diff options
Diffstat (limited to 'arch/arm/mach-ks8695/gpio.c')
| -rw-r--r-- | arch/arm/mach-ks8695/gpio.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/arch/arm/mach-ks8695/gpio.c b/arch/arm/mach-ks8695/gpio.c deleted file mode 100644 index b1aa3cb3d4a..00000000000 --- a/arch/arm/mach-ks8695/gpio.c +++ /dev/null @@ -1,218 +0,0 @@ -/* - * arch/arm/mach-ks8695/gpio.c - * - * Copyright (C) 2006 Andrew Victor - * - * 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. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/module.h> - -#include <asm/io.h> -#include <asm/hardware.h> -#include <asm/mach/irq.h> - -#include <asm/arch/regs-gpio.h> -#include <asm/arch/gpio.h> - -/* - * Configure a GPIO line for either GPIO function, or its internal - * function (Interrupt, Timer, etc). - */ -static void __init_or_module ks8695_gpio_mode(unsigned int pin, short gpio) -{ - unsigned int enable[] = { IOPC_IOEINT0EN, IOPC_IOEINT1EN, IOPC_IOEINT2EN, IOPC_IOEINT3EN, IOPC_IOTIM0EN, IOPC_IOTIM1EN }; - unsigned long x, flags; - - if (pin > KS8695_GPIO_5) /* only GPIO 0..5 have internal functions */ - return; - - local_irq_save(flags); - - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC); - if (gpio) /* GPIO: set bit to 0 */ - x &= ~enable[pin]; - else /* Internal function: set bit to 1 */ - x |= enable[pin]; - __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPC); - - local_irq_restore(flags); -} - - -static unsigned short gpio_irq[] = { KS8695_IRQ_EXTERN0, KS8695_IRQ_EXTERN1, KS8695_IRQ_EXTERN2, KS8695_IRQ_EXTERN3 }; - -/* - * Configure GPIO pin as external interrupt source. - */ -int __init_or_module ks8695_gpio_interrupt(unsigned int pin, unsigned int type) -{ - unsigned long x, flags; - - if (pin > KS8695_GPIO_3) /* only GPIO 0..3 can generate IRQ */ - return -EINVAL; - - local_irq_save(flags); - - /* set pin as input */ - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM); - x &= ~IOPM_(pin); - __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM); - - local_irq_restore(flags); - - /* Set IRQ triggering type */ - set_irq_type(gpio_irq[pin], type); - - /* enable interrupt mode */ - ks8695_gpio_mode(pin, 0); - - return 0; -} -EXPORT_SYMBOL(ks8695_gpio_interrupt); - - - -/* .... Generic GPIO interface .............................................. */ - -/* - * Configure the GPIO line as an input. - */ -int __init_or_module gpio_direction_input(unsigned int pin) -{ - unsigned long x, flags; - - if (pin > KS8695_GPIO_15) - return -EINVAL; - - /* set pin to GPIO mode */ - ks8695_gpio_mode(pin, 1); - - local_irq_save(flags); - - /* set pin as input */ - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM); - x &= ~IOPM_(pin); - __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM); - - local_irq_restore(flags); - - return 0; -} -EXPORT_SYMBOL(gpio_direction_input); - - -/* - * Configure the GPIO line as an output, with default state. - */ -int __init_or_module gpio_direction_output(unsigned int pin, unsigned int state) -{ - unsigned long x, flags; - - if (pin > KS8695_GPIO_15) - return -EINVAL; - - /* set pin to GPIO mode */ - ks8695_gpio_mode(pin, 1); - - local_irq_save(flags); - - /* set line state */ - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD); - if (state) - x |= (1 << pin); - else - x &= ~(1 << pin); - __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPD); - - /* set pin as output */ - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPM); - x |= IOPM_(pin); - __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPM); - - local_irq_restore(flags); - - return 0; -} -EXPORT_SYMBOL(gpio_direction_output); - - -/* - * Set the state of an output GPIO line. - */ -void gpio_set_value(unsigned int pin, unsigned int state) -{ - unsigned long x, flags; - - if (pin > KS8695_GPIO_15) - return; - - local_irq_save(flags); - - /* set output line state */ - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD); - if (state) - x |= (1 << pin); - else - x &= ~(1 << pin); - __raw_writel(x, KS8695_GPIO_VA + KS8695_IOPD); - - local_irq_restore(flags); -} -EXPORT_SYMBOL(gpio_set_value); - - -/* - * Read the state of a GPIO line. - */ -int gpio_get_value(unsigned int pin) -{ - unsigned long x; - - if (pin > KS8695_GPIO_15) - return -EINVAL; - - x = __raw_readl(KS8695_GPIO_VA + KS8695_IOPD); - return (x & (1 << pin)) != 0; -} -EXPORT_SYMBOL(gpio_get_value); - - -/* - * Map GPIO line to IRQ number. - */ -int gpio_to_irq(unsigned int pin) -{ - if (pin > KS8695_GPIO_3) /* only GPIO 0..3 can generate IRQ */ - return -EINVAL; - - return gpio_irq[pin]; -} -EXPORT_SYMBOL(gpio_to_irq); - - -/* - * Map IRQ number to GPIO line. - */ -int irq_to_gpio(unsigned int irq) -{ - if ((irq < KS8695_IRQ_EXTERN0) || (irq > KS8695_IRQ_EXTERN3)) - return -EINVAL; - - return (irq - KS8695_IRQ_EXTERN0); -} -EXPORT_SYMBOL(irq_to_gpio); |