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pata_pdc2027x: Updates 

Signed-off-by: Alan Cox <alan@redhat.com>

Correct missing modefilter (crash if BAR4 unassigned)
Use Cable Detect method
Wrap ->set_mode instead ready for ->post_set_mode removal
Maxtor errata as per Jeff Garzik report
Remove duplicated private udma_mask hacking
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2007-04-11 00:19:00 +01:00 committed by Jeff Garzik
parent ad648c0883
commit 9bedb799f2
1 changed files with 47 additions and 13 deletions
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60
drivers/ata/pata_pdc2027x.c
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@ -35,7 +35,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_pdc2027x"
#define DRV_VERSION "0.8"
#define DRV_VERSION "0.9"
#undef PDC_DEBUG
#ifdef PDC_DEBUG
@ -66,8 +66,10 @@ static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *e
static void pdc2027x_error_handler(struct ata_port *ap);
static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);
static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
static void pdc2027x_post_set_mode(struct ata_port *ap);
static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);
static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask);
static int pdc2027x_cable_detect(struct ata_port *ap);
static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed);
/*
* ATA Timing Tables based on 133MHz controller clock.
@ -146,6 +148,7 @@ static struct scsi_host_template pdc2027x_sht = {
static struct ata_port_operations pdc2027x_pata100_ops = {
.port_disable = ata_port_disable,
.mode_filter = ata_pci_default_filter,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
@ -166,6 +169,7 @@ static struct ata_port_operations pdc2027x_pata100_ops = {
.thaw = ata_bmdma_thaw,
.error_handler = pdc2027x_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = pdc2027x_cable_detect,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
@ -179,7 +183,8 @@ static struct ata_port_operations pdc2027x_pata133_ops = {
.port_disable = ata_port_disable,
.set_piomode = pdc2027x_set_piomode,
.set_dmamode = pdc2027x_set_dmamode,
.post_set_mode = pdc2027x_post_set_mode,
.set_mode = pdc2027x_set_mode,
.mode_filter = pdc2027x_mode_filter,
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
@ -200,6 +205,7 @@ static struct ata_port_operations pdc2027x_pata133_ops = {
.thaw = ata_bmdma_thaw,
.error_handler = pdc2027x_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = pdc2027x_cable_detect,
.irq_handler = ata_interrupt,
.irq_clear = ata_bmdma_irq_clear,
@ -261,7 +267,7 @@ static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *ade
}
/**
* pdc2027x_pata_cbl_detect - Probe host controller cable detect info
* pdc2027x_pata_cable_detect - Probe host controller cable detect info
* @ap: Port for which cable detect info is desired
*
* Read 80c cable indicator from Promise extended register.
@ -270,7 +276,7 @@ static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *ade
* LOCKING:
* None (inherited from caller).
*/
static void pdc2027x_cbl_detect(struct ata_port *ap)
static int pdc2027x_cable_detect(struct ata_port *ap)
{
u32 cgcr;
@ -281,13 +287,10 @@ static void pdc2027x_cbl_detect(struct ata_port *ap)
PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no);
ap->cbl = ATA_CBL_PATA80;
return;
return ATA_CBL_PATA80;
cbl40:
printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no);
ap->cbl = ATA_CBL_PATA40;
ap->udma_mask &= ATA_UDMA_MASK_40C;
return ATA_CBL_PATA40;
}
/**
@ -314,7 +317,6 @@ static int pdc2027x_prereset(struct ata_port *ap)
/* Check whether port enabled */
if (!pdc2027x_port_enabled(ap))
return -ENOENT;
pdc2027x_cbl_detect(ap);
return ata_std_prereset(ap);
}
@ -333,6 +335,32 @@ static void pdc2027x_error_handler(struct ata_port *ap)
ata_bmdma_drive_eh(ap, pdc2027x_prereset, ata_std_softreset, NULL, ata_std_postreset);
}
/**
* pdc2720x_mode_filter - mode selection filter
* @adev: ATA device
* @mask: list of modes proposed
*
* Block UDMA on devices that cause trouble with this controller.
*/
static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask)
{
unsigned char model_num[ATA_ID_PROD_LEN + 1];
struct ata_device *pair = ata_dev_pair(adev);
if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL)
return ata_pci_default_filter(adev, mask);
/* Check for slave of a Maxtor at UDMA6 */
ata_id_c_string(pair->id, model_num, ATA_ID_PROD,
ATA_ID_PROD_LEN + 1);
/* If the master is a maxtor in UDMA6 then the slave should not use UDMA 6 */
if(strstr(model_num, "Maxtor") == 0 && pair->dma_mode == XFER_UDMA_6)
mask &= ~ (1 << (6 + ATA_SHIFT_UDMA));
return ata_pci_default_filter(adev, mask);
}
/**
* pdc2027x_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port to configure
@ -444,17 +472,22 @@ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
}
/**
* pdc2027x_post_set_mode - Set the timing registers back to correct values.
* pdc2027x_set_mode - Set the timing registers back to correct values.
* @ap: Port to configure
* @r_failed: Returned device for failure
*
* The pdc2027x hardware will look at "SET FEATURES" and change the timing registers
* automatically. The values set by the hardware might be incorrect, under 133Mhz PLL.
* This function overwrites the possibly incorrect values set by the hardware to be correct.
*/
static void pdc2027x_post_set_mode(struct ata_port *ap)
static int pdc2027x_set_mode(struct ata_port *ap, struct ata_device **r_failed)
{
int i;
i = ata_do_set_mode(ap, r_failed);
if (i < 0)
return i;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
@ -476,6 +509,7 @@ static void pdc2027x_post_set_mode(struct ata_port *ap)
}
}
}
return 0;
}
/**