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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01002 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 */
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 *
Bartlomiej Zolnierkiewiczbbe4d6d2007-12-12 23:32:00 +010015 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
16 * by Andrea Arcangeli
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#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>
FUJITA Tomonoridc817852007-10-23 09:29:58 +020035#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37#include <asm/byteorder.h>
38#include <asm/irq.h>
39#include <asm/uaccess.h>
40#include <asm/io.h>
41
Bartlomiej Zolnierkiewicz63b51c62008-07-16 20:33:40 +020042static ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044/**
45 * generic_id - add a generic drive id
46 * @drive: drive to make an ID block for
47 *
48 * Add a fake id field to the drive we are passed. This allows
49 * use to skip a ton of NULL checks (which people always miss)
50 * and make drive properties unconditional outside of this file
51 */
52
53static void generic_id(ide_drive_t *drive)
54{
55 drive->id->cyls = drive->cyl;
56 drive->id->heads = drive->head;
57 drive->id->sectors = drive->sect;
58 drive->id->cur_cyls = drive->cyl;
59 drive->id->cur_heads = drive->head;
60 drive->id->cur_sectors = drive->sect;
61}
62
63static void ide_disk_init_chs(ide_drive_t *drive)
64{
65 struct hd_driveid *id = drive->id;
66
67 /* Extract geometry if we did not already have one for the drive */
68 if (!drive->cyl || !drive->head || !drive->sect) {
69 drive->cyl = drive->bios_cyl = id->cyls;
70 drive->head = drive->bios_head = id->heads;
71 drive->sect = drive->bios_sect = id->sectors;
72 }
73
74 /* Handle logical geometry translation by the drive */
75 if ((id->field_valid & 1) && id->cur_cyls &&
76 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
77 drive->cyl = id->cur_cyls;
78 drive->head = id->cur_heads;
79 drive->sect = id->cur_sectors;
80 }
81
82 /* Use physical geometry if what we have still makes no sense */
83 if (drive->head > 16 && id->heads && id->heads <= 16) {
84 drive->cyl = id->cyls;
85 drive->head = id->heads;
86 drive->sect = id->sectors;
87 }
88}
89
90static void ide_disk_init_mult_count(ide_drive_t *drive)
91{
92 struct hd_driveid *id = drive->id;
93
94 drive->mult_count = 0;
95 if (id->max_multsect) {
96#ifdef CONFIG_IDEDISK_MULTI_MODE
97 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
98 id->multsect_valid = id->multsect ? 1 : 0;
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +010099 drive->mult_req = id->multsect_valid ? id->max_multsect : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
101#else /* original, pre IDE-NFG, per request of AC */
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +0100102 drive->mult_req = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 if (drive->mult_req > id->max_multsect)
104 drive->mult_req = id->max_multsect;
105 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
106 drive->special.b.set_multmode = 1;
107#endif
108 }
109}
110
111/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 * do_identify - identify a drive
113 * @drive: drive to identify
114 * @cmd: command used
115 *
116 * Called when we have issued a drive identify command to
117 * read and parse the results. This function is run with
118 * interrupts disabled.
119 */
120
121static inline void do_identify (ide_drive_t *drive, u8 cmd)
122{
123 ide_hwif_t *hwif = HWIF(drive);
124 int bswap = 1;
125 struct hd_driveid *id;
126
127 id = drive->id;
128 /* read 512 bytes of id info */
Bartlomiej Zolnierkiewicz9567b342008-04-28 23:44:36 +0200129 hwif->input_data(drive, NULL, id, SECTOR_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131 drive->id_read = 1;
132 local_irq_enable();
Bartlomiej Zolnierkiewicz7b9f25b2008-02-01 23:09:28 +0100133#ifdef DEBUG
134 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
135 ide_dump_identify((u8 *)id);
136#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 ide_fix_driveid(id);
138
Robert P. J. Daye71bc142007-07-09 23:17:57 +0200139#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 /*
141 * EATA SCSI controllers do a hardware ATA emulation:
142 * Ignore them if there is a driver for them available.
143 */
144 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
145 (id->model[0] == 'S' && id->model[1] == 'K')) {
146 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
147 goto err_misc;
148 }
Robert P. J. Daye71bc142007-07-09 23:17:57 +0200149#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151 /*
152 * WIN_IDENTIFY returns little-endian info,
153 * WIN_PIDENTIFY *usually* returns little-endian info.
154 */
155 if (cmd == WIN_PIDENTIFY) {
156 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
157 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
158 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
159 /* Vertos drives may still be weird */
160 bswap ^= 1;
161 }
162 ide_fixstring(id->model, sizeof(id->model), bswap);
163 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
164 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
165
Tejun Heo699b0522007-11-05 21:42:25 +0100166 /* we depend on this a lot! */
167 id->model[sizeof(id->model)-1] = '\0';
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 if (strstr(id->model, "E X A B Y T E N E S T"))
170 goto err_misc;
171
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 printk("%s: %s, ", drive->name, id->model);
173 drive->present = 1;
174 drive->dead = 0;
175
176 /*
177 * Check for an ATAPI device
178 */
179 if (cmd == WIN_PIDENTIFY) {
180 u8 type = (id->config >> 8) & 0x1f;
181 printk("ATAPI ");
182 switch (type) {
183 case ide_floppy:
184 if (!strstr(id->model, "CD-ROM")) {
185 if (!strstr(id->model, "oppy") &&
186 !strstr(id->model, "poyp") &&
187 !strstr(id->model, "ZIP"))
188 printk("cdrom or floppy?, assuming ");
189 if (drive->media != ide_cdrom) {
190 printk ("FLOPPY");
191 drive->removable = 1;
192 break;
193 }
194 }
195 /* Early cdrom models used zero */
196 type = ide_cdrom;
197 case ide_cdrom:
198 drive->removable = 1;
199#ifdef CONFIG_PPC
200 /* kludge for Apple PowerBook internal zip */
201 if (!strstr(id->model, "CD-ROM") &&
202 strstr(id->model, "ZIP")) {
203 printk ("FLOPPY");
204 type = ide_floppy;
205 break;
206 }
207#endif
208 printk ("CD/DVD-ROM");
209 break;
210 case ide_tape:
211 printk ("TAPE");
212 break;
213 case ide_optical:
214 printk ("OPTICAL");
215 drive->removable = 1;
216 break;
217 default:
218 printk("UNKNOWN (type %d)", type);
219 break;
220 }
221 printk (" drive\n");
222 drive->media = type;
223 /* an ATAPI device ignores DRDY */
224 drive->ready_stat = 0;
225 return;
226 }
227
228 /*
229 * Not an ATAPI device: looks like a "regular" hard disk
230 */
Richard Purdie98109332006-02-03 03:04:55 -0800231
232 /*
233 * 0x848a = CompactFlash device
234 * These are *not* removable in Linux definition of the term
235 */
236
237 if ((id->config != 0x848a) && (id->config & (1<<7)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 drive->removable = 1;
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 drive->media = ide_disk;
Richard Purdie98109332006-02-03 03:04:55 -0800241 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
Bartlomiej Zolnierkiewiczcd3dbc92008-01-25 22:17:13 +0100242
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 return;
244
245err_misc:
246 kfree(id);
247 drive->present = 0;
248 return;
249}
250
251/**
252 * actual_try_to_identify - send ata/atapi identify
253 * @drive: drive to identify
254 * @cmd: command to use
255 *
256 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
257 * and waits for a response. It also monitors irqs while this is
258 * happening, in hope of automatically determining which one is
259 * being used by the interface.
