2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/string.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
13 #include <linux/interrupt.h>
14 #include <linux/major.h>
15 #include <linux/errno.h>
16 #include <linux/genhd.h>
17 #include <linux/blkpg.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
25 #include <asm/byteorder.h>
27 #include <asm/uaccess.h>
30 void SELECT_DRIVE(ide_drive_t *drive)
32 drive->hwif->tp_ops->dev_select(drive);
35 void SELECT_MASK(ide_drive_t *drive, int mask)
37 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
39 if (port_ops && port_ops->maskproc)
40 port_ops->maskproc(drive, mask);
43 u8 ide_read_error(ide_drive_t *drive)
47 memset(&cmd, 0, sizeof(cmd));
48 cmd.tf_flags = IDE_TFLAG_IN_ERROR;
50 drive->hwif->tp_ops->tf_read(drive, &cmd);
54 EXPORT_SYMBOL_GPL(ide_read_error);
56 void ide_fix_driveid(u16 *id)
58 #ifndef __LITTLE_ENDIAN
62 for (i = 0; i < 256; i++)
63 id[i] = __le16_to_cpu(id[i]);
65 # error "Please fix <asm/byteorder.h>"
71 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
72 * removing leading/trailing blanks and compressing internal blanks.
73 * It is primarily used to tidy up the model name/number fields as
74 * returned by the ATA_CMD_ID_ATA[PI] commands.
77 void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
79 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
82 /* convert from big-endian to host byte order */
83 for (p = s ; p != end ; p += 2)
84 be16_to_cpus((u16 *) p);
87 /* strip leading blanks */
89 while (s != end && *s == ' ')
91 /* compress internal blanks and strip trailing blanks */
92 while (s != end && *s) {
93 if (*s++ != ' ' || (s != end && *s && *s != ' '))
96 /* wipe out trailing garbage */
100 EXPORT_SYMBOL(ide_fixstring);
103 * This routine busy-waits for the drive status to be not "busy".
104 * It then checks the status for all of the "good" bits and none
105 * of the "bad" bits, and if all is okay it returns 0. All other
106 * cases return error -- caller may then invoke ide_error().
108 * This routine should get fixed to not hog the cpu during extra long waits..
109 * That could be done by busy-waiting for the first jiffy or two, and then
110 * setting a timer to wake up at half second intervals thereafter,
111 * until timeout is achieved, before timing out.
113 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
114 unsigned long timeout, u8 *rstat)
116 ide_hwif_t *hwif = drive->hwif;
117 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
122 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
123 stat = tp_ops->read_status(hwif);
125 if (stat & ATA_BUSY) {
126 local_save_flags(flags);
127 local_irq_enable_in_hardirq();
129 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
130 if (time_after(jiffies, timeout)) {
132 * One last read after the timeout in case
133 * heavy interrupt load made us not make any
134 * progress during the timeout..
136 stat = tp_ops->read_status(hwif);
137 if ((stat & ATA_BUSY) == 0)
140 local_irq_restore(flags);
145 local_irq_restore(flags);
148 * Allow status to settle, then read it again.
149 * A few rare drives vastly violate the 400ns spec here,
150 * so we'll wait up to 10usec for a "good" status
151 * rather than expensively fail things immediately.
152 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
154 for (i = 0; i < 10; i++) {
156 stat = tp_ops->read_status(hwif);
158 if (OK_STAT(stat, good, bad)) {
168 * In case of error returns error value after doing "*startstop = ide_error()".
169 * The caller should return the updated value of "startstop" in this case,
170 * "startstop" is unchanged when the function returns 0.
172 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
173 u8 bad, unsigned long timeout)
178 /* bail early if we've exceeded max_failures */
179 if (drive->max_failures && (drive->failures > drive->max_failures)) {
180 *startstop = ide_stopped;
184 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
187 char *s = (err == -EBUSY) ? "status timeout" : "status error";
188 *startstop = ide_error(drive, s, stat);
193 EXPORT_SYMBOL(ide_wait_stat);
196 * ide_in_drive_list - look for drive in black/white list
197 * @id: drive identifier
198 * @table: list to inspect
200 * Look for a drive in the blacklist and the whitelist tables
201 * Returns 1 if the drive is found in the table.
204 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
206 for ( ; table->id_model; table++)
207 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
208 (!table->id_firmware ||
209 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
213 EXPORT_SYMBOL_GPL(ide_in_drive_list);
216 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
217 * We list them here and depend on the device side cable detection for them.
219 * Some optical devices with the buggy firmwares have the same problem.
221 static const struct drive_list_entry ivb_list[] = {
222 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
223 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
224 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
225 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
226 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
227 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
228 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
229 { "SAMSUNG SP0822N" , "WA100-10" },
234 * All hosts that use the 80c ribbon must use!
235 * The name is derived from upper byte of word 93 and the 80c ribbon.
237 u8 eighty_ninty_three(ide_drive_t *drive)
239 ide_hwif_t *hwif = drive->hwif;
241 int ivb = ide_in_drive_list(id, ivb_list);
243 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
247 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
250 if (ata_id_is_sata(id) && !ivb)
253 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
258 * - change master/slave IDENTIFY order
259 * - force bit13 (80c cable present) check also for !ivb devices
260 * (unless the slave device is pre-ATA3)
262 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
263 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
267 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
270 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
271 "limiting max speed to UDMA33\n",
273 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
275 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
280 int ide_driveid_update(ide_drive_t *drive)
285 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
289 SELECT_MASK(drive, 1);
290 rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id);
291 SELECT_MASK(drive, 0);
296 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
297 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
298 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
299 drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES];
300 /* anything more ? */
304 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
309 SELECT_MASK(drive, 0);
311 printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
316 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
318 ide_hwif_t *hwif = drive->hwif;
319 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
320 u16 *id = drive->id, i;
325 #ifdef CONFIG_BLK_DEV_IDEDMA
326 if (hwif->dma_ops) /* check if host supports DMA */
327 hwif->dma_ops->dma_host_set(drive, 0);
330 /* Skip setting PIO flow-control modes on pre-EIDE drives */
331 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
335 * Don't use ide_wait_cmd here - it will
336 * attempt to set_geometry and recalibrate,
337 * but for some reason these don't work at
338 * this point (lost interrupt).
