2 * Freescale i.MX28 GPIO control code
4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
5 * on behalf of DENX Software Engineering GmbH
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/errno.h>
15 #include <asm/arch/iomux.h>
16 #include <asm/arch/imx-regs.h>
18 #if defined(CONFIG_SOC_MX23)
19 #define PINCTRL_BANKS 3
20 #define PINCTRL_DOUT(n) (0x0500 + ((n) * 0x10))
21 #define PINCTRL_DIN(n) (0x0600 + ((n) * 0x10))
22 #define PINCTRL_DOE(n) (0x0700 + ((n) * 0x10))
23 #define PINCTRL_PIN2IRQ(n) (0x0800 + ((n) * 0x10))
24 #define PINCTRL_IRQEN(n) (0x0900 + ((n) * 0x10))
25 #define PINCTRL_IRQSTAT(n) (0x0c00 + ((n) * 0x10))
26 #elif defined(CONFIG_SOC_MX28)
27 #define PINCTRL_BANKS 5
28 #define PINCTRL_DOUT(n) (0x0700 + ((n) * 0x10))
29 #define PINCTRL_DIN(n) (0x0900 + ((n) * 0x10))
30 #define PINCTRL_DOE(n) (0x0b00 + ((n) * 0x10))
31 #define PINCTRL_PIN2IRQ(n) (0x1000 + ((n) * 0x10))
32 #define PINCTRL_IRQEN(n) (0x1100 + ((n) * 0x10))
33 #define PINCTRL_IRQSTAT(n) (0x1400 + ((n) * 0x10))
35 #error "Please select CONFIG_SOC_MX23 or CONFIG_SOC_MX28"
38 void mxs_gpio_init(void)
42 for (i = 0; i < PINCTRL_BANKS; i++) {
43 writel(0, MXS_PINCTRL_BASE + PINCTRL_PIN2IRQ(i));
44 writel(0, MXS_PINCTRL_BASE + PINCTRL_IRQEN(i));
45 /* Use SCT address here to clear the IRQSTAT bits */
46 writel(0xffffffff, MXS_PINCTRL_BASE + PINCTRL_IRQSTAT(i) + 8);
50 int gpio_get_value(unsigned gpio)
52 uint32_t bank = MXS_GPIO_TO_BANK(gpio);
53 uint32_t offset = PINCTRL_DIN(bank);
54 struct mxs_register_32 *reg = (void *)(MXS_PINCTRL_BASE + offset);
56 if (bank >= PINCTRL_BANKS)
59 return (readl(®->reg) >> MXS_GPIO_TO_PIN(gpio)) & 1;
62 int gpio_set_value(unsigned gpio, int value)
64 uint32_t bank = MXS_GPIO_TO_BANK(gpio);
65 uint32_t offset = PINCTRL_DOUT(bank);
66 struct mxs_register_32 *reg = (void *)(MXS_PINCTRL_BASE + offset);
68 if (bank >= PINCTRL_BANKS)
72 writel(1 << MXS_GPIO_TO_PIN(gpio), ®->reg_set);
74 writel(1 << MXS_GPIO_TO_PIN(gpio), ®->reg_clr);
79 int gpio_direction_input(unsigned gpio)
81 uint32_t bank = MXS_GPIO_TO_BANK(gpio);
82 uint32_t offset = PINCTRL_DOE(bank);
83 struct mxs_register_32 *reg = (void *)(MXS_PINCTRL_BASE + offset);
85 if (bank >= PINCTRL_BANKS)
88 writel(1 << MXS_GPIO_TO_PIN(gpio), ®->reg_clr);
93 int gpio_direction_output(unsigned gpio, int value)
95 uint32_t bank = MXS_GPIO_TO_BANK(gpio);
96 uint32_t offset = PINCTRL_DOE(bank);
97 struct mxs_register_32 *reg = (void *)(MXS_PINCTRL_BASE + offset);
99 if (bank >= PINCTRL_BANKS)
102 gpio_set_value(gpio, value);
104 writel(1 << MXS_GPIO_TO_PIN(gpio), ®->reg_set);
109 int gpio_request(unsigned gpio, const char *label)
111 if (MXS_GPIO_TO_BANK(gpio) >= PINCTRL_BANKS) {
112 printf("%s(): Invalid GPIO%d (GPIO_%u_%u) requested; possibly intended: GPIO_%u_%u\n",
113 __func__, gpio, gpio / 32, gpio % 32,
114 PAD_BANK(gpio), PAD_PIN(gpio));
115 printf("Linear GPIO number required rather than iomux_cfg_t cookie!\n");
116 printf("Possibly missing MXS_PAD_TO_GPIO() in the GPIO specification.\n");
123 int gpio_free(unsigned gpio)