Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2765
-gerrit
commit 0c1e45b2f24292beb4f77151dd1bf01ca81b25b0 Author: Shawn Nematbakhsh shawnn@google.com Date: Thu Mar 14 10:44:13 2013 -0700
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 --- src/southbridge/intel/bd82x6x/chip.h | 11 +++++++++++ src/southbridge/intel/bd82x6x/sata.c | 7 +++++++ 2 files changed, 18 insertions(+)
diff --git a/src/southbridge/intel/bd82x6x/chip.h b/src/southbridge/intel/bd82x6x/chip.h index 746e300..828466c 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 ddba521..594b09d 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);