board: asus: grouper: add Google Nexus 7 (2012) support

Nexus 7 is a mini tablet computer co-developed by Google and Asus
that runs the Android operating system. The Nexus 7 features a 7"
display, an Nvidia Tegra 3 quad-core chip, 1 GB of RAM and 8/16 GB
of internal storage.

This patch brings support for all 3 known ASUS/Google devices:
- Nexus 7 (2012) E1565
- Nexus 7 (2012) PM269
- Nexus 7 (2012) 3G - tilapia

Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS Grouper E1565
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # ASUS Grouper E1565
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 202 insertions, 0 deletions

diff --git a/board/asus/grouper/grouper.c b/board/asus/grouper/grouper.c
new file mode 100644
index 0000000000..2769313e68
--- /dev/null
+++ b/board/asus/grouper/grouper.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *  (C) Copyright 2010-2013
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ *  (C) Copyright 2021
+ *  Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <env.h>
+#include <fdt_support.h>
+#include <i2c.h>
+#include <log.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/gp_padctrl.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch-tegra/fuse.h>
+#include <asm/gpio.h>
+#include <linux/delay.h>
+#include "pinmux-config-grouper.h"
+
+#define TPS65911_I2C_ADDRESS		0x2D
+
+#define TPS65911_REG_LDO1		0x30
+#define TPS65911_REG_DEVCTRL		0x3F
+#define   DEVCTRL_PWR_OFF_MASK		BIT(7)
+#define   DEVCTRL_DEV_ON_MASK		BIT(2)
+#define   DEVCTRL_DEV_OFF_MASK		BIT(0)
+
+#define MAX77663_I2C_ADDRESS		0x3C
+
+#define MAX77663_REG_SD2		0x18
+#define MAX77663_REG_LDO3		0x29
+#define MAX77663_REG_ONOFF_CFG1		0x41
+#define   ONOFF_PWR_OFF			BIT(1)
+
+#ifdef CONFIG_CMD_POWEROFF
+#ifdef CONFIG_GROUPER_TPS65911
+int do_poweroff(struct cmd_tbl *cmdtp,
+		int flag, int argc, char *const argv[])
+{
+	struct udevice *dev;
+	uchar data_buffer[1];
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(0, TPS65911_I2C_ADDRESS, 1, &dev);
+	if (ret) {
+		log_debug("cannot find PMIC I2C chip\n");
+		return 0;
+	}
+
+	ret = dm_i2c_read(dev, TPS65911_REG_DEVCTRL, data_buffer, 1);
+	if (ret)
+		return ret;
+
+	data_buffer[0] |= DEVCTRL_PWR_OFF_MASK;
+
+	ret = dm_i2c_write(dev, TPS65911_REG_DEVCTRL, data_buffer, 1);
+	if (ret)
+		return ret;
+
+	data_buffer[0] |= DEVCTRL_DEV_OFF_MASK;
+	data_buffer[0] &= ~DEVCTRL_DEV_ON_MASK;
+
+	ret = dm_i2c_write(dev, TPS65911_REG_DEVCTRL, data_buffer, 1);
+	if (ret)
+		return ret;
+
+	// wait some time and then print error
+	mdelay(5000);
+
+	printf("Failed to power off!!!\n");
+	return 1;
+}
+#endif /* CONFIG_GROUPER_TPS65911 */
+
+#ifdef CONFIG_GROUPER_MAX77663
+int do_poweroff(struct cmd_tbl *cmdtp,
+		int flag, int argc, char *const argv[])
+{
+	struct udevice *dev;
+	uchar data_buffer[1];
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(0, MAX77663_I2C_ADDRESS, 1, &dev);
+	if (ret) {
+		log_debug("cannot find PMIC I2C chip\n");
+		return 0;
+	}
+
+	ret = dm_i2c_read(dev, MAX77663_REG_ONOFF_CFG1, data_buffer, 1);
+	if (ret)
+		return ret;
+
+	data_buffer[0] |= ONOFF_PWR_OFF;
+
+	ret = dm_i2c_write(dev, MAX77663_REG_ONOFF_CFG1, data_buffer, 1);
+	if (ret)
+		return ret;
+
+	// wait some time and then print error
+	mdelay(5000);
+
+	printf("Failed to power off!!!\n");
+	return 1;
+}
+#endif /* CONFIG_GROUPER_MAX77663 */
+#endif /* CONFIG_CMD_POWEROFF */
+
+/*
+ * Routine: pinmux_init
+ * Description: Do individual peripheral pinmux configs
+ */
+void pinmux_init(void)
+{
+	pinmux_config_pingrp_table(grouper_pinmux_common,
+		ARRAY_SIZE(grouper_pinmux_common));
+
+	pinmux_config_drvgrp_table(grouper_padctrl,
+		ARRAY_SIZE(grouper_padctrl));
+}
+
+#ifdef CONFIG_MMC_SDHCI_TEGRA
+static void __maybe_unused tps65911_voltage_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(0, TPS65911_I2C_ADDRESS, 1, &dev);
+	if (ret) {
+		log_debug("cannot find PMIC I2C chip\n");
+		return;
+	}
+
+	/* TPS659110: LDO1_REG = 3.3v, ACTIVE to SDMMC4 */
+	ret = dm_i2c_reg_write(dev, TPS65911_REG_LDO1, 0xC9);
+	if (ret)
+		log_debug("vcore_emmc set failed: %d\n", ret);
+}
+
+static void __maybe_unused max77663_voltage_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(0, MAX77663_I2C_ADDRESS, 1, &dev);
+	if (ret) {
+		log_debug("cannot find PMIC I2C chip\n");
+		return;
+	}
+
+	/* 0x60 for 1.8v, bit7:0 = voltage */
+	ret = dm_i2c_reg_write(dev, MAX77663_REG_SD2, 0x60);
+	if (ret)
+		log_debug("vdd_1v8_vio set failed: %d\n", ret);
+
+	/* 0xEC for 3.00v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */
+	ret = dm_i2c_reg_write(dev, MAX77663_REG_LDO3, 0xEC);
+	if (ret)
+		log_debug("vcore_emmc set failed: %d\n", ret);
+}
+
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the MMC muxes, power rails, etc.
+ */
+void pin_mux_mmc(void)
+{
+#ifdef CONFIG_GROUPER_MAX77663
+	/* Bring up eMMC power on MAX PMIC */
+	max77663_voltage_init();
+#endif
+
+#ifdef CONFIG_GROUPER_TPS65911
+	/* Bring up eMMC power on TI PMIC */
+	tps65911_voltage_init();
+#endif
+}
+#endif	/* MMC */
+
+#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
+int ft_board_setup(void *blob, struct bd_info *bd)
+{
+	/* Remove TrustZone nodes */
+	fdt_del_node_and_alias(blob, "/firmware");
+	fdt_del_node_and_alias(blob, "/reserved-memory/trustzone@bfe00000");
+
+	return 0;
+}
+#endif
+
+void nvidia_board_late_init(void)
+{
+	char serialno_str[17];
+
+	/* Set chip id as serialno */
+	sprintf(serialno_str, "%016llx", tegra_chip_uid());
+	env_set("serial#", serialno_str);
+	env_set("platform", "Tegra 3 T30");
+}