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authorShawn Nematbakhsh <shawnn@google.com>2013-03-14 10:44:13 -0700
committerRonald G. Minnich <rminnich@gmail.com>2013-03-17 22:51:48 +0100
commitc9fc0297ad6a63d9edf981a46f29f9372d11634c (patch)
treed92c1cfb738f7cd7dfc61583886ce607023855be /src/southbridge/intel
parent645b376ec82c5343bd197f04fa9e7bb53ee23d69 (diff)
bd82x6x: Add config option to force SATA link to different speeds.
Certain SATA devices claim to support SATA 6 Gbps, but in fact have bugs. For these devices, add a config option to force the SATA link speed to something other than default. Change-Id: I2dc1793cd58771298a392345162d39d20eb0afbb Signed-off-by: Shawn Nematbakhsh <shawnn@google.com> Reviewed-on: http://review.coreboot.org/2765 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/southbridge/intel')
-rw-r--r--src/southbridge/intel/bd82x6x/chip.h11
-rw-r--r--src/southbridge/intel/bd82x6x/sata.c7
2 files changed, 18 insertions, 0 deletions
diff --git a/src/southbridge/intel/bd82x6x/chip.h b/src/southbridge/intel/bd82x6x/chip.h
index 746e3004ec..828466c0c4 100644
--- a/src/southbridge/intel/bd82x6x/chip.h
+++ b/src/southbridge/intel/bd82x6x/chip.h
@@ -70,6 +70,17 @@ struct southbridge_intel_bd82x6x_config {
uint32_t sata_port0_gen3_tx;
uint32_t sata_port1_gen3_tx;
+ /**
+ * SATA Interface Speed Support Configuration
+ *
+ * Only the lower two bits have a meaning:
+ * 00 - No effect (leave as chip default)
+ * 01 - 1.5 Gb/s maximum speed
+ * 10 - 3.0 Gb/s maximum speed
+ * 11 - 6.0 Gb/s maximum speed
+ */
+ uint8_t sata_interface_speed_support;
+
uint32_t gen1_dec;
uint32_t gen2_dec;
uint32_t gen3_dec;
diff --git a/src/southbridge/intel/bd82x6x/sata.c b/src/southbridge/intel/bd82x6x/sata.c
index ddba521e4f..594b09d057 100644
--- a/src/southbridge/intel/bd82x6x/sata.c
+++ b/src/southbridge/intel/bd82x6x/sata.c
@@ -135,6 +135,13 @@ static void sata_init(struct device *dev)
reg32 = read32(abar + 0x00);
reg32 |= 0x0c006000; // set PSC+SSC+SALP+SSS
reg32 &= ~0x00020060; // clear SXS+EMS+PMS
+ /* Set ISS, if available */
+ if (config->sata_interface_speed_support)
+ {
+ reg32 &= ~0x00f00000;
+ reg32 |= (config->sata_interface_speed_support & 0x03)
+ << 20;
+ }
write32(abar + 0x00, reg32);
/* PI (Ports implemented) */
write32(abar + 0x0c, config->sata_port_map);