source: freewrt/package/broadcom-diag/diag.h@ 727dae0d

/*
 * diag.h - GPIO interface driver for Broadcom boards
 *
 * Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
 *                    Felix Fietkau <nbd@openwrt.org>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Id:$
 */

#include <linux/irq.h>
#define MODULE_NAME "diag"

#define MAX_GPIO 8
#define FLASH_TIME HZ/6

enum polarity_t {
        REVERSE = 0,
        NORMAL = 1,
};

enum {
        PROC_BUTTON,
        PROC_LED,
        PROC_MODEL,
        PROC_GPIOMASK
};

struct prochandler_t {
        int type;
        void *ptr;
};

struct button_t {
        struct prochandler_t proc;
        char *name;
        u32 gpio;
        unsigned long seen;
        u8 pressed;
};

struct led_t {
        struct prochandler_t proc;
        char *name;
        u32 gpio;
        u8 polarity;
        u8 flash;
        u8 state;
};

struct platform_t {
        char *name;

        struct button_t buttons[MAX_GPIO];
        u32 button_mask;
        u32 button_polarity;
        void (*platform_init)(void);

        struct led_t leds[MAX_GPIO];
};

struct event_t {
        struct work_struct wq;
        char buf[256];
        char *argv[3];
        char *envp[6];
};

extern char *nvram_get(char *str);

static struct platform_t platform;

/* buttons */

static void register_buttons(struct button_t *b);
static void unregister_buttons(struct button_t *b);

static void hotplug_button(struct event_t *event);
static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs);

/* leds */

static void register_leds(struct led_t *l);
static void unregister_leds(struct led_t *l);

static void set_led_extif(struct led_t *led);
static void led_flash(unsigned long dummy);

/* 2.4 compatibility */
#ifndef TIMER_INITIALIZER
#define TIMER_INITIALIZER(_function, _expires, _data) \
        { \
                /* _expires and _data currently unused */ \
                function: _function \
        }
#endif

static struct timer_list led_timer = TIMER_INITIALIZER(&led_flash, 0, 0);

/* proc */

static struct proc_dir_entry *diag, *leds;

static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, loff_t *ppos);

static struct file_operations diag_proc_fops = {
        read: diag_proc_read,
        write: diag_proc_write
};

static struct prochandler_t proc_model = { .type = PROC_MODEL };
static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };