Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * i8042 keyboard and mouse controller driver for Linux |
| 3 | * |
| 4 | * Copyright (c) 1999-2004 Vojtech Pavlik |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License version 2 as published by |
| 10 | * the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/delay.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/moduleparam.h> |
| 16 | #include <linux/interrupt.h> |
| 17 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include <linux/init.h> |
| 19 | #include <linux/serio.h> |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/rcupdate.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 22 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <asm/io.h> |
| 25 | |
| 26 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); |
| 27 | MODULE_DESCRIPTION("i8042 keyboard and mouse controller driver"); |
| 28 | MODULE_LICENSE("GPL"); |
| 29 | |
Dmitry Torokhov | 945ef0d | 2005-09-04 01:42:00 -0500 | [diff] [blame] | 30 | static unsigned int i8042_nokbd; |
| 31 | module_param_named(nokbd, i8042_nokbd, bool, 0); |
| 32 | MODULE_PARM_DESC(nokbd, "Do not probe or use KBD port."); |
| 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | static unsigned int i8042_noaux; |
| 35 | module_param_named(noaux, i8042_noaux, bool, 0); |
| 36 | MODULE_PARM_DESC(noaux, "Do not probe or use AUX (mouse) port."); |
| 37 | |
| 38 | static unsigned int i8042_nomux; |
| 39 | module_param_named(nomux, i8042_nomux, bool, 0); |
| 40 | MODULE_PARM_DESC(nomux, "Do not check whether an active multiplexing conrtoller is present."); |
| 41 | |
| 42 | static unsigned int i8042_unlock; |
| 43 | module_param_named(unlock, i8042_unlock, bool, 0); |
| 44 | MODULE_PARM_DESC(unlock, "Ignore keyboard lock."); |
| 45 | |
| 46 | static unsigned int i8042_reset; |
| 47 | module_param_named(reset, i8042_reset, bool, 0); |
| 48 | MODULE_PARM_DESC(reset, "Reset controller during init and cleanup."); |
| 49 | |
| 50 | static unsigned int i8042_direct; |
| 51 | module_param_named(direct, i8042_direct, bool, 0); |
| 52 | MODULE_PARM_DESC(direct, "Put keyboard port into non-translated mode."); |
| 53 | |
| 54 | static unsigned int i8042_dumbkbd; |
| 55 | module_param_named(dumbkbd, i8042_dumbkbd, bool, 0); |
| 56 | MODULE_PARM_DESC(dumbkbd, "Pretend that controller can only read data from keyboard"); |
| 57 | |
| 58 | static unsigned int i8042_noloop; |
| 59 | module_param_named(noloop, i8042_noloop, bool, 0); |
| 60 | MODULE_PARM_DESC(noloop, "Disable the AUX Loopback command while probing for the AUX port"); |
| 61 | |
| 62 | static unsigned int i8042_blink_frequency = 500; |
| 63 | module_param_named(panicblink, i8042_blink_frequency, uint, 0600); |
| 64 | MODULE_PARM_DESC(panicblink, "Frequency with which keyboard LEDs should blink when kernel panics"); |
| 65 | |
| 66 | #ifdef CONFIG_PNP |
| 67 | static int i8042_nopnp; |
| 68 | module_param_named(nopnp, i8042_nopnp, bool, 0); |
| 69 | MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings"); |
| 70 | #endif |
| 71 | |
| 72 | #define DEBUG |
| 73 | #ifdef DEBUG |
| 74 | static int i8042_debug; |
| 75 | module_param_named(debug, i8042_debug, bool, 0600); |
| 76 | MODULE_PARM_DESC(debug, "Turn i8042 debugging mode on and off"); |
| 77 | #endif |
| 78 | |
| 79 | __obsolete_setup("i8042_noaux"); |
| 80 | __obsolete_setup("i8042_nomux"); |
| 81 | __obsolete_setup("i8042_unlock"); |
| 82 | __obsolete_setup("i8042_reset"); |
| 83 | __obsolete_setup("i8042_direct"); |
| 84 | __obsolete_setup("i8042_dumbkbd"); |
| 85 | |
| 86 | #include "i8042.h" |
| 87 | |
| 88 | static DEFINE_SPINLOCK(i8042_lock); |
| 89 | |
| 90 | struct i8042_port { |
| 91 | struct serio *serio; |
| 92 | int irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | unsigned char exists; |
| 94 | signed char mux; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | }; |
| 96 | |
| 97 | #define I8042_KBD_PORT_NO 0 |
| 98 | #define I8042_AUX_PORT_NO 1 |
| 99 | #define I8042_MUX_PORT_NO 2 |
| 100 | #define I8042_NUM_PORTS (I8042_NUM_MUX_PORTS + 2) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 101 | |
| 102 | static struct i8042_port i8042_ports[I8042_NUM_PORTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | static unsigned char i8042_initial_ctr; |
| 105 | static unsigned char i8042_ctr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | static unsigned char i8042_mux_present; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 107 | static unsigned char i8042_kbd_irq_registered; |
| 108 | static unsigned char i8042_aux_irq_registered; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame^] | 109 | static unsigned char i8042_suppress_kbd_ack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | static struct platform_device *i8042_platform_device; |
| 111 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 112 | static irqreturn_t i8042_interrupt(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | /* |
