2 * The following devices are accessable using this driver using
3 * GPIO_MAJOR (120) and a couple of minor numbers:
4 * /dev/gpioa minor 0, 8 bit GPIO, each bit can change direction
5 * /dev/gpiob minor 1, 8 bit GPIO, each bit can change direction
6 * /dev/leds minor 2, Access to leds depending on kernelconfig
8 * g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG
9 * g1-g7 and g25-g31 is both input and outputs but on different pins
10 * Also note that some bits change pins depending on what interfaces
14 #ifndef _ASM_ETRAXGPIO_H
15 #define _ASM_ETRAXGPIO_H
17 /* etraxgpio _IOC_TYPE, bits 8 to 15 in ioctl cmd */
19 #define ETRAXGPIO_IOCTYPE 43
20 #define GPIO_MINOR_A 0
21 #define GPIO_MINOR_B 1
22 #define GPIO_MINOR_LEDS 2
23 #define GPIO_MINOR_G 3
24 #define GPIO_MINOR_LAST 3
26 /* supported ioctl _IOC_NR's */
28 #define IO_READBITS 0x1 /* read and return current port bits (obsolete) */
29 #define IO_SETBITS 0x2 /* set the bits marked by 1 in the argument */
30 #define IO_CLRBITS 0x3 /* clear the bits marked by 1 in the argument */
32 /* the alarm is waited for by select() */
34 #define IO_HIGHALARM 0x4 /* set alarm on high for bits marked by 1 */
35 #define IO_LOWALARM 0x5 /* set alarm on low for bits marked by 1 */
36 #define IO_CLRALARM 0x6 /* clear alarm for bits marked by 1 */
39 #define IO_LEDACTIVE_SET 0x7 /* set active led
40 * 0=off, 1=green, 2=red, 3=yellow */
42 /* GPIO direction ioctl's */
43 #define IO_READDIR 0x8 /* Read direction 0=input 1=output (obsolete) */
44 #define IO_SETINPUT 0x9 /* Set direction for bits set, 0=unchanged 1=input,
45 returns mask with current inputs (obsolete) */
46 #define IO_SETOUTPUT 0xA /* Set direction for bits set, 0=unchanged 1=output,
47 returns mask with current outputs (obsolete)*/
49 /* LED ioctl extended */
50 #define IO_LED_SETBIT 0xB
51 #define IO_LED_CLRBIT 0xC
54 #define IO_SHUTDOWN 0xD
55 #define IO_GET_PWR_BT 0xE
57 /* Bit toggling in driver settings */
58 /* bit set in low byte0 is CLK mask (0x00FF),
59 bit set in byte1 is DATA mask (0xFF00)
60 msb, data_mask[7:0] , clk_mask[7:0]
62 #define IO_CFG_WRITE_MODE 0xF
63 #define IO_CFG_WRITE_MODE_VALUE(msb, data_mask, clk_mask) \
64 ( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) )
66 /* The following 4 ioctl's take a pointer as argument and handles
67 * 32 bit ports (port G) properly.
68 * These replaces IO_READBITS,IO_SETINPUT AND IO_SETOUTPUT
70 #define IO_READ_INBITS 0x10 /* *arg is result of reading the input pins */
71 #define IO_READ_OUTBITS 0x11 /* *arg is result of reading the output shadow */
72 #define IO_SETGET_INPUT 0x12 /* bits set in *arg is set to input,
73 * *arg updated with current input pins.
75 #define IO_SETGET_OUTPUT 0x13 /* bits set in *arg is set to output,
76 * *arg updated with current output pins.