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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")) |
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) | |
ecf3a31d | 263 | tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); |
a182807a | 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); | |
fdd88f0a | 393 | tp_ops->dev_select(drive); |
1da177e4 | 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 */ |
fdd88f0a | 399 | tp_ops->dev_select(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); |
fdd88f0a | 425 | tp_ops->dev_select(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 */ |
fdd88f0a | 444 | tp_ops->dev_select(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 | { |
fdd88f0a | 608 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
2bd24a1c BZ |
609 | ide_drive_t *drive; |
610 | int i, rc; | |
1da177e4 LT |
611 | |
612 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
613 | ||
614 | /* Let HW settle down a bit from whatever init state we | |
615 | * come from */ | |
616 | mdelay(2); | |
617 | ||
618 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
619 | * I know of at least one disk who takes 31 seconds, I use 35 | |
620 | * here to be safe | |
621 | */ | |
622 | rc = ide_wait_not_busy(hwif, 35000); | |
623 | if (rc) | |
624 | return rc; | |
625 | ||
626 | /* Now make sure both master & slave are ready */ | |
2bd24a1c | 627 | ide_port_for_each_dev(i, drive, hwif) { |
8266105b | 628 | /* Ignore disks that we will not probe for later. */ |
97100fc8 BZ |
629 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
630 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
fdd88f0a SS |
631 | tp_ops->dev_select(drive); |
632 | tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); | |
8266105b JS |
633 | mdelay(2); |
634 | rc = ide_wait_not_busy(hwif, 35000); | |
635 | if (rc) | |
636 | goto out; | |
637 | } else | |
638 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
639 | drive->name); | |
640 | } | |
641 | out: | |
1da177e4 | 642 | /* Exit function with master reselected (let's be sane) */ |
2bd24a1c | 643 | if (i) |
fdd88f0a | 644 | tp_ops->dev_select(hwif->devices[0]); |
8266105b | 645 | |
1da177e4 LT |
646 | return rc; |
647 | } | |
648 | ||
649 | /** | |
650 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 651 | * @dev1: slave device |
1da177e4 LT |
652 | * |
653 | * Analyse the drives on the interface and attempt to decide if we | |
654 | * have the same drive viewed twice. This occurs with crap CF adapters | |
655 | * and PCMCIA sometimes. | |
656 | */ | |
657 | ||
4dde4492 | 658 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 659 | { |
5e7f3a46 | 660 | ide_drive_t *dev0 = dev1->hwif->devices[0]; |
1da177e4 | 661 | |
97100fc8 | 662 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
663 | return; |
664 | ||
665 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
666 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
667 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
668 | return; |
669 | ||
670 | /* Serial numbers do not match */ | |
4dde4492 BZ |
671 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
672 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
673 | return; |
674 | ||
675 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 676 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
677 | return; |
678 | ||
679 | /* Appears to be an IDE flash adapter with decode bugs */ | |
680 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
681 | ||
97100fc8 | 682 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
683 | } |
684 | ||
685 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
686 | ||
9d501529 | 687 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 688 | { |
2bd24a1c | 689 | ide_drive_t *drive; |
1da177e4 | 690 | unsigned int irqd; |
2bd24a1c | 691 | int i, rc = -ENODEV; |
a14dc574 BZ |
692 | |
693 | BUG_ON(hwif->present); | |
1da177e4 | 694 | |
5e7f3a46 BZ |
695 | if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) && |
696 | (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 697 | return -EACCES; |
1da177e4 | 698 | |
1da177e4 LT |
699 | /* |
700 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
701 | * we'll install our IRQ driver much later... | |
702 | */ | |
