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authorRizwan Qureshi <rizwan.qureshi@intel.com>2019-02-17 11:31:21 +0530
committerPatrick Georgi <pgeorgi@google.com>2019-02-27 11:05:13 +0000
commit8aadab7e96854bf8d43f117724089dc8d5869efd (patch)
treef9cbd40e118a2e6c2e1fd5a2533cdbe384f7c0a3 /src/soc/intel/cannonlake
parente64c25ca1a550132e1ad35208d6a71d553d57879 (diff)
soc/intel/cannonlake: Add a config for configuring SD_VDD1_PWR_EN#
SD controller in CNL-PCH provides a ability to configure the behavior of SD_VDD1_PWR_EN# as an active high or low signal. FSP provides an UPD "SdCardPowerEnableActiveHigh" to control the same. However, for platforms using SD_VDD1_PWR_EN# as active high, the SDXC card connector is always powered and may impact system power. This is because SD_VDD1_PWR_EN# does not de-assert during SDXC D3 or when SD card is not inserted. Workaround is to change the pad ownership of SD_VDD1_PWR_EN to GPIO and force the TX buffer to low in _PS3. And restore the pad mode to native function in _PS0. Hence add a Kconfig option to update the UPD, which the board can select based on how the SD_VDD1_PWR_EN is implemented on it. And, the workaround gets applied based on this config. BUG=b:123350329 Change-Id: Iee262d7ecdf8c31362aec3d95dd9b3e8359e0c25 Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com> Reviewed-on: https://review.coreboot.org/c/31445 Reviewed-by: Furquan Shaikh <furquan@google.com> Reviewed-by: Nico Huber <nico.h@gmx.de> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/cannonlake')
-rw-r--r--src/soc/intel/cannonlake/Kconfig9
-rw-r--r--src/soc/intel/cannonlake/acpi/scs.asl16
-rw-r--r--src/soc/intel/cannonlake/fsp_params.c7
-rw-r--r--src/soc/intel/cannonlake/include/soc/gpio_soc_defs.h2
4 files changed, 32 insertions, 2 deletions
diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig
index cd8819d2cc..927409d281 100644
--- a/src/soc/intel/cannonlake/Kconfig
+++ b/src/soc/intel/cannonlake/Kconfig
@@ -235,6 +235,15 @@ config CBFS_SIZE
hex
default 0x200000
+config MB_HAS_ACTIVE_HIGH_SD_PWR_ENABLE
+ bool
+ default n
+ help
+ Select this if the board has a SD_PWR_ENABLE pin connected to a
+ active high sensing load switch to turn on power to the card reader.
+ This will enable a workaround in ASL _PS3 and _PS0 methods to force
+ SD_PWR_ENABLE to stay low in D3.
+
choice
prompt "Cache-as-ram implementation"
default USE_CANNONLAKE_CAR_NEM_ENHANCED if MAINBOARD_HAS_CHROMEOS
diff --git a/src/soc/intel/cannonlake/acpi/scs.asl b/src/soc/intel/cannonlake/acpi/scs.asl
index 896fd77c19..1806e75e87 100644
--- a/src/soc/intel/cannonlake/acpi/scs.asl
+++ b/src/soc/intel/cannonlake/acpi/scs.asl
@@ -111,6 +111,11 @@ Scope (\_SB.PCI0) {
/* Set Power State to D0 */
And (PMCR, 0xFFFC, PMCR)
Store (PMCR, ^TEMP)
+
+#if IS_ENABLED(CONFIG_MB_HAS_ACTIVE_HIGH_SD_PWR_ENABLE)
+ /* Change pad mode to Native */
+ GPMO(SD_PWR_EN_PIN, 0x1)
+#endif
}
Method (_PS3, 0, Serialized)
@@ -120,6 +125,17 @@ Scope (\_SB.PCI0) {
/* Set Power State to D3 */
Or (PMCR, 0x0003, PMCR)
Store (PMCR, ^TEMP)
+
+#if IS_ENABLED(CONFIG_MB_HAS_ACTIVE_HIGH_SD_PWR_ENABLE)
+ /* Change pad mode to GPIO control */
+ GPMO(SD_PWR_EN_PIN, 0x0)
+
+ /* Enable Tx Buffer */
+ GTXE(SD_PWR_EN_PIN, 0x1)
+
+ /* Drive TX to zero */
+ CTXS(SD_PWR_EN_PIN)
+#endif
}
Device (CARD)
diff --git a/src/soc/intel/cannonlake/fsp_params.c b/src/soc/intel/cannonlake/fsp_params.c
index 17a014b97e..1ebde35e05 100644
--- a/src/soc/intel/cannonlake/fsp_params.c
+++ b/src/soc/intel/cannonlake/fsp_params.c
@@ -208,10 +208,13 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
}
dev = dev_find_slot(0, PCH_DEVFN_SDCARD);
- if (!dev)
+ if (!dev) {
params->ScsSdCardEnabled = 0;
- else
+ } else {
params->ScsSdCardEnabled = dev->enabled;
+ params->SdCardPowerEnableActiveHigh =
+ IS_ENABLED(CONFIG_MB_HAS_ACTIVE_HIGH_SD_PWR_ENABLE);
+ }
dev = dev_find_slot(0, PCH_DEVFN_UFS);
if (!dev)
diff --git a/src/soc/intel/cannonlake/include/soc/gpio_soc_defs.h b/src/soc/intel/cannonlake/include/soc/gpio_soc_defs.h
index 5d7c0e884c..03f431421f 100644
--- a/src/soc/intel/cannonlake/include/soc/gpio_soc_defs.h
+++ b/src/soc/intel/cannonlake/include/soc/gpio_soc_defs.h
@@ -352,4 +352,6 @@
#define NUM_GPIO_COM3_PADS (GPIO_RSVD_38 - HDA_BCLK + 1)
#define TOTAL_PADS 275
+
+#define SD_PWR_EN_PIN GPP_A17
#endif