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 | |
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")) |
69197ad7 BZ |
231 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
232 | else | |
233 | drive->dev_flags |= IDE_DFLAG_PRESENT; | |
1da177e4 LT |
234 | } |
235 | ||
236 | /** | |
2ebe1d9e | 237 | * ide_dev_read_id - send ATA/ATAPI IDENTIFY command |
1da177e4 LT |
238 | * @drive: drive to identify |
239 | * @cmd: command to use | |
2ebe1d9e | 240 | * @id: buffer for IDENTIFY data |
1da177e4 | 241 | * |
2ebe1d9e | 242 | * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response. |
1da177e4 LT |
243 | * |
244 | * Returns: 0 device was identified | |
245 | * 1 device timed-out (no response to identify request) | |
246 | * 2 device aborted the command (refused to identify itself) | |
247 | */ | |
248 | ||
2ebe1d9e | 249 | int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id) |
1da177e4 | 250 | { |
898ec223 | 251 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 | 252 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 253 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 254 | int use_altstatus = 0, rc; |
1da177e4 LT |
255 | unsigned long timeout; |
256 | u8 s = 0, a = 0; | |
257 | ||
a182807a BZ |
258 | /* |
259 | * Disable device IRQ. Otherwise we'll get spurious interrupts | |
260 | * during the identify phase that the IRQ handler isn't expecting. | |
261 | */ | |
262 | if (io_ports->ctl_addr) | |
263 | tp_ops->set_irq(hwif, 0); | |
264 | ||
1da177e4 LT |
265 | /* take a deep breath */ |
266 | msleep(50); | |
267 | ||
6636487e BZ |
268 | if (io_ports->ctl_addr && |
269 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { | |
374e042c BZ |
270 | a = tp_ops->read_altstatus(hwif); |
271 | s = tp_ops->read_status(hwif); | |
3a7d2484 | 272 | if ((a ^ s) & ~ATA_IDX) |
1da177e4 | 273 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
274 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
275 | "instead of ALTSTATUS(0x%02x)\n", | |
276 | drive->name, s, a); | |
277 | else | |
1da177e4 | 278 | /* use non-intrusive polling */ |
c47137a9 BZ |
279 | use_altstatus = 1; |
280 | } | |
1da177e4 LT |
281 | |
282 | /* set features register for atapi | |
283 | * identify command to be sure of reply | |
284 | */ | |
aaaade3f | 285 | if (cmd == ATA_CMD_ID_ATAPI) { |
22aa4b32 | 286 | struct ide_cmd cmd; |
4e65837b | 287 | |
22aa4b32 | 288 | memset(&cmd, 0, sizeof(cmd)); |
4e65837b | 289 | /* disable DMA & overlap */ |
22aa4b32 | 290 | cmd.tf_flags = IDE_TFLAG_OUT_FEATURE; |
4e65837b | 291 | |
22aa4b32 | 292 | tp_ops->tf_load(drive, &cmd); |
4e65837b | 293 | } |
1da177e4 LT |
294 | |
295 | /* ask drive for ID */ | |
374e042c | 296 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 297 | |
aaaade3f | 298 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
b163f46d BZ |
299 | |
300 | if (ide_busy_sleep(hwif, timeout, use_altstatus)) | |
301 | return 1; | |
1da177e4 | 302 | |
3a7d2484 | 303 | /* wait for IRQ and ATA_DRQ */ |
1da177e4 | 304 | msleep(50); |
374e042c | 305 | s = tp_ops->read_status(hwif); |
c47137a9 | 306 | |
3a7d2484 | 307 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 | 308 | /* drive returned ID */ |
2ebe1d9e | 309 | do_identify(drive, cmd, id); |
1da177e4 LT |
310 | /* drive responded with ID */ |
311 | rc = 0; | |
312 | /* clear drive IRQ */ | |
374e042c | 313 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
314 | } else { |
315 | /* drive refused ID */ | |
316 | rc = 2; | |
317 | } | |
318 | return rc; | |
319 | } | |
320 | ||
b163f46d | 321 | int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) |
3a5015cc | 322 | { |
3a5015cc BZ |
323 | u8 stat; |
324 | ||
b163f46d BZ |
325 | timeout += jiffies; |
326 | ||
3a5015cc | 327 | do { |
b163f46d BZ |
328 | msleep(50); /* give drive a breather */ |
329 | stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) | |
330 | : hwif->tp_ops->read_status(hwif); | |
3a7d2484 | 331 | if ((stat & ATA_BUSY) == 0) |
3a5015cc BZ |
332 | return 0; |
333 | } while (time_before(jiffies, timeout)); | |
334 | ||
b163f46d | 335 | return 1; /* drive timed-out */ |
3a5015cc | 336 | } |
1da177e4 | 337 | |
1f2efb82 BZ |
338 | static u8 ide_read_device(ide_drive_t *drive) |
339 | { | |
22aa4b32 | 340 | struct ide_cmd cmd; |
1f2efb82 | 341 | |
22aa4b32 BZ |
342 | memset(&cmd, 0, sizeof(cmd)); |
343 | cmd.tf_flags = IDE_TFLAG_IN_DEVICE; | |
1f2efb82 | 344 | |
22aa4b32 | 345 | drive->hwif->tp_ops->tf_read(drive, &cmd); |
1f2efb82 | 346 | |
22aa4b32 | 347 | return cmd.tf.device; |
1f2efb82 BZ |
348 | } |
349 | ||
1da177e4 LT |
350 | /** |
351 | * do_probe - probe an IDE device | |
352 | * @drive: drive to probe | |
353 | * @cmd: command to use | |
354 | * | |
355 | * do_probe() has the difficult job of finding a drive if it exists, | |
356 | * without getting hung up if it doesn't exist, without trampling on | |
357 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
358 | * | |
359 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
360 | * but does not respond right away, the probe will "hang in there" | |
361 | * for the maximum wait time (about 30 seconds), otherwise it will | |
362 | * exit much more quickly. | |
363 | * | |
364 | * Returns: 0 device was identified | |
365 | * 1 device timed-out (no response to identify request) | |
366 | * 2 device aborted the command (refused to identify itself) | |
367 | * 3 bad status from device (possible for ATAPI drives) | |
368 | * 4 probe was not attempted because failure was obvious | |
369 | */ | |
370 | ||
371 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
372 | { | |
898ec223 | 373 | ide_hwif_t *hwif = drive->hwif; |
374e042c | 374 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
2ebe1d9e | 375 | u16 *id = drive->id; |
57b55275 | 376 | int rc; |
97100fc8 BZ |
377 | u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
378 | ||
379 | /* avoid waiting for inappropriate probes */ | |
380 | if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) | |