703 | irqd = hwif->irq; | |
704 | if (irqd) | |
705 | disable_irq(hwif->irq); | |
706 | ||
c860a8f2 | 707 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
708 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
709 | ||
710 | /* | |
f367bed0 BZ |
711 | * Second drive should only exist if first drive was found, |
712 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 713 | */ |
2bd24a1c | 714 | ide_port_for_each_dev(i, drive, hwif) { |
1da177e4 | 715 | (void) probe_for_drive(drive); |
97100fc8 | 716 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 717 | rc = 0; |
1da177e4 | 718 | } |
e460a597 | 719 | |
1da177e4 LT |
720 | /* |
721 | * Use cached IRQ number. It might be (and is...) changed by probe | |
722 | * code above | |
723 | */ | |
724 | if (irqd) | |
725 | enable_irq(irqd); | |
726 | ||
a14dc574 | 727 | return rc; |
e84e7ea7 BZ |
728 | } |
729 | ||
730 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
731 | { | |
ac95beed | 732 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c BZ |
733 | ide_drive_t *drive; |
734 | int i; | |
f01393e4 | 735 | |
7ed5b157 BZ |
736 | ide_port_for_each_present_dev(i, drive, hwif) { |
737 | if (port_ops && port_ops->quirkproc) | |
738 | port_ops->quirkproc(drive); | |
f01393e4 | 739 | } |
0380dad4 | 740 | |
7ed5b157 BZ |
741 | ide_port_for_each_present_dev(i, drive, hwif) { |
742 | ide_set_max_pio(drive); | |
1da177e4 | 743 | |
7ed5b157 | 744 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 745 | |
7ed5b157 BZ |
746 | if (hwif->dma_ops) |
747 | ide_set_dma(drive); | |
1da177e4 LT |
748 | } |
749 | } | |
750 | ||
1da177e4 LT |
751 | /* |
752 | * init request queue | |
753 | */ | |
754 | static int ide_init_queue(ide_drive_t *drive) | |
755 | { | |
165125e1 | 756 | struct request_queue *q; |
898ec223 | 757 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 LT |
758 | int max_sectors = 256; |
759 | int max_sg_entries = PRD_ENTRIES; | |
760 | ||
761 | /* | |
762 | * Our default set up assumes the normal IDE case, | |
763 | * that is 64K segmenting, standard PRD setup | |
764 | * and LBA28. Some drivers then impose their own | |
765 | * limits and LBA48 we could raise it but as yet | |
766 | * do not. | |
767 | */ | |
1946089a | 768 | |
201bffa4 | 769 | q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif)); |
1da177e4 LT |
770 | if (!q) |
771 | return 1; | |
772 | ||
773 | q->queuedata = drive; | |
774 | blk_queue_segment_boundary(q, 0xffff); | |
775 | ||
1da177e4 LT |
776 | if (hwif->rqsize < max_sectors) |
777 | max_sectors = hwif->rqsize; | |
778 | blk_queue_max_sectors(q, max_sectors); | |
779 | ||
780 | #ifdef CONFIG_PCI | |
781 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
782 | * creates segments that don't completely match our boundary | |
783 | * requirements and thus need to be broken up again. Because it | |
784 | * doesn't align properly either, we may actually have to break up | |
785 | * to more segments than what was we got in the first place, a max | |
786 | * worst case is twice as many. | |
787 | * This will be fixed once we teach pci_map_sg() about our boundary | |
788 | * requirements, hopefully soon. *FIXME* | |
789 | */ | |
790 | if (!PCI_DMA_BUS_IS_PHYS) | |
791 | max_sg_entries >>= 1; | |
792 | #endif /* CONFIG_PCI */ | |
793 | ||
794 | blk_queue_max_hw_segments(q, max_sg_entries); | |
795 | blk_queue_max_phys_segments(q, max_sg_entries); | |
796 | ||
797 | /* assign drive queue */ | |
798 | drive->queue = q; | |
799 | ||
800 | /* needs drive->queue to be set */ | |
801 | ide_toggle_bounce(drive, 1); | |
802 | ||
1da177e4 LT |
803 | return 0; |
804 | } | |
805 | ||
b40d1b88 BZ |
806 | static DEFINE_MUTEX(ide_cfg_mtx); |
807 | ||
d5bc6592 BZ |
808 | /* |
809 | * For any present drive: | |
810 | * - allocate the block device queue | |
d5bc6592 | 811 | */ |
e415e495 | 812 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 813 | { |
2bd24a1c | 814 | ide_drive_t *drive; |
e415e495 | 815 | int i, j = 0; |
d5bc6592 | 816 | |
26042d05 | 817 | mutex_lock(&ide_cfg_mtx); |
7ed5b157 | 818 | ide_port_for_each_present_dev(i, drive, hwif) { |
d5bc6592 BZ |
819 | if (ide_init_queue(drive)) { |
820 | printk(KERN_ERR "ide: failed to init %s\n", | |
821 | drive->name); | |
e415e495 EO |
822 | kfree(drive->id); |
823 | drive->id = NULL; | |
