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 16
  28 #define FLASH_TIME HZ/6
  29
  30 enum polarity_t {
  31         REVERSE = 0,
  32         NORMAL = 1,
  33         INPUT = 2,
  34 };
  35
  36 enum {
  37         PROC_BUTTON,
  38         PROC_LED,
  39         PROC_MODEL,
  40         PROC_GPIOMASK
  41 };
  42
  43 struct prochandler_t {
  44         int type;
  45         void *ptr;
  46 };
  47
  48 struct button_t {
  49         struct prochandler_t proc;
  50         char *name;
  51         u32 gpio;
  52         unsigned long seen;
  53         u8 pressed;
  54 };
  55
  56 struct led_t {
  57         struct prochandler_t proc;
  58         char *name;
  59         u32 gpio;
  60         u8 polarity;
  61         u8 flash;
  62         u8 state;
  63 };
  64
  65 struct platform_t {
  66         char *name;
  67
  68         struct button_t buttons[MAX_GPIO];
  69         u32 button_mask;
  70         u32 button_polarity;
  71         void (*platform_init)(void);
  72
  73         struct led_t leds[MAX_GPIO];
  74 };
  75
  76 struct event_t {
  77         struct work_struct wq;
  78         unsigned long seen;
  79         char *name, *action;
  80 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
  81         struct sk_buff *skb;
  82 #else
  83         char *scratch;
  84         char *argv[4];
  85         char *envp[7];
  86         u8 enr, anr;
  87 #endif
  88 };
  89
  90 extern char *nvram_get(char *str);
  91
  92 static struct platform_t platform;
  93
  94 /* buttons */
  95
  96 static void register_buttons(struct button_t *b);
  97 static void unregister_buttons(struct button_t *b);
  98
  99 #ifndef LINUX_2_4
 100 static void hotplug_button(struct work_struct *work);
 101 static irqreturn_t button_handler(int irq, void *dev_id);
 102 #else
 103 static void hotplug_button(struct event_t *event);
 104 static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs);
 105 #endif
 106
 107 /* leds */
 108
 109 static void register_leds(struct led_t *l);
 110 static void unregister_leds(struct led_t *l);
 111
 112 static void set_led_extif(struct led_t *led);
 113 static void led_flash(unsigned long dummy);
 114
 115 /* 2.4 compatibility */
 116 #ifndef TIMER_INITIALIZER
 117 #define TIMER_INITIALIZER(_function, _expires, _data) \
 118         { \
 119                 /* _expires and _data currently unused */ \
 120                 function: _function \
 121         }
 122 #endif
 123
 124 static struct timer_list led_timer = TIMER_INITIALIZER(&led_flash, 0, 0);
 125
 126 /* proc */
 127
 128 static struct proc_dir_entry *diag, *leds;
 129
 130 static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
 131 static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, loff_t *ppos);
 132
 133 static struct file_operations diag_proc_fops = {
 134         read: diag_proc_read,
 135         write: diag_proc_write
 136 };
 137
 138 static struct prochandler_t proc_model = { .type = PROC_MODEL };
 139 static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };
 140