381 | return 4; | |
1da177e4 | 382 | |
1da177e4 | 383 | #ifdef DEBUG |
1b8ebad8 | 384 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
97100fc8 | 385 | drive->name, present, drive->media, |
aaaade3f | 386 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
387 | #endif |
388 | ||
389 | /* needed for some systems | |
390 | * (e.g. crw9624 as drive0 with disk as slave) | |
391 | */ | |
392 | msleep(50); | |
393 | SELECT_DRIVE(drive); | |
394 | msleep(50); | |
1f2efb82 | 395 | |
7f612f27 | 396 | if (ide_read_device(drive) != drive->select && present == 0) { |
123995b9 | 397 | if (drive->dn & 1) { |
1da177e4 | 398 | /* exit with drive0 selected */ |
5e7f3a46 | 399 | SELECT_DRIVE(hwif->devices[0]); |
3a7d2484 | 400 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
401 | msleep(50); |
402 | } | |
403 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
404 | return 3; | |
405 | } | |
406 | ||
374e042c | 407 | stat = tp_ops->read_status(hwif); |
c47137a9 | 408 | |
3a7d2484 | 409 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
97100fc8 | 410 | present || cmd == ATA_CMD_ID_ATAPI) { |
2ebe1d9e BZ |
411 | rc = ide_dev_read_id(drive, cmd, id); |
412 | if (rc) | |
1da177e4 | 413 | /* failed: try again */ |
2ebe1d9e | 414 | rc = ide_dev_read_id(drive, cmd, id); |
57b55275 | 415 | |
374e042c | 416 | stat = tp_ops->read_status(hwif); |
57b55275 | 417 | |
3a7d2484 | 418 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
419 | return 4; |
420 | ||
aaaade3f | 421 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
422 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
423 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 424 | msleep(50); |
e81a3bde | 425 | SELECT_DRIVE(drive); |
1da177e4 | 426 | msleep(50); |
aaaade3f | 427 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
b163f46d | 428 | (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); |
2ebe1d9e | 429 | rc = ide_dev_read_id(drive, cmd, id); |
1da177e4 | 430 | } |
57b55275 BZ |
431 | |
432 | /* ensure drive IRQ is clear */ | |
374e042c | 433 | stat = tp_ops->read_status(hwif); |
57b55275 | 434 | |
1da177e4 | 435 | if (rc == 1) |
57b55275 BZ |
436 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
437 | drive->name, stat); | |
1da177e4 LT |
438 | } else { |
439 | /* not present or maybe ATAPI */ | |
440 | rc = 3; | |
441 | } | |
123995b9 | 442 | if (drive->dn & 1) { |
1da177e4 | 443 | /* exit with drive0 selected */ |
5e7f3a46 | 444 | SELECT_DRIVE(hwif->devices[0]); |
1da177e4 LT |
445 | msleep(50); |
446 | /* ensure drive irq is clear */ | |
374e042c | 447 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
448 | } |
449 | return rc; | |
450 | } | |
451 | ||
1da177e4 LT |
452 | /** |
453 | * probe_for_drives - upper level drive probe | |
454 | * @drive: drive to probe for | |
455 | * | |
456 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
457 | * and presents things to the user as needed. | |
458 | * | |
459 | * Returns: 0 no device was found | |
97100fc8 BZ |
460 | * 1 device was found |
461 | * (note: IDE_DFLAG_PRESENT might still be not set) | |
1da177e4 | 462 | */ |
047140ae BZ |
463 | |
464 | static u8 probe_for_drive(ide_drive_t *drive) | |
1da177e4 | 465 | { |
4dde4492 | 466 | char *m; |
1bd4c1f4 BZ |
467 | int rc; |
468 | u8 cmd; | |
4dde4492 | 469 | |
1da177e4 LT |
470 | /* |
471 | * In order to keep things simple we have an id | |
472 | * block for all drives at all times. If the device | |
473 | * is pre ATA or refuses ATA/ATAPI identify we | |
474 | * will add faked data to this. | |
475 | * | |
476 | * Also note that 0 everywhere means "can't do X" | |
477 | */ | |
478 | ||
97100fc8 BZ |
479 | drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
480 | ||
151a6701 | 481 | drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); |
97100fc8 | 482 | if (drive->id == NULL) { |
1da177e4 LT |
483 | printk(KERN_ERR "ide: out of memory for id data.\n"); |
484 | return 0; | |
485 | } | |
4dde4492 BZ |
486 | |
487 | m = (char *)&drive->id[ATA_ID_PROD]; | |
488 | strcpy(m, "UNKNOWN"); | |
489 | ||
1da177e4 | 490 | /* skip probing? */ |
97100fc8 | 491 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
1da177e4 | 492 | /* if !(success||timed-out) */ |
1bd4c1f4 BZ |
493 | cmd = ATA_CMD_ID_ATA; |
494 | rc = do_probe(drive, cmd); | |
495 | if (rc >= 2) { | |
1da177e4 | 496 | /* look for ATAPI device */ |
1bd4c1f4 BZ |
497 | cmd = ATA_CMD_ID_ATAPI; |
498 | rc = do_probe(drive, cmd); | |
499 | } | |
c36a7e98 | 500 | |
97100fc8 | 501 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
69197ad7 | 502 | goto out_free; |
4dde4492 | 503 | |
1da177e4 | 504 | /* identification failed? */ |
97100fc8 | 505 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
506 | if (drive->media == ide_disk) { |
507 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
508 | drive->name, drive->cyl, | |
509 | drive->head, drive->sect); | |
510 | } else if (drive->media == ide_cdrom) { | |
511 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
512 | } else { | |
513 | /* nuke it */ | |
514 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
97100fc8 | 515 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 | 516 | } |
1bd4c1f4 BZ |
517 | } else { |
518 | if (cmd == ATA_CMD_ID_ATAPI) | |
519 | ide_classify_atapi_dev(drive); | |
520 | else | |
521 | ide_classify_ata_dev(drive); | |
1da177e4 | 522 | } |
1da177e4 | 523 | } |
97100fc8 BZ |
524 | |
525 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
69197ad7 | 526 | goto out_free; |
97100fc8 | 527 | |
1da177e4 | 528 | /* The drive wasn't being helpful. Add generic info only */ |
97100fc8 | 529 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
530 | generic_id(drive); |
531 | return 1; | |
532 | } | |
533 | ||
534 | if (drive->media == ide_disk) { | |
535 | ide_disk_init_chs(drive); | |
536 | ide_disk_init_mult_count(drive); | |
537 | } | |
538 | ||
69197ad7 BZ |
539 | return 1; |
540 | out_free: | |
541 | kfree(drive->id); | |
542 | return 0; | |
1da177e4 LT |
