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Commit | Line | Data |
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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 | |
2ebe1d9e | 184 | * @id: buffer for IDENTIFY data |
1da177e4 LT |
185 | * |
186 | * Called when we have issued a drive identify command to | |
187 | * read and parse the results. This function is run with | |
188 | * interrupts disabled. | |
189 | */ | |
047140ae | 190 | |
2ebe1d9e | 191 | static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id) |
1da177e4 | 192 | { |
898ec223 | 193 | ide_hwif_t *hwif = drive->hwif; |
4dde4492 | 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 | 235 | |
1da177e4 | 236 | return; |
1da177e4 LT |
237 | err_misc: |
238 | kfree(id); | |
97100fc8 | 239 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
240 | } |
241 | ||
242 | /** | |
2ebe1d9e | 243 | * ide_dev_read_id - send ATA/ATAPI IDENTIFY command |
1da177e4 LT |
244 | * @drive: drive to identify |
245 | * @cmd: command to use | |
2ebe1d9e | 246 | * @id: buffer for IDENTIFY data |
1da177e4 | 247 | * |
2ebe1d9e | 248 | * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. |
1da177e4 LT |
249 | * |
250 | * Returns: 0 device was identified | |
251 | * 1 device timed-out (no response to identify request) | |
252 | * 2 device aborted the command (refused to identify itself) | |
253 | */ | |
254 | ||
2ebe1d9e | 255 | int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id) |
1da177e4 | 256 | { |
898ec223 | 257 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 | 258 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 259 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 260 | int use_altstatus = 0, rc; |
1da177e4 LT |
261 | unsigned long timeout; |
262 | u8 s = 0, a = 0; | |
263 | ||
a182807a BZ |
264 | /* |
265 | * Disable device IRQ. Otherwise we'll get spurious interrupts | |
266 | * during the identify phase that the IRQ handler isn't expecting. | |
267 | */ | |
268 | if (io_ports->ctl_addr) | |
269 | tp_ops->set_irq(hwif, 0); | |
270 | ||
1da177e4 LT |
271 | /* take a deep breath */ |
272 | msleep(50); | |
273 | ||
6636487e BZ |
274 | if (io_ports->ctl_addr && |
275 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { | |
374e042c BZ |
276 | a = tp_ops->read_altstatus(hwif); |
277 | s = tp_ops->read_status(hwif); | |
3a7d2484 | 278 | if ((a ^ s) & ~ATA_IDX) |
1da177e4 | 279 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
280 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
281 | "instead of ALTSTATUS(0x%02x)\n", | |
282 | drive->name, s, a); | |
283 | else | |
1da177e4 | 284 | /* use non-intrusive polling */ |
c47137a9 BZ |
285 | use_altstatus = 1; |
286 | } | |
1da177e4 LT |
287 | |
288 | /* set features register for atapi | |
289 | * identify command to be sure of reply | |
290 | */ | |
aaaade3f | 291 | if (cmd == ATA_CMD_ID_ATAPI) { |
4e65837b BZ |
292 | ide_task_t task; |
293 | ||
294 | memset(&task, 0, sizeof(task)); | |
295 | /* disable DMA & overlap */ | |
296 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
297 | ||
374e042c | 298 | tp_ops->tf_load(drive, &task); |
4e65837b | 299 | } |
1da177e4 LT |
300 | |
301 | /* ask drive for ID */ | |
374e042c | 302 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 303 | |
aaaade3f | 304 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
b163f46d BZ |
305 | |
306 | if (ide_busy_sleep(hwif, timeout, use_altstatus)) | |
307 | return 1; | |
1da177e4 | 308 | |
3a7d2484 | 309 | /* wait for IRQ and ATA_DRQ */ |
1da177e4 | 310 | msleep(50); |
374e042c | 311 | s = tp_ops->read_status(hwif); |
c47137a9 | 312 | |
3a7d2484 | 313 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 | 314 | /* drive returned ID */ |
2ebe1d9e | 315 | do_identify(drive, cmd, id); |
1da177e4 LT |
316 | /* drive responded with ID */ |
317 | rc = 0; | |
318 | /* clear drive IRQ */ | |
374e042c | 319 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
320 | } else { |
321 | /* drive refused ID */ | |
322 | rc = 2; | |
323 | } | |
324 | return rc; | |
325 | } | |
326 | ||
b163f46d | 327 | int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) |
3a5015cc | 328 | { |
3a5015cc BZ |
329 | u8 stat; |
330 | ||
b163f46d BZ |
331 | timeout += jiffies; |
332 | ||
3a5015cc | 333 | do { |
b163f46d BZ |
334 | msleep(50); /* give drive a breather */ |
335 | stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) | |
336 | : hwif->tp_ops->read_status(hwif); | |
3a7d2484 | 337 | if ((stat & ATA_BUSY) == 0) |
3a5015cc BZ |
338 | return 0; |
339 | } while (time_before(jiffies, timeout)); | |
340 | ||
b163f46d | 341 | return 1; /* drive timed-out */ |
3a5015cc | 342 | } |
1da177e4 | 343 | |
1f2efb82 BZ |
344 | static u8 ide_read_device(ide_drive_t *drive) |
345 | { | |
346 | ide_task_t task; | |
347 | ||
348 | memset(&task, 0, sizeof(task)); | |
349 | task.tf_flags = IDE_TFLAG_IN_DEVICE; | |
350 | ||
374e042c | 351 | drive->hwif->tp_ops->tf_read(drive, &task); |
1f2efb82 BZ |
352 | |
353 | return task.tf.device; | |
354 | } | |
355 | ||
1da177e4 LT |
356 | /** |
357 | * do_probe - probe an IDE device | |
358 | * @drive: drive to probe | |
359 | * @cmd: command to use | |
360 | * | |
361 | * do_probe() has the difficult job of finding a drive if it exists, | |
362 | * without getting hung up if it doesn't exist, without trampling on | |
363 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
364 | * | |
365 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
366 | * but does not respond right away, the probe will "hang in there" | |
367 | * for the maximum wait time (about 30 seconds), otherwise it will | |
368 | * exit much more quickly. | |
369 | * | |
370 | * Returns: 0 device was identified | |
371 | * 1 device timed-out (no response to identify request) | |
372 | * 2 device aborted the command (refused to identify itself) | |
373 | * 3 bad status from device (possible for ATAPI drives) | |
374 | * 4 probe was not attempted because failure was obvious | |
375 | */ | |
376 | ||
377 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
378 | { | |