260 *
261 * Returns: 0 device was identified
262 * 1 device timed-out (no response to identify request)
263 * 2 device aborted the command (refused to identify itself)
264 */
265
266static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
267{
268 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200269 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100270 int use_altstatus = 0, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 unsigned long timeout;
272 u8 s = 0, a = 0;
273
274 /* take a deep breath */
275 msleep(50);
276
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200277 if (io_ports->ctl_addr) {
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200278 a = hwif->read_altstatus(hwif);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200279 s = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100280 if ((a ^ s) & ~INDEX_STAT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 /* ancient Seagate drives, broken interfaces */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100282 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
283 "instead of ALTSTATUS(0x%02x)\n",
284 drive->name, s, a);
285 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 /* use non-intrusive polling */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100287 use_altstatus = 1;
288 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
290 /* set features register for atapi
291 * identify command to be sure of reply
292 */
293 if ((cmd == WIN_PIDENTIFY))
294 /* disable dma & overlap */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200295 hwif->OUTB(0, io_ports->feature_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 /* ask drive for ID */
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200298 hwif->exec_command(hwif, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
301 timeout += jiffies;
302 do {
303 if (time_after(jiffies, timeout)) {
304 /* drive timed-out */
305 return 1;
306 }
307 /* give drive a breather */
308 msleep(50);
Bartlomiej Zolnierkiewicz1f6d8a02008-07-23 19:55:52 +0200309 s = use_altstatus ? hwif->read_altstatus(hwif)
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200310 : hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100311 } while (s & BUSY_STAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
313 /* wait for IRQ and DRQ_STAT */
314 msleep(50);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200315 s = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100316
317 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 unsigned long flags;
319
320 /* local CPU only; some systems need this */
321 local_irq_save(flags);
322 /* drive returned ID */
323 do_identify(drive, cmd);
324 /* drive responded with ID */
325 rc = 0;
326 /* clear drive IRQ */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200327 (void)hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 local_irq_restore(flags);
329 } else {
330 /* drive refused ID */
331 rc = 2;
332 }
333 return rc;
334}
335
336/**
337 * try_to_identify - try to identify a drive
338 * @drive: drive to probe
339 * @cmd: command to use
340 *
341 * Issue the identify command and then do IRQ probing to
342 * complete the identification when needed by finding the
343 * IRQ the drive is attached to
344 */
345
346static int try_to_identify (ide_drive_t *drive, u8 cmd)
347{
348 ide_hwif_t *hwif = HWIF(drive);
349 int retval;
350 int autoprobe = 0;
351 unsigned long cookie = 0;
352
353 /*
354 * Disable device irq unless we need to
355 * probe for it. Otherwise we'll get spurious
356 * interrupts during the identify-phase that
357 * the irq handler isn't expecting.
358 */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200359 if (hwif->io_ports.ctl_addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 if (!hwif->irq) {
361 autoprobe = 1;
362 cookie = probe_irq_on();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 }
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100364 ide_set_irq(drive, autoprobe);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 }
366
367 retval = actual_try_to_identify(drive, cmd);
368
369 if (autoprobe) {
370 int irq;
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100371
372 ide_set_irq(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 /* clear drive IRQ */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200374 (void)hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 udelay(5);
376 irq = probe_irq_off(cookie);
377 if (!hwif->irq) {
378 if (irq > 0) {
379 hwif->irq = irq;
380 } else {
381 /* Mmmm.. multiple IRQs..
382 * don't know which was ours
383 */
384 printk("%s: IRQ probe failed (0x%lx)\n",
385 drive->name, cookie);
386 }
387 }
388 }
389 return retval;
390}
391
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100392static int ide_busy_sleep(ide_hwif_t *hwif)
393{
394 unsigned long timeout = jiffies + WAIT_WORSTCASE;
395 u8 stat;
396
397 do {
398 msleep(50);
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200399 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100400 if ((stat & BUSY_STAT) == 0)
401 return 0;
402 } while (time_before(jiffies, timeout));
403
404 return 1;
405}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407/**
408 * do_probe - probe an IDE device
409 * @drive: drive to probe
410 * @cmd: command to use
411 *
412 * do_probe() has the difficult job of finding a drive if it exists,
413 * without getting hung up if it doesn't exist, without trampling on
414 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
415 *
416 * If a drive is "known" to exist (from CMOS or kernel parameters),
417 * but does not respond right away, the probe will "hang in there"
418 * for the maximum wait time (about 30 seconds), otherwise it will
419 * exit much more quickly.
