Bruce Griffith (Bruce.Griffith@se-eng.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3808
-gerrit
commit 495a071a10c1cfbdbcb00e60b48e6fc2a8c1ba22 Author: Bruce Griffith bruce.griffith@se-eng.com Date: Tue Jul 23 11:50:12 2013 -0600
AMD Hudson/Yangtze: Enable support for SATA port multipliers
Change-Id: Ie87873b093f3e2a6a5c83b96ccb6c898d3e25f72 Signed-off-by: Bruce Griffith bruce.griffith@se-eng.com Reviewed-by: Martin Roth martin.roth@se-eng.com --- src/southbridge/amd/agesa/hudson/sata.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/src/southbridge/amd/agesa/hudson/sata.c b/src/southbridge/amd/agesa/hudson/sata.c index cc8bf95..883deeb 100644 --- a/src/southbridge/amd/agesa/hudson/sata.c +++ b/src/southbridge/amd/agesa/hudson/sata.c @@ -29,7 +29,33 @@
static void sata_init(struct device *dev) { -} + /************************************** + * Configure the SATA port multiplier * + **************************************/ + #define BYTE_TO_DWORD_OFFSET(x) (x/4) + #define AHCI_BASE_ADDRESS_REG 0x24 + #define MISC_CONTROL_REG 0x40 + #define UNLOCK_BIT (1<<0) + #define SATA_CAPABILITIES_REG 0xFC + #define CFG_CAP_SPM (1<<12) + + volatile u32 *ahci_ptr = + (u32*)(pci_read_config32(dev, AHCI_BASE_ADDRESS_REG) & 0xFFFFFF00); + u32 temp; + + /* unlock the write-protect */ + temp = pci_read_config32(dev, MISC_CONTROL_REG); + temp |= UNLOCK_BIT; + pci_write_config32(dev, MISC_CONTROL_REG, temp); + + /* set the SATA AHCI mode to allow port expanders */ + *(ahci_ptr + BYTE_TO_DWORD_OFFSET(SATA_CAPABILITIES_REG)) |= CFG_CAP_SPM; + + /* lock the write-protect */ + temp = pci_read_config32(dev, MISC_CONTROL_REG); + temp &= ~UNLOCK_BIT; + pci_write_config32(dev, MISC_CONTROL_REG, temp); +};
static struct pci_operations lops_pci = { /* .set_subsystem = pci_dev_set_subsystem, */