diff options
Diffstat (limited to 'arch/sh/cchips/hd6446x/hd64465/gpio.c')
| -rw-r--r-- | arch/sh/cchips/hd6446x/hd64465/gpio.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arch/sh/cchips/hd6446x/hd64465/gpio.c b/arch/sh/cchips/hd6446x/hd64465/gpio.c deleted file mode 100644 index 43431855ec86..000000000000 --- a/arch/sh/cchips/hd6446x/hd64465/gpio.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - * $Id: gpio.c,v 1.4 2003/05/19 22:24:18 lethal Exp $ - * by Greg Banks <gbanks@pocketpenguins.com> - * (c) 2000 PocketPenguins Inc - * - * GPIO pin support for HD64465 companion chip. - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/ioport.h> -#include <asm/io.h> -#include <asm/hd64465/gpio.h> - -#define _PORTOF(portpin) (((portpin)>>3)&0x7) -#define _PINOF(portpin) ((portpin)&0x7) - -/* Register addresses parametrised on port */ -#define GPIO_CR(port) (HD64465_REG_GPACR+((port)<<1)) -#define GPIO_DR(port) (HD64465_REG_GPADR+((port)<<1)) -#define GPIO_ICR(port) (HD64465_REG_GPAICR+((port)<<1)) -#define GPIO_ISR(port) (HD64465_REG_GPAISR+((port)<<1)) - -#define GPIO_NPORTS 5 - -#define MODNAME "hd64465_gpio" - -EXPORT_SYMBOL(hd64465_gpio_configure); -EXPORT_SYMBOL(hd64465_gpio_get_pin); -EXPORT_SYMBOL(hd64465_gpio_get_port); -EXPORT_SYMBOL(hd64465_gpio_register_irq); -EXPORT_SYMBOL(hd64465_gpio_set_pin); -EXPORT_SYMBOL(hd64465_gpio_set_port); -EXPORT_SYMBOL(hd64465_gpio_unregister_irq); - -/* TODO: each port should be protected with a spinlock */ - - -void hd64465_gpio_configure(int portpin, int direction) -{ - unsigned short cr; - unsigned int shift = (_PINOF(portpin)<<1); - - cr = inw(GPIO_CR(_PORTOF(portpin))); - cr &= ~(3<<shift); - cr |= direction<<shift; - outw(cr, GPIO_CR(_PORTOF(portpin))); -} - -void hd64465_gpio_set_pin(int portpin, unsigned int value) -{ - unsigned short d; - unsigned short mask = 1<<(_PINOF(portpin)); - - d = inw(GPIO_DR(_PORTOF(portpin))); - if (value) - d |= mask; - else - d &= ~mask; - outw(d, GPIO_DR(_PORTOF(portpin))); -} - -unsigned int hd64465_gpio_get_pin(int portpin) -{ - return inw(GPIO_DR(_PORTOF(portpin))) & (1<<(_PINOF(portpin))); -} - -/* TODO: for cleaner atomicity semantics, add a mask to this routine */ - -void hd64465_gpio_set_port(int port, unsigned int value) -{ - outw(value, GPIO_DR(port)); -} - -unsigned int hd64465_gpio_get_port(int port) -{ - return inw(GPIO_DR(port)); -} - - -static struct { - void (*func)(int portpin, void *dev); - void *dev; -} handlers[GPIO_NPORTS * 8]; - -static irqreturn_t hd64465_gpio_interrupt(int irq, void *dev) -{ - unsigned short port, pin, isr, mask, portpin; - - for (port=0 ; port<GPIO_NPORTS ; port++) { - isr = inw(GPIO_ISR(port)); - - for (pin=0 ; pin<8 ; pin++) { - mask = 1<<pin; - if (isr & mask) { - portpin = (port<<3)|pin; - if (handlers[portpin].func != 0) - handlers[portpin].func(portpin, handlers[portpin].dev); - else - printk(KERN_NOTICE "unexpected GPIO interrupt, pin %c%d\n", - port+'A', (int)pin); - } - } - - /* Write 1s back to ISR to clear it? That's what the manual says.. */ - outw(isr, GPIO_ISR(port)); - } - - return IRQ_HANDLED; -} - -void hd64465_gpio_register_irq(int portpin, int mode, - void (*handler)(int portpin, void *dev), void *dev) -{ - unsigned long flags; - unsigned short icr, mask; - - if (handler == 0) - return; - - local_irq_save(flags); - - handlers[portpin].func = handler; - handlers[portpin].dev = dev; - - /* - * Configure Interrupt Control Register - */ - icr = inw(GPIO_ICR(_PORTOF(portpin))); - mask = (1<<_PINOF(portpin)); - - /* unmask interrupt */ - icr &= ~mask; - - /* set TS bit */ - mask <<= 8; - icr &= ~mask; - if (mode == HD64465_GPIO_RISING) - icr |= mask; - - outw(icr, GPIO_ICR(_PORTOF(portpin))); - - local_irq_restore(flags); -} - -void hd64465_gpio_unregister_irq(int portpin) -{ - unsigned long flags; - unsigned short icr; - - local_irq_save(flags); - - /* - * Configure Interrupt Control Register - */ - icr = inw(GPIO_ICR(_PORTOF(portpin))); - icr |= (1<<_PINOF(portpin)); /* mask interrupt */ - outw(icr, GPIO_ICR(_PORTOF(portpin))); - - handlers[portpin].func = 0; - handlers[portpin].dev = 0; - - local_irq_restore(flags); -} - -static int __init hd64465_gpio_init(void) -{ - if (!request_region(HD64465_REG_GPACR, 0x1000, MODNAME)) - return -EBUSY; - if (request_irq(HD64465_IRQ_GPIO, hd64465_gpio_interrupt, - IRQF_DISABLED, MODNAME, 0)) - goto out_irqfailed; - - printk("HD64465 GPIO layer on irq %d\n", HD64465_IRQ_GPIO); - - return 0; - -out_irqfailed: - release_region(HD64465_REG_GPACR, 0x1000); - - return -EINVAL; -} - -static void __exit hd64465_gpio_exit(void) -{ - release_region(HD64465_REG_GPACR, 0x1000); - free_irq(HD64465_IRQ_GPIO, 0); -} - -module_init(hd64465_gpio_init); -module_exit(hd64465_gpio_exit); - -MODULE_LICENSE("GPL"); - |