Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> |
3 | * Copyright (C) 2003 Red Hat <alan@redhat.com> | |
4 | * | |
5 | */ | |
6 | ||
1da177e4 LT |
7 | #include <linux/module.h> |
8 | #include <linux/types.h> | |
9 | #include <linux/string.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/timer.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/interrupt.h> | |
14 | #include <linux/major.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/genhd.h> | |
17 | #include <linux/blkpg.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/pci.h> | |
20 | #include <linux/delay.h> | |
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 | 161 | ide_hwif_t *hwif = drive->hwif; |
ac95beed | 162 | const struct ide_port_ops *port_ops = hwif->port_ops; |
23579a2a | 163 | |
ac95beed BZ |
164 | if (port_ops && port_ops->selectproc) |
165 | port_ops->selectproc(drive); | |
23579a2a | 166 | |
4c3032d8 | 167 | hwif->OUTB(drive->select.all, hwif->io_ports.device_addr); |
1da177e4 LT |
168 | } |
169 | ||
1da177e4 LT |
170 | void SELECT_MASK (ide_drive_t *drive, int mask) |
171 | { | |
ac95beed BZ |
172 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
173 | ||
174 | if (port_ops && port_ops->maskproc) | |
175 | port_ops->maskproc(drive, mask); | |
1da177e4 LT |
176 | } |
177 | ||
1da177e4 LT |
178 | /* |
179 | * Some localbus EIDE interfaces require a special access sequence | |
180 | * when using 32-bit I/O instructions to transfer data. We call this | |
181 | * the "vlb_sync" sequence, which consists of three successive reads | |
182 | * of the sector count register location, with interrupts disabled | |
183 | * to ensure that the reads all happen together. | |
184 | */ | |
185 | static void ata_vlb_sync(ide_drive_t *drive, unsigned long port) | |
186 | { | |
187 | (void) HWIF(drive)->INB(port); | |
188 | (void) HWIF(drive)->INB(port); | |
189 | (void) HWIF(drive)->INB(port); | |
190 | } | |
191 | ||
192 | /* | |
193 | * This is used for most PIO data transfers *from* the IDE interface | |
194 | */ | |
92d3ab27 BZ |
195 | static void ata_input_data(ide_drive_t *drive, struct request *rq, |
196 | void *buffer, u32 wcount) | |
1da177e4 | 197 | { |
4c3032d8 BZ |
198 | ide_hwif_t *hwif = drive->hwif; |
199 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
200 | u8 io_32bit = drive->io_32bit; | |
1da177e4 LT |
201 | |
202 | if (io_32bit) { | |
203 | if (io_32bit & 2) { | |
204 | unsigned long flags; | |
23579a2a | 205 | |
1da177e4 | 206 | local_irq_save(flags); |
4c3032d8 BZ |
207 | ata_vlb_sync(drive, io_ports->nsect_addr); |
208 | hwif->INSL(io_ports->data_addr, buffer, wcount); | |
1da177e4 LT |
209 | local_irq_restore(flags); |
210 | } else | |
4c3032d8 | 211 | hwif->INSL(io_ports->data_addr, buffer, wcount); |
23579a2a | 212 | } else |
4c3032d8 | 213 | hwif->INSW(io_ports->data_addr, buffer, wcount << 1); |
1da177e4 LT |
214 | } |
215 | ||
216 | /* | |
217 | * This is used for most PIO data transfers *to* the IDE interface | |
218 | */ | |
92d3ab27 BZ |
219 | static void ata_output_data(ide_drive_t *drive, struct request *rq, |
220 | void *buffer, u32 wcount) | |
1da177e4 | 221 | { |
4c3032d8 BZ |
222 | ide_hwif_t *hwif = drive->hwif; |
223 | struct ide_io_ports *io_ports = &hwif->io_ports; | |
224 | u8 io_32bit = drive->io_32bit; | |
1da177e4 LT |
225 | |
226 | if (io_32bit) { | |
227 | if (io_32bit & 2) { | |
228 | unsigned long flags; | |
23579a2a | 229 | |
1da177e4 | 230 | local_irq_save(flags); |
4c3032d8 BZ |
231 | ata_vlb_sync(drive, io_ports->nsect_addr); |
232 | hwif->OUTSL(io_ports->data_addr, buffer, wcount); | |
1da177e4 LT |
233 | local_irq_restore(flags); |
234 | } else | |
4c3032d8 | 235 | hwif->OUTSL(io_ports->data_addr, buffer, wcount); |
23579a2a | 236 | } else |
4c3032d8 | 237 | hwif->OUTSW(io_ports->data_addr, buffer, wcount << 1); |
1da177e4 LT |
238 | } |
239 | ||
240 | /* | |
241 | * The following routines are mainly used by the ATAPI drivers. | |
242 | * | |
243 | * These routines will round up any request for an odd number of bytes, | |
244 | * so if an odd bytecount is specified, be sure that there's at least one | |
245 | * extra byte allocated for the buffer. | |
246 | */ | |
247 | ||
248 | static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) | |
249 | { | |
250 | ide_hwif_t *hwif = HWIF(drive); | |
251 | ||
252 | ++bytecount; | |
92d3ab27 | 253 | hwif->ata_input_data(drive, NULL, buffer, bytecount / 4); |
1da177e4 | 254 | if ((bytecount & 0x03) >= 2) |
4c3032d8 | 255 | hwif->INSW(hwif->io_ports.data_addr, |
23579a2a | 256 | (u8 *)buffer + (bytecount & ~0x03), 1); |
1da177e4 LT |
257 | } |
258 | ||
259 | static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount) | |
260 | { | |
261 | ide_hwif_t *hwif = HWIF(drive); | |
262 | ||
263 | ++bytecount; | |
92d3ab27 | 264 | hwif->ata_output_data(drive, NULL, buffer, bytecount / 4); |
1da177e4 | 265 | if ((bytecount & 0x03) >= 2) |
4c3032d8 | 266 | hwif->OUTSW(hwif->io_ports.data_addr, |