| 115 | * The i8042_wait_read() and i8042_wait_write functions wait for the i8042 to |
| 116 | * be ready for reading values from it / writing values to it. |
| 117 | * Called always with i8042_lock held. |
| 118 | */ |
| 119 | |
| 120 | static int i8042_wait_read(void) |
| 121 | { |
| 122 | int i = 0; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | while ((~i8042_read_status() & I8042_STR_OBF) && (i < I8042_CTL_TIMEOUT)) { |
| 125 | udelay(50); |
| 126 | i++; |
| 127 | } |
| 128 | return -(i == I8042_CTL_TIMEOUT); |
| 129 | } |
| 130 | |
| 131 | static int i8042_wait_write(void) |
| 132 | { |
| 133 | int i = 0; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | while ((i8042_read_status() & I8042_STR_IBF) && (i < I8042_CTL_TIMEOUT)) { |
| 136 | udelay(50); |
| 137 | i++; |
| 138 | } |
| 139 | return -(i == I8042_CTL_TIMEOUT); |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * i8042_flush() flushes all data that may be in the keyboard and mouse buffers |
| 144 | * of the i8042 down the toilet. |
| 145 | */ |
| 146 | |
| 147 | static int i8042_flush(void) |
| 148 | { |
| 149 | unsigned long flags; |
| 150 | unsigned char data, str; |
| 151 | int i = 0; |
| 152 | |
| 153 | spin_lock_irqsave(&i8042_lock, flags); |
| 154 | |
| 155 | while (((str = i8042_read_status()) & I8042_STR_OBF) && (i < I8042_BUFFER_SIZE)) { |
| 156 | udelay(50); |
| 157 | data = i8042_read_data(); |
| 158 | i++; |
| 159 | dbg("%02x <- i8042 (flush, %s)", data, |
| 160 | str & I8042_STR_AUXDATA ? "aux" : "kbd"); |
| 161 | } |
| 162 | |
| 163 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 164 | |
| 165 | return i; |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * i8042_command() executes a command on the i8042. It also sends the input |
| 170 | * parameter(s) of the commands to it, and receives the output value(s). The |
| 171 | * parameters are to be stored in the param array, and the output is placed |
| 172 | * into the same array. The number of the parameters and output values is |
| 173 | * encoded in bits 8-11 of the command number. |
| 174 | */ |
| 175 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 176 | static int __i8042_command(unsigned char *param, int command) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 178 | int i, error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | if (i8042_noloop && command == I8042_CMD_AUX_LOOP) |
| 181 | return -1; |
| 182 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 183 | error = i8042_wait_write(); |
| 184 | if (error) |
| 185 | return error; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 186 | |
| 187 | dbg("%02x -> i8042 (command)", command & 0xff); |
| 188 | i8042_write_command(command & 0xff); |
| 189 | |
| 190 | for (i = 0; i < ((command >> 12) & 0xf); i++) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 191 | error = i8042_wait_write(); |
| 192 | if (error) |
| 193 | return error; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 194 | dbg("%02x -> i8042 (parameter)", param[i]); |
| 195 | i8042_write_data(param[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 198 | for (i = 0; i < ((command >> 8) & 0xf); i++) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 199 | error = i8042_wait_read(); |
| 200 | if (error) { |
| 201 | dbg(" -- i8042 (timeout)"); |
| 202 | return error; |
| 203 | } |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 204 | |
| 205 | if (command == I8042_CMD_AUX_LOOP && |
| 206 | !(i8042_read_status() & I8042_STR_AUXDATA)) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 207 | dbg(" -- i8042 (auxerr)"); |
| 208 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | } |
| 210 | |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 211 | param[i] = i8042_read_data(); |
| 212 | dbg("%02x <- i8042 (return)", param[i]); |
| 213 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 215 | return 0; |
| 216 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 218 | static int i8042_command(unsigned char *param, int command) |
| 219 | { |
| 220 | unsigned long flags; |
| 221 | int retval; |
| 222 | |
| 223 | spin_lock_irqsave(&i8042_lock, flags); |
| 224 | retval = __i8042_command(param, command); |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 225 | spin_unlock_irqrestore(&i8042_lock, flags); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 226 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | return retval; |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * i8042_kbd_write() sends a byte out through the keyboard interface. |
| 232 | */ |
| 233 | |
| 234 | static int i8042_kbd_write(struct serio *port, unsigned char c) |
| 235 | { |
| 236 | unsigned long flags; |
| 237 | int retval = 0; |
| 238 | |
| 239 | spin_lock_irqsave(&i8042_lock, flags); |
