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536 lines
14 KiB
536 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2000-2002 Andre Hedrick <[email protected]> |
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* Copyright (C) 2003 Red Hat |
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* |
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*/ |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/string.h> |
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#include <linux/kernel.h> |
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#include <linux/timer.h> |
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#include <linux/mm.h> |
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#include <linux/interrupt.h> |
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#include <linux/major.h> |
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#include <linux/errno.h> |
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#include <linux/genhd.h> |
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#include <linux/blkpg.h> |
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#include <linux/slab.h> |
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#include <linux/pci.h> |
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#include <linux/delay.h> |
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#include <linux/ide.h> |
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#include <linux/bitops.h> |
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#include <linux/nmi.h> |
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#include <asm/byteorder.h> |
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#include <asm/irq.h> |
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#include <linux/uaccess.h> |
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#include <asm/io.h> |
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void SELECT_MASK(ide_drive_t *drive, int mask) |
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{ |
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const struct ide_port_ops *port_ops = drive->hwif->port_ops; |
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if (port_ops && port_ops->maskproc) |
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port_ops->maskproc(drive, mask); |
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} |
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u8 ide_read_error(ide_drive_t *drive) |
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{ |
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struct ide_taskfile tf; |
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drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR); |
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return tf.error; |
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} |
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EXPORT_SYMBOL_GPL(ide_read_error); |
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void ide_fix_driveid(u16 *id) |
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{ |
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#ifndef __LITTLE_ENDIAN |
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# ifdef __BIG_ENDIAN |
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int i; |
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for (i = 0; i < 256; i++) |
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id[i] = __le16_to_cpu(id[i]); |
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# else |
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# error "Please fix <asm/byteorder.h>" |
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# endif |
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#endif |
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} |
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/* |
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* ide_fixstring() cleans up and (optionally) byte-swaps a text string, |
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* removing leading/trailing blanks and compressing internal blanks. |
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* It is primarily used to tidy up the model name/number fields as |
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* returned by the ATA_CMD_ID_ATA[PI] commands. |
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*/ |
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void ide_fixstring(u8 *s, const int bytecount, const int byteswap) |
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{ |
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u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */ |
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if (byteswap) { |
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/* convert from big-endian to host byte order */ |
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for (p = s ; p != end ; p += 2) |
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be16_to_cpus((u16 *) p); |
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} |
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/* strip leading blanks */ |
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p = s; |
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while (s != end && *s == ' ') |
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++s; |
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/* compress internal blanks and strip trailing blanks */ |
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while (s != end && *s) { |
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if (*s++ != ' ' || (s != end && *s && *s != ' ')) |
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*p++ = *(s-1); |
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} |
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/* wipe out trailing garbage */ |
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while (p != end) |
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*p++ = '\0'; |
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} |
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EXPORT_SYMBOL(ide_fixstring); |
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/* |
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* This routine busy-waits for the drive status to be not "busy". |
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* It then checks the status for all of the "good" bits and none |
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* of the "bad" bits, and if all is okay it returns 0. All other |
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* cases return error -- caller may then invoke ide_error(). |
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* |
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* This routine should get fixed to not hog the cpu during extra long waits.. |
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* That could be done by busy-waiting for the first jiffy or two, and then |
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* setting a timer to wake up at half second intervals thereafter, |
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* until timeout is achieved, before timing out. |
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*/ |
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int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad, |
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unsigned long timeout, u8 *rstat) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
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unsigned long flags; |
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bool irqs_threaded = force_irqthreads; |
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int i; |
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u8 stat; |
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udelay(1); /* spec allows drive 400ns to assert "BUSY" */ |
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stat = tp_ops->read_status(hwif); |
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if (stat & ATA_BUSY) { |
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if (!irqs_threaded) { |
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local_save_flags(flags); |
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local_irq_enable_in_hardirq(); |
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} |
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timeout += jiffies; |
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while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) { |
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if (time_after(jiffies, timeout)) { |
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/* |
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* One last read after the timeout in case |
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* heavy interrupt load made us not make any |
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* progress during the timeout.. |
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*/ |
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stat = tp_ops->read_status(hwif); |
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if ((stat & ATA_BUSY) == 0) |
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break; |
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if (!irqs_threaded) |
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local_irq_restore(flags); |