420 *
421 * Returns: 0 device was identified
422 * 1 device timed-out (no response to identify request)
423 * 2 device aborted the command (refused to identify itself)
424 * 3 bad status from device (possible for ATAPI drives)
425 * 4 probe was not attempted because failure was obvious
426 */
427
428static int do_probe (ide_drive_t *drive, u8 cmd)
429{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200431 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100432 int rc;
433 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
435 if (drive->present) {
436 /* avoid waiting for inappropriate probes */
437 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
438 return 4;
439 }
440#ifdef DEBUG
441 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
442 drive->name, drive->present, drive->media,
443 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
444#endif
445
446 /* needed for some systems
447 * (e.g. crw9624 as drive0 with disk as slave)
448 */
449 msleep(50);
450 SELECT_DRIVE(drive);
451 msleep(50);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200452 if (hwif->INB(io_ports->device_addr) != drive->select.all &&
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200453 !drive->present) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 if (drive->select.b.unit != 0) {
455 /* exit with drive0 selected */
456 SELECT_DRIVE(&hwif->drives[0]);
457 /* allow BUSY_STAT to assert & clear */
458 msleep(50);
459 }
460 /* no i/f present: mmm.. this should be a 4 -ml */
461 return 3;
462 }
463
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200464 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100465
466 if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 drive->present || cmd == WIN_PIDENTIFY) {
468 /* send cmd and wait */
469 if ((rc = try_to_identify(drive, cmd))) {
470 /* failed: try again */
471 rc = try_to_identify(drive,cmd);
472 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100473
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200474 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100475
476 if (stat == (BUSY_STAT | READY_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 return 4;
478
Bartlomiej Zolnierkiewiczcc121752008-04-27 15:38:24 +0200479 if (rc == 1 && cmd == WIN_PIDENTIFY) {
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100480 printk(KERN_ERR "%s: no response (status = 0x%02x), "
481 "resetting drive\n", drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 msleep(50);
Bartlomiej Zolnierkiewicze81a3bd2008-07-15 21:21:48 +0200483 SELECT_DRIVE(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 msleep(50);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200485 hwif->exec_command(hwif, WIN_SRST);
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100486 (void)ide_busy_sleep(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 rc = try_to_identify(drive, cmd);
488 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100489
490 /* ensure drive IRQ is clear */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200491 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 if (rc == 1)
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100494 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
495 drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 } else {
497 /* not present or maybe ATAPI */
498 rc = 3;
499 }
500 if (drive->select.b.unit != 0) {
501 /* exit with drive0 selected */
502 SELECT_DRIVE(&hwif->drives[0]);
503 msleep(50);
504 /* ensure drive irq is clear */
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200505 (void)hwif->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 }
507 return rc;
508}
509
510/*
511 *
512 */
513static void enable_nest (ide_drive_t *drive)
514{
515 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100516 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
519 SELECT_DRIVE(drive);
520 msleep(50);
Bartlomiej Zolnierkiewiczc6dfa862008-07-23 19:55:51 +0200521 hwif->exec_command(hwif, EXABYTE_ENABLE_NEST);
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100522
523 if (ide_busy_sleep(hwif)) {
524 printk(KERN_CONT "failed (timeout)\n");
525 return;
526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
528 msleep(50);
529
Bartlomiej Zolnierkiewiczb73c7ee2008-07-23 19:55:52 +0200530 stat = hwif->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100531
532 if (!OK_STAT(stat, 0, BAD_STAT))
533 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
534 else
535 printk(KERN_CONT "success\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 /* if !(success||timed-out) */
538 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
539 /* look for ATAPI device */
540 (void) do_probe(drive, WIN_PIDENTIFY);
541 }
542}
543
544/**
545 * probe_for_drives - upper level drive probe
546 * @drive: drive to probe for
547 *
548 * probe_for_drive() tests for existence of a given drive using do_probe()
549 * and presents things to the user as needed.
550 *
551 * Returns: 0 no device was found
552 * 1 device was found (note: drive->present might
553 * still be 0)
554 */
555
556static inline u8 probe_for_drive (ide_drive_t *drive)
557{
558 /*
559 * In order to keep things simple we have an id
560 * block for all drives at all times. If the device
561 * is pre ATA or refuses ATA/ATAPI identify we
562 * will add faked data to this.
563 *
564 * Also note that 0 everywhere means "can't do X"
565 */
566
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800567 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 drive->id_read = 0;
569 if(drive->id == NULL)
570 {
571 printk(KERN_ERR "ide: out of memory for id data.\n");
572 return 0;
573 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 strcpy(drive->id->model, "UNKNOWN");
575
576 /* skip probing? */
577 if (!drive->noprobe)
578 {
579 /* if !(success||timed-out) */
580 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
581 /* look for ATAPI device */
582 (void) do_probe(drive, WIN_PIDENTIFY);
583 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 if (!drive->present)
585 /* drive not found */
586 return 0;
Alan Cox78595572007-07-03 22:28:35 +0200587 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
588 enable_nest(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 /* identification failed? */
591 if (!drive->id_read) {
592 if (drive->media == ide_disk) {
593 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
594 drive->name, drive->cyl,
595 drive->head, drive->sect);
596 } else if (drive->media == ide_cdrom) {
597 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
598 } else {
599 /* nuke it */
600 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
601 drive->present = 0;
602 }
603 }
604 /* drive was found */
605 }
606 if(!drive->present)
607 return 0;
608 /* The drive wasn't being helpful. Add generic info only */
609 if (drive->id_read == 0) {
610 generic_id(drive);
611 return 1;
612 }
613
614 if (drive->media == ide_disk) {
615 ide_disk_init_chs(drive);
616 ide_disk_init_mult_count(drive);
617 }
618
619 return drive->present;
620}
621
622static void hwif_release_dev (struct device *dev)
623{
624 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
625
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800626 complete(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627}
628
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200629static int ide_register_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630{
Randy Dunlap349ae232006-10-03 01:14:23 -0700631 int ret;
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 /* register with global device tree */
634 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
635 hwif->gendev.driver_data = hwif;
636 if (hwif->gendev.parent == NULL) {
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100637 if (hwif->dev)
638 hwif->gendev.parent = hwif->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 else
640 /* Would like to do = &device_legacy */
641 hwif->gendev.parent = NULL;
642 }
643 hwif->gendev.release = hwif_release_dev;
Randy Dunlap349ae232006-10-03 01:14:23 -0700644 ret = device_register(&hwif->gendev);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200645 if (ret < 0) {
Randy Dunlap349ae232006-10-03 01:14:23 -0700646 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200647 __func__, ret);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200648 goto out;
649 }
650
Greg Kroah-Hartman716ad872008-05-16 17:55:12 -0700651 hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
652 MKDEV(0, 0), hwif, hwif->name);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200653 if (IS_ERR(hwif->portdev)) {
654 ret = PTR_ERR(hwif->portdev);
655 device_unregister(&hwif->gendev);
656 }
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200657out:
658 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659}
660
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100661/**
662 * ide_port_wait_ready - wait for port to become ready
663 * @hwif: IDE port
664 *
665 * This is needed on some PPCs and a bunch of BIOS-less embedded
666 * platforms. Typical cases are:
667 *
668 * - The firmware hard reset the disk before booting the kernel,
669 * the drive is still doing it's poweron-reset sequence, that
670 * can take up to 30 seconds.
671 *
672 * - The firmware does nothing (or no firmware), the device is
673 * still in POST state (same as above actually).
674 *
675 * - Some CD/DVD/Writer combo drives tend to drive the bus during
676 * their reset sequence even when they are non-selected slave
677 * devices, thus preventing discovery of the main HD.
678 *
679 * Doing this wait-for-non-busy should not harm any existing
680 * configuration and fix some issues like the above.
681 *
682 * BenH.
683 *
684 * Returns 0 on success, error code (< 0) otherwise.