543 | } |
544 | ||
fc410698 | 545 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
546 | { |
547 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
548 | ||
f36d4024 | 549 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
550 | } |
551 | ||
f74c9141 | 552 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 553 | { |
349ae23f RD |
554 | int ret; |
555 | ||
1da177e4 | 556 | /* register with global device tree */ |
dc09c784 | 557 | dev_set_name(&hwif->gendev, hwif->name); |
1da177e4 | 558 | hwif->gendev.driver_data = hwif; |
bb54affa AS |
559 | if (hwif->gendev.parent == NULL) |
560 | hwif->gendev.parent = hwif->dev; | |
1da177e4 | 561 | hwif->gendev.release = hwif_release_dev; |
96d40941 | 562 | |
349ae23f | 563 | ret = device_register(&hwif->gendev); |
f74c9141 | 564 | if (ret < 0) { |
349ae23f | 565 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 566 | __func__, ret); |
f74c9141 BZ |
567 | goto out; |
568 | } | |
569 | ||
3ee074bf GKH |
570 | hwif->portdev = device_create(ide_port_class, &hwif->gendev, |
571 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
572 | if (IS_ERR(hwif->portdev)) { |
573 | ret = PTR_ERR(hwif->portdev); | |
574 | device_unregister(&hwif->gendev); | |
575 | } | |
f74c9141 BZ |
576 | out: |
577 | return ret; | |
1da177e4 LT |
578 | } |
579 | ||
c860a8f2 BZ |
580 | /** |
581 | * ide_port_wait_ready - wait for port to become ready | |
582 | * @hwif: IDE port | |
583 | * | |
584 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
585 | * platforms. Typical cases are: | |
586 | * | |
587 | * - The firmware hard reset the disk before booting the kernel, | |
588 | * the drive is still doing it's poweron-reset sequence, that | |
589 | * can take up to 30 seconds. | |
590 | * | |
591 | * - The firmware does nothing (or no firmware), the device is | |
592 | * still in POST state (same as above actually). | |
593 | * | |
594 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
595 | * their reset sequence even when they are non-selected slave | |
596 | * devices, thus preventing discovery of the main HD. | |
597 | * | |
598 | * Doing this wait-for-non-busy should not harm any existing | |
599 | * configuration and fix some issues like the above. | |
600 | * | |
601 | * BenH. | |
602 | * | |
603 | * Returns 0 on success, error code (< 0) otherwise. | |
604 | */ | |
605 | ||
606 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 607 | { |
2bd24a1c BZ |
608 | ide_drive_t *drive; |
609 | int i, rc; | |
1da177e4 LT |
610 | |
611 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
612 | ||
613 | /* Let HW settle down a bit from whatever init state we | |
614 | * come from */ | |
615 | mdelay(2); | |
616 | ||
617 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
618 | * I know of at least one disk who takes 31 seconds, I use 35 | |
619 | * here to be safe | |
620 | */ | |
621 | rc = ide_wait_not_busy(hwif, 35000); | |
622 | if (rc) | |
623 | return rc; | |
624 | ||
625 | /* Now make sure both master & slave are ready */ | |
2bd24a1c | 626 | ide_port_for_each_dev(i, drive, hwif) { |
8266105b | 627 | /* Ignore disks that we will not probe for later. */ |
97100fc8 BZ |
628 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
629 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
8266105b | 630 | SELECT_DRIVE(drive); |
374e042c | 631 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
632 | mdelay(2); |
633 | rc = ide_wait_not_busy(hwif, 35000); | |
634 | if (rc) | |
635 | goto out; | |
636 | } else | |
637 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
638 | drive->name); | |
639 | } | |
640 | out: | |
1da177e4 | 641 | /* Exit function with master reselected (let's be sane) */ |
2bd24a1c | 642 | if (i) |
5e7f3a46 | 643 | SELECT_DRIVE(hwif->devices[0]); |
8266105b | 644 | |
1da177e4 LT |
645 | return rc; |
646 | } | |
647 | ||
648 | /** | |
649 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 650 | * @dev1: slave device |
1da177e4 LT |
651 | * |
652 | * Analyse the drives on the interface and attempt to decide if we | |
653 | * have the same drive viewed twice. This occurs with crap CF adapters | |
654 | * and PCMCIA sometimes. | |
655 | */ | |
656 | ||
4dde4492 | 657 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 658 | { |
5e7f3a46 | 659 | ide_drive_t *dev0 = dev1->hwif->devices[0]; |
1da177e4 | 660 | |
97100fc8 | 661 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
662 | return; |
663 | ||
664 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
665 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
666 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
667 | return; |
668 | ||
669 | /* Serial numbers do not match */ | |
4dde4492 BZ |
670 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
671 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
672 | return; |
673 | ||
674 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 675 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
676 | return; |
677 | ||
678 | /* Appears to be an IDE flash adapter with decode bugs */ | |
679 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
680 | ||
97100fc8 | 681 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
682 | } |
683 | ||
684 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
685 | ||
9d501529 | 686 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 687 | { |
2bd24a1c | 688 | ide_drive_t *drive; |
1da177e4 | 689 | unsigned int irqd; |
2bd24a1c | 690 | int i, rc = -ENODEV; |
a14dc574 BZ |
691 | |
692 | BUG_ON(hwif->present); | |
1da177e4 | 693 | |
5e7f3a46 BZ |
694 | if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && |
695 | (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 696 | return -EACCES; |
1da177e4 | 697 | |
1da177e4 LT |
698 | /* |
699 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
700 | * we'll install our IRQ driver much later... | |
701 | */ | |
702 | irqd = hwif->irq; | |
703 | if (irqd) | |
704 | disable_irq(hwif->irq); | |
705 | ||
