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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 | ||
34 | #undef REALLY_SLOW_IO /* most systems can safely undef this */ | |
35 | ||
36 | #include <linux/config.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/types.h> | |
39 | #include <linux/string.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/timer.h> | |
42 | #include <linux/mm.h> | |
43 | #include <linux/interrupt.h> | |
44 | #include <linux/major.h> | |
45 | #include <linux/errno.h> | |
46 | #include <linux/genhd.h> | |
47 | #include <linux/slab.h> | |
48 | #include <linux/delay.h> | |
49 | #include <linux/ide.h> | |
8604affd | 50 | #include <linux/devfs_fs_kernel.h> |
1da177e4 LT |
51 | #include <linux/spinlock.h> |
52 | #include <linux/kmod.h> | |
53 | #include <linux/pci.h> | |
54 | ||
55 | #include <asm/byteorder.h> | |
56 | #include <asm/irq.h> | |
57 | #include <asm/uaccess.h> | |
58 | #include <asm/io.h> | |
59 | ||
60 | /** | |
61 | * generic_id - add a generic drive id | |
62 | * @drive: drive to make an ID block for | |
63 | * | |
64 | * Add a fake id field to the drive we are passed. This allows | |
65 | * use to skip a ton of NULL checks (which people always miss) | |
66 | * and make drive properties unconditional outside of this file | |
67 | */ | |
68 | ||
69 | static void generic_id(ide_drive_t *drive) | |
70 | { | |
71 | drive->id->cyls = drive->cyl; | |
72 | drive->id->heads = drive->head; | |
73 | drive->id->sectors = drive->sect; | |
74 | drive->id->cur_cyls = drive->cyl; | |
75 | drive->id->cur_heads = drive->head; | |
76 | drive->id->cur_sectors = drive->sect; | |
77 | } | |
78 | ||
79 | static void ide_disk_init_chs(ide_drive_t *drive) | |
80 | { | |
81 | struct hd_driveid *id = drive->id; | |
82 | ||
83 | /* Extract geometry if we did not already have one for the drive */ | |
84 | if (!drive->cyl || !drive->head || !drive->sect) { | |
85 | drive->cyl = drive->bios_cyl = id->cyls; | |
86 | drive->head = drive->bios_head = id->heads; | |
87 | drive->sect = drive->bios_sect = id->sectors; | |
88 | } | |
89 | ||
90 | /* Handle logical geometry translation by the drive */ | |
91 | if ((id->field_valid & 1) && id->cur_cyls && | |
92 | id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { | |
93 | drive->cyl = id->cur_cyls; | |
94 | drive->head = id->cur_heads; | |
95 | drive->sect = id->cur_sectors; | |
96 | } | |
97 | ||
98 | /* Use physical geometry if what we have still makes no sense */ | |
99 | if (drive->head > 16 && id->heads && id->heads <= 16) { | |
100 | drive->cyl = id->cyls; | |
101 | drive->head = id->heads; | |
102 | drive->sect = id->sectors; | |
103 | } | |
104 | } | |
105 | ||
106 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
107 | { | |
108 | struct hd_driveid *id = drive->id; | |
109 | ||
110 | drive->mult_count = 0; | |
111 | if (id->max_multsect) { | |
112 | #ifdef CONFIG_IDEDISK_MULTI_MODE | |
113 | id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; | |
114 | id->multsect_valid = id->multsect ? 1 : 0; | |
115 | drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; | |
116 | drive->special.b.set_multmode = drive->mult_req ? 1 : 0; | |
117 | #else /* original, pre IDE-NFG, per request of AC */ | |
118 | drive->mult_req = INITIAL_MULT_COUNT; | |
119 | if (drive->mult_req > id->max_multsect) | |
120 | drive->mult_req = id->max_multsect; | |
121 | if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) | |
122 | drive->special.b.set_multmode = 1; | |
123 | #endif | |
124 | } | |
125 | } | |
126 | ||
127 | /** | |
128 | * drive_is_flashcard - check for compact flash | |
129 | * @drive: drive to check | |
130 | * | |
131 | * CompactFlash cards and their brethern pretend to be removable | |
132 | * hard disks, except: | |
133 | * (1) they never have a slave unit, and | |
134 | * (2) they don't have doorlock mechanisms. | |
135 | * This test catches them, and is invoked elsewhere when setting | |
136 | * appropriate config bits. | |
137 | * | |
138 | * FIXME: This treatment is probably applicable for *all* PCMCIA (PC CARD) | |
139 | * devices, so in linux 2.3.x we should change this to just treat all | |
140 | * PCMCIA drives this way, and get rid of the model-name tests below | |
141 | * (too big of an interface change for 2.4.x). | |
142 | * At that time, we might also consider parameterizing the timeouts and | |
143 | * retries, since these are MUCH faster than mechanical drives. -M.Lord | |
144 | */ | |
145 | ||
146 | static inline int drive_is_flashcard (ide_drive_t *drive) | |
147 | { | |
148 | struct hd_driveid *id = drive->id; | |
149 | ||
150 | if (drive->removable) { | |
151 | if (id->config == 0x848a) return 1; /* CompactFlash */ | |
152 | if (!strncmp(id->model, "KODAK ATA_FLASH", 15) /* Kodak */ | |
153 | || !strncmp(id->model, "Hitachi CV", 10) /* Hitachi */ | |
154 | || !strncmp(id->model, "SunDisk SDCFB", 13) /* old SanDisk */ | |
155 | || !strncmp(id->model, "SanDisk SDCFB", 13) /* SanDisk */ | |
156 | || !strncmp(id->model, "HAGIWARA HPC", 12) /* Hagiwara */ | |
157 | || !strncmp(id->model, "LEXAR ATA_FLASH", 15) /* Lexar */ | |
158 | || !strncmp(id->model, "ATA_FLASH", 9)) /* Simple Tech */ | |
159 | { | |
160 | return 1; /* yes, it is a flash memory card */ | |
161 | } | |
162 | } | |
163 | return 0; /* no, it is not a flash memory card */ | |
164 | } | |
165 | ||
166 | /** | |
167 | * do_identify - identify a drive | |
168 | * @drive: drive to identify | |
169 | * @cmd: command used | |
170 | * | |
171 | * Called when we have issued a drive identify command to | |
172 | * read and parse the results. This function is run with | |
173 | * interrupts disabled. | |
174 | */ | |
175 | ||
176 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
177 | { | |
178 | ide_hwif_t *hwif = HWIF(drive); | |
179 | int bswap = 1; | |
180 | struct hd_driveid *id; | |
181 | ||
182 | id = drive->id; | |
183 | /* read 512 bytes of id info */ | |
184 | hwif->ata_input_data(drive, id, SECTOR_WORDS); | |
185 | ||
186 | drive->id_read = 1; | |
187 | local_irq_enable(); | |
188 | ide_fix_driveid(id); | |
189 | ||
190 | #if defined (CONFIG_SCSI_EATA_DMA) || defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) | |
191 | /* | |