685 */
686
687static int ide_port_wait_ready(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688{
Jonas Stare82661052007-11-27 21:35:53 +0100689 int unit, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
691 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
692
693 /* Let HW settle down a bit from whatever init state we
694 * come from */
695 mdelay(2);
696
697 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
698 * I know of at least one disk who takes 31 seconds, I use 35
699 * here to be safe
700 */
701 rc = ide_wait_not_busy(hwif, 35000);
702 if (rc)
703 return rc;
704
705 /* Now make sure both master & slave are ready */
Jonas Stare82661052007-11-27 21:35:53 +0100706 for (unit = 0; unit < MAX_DRIVES; unit++) {
707 ide_drive_t *drive = &hwif->drives[unit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
Jonas Stare82661052007-11-27 21:35:53 +0100709 /* Ignore disks that we will not probe for later. */
710 if (!drive->noprobe || drive->present) {
711 SELECT_DRIVE(drive);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100712 ide_set_irq(drive, 1);
Jonas Stare82661052007-11-27 21:35:53 +0100713 mdelay(2);
714 rc = ide_wait_not_busy(hwif, 35000);
715 if (rc)
716 goto out;
717 } else
718 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
719 drive->name);
720 }
721out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 /* Exit function with master reselected (let's be sane) */
Jonas Stare82661052007-11-27 21:35:53 +0100723 if (unit)
724 SELECT_DRIVE(&hwif->drives[0]);
725
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 return rc;
727}
728
729/**
730 * ide_undecoded_slave - look for bad CF adapters
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100731 * @drive1: drive
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 *
733 * Analyse the drives on the interface and attempt to decide if we
734 * have the same drive viewed twice. This occurs with crap CF adapters
735 * and PCMCIA sometimes.
736 */
737
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100738void ide_undecoded_slave(ide_drive_t *drive1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739{
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100740 ide_drive_t *drive0 = &drive1->hwif->drives[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100742 if ((drive1->dn & 1) == 0 || drive0->present == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 return;
744
745 /* If the models don't match they are not the same product */
746 if (strcmp(drive0->id->model, drive1->id->model))
747 return;
748
749 /* Serial numbers do not match */
750 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
751 return;
752
753 /* No serial number, thankfully very rare for CF */
754 if (drive0->id->serial_no[0] == 0)
755 return;
756
757 /* Appears to be an IDE flash adapter with decode bugs */
758 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
759
760 drive1->present = 0;
761}
762
763EXPORT_SYMBOL_GPL(ide_undecoded_slave);
764
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100765static int ide_probe_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 unsigned long flags;
768 unsigned int irqd;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100769 int unit, rc = -ENODEV;
770
771 BUG_ON(hwif->present);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
Bartlomiej Zolnierkiewicze53cd452008-04-26 22:25:16 +0200773 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe)
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100774 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 /*
777 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
778 * we'll install our IRQ driver much later...
779 */
780 irqd = hwif->irq;
781 if (irqd)
782 disable_irq(hwif->irq);
783
784 local_irq_set(flags);
785
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100786 if (ide_port_wait_ready(hwif) == -EBUSY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
788
789 /*
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100790 * Second drive should only exist if first drive was found,
791 * but a lot of cdrom drives are configured as single slaves.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 */
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100793 for (unit = 0; unit < MAX_DRIVES; ++unit) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 ide_drive_t *drive = &hwif->drives[unit];
795 drive->dn = (hwif->channel ? 2 : 0) + unit;
796 (void) probe_for_drive(drive);
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100797 if (drive->present)
798 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 }
Bartlomiej Zolnierkiewicze460a592008-04-27 15:38:24 +0200800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 local_irq_restore(flags);
Bartlomiej Zolnierkiewicze460a592008-04-27 15:38:24 +0200802
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 /*
804 * Use cached IRQ number. It might be (and is...) changed by probe
805 * code above
806 */
807 if (irqd)
808 enable_irq(irqd);
809
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100810 return rc;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100811}
812
813static void ide_port_tune_devices(ide_hwif_t *hwif)
814{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200815 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100816 int unit;
817
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100818 for (unit = 0; unit < MAX_DRIVES; unit++) {
819 ide_drive_t *drive = &hwif->drives[unit];
820
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200821 if (drive->present && port_ops && port_ops->quirkproc)
822 port_ops->quirkproc(drive);
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100823 }
Bartlomiej Zolnierkiewicz0380dad2007-06-08 15:14:29 +0200824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 for (unit = 0; unit < MAX_DRIVES; ++unit) {
826 ide_drive_t *drive = &hwif->drives[unit];
827
828 if (drive->present) {
Bartlomiej Zolnierkiewicz207daea2008-04-27 15:38:29 +0200829 ide_set_max_pio(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 drive->nice1 = 1;
832
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200833 if (hwif->dma_ops)
Bartlomiej Zolnierkiewicz8c0697c2007-10-16 22:29:58 +0200834 ide_set_dma(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
836 }
Kumar Gala208a08f2006-03-24 03:18:21 -0800837
838 for (unit = 0; unit < MAX_DRIVES; ++unit) {
839 ide_drive_t *drive = &hwif->drives[unit];
840
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +0100841 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
Kumar Gala208a08f2006-03-24 03:18:21 -0800842 drive->no_io_32bit = 1;
843 else
844 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
845 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846}
847
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848#if MAX_HWIFS > 1
849/*
850 * save_match() is used to simplify logic in init_irq() below.
851 *
852 * A loophole here is that we may not know about a particular
853 * hwif's irq until after that hwif is actually probed/initialized..
854 * This could be a problem for the case where an hwif is on a
855 * dual interface that requires serialization (eg. cmd640) and another
856 * hwif using one of the same irqs is initialized beforehand.
857 *
858 * This routine detects and reports such situations, but does not fix them.
859 */
860static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
861{
862 ide_hwif_t *m = *match;
863
864 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
865 if (!new->hwgroup)
866 return;
867 printk("%s: potential irq problem with %s and %s\n",
868 hwif->name, new->name, m->name);
869 }
870 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
871 *match = new;
872}
873#endif /* MAX_HWIFS > 1 */
874
875/*
876 * init request queue
877 */
878static int ide_init_queue(ide_drive_t *drive)
879{
Jens Axboe165125e2007-07-24 09:28:11 +0200880 struct request_queue *q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 ide_hwif_t *hwif = HWIF(drive);
882 int max_sectors = 256;
883 int max_sg_entries = PRD_ENTRIES;
884
885 /*
886 * Our default set up assumes the normal IDE case,
887 * that is 64K segmenting, standard PRD setup
888 * and LBA28. Some drivers then impose their own
889 * limits and LBA48 we could raise it but as yet
890 * do not.
891 */
Christoph Lameter19460892005-06-23 00:08:19 -0700892
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -0700893 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 if (!q)
895 return 1;
896
897 q->queuedata = drive;
898 blk_queue_segment_boundary(q, 0xffff);
899
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 if (hwif->rqsize < max_sectors)
901 max_sectors = hwif->rqsize;
902 blk_queue_max_sectors(q, max_sectors);
903
904#ifdef CONFIG_PCI
905 /* When we have an IOMMU, we may have a problem where pci_map_sg()
906 * creates segments that don't completely match our boundary
907 * requirements and thus need to be broken up again. Because it
908 * doesn't align properly either, we may actually have to break up
909 * to more segments than what was we got in the first place, a max
910 * worst case is twice as many.