898ec223 | 379 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 380 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
2ebe1d9e | 381 | u16 *id = drive->id; |
57b55275 | 382 | int rc; |
97100fc8 BZ |
383 | u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
384 | ||
385 | /* avoid waiting for inappropriate probes */ | |
386 | if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) | |
387 | return 4; | |
1da177e4 | 388 | |
1da177e4 | 389 | #ifdef DEBUG |
1b8ebad8 | 390 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
97100fc8 | 391 | drive->name, present, drive->media, |
aaaade3f | 392 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
393 | #endif |
394 | ||
395 | /* needed for some systems | |
396 | * (e.g. crw9624 as drive0 with disk as slave) | |
397 | */ | |
398 | msleep(50); | |
399 | SELECT_DRIVE(drive); | |
400 | msleep(50); | |
1f2efb82 | 401 | |
7f612f27 | 402 | if (ide_read_device(drive) != drive->select && present == 0) { |
123995b9 | 403 | if (drive->dn & 1) { |
1da177e4 | 404 | /* exit with drive0 selected */ |
5e7f3a46 | 405 | SELECT_DRIVE(hwif->devices[0]); |
3a7d2484 | 406 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
407 | msleep(50); |
408 | } | |
409 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
410 | return 3; | |
411 | } | |
412 | ||
374e042c | 413 | stat = tp_ops->read_status(hwif); |
c47137a9 | 414 | |
3a7d2484 | 415 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
97100fc8 | 416 | present || cmd == ATA_CMD_ID_ATAPI) { |
2ebe1d9e BZ |
417 | rc = ide_dev_read_id(drive, cmd, id); |
418 | if (rc) | |
1da177e4 | 419 | /* failed: try again */ |
2ebe1d9e | 420 | rc = ide_dev_read_id(drive, cmd, id); |
57b55275 | 421 | |
374e042c | 422 | stat = tp_ops->read_status(hwif); |
57b55275 | 423 | |
3a7d2484 | 424 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
425 | return 4; |
426 | ||
aaaade3f | 427 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
428 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
429 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 430 | msleep(50); |
e81a3bde | 431 | SELECT_DRIVE(drive); |
1da177e4 | 432 | msleep(50); |
aaaade3f | 433 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
b163f46d | 434 | (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); |
2ebe1d9e | 435 | rc = ide_dev_read_id(drive, cmd, id); |
1da177e4 | 436 | } |
57b55275 BZ |
437 | |
438 | /* ensure drive IRQ is clear */ | |
374e042c | 439 | stat = tp_ops->read_status(hwif); |
57b55275 | 440 | |
1da177e4 | 441 | if (rc == 1) |
57b55275 BZ |
442 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
443 | drive->name, stat); | |
1da177e4 LT |
444 | } else { |
445 | /* not present or maybe ATAPI */ | |
446 | rc = 3; | |
447 | } | |
123995b9 | 448 | if (drive->dn & 1) { |
1da177e4 | 449 | /* exit with drive0 selected */ |
5e7f3a46 | 450 | SELECT_DRIVE(hwif->devices[0]); |
1da177e4 LT |
451 | msleep(50); |
452 | /* ensure drive irq is clear */ | |
374e042c | 453 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
454 | } |
455 | return rc; | |
456 | } | |
457 | ||
1da177e4 LT |
458 | /** |
459 | * probe_for_drives - upper level drive probe | |
460 | * @drive: drive to probe for | |
461 | * | |
462 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
463 | * and presents things to the user as needed. | |
464 | * | |
465 | * Returns: 0 no device was found | |
97100fc8 BZ |
466 | * 1 device was found |
467 | * (note: IDE_DFLAG_PRESENT might still be not set) | |
1da177e4 | 468 | */ |
047140ae BZ |
469 | |
470 | static u8 probe_for_drive(ide_drive_t *drive) | |
1da177e4 | 471 | { |
4dde4492 | 472 | char *m; |
1bd4c1f4 BZ |
473 | int rc; |
474 | u8 cmd; | |
4dde4492 | 475 | |
1da177e4 LT |
476 | /* |
477 | * In order to keep things simple we have an id | |
478 | * block for all drives at all times. If the device | |
479 | * is pre ATA or refuses ATA/ATAPI identify we | |
480 | * will add faked data to this. | |
481 | * | |
482 | * Also note that 0 everywhere means "can't do X" | |
483 | */ | |
484 | ||
97100fc8 BZ |
485 | drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
486 | ||
151a6701 | 487 | drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); |
97100fc8 | 488 | if (drive->id == NULL) { |
1da177e4 LT |
489 | printk(KERN_ERR "ide: out of memory for id data.\n"); |
490 | return 0; | |
491 | } | |
4dde4492 BZ |
492 | |
493 | m = (char *)&drive->id[ATA_ID_PROD]; | |
494 | strcpy(m, "UNKNOWN"); | |
495 | ||
1da177e4 | 496 | /* skip probing? */ |
97100fc8 | 497 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
1da177e4 | 498 | /* if !(success||timed-out) */ |
1bd4c1f4 BZ |
499 | cmd = ATA_CMD_ID_ATA; |
500 | rc = do_probe(drive, cmd); | |
501 | if (rc >= 2) { | |
1da177e4 | 502 | /* look for ATAPI device */ |
1bd4c1f4 BZ |
503 | cmd = ATA_CMD_ID_ATAPI; |
504 | rc = do_probe(drive, cmd); | |
505 | } | |
c36a7e98 | 506 | |
97100fc8 | 507 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
508 | /* drive not found */ |
509 | return 0; | |
4dde4492 | 510 | |
1da177e4 | 511 | /* identification failed? */ |
97100fc8 | 512 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
513 | if (drive->media == ide_disk) { |
514 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
515 | drive->name, drive->cyl, | |
516 | drive->head, drive->sect); | |
517 | } else if (drive->media == ide_cdrom) { | |
518 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
519 | } else { | |
520 | /* nuke it */ | |
521 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
97100fc8 | 522 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 | 523 | } |
1bd4c1f4 BZ |
524 | } else { |
525 | if (cmd == ATA_CMD_ID_ATAPI) | |
526 | ide_classify_atapi_dev(drive); | |
527 | else | |
528 | ide_classify_ata_dev(drive); | |
1da177e4 | 529 | } |
1da177e4 | 530 | } |
97100fc8 BZ |
531 | |
532 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 | 533 | return 0; |
97100fc8 | 534 | |
1da177e4 | 535 | /* The drive wasn't being helpful. Add generic info only */ |
97100fc8 | 536 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
