Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Input driver to ExplorerPS/2 device driver module. |
| 3 | * |
| 4 | * Copyright (c) 1999-2002 Vojtech Pavlik |
| 5 | * Copyright (c) 2004 Dmitry Torokhov |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as published by |
| 9 | * the Free Software Foundation. |
| 10 | */ |
| 11 | |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame^] | 12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 13 | |
Dmitry Torokhov | 4f00469 | 2005-09-15 02:01:38 -0500 | [diff] [blame] | 14 | #define MOUSEDEV_MINOR_BASE 32 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #define MOUSEDEV_MINORS 32 |
| 16 | #define MOUSEDEV_MIX 31 |
| 17 | |
Alexey Dobriyan | a99bbaf | 2009-10-04 16:11:37 +0400 | [diff] [blame] | 18 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/slab.h> |
| 20 | #include <linux/poll.h> |
| 21 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/init.h> |
| 23 | #include <linux/input.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/random.h> |
| 25 | #include <linux/major.h> |
| 26 | #include <linux/device.h> |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 27 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
| 29 | #include <linux/miscdevice.h> |
| 30 | #endif |
| 31 | |
| 32 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| 33 | MODULE_DESCRIPTION("Mouse (ExplorerPS/2) device interfaces"); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
| 36 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_X |
| 37 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_X 1024 |
| 38 | #endif |
| 39 | #ifndef CONFIG_INPUT_MOUSEDEV_SCREEN_Y |
| 40 | #define CONFIG_INPUT_MOUSEDEV_SCREEN_Y 768 |
| 41 | #endif |
| 42 | |
| 43 | static int xres = CONFIG_INPUT_MOUSEDEV_SCREEN_X; |
Dmitry Torokhov | 84c12b2 | 2005-12-11 12:41:03 -0500 | [diff] [blame] | 44 | module_param(xres, uint, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | MODULE_PARM_DESC(xres, "Horizontal screen resolution"); |
| 46 | |
| 47 | static int yres = CONFIG_INPUT_MOUSEDEV_SCREEN_Y; |
Dmitry Torokhov | 84c12b2 | 2005-12-11 12:41:03 -0500 | [diff] [blame] | 48 | module_param(yres, uint, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | MODULE_PARM_DESC(yres, "Vertical screen resolution"); |
| 50 | |
| 51 | static unsigned tap_time = 200; |
Dmitry Torokhov | 84c12b2 | 2005-12-11 12:41:03 -0500 | [diff] [blame] | 52 | module_param(tap_time, uint, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | MODULE_PARM_DESC(tap_time, "Tap time for touchpads in absolute mode (msecs)"); |
| 54 | |
| 55 | struct mousedev_hw_data { |
| 56 | int dx, dy, dz; |
| 57 | int x, y; |
| 58 | int abs_event; |
| 59 | unsigned long buttons; |
| 60 | }; |
| 61 | |
| 62 | struct mousedev { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | int open; |
| 64 | int minor; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 65 | struct input_handle handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | wait_queue_head_t wait; |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 67 | struct list_head client_list; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 68 | spinlock_t client_lock; /* protects client_list */ |
| 69 | struct mutex mutex; |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 70 | struct device dev; |
Dmitry Torokhov | 20da92d | 2010-07-15 23:27:36 -0700 | [diff] [blame] | 71 | bool exist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 73 | struct list_head mixdev_node; |
| 74 | int mixdev_open; |
| 75 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | struct mousedev_hw_data packet; |
| 77 | unsigned int pkt_count; |
| 78 | int old_x[4], old_y[4]; |
| 79 | int frac_dx, frac_dy; |
| 80 | unsigned long touch; |
| 81 | }; |
| 82 | |
| 83 | enum mousedev_emul { |
| 84 | MOUSEDEV_EMUL_PS2, |
| 85 | MOUSEDEV_EMUL_IMPS, |
| 86 | MOUSEDEV_EMUL_EXPS |
| 87 | }; |
| 88 | |
| 89 | struct mousedev_motion { |
| 90 | int dx, dy, dz; |
| 91 | unsigned long buttons; |
| 92 | }; |
| 93 | |
| 94 | #define PACKET_QUEUE_LEN 16 |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 95 | struct mousedev_client { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | struct fasync_struct *fasync; |
| 97 | struct mousedev *mousedev; |
| 98 | struct list_head node; |
| 99 | |
| 100 | struct mousedev_motion packets[PACKET_QUEUE_LEN]; |
| 101 | unsigned int head, tail; |
| 102 | spinlock_t packet_lock; |
| 103 | int pos_x, pos_y; |
| 104 | |
| 105 | signed char ps2[6]; |
| 106 | unsigned char ready, buffer, bufsiz; |
| 107 | unsigned char imexseq, impsseq; |
| 108 | enum mousedev_emul mode; |
Pavel Machek | c1e4c8d | 2005-05-27 12:53:03 -0700 | [diff] [blame] | 109 | unsigned long last_buttons; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | }; |
| 111 | |
| 112 | #define MOUSEDEV_SEQ_LEN 6 |
| 113 | |
| 114 | static unsigned char mousedev_imps_seq[] = { 0xf3, 200, 0xf3, 100, 0xf3, 80 }; |
| 115 | static unsigned char mousedev_imex_seq[] = { 0xf3, 200, 0xf3, 200, 0xf3, 80 }; |
| 116 | |
| 117 | static struct input_handler mousedev_handler; |
| 118 | |
| 119 | static struct mousedev *mousedev_table[MOUSEDEV_MINORS]; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 120 | static DEFINE_MUTEX(mousedev_table_mutex); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 121 | static struct mousedev *mousedev_mix; |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 122 | static LIST_HEAD(mousedev_mix_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 124 | static void mixdev_open_devices(void); |
| 125 | static void mixdev_close_devices(void); |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | #define fx(i) (mousedev->old_x[(mousedev->pkt_count - (i)) & 03]) |
| 128 | #define fy(i) (mousedev->old_y[(mousedev->pkt_count - (i)) & 03]) |
| 129 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 130 | static void mousedev_touchpad_event(struct input_dev *dev, |
| 131 | struct mousedev *mousedev, |
| 132 | unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
| 134 | int size, tmp; |
| 135 | enum { FRACTION_DENOM = 128 }; |
| 136 | |
Dmitry Torokhov | 0d9d93c | 2007-04-12 01:31:55 -0400 | [diff] [blame] | 137 | switch (code) { |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 138 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 139 | case ABS_X: |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 140 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 141 | fx(0) = value; |
