diff options
| -rw-r--r-- | config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch b/config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch new file mode 100644 index 00000000..f4c3939c --- /dev/null +++ b/config/coreboot/default/patches/0039-fix-sata-ports-on-dell-9020-sff-and-mt.patch @@ -0,0 +1,66 @@ +From 4889f08306f1530211dcc6f6a4e999c6cc72f3ac Mon Sep 17 00:00:00 2001 +From: Leah Rowe <info@minifree.org> +Date: Sat, 30 Mar 2024 05:57:54 +0000 +Subject: [PATCH 1/1] fix sata ports on dell 9020 sff and mt + +mate kukri has a patch under review on coreboot that sets +sata port map to 0x7 on sff and 0xf on mt. + +see: intel 8 series pch datasheet, section 13.1.35 + +basically, the 6 least significant bits enable the sata +slots; 1 for enable and 0 for disable. there can be up +to 6 ports. least significant bit is port 0, then next +is port 1, and so on. + +coreboot currently enables ports 0, 1, 4 and 5, making this +value 0x33 (converted to binary: 00110011). sff has ports +0, 1 and 2 wired, so mate changed that to 0x7 (00000111). + +on mt, the blue ports are ports 0 and 1, but the two white +ports don't work, but coreboot enables 4 and 5; it is +likely that the blue ports are in fact 0 and 1, and the +white ports are 2 and 3, but we've not tested this! + +it could be that the blue ports are ports 4 and 5, and +the white ports are 2 and 3! we have not yet determined +this, but mate set it to 0xf, meaning ports 0 1 2 and 3 +are enabled, in his patch under review. the chance that +it's 2, 3, 4 and 5 on the board is unlikely, but it is +theoretically possible and has not been confirmed. + +therefore, for now, i will set the value to 0x3f, which +in binary is 00111111, thus enabling all 6 slots. the two +that aren't physically wired don't really matter. enabling +ports (from the pch) that electrically aren't there and +then powering on is electrically equivalent to those ports +being actually being wired, but with no devices plugged +into them. therefore, 0x3f is an effective shotgun fix. + +i'll remove this patch and use mate's fix when the latter +has been tested on MT; it has already been tested on SFF. + +this patch fixes the 3rd sata slot on 9020 sff, and the 3rd +and 4th sata slots on 9020 MT + +Signed-off-by: Leah Rowe <info@minifree.org> +--- + src/mainboard/dell/optiplex_9020/devicetree.cb | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/src/mainboard/dell/optiplex_9020/devicetree.cb b/src/mainboard/dell/optiplex_9020/devicetree.cb +index c0b17a15ff..7bfa6736a6 100644 +--- a/src/mainboard/dell/optiplex_9020/devicetree.cb ++++ b/src/mainboard/dell/optiplex_9020/devicetree.cb +@@ -23,7 +23,7 @@ chip northbridge/intel/haswell + register "gen2_dec" = "0x007c0901" + register "gen3_dec" = "0x003c07e1" + register "gen4_dec" = "0x001c0901" +- register "sata_port_map" = "0x33" ++ register "sata_port_map" = "0x3f" + + device pci 14.0 on end # xHCI controller + device pci 16.0 on end # Management Engine interface 1 +-- +2.39.2 + |