537 | generic_id(drive); |
538 | return 1; | |
539 | } | |
540 | ||
541 | if (drive->media == ide_disk) { | |
542 | ide_disk_init_chs(drive); | |
543 | ide_disk_init_mult_count(drive); | |
544 | } | |
545 | ||
97100fc8 | 546 | return !!(drive->dev_flags & IDE_DFLAG_PRESENT); |
1da177e4 LT |
547 | } |
548 | ||
fc410698 | 549 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
550 | { |
551 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
552 | ||
f36d4024 | 553 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
554 | } |
555 | ||
f74c9141 | 556 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 557 | { |
349ae23f RD |
558 | int ret; |
559 | ||
1da177e4 | 560 | /* register with global device tree */ |
dc09c784 | 561 | dev_set_name(&hwif->gendev, hwif->name); |
1da177e4 | 562 | hwif->gendev.driver_data = hwif; |
bb54affa AS |
563 | if (hwif->gendev.parent == NULL) |
564 | hwif->gendev.parent = hwif->dev; | |
1da177e4 | 565 | hwif->gendev.release = hwif_release_dev; |
96d40941 | 566 | |
349ae23f | 567 | ret = device_register(&hwif->gendev); |
f74c9141 | 568 | if (ret < 0) { |
349ae23f | 569 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 570 | __func__, ret); |
f74c9141 BZ |
571 | goto out; |
572 | } | |
573 | ||
3ee074bf GKH |
574 | hwif->portdev = device_create(ide_port_class, &hwif->gendev, |
575 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
576 | if (IS_ERR(hwif->portdev)) { |
577 | ret = PTR_ERR(hwif->portdev); | |
578 | device_unregister(&hwif->gendev); | |
579 | } | |
f74c9141 BZ |
580 | out: |
581 | return ret; | |
1da177e4 LT |
582 | } |
583 | ||
c860a8f2 BZ |
584 | /** |
585 | * ide_port_wait_ready - wait for port to become ready | |
586 | * @hwif: IDE port | |
587 | * | |
588 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
589 | * platforms. Typical cases are: | |
590 | * | |
591 | * - The firmware hard reset the disk before booting the kernel, | |
592 | * the drive is still doing it's poweron-reset sequence, that | |
593 | * can take up to 30 seconds. | |
594 | * | |
595 | * - The firmware does nothing (or no firmware), the device is | |
596 | * still in POST state (same as above actually). | |
597 | * | |
598 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
599 | * their reset sequence even when they are non-selected slave | |
600 | * devices, thus preventing discovery of the main HD. | |
601 | * | |
602 | * Doing this wait-for-non-busy should not harm any existing | |
603 | * configuration and fix some issues like the above. | |
604 | * | |
605 | * BenH. | |
606 | * | |
607 | * Returns 0 on success, error code (< 0) otherwise. | |
608 | */ | |
609 | ||
610 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 611 | { |
2bd24a1c BZ |
612 | ide_drive_t *drive; |
613 | int i, rc; | |
1da177e4 LT |
614 | |
615 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
616 | ||
617 | /* Let HW settle down a bit from whatever init state we | |
618 | * come from */ | |
619 | mdelay(2); | |
620 | ||
621 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
622 | * I know of at least one disk who takes 31 seconds, I use 35 | |
623 | * here to be safe | |
624 | */ | |
625 | rc = ide_wait_not_busy(hwif, 35000); | |
626 | if (rc) | |
627 | return rc; | |
628 | ||
629 | /* Now make sure both master & slave are ready */ | |
2bd24a1c | 630 | ide_port_for_each_dev(i, drive, hwif) { |
8266105b | 631 | /* Ignore disks that we will not probe for later. */ |
97100fc8 BZ |
632 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
633 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
8266105b | 634 | SELECT_DRIVE(drive); |
374e042c | 635 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
636 | mdelay(2); |
637 | rc = ide_wait_not_busy(hwif, 35000); | |
638 | if (rc) | |
639 | goto out; | |
640 | } else | |
641 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
642 | drive->name); | |
643 | } | |
644 | out: | |
1da177e4 | 645 | /* Exit function with master reselected (let's be sane) */ |
2bd24a1c | 646 | if (i) |
5e7f3a46 | 647 | SELECT_DRIVE(hwif->devices[0]); |
8266105b | 648 | |
1da177e4 LT |
649 | return rc; |
650 | } | |
651 | ||
652 | /** | |
653 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 654 | * @dev1: slave device |
1da177e4 LT |
655 | * |
656 | * Analyse the drives on the interface and attempt to decide if we | |
657 | * have the same drive viewed twice. This occurs with crap CF adapters | |
658 | * and PCMCIA sometimes. | |
659 | */ | |
660 | ||
4dde4492 | 661 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 662 | { |
5e7f3a46 | 663 | ide_drive_t *dev0 = dev1->hwif->devices[0]; |
1da177e4 | 664 | |
97100fc8 | 665 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
666 | return; |
667 | ||
668 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
669 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
670 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
671 | return; |
672 | ||
673 | /* Serial numbers do not match */ | |
4dde4492 BZ |
674 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
675 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
676 | return; |
677 | ||
678 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 679 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
680 | return; |
681 | ||
682 | /* Appears to be an IDE flash adapter with decode bugs */ | |
683 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
684 | ||
97100fc8 | 685 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
686 | } |
687 | ||
688 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
689 | ||
9d501529 | 690 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 691 | { |
2bd24a1c | 692 | ide_drive_t *drive; |
1da177e4 | 693 | unsigned int irqd; |
2bd24a1c | 694 | int i, rc = -ENODEV; |
a14dc574 BZ |
695 | |
696 | BUG_ON(hwif->present); | |
1da177e4 | 697 | |
5e7f3a46 BZ |
698 | if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && |
699 | (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 700 | return -EACCES; |
1da177e4 | 701 | |
1da177e4 LT |
702 | /* |
703 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
