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broadwell: Fixes for _SWS support 

- These should be 64bit values so when they try to return -1
it is interpreted properly by the kernel.
- The GPE value needs to be reset at the start so it does not
return stale data from a previous resume.
- If a GPE register is zero the value should only be updated
if it has not yet found a set bit.

BUG=chrome-os-partner:34532
BRANCH=samus,auron
TEST=build and boot on samus, suspend/resume with various
wake sources and ensure the reported _SWS values are correct
in every case.

Original-Change-Id: Ic6897f20ad2f321f3566694c032b75a3db120556
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/235012
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit be3c79b87b81563f744eb885708a52730debaccb)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I801c6e4f90dde0f5f69685f987a9831ee5e99e4a
Reviewed-on: http://review.coreboot.org/9699
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Duncan Laurie 2014-12-12 10:52:34 -08:00 committed by Marc Jones
parent cb12f65931
commit ab1e96a099
3 changed files with 23 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/soc/intel/broadwell/acpi/globalnvs.asl
View File

@ -53,16 +53,15 @@ Field (GNVS, ByteAcc, NoLock, Preserve)
TCRT, 8, // 0x10 - Critical Threshold
TPSV, 8, // 0x11 - Passive Threshold
TMAX, 8, // 0x12 - CPU Tj_max
, 8, // 0x13 - Unused
S5U0, 8, // 0x14 - Enable USB in S5
S3U0, 8, // 0x15 - Enable USB in S3
S33G, 8, // 0x16 - Enable 3G in S3
LIDS, 8, // 0x17 - LID State
PWRS, 8, // 0x18 - AC Power State
CMEM, 32, // 0x19 - 0x1c - CBMEM TOC
CBMC, 32, // 0x1d - 0x20 - Coreboot Memory Console
PM1I, 32, // 0x21 - 0x24 - PM1 wake status bit
GPEI, 32, // 0x25 - 0x28 - GPE wake status bit
S5U0, 8, // 0x13 - Enable USB in S5
S3U0, 8, // 0x14 - Enable USB in S3
S33G, 8, // 0x15 - Enable 3G in S3
LIDS, 8, // 0x16 - LID State
PWRS, 8, // 0x17 - AC Power State
CMEM, 32, // 0x18 - 0x1b - CBMEM TOC
CBMC, 32, // 0x1c - 0x1f - Coreboot Memory Console
PM1I, 64, // 0x20 - 0x27 - PM1 wake status bit
GPEI, 64, // 0x28 - 0x2f - GPE wake status bit
/* ChromeOS specific */
Offset (0x100),

21
src/soc/intel/broadwell/include/soc/nvs.h
View File

@ -44,17 +44,16 @@ typedef struct {
u8 tcrt; /* 0x10 - Critical Threshold */
u8 tpsv; /* 0x11 - Passive Threshold */
u8 tmax; /* 0x12 - CPU Tj_max */
u8 unused1; /* 0x13 - Unused */
u8 s5u0; /* 0x14 - Enable USB in S5 */
u8 s3u0; /* 0x15 - Enable USB in S3 */
u8 s33g; /* 0x16 - Enable 3G in S3 */
u8 lids; /* 0x17 - LID State */
u8 pwrs; /* 0x18 - AC Power State */
u32 obsolete_cmem; /* 0x19 - 0x1c - CBMEM TOC */
u32 cbmc; /* 0x1d - 0x20 - Coreboot Memory Console */
u32 pm1i; /* 0x21 - 0x24 - PM1 wake status bit */
u32 gpei; /* 0x25 - 0x28 - GPE wake status bit */
u8 unused[215];
u8 s5u0; /* 0x13 - Enable USB in S5 */
u8 s3u0; /* 0x14 - Enable USB in S3 */
u8 s33g; /* 0x15 - Enable 3G in S3 */
u8 lids; /* 0x16 - LID State */
u8 pwrs; /* 0x17 - AC Power State */
u32 cmem; /* 0x18 - 0x1b - CBMEM TOC */
u32 cbmc; /* 0x1c - 0x1f - Coreboot Memory Console */
u64 pm1i; /* 0x20 - 0x27 - PM1 wake status bit */
u64 gpei; /* 0x28 - 0x2f - GPE wake status bit */
u8 unused[208];
/* ChromeOS specific (0x100 - 0xfff) */
chromeos_acpi_t chromeos;

4
src/soc/intel/broadwell/ramstage.c
View File

@ -52,12 +52,14 @@ static void save_acpi_wake_source(global_nvs_t *gnvs)
gnvs->pm1i = -1;
/* Scan for first set bit in GPE registers */
gnvs->gpei = -1;
for (gpe_reg = 0; gpe_reg < GPE0_REG_MAX; gpe_reg++) {
u32 gpe = ps->gpe0_sts[gpe_reg] & ps->gpe0_en[gpe_reg];
int start = gpe_reg * GPE0_REG_SIZE;
int end = start + GPE0_REG_SIZE;
if (gpe == 0) {
if (!gnvs->gpei)
gnvs->gpei = end;
continue;
}
@ -73,7 +75,7 @@ static void save_acpi_wake_source(global_nvs_t *gnvs)
if (gnvs->gpei >= (GPE0_REG_MAX * GPE0_REG_SIZE))
gnvs->gpei = -1;
printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %d GPE Index %d\n",
printk(BIOS_DEBUG, "ACPI _SWS is PM1 Index %lld GPE Index %lld\n",
gnvs->pm1i, gnvs->gpei);
}