c860a8f2 | 706 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
707 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
708 | ||
709 | /* | |
f367bed0 BZ |
710 | * Second drive should only exist if first drive was found, |
711 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 712 | */ |
2bd24a1c | 713 | ide_port_for_each_dev(i, drive, hwif) { |
1da177e4 | 714 | (void) probe_for_drive(drive); |
97100fc8 | 715 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 716 | rc = 0; |
1da177e4 | 717 | } |
e460a597 | 718 | |
1da177e4 LT |
719 | /* |
720 | * Use cached IRQ number. It might be (and is...) changed by probe | |
721 | * code above | |
722 | */ | |
723 | if (irqd) | |
724 | enable_irq(irqd); | |
725 | ||
a14dc574 | 726 | return rc; |
e84e7ea7 BZ |
727 | } |
728 | ||
729 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
730 | { | |
ac95beed | 731 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c BZ |
732 | ide_drive_t *drive; |
733 | int i; | |
f01393e4 | 734 | |
7ed5b157 BZ |
735 | ide_port_for_each_present_dev(i, drive, hwif) { |
736 | if (port_ops && port_ops->quirkproc) | |
737 | port_ops->quirkproc(drive); | |
f01393e4 | 738 | } |
0380dad4 | 739 | |
7ed5b157 BZ |
740 | ide_port_for_each_present_dev(i, drive, hwif) { |
741 | ide_set_max_pio(drive); | |
1da177e4 | 742 | |
7ed5b157 | 743 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 744 | |
7ed5b157 BZ |
745 | if (hwif->dma_ops) |
746 | ide_set_dma(drive); | |
1da177e4 LT |
747 | } |
748 | } | |
749 | ||
1da177e4 LT |
750 | /* |
751 | * init request queue | |
752 | */ | |
753 | static int ide_init_queue(ide_drive_t *drive) | |
754 | { | |
165125e1 | 755 | struct request_queue *q; |
898ec223 | 756 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
757 | int max_sectors = 256; |
758 | int max_sg_entries = PRD_ENTRIES; | |
759 | ||
760 | /* | |
761 | * Our default set up assumes the normal IDE case, | |
762 | * that is 64K segmenting, standard PRD setup | |
763 | * and LBA28. Some drivers then impose their own | |
764 | * limits and LBA48 we could raise it but as yet | |
765 | * do not. | |
766 | */ | |
1946089a | 767 | |
201bffa4 | 768 | q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); |
1da177e4 LT |
769 | if (!q) |
770 | return 1; | |
771 | ||
772 | q->queuedata = drive; | |
773 | blk_queue_segment_boundary(q, 0xffff); | |
774 | ||
1da177e4 LT |
775 | if (hwif->rqsize < max_sectors) |
776 | max_sectors = hwif->rqsize; | |
777 | blk_queue_max_sectors(q, max_sectors); | |
778 | ||
779 | #ifdef CONFIG_PCI | |
780 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
781 | * creates segments that don't completely match our boundary | |
782 | * requirements and thus need to be broken up again. Because it | |
783 | * doesn't align properly either, we may actually have to break up | |
784 | * to more segments than what was we got in the first place, a max | |
785 | * worst case is twice as many. | |
786 | * This will be fixed once we teach pci_map_sg() about our boundary | |
787 | * requirements, hopefully soon. *FIXME* | |
788 | */ | |
789 | if (!PCI_DMA_BUS_IS_PHYS) | |
790 | max_sg_entries >>= 1; | |
791 | #endif /* CONFIG_PCI */ | |
792 | ||
793 | blk_queue_max_hw_segments(q, max_sg_entries); | |
794 | blk_queue_max_phys_segments(q, max_sg_entries); | |
795 | ||
796 | /* assign drive queue */ | |
797 | drive->queue = q; | |
798 | ||
799 | /* needs drive->queue to be set */ | |
800 | ide_toggle_bounce(drive, 1); | |
801 | ||
1da177e4 LT |
802 | return 0; |
803 | } | |
804 | ||
b40d1b88 BZ |
805 | static DEFINE_MUTEX(ide_cfg_mtx); |
806 | ||
d5bc6592 BZ |
807 | /* |
808 | * For any present drive: | |
809 | * - allocate the block device queue | |
d5bc6592 | 810 | */ |
e415e495 | 811 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 812 | { |
2bd24a1c | 813 | ide_drive_t *drive; |
e415e495 | 814 | int i, j = 0; |
d5bc6592 | 815 | |
26042d05 | 816 | mutex_lock(&ide_cfg_mtx); |
7ed5b157 | 817 | ide_port_for_each_present_dev(i, drive, hwif) { |
d5bc6592 BZ |
818 | if (ide_init_queue(drive)) { |
819 | printk(KERN_ERR "ide: failed to init %s\n", | |
820 | drive->name); | |
e415e495 EO |
821 | kfree(drive->id); |
822 | drive->id = NULL; | |
823 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; | |
d5bc6592 BZ |
824 | continue; |
825 | } | |
826 | ||
e415e495 | 827 | j++; |
d5bc6592 | 828 | } |
26042d05 | 829 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
830 | |
831 | return j; | |
d5bc6592 BZ |
832 | } |
833 | ||
1da177e4 | 834 | /* |
b65fac32 | 835 | * This routine sets up the IRQ for an IDE interface. |
1da177e4 LT |
836 | */ |
837 | static int init_irq (ide_hwif_t *hwif) | |
838 | { | |
4c3032d8 | 839 | struct ide_io_ports *io_ports = &hwif->io_ports; |
255115fb BZ |
840 | struct ide_host *host = hwif->host; |
841 | irq_handler_t irq_handler = host->irq_handler; | |
842 | int sa = host->irq_flags; | |
1da177e4 | 843 | |
849d7130 SG |
844 | if (irq_handler == NULL) |
845 | irq_handler = ide_intr; | |
846 | ||
ae86afae BZ |
847 | if (io_ports->ctl_addr) |
848 | hwif->tp_ops->set_irq(hwif, 1); | |
1da177e4 | 849 | |
849d7130 | 850 | if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) |
b65fac32 | 851 | goto out_up; |
1da177e4 | 852 | |
7b892806 | 853 | #if !defined(__mc68000__) |
1b8ebad8 | 854 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
855 | io_ports->data_addr, io_ports->status_addr, |
856 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 857 | #else |
1b8ebad8 | 858 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 859 | io_ports->data_addr, hwif->irq); |
7b892806 | 860 | #endif /* __mc68000__ */ |
b65fac32 BZ |
861 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) |
862 | printk(KERN_CONT " (serialized)"); | |
1b8ebad8 | 863 | printk(KERN_CONT "\n"); |
d5bc6592 | 864 | |
1da177e4 | 865 | return 0; |
1da177e4 | 866 | out_up: |
1da177e4 LT |
867 | return 1; |
868 | } | |
869 | ||
870 | static int ata_lock(dev_t dev, void *data) | |
871 | { | |
872 | /* FIXME: we want to pin hwif down */ | |
