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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
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
51static void generic_id(ide_drive_t *drive)
52{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020053 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
60static void ide_disk_init_chs(ide_drive_t *drive)
61{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020062 u16 *id = drive->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64 /* Extract geometry if we did not already have one for the drive */
65 if (!drive->cyl || !drive->head || !drive->sect) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020066 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];
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 }
70
71 /* Handle logical geometry translation by the drive */
Bartlomiej Zolnierkiewiczdd8f46f2008-10-10 22:39:19 +020072 if (ata_id_current_chs_valid(id)) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020073 drive->cyl = id[ATA_ID_CUR_CYLS];
74 drive->head = id[ATA_ID_CUR_HEADS];
75 drive->sect = id[ATA_ID_CUR_SECTORS];
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 }
77
78 /* Use physical geometry if what we have still makes no sense */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020079 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];
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 }
84}
85
86static void ide_disk_init_mult_count(ide_drive_t *drive)
87{
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +020088 u16 *id = drive->id;
89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +020091 if (max_multsect) {
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +020092 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;
Bartlomiej Zolnierkiewicz7c51c172008-10-10 22:39:26 +020098
99 if (drive->mult_req)
Bartlomiej Zolnierkiewiczca1b96e2009-05-17 19:12:21 +0200100 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 }
102}
103
Bartlomiej Zolnierkiewicz24630dc2009-01-02 16:12:47 +0100104static void ide_classify_ata_dev(ide_drive_t *drive)
105{
106 u16 *id = drive->id;
107 char *m = (char *)&id[ATA_ID_PROD];
108 int is_cfa = ata_id_is_cfa(id);
109
110 /* CF devices are *not* removable in Linux definition of the term */
111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
112 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
113
114 drive->media = ide_disk;
115
116 if (!ata_id_has_unload(drive->id))
117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
118
119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
120 is_cfa ? "CFA" : "ATA");
121}
122
123static void ide_classify_atapi_dev(ide_drive_t *drive)
124{
125 u16 *id = drive->id;
126 char *m = (char *)&id[ATA_ID_PROD];
127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
128
129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
130 switch (type) {
131 case ide_floppy:
132 if (!strstr(m, "CD-ROM")) {
133 if (!strstr(m, "oppy") &&
134 !strstr(m, "poyp") &&
135 !strstr(m, "ZIP"))
136 printk(KERN_CONT "cdrom or floppy?, assuming ");
137 if (drive->media != ide_cdrom) {
138 printk(KERN_CONT "FLOPPY");
139 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
140 break;
141 }
142 }
143 /* Early cdrom models used zero */
144 type = ide_cdrom;
145 case ide_cdrom:
146 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
147#ifdef CONFIG_PPC
148 /* kludge for Apple PowerBook internal zip */
149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
150 printk(KERN_CONT "FLOPPY");
151 type = ide_floppy;
152 break;
153 }
154#endif
155 printk(KERN_CONT "CD/DVD-ROM");
156 break;
157 case ide_tape:
158 printk(KERN_CONT "TAPE");
159 break;
160 case ide_optical:
161 printk(KERN_CONT "OPTICAL");
162 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
163 break;
164 default:
165 printk(KERN_CONT "UNKNOWN (type %d)", type);
166 break;
167 }
168
169 printk(KERN_CONT " drive\n");
170 drive->media = type;
171 /* an ATAPI device ignores DRDY */
172 drive->ready_stat = 0;
173 if (ata_id_cdb_intr(id))
174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
176 /* we don't do head unloading on ATAPI devices */
177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
178}
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 * do_identify - identify a drive
182 * @drive: drive to identify
183 * @cmd: command used
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100184 * @id: buffer for IDENTIFY data
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 *
186 * Called when we have issued a drive identify command to
187 * read and parse the results. This function is run with
188 * interrupts disabled.
189 */
Bartlomiej Zolnierkiewicz047140a2008-12-29 20:27:36 +0100190
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100191static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100193 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200194 char *m = (char *)&id[ATA_ID_PROD];
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100195 unsigned long flags;
Bartlomiej Zolnierkiewicz24630dc2009-01-02 16:12:47 +0100196 int bswap = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100198 /* local CPU only; some systems need this */
199 local_irq_save(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /* read 512 bytes of id info */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100202 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200204 drive->dev_flags |= IDE_DFLAG_ID_READ;
Bartlomiej Zolnierkiewicz7b9f25b2008-02-01 23:09:28 +0100205#ifdef DEBUG
206 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
207 ide_dump_identify((u8 *)id);
208#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 ide_fix_driveid(id);
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /*
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200212 * ATA_CMD_ID_ATA returns little-endian info,
213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 */
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200215 if (cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200216 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
217 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
218 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /* Vertos drives may still be weird */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200220 bswap ^= 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 }
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200222
223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Tejun Heo699b0522007-11-05 21:42:25 +0100227 /* we depend on this a lot! */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200228 m[ATA_ID_PROD_LEN - 1] = '\0';
Tejun Heo699b0522007-11-05 21:42:25 +0100229
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200230 if (strstr(m, "E X A B Y T E N E S T"))
Bartlomiej Zolnierkiewicz69197ad2009-03-27 12:46:26 +0100231 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
232 else
233 drive->dev_flags |= IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234}
235
236/**
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100237 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 * @drive: drive to identify
239 * @cmd: command to use
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100240 * @id: buffer for IDENTIFY data
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000241 * @irq_ctx: flag set when called from the IRQ context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 *
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100243 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 *
245 * Returns: 0 device was identified
246 * 1 device timed-out (no response to identify request)
247 * 2 device aborted the command (refused to identify itself)
248 */
249
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000250int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100252 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200253 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200254 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100255 int use_altstatus = 0, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 unsigned long timeout;
257 u8 s = 0, a = 0;
258
Bartlomiej Zolnierkiewicza1828072009-03-24 23:22:53 +0100259 /*
260 * Disable device IRQ. Otherwise we'll get spurious interrupts
261 * during the identify phase that the IRQ handler isn't expecting.
