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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003 | |
3 | * | |
4 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Mostly written by Mark Lord <mlord@pobox.com> | |
9 | * and Gadi Oxman <gadio@netvision.net.il> | |
10 | * and Andre Hedrick <andre@linux-ide.org> | |
11 | * | |
12 | * See linux/MAINTAINERS for address of current maintainer. | |
13 | * | |
14 | * This is the IDE probe module, as evolved from hd.c and ide.c. | |
15 | * | |
16 | * Version 1.00 move drive probing code from ide.c to ide-probe.c | |
17 | * Version 1.01 fix compilation problem for m68k | |
18 | * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot | |
19 | * by Andrea Arcangeli | |
20 | * Version 1.03 fix for (hwif->chipset == ide_4drives) | |
21 | * Version 1.04 fixed buggy treatments of known flash memory cards | |
22 | * | |
23 | * Version 1.05 fix for (hwif->chipset == ide_pdc4030) | |
24 | * added ide6/7/8/9 | |
25 | * allowed for secondary flash card to be detectable | |
26 | * with new flag : drive->ata_flash : 1; | |
27 | * Version 1.06 stream line request queue and prep for cascade project. | |
28 | * Version 1.07 max_sect <= 255; slower disks would get behind and | |
29 | * then fall over when they get to 256. Paul G. | |
30 | * Version 1.10 Update set for new IDE. drive->id is now always | |
31 | * valid after probe time even with noprobe | |
32 | */ | |
33 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/types.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/timer.h> | |
39 | #include <linux/mm.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/major.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/genhd.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/ide.h> | |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/kmod.h> | |
49 | #include <linux/pci.h> | |
50 | ||
51 | #include <asm/byteorder.h> | |
52 | #include <asm/irq.h> | |
53 | #include <asm/uaccess.h> | |
54 | #include <asm/io.h> | |
55 | ||
56 | /** | |
57 | * generic_id - add a generic drive id | |
58 | * @drive: drive to make an ID block for | |
59 | * | |
60 | * Add a fake id field to the drive we are passed. This allows | |
61 | * use to skip a ton of NULL checks (which people always miss) | |
62 | * and make drive properties unconditional outside of this file | |
63 | */ | |
64 | ||
65 | static void generic_id(ide_drive_t *drive) | |
66 | { | |
67 | drive->id->cyls = drive->cyl; | |
68 | drive->id->heads = drive->head; | |
69 | drive->id->sectors = drive->sect; | |
70 | drive->id->cur_cyls = drive->cyl; | |
71 | drive->id->cur_heads = drive->head; | |
72 | drive->id->cur_sectors = drive->sect; | |
73 | } | |
74 | ||
75 | static void ide_disk_init_chs(ide_drive_t *drive) | |
76 | { | |
77 | struct hd_driveid *id = drive->id; | |
78 | ||
79 | /* Extract geometry if we did not already have one for the drive */ | |
80 | if (!drive->cyl || !drive->head || !drive->sect) { | |
81 | drive->cyl = drive->bios_cyl = id->cyls; | |
82 | drive->head = drive->bios_head = id->heads; | |
83 | drive->sect = drive->bios_sect = id->sectors; | |
84 | } | |
85 | ||
86 | /* Handle logical geometry translation by the drive */ | |
87 | if ((id->field_valid & 1) && id->cur_cyls && | |
88 | id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { | |
89 | drive->cyl = id->cur_cyls; | |
90 | drive->head = id->cur_heads; | |
91 | drive->sect = id->cur_sectors; | |
92 | } | |
93 | ||
94 | /* Use physical geometry if what we have still makes no sense */ | |
95 | if (drive->head > 16 && id->heads && id->heads <= 16) { | |
96 | drive->cyl = id->cyls; | |
97 | drive->head = id->heads; | |
98 | drive->sect = id->sectors; | |
99 | } | |
100 | } | |
101 | ||
102 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
103 | { | |
104 | struct hd_driveid *id = drive->id; | |
105 | ||
106 | drive->mult_count = 0; | |
107 | if (id->max_multsect) { | |
108 | #ifdef CONFIG_IDEDISK_MULTI_MODE | |
109 | id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; | |
110 | id->multsect_valid = id->multsect ? 1 : 0; | |
111 | drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; | |
112 | drive->special.b.set_multmode = drive->mult_req ? 1 : 0; | |
113 | #else /* original, pre IDE-NFG, per request of AC */ | |
114 | drive->mult_req = INITIAL_MULT_COUNT; | |
115 | if (drive->mult_req > id->max_multsect) | |
116 | drive->mult_req = id->max_multsect; | |
117 | if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) | |
118 | drive->special.b.set_multmode = 1; | |
119 | #endif | |
120 | } | |
121 | } | |
122 | ||
1da177e4 LT |
123 | /** |
124 | * do_identify - identify a drive | |
125 | * @drive: drive to identify | |
126 | * @cmd: command used | |
127 | * | |
128 | * Called when we have issued a drive identify command to | |
129 | * read and parse the results. This function is run with | |
130 | * interrupts disabled. | |
131 | */ | |
132 | ||
133 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
134 | { | |
135 | ide_hwif_t *hwif = HWIF(drive); | |
136 | int bswap = 1; | |
137 | struct hd_driveid *id; | |
138 | ||
139 | id = drive->id; | |
140 | /* read 512 bytes of id info */ | |
141 | hwif->ata_input_data(drive, id, SECTOR_WORDS); | |
142 | ||
143 | drive->id_read = 1; | |
144 | local_irq_enable(); | |
145 | ide_fix_driveid(id); | |
146 | ||
147 | #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) | |
148 | /* | |
149 | * EATA SCSI controllers do a hardware ATA emulation: | |
150 | * Ignore them if there is a driver for them available. | |
151 | */ | |
152 | if ((id->model[0] == 'P' && id->model[1] == 'M') || | |
153 | (id->model[0] == 'S' && id->model[1] == 'K')) { | |
154 | printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); | |
155 | goto err_misc; | |
156 | } | |
157 | #endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */ | |
158 | ||
159 | /* | |
160 | * WIN_IDENTIFY returns little-endian info, | |
161 | * WIN_PIDENTIFY *usually* returns little-endian info. | |
162 | */ | |
163 | if (cmd == WIN_PIDENTIFY) { | |
164 | if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ | |
165 | || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ | |
