| 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 | */ |
| 22 | |
| 23 | #include <linux/irq.h> |
| 24 | #define MODULE_NAME "diag" |
| 25 | |
| 26 | #define MAX_GPIO 16 |
| 27 | #define FLASH_TIME HZ/6 |
| 28 | |
| 29 | enum polarity_t { |
| 30 | REVERSE = 0, |
| 31 | NORMAL = 1, |
| 32 | INPUT = 2, |
| 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 | unsigned long seen; |
| 78 | char *name, *action; |
| 79 | #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0) |
| 80 | struct sk_buff *skb; |
| 81 | #else |
| 82 | char *scratch; |
| 83 | char *argv[4]; |
| 84 | char *envp[7]; |
| 85 | u8 enr, anr; |
| 86 | #endif |
| 87 | }; |
| 88 | |
| 89 | extern char *nvram_get(char *str); |
| 90 | |
| 91 | static struct platform_t platform; |
| 92 | |
| 93 | /* buttons */ |
| 94 | |
| 95 | static void register_buttons(struct button_t *b); |
| 96 | static void unregister_buttons(struct button_t *b); |
| 97 | |
| 98 | #ifndef LINUX_2_4 |
| 99 | static void hotplug_button(struct work_struct *work); |
| 100 | static irqreturn_t button_handler(int irq, void *dev_id); |
| 101 | #else |
| 102 | static void hotplug_button(struct event_t *event); |
| 103 | static irqreturn_t button_handler(int irq, void *dev_id, struct pt_regs *regs); |
| 104 | #endif |
| 105 | |
| 106 | /* leds */ |
| 107 | |
| 108 | static void register_leds(struct led_t *l); |
| 109 | static void unregister_leds(struct led_t *l); |
| 110 | |
| 111 | static void set_led_extif(struct led_t *led); |
| 112 | static void led_flash(unsigned long dummy); |
| 113 | |
| 114 | /* 2.4 compatibility */ |
| 115 | #ifndef TIMER_INITIALIZER |
| 116 | #define TIMER_INITIALIZER(_function, _expires, _data) \ |
| 117 | { \ |
| 118 | /* _expires and _data currently unused */ \ |
| 119 | function: _function \ |
| 120 | } |
| 121 | #endif |
| 122 | |
| 123 | static struct timer_list led_timer = TIMER_INITIALIZER(&led_flash, 0, 0); |
| 124 | |
| 125 | /* proc */ |
| 126 | |
| 127 | static struct proc_dir_entry *diag, *leds; |
| 128 | |
| 129 | static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos); |
| 130 | static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, loff_t *ppos); |
| 131 | |
| 132 | static struct file_operations diag_proc_fops = { |
| 133 | read: diag_proc_read, |
| 134 | write: diag_proc_write |
| 135 | }; |
| 136 | |
| 137 | static struct prochandler_t proc_model = { .type = PROC_MODEL }; |
| 138 | static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK }; |
| 139 | |
| 140 | |
