 | *p++ = '\0'; | |
455 | } | |
456 | ||
457 | EXPORT_SYMBOL(ide_fixstring); | |
458 | ||
459 | /* | |
460 | * Needed for PCI irq sharing | |
461 | */ | |
462 | int drive_is_ready (ide_drive_t *drive) | |
463 | { | |
464 | ide_hwif_t *hwif = HWIF(drive); | |
465 | u8 stat = 0; | |
466 | ||
467 | if (drive->waiting_for_dma) | |
468 | return hwif->ide_dma_test_irq(drive); | |
469 | ||
470 | #if 0 | |
471 | /* need to guarantee 400ns since last command was issued */ | |
472 | udelay(1); | |
473 | #endif | |
474 | ||
475 | #ifdef CONFIG_IDEPCI_SHARE_IRQ | |
476 | /* | |
477 | * We do a passive status test under shared PCI interrupts on | |
478 | * cards that truly share the ATA side interrupt, but may also share | |
479 | * an interrupt with another pci card/device. We make no assumptions | |
480 | * about possible isa-pnp and pci-pnp issues yet. | |
481 | */ | |
482 | if (IDE_CONTROL_REG) | |
483 | stat = hwif->INB(IDE_ALTSTATUS_REG); | |
484 | else | |
485 | #endif /* CONFIG_IDEPCI_SHARE_IRQ */ | |
486 | /* Note: this may clear a pending IRQ!! */ | |
487 | stat = hwif->INB(IDE_STATUS_REG); | |
488 | ||
489 | if (stat & BUSY_STAT) | |
490 | /* drive busy: definitely not interrupting */ | |
491 | return 0; | |
492 | ||
493 | /* drive ready: *might* be interrupting */ | |
494 | return 1; | |
495 | } | |
496 | ||
497 | EXPORT_SYMBOL(drive_is_ready); | |
498 | ||
499 | /* | |
500 | * Global for All, and taken from ide-pmac.c. Can be called | |
501 | * with spinlock held & IRQs disabled, so don't schedule ! | |
502 | */ | |
503 | int wait_for_ready (ide_drive_t *drive, int timeout) | |
504 | { | |
505 | ide_hwif_t *hwif = HWIF(drive); | |
506 | u8 stat = 0; | |
507 | ||
508 | while(--timeout) { | |
509 | stat = hwif->INB(IDE_STATUS_REG); | |
510 | if (!(stat & BUSY_STAT)) { | |
511 | if (drive->ready_stat == 0) | |
512 | break; | |
513 | else if ((stat & drive->ready_stat)||(stat & ERR_STAT)) | |
514 | break; | |
515 | } | |
516 | mdelay(1); | |
517 | } | |
518 | if ((stat & ERR_STAT) || timeout <= 0) { | |
519 | if (stat & ERR_STAT) { | |
520 | printk(KERN_ERR "%s: wait_for_ready, " | |
521 | "error status: %x\n", drive->name, stat); | |
522 | } | |
523 | return 1; | |
524 | } | |
525 | return 0; | |
526 | } | |
527 | ||
1da177e4 LT |
528 | /* |
529 | * This routine busy-waits for the drive status to be not "busy". | |
530 | * It then checks the status for all of the "good" bits and none | |
531 | * of the "bad" bits, and if all is okay it returns 0. All other | |
532 | * cases return 1 after invoking ide_error() -- caller should just return. | |
533 | * | |
534 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
535 | * That could be done by busy-waiting for the first jiffy or two, and then | |
536 | * setting a timer to wake up at half second intervals thereafter, | |
537 | * until timeout is achieved, before timing out. | |
538 | */ | |
539 | int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
540 | { | |
541 | ide_hwif_t *hwif = HWIF(drive); | |
542 | u8 stat; | |
543 | int i; | |
544 | unsigned long flags; | |
545 | ||
546 | /* bail early if we've exceeded max_failures */ | |
547 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
548 | *startstop = ide_stopped; | |
549 | return 1; | |
550 | } | |
551 | ||
552 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
553 | if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { | |
554 | local_irq_set(flags); | |
555 | timeout += jiffies; | |
556 | while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { | |
557 | if (time_after(jiffies, timeout)) { | |
