| 1 | /* |
| 2 | * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us> |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file "COPYING" in the main directory of this archive |
| 6 | * for more details. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/proc_fs.h> |
| 13 | #include <asm/uaccess.h> |
| 14 | #include <adm8668.h> |
| 15 | |
| 16 | int adm8668_sesled_write_proc(struct file *file, const char *buffer, unsigned long count, void *data) |
| 17 | { |
| 18 | char buf[8]; |
| 19 | int num; |
| 20 | |
| 21 | num = (count < 8) ? count : 8; |
| 22 | |
| 23 | if (copy_from_user(buf, buffer, num)) |
| 24 | { |
| 25 | printk("copy_from_user failed"); |
| 26 | return -EFAULT; |
| 27 | } |
| 28 | num = simple_strtoul(buf, NULL, 16); |
| 29 | switch (num) |
| 30 | { |
| 31 | case 0: |
| 32 | GPIO_SET_LOW(0); |
| 33 | CRGPIO_SET_LOW(2); |
| 34 | break; |
| 35 | case 1: |
| 36 | GPIO_SET_LOW(0); |
| 37 | CRGPIO_SET_HI(2); |
| 38 | break; |
| 39 | case 2: |
| 40 | GPIO_SET_HI(0); |
| 41 | CRGPIO_SET_HI(2); |
| 42 | break; |
| 43 | default: |
| 44 | break; |
| 45 | } |
| 46 | |
| 47 | return count; |
| 48 | } |
| 49 | |
| 50 | int adm8668_sesled_read_proc(char *buf, char **start, off_t offset, int count, int *eof, void *data) |
| 51 | { |
| 52 | int len = 0; |
| 53 | int led_state = 0; |
| 54 | |
| 55 | led_state = (ADM8668_CONFIG_REG(CRGPIO_REG) & 0x100) ? 1 : 0; |
| 56 | led_state += (ADM8668_WLAN_REG(GPIO_REG) & 0x40) ? 2 : 0; |
| 57 | len += sprintf(buf+len, "%s\n", |
| 58 | (led_state&1) ? |
| 59 | ((led_state&2) ? "ORANGE" : "GREEN") : "OFF"); |
| 60 | |
| 61 | return len; |
| 62 | } |
| 63 | |
| 64 | int adm8668_button_read_proc(char *buf, char **start, off_t offset, |
| 65 | int count, int *eof, void *data) |
| 66 | { |
| 67 | int len = 0; |
| 68 | int read_once = ADM8668_CONFIG_REG(CRGPIO_REG); |
| 69 | int button_flip = (read_once >> 20) & 0x3; |
| 70 | int button_state = read_once & 0x3; |
| 71 | |
| 72 | len += sprintf(buf+len, "SES: %s %s\nRESET: %s %s\n", |
| 73 | (button_state&2) ? "UP" : "DOWN", |
| 74 | (button_flip&2) ? "FLIP" : "", |
| 75 | (button_state&1) ? "UP" : "DOWN", |
| 76 | (button_flip&1) ? "FLIP" : ""); |
| 77 | |
| 78 | return len; |
| 79 | } |
| 80 | |
| 81 | int __init adm8668_init_proc(void) |
| 82 | { |
| 83 | struct proc_dir_entry *adm8668_proc_dir = NULL; |
| 84 | struct proc_dir_entry *sesled = NULL; |
| 85 | int __maybe_unused bogus; |
| 86 | |
| 87 | /* these are known to be lights. rest are input...? */ |
| 88 | ADM8668_CONFIG_REG(CRGPIO_REG) = GPIO2_OUTPUT_ENABLE; |
| 89 | ADM8668_WLAN_REG(GPIO_REG) = GPIO0_OUTPUT_ENABLE; |
| 90 | |
| 91 | /* inital read off of the flipper switcher on the button thingie */ |
| 92 | bogus = ADM8668_CONFIG_REG(CRGPIO_REG); |
| 93 | |
| 94 | adm8668_proc_dir = proc_mkdir("adm8668", 0); |
| 95 | if (adm8668_proc_dir == NULL) { |
| 96 | printk(KERN_ERR "ADM8668 proc: unable to create proc dir.\n"); |
| 97 | return 0; |
| 98 | } |
| 99 | create_proc_read_entry("buttons", 0444, adm8668_proc_dir, |
| 100 | adm8668_button_read_proc, NULL); |
| 101 | sesled = create_proc_entry("sesled", S_IRUGO|S_IWUGO, adm8668_proc_dir); |
| 102 | if (sesled) { |
| 103 | sesled->read_proc = adm8668_sesled_read_proc; |
| 104 | sesled->write_proc = adm8668_sesled_write_proc; |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | module_init(adm8668_init_proc); |
| 111 | |
| 112 | MODULE_LICENSE("GPL"); |
| 113 | MODULE_AUTHOR("Scott Nicholas <neutronscott@scottn.us>"); |
| 114 | MODULE_DESCRIPTION("ADM8668 ghetto button driver"); |
| 115 | |