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*rstat = stat; |
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return -EBUSY; |
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} |
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} |
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if (!irqs_threaded) |
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local_irq_restore(flags); |
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} |
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/* |
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* Allow status to settle, then read it again. |
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* A few rare drives vastly violate the 400ns spec here, |
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* so we'll wait up to 10usec for a "good" status |
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* rather than expensively fail things immediately. |
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* This fix courtesy of Matthew Faupel & Niccolo Rigacci. |
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*/ |
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for (i = 0; i < 10; i++) { |
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udelay(1); |
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stat = tp_ops->read_status(hwif); |
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if (OK_STAT(stat, good, bad)) { |
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*rstat = stat; |
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return 0; |
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} |
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} |
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*rstat = stat; |
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return -EFAULT; |
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} |
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/* |
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* In case of error returns error value after doing "*startstop = ide_error()". |
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* The caller should return the updated value of "startstop" in this case, |
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* "startstop" is unchanged when the function returns 0. |
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*/ |
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int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good, |
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u8 bad, unsigned long timeout) |
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{ |
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int err; |
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u8 stat; |
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/* bail early if we've exceeded max_failures */ |
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if (drive->max_failures && (drive->failures > drive->max_failures)) { |
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*startstop = ide_stopped; |
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return 1; |
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} |
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err = __ide_wait_stat(drive, good, bad, timeout, &stat); |
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if (err) { |
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char *s = (err == -EBUSY) ? "status timeout" : "status error"; |
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*startstop = ide_error(drive, s, stat); |
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} |
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return err; |
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} |
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EXPORT_SYMBOL(ide_wait_stat); |
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/** |
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* ide_in_drive_list - look for drive in black/white list |
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* @id: drive identifier |
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* @table: list to inspect |
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* |
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* Look for a drive in the blacklist and the whitelist tables |
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* Returns 1 if the drive is found in the table. |
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*/ |
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int ide_in_drive_list(u16 *id, const struct drive_list_entry *table) |
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{ |
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for ( ; table->id_model; table++) |
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if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) && |
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(!table->id_firmware || |
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strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware))) |
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return 1; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(ide_in_drive_list); |
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/* |
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* Early UDMA66 devices don't set bit14 to 1, only bit13 is valid. |
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* Some optical devices with the buggy firmwares have the same problem. |
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*/ |
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static const struct drive_list_entry ivb_list[] = { |
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{ "QUANTUM FIREBALLlct10 05" , "A03.0900" }, |
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{ "QUANTUM FIREBALLlct20 30" , "APL.0900" }, |
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{ "TSSTcorp CDDVDW SH-S202J" , "SB00" }, |
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{ "TSSTcorp CDDVDW SH-S202J" , "SB01" }, |
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{ "TSSTcorp CDDVDW SH-S202N" , "SB00" }, |
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{ "TSSTcorp CDDVDW SH-S202N" , "SB01" }, |
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{ "TSSTcorp CDDVDW SH-S202H" , "SB00" }, |
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{ "TSSTcorp CDDVDW SH-S202H" , "SB01" }, |
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{ "SAMSUNG SP0822N" , "WA100-10" }, |
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{ NULL , NULL } |
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}; |
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/* |
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* All hosts that use the 80c ribbon must use! |
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* The name is derived from upper byte of word 93 and the 80c ribbon. |
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*/ |
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u8 eighty_ninty_three(ide_drive_t *drive) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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u16 *id = drive->id; |
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int ivb = ide_in_drive_list(id, ivb_list); |
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if (hwif->cbl == ATA_CBL_SATA || hwif->cbl == ATA_CBL_PATA40_SHORT) |
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return 1; |
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if (ivb) |
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printk(KERN_DEBUG "%s: skipping word 93 validity check\n", |
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drive->name); |
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if (ata_id_is_sata(id) && !ivb) |
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return 1; |
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if (hwif->cbl != ATA_CBL_PATA80 && !ivb) |
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goto no_80w; |
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/* |
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* FIXME: |
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* - change master/slave IDENTIFY order |
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* - force bit13 (80c cable present) check also for !ivb devices |
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* (unless the slave device is pre-ATA3) |
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*/ |
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if (id[ATA_ID_HW_CONFIG] & 0x4000) |
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return 1; |
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if (ivb) { |
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const char *model = (char *)&id[ATA_ID_PROD]; |
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if (strstr(model, "TSSTcorp CDDVDW SH-S202")) { |
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/* |
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* These ATAPI devices always report 80c cable |
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* so we have to depend on the host in this case. |
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*/ |
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if (hwif->cbl == ATA_CBL_PATA80) |
