Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * PS/2 driver library |
| 3 | * |
| 4 | * Copyright (c) 1999-2002 Vojtech Pavlik |
| 5 | * Copyright (c) 2004 Dmitry Torokhov |
| 6 | */ |
| 7 | |
| 8 | /* |
| 9 | * This program is free software; you can redistribute it and/or modify it |
| 10 | * under the terms of the GNU General Public License version 2 as published by |
| 11 | * the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/module.h> |
Alexey Dobriyan | d43c36d | 2009-10-07 17:09:06 +0400 | [diff] [blame] | 16 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/interrupt.h> |
| 18 | #include <linux/input.h> |
| 19 | #include <linux/serio.h> |
Dmitry Torokhov | 181d683 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 20 | #include <linux/i8042.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/libps2.h> |
| 22 | |
| 23 | #define DRIVER_DESC "PS/2 driver library" |
| 24 | |
| 25 | MODULE_AUTHOR("Dmitry Torokhov <dtor@mail.ru>"); |
| 26 | MODULE_DESCRIPTION("PS/2 driver library"); |
| 27 | MODULE_LICENSE("GPL"); |
| 28 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | /* |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 30 | * ps2_sendbyte() sends a byte to the device and waits for acknowledge. |
| 31 | * It doesn't handle retransmission, though it could - because if there |
| 32 | * is a need for retransmissions device has to be replaced anyway. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | * |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 34 | * ps2_sendbyte() can only be called from a process context. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | */ |
| 36 | |
| 37 | int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout) |
| 38 | { |
| 39 | serio_pause_rx(ps2dev->serio); |
| 40 | ps2dev->nak = 1; |
| 41 | ps2dev->flags |= PS2_FLAG_ACK; |
| 42 | serio_continue_rx(ps2dev->serio); |
| 43 | |
| 44 | if (serio_write(ps2dev->serio, byte) == 0) |
| 45 | wait_event_timeout(ps2dev->wait, |
| 46 | !(ps2dev->flags & PS2_FLAG_ACK), |
| 47 | msecs_to_jiffies(timeout)); |
| 48 | |
| 49 | serio_pause_rx(ps2dev->serio); |
| 50 | ps2dev->flags &= ~PS2_FLAG_ACK; |
| 51 | serio_continue_rx(ps2dev->serio); |
| 52 | |
| 53 | return -ps2dev->nak; |
| 54 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 55 | EXPORT_SYMBOL(ps2_sendbyte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Dmitry Torokhov | 181d683 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 57 | void ps2_begin_command(struct ps2dev *ps2dev) |
| 58 | { |
| 59 | mutex_lock(&ps2dev->cmd_mutex); |
| 60 | |
| 61 | if (i8042_check_port_owner(ps2dev->serio)) |
| 62 | i8042_lock_chip(); |
| 63 | } |
| 64 | EXPORT_SYMBOL(ps2_begin_command); |
| 65 | |
| 66 | void ps2_end_command(struct ps2dev *ps2dev) |
| 67 | { |
| 68 | if (i8042_check_port_owner(ps2dev->serio)) |
| 69 | i8042_unlock_chip(); |
| 70 | |
| 71 | mutex_unlock(&ps2dev->cmd_mutex); |
| 72 | } |
| 73 | EXPORT_SYMBOL(ps2_end_command); |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 76 | * ps2_drain() waits for device to transmit requested number of bytes |
| 77 | * and discards them. |
| 78 | */ |
| 79 | |
| 80 | void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout) |
