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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 | ||
1da177e4 LT |
104 | /** |
105 | * do_identify - identify a drive | |
106 | * @drive: drive to identify | |
107 | * @cmd: command used | |
108 | * | |
109 | * Called when we have issued a drive identify command to | |
110 | * read and parse the results. This function is run with | |
111 | * interrupts disabled. | |
112 | */ | |
047140ae BZ |
113 | |
114 | static void do_identify(ide_drive_t *drive, u8 cmd) | |
1da177e4 LT |
115 | { |
116 | ide_hwif_t *hwif = HWIF(drive); | |
4dde4492 BZ |
117 | u16 *id = drive->id; |
118 | char *m = (char *)&id[ATA_ID_PROD]; | |
94b9efdf | 119 | unsigned long flags; |
718c72e8 | 120 | int bswap = 1, is_cfa; |
1da177e4 | 121 | |
94b9efdf BZ |
122 | /* local CPU only; some systems need this */ |
123 | local_irq_save(flags); | |
1da177e4 | 124 | /* read 512 bytes of id info */ |
374e042c | 125 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
94b9efdf | 126 | local_irq_restore(flags); |
1da177e4 | 127 | |
97100fc8 | 128 | drive->dev_flags |= IDE_DFLAG_ID_READ; |
7b9f25b5 BZ |
129 | #ifdef DEBUG |
130 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
131 | ide_dump_identify((u8 *)id); | |
132 | #endif | |
1da177e4 LT |
133 | ide_fix_driveid(id); |
134 | ||
1da177e4 | 135 | /* |
aaaade3f BZ |
136 | * ATA_CMD_ID_ATA returns little-endian info, |
137 | * ATA_CMD_ID_ATAPI *usually* returns little-endian info. | |
1da177e4 | 138 | */ |
aaaade3f | 139 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 BZ |
140 | if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
141 | (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ | |
142 | (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ | |
1da177e4 | 143 | /* Vertos drives may still be weird */ |
4dde4492 | 144 | bswap ^= 1; |
1da177e4 | 145 | } |
4dde4492 BZ |
146 | |
147 | ide_fixstring(m, ATA_ID_PROD_LEN, bswap); | |
148 | ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); | |
149 | ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); | |
1da177e4 | 150 | |
699b052a | 151 | /* we depend on this a lot! */ |
4dde4492 | 152 | m[ATA_ID_PROD_LEN - 1] = '\0'; |
699b052a | 153 | |
4dde4492 | 154 | if (strstr(m, "E X A B Y T E N E S T")) |
1da177e4 LT |
155 | goto err_misc; |
156 | ||
4dde4492 | 157 | printk(KERN_INFO "%s: %s, ", drive->name, m); |
1b8ebad8 | 158 | |
97100fc8 BZ |
159 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
160 | drive->dev_flags &= ~IDE_DFLAG_DEAD; | |
1da177e4 LT |
161 | |
162 | /* | |
163 | * Check for an ATAPI device | |
164 | */ | |
aaaade3f | 165 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 | 166 | u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; |
1b8ebad8 BZ |
167 | |
168 | printk(KERN_CONT "ATAPI "); | |
1da177e4 LT |
169 | switch (type) { |
170 | case ide_floppy: | |
4dde4492 BZ |
171 | if (!strstr(m, "CD-ROM")) { |
172 | if (!strstr(m, "oppy") && | |
173 | !strstr(m, "poyp") && | |
174 | !strstr(m, "ZIP")) | |
1b8ebad8 | 175 | printk(KERN_CONT "cdrom or floppy?, assuming "); |
1da177e4 | 176 | if (drive->media != ide_cdrom) { |
1b8ebad8 | 177 | printk(KERN_CONT "FLOPPY"); |
97100fc8 | 178 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 LT |
179 | break; |
180 | } | |
181 | } | |
182 | /* Early cdrom models used zero */ | |
183 | type = ide_cdrom; | |
184 | case ide_cdrom: | |
97100fc8 | 185 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 LT |
186 | #ifdef CONFIG_PPC |
187 | /* kludge for Apple PowerBook internal zip */ | |
4dde4492 | 188 | if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { |
1b8ebad8 | 189 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
190 | type = ide_floppy; |
191 | break; | |
192 | } | |
193 | #endif | |
1b8ebad8 | 194 | printk(KERN_CONT "CD/DVD-ROM"); |
1da177e4 LT |
195 | break; |
196 | case ide_tape: | |
1b8ebad8 | 197 | printk(KERN_CONT "TAPE"); |
1da177e4 LT |
198 | break; |
199 | case ide_optical: | |
1b8ebad8 | 200 | printk(KERN_CONT "OPTICAL"); |
97100fc8 | 201 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 LT |
202 | break; |
203 | default: | |
1b8ebad8 | 204 | printk(KERN_CONT "UNKNOWN (type %d)", type); |
1da177e4 LT |
205 | break; |
206 | } | |
1b8ebad8 | 207 | printk(KERN_CONT " drive\n"); |
1da177e4 LT |
208 | drive->media = type; |
209 | /* an ATAPI device ignores DRDY */ | |
210 | drive->ready_stat = 0; | |
4ab3d502 BZ |
211 | if (ata_id_cdb_intr(id)) |
212 | drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; | |
42619d35 | 213 | drive->dev_flags |= IDE_DFLAG_DOORLOCKING; |
4abdc6ee EO |
214 | /* we don't do head unloading on ATAPI devices */ |
215 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
1da177e4 LT |
216 | return; |
217 | } | |
218 | ||
219 | /* | |
220 | * Not an ATAPI device: looks like a "regular" hard disk | |
221 | */ | |
98109337 | 222 | |
718c72e8 BZ |
223 | is_cfa = ata_id_is_cfa(id); |
224 | ||
225 | /* CF devices are *not* removable in Linux definition of the term */ | |
226 | if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) | |
97100fc8 | 227 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 | 228 | |
1da177e4 | 229 | drive->media = ide_disk; |
1b8ebad8 | 230 | |
4abdc6ee EO |
231 | if (!ata_id_has_unload(drive->id)) |
232 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
233 | ||
718c72e8 | 234 | printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA"); |
cd3dbc99 | 235 | |
1da177e4 LT |
236 | return; |
237 | ||
238 | err_misc: | |
239 | kfree(id); | |
97100fc8 | 240 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
241 | return; |
242 | } | |
243 | ||
244 | /** | |
245 | * actual_try_to_identify - send ata/atapi identify | |
246 | * @drive: drive to identify | |
247 | * @cmd: command to use | |
248 | * | |
249 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
250 | * and waits for a response. It also monitors irqs while this is | |
251 | * happening, in hope of automatically determining which one is | |
252 | * being used by the interface. | |
253 | * | |
254 | * Returns: 0 device was identified | |
255 | * 1 device timed-out (no response to identify request) | |
256 | * 2 device aborted the command (refused to identify itself) | |
257 | */ | |
258 | ||
259 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
260 | { | |
261 | ide_hwif_t *hwif = HWIF(drive); | |
4c3032d8 | 262 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 263 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 264 | int use_altstatus = 0, rc; |
1da177e4 LT |
265 | unsigned long timeout; |
266 | u8 s = 0, a = 0; | |
267 | ||
268 | /* take a deep breath */ | |
269 | msleep(50); | |
270 | ||
6636487e BZ |
271 | if (io_ports->ctl_addr && |
272 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { | |
374e042c BZ |
273 | a = tp_ops->read_altstatus(hwif); |
274 | s = tp_ops->read_status(hwif); | |
3a7d2484 | 275 | if ((a ^ s) & ~ATA_IDX) |
1da177e4 | 276 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
277 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
278 | "instead of ALTSTATUS(0x%02x)\n", | |
279 | drive->name, s, a); | |
280 | else | |
1da177e4 | 281 | /* use non-intrusive polling */ |
c47137a9 BZ |
282 | use_altstatus = 1; |
283 | } | |
1da177e4 LT |
284 | |
285 | /* set features register for atapi | |
286 | * identify command to be sure of reply | |
287 | */ | |