558 | /* | |
559 | * One last read after the timeout in case | |
560 | * heavy interrupt load made us not make any | |
561 | * progress during the timeout.. | |
562 | */ | |
563 | stat = hwif->INB(IDE_STATUS_REG); | |
564 | if (!(stat & BUSY_STAT)) | |
565 | break; | |
566 | ||
567 | local_irq_restore(flags); | |
568 | *startstop = ide_error(drive, "status timeout", stat); | |
569 | return 1; | |
570 | } | |
571 | } | |
572 | local_irq_restore(flags); | |
573 | } | |
574 | /* | |
575 | * Allow status to settle, then read it again. | |
576 | * A few rare drives vastly violate the 400ns spec here, | |
577 | * so we'll wait up to 10usec for a "good" status | |
578 | * rather than expensively fail things immediately. | |
579 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
580 | */ | |
581 | for (i = 0; i < 10; i++) { | |
582 | udelay(1); | |
583 | if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), good, bad)) | |
584 | return 0; | |
585 | } | |
586 | *startstop = ide_error(drive, "status error", stat); | |
587 | return 1; | |
588 | } | |
589 | ||
590 | EXPORT_SYMBOL(ide_wait_stat); | |
591 | ||
592 | /* | |
593 | * All hosts that use the 80c ribbon must use! | |
594 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
595 | */ | |
596 | u8 eighty_ninty_three (ide_drive_t *drive) | |
597 | { | |
d7d7634c AC |
598 | if(HWIF(drive)->udma_four == 0) |
599 | return 0; | |
600 | if (!(drive->id->hw_config & 0x6000)) | |
1da177e4 | 601 | return 0; |
1da177e4 | 602 | #ifndef CONFIG_IDEDMA_IVB |
d7d7634c AC |
603 | if(!(drive->id->hw_config & 0x4000)) |
604 | return 0; | |
1da177e4 | 605 | #endif /* CONFIG_IDEDMA_IVB */ |
d7d7634c | 606 | return 1; |
1da177e4 LT |
607 | } |
608 | ||
609 | EXPORT_SYMBOL(eighty_ninty_three); | |
610 | ||
611 | int ide_ata66_check (ide_drive_t *drive, ide_task_t *args) | |
612 | { | |
613 | if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) && | |
614 | (args->tfRegister[IDE_SECTOR_OFFSET] > XFER_UDMA_2) && | |
615 | (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER)) { | |
616 | #ifndef CONFIG_IDEDMA_IVB | |
617 | if ((drive->id->hw_config & 0x6000) == 0) { | |
618 | #else /* !CONFIG_IDEDMA_IVB */ | |
619 | if (((drive->id->hw_config & 0x2000) == 0) || | |
620 | ((drive->id->hw_config & 0x4000) == 0)) { | |
621 | #endif /* CONFIG_IDEDMA_IVB */ | |
622 | printk("%s: Speed warnings UDMA 3/4/5 is not " | |
623 | "functional.\n", drive->name); | |
624 | return 1; | |
625 | } | |
626 | if (!HWIF(drive)->udma_four) { | |
627 | printk("%s: Speed warnings UDMA 3/4/5 is not " | |
628 | "functional.\n", | |
629 | HWIF(drive)->name); | |
630 | return 1; | |
631 | } | |
632 | } | |
633 | return 0; | |
634 | } | |
635 | ||
636 | /* | |
637 | * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER. | |
638 | * 1 : Safe to update drive->id DMA registers. | |
639 | * 0 : OOPs not allowed. | |
640 | */ | |
641 | int set_transfer (ide_drive_t *drive, ide_task_t *args) | |
642 | { | |
643 | if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) && | |
644 | (args->tfRegister[IDE_SECTOR_OFFSET] >= XFER_SW_DMA_0) && | |
645 | (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER) && | |
646 | (drive->id->dma_ultra || | |
647 | drive->id->dma_mword || | |
648 | drive->id->dma_1word)) | |
649 | return 1; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
655 | static u8 ide_auto_reduce_xfer (ide_drive_t *drive) | |
656 | { | |
657 | if (!drive->crc_count) | |
658 | return drive->current_speed; | |
659 | drive->crc_count = 0; | |
660 | ||
