Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
3 | * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * Mostly written by Mark Lord <mlord@pobox.com> | |
8 | * and Gadi Oxman <gadio@netvision.net.il> | |
9 | * and Andre Hedrick <andre@linux-ide.org> | |
10 | * | |
11 | * See linux/MAINTAINERS for address of current maintainer. | |
12 | * | |
13 | * This is the IDE probe module, as evolved from hd.c and ide.c. | |
14 | * | |
bbe4d6d8 BZ |
15 | * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
16 | * by Andrea Arcangeli | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/genhd.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ide.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/kmod.h> | |
34 | #include <linux/pci.h> | |
dc81785d | 35 | #include <linux/scatterlist.h> |
1da177e4 LT |
36 | |
37 | #include <asm/byteorder.h> | |
38 | #include <asm/irq.h> | |
39 | #include <asm/uaccess.h> | |
40 | #include <asm/io.h> | |
41 | ||
42 | /** | |
43 | * generic_id - add a generic drive id | |
44 | * @drive: drive to make an ID block for | |
45 | * | |
46 | * Add a fake id field to the drive we are passed. This allows | |
47 | * use to skip a ton of NULL checks (which people always miss) | |
48 | * and make drive properties unconditional outside of this file | |
49 | */ | |
50 | ||
51 | static void generic_id(ide_drive_t *drive) | |
52 | { | |
4dde4492 BZ |
53 | u16 *id = drive->id; |
54 | ||
55 | id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; | |
56 | id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; | |
57 | id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; | |
1da177e4 LT |
58 | } |
59 | ||
60 | static void ide_disk_init_chs(ide_drive_t *drive) | |
61 | { | |
4dde4492 | 62 | u16 *id = drive->id; |
1da177e4 LT |
63 | |
64 | /* Extract geometry if we did not already have one for the drive */ | |
65 | if (!drive->cyl || !drive->head || !drive->sect) { | |
4dde4492 BZ |
66 | drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; |
67 | drive->head = drive->bios_head = id[ATA_ID_HEADS]; | |
68 | drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
69 | } |
70 | ||
71 | /* Handle logical geometry translation by the drive */ | |
dd8f46f6 | 72 | if (ata_id_current_chs_valid(id)) { |
4dde4492 BZ |
73 | drive->cyl = id[ATA_ID_CUR_CYLS]; |
74 | drive->head = id[ATA_ID_CUR_HEADS]; | |
75 | drive->sect = id[ATA_ID_CUR_SECTORS]; | |
1da177e4 LT |
76 | } |
77 | ||
78 | /* Use physical geometry if what we have still makes no sense */ | |
4dde4492 BZ |
79 | if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { |
80 | drive->cyl = id[ATA_ID_CYLS]; | |
81 | drive->head = id[ATA_ID_HEADS]; | |
82 | drive->sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
83 | } |
84 | } | |
85 | ||
86 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
87 | { | |
48fb2688 BZ |
88 | u16 *id = drive->id; |
89 | u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; | |
1da177e4 | 90 | |
48fb2688 | 91 | if (max_multsect) { |
48fb2688 BZ |
92 | if ((max_multsect / 2) > 1) |
93 | id[ATA_ID_MULTSECT] = max_multsect | 0x100; | |
94 | else | |
95 | id[ATA_ID_MULTSECT] &= ~0x1ff; | |
96 | ||
97 | drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; | |
7c51c17e BZ |
98 | |
99 | if (drive->mult_req) | |
df1f8378 | 100 | drive->special.b.set_multmode = 1; |
1da177e4 LT |
101 | } |
102 | } | |
103 | ||
24630dc6 BZ |
104 | static void ide_classify_ata_dev(ide_drive_t *drive) |
105 | { | |
106 | u16 *id = drive->id; | |
107 | char *m = (char *)&id[ATA_ID_PROD]; | |
108 | int is_cfa = ata_id_is_cfa(id); | |
109 | ||
110 | /* CF devices are *not* removable in Linux definition of the term */ | |
111 | if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) | |
112 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
113 | ||
114 | drive->media = ide_disk; | |
115 | ||
116 | if (!ata_id_has_unload(drive->id)) | |
117 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
118 | ||
119 | printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m, | |
120 | is_cfa ? "CFA" : "ATA"); | |
121 | } | |
122 | ||
123 | static void ide_classify_atapi_dev(ide_drive_t *drive) | |
124 | { | |
125 | u16 *id = drive->id; | |
126 | char *m = (char *)&id[ATA_ID_PROD]; | |
127 | u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; | |
128 | ||
129 | printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m); | |
130 | switch (type) { | |
131 | case ide_floppy: | |
132 | if (!strstr(m, "CD-ROM")) { | |
133 | if (!strstr(m, "oppy") && | |
134 | !strstr(m, "poyp") && | |
135 | !strstr(m, "ZIP")) | |
136 | printk(KERN_CONT "cdrom or floppy?, assuming "); | |
137 | if (drive->media != ide_cdrom) { | |
138 | printk(KERN_CONT "FLOPPY"); | |
139 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
140 | break; | |
141 | } | |
142 | } | |
143 | /* Early cdrom models used zero */ | |
144 | type = ide_cdrom; | |
145 | case ide_cdrom: | |
146 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
147 | #ifdef CONFIG_PPC | |
148 | /* kludge for Apple PowerBook internal zip */ | |
149 | if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { | |
150 | printk(KERN_CONT "FLOPPY"); | |
151 | type = ide_floppy; | |
152 | break; | |
153 | } | |
154 | #endif | |
155 | printk(KERN_CONT "CD/DVD-ROM"); | |
156 | break; | |
157 | case ide_tape: | |
158 | printk(KERN_CONT "TAPE"); | |
159 | break; | |
160 | case ide_optical: | |
161 | printk(KERN_CONT "OPTICAL"); | |
162 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; | |
163 | break; | |
164 | default: | |
165 | printk(KERN_CONT "UNKNOWN (type %d)", type); | |
166 | break; | |
167 | } | |
168 | ||
169 | printk(KERN_CONT " drive\n"); | |
170 | drive->media = type; | |
171 | /* an ATAPI device ignores DRDY */ | |
172 | drive->ready_stat = 0; | |
173 | if (ata_id_cdb_intr(id)) | |
174 | drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; | |
175 | drive->dev_flags |= IDE_DFLAG_DOORLOCKING; | |
176 | /* we don't do head unloading on ATAPI devices */ | |
177 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
178 | } | |
179 | ||
1da177e4 LT |
180 | /** |
181 | * do_identify - identify a drive | |
182 | * @drive: drive to identify | |
183 | * @cmd: command used | |
184 | * | |
185 | * Called when we have issued a drive identify command to | |
186 | * read and parse the results. This function is run with | |
187 | * interrupts disabled. | |
188 | */ | |
047140ae BZ |
189 | |
190 | static void do_identify(ide_drive_t *drive, u8 cmd) | |
1da177e4 LT |
191 | { |
192 | ide_hwif_t *hwif = HWIF(drive); | |
4dde4492 BZ |
193 | u16 *id = drive->id; |
194 | char *m = (char *)&id[ATA_ID_PROD]; | |
94b9efdf | 195 | unsigned long flags; |
24630dc6 | 196 | int bswap = 1; |
1da177e4 | 197 | |
94b9efdf BZ |
198 | /* local CPU only; some systems need this */ |
199 | local_irq_save(flags); | |
1da177e4 | 200 | /* read 512 bytes of id info */ |
374e042c | 201 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
94b9efdf | 202 | local_irq_restore(flags); |
1da177e4 | 203 | |
97100fc8 | 204 | drive->dev_flags |= IDE_DFLAG_ID_READ; |
7b9f25b5 BZ |
205 | #ifdef DEBUG |
206 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
207 | ide_dump_identify((u8 *)id); | |
208 | #endif | |
1da177e4 LT |
209 | ide_fix_driveid(id); |
210 | ||
1da177e4 | 211 | /* |
aaaade3f BZ |
212 | * ATA_CMD_ID_ATA returns little-endian info, |
213 | * ATA_CMD_ID_ATAPI *usually* returns little-endian info. | |
1da177e4 | 214 | */ |
aaaade3f | 215 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 BZ |