911 * This will be fixed once we teach pci_map_sg() about our boundary
912 * requirements, hopefully soon. *FIXME*
913 */
914 if (!PCI_DMA_BUS_IS_PHYS)
915 max_sg_entries >>= 1;
916#endif /* CONFIG_PCI */
917
918 blk_queue_max_hw_segments(q, max_sg_entries);
919 blk_queue_max_phys_segments(q, max_sg_entries);
920
921 /* assign drive queue */
922 drive->queue = q;
923
924 /* needs drive->queue to be set */
925 ide_toggle_bounce(drive, 1);
926
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 return 0;
928}
929
Bartlomiej Zolnierkiewicz0947e0d2008-02-02 19:56:41 +0100930static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
931{
932 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
933
934 spin_lock_irq(&ide_lock);
935 if (!hwgroup->drive) {
936 /* first drive for hwgroup. */
937 drive->next = drive;
938 hwgroup->drive = drive;
939 hwgroup->hwif = HWIF(hwgroup->drive);
940 } else {
941 drive->next = hwgroup->drive->next;
942 hwgroup->drive->next = drive;
943 }
944 spin_unlock_irq(&ide_lock);
945}
946
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947/*
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100948 * For any present drive:
949 * - allocate the block device queue
950 * - link drive into the hwgroup
951 */
952static void ide_port_setup_devices(ide_hwif_t *hwif)
953{
954 int i;
955
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200956 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100957 for (i = 0; i < MAX_DRIVES; i++) {
958 ide_drive_t *drive = &hwif->drives[i];
959
960 if (!drive->present)
961 continue;
962
963 if (ide_init_queue(drive)) {
964 printk(KERN_ERR "ide: failed to init %s\n",
965 drive->name);
966 continue;
967 }
968
969 ide_add_drive_to_hwgroup(drive);
970 }
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200971 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100972}
973
974/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 * This routine sets up the irq for an ide interface, and creates a new
976 * hwgroup for the irq/hwif if none was previously assigned.
977 *
978 * Much of the code is for correctly detecting/handling irq sharing
979 * and irq serialization situations. This is somewhat complex because
980 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 */
982static int init_irq (ide_hwif_t *hwif)
983{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200984 struct ide_io_ports *io_ports = &hwif->io_ports;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985 unsigned int index;
986 ide_hwgroup_t *hwgroup;
987 ide_hwif_t *match = NULL;
988
989
990 BUG_ON(in_interrupt());
991 BUG_ON(irqs_disabled());
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -0700992 BUG_ON(hwif == NULL);
993
Matthias Kaehlckeef298882007-07-09 23:17:55 +0200994 mutex_lock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 hwif->hwgroup = NULL;
996#if MAX_HWIFS > 1
997 /*
998 * Group up with any other hwifs that share our irq(s).
999 */
1000 for (index = 0; index < MAX_HWIFS; index++) {
1001 ide_hwif_t *h = &ide_hwifs[index];
1002 if (h->hwgroup) { /* scan only initialized hwif's */
1003 if (hwif->irq == h->irq) {
1004 hwif->sharing_irq = h->sharing_irq = 1;
1005 if (hwif->chipset != ide_pci ||
1006 h->chipset != ide_pci) {
1007 save_match(hwif, h, &match);
1008 }
1009 }
1010 if (hwif->serialized) {
1011 if (hwif->mate && hwif->mate->irq == h->irq)
1012 save_match(hwif, h, &match);
1013 }
1014 if (h->serialized) {
1015 if (h->mate && hwif->irq == h->mate->irq)
1016 save_match(hwif, h, &match);
1017 }
1018 }
1019 }
1020#endif /* MAX_HWIFS > 1 */
1021 /*
1022 * If we are still without a hwgroup, then form a new one
1023 */
1024 if (match) {
1025 hwgroup = match->hwgroup;
1026 hwif->hwgroup = hwgroup;
1027 /*
1028 * Link us into the hwgroup.
1029 * This must be done early, do ensure that unexpected_intr
1030 * can find the hwif and prevent irq storms.
1031 * No drives are attached to the new hwif, choose_drive
1032 * can't do anything stupid (yet).
1033 * Add ourself as the 2nd entry to the hwgroup->hwif
1034 * linked list, the first entry is the hwif that owns
1035 * hwgroup->handler - do not change that.
1036 */
1037 spin_lock_irq(&ide_lock);
1038 hwif->next = hwgroup->hwif->next;
1039 hwgroup->hwif->next = hwif;
Bartlomiej Zolnierkiewiczcae5c822008-02-01 23:09:36 +01001040 BUG_ON(hwif->next == hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 spin_unlock_irq(&ide_lock);
1042 } else {
Bartlomiej Zolnierkiewicz422278e2008-02-01 23:09:35 +01001043 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1044 hwif_to_node(hwif));
1045 if (hwgroup == NULL)
1046 goto out_up;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
1048 hwif->hwgroup = hwgroup;
Bartlomiej Zolnierkiewicz422278e2008-02-01 23:09:35 +01001049 hwgroup->hwif = hwif->next = hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 init_timer(&hwgroup->timer);
1052 hwgroup->timer.function = &ide_timer_expiry;
1053 hwgroup->timer.data = (unsigned long) hwgroup;
1054 }
1055
1056 /*
1057 * Allocate the irq, if not already obtained for another hwif
1058 */
1059 if (!match || match->irq != hwif->irq) {
Bartlomiej Zolnierkiewicz7b5da4b2008-01-25 22:17:08 +01001060 int sa = 0;
Adrian Bunk7b892802008-02-06 01:36:29 -08001061#if defined(__mc68000__)
Thomas Gleixner362537b2006-07-01 19:29:34 -07001062 sa = IRQF_SHARED;
Bartlomiej Zolnierkiewicze1771e22008-02-11 00:32:15 +01001063#endif /* __mc68000__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064
Bartlomiej Zolnierkiewicz7b5da4b2008-01-25 22:17:08 +01001065 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
Thomas Gleixner362537b2006-07-01 19:29:34 -07001066 sa = IRQF_SHARED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001068 if (io_ports->ctl_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 /* clear nIEN */
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +02001070 hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS, io_ports->ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001071
1072 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1073 goto out_unlink;
1074 }
1075
Bartlomiej Zolnierkiewicz8a0e7e12008-02-02 19:56:41 +01001076 if (!hwif->rqsize) {