661 | switch(drive->current_speed) { | |
662 | case XFER_UDMA_7: return XFER_UDMA_6; | |
663 | case XFER_UDMA_6: return XFER_UDMA_5; | |
664 | case XFER_UDMA_5: return XFER_UDMA_4; | |
665 | case XFER_UDMA_4: return XFER_UDMA_3; | |
666 | case XFER_UDMA_3: return XFER_UDMA_2; | |
667 | case XFER_UDMA_2: return XFER_UDMA_1; | |
668 | case XFER_UDMA_1: return XFER_UDMA_0; | |
669 | /* | |
670 | * OOPS we do not goto non Ultra DMA modes | |
671 | * without iCRC's available we force | |
672 | * the system to PIO and make the user | |
673 | * invoke the ATA-1 ATA-2 DMA modes. | |
674 | */ | |
675 | case XFER_UDMA_0: | |
676 | default: return XFER_PIO_4; | |
677 | } | |
678 | } | |
679 | #endif /* CONFIG_BLK_DEV_IDEDMA */ | |
680 | ||
681 | /* | |
682 | * Update the | |
683 | */ | |
684 | int ide_driveid_update (ide_drive_t *drive) | |
685 | { | |
686 | ide_hwif_t *hwif = HWIF(drive); | |
687 | struct hd_driveid *id; | |
688 | #if 0 | |
689 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
690 | if (!id) | |
691 | return 0; | |
692 | ||
693 | taskfile_lib_get_identify(drive, (char *)&id); | |
694 | ||
695 | ide_fix_driveid(id); | |
696 | if (id) { | |
697 | drive->id->dma_ultra = id->dma_ultra; | |
698 | drive->id->dma_mword = id->dma_mword; | |
699 | drive->id->dma_1word = id->dma_1word; | |
700 | /* anything more ? */ | |
701 | kfree(id); | |
702 | } | |
703 | return 1; | |
704 | #else | |
705 | /* | |
706 | * Re-read drive->id for possible DMA mode | |
707 | * change (copied from ide-probe.c) | |
708 | */ | |
709 | unsigned long timeout, flags; | |
710 | ||
711 | SELECT_MASK(drive, 1); | |
712 | if (IDE_CONTROL_REG) | |
713 | hwif->OUTB(drive->ctl,IDE_CONTROL_REG); | |
714 | msleep(50); | |
715 | hwif->OUTB(WIN_IDENTIFY, IDE_COMMAND_REG); | |
716 | timeout = jiffies + WAIT_WORSTCASE; | |
717 | do { | |
718 | if (time_after(jiffies, timeout)) { | |
719 | SELECT_MASK(drive, 0); | |
720 | return 0; /* drive timed-out */ | |
721 | } | |
722 | msleep(50); /* give drive a breather */ | |
723 | } while (hwif->INB(IDE_ALTSTATUS_REG) & BUSY_STAT); | |
724 | msleep(50); /* wait for IRQ and DRQ_STAT */ | |
725 | if (!OK_STAT(hwif->INB(IDE_STATUS_REG),DRQ_STAT,BAD_R_STAT)) { | |
726 | SELECT_MASK(drive, 0); | |
727 | printk("%s: CHECK for good STATUS\n", drive->name); | |
728 | return 0; | |
729 | } | |
730 | local_irq_save(flags); | |
731 | SELECT_MASK(drive, 0); | |
732 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
733 | if (!id) { | |
734 | local_irq_restore(flags); | |
735 | return 0; | |
736 | } | |
737 | ata_input_data(drive, id, SECTOR_WORDS); | |
738 | (void) hwif->INB(IDE_STATUS_REG); /* clear drive IRQ */ | |
739 | local_irq_enable(); | |
740 | local_irq_restore(flags); | |
741 | ide_fix_driveid(id); | |
742 | if (id) { | |
743 | drive->id->dma_ultra = id->dma_ultra; | |
744 | drive->id->dma_mword = id->dma_mword; | |
745 | drive->id->dma_1word = id->dma_1word; | |
746 | /* anything more ? */ | |
747 | kfree(id); | |
748 | } | |
749 | ||
750 | return 1; | |
751 | #endif | |
752 | } | |
753 | ||
754 | /* | |
755 | * Similar to ide_wait_stat(), except it never calls ide_error internally. | |
756 | * This is a kludge to handle the new ide_config_drive_speed() function, | |
757 | * and should not otherwise be used anywhere. Eventually, the tuneproc's | |
758 | * should be updated to return ide_startstop_t, in which case we can get | |
759 | * rid of this abomination again. :) -ml | |
760 | * | |
761 | * It is gone.......... | |
762 | * | |
763 | * const char *msg == consider adding for verbose errors. | |