216 | if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
217 | (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ | |
218 | (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ | |
1da177e4 | 219 | /* Vertos drives may still be weird */ |
4dde4492 | 220 | bswap ^= 1; |
1da177e4 | 221 | } |
4dde4492 BZ |
222 | |
223 | ide_fixstring(m, ATA_ID_PROD_LEN, bswap); | |
224 | ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); | |
225 | ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); | |
1da177e4 | 226 | |
699b052a | 227 | /* we depend on this a lot! */ |
4dde4492 | 228 | m[ATA_ID_PROD_LEN - 1] = '\0'; |
699b052a | 229 | |
4dde4492 | 230 | if (strstr(m, "E X A B Y T E N E S T")) |
1da177e4 LT |
231 | goto err_misc; |
232 | ||
97100fc8 BZ |
233 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
234 | drive->dev_flags &= ~IDE_DFLAG_DEAD; | |
1da177e4 LT |
235 | |
236 | /* | |
237 | * Check for an ATAPI device | |
238 | */ | |
24630dc6 BZ |
239 | if (cmd == ATA_CMD_ID_ATAPI) |
240 | ide_classify_atapi_dev(drive); | |
241 | else | |
1da177e4 LT |
242 | /* |
243 | * Not an ATAPI device: looks like a "regular" hard disk | |
244 | */ | |
24630dc6 | 245 | ide_classify_ata_dev(drive); |
1da177e4 | 246 | return; |
1da177e4 LT |
247 | err_misc: |
248 | kfree(id); | |
97100fc8 | 249 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
250 | } |
251 | ||
252 | /** | |
253 | * actual_try_to_identify - send ata/atapi identify | |
254 | * @drive: drive to identify | |
255 | * @cmd: command to use | |
256 | * | |
257 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
258 | * and waits for a response. It also monitors irqs while this is | |
259 | * happening, in hope of automatically determining which one is | |
260 | * being used by the interface. | |
261 | * | |
262 | * Returns: 0 device was identified | |
263 | * 1 device timed-out (no response to identify request) | |
264 | * 2 device aborted the command (refused to identify itself) | |
265 | */ | |
266 | ||
267 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
268 | { | |
269 | ide_hwif_t *hwif = HWIF(drive); | |
4c3032d8 | 270 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 271 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 272 | int use_altstatus = 0, rc; |
1da177e4 LT |
273 | unsigned long timeout; |
274 | u8 s = 0, a = 0; | |
275 | ||
276 | /* take a deep breath */ | |
277 | msleep(50); | |
278 | ||
6636487e BZ |
279 | if (io_ports->ctl_addr && |
280 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { | |
374e042c BZ |
281 | a = tp_ops->read_altstatus(hwif); |
282 | s = tp_ops->read_status(hwif); | |
3a7d2484 | 283 | if ((a ^ s) & ~ATA_IDX) |
1da177e4 | 284 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
285 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
286 | "instead of ALTSTATUS(0x%02x)\n", | |
287 | drive->name, s, a); | |
288 | else | |
1da177e4 | 289 | /* use non-intrusive polling */ |
c47137a9 BZ |
290 | use_altstatus = 1; |
291 | } | |
1da177e4 LT |
292 | |
293 | /* set features register for atapi | |
294 | * identify command to be sure of reply | |
295 | */ | |
aaaade3f | 296 | if (cmd == ATA_CMD_ID_ATAPI) { |
4e65837b BZ |
297 | ide_task_t task; |
298 | ||
299 | memset(&task, 0, sizeof(task)); | |
300 | /* disable DMA & overlap */ | |
301 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
302 | ||
374e042c | 303 | tp_ops->tf_load(drive, &task); |
4e65837b | 304 | } |
1da177e4 LT |
305 | |
306 | /* ask drive for ID */ | |
374e042c | 307 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 308 | |
aaaade3f | 309 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
b163f46d BZ |
310 | |
311 | if (ide_busy_sleep(hwif, timeout, use_altstatus)) | |
312 | return 1; | |
1da177e4 | 313 | |
3a7d2484 | 314 | /* wait for IRQ and ATA_DRQ */ |
1da177e4 | 315 | msleep(50); |
374e042c | 316 | s = tp_ops->read_status(hwif); |
c47137a9 | 317 | |
3a7d2484 | 318 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
319 | /* drive returned ID */ |
320 | do_identify(drive, cmd); | |
321 | /* drive responded with ID */ | |
322 | rc = 0; | |
323 | /* clear drive IRQ */ | |
374e042c | 324 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
325 | } else { |
326 | /* drive refused ID */ | |
327 | rc = 2; | |
328 | } | |
329 | return rc; | |
330 | } | |
331 | ||
332 | /** | |
333 | * try_to_identify - try to identify a drive | |
334 | * @drive: drive to probe | |
335 | * @cmd: command to use | |
336 | * | |
337 | * Issue the identify command and then do IRQ probing to | |
338 | * complete the identification when needed by finding the | |
339 | * IRQ the drive is attached to | |
340 | */ | |
341 | ||
342 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
343 | { | |
344 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 345 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 LT |
346 | int retval; |
347 | int autoprobe = 0; | |
348 | unsigned long cookie = 0; | |
349 | ||
350 | /* | |
351 | * Disable device irq unless we need to | |
352 | * probe for it. Otherwise we'll get spurious | |
353 | * interrupts during the identify-phase that | |
354 | * the irq handler isn't expecting. | |
355 | */ | |
4c3032d8 | 356 | if (hwif->io_ports.ctl_addr) { |
1da177e4 LT |
357 | if (!hwif->irq) { |
358 | autoprobe = 1; | |
359 | cookie = probe_irq_on(); | |
1da177e4 | 360 | } |
374e042c | 361 | tp_ops->set_irq(hwif, autoprobe); |
1da177e4 LT |
362 | } |
363 | ||
364 | retval = actual_try_to_identify(drive, cmd); | |
365 | ||
366 | if (autoprobe) { | |
367 | int irq; | |
81ca6919 | 368 | |
374e042c | 369 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 370 | /* clear drive IRQ */ |
374e042c | 371 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
372 | udelay(5); |
373 | irq = probe_irq_off(cookie); | |
374 | if (!hwif->irq) { | |
375 | if (irq > 0) { | |
376 | hwif->irq = irq; | |
377 | } else { | |
378 | /* Mmmm.. multiple IRQs.. | |
379 | * don't know which was ours | |
380 | */ | |
1b8ebad8 | 381 | printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
1da177e4 LT |
382 | drive->name, cookie); |
383 | } | |
384 | } | |
385 | } | |
386 | return retval; | |
387 | } | |
388 | ||
b163f46d | 389 | int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) |
3a5015cc | 390 | { |
3a5015cc BZ |
391 | u8 stat; |
392 | ||
b163f46d BZ |
393 | timeout += jiffies; |
394 | ||
3a5015cc | 395 | do { |
b163f46d BZ |
396 | msleep(50); /* give drive a breather */ |
397 | stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) | |
398 | : hwif->tp_ops->read_status(hwif); | |
3a7d2484 | 399 | if ((stat & ATA_BUSY) == 0) |
3a5015cc BZ |
400 | return 0; |
401 | } while (time_before(jiffies, timeout)); | |
402 | ||
b163f46d | 403 | return 1; /* drive timed-out */ |
3a5015cc | 404 | } |
1da177e4 | 405 | |
1f2efb82 BZ |
406 | static u8 ide_read_device(ide_drive_t *drive) |
407 | { | |
408 | ide_task_t task; | |
409 | ||
410 | memset(&task, 0, sizeof(task)); | |
411 | task.tf_flags = IDE_TFLAG_IN_DEVICE; | |
412 | ||
374e042c | 413 | drive->hwif->tp_ops->tf_read(drive, &task); |
1f2efb82 BZ |
414 | |
415 | return task.tf.device; | |
416 | } | |
417 | ||
1da177e4 LT |
418 | /** |
419 | * do_probe - probe an IDE device | |
420 | * @drive: drive to probe | |
421 | * @cmd: command to use | |
422 | * | |
423 | * do_probe() has the difficult job of finding a drive if it exists, | |
424 | * without getting hung up if it doesn't exist, without trampling on | |
425 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
426 | * | |
