platform/msm8960/gpio.c

/* Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above
 *    copyright notice, this list of conditions and the following
 *    disclaimer in the documentation and/or other materials provided
 *    with the distribution.
 *  * Neither the name of Code Aurora Forum, Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <debug.h>
#include <reg.h>
#include <platform/iomap.h>
#include <platform/gpio.h>
#include <gsbi.h>
#include <dev/pm8921.h>
#include <sys/types.h>

void gpio_tlmm_config(uint32_t gpio, uint8_t func,
		      uint8_t dir, uint8_t pull,
		      uint8_t drvstr, uint32_t enable)
{
	unsigned int val = 0;
	val |= pull;
	val |= func << 2;
	val |= drvstr << 6;
	val |= enable << 9;
	unsigned int *addr = (unsigned int *)GPIO_CONFIG_ADDR(gpio);
	writel(val, addr);
	return;
}

void gpio_set(uint32_t gpio, uint32_t dir)
{
	unsigned int *addr = (unsigned int *)GPIO_IN_OUT_ADDR(gpio);
	writel(dir, addr);
	return;
}

/* Configure gpio for uart - based on gsbi id */
void gpio_config_uart_dm(uint8_t id)
{
	switch (id) {

	case GSBI_ID_3:
		/* configure rx gpio */
		gpio_tlmm_config(15, 1, GPIO_INPUT, GPIO_NO_PULL,
				 GPIO_8MA, GPIO_DISABLE);
		/* configure tx gpio */
		gpio_tlmm_config(14, 1, GPIO_OUTPUT, GPIO_NO_PULL,
				 GPIO_8MA, GPIO_DISABLE);
		break;

	case GSBI_ID_5:
		/* configure rx gpio */
		gpio_tlmm_config(23, 1, GPIO_INPUT, GPIO_NO_PULL,
				 GPIO_8MA, GPIO_DISABLE);
		/* configure tx gpio */
		gpio_tlmm_config(22, 1, GPIO_OUTPUT, GPIO_NO_PULL,
				 GPIO_8MA, GPIO_DISABLE);
		break;

	default:
		ASSERT(0);
	}
}

struct pm8xxx_gpio_init {
	uint32_t gpio;
	struct pm8921_gpio config;
};

#define PM8XXX_GPIO_INIT(_gpio, _dir, _buf, _val, _pull, _vin, _out_strength, \
			_func, _inv, _disable) \
{ \
	.gpio	= _gpio, \
	.config	= { \
		.direction	= _dir, \
		.output_buffer	= _buf, \
		.output_value	= _val, \
		.pull		= _pull, \
		.vin_sel	= _vin, \
		.out_strength	= _out_strength, \
		.function	= _func, \
		.inv_int_pol	= _inv, \
		.disable_pin	= _disable, \
	} \
}

#define PM8XXX_GPIO_OUTPUT(_gpio, _val) \
	PM8XXX_GPIO_INIT(_gpio, PM_GPIO_DIR_OUT, 0, _val, \
			PM_GPIO_PULL_NO, 2, \
			PM_GPIO_STRENGTH_HIGH, \
			PM_GPIO_FUNC_NORMAL, 1, 0)


#define PM8XXX_GPIO_INPUT(_gpio, _pull) \
	PM8XXX_GPIO_INIT(_gpio, PM_GPIO_DIR_IN, 0, 0, \
			_pull, 2, \
			PM_GPIO_STRENGTH_NO, \
			PM_GPIO_FUNC_NORMAL, 1, 0)

/* Initial pm8038 GPIO configurations */
static struct pm8xxx_gpio_init pm8038_keypad_gpios[] = {
	/* keys GPIOs */
	PM8XXX_GPIO_INPUT(PM_GPIO(3), PM_GPIO_PULL_UP_1_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(8), PM_GPIO_PULL_UP_1_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(10), PM_GPIO_PULL_UP_1_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(11), PM_GPIO_PULL_UP_1_5),
};

static struct pm8xxx_gpio_init pm8921_keypad_gpios[] = {
	/* keys GPIOs */
	PM8XXX_GPIO_INPUT(PM_GPIO(1), PM_GPIO_PULL_UP_31_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(2), PM_GPIO_PULL_UP_31_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(3), PM_GPIO_PULL_UP_31_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(4), PM_GPIO_PULL_UP_31_5),
	PM8XXX_GPIO_INPUT(PM_GPIO(5), PM_GPIO_PULL_UP_31_5),
	PM8XXX_GPIO_OUTPUT(PM_GPIO(9), 0),
};

void msm8960_keypad_gpio_init()
{
		int i = 0;
		int num = 0;

		num = ARRAY_SIZE(pm8921_keypad_gpios);

		for(i=0; i < num; i++)
		{
			pm8921_gpio_config(pm8921_keypad_gpios[i].gpio,
								&(pm8921_keypad_gpios[i].config));
		}
}

void msm8930_keypad_gpio_init()
{
		int i = 0;
		int num = 0;

		num = ARRAY_SIZE(pm8038_keypad_gpios);

		for(i=0; i < num; i++)
		{
			pm8921_gpio_config(pm8038_keypad_gpios[i].gpio,
								&(pm8038_keypad_gpios[i].config));
		}
}