262 */
263 if (io_ports->ctl_addr)
Sergei Shtylyovecf3a312009-03-31 20:15:30 +0200264 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
Bartlomiej Zolnierkiewicza1828072009-03-24 23:22:53 +0100265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 /* take a deep breath */
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000267 if (irq_ctx)
268 mdelay(50);
269 else
270 msleep(50);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Bartlomiej Zolnierkiewicz66364872008-12-02 20:40:03 +0100272 if (io_ports->ctl_addr &&
273 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200274 a = tp_ops->read_altstatus(hwif);
275 s = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200276 if ((a ^ s) & ~ATA_IDX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 /* ancient Seagate drives, broken interfaces */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100278 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
279 "instead of ALTSTATUS(0x%02x)\n",
280 drive->name, s, a);
281 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 /* use non-intrusive polling */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100283 use_altstatus = 1;
284 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
286 /* set features register for atapi
287 * identify command to be sure of reply
288 */
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200289 if (cmd == ATA_CMD_ID_ATAPI) {
Sergei Shtylyovc9ff9e72009-04-08 14:13:03 +0200290 struct ide_taskfile tf;
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200291
Sergei Shtylyovc9ff9e72009-04-08 14:13:03 +0200292 memset(&tf, 0, sizeof(tf));
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200293 /* disable DMA & overlap */
Sergei Shtylyovc9ff9e72009-04-08 14:13:03 +0200294 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200295 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 /* ask drive for ID */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200298 tp_ops->exec_command(hwif, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200300 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200301
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200302 /* wait for IRQ and ATA_DRQ */
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000303 if (irq_ctx) {
304 rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
305 if (rc)
306 return 1;
307 } else {
308 rc = ide_busy_sleep(drive, timeout, use_altstatus);
309 if (rc)
310 return 1;
311
312 msleep(50);
313 s = tp_ops->read_status(hwif);
314 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100315
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200316 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 /* drive returned ID */
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100318 do_identify(drive, cmd, id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 /* drive responded with ID */
320 rc = 0;
321 /* clear drive IRQ */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200322 (void)tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 } else {
324 /* drive refused ID */
325 rc = 2;
326 }
327 return rc;
328}
329
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200330int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100331{
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200332 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100333 u8 stat;
334
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200335 timeout += jiffies;
336
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100337 do {
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200338 msleep(50); /* give drive a breather */
339 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
340 : hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200341 if ((stat & ATA_BUSY) == 0)
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100342 return 0;
343 } while (time_before(jiffies, timeout));
344
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200345 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
346
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200347 return 1; /* drive timed-out */
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100348}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200350static u8 ide_read_device(ide_drive_t *drive)
351{
Sergei Shtylyov3153c262009-04-08 14:13:03 +0200352 struct ide_taskfile tf;
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200353
Sergei Shtylyov3153c262009-04-08 14:13:03 +0200354 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200355
Sergei Shtylyov3153c262009-04-08 14:13:03 +0200356 return tf.device;
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200357}
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359/**
360 * do_probe - probe an IDE device
361 * @drive: drive to probe
362 * @cmd: command to use
363 *
364 * do_probe() has the difficult job of finding a drive if it exists,
365 * without getting hung up if it doesn't exist, without trampling on
366 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
367 *
368 * If a drive is "known" to exist (from CMOS or kernel parameters),
369 * but does not respond right away, the probe will "hang in there"
370 * for the maximum wait time (about 30 seconds), otherwise it will
371 * exit much more quickly.
372 *
373 * Returns: 0 device was identified
374 * 1 device timed-out (no response to identify request)
375 * 2 device aborted the command (refused to identify itself)
376 * 3 bad status from device (possible for ATAPI drives)
377 * 4 probe was not attempted because failure was obvious
378 */
379
380static int do_probe (ide_drive_t *drive, u8 cmd)
381{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100382 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200383 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100384 u16 *id = drive->id;
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100385 int rc;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200386 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200388 /* avoid waiting for inappropriate probes */
389 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
390 return 4;
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392#ifdef DEBUG
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200393 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200394 drive->name, present, drive->media,
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200395 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396#endif
397
398 /* needed for some systems
399 * (e.g. crw9624 as drive0 with disk as slave)
400 */
401 msleep(50);
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200402 tp_ops->dev_select(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 msleep(50);
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200404
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200405 if (ide_read_device(drive) != drive->select && present == 0) {
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200406 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 /* exit with drive0 selected */
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200408 tp_ops->dev_select(hwif->devices[0]);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200409 /* allow ATA_BUSY to assert & clear */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 msleep(50);
411 }
412 /* no i/f present: mmm.. this should be a 4 -ml */
413 return 3;
414 }
415
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200416 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100417
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200418 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200419 present || cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000420 rc = ide_dev_read_id(drive, cmd, id, 0);
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100421 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 /* failed: try again */
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000423 rc = ide_dev_read_id(drive, cmd, id, 0);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100424
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200425 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100426
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200427 if (stat == (ATA_BUSY | ATA_DRDY))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return 4;
429
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200430 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100431 printk(KERN_ERR "%s: no response (status = 0x%02x), "
432 "resetting drive\n", drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 msleep(50);
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200434 tp_ops->dev_select(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 msleep(50);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200436 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200437 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000438 rc = ide_dev_read_id(drive, cmd, id, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100440
441 /* ensure drive IRQ is clear */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200442 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100443
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 if (rc == 1)
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100445 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
446 drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 } else {
448 /* not present or maybe ATAPI */
449 rc = 3;
450 }
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200451 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 /* exit with drive0 selected */
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200453 tp_ops->dev_select(hwif->devices[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 msleep(50);
455 /* ensure drive irq is clear */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200456 (void)tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 }
458 return rc;
459}
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/**
462 * probe_for_drives - upper level drive probe
463 * @drive: drive to probe for
464 *
465 * probe_for_drive() tests for existence of a given drive using do_probe()
466 * and presents things to the user as needed.
