Hi Linux Alpha people,
For some time now, my Miata box (PWS 433au) has been complaining at boot-time:
--------------------------------------------------------------------------------
[ 6.999996] ata1.00: ATA-6: ST3200822A, 3.01, max UDMA/100
[ 6.999996] ata1.00: 390721968 sectors, multi 0: LBA48
[ 7.000972] ata1.01: ATAPI: DVDRW 16X16X5X, MTS1, max UDMA/66
[ 7.000972] ata1.00: failed to set xfermode (err_mask=0x2)
[ 7.119136] input: AT Raw Set 2 keyboard as
/devices/platform/i8042/serio0/input/input0
[ 7.136715] atkbd serio1: keyboard reset failed on isa0060/serio1
[ 12.358392] ata1.00: failed to set xfermode (err_mask=0x2)
[ 12.359368] ata1.00: limiting speed to MWDMA2:PIO3
[ 17.724600] ata1.00: configured for MWDMA2
[ 17.840811] ata1.01: both IDENTIFYs aborted, assuming NODEV
[ 17.840811] ata1.01: revalidation failed (errno=-2)
[ 28.034165] ata1.01: qc timeout (cmd 0xa1)
[ 28.034165] ata1.01: failed to IDENTIFY (I/O error, err_mask=0x4)
[ 28.041001] ata1.01: revalidation failed (errno=-5)
[ 33.061506] ata1: link is slow to respond, please be patient (ready=0)
[ 38.082011] ata1: device not ready (errno=-16), forcing hardreset
[ 38.489238] ata1.00: configured for MWDMA2
[ 38.605448] ata1.01: both IDENTIFYs aborted, assuming NODEV
[ 38.605448] ata1.01: revalidation failed (errno=-2)
[ 38.605448] ata1.01: disabled
[ 38.613261] ata1.00: configured for MWDMA2
[ 38.614238] scsi 1:0:0:0: Direct-Access ATA ST3200822A
3.01 PQ: 0 ANSI: 5
[ 38.616191] sd 1:0:0:0: [sdc] 390721968 512-byte logical blocks: (200
GB/186 GiB)
[ 38.617167] sd 1:0:0:0: [sdc] Write Protect is off
[ 38.617167] sd 1:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 38.617167] sd 1:0:0:0: [sdc] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 38.621073] sd 1:0:0:0: Attached scsi generic sg3 type 0
[ 38.635722] sdc: sdc1 sdc2
[ 38.639628] sd 1:0:0:0: [sdc] Attached SCSI disk
--------------------------------------------------------------------------------
It's clear from the timestamps that the kernel's busy resetting the IDE bus
for over half a minute, and when it's finished, it still fails to see my
DVD drive.
Fiddling about with drivers/ata/pata_cypress, I found this change fixes the
problem:
--- drivers/ata/pata_cypress.c.orig 2014-01-07 21:57:02.507778689 +0200
+++ drivers/ata/pata_cypress.c 2014-01-08 15:31:14.015467547 +0200
@@ -125,9 +125,9 @@
static int cy82c693_init_one(struct pci_dev *pdev, const struct
pci_device_id *id)
{
static const struct ata_port_info info = {
.flags = ATA_FLAG_SLAVE_POSS,
- .pio_mask = ATA_PIO4,
+ .pio_mask = ATA_PIO3,
.mwdma_mask = ATA_MWDMA2,
.port_ops = &cy82c693_port_ops
};
const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
The boot process is much smoother, and the DVD drive is detected (and works):
--------------------------------------------------------------------------------
[ 6.950191] ata1.00: ATA-6: ST3200822A, 3.01, max UDMA/100
[ 6.950191] ata1.00: 390721968 sectors, multi 0: LBA48
[ 6.951168] ata1.01: ATAPI: DVDRW 16X16X5X, MTS1, max UDMA/66
[ 6.958980] ata1.00: configured for MWDMA2
[ 6.983394] ata1.01: configured for MWDMA2
[ 6.985347] scsi 1:0:0:0: Direct-Access ATA ST3200822A
3.01 PQ: 0 ANSI: 5
[ 6.987301] sd 1:0:0:0: [sdc] 390721968 512-byte logical blocks: (200
GB/186 GiB)
[ 6.988277] sd 1:0:0:0: [sdc] Write Protect is off
[ 6.988277] sd 1:0:0:0: [sdc] Mode Sense: 00 3a 00 00
[ 6.988277] sd 1:0:0:0: [sdc] Write cache: enabled, read cache: enabled,
doesn't support DPO or FUA
[ 6.992183] sd 1:0:0:0: Attached scsi generic sg3 type 0
[ 7.009762] sdc: sdc1 sdc2
[ 7.016597] scsi 1:0:1:0: CD-ROM DVDRW 16X16X5X
MTS1 PQ: 0 ANSI: 5
[ 7.021480] sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2
cdda tray
[ 7.021480] cdrom: Uniform CD-ROM driver Revision: 3.20
[ 7.023433] sd 1:0:0:0: [sdc] Attached SCSI disk
[ 7.024410] sr 1:0:1:0: Attached scsi CD-ROM sr0
[ 7.025387] sr 1:0:1:0: Attached scsi generic sg4 type 5
--------------------------------------------------------------------------------
It's not clear to me why PIO4 doesn't work; indeed the CY82C693
datasheet claims it should work:
"The CY82C693 contains an integrated, dual-channel PCI to
IDE bridge. The IDE controller conforms to ANSI modes 0, 1,
2, 3, and 4 for PIO (Programmed I/O) transfers."
Anyway, hopefully this'll be of use to someone. I for one
am glad to be able to use (PATA) IDE devices on my Alpha;
SCSI disks are hard to find, and expensive when you do.
BTW: this patch was made against the Gentoo sources (3.10.7-gentoo-r1).
I've checked the current kernel sources (3.12.6), and the file's the
same. So the patch should apply as-is.
--
Andrew
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