824 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; | |
d5bc6592 BZ |
825 | continue; |
826 | } | |
827 | ||
e415e495 | 828 | j++; |
d5bc6592 | 829 | } |
26042d05 | 830 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
831 | |
832 | return j; | |
d5bc6592 BZ |
833 | } |
834 | ||
1da177e4 | 835 | /* |
b65fac32 | 836 | * This routine sets up the IRQ for an IDE interface. |
1da177e4 LT |
837 | */ |
838 | static int init_irq (ide_hwif_t *hwif) | |
839 | { | |
4c3032d8 | 840 | struct ide_io_ports *io_ports = &hwif->io_ports; |
255115fb BZ |
841 | struct ide_host *host = hwif->host; |
842 | irq_handler_t irq_handler = host->irq_handler; | |
843 | int sa = host->irq_flags; | |
1da177e4 | 844 | |
849d7130 SG |
845 | if (irq_handler == NULL) |
846 | irq_handler = ide_intr; | |
847 | ||
ae86afae | 848 | if (io_ports->ctl_addr) |
ecf3a31d | 849 | hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
1da177e4 | 850 | |
849d7130 | 851 | if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif)) |
b65fac32 | 852 | goto out_up; |
1da177e4 | 853 | |
7b892806 | 854 | #if !defined(__mc68000__) |
1b8ebad8 | 855 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
856 | io_ports->data_addr, io_ports->status_addr, |
857 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 858 | #else |
1b8ebad8 | 859 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 860 | io_ports->data_addr, hwif->irq); |
7b892806 | 861 | #endif /* __mc68000__ */ |
b65fac32 BZ |
862 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) |
863 | printk(KERN_CONT " (serialized)"); | |
1b8ebad8 | 864 | printk(KERN_CONT "\n"); |
d5bc6592 | 865 | |
1da177e4 | 866 | return 0; |
1da177e4 | 867 | out_up: |
1da177e4 LT |
868 | return 1; |
869 | } | |
870 | ||
871 | static int ata_lock(dev_t dev, void *data) | |
872 | { | |
873 | /* FIXME: we want to pin hwif down */ | |
874 | return 0; | |
875 | } | |
876 | ||
877 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
878 | { | |
879 | ide_hwif_t *hwif = data; | |
880 | int unit = *part >> PARTN_BITS; | |
5e7f3a46 | 881 | ide_drive_t *drive = hwif->devices[unit]; |
97100fc8 BZ |
882 | |
883 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
884 | return NULL; |
885 | ||
886 | if (drive->media == ide_disk) | |
887 | request_module("ide-disk"); | |
1da177e4 LT |
888 | if (drive->media == ide_cdrom || drive->media == ide_optical) |
889 | request_module("ide-cd"); | |
890 | if (drive->media == ide_tape) | |
891 | request_module("ide-tape"); | |
892 | if (drive->media == ide_floppy) | |
893 | request_module("ide-floppy"); | |
894 | ||
895 | return NULL; | |
896 | } | |
897 | ||
898 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
899 | { | |
900 | struct gendisk *p = data; | |
901 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 902 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
903 | } |
904 | ||
905 | static int exact_lock(dev_t dev, void *data) | |
906 | { | |
907 | struct gendisk *p = data; | |
908 | ||
909 | if (!get_disk(p)) | |
910 | return -1; | |
911 | return 0; | |
912 | } | |
913 | ||
914 | void ide_register_region(struct gendisk *disk) | |
915 | { | |
916 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
917 | disk->minors, NULL, exact_match, exact_lock, disk); | |
918 | } | |
919 | ||
920 | EXPORT_SYMBOL_GPL(ide_register_region); | |
921 | ||
922 | void ide_unregister_region(struct gendisk *disk) | |
923 | { | |
924 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
925 | disk->minors); | |
926 | } | |
927 | ||
928 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
929 | ||
930 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
931 | { | |
932 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 933 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
934 | |
935 | disk->major = hwif->major; | |
936 | disk->first_minor = unit << PARTN_BITS; | |
937 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
938 | disk->queue = drive->queue; | |
939 | } | |
940 | ||
941 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
942 | ||
943 | static void drive_release_dev (struct device *dev) | |
944 | { | |
945 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
946 | ||
5b0c4b30 BZ |
947 | ide_proc_unregister_device(drive); |
948 | ||
b5479167 BZ |