342 * FIXME: we race against the running IRQ here if
343 * this is called from non IRQ context. If we use
344 * disable_irq() we hang on the error path. Work
347 disable_irq_nosync(hwif->irq);
351 SELECT_MASK(drive, 1);
353 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
355 memset(&cmd, 0, sizeof(cmd));
356 cmd.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
357 cmd.tf.feature = SETFEATURES_XFER;
358 cmd.tf.nsect = speed;
360 tp_ops->tf_load(drive, &cmd);
362 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
364 if (drive->quirk_list == 2)
365 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
367 error = __ide_wait_stat(drive, drive->ready_stat,
368 ATA_BUSY | ATA_DRQ | ATA_ERR,
371 SELECT_MASK(drive, 0);
373 enable_irq(hwif->irq);
376 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
380 if (speed >= XFER_SW_DMA_0) {
381 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
382 id[ATA_ID_MWDMA_MODES] &= ~0x0700;
383 id[ATA_ID_SWDMA_MODES] &= ~0x0700;
384 if (ata_id_is_cfa(id))
385 id[ATA_ID_CFA_MODES] &= ~0x0E00;
386 } else if (ata_id_is_cfa(id))
387 id[ATA_ID_CFA_MODES] &= ~0x01C0;
390 #ifdef CONFIG_BLK_DEV_IDEDMA
391 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
392 hwif->dma_ops->dma_host_set(drive, 1);
393 else if (hwif->dma_ops) /* check if host supports DMA */
394 ide_dma_off_quietly(drive);
397 if (speed >= XFER_UDMA_0) {
398 i = 1 << (speed - XFER_UDMA_0);
399 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
400 } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
401 i = speed - XFER_MW_DMA_2;
402 id[ATA_ID_CFA_MODES] |= i << 9;
403 } else if (speed >= XFER_MW_DMA_0) {
404 i = 1 << (speed - XFER_MW_DMA_0);
405 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
406 } else if (speed >= XFER_SW_DMA_0) {
407 i = 1 << (speed - XFER_SW_DMA_0);
408 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
409 } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
410 i = speed - XFER_PIO_4;
411 id[ATA_ID_CFA_MODES] |= i << 6;
414 if (!drive->init_speed)
415 drive->init_speed = speed;
416 drive->current_speed = speed;
421 * This should get invoked any time we exit the driver to
422 * wait for an interrupt response from a drive. handler() points
423 * at the appropriate code to handle the next interrupt, and a
424 * timer is started to prevent us from waiting forever in case
425 * something goes wrong (see the ide_timer_expiry() handler later on).
427 * See also ide_execute_command
429 void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
430 unsigned int timeout)
432 ide_hwif_t *hwif = drive->hwif;
434 BUG_ON(hwif->handler);
435 hwif->handler = handler;
436 hwif->timer.expires = jiffies + timeout;
437 hwif->req_gen_timer = hwif->req_gen;
438 add_timer(&hwif->timer);
441 void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
442 unsigned int timeout)
444 ide_hwif_t *hwif = drive->hwif;
447 spin_lock_irqsave(&hwif->lock, flags);
448 __ide_set_handler(drive, handler, timeout);
449 spin_unlock_irqrestore(&hwif->lock, flags);
451 EXPORT_SYMBOL(ide_set_handler);
454 * ide_execute_command - execute an IDE command
455 * @drive: IDE drive to issue the command against
457 * @handler: handler for next phase
458 * @timeout: timeout for command
460 * Helper function to issue an IDE command. This handles the
461 * atomicity requirements, command timing and ensures that the
462 * handler and IRQ setup do not race. All IDE command kick off
463 * should go via this function or do equivalent locking.
466 void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
467 ide_handler_t *handler, unsigned timeout)
469 ide_hwif_t *hwif = drive->hwif;
472 spin_lock_irqsave(&hwif->lock, flags);
473 if ((cmd->protocol != ATAPI_PROT_DMA &&
474 cmd->protocol != ATAPI_PROT_PIO) ||
475 (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
476 __ide_set_handler(drive, handler, timeout);
477 hwif->tp_ops->exec_command(hwif, cmd->tf.command);
479 * Drive takes 400nS to respond, we must avoid the IRQ being
480 * serviced before that.
482 * FIXME: we could skip this delay with care on non shared devices
485 spin_unlock_irqrestore(&hwif->lock, flags);
489 * ide_wait_not_busy() waits for the currently selected device on the hwif
490 * to report a non-busy status, see comments in ide_probe_port().
492 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
498 * Turn this into a schedule() sleep once I'm sure
499 * about locking issues (2.5 work ?).
502 stat = hwif->tp_ops->read_status(hwif);
503 if ((stat & ATA_BUSY) == 0)
506 * Assume a value of 0xff means nothing is connected to
507 * the interface and it doesn't implement the pull-down
512 touch_softlockup_watchdog();
513 touch_nmi_watchdog();