| 81 | { |
| 82 | if (maxbytes > sizeof(ps2dev->cmdbuf)) { |
| 83 | WARN_ON(1); |
| 84 | maxbytes = sizeof(ps2dev->cmdbuf); |
| 85 | } |
| 86 | |
Dmitry Torokhov | 181d683 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 87 | ps2_begin_command(ps2dev); |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 88 | |
| 89 | serio_pause_rx(ps2dev->serio); |
| 90 | ps2dev->flags = PS2_FLAG_CMD; |
| 91 | ps2dev->cmdcnt = maxbytes; |
| 92 | serio_continue_rx(ps2dev->serio); |
| 93 | |
| 94 | wait_event_timeout(ps2dev->wait, |
| 95 | !(ps2dev->flags & PS2_FLAG_CMD), |
| 96 | msecs_to_jiffies(timeout)); |
Dmitry Torokhov | 181d683 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 97 | |
| 98 | ps2_end_command(ps2dev); |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 99 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 100 | EXPORT_SYMBOL(ps2_drain); |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 101 | |
| 102 | /* |
Dmitry Torokhov | 905ab9d | 2005-06-01 02:39:53 -0500 | [diff] [blame] | 103 | * ps2_is_keyboard_id() checks received ID byte against the list of |
| 104 | * known keyboard IDs. |
| 105 | */ |
| 106 | |
Dmitry Torokhov | 9807879 | 2006-09-14 01:31:27 -0400 | [diff] [blame] | 107 | int ps2_is_keyboard_id(char id_byte) |
Dmitry Torokhov | 905ab9d | 2005-06-01 02:39:53 -0500 | [diff] [blame] | 108 | { |
Tobias Klauser | c5a69d5 | 2007-02-17 20:11:19 +0100 | [diff] [blame] | 109 | static const char keyboard_ids[] = { |
Dmitry Torokhov | 905ab9d | 2005-06-01 02:39:53 -0500 | [diff] [blame] | 110 | 0xab, /* Regular keyboards */ |
| 111 | 0xac, /* NCD Sun keyboard */ |
| 112 | 0x2b, /* Trust keyboard, translated */ |
| 113 | 0x5d, /* Trust keyboard */ |
| 114 | 0x60, /* NMB SGI keyboard, translated */ |
| 115 | 0x47, /* NMB SGI keyboard */ |
| 116 | }; |
| 117 | |
| 118 | return memchr(keyboard_ids, id_byte, sizeof(keyboard_ids)) != NULL; |
| 119 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 120 | EXPORT_SYMBOL(ps2_is_keyboard_id); |
Dmitry Torokhov | 905ab9d | 2005-06-01 02:39:53 -0500 | [diff] [blame] | 121 | |
| 122 | /* |
| 123 | * ps2_adjust_timeout() is called after receiving 1st byte of command |
| 124 | * response and tries to reduce remaining timeout to speed up command |
| 125 | * completion. |
| 126 | */ |
| 127 | |
| 128 | static int ps2_adjust_timeout(struct ps2dev *ps2dev, int command, int timeout) |
| 129 | { |
| 130 | switch (command) { |
| 131 | case PS2_CMD_RESET_BAT: |
| 132 | /* |
| 133 | * Device has sent the first response byte after |
| 134 | * reset command, reset is thus done, so we can |
| 135 | * shorten the timeout. |
| 136 | * The next byte will come soon (keyboard) or not |
| 137 | * at all (mouse). |
| 138 | */ |
| 139 | if (timeout > msecs_to_jiffies(100)) |
| 140 | timeout = msecs_to_jiffies(100); |
| 141 | break; |
| 142 | |
| 143 | case PS2_CMD_GETID: |
| 144 | /* |
Dmitry Torokhov | 9807879 | 2006-09-14 01:31:27 -0400 | [diff] [blame] | 145 | * Microsoft Natural Elite keyboard responds to |
| 146 | * the GET ID command as it were a mouse, with |
| 147 | * a single byte. Fail the command so atkbd will |
| 148 | * use alternative probe to detect it. |
| 149 | */ |