704 | * we'll install our IRQ driver much later... | |
705 | */ | |
706 | irqd = hwif->irq; | |
707 | if (irqd) | |
708 | disable_irq(hwif->irq); | |
709 | ||
c860a8f2 | 710 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
711 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
712 | ||
713 | /* | |
f367bed0 BZ |
714 | * Second drive should only exist if first drive was found, |
715 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 716 | */ |
2bd24a1c | 717 | ide_port_for_each_dev(i, drive, hwif) { |
1da177e4 | 718 | (void) probe_for_drive(drive); |
97100fc8 | 719 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 720 | rc = 0; |
1da177e4 | 721 | } |
e460a597 | 722 | |
1da177e4 LT |
723 | /* |
724 | * Use cached IRQ number. It might be (and is...) changed by probe | |
725 | * code above | |
726 | */ | |
727 | if (irqd) | |
728 | enable_irq(irqd); | |
729 | ||
a14dc574 | 730 | return rc; |
e84e7ea7 BZ |
731 | } |
732 | ||
733 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
734 | { | |
ac95beed | 735 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c BZ |
736 | ide_drive_t *drive; |
737 | int i; | |
f01393e4 | 738 | |
7ed5b157 BZ |
739 | ide_port_for_each_present_dev(i, drive, hwif) { |
740 | if (port_ops && port_ops->quirkproc) | |
741 | port_ops->quirkproc(drive); | |
f01393e4 | 742 | } |
0380dad4 | 743 | |
7ed5b157 BZ |
744 | ide_port_for_each_present_dev(i, drive, hwif) { |
745 | ide_set_max_pio(drive); | |
1da177e4 | 746 | |
7ed5b157 | 747 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 748 | |
7ed5b157 BZ |
749 | if (hwif->dma_ops) |
750 | ide_set_dma(drive); | |
1da177e4 LT |
751 | } |
752 | } | |
753 | ||
1da177e4 LT |
754 | /* |
755 | * init request queue | |
756 | */ | |
757 | static int ide_init_queue(ide_drive_t *drive) | |
758 | { | |
165125e1 | 759 | struct request_queue *q; |
898ec223 | 760 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
761 | int max_sectors = 256; |
762 | int max_sg_entries = PRD_ENTRIES; | |
763 | ||
764 | /* | |
765 | * Our default set up assumes the normal IDE case, | |
766 | * that is 64K segmenting, standard PRD setup | |
767 | * and LBA28. Some drivers then impose their own | |
768 | * limits and LBA48 we could raise it but as yet | |
769 | * do not. | |
770 | */ | |
1946089a | 771 | |
201bffa4 | 772 | q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); |
1da177e4 LT |
773 | if (!q) |
774 | return 1; | |
775 | ||
776 | q->queuedata = drive; | |
777 | blk_queue_segment_boundary(q, 0xffff); | |
778 | ||
1da177e4 LT |
779 | if (hwif->rqsize < max_sectors) |
780 | max_sectors = hwif->rqsize; | |
781 | blk_queue_max_sectors(q, max_sectors); | |
782 | ||
783 | #ifdef CONFIG_PCI | |
784 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
785 | * creates segments that don't completely match our boundary | |
786 | * requirements and thus need to be broken up again. Because it | |
787 | * doesn't align properly either, we may actually have to break up | |
788 | * to more segments than what was we got in the first place, a max | |
789 | * worst case is twice as many. | |
790 | * This will be fixed once we teach pci_map_sg() about our boundary | |
791 | * requirements, hopefully soon. *FIXME* | |
792 | */ | |
793 | if (!PCI_DMA_BUS_IS_PHYS) | |
794 | max_sg_entries >>= 1; | |
795 | #endif /* CONFIG_PCI */ | |
796 | ||
797 | blk_queue_max_hw_segments(q, max_sg_entries); | |
798 | blk_queue_max_phys_segments(q, max_sg_entries); | |
799 | ||
800 | /* assign drive queue */ | |
801 | drive->queue = q; | |
802 | ||
803 | /* needs drive->queue to be set */ | |
804 | ide_toggle_bounce(drive, 1); | |
805 | ||
1da177e4 LT |
806 | return 0; |
807 | } | |
808 | ||
b40d1b88 BZ |
809 | static DEFINE_MUTEX(ide_cfg_mtx); |
810 | ||
d5bc6592 BZ |
811 | /* |
812 | * For any present drive: | |
813 | * - allocate the block device queue | |
d5bc6592 | 814 | */ |
e415e495 | 815 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 816 | { |
2bd24a1c | 817 | ide_drive_t *drive; |
e415e495 | 818 | int i, j = 0; |
d5bc6592 | 819 | |
26042d05 | 820 | mutex_lock(&ide_cfg_mtx); |
7ed5b157 | 821 | ide_port_for_each_present_dev(i, drive, hwif) { |
d5bc6592 BZ |
822 | if (ide_init_queue(drive)) { |
823 | printk(KERN_ERR "ide: failed to init %s\n", | |
824 | drive->name); | |
e415e495 EO |
825 | kfree(drive->id); |
826 | drive->id = NULL; | |
827 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; | |
d5bc6592 BZ |
828 | continue; |
829 | } | |
830 | ||
e415e495 | 831 | j++; |
d5bc6592 | 832 | } |
26042d05 | 833 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
834 | |
835 | return j; | |
d5bc6592 BZ |
836 | } |
837 | ||
1da177e4 | 838 | /* |
b65fac32 | 839 | * This routine sets up the IRQ for an IDE interface. |
1da177e4 LT |
840 | */ |
841 | static int init_irq (ide_hwif_t *hwif) | |
842 | { | |
4c3032d8 | 843 | struct ide_io_ports *io_ports = &hwif->io_ports; |
849d7130 | 844 | irq_handler_t irq_handler; |
ae86afae | 845 | int sa = 0; |
1da177e4 | 846 | |
849d7130 SG |
847 | irq_handler = hwif->host->irq_handler; |
848 | if (irq_handler == NULL) | |
849 | irq_handler = ide_intr; | |
850 | ||
7b892806 | 851 | #if defined(__mc68000__) |
ae86afae | 852 | sa = IRQF_SHARED; |
e1771e20 | 853 | #endif /* __mc68000__ */ |
1da177e4 | 854 | |
ae86afae BZ |
855 | if (hwif->chipset == ide_pci) |
856 | sa = IRQF_SHARED; | |
1da177e4 | 857 | |
ae86afae BZ |
858 | if (io_ports->ctl_addr) |
859 | hwif->tp_ops->set_irq(hwif, 1); | |
1da177e4 | 860 | |
849d7130 | 861 | if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) |
b65fac32 | 862 | goto out_up; |
1da177e4 | 863 | |
8a0e7e14 BZ |
864 | if (!hwif->rqsize) { |
865 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
866 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
867 | hwif->rqsize = 256; | |
868 | else | |
869 | hwif->rqsize = 65536; | |
870 | } | |
871 | ||
7b892806 | 872 | #if !defined(__mc68000__) |
1b8ebad8 | 873 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
874 | io_ports->data_addr, io_ports->status_addr, |
