include/asm-cris/etraxgpio.h

   1 /* $Id: etraxgpio.h,v 1.8 2002/06/17 15:53:07 johana Exp $ */
   2 /*
   3  * The following devices are accessable using this driver using
   4  * GPIO_MAJOR (120) and a couple of minor numbers:
   5  * For ETRAX 100LX (ARCH_V10):
   6  * /dev/gpioa  minor 0, 8 bit GPIO, each bit can change direction
   7  * /dev/gpiob  minor 1, 8 bit GPIO, each bit can change direction
   8  * /dev/leds   minor 2, Access to leds depending on kernelconfig
   9  * /dev/gpiog  minor 3
  10          g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG
  11          g1-g7 and g25-g31 is both input and outputs but on different pins
  12          Also note that some bits change pins depending on what interfaces
  13          are enabled.
  14  *
  15  *
  16  * For ETRAX FS (ARCH_V32):
  17  * /dev/gpioa  minor 0,  8 bit GPIO, each bit can change direction
  18  * /dev/gpiob  minor 1, 18 bit GPIO, each bit can change direction
  19  * /dev/gpioc  minor 2, 18 bit GPIO, each bit can change direction
  20  * /dev/gpiod  minor 3, 18 bit GPIO, each bit can change direction
  21  * /dev/gpioe  minor 4, 18 bit GPIO, each bit can change direction
  22  * /dev/leds   minor 5, Access to leds depending on kernelconfig
  23  *
  24  */
  25 #ifndef _ASM_ETRAXGPIO_H
  26 #define _ASM_ETRAXGPIO_H
  27
  28 #include <linux/config.h>
  29 /* etraxgpio _IOC_TYPE, bits 8 to 15 in ioctl cmd */
  30 #ifdef CONFIG_ETRAX_ARCH_V10
  31 #define ETRAXGPIO_IOCTYPE 43
  32 #define GPIO_MINOR_A 0
  33 #define GPIO_MINOR_B 1
  34 #define GPIO_MINOR_LEDS 2
  35 #define GPIO_MINOR_G 3
  36 #define GPIO_MINOR_LAST 3
  37 #endif
  38 #ifdef CONFIG_ETRAX_ARCH_V32
  39 #define ETRAXGPIO_IOCTYPE 43
  40 #define GPIO_MINOR_A 0
  41 #define GPIO_MINOR_B 1
  42 #define GPIO_MINOR_LEDS 2
  43 #define GPIO_MINOR_C 3
  44 #define GPIO_MINOR_D 4
  45 #define GPIO_MINOR_E 5
  46 #define GPIO_MINOR_LAST 5
  47 #endif
  48
  49 /* supported ioctl _IOC_NR's */
  50
  51 #define IO_READBITS  0x1  /* read and return current port bits (obsolete) */
  52 #define IO_SETBITS   0x2  /* set the bits marked by 1 in the argument */
  53 #define IO_CLRBITS   0x3  /* clear the bits marked by 1 in the argument */
  54
  55 /* the alarm is waited for by select() */
  56
  57 #define IO_HIGHALARM 0x4  /* set alarm on high for bits marked by 1 */
  58 #define IO_LOWALARM  0x5  /* set alarm on low for bits marked by 1 */
  59 #define IO_CLRALARM  0x6  /* clear alarm for bits marked by 1 */
  60
  61 /* LED ioctl */
  62 #define IO_LEDACTIVE_SET 0x7 /* set active led
  63                               * 0=off, 1=green, 2=red, 3=yellow */
  64
  65 /* GPIO direction ioctl's */
  66 #define IO_READDIR    0x8  /* Read direction 0=input 1=output  (obsolete) */
  67 #define IO_SETINPUT   0x9  /* Set direction for bits set, 0=unchanged 1=input,
  68                               returns mask with current inputs (obsolete) */
  69 #define IO_SETOUTPUT  0xA  /* Set direction for bits set, 0=unchanged 1=output,
  70                               returns mask with current outputs (obsolete)*/
  71
  72 /* LED ioctl extended */
  73 #define IO_LED_SETBIT 0xB
  74 #define IO_LED_CLRBIT 0xC
  75
  76 /* SHUTDOWN ioctl */
  77 #define IO_SHUTDOWN   0xD
  78 #define IO_GET_PWR_BT 0xE
  79
  80 /* Bit toggling in driver settings */
  81 /* bit set in low byte0 is CLK mask (0x00FF),
  82    bit set in byte1 is DATA mask    (0xFF00)
  83    msb, data_mask[7:0] , clk_mask[7:0]
  84  */
  85 #define IO_CFG_WRITE_MODE 0xF
  86 #define IO_CFG_WRITE_MODE_VALUE(msb, data_mask, clk_mask) \
  87   ( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) )
  88
  89 /* The following 4 ioctl's take a pointer as argument and handles
  90  * 32 bit ports (port G) properly.
  91  * These replaces IO_READBITS,IO_SETINPUT AND IO_SETOUTPUT
  92  */
  93 #define IO_READ_INBITS   0x10 /* *arg is result of reading the input pins */
  94 #define IO_READ_OUTBITS  0x11 /* *arg is result of reading the output shadow */
  95 #define IO_SETGET_INPUT  0x12 /* bits set in *arg is set to input,
  96                                * *arg updated with current input pins.
  97                                */
  98 #define IO_SETGET_OUTPUT 0x13 /* bits set in *arg is set to output,
  99                                * *arg updated with current output pins.
 100                                */
 101
 102
 103
 104 #endif