23579a2a | 267 | (u8 *)buffer + (bytecount & ~0x03), 1); |
1da177e4 LT |
268 | } |
269 | ||
270 | void default_hwif_transport(ide_hwif_t *hwif) | |
271 | { | |
272 | hwif->ata_input_data = ata_input_data; | |
273 | hwif->ata_output_data = ata_output_data; | |
274 | hwif->atapi_input_bytes = atapi_input_bytes; | |
275 | hwif->atapi_output_bytes = atapi_output_bytes; | |
276 | } | |
277 | ||
1da177e4 LT |
278 | void ide_fix_driveid (struct hd_driveid *id) |
279 | { | |
280 | #ifndef __LITTLE_ENDIAN | |
281 | # ifdef __BIG_ENDIAN | |
282 | int i; | |
283 | u16 *stringcast; | |
284 | ||
285 | id->config = __le16_to_cpu(id->config); | |
286 | id->cyls = __le16_to_cpu(id->cyls); | |
287 | id->reserved2 = __le16_to_cpu(id->reserved2); | |
288 | id->heads = __le16_to_cpu(id->heads); | |
289 | id->track_bytes = __le16_to_cpu(id->track_bytes); | |
290 | id->sector_bytes = __le16_to_cpu(id->sector_bytes); | |
291 | id->sectors = __le16_to_cpu(id->sectors); | |
292 | id->vendor0 = __le16_to_cpu(id->vendor0); | |
293 | id->vendor1 = __le16_to_cpu(id->vendor1); | |
294 | id->vendor2 = __le16_to_cpu(id->vendor2); | |
295 | stringcast = (u16 *)&id->serial_no[0]; | |
296 | for (i = 0; i < (20/2); i++) | |
297 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
298 | id->buf_type = __le16_to_cpu(id->buf_type); | |
299 | id->buf_size = __le16_to_cpu(id->buf_size); | |
300 | id->ecc_bytes = __le16_to_cpu(id->ecc_bytes); | |
301 | stringcast = (u16 *)&id->fw_rev[0]; | |
302 | for (i = 0; i < (8/2); i++) | |
303 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
304 | stringcast = (u16 *)&id->model[0]; | |
305 | for (i = 0; i < (40/2); i++) | |
306 | stringcast[i] = __le16_to_cpu(stringcast[i]); | |
307 | id->dword_io = __le16_to_cpu(id->dword_io); | |
308 | id->reserved50 = __le16_to_cpu(id->reserved50); | |
309 | id->field_valid = __le16_to_cpu(id->field_valid); | |
310 | id->cur_cyls = __le16_to_cpu(id->cur_cyls); | |
311 | id->cur_heads = __le16_to_cpu(id->cur_heads); | |
312 | id->cur_sectors = __le16_to_cpu(id->cur_sectors); | |
313 | id->cur_capacity0 = __le16_to_cpu(id->cur_capacity0); | |
314 | id->cur_capacity1 = __le16_to_cpu(id->cur_capacity1); | |
315 | id->lba_capacity = __le32_to_cpu(id->lba_capacity); | |
316 | id->dma_1word = __le16_to_cpu(id->dma_1word); | |
317 | id->dma_mword = __le16_to_cpu(id->dma_mword); | |
318 | id->eide_pio_modes = __le16_to_cpu(id->eide_pio_modes); | |
319 | id->eide_dma_min = __le16_to_cpu(id->eide_dma_min); | |
320 | id->eide_dma_time = __le16_to_cpu(id->eide_dma_time); | |
321 | id->eide_pio = __le16_to_cpu(id->eide_pio); | |
322 | id->eide_pio_iordy = __le16_to_cpu(id->eide_pio_iordy); | |
323 | for (i = 0; i < 2; ++i) | |
324 | id->words69_70[i] = __le16_to_cpu(id->words69_70[i]); | |
325 | for (i = 0; i < 4; ++i) | |
326 | id->words71_74[i] = __le16_to_cpu(id->words71_74[i]); | |
327 | id->queue_depth = __le16_to_cpu(id->queue_depth); | |
328 | for (i = 0; i < 4; ++i) | |
329 | id->words76_79[i] = __le16_to_cpu(id->words76_79[i]); | |
330 | id->major_rev_num = __le16_to_cpu(id->major_rev_num); | |
331 | id->minor_rev_num = __le16_to_cpu(id->minor_rev_num); | |
332 | id->command_set_1 = __le16_to_cpu(id->command_set_1); | |
333 | id->command_set_2 = __le16_to_cpu(id->command_set_2); | |
334 | id->cfsse = __le16_to_cpu(id->cfsse); | |
335 | id->cfs_enable_1 = __le16_to_cpu(id->cfs_enable_1); | |
336 | id->cfs_enable_2 = __le16_to_cpu(id->cfs_enable_2); | |
337 | id->csf_default = __le16_to_cpu(id->csf_default); | |
338 | id->dma_ultra = __le16_to_cpu(id->dma_ultra); | |
339 | id->trseuc = __le16_to_cpu(id->trseuc); | |
340 | id->trsEuc = __le16_to_cpu(id->trsEuc); | |
341 | id->CurAPMvalues = __le16_to_cpu(id->CurAPMvalues); | |
342 | id->mprc = __le16_to_cpu(id->mprc); | |
343 | id->hw_config = __le16_to_cpu(id->hw_config); | |
344 | id->acoustic = __le16_to_cpu(id->acoustic); | |
345 | id->msrqs = __le16_to_cpu(id->msrqs); | |
346 | id->sxfert = __le16_to_cpu(id->sxfert); | |
347 | id->sal = __le16_to_cpu(id->sal); | |
348 | id->spg = __le32_to_cpu(id->spg); | |
349 | id->lba_capacity_2 = __le64_to_cpu(id->lba_capacity_2); | |
350 | for (i = 0; i < 22; i++) | |
351 | id->words104_125[i] = __le16_to_cpu(id->words104_125[i]); | |
352 | id->last_lun = __le16_to_cpu(id->last_lun); | |
353 | id->word127 = __le16_to_cpu(id->word127); | |
354 | id->dlf = __le16_to_cpu(id->dlf); | |
355 | id->csfo = __le16_to_cpu(id->csfo); | |
356 | for (i = 0; i < 26; i++) | |
357 | id->words130_155[i] = __le16_to_cpu(id->words130_155[i]); | |
358 | id->word156 = __le16_to_cpu(id->word156); | |
359 | for (i = 0; i < 3; i++) | |
360 | id->words157_159[i] = __le16_to_cpu(id->words157_159[i]); | |
361 | id->cfa_power = __le16_to_cpu(id->cfa_power); | |
362 | for (i = 0; i < 14; i++) | |
363 | id->words161_175[i] = __le16_to_cpu(id->words161_175[i]); | |
364 | for (i = 0; i < 31; i++) | |
