New patch to review for coreboot: b2bbb0a AMD Hudson/Yangtze: Enable support for SATA port multipliers

[Bruce Griffith]

Bruce Griffith ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3808

-gerrit

commit b2bbb0af937dd6ea48b2aa187ece848963f0d462
Author: Bruce Griffith 
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 
    Reviewed-on: http://gerrit/925
    Reviewed-by: Martin Roth 
---
 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, */