1077 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1078 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1079 hwif->rqsize = 256;
1080 else
1081 hwif->rqsize = 65536;
1082 }
1083
Adrian Bunk7b892802008-02-06 01:36:29 -08001084#if !defined(__mc68000__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001086 io_ports->data_addr, io_ports->status_addr,
1087 io_ports->ctl_addr, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088#else
1089 printk("%s at 0x%08lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001090 io_ports->data_addr, hwif->irq);
Adrian Bunk7b892802008-02-06 01:36:29 -08001091#endif /* __mc68000__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 if (match)
1093 printk(" (%sed with %s)",
1094 hwif->sharing_irq ? "shar" : "serializ", match->name);
1095 printk("\n");
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +01001096
Matthias Kaehlckeef298882007-07-09 23:17:55 +02001097 mutex_unlock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 return 0;
1099out_unlink:
Bartlomiej Zolnierkiewiczfbd13082008-02-01 23:09:36 +01001100 ide_remove_port_from_hwgroup(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101out_up:
Matthias Kaehlckeef298882007-07-09 23:17:55 +02001102 mutex_unlock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 return 1;
1104}
1105
1106static int ata_lock(dev_t dev, void *data)
1107{
1108 /* FIXME: we want to pin hwif down */
1109 return 0;
1110}
1111
1112static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1113{
1114 ide_hwif_t *hwif = data;
1115 int unit = *part >> PARTN_BITS;
1116 ide_drive_t *drive = &hwif->drives[unit];
1117 if (!drive->present)
1118 return NULL;
1119
1120 if (drive->media == ide_disk)
1121 request_module("ide-disk");
1122 if (drive->scsi)
1123 request_module("ide-scsi");
1124 if (drive->media == ide_cdrom || drive->media == ide_optical)
1125 request_module("ide-cd");
1126 if (drive->media == ide_tape)
1127 request_module("ide-tape");
1128 if (drive->media == ide_floppy)
1129 request_module("ide-floppy");
1130
1131 return NULL;
1132}
1133
1134static struct kobject *exact_match(dev_t dev, int *part, void *data)
1135{
1136 struct gendisk *p = data;
1137 *part &= (1 << PARTN_BITS) - 1;
Kay Sieversedfaa7c2007-05-21 22:08:01 +02001138 return &p->dev.kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139}
1140
1141static int exact_lock(dev_t dev, void *data)
1142{
1143 struct gendisk *p = data;
1144
1145 if (!get_disk(p))
1146 return -1;
1147 return 0;
1148}
1149
1150void ide_register_region(struct gendisk *disk)
1151{
1152 blk_register_region(MKDEV(disk->major, disk->first_minor),
1153 disk->minors, NULL, exact_match, exact_lock, disk);
1154}
1155
1156EXPORT_SYMBOL_GPL(ide_register_region);
1157
1158void ide_unregister_region(struct gendisk *disk)
1159{
1160 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1161 disk->minors);
1162}
1163
1164EXPORT_SYMBOL_GPL(ide_unregister_region);
1165
1166void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1167{
1168 ide_hwif_t *hwif = drive->hwif;
1169 unsigned int unit = (drive->select.all >> 4) & 1;
1170
1171 disk->major = hwif->major;
1172 disk->first_minor = unit << PARTN_BITS;
1173 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1174 disk->queue = drive->queue;
1175}
1176
1177EXPORT_SYMBOL_GPL(ide_init_disk);
1178
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001179static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1180{
1181 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1182
1183 if (drive == drive->next) {
1184 /* special case: last drive from hwgroup. */
1185 BUG_ON(hwgroup->drive != drive);
1186 hwgroup->drive = NULL;
1187 } else {
1188 ide_drive_t *walk;
1189
1190 walk = hwgroup->drive;
1191 while (walk->next != drive)
1192 walk = walk->next;
1193 walk->next = drive->next;
1194 if (hwgroup->drive == drive) {
1195 hwgroup->drive = drive->next;
1196 hwgroup->hwif = hwgroup->drive->hwif;
1197 }
1198 }
1199 BUG_ON(hwgroup->drive == drive);
1200}
1201
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202static void drive_release_dev (struct device *dev)
1203{
1204 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1205
Bartlomiej Zolnierkiewicz5b0c4b32008-04-18 00:46:22 +02001206 ide_proc_unregister_device(drive);
1207
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001208 spin_lock_irq(&ide_lock);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001209 ide_remove_drive_from_hwgroup(drive);
Jesper Juhl6044ec82005-11-07 01:01:32 -08001210 kfree(drive->id);
1211 drive->id = NULL;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001212 drive->present = 0;
1213 /* Messed up locking ... */
1214 spin_unlock_irq(&ide_lock);
1215 blk_cleanup_queue(drive->queue);
1216 spin_lock_irq(&ide_lock);
1217 drive->queue = NULL;
1218 spin_unlock_irq(&ide_lock);
1219
Aleksey Makarovf36d4022006-01-09 15:59:27 -08001220 complete(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221}
1222
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223static int hwif_init(ide_hwif_t *hwif)
1224{
1225 int old_irq;
1226
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 if (!hwif->irq) {
Bartlomiej Zolnierkiewicza861beb2008-07-08 19:27:22 +02001228 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001229 if (!hwif->irq) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 printk("%s: DISABLED, NO IRQ\n", hwif->name);
Bartlomiej Zolnierkiewicz48535652008-02-01 23:09:34 +01001231 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 }
1233 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 if (register_blkdev(hwif->major, hwif->name))
1236 return 0;
1237
1238 if (!hwif->sg_max_nents)
1239 hwif->sg_max_nents = PRD_ENTRIES;
1240
Jens Axboe45711f12007-10-22 21:19:53 +02001241 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 GFP_KERNEL);
1243 if (!hwif->sg_table) {
1244 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1245 goto out;
1246 }
Jens Axboe45711f12007-10-22 21:19:53 +02001247
1248 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249
1250 if (init_irq(hwif) == 0)
1251 goto done;
1252
1253 old_irq = hwif->irq;
1254 /*
1255 * It failed to initialise. Find the default IRQ for
1256 * this port and try that.
