diff options
Diffstat (limited to 'target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/gpio.c')
| -rw-r--r-- | target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/gpio.c | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/gpio.c b/target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/gpio.c deleted file mode 100644 index 408a4158d..000000000 --- a/target/linux/rdc/files-2.6.30/arch/x86/mach-rdc321x/gpio.c +++ /dev/null @@ -1,174 +0,0 @@ -/* - * RDC321x GPIO driver - * - * Copyright (C) 2008, Volker Weiss <dev@tintuc.de> - * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org> - * - * 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/module.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/platform_device.h> -#include <linux/pci.h> -#include <linux/gpio.h> - -#include <asm/rdc321x_defs.h> - -struct rdc321x_gpio { - spinlock_t lock; - u32 data_reg[2]; -} rdc321x_gpio_dev; - -extern int rdc321x_pci_write(int reg, u32 val); -extern int rdc321x_pci_read(int reg, u32 *val); - -/* read GPIO pin */ -static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio) -{ - u32 value = 0; - int reg; - - reg = gpio < 32 ? RDC321X_GPIO_DATA_REG1 : RDC321X_GPIO_DATA_REG2; - - spin_lock(&rdc321x_gpio_dev.lock); - rdc321x_pci_write(reg, rdc321x_gpio_dev.data_reg[gpio < 32 ? 0 : 1]); - rdc321x_pci_read(reg, &value); - spin_unlock(&rdc321x_gpio_dev.lock); - - return (1 << (gpio & 0x1f)) & value ? 1 : 0; -} - -static void rdc_gpio_set_value_impl(struct gpio_chip *chip, - unsigned gpio, int value) -{ - int reg = (gpio < 32) ? 0 : 1; - - if (value) - rdc321x_gpio_dev.data_reg[reg] |= 1 << (gpio & 0x1f); - else - rdc321x_gpio_dev.data_reg[reg] &= ~(1 << (gpio & 0x1f)); - - rdc321x_pci_write(reg ? RDC321X_GPIO_DATA_REG2 : RDC321X_GPIO_DATA_REG1, - rdc321x_gpio_dev.data_reg[reg]); -} - -/* set GPIO pin to value */ -static void rdc_gpio_set_value(struct gpio_chip *chip, - unsigned gpio, int value) -{ - spin_lock(&rdc321x_gpio_dev.lock); - rdc_gpio_set_value_impl(chip, gpio, value); - spin_unlock(&rdc321x_gpio_dev.lock); -} - -static int rdc_gpio_config(struct gpio_chip *chip, - unsigned gpio, int value) -{ - int err; - u32 reg; - - spin_lock(&rdc321x_gpio_dev.lock); - err = rdc321x_pci_read(gpio < 32 ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2, - ®); - if (err) - goto unlock; - - reg |= 1 << (gpio & 0x1f); - - err = rdc321x_pci_write(gpio < 32 ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2, - reg); - if (err) - goto unlock; - - rdc_gpio_set_value_impl(chip, gpio, value); - -unlock: - spin_unlock(&rdc321x_gpio_dev.lock); - - return err; -} - -/* configure GPIO pin as input */ -static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) -{ - return rdc_gpio_config(chip, gpio, 1); -} - -static struct gpio_chip rdc321x_gpio_chip = { - .label = "rdc321x-gpio", - .direction_input = rdc_gpio_direction_input, - .direction_output = rdc_gpio_config, - .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 __devinit rdc321x_gpio_probe(struct platform_device *pdev) -{ - int err; - - /* 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. */ - err = rdc321x_pci_read(RDC321X_GPIO_DATA_REG1, &rdc321x_gpio_dev.data_reg[0]); - if (err) - return err; - - err = rdc321x_pci_read(RDC321X_GPIO_DATA_REG2, &rdc321x_gpio_dev.data_reg[1]); - if (err) - return err; - - spin_lock_init(&rdc321x_gpio_dev.lock); - - printk(KERN_INFO "rdc321x: registering %d GPIOs\n", rdc321x_gpio_chip.ngpio); - return gpiochip_add(&rdc321x_gpio_chip); -} - -static int __devexit rdc321x_gpio_remove(struct platform_device *pdev) -{ - gpiochip_remove(&rdc321x_gpio_chip); - return 0; -} - -static struct platform_driver rdc321x_gpio_driver = { - .driver.name = "rdc321x-gpio", - .driver.owner = THIS_MODULE, - .probe = rdc321x_gpio_probe, - .remove = __devexit_p(rdc321x_gpio_remove), -}; - -static int __init rdc321x_gpio_init(void) -{ - return platform_driver_register(&rdc321x_gpio_driver); -} - -static void __exit rdc321x_gpio_exit(void) -{ - platform_driver_unregister(&rdc321x_gpio_driver); -} - -module_init(rdc321x_gpio_init); -module_exit(rdc321x_gpio_exit); - -MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); -MODULE_DESCRIPTION("RDC321x GPIO driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:rdc321x-gpio"); |