192 | * EATA SCSI controllers do a hardware ATA emulation: | |
193 | * Ignore them if there is a driver for them available. | |
194 | */ | |
195 | if ((id->model[0] == 'P' && id->model[1] == 'M') || | |
196 | (id->model[0] == 'S' && id->model[1] == 'K')) { | |
197 | printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); | |
198 | goto err_misc; | |
199 | } | |
200 | #endif /* CONFIG_SCSI_EATA_DMA || CONFIG_SCSI_EATA_PIO */ | |
201 | ||
202 | /* | |
203 | * WIN_IDENTIFY returns little-endian info, | |
204 | * WIN_PIDENTIFY *usually* returns little-endian info. | |
205 | */ | |
206 | if (cmd == WIN_PIDENTIFY) { | |
207 | if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ | |
208 | || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ | |
209 | || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ | |
210 | /* Vertos drives may still be weird */ | |
211 | bswap ^= 1; | |
212 | } | |
213 | ide_fixstring(id->model, sizeof(id->model), bswap); | |
214 | ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); | |
215 | ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); | |
216 | ||
217 | if (strstr(id->model, "E X A B Y T E N E S T")) | |
218 | goto err_misc; | |
219 | ||
220 | /* we depend on this a lot! */ | |
221 | id->model[sizeof(id->model)-1] = '\0'; | |
222 | printk("%s: %s, ", drive->name, id->model); | |
223 | drive->present = 1; | |
224 | drive->dead = 0; | |
225 | ||
226 | /* | |
227 | * Check for an ATAPI device | |
228 | */ | |
229 | if (cmd == WIN_PIDENTIFY) { | |
230 | u8 type = (id->config >> 8) & 0x1f; | |
231 | printk("ATAPI "); | |
232 | switch (type) { | |
233 | case ide_floppy: | |
234 | if (!strstr(id->model, "CD-ROM")) { | |
235 | if (!strstr(id->model, "oppy") && | |
236 | !strstr(id->model, "poyp") && | |
237 | !strstr(id->model, "ZIP")) | |
238 | printk("cdrom or floppy?, assuming "); | |
239 | if (drive->media != ide_cdrom) { | |
240 | printk ("FLOPPY"); | |
241 | drive->removable = 1; | |
242 | break; | |
243 | } | |
244 | } | |
245 | /* Early cdrom models used zero */ | |
246 | type = ide_cdrom; | |
247 | case ide_cdrom: | |
248 | drive->removable = 1; | |
249 | #ifdef CONFIG_PPC | |
250 | /* kludge for Apple PowerBook internal zip */ | |
251 | if (!strstr(id->model, "CD-ROM") && | |
252 | strstr(id->model, "ZIP")) { | |
253 | printk ("FLOPPY"); | |
254 | type = ide_floppy; | |
255 | break; | |
256 | } | |
257 | #endif | |
258 | printk ("CD/DVD-ROM"); | |
259 | break; | |
260 | case ide_tape: | |
261 | printk ("TAPE"); | |
262 | break; | |
263 | case ide_optical: | |
264 | printk ("OPTICAL"); | |
265 | drive->removable = 1; | |
266 | break; | |
267 | default: | |
268 | printk("UNKNOWN (type %d)", type); | |
269 | break; | |
270 | } | |
271 | printk (" drive\n"); | |
272 | drive->media = type; | |
273 | /* an ATAPI device ignores DRDY */ | |
274 | drive->ready_stat = 0; | |
275 | return; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Not an ATAPI device: looks like a "regular" hard disk | |
280 | */ | |
281 | if (id->config & (1<<7)) | |
282 | drive->removable = 1; | |
283 | ||
284 | if (drive_is_flashcard(drive)) | |
285 | drive->is_flash = 1; | |
286 | drive->media = ide_disk; | |
287 | printk("%s DISK drive\n", (drive->is_flash) ? "CFA" : "ATA" ); | |
288 | QUIRK_LIST(drive); | |
289 | return; | |
290 | ||
291 | err_misc: | |
292 | kfree(id); | |
293 | drive->present = 0; | |
294 | return; | |
295 | } | |
296 | ||
297 | /** | |
298 | * actual_try_to_identify - send ata/atapi identify | |
299 | * @drive: drive to identify | |
300 | * @cmd: command to use | |
301 | * | |
302 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
303 | * and waits for a response. It also monitors irqs while this is | |
304 | * happening, in hope of automatically determining which one is | |
305 | * being used by the interface. | |
306 | * | |
307 | * Returns: 0 device was identified | |
308 | * 1 device timed-out (no response to identify request) | |
309 | * 2 device aborted the command (refused to identify itself) | |
310 | */ | |
311 | ||
312 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
313 | { | |
314 | ide_hwif_t *hwif = HWIF(drive); | |
315 | int rc; | |
316 | unsigned long hd_status; | |
317 | unsigned long timeout; | |
318 | u8 s = 0, a = 0; | |
319 | ||
320 | /* take a deep breath */ | |
321 | msleep(50); | |
322 | ||
323 | if (IDE_CONTROL_REG) { | |
324 | a = hwif->INB(IDE_ALTSTATUS_REG); | |
325 | s = hwif->INB(IDE_STATUS_REG); | |
326 | if ((a ^ s) & ~INDEX_STAT) { | |
327 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " | |
328 | "ALTSTATUS(0x%02x)\n", drive->name, s, a); | |
329 | /* ancient Seagate drives, broken interfaces */ | |
330 | hd_status = IDE_STATUS_REG; | |
331 | } else { | |
332 | /* use non-intrusive polling */ | |
333 | hd_status = IDE_ALTSTATUS_REG; | |
334 | } | |
335 | } else | |
336 | hd_status = IDE_STATUS_REG; | |
337 | ||
338 | /* set features register for atapi | |
339 | * identify command to be sure of reply | |
340 | */ | |
341 | if ((cmd == WIN_PIDENTIFY)) | |
342 | /* disable dma & overlap */ | |
343 | hwif->OUTB(0, IDE_FEATURE_REG); | |
344 | ||
345 | /* ask drive for ID */ | |
346 | hwif->OUTB(cmd, IDE_COMMAND_REG); | |
347 | ||
348 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; | |
349 | timeout += jiffies; | |
350 | do { | |
351 | if (time_after(jiffies, timeout)) { | |
352 | /* drive timed-out */ | |
353 | return 1; | |
354 | } | |
355 | /* give drive a breather */ | |
356 | msleep(50); | |
357 | } while ((hwif->INB(hd_status)) & BUSY_STAT); | |
358 | ||
359 | /* wait for IRQ and DRQ_STAT */ | |
360 | msleep(50); | |
361 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { | |
362 | unsigned long flags; | |
363 | ||
364 | /* local CPU only; some systems need this */ | |
365 | local_irq_save(flags); | |
366 | /* drive returned ID */ | |
367 | do_identify(drive, cmd); | |
368 | /* drive responded with ID */ | |
369 | rc = 0; | |
370 | /* clear drive IRQ */ | |
371 | (void) hwif->INB(IDE_STATUS_REG); | |
372 | local_irq_restore(flags); | |
373 | } else { | |
374 | /* drive refused ID */ | |
375 | rc = 2; | |
376 | } | |
377 | return rc; | |
378 | } | |
379 | ||
380 | /** | |
381 | * try_to_identify - try to identify a drive | |
