diff options
Diffstat (limited to 'arch/x86/cpu/ivybridge/gma.c')
| -rw-r--r-- | arch/x86/cpu/ivybridge/gma.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/x86/cpu/ivybridge/gma.c b/arch/x86/cpu/ivybridge/gma.c index 85a09c64b6..1748f7fdce 100644 --- a/arch/x86/cpu/ivybridge/gma.c +++ b/arch/x86/cpu/ivybridge/gma.c @@ -8,6 +8,7 @@ #include <common.h> #include <bios_emul.h> +#include <dm.h> #include <errno.h> #include <fdtdec.h> #include <pci_rom.h> @@ -728,16 +729,88 @@ static int int15_handler(void) return res; } +void sandybridge_setup_graphics(struct udevice *dev, struct udevice *video_dev) +{ + u32 reg32; + u16 reg16; + u8 reg8; + + dm_pci_read_config16(video_dev, PCI_DEVICE_ID, ®16); + switch (reg16) { + case 0x0102: /* GT1 Desktop */ + case 0x0106: /* GT1 Mobile */ + case 0x010a: /* GT1 Server */ + case 0x0112: /* GT2 Desktop */ + case 0x0116: /* GT2 Mobile */ + case 0x0122: /* GT2 Desktop >=1.3GHz */ + case 0x0126: /* GT2 Mobile >=1.3GHz */ + case 0x0156: /* IvyBridge */ + case 0x0166: /* IvyBridge */ + break; + default: + debug("Graphics not supported by this CPU/chipset\n"); + return; + } + + debug("Initialising Graphics\n"); + + /* Setup IGD memory by setting GGC[7:3] = 1 for 32MB */ + dm_pci_read_config16(dev, GGC, ®16); + reg16 &= ~0x00f8; + reg16 |= 1 << 3; + /* Program GTT memory by setting GGC[9:8] = 2MB */ + reg16 &= ~0x0300; + reg16 |= 2 << 8; + /* Enable VGA decode */ + reg16 &= ~0x0002; + dm_pci_write_config16(dev, GGC, reg16); + + /* Enable 256MB aperture */ + dm_pci_read_config8(video_dev, MSAC, ®8); + reg8 &= ~0x06; + reg8 |= 0x02; + dm_pci_write_config8(video_dev, MSAC, reg8); + + /* Erratum workarounds */ + reg32 = readl(MCHBAR_REG(0x5f00)); + reg32 |= (1 << 9) | (1 << 10); + writel(reg32, MCHBAR_REG(0x5f00)); + + /* Enable SA Clock Gating */ + reg32 = readl(MCHBAR_REG(0x5f00)); + writel(reg32 | 1, MCHBAR_REG(0x5f00)); + + /* GPU RC6 workaround for sighting 366252 */ + reg32 = readl(MCHBAR_REG(0x5d14)); + reg32 |= (1 << 31); + writel(reg32, MCHBAR_REG(0x5d14)); + + /* VLW */ + reg32 = readl(MCHBAR_REG(0x6120)); + reg32 &= ~(1 << 0); + writel(reg32, MCHBAR_REG(0x6120)); + + reg32 = readl(MCHBAR_REG(0x5418)); + reg32 |= (1 << 4) | (1 << 5); + writel(reg32, MCHBAR_REG(0x5418)); +} + int gma_func0_init(struct udevice *dev, const void *blob, int node) { #ifdef CONFIG_VIDEO ulong start; #endif + struct udevice *nbridge; void *gtt_bar; ulong base; u32 reg32; int ret; + ret = uclass_first_device(UCLASS_NORTHBRIDGE, &nbridge); + if (!nbridge) + return -ENODEV; + sandybridge_setup_graphics(nbridge, dev); + /* IGD needs to be Bus Master */ dm_pci_read_config32(dev, PCI_COMMAND, ®32); reg32 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO; |