| 150 | if (ps2dev->cmdbuf[1] == 0xaa) { |
| 151 | serio_pause_rx(ps2dev->serio); |
| 152 | ps2dev->flags = 0; |
| 153 | serio_continue_rx(ps2dev->serio); |
| 154 | timeout = 0; |
| 155 | } |
| 156 | |
| 157 | /* |
Dmitry Torokhov | 905ab9d | 2005-06-01 02:39:53 -0500 | [diff] [blame] | 158 | * If device behind the port is not a keyboard there |
| 159 | * won't be 2nd byte of ID response. |
| 160 | */ |
| 161 | if (!ps2_is_keyboard_id(ps2dev->cmdbuf[1])) { |
| 162 | serio_pause_rx(ps2dev->serio); |
| 163 | ps2dev->flags = ps2dev->cmdcnt = 0; |
| 164 | serio_continue_rx(ps2dev->serio); |
| 165 | timeout = 0; |
| 166 | } |
| 167 | break; |
| 168 | |
| 169 | default: |
| 170 | break; |
| 171 | } |
| 172 | |
| 173 | return timeout; |
| 174 | } |
| 175 | |
| 176 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | * ps2_command() sends a command and its parameters to the mouse, |
| 178 | * then waits for the response and puts it in the param array. |
| 179 | * |
| 180 | * ps2_command() can only be called from a process context |
| 181 | */ |
| 182 | |
Tai-hwa Liang | fc69f4a | 2009-05-10 18:15:39 -0700 | [diff] [blame] | 183 | int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
| 185 | int timeout; |
| 186 | int send = (command >> 12) & 0xf; |
| 187 | int receive = (command >> 8) & 0xf; |
| 188 | int rc = -1; |
| 189 | int i; |
| 190 | |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 191 | if (receive > sizeof(ps2dev->cmdbuf)) { |
| 192 | WARN_ON(1); |
| 193 | return -1; |
| 194 | } |
| 195 | |
Dmitry Torokhov | 95349fe | 2006-07-06 23:54:48 -0400 | [diff] [blame] | 196 | if (send && !param) { |
| 197 | WARN_ON(1); |
| 198 | return -1; |
| 199 | } |
| 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | serio_pause_rx(ps2dev->serio); |
| 202 | ps2dev->flags = command == PS2_CMD_GETID ? PS2_FLAG_WAITID : 0; |
| 203 | ps2dev->cmdcnt = receive; |
| 204 | if (receive && param) |
| 205 | for (i = 0; i < receive; i++) |
| 206 | ps2dev->cmdbuf[(receive - 1) - i] = param[i]; |
| 207 | serio_continue_rx(ps2dev->serio); |
| 208 | |
| 209 | /* |
| 210 | * Some devices (Synaptics) peform the reset before |
| 211 | * ACKing the reset command, and so it can take a long |
Justin P. Mattock | 83ae417 | 2011-06-22 23:29:19 -0700 | [diff] [blame] | 212 | * time before the ACK arrives. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | */ |
Dmitry Torokhov | c611763 | 2005-06-01 02:39:51 -0500 | [diff] [blame] | 214 | if (ps2_sendbyte(ps2dev, command & 0xff, |
Dmitry Vyukov | 218c1f7 | 2015-09-29 15:54:58 -0700 | [diff] [blame] | 215 | command == PS2_CMD_RESET_BAT ? 1000 : 200)) { |
| 216 | serio_pause_rx(ps2dev->serio); |
| 217 | goto out_reset_flags; |
| 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
Dmitry Vyukov | 218c1f7 | 2015-09-29 15:54:58 -0700 | [diff] [blame] | 220 | for (i = 0; i < send; i++) { |
| 221 | if (ps2_sendbyte(ps2dev, param[i], 200)) { |
| 222 | serio_pause_rx(ps2dev->serio); |
| 223 | goto out_reset_flags; |
| 224 | } |
| 225 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
| 227 | /* |
| 228 | * The reset command takes a long time to execute. |
| 229 | */ |
| 230 | timeout = msecs_to_jiffies(command == PS2_CMD_RESET_BAT ? 4000 : 500); |
