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365d607033
u-boot/drivers/gpio/da8xx_gpio.c
Joe Hershberger 365d607033 gpio: Replace ARM gpio.h with the common API in include/asm-generic 
ARM boards should use the generic GPIO API
This means changing gpio to unsigned type
Remove the unused gpio_toggle() function which is not part of the API
Comment that free should not modify pin state

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>

fixed merge conflict in da8xx_gpio.c, tegra2_gpio.c, and
extended to the new mxs_gpio.c.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
2012-01-09 20:10:32 -06:00

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/*
* GPIO driver for TI DaVinci DA8xx SOCs.
*
* (C) Copyright 2011 Guralp Systems Ltd.
* Laurence Withers <lwithers@guralp.com>
*
* 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; either version 2 of
* the License, or (at your option) any later version.
*
* 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 <common.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <asm/arch/hardware.h>
#include <asm/arch/davinci_misc.h>
static struct gpio_registry {
int is_registered;
char name[GPIO_NAME_SIZE];
} gpio_registry[MAX_NUM_GPIOS];
#define pinmux(x) (&davinci_syscfg_regs->pinmux[x])
static const struct pinmux_config gpio_pinmux[] = {
{ pinmux(1), 8, 7 }, /* GP0[0] */
{ pinmux(1), 8, 6 },
{ pinmux(1), 8, 5 },
{ pinmux(1), 8, 4 },
{ pinmux(1), 8, 3 },
{ pinmux(1), 8, 2 },
{ pinmux(1), 8, 1 },
{ pinmux(1), 8, 0 },
{ pinmux(0), 8, 7 },
{ pinmux(0), 8, 6 },
{ pinmux(0), 8, 5 },
{ pinmux(0), 8, 4 },
{ pinmux(0), 8, 3 },
{ pinmux(0), 8, 2 },
{ pinmux(0), 8, 1 },
{ pinmux(0), 8, 0 },
{ pinmux(4), 8, 7 }, /* GP1[0] */
{ pinmux(4), 8, 6 },
{ pinmux(4), 8, 5 },
{ pinmux(4), 8, 4 },
{ pinmux(4), 8, 3 },
{ pinmux(4), 8, 2 },
{ pinmux(4), 4, 1 },
{ pinmux(4), 4, 0 },
{ pinmux(3), 4, 0 },
{ pinmux(2), 4, 6 },
{ pinmux(2), 4, 5 },
{ pinmux(2), 4, 4 },
{ pinmux(2), 4, 3 },
{ pinmux(2), 4, 2 },
{ pinmux(2), 4, 1 },
{ pinmux(2), 8, 0 },
{ pinmux(6), 8, 7 }, /* GP2[0] */
{ pinmux(6), 8, 6 },
{ pinmux(6), 8, 5 },
{ pinmux(6), 8, 4 },
{ pinmux(6), 8, 3 },
{ pinmux(6), 8, 2 },
{ pinmux(6), 8, 1 },
{ pinmux(6), 8, 0 },
{ pinmux(5), 8, 7 },
{ pinmux(5), 8, 6 },
{ pinmux(5), 8, 5 },
{ pinmux(5), 8, 4 },
{ pinmux(5), 8, 3 },
{ pinmux(5), 8, 2 },
{ pinmux(5), 8, 1 },
{ pinmux(5), 8, 0 },
{ pinmux(8), 8, 7 }, /* GP3[0] */
{ pinmux(8), 8, 6 },
{ pinmux(8), 8, 5 },
{ pinmux(8), 8, 4 },
{ pinmux(8), 8, 3 },
{ pinmux(8), 8, 2 },
{ pinmux(8), 8, 1 },
{ pinmux(8), 8, 0 },
{ pinmux(7), 8, 7 },
{ pinmux(7), 8, 6 },
{ pinmux(7), 8, 5 },
{ pinmux(7), 8, 4 },
{ pinmux(7), 8, 3 },
{ pinmux(7), 8, 2 },
{ pinmux(7), 8, 1 },
{ pinmux(7), 8, 0 },
{ pinmux(10), 8, 7 }, /* GP4[0] */
{ pinmux(10), 8, 6 },
{ pinmux(10), 8, 5 },
{ pinmux(10), 8, 4 },
{ pinmux(10), 8, 3 },
{ pinmux(10), 8, 2 },
{ pinmux(10), 8, 1 },
{ pinmux(10), 8, 0 },
{ pinmux(9), 8, 7 },
{ pinmux(9), 8, 6 },
{ pinmux(9), 8, 5 },
{ pinmux(9), 8, 4 },
{ pinmux(9), 8, 3 },
{ pinmux(9), 8, 2 },
{ pinmux(9), 8, 1 },
{ pinmux(9), 8, 0 },
{ pinmux(12), 8, 7 }, /* GP5[0] */
{ pinmux(12), 8, 6 },
{ pinmux(12), 8, 5 },