| 142 | if (mousedev->touch && mousedev->pkt_count >= 2) { |
Christoph Fritz | 268ba5c | 2010-08-24 00:33:37 -0700 | [diff] [blame] | 143 | size = input_abs_get_max(dev, ABS_X) - |
| 144 | input_abs_get_min(dev, ABS_X); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 145 | if (size == 0) |
| 146 | size = 256 * 2; |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 147 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 148 | tmp = ((value - fx(2)) * 256 * FRACTION_DENOM) / size; |
| 149 | tmp += mousedev->frac_dx; |
| 150 | mousedev->packet.dx = tmp / FRACTION_DENOM; |
| 151 | mousedev->frac_dx = |
| 152 | tmp - mousedev->packet.dx * FRACTION_DENOM; |
| 153 | } |
| 154 | break; |
| 155 | |
| 156 | case ABS_Y: |
| 157 | fy(0) = value; |
| 158 | if (mousedev->touch && mousedev->pkt_count >= 2) { |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 159 | /* use X size for ABS_Y to keep the same scale */ |
Christoph Fritz | 268ba5c | 2010-08-24 00:33:37 -0700 | [diff] [blame] | 160 | size = input_abs_get_max(dev, ABS_X) - |
| 161 | input_abs_get_min(dev, ABS_X); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 162 | if (size == 0) |
| 163 | size = 256 * 2; |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 164 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 165 | tmp = -((value - fy(2)) * 256 * FRACTION_DENOM) / size; |
| 166 | tmp += mousedev->frac_dy; |
| 167 | mousedev->packet.dy = tmp / FRACTION_DENOM; |
| 168 | mousedev->frac_dy = tmp - |
| 169 | mousedev->packet.dy * FRACTION_DENOM; |
| 170 | } |
| 171 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | } |
| 174 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 175 | static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev, |
| 176 | unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 178 | int min, max, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | switch (code) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 182 | case ABS_X: |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 183 | min = input_abs_get_min(dev, ABS_X); |
| 184 | max = input_abs_get_max(dev, ABS_X); |
| 185 | |
| 186 | size = max - min; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 187 | if (size == 0) |
| 188 | size = xres ? : 1; |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 189 | |
| 190 | clamp(value, min, max); |
| 191 | |
| 192 | mousedev->packet.x = ((value - min) * xres) / size; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 193 | mousedev->packet.abs_event = 1; |
| 194 | break; |
| 195 | |
| 196 | case ABS_Y: |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 197 | min = input_abs_get_min(dev, ABS_Y); |
| 198 | max = input_abs_get_max(dev, ABS_Y); |
| 199 | |
| 200 | size = max - min; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 201 | if (size == 0) |
| 202 | size = yres ? : 1; |
Daniel Mack | 987a6c0 | 2010-08-02 20:15:17 -0700 | [diff] [blame] | 203 | |
| 204 | clamp(value, min, max); |
| 205 | |
| 206 | mousedev->packet.y = yres - ((value - min) * yres) / size; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 207 | mousedev->packet.abs_event = 1; |
| 208 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | } |
| 211 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 212 | static void mousedev_rel_event(struct mousedev *mousedev, |
| 213 | unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
| 215 | switch (code) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 216 | case REL_X: |
| 217 | mousedev->packet.dx += value; |
| 218 | break; |
| 219 | |
| 220 | case REL_Y: |
| 221 | mousedev->packet.dy -= value; |
| 222 | break; |
| 223 | |
| 224 | case REL_WHEEL: |
| 225 | mousedev->packet.dz -= value; |
| 226 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | } |
| 228 | } |
| 229 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 230 | static void mousedev_key_event(struct mousedev *mousedev, |
| 231 | unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
| 233 | int index; |
| 234 | |
| 235 | switch (code) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 236 | |
| 237 | case BTN_TOUCH: |
| 238 | case BTN_0: |
| 239 | case BTN_LEFT: index = 0; break; |
| 240 | |
| 241 | case BTN_STYLUS: |
| 242 | case BTN_1: |
| 243 | case BTN_RIGHT: index = 1; break; |
| 244 | |
| 245 | case BTN_2: |
| 246 | case BTN_FORWARD: |
| 247 | case BTN_STYLUS2: |
| 248 | case BTN_MIDDLE: index = 2; break; |
| 249 | |
| 250 | case BTN_3: |
| 251 | case BTN_BACK: |
| 252 | case BTN_SIDE: index = 3; break; |
| 253 | |
| 254 | case BTN_4: |
| 255 | case BTN_EXTRA: index = 4; break; |
| 256 | |
| 257 | default: return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
| 260 | if (value) { |
| 261 | set_bit(index, &mousedev->packet.buttons); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 262 | set_bit(index, &mousedev_mix->packet.buttons); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | } else { |
| 264 | clear_bit(index, &mousedev->packet.buttons); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 265 | clear_bit(index, &mousedev_mix->packet.buttons); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | } |
| 267 | } |
| 268 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 269 | static void mousedev_notify_readers(struct mousedev *mousedev, |
| 270 | struct mousedev_hw_data *packet) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 272 | struct mousedev_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | struct mousedev_motion *p; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 274 | unsigned int new_head; |
Dmitry Torokhov | 8121152 | 2005-06-01 02:39:36 -0500 | [diff] [blame] | 275 | int wake_readers = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 277 | rcu_read_lock(); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 278 | list_for_each_entry_rcu(client, &mousedev->client_list, node) { |
| 279 | |
| 280 | /* Just acquire the lock, interrupts already disabled */ |
| 281 | spin_lock(&client->packet_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 283 | p = &client->packets[client->head]; |
| 284 | if (client->ready && p->buttons != mousedev->packet.buttons) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 285 | new_head = (client->head + 1) % PACKET_QUEUE_LEN; |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 286 | if (new_head != client->tail) { |
