3 * eInfochips Ltd. <www.einfochips.com>
4 * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
7 * Marvell Semiconductor <www.marvell.com>
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
30 #include <asm/errno.h>
35 #define MV_MAX_GPIO 128
38 int gpio_request(int gp, const char *label)
40 if (gp >= MV_MAX_GPIO) {
41 printf("%s: Invalid GPIO requested %d\n", __func__, gp);
47 void gpio_free(int gp)
51 void gpio_toggle_value(int gp)
53 gpio_set_value(gp, !gpio_get_value(gp));
56 int gpio_direction_input(int gp)
58 struct gpio_reg *gpio_reg_bank;
60 if (gp >= MV_MAX_GPIO) {
61 printf("%s: Invalid GPIO %d\n", __func__, gp);
65 gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
66 writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gcdr);
70 int gpio_direction_output(int gp, int value)
72 struct gpio_reg *gpio_reg_bank;
74 if (gp >= MV_MAX_GPIO) {
75 printf("%s: Invalid GPIO %d\n", __func__, gp);
79 gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
80 writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gsdr);
81 gpio_set_value(gp, value);
85 int gpio_get_value(int gp)
87 struct gpio_reg *gpio_reg_bank;
90 if (gp >= MV_MAX_GPIO) {
91 printf("%s: Invalid GPIO %d\n", __func__, gp);
95 gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
96 gp_val = readl(&gpio_reg_bank->gplr);
98 return GPIO_VAL(gp, gp_val);
101 void gpio_set_value(int gp, int value)
103 struct gpio_reg *gpio_reg_bank;
105 if (gp >= MV_MAX_GPIO) {
106 printf("%s: Invalid GPIO %d\n", __func__, gp);
110 gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gp));
112 writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpsr);
114 writel(GPIO_TO_BIT(gp), &gpio_reg_bank->gpcr);