427 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
428 | * but does not respond right away, the probe will "hang in there" | |
429 | * for the maximum wait time (about 30 seconds), otherwise it will | |
430 | * exit much more quickly. | |
431 | * | |
432 | * Returns: 0 device was identified | |
433 | * 1 device timed-out (no response to identify request) | |
434 | * 2 device aborted the command (refused to identify itself) | |
435 | * 3 bad status from device (possible for ATAPI drives) | |
436 | * 4 probe was not attempted because failure was obvious | |
437 | */ | |
438 | ||
439 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
440 | { | |
1da177e4 | 441 | ide_hwif_t *hwif = HWIF(drive); |
374e042c | 442 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 443 | int rc; |
97100fc8 BZ |
444 | u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
445 | ||
446 | /* avoid waiting for inappropriate probes */ | |
447 | if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) | |
448 | return 4; | |
1da177e4 | 449 | |
1da177e4 | 450 | #ifdef DEBUG |
1b8ebad8 | 451 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
97100fc8 | 452 | drive->name, present, drive->media, |
aaaade3f | 453 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
454 | #endif |
455 | ||
456 | /* needed for some systems | |
457 | * (e.g. crw9624 as drive0 with disk as slave) | |
458 | */ | |
459 | msleep(50); | |
460 | SELECT_DRIVE(drive); | |
461 | msleep(50); | |
1f2efb82 | 462 | |
7f612f27 | 463 | if (ide_read_device(drive) != drive->select && present == 0) { |
123995b9 | 464 | if (drive->dn & 1) { |
1da177e4 LT |
465 | /* exit with drive0 selected */ |
466 | SELECT_DRIVE(&hwif->drives[0]); | |
3a7d2484 | 467 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
468 | msleep(50); |
469 | } | |
470 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
471 | return 3; | |
472 | } | |
473 | ||
374e042c | 474 | stat = tp_ops->read_status(hwif); |
c47137a9 | 475 | |
3a7d2484 | 476 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
97100fc8 | 477 | present || cmd == ATA_CMD_ID_ATAPI) { |
1da177e4 LT |
478 | /* send cmd and wait */ |
479 | if ((rc = try_to_identify(drive, cmd))) { | |
480 | /* failed: try again */ | |
481 | rc = try_to_identify(drive,cmd); | |
482 | } | |
57b55275 | 483 | |
374e042c | 484 | stat = tp_ops->read_status(hwif); |
57b55275 | 485 | |
3a7d2484 | 486 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
487 | return 4; |
488 | ||
aaaade3f | 489 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
490 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
491 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 492 | msleep(50); |
e81a3bde | 493 | SELECT_DRIVE(drive); |
1da177e4 | 494 | msleep(50); |
aaaade3f | 495 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
b163f46d | 496 | (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); |
1da177e4 LT |
497 | rc = try_to_identify(drive, cmd); |
498 | } | |
57b55275 BZ |
499 | |
500 | /* ensure drive IRQ is clear */ | |
374e042c | 501 | stat = tp_ops->read_status(hwif); |
57b55275 | 502 | |
1da177e4 | 503 | if (rc == 1) |
57b55275 BZ |
504 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
505 | drive->name, stat); | |
1da177e4 LT |
506 | } else { |
507 | /* not present or maybe ATAPI */ | |
508 | rc = 3; | |
509 | } | |
123995b9 | 510 | if (drive->dn & 1) { |
1da177e4 LT |
511 | /* exit with drive0 selected */ |
512 | SELECT_DRIVE(&hwif->drives[0]); | |
513 | msleep(50); | |
514 | /* ensure drive irq is clear */ | |
374e042c | 515 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
516 | } |
517 | return rc; | |
518 | } | |
519 | ||
520 | /* | |
521 | * | |
522 | */ | |
523 | static void enable_nest (ide_drive_t *drive) | |
524 | { | |
525 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 526 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 527 | u8 stat; |
1da177e4 | 528 | |
4dde4492 BZ |
529 | printk(KERN_INFO "%s: enabling %s -- ", |
530 | hwif->name, (char *)&drive->id[ATA_ID_PROD]); | |
1b8ebad8 | 531 | |
1da177e4 LT |
532 | SELECT_DRIVE(drive); |
533 | msleep(50); | |
aaaade3f | 534 | tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); |
3a5015cc | 535 | |
b163f46d | 536 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { |
3a5015cc BZ |
537 | printk(KERN_CONT "failed (timeout)\n"); |
538 | return; | |
539 | } | |
1da177e4 LT |
540 | |
541 | msleep(50); | |
542 | ||
374e042c | 543 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
544 | |
545 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
546 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
547 | else | |
548 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
549 | } |
550 | ||
551 | /** | |
552 | * probe_for_drives - upper level drive probe | |
553 | * @drive: drive to probe for | |
554 | * | |
555 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
556 | * and presents things to the user as needed. | |
557 | * | |
558 | * Returns: 0 no device was found | |
97100fc8 BZ |
559 | * 1 device was found |
560 | * (note: IDE_DFLAG_PRESENT might still be not set) | |
1da177e4 | 561 | */ |
047140ae BZ |
562 | |
563 | static u8 probe_for_drive(ide_drive_t *drive) | |
1da177e4 | 564 | { |
4dde4492 BZ |
565 | char *m; |
566 | ||
1da177e4 LT |
567 | /* |
568 | * In order to keep things simple we have an id | |
569 | * block for all drives at all times. If the device | |
570 | * is pre ATA or refuses ATA/ATAPI identify we | |
571 | * will add faked data to this. | |
572 | * | |
573 | * Also note that 0 everywhere means "can't do X" | |
574 | */ | |
575 | ||
97100fc8 BZ |
576 | drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
577 | ||
151a6701 | 578 | drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); |
97100fc8 | 579 | if (drive->id == NULL) { |
1da177e4 LT |
580 | printk(KERN_ERR "ide: out of memory for id data.\n"); |
581 | return 0; | |
582 | } | |
4dde4492 BZ |
583 | |
584 | m = (char *)&drive->id[ATA_ID_PROD]; | |
585 | strcpy(m, "UNKNOWN"); | |
586 | ||
1da177e4 | 587 | /* skip probing? */ |
97100fc8 | 588 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
c36a7e98 | 589 | retry: |
1da177e4 | 590 | /* if !(success||timed-out) */ |
aaaade3f | 591 | if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) |
1da177e4 | 592 | /* look for ATAPI device */ |
aaaade3f | 593 | (void)do_probe(drive, ATA_CMD_ID_ATAPI); |
c36a7e98 | 594 | |
97100fc8 | 595 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
596 | /* drive not found */ |
597 | return 0; | |
4dde4492 | 598 | |
c36a7e98 | 599 | if (strstr(m, "E X A B Y T E N E S T")) { |
78595575 | 600 | enable_nest(drive); |
c36a7e98 BZ |
601 | goto retry; |
602 | } | |
603 | ||
1da177e4 | 604 | /* identification failed? */ |
97100fc8 | 605 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
606 | if (drive->media == ide_disk) { |
607 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
608 | drive->name, drive->cyl, | |
609 | drive->head, drive->sect); | |
610 | } else if (drive->media == ide_cdrom) { | |
611 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
612 | } else { | |
613 | /* nuke it */ | |
614 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
97100fc8 | 615 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
616 | } |
617 | } | |
618 | /* drive was found */ | |
619 | } | |
97100fc8 BZ |
620 | |
621 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 | 622 | return 0; |
97100fc8 | 623 | |
1da177e4 | 624 | /* The drive wasn't being helpful. Add generic info only */ |
