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sb/intel/i82801gx: Use symbolic name for register, code rework 

An original code had a wrong register address 0x27 for AHCI BAR.
The value was aligned incidentally by the code specific of
the pci_read_config32 function to the correct address 0x24.

All 0x24 values in sata.c were changed to the symbolic name
PCI_BASE_ADDRESS_5 and the code was optimized.

An equivalent code was tested on a real hardware.

Signed-off-by: Petr Cvek <petrcvekcz@gmail.com>
Change-Id: I33509befe86ff6e333c559c87a0f45886d737df9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35737
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Petr Cvek 2019-10-01 04:01:21 +02:00 committed by Patrick Georgi
parent be81685887
commit c49869b424
1 changed files with 7 additions and 5 deletions
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12
src/southbridge/intel/i82801gx/sata.c
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@ -94,7 +94,6 @@ static void sata_init(struct device *dev)
{
u32 reg32;
u16 reg16;
u32 *ahci_bar;
u8 ports;
/* Get the chip configuration */
@ -117,7 +116,7 @@ static void sata_init(struct device *dev)
case SATA_MODE_IDE_LEGACY_COMBINED:
printk(BIOS_DEBUG, "SATA controller in combined mode.\n");
/* No AHCI: clear AHCI base */
pci_write_config32(dev, 0x24, 0x00000000);
pci_write_config32(dev, PCI_BASE_ADDRESS_5, 0x00000000);
/* And without AHCI BAR no memory decoding */
reg16 = pci_read_config16(dev, PCI_COMMAND);
reg16 &= ~PCI_COMMAND_MEMORY;
@ -155,8 +154,11 @@ static void sata_init(struct device *dev)
/* Interrupt Pin is set by D31IP.PIP */
pci_write_config8(dev, INTR_LN, 0x0a);
ahci_bar = (u32 *)(pci_read_config32(dev, 0x27) & ~0x3ff);
ahci_bar[3] = config->sata_ports_implemented;
struct resource *ahci_res = find_resource(dev, PCI_BASE_ADDRESS_5);
if (ahci_res != NULL)
/* write AHCI GHC_PI register */
write32(res2mmio(ahci_res, 0xc, 0),
config->sata_ports_implemented);
break;
default:
case SATA_MODE_IDE_PLAIN:
@ -165,7 +167,7 @@ static void sata_init(struct device *dev)
pci_write_config8(dev, SATA_MAP, 0x00);
/* No AHCI: clear AHCI base */
pci_write_config32(dev, 0x24, 0x00000000);
pci_write_config32(dev, PCI_BASE_ADDRESS_5, 0x00000000);
/* And without AHCI BAR no memory decoding */
reg16 = pci_read_config16(dev, PCI_COMMAND);