467 *
468 * Returns: 0 no device was found
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200469 * 1 device was found
470 * (note: IDE_DFLAG_PRESENT might still be not set)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 */
Bartlomiej Zolnierkiewicz047140a2008-12-29 20:27:36 +0100472
473static u8 probe_for_drive(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200475 char *m;
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100476 int rc;
477 u8 cmd;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200478
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200479 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
480
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200481 m = (char *)&drive->id[ATA_ID_PROD];
482 strcpy(m, "UNKNOWN");
483
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 /* skip probing? */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200485 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 /* if !(success||timed-out) */
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100487 cmd = ATA_CMD_ID_ATA;
488 rc = do_probe(drive, cmd);
489 if (rc >= 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 /* look for ATAPI device */
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100491 cmd = ATA_CMD_ID_ATAPI;
492 rc = do_probe(drive, cmd);
493 }
Bartlomiej Zolnierkiewiczc36a7e92008-10-10 22:39:23 +0200494
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200495 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Hugh Dickins5f4417a2009-06-10 14:37:20 +0200496 return 0;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200497
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /* identification failed? */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200499 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 if (drive->media == ide_disk) {
501 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
502 drive->name, drive->cyl,
503 drive->head, drive->sect);
504 } else if (drive->media == ide_cdrom) {
505 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
506 } else {
507 /* nuke it */
508 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200509 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100511 } else {
512 if (cmd == ATA_CMD_ID_ATAPI)
513 ide_classify_atapi_dev(drive);
514 else
515 ide_classify_ata_dev(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 }
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200518
519 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Hugh Dickins5f4417a2009-06-10 14:37:20 +0200520 return 0;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200521
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 /* The drive wasn't being helpful. Add generic info only */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200523 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 generic_id(drive);
525 return 1;
526 }
527
528 if (drive->media == ide_disk) {
529 ide_disk_init_chs(drive);
530 ide_disk_init_mult_count(drive);
531 }
532
Bartlomiej Zolnierkiewicz69197ad2009-03-27 12:46:26 +0100533 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
Pavel Machekfc410692008-07-23 19:56:02 +0200536static void hwif_release_dev(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537{
538 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
539
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800540 complete(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541}
542
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200543static int ide_register_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544{
Randy Dunlap349ae232006-10-03 01:14:23 -0700545 int ret;
546
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 /* register with global device tree */
Kay Sieversdc09c782008-12-29 20:27:36 +0100548 dev_set_name(&hwif->gendev, hwif->name);
Greg Kroah-Hartmanfcb52072009-04-30 14:43:31 -0700549 dev_set_drvdata(&hwif->gendev, hwif);
Andreas Schwabbb54aff2009-01-19 13:46:56 +0100550 if (hwif->gendev.parent == NULL)
551 hwif->gendev.parent = hwif->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 hwif->gendev.release = hwif_release_dev;
Bartlomiej Zolnierkiewicz96d40942009-01-02 16:12:47 +0100553
Randy Dunlap349ae232006-10-03 01:14:23 -0700554 ret = device_register(&hwif->gendev);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200555 if (ret < 0) {
Randy Dunlap349ae232006-10-03 01:14:23 -0700556 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200557 __func__, ret);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200558 goto out;
559 }
560
Greg Kroah-Hartman3ee074b2008-07-21 20:03:34 -0700561 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
562 MKDEV(0, 0), hwif, hwif->name);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200563 if (IS_ERR(hwif->portdev)) {
564 ret = PTR_ERR(hwif->portdev);
565 device_unregister(&hwif->gendev);
566 }
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200567out:
568 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569}
570
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100571/**
572 * ide_port_wait_ready - wait for port to become ready
573 * @hwif: IDE port
574 *
575 * This is needed on some PPCs and a bunch of BIOS-less embedded
576 * platforms. Typical cases are:
577 *
578 * - The firmware hard reset the disk before booting the kernel,
579 * the drive is still doing it's poweron-reset sequence, that
580 * can take up to 30 seconds.
581 *
582 * - The firmware does nothing (or no firmware), the device is
583 * still in POST state (same as above actually).
584 *
585 * - Some CD/DVD/Writer combo drives tend to drive the bus during
586 * their reset sequence even when they are non-selected slave
587 * devices, thus preventing discovery of the main HD.
588 *
589 * Doing this wait-for-non-busy should not harm any existing
590 * configuration and fix some issues like the above.
591 *
592 * BenH.
593 *
594 * Returns 0 on success, error code (< 0) otherwise.
595 */
596
597static int ide_port_wait_ready(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598{
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200599 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100600 ide_drive_t *drive;
601 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
603 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
604
605 /* Let HW settle down a bit from whatever init state we
606 * come from */
607 mdelay(2);
608
609 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
610 * I know of at least one disk who takes 31 seconds, I use 35
611 * here to be safe
612 */
613 rc = ide_wait_not_busy(hwif, 35000);
614 if (rc)
615 return rc;
616
617 /* Now make sure both master & slave are ready */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100618 ide_port_for_each_dev(i, drive, hwif) {
Jonas Stare82661052007-11-27 21:35:53 +0100619 /* Ignore disks that we will not probe for later. */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200620 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
621 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200622 tp_ops->dev_select(drive);
623 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
Jonas Stare82661052007-11-27 21:35:53 +0100624 mdelay(2);
625 rc = ide_wait_not_busy(hwif, 35000);
626 if (rc)
627 goto out;
628 } else
629 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
630 drive->name);
631 }
632out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 /* Exit function with master reselected (let's be sane) */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100634 if (i)
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200635 tp_ops->dev_select(hwif->devices[0]);
Jonas Stare82661052007-11-27 21:35:53 +0100636
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 return rc;
638}
639
640/**
641 * ide_undecoded_slave - look for bad CF adapters
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200642 * @dev1: slave device
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 *
644 * Analyse the drives on the interface and attempt to decide if we
645 * have the same drive viewed twice. This occurs with crap CF adapters
646 * and PCMCIA sometimes.
647 */
648
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200649void ide_undecoded_slave(ide_drive_t *dev1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650{
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100651 ide_drive_t *dev0 = dev1->hwif->devices[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200653 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 return;
655
656 /* If the models don't match they are not the same product */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200657 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
658 (char *)&dev1->id[ATA_ID_PROD]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 return;
660
661 /* Serial numbers do not match */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200662 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
663 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 return;
665
666 /* No serial number, thankfully very rare for CF */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200667 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 return;
669
670 /* Appears to be an IDE flash adapter with decode bugs */
671 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
672
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200673 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674}
675
676EXPORT_SYMBOL_GPL(ide_undecoded_slave);
677
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100678static int ide_probe_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100680 ide_drive_t *drive;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 unsigned int irqd;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100682 int i, rc = -ENODEV;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100683
684 BUG_ON(hwif->present);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100686 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
687 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100688 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 /*
691 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
692 * we'll install our IRQ driver much later...