875 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 876 | #else |
1b8ebad8 | 877 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 878 | io_ports->data_addr, hwif->irq); |
7b892806 | 879 | #endif /* __mc68000__ */ |
b65fac32 BZ |
880 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) |
881 | printk(KERN_CONT " (serialized)"); | |
1b8ebad8 | 882 | printk(KERN_CONT "\n"); |
d5bc6592 | 883 | |
1da177e4 | 884 | return 0; |
1da177e4 | 885 | out_up: |
1da177e4 LT |
886 | return 1; |
887 | } | |
888 | ||
889 | static int ata_lock(dev_t dev, void *data) | |
890 | { | |
891 | /* FIXME: we want to pin hwif down */ | |
892 | return 0; | |
893 | } | |
894 | ||
895 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
896 | { | |
897 | ide_hwif_t *hwif = data; | |
898 | int unit = *part >> PARTN_BITS; | |
5e7f3a46 | 899 | ide_drive_t *drive = hwif->devices[unit]; |
97100fc8 BZ |
900 | |
901 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
902 | return NULL; |
903 | ||
904 | if (drive->media == ide_disk) | |
905 | request_module("ide-disk"); | |
1da177e4 LT |
906 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
907 | request_module("ide-cd"); | |
908 | if (drive->media == ide_tape) | |
909 | request_module("ide-tape"); | |
910 | if (drive->media == ide_floppy) | |
911 | request_module("ide-floppy"); | |
912 | ||
913 | return NULL; | |
914 | } | |
915 | ||
916 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
917 | { | |
918 | struct gendisk *p = data; | |
919 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 920 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
921 | } |
922 | ||
923 | static int exact_lock(dev_t dev, void *data) | |
924 | { | |
925 | struct gendisk *p = data; | |
926 | ||
927 | if (!get_disk(p)) | |
928 | return -1; | |
929 | return 0; | |
930 | } | |
931 | ||
932 | void ide_register_region(struct gendisk *disk) | |
933 | { | |
934 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
935 | disk->minors, NULL, exact_match, exact_lock, disk); | |
936 | } | |
937 | ||
938 | EXPORT_SYMBOL_GPL(ide_register_region); | |
939 | ||
940 | void ide_unregister_region(struct gendisk *disk) | |
941 | { | |
942 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
943 | disk->minors); | |
944 | } | |
945 | ||
946 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
947 | ||
948 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
949 | { | |
950 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 951 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
952 | |
953 | disk->major = hwif->major; | |
954 | disk->first_minor = unit << PARTN_BITS; | |
955 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
956 | disk->queue = drive->queue; | |
957 | } | |
958 | ||
959 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
960 | ||
961 | static void drive_release_dev (struct device *dev) | |
962 | { | |
963 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
b65fac32 | 964 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 965 | |
5b0c4b30 BZ |
966 | ide_proc_unregister_device(drive); |
967 | ||
b65fac32 | 968 | spin_lock_irq(&hwif->lock); |
6044ec88 JJ |
969 | kfree(drive->id); |
970 | drive->id = NULL; | |
97100fc8 | 971 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 972 | /* Messed up locking ... */ |
b65fac32 | 973 | spin_unlock_irq(&hwif->lock); |
8604affd | 974 | blk_cleanup_queue(drive->queue); |
b65fac32 | 975 | spin_lock_irq(&hwif->lock); |
8604affd | 976 | drive->queue = NULL; |
b65fac32 | 977 | spin_unlock_irq(&hwif->lock); |
8604affd | 978 | |
f36d4024 | 979 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
980 | } |
981 | ||
1da177e4 LT |
982 | static int hwif_init(ide_hwif_t *hwif) |
983 | { | |
1da177e4 | 984 | if (!hwif->irq) { |
8b07ed26 BZ |
985 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
986 | return 0; | |
1da177e4 | 987 | } |
1da177e4 | 988 | |
1da177e4 LT |
989 | if (register_blkdev(hwif->major, hwif->name)) |
990 | return 0; | |
991 | ||
992 | if (!hwif->sg_max_nents) | |
993 | hwif->sg_max_nents = PRD_ENTRIES; | |
994 | ||
45711f1a | 995 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
996 | GFP_KERNEL); |
997 | if (!hwif->sg_table) { | |
998 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
999 | goto out; | |
1000 | } | |
45711f1a JA |
1001 | |
1002 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 | 1003 | |
1da177e4 | 1004 | if (init_irq(hwif)) { |
8b07ed26 BZ |
1005 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1006 | hwif->name, hwif->irq); | |
1da177e4 LT |
1007 | goto out; |
1008 | } | |
1da177e4 | 1009 | |
3a4e7c96 BZ |
1010 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1011 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1012 | return 1; |
1013 | ||
1014 | out: | |
1015 | unregister_blkdev(hwif->major, hwif->name); | |
1016 | return 0; | |
1017 | } | |
1018 | ||
9601a607 BZ |
1019 | static void hwif_register_devices(ide_hwif_t *hwif) |
1020 | { | |
2bd24a1c | 1021 | ide_drive_t *drive; |
9601a607 BZ |
1022 | unsigned int i; |
1023 | ||
7ed5b157 | 1024 | ide_port_for_each_present_dev(i, drive, hwif) { |
c5d70cc7 BZ |
1025 | struct device *dev = &drive->gendev; |
1026 | int ret; | |
9601a607 | 1027 | |
dc09c784 | 1028 | dev_set_name(dev, "%u.%u", hwif->index, i); |
c5d70cc7 BZ |
1029 | dev->parent = &hwif->gendev; |
1030 | dev->bus = &ide_bus_type; | |
1031 | dev->driver_data = drive; | |
1032 | dev->release = drive_release_dev; | |
1033 | ||
1034 | ret = device_register(dev); | |
1035 | if (ret < 0) | |
1036 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1037 | "%d\n", __func__, ret); | |
9601a607 BZ |
1038 | } |
1039 | } | |
1040 | ||
7704ca2a BZ |
1041 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1042 | { | |
ac95beed | 1043 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c | 1044 | ide_drive_t *drive; |
7704ca2a BZ |
1045 | int i; |
1046 | ||
2bd24a1c | 1047 | ide_port_for_each_dev(i, drive, hwif) { |
123995b9 BZ |
1048 | drive->dn = i + hwif->channel * 2; |
1049 | ||
7704ca2a BZ |
1050 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1051 | drive->io_32bit = 1; | |
