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pata_hpt37x: add proper cable detection methods

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Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-11-19 19:10:44 +01:00 committed by Jeff Garzik
parent 1b677afda4
commit 9e87be9edd
1 changed files with 58 additions and 32 deletions
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90
drivers/ata/pata_hpt37x.c
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@ -303,24 +303,16 @@ static unsigned long hpt370a_filter(struct ata_device *adev, unsigned long mask)
}
/**
* hpt37x_pre_reset - reset the hpt37x bus
* @link: ATA link to reset
* @deadline: deadline jiffies for the operation
* hpt37x_cable_detect - Detect the cable type
* @ap: ATA port to detect on
*
* Perform the initial reset handling for the 370/372 and 374 func 0
* Return the cable type attached to this port
*/
static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
static int hpt37x_cable_detect(struct ata_port *ap)
{
u8 scr2, ata66;
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
static const struct pci_bits hpt37x_enable_bits[] = {
{ 0x50, 1, 0x04, 0x04 },
{ 0x54, 1, 0x04, 0x04 }
};
if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
return -ENOENT;
u8 scr2, ata66;
pci_read_config_byte(pdev, 0x5B, &scr2);
pci_write_config_byte(pdev, 0x5B, scr2 & ~0x01);
@ -330,9 +322,57 @@ static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
pci_write_config_byte(pdev, 0x5B, scr2);
if (ata66 & (2 >> ap->port_no))
ap->cbl = ATA_CBL_PATA40;
return ATA_CBL_PATA40;
else
ap->cbl = ATA_CBL_PATA80;
return ATA_CBL_PATA80;
}
/**
* hpt374_fn1_cable_detect - Detect the cable type
* @ap: ATA port to detect on
*
* Return the cable type attached to this port
*/
static int hpt374_fn1_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned int mcrbase = 0x50 + 4 * ap->port_no;
u16 mcr3;
u8 ata66;
/* Do the extra channel work */
pci_read_config_word(pdev, mcrbase + 2, &mcr3);
/* Set bit 15 of 0x52 to enable TCBLID as input */
pci_write_config_word(pdev, mcrbase + 2, mcr3 | 0x8000);
pci_read_config_byte(pdev, 0x5A, &ata66);
/* Reset TCBLID/FCBLID to output */
pci_write_config_word(pdev, mcrbase + 2, mcr3);
if (ata66 & (2 >> ap->port_no))
return ATA_CBL_PATA40;
else
return ATA_CBL_PATA80;
}
/**
* hpt37x_pre_reset - reset the hpt37x bus
* @link: ATA link to reset
* @deadline: deadline jiffies for the operation
*
* Perform the initial reset handling for the 370/372 and 374 func 0
*/
static int hpt37x_pre_reset(struct ata_link *link, unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
static const struct pci_bits hpt37x_enable_bits[] = {
{ 0x50, 1, 0x04, 0x04 },
{ 0x54, 1, 0x04, 0x04 }
};
if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
return -ENOENT;
/* Reset the state machine */
pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
@ -347,29 +387,12 @@ static int hpt374_fn1_pre_reset(struct ata_link *link, unsigned long deadline)
{ 0x50, 1, 0x04, 0x04 },
{ 0x54, 1, 0x04, 0x04 }
};
u16 mcr3;
u8 ata66;
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
unsigned int mcrbase = 0x50 + 4 * ap->port_no;
if (!pci_test_config_bits(pdev, &hpt37x_enable_bits[ap->port_no]))
return -ENOENT;
/* Do the extra channel work */
pci_read_config_word(pdev, mcrbase + 2, &mcr3);
/* Set bit 15 of 0x52 to enable TCBLID as input
*/
pci_write_config_word(pdev, mcrbase + 2, mcr3 | 0x8000);
pci_read_config_byte(pdev, 0x5A, &ata66);
/* Reset TCBLID/FCBLID to output */
pci_write_config_word(pdev, mcrbase + 2, mcr3);
if (ata66 & (2 >> ap->port_no))
ap->cbl = ATA_CBL_PATA40;
else
ap->cbl = ATA_CBL_PATA80;
/* Reset the state machine */
pci_write_config_byte(pdev, 0x50 + 4 * ap->port_no, 0x37);
udelay(100);
@ -584,6 +607,7 @@ static struct ata_port_operations hpt370_port_ops = {
.bmdma_stop = hpt370_bmdma_stop,
.mode_filter = hpt370_filter,
.cable_detect = hpt37x_cable_detect,
.set_piomode = hpt370_set_piomode,
.set_dmamode = hpt370_set_dmamode,
.prereset = hpt37x_pre_reset,
@ -608,6 +632,7 @@ static struct ata_port_operations hpt372_port_ops = {
.bmdma_stop = hpt37x_bmdma_stop,
.cable_detect = hpt37x_cable_detect,
.set_piomode = hpt372_set_piomode,
.set_dmamode = hpt372_set_dmamode,
.prereset = hpt37x_pre_reset,
@ -620,6 +645,7 @@ static struct ata_port_operations hpt372_port_ops = {
static struct ata_port_operations hpt374_fn1_port_ops = {
.inherits = &hpt372_port_ops,
.cable_detect = hpt374_fn1_cable_detect,
.prereset = hpt374_fn1_pre_reset,
};