949 | blk_cleanup_queue(drive->queue); |
950 | drive->queue = NULL; | |
951 | ||
6044ec88 JJ |
952 | kfree(drive->id); |
953 | drive->id = NULL; | |
b5479167 | 954 | |
97100fc8 | 955 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 956 | |
f36d4024 | 957 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
958 | } |
959 | ||
1da177e4 LT |
960 | static int hwif_init(ide_hwif_t *hwif) |
961 | { | |
1da177e4 | 962 | if (!hwif->irq) { |
8b07ed26 BZ |
963 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
964 | return 0; | |
1da177e4 | 965 | } |
1da177e4 | 966 | |
1da177e4 LT |
967 | if (register_blkdev(hwif->major, hwif->name)) |
968 | return 0; | |
969 | ||
970 | if (!hwif->sg_max_nents) | |
971 | hwif->sg_max_nents = PRD_ENTRIES; | |
972 | ||
45711f1a | 973 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
974 | GFP_KERNEL); |
975 | if (!hwif->sg_table) { | |
976 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
977 | goto out; | |
978 | } | |
45711f1a JA |
979 | |
980 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 | 981 | |
1da177e4 | 982 | if (init_irq(hwif)) { |
8b07ed26 BZ |
983 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
984 | hwif->name, hwif->irq); | |
1da177e4 LT |
985 | goto out; |
986 | } | |
1da177e4 | 987 | |
3a4e7c96 BZ |
988 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
989 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
990 | return 1; |
991 | ||
992 | out: | |
993 | unregister_blkdev(hwif->major, hwif->name); | |
994 | return 0; | |
995 | } | |
996 | ||
9601a607 BZ |
997 | static void hwif_register_devices(ide_hwif_t *hwif) |
998 | { | |
2bd24a1c | 999 | ide_drive_t *drive; |
9601a607 BZ |
1000 | unsigned int i; |
1001 | ||
7ed5b157 | 1002 | ide_port_for_each_present_dev(i, drive, hwif) { |
c5d70cc7 BZ |
1003 | struct device *dev = &drive->gendev; |
1004 | int ret; | |
9601a607 | 1005 | |
dc09c784 | 1006 | dev_set_name(dev, "%u.%u", hwif->index, i); |
c5d70cc7 BZ |
1007 | dev->parent = &hwif->gendev; |
1008 | dev->bus = &ide_bus_type; | |
1009 | dev->driver_data = drive; | |
1010 | dev->release = drive_release_dev; | |
1011 | ||
1012 | ret = device_register(dev); | |
1013 | if (ret < 0) | |
1014 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1015 | "%d\n", __func__, ret); | |
9601a607 BZ |
1016 | } |
1017 | } | |
1018 | ||
7704ca2a BZ |
1019 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1020 | { | |
ac95beed | 1021 | const struct ide_port_ops *port_ops = hwif->port_ops; |
2bd24a1c | 1022 | ide_drive_t *drive; |
7704ca2a BZ |
1023 | int i; |
1024 | ||
2bd24a1c | 1025 | ide_port_for_each_dev(i, drive, hwif) { |
123995b9 BZ |
1026 | drive->dn = i + hwif->channel * 2; |
1027 | ||
7704ca2a BZ |
1028 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1029 | drive->io_32bit = 1; | |
7610c4f5 BZ |
1030 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
1031 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
7704ca2a | 1032 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) |
97100fc8 | 1033 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1034 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1035 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1036 | |
e6d95bd1 BZ |
1037 | if (port_ops && port_ops->init_dev) |
1038 | port_ops->init_dev(drive); | |
1039 | } | |
7704ca2a BZ |
1040 | } |
1041 | ||
c413b9b9 BZ |
1042 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1043 | const struct ide_port_info *d) | |
8447d9d5 | 1044 | { |
b7691646 | 1045 | hwif->channel = port; |
c413b9b9 BZ |
1046 | |
1047 | if (d->chipset) | |
1048 | hwif->chipset = d->chipset; | |
1049 | ||
1050 | if (d->init_iops) | |
1051 | d->init_iops(hwif); | |
1052 | ||
23f8e4bf BZ |
1053 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1054 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1055 | hwif->pio_mask = d->pio_mask; |
1056 | ||
374e042c BZ |
1057 | if (d->tp_ops) |
1058 | hwif->tp_ops = d->tp_ops; | |
1059 | ||
ac95beed | 1060 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
2787cb8a | 1061 | if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0) |
ac95beed BZ |
1062 | hwif->port_ops = d->port_ops; |
1063 | ||
c413b9b9 BZ |
1064 | hwif->swdma_mask = d->swdma_mask; |
1065 | hwif->mwdma_mask = d->mwdma_mask; | |