| 287 | p = &client->packets[client->head = new_head]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | memset(p, 0, sizeof(struct mousedev_motion)); |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | if (packet->abs_event) { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 293 | p->dx += packet->x - client->pos_x; |
| 294 | p->dy += packet->y - client->pos_y; |
| 295 | client->pos_x = packet->x; |
| 296 | client->pos_y = packet->y; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 299 | client->pos_x += packet->dx; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 300 | client->pos_x = client->pos_x < 0 ? |
| 301 | 0 : (client->pos_x >= xres ? xres : client->pos_x); |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 302 | client->pos_y += packet->dy; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 303 | client->pos_y = client->pos_y < 0 ? |
| 304 | 0 : (client->pos_y >= yres ? yres : client->pos_y); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | p->dx += packet->dx; |
| 307 | p->dy += packet->dy; |
| 308 | p->dz += packet->dz; |
| 309 | p->buttons = mousedev->packet.buttons; |
| 310 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 311 | if (p->dx || p->dy || p->dz || |
| 312 | p->buttons != client->last_buttons) |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 313 | client->ready = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 315 | spin_unlock(&client->packet_lock); |
Pavel Machek | c1e4c8d | 2005-05-27 12:53:03 -0700 | [diff] [blame] | 316 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 317 | if (client->ready) { |
| 318 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
Dmitry Torokhov | 8121152 | 2005-06-01 02:39:36 -0500 | [diff] [blame] | 319 | wake_readers = 1; |
| 320 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | } |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 322 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
Dmitry Torokhov | 8121152 | 2005-06-01 02:39:36 -0500 | [diff] [blame] | 324 | if (wake_readers) |
| 325 | wake_up_interruptible(&mousedev->wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | static void mousedev_touchpad_touch(struct mousedev *mousedev, int value) |
| 329 | { |
| 330 | if (!value) { |
| 331 | if (mousedev->touch && |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 332 | time_before(jiffies, |
| 333 | mousedev->touch + msecs_to_jiffies(tap_time))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | /* |
| 335 | * Toggle left button to emulate tap. |
| 336 | * We rely on the fact that mousedev_mix always has 0 |
| 337 | * motion packet so we won't mess current position. |
| 338 | */ |
| 339 | set_bit(0, &mousedev->packet.buttons); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 340 | set_bit(0, &mousedev_mix->packet.buttons); |
| 341 | mousedev_notify_readers(mousedev, &mousedev_mix->packet); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 342 | mousedev_notify_readers(mousedev_mix, |
| 343 | &mousedev_mix->packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | clear_bit(0, &mousedev->packet.buttons); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 345 | clear_bit(0, &mousedev_mix->packet.buttons); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | mousedev->touch = mousedev->pkt_count = 0; |
| 348 | mousedev->frac_dx = 0; |
| 349 | mousedev->frac_dy = 0; |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 350 | |
| 351 | } else if (!mousedev->touch) |
| 352 | mousedev->touch = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | } |
| 354 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 355 | static void mousedev_event(struct input_handle *handle, |
| 356 | unsigned int type, unsigned int code, int value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
| 358 | struct mousedev *mousedev = handle->private; |
| 359 | |
| 360 | switch (type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 362 | case EV_ABS: |
| 363 | /* Ignore joysticks */ |
| 364 | if (test_bit(BTN_TRIGGER, handle->dev->keybit)) |
| 365 | return; |
| 366 | |
| 367 | if (test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
| 368 | mousedev_touchpad_event(handle->dev, |
| 369 | mousedev, code, value); |
| 370 | else |
| 371 | mousedev_abs_event(handle->dev, mousedev, code, value); |
| 372 | |
| 373 | break; |
| 374 | |
| 375 | case EV_REL: |
| 376 | mousedev_rel_event(mousedev, code, value); |
| 377 | break; |
| 378 | |
| 379 | case EV_KEY: |
| 380 | if (value != 2) { |
| 381 | if (code == BTN_TOUCH && |
| 382 | test_bit(BTN_TOOL_FINGER, handle->dev->keybit)) |
| 383 | mousedev_touchpad_touch(mousedev, value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | else |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 385 | mousedev_key_event(mousedev, code, value); |
| 386 | } |
| 387 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 389 | case EV_SYN: |
| 390 | if (code == SYN_REPORT) { |
| 391 | if (mousedev->touch) { |
| 392 | mousedev->pkt_count++; |
| 393 | /* |
| 394 | * Input system eats duplicate events, |
| 395 | * but we need all of them to do correct |
| 396 | * averaging so apply present one forward |
| 397 | */ |
| 398 | fx(0) = fx(1); |
| 399 | fy(0) = fy(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 402 | mousedev_notify_readers(mousedev, &mousedev->packet); |
| 403 | mousedev_notify_readers(mousedev_mix, &mousedev->packet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 405 | mousedev->packet.dx = mousedev->packet.dy = |
| 406 | mousedev->packet.dz = 0; |
| 407 | mousedev->packet.abs_event = 0; |
| 408 | } |
| 409 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | } |
| 412 | |
| 413 | static int mousedev_fasync(int fd, struct file *file, int on) |
| 414 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 415 | struct mousedev_client *client = file->private_data; |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 416 | |
Jonathan Corbet | 60aa492 | 2009-02-01 14:52:56 -0700 | [diff] [blame] | 417 | return fasync_helper(fd, file, on, &client->fasync); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 420 | static void mousedev_free(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 422 | struct mousedev *mousedev = container_of(dev, struct mousedev, dev); |
| 423 | |
Dmitry Torokhov | a7097ff | 2008-04-01 00:22:53 -0400 | [diff] [blame] | 424 | input_put_device(mousedev->handle.dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | kfree(mousedev); |
| 426 | } |