97100fc8 | 625 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
626 | generic_id(drive); |
627 | return 1; | |
628 | } | |
629 | ||
630 | if (drive->media == ide_disk) { | |
631 | ide_disk_init_chs(drive); | |
632 | ide_disk_init_mult_count(drive); | |
633 | } | |
634 | ||
97100fc8 | 635 | return !!(drive->dev_flags & IDE_DFLAG_PRESENT); |
1da177e4 LT |
636 | } |
637 | ||
fc410698 | 638 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
639 | { |
640 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
641 | ||
f36d4024 | 642 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
643 | } |
644 | ||
f74c9141 | 645 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 646 | { |
349ae23f RD |
647 | int ret; |
648 | ||
1da177e4 | 649 | /* register with global device tree */ |
dc09c784 | 650 | dev_set_name(&hwif->gendev, hwif->name); |
1da177e4 | 651 | hwif->gendev.driver_data = hwif; |
96d40941 | 652 | hwif->gendev.parent = hwif->dev; |
1da177e4 | 653 | hwif->gendev.release = hwif_release_dev; |
96d40941 | 654 | |
349ae23f | 655 | ret = device_register(&hwif->gendev); |
f74c9141 | 656 | if (ret < 0) { |
349ae23f | 657 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 658 | __func__, ret); |
f74c9141 BZ |
659 | goto out; |
660 | } | |
661 | ||
3ee074bf GKH |
662 | hwif->portdev = device_create(ide_port_class, &hwif->gendev, |
663 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
664 | if (IS_ERR(hwif->portdev)) { |
665 | ret = PTR_ERR(hwif->portdev); | |
666 | device_unregister(&hwif->gendev); | |
667 | } | |
f74c9141 BZ |
668 | out: |
669 | return ret; | |
1da177e4 LT |
670 | } |
671 | ||
c860a8f2 BZ |
672 | /** |
673 | * ide_port_wait_ready - wait for port to become ready | |
674 | * @hwif: IDE port | |
675 | * | |
676 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
677 | * platforms. Typical cases are: | |
678 | * | |
679 | * - The firmware hard reset the disk before booting the kernel, | |
680 | * the drive is still doing it's poweron-reset sequence, that | |
681 | * can take up to 30 seconds. | |
682 | * | |
683 | * - The firmware does nothing (or no firmware), the device is | |
684 | * still in POST state (same as above actually). | |
685 | * | |
686 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
687 | * their reset sequence even when they are non-selected slave | |
688 | * devices, thus preventing discovery of the main HD. | |
689 | * | |
690 | * Doing this wait-for-non-busy should not harm any existing | |
691 | * configuration and fix some issues like the above. | |
692 | * | |
693 | * BenH. | |
694 | * | |
695 | * Returns 0 on success, error code (< 0) otherwise. | |
696 | */ | |
697 | ||
698 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 699 | { |
8266105b | 700 | int unit, rc; |
1da177e4 LT |
701 | |
702 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
703 | ||
704 | /* Let HW settle down a bit from whatever init state we | |
705 | * come from */ | |
706 | mdelay(2); | |
707 | ||
708 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
709 | * I know of at least one disk who takes 31 seconds, I use 35 | |
710 | * here to be safe | |
711 | */ | |
712 | rc = ide_wait_not_busy(hwif, 35000); | |
713 | if (rc) | |
714 | return rc; | |
715 | ||
716 | /* Now make sure both master & slave are ready */ | |
8266105b JS |
717 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
718 | ide_drive_t *drive = &hwif->drives[unit]; | |
719 | ||
720 | /* Ignore disks that we will not probe for later. */ | |
97100fc8 BZ |
721 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
722 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
8266105b | 723 | SELECT_DRIVE(drive); |
374e042c | 724 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
725 | mdelay(2); |
726 | rc = ide_wait_not_busy(hwif, 35000); | |
727 | if (rc) | |
728 | goto out; | |
729 | } else | |
730 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
731 | drive->name); | |
732 | } | |
733 | out: | |
1da177e4 | 734 | /* Exit function with master reselected (let's be sane) */ |
8266105b JS |
735 | if (unit) |
736 | SELECT_DRIVE(&hwif->drives[0]); | |
737 | ||
1da177e4 LT |
738 | return rc; |
739 | } | |
740 | ||
741 | /** | |
742 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 743 | * @dev1: slave device |
1da177e4 LT |
744 | * |
745 | * Analyse the drives on the interface and attempt to decide if we | |
746 | * have the same drive viewed twice. This occurs with crap CF adapters | |
747 | * and PCMCIA sometimes. | |
748 | */ | |
749 | ||
4dde4492 | 750 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 751 | { |
4dde4492 | 752 | ide_drive_t *dev0 = &dev1->hwif->drives[0]; |
1da177e4 | 753 | |
97100fc8 | 754 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
755 | return; |
756 | ||
757 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
758 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
759 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
760 | return; |
761 | ||
762 | /* Serial numbers do not match */ | |
4dde4492 BZ |
763 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
764 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
765 | return; |
766 | ||
767 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 768 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
769 | return; |
770 | ||
771 | /* Appears to be an IDE flash adapter with decode bugs */ | |
772 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
773 | ||
97100fc8 | 774 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
775 | } |
776 | ||
777 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
778 | ||
9d501529 | 779 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 780 | { |
1da177e4 LT |
781 | unsigned long flags; |
782 | unsigned int irqd; | |
a14dc574 BZ |
783 | int unit, rc = -ENODEV; |
784 | ||
785 | BUG_ON(hwif->present); | |
1da177e4 | 786 | |
97100fc8 BZ |
787 | if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && |
788 | (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 789 | return -EACCES; |
1da177e4 | 790 | |
1da177e4 LT |
791 | /* |
792 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
793 | * we'll install our IRQ driver much later... | |
794 | */ | |
795 | irqd = hwif->irq; | |
796 | if (irqd) | |
797 | disable_irq(hwif->irq); | |
798 | ||
799 | local_irq_set(flags); | |
800 | ||
c860a8f2 | 801 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
802 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
803 | ||
804 | /* | |
f367bed0 BZ |
805 | * Second drive should only exist if first drive was found, |
806 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 807 | */ |
f367bed0 | 808 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 | 809 | ide_drive_t *drive = &hwif->drives[unit]; |
123995b9 | 810 | |
1da177e4 | 811 | (void) probe_for_drive(drive); |
97100fc8 | 812 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 813 | rc = 0; |
1da177e4 | 814 | } |
e460a597 | 815 | |
1da177e4 | 816 | local_irq_restore(flags); |
e460a597 | 817 | |
1da177e4 LT |
818 | /* |
819 | * Use cached IRQ number. It might be (and is...) changed by probe | |
820 | * code above | |
821 | */ | |
822 | if (irqd) | |
823 | enable_irq(irqd); | |
824 | ||
a14dc574 | 825 | return rc; |
e84e7ea7 BZ |
826 | } |
827 | ||
828 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
829 | { | |
ac95beed | 830 | const struct ide_port_ops *port_ops = hwif->port_ops; |
e84e7ea7 BZ |
831 | int unit; |
832 | ||
f01393e4 BZ |
833 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
834 | ide_drive_t *drive = &hwif->drives[unit]; | |