365 | id->words176_205[i] = __le16_to_cpu(id->words176_205[i]); | |
366 | for (i = 0; i < 48; i++) | |
367 | id->words206_254[i] = __le16_to_cpu(id->words206_254[i]); | |
368 | id->integrity_word = __le16_to_cpu(id->integrity_word); | |
369 | # else | |
370 | # error "Please fix <asm/byteorder.h>" | |
371 | # endif | |
372 | #endif | |
373 | } | |
374 | ||
01745112 BZ |
375 | /* |
376 | * ide_fixstring() cleans up and (optionally) byte-swaps a text string, | |
377 | * removing leading/trailing blanks and compressing internal blanks. | |
378 | * It is primarily used to tidy up the model name/number fields as | |
379 | * returned by the WIN_[P]IDENTIFY commands. | |
380 | */ | |
381 | ||
1da177e4 LT |
382 | void ide_fixstring (u8 *s, const int bytecount, const int byteswap) |
383 | { | |
384 | u8 *p = s, *end = &s[bytecount & ~1]; /* bytecount must be even */ | |
385 | ||
386 | if (byteswap) { | |
387 | /* convert from big-endian to host byte order */ | |
388 | for (p = end ; p != s;) { | |
389 | unsigned short *pp = (unsigned short *) (p -= 2); | |
390 | *pp = ntohs(*pp); | |
391 | } | |
392 | } | |
393 | /* strip leading blanks */ | |
394 | while (s != end && *s == ' ') | |
395 | ++s; | |
396 | /* compress internal blanks and strip trailing blanks */ | |
397 | while (s != end && *s) { | |
398 | if (*s++ != ' ' || (s != end && *s && *s != ' ')) | |
399 | *p++ = *(s-1); | |
400 | } | |
401 | /* wipe out trailing garbage */ | |
402 | while (p != end) | |
403 | *p++ = '\0'; | |
404 | } | |
405 | ||
406 | EXPORT_SYMBOL(ide_fixstring); | |
407 | ||
408 | /* | |
409 | * Needed for PCI irq sharing | |
410 | */ | |
411 | int drive_is_ready (ide_drive_t *drive) | |
412 | { | |
413 | ide_hwif_t *hwif = HWIF(drive); | |
414 | u8 stat = 0; | |
415 | ||
416 | if (drive->waiting_for_dma) | |
5e37bdc0 | 417 | return hwif->dma_ops->dma_test_irq(drive); |
1da177e4 LT |
418 | |
419 | #if 0 | |
420 | /* need to guarantee 400ns since last command was issued */ | |
421 | udelay(1); | |
422 | #endif | |
423 | ||
1da177e4 LT |
424 | /* |
425 | * We do a passive status test under shared PCI interrupts on | |
426 | * cards that truly share the ATA side interrupt, but may also share | |
427 | * an interrupt with another pci card/device. We make no assumptions | |
428 | * about possible isa-pnp and pci-pnp issues yet. | |
429 | */ | |
4c3032d8 | 430 | if (hwif->io_ports.ctl_addr) |
c47137a9 | 431 | stat = ide_read_altstatus(drive); |
1da177e4 | 432 | else |
1da177e4 | 433 | /* Note: this may clear a pending IRQ!! */ |
c47137a9 | 434 | stat = ide_read_status(drive); |
1da177e4 LT |
435 | |
436 | if (stat & BUSY_STAT) | |
437 | /* drive busy: definitely not interrupting */ | |
438 | return 0; | |
439 | ||
440 | /* drive ready: *might* be interrupting */ | |
441 | return 1; | |
442 | } | |
443 | ||
444 | EXPORT_SYMBOL(drive_is_ready); | |
445 | ||
1da177e4 LT |
446 | /* |
447 | * This routine busy-waits for the drive status to be not "busy". | |
448 | * It then checks the status for all of the "good" bits and none | |
449 | * of the "bad" bits, and if all is okay it returns 0. All other | |
74af21cf | 450 | * cases return error -- caller may then invoke ide_error(). |
1da177e4 LT |
451 | * |
452 | * This routine should get fixed to not hog the cpu during extra long waits.. | |
453 | * That could be done by busy-waiting for the first jiffy or two, and then | |
454 | * setting a timer to wake up at half second intervals thereafter, | |
455 | * until timeout is achieved, before timing out. | |
456 | */ | |
aedea591 | 457 | static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout, u8 *rstat) |
1da177e4 | 458 | { |
1da177e4 | 459 | unsigned long flags; |
74af21cf BZ |
460 | int i; |
461 | u8 stat; | |
1da177e4 LT |
462 | |
463 | udelay(1); /* spec allows drive 400ns to assert "BUSY" */ | |
c47137a9 BZ |
464 | stat = ide_read_status(drive); |
465 | ||
466 | if (stat & BUSY_STAT) { | |
1da177e4 LT |
467 | local_irq_set(flags); |
468 | timeout += jiffies; | |
c47137a9 | 469 | while ((stat = ide_read_status(drive)) & BUSY_STAT) { |
1da177e4 LT |
470 | if (time_after(jiffies, timeout)) { |
471 | /* | |
472 | * One last read after the timeout in case | |
473 | * heavy interrupt load made us not make any | |
474 | * progress during the timeout.. | |
475 | */ | |
c47137a9 | 476 | stat = ide_read_status(drive); |
1da177e4 LT |
477 | if (!(stat & BUSY_STAT)) |
478 | break; | |
479 | ||
480 | local_irq_restore(flags); | |
74af21cf BZ |
481 | *rstat = stat; |
482 | return -EBUSY; | |
1da177e4 LT |
483 | } |
484 | } | |
485 | local_irq_restore(flags); | |
486 | } | |
487 | /* | |
488 | * Allow status to settle, then read it again. | |
489 | * A few rare drives vastly violate the 400ns spec here, | |
490 | * so we'll wait up to 10usec for a "good" status | |
491 | * rather than expensively fail things immediately. | |
492 | * This fix courtesy of Matthew Faupel & Niccolo Rigacci. | |
493 | */ | |
494 | for (i = 0; i < 10; i++) { | |