1257 */
Bartlomiej Zolnierkiewicza861beb2008-07-08 19:27:22 +02001258 hwif->irq = __ide_default_irq(hwif->io_ports.data_addr);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +02001259 if (!hwif->irq) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001260 printk("%s: Disabled unable to get IRQ %d.\n",
1261 hwif->name, old_irq);
1262 goto out;
1263 }
1264 if (init_irq(hwif)) {
1265 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1266 hwif->name, old_irq, hwif->irq);
1267 goto out;
1268 }
1269 printk("%s: probed IRQ %d failed, using default.\n",
1270 hwif->name, hwif->irq);
1271
1272done:
Bartlomiej Zolnierkiewicz3a4e7c92008-02-02 19:56:40 +01001273 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1274 THIS_MODULE, ata_probe, ata_lock, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 return 1;
1276
1277out:
1278 unregister_blkdev(hwif->major, hwif->name);
1279 return 0;
1280}
1281
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001282static void hwif_register_devices(ide_hwif_t *hwif)
1283{
1284 unsigned int i;
1285
1286 for (i = 0; i < MAX_DRIVES; i++) {
1287 ide_drive_t *drive = &hwif->drives[i];
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001288 struct device *dev = &drive->gendev;
1289 int ret;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001290
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001291 if (!drive->present)
1292 continue;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001293
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001294 ide_add_generic_settings(drive);
1295
1296 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1297 dev->parent = &hwif->gendev;
1298 dev->bus = &ide_bus_type;
1299 dev->driver_data = drive;
1300 dev->release = drive_release_dev;
1301
1302 ret = device_register(dev);
1303 if (ret < 0)
1304 printk(KERN_WARNING "IDE: %s: device_register error: "
1305 "%d\n", __func__, ret);
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001306 }
1307}
1308
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001309static void ide_port_init_devices(ide_hwif_t *hwif)
1310{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001311 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001312 int i;
1313
1314 for (i = 0; i < MAX_DRIVES; i++) {
1315 ide_drive_t *drive = &hwif->drives[i];
1316
1317 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1318 drive->io_32bit = 1;
1319 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1320 drive->unmask = 1;
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +01001321 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1322 drive->no_unmask = 1;
Bartlomiej Zolnierkiewicz1f2cf8b2008-02-02 19:56:40 +01001323
Bartlomiej Zolnierkiewicze6d95bd2008-07-16 20:33:42 +02001324 if (port_ops && port_ops->init_dev)
1325 port_ops->init_dev(drive);
1326 }
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001327}
1328
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001329static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1330 const struct ide_port_info *d)
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001331{
Adrian Bunkb7691642008-06-10 20:56:36 +02001332 hwif->channel = port;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001333
1334 if (d->chipset)
1335 hwif->chipset = d->chipset;
1336
1337 if (d->init_iops)
1338 d->init_iops(hwif);
1339
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001340 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1341 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1342 hwif->irq = port ? 15 : 14;
1343
Bartlomiej Zolnierkiewicz23f8e4b2008-05-01 14:08:51 +02001344 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1345 hwif->host_flags |= d->host_flags;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001346 hwif->pio_mask = d->pio_mask;
1347
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001348 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1349 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1350 hwif->port_ops = d->port_ops;
1351
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001352 hwif->swdma_mask = d->swdma_mask;
1353 hwif->mwdma_mask = d->mwdma_mask;
1354 hwif->ultra_mask = d->udma_mask;
1355
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001356 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1357 int rc;
1358
1359 if (d->init_dma)
1360 rc = d->init_dma(hwif, d);
1361 else
1362 rc = ide_hwif_setup_dma(hwif, d);
1363
1364 if (rc < 0) {
1365 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
Bartlomiej Zolnierkiewiczebb00fb2008-07-23 19:55:51 +02001366 hwif->dma_base = 0;
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001367 hwif->swdma_mask = 0;
1368 hwif->mwdma_mask = 0;
1369 hwif->ultra_mask = 0;
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +02001370 } else if (d->dma_ops)
1371 hwif->dma_ops = d->dma_ops;
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001372 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001373
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001374 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
1375 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) {
1376 if (hwif->mate)
1377 hwif->mate->serialized = hwif->serialized = 1;
1378 }
1379
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001380 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1381 hwif->rqsize = 256;
1382
1383 /* call chipset specific routine for each enabled port */
1384 if (d->init_hwif)
1385 d->init_hwif(hwif);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001386}
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001387
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001388static void ide_port_cable_detect(ide_hwif_t *hwif)
1389{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001390 const struct ide_port_ops *port_ops = hwif->port_ops;
1391
1392 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001393 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001394 hwif->cbl = port_ops->cable_detect(hwif);
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001395 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001396}
1397
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001398static ssize_t store_delete_devices(struct device *portdev,
1399 struct device_attribute *attr,
1400 const char *buf, size_t n)
1401{
1402 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1403
1404 if (strncmp(buf, "1", n))
1405 return -EINVAL;
1406
1407 ide_port_unregister_devices(hwif);
1408
1409 return n;
1410};
1411
1412static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
1413
1414static ssize_t store_scan(struct device *portdev,
1415 struct device_attribute *attr,
1416 const char *buf, size_t n)
1417{
1418 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1419
1420 if (strncmp(buf, "1", n))
1421 return -EINVAL;
1422
1423 ide_port_unregister_devices(hwif);
1424 ide_port_scan(hwif);
1425
1426 return n;
1427};
1428
1429static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1430
1431static struct device_attribute *ide_port_attrs[] = {
1432 &dev_attr_delete_devices,
1433 &dev_attr_scan,
1434 NULL
1435};
1436
1437static int ide_sysfs_register_port(ide_hwif_t *hwif)
1438{
1439 int i, rc;
1440
1441 for (i = 0; ide_port_attrs[i]; i++) {
1442 rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
1443 if (rc)
1444 break;
1445 }
1446
1447 return rc;
1448}
1449
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001450/**
1451 * ide_find_port_slot - find free ide_hwifs[] slot
1452 * @d: IDE port info
1453 *
1454 * Return the new hwif. If we are out of free slots return NULL.
1455 */
1456
1457ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d)
1458{
1459 ide_hwif_t *hwif;
1460 int i;
1461 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1462
1463 /*
1464 * Claim an unassigned slot.