166 | || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ | |
167 | /* Vertos drives may still be weird */ | |
168 | bswap ^= 1; | |
169 | } | |
170 | ide_fixstring(id->model, sizeof(id->model), bswap); | |
171 | ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); | |
172 | ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); | |
173 | ||
174 | if (strstr(id->model, "E X A B Y T E N E S T")) | |
175 | goto err_misc; | |
176 | ||
177 | /* we depend on this a lot! */ | |
178 | id->model[sizeof(id->model)-1] = '\0'; | |
179 | printk("%s: %s, ", drive->name, id->model); | |
180 | drive->present = 1; | |
181 | drive->dead = 0; | |
182 | ||
183 | /* | |
184 | * Check for an ATAPI device | |
185 | */ | |
186 | if (cmd == WIN_PIDENTIFY) { | |
187 | u8 type = (id->config >> 8) & 0x1f; | |
188 | printk("ATAPI "); | |
189 | switch (type) { | |
190 | case ide_floppy: | |
191 | if (!strstr(id->model, "CD-ROM")) { | |
192 | if (!strstr(id->model, "oppy") && | |
193 | !strstr(id->model, "poyp") && | |
194 | !strstr(id->model, "ZIP")) | |
195 | printk("cdrom or floppy?, assuming "); | |
196 | if (drive->media != ide_cdrom) { | |
197 | printk ("FLOPPY"); | |
198 | drive->removable = 1; | |
199 | break; | |
200 | } | |
201 | } | |
202 | /* Early cdrom models used zero */ | |
203 | type = ide_cdrom; | |
204 | case ide_cdrom: | |
205 | drive->removable = 1; | |
206 | #ifdef CONFIG_PPC | |
207 | /* kludge for Apple PowerBook internal zip */ | |
208 | if (!strstr(id->model, "CD-ROM") && | |
209 | strstr(id->model, "ZIP")) { | |
210 | printk ("FLOPPY"); | |
211 | type = ide_floppy; | |
212 | break; | |
213 | } | |
214 | #endif | |
215 | printk ("CD/DVD-ROM"); | |
216 | break; | |
217 | case ide_tape: | |
218 | printk ("TAPE"); | |
219 | break; | |
220 | case ide_optical: | |
221 | printk ("OPTICAL"); | |
222 | drive->removable = 1; | |
223 | break; | |
224 | default: | |
225 | printk("UNKNOWN (type %d)", type); | |
226 | break; | |
227 | } | |
228 | printk (" drive\n"); | |
229 | drive->media = type; | |
230 | /* an ATAPI device ignores DRDY */ | |
231 | drive->ready_stat = 0; | |
232 | return; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Not an ATAPI device: looks like a "regular" hard disk | |
237 | */ | |
98109337 RP |
238 | |
239 | /* | |
240 | * 0x848a = CompactFlash device | |
241 | * These are *not* removable in Linux definition of the term | |
242 | */ | |
243 | ||
244 | if ((id->config != 0x848a) && (id->config & (1<<7))) | |
1da177e4 LT |
245 | drive->removable = 1; |
246 | ||
1da177e4 | 247 | drive->media = ide_disk; |
98109337 | 248 | printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); |
1da177e4 LT |
249 | QUIRK_LIST(drive); |
250 | return; | |
251 | ||
252 | err_misc: | |
253 | kfree(id); | |
254 | drive->present = 0; | |
255 | return; | |
256 | } | |
257 | ||
258 | /** | |
259 | * actual_try_to_identify - send ata/atapi identify | |
260 | * @drive: drive to identify | |
261 | * @cmd: command to use | |
262 | * | |
263 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
264 | * and waits for a response. It also monitors irqs while this is | |
265 | * happening, in hope of automatically determining which one is | |
266 | * being used by the interface. | |
267 | * | |
268 | * Returns: 0 device was identified | |
269 | * 1 device timed-out (no response to identify request) | |
270 | * 2 device aborted the command (refused to identify itself) | |
271 | */ | |
272 | ||
273 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
274 | { | |
275 | ide_hwif_t *hwif = HWIF(drive); | |
276 | int rc; | |
277 | unsigned long hd_status; | |
278 | unsigned long timeout; | |
279 | u8 s = 0, a = 0; | |
280 | ||
281 | /* take a deep breath */ | |
282 | msleep(50); | |
283 | ||
284 | if (IDE_CONTROL_REG) { | |
285 | a = hwif->INB(IDE_ALTSTATUS_REG); | |
286 | s = hwif->INB(IDE_STATUS_REG); | |
287 | if ((a ^ s) & ~INDEX_STAT) { | |
288 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " | |
289 | "ALTSTATUS(0x%02x)\n", drive->name, s, a); | |
290 | /* ancient Seagate drives, broken interfaces */ | |
291 | hd_status = IDE_STATUS_REG; | |
292 | } else { | |
293 | /* use non-intrusive polling */ | |
294 | hd_status = IDE_ALTSTATUS_REG; | |
295 | } | |
296 | } else | |
297 | hd_status = IDE_STATUS_REG; | |
298 | ||
299 | /* set features register for atapi | |
300 | * identify command to be sure of reply | |
301 | */ | |
302 | if ((cmd == WIN_PIDENTIFY)) | |
303 | /* disable dma & overlap */ | |
304 | hwif->OUTB(0, IDE_FEATURE_REG); | |
305 | ||
306 | /* ask drive for ID */ | |
307 | hwif->OUTB(cmd, IDE_COMMAND_REG); | |
308 | ||
309 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; | |
310 | timeout += jiffies; | |
311 | do { | |
312 | if (time_after(jiffies, timeout)) { | |
313 | /* drive timed-out */ | |
314 | return 1; | |
315 | } | |
316 | /* give drive a breather */ | |
317 | msleep(50); | |
318 | } while ((hwif->INB(hd_status)) & BUSY_STAT); | |
319 | ||
320 | /* wait for IRQ and DRQ_STAT */ | |
321 | msleep(50); | |
322 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { | |
323 | unsigned long flags; | |
324 | ||
325 | /* local CPU only; some systems need this */ | |
326 | local_irq_save(flags); | |
327 | /* drive returned ID */ | |
328 | do_identify(drive, cmd); | |
329 | /* drive responded with ID */ | |
330 | rc = 0; | |
331 | /* clear drive IRQ */ | |
332 | (void) hwif->INB(IDE_STATUS_REG); | |
333 | local_irq_restore(flags); | |
334 | } else { | |
335 | /* drive refused ID */ | |
336 | rc = 2; | |
337 | } | |
338 | return rc; | |
339 | } | |
340 | ||
341 | /** | |
342 | * try_to_identify - try to identify a drive | |
343 | * @drive: drive to probe | |
344 | * @cmd: command to use | |
345 | * | |
346 | * Issue the identify command and then do IRQ probing to | |
347 | * complete the identification when needed by finding the | |
348 | * IRQ the drive is attached to | |
349 | */ | |
350 | ||
351 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
352 | { | |
353 | ide_hwif_t *hwif = HWIF(drive); | |
354 | int retval; | |
355 | int autoprobe = 0; | |
356 | unsigned long cookie = 0; | |
357 | ||
358 | /* | |
359 | * Disable device irq unless we need to | |
