Viewing file:  etraxgpio.h (3.02 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* The following devices are accessible using this driver using
* GPIO_MAJOR (120) and a couple of minor numbers.
*
* For ETRAX 100LX (CONFIG_ETRAX_ARCH_V10):
* /dev/gpioa minor 0, 8 bit GPIO, each bit can change direction
* /dev/gpiob minor 1, 8 bit GPIO, each bit can change direction
* /dev/leds minor 2, Access to leds depending on kernelconfig
* /dev/gpiog minor 3
* g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG
* g1-g7 and g25-g31 is both input and outputs but on different pins
* Also note that some bits change pins depending on what interfaces
* are enabled.
*/
#ifndef _ASM_ETRAXGPIO_H
#define _ASM_ETRAXGPIO_H
#define GPIO_MINOR_FIRST 0
#define ETRAXGPIO_IOCTYPE 43
/* etraxgpio _IOC_TYPE, bits 8 to 15 in ioctl cmd */
#define GPIO_MINOR_A 0
#define GPIO_MINOR_B 1
#define GPIO_MINOR_LEDS 2
#define GPIO_MINOR_G 3
#define GPIO_MINOR_LAST 3
#define GPIO_MINOR_LAST_REAL GPIO_MINOR_LAST
/* supported ioctl _IOC_NR's */
#define IO_READBITS 0x1 /* read and return current port bits (obsolete) */
#define IO_SETBITS 0x2 /* set the bits marked by 1 in the argument */
#define IO_CLRBITS 0x3 /* clear the bits marked by 1 in the argument */
/* the alarm is waited for by select() */
#define IO_HIGHALARM 0x4 /* set alarm on high for bits marked by 1 */
#define IO_LOWALARM 0x5 /* set alarm on low for bits marked by 1 */
#define IO_CLRALARM 0x6 /* clear alarm for bits marked by 1 */
/* LED ioctl */
#define IO_LEDACTIVE_SET 0x7 /* set active led
* 0=off, 1=green, 2=red, 3=yellow */
/* GPIO direction ioctl's */
#define IO_READDIR 0x8 /* Read direction 0=input 1=output (obsolete) */
#define IO_SETINPUT 0x9 /* Set direction for bits set, 0=unchanged 1=input,
returns mask with current inputs (obsolete) */
#define IO_SETOUTPUT 0xA /* Set direction for bits set, 0=unchanged 1=output,
returns mask with current outputs (obsolete)*/
/* LED ioctl extended */
#define IO_LED_SETBIT 0xB
#define IO_LED_CLRBIT 0xC
/* SHUTDOWN ioctl */
#define IO_SHUTDOWN 0xD
#define IO_GET_PWR_BT 0xE
/* Bit toggling in driver settings */
/* bit set in low byte0 is CLK mask (0x00FF),
bit set in byte1 is DATA mask (0xFF00)
msb, data_mask[7:0] , clk_mask[7:0]
*/
#define IO_CFG_WRITE_MODE 0xF
#define IO_CFG_WRITE_MODE_VALUE(msb, data_mask, clk_mask) \
( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) )
/* The following 4 ioctl's take a pointer as argument and handles
* 32 bit ports (port G) properly.
* These replaces IO_READBITS,IO_SETINPUT AND IO_SETOUTPUT
*/
#define IO_READ_INBITS 0x10 /* *arg is result of reading the input pins */
#define IO_READ_OUTBITS 0x11 /* *arg is result of reading the output shadow */
#define IO_SETGET_INPUT 0x12 /* bits set in *arg is set to input, */
/* *arg updated with current input pins. */
#define IO_SETGET_OUTPUT 0x13 /* bits set in *arg is set to output, */
/* *arg updated with current output pins. */
#endif
|