764 | */ | |
765 | int ide_config_drive_speed (ide_drive_t *drive, u8 speed) | |
766 | { | |
767 | ide_hwif_t *hwif = HWIF(drive); | |
768 | int i, error = 1; | |
769 | u8 stat; | |
770 | ||
771 | // while (HWGROUP(drive)->busy) | |
772 | // msleep(50); | |
773 | ||
774 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
775 | if (hwif->ide_dma_check) /* check if host supports DMA */ | |
776 | hwif->ide_dma_host_off(drive); | |
777 | #endif | |
778 | ||
779 | /* | |
780 | * Don't use ide_wait_cmd here - it will | |
781 | * attempt to set_geometry and recalibrate, | |
782 | * but for some reason these don't work at | |
783 | * this point (lost interrupt). | |
784 | */ | |
785 | /* | |
786 | * Select the drive, and issue the SETFEATURES command | |
787 | */ | |
788 | disable_irq_nosync(hwif->irq); | |
789 | ||
790 | /* | |
791 | * FIXME: we race against the running IRQ here if | |
792 | * this is called from non IRQ context. If we use | |
793 | * disable_irq() we hang on the error path. Work | |
794 | * is needed. | |
795 | */ | |
796 | ||
797 | udelay(1); | |
798 | SELECT_DRIVE(drive); | |
799 | SELECT_MASK(drive, 0); | |
800 | udelay(1); | |
801 | if (IDE_CONTROL_REG) | |
802 | hwif->OUTB(drive->ctl | 2, IDE_CONTROL_REG); | |
803 | hwif->OUTB(speed, IDE_NSECTOR_REG); | |
804 | hwif->OUTB(SETFEATURES_XFER, IDE_FEATURE_REG); | |
805 | hwif->OUTB(WIN_SETFEATURES, IDE_COMMAND_REG); | |
806 | if ((IDE_CONTROL_REG) && (drive->quirk_list == 2)) | |
807 | hwif->OUTB(drive->ctl, IDE_CONTROL_REG); | |
808 | udelay(1); | |
809 | /* | |
810 | * Wait for drive to become non-BUSY | |
811 | */ | |
812 | if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { | |
813 | unsigned long flags, timeout; | |
814 | local_irq_set(flags); | |
815 | timeout = jiffies + WAIT_CMD; | |
816 | while ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) { | |
817 | if (time_after(jiffies, timeout)) | |
818 | break; | |
819 | } | |
820 | local_irq_restore(flags); | |
821 | } | |
822 | ||
823 | /* | |
824 | * Allow status to settle, then read it again. | |
825 | * A few rare drives vastly violate the 400ns spec here, | |
826 | * so we'll wait up to 10usec for a "good" status | |
827 | * rather than expensively fail things immediately. | |
828 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
829 | */ | |
830 | for (i = 0; i < 10; i++) { | |
831 | udelay(1); | |
832 | if (OK_STAT((stat = hwif->INB(IDE_STATUS_REG)), DRIVE_READY, BUSY_STAT|DRQ_STAT|ERR_STAT)) { | |
833 | error = 0; | |
834 | break; | |
835 | } | |
836 | } | |
837 | ||
838 | SELECT_MASK(drive, 0); | |
839 | ||
840 | enable_irq(hwif->irq); | |
841 | ||
842 | if (error) { | |
843 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
844 | return error; | |
845 | } | |
846 | ||
847 | drive->id->dma_ultra &= ~0xFF00; | |
848 | drive->id->dma_mword &= ~0x0F00; | |
849 | drive->id->dma_1word &= ~0x0F00; | |
850 | ||
851 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
852 | if (speed >= XFER_SW_DMA_0) | |
853 | hwif->ide_dma_host_on(drive); | |
854 | else if (hwif->ide_dma_check) /* check if host supports DMA */ | |
855 | hwif->ide_dma_off_quietly(drive); | |
856 | #endif | |
857 | ||
858 | switch(speed) { | |
859 | case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; | |
860 | case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; | |
861 | case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; | |
862 | case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; | |
863 | case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; | |
