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pata_ali: force initialise a few bits 

We can't assume some of the setup here on non x86 boxes.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Alan Cox 2009-01-05 14:13:22 +00:00 committed by Jeff Garzik
parent 978ff6db23
commit 1b2c357c30
1 changed files with 39 additions and 34 deletions
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73
drivers/ata/pata_ali.c
View File

@ -19,7 +19,9 @@
*
* TODO/CHECK
* Cannot have ATAPI on both master & slave for rev < c2 (???) but
* otherwise should do atapi DMA.
* otherwise should do atapi DMA (For now for old we do PIO only for
* ATAPI)
* Review Sunblade workaround.
*/
#include <linux/kernel.h>
@ -33,12 +35,14 @@
#include <linux/dmi.h>
#define DRV_NAME "pata_ali"
#define DRV_VERSION "0.7.5"
#define DRV_VERSION "0.7.7"
static int ali_atapi_dma = 0;
module_param_named(atapi_dma, ali_atapi_dma, int, 0644);
MODULE_PARM_DESC(atapi_dma, "Enable ATAPI DMA (0=disable, 1=enable)");
static struct pci_dev *isa_bridge;
/*
* Cable special cases
*/
@ -401,27 +405,40 @@ static struct ata_port_operations ali_c5_port_ops = {
static void ali_init_chipset(struct pci_dev *pdev)
{
u8 tmp;
struct pci_dev *north, *isa_bridge;
struct pci_dev *north;
/*
* The chipset revision selects the driver operations and
* mode data.
*/
if (pdev->revision >= 0x20 && pdev->revision < 0xC2) {
/* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
if (pdev->revision <= 0x20) {
pci_read_config_byte(pdev, 0x53, &tmp);
tmp |= 0x03;
pci_write_config_byte(pdev, 0x53, tmp);
} else {
pci_read_config_byte(pdev, 0x4a, &tmp);
pci_write_config_byte(pdev, 0x4a, tmp | 0x20);
pci_read_config_byte(pdev, 0x4B, &tmp);
/* Clear CD-ROM DMA write bit */
tmp &= 0x7F;
pci_write_config_byte(pdev, 0x4B, tmp);
} else if (pdev->revision >= 0xC2) {
/* Enable cable detection logic */
pci_read_config_byte(pdev, 0x4B, &tmp);
pci_write_config_byte(pdev, 0x4B, tmp | 0x08);
if (pdev->revision < 0xC2)
/* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */
/* Clear CD-ROM DMA write bit */
tmp &= 0x7F;
/* Cable and UDMA */
pci_write_config_byte(pdev, 0x4B, tmp | 0x09);
/*
* CD_ROM DMA on (0x53 bit 0). Enable this even if we want
* to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
* via 0x54/55.
*/
pci_read_config_byte(pdev, 0x53, &tmp);
if (pdev->revision >= 0xc7)
tmp |= 0x03;
else
tmp |= 0x01; /* CD_ROM enable for DMA */
pci_write_config_byte(pdev, 0x53, tmp);
}
north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0));
isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) {
/* Configure the ALi bridge logic. For non ALi rely on BIOS.
Set the south bridge enable bit */
@ -431,22 +448,6 @@ static void ali_init_chipset(struct pci_dev *pdev)
else if (pdev->revision > 0xC2 && pdev->revision < 0xC5)
pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02);
}
if (pdev->revision >= 0x20) {
/*
* CD_ROM DMA on (0x53 bit 0). Enable this even if we want
* to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control
* via 0x54/55.
*/
pci_read_config_byte(pdev, 0x53, &tmp);
if (pdev->revision <= 0x20)
tmp &= ~0x02;
if (pdev->revision >= 0xc7)
tmp |= 0x03;
else
tmp |= 0x01; /* CD_ROM enable for DMA */
pci_write_config_byte(pdev, 0x53, tmp);
}
pci_dev_put(isa_bridge);
pci_dev_put(north);
ata_pci_bmdma_clear_simplex(pdev);
}
@ -516,7 +517,6 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
const struct ata_port_info *ppi[] = { NULL, NULL };
u8 tmp;
struct pci_dev *isa_bridge;
int rc;
rc = pcim_enable_device(pdev);
@ -543,14 +543,12 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
ali_init_chipset(pdev);
isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
if (isa_bridge && pdev->revision >= 0x20 && pdev->revision < 0xC2) {
/* Are we paired with a UDMA capable chip */
pci_read_config_byte(isa_bridge, 0x5E, &tmp);
if ((tmp & 0x1E) == 0x12)
ppi[0] = &info_20_udma;
}
pci_dev_put(isa_bridge);
return ata_pci_sff_init_one(pdev, ppi, &ali_sht, NULL);
}
@ -590,13 +588,20 @@ static struct pci_driver ali_pci_driver = {
static int __init ali_init(void)
{
return pci_register_driver(&ali_pci_driver);
int ret;
isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
ret = pci_register_driver(&ali_pci_driver);
if (ret < 0)
pci_dev_put(isa_bridge);
return ret;
}
static void __exit ali_exit(void)
{
pci_unregister_driver(&ali_pci_driver);
pci_dev_put(isa_bridge);
}