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return 1; |
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} else { |
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/* Depend on the device side cable detection. */ |
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if (id[ATA_ID_HW_CONFIG] & 0x2000) |
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return 1; |
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} |
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} |
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no_80w: |
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if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED) |
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return 0; |
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printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " |
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"limiting max speed to UDMA33\n", |
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drive->name, |
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hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host"); |
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drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED; |
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return 0; |
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} |
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static const char *nien_quirk_list[] = { |
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"QUANTUM FIREBALLlct08 08", |
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"QUANTUM FIREBALLP KA6.4", |
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"QUANTUM FIREBALLP KA9.1", |
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"QUANTUM FIREBALLP KX13.6", |
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"QUANTUM FIREBALLP KX20.5", |
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"QUANTUM FIREBALLP KX27.3", |
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"QUANTUM FIREBALLP LM20.4", |
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"QUANTUM FIREBALLP LM20.5", |
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"FUJITSU MHZ2160BH G2", |
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NULL |
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}; |
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void ide_check_nien_quirk_list(ide_drive_t *drive) |
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{ |
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const char **list, *m = (char *)&drive->id[ATA_ID_PROD]; |
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for (list = nien_quirk_list; *list != NULL; list++) |
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if (strstr(m, *list) != NULL) { |
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drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK; |
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return; |
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} |
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} |
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int ide_driveid_update(ide_drive_t *drive) |
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{ |
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u16 *id; |
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int rc; |
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id = kmalloc(SECTOR_SIZE, GFP_ATOMIC); |
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if (id == NULL) |
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return 0; |
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SELECT_MASK(drive, 1); |
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rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id, 1); |
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SELECT_MASK(drive, 0); |
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if (rc) |
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goto out_err; |
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drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES]; |
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drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES]; |
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drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES]; |
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drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES]; |
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/* anything more ? */ |
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kfree(id); |
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return 1; |
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out_err: |
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if (rc == 2) |
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printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__); |
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kfree(id); |
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return 0; |
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} |
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int ide_config_drive_speed(ide_drive_t *drive, u8 speed) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
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struct ide_taskfile tf; |
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u16 *id = drive->id, i; |
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int error = 0; |
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u8 stat; |
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#ifdef CONFIG_BLK_DEV_IDEDMA |
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if (hwif->dma_ops) /* check if host supports DMA */ |
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hwif->dma_ops->dma_host_set(drive, 0); |
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#endif |
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/* Skip setting PIO flow-control modes on pre-EIDE drives */ |
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if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0) |
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goto skip; |
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/* |
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* Don't use ide_wait_cmd here - it will |
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* attempt to set_geometry and recalibrate, |
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* but for some reason these don't work at |
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* this point (lost interrupt). |
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*/ |
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udelay(1); |
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tp_ops->dev_select(drive); |
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SELECT_MASK(drive, 1); |
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udelay(1); |
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tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS); |
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memset(&tf, 0, sizeof(tf)); |
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tf.feature = SETFEATURES_XFER; |
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tf.nsect = speed; |
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tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT); |
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tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES); |
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if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK) |
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tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS); |
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error = __ide_wait_stat(drive, drive->ready_stat, |
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ATA_BUSY | ATA_DRQ | ATA_ERR, |
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WAIT_CMD, &stat); |
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SELECT_MASK(drive, 0); |
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if (error) { |
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(void) ide_dump_status(drive, "set_drive_speed_status", stat); |
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return error; |
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} |
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if (speed >= XFER_SW_DMA_0) { |
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id[ATA_ID_UDMA_MODES] &= ~0xFF00; |
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id[ATA_ID_MWDMA_MODES] &= ~0x0700; |
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id[ATA_ID_SWDMA_MODES] &= ~0x0700; |
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if (ata_id_is_cfa(id)) |
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id[ATA_ID_CFA_MODES] &= ~0x0E00; |
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} else if (ata_id_is_cfa(id)) |
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id[ATA_ID_CFA_MODES] &= ~0x01C0; |
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skip: |
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#ifdef CONFIG_BLK_DEV_IDEDMA |
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if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA)) |