382 | * @drive: drive to probe | |
383 | * @cmd: command to use | |
384 | * | |
385 | * Issue the identify command and then do IRQ probing to | |
386 | * complete the identification when needed by finding the | |
387 | * IRQ the drive is attached to | |
388 | */ | |
389 | ||
390 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
391 | { | |
392 | ide_hwif_t *hwif = HWIF(drive); | |
393 | int retval; | |
394 | int autoprobe = 0; | |
395 | unsigned long cookie = 0; | |
396 | ||
397 | /* | |
398 | * Disable device irq unless we need to | |
399 | * probe for it. Otherwise we'll get spurious | |
400 | * interrupts during the identify-phase that | |
401 | * the irq handler isn't expecting. | |
402 | */ | |
403 | if (IDE_CONTROL_REG) { | |
404 | u8 ctl = drive->ctl | 2; | |
405 | if (!hwif->irq) { | |
406 | autoprobe = 1; | |
407 | cookie = probe_irq_on(); | |
408 | /* enable device irq */ | |
409 | ctl &= ~2; | |
410 | } | |
411 | hwif->OUTB(ctl, IDE_CONTROL_REG); | |
412 | } | |
413 | ||
414 | retval = actual_try_to_identify(drive, cmd); | |
415 | ||
416 | if (autoprobe) { | |
417 | int irq; | |
418 | /* mask device irq */ | |
419 | hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); | |
420 | /* clear drive IRQ */ | |
421 | (void) hwif->INB(IDE_STATUS_REG); | |
422 | udelay(5); | |
423 | irq = probe_irq_off(cookie); | |
424 | if (!hwif->irq) { | |
425 | if (irq > 0) { | |
426 | hwif->irq = irq; | |
427 | } else { | |
428 | /* Mmmm.. multiple IRQs.. | |
429 | * don't know which was ours | |
430 | */ | |
431 | printk("%s: IRQ probe failed (0x%lx)\n", | |
432 | drive->name, cookie); | |
433 | } | |
434 | } | |
435 | } | |
436 | return retval; | |
437 | } | |
438 | ||
439 | ||
440 | /** | |
441 | * do_probe - probe an IDE device | |
442 | * @drive: drive to probe | |
443 | * @cmd: command to use | |
444 | * | |
445 | * do_probe() has the difficult job of finding a drive if it exists, | |
446 | * without getting hung up if it doesn't exist, without trampling on | |
447 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
448 | * | |
449 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
450 | * but does not respond right away, the probe will "hang in there" | |
451 | * for the maximum wait time (about 30 seconds), otherwise it will | |
452 | * exit much more quickly. | |
453 | * | |
454 | * Returns: 0 device was identified | |
455 | * 1 device timed-out (no response to identify request) | |
456 | * 2 device aborted the command (refused to identify itself) | |
457 | * 3 bad status from device (possible for ATAPI drives) | |
458 | * 4 probe was not attempted because failure was obvious | |
459 | */ | |
460 | ||
461 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
462 | { | |
463 | int rc; | |
464 | ide_hwif_t *hwif = HWIF(drive); | |
465 | ||
466 | if (drive->present) { | |
467 | /* avoid waiting for inappropriate probes */ | |
468 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) | |
469 | return 4; | |
470 | } | |
471 | #ifdef DEBUG | |
472 | printk("probing for %s: present=%d, media=%d, probetype=%s\n", | |
473 | drive->name, drive->present, drive->media, | |
474 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); | |
475 | #endif | |
476 | ||
477 | /* needed for some systems | |
478 | * (e.g. crw9624 as drive0 with disk as slave) | |
479 | */ | |
480 | msleep(50); | |
481 | SELECT_DRIVE(drive); | |
482 | msleep(50); | |
483 | if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { | |
484 | if (drive->select.b.unit != 0) { | |
485 | /* exit with drive0 selected */ | |
486 | SELECT_DRIVE(&hwif->drives[0]); | |
487 | /* allow BUSY_STAT to assert & clear */ | |
488 | msleep(50); | |
489 | } | |
490 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
491 | return 3; | |
492 | } | |
493 | ||
494 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || | |
495 | drive->present || cmd == WIN_PIDENTIFY) { | |
496 | /* send cmd and wait */ | |
497 | if ((rc = try_to_identify(drive, cmd))) { | |
498 | /* failed: try again */ | |
499 | rc = try_to_identify(drive,cmd); | |
500 | } | |
501 | if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) | |
502 | return 4; | |
503 | ||
504 | if ((rc == 1 && cmd == WIN_PIDENTIFY) && | |
505 | ((drive->autotune == IDE_TUNE_DEFAULT) || | |
506 | (drive->autotune == IDE_TUNE_AUTO))) { | |
507 | unsigned long timeout; | |
508 | printk("%s: no response (status = 0x%02x), " | |
509 | "resetting drive\n", drive->name, | |
510 | hwif->INB(IDE_STATUS_REG)); | |
511 | msleep(50); | |
512 | hwif->OUTB(drive->select.all, IDE_SELECT_REG); | |
513 | msleep(50); | |
514 | hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); | |
515 | timeout = jiffies; | |
516 | while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && | |
517 | time_before(jiffies, timeout + WAIT_WORSTCASE)) | |
518 | msleep(50); | |
519 | rc = try_to_identify(drive, cmd); | |
520 | } | |
521 | if (rc == 1) | |
522 | printk("%s: no response (status = 0x%02x)\n", | |
523 | drive->name, hwif->INB(IDE_STATUS_REG)); | |
524 | /* ensure drive irq is clear */ | |
525 | (void) hwif->INB(IDE_STATUS_REG); | |
526 | } else { | |
527 | /* not present or maybe ATAPI */ | |
528 | rc = 3; | |
529 | } | |
530 | if (drive->select.b.unit != 0) { | |
531 | /* exit with drive0 selected */ | |
532 | SELECT_DRIVE(&hwif->drives[0]); | |
533 | msleep(50); | |
534 | /* ensure drive irq is clear */ | |
535 | (void) hwif->INB(IDE_STATUS_REG); | |
536 | } | |
537 | return rc; | |
538 | } | |
539 | ||
540 | /* | |
541 | * | |
542 | */ | |
543 | static void enable_nest (ide_drive_t *drive) | |
544 | { | |
545 | ide_hwif_t *hwif = HWIF(drive); | |
546 | unsigned long timeout; | |
547 | ||
548 | printk("%s: enabling %s -- ", hwif->name, drive->id->model); | |
549 | SELECT_DRIVE(drive); | |
550 | msleep(50); | |
551 | hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); | |
552 | timeout = jiffies + WAIT_WORSTCASE; | |
553 | do { | |
554 | if (time_after(jiffies, timeout)) { | |
555 | printk("failed (timeout)\n"); | |
556 | return; | |
557 | } | |
558 | msleep(50); | |
559 | } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); | |
560 | ||
561 | msleep(50); | |
562 | ||
563 | if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { | |
564 | printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); | |
565 | } else { | |
566 | printk("success\n"); | |
567 | } | |
568 | ||
569 | /* if !(success||timed-out) */ | |
570 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
571 | /* look for ATAPI device */ | |
572 | (void) do_probe(drive, WIN_PIDENTIFY); | |
573 | } | |
574 | } | |
575 | ||
576 | /** | |
577 | * probe_for_drives - upper level drive probe | |
578 | * @drive: drive to probe for | |
579 | * | |
580 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
581 | * and presents things to the user as needed. | |
582 | * | |
583 | * Returns: 0 no device was found | |
584 | * 1 device was found (note: drive->present might | |
585 | * still be 0) | |
586 | */ | |
587 | ||
588 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
589 | { | |
590 | /* | |
591 | * In order to keep things simple we have an id | |
592 | * block for all drives at all times. If the device | |
593 | * is pre ATA or refuses ATA/ATAPI identify we | |
594 | * will add faked data to this. | |
595 | * | |
596 | * Also note that 0 everywhere means "can't do X" | |
597 | */ | |
598 | ||
599 | drive->id = kmalloc(SECTOR_WORDS *4, GFP_KERNEL); | |
600 | drive->id_read = 0; | |
601 | if(drive->id == NULL) | |
602 | { | |
603 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
604 | return 0; | |
605 | } | |
606 | memset(drive->id, 0, SECTOR_WORDS * 4); | |
607 | strcpy(drive->id->model, "UNKNOWN"); | |
608 | ||
609 | /* skip probing? */ | |
610 | if (!drive->noprobe) | |
611 | { | |
612 | /* if !(success||timed-out) */ | |
613 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
614 | /* look for ATAPI device */ | |
615 | (void) do_probe(drive, WIN_PIDENTIFY); | |
616 | } | |
617 | if (strstr(drive->id->model, "E X A B Y T E N E S T")) | |
618 | enable_nest(drive); | |
619 | if (!drive->present) | |
620 | /* drive not found */ | |
621 | return 0; | |
622 | ||
623 | /* identification failed? */ | |
624 | if (!drive->id_read) { | |
625 | if (drive->media == ide_disk) { | |
626 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
627 | drive->name, drive->cyl, | |
628 | drive->head, drive->sect); | |
629 | } else if (drive->media == ide_cdrom) { | |
630 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
631 | } else { | |
632 | /* nuke it */ | |
633 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
634 | drive->present = 0; | |
635 | } | |
636 | } | |
637 | /* drive was found */ | |
638 | } | |
639 | if(!drive->present) | |
640 | return 0; | |
641 | /* The drive wasn't being helpful. Add generic info only */ | |
642 | if (drive->id_read == 0) { | |
643 | generic_id(drive); | |
644 | return 1; | |
645 | } | |
646 | ||
647 | if (drive->media == ide_disk) { | |
648 | ide_disk_init_chs(drive); | |
649 | ide_disk_init_mult_count(drive); | |
650 | } | |
651 | ||
652 | return drive->present; | |
653 | } | |
654 | ||
655 | static void hwif_release_dev (struct device *dev) | |
656 | { | |
657 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
658 | ||
659 | up(&hwif->gendev_rel_sem); | |
660 | } | |
661 | ||
662 | static void hwif_register (ide_hwif_t *hwif) | |
663 | { | |
664 | /* register with global device tree */ | |
665 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
666 | hwif->gendev.driver_data = hwif; | |
667 | if (hwif->gendev.parent == NULL) { | |
668 | if (hwif->pci_dev) | |
669 | hwif->gendev.parent = &hwif->pci_dev->dev; | |
670 | else | |
671 | /* Would like to do = &device_legacy */ | |
672 | hwif->gendev.parent = NULL; | |
673 | } | |
674 | hwif->gendev.release = hwif_release_dev; | |
675 | device_register(&hwif->gendev); | |
676 | } | |
677 | ||
678 | static int wait_hwif_ready(ide_hwif_t *hwif) | |
679 | { | |
680 | int rc; | |
681 | ||
682 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
683 | ||
684 | /* Let HW settle down a bit from whatever init state we | |
685 | * come from */ | |
686 | mdelay(2); | |
687 | ||
688 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
689 | * I know of at least one disk who takes 31 seconds, I use 35 | |
690 | * here to be safe | |
691 | */ | |
692 | rc = ide_wait_not_busy(hwif, 35000); | |
693 | if (rc) | |
694 | return rc; | |
695 | ||
696 | /* Now make sure both master & slave are ready */ | |
697 | SELECT_DRIVE(&hwif->drives[0]); | |
698 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
699 | mdelay(2); | |
284e4238 | 700 | rc = ide_wait_not_busy(hwif, 35000); |
1da177e4 LT |
701 | if (rc) |
702 | return rc; | |
703 | SELECT_DRIVE(&hwif->drives[1]); | |
704 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
705 | mdelay(2); | |
284e4238 | 706 | rc = ide_wait_not_busy(hwif, 35000); |
1da177e4 LT |
707 | |
708 | /* Exit function with master reselected (let's be sane) */ | |
709 | SELECT_DRIVE(&hwif->drives[0]); | |
710 | ||
711 | return rc; | |
712 | } | |
713 | ||
714 | /** | |
715 | * ide_undecoded_slave - look for bad CF adapters | |
716 | * @hwif: interface | |
717 | * | |
718 | * Analyse the drives on the interface and attempt to decide if we | |
719 | * have the same drive viewed twice. This occurs with crap CF adapters | |
720 | * and PCMCIA sometimes. | |
721 | */ | |
722 | ||
723 | void ide_undecoded_slave(ide_hwif_t *hwif) | |
724 | { | |
725 | ide_drive_t *drive0 = &hwif->drives[0]; | |
726 | ide_drive_t *drive1 = &hwif->drives[1]; | |
727 | ||
728 | if (drive0->present == 0 || drive1->present == 0) | |
729 | return; | |
730 | ||
731 | /* If the models don't match they are not the same product */ | |
732 | if (strcmp(drive0->id->model, drive1->id->model)) | |
733 | return; | |
734 | ||
735 | /* Serial numbers do not match */ | |
736 | if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) | |
737 | return; | |
738 | ||
739 | /* No serial number, thankfully very rare for CF */ | |
740 | if (drive0->id->serial_no[0] == 0) | |
741 | return; | |
742 | ||
743 | /* Appears to be an IDE flash adapter with decode bugs */ | |
744 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
745 | ||
746 | drive1->present = 0; | |
747 | } | |
748 | ||
749 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
750 | ||
751 | /* | |
752 | * This routine only knows how to look for drive units 0 and 1 | |