835 | ||
97100fc8 BZ |
836 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
837 | if (port_ops && port_ops->quirkproc) | |
838 | port_ops->quirkproc(drive); | |
839 | } | |
f01393e4 | 840 | } |
0380dad4 | 841 | |
1da177e4 LT |
842 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
843 | ide_drive_t *drive = &hwif->drives[unit]; | |
844 | ||
97100fc8 | 845 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
207daeaa | 846 | ide_set_max_pio(drive); |
1da177e4 | 847 | |
97100fc8 | 848 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 849 | |
5e37bdc0 | 850 | if (hwif->dma_ops) |
8c0697cc | 851 | ide_set_dma(drive); |
1da177e4 LT |
852 | } |
853 | } | |
208a08f7 KG |
854 | |
855 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
856 | ide_drive_t *drive = &hwif->drives[unit]; | |
857 | ||
97100fc8 BZ |
858 | if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || |
859 | drive->id[ATA_ID_DWORD_IO]) | |
860 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
208a08f7 | 861 | else |
97100fc8 | 862 | drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; |
208a08f7 | 863 | } |
1da177e4 LT |
864 | } |
865 | ||
1da177e4 LT |
866 | /* |
867 | * init request queue | |
868 | */ | |
869 | static int ide_init_queue(ide_drive_t *drive) | |
870 | { | |
165125e1 | 871 | struct request_queue *q; |
1da177e4 LT |
872 | ide_hwif_t *hwif = HWIF(drive); |
873 | int max_sectors = 256; | |
874 | int max_sg_entries = PRD_ENTRIES; | |
875 | ||
876 | /* | |
877 | * Our default set up assumes the normal IDE case, | |
878 | * that is 64K segmenting, standard PRD setup | |
879 | * and LBA28. Some drivers then impose their own | |
880 | * limits and LBA48 we could raise it but as yet | |
881 | * do not. | |
882 | */ | |
1946089a | 883 | |
201bffa4 | 884 | q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); |
1da177e4 LT |
885 | if (!q) |
886 | return 1; | |
887 | ||
888 | q->queuedata = drive; | |
889 | blk_queue_segment_boundary(q, 0xffff); | |
890 | ||
1da177e4 LT |
891 | if (hwif->rqsize < max_sectors) |
892 | max_sectors = hwif->rqsize; | |
893 | blk_queue_max_sectors(q, max_sectors); | |
894 | ||
895 | #ifdef CONFIG_PCI | |
896 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
897 | * creates segments that don't completely match our boundary | |
898 | * requirements and thus need to be broken up again. Because it | |
899 | * doesn't align properly either, we may actually have to break up | |
900 | * to more segments than what was we got in the first place, a max | |
901 | * worst case is twice as many. | |
902 | * This will be fixed once we teach pci_map_sg() about our boundary | |
903 | * requirements, hopefully soon. *FIXME* | |
904 | */ | |
905 | if (!PCI_DMA_BUS_IS_PHYS) | |
906 | max_sg_entries >>= 1; | |
907 | #endif /* CONFIG_PCI */ | |
908 | ||
909 | blk_queue_max_hw_segments(q, max_sg_entries); | |
910 | blk_queue_max_phys_segments(q, max_sg_entries); | |
911 | ||
912 | /* assign drive queue */ | |
913 | drive->queue = q; | |
914 | ||
915 | /* needs drive->queue to be set */ | |
916 | ide_toggle_bounce(drive, 1); | |
917 | ||
1da177e4 LT |
918 | return 0; |
919 | } | |
920 | ||
0947e0dc BZ |
921 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
922 | { | |
923 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
924 | ||
2a2ca6a9 | 925 | spin_lock_irq(&hwgroup->lock); |
0947e0dc BZ |
926 | if (!hwgroup->drive) { |
927 | /* first drive for hwgroup. */ | |
928 | drive->next = drive; | |
929 | hwgroup->drive = drive; | |
930 | hwgroup->hwif = HWIF(hwgroup->drive); | |
931 | } else { | |
932 | drive->next = hwgroup->drive->next; | |
933 | hwgroup->drive->next = drive; | |
934 | } | |
2a2ca6a9 | 935 | spin_unlock_irq(&hwgroup->lock); |
0947e0dc BZ |
936 | } |
937 | ||
d5bc6592 BZ |
938 | /* |
939 | * For any present drive: | |
940 | * - allocate the block device queue | |
941 | * - link drive into the hwgroup | |
942 | */ | |
e415e495 | 943 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 944 | { |
e415e495 | 945 | int i, j = 0; |
d5bc6592 | 946 | |
26042d05 | 947 | mutex_lock(&ide_cfg_mtx); |
d5bc6592 BZ |
948 | for (i = 0; i < MAX_DRIVES; i++) { |
949 | ide_drive_t *drive = &hwif->drives[i]; | |
950 | ||
97100fc8 | 951 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
d5bc6592 BZ |
952 | continue; |
953 | ||
954 | if (ide_init_queue(drive)) { | |
955 | printk(KERN_ERR "ide: failed to init %s\n", | |
956 | drive->name); | |
e415e495 EO |
957 | kfree(drive->id); |
958 | drive->id = NULL; | |
959 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; | |
d5bc6592 BZ |
960 | continue; |
961 | } | |
962 | ||
e415e495 EO |
963 | j++; |
964 | ||
d5bc6592 BZ |
965 | ide_add_drive_to_hwgroup(drive); |
966 | } | |
26042d05 | 967 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
968 | |
969 | return j; | |
d5bc6592 BZ |
970 | } |
971 | ||
af1cbba3 BZ |
972 | static ide_hwif_t *ide_ports[MAX_HWIFS]; |
973 | ||
6059143a BZ |
974 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
975 | { | |
976 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
977 | ||
af1cbba3 BZ |
978 | ide_ports[hwif->index] = NULL; |
979 | ||
2a2ca6a9 | 980 | spin_lock_irq(&hwgroup->lock); |
6059143a BZ |
981 | /* |
982 | * Remove us from the hwgroup, and free | |
983 | * the hwgroup if we were the only member | |
984 | */ | |
985 | if (hwif->next == hwif) { | |
986 | BUG_ON(hwgroup->hwif != hwif); | |
987 | kfree(hwgroup); | |
988 | } else { | |
989 | /* There is another interface in hwgroup. | |
990 | * Unlink us, and set hwgroup->drive and ->hwif to | |
991 | * something sane. | |
992 | */ | |
993 | ide_hwif_t *g = hwgroup->hwif; | |
994 | ||
995 | while (g->next != hwif) | |
996 | g = g->next; | |
997 | g->next = hwif->next; | |
998 | if (hwgroup->hwif == hwif) { | |
999 | /* Chose a random hwif for hwgroup->hwif. | |
1000 | * It's guaranteed that there are no drives | |
1001 | * left in the hwgroup. | |
1002 | */ | |
1003 | BUG_ON(hwgroup->drive != NULL); | |
1004 | hwgroup->hwif = g; | |
1005 | } | |
1006 | BUG_ON(hwgroup->hwif == hwif); | |
1007 | } | |
2a2ca6a9 | 1008 | spin_unlock_irq(&hwgroup->lock); |
6059143a BZ |
1009 | } |
1010 | ||
1da177e4 LT |
1011 | /* |
1012 | * This routine sets up the irq for an ide interface, and creates a new | |
1013 | * hwgroup for the irq/hwif if none was previously assigned. | |
1014 | * | |
1015 | * Much of the code is for correctly detecting/handling irq sharing | |
1016 | * and irq serialization situations. This is somewhat complex because | |
1017 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
1018 | */ |
1019 | static int init_irq (ide_hwif_t *hwif) | |
1020 | { | |
4c3032d8 | 1021 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1da177e4 LT |
1022 | unsigned int index; |
1023 | ide_hwgroup_t *hwgroup; | |
1024 | ide_hwif_t *match = NULL; | |
ae86afae | 1025 | int sa = 0; |
1da177e4 | 1026 | |
ef29888e | 1027 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 1028 | hwif->hwgroup = NULL; |
75d21fff | 1029 | |
1da177e4 | 1030 | for (index = 0; index < MAX_HWIFS; index++) { |
af1cbba3 BZ |
1031 | ide_hwif_t *h = ide_ports[index]; |
1032 | ||
1033 | if (h && h->hwgroup) { /* scan only initialized ports */ | |
702c026b BZ |
1034 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) { |
1035 | if (hwif->host == h->host) | |
1036 | match = h; | |
1da177e4 LT |
1037 | } |
1038 | } | |
1039 | } | |
75d21fff | 1040 | |
1da177e4 LT |
1041 | /* |
1042 | * If we are still without a hwgroup, then form a new one | |
1043 | */ | |
