Change in coreboot[master]: mb/google/zork: support reading SSFC fields

[Peter Marheine (Code Review)]

Peter Marheine has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/51508 )

Change subject: mb/google/zork: support reading SSFC fields
......................................................................

mb/google/zork: support reading SSFC fields

Firmware needs to change behavior for auto-mode speaker amplifiers as
indicated by SSFC, so implement support for reading that from CBI.

Signed-off-by: Peter Marheine 
Change-Id: Ie5f644d70f43fc99af290a6a21cd427de8da0913
---
M src/mainboard/google/zork/variants/baseboard/Makefile.inc
A src/mainboard/google/zork/variants/baseboard/cbi_ssfc.c
A src/mainboard/google/zork/variants/baseboard/include/baseboard/cbi_ssfc.h
3 files changed, 55 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/08/51508/1

diff --git a/src/mainboard/google/zork/variants/baseboard/Makefile.inc b/src/mainboard/google/zork/variants/baseboard/Makefile.inc
index 2764a89..cb510ed 100644
--- a/src/mainboard/google/zork/variants/baseboard/Makefile.inc
+++ b/src/mainboard/google/zork/variants/baseboard/Makefile.inc
@@ -2,17 +2,20 @@

bootblock-y += gpio_baseboard_common.c
 bootblock-y += helpers.c
+bootblock-y += cbi_ssfc.c
 bootblock-$(CONFIG_BOARD_GOOGLE_BASEBOARD_TREMBYLE) += gpio_baseboard_trembyle.c
 bootblock-$(CONFIG_BOARD_GOOGLE_BASEBOARD_DALBOZ) += gpio_baseboard_dalboz.c

verstage-y += gpio_baseboard_common.c
 verstage-y += helpers.c
+verstage-y += cbi_ssfc.c
 verstage-$(CONFIG_BOARD_GOOGLE_BASEBOARD_TREMBYLE) += gpio_baseboard_trembyle.c
 verstage-$(CONFIG_BOARD_GOOGLE_BASEBOARD_DALBOZ) += gpio_baseboard_dalboz.c
 verstage-y += tpm_tis.c

romstage-y += gpio_baseboard_common.c
 romstage-y += helpers.c
+romstage-y += cbi_ssfc.c
 romstage-$(CONFIG_BOARD_GOOGLE_BASEBOARD_TREMBYLE) += gpio_baseboard_trembyle.c
 romstage-$(CONFIG_BOARD_GOOGLE_BASEBOARD_DALBOZ) += gpio_baseboard_dalboz.c
 romstage-y += tpm_tis.c
@@ -23,6 +26,7 @@
 ramstage-$(CONFIG_BOARD_GOOGLE_BASEBOARD_DALBOZ) += gpio_baseboard_dalboz.c
 ramstage-$(CONFIG_BOARD_GOOGLE_BASEBOARD_DALBOZ) += fsps_baseboard_dalboz.c
 ramstage-y += helpers.c
+ramstage-y += cbi_ssfc.c
 ramstage-y += tpm_tis.c
 ramstage-y += ramstage_common.c

diff --git a/src/mainboard/google/zork/variants/baseboard/cbi_ssfc.c b/src/mainboard/google/zork/variants/baseboard/cbi_ssfc.c
new file mode 100644
index 0000000..8666bf5
--- /dev/null
+++ b/src/mainboard/google/zork/variants/baseboard/cbi_ssfc.c
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <console/console.h>
+#include <ec/google/chromeec/ec.h>
+
+#include <baseboard/cbi_ssfc.h>
+
+static uint32_t get_ssfc(void)
+{
+	static uint32_t value;
+	static bool read_once = false;
+
+	if (!read_once) {
+		/* Errors will read the (safe) default value of all zero */
+		if (google_chromeec_cbi_get_ssfc(&value) != 0)
+			printk(BIOS_INFO,
+			       "SSFC is unset in CBI; assuming default");
+		read_once = true;
+	}
+	return value;
+}
+
+enum ec_ssfc_spkr_auto_mode ssfc_get_spkr_auto_mode(void)
+{
+	return (get_ssfc() & SSFC_SPKR_AUTO_MODE_MASK)
+	       >> SSFC_SPKR_AUTO_MODE_OFFSET;
+}
diff --git a/src/mainboard/google/zork/variants/baseboard/include/baseboard/cbi_ssfc.h b/src/mainboard/google/zork/variants/baseboard/include/baseboard/cbi_ssfc.h
new file mode 100644
index 0000000..0d08617
--- /dev/null
+++ b/src/mainboard/google/zork/variants/baseboard/include/baseboard/cbi_ssfc.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef MAINBOARD_SSFC_H
+#define MAINBOARD_SSFC_H
+
+enum ec_ssfc_base_gyro_sensor {
+	SSFC_BASE_GYRO_NONE = 0,
+	SSFC_BASE_GYRO_BMI160 = 1,
+	SSFC_BASE_GYRO_LSM6DSM = 2,
+	SSFC_BASE_GYRO_ICM426XX = 3,
+};
+#define SSFC_BASE_GYRO_OFFSET 0
+#define SSFC_BASE_GYRO_MASK (0x07 << SSFC_BASE_GYRO_OFFSET)
+
+enum ec_ssfc_spkr_auto_mode {
+	SSFC_SPKR_AUTO_MODE_OFF = 0,
+	SSFC_SPKR_AUTO_MODE_ON = 1,
+};
+#define SSFC_SPKR_AUTO_MODE_OFFSET 3
+#define SSFC_SPKR_AUTO_MODE_MASK (1 << SSFC_SPKR_AUTO_MODE_OFFSET)
+
+enum ec_ssfc_spkr_auto_mode ssfc_get_spkr_auto_mode(void);
+
+#endif