path: root/arch/arm/mach-tegra/board-colibri_t20-power.c

/*
 * Copyright (C) 2011 Toradex, Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307, USA
 */

#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/io.h>
#include <linux/mfd/tps6586x.h>
#include <linux/platform_device.h>
#include <linux/regulator/machine.h>

#include <mach/iomap.h>
#include <mach/irqs.h>

#include "board-colibri_t20.h"
#include "board.h"
#include "fuse.h"
#include "gpio-names.h"
#include "pm.h"

#define PMC_CTRL		0x0
#define PMC_CTRL_INTR_LOW	(1 << 17)

/* VDD_CORE_1.2V */
static struct regulator_consumer_supply tps658621_sm0_supply[] = {
	REGULATOR_SUPPLY("vdd_core", NULL),
};

/* VDD_CPU_1.0V */
static struct regulator_consumer_supply tps658621_sm1_supply[] = {
	REGULATOR_SUPPLY("vdd_cpu", NULL),
};

/* VDD_DDR2_1.8V, LAN AX88772B VCC18A_ and NAND K9K8G08U0B VCC */
static struct regulator_consumer_supply tps658621_sm2_supply[] = {
	REGULATOR_SUPPLY("vdd_sm2", NULL),
};

/* unused */
static struct regulator_consumer_supply tps658621_ldo0_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo0", NULL),
};

/* AVDD_PLL_1.1V and +3.3V_ENABLE_N switching via FET: AVDD_AUDIO_S and +3.3V:
SMSC USB3340 VBAT, VDDIO
VCC_LAN
VDDIO_AUDIO
VDDIO_BB
VDDIO_LCD
VDDIO_NAND
VDDIO_SDIO
VDDIO_UART
VDDIO_VI */
static struct regulator_consumer_supply tps658621_ldo1_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo1", NULL),
	REGULATOR_SUPPLY("avdd_pll", NULL),
};

/* VDD_RTC_1.2V */
static struct regulator_consumer_supply tps658621_ldo2_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo2", NULL),
	REGULATOR_SUPPLY("vdd_rtc", NULL),
	REGULATOR_SUPPLY("vdd_aon", NULL),
};

/* unused */
static struct regulator_consumer_supply tps658621_ldo3_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo3", NULL),
};

/* VDDIO_SYS_1.8V and VDDIO_PMIC */
static struct regulator_consumer_supply tps658621_ldo4_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo4", NULL),
	REGULATOR_SUPPLY("avdd_osc", NULL),
};

/* +3.3V_USB switched via FET: AVDD_USB,
   +3.3V_FUSE switched via FET on FUSE_EN# (PMIC GPIO3)*/
static struct regulator_consumer_supply tps658621_ldo5_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo5", NULL),
	REGULATOR_SUPPLY("avdd_usb", NULL),
	REGULATOR_SUPPLY("avdd_usb_pll", NULL),
	/* fuse via separate GPIO FET (FUSE_ENABLE_N) */
	REGULATOR_SUPPLY("vdd_fuse", NULL),
};

/* AVDD_VDAC_2.85V */
static struct regulator_consumer_supply tps658621_ldo6_supply[] = {
	/* Off after boot, needs to be explicitly turned on! */
	REGULATOR_SUPPLY("vdd_ldo6", NULL),
	REGULATOR_SUPPLY("avdd_vdac", NULL),
};

/* AVDD_HDMI_3.3V */
static struct regulator_consumer_supply tps658621_ldo7_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo7", NULL),
	REGULATOR_SUPPLY("avdd_hdmi", NULL),
};

/* AVDD_HDMI_PLL_1.8V */
static struct regulator_consumer_supply tps658621_ldo8_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo8", NULL),
	REGULATOR_SUPPLY("avdd_hdmi_pll", NULL),
};

/* VDDIO_RX_DDR_2.85V */
static struct regulator_consumer_supply tps658621_ldo9_supply[] = {
	REGULATOR_SUPPLY("vdd_ldo9", NULL),
	REGULATOR_SUPPLY("vdd_ddr_rx", NULL),
};

static struct tps6586x_settings sm0_config = {
	.sm_pwm_mode	= PWM_DEFAULT_VALUE,
	.slew_rate	= SLEW_RATE_3520UV_PER_SEC,
};

static struct tps6586x_settings sm1_config = {
	/*
	 * Current TPS6586x is known for having a voltage glitch if current load
	 * changes from low to high in auto PWM/PFM mode for CPU's Vdd line.
	 */
	.sm_pwm_mode	= PWM_ONLY,
	.slew_rate	= SLEW_RATE_3520UV_PER_SEC,
};

#define REGULATOR_INIT(_id, _minmv, _maxmv, on, config)			\
	{								\
		.constraints = {					\
			.min_uV = (_minmv)*1000,			\
			.max_uV = (_maxmv)*1000,			\
			.valid_modes_mask = (REGULATOR_MODE_NORMAL |	\
					     REGULATOR_MODE_STANDBY),	\
			.valid_ops_mask = (REGULATOR_CHANGE_MODE |	\
					   REGULATOR_CHANGE_STATUS |	\
					   REGULATOR_CHANGE_VOLTAGE),	\
			.always_on = on,				\
			.apply_uV = 1,					\
		},							\
		.num_consumer_supplies = ARRAY_SIZE(tps658621_##_id##_supply),\
		.consumer_supplies = tps658621_##_id##_supply,		\
		.driver_data = config,					\
	}

