| /* |
| * arch/arm/mach-lpc32xx/gpiolib.c |
| * |
| * Author: Kevin Wells <kevin.wells@nxp.com> |
| * |
| * Copyright (C) 2010 NXP Semiconductors |
| * |
| * 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. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <linux/errno.h> |
| #include <linux/gpio.h> |
| |
| #include <mach/hardware.h> |
| #include <mach/platform.h> |
| #include <mach/gpio-lpc32xx.h> |
| |
| #define LPC32XX_GPIO_P3_INP_STATE _GPREG(0x000) |
| #define LPC32XX_GPIO_P3_OUTP_SET _GPREG(0x004) |
| #define LPC32XX_GPIO_P3_OUTP_CLR _GPREG(0x008) |
| #define LPC32XX_GPIO_P3_OUTP_STATE _GPREG(0x00C) |
| #define LPC32XX_GPIO_P2_DIR_SET _GPREG(0x010) |
| #define LPC32XX_GPIO_P2_DIR_CLR _GPREG(0x014) |
| #define LPC32XX_GPIO_P2_DIR_STATE _GPREG(0x018) |
| #define LPC32XX_GPIO_P2_INP_STATE _GPREG(0x01C) |
| #define LPC32XX_GPIO_P2_OUTP_SET _GPREG(0x020) |
| #define LPC32XX_GPIO_P2_OUTP_CLR _GPREG(0x024) |
| #define LPC32XX_GPIO_P2_MUX_SET _GPREG(0x028) |
| #define LPC32XX_GPIO_P2_MUX_CLR _GPREG(0x02C) |
| #define LPC32XX_GPIO_P2_MUX_STATE _GPREG(0x030) |
| #define LPC32XX_GPIO_P0_INP_STATE _GPREG(0x040) |
| #define LPC32XX_GPIO_P0_OUTP_SET _GPREG(0x044) |
| #define LPC32XX_GPIO_P0_OUTP_CLR _GPREG(0x048) |
| #define LPC32XX_GPIO_P0_OUTP_STATE _GPREG(0x04C) |
| #define LPC32XX_GPIO_P0_DIR_SET _GPREG(0x050) |
| #define LPC32XX_GPIO_P0_DIR_CLR _GPREG(0x054) |
| #define LPC32XX_GPIO_P0_DIR_STATE _GPREG(0x058) |
| #define LPC32XX_GPIO_P1_INP_STATE _GPREG(0x060) |
| #define LPC32XX_GPIO_P1_OUTP_SET _GPREG(0x064) |
| #define LPC32XX_GPIO_P1_OUTP_CLR _GPREG(0x068) |
| #define LPC32XX_GPIO_P1_OUTP_STATE _GPREG(0x06C) |
| #define LPC32XX_GPIO_P1_DIR_SET _GPREG(0x070) |
| #define LPC32XX_GPIO_P1_DIR_CLR _GPREG(0x074) |
| #define LPC32XX_GPIO_P1_DIR_STATE _GPREG(0x078) |
| |
| #define GPIO012_PIN_TO_BIT(x) (1 << (x)) |
| #define GPIO3_PIN_TO_BIT(x) (1 << ((x) + 25)) |
| #define GPO3_PIN_TO_BIT(x) (1 << (x)) |
| #define GPIO012_PIN_IN_SEL(x, y) (((x) >> (y)) & 1) |
| #define GPIO3_PIN_IN_SHIFT(x) ((x) == 5 ? 24 : 10 + (x)) |
| #define GPIO3_PIN_IN_SEL(x, y) ((x) >> GPIO3_PIN_IN_SHIFT(y)) |
| #define GPIO3_PIN5_IN_SEL(x) (((x) >> 24) & 1) |
| #define GPI3_PIN_IN_SEL(x, y) (((x) >> (y)) & 1) |
| |
| struct gpio_regs { |
| void __iomem *inp_state; |
| void __iomem *outp_set; |
| void __iomem *outp_clr; |
| void __iomem *dir_set; |
| void __iomem *dir_clr; |
| }; |
| |
| /* |
| * GPIO names |
| */ |
| static const char *gpio_p0_names[LPC32XX_GPIO_P0_MAX] = { |
| "p0.0", "p0.1", "p0.2", "p0.3", |
| "p0.4", "p0.5", "p0.6", "p0.7" |
| }; |
| |
| static const char *gpio_p1_names[LPC32XX_GPIO_P1_MAX] = { |
| "p1.0", "p1.1", "p1.2", "p1.3", |
| "p1.4", "p1.5", "p1.6", "p1.7", |
| "p1.8", "p1.9", "p1.10", "p1.11", |
| "p1.12", "p1.13", "p1.14", "p1.15", |
| "p1.16", "p1.17", "p1.18", "p1.19", |
| "p1.20", "p1.21", "p1.22", "p1.23", |
| }; |
| |
| static const char *gpio_p2_names[LPC32XX_GPIO_P2_MAX] = { |
| "p2.0", "p2.1", "p2.2", "p2.3", |
| "p2.4", "p2.5", "p2.6", "p2.7", |
| "p2.8", "p2.9", "p2.10", "p2.11", |
| "p2.12" |