7610c4f5 BZ |
1052 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
1053 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
7704ca2a | 1054 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) |
97100fc8 | 1055 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1056 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1057 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1058 | |
e6d95bd1 BZ |
1059 | if (port_ops && port_ops->init_dev) |
1060 | port_ops->init_dev(drive); | |
1061 | } | |
7704ca2a BZ |
1062 | } |
1063 | ||
c413b9b9 BZ |
1064 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1065 | const struct ide_port_info *d) | |
8447d9d5 | 1066 | { |
b7691646 | 1067 | hwif->channel = port; |
c413b9b9 BZ |
1068 | |
1069 | if (d->chipset) | |
1070 | hwif->chipset = d->chipset; | |
1071 | ||
1072 | if (d->init_iops) | |
1073 | d->init_iops(hwif); | |
1074 | ||
23f8e4bf BZ |
1075 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1076 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1077 | hwif->pio_mask = d->pio_mask; |
1078 | ||
374e042c BZ |
1079 | if (d->tp_ops) |
1080 | hwif->tp_ops = d->tp_ops; | |
1081 | ||
ac95beed BZ |
1082 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1083 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1084 | hwif->port_ops = d->port_ops; | |
1085 | ||
c413b9b9 BZ |
1086 | hwif->swdma_mask = d->swdma_mask; |
1087 | hwif->mwdma_mask = d->mwdma_mask; | |
1088 | hwif->ultra_mask = d->udma_mask; | |
1089 | ||
b123f56e BZ |
1090 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1091 | int rc; | |
1092 | ||
592b5315 SS |
1093 | hwif->dma_ops = d->dma_ops; |
1094 | ||
b123f56e BZ |
1095 | if (d->init_dma) |
1096 | rc = d->init_dma(hwif, d); | |
1097 | else | |
1098 | rc = ide_hwif_setup_dma(hwif, d); | |
1099 | ||
1100 | if (rc < 0) { | |
1101 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
592b5315 SS |
1102 | |
1103 | hwif->dma_ops = NULL; | |
ebb00fb5 | 1104 | hwif->dma_base = 0; |
b123f56e BZ |
1105 | hwif->swdma_mask = 0; |
1106 | hwif->mwdma_mask = 0; | |
1107 | hwif->ultra_mask = 0; | |
592b5315 | 1108 | } |
b123f56e | 1109 | } |
c413b9b9 | 1110 | |
1024c5f4 | 1111 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
702c026b BZ |
1112 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1113 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; | |
1024c5f4 | 1114 | |
6b492496 BZ |
1115 | if (d->max_sectors) |
1116 | hwif->rqsize = d->max_sectors; | |
c413b9b9 BZ |
1117 | |
1118 | /* call chipset specific routine for each enabled port */ | |
1119 | if (d->init_hwif) | |
1120 | d->init_hwif(hwif); | |
c7f6f21a | 1121 | } |
bfa14b42 | 1122 | |
c7f6f21a BZ |
1123 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1124 | { | |
ac95beed BZ |
1125 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1126 | ||
1127 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1128 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1129 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1130 | } |
c413b9b9 BZ |
1131 | } |
1132 | ||
b40d1b88 BZ |
1133 | static const u8 ide_hwif_to_major[] = |
1134 | { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, | |
1135 | IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; | |
1136 | ||
1137 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
1138 | { | |
2bd24a1c BZ |
1139 | ide_drive_t *drive; |
1140 | int i; | |
b40d1b88 | 1141 | |
2bd24a1c BZ |
1142 | ide_port_for_each_dev(i, drive, hwif) { |
1143 | u8 j = (hwif->index * MAX_DRIVES) + i; | |
b40d1b88 BZ |
1144 | |
1145 | memset(drive, 0, sizeof(*drive)); | |
1146 | ||
1147 | drive->media = ide_disk; | |
2bd24a1c | 1148 | drive->select = (i << 4) | ATA_DEVICE_OBS; |
b40d1b88 BZ |
1149 | drive->hwif = hwif; |
1150 | drive->ready_stat = ATA_DRDY; | |
1151 | drive->bad_wstat = BAD_W_STAT; | |
1152 | drive->special.b.recalibrate = 1; | |
1153 | drive->special.b.set_geometry = 1; | |
1154 | drive->name[0] = 'h'; | |
1155 | drive->name[1] = 'd'; | |
1156 | drive->name[2] = 'a' + j; | |
1157 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; | |
1158 | ||
1159 | INIT_LIST_HEAD(&drive->list); | |
1160 | init_completion(&drive->gendev_rel_comp); | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) | |
1165 | { | |
b40d1b88 BZ |
1166 | /* fill in any non-zero initial values */ |
1167 | hwif->index = index; | |
1168 | hwif->major = ide_hwif_to_major[index]; | |
1169 | ||
1170 | hwif->name[0] = 'i'; | |
1171 | hwif->name[1] = 'd'; | |
1172 | hwif->name[2] = 'e'; | |
1173 | hwif->name[3] = '0' + index; | |
1174 | ||
7362951b BZ |
1175 | spin_lock_init(&hwif->lock); |
1176 | ||
1177 | init_timer(&hwif->timer); | |
1178 | hwif->timer.function = &ide_timer_expiry; | |
1179 | hwif->timer.data = (unsigned long)hwif; | |
1180 | ||
b40d1b88 BZ |
1181 | init_completion(&hwif->gendev_rel_comp); |
1182 | ||
1183 | hwif->tp_ops = &default_tp_ops; | |
1184 | ||
1185 | ide_port_init_devices_data(hwif); | |
1186 | } | |
1187 | ||
1188 | static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) | |
1189 | { | |
1190 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); | |
1191 | hwif->irq = hw->irq; | |
1192 | hwif->chipset = hw->chipset; | |
1193 | hwif->dev = hw->dev; | |
1194 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
1195 | hwif->ack_intr = hw->ack_intr; | |
1196 | hwif->config_data = hw->config; | |
1197 | } | |
1198 | ||
8cdf3100 BZ |
1199 | static unsigned int ide_indexes; |
1200 | ||
fe80b937 | 1201 | /** |
8cdf3100 | 1202 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1203 | * @d: IDE port info |
1204 | * | |
8cdf3100 | 1205 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1206 | */ |
1207 | ||
8cdf3100 | 1208 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1209 | { |
8cdf3100 | 1210 | int idx = -ENOENT; |
fe80b937 | 1211 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1212 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1213 | |
1214 | /* | |
1215 | * Claim an unassigned slot. | |
1216 | * | |
1217 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1218 | * just in case there's another interface yet-to-be-scanned | |
