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gpio-fns.h

/* arch/arm/mach-s3c2410/include/mach/gpio-fns.h
 *
 * Copyright (c) 2003,2009 Simtec Electronics
 *    Ben Dooks <ben@simtec.co.uk>
 *
 * S3C2410 - hardware
 *
 * 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.
*/

/* These functions are in the to-be-removed category and it is strongly
 * encouraged not to use these in new code. They will be marked deprecated
 * very soon.
 *
 * Most of the functionality can be either replaced by the gpiocfg calls
 * for the s3c platform or by the generic GPIOlib API.
*/

/* external functions for GPIO support
 *
 * These allow various different clients to access the same GPIO
 * registers without conflicting. If your driver only owns the entire
 * GPIO register, then it is safe to ioremap/__raw_{read|write} to it.
*/

/* s3c2410_gpio_cfgpin
 *
 * set the configuration of the given pin to the value passed.
 *
 * eg:
 *    s3c2410_gpio_cfgpin(S3C2410_GPA(0), S3C2410_GPA0_ADDR0);
 *    s3c2410_gpio_cfgpin(S3C2410_GPE(8), S3C2410_GPE8_SDDAT1);
*/

extern void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function);

extern unsigned int s3c2410_gpio_getcfg(unsigned int pin);

/* s3c2410_gpio_getirq
 *
 * turn the given pin number into the corresponding IRQ number
 *
 * returns:
 *    < 0 = no interrupt for this pin
 *    >=0 = interrupt number for the pin
*/

extern int s3c2410_gpio_getirq(unsigned int pin);

#ifdef CONFIG_CPU_S3C2400

extern int s3c2400_gpio_getirq(unsigned int pin);

#endif /* CONFIG_CPU_S3C2400 */

/* s3c2410_gpio_irqfilter
 *
 * set the irq filtering on the given pin
 *
 * on = 0 => disable filtering
 *      1 => enable filtering
 *
 * config = S3C2410_EINTFLT_PCLK or S3C2410_EINTFLT_EXTCLK orred with
 *          width of filter (0 through 63)
 *
 *
*/

extern int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
                          unsigned int config);

/* s3c2410_gpio_pullup
 *
 * configure the pull-up control on the given pin
 *
 * to = 1 => disable the pull-up
 *      0 => enable the pull-up
 *
 * eg;
 *
 *   s3c2410_gpio_pullup(S3C2410_GPB(0), 0);
 *   s3c2410_gpio_pullup(S3C2410_GPE(8), 0);
*/

extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to);

/* s3c2410_gpio_getpull
 *
 * Read the state of the pull-up on a given pin
 *
 * return:
 *    < 0 => error code
 *      0 => enabled
 *      1 => disabled
*/

extern int s3c2410_gpio_getpull(unsigned int pin);

extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to);

extern unsigned int s3c2410_gpio_getpin(unsigned int pin);

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