753 | * on an interface, so any setting of MAX_DRIVES > 2 won't work here. | |
754 | */ | |
755 | static void probe_hwif(ide_hwif_t *hwif) | |
756 | { | |
757 | unsigned int unit; | |
758 | unsigned long flags; | |
759 | unsigned int irqd; | |
760 | ||
761 | if (hwif->noprobe) | |
762 | return; | |
763 | ||
764 | if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && | |
765 | (ide_hwif_request_regions(hwif))) { | |
766 | u16 msgout = 0; | |
767 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
768 | ide_drive_t *drive = &hwif->drives[unit]; | |
769 | if (drive->present) { | |
770 | drive->present = 0; | |
771 | printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", | |
772 | drive->name); | |
773 | msgout = 1; | |
774 | } | |
775 | } | |
776 | if (!msgout) | |
777 | printk(KERN_ERR "%s: ports already in use, skipping probe\n", | |
778 | hwif->name); | |
779 | return; | |
780 | } | |
781 | ||
782 | /* | |
783 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
784 | * we'll install our IRQ driver much later... | |
785 | */ | |
786 | irqd = hwif->irq; | |
787 | if (irqd) | |
788 | disable_irq(hwif->irq); | |
789 | ||
790 | local_irq_set(flags); | |
791 | ||
792 | /* This is needed on some PPCs and a bunch of BIOS-less embedded | |
793 | * platforms. Typical cases are: | |
794 | * | |
795 | * - The firmware hard reset the disk before booting the kernel, | |
796 | * the drive is still doing it's poweron-reset sequence, that | |
797 | * can take up to 30 seconds | |
798 | * - The firmware does nothing (or no firmware), the device is | |
799 | * still in POST state (same as above actually). | |
800 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
801 | * their reset sequence even when they are non-selected slave | |
802 | * devices, thus preventing discovery of the main HD | |
803 | * | |
804 | * Doing this wait-for-busy should not harm any existing configuration | |
805 | * (at least things won't be worse than what current code does, that | |
806 | * is blindly go & talk to the drive) and fix some issues like the | |
807 | * above. | |
808 | * | |
809 | * BenH. | |
810 | */ | |
811 | if (wait_hwif_ready(hwif) == -EBUSY) | |
812 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); | |
813 | ||
814 | /* | |
815 | * Second drive should only exist if first drive was found, | |
816 | * but a lot of cdrom drives are configured as single slaves. | |
817 | */ | |
818 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
819 | ide_drive_t *drive = &hwif->drives[unit]; | |
820 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
821 | (void) probe_for_drive(drive); | |
822 | if (drive->present && !hwif->present) { | |
823 | hwif->present = 1; | |
824 | if (hwif->chipset != ide_4drives || | |
825 | !hwif->mate || | |
826 | !hwif->mate->present) { | |
827 | hwif_register(hwif); | |
828 | } | |
829 | } | |
830 | } | |
831 | if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { | |
832 | unsigned long timeout = jiffies + WAIT_WORSTCASE; | |
833 | u8 stat; | |
834 | ||
835 | printk(KERN_WARNING "%s: reset\n", hwif->name); | |
836 | hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
837 | udelay(10); | |
838 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
839 | do { | |
840 | msleep(50); | |
841 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); | |
842 | } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); | |
843 | ||
844 | } | |
845 | local_irq_restore(flags); | |
846 | /* | |
847 | * Use cached IRQ number. It might be (and is...) changed by probe | |
848 | * code above | |
849 | */ | |
850 | if (irqd) | |
851 | enable_irq(irqd); | |
852 | ||
853 | if (!hwif->present) { | |
854 | ide_hwif_release_regions(hwif); | |
855 | return; | |
856 | } | |
857 | ||
858 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
859 | ide_drive_t *drive = &hwif->drives[unit]; | |
860 | ||
861 | if (drive->present) { | |
862 | if (hwif->tuneproc != NULL && | |
863 | drive->autotune == IDE_TUNE_AUTO) | |
864 | /* auto-tune PIO mode */ | |
865 | hwif->tuneproc(drive, 255); | |
866 | ||
867 | if (drive->autotune != IDE_TUNE_DEFAULT && | |
868 | drive->autotune != IDE_TUNE_AUTO) | |
869 | continue; | |
870 | ||
871 | drive->nice1 = 1; | |
872 | ||
873 | /* | |
874 | * MAJOR HACK BARF :-/ | |
875 | * | |
876 | * FIXME: chipsets own this cruft! | |
877 | */ | |
878 | /* | |
879 | * Move here to prevent module loading clashing. | |
880 | */ | |
881 | // drive->autodma = hwif->autodma; | |
882 | if (hwif->ide_dma_check) { | |
883 | /* | |
884 | * Force DMAing for the beginning of the check. | |
885 | * Some chipsets appear to do interesting | |
886 | * things, if not checked and cleared. | |
887 | * PARANOIA!!! | |
888 | */ | |
889 | hwif->ide_dma_off_quietly(drive); | |
890 | #ifdef CONFIG_IDEDMA_ONLYDISK | |
891 | if (drive->media == ide_disk) | |
892 | #endif | |
893 | hwif->ide_dma_check(drive); | |
894 | } | |
895 | } | |
896 | } | |
897 | } | |
898 | ||
899 | static int hwif_init(ide_hwif_t *hwif); | |
900 | ||
901 | int probe_hwif_init_with_fixup(ide_hwif_t *hwif, void (*fixup)(ide_hwif_t *hwif)) | |
902 | { | |
903 | probe_hwif(hwif); | |
904 | ||
905 | if (fixup) | |
906 | fixup(hwif); | |
907 | ||
908 | if (!hwif_init(hwif)) { | |
909 | printk(KERN_INFO "%s: failed to initialize IDE interface\n", | |
910 | hwif->name); | |
911 | return -1; | |
912 | } | |
913 | ||
914 | if (hwif->present) { | |
915 | u16 unit = 0; | |
916 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
917 | ide_drive_t *drive = &hwif->drives[unit]; | |
918 | /* For now don't attach absent drives, we may | |
919 | want them on default or a new "empty" class | |
920 | for hotplug reprobing ? */ | |
921 | if (drive->present) { | |
8604affd | 922 | device_register(&drive->gendev); |
1da177e4 LT |
923 | } |
924 | } | |
925 | } | |
926 | return 0; | |
927 | } | |
928 | ||
929 | int probe_hwif_init(ide_hwif_t *hwif) | |
930 | { | |
931 | return probe_hwif_init_with_fixup(hwif, NULL); | |
932 | } | |
933 | ||
934 | EXPORT_SYMBOL(probe_hwif_init); | |
935 | ||
936 | #if MAX_HWIFS > 1 | |
937 | /* | |
938 | * save_match() is used to simplify logic in init_irq() below. | |
939 | * | |