1044 | if (match) { | |
1045 | hwgroup = match->hwgroup; | |
1046 | hwif->hwgroup = hwgroup; | |
1047 | /* | |
1048 | * Link us into the hwgroup. | |
1049 | * This must be done early, do ensure that unexpected_intr | |
1050 | * can find the hwif and prevent irq storms. | |
1051 | * No drives are attached to the new hwif, choose_drive | |
1052 | * can't do anything stupid (yet). | |
1053 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1054 | * linked list, the first entry is the hwif that owns | |
1055 | * hwgroup->handler - do not change that. | |
1056 | */ | |
2a2ca6a9 | 1057 | spin_lock_irq(&hwgroup->lock); |
1da177e4 LT |
1058 | hwif->next = hwgroup->hwif->next; |
1059 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1060 | BUG_ON(hwif->next == hwif); |
2a2ca6a9 | 1061 | spin_unlock_irq(&hwgroup->lock); |
1da177e4 | 1062 | } else { |
422278ef BZ |
1063 | hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, |
1064 | hwif_to_node(hwif)); | |
1065 | if (hwgroup == NULL) | |
1066 | goto out_up; | |
1da177e4 | 1067 | |
2a2ca6a9 BZ |
1068 | spin_lock_init(&hwgroup->lock); |
1069 | ||
1da177e4 | 1070 | hwif->hwgroup = hwgroup; |
422278ef | 1071 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1072 | |
1da177e4 LT |
1073 | init_timer(&hwgroup->timer); |
1074 | hwgroup->timer.function = &ide_timer_expiry; | |
1075 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1076 | } | |
1077 | ||
af1cbba3 BZ |
1078 | ide_ports[hwif->index] = hwif; |
1079 | ||
7b892806 | 1080 | #if defined(__mc68000__) |
ae86afae | 1081 | sa = IRQF_SHARED; |
e1771e20 | 1082 | #endif /* __mc68000__ */ |
1da177e4 | 1083 | |
ae86afae BZ |
1084 | if (hwif->chipset == ide_pci) |
1085 | sa = IRQF_SHARED; | |
1da177e4 | 1086 | |
ae86afae BZ |
1087 | if (io_ports->ctl_addr) |
1088 | hwif->tp_ops->set_irq(hwif, 1); | |
1da177e4 | 1089 | |
ae86afae BZ |
1090 | if (request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwif)) |
1091 | goto out_unlink; | |
1da177e4 | 1092 | |
8a0e7e14 BZ |
1093 | if (!hwif->rqsize) { |
1094 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1095 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1096 | hwif->rqsize = 256; | |
1097 | else | |
1098 | hwif->rqsize = 65536; | |
1099 | } | |
1100 | ||
7b892806 | 1101 | #if !defined(__mc68000__) |
1b8ebad8 | 1102 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
1103 | io_ports->data_addr, io_ports->status_addr, |
1104 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 1105 | #else |
1b8ebad8 | 1106 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 1107 | io_ports->data_addr, hwif->irq); |
7b892806 | 1108 | #endif /* __mc68000__ */ |
1da177e4 | 1109 | if (match) |
f58c1ab8 | 1110 | printk(KERN_CONT " (serialized with %s)", match->name); |
1b8ebad8 | 1111 | printk(KERN_CONT "\n"); |
d5bc6592 | 1112 | |
ef29888e | 1113 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1114 | return 0; |
1115 | out_unlink: | |
fbd13088 | 1116 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1117 | out_up: |
ef29888e | 1118 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1119 | return 1; |
1120 | } | |
1121 | ||
1122 | static int ata_lock(dev_t dev, void *data) | |
1123 | { | |
1124 | /* FIXME: we want to pin hwif down */ | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1129 | { | |
1130 | ide_hwif_t *hwif = data; | |
1131 | int unit = *part >> PARTN_BITS; | |
1132 | ide_drive_t *drive = &hwif->drives[unit]; | |
97100fc8 BZ |
1133 | |
1134 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
1135 | return NULL; |
1136 | ||
1137 | if (drive->media == ide_disk) | |
1138 | request_module("ide-disk"); | |
1da177e4 LT |
1139 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
1140 | request_module("ide-cd"); | |
1141 | if (drive->media == ide_tape) | |
1142 | request_module("ide-tape"); | |
1143 | if (drive->media == ide_floppy) | |
1144 | request_module("ide-floppy"); | |
1145 | ||
1146 | return NULL; | |
1147 | } | |
1148 | ||
1149 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1150 | { | |
1151 | struct gendisk *p = data; | |
1152 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 1153 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
1154 | } |
1155 | ||
1156 | static int exact_lock(dev_t dev, void *data) | |
1157 | { | |
1158 | struct gendisk *p = data; | |
1159 | ||
1160 | if (!get_disk(p)) | |
1161 | return -1; | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | void ide_register_region(struct gendisk *disk) | |
1166 | { | |
1167 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1168 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1169 | } | |
1170 | ||
1171 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1172 | ||
1173 | void ide_unregister_region(struct gendisk *disk) | |
1174 | { | |
1175 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1176 | disk->minors); | |
1177 | } | |
1178 | ||
1179 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1180 | ||
1181 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1182 | { | |
1183 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 1184 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
1185 | |
1186 | disk->major = hwif->major; | |
1187 | disk->first_minor = unit << PARTN_BITS; | |
1188 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1189 | disk->queue = drive->queue; | |
1190 | } | |
1191 | ||
1192 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1193 | ||
8604affd BZ |
1194 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1195 | { | |
1196 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1197 | ||
1198 | if (drive == drive->next) { | |
1199 | /* special case: last drive from hwgroup. */ | |
1200 | BUG_ON(hwgroup->drive != drive); | |
1201 | hwgroup->drive = NULL; | |
1202 | } else { | |
1203 | ide_drive_t *walk; | |
1204 | ||
1205 | walk = hwgroup->drive; | |
1206 | while (walk->next != drive) | |
1207 | walk = walk->next; | |
1208 | walk->next = drive->next; | |
1209 | if (hwgroup->drive == drive) { | |
1210 | hwgroup->drive = drive->next; | |
1211 | hwgroup->hwif = hwgroup->drive->hwif; | |
1212 | } | |
1213 | } | |
1214 | BUG_ON(hwgroup->drive == drive); | |
1215 | } | |
1216 | ||
1da177e4 LT |
1217 | static void drive_release_dev (struct device *dev) |
1218 | { | |
1219 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
2a2ca6a9 | 1220 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; |
1da177e4 | 1221 | |
5b0c4b30 BZ |
1222 | ide_proc_unregister_device(drive); |
1223 | ||
2a2ca6a9 | 1224 | spin_lock_irq(&hwgroup->lock); |
8604affd | 1225 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1226 | kfree(drive->id); |
1227 | drive->id = NULL; | |
97100fc8 | 1228 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 1229 | /* Messed up locking ... */ |
2a2ca6a9 | 1230 | spin_unlock_irq(&hwgroup->lock); |
8604affd | 1231 | blk_cleanup_queue(drive->queue); |
2a2ca6a9 | 1232 | spin_lock_irq(&hwgroup->lock); |
8604affd | 1233 | drive->queue = NULL; |
2a2ca6a9 | 1234 | spin_unlock_irq(&hwgroup->lock); |
8604affd | 1235 | |
f36d4024 | 1236 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1237 | } |
1238 | ||
1da177e4 LT |
1239 | static int hwif_init(ide_hwif_t *hwif) |
1240 | { | |
1241 | int old_irq; | |
1242 | ||
1da177e4 | 1243 | if (!hwif->irq) { |
a861beb1 | 1244 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1245 | if (!hwif->irq) { |
1b8ebad8 | 1246 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
48535651 | 1247 | return 0; |
1da177e4 LT |
1248 | } |
1249 | } | |
1da177e4 | 1250 | |
1da177e4 LT |