693 */
694 irqd = hwif->irq;
695 if (irqd)
696 disable_irq(hwif->irq);
697
Bartlomiej Zolnierkiewicza20b2a42009-06-08 22:07:28 +0200698 rc = ide_port_wait_ready(hwif);
699 if (rc == -ENODEV) {
700 printk(KERN_INFO "%s: no devices on the port\n", hwif->name);
701 goto out;
702 } else if (rc == -EBUSY)
703 printk(KERN_ERR "%s: not ready before the probe\n", hwif->name);
704 else
705 rc = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707 /*
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100708 * Second drive should only exist if first drive was found,
709 * but a lot of cdrom drives are configured as single slaves.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100711 ide_port_for_each_dev(i, drive, hwif) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 (void) probe_for_drive(drive);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200713 if (drive->dev_flags & IDE_DFLAG_PRESENT)
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100714 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 }
Bartlomiej Zolnierkiewicza20b2a42009-06-08 22:07:28 +0200716out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 /*
718 * Use cached IRQ number. It might be (and is...) changed by probe
719 * code above
720 */
721 if (irqd)
722 enable_irq(irqd);
723
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100724 return rc;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100725}
726
727static void ide_port_tune_devices(ide_hwif_t *hwif)
728{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200729 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100730 ide_drive_t *drive;
731 int i;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100732
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100733 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewicz8bc1e5a2009-06-07 15:37:09 +0200734 ide_check_nien_quirk_list(drive);
735
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100736 if (port_ops && port_ops->quirkproc)
737 port_ops->quirkproc(drive);
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100738 }
Bartlomiej Zolnierkiewicz0380dad2007-06-08 15:14:29 +0200739
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100740 ide_port_for_each_present_dev(i, drive, hwif) {
741 ide_set_max_pio(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100743 drive->dev_flags |= IDE_DFLAG_NICE1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100745 if (hwif->dma_ops)
746 ide_set_dma(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 }
748}
749
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 * init request queue
752 */
753static int ide_init_queue(ide_drive_t *drive)
754{
Jens Axboe165125e2007-07-24 09:28:11 +0200755 struct request_queue *q;
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100756 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 int max_sectors = 256;
758 int max_sg_entries = PRD_ENTRIES;
759
760 /*
761 * Our default set up assumes the normal IDE case,
762 * that is 64K segmenting, standard PRD setup
763 * and LBA28. Some drivers then impose their own
764 * limits and LBA48 we could raise it but as yet
765 * do not.
766 */
Christoph Lameter19460892005-06-23 00:08:19 -0700767
Bartlomiej Zolnierkiewicz201bffa2009-01-02 16:12:50 +0100768 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 if (!q)
770 return 1;
771
772 q->queuedata = drive;
773 blk_queue_segment_boundary(q, 0xffff);
774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 if (hwif->rqsize < max_sectors)
776 max_sectors = hwif->rqsize;
777 blk_queue_max_sectors(q, max_sectors);
778
779#ifdef CONFIG_PCI
780 /* When we have an IOMMU, we may have a problem where pci_map_sg()
781 * creates segments that don't completely match our boundary
782 * requirements and thus need to be broken up again. Because it
783 * doesn't align properly either, we may actually have to break up
784 * to more segments than what was we got in the first place, a max
785 * worst case is twice as many.
786 * This will be fixed once we teach pci_map_sg() about our boundary
787 * requirements, hopefully soon. *FIXME*
788 */
789 if (!PCI_DMA_BUS_IS_PHYS)
790 max_sg_entries >>= 1;
791#endif /* CONFIG_PCI */
792
793 blk_queue_max_hw_segments(q, max_sg_entries);
794 blk_queue_max_phys_segments(q, max_sg_entries);
795
796 /* assign drive queue */
797 drive->queue = q;
798
799 /* needs drive->queue to be set */
800 ide_toggle_bounce(drive, 1);
801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 return 0;
803}
804
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +0100805static DEFINE_MUTEX(ide_cfg_mtx);
806
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807/*
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100808 * For any present drive:
809 * - allocate the block device queue
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100810 */
Elias Oltmannse415e492008-10-13 21:39:45 +0200811static int ide_port_setup_devices(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100812{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100813 ide_drive_t *drive;
Elias Oltmannse415e492008-10-13 21:39:45 +0200814 int i, j = 0;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100815
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200816 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100817 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100818 if (ide_init_queue(drive)) {
819 printk(KERN_ERR "ide: failed to init %s\n",
820 drive->name);
Elias Oltmannse415e492008-10-13 21:39:45 +0200821 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100822 continue;
823 }
824
Elias Oltmannse415e492008-10-13 21:39:45 +0200825 j++;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100826 }
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200827 mutex_unlock(&ide_cfg_mtx);
Elias Oltmannse415e492008-10-13 21:39:45 +0200828
829 return j;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100830}
831
Bartlomiej Zolnierkiewiczffc36c72009-06-23 03:43:00 -0700832static void ide_host_enable_irqs(struct ide_host *host)
833{
834 ide_hwif_t *hwif;
835 int i;
836
837 ide_host_for_each_port(i, hwif, host) {
838 if (hwif == NULL)
839 continue;
840
841 /* clear any pending IRQs */
842 hwif->tp_ops->read_status(hwif);
843
844 /* unmask IRQs */
845 if (hwif->io_ports.ctl_addr)
846 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
847 }
848}
849
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100850/*
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100851 * This routine sets up the IRQ for an IDE interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 */
853static int init_irq (ide_hwif_t *hwif)
854{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200855 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz255115fb2009-03-27 12:46:27 +0100856 struct ide_host *host = hwif->host;
857 irq_handler_t irq_handler = host->irq_handler;
858 int sa = host->irq_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Stanislaw Gruszka849d7132009-03-05 16:10:57 +0100860 if (irq_handler == NULL)
861 irq_handler = ide_intr;
862
Stanislaw Gruszka849d7132009-03-05 16:10:57 +0100863 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100864 goto out_up;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
Adrian Bunk7b892802008-02-06 01:36:29 -0800866#if !defined(__mc68000__)
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200867 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200868 io_ports->data_addr, io_ports->status_addr,
869 io_ports->ctl_addr, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870#else
