diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/gpio.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/gpio.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/arch/arm/mach-ep93xx/gpio.c b/arch/arm/mach-ep93xx/gpio.c deleted file mode 100644 index dc2e4c00d98..00000000000 --- a/arch/arm/mach-ep93xx/gpio.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * linux/arch/arm/mach-ep93xx/gpio.c - * - * Generic EP93xx GPIO handling - * - * Copyright (c) 2008 Ryan Mallon <ryan@bluewatersys.com> - * - * Based on code originally from: - * linux/arch/arm/mach-ep93xx/core.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/seq_file.h> - -#include <asm/arch/ep93xx-regs.h> -#include <asm/io.h> -#include <asm/gpio.h> - -struct ep93xx_gpio_chip { - struct gpio_chip chip; - - unsigned int data_reg; - unsigned int data_dir_reg; -}; - -#define to_ep93xx_gpio_chip(c) container_of(c, struct ep93xx_gpio_chip, chip) - -/* From core.c */ -extern void ep93xx_gpio_int_mask(unsigned line); -extern void ep93xx_gpio_update_int_params(unsigned port); - -static int ep93xx_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - struct ep93xx_gpio_chip *ep93xx_chip = to_ep93xx_gpio_chip(chip); - unsigned long flags; - u8 v; - - local_irq_save(flags); - v = __raw_readb(ep93xx_chip->data_dir_reg); - v &= ~(1 << offset); - __raw_writeb(v, ep93xx_chip->data_dir_reg); - local_irq_restore(flags); - - return 0; -} - -static int ep93xx_gpio_direction_output(struct gpio_chip *chip, - unsigned offset, int val) -{ - struct ep93xx_gpio_chip *ep93xx_chip = to_ep93xx_gpio_chip(chip); - unsigned long flags; - int line; - u8 v; - - local_irq_save(flags); - - /* Set the value */ - v = __raw_readb(ep93xx_chip->data_reg); - if (val) - v |= (1 << offset); - else - v &= ~(1 << offset); - __raw_writeb(v, ep93xx_chip->data_reg); - - /* Drive as an output */ - line = chip->base + offset; - if (line <= EP93XX_GPIO_LINE_MAX_IRQ) { - /* Ports A/B/F */ - ep93xx_gpio_int_mask(line); - ep93xx_gpio_update_int_params(line >> 3); - } - - v = __raw_readb(ep93xx_chip->data_dir_reg); - v |= (1 << offset); - __raw_writeb(v, ep93xx_chip->data_dir_reg); - - local_irq_restore(flags); - - return 0; -} - -static int ep93xx_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct ep93xx_gpio_chip *ep93xx_chip = to_ep93xx_gpio_chip(chip); - - return !!(__raw_readb(ep93xx_chip->data_reg) & (1 << offset)); -} - -static void ep93xx_gpio_set(struct gpio_chip *chip, unsigned offset, int val) -{ - struct ep93xx_gpio_chip *ep93xx_chip = to_ep93xx_gpio_chip(chip); - unsigned long flags; - u8 v; - - local_irq_save(flags); - v = __raw_readb(ep93xx_chip->data_reg); - if (val) - v |= (1 << offset); - else - v &= ~(1 << offset); - __raw_writeb(v, ep93xx_chip->data_reg); - local_irq_restore(flags); -} - -static void ep93xx_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) -{ - struct ep93xx_gpio_chip *ep93xx_chip = to_ep93xx_gpio_chip(chip); - u8 data_reg, data_dir_reg; - int i; - - data_reg = __raw_readb(ep93xx_chip->data_reg); - data_dir_reg = __raw_readb(ep93xx_chip->data_dir_reg); - - for (i = 0; i < chip->ngpio; i++) - seq_printf(s, "GPIO %s%d: %s %s\n", chip->label, i, - (data_reg & (1 << i)) ? "set" : "clear", - (data_dir_reg & (1 << i)) ? "out" : "in"); -} - -#define EP93XX_GPIO_BANK(name, dr, ddr, base_gpio) \ - { \ - .chip = { \ - .label = name, \ - .direction_input = ep93xx_gpio_direction_input, \ - .direction_output = ep93xx_gpio_direction_output, \ - .get = ep93xx_gpio_get, \ - .set = ep93xx_gpio_set, \ - .dbg_show = ep93xx_gpio_dbg_show, \ - .base = base_gpio, \ - .ngpio = 8, \ - }, \ - .data_reg = EP93XX_GPIO_REG(dr), \ - .data_dir_reg = EP93XX_GPIO_REG(ddr), \ - } - -static struct ep93xx_gpio_chip ep93xx_gpio_banks[] = { - EP93XX_GPIO_BANK("A", 0x00, 0x10, 0), - EP93XX_GPIO_BANK("B", 0x04, 0x14, 8), - EP93XX_GPIO_BANK("C", 0x30, 0x34, 40), - EP93XX_GPIO_BANK("D", 0x0c, 0x1c, 24), - EP93XX_GPIO_BANK("E", 0x20, 0x24, 32), - EP93XX_GPIO_BANK("F", 0x08, 0x18, 16), - EP93XX_GPIO_BANK("G", 0x38, 0x3c, 48), - EP93XX_GPIO_BANK("H", 0x40, 0x44, 56), -}; - -void __init ep93xx_gpio_init(void) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) - gpiochip_add(&ep93xx_gpio_banks[i].chip); -} |