495 | udelay(1); | |
c47137a9 BZ |
496 | stat = ide_read_status(drive); |
497 | ||
498 | if (OK_STAT(stat, good, bad)) { | |
74af21cf | 499 | *rstat = stat; |
1da177e4 | 500 | return 0; |
74af21cf | 501 | } |
1da177e4 | 502 | } |
74af21cf BZ |
503 | *rstat = stat; |
504 | return -EFAULT; | |
505 | } | |
506 | ||
507 | /* | |
508 | * In case of error returns error value after doing "*startstop = ide_error()". | |
509 | * The caller should return the updated value of "startstop" in this case, | |
510 | * "startstop" is unchanged when the function returns 0. | |
511 | */ | |
512 | int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, u8 bad, unsigned long timeout) | |
513 | { | |
514 | int err; | |
515 | u8 stat; | |
516 | ||
517 | /* bail early if we've exceeded max_failures */ | |
518 | if (drive->max_failures && (drive->failures > drive->max_failures)) { | |
519 | *startstop = ide_stopped; | |
520 | return 1; | |
521 | } | |
522 | ||
523 | err = __ide_wait_stat(drive, good, bad, timeout, &stat); | |
524 | ||
525 | if (err) { | |
526 | char *s = (err == -EBUSY) ? "status timeout" : "status error"; | |
527 | *startstop = ide_error(drive, s, stat); | |
528 | } | |
529 | ||
530 | return err; | |
1da177e4 LT |
531 | } |
532 | ||
533 | EXPORT_SYMBOL(ide_wait_stat); | |
534 | ||
a5b7e70d BZ |
535 | /** |
536 | * ide_in_drive_list - look for drive in black/white list | |
537 | * @id: drive identifier | |
538 | * @drive_table: list to inspect | |
539 | * | |
540 | * Look for a drive in the blacklist and the whitelist tables | |
541 | * Returns 1 if the drive is found in the table. | |
542 | */ | |
543 | ||
544 | int ide_in_drive_list(struct hd_driveid *id, const struct drive_list_entry *drive_table) | |
545 | { | |
546 | for ( ; drive_table->id_model; drive_table++) | |
547 | if ((!strcmp(drive_table->id_model, id->model)) && | |
548 | (!drive_table->id_firmware || | |
549 | strstr(id->fw_rev, drive_table->id_firmware))) | |
550 | return 1; | |
551 | return 0; | |
552 | } | |
553 | ||
b0244a00 BZ |
554 | EXPORT_SYMBOL_GPL(ide_in_drive_list); |
555 | ||
a5b7e70d BZ |
556 | /* |
557 | * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. | |
558 | * We list them here and depend on the device side cable detection for them. | |
8588a2b7 BZ |
559 | * |
560 | * Some optical devices with the buggy firmwares have the same problem. | |
a5b7e70d BZ |
561 | */ |
562 | static const struct drive_list_entry ivb_list[] = { | |
563 | { "QUANTUM FIREBALLlct10 05" , "A03.0900" }, | |
8588a2b7 | 564 | { "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
e97564f3 PM |
565 | { "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
566 | { "TSSTcorp CDDVDW SH-S202N" , "SB00" }, | |
567 | { "TSSTcorp CDDVDW SH-S202N" , "SB01" }, | |
a5b7e70d BZ |
568 | { NULL , NULL } |
569 | }; | |
570 | ||
1da177e4 LT |
571 | /* |
572 | * All hosts that use the 80c ribbon must use! | |
573 | * The name is derived from upper byte of word 93 and the 80c ribbon. | |
574 | */ | |
575 | u8 eighty_ninty_three (ide_drive_t *drive) | |
576 | { | |
7f8f48af BZ |
577 | ide_hwif_t *hwif = drive->hwif; |
578 | struct hd_driveid *id = drive->id; | |
a5b7e70d | 579 | int ivb = ide_in_drive_list(id, ivb_list); |
7f8f48af | 580 | |
49521f97 BZ |
581 | if (hwif->cbl == ATA_CBL_PATA40_SHORT) |
582 | return 1; | |
583 | ||
a5b7e70d BZ |
584 | if (ivb) |
585 | printk(KERN_DEBUG "%s: skipping word 93 validity check\n", | |
586 | drive->name); | |
587 | ||
b98f8803 GK |
588 | if (ide_dev_is_sata(id) && !ivb) |
589 | return 1; | |
590 | ||
a5b7e70d | 591 | if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
7f8f48af | 592 | goto no_80w; |
1a1276e7 | 593 | |
f68d9320 BZ |
594 | /* |
595 | * FIXME: | |
f367bed0 | 596 | * - change master/slave IDENTIFY order |
a5b7e70d | 597 | * - force bit13 (80c cable present) check also for !ivb devices |
f68d9320 BZ |
598 | * (unless the slave device is pre-ATA3) |
599 | */ | |
a5b7e70d | 600 | if ((id->hw_config & 0x4000) || (ivb && (id->hw_config & 0x2000))) |
7f8f48af BZ |
601 | return 1; |
602 | ||
603 | no_80w: | |
604 | if (drive->udma33_warned == 1) | |
605 | return 0; | |
606 | ||
607 | printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " | |
608 | "limiting max speed to UDMA33\n", | |
49521f97 BZ |
609 | drive->name, |
610 | hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); | |
7f8f48af BZ |
611 | |
612 | drive->udma33_warned = 1; | |
613 | ||
614 | return 0; | |
1da177e4 LT |
615 | } |
616 | ||
8a455134 | 617 | int ide_driveid_update(ide_drive_t *drive) |
1da177e4 | 618 | { |
8a455134 | 619 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 620 | struct hd_driveid *id; |
8a455134 | 621 | unsigned long timeout, flags; |
c47137a9 | 622 | u8 stat; |
1da177e4 | 623 | |
1da177e4 LT |
624 | /* |
625 | * Re-read drive->id for possible DMA mode | |
626 | * change (copied from ide-probe.c) | |
627 | */ | |
1da177e4 LT |
628 | |
