diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/southbridge/amd/sb600/sb600_hda.c | 87 |
1 files changed, 54 insertions, 33 deletions
diff --git a/src/southbridge/amd/sb600/sb600_hda.c b/src/southbridge/amd/sb600/sb600_hda.c index e123187c68..7286eb25b7 100644 --- a/src/southbridge/amd/sb600/sb600_hda.c +++ b/src/southbridge/amd/sb600/sb600_hda.c @@ -35,23 +35,27 @@ static int set_bits(u8 * port, u32 mask, u32 val) u32 dword; int count; + /* Write (val & ~mask) to port */ val &= mask; dword = readl(port); dword &= ~mask; dword |= val; writel(dword, port); + /* Wait for readback of register to + * match what was just written to it + */ count = 50; do { + /* Wait 1ms based on BKDG wait time */ + mdelay(1); dword = readl(port); dword &= mask; - udelay(100); } while ((dword != val) && --count); + /* Timeout occured */ if (!count) return -1; - - udelay(540); return 0; } @@ -59,32 +63,31 @@ static u32 codec_detect(u8 * base) { u32 dword; - /* 1 */ - set_bits(base + 0x08, 1, 1); - - /* 2 */ - dword = readl(base + 0x0e); - dword |= 7; - writel(dword, base + 0x0e); + /* Set Bit0 to 0 to enter reset state (BAR + 0x8)[0] */ + if (set_bits(base + 0x08, 1, 0) == -1) + goto no_codec; - /* 3 */ - set_bits(base + 0x08, 1, 0); + /* Set Bit 0 to 1 to exit reset state (BAR + 0x8)[0] */ + if (set_bits(base + 0x08, 1, 1) == -1) + goto no_codec; - /* 4 */ - set_bits(base + 0x08, 1, 1); + /* Delay for 1 ms since the BKDG does */ + mdelay(1); - /* 5 */ + /* Read in Codec location (BAR + 0xe)[3..0]*/ dword = readl(base + 0xe); - dword &= 7; - - /* 6 */ - if (!dword) { - set_bits(base + 0x08, 1, 0); - printk_debug("No codec!\n"); - return 0; - } + dword &= 0x0F; + if (!dword) + goto no_codec; + return dword; +no_codec: + /* Codec Not found */ + /* Put HDA back in reset (BAR + 0x8) [0] */ + set_bits(base + 0x08, 1, 0); + printk_debug("No codec!\n"); + return 0; } static u32 cim_verb_data[] = { @@ -262,20 +265,38 @@ static void codecs_init(u8 * base, u32 codec_mask) static void hda_init(struct device *dev) { + u8 byte; + u32 dword; u8 *base; struct resource *res; u32 codec_mask; - - /* SM Setting */ - - /* Set routing pin */ - pci_write_config32(dev, 0xf8, 0x0); - pci_write_config8(dev, 0xfc, 0xAA); - /* Set INTA */ - pci_write_config8(dev, 0x63, 0x0); - /* Enable azalia, disable ac97 */ + device_t sm_dev; + + /* Enable azalia - PM_io 0x59[4], disable ac97 - PM_io 0x59[1..0] */ pm_iowrite(0x59, 0xB); - + + /* Find the SMBus */ + /* FIXME: Need to find out why the call below crashes. */ + /*sm_dev = dev_find_device(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_ATI_SB600_SM, 0);*/ + sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0)); + + /* Set routing pin - SMBus ExtFunc (0xf8/0xfc) */ + pci_write_config32(sm_dev, 0xf8, 0x00); + pci_write_config8(sm_dev, 0xfc, 0xAA); + /* Set INTA - SMBus 0x63 [2..0] */ + byte = pci_read_config8(sm_dev, 0x63); + byte &= ~0x7; + byte |= 0x0; /* INTA:0x0 - INTH:0x7 */ + pci_write_config8(sm_dev, 0x63, byte); + + /* Program the 2C to 0x437b1002 */ + dword = 0x437b1002; + pci_write_config32(dev, 0x2c, dword); + + /* Read in BAR */ + /* Is this right? HDA allows for a 64-bit BAR + * but this is only setup for a 32-bit one + */ res = find_resource(dev, 0x10); if (!res) return; |