864 | case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; | |
865 | case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; | |
866 | case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; | |
867 | case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; | |
868 | case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; | |
869 | case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; | |
870 | case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; | |
871 | case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; | |
872 | case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; | |
873 | default: break; | |
874 | } | |
875 | if (!drive->init_speed) | |
876 | drive->init_speed = speed; | |
877 | drive->current_speed = speed; | |
878 | return error; | |
879 | } | |
880 | ||
881 | EXPORT_SYMBOL(ide_config_drive_speed); | |
882 | ||
883 | ||
884 | /* | |
885 | * This should get invoked any time we exit the driver to | |
886 | * wait for an interrupt response from a drive. handler() points | |
887 | * at the appropriate code to handle the next interrupt, and a | |
888 | * timer is started to prevent us from waiting forever in case | |
889 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
890 | * | |
891 | * See also ide_execute_command | |
892 | */ | |
893 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
894 | unsigned int timeout, ide_expiry_t *expiry) | |
895 | { | |
896 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
897 | ||
898 | if (hwgroup->handler != NULL) { | |
899 | printk(KERN_CRIT "%s: ide_set_handler: handler not null; " | |
900 | "old=%p, new=%p\n", | |
901 | drive->name, hwgroup->handler, handler); | |
902 | } | |
903 | hwgroup->handler = handler; | |
904 | hwgroup->expiry = expiry; | |
905 | hwgroup->timer.expires = jiffies + timeout; | |
906 | add_timer(&hwgroup->timer); | |
907 | } | |
908 | ||
909 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
910 | unsigned int timeout, ide_expiry_t *expiry) | |
911 | { | |
912 | unsigned long flags; | |
913 | spin_lock_irqsave(&ide_lock, flags); | |
914 | __ide_set_handler(drive, handler, timeout, expiry); | |
915 | spin_unlock_irqrestore(&ide_lock, flags); | |
916 | } | |
917 | ||
918 | EXPORT_SYMBOL(ide_set_handler); | |
919 | ||
920 | /** | |
921 | * ide_execute_command - execute an IDE command | |
922 | * @drive: IDE drive to issue the command against | |
923 | * @command: command byte to write | |
924 | * @handler: handler for next phase | |
925 | * @timeout: timeout for command | |
926 | * @expiry: handler to run on timeout | |
927 | * | |
928 | * Helper function to issue an IDE command. This handles the | |
929 | * atomicity requirements, command timing and ensures that the | |
930 | * handler and IRQ setup do not race. All IDE command kick off | |
931 | * should go via this function or do equivalent locking. | |
932 | */ | |
933 | ||
934 | void ide_execute_command(ide_drive_t *drive, task_ioreg_t cmd, ide_handler_t *handler, unsigned timeout, ide_expiry_t *expiry) | |
935 | { | |
936 | unsigned long flags; | |
937 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
938 | ide_hwif_t *hwif = HWIF(drive); | |
939 | ||
940 | spin_lock_irqsave(&ide_lock, flags); | |
941 | ||
942 | if(hwgroup->handler) | |
943 | BUG(); | |
944 | hwgroup->handler = handler; | |
945 | hwgroup->expiry = expiry; | |
946 | hwgroup->timer.expires = jiffies + timeout; | |
947 | add_timer(&hwgroup->timer); | |
948 | hwif->OUTBSYNC(drive, cmd, IDE_COMMAND_REG); | |
949 | /* Drive takes 400nS to respond, we must avoid the IRQ being | |
