libata - success with 82801AA IDE

libata - success with 82801AA IDE

[Pavel Roskin]

Hello!

I just want to report that Intel 82801AA IDE controller (8086:2411) is
working with libata from 2.6.0-test9-bk3.  I applied following patch:

------------------------
--- linux.orig/drivers/scsi/ata_piix.c
+++ linux/drivers/scsi/ata_piix.c
@@ -29,6 +29,7 @@

 #define DRV_NAME	"ata_piix"
 #define DRV_VERSION	"0.95"
+#define ATA_ENABLE_PATA 1

 enum {
 	PIIX_IOCFG		= 0x54, /* IDE I/O configuration register */
@@ -63,6 +64,7 @@ static unsigned int in_module_init = 1;
 static struct pci_device_id piix_pci_tbl[] = {
 #ifdef ATA_ENABLE_PATA
 	{ 0x8086, 0x7111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix4_pata },
+	{ 0x8086, 0x2411, PCI_ANY_ID, PCI_ANY_ID, 0, 0, piix4_pata },
 	{ 0x8086, 0x24db, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata },
 	{ 0x8086, 0x25a2, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_pata },
 #endif
------------------------

Relevant portion of the kernel log:

------------------------
libata version 0.75 loaded.
ata_piix version 0.95
PCI: Setting latency timer of device 0000:00:1f.1 to 64
ata1: PATA max UDMA/33 cmd 0x1F0 ctl 0x3F6 bmdma 0xF000 irq 14
ata1: dev 0 cfg 49:2f00 82:346b 83:4301 84:4000 85:3468 86:0001 87:4000
88:103f
ata1: dev 0 ATA, max UDMA/100, 39102336 sectors
ata1: dev 0 configured for UDMA/33
scsi0 : ata_piix
  Vendor: ATA       Model: WDC WD200BB-00AU  Rev: 0.75
  Type:   Direct-Access                      ANSI SCSI revision: 05
ata2: PATA max UDMA/33 cmd 0x170 ctl 0x376 bmdma 0xF008 irq 15
ata2: dev 0 cfg 49:0f00 82:0000 83:0000 84:0000 85:0000 86:0000 87:0000
88:0000
ata2: no udma
ata2: dev 0 not supported, ignoring
ata2: thread exiting
scsi1 : ata_piix
SCSI device sda: 39102336 512-byte hdwr sectors (20020 MB)
SCSI device sda: drive cache: write through
 /dev/scsi/host0/bus0/target0/lun0: p1 p2 p3
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
------------------------

I have a CD-ROM as master on the the secondary channel (normally seen as
/dev/hdc), but it doesn't support DMA, so it wasn't detected.

I don't know if there is any interest in developing the "parallel IDE"
support.  I see that the option to enable it is not present in Linux
configuration.  Anyway, that's a device that can be added to the
device table if PATA support is here to stay.

-- 
Regards,
Pavel Roskin

Re: libata - success with 82801AA IDE

[Jeff Garzik]

Pavel Roskin wrote:
> Hello!
> 
> I just want to report that Intel 82801AA IDE controller (8086:2411) is
> working with libata from 2.6.0-test9-bk3.  I applied following patch:

Cool.



> I have a CD-ROM as master on the the secondary channel (normally seen as
> /dev/hdc), but it doesn't support DMA, so it wasn't detected.

Well, even so, ATAPI support is very incomplete at the moment.  That's a 
bigger reason why PATA support isn't receiving more love, at the moment.


> I don't know if there is any interest in developing the "parallel IDE"
> support.  I see that the option to enable it is not present in Linux
> configuration.  Anyway, that's a device that can be added to the
> device table if PATA support is here to stay.

I find it quite useful locally, and will be finishing up cable detection 
(currently PATA is limited to UDMA/33) soon.  However, with my 
apologies, I won't be applying your patch -- for the moment.  Before any 
more PATA PCI ids are added, I'll need to go through the docs and 
drivers/ide/pci/piix.c, to determine precisely PATA chipset speed 
limits:  UDMA/133 for some, UDMA/100, etc.  Your patch is a bit 
incorrect in that it does not truly reflect the maximum speed of the 
82801AA chipset.

In any case, the executive decision has been made "drivers/ide for PATA, 
libata for SATA", so that's the overall direction.

Thanks,

	Jeff