940 | * A loophole here is that we may not know about a particular | |
941 | * hwif's irq until after that hwif is actually probed/initialized.. | |
942 | * This could be a problem for the case where an hwif is on a | |
943 | * dual interface that requires serialization (eg. cmd640) and another | |
944 | * hwif using one of the same irqs is initialized beforehand. | |
945 | * | |
946 | * This routine detects and reports such situations, but does not fix them. | |
947 | */ | |
948 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
949 | { | |
950 | ide_hwif_t *m = *match; | |
951 | ||
952 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
953 | if (!new->hwgroup) | |
954 | return; | |
955 | printk("%s: potential irq problem with %s and %s\n", | |
956 | hwif->name, new->name, m->name); | |
957 | } | |
958 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
959 | *match = new; | |
960 | } | |
961 | #endif /* MAX_HWIFS > 1 */ | |
962 | ||
963 | /* | |
964 | * init request queue | |
965 | */ | |
966 | static int ide_init_queue(ide_drive_t *drive) | |
967 | { | |
968 | request_queue_t *q; | |
969 | ide_hwif_t *hwif = HWIF(drive); | |
970 | int max_sectors = 256; | |
971 | int max_sg_entries = PRD_ENTRIES; | |
972 | ||
973 | /* | |
974 | * Our default set up assumes the normal IDE case, | |
975 | * that is 64K segmenting, standard PRD setup | |
976 | * and LBA28. Some drivers then impose their own | |
977 | * limits and LBA48 we could raise it but as yet | |
978 | * do not. | |
979 | */ | |
1946089a | 980 | |
556e58fe | 981 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
982 | if (!q) |
983 | return 1; | |
984 | ||
985 | q->queuedata = drive; | |
986 | blk_queue_segment_boundary(q, 0xffff); | |
987 | ||
988 | if (!hwif->rqsize) { | |
989 | if (hwif->no_lba48 || hwif->no_lba48_dma) | |
990 | hwif->rqsize = 256; | |
991 | else | |
992 | hwif->rqsize = 65536; | |
993 | } | |
994 | if (hwif->rqsize < max_sectors) | |
995 | max_sectors = hwif->rqsize; | |
996 | blk_queue_max_sectors(q, max_sectors); | |
997 | ||
998 | #ifdef CONFIG_PCI | |
999 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
1000 | * creates segments that don't completely match our boundary | |
1001 | * requirements and thus need to be broken up again. Because it | |
1002 | * doesn't align properly either, we may actually have to break up | |
1003 | * to more segments than what was we got in the first place, a max | |
1004 | * worst case is twice as many. | |
1005 | * This will be fixed once we teach pci_map_sg() about our boundary | |
1006 | * requirements, hopefully soon. *FIXME* | |
1007 | */ | |
1008 | if (!PCI_DMA_BUS_IS_PHYS) | |
1009 | max_sg_entries >>= 1; | |
1010 | #endif /* CONFIG_PCI */ | |
1011 | ||
1012 | blk_queue_max_hw_segments(q, max_sg_entries); | |
1013 | blk_queue_max_phys_segments(q, max_sg_entries); | |
1014 | ||
1015 | /* assign drive queue */ | |
1016 | drive->queue = q; | |
1017 | ||
1018 | /* needs drive->queue to be set */ | |
1019 | ide_toggle_bounce(drive, 1); | |
1020 | ||
1021 | /* enable led activity for disk drives only */ | |
1022 | if (drive->media == ide_disk && hwif->led_act) | |
1023 | blk_queue_activity_fn(q, hwif->led_act, drive); | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * This routine sets up the irq for an ide interface, and creates a new | |
1030 | * hwgroup for the irq/hwif if none was previously assigned. | |
1031 | * | |
1032 | * Much of the code is for correctly detecting/handling irq sharing | |
1033 | * and irq serialization situations. This is somewhat complex because | |
1034 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1035 | * | |
1036 | * The SA_INTERRUPT in sa_flags means ide_intr() is always entered with | |
1037 | * interrupts completely disabled. This can be bad for interrupt latency, | |
1038 | * but anything else has led to problems on some machines. We re-enable | |
1039 | * interrupts as much as we can safely do in most places. | |
1040 | */ | |
1041 | static int init_irq (ide_hwif_t *hwif) | |
1042 | { | |
1043 | unsigned int index; | |
1044 | ide_hwgroup_t *hwgroup; | |
1045 | ide_hwif_t *match = NULL; | |
1046 | ||
1047 | ||
1048 | BUG_ON(in_interrupt()); | |
1049 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
1050 | BUG_ON(hwif == NULL); |
1051 | ||
1da177e4 LT |
1052 | down(&ide_cfg_sem); |
1053 | hwif->hwgroup = NULL; | |
1054 | #if MAX_HWIFS > 1 | |
1055 | /* | |
1056 | * Group up with any other hwifs that share our irq(s). | |
1057 | */ | |
1058 | for (index = 0; index < MAX_HWIFS; index++) { | |
1059 | ide_hwif_t *h = &ide_hwifs[index]; | |
1060 | if (h->hwgroup) { /* scan only initialized hwif's */ | |
1061 | if (hwif->irq == h->irq) { | |
1062 | hwif->sharing_irq = h->sharing_irq = 1; | |
1063 | if (hwif->chipset != ide_pci || | |
1064 | h->chipset != ide_pci) { | |
1065 | save_match(hwif, h, &match); | |
1066 | } | |
1067 | } | |
1068 | if (hwif->serialized) { | |
1069 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1070 | save_match(hwif, h, &match); | |
1071 | } | |
1072 | if (h->serialized) { | |
1073 | if (h->mate && hwif->irq == h->mate->irq) | |
1074 | save_match(hwif, h, &match); | |
1075 | } | |
1076 | } | |
1077 | } | |
1078 | #endif /* MAX_HWIFS > 1 */ | |
1079 | /* | |
1080 | * If we are still without a hwgroup, then form a new one | |
1081 | */ | |
1082 | if (match) { | |
1083 | hwgroup = match->hwgroup; | |
1084 | hwif->hwgroup = hwgroup; | |
1085 | /* | |
1086 | * Link us into the hwgroup. | |
1087 | * This must be done early, do ensure that unexpected_intr | |
1088 | * can find the hwif and prevent irq storms. | |
1089 | * No drives are attached to the new hwif, choose_drive | |
1090 | * can't do anything stupid (yet). | |
1091 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1092 | * linked list, the first entry is the hwif that owns | |
1093 | * hwgroup->handler - do not change that. | |
1094 | */ | |
1095 | spin_lock_irq(&ide_lock); | |
1096 | hwif->next = hwgroup->hwif->next; | |
1097 | hwgroup->hwif->next = hwif; | |
1098 | spin_unlock_irq(&ide_lock); | |
1099 | } else { | |
1946089a | 1100 | hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), GFP_KERNEL, |
556e58fe | 1101 | hwif_to_node(hwif->drives[0].hwif)); |
1da177e4 LT |