aaaade3f | 288 | if (cmd == ATA_CMD_ID_ATAPI) { |
4e65837b BZ |
289 | ide_task_t task; |
290 | ||
291 | memset(&task, 0, sizeof(task)); | |
292 | /* disable DMA & overlap */ | |
293 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
294 | ||
374e042c | 295 | tp_ops->tf_load(drive, &task); |
4e65837b | 296 | } |
1da177e4 LT |
297 | |
298 | /* ask drive for ID */ | |
374e042c | 299 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 300 | |
aaaade3f | 301 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
b163f46d BZ |
302 | |
303 | if (ide_busy_sleep(hwif, timeout, use_altstatus)) | |
304 | return 1; | |
1da177e4 | 305 | |
3a7d2484 | 306 | /* wait for IRQ and ATA_DRQ */ |
1da177e4 | 307 | msleep(50); |
374e042c | 308 | s = tp_ops->read_status(hwif); |
c47137a9 | 309 | |
3a7d2484 | 310 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
311 | /* drive returned ID */ |
312 | do_identify(drive, cmd); | |
313 | /* drive responded with ID */ | |
314 | rc = 0; | |
315 | /* clear drive IRQ */ | |
374e042c | 316 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
317 | } else { |
318 | /* drive refused ID */ | |
319 | rc = 2; | |
320 | } | |
321 | return rc; | |
322 | } | |
323 | ||
324 | /** | |
325 | * try_to_identify - try to identify a drive | |
326 | * @drive: drive to probe | |
327 | * @cmd: command to use | |
328 | * | |
329 | * Issue the identify command and then do IRQ probing to | |
330 | * complete the identification when needed by finding the | |
331 | * IRQ the drive is attached to | |
332 | */ | |
333 | ||
334 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
335 | { | |
336 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 337 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 LT |
338 | int retval; |
339 | int autoprobe = 0; | |
340 | unsigned long cookie = 0; | |
341 | ||
342 | /* | |
343 | * Disable device irq unless we need to | |
344 | * probe for it. Otherwise we'll get spurious | |
345 | * interrupts during the identify-phase that | |
346 | * the irq handler isn't expecting. | |
347 | */ | |
4c3032d8 | 348 | if (hwif->io_ports.ctl_addr) { |
1da177e4 LT |
349 | if (!hwif->irq) { |
350 | autoprobe = 1; | |
351 | cookie = probe_irq_on(); | |
1da177e4 | 352 | } |
374e042c | 353 | tp_ops->set_irq(hwif, autoprobe); |
1da177e4 LT |
354 | } |
355 | ||
356 | retval = actual_try_to_identify(drive, cmd); | |
357 | ||
358 | if (autoprobe) { | |
359 | int irq; | |
81ca6919 | 360 | |
374e042c | 361 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 362 | /* clear drive IRQ */ |
374e042c | 363 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
364 | udelay(5); |
365 | irq = probe_irq_off(cookie); | |
366 | if (!hwif->irq) { | |
367 | if (irq > 0) { | |
368 | hwif->irq = irq; | |
369 | } else { | |
370 | /* Mmmm.. multiple IRQs.. | |
371 | * don't know which was ours | |
372 | */ | |
1b8ebad8 | 373 | printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
1da177e4 LT |
374 | drive->name, cookie); |
375 | } | |
376 | } | |
377 | } | |
378 | return retval; | |
379 | } | |
380 | ||
b163f46d | 381 | int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) |
3a5015cc | 382 | { |
3a5015cc BZ |
383 | u8 stat; |
384 | ||
b163f46d BZ |
385 | timeout += jiffies; |
386 | ||
3a5015cc | 387 | do { |
b163f46d BZ |
388 | msleep(50); /* give drive a breather */ |
389 | stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) | |
390 | : hwif->tp_ops->read_status(hwif); | |
3a7d2484 | 391 | if ((stat & ATA_BUSY) == 0) |
3a5015cc BZ |
392 | return 0; |
393 | } while (time_before(jiffies, timeout)); | |
394 | ||
b163f46d | 395 | return 1; /* drive timed-out */ |
3a5015cc | 396 | } |
1da177e4 | 397 | |
1f2efb82 BZ |
398 | static u8 ide_read_device(ide_drive_t *drive) |
399 | { | |
400 | ide_task_t task; | |
401 | ||
402 | memset(&task, 0, sizeof(task)); | |
403 | task.tf_flags = IDE_TFLAG_IN_DEVICE; | |
404 | ||
374e042c | 405 | drive->hwif->tp_ops->tf_read(drive, &task); |
1f2efb82 BZ |
406 | |
407 | return task.tf.device; | |
408 | } | |
409 | ||
1da177e4 LT |
410 | /** |
411 | * do_probe - probe an IDE device | |
412 | * @drive: drive to probe | |
413 | * @cmd: command to use | |
414 | * | |
415 | * do_probe() has the difficult job of finding a drive if it exists, | |
416 | * without getting hung up if it doesn't exist, without trampling on | |
417 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
418 | * | |
419 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
420 | * but does not respond right away, the probe will "hang in there" | |
421 | * for the maximum wait time (about 30 seconds), otherwise it will | |
422 | * exit much more quickly. | |
423 | * | |
424 | * Returns: 0 device was identified | |
425 | * 1 device timed-out (no response to identify request) | |
426 | * 2 device aborted the command (refused to identify itself) | |
427 | * 3 bad status from device (possible for ATAPI drives) | |
428 | * 4 probe was not attempted because failure was obvious | |
429 | */ | |
430 | ||
431 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
432 | { | |
1da177e4 | 433 | ide_hwif_t *hwif = HWIF(drive); |
374e042c | 434 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 435 | int rc; |
97100fc8 BZ |
436 | u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
437 | ||
438 | /* avoid waiting for inappropriate probes */ | |
439 | if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) | |
440 | return 4; | |
1da177e4 | 441 | |
1da177e4 | 442 | #ifdef DEBUG |
1b8ebad8 | 443 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
97100fc8 | 444 | drive->name, present, drive->media, |
aaaade3f | 445 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
446 | #endif |
447 | ||
448 | /* needed for some systems | |
449 | * (e.g. crw9624 as drive0 with disk as slave) | |
450 | */ | |
451 | msleep(50); | |
452 | SELECT_DRIVE(drive); | |
453 | msleep(50); | |
1f2efb82 | 454 | |
7f612f27 | 455 | if (ide_read_device(drive) != drive->select && present == 0) { |
123995b9 | 456 | if (drive->dn & 1) { |
1da177e4 LT |
457 | /* exit with drive0 selected */ |
458 | SELECT_DRIVE(&hwif->drives[0]); | |
3a7d2484 | 459 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
460 | msleep(50); |
461 | } | |
462 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
463 | return 3; | |
464 | } | |
465 | ||
374e042c | 466 | stat = tp_ops->read_status(hwif); |
c47137a9 | 467 | |
3a7d2484 | 468 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
97100fc8 | 469 | present || cmd == ATA_CMD_ID_ATAPI) { |
1da177e4 LT |
470 | /* send cmd and wait */ |
471 | if ((rc = try_to_identify(drive, cmd))) { | |
472 | /* failed: try again */ | |
473 | rc = try_to_identify(drive,cmd); | |
474 | } | |
57b55275 | 475 | |
374e042c | 476 | stat = tp_ops->read_status(hwif); |
57b55275 | 477 | |
3a7d2484 | 478 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
479 | return 4; |
480 | ||
aaaade3f | 481 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
482 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
483 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 484 | msleep(50); |
e81a3bde | 485 | SELECT_DRIVE(drive); |
1da177e4 | 486 | msleep(50); |
aaaade3f | 487 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
b163f46d | 488 | (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); |
1da177e4 LT |
489 | rc = try_to_identify(drive, cmd); |