1066 | hwif->ultra_mask = d->udma_mask; | |
1067 | ||
b123f56e BZ |
1068 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1069 | int rc; | |
1070 | ||
592b5315 SS |
1071 | hwif->dma_ops = d->dma_ops; |
1072 | ||
b123f56e BZ |
1073 | if (d->init_dma) |
1074 | rc = d->init_dma(hwif, d); | |
1075 | else | |
1076 | rc = ide_hwif_setup_dma(hwif, d); | |
1077 | ||
1078 | if (rc < 0) { | |
1079 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
592b5315 SS |
1080 | |
1081 | hwif->dma_ops = NULL; | |
ebb00fb5 | 1082 | hwif->dma_base = 0; |
b123f56e BZ |
1083 | hwif->swdma_mask = 0; |
1084 | hwif->mwdma_mask = 0; | |
1085 | hwif->ultra_mask = 0; | |
592b5315 | 1086 | } |
b123f56e | 1087 | } |
c413b9b9 | 1088 | |
1024c5f4 | 1089 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
702c026b BZ |
1090 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1091 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; | |
1024c5f4 | 1092 | |
6b492496 BZ |
1093 | if (d->max_sectors) |
1094 | hwif->rqsize = d->max_sectors; | |
70775e9c BZ |
1095 | else { |
1096 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1097 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1098 | hwif->rqsize = 256; | |
1099 | else | |
1100 | hwif->rqsize = 65536; | |
1101 | } | |
c413b9b9 BZ |
1102 | |
1103 | /* call chipset specific routine for each enabled port */ | |
1104 | if (d->init_hwif) | |
1105 | d->init_hwif(hwif); | |
c7f6f21a | 1106 | } |
bfa14b42 | 1107 | |
c7f6f21a BZ |
1108 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1109 | { | |
ac95beed BZ |
1110 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1111 | ||
1112 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1113 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1114 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1115 | } |
c413b9b9 BZ |
1116 | } |
1117 | ||
b40d1b88 BZ |
1118 | static const u8 ide_hwif_to_major[] = |
1119 | { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR, | |
1120 | IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR }; | |
1121 | ||
1122 | static void ide_port_init_devices_data(ide_hwif_t *hwif) | |
1123 | { | |
2bd24a1c BZ |
1124 | ide_drive_t *drive; |
1125 | int i; | |
b40d1b88 | 1126 | |
2bd24a1c BZ |
1127 | ide_port_for_each_dev(i, drive, hwif) { |
1128 | u8 j = (hwif->index * MAX_DRIVES) + i; | |
b40d1b88 BZ |
1129 | |
1130 | memset(drive, 0, sizeof(*drive)); | |
1131 | ||
1132 | drive->media = ide_disk; | |
2bd24a1c | 1133 | drive->select = (i << 4) | ATA_DEVICE_OBS; |
b40d1b88 BZ |
1134 | drive->hwif = hwif; |
1135 | drive->ready_stat = ATA_DRDY; | |
1136 | drive->bad_wstat = BAD_W_STAT; | |
1137 | drive->special.b.recalibrate = 1; | |
1138 | drive->special.b.set_geometry = 1; | |
1139 | drive->name[0] = 'h'; | |
1140 | drive->name[1] = 'd'; | |
1141 | drive->name[2] = 'a' + j; | |
1142 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; | |
1143 | ||
1144 | INIT_LIST_HEAD(&drive->list); | |
1145 | init_completion(&drive->gendev_rel_comp); | |
1146 | } | |
1147 | } | |
1148 | ||
1149 | static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index) | |
1150 | { | |
b40d1b88 BZ |
1151 | /* fill in any non-zero initial values */ |
1152 | hwif->index = index; | |
1153 | hwif->major = ide_hwif_to_major[index]; | |
1154 | ||
1155 | hwif->name[0] = 'i'; | |
1156 | hwif->name[1] = 'd'; | |
1157 | hwif->name[2] = 'e'; | |
1158 | hwif->name[3] = '0' + index; | |
1159 | ||
7362951b BZ |
1160 | spin_lock_init(&hwif->lock); |
1161 | ||
1162 | init_timer(&hwif->timer); | |
1163 | hwif->timer.function = &ide_timer_expiry; | |
1164 | hwif->timer.data = (unsigned long)hwif; | |
1165 | ||
b40d1b88 BZ |
1166 | init_completion(&hwif->gendev_rel_comp); |
1167 | ||
1168 | hwif->tp_ops = &default_tp_ops; | |
1169 | ||
1170 | ide_port_init_devices_data(hwif); | |
1171 | } | |
1172 | ||
1173 | static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw) | |
1174 | { | |
1175 | memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports)); | |
1176 | hwif->irq = hw->irq; | |
1177 | hwif->chipset = hw->chipset; | |
1178 | hwif->dev = hw->dev; | |
1179 | hwif->gendev.parent = hw->parent ? hw->parent : hw->dev; | |
1180 | hwif->ack_intr = hw->ack_intr; | |
1181 | hwif->config_data = hw->config; | |
1182 | } | |
1183 | ||
8cdf3100 BZ |