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200871 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200872 io_ports->data_addr, hwif->irq);
Adrian Bunk7b892802008-02-06 01:36:29 -0800873#endif /* __mc68000__ */
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100874 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
875 printk(KERN_CONT " (serialized)");
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200876 printk(KERN_CONT "\n");
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879out_up:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 return 1;
881}
882
883static int ata_lock(dev_t dev, void *data)
884{
885 /* FIXME: we want to pin hwif down */
886 return 0;
887}
888
889static struct kobject *ata_probe(dev_t dev, int *part, void *data)
890{
891 ide_hwif_t *hwif = data;
892 int unit = *part >> PARTN_BITS;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100893 ide_drive_t *drive = hwif->devices[unit];
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200894
895 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 return NULL;
897
898 if (drive->media == ide_disk)
899 request_module("ide-disk");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 if (drive->media == ide_cdrom || drive->media == ide_optical)
901 request_module("ide-cd");
902 if (drive->media == ide_tape)
903 request_module("ide-tape");
904 if (drive->media == ide_floppy)
905 request_module("ide-floppy");
906
907 return NULL;
908}
909
910static struct kobject *exact_match(dev_t dev, int *part, void *data)
911{
912 struct gendisk *p = data;
913 *part &= (1 << PARTN_BITS) - 1;
Tejun Heoed9e1982008-08-25 19:56:05 +0900914 return &disk_to_dev(p)->kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915}
916
917static int exact_lock(dev_t dev, void *data)
918{
919 struct gendisk *p = data;
920
921 if (!get_disk(p))
922 return -1;
923 return 0;
924}
925
926void ide_register_region(struct gendisk *disk)
927{
928 blk_register_region(MKDEV(disk->major, disk->first_minor),
929 disk->minors, NULL, exact_match, exact_lock, disk);
930}
931
932EXPORT_SYMBOL_GPL(ide_register_region);
933
934void ide_unregister_region(struct gendisk *disk)
935{
936 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
937 disk->minors);
938}
939
940EXPORT_SYMBOL_GPL(ide_unregister_region);
941
942void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
943{
944 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200945 unsigned int unit = drive->dn & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946
947 disk->major = hwif->major;
948 disk->first_minor = unit << PARTN_BITS;
949 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
950 disk->queue = drive->queue;
951}
952
953EXPORT_SYMBOL_GPL(ide_init_disk);
954
955static void drive_release_dev (struct device *dev)
956{
957 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
958
Bartlomiej Zolnierkiewicz5b0c4b32008-04-18 00:46:22 +0200959 ide_proc_unregister_device(drive);
960
Bartlomiej Zolnierkiewiczb5479162009-03-31 20:15:25 +0200961 blk_cleanup_queue(drive->queue);
962 drive->queue = NULL;
963
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200964 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200965
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800966 complete(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967}
968
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969static int hwif_init(ide_hwif_t *hwif)
970{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 if (!hwif->irq) {
Bartlomiej Zolnierkiewicz8b07ed22009-03-24 23:22:52 +0100972 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
973 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 if (register_blkdev(hwif->major, hwif->name))
977 return 0;
978
979 if (!hwif->sg_max_nents)
980 hwif->sg_max_nents = PRD_ENTRIES;
981
Jens Axboe45711f12007-10-22 21:19:53 +0200982 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 GFP_KERNEL);
984 if (!hwif->sg_table) {
985 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
986 goto out;
987 }
Jens Axboe45711f12007-10-22 21:19:53 +0200988
989 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 if (init_irq(hwif)) {
Bartlomiej Zolnierkiewicz8b07ed22009-03-24 23:22:52 +0100992 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
993 hwif->name, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 goto out;
995 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Bartlomiej Zolnierkiewicz3a4e7c92008-02-02 19:56:40 +0100997 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
998 THIS_MODULE, ata_probe, ata_lock, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 return 1;
1000
1001out:
1002 unregister_blkdev(hwif->major, hwif->name);
1003 return 0;
1004}
1005
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001006static void hwif_register_devices(ide_hwif_t *hwif)
1007{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001008 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001009 unsigned int i;
1010
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +01001011 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001012 struct device *dev = &drive->gendev;
1013 int ret;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001014
Kay Sieversdc09c782008-12-29 20:27:36 +01001015 dev_set_name(dev, "%u.%u", hwif->index, i);
Greg Kroah-Hartmanfcb52072009-04-30 14:43:31 -07001016 dev_set_drvdata(dev, drive);
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001017 dev->parent = &hwif->gendev;
1018 dev->bus = &ide_bus_type;
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001019 dev->release = drive_release_dev;
1020
1021 ret = device_register(dev);
1022 if (ret < 0)
1023 printk(KERN_WARNING "IDE: %s: device_register error: "
1024 "%d\n", __func__, ret);
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001025 }
1026}
1027
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001028static void ide_port_init_devices(ide_hwif_t *hwif)
1029{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001030 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001031 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001032 int i;
1033
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001034 ide_port_for_each_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +02001035 drive->dn = i + hwif->channel * 2;
1036
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001037 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1038 drive->io_32bit = 1;
Bartlomiej Zolnierkiewicz7610c4f2009-03-24 23:22:38 +01001039 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
1040 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001041 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001042 drive->dev_flags |= IDE_DFLAG_UNMASK;
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +01001043 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001044 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
Bartlomiej Zolnierkiewicz1f2cf8b2008-02-02 19:56:40 +01001045
Bartlomiej Zolnierkiewicze6d95bd2008-07-16 20:33:42 +02001046 if (port_ops && port_ops->init_dev)
1047 port_ops->init_dev(drive);
1048 }
Joao Ramos60293362009-05-17 17:22:54 +02001049
1050 ide_port_for_each_dev(i, drive, hwif) {
1051 /*
1052 * default to PIO Mode 0 before we figure out
1053 * the most suited mode for the attached device
1054 */
1055 if (port_ops && port_ops->set_pio_mode)
1056 port_ops->set_pio_mode(drive, 0);
1057 }
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001058}
1059
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001060static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1061 const struct ide_port_info *d)