| 427 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 428 | static int mousedev_open_device(struct mousedev *mousedev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 430 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 432 | retval = mutex_lock_interruptible(&mousedev->mutex); |
| 433 | if (retval) |
| 434 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 436 | if (mousedev->minor == MOUSEDEV_MIX) |
| 437 | mixdev_open_devices(); |
| 438 | else if (!mousedev->exist) |
| 439 | retval = -ENODEV; |
Oliver Neukum | 0644501 | 2007-10-12 14:18:40 -0400 | [diff] [blame] | 440 | else if (!mousedev->open++) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 441 | retval = input_open_device(&mousedev->handle); |
Oliver Neukum | 0644501 | 2007-10-12 14:18:40 -0400 | [diff] [blame] | 442 | if (retval) |
| 443 | mousedev->open--; |
| 444 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 446 | mutex_unlock(&mousedev->mutex); |
| 447 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 450 | static void mousedev_close_device(struct mousedev *mousedev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 452 | mutex_lock(&mousedev->mutex); |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 453 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 454 | if (mousedev->minor == MOUSEDEV_MIX) |
| 455 | mixdev_close_devices(); |
| 456 | else if (mousedev->exist && !--mousedev->open) |
| 457 | input_close_device(&mousedev->handle); |
| 458 | |
| 459 | mutex_unlock(&mousedev->mutex); |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 460 | } |
| 461 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 462 | /* |
| 463 | * Open all available devices so they can all be multiplexed in one. |
| 464 | * stream. Note that this function is called with mousedev_mix->mutex |
| 465 | * held. |
| 466 | */ |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 467 | static void mixdev_open_devices(void) |
| 468 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | struct mousedev *mousedev; |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 470 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 471 | if (mousedev_mix->open++) |
| 472 | return; |
| 473 | |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 474 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 475 | if (!mousedev->mixdev_open) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 476 | if (mousedev_open_device(mousedev)) |
| 477 | continue; |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 478 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 479 | mousedev->mixdev_open = 1; |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 480 | } |
| 481 | } |
| 482 | } |
| 483 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 484 | /* |
| 485 | * Close all devices that were opened as part of multiplexed |
| 486 | * device. Note that this function is called with mousedev_mix->mutex |
| 487 | * held. |
| 488 | */ |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 489 | static void mixdev_close_devices(void) |
| 490 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 491 | struct mousedev *mousedev; |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 492 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 493 | if (--mousedev_mix->open) |
| 494 | return; |
| 495 | |
| 496 | list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) { |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 497 | if (mousedev->mixdev_open) { |
| 498 | mousedev->mixdev_open = 0; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 499 | mousedev_close_device(mousedev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | } |
| 501 | } |
| 502 | } |
| 503 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 504 | |
| 505 | static void mousedev_attach_client(struct mousedev *mousedev, |
| 506 | struct mousedev_client *client) |
| 507 | { |
| 508 | spin_lock(&mousedev->client_lock); |
| 509 | list_add_tail_rcu(&client->node, &mousedev->client_list); |
| 510 | spin_unlock(&mousedev->client_lock); |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 511 | synchronize_rcu(); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | static void mousedev_detach_client(struct mousedev *mousedev, |
| 515 | struct mousedev_client *client) |
| 516 | { |
| 517 | spin_lock(&mousedev->client_lock); |
| 518 | list_del_rcu(&client->node); |
| 519 | spin_unlock(&mousedev->client_lock); |
Dmitry Torokhov | 82ba56c | 2007-10-13 15:46:55 -0400 | [diff] [blame] | 520 | synchronize_rcu(); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 521 | } |
| 522 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 523 | static int mousedev_release(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 525 | struct mousedev_client *client = file->private_data; |
| 526 | struct mousedev *mousedev = client->mousedev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 528 | mousedev_detach_client(mousedev, client); |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 529 | kfree(client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 531 | mousedev_close_device(mousedev); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 532 | put_device(&mousedev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | return 0; |
| 535 | } |
| 536 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 537 | static int mousedev_open(struct inode *inode, struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 539 | struct mousedev_client *client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | struct mousedev *mousedev; |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 541 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | int i; |
| 543 | |
| 544 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
| 545 | if (imajor(inode) == MISC_MAJOR) |
| 546 | i = MOUSEDEV_MIX; |
| 547 | else |
| 548 | #endif |
| 549 | i = iminor(inode) - MOUSEDEV_MINOR_BASE; |
| 550 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 551 | if (i >= MOUSEDEV_MINORS) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | return -ENODEV; |
| 553 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 554 | error = mutex_lock_interruptible(&mousedev_table_mutex); |
Arnd Bergmann | f9c8154 | 2008-05-20 19:16:20 +0200 | [diff] [blame] | 555 | if (error) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 556 | return error; |
Arnd Bergmann | f9c8154 | 2008-05-20 19:16:20 +0200 | [diff] [blame] | 557 | } |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 558 | mousedev = mousedev_table[i]; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 559 | if (mousedev) |
