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/*
* 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,
INPUT = 2,
};
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;
unsigned long seen;
char *name, *action;
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
struct sk_buff *skb;
#else
char *scratch;
char *argv[4];
char *envp[7];
u8 enr, anr;
#endif
};
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);
#ifndef LINUX_2_4
static void hotplug_button(struct work_struct *work);
static irqreturn_t button_handler(int irq, void *dev_id);
#else
static void hotplug_button(struct event_t *event);
static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs);
#endif
/* 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 };
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