873 | return 0; | |
874 | } | |
875 | ||
876 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
877 | { | |
878 | ide_hwif_t *hwif = data; | |
879 | int unit = *part >> PARTN_BITS; | |
5e7f3a46 | 880 | ide_drive_t *drive = hwif->devices[unit]; |
97100fc8 BZ |
881 | |
882 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
883 | return NULL; |
884 | ||
885 | if (drive->media == ide_disk) | |
886 | request_module("ide-disk"); | |
1da177e4 LT |
887 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
888 | request_module("ide-cd"); | |
889 | if (drive->media == ide_tape) | |
890 | request_module("ide-tape"); | |
891 | if (drive->media == ide_floppy) | |
892 | request_module("ide-floppy"); | |
893 | ||
894 | return NULL; | |
895 | } | |
896 | ||
897 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
898 | { | |
899 | struct gendisk *p = data; | |
900 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 901 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
902 | } |
903 | ||
904 | static int exact_lock(dev_t dev, void *data) | |
905 | { | |
906 | struct gendisk *p = data; | |
907 | ||
908 | if (!get_disk(p)) | |
909 | return -1; | |
910 | return 0; | |
911 | } | |
912 | ||
913 | void ide_register_region(struct gendisk *disk) | |
914 | { | |
915 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
916 | disk->minors, NULL, exact_match, exact_lock, disk); | |
917 | } | |
918 | ||
919 | EXPORT_SYMBOL_GPL(ide_register_region); | |
920 | ||
921 | void ide_unregister_region(struct gendisk *disk) | |
922 | { | |
923 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
924 | disk->minors); | |
925 | } | |
926 | ||
927 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
928 | ||
929 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
930 | { | |
931 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 932 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
933 | |
934 | disk->major = hwif->major; | |
935 | disk->first_minor = unit << PARTN_BITS; | |
936 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
937 | disk->queue = drive->queue; | |
938 | } | |
939 | ||
940 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
941 | ||
942 | static void drive_release_dev (struct device *dev) | |
943 | { | |
944 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
b65fac32 | 945 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 946 | |
5b0c4b30 BZ |
947 | ide_proc_unregister_device(drive); |
948 | ||
b65fac32 | 949 | spin_lock_irq(&hwif->lock); |
6044ec88 JJ |
950 | kfree(drive->id); |
951 | drive->id = NULL; | |
97100fc8 | 952 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 953 | /* Messed up locking ... */ |
b65fac32 | 954 | spin_unlock_irq(&hwif->lock); |
8604affd | 955 | blk_cleanup_queue(drive->queue); |
b65fac32 | 956 | spin_lock_irq(&hwif->lock); |
8604affd | 957 | drive->queue = NULL; |
b65fac32 | 958 | spin_unlock_irq(&hwif->lock); |
8604affd | 959 | |
f36d4024 | 960 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
961 | } |
962 | ||
1da177e4 LT |
963 | static int hwif_init(ide_hwif_t *hwif) |
964 | { | |
1da177e4 | 965 | if (!hwif->irq) { |
8b07ed26 BZ |
966 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
967 | return 0; | |
1da177e4 | 968 | } |
1da177e4 | 969 | |
1da177e4 LT |
970 | if (register_blkdev(hwif->major, hwif->name)) |
971 | return 0; | |
972 | ||
973 | if (!hwif->sg_max_nents) | |
974 | hwif->sg_max_nents = PRD_ENTRIES; | |
975 | ||
45711f1a | 976 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
977 | GFP_KERNEL); |
978 | if (!hwif->sg_table) { | |
979 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
980 | goto out; | |
981 | } | |
45711f1a JA |
982 | |
983 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 | 984 | |
1da177e4 | 985 | if (init_irq(hwif)) { |
8b07ed26 BZ |
986 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
987 | hwif->name, hwif->irq); | |
1da177e4 LT |
988 | goto out; |
989 | } | |
1da177e4 | 990 | |
3a4e7c96 BZ |
991 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
992 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
993 | return 1; |
994 | ||
995 | out: | |
996 | unregister_blkdev(hwif->major, hwif->name); | |
997 | return 0; | |
998 | } | |
999 | ||
9601a607 BZ |
1000 | static void hwif_register_devices(ide_hwif_t *hwif) |
1001 | { | |
2bd24a1c | 1002 | ide_drive_t *drive; |
9601a607 BZ |
1003 | unsigned int i; |
1004 | ||
7ed5b157 | 1005 | ide_port_for_each_present_dev(i, drive, hwif) { |
c5d70cc7 BZ |
1006 | struct device *dev = &drive->gendev; |
1007 | int ret; | |
9601a607 | 1008 | |
dc09c784 | 1009 | dev_set_name(dev, "%u.%u", hwif->index, i); |
c5d70cc7 BZ |
1010 | dev->parent = &hwif->gendev; |
1011 | dev->bus = &ide_bus_type; | |
1012 | dev->driver_data = drive; | |
1013 | dev->release = drive_release_dev; | |
1014 | ||
1015 | ret = device_register(dev); | |
1016 | if (ret < 0) | |
1017 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1018 | "%d\n", __func__, ret); | |
9601a607 BZ |
1019 | } |
1020 | } | |
1021 | ||
7704ca2a BZ |
1022 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1023 | { | |
ac95beed | 1024 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c | 1025 | ide_drive_t *drive; |
7704ca2a BZ |
1026 | int i; |
1027 | ||
2bd24a1c | 1028 | ide_port_for_each_dev(i, drive, hwif) { |
123995b9 BZ |
1029 | drive->dn = i + hwif->channel * 2; |
1030 | ||
7704ca2a BZ |
1031 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1032 | drive->io_32bit = 1; | |
7610c4f5 BZ |
1033 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
1034 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
7704ca2a | 1035 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) |
97100fc8 | 1036 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1037 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1038 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1039 | |
e6d95bd1 BZ |
1040 | if (port_ops && port_ops->init_dev) |
1041 | port_ops->init_dev(drive); | |
1042 | } | |
7704ca2a BZ |
1043 | } |