360 | * probe for it. Otherwise we'll get spurious | |
361 | * interrupts during the identify-phase that | |
362 | * the irq handler isn't expecting. | |
363 | */ | |
364 | if (IDE_CONTROL_REG) { | |
365 | u8 ctl = drive->ctl | 2; | |
366 | if (!hwif->irq) { | |
367 | autoprobe = 1; | |
368 | cookie = probe_irq_on(); | |
369 | /* enable device irq */ | |
370 | ctl &= ~2; | |
371 | } | |
372 | hwif->OUTB(ctl, IDE_CONTROL_REG); | |
373 | } | |
374 | ||
375 | retval = actual_try_to_identify(drive, cmd); | |
376 | ||
377 | if (autoprobe) { | |
378 | int irq; | |
379 | /* mask device irq */ | |
380 | hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); | |
381 | /* clear drive IRQ */ | |
382 | (void) hwif->INB(IDE_STATUS_REG); | |
383 | udelay(5); | |
384 | irq = probe_irq_off(cookie); | |
385 | if (!hwif->irq) { | |
386 | if (irq > 0) { | |
387 | hwif->irq = irq; | |
388 | } else { | |
389 | /* Mmmm.. multiple IRQs.. | |
390 | * don't know which was ours | |
391 | */ | |
392 | printk("%s: IRQ probe failed (0x%lx)\n", | |
393 | drive->name, cookie); | |
394 | } | |
395 | } | |
396 | } | |
397 | return retval; | |
398 | } | |
399 | ||
400 | ||
401 | /** | |
402 | * do_probe - probe an IDE device | |
403 | * @drive: drive to probe | |
404 | * @cmd: command to use | |
405 | * | |
406 | * do_probe() has the difficult job of finding a drive if it exists, | |
407 | * without getting hung up if it doesn't exist, without trampling on | |
408 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
409 | * | |
410 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
411 | * but does not respond right away, the probe will "hang in there" | |
412 | * for the maximum wait time (about 30 seconds), otherwise it will | |
413 | * exit much more quickly. | |
414 | * | |
415 | * Returns: 0 device was identified | |
416 | * 1 device timed-out (no response to identify request) | |
417 | * 2 device aborted the command (refused to identify itself) | |
418 | * 3 bad status from device (possible for ATAPI drives) | |
419 | * 4 probe was not attempted because failure was obvious | |
420 | */ | |
421 | ||
422 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
423 | { | |
424 | int rc; | |
425 | ide_hwif_t *hwif = HWIF(drive); | |
426 | ||
427 | if (drive->present) { | |
428 | /* avoid waiting for inappropriate probes */ | |
429 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) | |
430 | return 4; | |
431 | } | |
432 | #ifdef DEBUG | |
433 | printk("probing for %s: present=%d, media=%d, probetype=%s\n", | |
434 | drive->name, drive->present, drive->media, | |
435 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); | |
436 | #endif | |
437 | ||
438 | /* needed for some systems | |
439 | * (e.g. crw9624 as drive0 with disk as slave) | |
440 | */ | |
441 | msleep(50); | |
442 | SELECT_DRIVE(drive); | |
443 | msleep(50); | |
444 | if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { | |
445 | if (drive->select.b.unit != 0) { | |
446 | /* exit with drive0 selected */ | |
447 | SELECT_DRIVE(&hwif->drives[0]); | |
448 | /* allow BUSY_STAT to assert & clear */ | |
449 | msleep(50); | |
450 | } | |
451 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
452 | return 3; | |
453 | } | |
454 | ||
455 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || | |
456 | drive->present || cmd == WIN_PIDENTIFY) { | |
457 | /* send cmd and wait */ | |
458 | if ((rc = try_to_identify(drive, cmd))) { | |
459 | /* failed: try again */ | |
460 | rc = try_to_identify(drive,cmd); | |
461 | } | |
462 | if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) | |
463 | return 4; | |
464 | ||
465 | if ((rc == 1 && cmd == WIN_PIDENTIFY) && | |
466 | ((drive->autotune == IDE_TUNE_DEFAULT) || | |
467 | (drive->autotune == IDE_TUNE_AUTO))) { | |
468 | unsigned long timeout; | |
469 | printk("%s: no response (status = 0x%02x), " | |
470 | "resetting drive\n", drive->name, | |
471 | hwif->INB(IDE_STATUS_REG)); | |
472 | msleep(50); | |
473 | hwif->OUTB(drive->select.all, IDE_SELECT_REG); | |
474 | msleep(50); | |
475 | hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); | |
476 | timeout = jiffies; | |
477 | while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && | |
478 | time_before(jiffies, timeout + WAIT_WORSTCASE)) | |
479 | msleep(50); | |
480 | rc = try_to_identify(drive, cmd); | |
481 | } | |
482 | if (rc == 1) | |
483 | printk("%s: no response (status = 0x%02x)\n", | |
484 | drive->name, hwif->INB(IDE_STATUS_REG)); | |
485 | /* ensure drive irq is clear */ | |
486 | (void) hwif->INB(IDE_STATUS_REG); | |
487 | } else { | |
488 | /* not present or maybe ATAPI */ | |
489 | rc = 3; | |
490 | } | |
491 | if (drive->select.b.unit != 0) { | |
492 | /* exit with drive0 selected */ | |
493 | SELECT_DRIVE(&hwif->drives[0]); | |
494 | msleep(50); | |
495 | /* ensure drive irq is clear */ | |
496 | (void) hwif->INB(IDE_STATUS_REG); | |
497 | } | |
498 | return rc; | |
499 | } | |
500 | ||
501 | /* | |
502 | * | |
503 | */ | |
504 | static void enable_nest (ide_drive_t *drive) | |
505 | { | |
506 | ide_hwif_t *hwif = HWIF(drive); | |
507 | unsigned long timeout; | |
508 | ||
509 | printk("%s: enabling %s -- ", hwif->name, drive->id->model); | |
510 | SELECT_DRIVE(drive); | |
511 | msleep(50); | |
512 | hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); | |
513 | timeout = jiffies + WAIT_WORSTCASE; | |
514 | do { | |
515 | if (time_after(jiffies, timeout)) { | |
516 | printk("failed (timeout)\n"); | |
517 | return; | |
518 | } | |
519 | msleep(50); | |
520 | } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); | |
521 | ||
522 | msleep(50); | |
523 | ||
524 | if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { | |
525 | printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); | |
526 | } else { | |
527 | printk("success\n"); | |
528 | } | |
529 | ||
530 | /* if !(success||timed-out) */ | |
531 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
532 | /* look for ATAPI device */ | |
533 | (void) do_probe(drive, WIN_PIDENTIFY); | |
534 | } | |
535 | } | |
536 | ||
537 | /** | |
538 | * probe_for_drives - upper level drive probe | |
539 | * @drive: drive to probe for | |
