projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ec976d6e BD |
1 | /* arch/arm/mach-s3c2410/include/mach/gpio-fns.h |
| 2 | * | |
| ccae941e | 3 | * Copyright (c) 2003-2009 Simtec Electronics |
| ec976d6e BD |
4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * | |
| 6 | * S3C2410 - hardware | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | /* These functions are in the to-be-removed category and it is strongly | |
| 14 | * encouraged not to use these in new code. They will be marked deprecated | |
| 15 | * very soon. | |
| 16 | * | |
| 17 | * Most of the functionality can be either replaced by the gpiocfg calls | |
| 18 | * for the s3c platform or by the generic GPIOlib API. | |
| 19 | */ | |
| 20 | ||
| 21 | /* external functions for GPIO support | |
| 22 | * | |
| 23 | * These allow various different clients to access the same GPIO | |
| 24 | * registers without conflicting. If your driver only owns the entire | |
| 25 | * GPIO register, then it is safe to ioremap/__raw_{read|write} to it. | |
| 26 | */ | |
| 27 | ||
| 28 | /* s3c2410_gpio_cfgpin | |
| 29 | * | |
| 30 | * set the configuration of the given pin to the value passed. | |
| 31 | * | |
| 32 | * eg: | |
| 070276d5 BD |
33 | * s3c2410_gpio_cfgpin(S3C2410_GPA(0), S3C2410_GPA0_ADDR0); |
| 34 | * s3c2410_gpio_cfgpin(S3C2410_GPE(8), S3C2410_GPE8_SDDAT1); | |
| ec976d6e BD |
35 | */ |
| 36 | ||
| 37 | extern void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function); | |
| 38 | ||
| 39 | extern unsigned int s3c2410_gpio_getcfg(unsigned int pin); | |
| 40 | ||
| 41 | /* s3c2410_gpio_getirq | |
| 42 | * | |
| 43 | * turn the given pin number into the corresponding IRQ number | |
| 44 | * | |
| 45 | * returns: | |
| 46 | * < 0 = no interrupt for this pin | |
| 47 | * >=0 = interrupt number for the pin | |
| 48 | */ | |
| 49 | ||
| 50 | extern int s3c2410_gpio_getirq(unsigned int pin); | |
| 51 | ||
| 52 | #ifdef CONFIG_CPU_S3C2400 | |
| 53 | ||
| 54 | extern int s3c2400_gpio_getirq(unsigned int pin); | |
| 55 | ||
| 56 | #endif /* CONFIG_CPU_S3C2400 */ | |
| 57 | ||
| 58 | /* s3c2410_gpio_irqfilter | |
| 59 | * | |
| 60 | * set the irq filtering on the given pin | |
| 61 | * | |
| 62 | * on = 0 => disable filtering | |
| 63 | * 1 => enable filtering | |
| 64 | * | |
| 65 | * config = S3C2410_EINTFLT_PCLK or S3C2410_EINTFLT_EXTCLK orred with | |
| 66 | * width of filter (0 through 63) | |
| 67 | * | |
| 68 | * | |
| 69 | */ | |
| 70 | ||
| 71 | extern int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on, | |
| 72 | unsigned int config); | |
| 73 | ||
| 74 | /* s3c2410_gpio_pullup | |
| 75 | * | |
| 76 | * configure the pull-up control on the given pin | |
| 77 | * | |
| 78 | * to = 1 => disable the pull-up | |
| 79 | * 0 => enable the pull-up | |
| 80 | * | |
| 81 | * eg; | |
| 82 | * | |
| 070276d5 BD |
83 | * s3c2410_gpio_pullup(S3C2410_GPB(0), 0); |
| 84 | * s3c2410_gpio_pullup(S3C2410_GPE(8), 0); | |
| ec976d6e BD |
85 | */ |
| 86 | ||
| 87 | extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to); | |
| 88 | ||
| 89 | /* s3c2410_gpio_getpull | |
| 90 | * | |
| 91 | * Read the state of the pull-up on a given pin | |
| 92 | * | |
| 93 | * return: | |
| 94 | * < 0 => error code | |
| 95 | * 0 => enabled | |
| 96 | * 1 => disabled | |
| 97 | */ | |
| 98 | ||
| 99 | extern int s3c2410_gpio_getpull(unsigned int pin); | |
| 100 | ||
| 101 | extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to); | |
| 102 | ||
| 103 | extern unsigned int s3c2410_gpio_getpin(unsigned int pin); |