1102 | if (!hwgroup) |
1103 | goto out_up; | |
1104 | ||
1105 | hwif->hwgroup = hwgroup; | |
1106 | ||
1107 | memset(hwgroup, 0, sizeof(ide_hwgroup_t)); | |
1108 | hwgroup->hwif = hwif->next = hwif; | |
1109 | hwgroup->rq = NULL; | |
1110 | hwgroup->handler = NULL; | |
1111 | hwgroup->drive = NULL; | |
1112 | hwgroup->busy = 0; | |
1113 | init_timer(&hwgroup->timer); | |
1114 | hwgroup->timer.function = &ide_timer_expiry; | |
1115 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Allocate the irq, if not already obtained for another hwif | |
1120 | */ | |
1121 | if (!match || match->irq != hwif->irq) { | |
1122 | int sa = SA_INTERRUPT; | |
1123 | #if defined(__mc68000__) || defined(CONFIG_APUS) | |
1124 | sa = SA_SHIRQ; | |
1125 | #endif /* __mc68000__ || CONFIG_APUS */ | |
1126 | ||
1127 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { | |
1128 | sa = SA_SHIRQ; | |
1129 | #ifndef CONFIG_IDEPCI_SHARE_IRQ | |
1130 | sa |= SA_INTERRUPT; | |
1131 | #endif /* CONFIG_IDEPCI_SHARE_IRQ */ | |
1132 | } | |
1133 | ||
1134 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) | |
1135 | /* clear nIEN */ | |
1136 | hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
1137 | ||
1138 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1139 | goto out_unlink; | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * For any present drive: | |
1144 | * - allocate the block device queue | |
1145 | * - link drive into the hwgroup | |
1146 | */ | |
1147 | for (index = 0; index < MAX_DRIVES; ++index) { | |
1148 | ide_drive_t *drive = &hwif->drives[index]; | |
1149 | if (!drive->present) | |
1150 | continue; | |
1151 | if (ide_init_queue(drive)) { | |
1152 | printk(KERN_ERR "ide: failed to init %s\n",drive->name); | |
1153 | continue; | |
1154 | } | |
1155 | spin_lock_irq(&ide_lock); | |
1156 | if (!hwgroup->drive) { | |
1157 | /* first drive for hwgroup. */ | |
1158 | drive->next = drive; | |
1159 | hwgroup->drive = drive; | |
1160 | hwgroup->hwif = HWIF(hwgroup->drive); | |
1161 | } else { | |
1162 | drive->next = hwgroup->drive->next; | |
1163 | hwgroup->drive->next = drive; | |
1164 | } | |
1165 | spin_unlock_irq(&ide_lock); | |
1166 | } | |
1167 | ||
1168 | #if !defined(__mc68000__) && !defined(CONFIG_APUS) && !defined(__sparc__) | |
1169 | printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, | |
1170 | hwif->io_ports[IDE_DATA_OFFSET], | |
1171 | hwif->io_ports[IDE_DATA_OFFSET]+7, | |
1172 | hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); | |
1173 | #elif defined(__sparc__) | |
1174 | printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %s", hwif->name, | |
1175 | hwif->io_ports[IDE_DATA_OFFSET], | |
1176 | hwif->io_ports[IDE_DATA_OFFSET]+7, | |
1177 | hwif->io_ports[IDE_CONTROL_OFFSET], __irq_itoa(hwif->irq)); | |
1178 | #else | |
1179 | printk("%s at 0x%08lx on irq %d", hwif->name, | |
1180 | hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); | |
1181 | #endif /* __mc68000__ && CONFIG_APUS */ | |
1182 | if (match) | |
1183 | printk(" (%sed with %s)", | |
1184 | hwif->sharing_irq ? "shar" : "serializ", match->name); | |
1185 | printk("\n"); | |
1186 | up(&ide_cfg_sem); | |
1187 | return 0; | |
1188 | out_unlink: | |
1189 | spin_lock_irq(&ide_lock); | |
1190 | if (hwif->next == hwif) { | |
1191 | BUG_ON(match); | |
1192 | BUG_ON(hwgroup->hwif != hwif); | |
1193 | kfree(hwgroup); | |
1194 | } else { | |
1195 | ide_hwif_t *g; | |
1196 | g = hwgroup->hwif; | |
1197 | while (g->next != hwif) | |
1198 | g = g->next; | |
1199 | g->next = hwif->next; | |
1200 | if (hwgroup->hwif == hwif) { | |
1201 | /* Impossible. */ | |
1202 | printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); | |
1203 | hwgroup->hwif = g; | |
1204 | } | |
1205 | BUG_ON(hwgroup->hwif == hwif); | |
1206 | } | |
1207 | spin_unlock_irq(&ide_lock); | |
1208 | out_up: | |
1209 | up(&ide_cfg_sem); | |
1210 | return 1; | |
1211 | } | |
1212 | ||
1213 | static int ata_lock(dev_t dev, void *data) | |
1214 | { | |
1215 | /* FIXME: we want to pin hwif down */ | |
1216 | return 0; | |
1217 | } | |
1218 | ||
1219 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1220 | { | |
1221 | ide_hwif_t *hwif = data; | |
1222 | int unit = *part >> PARTN_BITS; | |
1223 | ide_drive_t *drive = &hwif->drives[unit]; | |
1224 | if (!drive->present) | |
1225 | return NULL; | |
1226 | ||
1227 | if (drive->media == ide_disk) | |
1228 | request_module("ide-disk"); | |
1229 | if (drive->scsi) | |
1230 | request_module("ide-scsi"); | |
1231 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1232 | request_module("ide-cd"); | |
1233 | if (drive->media == ide_tape) | |
1234 | request_module("ide-tape"); | |
1235 | if (drive->media == ide_floppy) | |
1236 | request_module("ide-floppy"); | |
1237 | ||
1238 | return NULL; | |
1239 | } | |
1240 | ||
1241 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1242 | { | |
1243 | struct gendisk *p = data; | |
1244 | *part &= (1 << PARTN_BITS) - 1; | |
1245 | return &p->kobj; | |
1246 | } | |
1247 | ||
1248 | static int exact_lock(dev_t dev, void *data) | |
1249 | { | |
1250 | struct gendisk *p = data; | |
1251 | ||
1252 | if (!get_disk(p)) | |
1253 | return -1; | |
1254 | return 0; | |
1255 | } | |
1256 | ||
1257 | void ide_register_region(struct gendisk *disk) | |
1258 | { | |
1259 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1260 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1261 | } | |
1262 | ||
1263 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1264 | ||
1265 | void ide_unregister_region(struct gendisk *disk) | |
1266 | { | |
1267 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1268 | disk->minors); | |
1269 | } | |
1270 | ||
1271 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1272 | ||
1273 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1274 | { | |
1275 | ide_hwif_t *hwif = drive->hwif; | |
1276 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1277 | ||
1278 | disk->major = hwif->major; | |
1279 | disk->first_minor = unit << PARTN_BITS; | |
1280 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1281 | disk->queue = drive->queue; | |
1282 | } | |
1283 | ||
1284 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1285 | ||
8604affd BZ |