| 240 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 241 | if (!(retval = i8042_wait_write())) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | dbg("%02x -> i8042 (kbd-data)", c); |
| 243 | i8042_write_data(c); |
| 244 | } |
| 245 | |
| 246 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 247 | |
| 248 | return retval; |
| 249 | } |
| 250 | |
| 251 | /* |
| 252 | * i8042_aux_write() sends a byte out through the aux interface. |
| 253 | */ |
| 254 | |
| 255 | static int i8042_aux_write(struct serio *serio, unsigned char c) |
| 256 | { |
| 257 | struct i8042_port *port = serio->port_data; |
| 258 | int retval; |
| 259 | |
| 260 | /* |
| 261 | * Send the byte out. |
| 262 | */ |
| 263 | |
| 264 | if (port->mux == -1) |
| 265 | retval = i8042_command(&c, I8042_CMD_AUX_SEND); |
| 266 | else |
| 267 | retval = i8042_command(&c, I8042_CMD_MUX_SEND + port->mux); |
| 268 | |
| 269 | /* |
| 270 | * Make sure the interrupt happens and the character is received even |
| 271 | * in the case the IRQ isn't wired, so that we can receive further |
| 272 | * characters later. |
| 273 | */ |
| 274 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 275 | i8042_interrupt(0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | return retval; |
| 277 | } |
| 278 | |
| 279 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | * i8042_start() is called by serio core when port is about to finish |
| 281 | * registering. It will mark port as existing so i8042_interrupt can |
| 282 | * start sending data through it. |
| 283 | */ |
| 284 | static int i8042_start(struct serio *serio) |
| 285 | { |
| 286 | struct i8042_port *port = serio->port_data; |
| 287 | |
| 288 | port->exists = 1; |
| 289 | mb(); |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * i8042_stop() marks serio port as non-existing so i8042_interrupt |
| 295 | * will not try to send data to the port that is about to go away. |
| 296 | * The function is called by serio core as part of unregister procedure. |
| 297 | */ |
| 298 | static void i8042_stop(struct serio *serio) |
| 299 | { |
| 300 | struct i8042_port *port = serio->port_data; |
| 301 | |
| 302 | port->exists = 0; |
Paul E. McKenney | b2b1866 | 2005-06-25 14:55:38 -0700 | [diff] [blame] | 303 | synchronize_sched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | port->serio = NULL; |
| 305 | } |
| 306 | |
| 307 | /* |
| 308 | * i8042_interrupt() is the most important function in this driver - |
| 309 | * it handles the interrupts from the i8042, and sends incoming bytes |
| 310 | * to the upper layers. |
| 311 | */ |
| 312 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 313 | static irqreturn_t i8042_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
| 315 | struct i8042_port *port; |
| 316 | unsigned long flags; |
| 317 | unsigned char str, data; |
| 318 | unsigned int dfl; |
| 319 | unsigned int port_no; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame^] | 320 | int ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | spin_lock_irqsave(&i8042_lock, flags); |
| 323 | str = i8042_read_status(); |
| 324 | if (unlikely(~str & I8042_STR_OBF)) { |
| 325 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 326 | if (irq) dbg("Interrupt %d, without any data", irq); |
| 327 | ret = 0; |
| 328 | goto out; |
| 329 | } |
| 330 | data = i8042_read_data(); |
| 331 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 332 | |
| 333 | if (i8042_mux_present && (str & I8042_STR_AUXDATA)) { |
| 334 | static unsigned long last_transmit; |
| 335 | static unsigned char last_str; |
| 336 | |
| 337 | dfl = 0; |
| 338 | if (str & I8042_STR_MUXERR) { |
| 339 | dbg("MUX error, status is %02x, data is %02x", str, data); |
| 340 | switch (data) { |
| 341 | default: |
| 342 | /* |
| 343 | * When MUXERR condition is signalled the data register can only contain |
| 344 | * 0xfd, 0xfe or 0xff if implementation follows the spec. Unfortunately |
| 345 | * it is not always the case. Some KBC just get confused which port the |
| 346 | * data came from and signal error leaving the data intact. They _do not_ |
| 347 | * revert to legacy mode (actually I've never seen KBC reverting to legacy |
| 348 | * mode yet, when we see one we'll add proper handling). |
| 349 | * Anyway, we will assume that the data came from the same serio last byte |
| 350 | * was transmitted (if transmission happened not too long ago). |
| 351 | */ |
| 352 | if (time_before(jiffies, last_transmit + HZ/10)) { |
| 353 | str = last_str; |
| 354 | break; |
| 355 | } |
| 356 | /* fall through - report timeout */ |
| 357 | case 0xfd: |
| 358 | case 0xfe: dfl = SERIO_TIMEOUT; data = 0xfe; break; |
| 359 | case 0xff: dfl = SERIO_PARITY; data = 0xfe; break; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | port_no = I8042_MUX_PORT_NO + ((str >> 6) & 3); |
| 364 | last_str = str; |
| 365 | last_transmit = jiffies; |
| 366 | } else { |
| 367 | |
