127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
/*
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* diag.h - GPIO interface driver for Broadcom boards
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*
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* Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
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* Felix Fietkau <nbd@openwrt.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Id:$
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*/
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#include <linux/irq.h>
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#define MODULE_NAME "diag"
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#define MAX_GPIO 8
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#define FLASH_TIME HZ/6
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enum polarity_t {
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REVERSE = 0,
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NORMAL = 1,
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};
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enum {
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PROC_BUTTON,
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PROC_LED,
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PROC_MODEL,
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PROC_GPIOMASK
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};
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struct prochandler_t {
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int type;
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void *ptr;
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};
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struct button_t {
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struct prochandler_t proc;
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char *name;
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u32 gpio;
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unsigned long seen;
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u8 pressed;
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};
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struct led_t {
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struct prochandler_t proc;
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char *name;
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u32 gpio;
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u8 polarity;
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u8 flash;
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u8 state;
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};
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struct platform_t {
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char *name;
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struct button_t buttons[MAX_GPIO];
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u32 button_mask;
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u32 button_polarity;
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void (*platform_init)(void);
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struct led_t leds[MAX_GPIO];
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};
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struct event_t {
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struct work_struct wq;
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char buf[256];
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char *argv[3];
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char *envp[6];
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};
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extern char *nvram_get(char *str);
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static struct platform_t platform;
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/* buttons */
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static void register_buttons(struct button_t *b);
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static void unregister_buttons(struct button_t *b);
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static void hotplug_button(struct event_t *event);
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static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs);
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/* leds */
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static void register_leds(struct led_t *l);
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static void unregister_leds(struct led_t *l);
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static void set_led_extif(struct led_t *led);
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static void led_flash(unsigned long dummy);
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/* 2.4 compatibility */
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#ifndef TIMER_INITIALIZER
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#define TIMER_INITIALIZER(_function, _expires, _data) \
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{ \
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/* _expires and _data currently unused */ \
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function: _function \
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}
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#endif
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static struct timer_list led_timer = TIMER_INITIALIZER(&led_flash, 0, 0);
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/* proc */
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static struct proc_dir_entry *diag, *leds;
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static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
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static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, loff_t *ppos);
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static struct file_operations diag_proc_fops = {
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read: diag_proc_read,
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write: diag_proc_write
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};
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static struct prochandler_t proc_model = { .type = PROC_MODEL };
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static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };
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