| }; |
| |
| static const char *gpio_p3_names[LPC32XX_GPIO_P3_MAX] = { |
| "gpi000", "gpio01", "gpio02", "gpio03", |
| "gpio04", "gpio05" |
| }; |
| |
| static const char *gpi_p3_names[LPC32XX_GPI_P3_MAX] = { |
| "gpi00", "gpi01", "gpi02", "gpi03", |
| "gpi04", "gpi05", "gpi06", "gpi07", |
| "gpi08", "gpi09", NULL, NULL, |
| NULL, NULL, NULL, "gpi15", |
| "gpi16", "gpi17", "gpi18", "gpi19", |
| "gpi20", "gpi21", "gpi22", "gpi23", |
| "gpi24", "gpi25", "gpi26", "gpi27" |
| }; |
| |
| static const char *gpo_p3_names[LPC32XX_GPO_P3_MAX] = { |
| "gpo00", "gpo01", "gpo02", "gpo03", |
| "gpo04", "gpo05", "gpo06", "gpo07", |
| "gpo08", "gpo09", "gpo10", "gpo11", |
| "gpo12", "gpo13", "gpo14", "gpo15", |
| "gpo16", "gpo17", "gpo18", "gpo19", |
| "gpo20", "gpo21", "gpo22", "gpo23" |
| }; |
| |
| static struct gpio_regs gpio_grp_regs_p0 = { |
| .inp_state = LPC32XX_GPIO_P0_INP_STATE, |
| .outp_set = LPC32XX_GPIO_P0_OUTP_SET, |
| .outp_clr = LPC32XX_GPIO_P0_OUTP_CLR, |
| .dir_set = LPC32XX_GPIO_P0_DIR_SET, |
| .dir_clr = LPC32XX_GPIO_P0_DIR_CLR, |
| }; |
| |
| static struct gpio_regs gpio_grp_regs_p1 = { |
| .inp_state = LPC32XX_GPIO_P1_INP_STATE, |
| .outp_set = LPC32XX_GPIO_P1_OUTP_SET, |
| .outp_clr = LPC32XX_GPIO_P1_OUTP_CLR, |
| .dir_set = LPC32XX_GPIO_P1_DIR_SET, |
| .dir_clr = LPC32XX_GPIO_P1_DIR_CLR, |
| }; |
| |
| static struct gpio_regs gpio_grp_regs_p2 = { |
| .inp_state = LPC32XX_GPIO_P2_INP_STATE, |
| .outp_set = LPC32XX_GPIO_P2_OUTP_SET, |
| .outp_clr = LPC32XX_GPIO_P2_OUTP_CLR, |
| .dir_set = LPC32XX_GPIO_P2_DIR_SET, |
| .dir_clr = LPC32XX_GPIO_P2_DIR_CLR, |
| }; |
| |
| static struct gpio_regs gpio_grp_regs_p3 = { |
| .inp_state = LPC32XX_GPIO_P3_INP_STATE, |
| .outp_set = LPC32XX_GPIO_P3_OUTP_SET, |
| .outp_clr = LPC32XX_GPIO_P3_OUTP_CLR, |
| .dir_set = LPC32XX_GPIO_P2_DIR_SET, |
| .dir_clr = LPC32XX_GPIO_P2_DIR_CLR, |
| }; |
| |
| struct lpc32xx_gpio_chip { |
| struct gpio_chip chip; |
| struct gpio_regs *gpio_grp; |
| }; |
| |
| static inline struct lpc32xx_gpio_chip *to_lpc32xx_gpio( |
| struct gpio_chip *gpc) |
| { |
| return container_of(gpc, struct lpc32xx_gpio_chip, chip); |
| } |
| |
| static void __set_gpio_dir_p012(struct lpc32xx_gpio_chip *group, |
| unsigned pin, int input) |
| { |
| if (input) |
| __raw_writel(GPIO012_PIN_TO_BIT(pin), |
| group->gpio_grp->dir_clr); |
| else |
| __raw_writel(GPIO012_PIN_TO_BIT(pin), |
| group->gpio_grp->dir_set); |
| } |
| |
| static void __set_gpio_dir_p3(struct lpc32xx_gpio_chip *group, |
| unsigned pin, int input) |
| { |
| u32 u = GPIO3_PIN_TO_BIT(pin); |
| |
| if (input) |
| __raw_writel(u, group->gpio_grp->dir_clr); |
| else |
| __raw_writel(u, group->gpio_grp->dir_set); |
| } |
| |
| static void __set_gpio_level_p012(struct lpc32xx_gpio_chip *group, |
| unsigned pin, int high) |
| { |
| if (high) |
| __raw_writel(GPIO012_PIN_TO_BIT(pin), |
| group->gpio_grp->outp_set); |
| else |
| __raw_writel(GPIO012_PIN_TO_BIT(pin), |
| group->gpio_grp->outp_clr); |
| } |
| |
| static void __set_gpio_level_p3(struct lpc32xx_gpio_chip *group, |
| unsigned pin, int high) |