1184 | static unsigned int ide_indexes; |
1185 | ||
fe80b937 | 1186 | /** |
8cdf3100 | 1187 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1188 | * @d: IDE port info |
1189 | * | |
8cdf3100 | 1190 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1191 | */ |
1192 | ||
8cdf3100 | 1193 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1194 | { |
8cdf3100 | 1195 | int idx = -ENOENT; |
fe80b937 | 1196 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1197 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1198 | |
1199 | /* | |
1200 | * Claim an unassigned slot. | |
1201 | * | |
1202 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1203 | * just in case there's another interface yet-to-be-scanned | |
1204 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1205 | * | |
1206 | * Unless there is a bootable card that does not use the standard | |
1207 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1208 | */ | |
8cdf3100 | 1209 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1210 | if (bootable) { |
1211 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1212 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1213 | } else { |
75d21fff BZ |
1214 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1215 | idx = ffz(ide_indexes | 3); | |
1216 | else if ((ide_indexes & 3) != 3) | |
1217 | idx = ffz(ide_indexes); | |
fe80b937 | 1218 | } |
8cdf3100 BZ |
1219 | if (idx >= 0) |
1220 | ide_indexes |= (1 << idx); | |
1221 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1222 | |
8cdf3100 BZ |
1223 | return idx; |
1224 | } | |
256c5f8e | 1225 | |
8cdf3100 BZ |
1226 | static void ide_free_port_slot(int idx) |
1227 | { | |
1228 | mutex_lock(&ide_cfg_mtx); | |
1229 | ide_indexes &= ~(1 << idx); | |
1230 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1231 | } |
fe80b937 | 1232 | |
5e7f3a46 BZ |
1233 | static void ide_port_free_devices(ide_hwif_t *hwif) |
1234 | { | |
2bd24a1c | 1235 | ide_drive_t *drive; |
5e7f3a46 BZ |
1236 | int i; |
1237 | ||
2bd24a1c BZ |
1238 | ide_port_for_each_dev(i, drive, hwif) |
1239 | kfree(drive); | |
5e7f3a46 BZ |
1240 | } |
1241 | ||
1242 | static int ide_port_alloc_devices(ide_hwif_t *hwif, int node) | |
1243 | { | |
1244 | int i; | |
1245 | ||
1246 | for (i = 0; i < MAX_DRIVES; i++) { | |
1247 | ide_drive_t *drive; | |
1248 | ||
1249 | drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node); | |
1250 | if (drive == NULL) | |
1251 | goto out_nomem; | |
1252 | ||
1253 | hwif->devices[i] = drive; | |
1254 | } | |
1255 | return 0; | |
1256 | ||
1257 | out_nomem: | |
1258 | ide_port_free_devices(hwif); | |
1259 | return -ENOMEM; | |
1260 | } | |
1261 | ||
a36223b0 | 1262 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
48c3c107 BZ |
1263 | { |
1264 | struct ide_host *host; | |
a32296f9 BZ |
1265 | struct device *dev = hws[0] ? hws[0]->dev : NULL; |
1266 | int node = dev ? dev_to_node(dev) : -1; | |
48c3c107 BZ |
1267 | int i; |
1268 | ||
a32296f9 | 1269 | host = kzalloc_node(sizeof(*host), GFP_KERNEL, node); |
48c3c107 BZ |
1270 | if (host == NULL) |
1271 | return NULL; | |
1272 | ||
a36223b0 | 1273 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
48c3c107 | 1274 | ide_hwif_t *hwif; |
8cdf3100 | 1275 | int idx; |
48c3c107 BZ |
1276 | |
1277 | if (hws[i] == NULL) | |
1278 | continue; | |
1279 | ||
a32296f9 | 1280 | hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node); |
18de1017 BZ |
1281 | if (hwif == NULL) |
1282 | continue; | |
1283 | ||
5e7f3a46 BZ |
1284 | if (ide_port_alloc_devices(hwif, node) < 0) { |
1285 | kfree(hwif); | |
1286 | continue; | |
1287 | } | |
1288 | ||
8cdf3100 BZ |
1289 | idx = ide_find_port_slot(d); |
1290 | if (idx < 0) { | |
1291 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1292 | d ? d->name : "ide"); | |
18de1017 | 1293 | kfree(hwif); |
8cdf3100 | 1294 | continue; |
48c3c107 | 1295 | } |
8cdf3100 | 1296 | |
8cdf3100 BZ |
1297 | ide_init_port_data(hwif, idx); |
1298 | ||
08da591e BZ |
1299 | hwif->host = host; |
1300 | ||
8cdf3100 BZ |
1301 | host->ports[i] = hwif; |
1302 | host->n_ports++; | |
48c3c107 BZ |
1303 | } |
1304 | ||
1305 | if (host->n_ports == 0) { | |
1306 | kfree(host); | |
1307 | return NULL; | |
1308 | } | |
1309 | ||
a32296f9 | 1310 | host->dev[0] = dev; |
6cdf6eb3 | 1311 | |