950 | serviced before that. | |
951 | ||
952 | FIXME: we could skip this delay with care on non shared | |
953 | devices | |
954 | */ | |
955 | ndelay(400); | |
956 | spin_unlock_irqrestore(&ide_lock, flags); | |
957 | } | |
958 | ||
959 | EXPORT_SYMBOL(ide_execute_command); | |
960 | ||
961 | ||
962 | /* needed below */ | |
963 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
964 | ||
965 | /* | |
966 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
967 | * during an atapi drive reset operation. If the drive has not yet responded, | |
968 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
969 | * for another 50ms. | |
970 | */ | |
971 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
972 | { | |
973 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
974 | ide_hwif_t *hwif = HWIF(drive); | |
975 | u8 stat; | |
976 | ||
977 | SELECT_DRIVE(drive); | |
978 | udelay (10); | |
979 | ||
980 | if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) { | |
981 | printk("%s: ATAPI reset complete\n", drive->name); | |
982 | } else { | |
983 | if (time_before(jiffies, hwgroup->poll_timeout)) { | |
984 | if (HWGROUP(drive)->handler != NULL) | |
985 | BUG(); | |
986 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
987 | /* continue polling */ | |
988 | return ide_started; | |
989 | } | |
990 | /* end of polling */ | |
991 | hwgroup->polling = 0; | |
992 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
993 | drive->name, stat); | |
994 | /* do it the old fashioned way */ | |
995 | return do_reset1(drive, 1); | |
996 | } | |
997 | /* done polling */ | |
998 | hwgroup->polling = 0; | |
999 | return ide_stopped; | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
1004 | * during an ide reset operation. If the drives have not yet responded, | |
1005 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
1006 | * for another 50ms. | |
1007 | */ | |
1008 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
1009 | { | |
1010 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1011 | ide_hwif_t *hwif = HWIF(drive); | |
1012 | u8 tmp; | |
1013 | ||
1014 | if (hwif->reset_poll != NULL) { | |
1015 | if (hwif->reset_poll(drive)) { | |
1016 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", | |
1017 | hwif->name, drive->name); | |
1018 | return ide_stopped; | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | if (!OK_STAT(tmp = hwif->INB(IDE_STATUS_REG), 0, BUSY_STAT)) { | |
1023 | if (time_before(jiffies, hwgroup->poll_timeout)) { | |
1024 | if (HWGROUP(drive)->handler != NULL) | |
1025 | BUG(); | |
1026 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1027 | /* continue polling */ | |
1028 | return ide_started; | |
1029 | } | |
1030 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
1031 | drive->failures++; | |
1032 | } else { | |
1033 | printk("%s: reset: ", hwif->name); | |
1034 | if ((tmp = hwif->INB(IDE_ERROR_REG)) == 1) { | |
1035 | printk("success\n"); | |
1036 | drive->failures = 0; | |
1037 | } else { | |
1038 | drive->failures++; | |
1039 | printk("master: "); | |
1040 | switch (tmp & 0x7f) { | |
1041 | case 1: printk("passed"); | |
1042 | break; | |
1043 | case 2: printk("formatter device error"); | |
1044 | break; | |
1045 | case 3: printk("sector buffer error"); | |
1046 | break; | |
1047 | case 4: printk("ECC circuitry error"); | |
1048 | break; | |
1049 | case 5: printk("controlling MPU error"); | |
1050 | break; | |
1051 | default:printk("error (0x%02x?)", tmp); | |
1052 | } | |
1053 | if (tmp & 0x80) | |