629 | SELECT_MASK(drive, 1); | |
81ca6919 | 630 | ide_set_irq(drive, 1); |
1da177e4 | 631 | msleep(50); |
4c3032d8 | 632 | hwif->OUTB(WIN_IDENTIFY, hwif->io_ports.command_addr); |
1da177e4 LT |
633 | timeout = jiffies + WAIT_WORSTCASE; |
634 | do { | |
635 | if (time_after(jiffies, timeout)) { | |
636 | SELECT_MASK(drive, 0); | |
637 | return 0; /* drive timed-out */ | |
638 | } | |
c47137a9 | 639 | |
1da177e4 | 640 | msleep(50); /* give drive a breather */ |
c47137a9 BZ |
641 | stat = ide_read_altstatus(drive); |
642 | } while (stat & BUSY_STAT); | |
643 | ||
1da177e4 | 644 | msleep(50); /* wait for IRQ and DRQ_STAT */ |
c47137a9 BZ |
645 | stat = ide_read_status(drive); |
646 | ||
647 | if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
648 | SELECT_MASK(drive, 0); |
649 | printk("%s: CHECK for good STATUS\n", drive->name); | |
650 | return 0; | |
651 | } | |
652 | local_irq_save(flags); | |
653 | SELECT_MASK(drive, 0); | |
654 | id = kmalloc(SECTOR_WORDS*4, GFP_ATOMIC); | |
655 | if (!id) { | |
656 | local_irq_restore(flags); | |
657 | return 0; | |
658 | } | |
92d3ab27 | 659 | hwif->ata_input_data(drive, NULL, id, SECTOR_WORDS); |
c47137a9 | 660 | (void)ide_read_status(drive); /* clear drive IRQ */ |
1da177e4 LT |
661 | local_irq_enable(); |
662 | local_irq_restore(flags); | |
663 | ide_fix_driveid(id); | |
664 | if (id) { | |
665 | drive->id->dma_ultra = id->dma_ultra; | |
666 | drive->id->dma_mword = id->dma_mword; | |
667 | drive->id->dma_1word = id->dma_1word; | |
668 | /* anything more ? */ | |
669 | kfree(id); | |
3ab7efe8 BZ |
670 | |
671 | if (drive->using_dma && ide_id_dma_bug(drive)) | |
672 | ide_dma_off(drive); | |
1da177e4 LT |
673 | } |
674 | ||
675 | return 1; | |
1da177e4 LT |
676 | } |
677 | ||
74af21cf | 678 | int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
1da177e4 | 679 | { |
74af21cf | 680 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 | 681 | struct ide_io_ports *io_ports = &hwif->io_ports; |
89613e66 | 682 | int error = 0; |
1da177e4 LT |
683 | u8 stat; |
684 | ||
685 | // while (HWGROUP(drive)->busy) | |
686 | // msleep(50); | |
687 | ||
688 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
5e37bdc0 BZ |
689 | if (hwif->dma_ops) /* check if host supports DMA */ |
690 | hwif->dma_ops->dma_host_set(drive, 0); | |
1da177e4 LT |
691 | #endif |
692 | ||
89613e66 SS |
693 | /* Skip setting PIO flow-control modes on pre-EIDE drives */ |
694 | if ((speed & 0xf8) == XFER_PIO_0 && !(drive->id->capability & 0x08)) | |
695 | goto skip; | |
696 | ||
1da177e4 LT |
697 | /* |
698 | * Don't use ide_wait_cmd here - it will | |
699 | * attempt to set_geometry and recalibrate, | |
700 | * but for some reason these don't work at | |
701 | * this point (lost interrupt). | |
702 | */ | |
703 | /* | |
704 | * Select the drive, and issue the SETFEATURES command | |
705 | */ | |
706 | disable_irq_nosync(hwif->irq); | |
707 | ||
708 | /* | |
709 | * FIXME: we race against the running IRQ here if | |
710 | * this is called from non IRQ context. If we use | |
711 | * disable_irq() we hang on the error path. Work | |
712 | * is needed. | |
713 | */ | |
714 | ||
715 | udelay(1); | |
716 | SELECT_DRIVE(drive); | |
717 | SELECT_MASK(drive, 0); | |
718 | udelay(1); | |
81ca6919 | 719 | ide_set_irq(drive, 0); |
4c3032d8 BZ |
720 | hwif->OUTB(speed, io_ports->nsect_addr); |
721 | hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr); | |
722 | hwif->OUTBSYNC(drive, WIN_SETFEATURES, io_ports->command_addr); | |
81ca6919 BZ |
723 | if (drive->quirk_list == 2) |
724 | ide_set_irq(drive, 1); | |
1da177e4 | 725 | |
74af21cf BZ |
726 | error = __ide_wait_stat(drive, drive->ready_stat, |
727 | BUSY_STAT|DRQ_STAT|ERR_STAT, | |
728 | WAIT_CMD, &stat); | |
1da177e4 LT |
729 | |
730 | SELECT_MASK(drive, 0); | |
731 | ||
732 | enable_irq(hwif->irq); | |
733 | ||
734 | if (error) { | |
735 | (void) ide_dump_status(drive, "set_drive_speed_status", stat); | |
736 | return error; | |
737 | } | |
738 | ||
739 | drive->id->dma_ultra &= ~0xFF00; | |
740 | drive->id->dma_mword &= ~0x0F00; | |
741 | drive->id->dma_1word &= ~0x0F00; | |
742 | ||
89613e66 | 743 | skip: |
1da177e4 | 744 | #ifdef CONFIG_BLK_DEV_IDEDMA |
f37aaf9e BZ |
745 | if ((speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA)) && |
746 | drive->using_dma) | |
5e37bdc0 BZ |
747 | hwif->dma_ops->dma_host_set(drive, 1); |
748 | else if (hwif->dma_ops) /* check if host supports DMA */ | |
4a546e04 | 749 | ide_dma_off_quietly(drive); |
1da177e4 LT |
750 | #endif |
751 | ||
752 | switch(speed) { | |
753 | case XFER_UDMA_7: drive->id->dma_ultra |= 0x8080; break; | |
754 | case XFER_UDMA_6: drive->id->dma_ultra |= 0x4040; break; | |
755 | case XFER_UDMA_5: drive->id->dma_ultra |= 0x2020; break; | |
756 | case XFER_UDMA_4: drive->id->dma_ultra |= 0x1010; break; | |
757 | case XFER_UDMA_3: drive->id->dma_ultra |= 0x0808; break; | |
758 | case XFER_UDMA_2: drive->id->dma_ultra |= 0x0404; break; | |