{ pinmux(12), 8, 4 },
{ pinmux(12), 8, 3 },
{ pinmux(12), 8, 2 },
{ pinmux(12), 8, 1 },
{ pinmux(12), 8, 0 },
{ pinmux(11), 8, 7 },
{ pinmux(11), 8, 6 },
{ pinmux(11), 8, 5 },
{ pinmux(11), 8, 4 },
{ pinmux(11), 8, 3 },
{ pinmux(11), 8, 2 },
{ pinmux(11), 8, 1 },
{ pinmux(11), 8, 0 },
{ pinmux(19), 8, 6 }, /* GP6[0] */
{ pinmux(19), 8, 5 },
{ pinmux(19), 8, 4 },
{ pinmux(19), 8, 3 },
{ pinmux(19), 8, 2 },
{ pinmux(16), 8, 1 },
{ pinmux(14), 8, 1 },
{ pinmux(14), 8, 0 },
{ pinmux(13), 8, 7 },
{ pinmux(13), 8, 6 },
{ pinmux(13), 8, 5 },
{ pinmux(13), 8, 4 },
{ pinmux(13), 8, 3 },
{ pinmux(13), 8, 2 },
{ pinmux(13), 8, 1 },
{ pinmux(13), 8, 0 },
{ pinmux(18), 8, 1 }, /* GP7[0] */
{ pinmux(18), 8, 0 },
{ pinmux(17), 8, 7 },
{ pinmux(17), 8, 6 },
{ pinmux(17), 8, 5 },
{ pinmux(17), 8, 4 },
{ pinmux(17), 8, 3 },
{ pinmux(17), 8, 2 },
{ pinmux(17), 8, 1 },
{ pinmux(17), 8, 0 },
{ pinmux(16), 8, 7 },
{ pinmux(16), 8, 6 },
{ pinmux(16), 8, 5 },
{ pinmux(16), 8, 4 },
{ pinmux(16), 8, 3 },
{ pinmux(16), 8, 2 },
{ pinmux(19), 8, 0 }, /* GP8[0] */
{ pinmux(3), 4, 7 },
{ pinmux(3), 4, 6 },
{ pinmux(3), 4, 5 },
{ pinmux(3), 4, 4 },
{ pinmux(3), 4, 3 },
{ pinmux(3), 4, 2 },
{ pinmux(2), 4, 7 },
{ pinmux(19), 8, 1 },
{ pinmux(19), 8, 0 },
{ pinmux(18), 8, 7 },
{ pinmux(18), 8, 6 },
{ pinmux(18), 8, 5 },
{ pinmux(18), 8, 4 },
{ pinmux(18), 8, 3 },
{ pinmux(18), 8, 2 },
};
int gpio_request(unsigned gpio, const char *label)
{
if (gpio >= MAX_NUM_GPIOS)
return -1;
if (gpio_registry[gpio].is_registered)
return -1;
gpio_registry[gpio].is_registered = 1;
strncpy(gpio_registry[gpio].name, label, GPIO_NAME_SIZE);
gpio_registry[gpio].name[GPIO_NAME_SIZE - 1] = 0;
davinci_configure_pin_mux(&gpio_pinmux[gpio], 1);
return 0;
}
int gpio_free(unsigned gpio)
{
if (gpio >= MAX_NUM_GPIOS)
return -1;
if (!gpio_registry[gpio].is_registered)
return -1;
gpio_registry[gpio].is_registered = 0;
gpio_registry[gpio].name[0] = '\0';
/* Do not configure as input or change pin mux here */
return 0;
}
int gpio_direction_input(unsigned gpio)
{
struct davinci_gpio *bank;
bank = GPIO_BANK(gpio);
setbits_le32(&bank->dir, 1U << GPIO_BIT(gpio));
return 0;
}
int gpio_direction_output(unsigned gpio, int value)
{
struct davinci_gpio *bank;
bank = GPIO_BANK(gpio);
clrbits_le32(&bank->dir, 1U << GPIO_BIT(gpio));
gpio_set_value(gpio, value);
return 0;
}
int gpio_get_value(unsigned gpio)
{
struct davinci_gpio *bank;
unsigned int ip;
bank = GPIO_BANK(gpio);
ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gpio));
return ip ? 1 : 0;
}
int gpio_set_value(unsigned gpio, int value)
{
struct davinci_gpio *bank;
bank = GPIO_BANK(gpio);
if (value)
bank->set_data = 1U << GPIO_BIT(gpio);
else
bank->clr_data = 1U << GPIO_BIT(gpio);
return 0;
}
void gpio_info(void)
{
unsigned gpio, dir, val;
struct davinci_gpio *bank;
for (gpio = 0; gpio < MAX_NUM_GPIOS; ++gpio) {
bank = GPIO_BANK(gpio);
dir = in_le32(&bank->dir) & (1U << GPIO_BIT(gpio));
val = gpio_get_value(gpio);
printf("% 4d: %s: %d [%c] %s\n",
gpio, dir ? " in" : "out", val,
gpio_registry[gpio].is_registered ? 'x' : ' ',
gpio_registry[gpio].name);
}
}
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