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001062{
Adrian Bunkb7691642008-06-10 20:56:36 +02001063 hwif->channel = port;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001064
Bartlomiej Zolnierkiewicz29e52cf2009-05-17 19:12:22 +02001065 hwif->chipset = d->chipset ? d->chipset : ide_pci;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001066
1067 if (d->init_iops)
1068 d->init_iops(hwif);
1069
Bartlomiej Zolnierkiewicz23f8e4b2008-05-01 14:08:51 +02001070 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1071 hwif->host_flags |= d->host_flags;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001072 hwif->pio_mask = d->pio_mask;
1073
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001074 if (d->tp_ops)
1075 hwif->tp_ops = d->tp_ops;
1076
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001077 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
Bartlomiej Zolnierkiewicz2787cb82009-03-27 12:46:28 +01001078 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001079 hwif->port_ops = d->port_ops;
1080
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001081 hwif->swdma_mask = d->swdma_mask;
1082 hwif->mwdma_mask = d->mwdma_mask;
1083 hwif->ultra_mask = d->udma_mask;
1084
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001085 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1086 int rc;
1087
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001088 hwif->dma_ops = d->dma_ops;
1089
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001090 if (d->init_dma)
1091 rc = d->init_dma(hwif, d);
1092 else
1093 rc = ide_hwif_setup_dma(hwif, d);
1094
1095 if (rc < 0) {
1096 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001097
1098 hwif->dma_ops = NULL;
Bartlomiej Zolnierkiewiczebb00fb2008-07-23 19:55:51 +02001099 hwif->dma_base = 0;
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001100 hwif->swdma_mask = 0;
1101 hwif->mwdma_mask = 0;
1102 hwif->ultra_mask = 0;
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001103 }
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001104 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001105
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001106 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
Bartlomiej Zolnierkiewicz702c0262008-12-29 20:27:36 +01001107 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
1108 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001109
Bartlomiej Zolnierkiewicz6b492492008-12-29 20:27:34 +01001110 if (d->max_sectors)
1111 hwif->rqsize = d->max_sectors;
Bartlomiej Zolnierkiewicz70775e92009-03-27 12:46:18 +01001112 else {
1113 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1114 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1115 hwif->rqsize = 256;
1116 else
1117 hwif->rqsize = 65536;
1118 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001119
1120 /* call chipset specific routine for each enabled port */
1121 if (d->init_hwif)
1122 d->init_hwif(hwif);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001123}
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001124
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001125static void ide_port_cable_detect(ide_hwif_t *hwif)
1126{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001127 const struct ide_port_ops *port_ops = hwif->port_ops;
1128
1129 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001130 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001131 hwif->cbl = port_ops->cable_detect(hwif);
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001132 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001133}
1134
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001135static const u8 ide_hwif_to_major[] =
1136 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
1137 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
1138
1139static void ide_port_init_devices_data(ide_hwif_t *hwif)
1140{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001141 ide_drive_t *drive;
1142 int i;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001143
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001144 ide_port_for_each_dev(i, drive, hwif) {
1145 u8 j = (hwif->index * MAX_DRIVES) + i;
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001146 u16 *saved_id = drive->id;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001147
1148 memset(drive, 0, sizeof(*drive));
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001149 memset(saved_id, 0, SECTOR_SIZE);
1150 drive->id = saved_id;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001151
1152 drive->media = ide_disk;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001153 drive->select = (i << 4) | ATA_DEVICE_OBS;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001154 drive->hwif = hwif;
1155 drive->ready_stat = ATA_DRDY;
1156 drive->bad_wstat = BAD_W_STAT;
Bartlomiej Zolnierkiewiczca1b96e2009-05-17 19:12:21 +02001157 drive->special_flags = IDE_SFLAG_RECALIBRATE |
1158 IDE_SFLAG_SET_GEOMETRY;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001159 drive->name[0] = 'h';
1160 drive->name[1] = 'd';
1161 drive->name[2] = 'a' + j;
1162 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
1163
1164 INIT_LIST_HEAD(&drive->list);
1165 init_completion(&drive->gendev_rel_comp);
1166 }
1167}
1168
1169static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
1170{
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001171 /* fill in any non-zero initial values */
1172 hwif->index = index;
1173 hwif->major = ide_hwif_to_major[index];
1174
1175 hwif->name[0] = 'i';
1176 hwif->name[1] = 'd';
1177 hwif->name[2] = 'e';
1178 hwif->name[3] = '0' + index;
1179
Bartlomiej Zolnierkiewicz73629512009-03-24 23:22:39 +01001180 spin_lock_init(&hwif->lock);
1181
1182 init_timer(&hwif->timer);
1183 hwif->timer.function = &ide_timer_expiry;
1184 hwif->timer.data = (unsigned long)hwif;
1185
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001186 init_completion(&hwif->gendev_rel_comp);
1187
1188 hwif->tp_ops = &default_tp_ops;
1189
1190 ide_port_init_devices_data(hwif);
1191}
1192
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001193static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001194{
1195 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
1196 hwif->irq = hw->irq;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001197 hwif->dev = hw->dev;
1198 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001199 hwif->config_data = hw->config;
1200}
1201
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001202static unsigned int ide_indexes;
1203
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001204/**
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001205 * ide_find_port_slot - find free port slot
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001206 * @d: IDE port info
1207 *
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001208 * Return the new port slot index or -ENOENT if we are out of free slots.
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001209 */
1210
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001211static int ide_find_port_slot(const struct ide_port_info *d)
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001212{
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001213 int idx = -ENOENT;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001214 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
Joe Perchesa419aef2009-08-18 11:18:35 -07001215 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001216
1217 /*
1218 * Claim an unassigned slot.