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hwif->dma_ops->dma_host_set(drive, 1); |
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else if (hwif->dma_ops) /* check if host supports DMA */ |
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ide_dma_off_quietly(drive); |
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#endif |
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if (speed >= XFER_UDMA_0) { |
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i = 1 << (speed - XFER_UDMA_0); |
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id[ATA_ID_UDMA_MODES] |= (i << 8 | i); |
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} else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) { |
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i = speed - XFER_MW_DMA_2; |
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id[ATA_ID_CFA_MODES] |= i << 9; |
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} else if (speed >= XFER_MW_DMA_0) { |
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i = 1 << (speed - XFER_MW_DMA_0); |
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id[ATA_ID_MWDMA_MODES] |= (i << 8 | i); |
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} else if (speed >= XFER_SW_DMA_0) { |
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i = 1 << (speed - XFER_SW_DMA_0); |
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id[ATA_ID_SWDMA_MODES] |= (i << 8 | i); |
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} else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) { |
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i = speed - XFER_PIO_4; |
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id[ATA_ID_CFA_MODES] |= i << 6; |
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} |
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if (!drive->init_speed) |
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drive->init_speed = speed; |
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drive->current_speed = speed; |
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return error; |
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} |
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/* |
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* This should get invoked any time we exit the driver to |
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* wait for an interrupt response from a drive. handler() points |
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* at the appropriate code to handle the next interrupt, and a |
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* timer is started to prevent us from waiting forever in case |
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* something goes wrong (see the ide_timer_expiry() handler later on). |
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* |
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* See also ide_execute_command |
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*/ |
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void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
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unsigned int timeout) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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BUG_ON(hwif->handler); |
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hwif->handler = handler; |
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hwif->timer.expires = jiffies + timeout; |
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hwif->req_gen_timer = hwif->req_gen; |
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add_timer(&hwif->timer); |
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} |
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void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler, |
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unsigned int timeout) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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unsigned long flags; |
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spin_lock_irqsave(&hwif->lock, flags); |
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__ide_set_handler(drive, handler, timeout); |
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spin_unlock_irqrestore(&hwif->lock, flags); |
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} |
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EXPORT_SYMBOL(ide_set_handler); |
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/** |
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* ide_execute_command - execute an IDE command |
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* @drive: IDE drive to issue the command against |
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* @cmd: command |
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* @handler: handler for next phase |
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* @timeout: timeout for command |
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* |
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* Helper function to issue an IDE command. This handles the |
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* atomicity requirements, command timing and ensures that the |
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* handler and IRQ setup do not race. All IDE command kick off |
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* should go via this function or do equivalent locking. |
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*/ |
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void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd, |
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ide_handler_t *handler, unsigned timeout) |
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{ |
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ide_hwif_t *hwif = drive->hwif; |
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unsigned long flags; |
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spin_lock_irqsave(&hwif->lock, flags); |
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if ((cmd->protocol != ATAPI_PROT_DMA && |
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cmd->protocol != ATAPI_PROT_PIO) || |
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(drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT)) |
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__ide_set_handler(drive, handler, timeout); |
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hwif->tp_ops->exec_command(hwif, cmd->tf.command); |
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/* |
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* Drive takes 400nS to respond, we must avoid the IRQ being |
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* serviced before that. |
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* |
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* FIXME: we could skip this delay with care on non shared devices |
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*/ |
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ndelay(400); |
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spin_unlock_irqrestore(&hwif->lock, flags); |
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} |
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/* |
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* ide_wait_not_busy() waits for the currently selected device on the hwif |
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* to report a non-busy status, see comments in ide_probe_port(). |
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*/ |
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int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout) |
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{ |
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u8 stat = 0; |
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while (timeout--) { |
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/* |
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* Turn this into a schedule() sleep once I'm sure |
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* about locking issues (2.5 work ?). |
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*/ |
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mdelay(1); |
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stat = hwif->tp_ops->read_status(hwif); |
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if ((stat & ATA_BUSY) == 0) |
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return 0; |
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/* |
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* Assume a value of 0xff means nothing is connected to |
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* the interface and it doesn't implement the pull-down |
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* resistor on D7. |
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*/ |
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if (stat == 0xff) |
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return -ENODEV; |
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touch_nmi_watchdog(); |
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} |
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return -EBUSY; |
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}
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