| 368 | dfl = ((str & I8042_STR_PARITY) ? SERIO_PARITY : 0) | |
| 369 | ((str & I8042_STR_TIMEOUT) ? SERIO_TIMEOUT : 0); |
| 370 | |
| 371 | port_no = (str & I8042_STR_AUXDATA) ? |
| 372 | I8042_AUX_PORT_NO : I8042_KBD_PORT_NO; |
| 373 | } |
| 374 | |
| 375 | port = &i8042_ports[port_no]; |
| 376 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 377 | dbg("%02x <- i8042 (interrupt, %d, %d%s%s)", |
| 378 | data, port_no, irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | dfl & SERIO_PARITY ? ", bad parity" : "", |
| 380 | dfl & SERIO_TIMEOUT ? ", timeout" : ""); |
| 381 | |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame^] | 382 | if (unlikely(i8042_suppress_kbd_ack)) |
| 383 | if (port_no == I8042_KBD_PORT_NO && |
| 384 | (data == 0xfa || data == 0xfe)) { |
| 385 | i8042_suppress_kbd_ack = 0; |
| 386 | goto out; |
| 387 | } |
| 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (likely(port->exists)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 390 | serio_interrupt(port->serio, data, dfl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 392 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | return IRQ_RETVAL(ret); |
| 394 | } |
| 395 | |
| 396 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 397 | * i8042_enable_kbd_port enables keybaord port on chip |
| 398 | */ |
| 399 | |
| 400 | static int i8042_enable_kbd_port(void) |
| 401 | { |
| 402 | i8042_ctr &= ~I8042_CTR_KBDDIS; |
| 403 | i8042_ctr |= I8042_CTR_KBDINT; |
| 404 | |
| 405 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 406 | printk(KERN_ERR "i8042.c: Failed to enable KBD port.\n"); |
| 407 | return -EIO; |
| 408 | } |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * i8042_enable_aux_port enables AUX (mouse) port on chip |
| 415 | */ |
| 416 | |
| 417 | static int i8042_enable_aux_port(void) |
| 418 | { |
| 419 | i8042_ctr &= ~I8042_CTR_AUXDIS; |
| 420 | i8042_ctr |= I8042_CTR_AUXINT; |
| 421 | |
| 422 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 423 | printk(KERN_ERR "i8042.c: Failed to enable AUX port.\n"); |
| 424 | return -EIO; |
| 425 | } |
| 426 | |
| 427 | return 0; |
| 428 | } |
| 429 | |
| 430 | /* |
| 431 | * i8042_enable_mux_ports enables 4 individual AUX ports after |
| 432 | * the controller has been switched into Multiplexed mode |
| 433 | */ |
| 434 | |
| 435 | static int i8042_enable_mux_ports(void) |
| 436 | { |
| 437 | unsigned char param; |
| 438 | int i; |
| 439 | |
| 440 | for (i = 0; i < I8042_NUM_MUX_PORTS; i++) { |
| 441 | i8042_command(¶m, I8042_CMD_MUX_PFX + i); |
| 442 | i8042_command(¶m, I8042_CMD_AUX_ENABLE); |
| 443 | } |
| 444 | |
| 445 | return i8042_enable_aux_port(); |
| 446 | } |
| 447 | |
| 448 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | * i8042_set_mux_mode checks whether the controller has an active |
| 450 | * multiplexor and puts the chip into Multiplexed (1) or Legacy (0) mode. |
| 451 | */ |
| 452 | |
| 453 | static int i8042_set_mux_mode(unsigned int mode, unsigned char *mux_version) |
| 454 | { |
| 455 | |
| 456 | unsigned char param; |
| 457 | /* |
| 458 | * Get rid of bytes in the queue. |
| 459 | */ |
| 460 | |
| 461 | i8042_flush(); |
| 462 | |
| 463 | /* |
| 464 | * Internal loopback test - send three bytes, they should come back from the |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 465 | * mouse interface, the last should be version. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | */ |
| 467 | |
| 468 | param = 0xf0; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 469 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0xf0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | return -1; |
| 471 | param = mode ? 0x56 : 0xf6; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 472 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != (mode ? 0x56 : 0xf6)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | return -1; |
| 474 | param = mode ? 0xa4 : 0xa5; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 475 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param == (mode ? 0xa4 : 0xa5)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | return -1; |
| 477 | |
| 478 | if (mux_version) |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 479 | *mux_version = param; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | |
| 481 | return 0; |
| 482 | } |
| 483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | /* |
| 485 | * i8042_check_mux() checks whether the controller supports the PS/2 Active |
| 486 | * Multiplexing specification by Synaptics, Phoenix, Insyde and |
| 487 | * LCS/Telegraphics. |
| 488 | */ |
| 489 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 490 | static int __devinit i8042_check_mux(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | { |
| 492 | unsigned char mux_version; |
| 493 | |
| 494 | if (i8042_set_mux_mode(1, &mux_version)) |
| 495 | return -1; |