| 231 | |
| 232 | timeout = wait_event_timeout(ps2dev->wait, |
| 233 | !(ps2dev->flags & PS2_FLAG_CMD1), timeout); |
| 234 | |
Dmitry Torokhov | a3ce6ea | 2009-05-28 09:51:31 -0700 | [diff] [blame] | 235 | if (ps2dev->cmdcnt && !(ps2dev->flags & PS2_FLAG_CMD1)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Dmitry Torokhov | 905ab9d | 2005-06-01 02:39:53 -0500 | [diff] [blame] | 237 | timeout = ps2_adjust_timeout(ps2dev, command, timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | wait_event_timeout(ps2dev->wait, |
| 239 | !(ps2dev->flags & PS2_FLAG_CMD), timeout); |
| 240 | } |
| 241 | |
Dmitry Vyukov | 218c1f7 | 2015-09-29 15:54:58 -0700 | [diff] [blame] | 242 | serio_pause_rx(ps2dev->serio); |
| 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | if (param) |
| 245 | for (i = 0; i < receive; i++) |
| 246 | param[i] = ps2dev->cmdbuf[(receive - 1) - i]; |
| 247 | |
| 248 | if (ps2dev->cmdcnt && (command != PS2_CMD_RESET_BAT || ps2dev->cmdcnt != 1)) |
Dmitry Vyukov | 218c1f7 | 2015-09-29 15:54:58 -0700 | [diff] [blame] | 249 | goto out_reset_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | rc = 0; |
| 252 | |
Dmitry Vyukov | 218c1f7 | 2015-09-29 15:54:58 -0700 | [diff] [blame] | 253 | out_reset_flags: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | ps2dev->flags = 0; |
| 255 | serio_continue_rx(ps2dev->serio); |
| 256 | |
Tai-hwa Liang | fc69f4a | 2009-05-10 18:15:39 -0700 | [diff] [blame] | 257 | return rc; |
| 258 | } |
| 259 | EXPORT_SYMBOL(__ps2_command); |
| 260 | |
| 261 | int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command) |
| 262 | { |
| 263 | int rc; |
| 264 | |
Dmitry Torokhov | 181d683 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 265 | ps2_begin_command(ps2dev); |
Tai-hwa Liang | fc69f4a | 2009-05-10 18:15:39 -0700 | [diff] [blame] | 266 | rc = __ps2_command(ps2dev, param, command); |
Dmitry Torokhov | 181d683 | 2009-09-16 01:06:43 -0700 | [diff] [blame] | 267 | ps2_end_command(ps2dev); |
Tai-hwa Liang | fc69f4a | 2009-05-10 18:15:39 -0700 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return rc; |
| 270 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 271 | EXPORT_SYMBOL(ps2_command); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
| 273 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | * ps2_init() initializes ps2dev structure |
| 275 | */ |
| 276 | |
| 277 | void ps2_init(struct ps2dev *ps2dev, struct serio *serio) |
| 278 | { |
Arjan van de Ven | c4e32e9 | 2006-02-19 00:21:55 -0500 | [diff] [blame] | 279 | mutex_init(&ps2dev->cmd_mutex); |
Jiri Kosina | 88aa010 | 2006-10-11 01:45:31 -0400 | [diff] [blame] | 280 | lockdep_set_subclass(&ps2dev->cmd_mutex, serio->depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | init_waitqueue_head(&ps2dev->wait); |
| 282 | ps2dev->serio = serio; |
| 283 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 284 | EXPORT_SYMBOL(ps2_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
| 286 | /* |
| 287 | * ps2_handle_ack() is supposed to be used in interrupt handler |
| 288 | * to properly process ACK/NAK of a command from a PS/2 device. |
| 289 | */ |
| 290 | |
| 291 | int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data) |