| 560 | get_device(&mousedev->dev); |
| 561 | mutex_unlock(&mousedev_table_mutex); |
| 562 | |
Arnd Bergmann | f9c8154 | 2008-05-20 19:16:20 +0200 | [diff] [blame] | 563 | if (!mousedev) { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 564 | return -ENODEV; |
Arnd Bergmann | f9c8154 | 2008-05-20 19:16:20 +0200 | [diff] [blame] | 565 | } |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 566 | |
| 567 | client = kzalloc(sizeof(struct mousedev_client), GFP_KERNEL); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 568 | if (!client) { |
| 569 | error = -ENOMEM; |
| 570 | goto err_put_mousedev; |
| 571 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 573 | spin_lock_init(&client->packet_lock); |
| 574 | client->pos_x = xres / 2; |
| 575 | client->pos_y = yres / 2; |
| 576 | client->mousedev = mousedev; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 577 | mousedev_attach_client(mousedev, client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 579 | error = mousedev_open_device(mousedev); |
| 580 | if (error) |
| 581 | goto err_free_client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 583 | file->private_data = client; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | return 0; |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 585 | |
| 586 | err_free_client: |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 587 | mousedev_detach_client(mousedev, client); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 588 | kfree(client); |
| 589 | err_put_mousedev: |
| 590 | put_device(&mousedev->dev); |
| 591 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | static inline int mousedev_limit_delta(int delta, int limit) |
| 595 | { |
| 596 | return delta > limit ? limit : (delta < -limit ? -limit : delta); |
| 597 | } |
| 598 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 599 | static void mousedev_packet(struct mousedev_client *client, |
| 600 | signed char *ps2_data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 602 | struct mousedev_motion *p = &client->packets[client->tail]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 604 | ps2_data[0] = 0x08 | |
| 605 | ((p->dx < 0) << 4) | ((p->dy < 0) << 5) | (p->buttons & 0x07); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | ps2_data[1] = mousedev_limit_delta(p->dx, 127); |
| 607 | ps2_data[2] = mousedev_limit_delta(p->dy, 127); |
| 608 | p->dx -= ps2_data[1]; |
| 609 | p->dy -= ps2_data[2]; |
| 610 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 611 | switch (client->mode) { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 612 | case MOUSEDEV_EMUL_EXPS: |
| 613 | ps2_data[3] = mousedev_limit_delta(p->dz, 7); |
| 614 | p->dz -= ps2_data[3]; |
| 615 | ps2_data[3] = (ps2_data[3] & 0x0f) | ((p->buttons & 0x18) << 1); |
| 616 | client->bufsiz = 4; |
| 617 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 619 | case MOUSEDEV_EMUL_IMPS: |
| 620 | ps2_data[0] |= |
| 621 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); |
| 622 | ps2_data[3] = mousedev_limit_delta(p->dz, 127); |
| 623 | p->dz -= ps2_data[3]; |
| 624 | client->bufsiz = 4; |
| 625 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 627 | case MOUSEDEV_EMUL_PS2: |
| 628 | default: |
| 629 | ps2_data[0] |= |
| 630 | ((p->buttons & 0x10) >> 3) | ((p->buttons & 0x08) >> 1); |
| 631 | p->dz = 0; |
| 632 | client->bufsiz = 3; |
| 633 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | if (!p->dx && !p->dy && !p->dz) { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 637 | if (client->tail == client->head) { |
| 638 | client->ready = 0; |
| 639 | client->last_buttons = p->buttons; |
Pavel Machek | c1e4c8d | 2005-05-27 12:53:03 -0700 | [diff] [blame] | 640 | } else |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 641 | client->tail = (client->tail + 1) % PACKET_QUEUE_LEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
| 644 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 645 | static void mousedev_generate_response(struct mousedev_client *client, |
| 646 | int command) |
| 647 | { |
| 648 | client->ps2[0] = 0xfa; /* ACK */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 650 | switch (command) { |
| 651 | |
| 652 | case 0xeb: /* Poll */ |
| 653 | mousedev_packet(client, &client->ps2[1]); |
| 654 | client->bufsiz++; /* account for leading ACK */ |
| 655 | break; |
| 656 | |
| 657 | case 0xf2: /* Get ID */ |
| 658 | switch (client->mode) { |
| 659 | case MOUSEDEV_EMUL_PS2: |
| 660 | client->ps2[1] = 0; |
| 661 | break; |
| 662 | case MOUSEDEV_EMUL_IMPS: |
| 663 | client->ps2[1] = 3; |
| 664 | break; |
| 665 | case MOUSEDEV_EMUL_EXPS: |
| 666 | client->ps2[1] = 4; |
| 667 | break; |
| 668 | } |
| 669 | client->bufsiz = 2; |
| 670 | break; |
| 671 | |
| 672 | case 0xe9: /* Get info */ |
| 673 | client->ps2[1] = 0x60; client->ps2[2] = 3; client->ps2[3] = 200; |
| 674 | client->bufsiz = 4; |
| 675 | break; |
| 676 | |
| 677 | case 0xff: /* Reset */ |
| 678 | client->impsseq = client->imexseq = 0; |
| 679 | client->mode = MOUSEDEV_EMUL_PS2; |
| 680 | client->ps2[1] = 0xaa; client->ps2[2] = 0x00; |
| 681 | client->bufsiz = 3; |
| 682 | break; |
| 683 | |
| 684 | default: |
| 685 | client->bufsiz = 1; |
| 686 | break; |
| 687 | } |
| 688 | client->buffer = client->bufsiz; |
| 689 | } |
| 690 | |
| 691 | static ssize_t mousedev_write(struct file *file, const char __user *buffer, |
| 692 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 694 | struct mousedev_client *client = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | unsigned char c; |
| 696 | unsigned int i; |
| 697 | |
| 698 | for (i = 0; i < count; i++) { |
| 699 | |
| 700 | if (get_user(c, buffer + i)) |
| 701 | return -EFAULT; |
| 702 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 703 | spin_lock_irq(&client->packet_lock); |
| 704 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 705 | if (c == mousedev_imex_seq[client->imexseq]) { |
| 706 | if (++client->imexseq == MOUSEDEV_SEQ_LEN) { |
| 707 | client->imexseq = 0; |
| 708 | client->mode = MOUSEDEV_EMUL_EXPS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 710 | } else |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 711 | client->imexseq = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 713 | if (c == mousedev_imps_seq[client->impsseq]) { |
| 714 | if (++client->impsseq == MOUSEDEV_SEQ_LEN) { |
| 715 | client->impsseq = 0; |