540 | * | |
541 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
542 | * and presents things to the user as needed. | |
543 | * | |
544 | * Returns: 0 no device was found | |
545 | * 1 device was found (note: drive->present might | |
546 | * still be 0) | |
547 | */ | |
548 | ||
549 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
550 | { | |
551 | /* | |
552 | * In order to keep things simple we have an id | |
553 | * block for all drives at all times. If the device | |
554 | * is pre ATA or refuses ATA/ATAPI identify we | |
555 | * will add faked data to this. | |
556 | * | |
557 | * Also note that 0 everywhere means "can't do X" | |
558 | */ | |
559 | ||
f5e3c2fa | 560 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
1da177e4 LT |
561 | drive->id_read = 0; |
562 | if(drive->id == NULL) | |
563 | { | |
564 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
565 | return 0; | |
566 | } | |
1da177e4 LT |
567 | strcpy(drive->id->model, "UNKNOWN"); |
568 | ||
569 | /* skip probing? */ | |
570 | if (!drive->noprobe) | |
571 | { | |
572 | /* if !(success||timed-out) */ | |
573 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
574 | /* look for ATAPI device */ | |
575 | (void) do_probe(drive, WIN_PIDENTIFY); | |
576 | } | |
577 | if (strstr(drive->id->model, "E X A B Y T E N E S T")) | |
578 | enable_nest(drive); | |
579 | if (!drive->present) | |
580 | /* drive not found */ | |
581 | return 0; | |
582 | ||
583 | /* identification failed? */ | |
584 | if (!drive->id_read) { | |
585 | if (drive->media == ide_disk) { | |
586 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
587 | drive->name, drive->cyl, | |
588 | drive->head, drive->sect); | |
589 | } else if (drive->media == ide_cdrom) { | |
590 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
591 | } else { | |
592 | /* nuke it */ | |
593 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
594 | drive->present = 0; | |
595 | } | |
596 | } | |
597 | /* drive was found */ | |
598 | } | |
599 | if(!drive->present) | |
600 | return 0; | |
601 | /* The drive wasn't being helpful. Add generic info only */ | |
602 | if (drive->id_read == 0) { | |
603 | generic_id(drive); | |
604 | return 1; | |
605 | } | |
606 | ||
607 | if (drive->media == ide_disk) { | |
608 | ide_disk_init_chs(drive); | |
609 | ide_disk_init_mult_count(drive); | |
610 | } | |
611 | ||
612 | return drive->present; | |
613 | } | |
614 | ||
615 | static void hwif_release_dev (struct device *dev) | |
616 | { | |
617 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
618 | ||
f36d4024 | 619 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
620 | } |
621 | ||
622 | static void hwif_register (ide_hwif_t *hwif) | |
623 | { | |
349ae23f RD |
624 | int ret; |
625 | ||
1da177e4 LT |
626 | /* register with global device tree */ |
627 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
628 | hwif->gendev.driver_data = hwif; | |
629 | if (hwif->gendev.parent == NULL) { | |
630 | if (hwif->pci_dev) | |
631 | hwif->gendev.parent = &hwif->pci_dev->dev; | |
632 | else | |
633 | /* Would like to do = &device_legacy */ | |
634 | hwif->gendev.parent = NULL; | |
635 | } | |
636 | hwif->gendev.release = hwif_release_dev; | |
349ae23f RD |
637 | ret = device_register(&hwif->gendev); |
638 | if (ret < 0) | |
639 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", | |
640 | __FUNCTION__, ret); | |
1da177e4 LT |
641 | } |
642 | ||
643 | static int wait_hwif_ready(ide_hwif_t *hwif) | |
644 | { | |
645 | int rc; | |
646 | ||
647 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
648 | ||
649 | /* Let HW settle down a bit from whatever init state we | |
650 | * come from */ | |
651 | mdelay(2); | |
652 | ||
653 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
654 | * I know of at least one disk who takes 31 seconds, I use 35 | |
655 | * here to be safe | |
656 | */ | |
657 | rc = ide_wait_not_busy(hwif, 35000); | |
658 | if (rc) | |
659 | return rc; | |
660 | ||
661 | /* Now make sure both master & slave are ready */ | |
662 | SELECT_DRIVE(&hwif->drives[0]); | |
663 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
664 | mdelay(2); | |
284e4238 | 665 | rc = ide_wait_not_busy(hwif, 35000); |
1da177e4 LT |
666 | if (rc) |
667 | return rc; | |
668 | SELECT_DRIVE(&hwif->drives[1]); | |
669 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
670 | mdelay(2); | |
284e4238 | 671 | rc = ide_wait_not_busy(hwif, 35000); |
1da177e4 LT |
672 | |
673 | /* Exit function with master reselected (let's be sane) */ | |
674 | SELECT_DRIVE(&hwif->drives[0]); | |
675 | ||
676 | return rc; | |
677 | } | |
678 | ||
679 | /** | |
680 | * ide_undecoded_slave - look for bad CF adapters | |
681 | * @hwif: interface | |
682 | * | |
683 | * Analyse the drives on the interface and attempt to decide if we | |
684 | * have the same drive viewed twice. This occurs with crap CF adapters | |
685 | * and PCMCIA sometimes. | |
686 | */ | |
687 | ||
688 | void ide_undecoded_slave(ide_hwif_t *hwif) | |
689 | { | |
690 | ide_drive_t *drive0 = &hwif->drives[0]; | |
691 | ide_drive_t *drive1 = &hwif->drives[1]; | |
692 | ||
693 | if (drive0->present == 0 || drive1->present == 0) | |
694 | return; | |
695 | ||
696 | /* If the models don't match they are not the same product */ | |
697 | if (strcmp(drive0->id->model, drive1->id->model)) | |
698 | return; | |
699 | ||
700 | /* Serial numbers do not match */ | |
701 | if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) | |
702 | return; | |
703 | ||
704 | /* No serial number, thankfully very rare for CF */ | |
705 | if (drive0->id->serial_no[0] == 0) | |
706 | return; | |
707 | ||
708 | /* Appears to be an IDE flash adapter with decode bugs */ | |
709 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
710 | ||
711 | drive1->present = 0; | |
712 | } | |
713 | ||
714 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
715 | ||
716 | /* | |
717 | * This routine only knows how to look for drive units 0 and 1 | |
718 | * on an interface, so any setting of MAX_DRIVES > 2 won't work here. | |
719 | */ | |
720 | static void probe_hwif(ide_hwif_t *hwif) | |
721 | { | |
722 | unsigned int unit; | |