| 496 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 497 | /* |
| 498 | * Workaround for interference with USB Legacy emulation |
| 499 | * that causes a v10.12 MUX to be found. |
| 500 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | if (mux_version == 0xAC) |
| 502 | return -1; |
| 503 | |
| 504 | printk(KERN_INFO "i8042.c: Detected active multiplexing controller, rev %d.%d.\n", |
| 505 | (mux_version >> 4) & 0xf, mux_version & 0xf); |
| 506 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 507 | /* |
| 508 | * Disable all muxed ports by disabling AUX. |
| 509 | */ |
| 510 | i8042_ctr |= I8042_CTR_AUXDIS; |
| 511 | i8042_ctr &= ~I8042_CTR_AUXINT; |
| 512 | |
| 513 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 514 | printk(KERN_ERR "i8042.c: Failed to disable AUX port, can't use MUX.\n"); |
| 515 | return -EIO; |
| 516 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | i8042_mux_present = 1; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | return 0; |
| 521 | } |
| 522 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 523 | /* |
| 524 | * The following is used to test AUX IRQ delivery. |
| 525 | */ |
| 526 | static struct completion i8042_aux_irq_delivered __devinitdata; |
| 527 | static int i8042_irq_being_tested __devinitdata; |
| 528 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 529 | static irqreturn_t __devinit i8042_aux_test_irq(int irq, void *dev_id) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 530 | { |
| 531 | unsigned long flags; |
| 532 | unsigned char str, data; |
| 533 | |
| 534 | spin_lock_irqsave(&i8042_lock, flags); |
| 535 | str = i8042_read_status(); |
| 536 | if (str & I8042_STR_OBF) { |
| 537 | data = i8042_read_data(); |
| 538 | if (i8042_irq_being_tested && |
| 539 | data == 0xa5 && (str & I8042_STR_AUXDATA)) |
| 540 | complete(&i8042_aux_irq_delivered); |
| 541 | } |
| 542 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 543 | |
| 544 | return IRQ_HANDLED; |
| 545 | } |
| 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | /* |
| 549 | * i8042_check_aux() applies as much paranoia as it can at detecting |
| 550 | * the presence of an AUX interface. |
| 551 | */ |
| 552 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 553 | static int __devinit i8042_check_aux(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 555 | int retval = -1; |
| 556 | int irq_registered = 0; |
| 557 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | unsigned char param; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | /* |
| 561 | * Get rid of bytes in the queue. |
| 562 | */ |
| 563 | |
| 564 | i8042_flush(); |
| 565 | |
| 566 | /* |
| 567 | * Internal loopback test - filters out AT-type i8042's. Unfortunately |
| 568 | * SiS screwed up and their 5597 doesn't support the LOOP command even |
| 569 | * though it has an AUX port. |
| 570 | */ |
| 571 | |
| 572 | param = 0x5a; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 573 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0x5a) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
| 575 | /* |
| 576 | * External connection test - filters out AT-soldered PS/2 i8042's |
| 577 | * 0x00 - no error, 0x01-0x03 - clock/data stuck, 0xff - general error |
| 578 | * 0xfa - no error on some notebooks which ignore the spec |
| 579 | * Because it's common for chipsets to return error on perfectly functioning |
| 580 | * AUX ports, we test for this only when the LOOP command failed. |
| 581 | */ |
| 582 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 583 | if (i8042_command(¶m, I8042_CMD_AUX_TEST) || |
| 584 | (param && param != 0xfa && param != 0xff)) |
| 585 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | } |
| 587 | |
| 588 | /* |
| 589 | * Bit assignment test - filters out PS/2 i8042's in AT mode |
| 590 | */ |
| 591 | |
| 592 | if (i8042_command(¶m, I8042_CMD_AUX_DISABLE)) |
| 593 | return -1; |
| 594 | if (i8042_command(¶m, I8042_CMD_CTL_RCTR) || (~param & I8042_CTR_AUXDIS)) { |
| 595 | printk(KERN_WARNING "Failed to disable AUX port, but continuing anyway... Is this a SiS?\n"); |
| 596 | printk(KERN_WARNING "If AUX port is really absent please use the 'i8042.noaux' option.\n"); |
| 597 | } |
| 598 | |
| 599 | if (i8042_command(¶m, I8042_CMD_AUX_ENABLE)) |
| 600 | return -1; |
| 601 | if (i8042_command(¶m, I8042_CMD_CTL_RCTR) || (param & I8042_CTR_AUXDIS)) |
| 602 | return -1; |
| 603 | |
| 604 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 605 | * Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and |
| 606 | * used it for a PCI card or somethig else. |
| 607 | */ |
| 608 | |
| 609 | if (i8042_noloop) { |
| 610 | /* |
| 611 | * Without LOOP command we can't test AUX IRQ delivery. Assume the port |
| 612 | * is working and hope we are right. |
| 613 | */ |
| 614 | retval = 0; |
| 615 | goto out; |
| 616 | } |
| 617 | |
