116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/*
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* (C) Copyright 2011
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* eInfochips Ltd. <www.einfochips.com>
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* Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
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*
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* (C) Copyright 2010
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* Marvell Semiconductor <www.marvell.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/errno.h>
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#include "mvgpio.h"
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#include <asm/gpio.h>
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#ifndef MV_MAX_GPIO
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#define MV_MAX_GPIO 128
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#endif
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int gpio_request(int gp, const char *label)
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{
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if (gp >= MV_MAX_GPIO) {
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printf("%s: Invalid GPIO requested %d\n", __func__, gp);
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return -EINVAL;
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}
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return 0;
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}
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void gpio_free(int gp)
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{
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}
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void gpio_toggle_value(int gp)
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{
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gpio_set_value(gp, !gpio_get_value(gp));
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}
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int gpio_direction_input(int gp)
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{
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struct gpio_reg *gpio_reg_bank;
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if (gp >= MV_MAX_GPIO) {
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printf("%s: Invalid GPIO %d\n", __func__, gp);
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return -EINVAL;
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}
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gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
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writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gcdr);
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return 0;
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}
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int gpio_direction_output(int gp, int value)
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{
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struct gpio_reg *gpio_reg_bank;
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if (gp >= MV_MAX_GPIO) {
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printf("%s: Invalid GPIO %d\n", __func__, gp);
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return -EINVAL;
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}
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gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
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writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gsdr);
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gpio_set_value(gp, value);
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return 0;
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}
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int gpio_get_value(int gp)
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{
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struct gpio_reg *gpio_reg_bank;
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u32 gp_val;
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if (gp >= MV_MAX_GPIO) {
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printf("%s: Invalid GPIO %d\n", __func__, gp);
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return -EINVAL;
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}
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gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
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gp_val = readl(&gpio_reg_bank->gplr);
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return GPIO_VAL(gp, gp_val);
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}
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void gpio_set_value(int gp, int value)
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{
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struct gpio_reg *gpio_reg_bank;
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if (gp >= MV_MAX_GPIO) {
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printf("%s: Invalid GPIO %d\n", __func__, gp);
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return;
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}
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gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
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if (value)
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writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpsr);
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else
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writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpcr);
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}
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