1286 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1287 | { | |
1288 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1289 | ||
1290 | if (drive == drive->next) { | |
1291 | /* special case: last drive from hwgroup. */ | |
1292 | BUG_ON(hwgroup->drive != drive); | |
1293 | hwgroup->drive = NULL; | |
1294 | } else { | |
1295 | ide_drive_t *walk; | |
1296 | ||
1297 | walk = hwgroup->drive; | |
1298 | while (walk->next != drive) | |
1299 | walk = walk->next; | |
1300 | walk->next = drive->next; | |
1301 | if (hwgroup->drive == drive) { | |
1302 | hwgroup->drive = drive->next; | |
1303 | hwgroup->hwif = hwgroup->drive->hwif; | |
1304 | } | |
1305 | } | |
1306 | BUG_ON(hwgroup->drive == drive); | |
1307 | } | |
1308 | ||
1da177e4 LT |
1309 | static void drive_release_dev (struct device *dev) |
1310 | { | |
1311 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1312 | ||
8604affd BZ |
1313 | spin_lock_irq(&ide_lock); |
1314 | if (drive->devfs_name[0] != '\0') { | |
1315 | devfs_remove(drive->devfs_name); | |
1316 | drive->devfs_name[0] = '\0'; | |
1317 | } | |
1318 | ide_remove_drive_from_hwgroup(drive); | |
1319 | if (drive->id != NULL) { | |
1320 | kfree(drive->id); | |
1321 | drive->id = NULL; | |
1322 | } | |
1323 | drive->present = 0; | |
1324 | /* Messed up locking ... */ | |
1325 | spin_unlock_irq(&ide_lock); | |
1326 | blk_cleanup_queue(drive->queue); | |
1327 | spin_lock_irq(&ide_lock); | |
1328 | drive->queue = NULL; | |
1329 | spin_unlock_irq(&ide_lock); | |
1330 | ||
1da177e4 LT |
1331 | up(&drive->gendev_rel_sem); |
1332 | } | |
1333 | ||
1334 | /* | |
1335 | * init_gendisk() (as opposed to ide_geninit) is called for each major device, | |
1336 | * after probing for drives, to allocate partition tables and other data | |
1337 | * structures needed for the routines in genhd.c. ide_geninit() gets called | |
1338 | * somewhat later, during the partition check. | |
1339 | */ | |
1340 | static void init_gendisk (ide_hwif_t *hwif) | |
1341 | { | |
1342 | unsigned int unit; | |
1343 | ||
1344 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
1345 | ide_drive_t * drive = &hwif->drives[unit]; | |
1346 | ide_add_generic_settings(drive); | |
1347 | snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", | |
1348 | hwif->index,unit); | |
1349 | drive->gendev.parent = &hwif->gendev; | |
1350 | drive->gendev.bus = &ide_bus_type; | |
1351 | drive->gendev.driver_data = drive; | |
1352 | drive->gendev.release = drive_release_dev; | |
1353 | if (drive->present) { | |
1da177e4 LT |
1354 | sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d", |
1355 | (hwif->channel && hwif->mate) ? | |
1356 | hwif->mate->index : hwif->index, | |
1357 | hwif->channel, unit, drive->lun); | |
1358 | } | |
1359 | } | |
1360 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, | |
1361 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1362 | } | |
1363 | ||
1364 | static int hwif_init(ide_hwif_t *hwif) | |
1365 | { | |
1366 | int old_irq; | |
1367 | ||
1368 | /* Return success if no device is connected */ | |
1369 | if (!hwif->present) | |
1370 | return 1; | |
1371 | ||
1372 | if (!hwif->irq) { | |
1373 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) | |
1374 | { | |
1375 | printk("%s: DISABLED, NO IRQ\n", hwif->name); | |
1376 | return (hwif->present = 0); | |
1377 | } | |
1378 | } | |
1379 | #ifdef CONFIG_BLK_DEV_HD | |
1380 | if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { | |
1381 | printk("%s: CANNOT SHARE IRQ WITH OLD " | |
1382 | "HARDDISK DRIVER (hd.c)\n", hwif->name); | |
1383 | return (hwif->present = 0); | |
1384 | } | |
1385 | #endif /* CONFIG_BLK_DEV_HD */ | |
1386 | ||
1387 | /* we set it back to 1 if all is ok below */ | |
1388 | hwif->present = 0; | |
1389 | ||
1390 | if (register_blkdev(hwif->major, hwif->name)) | |
1391 | return 0; | |
1392 | ||
1393 | if (!hwif->sg_max_nents) | |
1394 | hwif->sg_max_nents = PRD_ENTRIES; | |
1395 | ||
1396 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, | |
1397 | GFP_KERNEL); | |
1398 | if (!hwif->sg_table) { | |
1399 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1400 | goto out; | |
1401 | } | |
1402 | ||
1403 | if (init_irq(hwif) == 0) | |
1404 | goto done; | |
1405 | ||
1406 | old_irq = hwif->irq; | |
1407 | /* | |
1408 | * It failed to initialise. Find the default IRQ for | |
1409 | * this port and try that. | |
1410 | */ | |
1411 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { | |
1412 | printk("%s: Disabled unable to get IRQ %d.\n", | |
1413 | hwif->name, old_irq); | |
1414 | goto out; | |
1415 | } | |
1416 | if (init_irq(hwif)) { | |
1417 | printk("%s: probed IRQ %d and default IRQ %d failed.\n", | |
1418 | hwif->name, old_irq, hwif->irq); | |
1419 | goto out; | |
1420 | } | |
1421 | printk("%s: probed IRQ %d failed, using default.\n", | |
1422 | hwif->name, hwif->irq); | |
1423 | ||
1424 | done: | |
1425 | init_gendisk(hwif); | |
1426 | hwif->present = 1; /* success */ | |
1427 | return 1; | |
1428 | ||
1429 | out: | |
1430 | unregister_blkdev(hwif->major, hwif->name); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | int ideprobe_init (void) | |
1435 | { | |
1436 | unsigned int index; | |
1437 | int probe[MAX_HWIFS]; | |
1438 | ||
1439 | memset(probe, 0, MAX_HWIFS * sizeof(int)); | |
1440 | for (index = 0; index < MAX_HWIFS; ++index) | |
1441 | probe[index] = !ide_hwifs[index].present; | |
1442 | ||
1443 | for (index = 0; index < MAX_HWIFS; ++index) | |
1444 | if (probe[index]) | |
1445 | probe_hwif(&ide_hwifs[index]); | |
1446 | for (index = 0; index < MAX_HWIFS; ++index) | |
1447 | if (probe[index]) | |
1448 | hwif_init(&ide_hwifs[index]); | |
1449 | for (index = 0; index < MAX_HWIFS; ++index) { | |
1450 | if (probe[index]) { | |
1451 | ide_hwif_t *hwif = &ide_hwifs[index]; | |
1452 | int unit; | |
1453 | if (!hwif->present) | |
1454 | continue; | |
1455 | if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) | |
1456 | hwif->chipset = ide_generic; | |
1457 | for (unit = 0; unit < MAX_DRIVES; ++unit) | |
1458 | if (hwif->drives[unit].present) | |
8604affd | 1459 | device_register(&hwif->drives[unit].gendev); |
1da177e4 LT |
1460 | } |
1461 | } | |
1462 | return 0; | |
1463 | } | |
1464 | ||
1465 | EXPORT_SYMBOL_GPL(ideprobe_init); |