| 618 | if (request_irq(I8042_AUX_IRQ, i8042_aux_test_irq, IRQF_SHARED, |
| 619 | "i8042", i8042_platform_device)) |
| 620 | goto out; |
| 621 | |
| 622 | irq_registered = 1; |
| 623 | |
| 624 | if (i8042_enable_aux_port()) |
| 625 | goto out; |
| 626 | |
| 627 | spin_lock_irqsave(&i8042_lock, flags); |
| 628 | |
| 629 | init_completion(&i8042_aux_irq_delivered); |
| 630 | i8042_irq_being_tested = 1; |
| 631 | |
| 632 | param = 0xa5; |
| 633 | retval = __i8042_command(¶m, I8042_CMD_AUX_LOOP & 0xf0ff); |
| 634 | |
| 635 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 636 | |
| 637 | if (retval) |
| 638 | goto out; |
| 639 | |
| 640 | if (wait_for_completion_timeout(&i8042_aux_irq_delivered, |
| 641 | msecs_to_jiffies(250)) == 0) { |
| 642 | /* |
| 643 | * AUX IRQ was never delivered so we need to flush the controller to |
| 644 | * get rid of the byte we put there; otherwise keyboard may not work. |
| 645 | */ |
| 646 | i8042_flush(); |
| 647 | retval = -1; |
| 648 | } |
| 649 | |
| 650 | out: |
| 651 | |
| 652 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | * Disable the interface. |
| 654 | */ |
| 655 | |
| 656 | i8042_ctr |= I8042_CTR_AUXDIS; |
| 657 | i8042_ctr &= ~I8042_CTR_AUXINT; |
| 658 | |
| 659 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 660 | retval = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 662 | if (irq_registered) |
| 663 | free_irq(I8042_AUX_IRQ, i8042_platform_device); |
| 664 | |
| 665 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | } |
| 667 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 668 | static int i8042_controller_check(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 670 | if (i8042_flush() == I8042_BUFFER_SIZE) { |
| 671 | printk(KERN_ERR "i8042.c: No controller found.\n"); |
| 672 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | } |
| 674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | return 0; |
| 676 | } |
| 677 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 678 | static int i8042_controller_selftest(void) |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 679 | { |
| 680 | unsigned char param; |
| 681 | |
| 682 | if (!i8042_reset) |
| 683 | return 0; |
| 684 | |
| 685 | if (i8042_command(¶m, I8042_CMD_CTL_TEST)) { |
| 686 | printk(KERN_ERR "i8042.c: i8042 controller self test timeout.\n"); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 687 | return -ENODEV; |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 688 | } |
| 689 | |
| 690 | if (param != I8042_RET_CTL_TEST) { |
| 691 | printk(KERN_ERR "i8042.c: i8042 controller selftest failed. (%#x != %#x)\n", |
| 692 | param, I8042_RET_CTL_TEST); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 693 | return -EIO; |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | return 0; |
| 697 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | /* |
| 700 | * i8042_controller init initializes the i8042 controller, and, |
| 701 | * most importantly, sets it into non-xlated mode if that's |
| 702 | * desired. |
| 703 | */ |
| 704 | |
| 705 | static int i8042_controller_init(void) |
| 706 | { |
| 707 | unsigned long flags; |
| 708 | |
| 709 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | * Save the CTR for restoral on unload / reboot. |
| 711 | */ |
| 712 | |
| 713 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) { |
| 714 | printk(KERN_ERR "i8042.c: Can't read CTR while initializing i8042.\n"); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 715 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | } |
| 717 | |
| 718 | i8042_initial_ctr = i8042_ctr; |
| 719 | |
| 720 | /* |
| 721 | * Disable the keyboard interface and interrupt. |
| 722 | */ |
| 723 | |
| 724 | i8042_ctr |= I8042_CTR_KBDDIS; |
| 725 | i8042_ctr &= ~I8042_CTR_KBDINT; |
| 726 | |
| 727 | /* |
| 728 | * Handle keylock. |
| 729 | */ |
| 730 | |
| 731 | spin_lock_irqsave(&i8042_lock, flags); |
| 732 | if (~i8042_read_status() & I8042_STR_KEYLOCK) { |
| 733 | if (i8042_unlock) |
| 734 | i8042_ctr |= I8042_CTR_IGNKEYLOCK; |
| 735 | else |
| 736 | printk(KERN_WARNING "i8042.c: Warning: Keylock active.\n"); |
| 737 | } |
| 738 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 739 | |
| 740 | /* |
| 741 | * If the chip is configured into nontranslated mode by the BIOS, don't |
| 742 | * bother enabling translating and be happy. |
| 743 | */ |
| 744 | |
| 745 | if (~i8042_ctr & I8042_CTR_XLATE) |
| 746 | i8042_direct = 1; |
| 747 | |
| 748 | /* |
| 749 | * Set nontranslated mode for the kbd interface if requested by an option. |
| 750 | * After this the kbd interface becomes a simple serial in/out, like the aux |
| 751 | * interface is. We don't do this by default, since it can confuse notebook |
| 752 | * BIOSes. |
| 753 | */ |
| 754 | |
| 755 | if (i8042_direct) |
| 756 | i8042_ctr &= ~I8042_CTR_XLATE; |
| 757 | |
| 758 | /* |
| 759 | * Write CTR back. |
| 760 | */ |
| 761 | |
