mb/google/octopus/variants/garg: support LTE power sequence

GPIOs related to power sequnce are
  GPIO_67  - EN_PP3300
  GPIO_117 - FULL_CARD_POWER_ON_OFF
  GPIO_161 - PLT_RST_LTE_L
1. Power on: GPIO_67 -> 0ms -> GPIO_117 -> 30ms -> GPIO_161
2. Power off: GPIO_161 -> 30ms -> GPIO_117 -> 100ms -> GPIO_67
3. Power reset:
  - keep GPIO_67 and GPIO_117 high and
  - pull down GPIO_161 for 30ms then release it.

BUG=b:137033609
BRANCH=octopus
TEST=build image and verify on the DUT with LTE DB.

Change-Id: I7bf6fee087c885c22363b44aa98aa61f91be90b4
Signed-off-by: Marco Chen <marcochen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34188
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

2 files changed, 90 insertions, 0 deletions

diff --git a/src/mainboard/google/octopus/variants/garg/gpio.c b/src/mainboard/google/octopus/variants/garg/gpio.c
index 90601ce850..36fde90631 100644
--- a/src/mainboard/google/octopus/variants/garg/gpio.c
+++ b/src/mainboard/google/octopus/variants/garg/gpio.c
@@ -50,6 +50,28 @@ static const struct pad_config hdmi_override_table[] = {
 				     DISPUPD),
 
 	PAD_NC(GPIO_213, DN_20K),
+
+};
+
+static const struct pad_config lte_override_table[] = {
+	/* Default override table. */
+	PAD_NC(GPIO_104, UP_20K),
+
+	/* EN_PP3300_TOUCHSCREEN */
+	PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 0, DEEP, NONE, Tx0RxDCRx0,
+				     DISPUPD),
+
+	PAD_NC(GPIO_213, DN_20K),
+
+	/* Be specific to LTE SKU */
+	/* UART2-CTS_B -- EN_PP3300_DX_LTE_SOC */
+	PAD_CFG_GPO(GPIO_67, 1, PWROK),
+
+	/* PCIE_WAKE1_B -- FULL_CARD_POWER_OFF */
+	PAD_CFG_GPO(GPIO_117, 1, PWROK),
+
+	/* AVS_I2S1_MCLK -- PLT_RST_LTE_L */
+	PAD_CFG_GPO(GPIO_161, 1, DEEP),
 };
 
 const struct pad_config *variant_override_gpio_table(size_t *num)
@@ -61,8 +83,29 @@ const struct pad_config *variant_override_gpio_table(size_t *num)
 	case SKU_9_HDMI:
 		*num = ARRAY_SIZE(hdmi_override_table);
 		return hdmi_override_table;
+	case SKU_17_LTE:
+		*num = ARRAY_SIZE(lte_override_table);
+		return lte_override_table;
 	default:
 		*num = ARRAY_SIZE(default_override_table);
 		return default_override_table;
 	}
 }
+
+static const struct pad_config lte_early_override_table[] = {
+	/* UART2-CTS_B -- EN_PP3300_DX_LTE_SOC */
+	PAD_CFG_GPO(GPIO_67, 1, PWROK),
+
+	/* PCIE_WAKE1_B -- FULL_CARD_POWER_OFF */
+	PAD_CFG_GPO(GPIO_117, 1, PWROK),
+
+	/* AVS_I2S1_MCLK -- PLT_RST_LTE_L */
+	PAD_CFG_GPO(GPIO_161, 0, DEEP),
+};
+
+const struct pad_config *variant_early_override_gpio_table(size_t *num)
+{
+	*num = ARRAY_SIZE(lte_early_override_table);
+
+	return lte_early_override_table;
+}
diff --git a/src/mainboard/google/octopus/variants/garg/variant.c b/src/mainboard/google/octopus/variants/garg/variant.c
index a3efe3f802..2754e640f9 100644
--- a/src/mainboard/google/octopus/variants/garg/variant.c
+++ b/src/mainboard/google/octopus/variants/garg/variant.c
@@ -13,10 +13,13 @@
  * GNU General Public License for more details.
  */
 
+#include <arch/acpi.h>
 #include <boardid.h>
 #include <ec/google/chromeec/ec.h>
 #include <drivers/intel/gma/opregion.h>
 #include <baseboard/variants.h>
+#include <delay.h>
+#include <gpio.h>
 
 enum {
 	SKU_1_2A2C = 1,
@@ -24,6 +27,34 @@ enum {
 	SKU_17_LTE = 17,
 };
 
+struct gpio_with_delay {
+	gpio_t gpio;
+	unsigned int delay_msecs;
+};
+
+static void power_off_lte_module(u8 slp_typ)
+{
+	const struct gpio_with_delay lte_power_off_gpios[] = {
+		{
+			GPIO_161, /* AVS_I2S1_MCLK -- PLT_RST_LTE_L */
+			30,
+		},
+		{
+			GPIO_117, /* PCIE_WAKE1_B -- FULL_CARD_POWER_OFF */
+			100
+		},
+		{
+			GPIO_67, /* UART2-CTS_B -- EN_PP3300_DX_LTE_SOC */
+			0
+		}
+	};
+
+	for (int i = 0; i < ARRAY_SIZE(lte_power_off_gpios); i++) {
+		gpio_output(lte_power_off_gpios[i].gpio, 0);
+		mdelay(lte_power_off_gpios[i].delay_msecs);
+	}
+}
+
 const char *mainboard_vbt_filename(void)
 {
 	uint32_t sku_id;
@@ -37,3 +68,19 @@ const char *mainboard_vbt_filename(void)
 		return "vbt.bin";
 	}
 }
+
+void variant_smi_sleep(u8 slp_typ)
+{
+	/* Currently use cases here all target to S5 therefore we do early return
+	 * here for saving one transaction to the EC for getting SKU ID. */
+	if (slp_typ != ACPI_S5)
+		return;
+
+	switch (get_board_sku()) {
+	case SKU_17_LTE:
+		power_off_lte_module(slp_typ);
+		return;
+	default:
+		return;
+	}
+}