1251 | if (register_blkdev(hwif->major, hwif->name)) |
1252 | return 0; | |
1253 | ||
1254 | if (!hwif->sg_max_nents) | |
1255 | hwif->sg_max_nents = PRD_ENTRIES; | |
1256 | ||
45711f1a | 1257 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1258 | GFP_KERNEL); |
1259 | if (!hwif->sg_table) { | |
1260 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1261 | goto out; | |
1262 | } | |
45711f1a JA |
1263 | |
1264 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1265 | |
1266 | if (init_irq(hwif) == 0) | |
1267 | goto done; | |
1268 | ||
1269 | old_irq = hwif->irq; | |
1270 | /* | |
1271 | * It failed to initialise. Find the default IRQ for | |
1272 | * this port and try that. | |
1273 | */ | |
a861beb1 | 1274 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1275 | if (!hwif->irq) { |
1b8ebad8 | 1276 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1da177e4 LT |
1277 | hwif->name, old_irq); |
1278 | goto out; | |
1279 | } | |
1280 | if (init_irq(hwif)) { | |
1b8ebad8 | 1281 | printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
1da177e4 LT |
1282 | hwif->name, old_irq, hwif->irq); |
1283 | goto out; | |
1284 | } | |
1b8ebad8 | 1285 | printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
1da177e4 LT |
1286 | hwif->name, hwif->irq); |
1287 | ||
1288 | done: | |
3a4e7c96 BZ |
1289 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1290 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1291 | return 1; |
1292 | ||
1293 | out: | |
1294 | unregister_blkdev(hwif->major, hwif->name); | |
1295 | return 0; | |
1296 | } | |
1297 | ||
9601a607 BZ |
1298 | static void hwif_register_devices(ide_hwif_t *hwif) |
1299 | { | |
1300 | unsigned int i; | |
1301 | ||
1302 | for (i = 0; i < MAX_DRIVES; i++) { | |
1303 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1304 | struct device *dev = &drive->gendev; |
1305 | int ret; | |
9601a607 | 1306 | |
97100fc8 | 1307 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
c5d70cc7 | 1308 | continue; |
9601a607 | 1309 | |
dc09c784 | 1310 | dev_set_name(dev, "%u.%u", hwif->index, i); |
c5d70cc7 BZ |
1311 | dev->parent = &hwif->gendev; |
1312 | dev->bus = &ide_bus_type; | |
1313 | dev->driver_data = drive; | |
1314 | dev->release = drive_release_dev; | |
1315 | ||
1316 | ret = device_register(dev); | |
1317 | if (ret < 0) | |
1318 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1319 | "%d\n", __func__, ret); | |
9601a607 BZ |
1320 | } |
1321 | } | |
1322 | ||
7704ca2a BZ |
1323 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1324 | { | |
ac95beed | 1325 | const struct ide_port_ops *port_ops = hwif->port_ops; |
7704ca2a BZ |
1326 | int i; |
1327 | ||
1328 | for (i = 0; i < MAX_DRIVES; i++) { | |
1329 | ide_drive_t *drive = &hwif->drives[i]; | |
1330 | ||
123995b9 BZ |
1331 | drive->dn = i + hwif->channel * 2; |
1332 | ||
7704ca2a BZ |
1333 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1334 | drive->io_32bit = 1; | |
1335 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
97100fc8 | 1336 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1337 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1338 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1339 | |
e6d95bd1 BZ |
1340 | if (port_ops && port_ops->init_dev) |
1341 | port_ops->init_dev(drive); | |
1342 | } | |
7704ca2a BZ |
1343 | } |
1344 | ||
c413b9b9 BZ |
1345 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1346 | const struct ide_port_info *d) | |
8447d9d5 | 1347 | { |
b7691646 | 1348 | hwif->channel = port; |
c413b9b9 BZ |
1349 | |
1350 | if (d->chipset) | |
1351 | hwif->chipset = d->chipset; | |
1352 | ||
1353 | if (d->init_iops) | |
1354 | d->init_iops(hwif); | |
1355 | ||
c413b9b9 BZ |
1356 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
1357 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1358 | hwif->irq = port ? 15 : 14; | |
1359 | ||
23f8e4bf BZ |
1360 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1361 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1362 | hwif->pio_mask = d->pio_mask; |
1363 | ||
374e042c BZ |
1364 | if (d->tp_ops) |
1365 | hwif->tp_ops = d->tp_ops; | |
1366 | ||
ac95beed BZ |
1367 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1368 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1369 | hwif->port_ops = d->port_ops; | |
1370 | ||
c413b9b9 BZ |
1371 | hwif->swdma_mask = d->swdma_mask; |
1372 | hwif->mwdma_mask = d->mwdma_mask; | |
1373 | hwif->ultra_mask = d->udma_mask; | |
1374 | ||
b123f56e BZ |
1375 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1376 | int rc; | |
1377 | ||
1378 | if (d->init_dma) | |
1379 | rc = d->init_dma(hwif, d); | |
1380 | else | |
1381 | rc = ide_hwif_setup_dma(hwif, d); | |
1382 | ||
1383 | if (rc < 0) { | |
1384 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
ebb00fb5 | 1385 | hwif->dma_base = 0; |
b123f56e BZ |
1386 | hwif->swdma_mask = 0; |
1387 | hwif->mwdma_mask = 0; | |
1388 | hwif->ultra_mask = 0; | |
5e37bdc0 BZ |
1389 | } else if (d->dma_ops) |
1390 | hwif->dma_ops = d->dma_ops; | |
b123f56e | 1391 | } |
c413b9b9 | 1392 | |
1024c5f4 | 1393 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
702c026b BZ |
1394 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1395 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; | |
1024c5f4 | 1396 | |
6b492496 BZ |
1397 | if (d->max_sectors) |
1398 | hwif->rqsize = d->max_sectors; | |
c413b9b9 BZ |
1399 | |
1400 | /* call chipset specific routine for each enabled port */ | |
1401 | if (d->init_hwif) | |
1402 | d->init_hwif(hwif); | |
c7f6f21a | 1403 | } |
bfa14b42 | 1404 | |
c7f6f21a BZ |
1405 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1406 | { | |
ac95beed BZ |
1407 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1408 | ||
1409 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1410 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1411 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1412 | } |
c413b9b9 BZ |
1413 | } |
1414 | ||
8cdf3100 BZ |
1415 | static unsigned int ide_indexes; |
1416 | ||
fe80b937 | 1417 | /** |
8cdf3100 | 1418 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1419 | * @d: IDE port info |
1420 | * | |
8cdf3100 | 1421 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1422 | */ |
1423 | ||
8cdf3100 | 1424 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1425 | { |
8cdf3100 | 1426 | int idx = -ENOENT; |
fe80b937 | 1427 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1428 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1429 | |
1430 | /* | |
1431 | * Claim an unassigned slot. | |
1432 | * | |
1433 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1434 | * just in case there's another interface yet-to-be-scanned | |
1435 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1436 | * | |
1437 | * Unless there is a bootable card that does not use the standard | |
1438 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1439 | */ | |
8cdf3100 | 1440 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1441 | if (bootable) { |
1442 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1443 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1444 | } else { |
75d21fff BZ |
1445 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1446 | idx = ffz(ide_indexes | 3); | |
1447 | else if ((ide_indexes & 3) != 3) | |
1448 | idx = ffz(ide_indexes); | |
fe80b937 | 1449 | } |
8cdf3100 BZ |
1450 | if (idx >= 0) |
1451 | ide_indexes |= (1 << idx); | |
1452 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1453 | |
8cdf3100 BZ |
1454 | return idx; |