759 | case XFER_UDMA_1: drive->id->dma_ultra |= 0x0202; break; | |
760 | case XFER_UDMA_0: drive->id->dma_ultra |= 0x0101; break; | |
761 | case XFER_MW_DMA_2: drive->id->dma_mword |= 0x0404; break; | |
762 | case XFER_MW_DMA_1: drive->id->dma_mword |= 0x0202; break; | |
763 | case XFER_MW_DMA_0: drive->id->dma_mword |= 0x0101; break; | |
764 | case XFER_SW_DMA_2: drive->id->dma_1word |= 0x0404; break; | |
765 | case XFER_SW_DMA_1: drive->id->dma_1word |= 0x0202; break; | |
766 | case XFER_SW_DMA_0: drive->id->dma_1word |= 0x0101; break; | |
767 | default: break; | |
768 | } | |
769 | if (!drive->init_speed) | |
770 | drive->init_speed = speed; | |
771 | drive->current_speed = speed; | |
772 | return error; | |
773 | } | |
774 | ||
1da177e4 LT |
775 | /* |
776 | * This should get invoked any time we exit the driver to | |
777 | * wait for an interrupt response from a drive. handler() points | |
778 | * at the appropriate code to handle the next interrupt, and a | |
779 | * timer is started to prevent us from waiting forever in case | |
780 | * something goes wrong (see the ide_timer_expiry() handler later on). | |
781 | * | |
782 | * See also ide_execute_command | |
783 | */ | |
784 | static void __ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
785 | unsigned int timeout, ide_expiry_t *expiry) | |
786 | { | |
787 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
788 | ||
d30a426d | 789 | BUG_ON(hwgroup->handler); |
1da177e4 LT |
790 | hwgroup->handler = handler; |
791 | hwgroup->expiry = expiry; | |
792 | hwgroup->timer.expires = jiffies + timeout; | |
d30a426d | 793 | hwgroup->req_gen_timer = hwgroup->req_gen; |
1da177e4 LT |
794 | add_timer(&hwgroup->timer); |
795 | } | |
796 | ||
797 | void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, | |
798 | unsigned int timeout, ide_expiry_t *expiry) | |
799 | { | |
800 | unsigned long flags; | |
801 | spin_lock_irqsave(&ide_lock, flags); | |
802 | __ide_set_handler(drive, handler, timeout, expiry); | |
803 | spin_unlock_irqrestore(&ide_lock, flags); | |
804 | } | |
805 | ||
806 | EXPORT_SYMBOL(ide_set_handler); | |
807 | ||
808 | /** | |
809 | * ide_execute_command - execute an IDE command | |
810 | * @drive: IDE drive to issue the command against | |
811 | * @command: command byte to write | |
812 | * @handler: handler for next phase | |
813 | * @timeout: timeout for command | |
814 | * @expiry: handler to run on timeout | |
815 | * | |
816 | * Helper function to issue an IDE command. This handles the | |
817 | * atomicity requirements, command timing and ensures that the | |
818 | * handler and IRQ setup do not race. All IDE command kick off | |
819 | * should go via this function or do equivalent locking. | |
820 | */ | |
cd2a2d96 BZ |
821 | |
822 | void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler, | |
823 | unsigned timeout, ide_expiry_t *expiry) | |
1da177e4 LT |
824 | { |
825 | unsigned long flags; | |
1da177e4 | 826 | ide_hwif_t *hwif = HWIF(drive); |
629f944b | 827 | |
1da177e4 | 828 | spin_lock_irqsave(&ide_lock, flags); |
629f944b | 829 | __ide_set_handler(drive, handler, timeout, expiry); |
4c3032d8 | 830 | hwif->OUTBSYNC(drive, cmd, hwif->io_ports.command_addr); |
629f944b BZ |
831 | /* |
832 | * Drive takes 400nS to respond, we must avoid the IRQ being | |
833 | * serviced before that. | |
834 | * | |
835 | * FIXME: we could skip this delay with care on non shared devices | |
836 | */ | |
1da177e4 LT |
837 | ndelay(400); |
838 | spin_unlock_irqrestore(&ide_lock, flags); | |
839 | } | |
840 | ||
841 | EXPORT_SYMBOL(ide_execute_command); | |
842 | ||
843 | ||
844 | /* needed below */ | |
845 | static ide_startstop_t do_reset1 (ide_drive_t *, int); | |
846 | ||
847 | /* | |
848 | * atapi_reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
849 | * during an atapi drive reset operation. If the drive has not yet responded, | |
850 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
851 | * for another 50ms. | |
852 | */ | |
853 | static ide_startstop_t atapi_reset_pollfunc (ide_drive_t *drive) | |
854 | { | |
855 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1da177e4 LT |
856 | u8 stat; |
857 | ||
858 | SELECT_DRIVE(drive); | |
859 | udelay (10); | |
c47137a9 | 860 | stat = ide_read_status(drive); |
1da177e4 | 861 | |
c47137a9 | 862 | if (OK_STAT(stat, 0, BUSY_STAT)) |
1da177e4 | 863 | printk("%s: ATAPI reset complete\n", drive->name); |
c47137a9 | 864 | else { |
1da177e4 | 865 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
866 | ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); |
867 | /* continue polling */ | |
868 | return ide_started; | |
869 | } | |
870 | /* end of polling */ | |
871 | hwgroup->polling = 0; | |
872 | printk("%s: ATAPI reset timed-out, status=0x%02x\n", | |
873 | drive->name, stat); | |
874 | /* do it the old fashioned way */ | |
875 | return do_reset1(drive, 1); | |
876 | } | |
877 | /* done polling */ | |