| 762 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 763 | printk(KERN_ERR "i8042.c: Can't write CTR while initializing i8042.\n"); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 764 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | |
| 771 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 772 | * Reset the controller and reset CRT to the original value set by BIOS. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | */ |
| 774 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 775 | static void i8042_controller_reset(void) |
| 776 | { |
| 777 | i8042_flush(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
| 779 | /* |
| 780 | * Disable MUX mode if present. |
| 781 | */ |
| 782 | |
| 783 | if (i8042_mux_present) |
| 784 | i8042_set_mux_mode(0, NULL); |
| 785 | |
| 786 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 787 | * Reset the controller if requested. |
| 788 | */ |
| 789 | |
| 790 | i8042_controller_selftest(); |
| 791 | |
| 792 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | * Restore the original control register setting. |
| 794 | */ |
| 795 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 796 | if (i8042_command(&i8042_initial_ctr, I8042_CMD_CTL_WCTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | printk(KERN_WARNING "i8042.c: Can't restore CTR.\n"); |
| 798 | } |
| 799 | |
| 800 | |
| 801 | /* |
| 802 | * Here we try to reset everything back to a state in which the BIOS will be |
| 803 | * able to talk to the hardware when rebooting. |
| 804 | */ |
| 805 | |
| 806 | static void i8042_controller_cleanup(void) |
| 807 | { |
| 808 | int i; |
| 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | /* |
| 811 | * Reset anything that is connected to the ports. |
| 812 | */ |
| 813 | |
| 814 | for (i = 0; i < I8042_NUM_PORTS; i++) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 815 | if (i8042_ports[i].serio) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | serio_cleanup(i8042_ports[i].serio); |
| 817 | |
| 818 | i8042_controller_reset(); |
| 819 | } |
| 820 | |
| 821 | |
| 822 | /* |
| 823 | * i8042_panic_blink() will flash the keyboard LEDs and is called when |
| 824 | * kernel panics. Flashing LEDs is useful for users running X who may |
| 825 | * not see the console and will help distingushing panics from "real" |
| 826 | * lockups. |
| 827 | * |
| 828 | * Note that DELAY has a limit of 10ms so we will not get stuck here |
| 829 | * waiting for KBC to free up even if KBD interrupt is off |
| 830 | */ |
| 831 | |
| 832 | #define DELAY do { mdelay(1); if (++delay > 10) return delay; } while(0) |
| 833 | |
| 834 | static long i8042_panic_blink(long count) |
| 835 | { |
| 836 | long delay = 0; |
| 837 | static long last_blink; |
| 838 | static char led; |
| 839 | |
| 840 | /* |
| 841 | * We expect frequency to be about 1/2s. KDB uses about 1s. |
| 842 | * Make sure they are different. |
| 843 | */ |
| 844 | if (!i8042_blink_frequency) |
| 845 | return 0; |
| 846 | if (count - last_blink < i8042_blink_frequency) |
| 847 | return 0; |
| 848 | |
| 849 | led ^= 0x01 | 0x04; |
| 850 | while (i8042_read_status() & I8042_STR_IBF) |
| 851 | DELAY; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame^] | 852 | i8042_suppress_kbd_ack = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | i8042_write_data(0xed); /* set leds */ |
| 854 | DELAY; |
| 855 | while (i8042_read_status() & I8042_STR_IBF) |
| 856 | DELAY; |
| 857 | DELAY; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame^] | 858 | i8042_suppress_kbd_ack = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | i8042_write_data(led); |
| 860 | DELAY; |
| 861 | last_blink = count; |
| 862 | return delay; |
| 863 | } |
| 864 | |
| 865 | #undef DELAY |
| 866 | |
| 867 | /* |
| 868 | * Here we try to restore the original BIOS settings |
| 869 | */ |
| 870 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 871 | static int i8042_suspend(struct platform_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 873 | i8042_controller_cleanup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | |
| 875 | return 0; |
| 876 | } |
| 877 | |
| 878 | |
| 879 | /* |
| 880 | * Here we try to reset everything back to a state in which suspended |
| 881 | */ |
| 882 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 883 | static int i8042_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 885 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 887 | error = i8042_controller_check(); |
| 888 | if (error) |
| 889 | return error; |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 890 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 891 | error = i8042_controller_selftest(); |
| 892 | if (error) |
| 893 | return error; |
| 894 | |
| 895 | /* |
| 896 | * Restore pre-resume CTR value and disable all ports |
| 897 | */ |
| 898 | |
| 899 | i8042_ctr |= I8042_CTR_AUXDIS | I8042_CTR_KBDDIS; |