490 | } | |
57b55275 BZ |
491 | |
492 | /* ensure drive IRQ is clear */ | |
374e042c | 493 | stat = tp_ops->read_status(hwif); |
57b55275 | 494 | |
1da177e4 | 495 | if (rc == 1) |
57b55275 BZ |
496 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
497 | drive->name, stat); | |
1da177e4 LT |
498 | } else { |
499 | /* not present or maybe ATAPI */ | |
500 | rc = 3; | |
501 | } | |
123995b9 | 502 | if (drive->dn & 1) { |
1da177e4 LT |
503 | /* exit with drive0 selected */ |
504 | SELECT_DRIVE(&hwif->drives[0]); | |
505 | msleep(50); | |
506 | /* ensure drive irq is clear */ | |
374e042c | 507 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
508 | } |
509 | return rc; | |
510 | } | |
511 | ||
512 | /* | |
513 | * | |
514 | */ | |
515 | static void enable_nest (ide_drive_t *drive) | |
516 | { | |
517 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 518 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 519 | u8 stat; |
1da177e4 | 520 | |
4dde4492 BZ |
521 | printk(KERN_INFO "%s: enabling %s -- ", |
522 | hwif->name, (char *)&drive->id[ATA_ID_PROD]); | |
1b8ebad8 | 523 | |
1da177e4 LT |
524 | SELECT_DRIVE(drive); |
525 | msleep(50); | |
aaaade3f | 526 | tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); |
3a5015cc | 527 | |
b163f46d | 528 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { |
3a5015cc BZ |
529 | printk(KERN_CONT "failed (timeout)\n"); |
530 | return; | |
531 | } | |
1da177e4 LT |
532 | |
533 | msleep(50); | |
534 | ||
374e042c | 535 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
536 | |
537 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
538 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
539 | else | |
540 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
541 | } |
542 | ||
543 | /** | |
544 | * probe_for_drives - upper level drive probe | |
545 | * @drive: drive to probe for | |
546 | * | |
547 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
548 | * and presents things to the user as needed. | |
549 | * | |
550 | * Returns: 0 no device was found | |
97100fc8 BZ |
551 | * 1 device was found |
552 | * (note: IDE_DFLAG_PRESENT might still be not set) | |
1da177e4 | 553 | */ |
047140ae BZ |
554 | |
555 | static u8 probe_for_drive(ide_drive_t *drive) | |
1da177e4 | 556 | { |
4dde4492 BZ |
557 | char *m; |
558 | ||
1da177e4 LT |
559 | /* |
560 | * In order to keep things simple we have an id | |
561 | * block for all drives at all times. If the device | |
562 | * is pre ATA or refuses ATA/ATAPI identify we | |
563 | * will add faked data to this. | |
564 | * | |
565 | * Also note that 0 everywhere means "can't do X" | |
566 | */ | |
567 | ||
97100fc8 BZ |
568 | drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
569 | ||
151a6701 | 570 | drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); |
97100fc8 | 571 | if (drive->id == NULL) { |
1da177e4 LT |
572 | printk(KERN_ERR "ide: out of memory for id data.\n"); |
573 | return 0; | |
574 | } | |
4dde4492 BZ |
575 | |
576 | m = (char *)&drive->id[ATA_ID_PROD]; | |
577 | strcpy(m, "UNKNOWN"); | |
578 | ||
1da177e4 | 579 | /* skip probing? */ |
97100fc8 | 580 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
c36a7e98 | 581 | retry: |
1da177e4 | 582 | /* if !(success||timed-out) */ |
aaaade3f | 583 | if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) |
1da177e4 | 584 | /* look for ATAPI device */ |
aaaade3f | 585 | (void)do_probe(drive, ATA_CMD_ID_ATAPI); |
c36a7e98 | 586 | |
97100fc8 | 587 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
588 | /* drive not found */ |
589 | return 0; | |
4dde4492 | 590 | |
c36a7e98 | 591 | if (strstr(m, "E X A B Y T E N E S T")) { |
78595575 | 592 | enable_nest(drive); |
c36a7e98 BZ |
593 | goto retry; |
594 | } | |
595 | ||
1da177e4 | 596 | /* identification failed? */ |
97100fc8 | 597 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
598 | if (drive->media == ide_disk) { |
599 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
600 | drive->name, drive->cyl, | |
601 | drive->head, drive->sect); | |
602 | } else if (drive->media == ide_cdrom) { | |
603 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
604 | } else { | |
605 | /* nuke it */ | |
606 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
97100fc8 | 607 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
608 | } |
609 | } | |
610 | /* drive was found */ | |
611 | } | |
97100fc8 BZ |
612 | |
613 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 | 614 | return 0; |
97100fc8 | 615 | |
1da177e4 | 616 | /* The drive wasn't being helpful. Add generic info only */ |
97100fc8 | 617 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
618 | generic_id(drive); |
619 | return 1; | |
620 | } | |
621 | ||
622 | if (drive->media == ide_disk) { | |
623 | ide_disk_init_chs(drive); | |
624 | ide_disk_init_mult_count(drive); | |
625 | } | |
626 | ||
97100fc8 | 627 | return !!(drive->dev_flags & IDE_DFLAG_PRESENT); |
1da177e4 LT |
628 | } |
629 | ||
fc410698 | 630 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
631 | { |
632 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
633 | ||
f36d4024 | 634 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
635 | } |
636 | ||
f74c9141 | 637 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 638 | { |
349ae23f RD |
639 | int ret; |
640 | ||
1da177e4 | 641 | /* register with global device tree */ |
dc09c784 | 642 | dev_set_name(&hwif->gendev, hwif->name); |
1da177e4 LT |
643 | hwif->gendev.driver_data = hwif; |
644 | if (hwif->gendev.parent == NULL) { | |
36501650 BZ |
645 | if (hwif->dev) |
646 | hwif->gendev.parent = hwif->dev; | |
1da177e4 LT |
647 | else |
648 | /* Would like to do = &device_legacy */ | |
649 | hwif->gendev.parent = NULL; | |
650 | } | |
651 | hwif->gendev.release = hwif_release_dev; | |
349ae23f | 652 | ret = device_register(&hwif->gendev); |
f74c9141 | 653 | if (ret < 0) { |
349ae23f | 654 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 655 | __func__, ret); |
f74c9141 BZ |
656 | goto out; |
657 | } | |
658 | ||
3ee074bf GKH |
659 | hwif->portdev = device_create(ide_port_class, &hwif->gendev, |
660 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
661 | if (IS_ERR(hwif->portdev)) { |
662 | ret = PTR_ERR(hwif->portdev); | |
663 | device_unregister(&hwif->gendev); | |
664 | } | |
f74c9141 BZ |
665 | out: |
666 | return ret; | |
1da177e4 LT |
667 | } |
668 | ||
c860a8f2 BZ |
669 | /** |
670 | * ide_port_wait_ready - wait for port to become ready | |
671 | * @hwif: IDE port | |
672 | * | |
673 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
674 | * platforms. Typical cases are: | |
675 | * | |
676 | * - The firmware hard reset the disk before booting the kernel, | |
677 | * the drive is still doing it's poweron-reset sequence, that | |
678 | * can take up to 30 seconds. | |
679 | * | |
680 | * - The firmware does nothing (or no firmware), the device is | |
681 | * still in POST state (same as above actually). | |
682 | * | |
683 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
684 | * their reset sequence even when they are non-selected slave | |
685 | * devices, thus preventing discovery of the main HD. | |
686 | * | |
687 | * Doing this wait-for-non-busy should not harm any existing | |
688 | * configuration and fix some issues like the above. | |
689 | * | |
690 | * BenH. | |
691 | * | |
692 | * Returns 0 on success, error code (< 0) otherwise. | |
