include/asm-arm/arch-s3c2410/hardware.h

   1 /* linux/include/asm-arm/arch-s3c2410/hardware.h
   2  *
   3  * (c) 2003 Simtec Electronics
   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  * Changelog:
  13  *  21-May-2003 BJD  Created file
  14  *  06-Jun-2003 BJD  Added CPU frequency settings
  15  *  03-Sep-2003 BJD  Linux v2.6 support
  16  *  12-Mar-2004 BJD  Fixed include protection, fixed type of clock vars
  17  *  14-Sep-2004 BJD  Added misccr and getpin to gpio
  18  *  01-Oct-2004 BJD  Added the new gpio functions
  19  *  16-Oct-2004 BJD  Removed the clock variables
  20 */
  21
  22 #ifndef __ASM_ARCH_HARDWARE_H
  23 #define __ASM_ARCH_HARDWARE_H
  24
  25 #ifndef __ASSEMBLY__
  26
  27 /* external functions for GPIO support
  28  *
  29  * These allow various different clients to access the same GPIO
  30  * registers without conflicting. If your driver only owns the entire
  31  * GPIO register, then it is safe to ioremap/__raw_{read|write} to it.
  32 */
  33
  34 /* s3c2410_gpio_cfgpin
  35  *
  36  * set the configuration of the given pin to the value passed.
  37  *
  38  * eg:
  39  *    s3c2410_gpio_cfgpin(S3C2410_GPA0, S3C2410_GPA0_ADDR0);
  40  *    s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_SDDAT1);
  41 */
  42
  43 extern void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function);
  44
  45 extern unsigned int s3c2410_gpio_getcfg(unsigned int pin);
  46
  47 /* s3c2410_gpio_getirq
  48  *
  49  * turn the given pin number into the corresponding IRQ number
  50  *
  51  * returns:
  52  *      < 0 = no interrupt for this pin
  53  *      >=0 = interrupt number for the pin
  54 */
  55
  56 extern int s3c2410_gpio_getirq(unsigned int pin);
  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  *
  83  *   s3c2410_gpio_pullup(S3C2410_GPB0, 0);
  84  *   s3c2410_gpio_pullup(S3C2410_GPE8, 0);
  85 */
  86
  87 extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to);
  88
  89 extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to);
  90
  91 extern unsigned int s3c2410_gpio_getpin(unsigned int pin);
  92
  93 extern unsigned int s3c2410_modify_misccr(unsigned int clr, unsigned int chg);
  94
  95 #endif /* __ASSEMBLY__ */
  96
  97 #include <asm/sizes.h>
  98 #include <asm/arch/map.h>
  99
 100 /* machine specific hardware definitions should go after this */
 101
 102 /* currently here until moved into config (todo) */
 103 #define CONFIG_NO_MULTIWORD_IO
 104
 105 #endif /* __ASM_ARCH_HARDWARE_H */