1219 *
1220 * Give preference to claiming other slots before claiming ide0/ide1,
1221 * just in case there's another interface yet-to-be-scanned
1222 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1223 *
1224 * Unless there is a bootable card that does not use the standard
1225 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1226 */
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001227 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewicz75d21ff2008-10-13 21:39:33 +02001228 if (bootable) {
1229 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1230 idx = ffz(ide_indexes | i);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001231 } else {
Bartlomiej Zolnierkiewicz75d21ff2008-10-13 21:39:33 +02001232 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1233 idx = ffz(ide_indexes | 3);
1234 else if ((ide_indexes & 3) != 3)
1235 idx = ffz(ide_indexes);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001236 }
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001237 if (idx >= 0)
1238 ide_indexes |= (1 << idx);
1239 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001240
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001241 return idx;
1242}
Bartlomiej Zolnierkiewiczeb3aff52008-07-16 20:33:42 +02001243
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001244static void ide_free_port_slot(int idx)
1245{
1246 mutex_lock(&ide_cfg_mtx);
1247 ide_indexes &= ~(1 << idx);
1248 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001249}
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001250
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001251static void ide_port_free_devices(ide_hwif_t *hwif)
1252{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001253 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001254 int i;
1255
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001256 ide_port_for_each_dev(i, drive, hwif) {
1257 kfree(drive->id);
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001258 kfree(drive);
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001259 }
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001260}
1261
1262static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
1263{
1264 int i;
1265
1266 for (i = 0; i < MAX_DRIVES; i++) {
1267 ide_drive_t *drive;
1268
1269 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
1270 if (drive == NULL)
1271 goto out_nomem;
1272
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001273 /*
1274 * In order to keep things simple we have an id
1275 * block for all drives at all times. If the device
1276 * is pre ATA or refuses ATA/ATAPI identify we
1277 * will add faked data to this.
1278 *
1279 * Also note that 0 everywhere means "can't do X"
1280 */
1281 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
1282 if (drive->id == NULL)
1283 goto out_nomem;
1284
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001285 hwif->devices[i] = drive;
1286 }
1287 return 0;
1288
1289out_nomem:
1290 ide_port_free_devices(hwif);
1291 return -ENOMEM;
1292}
1293
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001294struct ide_host *ide_host_alloc(const struct ide_port_info *d,
1295 struct ide_hw **hws, unsigned int n_ports)
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001296{
1297 struct ide_host *host;
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001298 struct device *dev = hws[0] ? hws[0]->dev : NULL;
1299 int node = dev ? dev_to_node(dev) : -1;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001300 int i;
1301
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001302 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001303 if (host == NULL)
1304 return NULL;
1305
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +02001306 for (i = 0; i < n_ports; i++) {
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001307 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001308 int idx;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001309
1310 if (hws[i] == NULL)
1311 continue;
1312
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001313 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
Bartlomiej Zolnierkiewicz18de1012008-07-23 19:55:58 +02001314 if (hwif == NULL)
1315 continue;
1316
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001317 if (ide_port_alloc_devices(hwif, node) < 0) {
1318 kfree(hwif);
1319 continue;
1320 }
1321
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001322 idx = ide_find_port_slot(d);
1323 if (idx < 0) {
1324 printk(KERN_ERR "%s: no free slot for interface\n",
1325 d ? d->name : "ide");
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001326 ide_port_free_devices(hwif);
Bartlomiej Zolnierkiewicz18de1012008-07-23 19:55:58 +02001327 kfree(hwif);
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001328 continue;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001329 }
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001330
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001331 ide_init_port_data(hwif, idx);
1332
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +02001333 hwif->host = host;
1334
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001335 host->ports[i] = hwif;
1336 host->n_ports++;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001337 }
1338
1339 if (host->n_ports == 0) {
1340 kfree(host);
1341 return NULL;
1342 }
1343
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001344 host->dev[0] = dev;
Bartlomiej Zolnierkiewicz6cdf6eb2008-07-24 22:53:14 +02001345
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +02001346 if (d) {
1347 host->init_chipset = d->init_chipset;
Bartlomiej Zolnierkiewicze354c1d2009-03-27 12:46:22 +01001348 host->get_lock = d->get_lock;
1349 host->release_lock = d->release_lock;
Bartlomiej Zolnierkiewiczef0b0422008-07-24 22:53:19 +02001350 host->host_flags = d->host_flags;
Geert Uytterhoevenaa075732009-04-08 14:12:47 +02001351 host->irq_flags = d->irq_flags;
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +02001352 }
Bartlomiej Zolnierkiewiczef0b0422008-07-24 22:53:19 +02001353
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001354 return host;
1355}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001356EXPORT_SYMBOL_GPL(ide_host_alloc);
1357
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001358static void ide_port_free(ide_hwif_t *hwif)
1359{
1360 ide_port_free_devices(hwif);
1361 ide_free_port_slot(hwif->index);
1362 kfree(hwif);
1363}
1364
1365static void ide_disable_port(ide_hwif_t *hwif)
1366{
1367 struct ide_host *host = hwif->host;
1368 int i;
1369
1370 printk(KERN_INFO "%s: disabling port\n", hwif->name);
1371
1372 for (i = 0; i < MAX_HOST_PORTS; i++) {
1373 if (host->ports[i] == hwif) {
1374 host->ports[i] = NULL;
1375 host->n_ports--;
1376 }
1377 }
1378
1379 ide_port_free(hwif);
1380}
1381
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001382int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001383 struct ide_hw **hws)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001384{
1385 ide_hwif_t *hwif, *mate = NULL;
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001386 int i, j = 0;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001387
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001388 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001389 if (hwif == NULL) {
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001390 mate = NULL;
1391 continue;
1392 }
1393
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001394 ide_init_port_hw(hwif, hws[i]);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001395 ide_port_apply_params(hwif);
1396
Bartlomiej Zolnierkiewicz0a6e49e2009-03-27 12:46:27 +01001397 if ((i & 1) && mate) {
1398 hwif->mate = mate;
1399 mate->mate = hwif;
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001400 }
1401
Bartlomiej Zolnierkiewicz0a6e49e2009-03-27 12:46:27 +01001402 mate = (i & 1) ? NULL : hwif;
1403
1404 ide_init_port(hwif, i & 1, d);
1405 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001406
1407 hwif->port_flags |= IDE_PFLAG_PROBING;
1408
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001409 ide_port_init_devices(hwif);
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001410 }
1411
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001412 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001413 if (hwif == NULL)
1414 continue;
Bartlomiej Zolnierkiewicz139ddfc2008-02-01 23:09:36 +01001415
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001416 if (ide_probe_port(hwif) == 0)
1417 hwif->present = 1;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001418