693 | */ | |
694 | ||
695 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 696 | { |
8266105b | 697 | int unit, rc; |
1da177e4 LT |
698 | |
699 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
700 | ||
701 | /* Let HW settle down a bit from whatever init state we | |
702 | * come from */ | |
703 | mdelay(2); | |
704 | ||
705 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
706 | * I know of at least one disk who takes 31 seconds, I use 35 | |
707 | * here to be safe | |
708 | */ | |
709 | rc = ide_wait_not_busy(hwif, 35000); | |
710 | if (rc) | |
711 | return rc; | |
712 | ||
713 | /* Now make sure both master & slave are ready */ | |
8266105b JS |
714 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
715 | ide_drive_t *drive = &hwif->drives[unit]; | |
716 | ||
717 | /* Ignore disks that we will not probe for later. */ | |
97100fc8 BZ |
718 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
719 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
8266105b | 720 | SELECT_DRIVE(drive); |
374e042c | 721 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
722 | mdelay(2); |
723 | rc = ide_wait_not_busy(hwif, 35000); | |
724 | if (rc) | |
725 | goto out; | |
726 | } else | |
727 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
728 | drive->name); | |
729 | } | |
730 | out: | |
1da177e4 | 731 | /* Exit function with master reselected (let's be sane) */ |
8266105b JS |
732 | if (unit) |
733 | SELECT_DRIVE(&hwif->drives[0]); | |
734 | ||
1da177e4 LT |
735 | return rc; |
736 | } | |
737 | ||
738 | /** | |
739 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 740 | * @dev1: slave device |
1da177e4 LT |
741 | * |
742 | * Analyse the drives on the interface and attempt to decide if we | |
743 | * have the same drive viewed twice. This occurs with crap CF adapters | |
744 | * and PCMCIA sometimes. | |
745 | */ | |
746 | ||
4dde4492 | 747 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 748 | { |
4dde4492 | 749 | ide_drive_t *dev0 = &dev1->hwif->drives[0]; |
1da177e4 | 750 | |
97100fc8 | 751 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
752 | return; |
753 | ||
754 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
755 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
756 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
757 | return; |
758 | ||
759 | /* Serial numbers do not match */ | |
4dde4492 BZ |
760 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
761 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
762 | return; |
763 | ||
764 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 765 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
766 | return; |
767 | ||
768 | /* Appears to be an IDE flash adapter with decode bugs */ | |
769 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
770 | ||
97100fc8 | 771 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
772 | } |
773 | ||
774 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
775 | ||
9d501529 | 776 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 777 | { |
1da177e4 LT |
778 | unsigned long flags; |
779 | unsigned int irqd; | |
a14dc574 BZ |
780 | int unit, rc = -ENODEV; |
781 | ||
782 | BUG_ON(hwif->present); | |
1da177e4 | 783 | |
97100fc8 BZ |
784 | if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && |
785 | (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 786 | return -EACCES; |
1da177e4 | 787 | |
1da177e4 LT |
788 | /* |
789 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
790 | * we'll install our IRQ driver much later... | |
791 | */ | |
792 | irqd = hwif->irq; | |
793 | if (irqd) | |
794 | disable_irq(hwif->irq); | |
795 | ||
796 | local_irq_set(flags); | |
797 | ||
c860a8f2 | 798 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
799 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
800 | ||
801 | /* | |
f367bed0 BZ |
802 | * Second drive should only exist if first drive was found, |
803 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 804 | */ |
f367bed0 | 805 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 | 806 | ide_drive_t *drive = &hwif->drives[unit]; |
123995b9 | 807 | |
1da177e4 | 808 | (void) probe_for_drive(drive); |
97100fc8 | 809 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 810 | rc = 0; |
1da177e4 | 811 | } |
e460a597 | 812 | |
1da177e4 | 813 | local_irq_restore(flags); |
e460a597 | 814 | |
1da177e4 LT |
815 | /* |
816 | * Use cached IRQ number. It might be (and is...) changed by probe | |
817 | * code above | |
818 | */ | |
819 | if (irqd) | |
820 | enable_irq(irqd); | |
821 | ||
a14dc574 | 822 | return rc; |
e84e7ea7 BZ |
823 | } |
824 | ||
825 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
826 | { | |
ac95beed | 827 | const struct ide_port_ops *port_ops = hwif->port_ops; |
e84e7ea7 BZ |
828 | int unit; |
829 | ||
f01393e4 BZ |
830 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
831 | ide_drive_t *drive = &hwif->drives[unit]; | |
832 | ||
97100fc8 BZ |
833 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
834 | if (port_ops && port_ops->quirkproc) | |
835 | port_ops->quirkproc(drive); | |
836 | } | |
f01393e4 | 837 | } |
0380dad4 | 838 | |
1da177e4 LT |
839 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
840 | ide_drive_t *drive = &hwif->drives[unit]; | |
841 | ||
97100fc8 | 842 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
207daeaa | 843 | ide_set_max_pio(drive); |
1da177e4 | 844 | |
97100fc8 | 845 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 846 | |
5e37bdc0 | 847 | if (hwif->dma_ops) |
8c0697cc | 848 | ide_set_dma(drive); |
1da177e4 LT |
849 | } |
850 | } | |
208a08f7 KG |
851 | |
852 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
853 | ide_drive_t *drive = &hwif->drives[unit]; | |
854 | ||
97100fc8 BZ |
855 | if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || |
856 | drive->id[ATA_ID_DWORD_IO]) | |
857 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
208a08f7 | 858 | else |
97100fc8 | 859 | drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; |
208a08f7 | 860 | } |
1da177e4 LT |
861 | } |
862 | ||
1da177e4 LT |
863 | /* |
864 | * init request queue | |
865 | */ | |
866 | static int ide_init_queue(ide_drive_t *drive) | |
867 | { | |
165125e1 | 868 | struct request_queue *q; |
1da177e4 LT |
869 | ide_hwif_t *hwif = HWIF(drive); |
870 | int max_sectors = 256; | |
871 | int max_sg_entries = PRD_ENTRIES; | |
872 | ||
873 | /* | |
874 | * Our default set up assumes the normal IDE case, | |
875 | * that is 64K segmenting, standard PRD setup | |
876 | * and LBA28. Some drivers then impose their own | |
877 | * limits and LBA48 we could raise it but as yet | |
878 | * do not. | |
879 | */ | |
1946089a | 880 | |
2a2ca6a9 BZ |
881 | q = blk_init_queue_node(do_ide_request, &hwif->hwgroup->lock, |
882 | hwif_to_node(hwif)); | |
1da177e4 LT |
883 | if (!q) |
884 | return 1; | |
885 | ||
886 | q->queuedata = drive; | |
887 | blk_queue_segment_boundary(q, 0xffff); | |
888 | ||
1da177e4 LT |
889 | if (hwif->rqsize < max_sectors) |
890 | max_sectors = hwif->rqsize; | |
891 | blk_queue_max_sectors(q, max_sectors); | |
892 | ||
893 | #ifdef CONFIG_PCI | |
894 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
895 | * creates segments that don't completely match our boundary | |
896 | * requirements and thus need to be broken up again. Because it | |