| 292 | { |
| 293 | switch (data) { |
| 294 | case PS2_RET_ACK: |
| 295 | ps2dev->nak = 0; |
| 296 | break; |
| 297 | |
| 298 | case PS2_RET_NAK: |
Dmitry Torokhov | a2d781f | 2008-11-19 17:02:24 -0500 | [diff] [blame] | 299 | ps2dev->flags |= PS2_FLAG_NAK; |
| 300 | ps2dev->nak = PS2_RET_NAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | break; |
| 302 | |
Dmitry Torokhov | a2d781f | 2008-11-19 17:02:24 -0500 | [diff] [blame] | 303 | case PS2_RET_ERR: |
| 304 | if (ps2dev->flags & PS2_FLAG_NAK) { |
| 305 | ps2dev->flags &= ~PS2_FLAG_NAK; |
| 306 | ps2dev->nak = PS2_RET_ERR; |
| 307 | break; |
| 308 | } |
| 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | /* |
| 311 | * Workaround for mice which don't ACK the Get ID command. |
| 312 | * These are valid mouse IDs that we recognize. |
| 313 | */ |
| 314 | case 0x00: |
| 315 | case 0x03: |
| 316 | case 0x04: |
| 317 | if (ps2dev->flags & PS2_FLAG_WAITID) { |
| 318 | ps2dev->nak = 0; |
| 319 | break; |
| 320 | } |
| 321 | /* Fall through */ |
| 322 | default: |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | |
Dmitry Torokhov | a2d781f | 2008-11-19 17:02:24 -0500 | [diff] [blame] | 327 | if (!ps2dev->nak) { |
| 328 | ps2dev->flags &= ~PS2_FLAG_NAK; |
| 329 | if (ps2dev->cmdcnt) |
| 330 | ps2dev->flags |= PS2_FLAG_CMD | PS2_FLAG_CMD1; |
| 331 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
| 333 | ps2dev->flags &= ~PS2_FLAG_ACK; |
| 334 | wake_up(&ps2dev->wait); |
| 335 | |
| 336 | if (data != PS2_RET_ACK) |
| 337 | ps2_handle_response(ps2dev, data); |
| 338 | |
| 339 | return 1; |
| 340 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 341 | EXPORT_SYMBOL(ps2_handle_ack); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
| 343 | /* |
| 344 | * ps2_handle_response() is supposed to be used in interrupt handler |
| 345 | * to properly store device's response to a command and notify process |
| 346 | * waiting for completion of the command. |
| 347 | */ |
| 348 | |
| 349 | int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data) |
| 350 | { |
| 351 | if (ps2dev->cmdcnt) |
| 352 | ps2dev->cmdbuf[--ps2dev->cmdcnt] = data; |
| 353 | |
| 354 | if (ps2dev->flags & PS2_FLAG_CMD1) { |
| 355 | ps2dev->flags &= ~PS2_FLAG_CMD1; |
| 356 | if (ps2dev->cmdcnt) |
| 357 | wake_up(&ps2dev->wait); |
| 358 | } |
| 359 | |
| 360 | if (!ps2dev->cmdcnt) { |
| 361 | ps2dev->flags &= ~PS2_FLAG_CMD; |
| 362 | wake_up(&ps2dev->wait); |
| 363 | } |
| 364 | |
| 365 | return 1; |
| 366 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 367 | EXPORT_SYMBOL(ps2_handle_response); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
| 369 | void ps2_cmd_aborted(struct ps2dev *ps2dev) |
| 370 | { |
| 371 | if (ps2dev->flags & PS2_FLAG_ACK) |
| 372 | ps2dev->nak = 1; |
| 373 | |
| 374 | if (ps2dev->flags & (PS2_FLAG_ACK | PS2_FLAG_CMD)) |
| 375 | wake_up(&ps2dev->wait); |
| 376 | |
Dmitry Torokhov | a2d781f | 2008-11-19 17:02:24 -0500 | [diff] [blame] | 377 | /* reset all flags except last nack */ |
| 378 | ps2dev->flags &= PS2_FLAG_NAK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
Dmitry Torokhov | 5206c0d | 2006-09-14 01:31:40 -0400 | [diff] [blame] | 380 | EXPORT_SYMBOL(ps2_cmd_aborted); |