1044 | ||
c413b9b9 BZ |
1045 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1046 | const struct ide_port_info *d) | |
8447d9d5 | 1047 | { |
b7691646 | 1048 | hwif->channel = port; |
c413b9b9 BZ |
1049 | |
1050 | if (d->chipset) | |
1051 | hwif->chipset = d->chipset; | |
1052 | ||
1053 | if (d->init_iops) | |
1054 | d->init_iops(hwif); | |
1055 | ||
23f8e4bf BZ |
1056 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1057 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1058 | hwif->pio_mask = d->pio_mask; |
1059 | ||
374e042c BZ |
1060 | if (d->tp_ops) |
1061 | hwif->tp_ops = d->tp_ops; | |
1062 | ||
ac95beed | 1063 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
2787cb8a | 1064 | if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) |
ac95beed BZ |
1065 | hwif->port_ops = d->port_ops; |
1066 | ||
c413b9b9 BZ |
1067 | hwif->swdma_mask = d->swdma_mask; |
1068 | hwif->mwdma_mask = d->mwdma_mask; | |
1069 | hwif->ultra_mask = d->udma_mask; | |
1070 | ||
b123f56e BZ |
1071 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1072 | int rc; | |
1073 | ||
592b5315 SS |
1074 | hwif->dma_ops = d->dma_ops; |
1075 | ||
b123f56e BZ |
1076 | if (d->init_dma) |
1077 | rc = d->init_dma(hwif, d); | |
1078 | else | |
1079 | rc = ide_hwif_setup_dma(hwif, d); | |
1080 | ||
1081 | if (rc < 0) { | |
1082 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
592b5315 SS |
1083 | |
1084 | hwif->dma_ops = NULL; | |
ebb00fb5 | 1085 | hwif->dma_base = 0; |
b123f56e BZ |
1086 | hwif->swdma_mask = 0; |
1087 | hwif->mwdma_mask = 0; | |
1088 | hwif->ultra_mask = 0; | |
592b5315 | 1089 | } |
b123f56e | 1090 | } |
c413b9b9 | 1091 | |
1024c5f4 | 1092 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
702c026b BZ |
1093 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1094 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; | |
1024c5f4 | 1095 | |
6b492496 BZ |
1096 | if (d->max_sectors) |
1097 | hwif->rqsize = d->max_sectors; | |
70775e9c BZ |
1098 | else { |
1099 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1100 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1101 | hwif->rqsize = 256; | |
1102 | else | |
1103 | hwif->rqsize = 65536; | |
1104 | } | |
c413b9b9 BZ |
1105 | |
1106 | /* call chipset specific routine for each enabled port */ | |
1107 | if (d->init_hwif) | |
1108 | d->init_hwif(hwif); | |
c7f6f21a | 1109 | } |
bfa14b42 | 1110 | |
c7f6f21a BZ |
1111 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1112 | { | |
ac95beed BZ |
1113 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1114 | ||
1115 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1116 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1117 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1118 | } |
c413b9b9 BZ |
1119 | } |
1120 | ||
b40d1b88 BZ |
1121 | static const u8 ide_hwif_to_major[] = |
1122 | { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, | |
1123 | IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; | |
1124 | ||
1125 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
1126 | { | |
2bd24a1c BZ |
1127 | ide_drive_t *drive; |
1128 | int i; | |
b40d1b88 | 1129 | |
2bd24a1c BZ |
1130 | ide_port_for_each_dev(i, drive, hwif) { |
1131 | u8 j = (hwif->index * MAX_DRIVES) + i; | |
b40d1b88 BZ |
1132 | |
1133 | memset(drive, 0, sizeof(*drive)); | |
1134 | ||
1135 | drive->media = ide_disk; | |
2bd24a1c | 1136 | drive->select = (i << 4) | ATA_DEVICE_OBS; |
b40d1b88 BZ |
1137 | drive->hwif = hwif; |
1138 | drive->ready_stat = ATA_DRDY; | |
1139 | drive->bad_wstat = BAD_W_STAT; | |
1140 | drive->special.b.recalibrate = 1; | |
1141 | drive->special.b.set_geometry = 1; | |
1142 | drive->name[0] = 'h'; | |
1143 | drive->name[1] = 'd'; | |
1144 | drive->name[2] = 'a' + j; | |
1145 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; | |
1146 | ||
1147 | INIT_LIST_HEAD(&drive->list); | |
1148 | init_completion(&drive->gendev_rel_comp); | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) | |
1153 | { | |
b40d1b88 BZ |
1154 | /* fill in any non-zero initial values */ |
1155 | hwif->index = index; | |
1156 | hwif->major = ide_hwif_to_major[index]; | |
1157 | ||
1158 | hwif->name[0] = 'i'; | |
1159 | hwif->name[1] = 'd'; | |
1160 | hwif->name[2] = 'e'; | |
1161 | hwif->name[3] = '0' + index; | |
1162 | ||
7362951b BZ |
1163 | spin_lock_init(&hwif->lock); |
1164 | ||
1165 | init_timer(&hwif->timer); | |
1166 | hwif->timer.function = &ide_timer_expiry; | |
1167 | hwif->timer.data = (unsigned long)hwif; | |
1168 | ||
b40d1b88 BZ |
1169 | init_completion(&hwif->gendev_rel_comp); |
1170 | ||
1171 | hwif->tp_ops = &default_tp_ops; | |
1172 | ||
1173 | ide_port_init_devices_data(hwif); | |
1174 | } | |
1175 | ||
1176 | static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) | |
1177 | { | |
1178 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); | |
1179 | hwif->irq = hw->irq; | |
1180 | hwif->chipset = hw->chipset; | |
1181 | hwif->dev = hw->dev; | |
1182 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
1183 | hwif->ack_intr = hw->ack_intr; | |
1184 | hwif->config_data = hw->config; | |
1185 | } | |
1186 | ||
8cdf3100 BZ |
1187 | static unsigned int ide_indexes; |
1188 | ||
fe80b937 | 1189 | /** |
8cdf3100 | 1190 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1191 | * @d: IDE port info |
1192 | * | |
8cdf3100 | 1193 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1194 | */ |
1195 | ||
8cdf3100 | 1196 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1197 | { |
8cdf3100 | 1198 | int idx = -ENOENT; |
fe80b937 | 1199 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1200 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1201 | |
1202 | /* | |
1203 | * Claim an unassigned slot. | |
1204 | * | |
1205 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1206 | * just in case there's another interface yet-to-be-scanned | |
1207 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1208 | * | |
1209 | * Unless there is a bootable card that does not use the standard | |