1054 | printk("; slave: failed"); | |
1055 | printk("\n"); | |
1056 | } | |
1057 | } | |
1058 | hwgroup->polling = 0; /* done polling */ | |
1059 | return ide_stopped; | |
1060 | } | |
1061 | ||
1062 | static void check_dma_crc(ide_drive_t *drive) | |
1063 | { | |
1064 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
1065 | if (drive->crc_count) { | |
1066 | (void) HWIF(drive)->ide_dma_off_quietly(drive); | |
1067 | ide_set_xfer_rate(drive, ide_auto_reduce_xfer(drive)); | |
1068 | if (drive->current_speed >= XFER_SW_DMA_0) | |
1069 | (void) HWIF(drive)->ide_dma_on(drive); | |
1070 | } else | |
1071 | (void)__ide_dma_off(drive); | |
1072 | #endif | |
1073 | } | |
1074 | ||
1075 | static void ide_disk_pre_reset(ide_drive_t *drive) | |
1076 | { | |
1077 | int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; | |
1078 | ||
1079 | drive->special.all = 0; | |
1080 | drive->special.b.set_geometry = legacy; | |
1081 | drive->special.b.recalibrate = legacy; | |
1082 | if (OK_TO_RESET_CONTROLLER) | |
1083 | drive->mult_count = 0; | |
1084 | if (!drive->keep_settings && !drive->using_dma) | |
1085 | drive->mult_req = 0; | |
1086 | if (drive->mult_req != drive->mult_count) | |
1087 | drive->special.b.set_multmode = 1; | |
1088 | } | |
1089 | ||
1090 | static void pre_reset(ide_drive_t *drive) | |
1091 | { | |
1092 | if (drive->media == ide_disk) | |
1093 | ide_disk_pre_reset(drive); | |
1094 | else | |
1095 | drive->post_reset = 1; | |
1096 | ||
1097 | if (!drive->keep_settings) { | |
1098 | if (drive->using_dma) { | |
1099 | check_dma_crc(drive); | |
1100 | } else { | |
1101 | drive->unmask = 0; | |
1102 | drive->io_32bit = 0; | |
1103 | } | |
1104 | return; | |
1105 | } | |
1106 | if (drive->using_dma) | |
1107 | check_dma_crc(drive); | |
1108 | ||
1109 | if (HWIF(drive)->pre_reset != NULL) | |
1110 | HWIF(drive)->pre_reset(drive); | |
1111 | ||
1112 | } | |
1113 | ||
1114 | /* | |
1115 | * do_reset1() attempts to recover a confused drive by resetting it. | |
1116 | * Unfortunately, resetting a disk drive actually resets all devices on | |
1117 | * the same interface, so it can really be thought of as resetting the | |
1118 | * interface rather than resetting the drive. | |
1119 | * | |
1120 | * ATAPI devices have their own reset mechanism which allows them to be | |
1121 | * individually reset without clobbering other devices on the same interface. | |
1122 | * | |
1123 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1124 | * us know when the reset operation has finished, so we must poll for this. | |
1125 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1126 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1127 | * we set a timer to poll at 50ms intervals. | |
1128 | */ | |
1129 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1130 | { | |
1131 | unsigned int unit; | |
1132 | unsigned long flags; | |
1133 | ide_hwif_t *hwif; | |
1134 | ide_hwgroup_t *hwgroup; | |
1135 | ||
1136 | spin_lock_irqsave(&ide_lock, flags); | |
1137 | hwif = HWIF(drive); | |
1138 | hwgroup = HWGROUP(drive); | |
1139 | ||
1140 | /* We must not reset with running handlers */ | |
1141 | if(hwgroup->handler != NULL) | |
1142 | BUG(); | |
1143 | ||
1144 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1145 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
1146 | pre_reset(drive); | |
1147 | SELECT_DRIVE(drive); | |
1148 | udelay (20); | |
68ad9910 AC |
1149 | hwif->OUTBSYNC(drive, WIN_SRST, IDE_COMMAND_REG); |
1150 | ndelay(400); | |
1da177e4 LT |
1151 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1152 | hwgroup->polling = 1; | |