1455 | } | |
256c5f8e | 1456 | |
8cdf3100 BZ |
1457 | static void ide_free_port_slot(int idx) |
1458 | { | |
1459 | mutex_lock(&ide_cfg_mtx); | |
1460 | ide_indexes &= ~(1 << idx); | |
1461 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1462 | } |
fe80b937 | 1463 | |
a36223b0 | 1464 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
48c3c107 BZ |
1465 | { |
1466 | struct ide_host *host; | |
1467 | int i; | |
1468 | ||
1469 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
1470 | if (host == NULL) | |
1471 | return NULL; | |
1472 | ||
a36223b0 | 1473 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
48c3c107 | 1474 | ide_hwif_t *hwif; |
8cdf3100 | 1475 | int idx; |
48c3c107 BZ |
1476 | |
1477 | if (hws[i] == NULL) | |
1478 | continue; | |
1479 | ||
18de1017 BZ |
1480 | hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); |
1481 | if (hwif == NULL) | |
1482 | continue; | |
1483 | ||
8cdf3100 BZ |
1484 | idx = ide_find_port_slot(d); |
1485 | if (idx < 0) { | |
1486 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1487 | d ? d->name : "ide"); | |
18de1017 | 1488 | kfree(hwif); |
8cdf3100 | 1489 | continue; |
48c3c107 | 1490 | } |
8cdf3100 | 1491 | |
8cdf3100 BZ |
1492 | ide_init_port_data(hwif, idx); |
1493 | ||
08da591e BZ |
1494 | hwif->host = host; |
1495 | ||
8cdf3100 BZ |
1496 | host->ports[i] = hwif; |
1497 | host->n_ports++; | |
48c3c107 BZ |
1498 | } |
1499 | ||
1500 | if (host->n_ports == 0) { | |
1501 | kfree(host); | |
1502 | return NULL; | |
1503 | } | |
1504 | ||
6cdf6eb3 BZ |
1505 | if (hws[0]) |
1506 | host->dev[0] = hws[0]->dev; | |
1507 | ||
feb22b7f BZ |
1508 | if (d) { |
1509 | host->init_chipset = d->init_chipset; | |
ef0b0427 | 1510 | host->host_flags = d->host_flags; |
feb22b7f | 1511 | } |
ef0b0427 | 1512 | |
48c3c107 BZ |
1513 | return host; |
1514 | } | |
48c3c107 BZ |
1515 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1516 | ||
1517 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, | |
1518 | hw_regs_t **hws) | |
c413b9b9 BZ |
1519 | { |
1520 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1521 | int i, j = 0; |
8447d9d5 | 1522 | |
a36223b0 | 1523 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1524 | hwif = host->ports[i]; |
48c3c107 | 1525 | |
e0d00207 | 1526 | if (hwif == NULL) { |
c413b9b9 BZ |
1527 | mate = NULL; |
1528 | continue; | |
1529 | } | |
1530 | ||
c97c6aca | 1531 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1532 | ide_port_apply_params(hwif); |
1533 | ||
1534 | if (d == NULL) { | |
1535 | mate = NULL; | |
123995b9 BZ |
1536 | } else { |
1537 | if ((i & 1) && mate) { | |
1538 | hwif->mate = mate; | |
1539 | mate->mate = hwif; | |
1540 | } | |
9fd91d95 | 1541 | |
123995b9 | 1542 | mate = (i & 1) ? NULL : hwif; |
c413b9b9 | 1543 | |
123995b9 BZ |
1544 | ide_init_port(hwif, i & 1, d); |
1545 | ide_port_cable_detect(hwif); | |
1546 | } | |
c413b9b9 | 1547 | |
7704ca2a | 1548 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1549 | } |
1550 | ||
a36223b0 | 1551 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1552 | hwif = host->ports[i]; |
ba6560aa | 1553 | |
e0d00207 BZ |
1554 | if (hwif == NULL) |
1555 | continue; | |
139ddfca | 1556 | |
eb716beb BZ |
1557 | if (ide_probe_port(hwif) == 0) |
1558 | hwif->present = 1; | |
a14dc574 BZ |
1559 | |
1560 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1561 | !hwif->mate->present) | |
1562 | ide_register_port(hwif); | |
1563 | ||
eb716beb BZ |
1564 | if (hwif->present) |
1565 | ide_port_tune_devices(hwif); | |
2e13093a | 1566 | } |
ba6560aa | 1567 | |
a36223b0 | 1568 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1569 | hwif = host->ports[i]; |
2e13093a | 1570 | |
e0d00207 BZ |
1571 | if (hwif == NULL) |
1572 | continue; | |
ba6560aa BZ |
1573 | |
1574 | if (hwif_init(hwif) == 0) { | |
1575 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1576 | "interface\n", hwif->name); | |
48535651 | 1577 | hwif->present = 0; |
ba6560aa BZ |
1578 | continue; |
1579 | } | |
decdc3f0 | 1580 | |
eb716beb | 1581 | if (hwif->present) |
e415e495 EO |
1582 | if (ide_port_setup_devices(hwif) == 0) { |
1583 | hwif->present = 0; | |
1584 | continue; | |
1585 | } | |
1586 | ||
1587 | j++; | |
26042d05 | 1588 | |
decdc3f0 | 1589 | ide_acpi_init(hwif); |
eb716beb BZ |
1590 | |
1591 | if (hwif->present) | |
1592 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1593 | } |
1594 | ||
a36223b0 | 1595 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1596 | hwif = host->ports[i]; |
2e13093a | 1597 | |
e0d00207 BZ |
1598 | if (hwif == NULL) |
1599 | continue; | |
ba6560aa | 1600 | |
eb716beb | 1601 | if (hwif->present) |
ba6560aa | 1602 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1603 | } |
1604 | ||
a36223b0 | 1605 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1606 | hwif = host->ports[i]; |
327617e1 | 1607 | |
e0d00207 BZ |
1608 | if (hwif == NULL) |
1609 | continue; | |
327617e1 | 1610 | |
eb716beb BZ |
1611 | ide_sysfs_register_port(hwif); |
1612 | ide_proc_register_port(hwif); | |
1613 | ||
1614 | if (hwif->present) | |
d9270a3f | 1615 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1616 | } |
1617 | ||
e0d00207 | 1618 | return j ? 0 : -1; |
8447d9d5 | 1619 | } |
48c3c107 | 1620 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1621 | |
6f904d01 BZ |
1622 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1623 | struct ide_host **hostp) | |
1624 | { | |
1625 | struct ide_host *host; | |
8a69580e | 1626 | int rc; |
6f904d01 BZ |
1627 | |
1628 | host = ide_host_alloc(d, hws); | |
1629 | if (host == NULL) | |
1630 | return -ENOMEM; | |
1631 | ||
8a69580e BZ |
1632 | rc = ide_host_register(host, d, hws); |
1633 | if (rc) { | |
1634 | ide_host_free(host); | |
1635 | return rc; | |
1636 | } | |
6f904d01 BZ |
1637 | |
1638 | if (hostp) | |
1639 | *hostp = host; | |
1640 | ||
1641 | return 0; | |
1642 | } | |
1643 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1644 | ||
8a69580e | 1645 | void ide_host_free(struct ide_host *host) |
151575e4 | 1646 | { |
8cdf3100 | 1647 | ide_hwif_t *hwif; |
151575e4 | 1648 | int i; |
8447d9d5 | 1649 | |
a36223b0 | 1650 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
8cdf3100 BZ |
1651 | hwif = host->ports[i]; |
1652 | ||
1653 | if (hwif == NULL) | |
1654 | continue; | |
1655 | ||
8cdf3100 | 1656 | ide_free_port_slot(hwif->index); |
18de1017 | 1657 | kfree(hwif); |
c97c6aca | 1658 | } |
151575e4 | 1659 | |
48c3c107 | 1660 | kfree(host); |
151575e4 | 1661 | } |
8a69580e BZ |
1662 | EXPORT_SYMBOL_GPL(ide_host_free); |
1663 | ||
1664 | void ide_host_remove(struct ide_host *host) | |
1665 | { | |
1666 | int i; | |
1667 | ||
a36223b0 | 1668 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
8a69580e BZ |
1669 | if (host->ports[i]) |
1670 | ide_unregister(host->ports[i]); | |
1671 | } | |
1672 | ||
1673 | ide_host_free(host); | |
1674 | } | |
48c3c107 | 1675 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1676 | |
1677 | void ide_port_scan(ide_hwif_t *hwif) | |
1678 | { | |
9fd91d95 | 1679 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1680 | ide_port_cable_detect(hwif); |
1681 | ide_port_init_devices(hwif); | |
1682 | ||
1683 | if (ide_probe_port(hwif) < 0) | |
1684 | return; | |
1685 | ||
1686 | hwif->present = 1; | |
1687 | ||
1688 | ide_port_tune_devices(hwif); | |
1689 | ide_acpi_port_init_devices(hwif); | |
1690 | ide_port_setup_devices(hwif); | |
1691 | hwif_register_devices(hwif); | |
1692 | ide_proc_port_register_devices(hwif); | |
1693 | } | |
1694 | EXPORT_SYMBOL_GPL(ide_port_scan); |