#define ON	1
#define OFF	0

static struct regulator_init_data sm0_data = REGULATOR_INIT(sm0, 725, 1500, ON, &sm0_config);
static struct regulator_init_data sm1_data = REGULATOR_INIT(sm1, 725, 1500, ON, &sm1_config);
static struct regulator_init_data sm2_data = REGULATOR_INIT(sm2, 1700, 2475, ON, NULL);
static struct regulator_init_data ldo0_data = REGULATOR_INIT(ldo0, 1200, 3300, OFF, NULL);
static struct regulator_init_data ldo1_data = REGULATOR_INIT(ldo1, 725, 1500, ON, NULL);
static struct regulator_init_data ldo2_data = REGULATOR_INIT(ldo2, 725, 1500, OFF, NULL);
static struct regulator_init_data ldo3_data = REGULATOR_INIT(ldo3, 1250, 3300, OFF, NULL);
static struct regulator_init_data ldo4_data = REGULATOR_INIT(ldo4, 1700, 2475, ON, NULL);
static struct regulator_init_data ldo5_data = REGULATOR_INIT(ldo5, 1250, 3300, ON, NULL);
static struct regulator_init_data ldo6_data = REGULATOR_INIT(ldo6, 2850, 2850, OFF, NULL);
static struct regulator_init_data ldo7_data = REGULATOR_INIT(ldo7, 3300, 3300, OFF, NULL);
static struct regulator_init_data ldo8_data = REGULATOR_INIT(ldo8, 1800, 1800, OFF, NULL);
static struct regulator_init_data ldo9_data = REGULATOR_INIT(ldo9, 1250, 3300, OFF, NULL);

static struct tps6586x_rtc_platform_data rtc_data = {
	.irq = TEGRA_NR_IRQS + TPS6586X_INT_RTC_ALM1,
	.start = {
		.year	= 2009,
		.month	= 1,
		.day	= 1,
	},
	.cl_sel = TPS6586X_RTC_CL_SEL_1_5PF /* use lowest (external 20pF cap) */
};

#define TPS_REG(_id, _data)			\
	{					\
		.id = TPS6586X_ID_##_id,	\
		.name = "tps6586x-regulator",	\
		.platform_data = _data,		\
	}

static struct tps6586x_subdev_info tps_devs[] = {
	TPS_REG(SM_0, &sm0_data),
	TPS_REG(SM_1, &sm1_data),
	TPS_REG(SM_2, &sm2_data),
	TPS_REG(LDO_0, &ldo0_data),
	TPS_REG(LDO_1, &ldo1_data),
	TPS_REG(LDO_2, &ldo2_data),
	TPS_REG(LDO_3, &ldo3_data),
	TPS_REG(LDO_4, &ldo4_data),
	TPS_REG(LDO_5, &ldo5_data),
	TPS_REG(LDO_6, &ldo6_data),
	TPS_REG(LDO_7, &ldo7_data),
	TPS_REG(LDO_8, &ldo8_data),
	TPS_REG(LDO_9, &ldo9_data),
	{
		.id		= 0,
		.name		= "tps6586x-rtc",
		.platform_data	= &rtc_data,
	},
};

static struct tps6586x_platform_data tps_platform = {
	.irq_base	= TPS6586X_INT_BASE,
	.num_subdevs	= ARRAY_SIZE(tps_devs),
	.subdevs	= tps_devs,
	.gpio_base	= TPS6586X_GPIO_BASE,
	/* full PMIC power off decreases power consumption
	   but reset won't force a re-boot anymore */
	.use_power_off	= true,
};

static struct i2c_board_info __initdata colibri_t20_regulators[] = {
	{
		I2C_BOARD_INFO("tps6586x", 0x34),
			.irq		= INT_EXTERNAL_PMU,
			.platform_data	= &tps_platform,
	},
};

static void colibri_t20_board_suspend(int lp_state, enum suspend_stage stg)
{
	if ((lp_state == TEGRA_SUSPEND_LP1) && (stg == TEGRA_SUSPEND_BEFORE_CPU))
		tegra_console_uart_suspend();
}

static void colibri_t20_board_resume(int lp_state, enum resume_stage stg)
{
	if ((lp_state == TEGRA_SUSPEND_LP1) && (stg == TEGRA_RESUME_AFTER_CPU))
		tegra_console_uart_resume();
}

static struct tegra_suspend_platform_data colibri_t20_suspend_data = {
	/*
	 * Check power on time and crystal oscillator start time
	 * for appropriate settings.
	 */
	.cpu_timer	= 2000,
	.cpu_off_timer	= 100,
	.suspend_mode	= TEGRA_SUSPEND_LP1,
	.core_timer	= 0x7e7e,
	.core_off_timer = 0xf,
	.corereq_high	= false,
	.sysclkreq_high	= true,
	.board_suspend	= colibri_t20_board_suspend,
	.board_resume	= colibri_t20_board_resume,
};

int __init colibri_t20_regulator_init(void)
{
	void __iomem *pmc = IO_ADDRESS(TEGRA_PMC_BASE);
	u32 pmc_ctrl;
#if 0
//currently LP0 is anyway not supported
	void __iomem *chip_id = IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804;
	u32 minor;

	minor = (readl(chip_id) >> 16) & 0xf;
	/* A03 (but not A03p) chips do not support LP0 */
	if (minor == 3 && !(tegra_spare_fuse(18) || tegra_spare_fuse(19)))
		colibri_t20_suspend_data.suspend_mode = TEGRA_SUSPEND_LP1;
#endif

	/* configure the power management controller to trigger PMU
	 * interrupts when low */
	pmc_ctrl = readl(pmc + PMC_CTRL);
	writel(pmc_ctrl | PMC_CTRL_INTR_LOW, pmc + PMC_CTRL);

	i2c_register_board_info(4, colibri_t20_regulators, ARRAY_SIZE(colibri_t20_regulators));

//none of the Tegra 2 boards currently do this
//	regulator_has_full_constraints();

	tegra_init_suspend(&colibri_t20_suspend_data);

	return 0;
}