package/broadcom-diag/src/diag.h

   1 /*
   2  * diag.h - GPIO interface driver for Broadcom boards
   3  *
   4  * Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
   5  *                    Felix Fietkau <nbd@openwrt.org>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  * $Id:$
  22  */
  23
  24 #define MODULE_NAME "diag"
  25
  26 #define MAX_GPIO 8
  27 #define FLASH_TIME HZ/6
  28
  29 enum polarity_t {
  30         REVERSE = 0,
  31         NORMAL = 1,
  32 };
  33
  34 enum {
  35         PROC_BUTTON,
  36         PROC_LED,
  37         PROC_MODEL,
  38         PROC_GPIOMASK
  39 };
  40
  41 struct prochandler_t {
  42         int type;
  43         void *ptr;
  44 };
  45
  46 struct button_t {
  47         struct prochandler_t proc;
  48         char *name;
  49         u32 gpio;
  50         unsigned long seen;
  51         u8 pressed;
  52 };
  53
  54 struct led_t {
  55         struct prochandler_t proc;
  56         char *name;
  57         u32 gpio;
  58         u8 polarity;
  59         u8 flash;
  60         u8 state;
  61 };
  62
  63 struct platform_t {
  64         char *name;
  65
  66         struct button_t buttons[MAX_GPIO];
  67         u32 button_mask;
  68         u32 button_polarity;
  69         void (*platform_init)(void);
  70
  71         struct led_t leds[MAX_GPIO];
  72 };
  73
  74 struct event_t {
  75         struct work_struct wq;
  76         char buf[256];
  77         char *argv[3];
  78         char *envp[6];
  79 };
  80
  81 extern char *nvram_get(char *str);
  82
  83 static struct platform_t platform;
  84
  85 /* buttons */
  86
  87 static void register_buttons(struct button_t *b);
  88 static void unregister_buttons(struct button_t *b);
  89
  90 static void hotplug_button(struct event_t *event);
  91 static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs);
  92
  93 /* leds */
  94
  95 static void register_leds(struct led_t *l);
  96 static void unregister_leds(struct led_t *l);
  97
  98 static void set_led_extif(struct led_t *led);
  99 static void led_flash(unsigned long dummy);
 100
 101 /* 2.4 compatibility */
 102 #ifndef TIMER_INITIALIZER
 103 #define TIMER_INITIALIZER(_function, _expires, _data) \
 104         { \
 105                 /* _expires and _data currently unused */ \
 106                 function: _function \
 107         }
 108 #endif
 109
 110 static struct timer_list led_timer = TIMER_INITIALIZER(&led_flash, 0, 0);
 111
 112 /* proc */
 113
 114 static struct proc_dir_entry *diag, *leds;
 115
 116 static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
 117 static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, loff_t *ppos);
 118
 119 static struct file_operations diag_proc_fops = {
 120         read: diag_proc_read,
 121         write: diag_proc_write
 122 };
 123
 124 static struct prochandler_t proc_model = { .type = PROC_MODEL };
 125 static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };
 126