897 | * doesn't align properly either, we may actually have to break up | |
898 | * to more segments than what was we got in the first place, a max | |
899 | * worst case is twice as many. | |
900 | * This will be fixed once we teach pci_map_sg() about our boundary | |
901 | * requirements, hopefully soon. *FIXME* | |
902 | */ | |
903 | if (!PCI_DMA_BUS_IS_PHYS) | |
904 | max_sg_entries >>= 1; | |
905 | #endif /* CONFIG_PCI */ | |
906 | ||
907 | blk_queue_max_hw_segments(q, max_sg_entries); | |
908 | blk_queue_max_phys_segments(q, max_sg_entries); | |
909 | ||
910 | /* assign drive queue */ | |
911 | drive->queue = q; | |
912 | ||
913 | /* needs drive->queue to be set */ | |
914 | ide_toggle_bounce(drive, 1); | |
915 | ||
1da177e4 LT |
916 | return 0; |
917 | } | |
918 | ||
0947e0dc BZ |
919 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
920 | { | |
921 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
922 | ||
2a2ca6a9 | 923 | spin_lock_irq(&hwgroup->lock); |
0947e0dc BZ |
924 | if (!hwgroup->drive) { |
925 | /* first drive for hwgroup. */ | |
926 | drive->next = drive; | |
927 | hwgroup->drive = drive; | |
928 | hwgroup->hwif = HWIF(hwgroup->drive); | |
929 | } else { | |
930 | drive->next = hwgroup->drive->next; | |
931 | hwgroup->drive->next = drive; | |
932 | } | |
2a2ca6a9 | 933 | spin_unlock_irq(&hwgroup->lock); |
0947e0dc BZ |
934 | } |
935 | ||
d5bc6592 BZ |
936 | /* |
937 | * For any present drive: | |
938 | * - allocate the block device queue | |
939 | * - link drive into the hwgroup | |
940 | */ | |
e415e495 | 941 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 942 | { |
e415e495 | 943 | int i, j = 0; |
d5bc6592 | 944 | |
26042d05 | 945 | mutex_lock(&ide_cfg_mtx); |
d5bc6592 BZ |
946 | for (i = 0; i < MAX_DRIVES; i++) { |
947 | ide_drive_t *drive = &hwif->drives[i]; | |
948 | ||
97100fc8 | 949 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
d5bc6592 BZ |
950 | continue; |
951 | ||
952 | if (ide_init_queue(drive)) { | |
953 | printk(KERN_ERR "ide: failed to init %s\n", | |
954 | drive->name); | |
e415e495 EO |
955 | kfree(drive->id); |
956 | drive->id = NULL; | |
957 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; | |
d5bc6592 BZ |
958 | continue; |
959 | } | |
960 | ||
e415e495 EO |
961 | j++; |
962 | ||
d5bc6592 BZ |
963 | ide_add_drive_to_hwgroup(drive); |
964 | } | |
26042d05 | 965 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
966 | |
967 | return j; | |
d5bc6592 BZ |
968 | } |
969 | ||
af1cbba3 BZ |
970 | static ide_hwif_t *ide_ports[MAX_HWIFS]; |
971 | ||
6059143a BZ |
972 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
973 | { | |
974 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
975 | ||
af1cbba3 BZ |
976 | ide_ports[hwif->index] = NULL; |
977 | ||
2a2ca6a9 | 978 | spin_lock_irq(&hwgroup->lock); |
6059143a BZ |
979 | /* |
980 | * Remove us from the hwgroup, and free | |
981 | * the hwgroup if we were the only member | |
982 | */ | |
983 | if (hwif->next == hwif) { | |
984 | BUG_ON(hwgroup->hwif != hwif); | |
985 | kfree(hwgroup); | |
986 | } else { | |
987 | /* There is another interface in hwgroup. | |
988 | * Unlink us, and set hwgroup->drive and ->hwif to | |
989 | * something sane. | |
990 | */ | |
991 | ide_hwif_t *g = hwgroup->hwif; | |
992 | ||
993 | while (g->next != hwif) | |
994 | g = g->next; | |
995 | g->next = hwif->next; | |
996 | if (hwgroup->hwif == hwif) { | |
997 | /* Chose a random hwif for hwgroup->hwif. | |
998 | * It's guaranteed that there are no drives | |
999 | * left in the hwgroup. | |
1000 | */ | |
1001 | BUG_ON(hwgroup->drive != NULL); | |
1002 | hwgroup->hwif = g; | |
1003 | } | |
1004 | BUG_ON(hwgroup->hwif == hwif); | |
1005 | } | |
2a2ca6a9 | 1006 | spin_unlock_irq(&hwgroup->lock); |
6059143a BZ |
1007 | } |
1008 | ||
1da177e4 LT |
1009 | /* |
1010 | * This routine sets up the irq for an ide interface, and creates a new | |
1011 | * hwgroup for the irq/hwif if none was previously assigned. | |
1012 | * | |
1013 | * Much of the code is for correctly detecting/handling irq sharing | |
1014 | * and irq serialization situations. This is somewhat complex because | |
1015 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
1016 | */ |
1017 | static int init_irq (ide_hwif_t *hwif) | |
1018 | { | |
4c3032d8 | 1019 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1da177e4 LT |
1020 | unsigned int index; |
1021 | ide_hwgroup_t *hwgroup; | |
1022 | ide_hwif_t *match = NULL; | |
1023 | ||
ef29888e | 1024 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 1025 | hwif->hwgroup = NULL; |
75d21fff | 1026 | |
1da177e4 | 1027 | for (index = 0; index < MAX_HWIFS; index++) { |
af1cbba3 BZ |
1028 | ide_hwif_t *h = ide_ports[index]; |
1029 | ||
1030 | if (h && h->hwgroup) { /* scan only initialized ports */ | |
702c026b BZ |
1031 | if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE) { |
1032 | if (hwif->host == h->host) | |
1033 | match = h; | |
1da177e4 LT |
1034 | } |
1035 | } | |
1036 | } | |
75d21fff | 1037 | |
1da177e4 LT |
1038 | /* |
1039 | * If we are still without a hwgroup, then form a new one | |
1040 | */ | |
1041 | if (match) { | |
1042 | hwgroup = match->hwgroup; | |
1043 | hwif->hwgroup = hwgroup; | |
1044 | /* | |
1045 | * Link us into the hwgroup. | |
1046 | * This must be done early, do ensure that unexpected_intr | |
1047 | * can find the hwif and prevent irq storms. | |
1048 | * No drives are attached to the new hwif, choose_drive | |
1049 | * can't do anything stupid (yet). | |
1050 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1051 | * linked list, the first entry is the hwif that owns | |
1052 | * hwgroup->handler - do not change that. | |
1053 | */ | |
2a2ca6a9 | 1054 | spin_lock_irq(&hwgroup->lock); |
1da177e4 LT |
1055 | hwif->next = hwgroup->hwif->next; |
1056 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1057 | BUG_ON(hwif->next == hwif); |
2a2ca6a9 | 1058 | spin_unlock_irq(&hwgroup->lock); |
1da177e4 | 1059 | } else { |
422278ef BZ |
1060 | hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, |
1061 | hwif_to_node(hwif)); | |
1062 | if (hwgroup == NULL) | |
1063 | goto out_up; | |
1da177e4 | 1064 | |
2a2ca6a9 BZ |
1065 | spin_lock_init(&hwgroup->lock); |
1066 | ||
1da177e4 | 1067 | hwif->hwgroup = hwgroup; |
422278ef | 1068 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1069 | |
1da177e4 LT |
1070 | init_timer(&hwgroup->timer); |
1071 | hwgroup->timer.function = &ide_timer_expiry; | |
1072 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1073 | } | |
1074 | ||
af1cbba3 BZ |
1075 | ide_ports[hwif->index] = hwif; |
1076 | ||
1da177e4 LT |
1077 | /* |
1078 | * Allocate the irq, if not already obtained for another hwif | |
1079 | */ | |
1080 | if (!match || match->irq != hwif->irq) { | |
7b5da4be | 1081 | int sa = 0; |
7b892806 | 1082 | #if defined(__mc68000__) |
362537b9 | 1083 | sa = IRQF_SHARED; |
e1771e20 | 1084 | #endif /* __mc68000__ */ |
1da177e4 | 1085 | |
6b5cde36 | 1086 | if (hwif->chipset == ide_pci) |
362537b9 | 1087 | sa = IRQF_SHARED; |
1da177e4 | 1088 | |
4c3032d8 | 1089 | if (io_ports->ctl_addr) |
374e042c | 1090 | hwif->tp_ops->set_irq(hwif, 1); |
1da177e4 LT |
1091 | |
1092 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1093 | goto out_unlink; | |
1094 | } | |
1095 | ||
8a0e7e14 BZ |
1096 | if (!hwif->rqsize) { |