1219 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1220 | * | |
1221 | * Unless there is a bootable card that does not use the standard | |
1222 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1223 | */ | |
8cdf3100 | 1224 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1225 | if (bootable) { |
1226 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1227 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1228 | } else { |
75d21fff BZ |
1229 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1230 | idx = ffz(ide_indexes | 3); | |
1231 | else if ((ide_indexes & 3) != 3) | |
1232 | idx = ffz(ide_indexes); | |
fe80b937 | 1233 | } |
8cdf3100 BZ |
1234 | if (idx >= 0) |
1235 | ide_indexes |= (1 << idx); | |
1236 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1237 | |
8cdf3100 BZ |
1238 | return idx; |
1239 | } | |
256c5f8e | 1240 | |
8cdf3100 BZ |
1241 | static void ide_free_port_slot(int idx) |
1242 | { | |
1243 | mutex_lock(&ide_cfg_mtx); | |
1244 | ide_indexes &= ~(1 << idx); | |
1245 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1246 | } |
fe80b937 | 1247 | |
5e7f3a46 BZ |
1248 | static void ide_port_free_devices(ide_hwif_t *hwif) |
1249 | { | |
2bd24a1c | 1250 | ide_drive_t *drive; |
5e7f3a46 BZ |
1251 | int i; |
1252 | ||
2bd24a1c BZ |
1253 | ide_port_for_each_dev(i, drive, hwif) |
1254 | kfree(drive); | |
5e7f3a46 BZ |
1255 | } |
1256 | ||
1257 | static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) | |
1258 | { | |
1259 | int i; | |
1260 | ||
1261 | for (i = 0; i < MAX_DRIVES; i++) { | |
1262 | ide_drive_t *drive; | |
1263 | ||
1264 | drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); | |
1265 | if (drive == NULL) | |
1266 | goto out_nomem; | |
1267 | ||
1268 | hwif->devices[i] = drive; | |
1269 | } | |
1270 | return 0; | |
1271 | ||
1272 | out_nomem: | |
1273 | ide_port_free_devices(hwif); | |
1274 | return -ENOMEM; | |
1275 | } | |
1276 | ||
a36223b0 | 1277 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
48c3c107 BZ |
1278 | { |
1279 | struct ide_host *host; | |
a32296f9 BZ |
1280 | struct device *dev = hws[0] ? hws[0]->dev : NULL; |
1281 | int node = dev ? dev_to_node(dev) : -1; | |
48c3c107 BZ |
1282 | int i; |
1283 | ||
a32296f9 | 1284 | host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); |
48c3c107 BZ |
1285 | if (host == NULL) |
1286 | return NULL; | |
1287 | ||
a36223b0 | 1288 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
48c3c107 | 1289 | ide_hwif_t *hwif; |
8cdf3100 | 1290 | int idx; |
48c3c107 BZ |
1291 | |
1292 | if (hws[i] == NULL) | |
1293 | continue; | |
1294 | ||
a32296f9 | 1295 | hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); |
18de1017 BZ |
1296 | if (hwif == NULL) |
1297 | continue; | |
1298 | ||
5e7f3a46 BZ |
1299 | if (ide_port_alloc_devices(hwif, node) < 0) { |
1300 | kfree(hwif); | |
1301 | continue; | |
1302 | } | |
1303 | ||
8cdf3100 BZ |
1304 | idx = ide_find_port_slot(d); |
1305 | if (idx < 0) { | |
1306 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1307 | d ? d->name : "ide"); | |
18de1017 | 1308 | kfree(hwif); |
8cdf3100 | 1309 | continue; |
48c3c107 | 1310 | } |
8cdf3100 | 1311 | |
8cdf3100 BZ |
1312 | ide_init_port_data(hwif, idx); |
1313 | ||
08da591e BZ |
1314 | hwif->host = host; |
1315 | ||
8cdf3100 BZ |
1316 | host->ports[i] = hwif; |
1317 | host->n_ports++; | |
48c3c107 BZ |
1318 | } |
1319 | ||
1320 | if (host->n_ports == 0) { | |
1321 | kfree(host); | |
1322 | return NULL; | |
1323 | } | |
1324 | ||
a32296f9 | 1325 | host->dev[0] = dev; |
6cdf6eb3 | 1326 | |
feb22b7f BZ |
1327 | if (d) { |
1328 | host->init_chipset = d->init_chipset; | |
ef0b0427 | 1329 | host->host_flags = d->host_flags; |
feb22b7f | 1330 | } |
ef0b0427 | 1331 | |
48c3c107 BZ |
1332 | return host; |
1333 | } | |
48c3c107 BZ |
1334 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1335 | ||
9a100f4b BZ |
1336 | static void ide_port_free(ide_hwif_t *hwif) |
1337 | { | |
1338 | ide_port_free_devices(hwif); | |
1339 | ide_free_port_slot(hwif->index); | |
1340 | kfree(hwif); | |
1341 | } | |
1342 | ||
1343 | static void ide_disable_port(ide_hwif_t *hwif) | |
1344 | { | |
1345 | struct ide_host *host = hwif->host; | |
1346 | int i; | |
1347 | ||
1348 | printk(KERN_INFO "%s: disabling port\n", hwif->name); | |
1349 | ||
1350 | for (i = 0; i < MAX_HOST_PORTS; i++) { | |
1351 | if (host->ports[i] == hwif) { | |
1352 | host->ports[i] = NULL; | |
1353 | host->n_ports--; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | ide_port_free(hwif); | |
1358 | } | |
1359 | ||
48c3c107 BZ |
1360 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
1361 | hw_regs_t **hws) | |
c413b9b9 BZ |
1362 | { |
1363 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1364 | int i, j = 0; |
8447d9d5 | 1365 | |
2bd24a1c | 1366 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 | 1367 | if (hwif == NULL) { |
c413b9b9 BZ |
1368 | mate = NULL; |
1369 | continue; | |
1370 | } | |
1371 | ||
c97c6aca | 1372 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1373 | ide_port_apply_params(hwif); |
1374 | ||
1375 | if (d == NULL) { | |
1376 | mate = NULL; | |
123995b9 BZ |
1377 | } else { |
1378 | if ((i & 1) && mate) { | |
1379 | hwif->mate = mate; | |
1380 | mate->mate = hwif; | |
1381 | } | |
9fd91d95 | 1382 | |
123995b9 | 1383 | mate = (i & 1) ? NULL : hwif; |
c413b9b9 | 1384 | |
123995b9 BZ |
1385 | ide_init_port(hwif, i & 1, d); |
1386 | ide_port_cable_detect(hwif); | |
1387 | } | |
c413b9b9 | 1388 | |
7704ca2a | 1389 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1390 | } |
1391 | ||
2bd24a1c | 1392 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1393 | if (hwif == NULL) |
1394 | continue; | |
139ddfca | 1395 | |
eb716beb BZ |
1396 | if (ide_probe_port(hwif) == 0) |
1397 | hwif->present = 1; | |
a14dc574 BZ |
1398 | |
1399 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
9a100f4b BZ |
1400 | !hwif->mate->present) { |
1401 | if (ide_register_port(hwif)) { | |
1402 | ide_disable_port(hwif); | |
1403 | continue; | |
1404 | } | |
