tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * The following devices are accessible using this driver using
4 * GPIO_MAJOR (120) and a couple of minor numbers.
5 *
6 * For ETRAX 100LX (CONFIG_ETRAX_ARCH_V10):
7 * /dev/gpioa minor 0, 8 bit GPIO, each bit can change direction
8 * /dev/gpiob minor 1, 8 bit GPIO, each bit can change direction
9 * /dev/leds minor 2, Access to leds depending on kernelconfig
10 * /dev/gpiog minor 3
11 * g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG
12 * g1-g7 and g25-g31 is both input and outputs but on different pins
13 * Also note that some bits change pins depending on what interfaces
14 * are enabled.
15 */
16#ifndef _ASM_ETRAXGPIO_H
17#define _ASM_ETRAXGPIO_H
18
19#define GPIO_MINOR_FIRST 0
20
21#define ETRAXGPIO_IOCTYPE 43
22
23/* etraxgpio _IOC_TYPE, bits 8 to 15 in ioctl cmd */
24#define GPIO_MINOR_A 0
25#define GPIO_MINOR_B 1
26#define GPIO_MINOR_LEDS 2
27#define GPIO_MINOR_G 3
28#define GPIO_MINOR_LAST 3
29#define GPIO_MINOR_LAST_REAL GPIO_MINOR_LAST
30
31
32/* supported ioctl _IOC_NR's */
33
34#define IO_READBITS 0x1 /* read and return current port bits (obsolete) */
35#define IO_SETBITS 0x2 /* set the bits marked by 1 in the argument */
36#define IO_CLRBITS 0x3 /* clear the bits marked by 1 in the argument */
37
38/* the alarm is waited for by select() */
39
40#define IO_HIGHALARM 0x4 /* set alarm on high for bits marked by 1 */
41#define IO_LOWALARM 0x5 /* set alarm on low for bits marked by 1 */
42#define IO_CLRALARM 0x6 /* clear alarm for bits marked by 1 */
43
44/* LED ioctl */
45#define IO_LEDACTIVE_SET 0x7 /* set active led
46 * 0=off, 1=green, 2=red, 3=yellow */
47
48/* GPIO direction ioctl's */
49#define IO_READDIR 0x8 /* Read direction 0=input 1=output (obsolete) */
50#define IO_SETINPUT 0x9 /* Set direction for bits set, 0=unchanged 1=input,
51 returns mask with current inputs (obsolete) */
52#define IO_SETOUTPUT 0xA /* Set direction for bits set, 0=unchanged 1=output,
53 returns mask with current outputs (obsolete)*/
54
55/* LED ioctl extended */
56#define IO_LED_SETBIT 0xB
57#define IO_LED_CLRBIT 0xC
58
59/* SHUTDOWN ioctl */
60#define IO_SHUTDOWN 0xD
61#define IO_GET_PWR_BT 0xE
62
63/* Bit toggling in driver settings */
64/* bit set in low byte0 is CLK mask (0x00FF),
65 bit set in byte1 is DATA mask (0xFF00)
66 msb, data_mask[7:0] , clk_mask[7:0]
67 */
68#define IO_CFG_WRITE_MODE 0xF
69#define IO_CFG_WRITE_MODE_VALUE(msb, data_mask, clk_mask) \
70 ( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) )
71
72/* The following 4 ioctl's take a pointer as argument and handles
73 * 32 bit ports (port G) properly.
74 * These replaces IO_READBITS,IO_SETINPUT AND IO_SETOUTPUT
75 */
76#define IO_READ_INBITS 0x10 /* *arg is result of reading the input pins */
77#define IO_READ_OUTBITS 0x11 /* *arg is result of reading the output shadow */
78#define IO_SETGET_INPUT 0x12 /* bits set in *arg is set to input, */
79 /* *arg updated with current input pins. */
80#define IO_SETGET_OUTPUT 0x13 /* bits set in *arg is set to output, */
81 /* *arg updated with current output pins. */
82
83#endif