723 | unsigned long flags; | |
724 | unsigned int irqd; | |
725 | ||
726 | if (hwif->noprobe) | |
727 | return; | |
728 | ||
729 | if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && | |
730 | (ide_hwif_request_regions(hwif))) { | |
731 | u16 msgout = 0; | |
732 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
733 | ide_drive_t *drive = &hwif->drives[unit]; | |
734 | if (drive->present) { | |
735 | drive->present = 0; | |
736 | printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", | |
737 | drive->name); | |
738 | msgout = 1; | |
739 | } | |
740 | } | |
741 | if (!msgout) | |
742 | printk(KERN_ERR "%s: ports already in use, skipping probe\n", | |
743 | hwif->name); | |
744 | return; | |
745 | } | |
746 | ||
747 | /* | |
748 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
749 | * we'll install our IRQ driver much later... | |
750 | */ | |
751 | irqd = hwif->irq; | |
752 | if (irqd) | |
753 | disable_irq(hwif->irq); | |
754 | ||
755 | local_irq_set(flags); | |
756 | ||
757 | /* This is needed on some PPCs and a bunch of BIOS-less embedded | |
758 | * platforms. Typical cases are: | |
759 | * | |
760 | * - The firmware hard reset the disk before booting the kernel, | |
761 | * the drive is still doing it's poweron-reset sequence, that | |
762 | * can take up to 30 seconds | |
763 | * - The firmware does nothing (or no firmware), the device is | |
764 | * still in POST state (same as above actually). | |
765 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
766 | * their reset sequence even when they are non-selected slave | |
767 | * devices, thus preventing discovery of the main HD | |
768 | * | |
769 | * Doing this wait-for-busy should not harm any existing configuration | |
770 | * (at least things won't be worse than what current code does, that | |
771 | * is blindly go & talk to the drive) and fix some issues like the | |
772 | * above. | |
773 | * | |
774 | * BenH. | |
775 | */ | |
776 | if (wait_hwif_ready(hwif) == -EBUSY) | |
777 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); | |
778 | ||
779 | /* | |
780 | * Second drive should only exist if first drive was found, | |
781 | * but a lot of cdrom drives are configured as single slaves. | |
782 | */ | |
783 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
784 | ide_drive_t *drive = &hwif->drives[unit]; | |
785 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
786 | (void) probe_for_drive(drive); | |
787 | if (drive->present && !hwif->present) { | |
788 | hwif->present = 1; | |
789 | if (hwif->chipset != ide_4drives || | |
790 | !hwif->mate || | |
791 | !hwif->mate->present) { | |
792 | hwif_register(hwif); | |
793 | } | |
794 | } | |
795 | } | |
796 | if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { | |
797 | unsigned long timeout = jiffies + WAIT_WORSTCASE; | |
798 | u8 stat; | |
799 | ||
800 | printk(KERN_WARNING "%s: reset\n", hwif->name); | |
801 | hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
802 | udelay(10); | |
803 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
804 | do { | |
805 | msleep(50); | |
806 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); | |
807 | } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); | |
808 | ||
809 | } | |
810 | local_irq_restore(flags); | |
811 | /* | |
812 | * Use cached IRQ number. It might be (and is...) changed by probe | |
813 | * code above | |
814 | */ | |
815 | if (irqd) | |
816 | enable_irq(irqd); | |
817 | ||
818 | if (!hwif->present) { | |
819 | ide_hwif_release_regions(hwif); | |
820 | return; | |
821 | } | |
822 | ||
823 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
824 | ide_drive_t *drive = &hwif->drives[unit]; | |
825 | ||
826 | if (drive->present) { | |
827 | if (hwif->tuneproc != NULL && | |
828 | drive->autotune == IDE_TUNE_AUTO) | |
829 | /* auto-tune PIO mode */ | |
830 | hwif->tuneproc(drive, 255); | |
831 | ||
832 | if (drive->autotune != IDE_TUNE_DEFAULT && | |
833 | drive->autotune != IDE_TUNE_AUTO) | |
834 | continue; | |
835 | ||
836 | drive->nice1 = 1; | |
837 | ||
838 | /* | |
839 | * MAJOR HACK BARF :-/ | |
840 | * | |
841 | * FIXME: chipsets own this cruft! | |
842 | */ | |
843 | /* | |
844 | * Move here to prevent module loading clashing. | |
845 | */ | |
846 | // drive->autodma = hwif->autodma; | |
847 | if (hwif->ide_dma_check) { | |
848 | /* | |
849 | * Force DMAing for the beginning of the check. | |
850 | * Some chipsets appear to do interesting | |
851 | * things, if not checked and cleared. | |
852 | * PARANOIA!!! | |
853 | */ | |
7469aaf6 | 854 | hwif->dma_off_quietly(drive); |
1da177e4 LT |
855 | #ifdef CONFIG_IDEDMA_ONLYDISK |
856 | if (drive->media == ide_disk) | |
857 | #endif | |
3608b5d7 | 858 | ide_set_dma(drive); |
1da177e4 LT |
859 | } |
860 | } | |
861 | } | |
208a08f7 KG |
862 | |
863 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
864 | ide_drive_t *drive = &hwif->drives[unit]; | |
865 | ||
866 | if (hwif->no_io_32bit) | |
867 | drive->no_io_32bit = 1; | |
868 | else | |
869 | drive->no_io_32bit = drive->id->dword_io ? 1 : 0; | |
870 | } | |
1da177e4 LT |
871 | } |
872 | ||
873 | static int hwif_init(ide_hwif_t *hwif); | |
874 | ||
875 | int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif)) | |
876 | { | |
877 | probe_hwif(hwif); | |
878 | ||
879 | if (fixup) | |
880 | fixup(hwif); | |
881 | ||
882 | if (!hwif_init(hwif)) { | |
883 | printk(KERN_INFO "%s: failed to initialize IDE interface\n", | |
884 | hwif->name); | |
885 | return -1; | |
886 | } | |
887 | ||
888 | if (hwif->present) { | |
889 | u16 unit = 0; | |
349ae23f RD |
890 | int ret; |
891 | ||
1da177e4 LT |
892 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
893 | ide_drive_t *drive = &hwif->drives[unit]; | |
894 | /* For now don't attach absent drives, we may | |
895 | want them on default or a new "empty" class | |
896 | for hotplug reprobing ? */ | |
897 | if (drive->present) { | |
349ae23f RD |
898 | ret = device_register(&drive->gendev); |
899 | if (ret < 0) | |
900 | printk(KERN_WARNING "IDE: %s: " | |
901 | "device_register error: %d\n", | |
902 | __FUNCTION__, ret); | |
1da177e4 LT |
903 | } |
904 | } | |
905 | } | |
906 | return 0; | |