feb22b7f BZ |
1312 | if (d) { |
1313 | host->init_chipset = d->init_chipset; | |
e354c1d8 BZ |
1314 | host->get_lock = d->get_lock; |
1315 | host->release_lock = d->release_lock; | |
ef0b0427 | 1316 | host->host_flags = d->host_flags; |
feb22b7f | 1317 | } |
ef0b0427 | 1318 | |
48c3c107 BZ |
1319 | return host; |
1320 | } | |
48c3c107 BZ |
1321 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1322 | ||
9a100f4b BZ |
1323 | static void ide_port_free(ide_hwif_t *hwif) |
1324 | { | |
1325 | ide_port_free_devices(hwif); | |
1326 | ide_free_port_slot(hwif->index); | |
1327 | kfree(hwif); | |
1328 | } | |
1329 | ||
1330 | static void ide_disable_port(ide_hwif_t *hwif) | |
1331 | { | |
1332 | struct ide_host *host = hwif->host; | |
1333 | int i; | |
1334 | ||
1335 | printk(KERN_INFO "%s: disabling port\n", hwif->name); | |
1336 | ||
1337 | for (i = 0; i < MAX_HOST_PORTS; i++) { | |
1338 | if (host->ports[i] == hwif) { | |
1339 | host->ports[i] = NULL; | |
1340 | host->n_ports--; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | ide_port_free(hwif); | |
1345 | } | |
1346 | ||
48c3c107 BZ |
1347 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, |
1348 | hw_regs_t **hws) | |
c413b9b9 BZ |
1349 | { |
1350 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1351 | int i, j = 0; |
8447d9d5 | 1352 | |
2bd24a1c | 1353 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 | 1354 | if (hwif == NULL) { |
c413b9b9 BZ |
1355 | mate = NULL; |
1356 | continue; | |
1357 | } | |
1358 | ||
c97c6aca | 1359 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1360 | ide_port_apply_params(hwif); |
1361 | ||
0a6e49e9 BZ |
1362 | if ((i & 1) && mate) { |
1363 | hwif->mate = mate; | |
1364 | mate->mate = hwif; | |
123995b9 | 1365 | } |
c413b9b9 | 1366 | |
0a6e49e9 BZ |
1367 | mate = (i & 1) ? NULL : hwif; |
1368 | ||
1369 | ide_init_port(hwif, i & 1, d); | |
1370 | ide_port_cable_detect(hwif); | |
7704ca2a | 1371 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1372 | } |
1373 | ||
2bd24a1c | 1374 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1375 | if (hwif == NULL) |
1376 | continue; | |
139ddfca | 1377 | |
eb716beb BZ |
1378 | if (ide_probe_port(hwif) == 0) |
1379 | hwif->present = 1; | |
a14dc574 | 1380 | |
c094ea07 BZ |
1381 | if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 || |
1382 | hwif->mate == NULL || hwif->mate->present == 0) { | |
9a100f4b BZ |
1383 | if (ide_register_port(hwif)) { |
1384 | ide_disable_port(hwif); | |
1385 | continue; | |
1386 | } | |
1387 | } | |
a14dc574 | 1388 | |
eb716beb BZ |
1389 | if (hwif->present) |
1390 | ide_port_tune_devices(hwif); | |
2e13093a | 1391 | } |
ba6560aa | 1392 | |
2bd24a1c | 1393 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1394 | if (hwif == NULL) |
1395 | continue; | |
ba6560aa BZ |
1396 | |
1397 | if (hwif_init(hwif) == 0) { | |
1398 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1399 | "interface\n", hwif->name); | |
51d6ac70 IC |
1400 | device_unregister(&hwif->gendev); |
1401 | ide_disable_port(hwif); | |
ba6560aa BZ |
1402 | continue; |
1403 | } | |
decdc3f0 | 1404 | |
eb716beb | 1405 | if (hwif->present) |
e415e495 EO |
1406 | if (ide_port_setup_devices(hwif) == 0) { |
1407 | hwif->present = 0; | |
1408 | continue; | |
1409 | } | |
1410 | ||
1411 | j++; | |
26042d05 | 1412 | |
8b803bd1 | 1413 | ide_acpi_init_port(hwif); |
eb716beb BZ |
1414 | |
1415 | if (hwif->present) | |
1416 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1417 | } |
1418 | ||
2bd24a1c | 1419 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1420 | if (hwif == NULL) |
1421 | continue; | |
ba6560aa | 1422 | |
eb716beb | 1423 | if (hwif->present) |
ba6560aa | 1424 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1425 | } |
1426 | ||
2bd24a1c | 1427 | ide_host_for_each_port(i, hwif, host) { |
e0d00207 BZ |
1428 | if (hwif == NULL) |
1429 | continue; | |
327617e1 | 1430 | |
eb716beb BZ |
1431 | ide_sysfs_register_port(hwif); |
1432 | ide_proc_register_port(hwif); | |
1433 | ||
1434 | if (hwif->present) | |
d9270a3f | 1435 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1436 | } |
1437 | ||
e0d00207 | 1438 | return j ? 0 : -1; |
8447d9d5 | 1439 | } |
48c3c107 | 1440 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1441 | |
6f904d01 BZ |
