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 #include <linux/irq.h>
  25 #define MODULE_NAME "diag"
  26
  27 #define MAX_GPIO 8
  28 #define FLASH_TIME HZ/6
  29
  30 enum polarity_t {
  31         REVERSE = 0,
  32         NORMAL = 1,
  33 };
  34
  35 enum {
  36         PROC_BUTTON,
  37         PROC_LED,
  38         PROC_MODEL,
  39         PROC_GPIOMASK
  40 };
  41
  42 struct prochandler_t {
  43         int type;
  44         void *ptr;
  45 };
  46
  47 struct button_t {
  48         struct prochandler_t proc;
  49         char *name;
  50         u32 gpio;
  51         unsigned long seen;
  52         u8 pressed;
  53 };
  54
  55 struct led_t {
  56         struct prochandler_t proc;
  57         char *name;
  58         u32 gpio;
  59         u8 polarity;
  60         u8 flash;
  61         u8 state;
  62 };
  63
  64 struct platform_t {
  65         char *name;
  66
  67         struct button_t buttons[MAX_GPIO];
  68         u32 button_mask;
  69         u32 button_polarity;
  70         void (*platform_init)(void);
  71
  72         struct led_t leds[MAX_GPIO];
  73 };
  74
  75 struct event_t {
  76         struct work_struct wq;
  77         char buf[256];
  78         char *argv[3];
  79         char *envp[6];
  80 };
  81
  82 extern char *nvram_get(char *str);
  83
  84 static struct platform_t platform;
  85
  86 /* buttons */
  87
  88 static void register_buttons(struct button_t *b);
  89 static void unregister_buttons(struct button_t *b);
  90
  91 static void hotplug_button(struct event_t *event);
  92 static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs);
  93
  94 /* leds */
  95
  96 static void register_leds(struct led_t *l);
  97 static void unregister_leds(struct led_t *l);
  98
  99 static void set_led_extif(struct led_t *led);
 100 static void led_flash(unsigned long dummy);
 101
 102 /* 2.4 compatibility */
 103 #ifndef TIMER_INITIALIZER
 104 #define TIMER_INITIALIZER(_function, _expires, _data) \
 105         { \
 106                 /* _expires and _data currently unused */ \
 107                 function: _function \
 108         }
 109 #endif
 110
 111 static struct timer_list led_timer = TIMER_INITIALIZER(&led_flash, 0, 0);
 112
 113 /* proc */
 114
 115 static struct proc_dir_entry *diag, *leds;
 116
 117 static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
 118 static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, loff_t *ppos);
 119
 120 static struct file_operations diag_proc_fops = {
 121         read: diag_proc_read,
 122         write: diag_proc_write
 123 };
 124
 125 static struct prochandler_t proc_model = { .type = PROC_MODEL };
 126 static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };
 127