| 716 | client->mode = MOUSEDEV_EMUL_IMPS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | } |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 718 | } else |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 719 | client->impsseq = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 721 | mousedev_generate_response(client, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 723 | spin_unlock_irq(&client->packet_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | } |
| 725 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 726 | kill_fasync(&client->fasync, SIGIO, POLL_IN); |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 727 | wake_up_interruptible(&client->mousedev->wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | |
| 729 | return count; |
| 730 | } |
| 731 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 732 | static ssize_t mousedev_read(struct file *file, char __user *buffer, |
| 733 | size_t count, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 735 | struct mousedev_client *client = file->private_data; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 736 | struct mousedev *mousedev = client->mousedev; |
| 737 | signed char data[sizeof(client->ps2)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | int retval = 0; |
| 739 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 740 | if (!client->ready && !client->buffer && mousedev->exist && |
| 741 | (file->f_flags & O_NONBLOCK)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | return -EAGAIN; |
| 743 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 744 | retval = wait_event_interruptible(mousedev->wait, |
| 745 | !mousedev->exist || client->ready || client->buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | if (retval) |
| 747 | return retval; |
| 748 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 749 | if (!mousedev->exist) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | return -ENODEV; |
| 751 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 752 | spin_lock_irq(&client->packet_lock); |
| 753 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 754 | if (!client->buffer && client->ready) { |
| 755 | mousedev_packet(client, client->ps2); |
| 756 | client->buffer = client->bufsiz; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | } |
| 758 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 759 | if (count > client->buffer) |
| 760 | count = client->buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 762 | memcpy(data, client->ps2 + client->bufsiz - client->buffer, count); |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 763 | client->buffer -= count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 765 | spin_unlock_irq(&client->packet_lock); |
| 766 | |
| 767 | if (copy_to_user(buffer, data, count)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | return -EFAULT; |
| 769 | |
| 770 | return count; |
| 771 | } |
| 772 | |
| 773 | /* No kernel lock - fine */ |
| 774 | static unsigned int mousedev_poll(struct file *file, poll_table *wait) |
| 775 | { |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 776 | struct mousedev_client *client = file->private_data; |
| 777 | struct mousedev *mousedev = client->mousedev; |
Julien Moutinho | 4d4bf99 | 2010-07-15 23:27:56 -0700 | [diff] [blame] | 778 | unsigned int mask; |
Dmitry Torokhov | 1e0afb2 | 2006-06-26 01:48:47 -0400 | [diff] [blame] | 779 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 780 | poll_wait(file, &mousedev->wait, wait); |
Julien Moutinho | 4d4bf99 | 2010-07-15 23:27:56 -0700 | [diff] [blame] | 781 | |
| 782 | mask = mousedev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR; |
| 783 | if (client->ready || client->buffer) |
| 784 | mask |= POLLIN | POLLRDNORM; |
| 785 | |
| 786 | return mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
Dmitry Torokhov | 66e6611 | 2006-09-14 01:31:59 -0400 | [diff] [blame] | 789 | static const struct file_operations mousedev_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | .owner = THIS_MODULE, |
| 791 | .read = mousedev_read, |
| 792 | .write = mousedev_write, |
| 793 | .poll = mousedev_poll, |
| 794 | .open = mousedev_open, |
| 795 | .release = mousedev_release, |
| 796 | .fasync = mousedev_fasync, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 797 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | }; |
| 799 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 800 | static int mousedev_install_chrdev(struct mousedev *mousedev) |
| 801 | { |
| 802 | mousedev_table[mousedev->minor] = mousedev; |
| 803 | return 0; |
| 804 | } |
| 805 | |
| 806 | static void mousedev_remove_chrdev(struct mousedev *mousedev) |
| 807 | { |
| 808 | mutex_lock(&mousedev_table_mutex); |
| 809 | mousedev_table[mousedev->minor] = NULL; |
| 810 | mutex_unlock(&mousedev_table_mutex); |
| 811 | } |
| 812 | |
| 813 | /* |
| 814 | * Mark device non-existent. This disables writes, ioctls and |
| 815 | * prevents new users from opening the device. Already posted |
| 816 | * blocking reads will stay, however new ones will fail. |
| 817 | */ |
| 818 | static void mousedev_mark_dead(struct mousedev *mousedev) |
| 819 | { |
| 820 | mutex_lock(&mousedev->mutex); |
Dmitry Torokhov | 20da92d | 2010-07-15 23:27:36 -0700 | [diff] [blame] | 821 | mousedev->exist = false; |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 822 | mutex_unlock(&mousedev->mutex); |
| 823 | } |
| 824 | |
| 825 | /* |
| 826 | * Wake up users waiting for IO so they can disconnect from |
| 827 | * dead device. |
| 828 | */ |
| 829 | static void mousedev_hangup(struct mousedev *mousedev) |
| 830 | { |
| 831 | struct mousedev_client *client; |
| 832 | |
| 833 | spin_lock(&mousedev->client_lock); |
| 834 | list_for_each_entry(client, &mousedev->client_list, node) |
| 835 | kill_fasync(&client->fasync, SIGIO, POLL_HUP); |
| 836 | spin_unlock(&mousedev->client_lock); |
| 837 | |
| 838 | wake_up_interruptible(&mousedev->wait); |
| 839 | } |
| 840 | |
| 841 | static void mousedev_cleanup(struct mousedev *mousedev) |
| 842 | { |
| 843 | struct input_handle *handle = &mousedev->handle; |
| 844 | |
| 845 | mousedev_mark_dead(mousedev); |
| 846 | mousedev_hangup(mousedev); |
| 847 | mousedev_remove_chrdev(mousedev); |
| 848 | |
| 849 | /* mousedev is marked dead so no one else accesses mousedev->open */ |
| 850 | if (mousedev->open) |
| 851 | input_close_device(handle); |
| 852 | } |