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001419 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1420
Bartlomiej Zolnierkiewiczc094ea02009-03-27 12:46:28 +01001421 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
1422 hwif->mate == NULL || hwif->mate->present == 0) {
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001423 if (ide_register_port(hwif)) {
1424 ide_disable_port(hwif);
1425 continue;
1426 }
1427 }
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001428
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001429 if (hwif->present)
1430 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001431 }
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001432
Bartlomiej Zolnierkiewiczffc36c72009-06-23 03:43:00 -07001433 ide_host_enable_irqs(host);
1434
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001435 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001436 if (hwif == NULL)
1437 continue;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001438
1439 if (hwif_init(hwif) == 0) {
1440 printk(KERN_INFO "%s: failed to initialize IDE "
1441 "interface\n", hwif->name);
Ian Campbell51d6ac72009-02-02 20:12:22 +01001442 device_unregister(&hwif->gendev);
1443 ide_disable_port(hwif);
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001444 continue;
1445 }
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001446
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001447 if (hwif->present)
Elias Oltmannse415e492008-10-13 21:39:45 +02001448 if (ide_port_setup_devices(hwif) == 0) {
1449 hwif->present = 0;
1450 continue;
1451 }
1452
1453 j++;
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +02001454
Bartlomiej Zolnierkiewicz8b803bd2009-03-24 23:22:41 +01001455 ide_acpi_init_port(hwif);
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001456
1457 if (hwif->present)
1458 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001459 }
1460
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001461 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001462 if (hwif == NULL)
1463 continue;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001464
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001465 if (hwif->present)
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001466 hwif_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001467 }
1468
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001469 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001470 if (hwif == NULL)
1471 continue;
Bartlomiej Zolnierkiewicz327617e2008-02-02 19:56:43 +01001472
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001473 ide_sysfs_register_port(hwif);
1474 ide_proc_register_port(hwif);
1475
1476 if (hwif->present)
Bartlomiej Zolnierkiewiczd9270a32008-02-02 19:56:43 +01001477 ide_proc_port_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001478 }
1479
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001480 return j ? 0 : -1;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001481}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001482EXPORT_SYMBOL_GPL(ide_host_register);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001483
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001484int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +02001485 unsigned int n_ports, struct ide_host **hostp)
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001486{
1487 struct ide_host *host;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001488 int rc;
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001489
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +02001490 host = ide_host_alloc(d, hws, n_ports);
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001491 if (host == NULL)
1492 return -ENOMEM;
1493
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001494 rc = ide_host_register(host, d, hws);
1495 if (rc) {
1496 ide_host_free(host);
1497 return rc;
1498 }
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001499
1500 if (hostp)
1501 *hostp = host;
1502
1503 return 0;
1504}
1505EXPORT_SYMBOL_GPL(ide_host_add);
1506
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001507static void __ide_port_unregister_devices(ide_hwif_t *hwif)
1508{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001509 ide_drive_t *drive;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001510 int i;
1511
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +01001512 ide_port_for_each_present_dev(i, drive, hwif) {
1513 device_unregister(&drive->gendev);
1514 wait_for_completion(&drive->gendev_rel_comp);
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001515 }
1516}
1517
1518void ide_port_unregister_devices(ide_hwif_t *hwif)
1519{
1520 mutex_lock(&ide_cfg_mtx);
1521 __ide_port_unregister_devices(hwif);
1522 hwif->present = 0;
1523 ide_port_init_devices_data(hwif);
1524 mutex_unlock(&ide_cfg_mtx);
1525}
1526EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
1527
1528/**
1529 * ide_unregister - free an IDE interface
1530 * @hwif: IDE interface
1531 *
1532 * Perform the final unregister of an IDE interface.
1533 *
1534 * Locking:
1535 * The caller must not hold the IDE locks.
1536 *
1537 * It is up to the caller to be sure there is no pending I/O here,
1538 * and that the interface will not be reopened (present/vanishing
1539 * locking isn't yet done BTW).
1540 */
1541
1542static void ide_unregister(ide_hwif_t *hwif)
1543{
1544 BUG_ON(in_interrupt());
1545 BUG_ON(irqs_disabled());
1546
1547 mutex_lock(&ide_cfg_mtx);
1548
1549 if (hwif->present) {
1550 __ide_port_unregister_devices(hwif);
1551 hwif->present = 0;
1552 }
1553
1554 ide_proc_unregister_port(hwif);
1555
1556 free_irq(hwif->irq, hwif);
1557
1558 device_unregister(hwif->portdev);
1559 device_unregister(&hwif->gendev);
1560 wait_for_completion(&hwif->gendev_rel_comp);
1561
1562 /*
1563 * Remove us from the kernel's knowledge
1564 */
1565 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
1566 kfree(hwif->sg_table);
1567 unregister_blkdev(hwif->major, hwif->name);
1568
1569 ide_release_dma_engine(hwif);
1570
1571 mutex_unlock(&ide_cfg_mtx);
1572}
1573
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001574void ide_host_free(struct ide_host *host)
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001575{
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001576 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001577 int i;
1578
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001579 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001580 if (hwif)
1581 ide_port_free(hwif);
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001582 }
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001583
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001584 kfree(host);
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001585}
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001586EXPORT_SYMBOL_GPL(ide_host_free);
1587
1588void ide_host_remove(struct ide_host *host)
1589{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001590 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001591 int i;
1592
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001593 ide_host_for_each_port(i, hwif, host) {
1594 if (hwif)
1595 ide_unregister(hwif);
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001596 }
1597
1598 ide_host_free(host);
1599}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001600EXPORT_SYMBOL_GPL(ide_host_remove);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001601
1602void ide_port_scan(ide_hwif_t *hwif)
1603{
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001604 int rc;
1605
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001606 ide_port_apply_params(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001607 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001608
1609 hwif->port_flags |= IDE_PFLAG_PROBING;
1610
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001611 ide_port_init_devices(hwif);
1612
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001613 rc = ide_probe_port(hwif);
1614
1615 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1616
1617 if (rc < 0)
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001618 return;
1619
1620 hwif->present = 1;
1621
1622 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001623 ide_port_setup_devices(hwif);
Bartlomiej Zolnierkiewicze630fcb2009-01-06 17:21:00 +01001624 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001625 hwif_register_devices(hwif);
1626 ide_proc_port_register_devices(hwif);
1627}
1628EXPORT_SYMBOL_GPL(ide_port_scan);