1405 | } | |
a14dc574 | 1406 | |
eb716beb BZ |
1407 | if (hwif->present) |
1408 | ide_port_tune_devices(hwif); | |
2e13093a | 1409 | } |
ba6560aa | 1410 | |
2bd24a1c | 1411 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1412 | if (hwif == NULL) |
1413 | continue; | |
ba6560aa BZ |
1414 | |
1415 | if (hwif_init(hwif) == 0) { | |
1416 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1417 | "interface\n", hwif->name); | |
51d6ac70 IC |
1418 | device_unregister(&hwif->gendev); |
1419 | ide_disable_port(hwif); | |
ba6560aa BZ |
1420 | continue; |
1421 | } | |
decdc3f0 | 1422 | |
eb716beb | 1423 | if (hwif->present) |
e415e495 EO |
1424 | if (ide_port_setup_devices(hwif) == 0) { |
1425 | hwif->present = 0; | |
1426 | continue; | |
1427 | } | |
1428 | ||
1429 | j++; | |
26042d05 | 1430 | |
8b803bd1 | 1431 | ide_acpi_init_port(hwif); |
eb716beb BZ |
1432 | |
1433 | if (hwif->present) | |
1434 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1435 | } |
1436 | ||
2bd24a1c | 1437 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1438 | if (hwif == NULL) |
1439 | continue; | |
ba6560aa | 1440 | |
eb716beb | 1441 | if (hwif->present) |
ba6560aa | 1442 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1443 | } |
1444 | ||
2bd24a1c | 1445 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1446 | if (hwif == NULL) |
1447 | continue; | |
327617e1 | 1448 | |
eb716beb BZ |
1449 | ide_sysfs_register_port(hwif); |
1450 | ide_proc_register_port(hwif); | |
1451 | ||
1452 | if (hwif->present) | |
d9270a3f | 1453 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1454 | } |
1455 | ||
e0d00207 | 1456 | return j ? 0 : -1; |
8447d9d5 | 1457 | } |
48c3c107 | 1458 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1459 | |
6f904d01 BZ |
1460 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1461 | struct ide_host **hostp) | |
1462 | { | |
1463 | struct ide_host *host; | |
8a69580e | 1464 | int rc; |
6f904d01 BZ |
1465 | |
1466 | host = ide_host_alloc(d, hws); | |
1467 | if (host == NULL) | |
1468 | return -ENOMEM; | |
1469 | ||
8a69580e BZ |
1470 | rc = ide_host_register(host, d, hws); |
1471 | if (rc) { | |
1472 | ide_host_free(host); | |
1473 | return rc; | |
1474 | } | |
6f904d01 BZ |
1475 | |
1476 | if (hostp) | |
1477 | *hostp = host; | |
1478 | ||
1479 | return 0; | |
1480 | } | |
1481 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1482 | ||
b40d1b88 BZ |
1483 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
1484 | { | |
2bd24a1c | 1485 | ide_drive_t *drive; |
b40d1b88 BZ |
1486 | int i; |
1487 | ||
7ed5b157 BZ |
1488 | ide_port_for_each_present_dev(i, drive, hwif) { |
1489 | device_unregister(&drive->gendev); | |
1490 | wait_for_completion(&drive->gendev_rel_comp); | |
b40d1b88 BZ |
1491 | } |
1492 | } | |
1493 | ||
1494 | void ide_port_unregister_devices(ide_hwif_t *hwif) | |
1495 | { | |
1496 | mutex_lock(&ide_cfg_mtx); | |
1497 | __ide_port_unregister_devices(hwif); | |
1498 | hwif->present = 0; | |
1499 | ide_port_init_devices_data(hwif); | |
1500 | mutex_unlock(&ide_cfg_mtx); | |
1501 | } | |
1502 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
1503 | ||
1504 | /** | |
1505 | * ide_unregister - free an IDE interface | |
1506 | * @hwif: IDE interface | |
1507 | * | |
1508 | * Perform the final unregister of an IDE interface. | |
1509 | * | |
1510 | * Locking: | |
1511 | * The caller must not hold the IDE locks. | |
1512 | * | |
1513 | * It is up to the caller to be sure there is no pending I/O here, | |
1514 | * and that the interface will not be reopened (present/vanishing | |
1515 | * locking isn't yet done BTW). | |
1516 | */ | |
1517 | ||
1518 | static void ide_unregister(ide_hwif_t *hwif) | |
1519 | { | |
1520 | BUG_ON(in_interrupt()); | |
1521 | BUG_ON(irqs_disabled()); | |
1522 | ||
1523 | mutex_lock(&ide_cfg_mtx); | |
1524 | ||
1525 | if (hwif->present) { | |
1526 | __ide_port_unregister_devices(hwif); | |
1527 | hwif->present = 0; | |
1528 | } | |
1529 | ||
1530 | ide_proc_unregister_port(hwif); | |
1531 | ||
1532 | free_irq(hwif->irq, hwif); | |
1533 | ||
1534 | device_unregister(hwif->portdev); | |
1535 | device_unregister(&hwif->gendev); | |
1536 | wait_for_completion(&hwif->gendev_rel_comp); | |
1537 | ||
1538 | /* | |
1539 | * Remove us from the kernel's knowledge | |
1540 | */ | |
1541 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
1542 | kfree(hwif->sg_table); | |
1543 | unregister_blkdev(hwif->major, hwif->name); | |
1544 | ||
1545 | ide_release_dma_engine(hwif); | |
1546 | ||
1547 | mutex_unlock(&ide_cfg_mtx); | |
1548 | } | |
1549 | ||
8a69580e | 1550 | void ide_host_free(struct ide_host *host) |
151575e4 | 1551 | { |
8cdf3100 | 1552 | ide_hwif_t *hwif; |
151575e4 | 1553 | int i; |
8447d9d5 | 1554 | |
2bd24a1c | 1555 | ide_host_for_each_port(i, hwif, host) { |
9a100f4b BZ |
1556 | if (hwif) |
1557 | ide_port_free(hwif); | |
c97c6aca | 1558 | } |
151575e4 | 1559 | |
48c3c107 | 1560 | kfree(host); |
151575e4 | 1561 | } |
8a69580e BZ |
1562 | EXPORT_SYMBOL_GPL(ide_host_free); |
1563 | ||
1564 | void ide_host_remove(struct ide_host *host) | |
1565 | { | |
2bd24a1c | 1566 | ide_hwif_t *hwif; |
8a69580e BZ |
1567 | int i; |
1568 | ||
2bd24a1c BZ |
1569 | ide_host_for_each_port(i, hwif, host) { |
1570 | if (hwif) | |
1571 | ide_unregister(hwif); | |
8a69580e BZ |
1572 | } |
1573 | ||
1574 | ide_host_free(host); | |
1575 | } | |
48c3c107 | 1576 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1577 | |
1578 | void ide_port_scan(ide_hwif_t *hwif) | |
1579 | { | |
9fd91d95 | 1580 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1581 | ide_port_cable_detect(hwif); |
1582 | ide_port_init_devices(hwif); | |
1583 | ||
1584 | if (ide_probe_port(hwif) < 0) | |
1585 | return; | |
1586 | ||
1587 | hwif->present = 1; | |
1588 | ||
1589 | ide_port_tune_devices(hwif); | |
2dde7861 | 1590 | ide_port_setup_devices(hwif); |
e630fcbe | 1591 | ide_acpi_port_init_devices(hwif); |
2dde7861 BZ |
1592 | hwif_register_devices(hwif); |
1593 | ide_proc_port_register_devices(hwif); | |
1594 | } | |
1595 | EXPORT_SYMBOL_GPL(ide_port_scan); |