diff options
Diffstat (limited to 'target/linux/rdc/files-2.6.32/arch/x86/mach-rdc321x/gpio.c')
| -rw-r--r-- | target/linux/rdc/files-2.6.32/arch/x86/mach-rdc321x/gpio.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/target/linux/rdc/files-2.6.32/arch/x86/mach-rdc321x/gpio.c b/target/linux/rdc/files-2.6.32/arch/x86/mach-rdc321x/gpio.c deleted file mode 100644 index c99b3b223..000000000 --- a/target/linux/rdc/files-2.6.32/arch/x86/mach-rdc321x/gpio.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * GPIO support for RDC SoC R3210/R8610 - * - * Copyright (C) 2007, Florian Fainelli <florian@openwrt.org> - * Copyright (C) 2008, Volker Weiss <dev@tintuc.de> - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - - -#include <linux/spinlock.h> -#include <linux/io.h> -#include <linux/types.h> -#include <linux/module.h> -#include <linux/gpio.h> - -#include <asm/rdc321x_gpio.h> -#include <asm/rdc321x_defs.h> - - -/* spin lock to protect our private copy of GPIO data register plus - the access to PCI conf registers. */ -static DEFINE_SPINLOCK(gpio_lock); - -/* copy of GPIO data registers */ -static u32 gpio_data_reg1; -static u32 gpio_data_reg2; - -static inline void rdc321x_conf_write(unsigned addr, u32 value) -{ - outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR); - outl(value, RDC3210_CFGREG_DATA); -} - -static inline void rdc321x_conf_or(unsigned addr, u32 value) -{ - outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR); - value |= inl(RDC3210_CFGREG_DATA); - outl(value, RDC3210_CFGREG_DATA); -} - -static inline u32 rdc321x_conf_read(unsigned addr) -{ - outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR); - - return inl(RDC3210_CFGREG_DATA); -} - -/* configure pin as GPIO */ -static void rdc321x_configure_gpio(unsigned gpio) -{ - unsigned long flags; - - spin_lock_irqsave(&gpio_lock, flags); - rdc321x_conf_or(gpio < 32 - ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2, - 1 << (gpio & 0x1f)); - spin_unlock_irqrestore(&gpio_lock, flags); -} - -/* read GPIO pin */ -static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio) -{ - u32 reg; - unsigned long flags; - - spin_lock_irqsave(&gpio_lock, flags); - reg = rdc321x_conf_read(gpio < 32 - ? RDC321X_GPIO_DATA_REG1 : RDC321X_GPIO_DATA_REG2); - spin_unlock_irqrestore(&gpio_lock, flags); - - return (1 << (gpio & 0x1f)) & reg ? 1 : 0; -} - -/* set GPIO pin to value */ -static void rdc_gpio_set_value(struct gpio_chip *chip, - unsigned gpio, int value) -{ - unsigned long flags; - u32 reg; - - reg = 1 << (gpio & 0x1f); - if (gpio < 32) { - spin_lock_irqsave(&gpio_lock, flags); - if (value) - gpio_data_reg1 |= reg; - else - gpio_data_reg1 &= ~reg; - rdc321x_conf_write(RDC321X_GPIO_DATA_REG1, gpio_data_reg1); - spin_unlock_irqrestore(&gpio_lock, flags); - } else { - spin_lock_irqsave(&gpio_lock, flags); - if (value) - gpio_data_reg2 |= reg; - else - gpio_data_reg2 &= ~reg; - rdc321x_conf_write(RDC321X_GPIO_DATA_REG2, gpio_data_reg2); - spin_unlock_irqrestore(&gpio_lock, flags); - } -} - -/* configure GPIO pin as input */ -static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) -{ - rdc321x_configure_gpio(gpio); - - return 0; -} - -/* configure GPIO pin as output and set value */ -static int rdc_gpio_direction_output(struct gpio_chip *chip, - unsigned gpio, int value) -{ - rdc321x_configure_gpio(gpio); - gpio_set_value(gpio, value); - - return 0; -} - -static struct gpio_chip rdc321x_gpio_chip = { - .label = "rdc321x-gpio", - .direction_input = rdc_gpio_direction_input, - .direction_output = rdc_gpio_direction_output, - .get = rdc_gpio_get_value, - .set = rdc_gpio_set_value, - .base = 0, - .ngpio = RDC321X_MAX_GPIO, -}; - -/* initially setup the 2 copies of the gpio data registers. - This function is called before the platform setup code. */ -static int __init rdc321x_gpio_setup(void) -{ - /* this might not be, what others (BIOS, bootloader, etc.) - wrote to these registers before, but it's a good guess. Still - better than just using 0xffffffff. */ - - gpio_data_reg1 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG1); - gpio_data_reg2 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG2); - - printk(KERN_INFO "rdc321x: registering %d GPIOs\n", rdc321x_gpio_chip.ngpio); - return gpiochip_add(&rdc321x_gpio_chip); -} - -arch_initcall(rdc321x_gpio_setup); |