1210 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1211 | */ | |
8cdf3100 | 1212 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1213 | if (bootable) { |
1214 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1215 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1216 | } else { |
75d21fff BZ |
1217 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1218 | idx = ffz(ide_indexes | 3); | |
1219 | else if ((ide_indexes & 3) != 3) | |
1220 | idx = ffz(ide_indexes); | |
fe80b937 | 1221 | } |
8cdf3100 BZ |
1222 | if (idx >= 0) |
1223 | ide_indexes |= (1 << idx); | |
1224 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1225 | |
8cdf3100 BZ |
1226 | return idx; |
1227 | } | |
256c5f8e | 1228 | |
8cdf3100 BZ |
1229 | static void ide_free_port_slot(int idx) |
1230 | { | |
1231 | mutex_lock(&ide_cfg_mtx); | |
1232 | ide_indexes &= ~(1 << idx); | |
1233 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1234 | } |
fe80b937 | 1235 | |
5e7f3a46 BZ |
1236 | static void ide_port_free_devices(ide_hwif_t *hwif) |
1237 | { | |
2bd24a1c | 1238 | ide_drive_t *drive; |
5e7f3a46 BZ |
1239 | int i; |
1240 | ||
2bd24a1c BZ |
1241 | ide_port_for_each_dev(i, drive, hwif) |
1242 | kfree(drive); | |
5e7f3a46 BZ |
1243 | } |
1244 | ||
1245 | static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) | |
1246 | { | |
1247 | int i; | |
1248 | ||
1249 | for (i = 0; i < MAX_DRIVES; i++) { | |
1250 | ide_drive_t *drive; | |
1251 | ||
1252 | drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); | |
1253 | if (drive == NULL) | |
1254 | goto out_nomem; | |
1255 | ||
1256 | hwif->devices[i] = drive; | |
1257 | } | |
1258 | return 0; | |
1259 | ||
1260 | out_nomem: | |
1261 | ide_port_free_devices(hwif); | |
1262 | return -ENOMEM; | |
1263 | } | |
1264 | ||
a36223b0 | 1265 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
48c3c107 BZ |
1266 | { |
1267 | struct ide_host *host; | |
a32296f9 BZ |
1268 | struct device *dev = hws[0] ? hws[0]->dev : NULL; |
1269 | int node = dev ? dev_to_node(dev) : -1; | |
48c3c107 BZ |
1270 | int i; |
1271 | ||
a32296f9 | 1272 | host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); |
48c3c107 BZ |
1273 | if (host == NULL) |
1274 | return NULL; | |
1275 | ||
a36223b0 | 1276 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
48c3c107 | 1277 | ide_hwif_t *hwif; |
8cdf3100 | 1278 | int idx; |
48c3c107 BZ |
1279 | |
1280 | if (hws[i] == NULL) | |
1281 | continue; | |
1282 | ||
a32296f9 | 1283 | hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); |
18de1017 BZ |
1284 | if (hwif == NULL) |
1285 | continue; | |
1286 | ||
5e7f3a46 BZ |
1287 | if (ide_port_alloc_devices(hwif, node) < 0) { |
1288 | kfree(hwif); | |
1289 | continue; | |
1290 | } | |
1291 | ||
8cdf3100 BZ |
1292 | idx = ide_find_port_slot(d); |
1293 | if (idx < 0) { | |
1294 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1295 | d ? d->name : "ide"); | |
18de1017 | 1296 | kfree(hwif); |
8cdf3100 | 1297 | continue; |
48c3c107 | 1298 | } |
8cdf3100 | 1299 | |
8cdf3100 BZ |
1300 | ide_init_port_data(hwif, idx); |
1301 | ||
08da591e BZ |
1302 | hwif->host = host; |
1303 | ||
8cdf3100 BZ |
1304 | host->ports[i] = hwif; |
1305 | host->n_ports++; | |
48c3c107 BZ |
1306 | } |
1307 | ||
1308 | if (host->n_ports == 0) { | |
1309 | kfree(host); | |
1310 | return NULL; | |
1311 | } | |
1312 | ||
a32296f9 | 1313 | host->dev[0] = dev; |
6cdf6eb3 | 1314 | |
feb22b7f BZ |
1315 | if (d) { |
1316 | host->init_chipset = d->init_chipset; | |
e354c1d8 BZ |
1317 | host->get_lock = d->get_lock; |
1318 | host->release_lock = d->release_lock; | |
ef0b0427 | 1319 | host->host_flags = d->host_flags; |
feb22b7f | 1320 | } |
ef0b0427 | 1321 | |
48c3c107 BZ |
1322 | return host; |
1323 | } | |
48c3c107 BZ |
1324 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1325 | ||
9a100f4b BZ |
1326 | static void ide_port_free(ide_hwif_t *hwif) |
1327 | { | |
1328 | ide_port_free_devices(hwif); | |
1329 | ide_free_port_slot(hwif->index); | |
1330 | kfree(hwif); | |
1331 | } | |
1332 | ||
1333 | static void ide_disable_port(ide_hwif_t *hwif) | |
1334 | { | |
1335 | struct ide_host *host = hwif->host; | |
1336 | int i; | |
1337 | ||
1338 | printk(KERN_INFO "%s: disabling port\n", hwif->name); | |
1339 | ||
1340 | for (i = 0; i < MAX_HOST_PORTS; i++) { | |
1341 | if (host->ports[i] == hwif) { | |
1342 | host->ports[i] = NULL; | |
1343 | host->n_ports--; | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | ide_port_free(hwif); | |
1348 | } | |
1349 | ||
48c3c107 BZ |
1350 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
1351 | hw_regs_t **hws) | |
c413b9b9 BZ |
1352 | { |
1353 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1354 | int i, j = 0; |
8447d9d5 | 1355 | |
2bd24a1c | 1356 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 | 1357 | if (hwif == NULL) { |
c413b9b9 BZ |
1358 | mate = NULL; |
1359 | continue; | |
1360 | } | |
1361 | ||
c97c6aca | 1362 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1363 | ide_port_apply_params(hwif); |
1364 | ||
0a6e49e9 BZ |
1365 | if ((i & 1) && mate) { |
1366 | hwif->mate = mate; | |
1367 | mate->mate = hwif; | |
123995b9 | 1368 | } |
c413b9b9 | 1369 | |
0a6e49e9 BZ |
1370 | mate = (i & 1) ? NULL : hwif; |
1371 | ||
1372 | ide_init_port(hwif, i & 1, d); | |
1373 | ide_port_cable_detect(hwif); | |
7704ca2a | 1374 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1375 | } |
1376 | ||
2bd24a1c | 1377 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1378 | if (hwif == NULL) |
1379 | continue; | |
139ddfca | 1380 | |
eb716beb BZ |
1381 | if (ide_probe_port(hwif) == 0) |
1382 | hwif->present = 1; | |
a14dc574 | 1383 | |
c094ea07 BZ |
1384 | if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || |
1385 | hwif->mate == NULL || hwif->mate->present == 0) { | |
9a100f4b BZ |
1386 | if (ide_register_port(hwif)) { |
1387 | ide_disable_port(hwif); | |
1388 | continue; | |
1389 | } | |
1390 | } | |
a14dc574 | 1391 | |
eb716beb BZ |
1392 | if (hwif->present) |