1442 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1443 | struct ide_host **hostp) | |
1444 | { | |
1445 | struct ide_host *host; | |
8a69580e | 1446 | int rc; |
6f904d01 BZ |
1447 | |
1448 | host = ide_host_alloc(d, hws); | |
1449 | if (host == NULL) | |
1450 | return -ENOMEM; | |
1451 | ||
8a69580e BZ |
1452 | rc = ide_host_register(host, d, hws); |
1453 | if (rc) { | |
1454 | ide_host_free(host); | |
1455 | return rc; | |
1456 | } | |
6f904d01 BZ |
1457 | |
1458 | if (hostp) | |
1459 | *hostp = host; | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1464 | ||
b40d1b88 BZ |
1465 | static void __ide_port_unregister_devices(ide_hwif_t *hwif) |
1466 | { | |
2bd24a1c | 1467 | ide_drive_t *drive; |
b40d1b88 BZ |
1468 | int i; |
1469 | ||
7ed5b157 BZ |
1470 | ide_port_for_each_present_dev(i, drive, hwif) { |
1471 | device_unregister(&drive->gendev); | |
1472 | wait_for_completion(&drive->gendev_rel_comp); | |
b40d1b88 BZ |
1473 | } |
1474 | } | |
1475 | ||
1476 | void ide_port_unregister_devices(ide_hwif_t *hwif) | |
1477 | { | |
1478 | mutex_lock(&ide_cfg_mtx); | |
1479 | __ide_port_unregister_devices(hwif); | |
1480 | hwif->present = 0; | |
1481 | ide_port_init_devices_data(hwif); | |
1482 | mutex_unlock(&ide_cfg_mtx); | |
1483 | } | |
1484 | EXPORT_SYMBOL_GPL(ide_port_unregister_devices); | |
1485 | ||
1486 | /** | |
1487 | * ide_unregister - free an IDE interface | |
1488 | * @hwif: IDE interface | |
1489 | * | |
1490 | * Perform the final unregister of an IDE interface. | |
1491 | * | |
1492 | * Locking: | |
1493 | * The caller must not hold the IDE locks. | |
1494 | * | |
1495 | * It is up to the caller to be sure there is no pending I/O here, | |
1496 | * and that the interface will not be reopened (present/vanishing | |
1497 | * locking isn't yet done BTW). | |
1498 | */ | |
1499 | ||
1500 | static void ide_unregister(ide_hwif_t *hwif) | |
1501 | { | |
1502 | BUG_ON(in_interrupt()); | |
1503 | BUG_ON(irqs_disabled()); | |
1504 | ||
1505 | mutex_lock(&ide_cfg_mtx); | |
1506 | ||
1507 | if (hwif->present) { | |
1508 | __ide_port_unregister_devices(hwif); | |
1509 | hwif->present = 0; | |
1510 | } | |
1511 | ||
1512 | ide_proc_unregister_port(hwif); | |
1513 | ||
1514 | free_irq(hwif->irq, hwif); | |
1515 | ||
1516 | device_unregister(hwif->portdev); | |
1517 | device_unregister(&hwif->gendev); | |
1518 | wait_for_completion(&hwif->gendev_rel_comp); | |
1519 | ||
1520 | /* | |
1521 | * Remove us from the kernel's knowledge | |
1522 | */ | |
1523 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
1524 | kfree(hwif->sg_table); | |
1525 | unregister_blkdev(hwif->major, hwif->name); | |
1526 | ||
1527 | ide_release_dma_engine(hwif); | |
1528 | ||
1529 | mutex_unlock(&ide_cfg_mtx); | |
1530 | } | |
1531 | ||
8a69580e | 1532 | void ide_host_free(struct ide_host *host) |
151575e4 | 1533 | { |
8cdf3100 | 1534 | ide_hwif_t *hwif; |
151575e4 | 1535 | int i; |
8447d9d5 | 1536 | |
2bd24a1c | 1537 | ide_host_for_each_port(i, hwif, host) { |
9a100f4b BZ |
1538 | if (hwif) |
1539 | ide_port_free(hwif); | |
c97c6aca | 1540 | } |
151575e4 | 1541 | |
48c3c107 | 1542 | kfree(host); |
151575e4 | 1543 | } |
8a69580e BZ |
1544 | EXPORT_SYMBOL_GPL(ide_host_free); |
1545 | ||
1546 | void ide_host_remove(struct ide_host *host) | |
1547 | { | |
2bd24a1c | 1548 | ide_hwif_t *hwif; |
8a69580e BZ |
1549 | int i; |
1550 | ||
2bd24a1c BZ |
1551 | ide_host_for_each_port(i, hwif, host) { |
1552 | if (hwif) | |
1553 | ide_unregister(hwif); | |
8a69580e BZ |
1554 | } |
1555 | ||
1556 | ide_host_free(host); | |
1557 | } | |
48c3c107 | 1558 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1559 | |
1560 | void ide_port_scan(ide_hwif_t *hwif) | |
1561 | { | |
9fd91d95 | 1562 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1563 | ide_port_cable_detect(hwif); |
1564 | ide_port_init_devices(hwif); | |
1565 | ||
1566 | if (ide_probe_port(hwif) < 0) | |
1567 | return; | |
1568 | ||
1569 | hwif->present = 1; | |
1570 | ||
1571 | ide_port_tune_devices(hwif); | |
2dde7861 | 1572 | ide_port_setup_devices(hwif); |
e630fcbe | 1573 | ide_acpi_port_init_devices(hwif); |
2dde7861 BZ |
1574 | hwif_register_devices(hwif); |
1575 | ide_proc_port_register_devices(hwif); | |
1576 | } | |
1577 | EXPORT_SYMBOL_GPL(ide_port_scan); |