| 853 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 854 | static struct mousedev *mousedev_create(struct input_dev *dev, |
| 855 | struct input_handler *handler, |
| 856 | int minor) |
| 857 | { |
| 858 | struct mousedev *mousedev; |
| 859 | int error; |
| 860 | |
| 861 | mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL); |
| 862 | if (!mousedev) { |
| 863 | error = -ENOMEM; |
| 864 | goto err_out; |
| 865 | } |
| 866 | |
| 867 | INIT_LIST_HEAD(&mousedev->client_list); |
| 868 | INIT_LIST_HEAD(&mousedev->mixdev_node); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 869 | spin_lock_init(&mousedev->client_lock); |
| 870 | mutex_init(&mousedev->mutex); |
| 871 | lockdep_set_subclass(&mousedev->mutex, |
Hitoshi Mitake | f74eef9 | 2010-10-13 11:35:40 -0700 | [diff] [blame] | 872 | minor == MOUSEDEV_MIX ? SINGLE_DEPTH_NESTING : 0); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 873 | init_waitqueue_head(&mousedev->wait); |
| 874 | |
| 875 | if (minor == MOUSEDEV_MIX) |
Thadeu Lima de Souza Cascardo | 3d5cb60 | 2009-05-09 16:08:04 -0700 | [diff] [blame] | 876 | dev_set_name(&mousedev->dev, "mice"); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 877 | else |
Thadeu Lima de Souza Cascardo | 3d5cb60 | 2009-05-09 16:08:04 -0700 | [diff] [blame] | 878 | dev_set_name(&mousedev->dev, "mouse%d", minor); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 879 | |
| 880 | mousedev->minor = minor; |
Dmitry Torokhov | 20da92d | 2010-07-15 23:27:36 -0700 | [diff] [blame] | 881 | mousedev->exist = true; |
Dmitry Torokhov | a7097ff | 2008-04-01 00:22:53 -0400 | [diff] [blame] | 882 | mousedev->handle.dev = input_get_device(dev); |
Thadeu Lima de Souza Cascardo | 3d5cb60 | 2009-05-09 16:08:04 -0700 | [diff] [blame] | 883 | mousedev->handle.name = dev_name(&mousedev->dev); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 884 | mousedev->handle.handler = handler; |
| 885 | mousedev->handle.private = mousedev; |
| 886 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 887 | mousedev->dev.class = &input_class; |
| 888 | if (dev) |
| 889 | mousedev->dev.parent = &dev->dev; |
| 890 | mousedev->dev.devt = MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor); |
| 891 | mousedev->dev.release = mousedev_free; |
| 892 | device_initialize(&mousedev->dev); |
| 893 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 894 | if (minor != MOUSEDEV_MIX) { |
| 895 | error = input_register_handle(&mousedev->handle); |
| 896 | if (error) |
| 897 | goto err_free_mousedev; |
| 898 | } |
| 899 | |
| 900 | error = mousedev_install_chrdev(mousedev); |
| 901 | if (error) |
| 902 | goto err_unregister_handle; |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 903 | |
| 904 | error = device_add(&mousedev->dev); |
| 905 | if (error) |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 906 | goto err_cleanup_mousedev; |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 907 | |
| 908 | return mousedev; |
| 909 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 910 | err_cleanup_mousedev: |
| 911 | mousedev_cleanup(mousedev); |
| 912 | err_unregister_handle: |
| 913 | if (minor != MOUSEDEV_MIX) |
| 914 | input_unregister_handle(&mousedev->handle); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 915 | err_free_mousedev: |
| 916 | put_device(&mousedev->dev); |
| 917 | err_out: |
| 918 | return ERR_PTR(error); |
| 919 | } |
| 920 | |
| 921 | static void mousedev_destroy(struct mousedev *mousedev) |
| 922 | { |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 923 | device_del(&mousedev->dev); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 924 | mousedev_cleanup(mousedev); |
| 925 | if (mousedev->minor != MOUSEDEV_MIX) |
| 926 | input_unregister_handle(&mousedev->handle); |
| 927 | put_device(&mousedev->dev); |
| 928 | } |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 929 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 930 | static int mixdev_add_device(struct mousedev *mousedev) |
| 931 | { |
| 932 | int retval; |
| 933 | |
| 934 | retval = mutex_lock_interruptible(&mousedev_mix->mutex); |
| 935 | if (retval) |
| 936 | return retval; |
| 937 | |
| 938 | if (mousedev_mix->open) { |
| 939 | retval = mousedev_open_device(mousedev); |
| 940 | if (retval) |
| 941 | goto out; |
| 942 | |
| 943 | mousedev->mixdev_open = 1; |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 944 | } |
| 945 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 946 | get_device(&mousedev->dev); |
| 947 | list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list); |
| 948 | |
| 949 | out: |
| 950 | mutex_unlock(&mousedev_mix->mutex); |
| 951 | return retval; |
| 952 | } |
| 953 | |
| 954 | static void mixdev_remove_device(struct mousedev *mousedev) |
| 955 | { |
| 956 | mutex_lock(&mousedev_mix->mutex); |
| 957 | |
| 958 | if (mousedev->mixdev_open) { |
| 959 | mousedev->mixdev_open = 0; |
| 960 | mousedev_close_device(mousedev); |
| 961 | } |
| 962 | |
| 963 | list_del_init(&mousedev->mixdev_node); |
| 964 | mutex_unlock(&mousedev_mix->mutex); |
| 965 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 966 | put_device(&mousedev->dev); |
| 967 | } |
| 968 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 969 | static int mousedev_connect(struct input_handler *handler, |
| 970 | struct input_dev *dev, |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 971 | const struct input_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | { |
| 973 | struct mousedev *mousedev; |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 974 | int minor; |
| 975 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 977 | for (minor = 0; minor < MOUSEDEV_MINORS; minor++) |
| 978 | if (!mousedev_table[minor]) |
| 979 | break; |
| 980 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | if (minor == MOUSEDEV_MINORS) { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame^] | 982 | pr_err("no more free mousedev devices\n"); |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 983 | return -ENFILE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | } |
| 985 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 986 | mousedev = mousedev_create(dev, handler, minor); |
| 987 | if (IS_ERR(mousedev)) |
| 988 | return PTR_ERR(mousedev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 990 | error = mixdev_add_device(mousedev); |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 991 | if (error) { |
| 992 | mousedev_destroy(mousedev); |
