diff options
Diffstat (limited to 'arch/arm/mach-davinci/gpio-tnetv107x.c')
| -rw-r--r-- | arch/arm/mach-davinci/gpio-tnetv107x.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/arch/arm/mach-davinci/gpio-tnetv107x.c b/arch/arm/mach-davinci/gpio-tnetv107x.c deleted file mode 100644 index 3fa3e28..0000000 --- a/arch/arm/mach-davinci/gpio-tnetv107x.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Texas Instruments TNETV107X GPIO Controller - * - * Copyright (C) 2010 Texas Instruments - * - * 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 version 2. - * - * This program is distributed "as is" WITHOUT ANY WARRANTY of any - * kind, whether express or implied; 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/gpio.h> - -#include <mach/common.h> -#include <mach/tnetv107x.h> - -struct tnetv107x_gpio_regs { - u32 idver; - u32 data_in[3]; - u32 data_out[3]; - u32 direction[3]; - u32 enable[3]; -}; - -#define gpio_reg_index(gpio) ((gpio) >> 5) -#define gpio_reg_bit(gpio) BIT((gpio) & 0x1f) - -#define gpio_reg_rmw(reg, mask, val) \ - __raw_writel((__raw_readl(reg) & ~(mask)) | (val), (reg)) - -#define gpio_reg_set_bit(reg, gpio) \ - gpio_reg_rmw((reg) + gpio_reg_index(gpio), 0, gpio_reg_bit(gpio)) - -#define gpio_reg_clear_bit(reg, gpio) \ - gpio_reg_rmw((reg) + gpio_reg_index(gpio), gpio_reg_bit(gpio), 0) - -#define gpio_reg_get_bit(reg, gpio) \ - (__raw_readl((reg) + gpio_reg_index(gpio)) & gpio_reg_bit(gpio)) - -#define chip2controller(chip) \ - container_of(chip, struct davinci_gpio_controller, chip) - -#define TNETV107X_GPIO_CTLRS DIV_ROUND_UP(TNETV107X_N_GPIO, 32) - -static struct davinci_gpio_controller chips[TNETV107X_GPIO_CTLRS]; - -static int tnetv107x_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - struct davinci_gpio_controller *ctlr = chip2controller(chip); - struct tnetv107x_gpio_regs __iomem *regs = ctlr->regs; - unsigned gpio = chip->base + offset; - unsigned long flags; - - spin_lock_irqsave(&ctlr->lock, flags); - - gpio_reg_set_bit(regs->enable, gpio); - - spin_unlock_irqrestore(&ctlr->lock, flags); - - return 0; -} - -static void tnetv107x_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - struct davinci_gpio_controller *ctlr = chip2controller(chip); - struct tnetv107x_gpio_regs __iomem *regs = ctlr->regs; - unsigned gpio = chip->base + offset; - unsigned long flags; - - spin_lock_irqsave(&ctlr->lock, flags); - - gpio_reg_clear_bit(regs->enable, gpio); - - spin_unlock_irqrestore(&ctlr->lock, flags); -} - -static int tnetv107x_gpio_dir_in(struct gpio_chip *chip, unsigned offset) -{ - struct davinci_gpio_controller *ctlr = chip2controller(chip); - struct tnetv107x_gpio_regs __iomem *regs = ctlr->regs; - unsigned gpio = chip->base + offset; - unsigned long flags; - - spin_lock_irqsave(&ctlr->lock, flags); - - gpio_reg_set_bit(regs->direction, gpio); - - spin_unlock_irqrestore(&ctlr->lock, flags); - - return 0; -} - -static int tnetv107x_gpio_dir_out(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct davinci_gpio_controller *ctlr = chip2controller(chip); - struct tnetv107x_gpio_regs __iomem *regs = ctlr->regs; - unsigned gpio = chip->base + offset; - unsigned long flags; - - spin_lock_irqsave(&ctlr->lock, flags); - - if (value) - gpio_reg_set_bit(regs->data_out, gpio); - else - gpio_reg_clear_bit(regs->data_out, gpio); - - gpio_reg_clear_bit(regs->direction, gpio); - - spin_unlock_irqrestore(&ctlr->lock, flags); - - return 0; -} - -static int tnetv107x_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct davinci_gpio_controller *ctlr = chip2controller(chip); - struct tnetv107x_gpio_regs __iomem *regs = ctlr->regs; - unsigned gpio = chip->base + offset; - int ret; - - ret = gpio_reg_get_bit(regs->data_in, gpio); - - return ret ? 1 : 0; -} - -static void tnetv107x_gpio_set(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct davinci_gpio_controller *ctlr = chip2controller(chip); - struct tnetv107x_gpio_regs __iomem *regs = ctlr->regs; - unsigned gpio = chip->base + offset; - unsigned long flags; - - spin_lock_irqsave(&ctlr->lock, flags); - - if (value) - gpio_reg_set_bit(regs->data_out, gpio); - else - gpio_reg_clear_bit(regs->data_out, gpio); - - spin_unlock_irqrestore(&ctlr->lock, flags); -} - -static int __init tnetv107x_gpio_setup(void) -{ - int i, base; - unsigned ngpio; - struct davinci_soc_info *soc_info = &davinci_soc_info; - struct tnetv107x_gpio_regs *regs; - struct davinci_gpio_controller *ctlr; - - if (soc_info->gpio_type != GPIO_TYPE_TNETV107X) - return 0; - - ngpio = soc_info->gpio_num; - if (ngpio == 0) { - pr_err("GPIO setup: how many GPIOs?\n"); - return -EINVAL; - } - - if (WARN_ON(TNETV107X_N_GPIO < ngpio)) - ngpio = TNETV107X_N_GPIO; - - regs = ioremap(soc_info->gpio_base, SZ_4K); - if (WARN_ON(!regs)) - return -EINVAL; - - for (i = 0, base = 0; base < ngpio; i++, base += 32) { - ctlr = &chips[i]; - - ctlr->chip.label = "tnetv107x"; - ctlr->chip.can_sleep = 0; - ctlr->chip.base = base; - ctlr->chip.ngpio = ngpio - base; - if (ctlr->chip.ngpio > 32) - ctlr->chip.ngpio = 32; - - ctlr->chip.request = tnetv107x_gpio_request; - ctlr->chip.free = tnetv107x_gpio_free; - ctlr->chip.direction_input = tnetv107x_gpio_dir_in; - ctlr->chip.get = tnetv107x_gpio_get; - ctlr->chip.direction_output = tnetv107x_gpio_dir_out; - ctlr->chip.set = tnetv107x_gpio_set; - - spin_lock_init(&ctlr->lock); - - ctlr->regs = regs; - ctlr->set_data = ®s->data_out[i]; - ctlr->clr_data = ®s->data_out[i]; - ctlr->in_data = ®s->data_in[i]; - - gpiochip_add(&ctlr->chip); - } - - soc_info->gpio_ctlrs = chips; - soc_info->gpio_ctlrs_num = DIV_ROUND_UP(ngpio, 32); - return 0; -} -pure_initcall(tnetv107x_gpio_setup); |