diff options
author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-10 00:01:10 +0200 |
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committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-05-10 00:01:10 +0200 |
commit | 7f8f48af0861c38c28d4abd550102643e0ea9e6a (patch) | |
tree | 6ec47ace87afbd96cc1144d423854b09d9f21d75 /drivers/ide/ide-iops.c | |
parent | 7662d046df09e80680b77b68de896beab45e675e (diff) |
ide: cable detection fixes (take 2)
Tejun's recent eighty_ninty_three() fix has inspired me to do more thorough
review of the cable detection code...
* print user-friendly warning about limiting the maximum transfer speed
to UDMA33 (and the reason behind it) when 80-wire cable is not detected,
also while at it cleanup eighty_ninty_three() a bit
* use eighty_ninty_three() in ide_ata66_check(), this actually fixes 3 bugs:
- bit 14 (word 93 validity check) == 1 && bit 13 (80-wire cable test) == 1
were used as 80-wire cable present test for CONFIG_IDEDMA_IVB=n case
(please see FIXME comment in eighty_ninty_three() for more details)
- CONFIG_IDEDMA_IVB=y/n cases were interchanged
- check for SATA devices was missing
* remove private cable warnings from pdc_202xx{old,new} drivers now that core
code provides this functionality (plus, in pdc202xx_new case the test could
give false warnings for ATAPI devices because pdc202xx_new driver doesn't
even support ATAPI DMA)
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide-iops.c')
-rw-r--r-- | drivers/ide/ide-iops.c | 53 |
1 files changed, 29 insertions, 24 deletions
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c index ed6128f6cd9..f0be5f665a0 100644 --- a/drivers/ide/ide-iops.c +++ b/drivers/ide/ide-iops.c @@ -571,25 +571,40 @@ EXPORT_SYMBOL(ide_wait_stat); */ u8 eighty_ninty_three (ide_drive_t *drive) { - if(HWIF(drive)->udma_four == 0) - return 0; + ide_hwif_t *hwif = drive->hwif; + struct hd_driveid *id = drive->id; + + if (hwif->udma_four == 0) + goto no_80w; /* Check for SATA but only if we are ATA5 or higher */ - if (drive->id->hw_config == 0 && (drive->id->major_rev_num & 0x7FE0)) + if (id->hw_config == 0 && (id->major_rev_num & 0x7FE0)) return 1; - if (!(drive->id->hw_config & 0x6000)) - return 0; -#ifndef CONFIG_IDEDMA_IVB - if(!(drive->id->hw_config & 0x4000)) - return 0; -#endif /* CONFIG_IDEDMA_IVB */ + /* * FIXME: * - change master/slave IDENTIFY order * - force bit13 (80c cable present) check * (unless the slave device is pre-ATA3) */ - return 1; +#ifndef CONFIG_IDEDMA_IVB + if (id->hw_config & 0x4000) +#else + if (id->hw_config & 0x6000) +#endif + return 1; + +no_80w: + if (drive->udma33_warned == 1) + return 0; + + printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, " + "limiting max speed to UDMA33\n", + drive->name, hwif->udma_four ? "drive" : "host"); + + drive->udma33_warned = 1; + + return 0; } int ide_ata66_check (ide_drive_t *drive, ide_task_t *args) @@ -597,23 +612,13 @@ int ide_ata66_check (ide_drive_t *drive, ide_task_t *args) if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_SETFEATURES) && (args->tfRegister[IDE_SECTOR_OFFSET] > XFER_UDMA_2) && (args->tfRegister[IDE_FEATURE_OFFSET] == SETFEATURES_XFER)) { -#ifndef CONFIG_IDEDMA_IVB - if ((drive->id->hw_config & 0x6000) == 0) { -#else /* !CONFIG_IDEDMA_IVB */ - if (((drive->id->hw_config & 0x2000) == 0) || - ((drive->id->hw_config & 0x4000) == 0)) { -#endif /* CONFIG_IDEDMA_IVB */ - printk("%s: Speed warnings UDMA 3/4/5 is not " - "functional.\n", drive->name); - return 1; - } - if (!HWIF(drive)->udma_four) { - printk("%s: Speed warnings UDMA 3/4/5 is not " - "functional.\n", - HWIF(drive)->name); + if (eighty_ninty_three(drive) == 0) { + printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot " + "be set\n", drive->name); return 1; } } + return 0; } |