Change in coreboot[master]: mb/google/octopus/var/bobba: Update GPIO config for bobba bid >= 1

[Justin TerAvest (Code Review)]

Justin TerAvest has uploaded this change for review. ( https://review.coreboot.org/28071

Change subject: mb/google/octopus/var/bobba: Update GPIO config for bobba bid >= 1
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mb/google/octopus/var/bobba: Update GPIO config for bobba bid >= 1

This change updates GPIO configuration for bobba boards with id >= 1
This follows the same model as fleex:
a. Dynamically update touchscreen power enable GPIO in devicetree.
b. Provide default and bid0 tables for GPIO configuration in ramstage.
c. Configure WLAN enable GPIO differently in bootblock based on
boardid.

BUG=b:112354568
TEST=Built firmware for bobba

Change-Id: Id4ee4a1815e16ddfe60ed268688a8aaf4fb75579
Signed-off-by: Justin TerAvest 
---
A src/mainboard/google/octopus/variants/bobba/Makefile.inc
A src/mainboard/google/octopus/variants/bobba/gpio.c
A src/mainboard/google/octopus/variants/bobba/variant.c
3 files changed, 172 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/71/28071/1

diff --git a/src/mainboard/google/octopus/variants/bobba/Makefile.inc b/src/mainboard/google/octopus/variants/bobba/Makefile.inc
new file mode 100644
index 0000000..d54ed40
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/bobba/Makefile.inc
@@ -0,0 +1,4 @@
+bootblock-y += gpio.c
+
+ramstage-y += variant.c
+ramstage-y += gpio.c
diff --git a/src/mainboard/google/octopus/variants/bobba/gpio.c b/src/mainboard/google/octopus/variants/bobba/gpio.c
new file mode 100644
index 0000000..4b9b7b2
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/bobba/gpio.c
@@ -0,0 +1,95 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ */
+
+#include <baseboard/gpio.h>
+#include <baseboard/variants.h>
+#include <boardid.h>
+#include <gpio.h>
+#include <soc/gpio.h>
+
+static const struct pad_config default_override_table[] = {
+	PAD_NC(GPIO_104, UP_20K),
+
+	/* CAM_SOC_EC_SYNC */
+	PAD_CFG_GPI_APIC_IOS(GPIO_134, NONE, DEEP, EDGE_SINGLE, INVERT, TxDRxE,
+			     DISPUPD),
+
+	/* EN_PP3300_TOUCHSCREEN */
+	PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 0, DEEP, NONE, Tx0RxDCRx0,
+				     DISPUPD),
+
+	/* EN_PP3300_WLAN_L */
+	PAD_CFG_GPO(GPIO_178, 0, DEEP),
+};
+
+const struct pad_config *variant_override_gpio_table(size_t *num)
+{
+	const struct pad_config *c;
+	switch (board_id()) {
+	case 0:
+	case UNDEFINED_STRAPPING_ID:
+		*num = 0;
+		break;
+	default:
+		c = default_override_table;
+		*num = ARRAY_SIZE(default_override_table);
+	}
+	return c;
+}
+
+/* GPIOs needed prior to ramstage. */
+static const struct pad_config early_gpio_table[] = {
+	/* PCH_WP_OD */
+	PAD_CFG_GPI(GPIO_190, NONE, DEEP),
+	/* H1_PCH_INT_ODL */
+	PAD_CFG_GPI_APIC_IOS(GPIO_63, NONE, DEEP, EDGE_SINGLE, INVERT, TxDRxE,
+			     DISPUPD),
+	/* H1_SLAVE_SPI_CLK_R */
+	PAD_CFG_NF(GPIO_79, NONE, DEEP, NF1),
+	/* H1_SLAVE_SPI_CS_L_R */
+	PAD_CFG_NF(GPIO_80, NONE, DEEP, NF1),
+	/* H1_SLAVE_SPI_MISO */
+	PAD_CFG_NF(GPIO_82, NONE, DEEP, NF1),
+	/* H1_SLAVE_SPI_MOSI_R */
+	PAD_CFG_NF(GPIO_83, NONE, DEEP, NF1),
+
+	/* WLAN_PE_RST */
+	PAD_CFG_GPO(GPIO_164, 0, DEEP),
+
+	/*
+	 * ESPI_IO1 acts as ALERT# (which is open-drain) and requies a weak
+	 * pull-up for proper operation. Since there is no external pull present
+	 * on this platform, configure an internal weak pull-up.
+	 */
+	PAD_CFG_NF_IOSSTATE_IOSTERM(GPIO_151, UP_20K, DEEP, NF2, HIZCRx1,
+				    ENPU),
+};
+
+const struct pad_config *variant_early_gpio_table(size_t *num)
+{
+	/*
+	 * This is a hack to configure EN_PP3300_WLAN based on board id. Once
+	 * board id 0 is deprecated, we can get rid of this.
+	 */
+	uint32_t bid = board_id();
+
+	if (bid == UNDEFINED_STRAPPING_ID || bid < 1)
+		gpio_output(GPIO_178, 1);
+	else
+		gpio_output(GPIO_178, 0);
+
+	*num = ARRAY_SIZE(early_gpio_table);
+	return early_gpio_table;
+}
diff --git a/src/mainboard/google/octopus/variants/bobba/variant.c b/src/mainboard/google/octopus/variants/bobba/variant.c
new file mode 100644
index 0000000..1ead5e2
--- /dev/null
+++ b/src/mainboard/google/octopus/variants/bobba/variant.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/acpi_device.h>
+#include <baseboard/variants.h>
+#include <boardid.h>
+#include <device/device.h>
+#include <drivers/i2c/generic/chip.h>
+#include <drivers/i2c/hid/chip.h>
+#include <soc/gpio.h>
+#include <soc/pci_devs.h>
+#include <string.h>
+
+extern struct chip_operations drivers_i2c_generic_ops;
+extern struct chip_operations drivers_i2c_hid_ops;
+
+void variant_update_devtree(struct device *dev)
+{
+	uint32_t bid;
+	struct device *touchscreen_i2c_host;
+	struct device *child;
+	const struct bus *children_bus;
+	static const struct acpi_gpio new_enable_gpio =
+		ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_146);
+
+	bid = board_id();
+
+	/* Nothing to update. */
+	if (bid == UNDEFINED_STRAPPING_ID || bid < 1)
+		return;
+
+	touchscreen_i2c_host = dev_find_slot(0, PCH_DEVFN_I2C7);
+
+	if (touchscreen_i2c_host == NULL)
+		return;
+
+	children_bus = touchscreen_i2c_host->link_list;
+	child = NULL;
+
+	/* Find all children on bus to update touchscreen enable gpio. */
+	while ((child = dev_bus_each_child(children_bus, child)) != NULL) {
+		struct drivers_i2c_generic_config *cfg;
+
+		/* No configration to change. */
+		if (child->chip_info == NULL)
+			continue;
+
+		if (child->chip_ops == &drivers_i2c_generic_ops)
+			cfg = child->chip_info;
+		else if (child->chip_ops == &drivers_i2c_hid_ops) {
+			struct drivers_i2c_hid_config *hid_cfg;
+			hid_cfg = child->chip_info;
+			cfg = &hid_cfg->generic;
+		} else
+			continue;
+
+		/* Update the enable gpio. */
+		memcpy(&cfg->enable_gpio, &new_enable_gpio,
+			sizeof(new_enable_gpio));
+	}
+}