1097 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1098 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1099 | hwif->rqsize = 256; | |
1100 | else | |
1101 | hwif->rqsize = 65536; | |
1102 | } | |
1103 | ||
7b892806 | 1104 | #if !defined(__mc68000__) |
1b8ebad8 | 1105 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
1106 | io_ports->data_addr, io_ports->status_addr, |
1107 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 1108 | #else |
1b8ebad8 | 1109 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 1110 | io_ports->data_addr, hwif->irq); |
7b892806 | 1111 | #endif /* __mc68000__ */ |
1da177e4 | 1112 | if (match) |
f58c1ab8 | 1113 | printk(KERN_CONT " (serialized with %s)", match->name); |
1b8ebad8 | 1114 | printk(KERN_CONT "\n"); |
d5bc6592 | 1115 | |
ef29888e | 1116 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1117 | return 0; |
1118 | out_unlink: | |
fbd13088 | 1119 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1120 | out_up: |
ef29888e | 1121 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1122 | return 1; |
1123 | } | |
1124 | ||
1125 | static int ata_lock(dev_t dev, void *data) | |
1126 | { | |
1127 | /* FIXME: we want to pin hwif down */ | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1132 | { | |
1133 | ide_hwif_t *hwif = data; | |
1134 | int unit = *part >> PARTN_BITS; | |
1135 | ide_drive_t *drive = &hwif->drives[unit]; | |
97100fc8 BZ |
1136 | |
1137 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
1138 | return NULL; |
1139 | ||
1140 | if (drive->media == ide_disk) | |
1141 | request_module("ide-disk"); | |
97100fc8 | 1142 | if (drive->dev_flags & IDE_DFLAG_SCSI) |
1da177e4 LT |
1143 | request_module("ide-scsi"); |
1144 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1145 | request_module("ide-cd"); | |
1146 | if (drive->media == ide_tape) | |
1147 | request_module("ide-tape"); | |
1148 | if (drive->media == ide_floppy) | |
1149 | request_module("ide-floppy"); | |
1150 | ||
1151 | return NULL; | |
1152 | } | |
1153 | ||
1154 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1155 | { | |
1156 | struct gendisk *p = data; | |
1157 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 1158 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | static int exact_lock(dev_t dev, void *data) | |
1162 | { | |
1163 | struct gendisk *p = data; | |
1164 | ||
1165 | if (!get_disk(p)) | |
1166 | return -1; | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | void ide_register_region(struct gendisk *disk) | |
1171 | { | |
1172 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1173 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1174 | } | |
1175 | ||
1176 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1177 | ||
1178 | void ide_unregister_region(struct gendisk *disk) | |
1179 | { | |
1180 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1181 | disk->minors); | |
1182 | } | |
1183 | ||
1184 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1185 | ||
1186 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1187 | { | |
1188 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 1189 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
1190 | |
1191 | disk->major = hwif->major; | |
1192 | disk->first_minor = unit << PARTN_BITS; | |
1193 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1194 | disk->queue = drive->queue; | |
1195 | } | |
1196 | ||
1197 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1198 | ||
8604affd BZ |
1199 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1200 | { | |
1201 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1202 | ||
1203 | if (drive == drive->next) { | |
1204 | /* special case: last drive from hwgroup. */ | |
1205 | BUG_ON(hwgroup->drive != drive); | |
1206 | hwgroup->drive = NULL; | |
1207 | } else { | |
1208 | ide_drive_t *walk; | |
1209 | ||
1210 | walk = hwgroup->drive; | |
1211 | while (walk->next != drive) | |
1212 | walk = walk->next; | |
1213 | walk->next = drive->next; | |
1214 | if (hwgroup->drive == drive) { | |
1215 | hwgroup->drive = drive->next; | |
1216 | hwgroup->hwif = hwgroup->drive->hwif; | |
1217 | } | |
1218 | } | |
1219 | BUG_ON(hwgroup->drive == drive); | |
1220 | } | |
1221 | ||
1da177e4 LT |
1222 | static void drive_release_dev (struct device *dev) |
1223 | { | |
1224 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
2a2ca6a9 | 1225 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; |
1da177e4 | 1226 | |
5b0c4b30 BZ |
1227 | ide_proc_unregister_device(drive); |
1228 | ||
2a2ca6a9 | 1229 | spin_lock_irq(&hwgroup->lock); |
8604affd | 1230 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1231 | kfree(drive->id); |
1232 | drive->id = NULL; | |
97100fc8 | 1233 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 1234 | /* Messed up locking ... */ |
2a2ca6a9 | 1235 | spin_unlock_irq(&hwgroup->lock); |
8604affd | 1236 | blk_cleanup_queue(drive->queue); |
2a2ca6a9 | 1237 | spin_lock_irq(&hwgroup->lock); |
8604affd | 1238 | drive->queue = NULL; |
2a2ca6a9 | 1239 | spin_unlock_irq(&hwgroup->lock); |
8604affd | 1240 | |
f36d4024 | 1241 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1242 | } |
1243 | ||
1da177e4 LT |
1244 | static int hwif_init(ide_hwif_t *hwif) |
1245 | { | |
1246 | int old_irq; | |
1247 | ||
1da177e4 | 1248 | if (!hwif->irq) { |
a861beb1 | 1249 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1250 | if (!hwif->irq) { |
1b8ebad8 | 1251 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
48535651 | 1252 | return 0; |
1da177e4 LT |
1253 | } |
1254 | } | |
1da177e4 | 1255 | |
1da177e4 LT |
1256 | if (register_blkdev(hwif->major, hwif->name)) |
1257 | return 0; | |
1258 | ||
1259 | if (!hwif->sg_max_nents) | |
1260 | hwif->sg_max_nents = PRD_ENTRIES; | |
1261 | ||
45711f1a | 1262 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1263 | GFP_KERNEL); |
1264 | if (!hwif->sg_table) { | |
1265 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1266 | goto out; | |
1267 | } | |
45711f1a JA |
1268 | |
1269 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1270 | |
1271 | if (init_irq(hwif) == 0) | |
1272 | goto done; | |
1273 | ||
1274 | old_irq = hwif->irq; | |
1275 | /* | |
1276 | * It failed to initialise. Find the default IRQ for | |
1277 | * this port and try that. | |
1278 | */ | |
a861beb1 | 1279 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1280 | if (!hwif->irq) { |
1b8ebad8 | 1281 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1da177e4 LT |
1282 | hwif->name, old_irq); |
1283 | goto out; | |
1284 | } | |
1285 | if (init_irq(hwif)) { | |
1b8ebad8 | 1286 | printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
1da177e4 LT |
1287 | hwif->name, old_irq, hwif->irq); |
1288 | goto out; | |
1289 | } | |
1b8ebad8 | 1290 | printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
1da177e4 LT |
1291 | hwif->name, hwif->irq); |
1292 | ||
1293 | done: | |
3a4e7c96 BZ |
1294 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1295 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1296 | return 1; |
1297 | ||
1298 | out: | |
1299 | unregister_blkdev(hwif->major, hwif->name); | |
1300 | return 0; | |
1301 | } | |
1302 | ||
9601a607 BZ |
1303 | static void hwif_register_devices(ide_hwif_t *hwif) |
1304 | { | |
1305 | unsigned int i; | |
1306 | ||
1307 | for (i = 0; i < MAX_DRIVES; i++) { | |
1308 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1309 | struct device *dev = &drive->gendev; |