1465 *
1466 * Give preference to claiming other slots before claiming ide0/ide1,
1467 * just in case there's another interface yet-to-be-scanned
1468 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1469 *
1470 * Unless there is a bootable card that does not use the standard
1471 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1472 */
1473 if (bootable) {
Bartlomiej Zolnierkiewicze277f912008-04-26 17:36:36 +02001474 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
1475
1476 for (; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001477 hwif = &ide_hwifs[i];
1478 if (hwif->chipset == ide_unknown)
Bartlomiej Zolnierkiewicz256c5f82008-07-16 20:33:39 +02001479 goto out_found;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001480 }
1481 } else {
1482 for (i = 2; i < MAX_HWIFS; i++) {
1483 hwif = &ide_hwifs[i];
1484 if (hwif->chipset == ide_unknown)
Bartlomiej Zolnierkiewicz256c5f82008-07-16 20:33:39 +02001485 goto out_found;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001486 }
1487 for (i = 0; i < 2 && i < MAX_HWIFS; i++) {
1488 hwif = &ide_hwifs[i];
1489 if (hwif->chipset == ide_unknown)
Bartlomiej Zolnierkiewicz256c5f82008-07-16 20:33:39 +02001490 goto out_found;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001491 }
1492 }
1493
Bartlomiej Zolnierkiewiczeb3aff52008-07-16 20:33:42 +02001494 printk(KERN_ERR "%s: no free slot for interface\n",
1495 d ? d->name : "ide");
1496
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001497 return NULL;
Bartlomiej Zolnierkiewicz256c5f82008-07-16 20:33:39 +02001498
1499out_found:
1500 ide_init_port_data(hwif, i);
1501 return hwif;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001502}
1503EXPORT_SYMBOL_GPL(ide_find_port_slot);
1504
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001505int ide_device_add_all(u8 *idx, const struct ide_port_info *d, hw_regs_t **hws)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001506{
1507 ide_hwif_t *hwif, *mate = NULL;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001508 int i, rc = 0;
1509
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001510 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001511 if (idx[i] == 0xff) {
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001512 mate = NULL;
1513 continue;
1514 }
1515
1516 hwif = &ide_hwifs[idx[i]];
1517
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001518 ide_init_port_hw(hwif, hws[i]);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001519 ide_port_apply_params(hwif);
1520
1521 if (d == NULL) {
1522 mate = NULL;
1523 continue;
1524 }
1525
Adrian Bunkb7691642008-06-10 20:56:36 +02001526 if ((i & 1) && mate) {
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001527 hwif->mate = mate;
1528 mate->mate = hwif;
1529 }
1530
1531 mate = (i & 1) ? NULL : hwif;
1532
1533 ide_init_port(hwif, i & 1, d);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001534 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001535 ide_port_init_devices(hwif);
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001536 }
1537
1538 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001539 if (idx[i] == 0xff)
1540 continue;
1541
Bartlomiej Zolnierkiewicz139ddfc2008-02-01 23:09:36 +01001542 hwif = &ide_hwifs[idx[i]];
1543
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001544 if (ide_probe_port(hwif) == 0)
1545 hwif->present = 1;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001546
1547 if (hwif->chipset != ide_4drives || !hwif->mate ||
1548 !hwif->mate->present)
1549 ide_register_port(hwif);
1550
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001551 if (hwif->present)
1552 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001553 }
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001554
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001555 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001556 if (idx[i] == 0xff)
1557 continue;
1558
1559 hwif = &ide_hwifs[idx[i]];
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001560
1561 if (hwif_init(hwif) == 0) {
1562 printk(KERN_INFO "%s: failed to initialize IDE "
1563 "interface\n", hwif->name);
Bartlomiej Zolnierkiewicz48535652008-02-01 23:09:34 +01001564 hwif->present = 0;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001565 rc = -1;
1566 continue;
1567 }
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001568
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001569 if (hwif->present)
1570 ide_port_setup_devices(hwif);
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +02001571
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001572 ide_acpi_init(hwif);
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001573
1574 if (hwif->present)
1575 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001576 }
1577
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001578 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001579 if (idx[i] == 0xff)
1580 continue;
1581
1582 hwif = &ide_hwifs[idx[i]];
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001583
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001584 if (hwif->chipset == ide_unknown)
1585 hwif->chipset = ide_generic;
1586
1587 if (hwif->present)
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001588 hwif_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001589 }
1590
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001591 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz327617e2008-02-02 19:56:43 +01001592 if (idx[i] == 0xff)
1593 continue;
1594
1595 hwif = &ide_hwifs[idx[i]];
1596
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001597 ide_sysfs_register_port(hwif);
1598 ide_proc_register_port(hwif);
1599
1600 if (hwif->present)
Bartlomiej Zolnierkiewiczd9270a32008-02-02 19:56:43 +01001601 ide_proc_port_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001602 }
1603
1604 return rc;
1605}
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001606EXPORT_SYMBOL_GPL(ide_device_add_all);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001607
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001608int ide_device_add(u8 *idx, const struct ide_port_info *d, hw_regs_t **hws)
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001609{
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001610 hw_regs_t *hws_all[MAX_HWIFS];
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001611 u8 idx_all[MAX_HWIFS];
1612 int i;
1613
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001614 for (i = 0; i < MAX_HWIFS; i++) {
1615 hws_all[i] = (i < 4) ? hws[i] : NULL;
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001616 idx_all[i] = (i < 4) ? idx[i] : 0xff;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001617 }
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001618
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001619 return ide_device_add_all(idx_all, d, hws_all);
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001620}
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001621EXPORT_SYMBOL_GPL(ide_device_add);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001622
1623void ide_port_scan(ide_hwif_t *hwif)
1624{
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001625 ide_port_apply_params(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001626 ide_port_cable_detect(hwif);
1627 ide_port_init_devices(hwif);
1628
1629 if (ide_probe_port(hwif) < 0)
1630 return;
1631
1632 hwif->present = 1;
1633
1634 ide_port_tune_devices(hwif);
1635 ide_acpi_port_init_devices(hwif);
1636 ide_port_setup_devices(hwif);
1637 hwif_register_devices(hwif);
1638 ide_proc_port_register_devices(hwif);
1639}
1640EXPORT_SYMBOL_GPL(ide_port_scan);
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001641
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001642static void ide_legacy_init_one(u8 *idx, hw_regs_t **hws, hw_regs_t *hw,
1643 u8 port_no, const struct ide_port_info *d,
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001644 unsigned long config)
1645{
1646 ide_hwif_t *hwif;
1647 unsigned long base, ctl;
1648 int irq;
1649
1650 if (port_no == 0) {
1651 base = 0x1f0;
1652 ctl = 0x3f6;
1653 irq = 14;
1654 } else {
1655 base = 0x170;
1656 ctl = 0x376;
1657 irq = 15;
1658 }
1659
Bartlomiej Zolnierkiewiczd92f1a22008-04-26 22:25:18 +02001660 if (!request_region(base, 8, d->name)) {
1661 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
1662 d->name, base, base + 7);
1663 return;
1664 }
1665
1666 if (!request_region(ctl, 1, d->name)) {
1667 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
1668 d->name, ctl);
1669 release_region(base, 8);
1670 return;
1671 }
1672
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001673 ide_std_init_ports(hw, base, ctl);
1674 hw->irq = irq;
Bartlomiej Zolnierkiewiczd427e832008-06-10 20:56:37 +02001675 hw->chipset = d->chipset;
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001676
1677 hwif = ide_find_port_slot(d);
1678 if (hwif) {
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001679 hwif->chipset = hw->chipset;
1680
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001681 if (config)
1682 hwif->config_data = config;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001683
1684 hws[port_no] = hw;
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001685 idx[port_no] = hwif->index;
1686 }
1687}
1688
Bartlomiej Zolnierkiewicz0bfeee72008-04-26 22:25:16 +02001689int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001690{
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001691 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001692 hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL };
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001693
1694 memset(&hw, 0, sizeof(hw));
1695
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001696 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001697 ide_legacy_init_one(idx, hws, &hw[0], 0, d, config);
1698 ide_legacy_init_one(idx, hws, &hw[1], 1, d, config);
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001699
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001700 if (idx[0] == 0xff && idx[1] == 0xff &&
1701 (d->host_flags & IDE_HFLAG_SINGLE))
Bartlomiej Zolnierkiewicz0bfeee72008-04-26 22:25:16 +02001702 return -ENOENT;
1703
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001704 ide_device_add(idx, d, hws);
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001705
1706 return 0;
1707}
1708EXPORT_SYMBOL_GPL(ide_legacy_device_add);