907 | } | |
908 | ||
909 | int probe_hwif_init(ide_hwif_t *hwif) | |
910 | { | |
911 | return probe_hwif_init_with_fixup(hwif, NULL); | |
912 | } | |
913 | ||
914 | EXPORT_SYMBOL(probe_hwif_init); | |
915 | ||
916 | #if MAX_HWIFS > 1 | |
917 | /* | |
918 | * save_match() is used to simplify logic in init_irq() below. | |
919 | * | |
920 | * A loophole here is that we may not know about a particular | |
921 | * hwif's irq until after that hwif is actually probed/initialized.. | |
922 | * This could be a problem for the case where an hwif is on a | |
923 | * dual interface that requires serialization (eg. cmd640) and another | |
924 | * hwif using one of the same irqs is initialized beforehand. | |
925 | * | |
926 | * This routine detects and reports such situations, but does not fix them. | |
927 | */ | |
928 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
929 | { | |
930 | ide_hwif_t *m = *match; | |
931 | ||
932 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
933 | if (!new->hwgroup) | |
934 | return; | |
935 | printk("%s: potential irq problem with %s and %s\n", | |
936 | hwif->name, new->name, m->name); | |
937 | } | |
938 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
939 | *match = new; | |
940 | } | |
941 | #endif /* MAX_HWIFS > 1 */ | |
942 | ||
943 | /* | |
944 | * init request queue | |
945 | */ | |
946 | static int ide_init_queue(ide_drive_t *drive) | |
947 | { | |
948 | request_queue_t *q; | |
949 | ide_hwif_t *hwif = HWIF(drive); | |
950 | int max_sectors = 256; | |
951 | int max_sg_entries = PRD_ENTRIES; | |
952 | ||
953 | /* | |
954 | * Our default set up assumes the normal IDE case, | |
955 | * that is 64K segmenting, standard PRD setup | |
956 | * and LBA28. Some drivers then impose their own | |
957 | * limits and LBA48 we could raise it but as yet | |
958 | * do not. | |
959 | */ | |
1946089a | 960 | |
556e58fe | 961 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
962 | if (!q) |
963 | return 1; | |
964 | ||
965 | q->queuedata = drive; | |
966 | blk_queue_segment_boundary(q, 0xffff); | |
967 | ||
968 | if (!hwif->rqsize) { | |
969 | if (hwif->no_lba48 || hwif->no_lba48_dma) | |
970 | hwif->rqsize = 256; | |
971 | else | |
972 | hwif->rqsize = 65536; | |
973 | } | |
974 | if (hwif->rqsize < max_sectors) | |
975 | max_sectors = hwif->rqsize; | |
976 | blk_queue_max_sectors(q, max_sectors); | |
977 | ||
978 | #ifdef CONFIG_PCI | |
979 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
980 | * creates segments that don't completely match our boundary | |
981 | * requirements and thus need to be broken up again. Because it | |
982 | * doesn't align properly either, we may actually have to break up | |
983 | * to more segments than what was we got in the first place, a max | |
984 | * worst case is twice as many. | |
985 | * This will be fixed once we teach pci_map_sg() about our boundary | |
986 | * requirements, hopefully soon. *FIXME* | |
987 | */ | |
988 | if (!PCI_DMA_BUS_IS_PHYS) | |
989 | max_sg_entries >>= 1; | |
990 | #endif /* CONFIG_PCI */ | |
991 | ||
992 | blk_queue_max_hw_segments(q, max_sg_entries); | |
993 | blk_queue_max_phys_segments(q, max_sg_entries); | |
994 | ||
995 | /* assign drive queue */ | |
996 | drive->queue = q; | |
997 | ||
998 | /* needs drive->queue to be set */ | |
999 | ide_toggle_bounce(drive, 1); | |
1000 | ||
1da177e4 LT |
1001 | return 0; |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * This routine sets up the irq for an ide interface, and creates a new | |
1006 | * hwgroup for the irq/hwif if none was previously assigned. | |
1007 | * | |
1008 | * Much of the code is for correctly detecting/handling irq sharing | |
1009 | * and irq serialization situations. This is somewhat complex because | |
1010 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1011 | * | |
362537b9 | 1012 | * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with |
1da177e4 LT |
1013 | * interrupts completely disabled. This can be bad for interrupt latency, |
1014 | * but anything else has led to problems on some machines. We re-enable | |
1015 | * interrupts as much as we can safely do in most places. | |
1016 | */ | |
1017 | static int init_irq (ide_hwif_t *hwif) | |
1018 | { | |
1019 | unsigned int index; | |
1020 | ide_hwgroup_t *hwgroup; | |
1021 | ide_hwif_t *match = NULL; | |
1022 | ||
1023 | ||
1024 | BUG_ON(in_interrupt()); | |
1025 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
1026 | BUG_ON(hwif == NULL); |
1027 | ||
1da177e4 LT |
1028 | down(&ide_cfg_sem); |
1029 | hwif->hwgroup = NULL; | |
1030 | #if MAX_HWIFS > 1 | |
1031 | /* | |
1032 | * Group up with any other hwifs that share our irq(s). | |
1033 | */ | |
1034 | for (index = 0; index < MAX_HWIFS; index++) { | |
1035 | ide_hwif_t *h = &ide_hwifs[index]; | |
1036 | if (h->hwgroup) { /* scan only initialized hwif's */ | |
1037 | if (hwif->irq == h->irq) { | |
1038 | hwif->sharing_irq = h->sharing_irq = 1; | |
1039 | if (hwif->chipset != ide_pci || | |
1040 | h->chipset != ide_pci) { | |
1041 | save_match(hwif, h, &match); | |
1042 | } | |
1043 | } | |
1044 | if (hwif->serialized) { | |
1045 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1046 | save_match(hwif, h, &match); | |
1047 | } | |
1048 | if (h->serialized) { | |
1049 | if (h->mate && hwif->irq == h->mate->irq) | |
1050 | save_match(hwif, h, &match); | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | #endif /* MAX_HWIFS > 1 */ | |
1055 | /* | |
1056 | * If we are still without a hwgroup, then form a new one | |
1057 | */ | |
1058 | if (match) { | |
1059 | hwgroup = match->hwgroup; | |
1060 | hwif->hwgroup = hwgroup; | |
1061 | /* | |
1062 | * Link us into the hwgroup. | |
1063 | * This must be done early, do ensure that unexpected_intr | |
1064 | * can find the hwif and prevent irq storms. | |
1065 | * No drives are attached to the new hwif, choose_drive | |
1066 | * can't do anything stupid (yet). | |
1067 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1068 | * linked list, the first entry is the hwif that owns | |
1069 | * hwgroup->handler - do not change that. | |
1070 | */ | |
1071 | spin_lock_irq(&ide_lock); | |
1072 | hwif->next = hwgroup->hwif->next; | |
