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Adds a retry/faildown to SB600 SATA detection logic. 

SATA port status kept returning 0x1: BAR5+po+28h
1h = Device presence detected but Phy communication not established

This patch adds logic to force 1.5g if the drive fails to communicate at 3.0g.

Signed-off-by: Dan Lykowski <lykowdk@gmail.com>
Acked-by: Peter Stuge <peter@stuge.se>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3864 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Dan Lykowski 2009-01-15 02:35:30 +00:00 committed by Peter Stuge
parent 0f502c7537
commit 6912846dda
1 changed files with 29 additions and 0 deletions
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29
src/southbridge/amd/sb600/sb600_sata.c
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@ -175,6 +175,35 @@ static void sata_init(struct device *dev)
byte = readb(sata_bar5 + 0x128 + 0x80 * i);
printk_spew("SATA port %i status = %x\n", i, byte);
byte &= 0xF;
if( byte == 0x1 ) {
/* If the drive status is 0x1 then we see it but we aren't talking to it. */
/* Try to do something about it. */
printk_spew("SATA device detected but not talking. Trying lower speed.\n");
/* Read in Port-N Serial ATA Control Register */
byte = readb(sata_bar5 + 0x12C + 0x80 * i);
/* Set Reset Bit and 1.5g bit */
byte |= 0x11;
writeb(byte, (sata_bar5 + 0x12C + 0x80 * i));
/* Wait 1ms */
mdelay(1);
/* Clear Reset Bit */
byte &= ~0x01;
writeb(byte, (sata_bar5 + 0x12C + 0x80 * i));
/* Wait 1ms */
mdelay(1);
/* Reread status */
byte = readb(sata_bar5 + 0x128 + 0x80 * i);
printk_spew("SATA port %i status = %x\n", i, byte);
byte &= 0xF;
}
if (byte == 0x3) {
for (j = 0; j < 10; j++) {
if (!sata_drive_detect(i, ((i / 2) == 0) ? sata_bar0 : sata_bar2))