1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * (C) Copyright 2011
3*4882a593Smuzhiyun * eInfochips Ltd. <www.einfochips.com>
4*4882a593Smuzhiyun * Written-by: Ajay Bhargav <contact@8051projects.net>
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * (C) Copyright 2010
7*4882a593Smuzhiyun * Marvell Semiconductor <www.marvell.com>
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <common.h>
13*4882a593Smuzhiyun #include <asm/io.h>
14*4882a593Smuzhiyun #include <linux/errno.h>
15*4882a593Smuzhiyun #include "mvgpio.h"
16*4882a593Smuzhiyun #include <asm/gpio.h>
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #ifndef MV_MAX_GPIO
19*4882a593Smuzhiyun #define MV_MAX_GPIO 128
20*4882a593Smuzhiyun #endif
21*4882a593Smuzhiyun
gpio_request(unsigned gpio,const char * label)22*4882a593Smuzhiyun int gpio_request(unsigned gpio, const char *label)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun if (gpio >= MV_MAX_GPIO) {
25*4882a593Smuzhiyun printf("%s: Invalid GPIO requested %d\n", __func__, gpio);
26*4882a593Smuzhiyun return -1;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun return 0;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
gpio_free(unsigned gpio)31*4882a593Smuzhiyun int gpio_free(unsigned gpio)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun return 0;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
gpio_direction_input(unsigned gpio)36*4882a593Smuzhiyun int gpio_direction_input(unsigned gpio)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun struct gpio_reg *gpio_reg_bank;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (gpio >= MV_MAX_GPIO) {
41*4882a593Smuzhiyun printf("%s: Invalid GPIO %d\n", __func__, gpio);
42*4882a593Smuzhiyun return -1;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gpio));
46*4882a593Smuzhiyun writel(GPIO_TO_BIT(gpio), &gpio_reg_bank->gcdr);
47*4882a593Smuzhiyun return 0;
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
gpio_direction_output(unsigned gpio,int value)50*4882a593Smuzhiyun int gpio_direction_output(unsigned gpio, int value)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun struct gpio_reg *gpio_reg_bank;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (gpio >= MV_MAX_GPIO) {
55*4882a593Smuzhiyun printf("%s: Invalid GPIO %d\n", __func__, gpio);
56*4882a593Smuzhiyun return -1;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gpio));
60*4882a593Smuzhiyun writel(GPIO_TO_BIT(gpio), &gpio_reg_bank->gsdr);
61*4882a593Smuzhiyun gpio_set_value(gpio, value);
62*4882a593Smuzhiyun return 0;
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
gpio_get_value(unsigned gpio)65*4882a593Smuzhiyun int gpio_get_value(unsigned gpio)
66*4882a593Smuzhiyun {
67*4882a593Smuzhiyun struct gpio_reg *gpio_reg_bank;
68*4882a593Smuzhiyun u32 gpio_val;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun if (gpio >= MV_MAX_GPIO) {
71*4882a593Smuzhiyun printf("%s: Invalid GPIO %d\n", __func__, gpio);
72*4882a593Smuzhiyun return -1;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gpio));
76*4882a593Smuzhiyun gpio_val = readl(&gpio_reg_bank->gplr);
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun return GPIO_VAL(gpio, gpio_val);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
gpio_set_value(unsigned gpio,int value)81*4882a593Smuzhiyun int gpio_set_value(unsigned gpio, int value)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun struct gpio_reg *gpio_reg_bank;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun if (gpio >= MV_MAX_GPIO) {
86*4882a593Smuzhiyun printf("%s: Invalid GPIO %d\n", __func__, gpio);
87*4882a593Smuzhiyun return -1;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun gpio_reg_bank = get_gpio_base(GPIO_TO_REG(gpio));
91*4882a593Smuzhiyun if (value)
92*4882a593Smuzhiyun writel(GPIO_TO_BIT(gpio), &gpio_reg_bank->gpsr);
93*4882a593Smuzhiyun else
94*4882a593Smuzhiyun writel(GPIO_TO_BIT(gpio), &gpio_reg_bank->gpcr);
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun return 0;
97*4882a593Smuzhiyun }
98