| { |
| u32 u = GPIO3_PIN_TO_BIT(pin); |
| |
| if (high) |
| __raw_writel(u, group->gpio_grp->outp_set); |
| else |
| __raw_writel(u, group->gpio_grp->outp_clr); |
| } |
| |
| static void __set_gpo_level_p3(struct lpc32xx_gpio_chip *group, |
| unsigned pin, int high) |
| { |
| if (high) |
| __raw_writel(GPO3_PIN_TO_BIT(pin), group->gpio_grp->outp_set); |
| else |
| __raw_writel(GPO3_PIN_TO_BIT(pin), group->gpio_grp->outp_clr); |
| } |
| |
| static int __get_gpio_state_p012(struct lpc32xx_gpio_chip *group, |
| unsigned pin) |
| { |
| return GPIO012_PIN_IN_SEL(__raw_readl(group->gpio_grp->inp_state), |
| pin); |
| } |
| |
| static int __get_gpio_state_p3(struct lpc32xx_gpio_chip *group, |
| unsigned pin) |
| { |
| int state = __raw_readl(group->gpio_grp->inp_state); |
| |
| /* |
| * P3 GPIO pin input mapping is not contiguous, GPIOP3-0..4 is mapped |
| * to bits 10..14, while GPIOP3-5 is mapped to bit 24. |
| */ |
| return GPIO3_PIN_IN_SEL(state, pin); |
| } |
| |
| static int __get_gpi_state_p3(struct lpc32xx_gpio_chip *group, |
| unsigned pin) |
| { |
| return GPI3_PIN_IN_SEL(__raw_readl(group->gpio_grp->inp_state), pin); |
| } |
| |
| /* |
| * GENERIC_GPIO primitives. |
| */ |
| static int lpc32xx_gpio_dir_input_p012(struct gpio_chip *chip, |
| unsigned pin) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpio_dir_p012(group, pin, 1); |
| |
| return 0; |
| } |
| |
| static int lpc32xx_gpio_dir_input_p3(struct gpio_chip *chip, |
| unsigned pin) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpio_dir_p3(group, pin, 1); |
| |
| return 0; |
| } |
| |
| static int lpc32xx_gpio_dir_in_always(struct gpio_chip *chip, |
| unsigned pin) |
| { |
| return 0; |
| } |
| |
| static int lpc32xx_gpio_get_value_p012(struct gpio_chip *chip, unsigned pin) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| return __get_gpio_state_p012(group, pin); |
| } |
| |
| static int lpc32xx_gpio_get_value_p3(struct gpio_chip *chip, unsigned pin) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| return __get_gpio_state_p3(group, pin); |
| } |
| |
| static int lpc32xx_gpi_get_value(struct gpio_chip *chip, unsigned pin) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| return __get_gpi_state_p3(group, pin); |
| } |
| |
| static int lpc32xx_gpio_dir_output_p012(struct gpio_chip *chip, unsigned pin, |
| int value) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpio_dir_p012(group, pin, 0); |
| |
| return 0; |
| } |
| |
| static int lpc32xx_gpio_dir_output_p3(struct gpio_chip *chip, unsigned pin, |
| int value) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpio_dir_p3(group, pin, 0); |
| |
| return 0; |
| } |
| |
| static int lpc32xx_gpio_dir_out_always(struct gpio_chip *chip, unsigned pin, |
| int value) |
| { |
| return 0; |
| } |
| |
| static void lpc32xx_gpio_set_value_p012(struct gpio_chip *chip, unsigned pin, |
| int value) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpio_level_p012(group, pin, value); |
| } |
| |
| static void lpc32xx_gpio_set_value_p3(struct gpio_chip *chip, unsigned pin, |