1310 | int ret; | |
9601a607 | 1311 | |
97100fc8 | 1312 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
c5d70cc7 | 1313 | continue; |
9601a607 | 1314 | |
dc09c784 | 1315 | dev_set_name(dev, "%u.%u", hwif->index, i); |
c5d70cc7 BZ |
1316 | dev->parent = &hwif->gendev; |
1317 | dev->bus = &ide_bus_type; | |
1318 | dev->driver_data = drive; | |
1319 | dev->release = drive_release_dev; | |
1320 | ||
1321 | ret = device_register(dev); | |
1322 | if (ret < 0) | |
1323 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1324 | "%d\n", __func__, ret); | |
9601a607 BZ |
1325 | } |
1326 | } | |
1327 | ||
7704ca2a BZ |
1328 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1329 | { | |
ac95beed | 1330 | const struct ide_port_ops *port_ops = hwif->port_ops; |
7704ca2a BZ |
1331 | int i; |
1332 | ||
1333 | for (i = 0; i < MAX_DRIVES; i++) { | |
1334 | ide_drive_t *drive = &hwif->drives[i]; | |
1335 | ||
123995b9 BZ |
1336 | drive->dn = i + hwif->channel * 2; |
1337 | ||
7704ca2a BZ |
1338 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1339 | drive->io_32bit = 1; | |
1340 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
97100fc8 | 1341 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1342 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1343 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1344 | |
e6d95bd1 BZ |
1345 | if (port_ops && port_ops->init_dev) |
1346 | port_ops->init_dev(drive); | |
1347 | } | |
7704ca2a BZ |
1348 | } |
1349 | ||
c413b9b9 BZ |
1350 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1351 | const struct ide_port_info *d) | |
8447d9d5 | 1352 | { |
b7691646 | 1353 | hwif->channel = port; |
c413b9b9 BZ |
1354 | |
1355 | if (d->chipset) | |
1356 | hwif->chipset = d->chipset; | |
1357 | ||
1358 | if (d->init_iops) | |
1359 | d->init_iops(hwif); | |
1360 | ||
c413b9b9 BZ |
1361 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
1362 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1363 | hwif->irq = port ? 15 : 14; | |
1364 | ||
23f8e4bf BZ |
1365 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1366 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1367 | hwif->pio_mask = d->pio_mask; |
1368 | ||
374e042c BZ |
1369 | if (d->tp_ops) |
1370 | hwif->tp_ops = d->tp_ops; | |
1371 | ||
ac95beed BZ |
1372 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1373 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1374 | hwif->port_ops = d->port_ops; | |
1375 | ||
c413b9b9 BZ |
1376 | hwif->swdma_mask = d->swdma_mask; |
1377 | hwif->mwdma_mask = d->mwdma_mask; | |
1378 | hwif->ultra_mask = d->udma_mask; | |
1379 | ||
b123f56e BZ |
1380 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1381 | int rc; | |
1382 | ||
1383 | if (d->init_dma) | |
1384 | rc = d->init_dma(hwif, d); | |
1385 | else | |
1386 | rc = ide_hwif_setup_dma(hwif, d); | |
1387 | ||
1388 | if (rc < 0) { | |
1389 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
ebb00fb5 | 1390 | hwif->dma_base = 0; |
b123f56e BZ |
1391 | hwif->swdma_mask = 0; |
1392 | hwif->mwdma_mask = 0; | |
1393 | hwif->ultra_mask = 0; | |
5e37bdc0 BZ |
1394 | } else if (d->dma_ops) |
1395 | hwif->dma_ops = d->dma_ops; | |
b123f56e | 1396 | } |
c413b9b9 | 1397 | |
1024c5f4 | 1398 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
702c026b BZ |
1399 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) |
1400 | hwif->host->host_flags |= IDE_HFLAG_SERIALIZE; | |
1024c5f4 | 1401 | |
6b492496 BZ |
1402 | if (d->max_sectors) |
1403 | hwif->rqsize = d->max_sectors; | |
c413b9b9 BZ |
1404 | |
1405 | /* call chipset specific routine for each enabled port */ | |
1406 | if (d->init_hwif) | |
1407 | d->init_hwif(hwif); | |
c7f6f21a | 1408 | } |
bfa14b42 | 1409 | |
c7f6f21a BZ |
1410 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1411 | { | |
ac95beed BZ |
1412 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1413 | ||
1414 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1415 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1416 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1417 | } |
c413b9b9 BZ |
1418 | } |
1419 | ||
f74c9141 BZ |
1420 | static ssize_t store_delete_devices(struct device *portdev, |
1421 | struct device_attribute *attr, | |
1422 | const char *buf, size_t n) | |
1423 | { | |
1424 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1425 | ||
1426 | if (strncmp(buf, "1", n)) | |
1427 | return -EINVAL; | |
1428 | ||
1429 | ide_port_unregister_devices(hwif); | |
1430 | ||
1431 | return n; | |
1432 | }; | |
1433 | ||
1434 | static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); | |
1435 | ||
1436 | static ssize_t store_scan(struct device *portdev, | |
1437 | struct device_attribute *attr, | |
1438 | const char *buf, size_t n) | |
1439 | { | |
1440 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1441 | ||
1442 | if (strncmp(buf, "1", n)) | |
1443 | return -EINVAL; | |
1444 | ||
1445 | ide_port_unregister_devices(hwif); | |
1446 | ide_port_scan(hwif); | |
1447 | ||
1448 | return n; | |
1449 | }; | |
1450 | ||
1451 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
1452 | ||
1453 | static struct device_attribute *ide_port_attrs[] = { | |
1454 | &dev_attr_delete_devices, | |
1455 | &dev_attr_scan, | |
1456 | NULL | |
1457 | }; | |
1458 | ||
1459 | static int ide_sysfs_register_port(ide_hwif_t *hwif) | |
1460 | { | |
ca09a237 | 1461 | int i, uninitialized_var(rc); |
f74c9141 BZ |
1462 | |
1463 | for (i = 0; ide_port_attrs[i]; i++) { | |
1464 | rc = device_create_file(hwif->portdev, ide_port_attrs[i]); | |
1465 | if (rc) | |
1466 | break; | |
1467 | } | |
1468 | ||
1469 | return rc; | |
1470 | } | |
1471 | ||
8cdf3100 BZ |
1472 | static unsigned int ide_indexes; |
1473 | ||
fe80b937 | 1474 | /** |
8cdf3100 | 1475 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1476 | * @d: IDE port info |
1477 | * | |
8cdf3100 | 1478 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1479 | */ |
1480 | ||
8cdf3100 | 1481 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1482 | { |
8cdf3100 | 1483 | int idx = -ENOENT; |
fe80b937 | 1484 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1485 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1486 | |
1487 | /* | |
1488 | * Claim an unassigned slot. | |
1489 | * | |
1490 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1491 | * just in case there's another interface yet-to-be-scanned | |
1492 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1493 | * | |
1494 | * Unless there is a bootable card that does not use the standard | |
1495 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1496 | */ | |
8cdf3100 | 1497 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1498 | if (bootable) { |
1499 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1500 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1501 | } else { |
75d21fff BZ |
1502 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1503 | idx = ffz(ide_indexes | 3); | |
1504 | else if ((ide_indexes & 3) != 3) | |
1505 | idx = ffz(ide_indexes); | |
fe80b937 | 1506 | } |
8cdf3100 BZ |
1507 | if (idx >= 0) |
1508 | ide_indexes |= (1 << idx); | |
1509 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1510 | |
8cdf3100 BZ |
1511 | return idx; |
1512 | } | |
256c5f8e | 1513 | |
8cdf3100 BZ |
1514 | static void ide_free_port_slot(int idx) |
1515 | { | |
1516 | mutex_lock(&ide_cfg_mtx); | |