878 | hwgroup->polling = 0; | |
913759ac | 879 | hwgroup->resetting = 0; |
1da177e4 LT |
880 | return ide_stopped; |
881 | } | |
882 | ||
883 | /* | |
884 | * reset_pollfunc() gets invoked to poll the interface for completion every 50ms | |
885 | * during an ide reset operation. If the drives have not yet responded, | |
886 | * and we have not yet hit our maximum waiting time, then the timer is restarted | |
887 | * for another 50ms. | |
888 | */ | |
889 | static ide_startstop_t reset_pollfunc (ide_drive_t *drive) | |
890 | { | |
891 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
892 | ide_hwif_t *hwif = HWIF(drive); | |
ac95beed | 893 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1da177e4 LT |
894 | u8 tmp; |
895 | ||
ac95beed BZ |
896 | if (port_ops && port_ops->reset_poll) { |
897 | if (port_ops->reset_poll(drive)) { | |
1da177e4 LT |
898 | printk(KERN_ERR "%s: host reset_poll failure for %s.\n", |
899 | hwif->name, drive->name); | |
900 | return ide_stopped; | |
901 | } | |
902 | } | |
903 | ||
c47137a9 BZ |
904 | tmp = ide_read_status(drive); |
905 | ||
906 | if (!OK_STAT(tmp, 0, BUSY_STAT)) { | |
1da177e4 | 907 | if (time_before(jiffies, hwgroup->poll_timeout)) { |
1da177e4 LT |
908 | ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); |
909 | /* continue polling */ | |
910 | return ide_started; | |
911 | } | |
912 | printk("%s: reset timed-out, status=0x%02x\n", hwif->name, tmp); | |
913 | drive->failures++; | |
914 | } else { | |
915 | printk("%s: reset: ", hwif->name); | |
64a57fe4 BZ |
916 | tmp = ide_read_error(drive); |
917 | ||
918 | if (tmp == 1) { | |
1da177e4 LT |
919 | printk("success\n"); |
920 | drive->failures = 0; | |
921 | } else { | |
922 | drive->failures++; | |
923 | printk("master: "); | |
924 | switch (tmp & 0x7f) { | |
925 | case 1: printk("passed"); | |
926 | break; | |
927 | case 2: printk("formatter device error"); | |
928 | break; | |
929 | case 3: printk("sector buffer error"); | |
930 | break; | |
931 | case 4: printk("ECC circuitry error"); | |
932 | break; | |
933 | case 5: printk("controlling MPU error"); | |
934 | break; | |
935 | default:printk("error (0x%02x?)", tmp); | |
936 | } | |
937 | if (tmp & 0x80) | |
938 | printk("; slave: failed"); | |
939 | printk("\n"); | |
940 | } | |
941 | } | |
942 | hwgroup->polling = 0; /* done polling */ | |
913759ac | 943 | hwgroup->resetting = 0; /* done reset attempt */ |
1da177e4 LT |
944 | return ide_stopped; |
945 | } | |
946 | ||
1da177e4 LT |
947 | static void ide_disk_pre_reset(ide_drive_t *drive) |
948 | { | |
949 | int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1; | |
950 | ||
951 | drive->special.all = 0; | |
952 | drive->special.b.set_geometry = legacy; | |
953 | drive->special.b.recalibrate = legacy; | |
4ee06b7e | 954 | drive->mult_count = 0; |
1da177e4 LT |
955 | if (!drive->keep_settings && !drive->using_dma) |
956 | drive->mult_req = 0; | |
957 | if (drive->mult_req != drive->mult_count) | |
958 | drive->special.b.set_multmode = 1; | |
959 | } | |
960 | ||
961 | static void pre_reset(ide_drive_t *drive) | |
962 | { | |
ac95beed BZ |
963 | const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
964 | ||
1da177e4 LT |
965 | if (drive->media == ide_disk) |
966 | ide_disk_pre_reset(drive); | |
967 | else | |
968 | drive->post_reset = 1; | |
969 | ||
99ffbe0e BZ |
970 | if (drive->using_dma) { |
971 | if (drive->crc_count) | |
578cfa0d | 972 | ide_check_dma_crc(drive); |
99ffbe0e BZ |
973 | else |
974 | ide_dma_off(drive); | |
975 | } | |
976 | ||
977 | if (!drive->keep_settings) { | |
978 | if (!drive->using_dma) { | |
1da177e4 LT |
979 | drive->unmask = 0; |
980 | drive->io_32bit = 0; | |
981 | } | |
982 | return; | |
983 | } | |
1da177e4 | 984 | |
ac95beed BZ |
985 | if (port_ops && port_ops->pre_reset) |
986 | port_ops->pre_reset(drive); | |
1da177e4 | 987 | |
513daadd SS |
988 | if (drive->current_speed != 0xff) |
989 | drive->desired_speed = drive->current_speed; | |
990 | drive->current_speed = 0xff; | |
1da177e4 LT |
991 | } |
992 | ||
993 | /* | |
994 | * do_reset1() attempts to recover a confused drive by resetting it. | |
995 | * Unfortunately, resetting a disk drive actually resets all devices on | |
996 | * the same interface, so it can really be thought of as resetting the | |
997 | * interface rather than resetting the drive. | |
998 | * | |
999 | * ATAPI devices have their own reset mechanism which allows them to be | |
1000 | * individually reset without clobbering other devices on the same interface. | |
1001 | * | |
1002 | * Unfortunately, the IDE interface does not generate an interrupt to let | |
1003 | * us know when the reset operation has finished, so we must poll for this. | |
1004 | * Equally poor, though, is the fact that this may a very long time to complete, | |
1005 | * (up to 30 seconds worstcase). So, instead of busy-waiting here for it, | |
1006 | * we set a timer to poll at 50ms intervals. | |
1007 | */ | |
