104 строки
2.6 KiB
C
104 строки
2.6 KiB
C
/* arch/arm/mach-s3c2410/include/mach/gpio-fns.h
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*
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* Copyright (c) 2003,2009 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C2410 - hardware
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* These functions are in the to-be-removed category and it is strongly
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* encouraged not to use these in new code. They will be marked deprecated
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* very soon.
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*
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* Most of the functionality can be either replaced by the gpiocfg calls
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* for the s3c platform or by the generic GPIOlib API.
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*/
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/* external functions for GPIO support
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*
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* These allow various different clients to access the same GPIO
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* registers without conflicting. If your driver only owns the entire
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* GPIO register, then it is safe to ioremap/__raw_{read|write} to it.
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*/
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/* s3c2410_gpio_cfgpin
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*
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* set the configuration of the given pin to the value passed.
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*
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* eg:
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* s3c2410_gpio_cfgpin(S3C2410_GPA(0), S3C2410_GPA0_ADDR0);
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* s3c2410_gpio_cfgpin(S3C2410_GPE(8), S3C2410_GPE8_SDDAT1);
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*/
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extern void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function);
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extern unsigned int s3c2410_gpio_getcfg(unsigned int pin);
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/* s3c2410_gpio_getirq
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*
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* turn the given pin number into the corresponding IRQ number
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*
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* returns:
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* < 0 = no interrupt for this pin
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* >=0 = interrupt number for the pin
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*/
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extern int s3c2410_gpio_getirq(unsigned int pin);
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#ifdef CONFIG_CPU_S3C2400
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extern int s3c2400_gpio_getirq(unsigned int pin);
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#endif /* CONFIG_CPU_S3C2400 */
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/* s3c2410_gpio_irqfilter
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*
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* set the irq filtering on the given pin
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*
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* on = 0 => disable filtering
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* 1 => enable filtering
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*
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* config = S3C2410_EINTFLT_PCLK or S3C2410_EINTFLT_EXTCLK orred with
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* width of filter (0 through 63)
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*
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*
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*/
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extern int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
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unsigned int config);
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/* s3c2410_gpio_pullup
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*
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* configure the pull-up control on the given pin
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*
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* to = 1 => disable the pull-up
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* 0 => enable the pull-up
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*
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* eg;
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*
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* s3c2410_gpio_pullup(S3C2410_GPB(0), 0);
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* s3c2410_gpio_pullup(S3C2410_GPE(8), 0);
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*/
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extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to);
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/* s3c2410_gpio_getpull
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*
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* Read the state of the pull-up on a given pin
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*
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* return:
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* < 0 => error code
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* 0 => enabled
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* 1 => disabled
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*/
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extern int s3c2410_gpio_getpull(unsigned int pin);
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extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to);
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extern unsigned int s3c2410_gpio_getpin(unsigned int pin);
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