1393 | ide_port_tune_devices(hwif); | |
2e13093a | 1394 | } |
ba6560aa | 1395 | |
2bd24a1c | 1396 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1397 | if (hwif == NULL) |
1398 | continue; | |
ba6560aa BZ |
1399 | |
1400 | if (hwif_init(hwif) == 0) { | |
1401 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1402 | "interface\n", hwif->name); | |
51d6ac70 IC |
1403 | device_unregister(&hwif->gendev); |
1404 | ide_disable_port(hwif); | |
ba6560aa BZ |
1405 | continue; |
1406 | } | |
decdc3f0 | 1407 | |
eb716beb | 1408 | if (hwif->present) |
e415e495 EO |
1409 | if (ide_port_setup_devices(hwif) == 0) { |
1410 | hwif->present = 0; | |
1411 | continue; | |
1412 | } | |
1413 | ||
1414 | j++; | |
26042d05 | 1415 | |
8b803bd1 | 1416 | ide_acpi_init_port(hwif); |
eb716beb BZ |
1417 | |
1418 | if (hwif->present) | |
1419 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1420 | } |
1421 | ||
2bd24a1c | 1422 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1423 | if (hwif == NULL) |
1424 | continue; | |
ba6560aa | 1425 | |
eb716beb | 1426 | if (hwif->present) |
ba6560aa | 1427 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1428 | } |
1429 | ||
2bd24a1c | 1430 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1431 | if (hwif == NULL) |
1432 | continue; | |
327617e1 | 1433 | |
eb716beb BZ |
1434 | ide_sysfs_register_port(hwif); |
1435 | ide_proc_register_port(hwif); | |
1436 | ||
1437 | if (hwif->present) | |
d9270a3f | 1438 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1439 | } |
1440 | ||
e0d00207 | 1441 | return j ? 0 : -1; |
8447d9d5 | 1442 | } |
48c3c107 | 1443 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1444 | |
6f904d01 BZ |
1445 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1446 | struct ide_host **hostp) | |
1447 | { | |
1448 | struct ide_host *host; | |
8a69580e | 1449 | int rc; |
6f904d01 BZ |
1450 | |
1451 | host = ide_host_alloc(d, hws); | |
1452 | if (host == NULL) | |
1453 | return -ENOMEM; | |
1454 | ||
8a69580e BZ |
1455 | rc = ide_host_register(host, d, hws); |
1456 | if (rc) { | |
1457 | ide_host_free(host); | |
1458 | return rc; | |
1459 | } | |
6f904d01 BZ |
1460 | |
1461 | if (hostp) | |
1462 | *hostp = host; | |
1463 | ||
1464 | return 0; | |
1465 | } | |
1466 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1467 | ||
b40d1b88 BZ |
1468 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
1469 | { | |
2bd24a1c | 1470 | ide_drive_t *drive; |
b40d1b88 BZ |
1471 | int i; |
1472 | ||
7ed5b157 BZ |
1473 | ide_port_for_each_present_dev(i, drive, hwif) { |
1474 | device_unregister(&drive->gendev); | |
1475 | wait_for_completion(&drive->gendev_rel_comp); | |
b40d1b88 BZ |
1476 | } |
1477 | } | |
1478 | ||
1479 | void ide_port_unregister_devices(ide_hwif_t *hwif) | |
1480 | { | |
1481 | mutex_lock(&ide_cfg_mtx); | |
1482 | __ide_port_unregister_devices(hwif); | |
1483 | hwif->present = 0; | |
1484 | ide_port_init_devices_data(hwif); | |
1485 | mutex_unlock(&ide_cfg_mtx); | |
1486 | } | |
1487 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
1488 | ||
1489 | /** | |
1490 | * ide_unregister - free an IDE interface | |
1491 | * @hwif: IDE interface | |
1492 | * | |
1493 | * Perform the final unregister of an IDE interface. | |
1494 | * | |
1495 | * Locking: | |
1496 | * The caller must not hold the IDE locks. | |
1497 | * | |
1498 | * It is up to the caller to be sure there is no pending I/O here, | |
1499 | * and that the interface will not be reopened (present/vanishing | |
1500 | * locking isn't yet done BTW). | |
1501 | */ | |
1502 | ||
1503 | static void ide_unregister(ide_hwif_t *hwif) | |
1504 | { | |
1505 | BUG_ON(in_interrupt()); | |
1506 | BUG_ON(irqs_disabled()); | |
1507 | ||
1508 | mutex_lock(&ide_cfg_mtx); | |
1509 | ||
1510 | if (hwif->present) { | |
1511 | __ide_port_unregister_devices(hwif); | |
1512 | hwif->present = 0; | |
1513 | } | |
1514 | ||
1515 | ide_proc_unregister_port(hwif); | |
1516 | ||
1517 | free_irq(hwif->irq, hwif); | |
1518 | ||
1519 | device_unregister(hwif->portdev); | |
1520 | device_unregister(&hwif->gendev); | |
1521 | wait_for_completion(&hwif->gendev_rel_comp); | |
1522 | ||
1523 | /* | |
1524 | * Remove us from the kernel's knowledge | |
1525 | */ | |
1526 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
1527 | kfree(hwif->sg_table); | |
1528 | unregister_blkdev(hwif->major, hwif->name); | |
1529 | ||
1530 | ide_release_dma_engine(hwif); | |
1531 | ||
1532 | mutex_unlock(&ide_cfg_mtx); | |
1533 | } | |
1534 | ||
8a69580e | 1535 | void ide_host_free(struct ide_host *host) |
151575e4 | 1536 | { |
8cdf3100 | 1537 | ide_hwif_t *hwif; |
151575e4 | 1538 | int i; |
8447d9d5 | 1539 | |
2bd24a1c | 1540 | ide_host_for_each_port(i, hwif, host) { |
9a100f4b BZ |
1541 | if (hwif) |
1542 | ide_port_free(hwif); | |
c97c6aca | 1543 | } |
151575e4 | 1544 | |
48c3c107 | 1545 | kfree(host); |
151575e4 | 1546 | } |
8a69580e BZ |
1547 | EXPORT_SYMBOL_GPL(ide_host_free); |
1548 | ||
1549 | void ide_host_remove(struct ide_host *host) | |
1550 | { | |
2bd24a1c | 1551 | ide_hwif_t *hwif; |
8a69580e BZ |
1552 | int i; |
1553 | ||
2bd24a1c BZ |
1554 | ide_host_for_each_port(i, hwif, host) { |
1555 | if (hwif) | |
1556 | ide_unregister(hwif); | |
8a69580e BZ |
1557 | } |
1558 | ||
1559 | ide_host_free(host); | |
1560 | } | |
48c3c107 | 1561 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1562 | |
1563 | void ide_port_scan(ide_hwif_t *hwif) | |
1564 | { | |
9fd91d95 | 1565 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1566 | ide_port_cable_detect(hwif); |
1567 | ide_port_init_devices(hwif); | |
1568 | ||
1569 | if (ide_probe_port(hwif) < 0) | |
1570 | return; | |
1571 | ||
1572 | hwif->present = 1; | |
1573 | ||
1574 | ide_port_tune_devices(hwif); | |
2dde7861 | 1575 | ide_port_setup_devices(hwif); |
e630fcbe | 1576 | ide_acpi_port_init_devices(hwif); |
2dde7861 BZ |
1577 | hwif_register_devices(hwif); |
1578 | ide_proc_port_register_devices(hwif); | |
1579 | } | |
1580 | EXPORT_SYMBOL_GPL(ide_port_scan); |