[coreboot-gerrit] Change in coreboot[master]: soc/intel/common/lpss: Add lpss_is_controller_in_reset
Furquan Shaikh (Code Review)
gerrit at coreboot.org
Sat Aug 5 03:38:29 CEST 2017
Furquan Shaikh has uploaded this change for review. ( https://review.coreboot.org/20885
Change subject: soc/intel/common/lpss: Add lpss_is_controller_in_reset
......................................................................
soc/intel/common/lpss: Add lpss_is_controller_in_reset
Add new API function lpss_is_controller_in_reset that returns whether
the LPSS controller is in reset. Also, add lpss.c to smm stage so that
lpss_is_controller_in_reset can be used in smihandler.
BUG=b:64030366
Change-Id: I0fe5c2890ee799b08482e487296a483fa8d42461
Signed-off-by: Furquan Shaikh <furquan at chromium.org>
---
M src/soc/intel/common/block/include/intelblocks/lpss.h
M src/soc/intel/common/block/lpss/Makefile.inc
M src/soc/intel/common/block/lpss/lpss.c
3 files changed, 15 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/85/20885/1
diff --git a/src/soc/intel/common/block/include/intelblocks/lpss.h b/src/soc/intel/common/block/include/intelblocks/lpss.h
index 03a4714..138340d 100644
--- a/src/soc/intel/common/block/include/intelblocks/lpss.h
+++ b/src/soc/intel/common/block/include/intelblocks/lpss.h
@@ -27,4 +27,7 @@
*/
void lpss_clk_update(uintptr_t base, uint32_t clk_m_val, uint32_t clk_n_val);
+/* Check if controller is in reset. */
+bool lpss_is_controller_in_reset(uintptr_t base);
+
#endif /* SOC_INTEL_COMMON_BLOCK_LPSS_H */
diff --git a/src/soc/intel/common/block/lpss/Makefile.inc b/src/soc/intel/common/block/lpss/Makefile.inc
index 50d1c10..6ed654f 100644
--- a/src/soc/intel/common/block/lpss/Makefile.inc
+++ b/src/soc/intel/common/block/lpss/Makefile.inc
@@ -2,3 +2,4 @@
romstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_LPSS) += lpss.c
verstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_LPSS) += lpss.c
ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_LPSS) += lpss.c
+smm-$(CONFIG_SOC_INTEL_COMMON_BLOCK_LPSS) += lpss.c
diff --git a/src/soc/intel/common/block/lpss/lpss.c b/src/soc/intel/common/block/lpss/lpss.c
index 146fdab..feacef3 100644
--- a/src/soc/intel/common/block/lpss/lpss.c
+++ b/src/soc/intel/common/block/lpss/lpss.c
@@ -39,6 +39,17 @@
/* DMA Software Reset Control */
#define LPSS_DMA_RST_RELEASE (1 << 2)
+bool lpss_is_controller_in_reset(uintptr_t base)
+{
+ uint8_t *addr = (void *)base;
+ uint32_t val = read32(addr + LPSS_RESET_CTL_REG);
+
+ if (val == 0xFFFFFFFF)
+ return true;
+
+ return !(val & LPSS_CNT_RST_RELEASE);
+}
+
void lpss_reset_release(uintptr_t base)
{
uint8_t *addr = (void *)base;
--
To view, visit https://review.coreboot.org/20885
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I0fe5c2890ee799b08482e487296a483fa8d42461
Gerrit-Change-Number: 20885
Gerrit-PatchSet: 1
Gerrit-Owner: Furquan Shaikh <furquan at google.com>
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