1073 | hwgroup->hwif->next = hwif; | |
1074 | spin_unlock_irq(&ide_lock); | |
1075 | } else { | |
1946089a | 1076 | hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL, |
556e58fe | 1077 | hwif_to_node(hwif->drives[0].hwif)); |
1da177e4 LT |
1078 | if (!hwgroup) |
1079 | goto out_up; | |
1080 | ||
1081 | hwif->hwgroup = hwgroup; | |
1082 | ||
1083 | memset(hwgroup, 0, sizeof(ide_hwgroup_t)); | |
1084 | hwgroup->hwif = hwif->next = hwif; | |
1085 | hwgroup->rq = NULL; | |
1086 | hwgroup->handler = NULL; | |
1087 | hwgroup->drive = NULL; | |
1088 | hwgroup->busy = 0; | |
1089 | init_timer(&hwgroup->timer); | |
1090 | hwgroup->timer.function = &ide_timer_expiry; | |
1091 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * Allocate the irq, if not already obtained for another hwif | |
1096 | */ | |
1097 | if (!match || match->irq != hwif->irq) { | |
362537b9 | 1098 | int sa = IRQF_DISABLED; |
1da177e4 | 1099 | #if defined(__mc68000__) || defined(CONFIG_APUS) |
362537b9 | 1100 | sa = IRQF_SHARED; |
1da177e4 LT |
1101 | #endif /* __mc68000__ || CONFIG_APUS */ |
1102 | ||
1103 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { | |
362537b9 | 1104 | sa = IRQF_SHARED; |
1da177e4 | 1105 | #ifndef CONFIG_IDEPCI_SHARE_IRQ |
362537b9 | 1106 | sa |= IRQF_DISABLED; |
1da177e4 LT |
1107 | #endif /* CONFIG_IDEPCI_SHARE_IRQ */ |
1108 | } | |
1109 | ||
1110 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) | |
1111 | /* clear nIEN */ | |
1112 | hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
1113 | ||
1114 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1115 | goto out_unlink; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * For any present drive: | |
1120 | * - allocate the block device queue | |
1121 | * - link drive into the hwgroup | |
1122 | */ | |
1123 | for (index = 0; index < MAX_DRIVES; ++index) { | |
1124 | ide_drive_t *drive = &hwif->drives[index]; | |
1125 | if (!drive->present) | |
1126 | continue; | |
1127 | if (ide_init_queue(drive)) { | |
1128 | printk(KERN_ERR "ide: failed to init %s\n",drive->name); | |
1129 | continue; | |
1130 | } | |
1131 | spin_lock_irq(&ide_lock); | |
1132 | if (!hwgroup->drive) { | |
1133 | /* first drive for hwgroup. */ | |
1134 | drive->next = drive; | |
1135 | hwgroup->drive = drive; | |
1136 | hwgroup->hwif = HWIF(hwgroup->drive); | |
1137 | } else { | |
1138 | drive->next = hwgroup->drive->next; | |
1139 | hwgroup->drive->next = drive; | |
1140 | } | |
1141 | spin_unlock_irq(&ide_lock); | |
1142 | } | |
1143 | ||
c6387a48 | 1144 | #if !defined(__mc68000__) && !defined(CONFIG_APUS) |
1da177e4 LT |
1145 | printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
1146 | hwif->io_ports[IDE_DATA_OFFSET], | |
1147 | hwif->io_ports[IDE_DATA_OFFSET]+7, | |
1148 | hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); | |
1da177e4 LT |
1149 | #else |
1150 | printk("%s at 0x%08lx on irq %d", hwif->name, | |
1151 | hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); | |
1152 | #endif /* __mc68000__ && CONFIG_APUS */ | |
1153 | if (match) | |
1154 | printk(" (%sed with %s)", | |
1155 | hwif->sharing_irq ? "shar" : "serializ", match->name); | |
1156 | printk("\n"); | |
1157 | up(&ide_cfg_sem); | |
1158 | return 0; | |
1159 | out_unlink: | |
1160 | spin_lock_irq(&ide_lock); | |
1161 | if (hwif->next == hwif) { | |
1162 | BUG_ON(match); | |
1163 | BUG_ON(hwgroup->hwif != hwif); | |
1164 | kfree(hwgroup); | |
1165 | } else { | |
1166 | ide_hwif_t *g; | |
1167 | g = hwgroup->hwif; | |
1168 | while (g->next != hwif) | |
1169 | g = g->next; | |
1170 | g->next = hwif->next; | |
1171 | if (hwgroup->hwif == hwif) { | |
1172 | /* Impossible. */ | |
1173 | printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); | |
1174 | hwgroup->hwif = g; | |
1175 | } | |
1176 | BUG_ON(hwgroup->hwif == hwif); | |
1177 | } | |
1178 | spin_unlock_irq(&ide_lock); | |
1179 | out_up: | |
1180 | up(&ide_cfg_sem); | |
1181 | return 1; | |
1182 | } | |
1183 | ||
1184 | static int ata_lock(dev_t dev, void *data) | |
1185 | { | |
1186 | /* FIXME: we want to pin hwif down */ | |
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1191 | { | |
1192 | ide_hwif_t *hwif = data; | |
1193 | int unit = *part >> PARTN_BITS; | |
1194 | ide_drive_t *drive = &hwif->drives[unit]; | |
1195 | if (!drive->present) | |
1196 | return NULL; | |
1197 | ||
1198 | if (drive->media == ide_disk) | |
1199 | request_module("ide-disk"); | |
1200 | if (drive->scsi) | |
1201 | request_module("ide-scsi"); | |
1202 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1203 | request_module("ide-cd"); | |
1204 | if (drive->media == ide_tape) | |
1205 | request_module("ide-tape"); | |
1206 | if (drive->media == ide_floppy) | |
1207 | request_module("ide-floppy"); | |
1208 | ||
1209 | return NULL; | |
1210 | } | |
1211 | ||
1212 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1213 | { | |
1214 | struct gendisk *p = data; | |
1215 | *part &= (1 << PARTN_BITS) - 1; | |
1216 | return &p->kobj; | |
1217 | } | |
1218 | ||
1219 | static int exact_lock(dev_t dev, void *data) | |
1220 | { | |
1221 | struct gendisk *p = data; | |
1222 | ||
1223 | if (!get_disk(p)) | |
1224 | return -1; | |
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | void ide_register_region(struct gendisk *disk) | |
1229 | { | |
1230 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1231 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1232 | } | |
1233 | ||
1234 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1235 | ||
1236 | void ide_unregister_region(struct gendisk *disk) | |
1237 | { | |
1238 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1239 | disk->minors); | |
1240 | } | |
1241 | ||
1242 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1243 | ||
1244 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1245 | { | |
1246 | ide_hwif_t *hwif = drive->hwif; | |
1247 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1248 | ||
1249 | disk->major = hwif->major; | |
1250 | disk->first_minor = unit << PARTN_BITS; | |
1251 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1252 | disk->queue = drive->queue; | |
1253 | } | |
1254 | ||
