diff options
Diffstat (limited to 'src/mainboard/amd/tilapia_fam10/mainboard.c')
| -rw-r--r-- | src/mainboard/amd/tilapia_fam10/mainboard.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/mainboard/amd/tilapia_fam10/mainboard.c b/src/mainboard/amd/tilapia_fam10/mainboard.c index b2b0525503..7bb2b3a1dd 100644 --- a/src/mainboard/amd/tilapia_fam10/mainboard.c +++ b/src/mainboard/amd/tilapia_fam10/mainboard.c @@ -48,6 +48,7 @@ uint64_t uma_memory_base, uma_memory_size; void set_pcie_dereset(void); void set_pcie_reset(void); +u8 is_dev3_present(void); void set_pcie_dereset() { @@ -130,6 +131,90 @@ static void get_ide_dma66(void) #endif /* + * justify the dev3 is exist or not + */ +u8 is_dev3_present(void) +{ + u16 word; + device_t sm_dev; + + /* access the smbus extended register */ + sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0)); + + /* put the GPIO68 output to tristate */ + word = pci_read_config16(sm_dev, 0x7e); + word |= 1 << 6; + pci_write_config16(sm_dev, 0x7e,word); + + /* read the GPIO68 input status */ + word = pci_read_config16(sm_dev, 0x7e); + + if(word & (1 << 10)){ + /*not exist*/ + return 0; + }else{ + /*exist*/ + return 1; + } +} + + +/* + * set gpio40 gfx + */ +static void set_gpio40_gfx(void) +{ + u8 byte; + u32 dword; + device_t sm_dev; + /* disable the GPIO40 as CLKREQ2# function */ + byte = pm_ioread(0xd3); + byte &= ~(1 << 7); + pm_iowrite(0xd3, byte); + + /* disable the GPIO40 as CLKREQ3# function */ + byte = pm_ioread(0xd4); + byte &= ~(1 << 0); + pm_iowrite(0xd4, byte); + + /* enable pull up for GPIO68 */ + byte = pm2_ioread(0xf1); + byte &= ~(1 << 4); + pm2_iowrite(0xf1, byte); + + /* access the smbus extended register */ + sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0)); + + /*if the dev3 is present, set the gfx to 2x8 lanes*/ + /*otherwise set the gfx to 1x16 lanes*/ + if(is_dev3_present()){ + + printk(BIOS_INFO, "Dev3 is present. GFX Configuration is Two x8 slots\n"); + /* when the gpio40 is configured as GPIO, this will enable the output */ + pci_write_config32(sm_dev, 0xf8, 0x4); + dword = pci_read_config32(sm_dev, 0xfc); + dword &= ~(1 << 10); + + /* When the gpio40 is configured as GPIO, this will represent the output value*/ + /* 1 :enable two x8 , 0 : master slot enable only */ + dword |= (1 << 26); + pci_write_config32(sm_dev, 0xfc, dword); + + }else{ + printk(BIOS_INFO, "Dev3 is not present. GFX Configuration is One x16 slot\n"); + /* when the gpio40 is configured as GPIO, this will enable the output */ + pci_write_config32(sm_dev, 0xf8, 0x4); + dword = pci_read_config32(sm_dev, 0xfc); + dword &= ~(1 << 10); + + /* When the gpio40 is configured as GPIO, this will represent the output value*/ + /* 1 :enable two x8 , 0 : master slot enable only */ + dword &= ~(1 << 26); + pci_write_config32(sm_dev, 0xfc, dword); + } +} + +/* * set thermal config */ static void set_thermal_config(void) @@ -247,6 +332,7 @@ static void tilapia_enable(device_t dev) set_pcie_dereset(); /* get_ide_dma66(); */ set_thermal_config(); + set_gpio40_gfx(); } int add_mainboard_resources(struct lb_memory *mem) |