| 993 | return error; |
| 994 | } |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 995 | |
| 996 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | static void mousedev_disconnect(struct input_handle *handle) |
| 1000 | { |
| 1001 | struct mousedev *mousedev = handle->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | |
Dmitry Torokhov | d542ed8 | 2007-04-12 01:30:15 -0400 | [diff] [blame] | 1003 | mixdev_remove_device(mousedev); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1004 | mousedev_destroy(mousedev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | } |
| 1006 | |
Dmitry Torokhov | 66e6611 | 2006-09-14 01:31:59 -0400 | [diff] [blame] | 1007 | static const struct input_device_id mousedev_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 1009 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
| 1010 | INPUT_DEVICE_ID_MATCH_KEYBIT | |
| 1011 | INPUT_DEVICE_ID_MATCH_RELBIT, |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1012 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
| 1013 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
| 1014 | .relbit = { BIT_MASK(REL_X) | BIT_MASK(REL_Y) }, |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 1015 | }, /* A mouse like device, at least one button, |
| 1016 | two relative axes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 1018 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
| 1019 | INPUT_DEVICE_ID_MATCH_RELBIT, |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1020 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_REL) }, |
| 1021 | .relbit = { BIT_MASK(REL_WHEEL) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | }, /* A separate scrollwheel */ |
| 1023 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 1024 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
| 1025 | INPUT_DEVICE_ID_MATCH_KEYBIT | |
| 1026 | INPUT_DEVICE_ID_MATCH_ABSBIT, |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1027 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
| 1028 | .keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) }, |
| 1029 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 1030 | }, /* A tablet like device, at least touch detection, |
| 1031 | two absolute axes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | { |
Dmitry Torokhov | 464b241 | 2007-08-30 00:22:24 -0400 | [diff] [blame] | 1033 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
| 1034 | INPUT_DEVICE_ID_MATCH_KEYBIT | |
| 1035 | INPUT_DEVICE_ID_MATCH_ABSBIT, |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 1036 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
| 1037 | .keybit = { [BIT_WORD(BTN_TOOL_FINGER)] = |
| 1038 | BIT_MASK(BTN_TOOL_FINGER) }, |
| 1039 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) | |
| 1040 | BIT_MASK(ABS_PRESSURE) | |
| 1041 | BIT_MASK(ABS_TOOL_WIDTH) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | }, /* A touchpad */ |
Micah Parrish | 6724f93 | 2008-01-17 12:01:04 -0500 | [diff] [blame] | 1043 | { |
| 1044 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT | |
| 1045 | INPUT_DEVICE_ID_MATCH_KEYBIT | |
| 1046 | INPUT_DEVICE_ID_MATCH_ABSBIT, |
Dmitry Torokhov | d182c10 | 2008-01-30 16:33:40 -0500 | [diff] [blame] | 1047 | .evbit = { BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) }, |
Micah Parrish | 6724f93 | 2008-01-17 12:01:04 -0500 | [diff] [blame] | 1048 | .keybit = { [BIT_WORD(BTN_LEFT)] = BIT_MASK(BTN_LEFT) }, |
| 1049 | .absbit = { BIT_MASK(ABS_X) | BIT_MASK(ABS_Y) }, |
| 1050 | }, /* Mouse-like device with absolute X and Y but ordinary |
| 1051 | clicks, like hp ILO2 High Performance mouse */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | |
Dmitry Torokhov | d0ffb9b | 2007-04-12 01:30:00 -0400 | [diff] [blame] | 1053 | { }, /* Terminating entry */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | }; |
| 1055 | |
| 1056 | MODULE_DEVICE_TABLE(input, mousedev_ids); |
| 1057 | |
| 1058 | static struct input_handler mousedev_handler = { |
| 1059 | .event = mousedev_event, |
| 1060 | .connect = mousedev_connect, |
| 1061 | .disconnect = mousedev_disconnect, |
| 1062 | .fops = &mousedev_fops, |
| 1063 | .minor = MOUSEDEV_MINOR_BASE, |
| 1064 | .name = "mousedev", |
| 1065 | .id_table = mousedev_ids, |
| 1066 | }; |
| 1067 | |
| 1068 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
| 1069 | static struct miscdevice psaux_mouse = { |
| 1070 | PSMOUSE_MINOR, "psaux", &mousedev_fops |
| 1071 | }; |
| 1072 | static int psaux_registered; |
| 1073 | #endif |
| 1074 | |
| 1075 | static int __init mousedev_init(void) |
| 1076 | { |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1077 | int error; |
| 1078 | |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1079 | mousedev_mix = mousedev_create(NULL, &mousedev_handler, MOUSEDEV_MIX); |
| 1080 | if (IS_ERR(mousedev_mix)) |
| 1081 | return PTR_ERR(mousedev_mix); |
| 1082 | |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1083 | error = input_register_handler(&mousedev_handler); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1084 | if (error) { |
| 1085 | mousedev_destroy(mousedev_mix); |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1086 | return error; |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1087 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | |
| 1089 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1090 | error = misc_register(&psaux_mouse); |
| 1091 | if (error) |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame^] | 1092 | pr_warning("could not register psaux device, error: %d\n", |
| 1093 | error); |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 1094 | else |
| 1095 | psaux_registered = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | #endif |
| 1097 | |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame^] | 1098 | pr_info("PS/2 mouse device common for all mice\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | static void __exit mousedev_exit(void) |
| 1104 | { |
| 1105 | #ifdef CONFIG_INPUT_MOUSEDEV_PSAUX |
| 1106 | if (psaux_registered) |
| 1107 | misc_deregister(&psaux_mouse); |
| 1108 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | input_unregister_handler(&mousedev_handler); |
Dmitry Torokhov | 9657d75 | 2007-06-14 23:32:24 -0400 | [diff] [blame] | 1110 | mousedev_destroy(mousedev_mix); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | } |
| 1112 | |
| 1113 | module_init(mousedev_init); |
| 1114 | module_exit(mousedev_exit); |