1255 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1256 | ||
8604affd BZ |
1257 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1258 | { | |
1259 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1260 | ||
1261 | if (drive == drive->next) { | |
1262 | /* special case: last drive from hwgroup. */ | |
1263 | BUG_ON(hwgroup->drive != drive); | |
1264 | hwgroup->drive = NULL; | |
1265 | } else { | |
1266 | ide_drive_t *walk; | |
1267 | ||
1268 | walk = hwgroup->drive; | |
1269 | while (walk->next != drive) | |
1270 | walk = walk->next; | |
1271 | walk->next = drive->next; | |
1272 | if (hwgroup->drive == drive) { | |
1273 | hwgroup->drive = drive->next; | |
1274 | hwgroup->hwif = hwgroup->drive->hwif; | |
1275 | } | |
1276 | } | |
1277 | BUG_ON(hwgroup->drive == drive); | |
1278 | } | |
1279 | ||
1da177e4 LT |
1280 | static void drive_release_dev (struct device *dev) |
1281 | { | |
1282 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1283 | ||
8604affd | 1284 | spin_lock_irq(&ide_lock); |
8604affd | 1285 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1286 | kfree(drive->id); |
1287 | drive->id = NULL; | |
8604affd BZ |
1288 | drive->present = 0; |
1289 | /* Messed up locking ... */ | |
1290 | spin_unlock_irq(&ide_lock); | |
1291 | blk_cleanup_queue(drive->queue); | |
1292 | spin_lock_irq(&ide_lock); | |
1293 | drive->queue = NULL; | |
1294 | spin_unlock_irq(&ide_lock); | |
1295 | ||
f36d4024 | 1296 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1297 | } |
1298 | ||
1299 | /* | |
1300 | * init_gendisk() (as opposed to ide_geninit) is called for each major device, | |
1301 | * after probing for drives, to allocate partition tables and other data | |
1302 | * structures needed for the routines in genhd.c. ide_geninit() gets called | |
1303 | * somewhat later, during the partition check. | |
1304 | */ | |
1305 | static void init_gendisk (ide_hwif_t *hwif) | |
1306 | { | |
1307 | unsigned int unit; | |
1308 | ||
1309 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
1310 | ide_drive_t * drive = &hwif->drives[unit]; | |
1311 | ide_add_generic_settings(drive); | |
1312 | snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", | |
1313 | hwif->index,unit); | |
1314 | drive->gendev.parent = &hwif->gendev; | |
1315 | drive->gendev.bus = &ide_bus_type; | |
1316 | drive->gendev.driver_data = drive; | |
1317 | drive->gendev.release = drive_release_dev; | |
1da177e4 LT |
1318 | } |
1319 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, | |
1320 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1321 | } | |
1322 | ||
1323 | static int hwif_init(ide_hwif_t *hwif) | |
1324 | { | |
1325 | int old_irq; | |
1326 | ||
1327 | /* Return success if no device is connected */ | |
1328 | if (!hwif->present) | |
1329 | return 1; | |
1330 | ||
1331 | if (!hwif->irq) { | |
1332 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) | |
1333 | { | |
1334 | printk("%s: DISABLED, NO IRQ\n", hwif->name); | |
1335 | return (hwif->present = 0); | |
1336 | } | |
1337 | } | |
1338 | #ifdef CONFIG_BLK_DEV_HD | |
1339 | if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { | |
1340 | printk("%s: CANNOT SHARE IRQ WITH OLD " | |
1341 | "HARDDISK DRIVER (hd.c)\n", hwif->name); | |
1342 | return (hwif->present = 0); | |
1343 | } | |
1344 | #endif /* CONFIG_BLK_DEV_HD */ | |
1345 | ||
1346 | /* we set it back to 1 if all is ok below */ | |
1347 | hwif->present = 0; | |
1348 | ||
1349 | if (register_blkdev(hwif->major, hwif->name)) | |
1350 | return 0; | |
1351 | ||
1352 | if (!hwif->sg_max_nents) | |
1353 | hwif->sg_max_nents = PRD_ENTRIES; | |
1354 | ||
1355 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, | |
1356 | GFP_KERNEL); | |
1357 | if (!hwif->sg_table) { | |
1358 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1359 | goto out; | |
1360 | } | |
1361 | ||
1362 | if (init_irq(hwif) == 0) | |
1363 | goto done; | |
1364 | ||
1365 | old_irq = hwif->irq; | |
1366 | /* | |
1367 | * It failed to initialise. Find the default IRQ for | |
1368 | * this port and try that. | |
1369 | */ | |
1370 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { | |
1371 | printk("%s: Disabled unable to get IRQ %d.\n", | |
1372 | hwif->name, old_irq); | |
1373 | goto out; | |
1374 | } | |
1375 | if (init_irq(hwif)) { | |
1376 | printk("%s: probed IRQ %d and default IRQ %d failed.\n", | |
1377 | hwif->name, old_irq, hwif->irq); | |
1378 | goto out; | |
1379 | } | |
1380 | printk("%s: probed IRQ %d failed, using default.\n", | |
1381 | hwif->name, hwif->irq); | |
1382 | ||
1383 | done: | |
1384 | init_gendisk(hwif); | |
e3a59b4d HR |
1385 | |
1386 | ide_acpi_init(hwif); | |
1387 | ||
1da177e4 LT |
1388 | hwif->present = 1; /* success */ |
1389 | return 1; | |
1390 | ||
1391 | out: | |
1392 | unregister_blkdev(hwif->major, hwif->name); | |
1393 | return 0; | |
1394 | } | |
1395 | ||
1396 | int ideprobe_init (void) | |
1397 | { | |
1398 | unsigned int index; | |
1399 | int probe[MAX_HWIFS]; | |
1400 | ||
1401 | memset(probe, 0, MAX_HWIFS * sizeof(int)); | |
1402 | for (index = 0; index < MAX_HWIFS; ++index) | |
1403 | probe[index] = !ide_hwifs[index].present; | |
1404 | ||
1405 | for (index = 0; index < MAX_HWIFS; ++index) | |
1406 | if (probe[index]) | |
1407 | probe_hwif(&ide_hwifs[index]); | |
1408 | for (index = 0; index < MAX_HWIFS; ++index) | |
1409 | if (probe[index]) | |
1410 | hwif_init(&ide_hwifs[index]); | |
1411 | for (index = 0; index < MAX_HWIFS; ++index) { | |
1412 | if (probe[index]) { | |
1413 | ide_hwif_t *hwif = &ide_hwifs[index]; | |
1414 | int unit; | |
1415 | if (!hwif->present) | |
1416 | continue; | |
1417 | if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) | |
1418 | hwif->chipset = ide_generic; | |
1419 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
349ae23f RD |
1420 | if (hwif->drives[unit].present) { |
1421 | int ret = device_register( | |
1422 | &hwif->drives[unit].gendev); | |
1423 | if (ret < 0) | |
1424 | printk(KERN_WARNING "IDE: %s: " | |
1425 | "device_register error: %d\n", | |
1426 | __FUNCTION__, ret); | |
1427 | } | |
1da177e4 LT |
1428 | } |
1429 | } | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | EXPORT_SYMBOL_GPL(ideprobe_init); |