1008 | static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi) | |
1009 | { | |
1010 | unsigned int unit; | |
1011 | unsigned long flags; | |
1012 | ide_hwif_t *hwif; | |
1013 | ide_hwgroup_t *hwgroup; | |
4c3032d8 | 1014 | struct ide_io_ports *io_ports; |
ac95beed | 1015 | const struct ide_port_ops *port_ops; |
23579a2a BZ |
1016 | u8 ctl; |
1017 | ||
1da177e4 LT |
1018 | spin_lock_irqsave(&ide_lock, flags); |
1019 | hwif = HWIF(drive); | |
1020 | hwgroup = HWGROUP(drive); | |
1021 | ||
4c3032d8 BZ |
1022 | io_ports = &hwif->io_ports; |
1023 | ||
1da177e4 | 1024 | /* We must not reset with running handlers */ |
125e1874 | 1025 | BUG_ON(hwgroup->handler != NULL); |
1da177e4 LT |
1026 | |
1027 | /* For an ATAPI device, first try an ATAPI SRST. */ | |
1028 | if (drive->media != ide_disk && !do_not_try_atapi) { | |
913759ac | 1029 | hwgroup->resetting = 1; |
1da177e4 LT |
1030 | pre_reset(drive); |
1031 | SELECT_DRIVE(drive); | |
1032 | udelay (20); | |
4c3032d8 | 1033 | hwif->OUTBSYNC(drive, WIN_SRST, io_ports->command_addr); |
68ad9910 | 1034 | ndelay(400); |
1da177e4 LT |
1035 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; |
1036 | hwgroup->polling = 1; | |
1037 | __ide_set_handler(drive, &atapi_reset_pollfunc, HZ/20, NULL); | |
1038 | spin_unlock_irqrestore(&ide_lock, flags); | |
1039 | return ide_started; | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * First, reset any device state data we were maintaining | |
1044 | * for any of the drives on this interface. | |
1045 | */ | |
1046 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1047 | pre_reset(&hwif->drives[unit]); | |
1048 | ||
4c3032d8 | 1049 | if (io_ports->ctl_addr == 0) { |
1da177e4 LT |
1050 | spin_unlock_irqrestore(&ide_lock, flags); |
1051 | return ide_stopped; | |
1052 | } | |
1053 | ||
913759ac | 1054 | hwgroup->resetting = 1; |
1da177e4 LT |
1055 | /* |
1056 | * Note that we also set nIEN while resetting the device, | |
1057 | * to mask unwanted interrupts from the interface during the reset. | |
1058 | * However, due to the design of PC hardware, this will cause an | |
1059 | * immediate interrupt due to the edge transition it produces. | |
1060 | * This single interrupt gives us a "fast poll" for drives that | |
1061 | * recover from reset very quickly, saving us the first 50ms wait time. | |
1062 | */ | |
1063 | /* set SRST and nIEN */ | |
4c3032d8 | 1064 | hwif->OUTBSYNC(drive, drive->ctl|6, io_ports->ctl_addr); |
1da177e4 LT |
1065 | /* more than enough time */ |
1066 | udelay(10); | |
23579a2a BZ |
1067 | if (drive->quirk_list == 2) |
1068 | ctl = drive->ctl; /* clear SRST and nIEN */ | |
1069 | else | |
1070 | ctl = drive->ctl | 2; /* clear SRST, leave nIEN */ | |
4c3032d8 | 1071 | hwif->OUTBSYNC(drive, ctl, io_ports->ctl_addr); |
1da177e4 LT |
1072 | /* more than enough time */ |
1073 | udelay(10); | |
1074 | hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE; | |
1075 | hwgroup->polling = 1; | |
1076 | __ide_set_handler(drive, &reset_pollfunc, HZ/20, NULL); | |
1077 | ||
1078 | /* | |
1079 | * Some weird controller like resetting themselves to a strange | |
1080 | * state when the disks are reset this way. At least, the Winbond | |
1081 | * 553 documentation says that | |
1082 | */ | |
ac95beed BZ |
1083 | port_ops = hwif->port_ops; |
1084 | if (port_ops && port_ops->resetproc) | |
1085 | port_ops->resetproc(drive); | |
1da177e4 LT |
1086 | |
1087 | spin_unlock_irqrestore(&ide_lock, flags); | |
1088 | return ide_started; | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * ide_do_reset() is the entry point to the drive/interface reset code. | |
1093 | */ | |
1094 | ||
1095 | ide_startstop_t ide_do_reset (ide_drive_t *drive) | |
1096 | { | |
1097 | return do_reset1(drive, 0); | |
1098 | } | |
1099 | ||
1100 | EXPORT_SYMBOL(ide_do_reset); | |
1101 | ||
1102 | /* | |
1103 | * ide_wait_not_busy() waits for the currently selected device on the hwif | |
9d501529 | 1104 | * to report a non-busy status, see comments in ide_probe_port(). |
1da177e4 LT |
1105 | */ |
1106 | int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) | |
1107 | { | |
1108 | u8 stat = 0; | |
1109 | ||
1110 | while(timeout--) { | |
1111 | /* | |
1112 | * Turn this into a schedule() sleep once I'm sure | |
1113 | * about locking issues (2.5 work ?). | |
1114 | */ | |
1115 | mdelay(1); | |
4c3032d8 | 1116 | stat = hwif->INB(hwif->io_ports.status_addr); |
1da177e4 LT |
1117 | if ((stat & BUSY_STAT) == 0) |
1118 | return 0; | |
1119 | /* | |
1120 | * Assume a value of 0xff means nothing is connected to | |
1121 | * the interface and it doesn't implement the pull-down | |
1122 | * resistor on D7. | |
1123 | */ | |
1124 | if (stat == 0xff) | |
1125 | return -ENODEV; | |
6842f8c8 | 1126 | touch_softlockup_watchdog(); |
1e86240f | 1127 | touch_nmi_watchdog(); |
1da177e4 LT |
1128 | } |
1129 | return -EBUSY; | |
1130 | } | |
1131 | ||
1132 | EXPORT_SYMBOL_GPL(ide_wait_not_busy); | |
1133 |