1153 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1154 | spin_unlock_irqrestore(&ide_lock, flags); | |
1155 | return ide_started; | |
1156 | } | |
1157 | ||
1158 | /* | |
1159 | * First, reset any device state data we were maintaining | |
1160 | * for any of the drives on this interface. | |
1161 | */ | |
1162 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1163 | pre_reset(&hwif->drives[unit]); | |
1164 | ||
1165 | #if OK_TO_RESET_CONTROLLER | |
1166 | if (!IDE_CONTROL_REG) { | |
1167 | spin_unlock_irqrestore(&ide_lock, flags); | |
1168 | return ide_stopped; | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | * Note that we also set nIEN while resetting the device, | |
1173 | * to mask unwanted interrupts from the interface during the reset. | |
1174 | * However, due to the design of PC hardware, this will cause an | |
1175 | * immediate interrupt due to the edge transition it produces. | |
1176 | * This single interrupt gives us a "fast poll" for drives that | |
1177 | * recover from reset very quickly, saving us the first 50ms wait time. | |
1178 | */ | |
1179 | /* set SRST and nIEN */ | |
1180 | hwif->OUTBSYNC(drive, drive->ctl|6,IDE_CONTROL_REG); | |
1181 | /* more than enough time */ | |
1182 | udelay(10); | |
1183 | if (drive->quirk_list == 2) { | |
1184 | /* clear SRST and nIEN */ | |
1185 | hwif->OUTBSYNC(drive, drive->ctl, IDE_CONTROL_REG); | |
1186 | } else { | |
1187 | /* clear SRST, leave nIEN */ | |
1188 | hwif->OUTBSYNC(drive, drive->ctl|2, IDE_CONTROL_REG); | |
1189 | } | |
1190 | /* more than enough time */ | |
1191 | udelay(10); | |
1192 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1193 | hwgroup->polling = 1; | |
1194 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1195 | ||
1196 | /* | |
1197 | * Some weird controller like resetting themselves to a strange | |
1198 | * state when the disks are reset this way. At least, the Winbond | |
1199 | * 553 documentation says that | |
1200 | */ | |
1201 | if (hwif->resetproc != NULL) { | |
1202 | hwif->resetproc(drive); | |
1203 | } | |
1204 | ||
1205 | #endif /* OK_TO_RESET_CONTROLLER */ | |
1206 | ||
1207 | spin_unlock_irqrestore(&ide_lock, flags); | |
1208 | return ide_started; | |
1209 | } | |
1210 | ||
1211 | /* | |
1212 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1213 | */ | |
1214 | ||
1215 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1216 | { | |
1217 | return do_reset1(drive, 0); | |
1218 | } | |
1219 | ||
1220 | EXPORT_SYMBOL(ide_do_reset); | |
1221 | ||
1222 | /* | |
1223 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
1224 | * to report a non-busy status, see comments in probe_hwif(). | |
1225 | */ | |
1226 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1227 | { | |
1228 | u8 stat = 0; | |
1229 | ||
1230 | while(timeout--) { | |
1231 | /* | |
1232 | * Turn this into a schedule() sleep once I'm sure | |
1233 | * about locking issues (2.5 work ?). | |
1234 | */ | |
1235 | mdelay(1); | |
1236 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); | |
1237 | if ((stat & BUSY_STAT) == 0) | |
1238 | return 0; | |
1239 | /* | |
1240 | * Assume a value of 0xff means nothing is connected to | |
1241 | * the interface and it doesn't implement the pull-down | |
1242 | * resistor on D7. | |
1243 | */ | |
1244 | if (stat == 0xff) | |
1245 | return -ENODEV; | |
6842f8c8 | 1246 | touch_softlockup_watchdog(); |
1da177e4 LT |
1247 | } |
1248 | return -EBUSY; | |
1249 | } | |
1250 | ||
1251 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1252 |