| int value) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpio_level_p3(group, pin, value); |
| } |
| |
| static void lpc32xx_gpo_set_value(struct gpio_chip *chip, unsigned pin, |
| int value) |
| { |
| struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip); |
| |
| __set_gpo_level_p3(group, pin, value); |
| } |
| |
| static int lpc32xx_gpio_request(struct gpio_chip *chip, unsigned pin) |
| { |
| if (pin < chip->ngpio) |
| return 0; |
| |
| return -EINVAL; |
| } |
| |
| static struct lpc32xx_gpio_chip lpc32xx_gpiochip[] = { |
| { |
| .chip = { |
| .label = "gpio_p0", |
| .direction_input = lpc32xx_gpio_dir_input_p012, |
| .get = lpc32xx_gpio_get_value_p012, |
| .direction_output = lpc32xx_gpio_dir_output_p012, |
| .set = lpc32xx_gpio_set_value_p012, |
| .request = lpc32xx_gpio_request, |
| .base = LPC32XX_GPIO_P0_GRP, |
| .ngpio = LPC32XX_GPIO_P0_MAX, |
| .names = gpio_p0_names, |
| .can_sleep = 0, |
| }, |
| .gpio_grp = &gpio_grp_regs_p0, |
| }, |
| { |
| .chip = { |
| .label = "gpio_p1", |
| .direction_input = lpc32xx_gpio_dir_input_p012, |
| .get = lpc32xx_gpio_get_value_p012, |
| .direction_output = lpc32xx_gpio_dir_output_p012, |
| .set = lpc32xx_gpio_set_value_p012, |
| .request = lpc32xx_gpio_request, |
| .base = LPC32XX_GPIO_P1_GRP, |
| .ngpio = LPC32XX_GPIO_P1_MAX, |
| .names = gpio_p1_names, |
| .can_sleep = 0, |
| }, |
| .gpio_grp = &gpio_grp_regs_p1, |
| }, |
| { |
| .chip = { |
| .label = "gpio_p2", |
| .direction_input = lpc32xx_gpio_dir_input_p012, |
| .get = lpc32xx_gpio_get_value_p012, |
| .direction_output = lpc32xx_gpio_dir_output_p012, |
| .set = lpc32xx_gpio_set_value_p012, |
| .request = lpc32xx_gpio_request, |
| .base = LPC32XX_GPIO_P2_GRP, |
| .ngpio = LPC32XX_GPIO_P2_MAX, |
| .names = gpio_p2_names, |
| .can_sleep = 0, |
| }, |
| .gpio_grp = &gpio_grp_regs_p2, |
| }, |
| { |
| .chip = { |
| .label = "gpio_p3", |
| .direction_input = lpc32xx_gpio_dir_input_p3, |
| .get = lpc32xx_gpio_get_value_p3, |
| .direction_output = lpc32xx_gpio_dir_output_p3, |
| .set = lpc32xx_gpio_set_value_p3, |
| .request = lpc32xx_gpio_request, |
| .base = LPC32XX_GPIO_P3_GRP, |
| .ngpio = LPC32XX_GPIO_P3_MAX, |
| .names = gpio_p3_names, |
| .can_sleep = 0, |
| }, |
| .gpio_grp = &gpio_grp_regs_p3, |
| }, |
| { |
| .chip = { |
| .label = "gpi_p3", |
| .direction_input = lpc32xx_gpio_dir_in_always, |
| .get = lpc32xx_gpi_get_value, |
| .request = lpc32xx_gpio_request, |
| .base = LPC32XX_GPI_P3_GRP, |
| .ngpio = LPC32XX_GPI_P3_MAX, |
| .names = gpi_p3_names, |
| .can_sleep = 0, |
| }, |
| .gpio_grp = &gpio_grp_regs_p3, |
| }, |
| { |
| .chip = { |
| .label = "gpo_p3", |
| .direction_output = lpc32xx_gpio_dir_out_always, |
| .set = lpc32xx_gpo_set_value, |
| .request = lpc32xx_gpio_request, |
| .base = LPC32XX_GPO_P3_GRP, |
| .ngpio = LPC32XX_GPO_P3_MAX, |
| .names = gpo_p3_names, |
| .can_sleep = 0, |
| }, |
| .gpio_grp = &gpio_grp_regs_p3, |
| }, |
| }; |
| |
| void __init lpc32xx_gpio_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++) |
| gpiochip_add(&lpc32xx_gpiochip[i].chip); |
| } |