1517 | ide_indexes &= ~(1 << idx); | |
1518 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1519 | } |
fe80b937 | 1520 | |
a36223b0 | 1521 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
48c3c107 BZ |
1522 | { |
1523 | struct ide_host *host; | |
1524 | int i; | |
1525 | ||
1526 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
1527 | if (host == NULL) | |
1528 | return NULL; | |
1529 | ||
a36223b0 | 1530 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
48c3c107 | 1531 | ide_hwif_t *hwif; |
8cdf3100 | 1532 | int idx; |
48c3c107 BZ |
1533 | |
1534 | if (hws[i] == NULL) | |
1535 | continue; | |
1536 | ||
18de1017 BZ |
1537 | hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); |
1538 | if (hwif == NULL) | |
1539 | continue; | |
1540 | ||
8cdf3100 BZ |
1541 | idx = ide_find_port_slot(d); |
1542 | if (idx < 0) { | |
1543 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1544 | d ? d->name : "ide"); | |
18de1017 | 1545 | kfree(hwif); |
8cdf3100 | 1546 | continue; |
48c3c107 | 1547 | } |
8cdf3100 | 1548 | |
8cdf3100 BZ |
1549 | ide_init_port_data(hwif, idx); |
1550 | ||
08da591e BZ |
1551 | hwif->host = host; |
1552 | ||
8cdf3100 BZ |
1553 | host->ports[i] = hwif; |
1554 | host->n_ports++; | |
48c3c107 BZ |
1555 | } |
1556 | ||
1557 | if (host->n_ports == 0) { | |
1558 | kfree(host); | |
1559 | return NULL; | |
1560 | } | |
1561 | ||
6cdf6eb3 BZ |
1562 | if (hws[0]) |
1563 | host->dev[0] = hws[0]->dev; | |
1564 | ||
feb22b7f BZ |
1565 | if (d) { |
1566 | host->init_chipset = d->init_chipset; | |
ef0b0427 | 1567 | host->host_flags = d->host_flags; |
feb22b7f | 1568 | } |
ef0b0427 | 1569 | |
48c3c107 BZ |
1570 | return host; |
1571 | } | |
48c3c107 BZ |
1572 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1573 | ||
1574 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, | |
1575 | hw_regs_t **hws) | |
c413b9b9 BZ |
1576 | { |
1577 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1578 | int i, j = 0; |
8447d9d5 | 1579 | |
a36223b0 | 1580 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1581 | hwif = host->ports[i]; |
48c3c107 | 1582 | |
e0d00207 | 1583 | if (hwif == NULL) { |
c413b9b9 BZ |
1584 | mate = NULL; |
1585 | continue; | |
1586 | } | |
1587 | ||
c97c6aca | 1588 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1589 | ide_port_apply_params(hwif); |
1590 | ||
1591 | if (d == NULL) { | |
1592 | mate = NULL; | |
123995b9 BZ |
1593 | } else { |
1594 | if ((i & 1) && mate) { | |
1595 | hwif->mate = mate; | |
1596 | mate->mate = hwif; | |
1597 | } | |
9fd91d95 | 1598 | |
123995b9 | 1599 | mate = (i & 1) ? NULL : hwif; |
c413b9b9 | 1600 | |
123995b9 BZ |
1601 | ide_init_port(hwif, i & 1, d); |
1602 | ide_port_cable_detect(hwif); | |
1603 | } | |
c413b9b9 | 1604 | |
7704ca2a | 1605 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1606 | } |
1607 | ||
a36223b0 | 1608 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1609 | hwif = host->ports[i]; |
ba6560aa | 1610 | |
e0d00207 BZ |
1611 | if (hwif == NULL) |
1612 | continue; | |
139ddfca | 1613 | |
eb716beb BZ |
1614 | if (ide_probe_port(hwif) == 0) |
1615 | hwif->present = 1; | |
a14dc574 BZ |
1616 | |
1617 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1618 | !hwif->mate->present) | |
1619 | ide_register_port(hwif); | |
1620 | ||
eb716beb BZ |
1621 | if (hwif->present) |
1622 | ide_port_tune_devices(hwif); | |
2e13093a | 1623 | } |
ba6560aa | 1624 | |
a36223b0 | 1625 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1626 | hwif = host->ports[i]; |
2e13093a | 1627 | |
e0d00207 BZ |
1628 | if (hwif == NULL) |
1629 | continue; | |
ba6560aa BZ |
1630 | |
1631 | if (hwif_init(hwif) == 0) { | |
1632 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1633 | "interface\n", hwif->name); | |
48535651 | 1634 | hwif->present = 0; |
ba6560aa BZ |
1635 | continue; |
1636 | } | |
decdc3f0 | 1637 | |
eb716beb | 1638 | if (hwif->present) |
e415e495 EO |
1639 | if (ide_port_setup_devices(hwif) == 0) { |
1640 | hwif->present = 0; | |
1641 | continue; | |
1642 | } | |
1643 | ||
1644 | j++; | |
26042d05 | 1645 | |
decdc3f0 | 1646 | ide_acpi_init(hwif); |
eb716beb BZ |
1647 | |
1648 | if (hwif->present) | |
1649 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1650 | } |
1651 | ||
a36223b0 | 1652 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1653 | hwif = host->ports[i]; |
2e13093a | 1654 | |
e0d00207 BZ |
1655 | if (hwif == NULL) |
1656 | continue; | |
ba6560aa | 1657 | |
eb716beb | 1658 | if (hwif->present) |
ba6560aa | 1659 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1660 | } |
1661 | ||
a36223b0 | 1662 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1663 | hwif = host->ports[i]; |
327617e1 | 1664 | |
e0d00207 BZ |
1665 | if (hwif == NULL) |
1666 | continue; | |
327617e1 | 1667 | |
eb716beb BZ |
1668 | ide_sysfs_register_port(hwif); |
1669 | ide_proc_register_port(hwif); | |
1670 | ||
1671 | if (hwif->present) | |
d9270a3f | 1672 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1673 | } |
1674 | ||
e0d00207 | 1675 | return j ? 0 : -1; |
8447d9d5 | 1676 | } |
48c3c107 | 1677 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1678 | |
6f904d01 BZ |
1679 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1680 | struct ide_host **hostp) | |
1681 | { | |
1682 | struct ide_host *host; | |
8a69580e | 1683 | int rc; |
6f904d01 BZ |
1684 | |
1685 | host = ide_host_alloc(d, hws); | |
1686 | if (host == NULL) | |
1687 | return -ENOMEM; | |
1688 | ||
8a69580e BZ |
1689 | rc = ide_host_register(host, d, hws); |
1690 | if (rc) { | |
1691 | ide_host_free(host); | |
1692 | return rc; | |
1693 | } | |
6f904d01 BZ |
1694 | |
1695 | if (hostp) | |
1696 | *hostp = host; | |
1697 | ||
1698 | return 0; | |
1699 | } | |
1700 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1701 | ||
8a69580e | 1702 | void ide_host_free(struct ide_host *host) |
151575e4 | 1703 | { |
8cdf3100 | 1704 | ide_hwif_t *hwif; |
151575e4 | 1705 | int i; |
8447d9d5 | 1706 | |
a36223b0 | 1707 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
8cdf3100 BZ |
1708 | hwif = host->ports[i]; |
1709 | ||
1710 | if (hwif == NULL) | |
1711 | continue; | |
1712 | ||
8cdf3100 | 1713 | ide_free_port_slot(hwif->index); |
18de1017 | 1714 | kfree(hwif); |
c97c6aca | 1715 | } |
151575e4 | 1716 | |
48c3c107 | 1717 | kfree(host); |
151575e4 | 1718 | } |
8a69580e BZ |
1719 | EXPORT_SYMBOL_GPL(ide_host_free); |
1720 | ||
1721 | void ide_host_remove(struct ide_host *host) | |
1722 | { | |
1723 | int i; | |
1724 | ||
a36223b0 | 1725 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
8a69580e BZ |
1726 | if (host->ports[i]) |
1727 | ide_unregister(host->ports[i]); | |
1728 | } | |
1729 | ||
1730 | ide_host_free(host); | |
1731 | } | |
48c3c107 | 1732 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1733 | |
1734 | void ide_port_scan(ide_hwif_t *hwif) | |
1735 | { | |
9fd91d95 | 1736 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1737 | ide_port_cable_detect(hwif); |
1738 | ide_port_init_devices(hwif); | |
1739 | ||
1740 | if (ide_probe_port(hwif) < 0) | |
1741 | return; | |
1742 | ||
1743 | hwif->present = 1; | |
1744 | ||
1745 | ide_port_tune_devices(hwif); | |
1746 | ide_acpi_port_init_devices(hwif); | |
1747 | ide_port_setup_devices(hwif); | |
1748 | hwif_register_devices(hwif); | |
1749 | ide_proc_port_register_devices(hwif); | |
1750 | } | |
1751 | EXPORT_SYMBOL_GPL(ide_port_scan); |