| 900 | i8042_ctr &= ~(I8042_CTR_AUXINT | I8042_CTR_KBDINT); |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 901 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 902 | printk(KERN_ERR "i8042: Can't write CTR to resume\n"); |
| 903 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | } |
| 905 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 906 | if (i8042_mux_present) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | if (i8042_set_mux_mode(1, NULL) || i8042_enable_mux_ports()) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 908 | printk(KERN_WARNING |
| 909 | "i8042: failed to resume active multiplexor, " |
| 910 | "mouse won't work.\n"); |
| 911 | } else if (i8042_ports[I8042_AUX_PORT_NO].serio) |
| 912 | i8042_enable_aux_port(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 914 | if (i8042_ports[I8042_KBD_PORT_NO].serio) |
| 915 | i8042_enable_kbd_port(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 917 | i8042_interrupt(0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
| 919 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | } |
| 921 | |
| 922 | /* |
| 923 | * We need to reset the 8042 back to original mode on system shutdown, |
| 924 | * because otherwise BIOSes will be confused. |
| 925 | */ |
| 926 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 927 | static void i8042_shutdown(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | { |
| 929 | i8042_controller_cleanup(); |
| 930 | } |
| 931 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 932 | static int __devinit i8042_create_kbd_port(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
| 934 | struct serio *serio; |
| 935 | struct i8042_port *port = &i8042_ports[I8042_KBD_PORT_NO]; |
| 936 | |
Dmitry Torokhov | d39969d | 2005-09-10 12:04:42 -0500 | [diff] [blame] | 937 | serio = kzalloc(sizeof(struct serio), GFP_KERNEL); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 938 | if (!serio) |
| 939 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 941 | serio->id.type = i8042_direct ? SERIO_8042 : SERIO_8042_XL; |
| 942 | serio->write = i8042_dumbkbd ? NULL : i8042_kbd_write; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 943 | serio->start = i8042_start; |
| 944 | serio->stop = i8042_stop; |
| 945 | serio->port_data = port; |
| 946 | serio->dev.parent = &i8042_platform_device->dev; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 947 | strlcpy(serio->name, "i8042 KBD port", sizeof(serio->name)); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 948 | strlcpy(serio->phys, I8042_KBD_PHYS_DESC, sizeof(serio->phys)); |
| 949 | |
| 950 | port->serio = serio; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 951 | port->irq = I8042_KBD_IRQ; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 952 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 953 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | } |
| 955 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 956 | static int __devinit i8042_create_aux_port(int idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | { |
| 958 | struct serio *serio; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 959 | int port_no = idx < 0 ? I8042_AUX_PORT_NO : I8042_MUX_PORT_NO + idx; |
| 960 | struct i8042_port *port = &i8042_ports[port_no]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
Dmitry Torokhov | d39969d | 2005-09-10 12:04:42 -0500 | [diff] [blame] | 962 | serio = kzalloc(sizeof(struct serio), GFP_KERNEL); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 963 | if (!serio) |
| 964 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 966 | serio->id.type = SERIO_8042; |
| 967 | serio->write = i8042_aux_write; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 968 | serio->start = i8042_start; |
| 969 | serio->stop = i8042_stop; |
| 970 | serio->port_data = port; |
| 971 | serio->dev.parent = &i8042_platform_device->dev; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 972 | if (idx < 0) { |
| 973 | strlcpy(serio->name, "i8042 AUX port", sizeof(serio->name)); |
| 974 | strlcpy(serio->phys, I8042_AUX_PHYS_DESC, sizeof(serio->phys)); |
| 975 | } else { |
| 976 | snprintf(serio->name, sizeof(serio->name), "i8042 AUX%d port", idx); |
| 977 | snprintf(serio->phys, sizeof(serio->phys), I8042_MUX_PHYS_DESC, idx + 1); |
| 978 | } |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 979 | |
| 980 | port->serio = serio; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 981 | port->mux = idx; |
| 982 | port->irq = I8042_AUX_IRQ; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 983 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 984 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | } |
| 986 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 987 | static void __devinit i8042_free_kbd_port(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 989 | kfree(i8042_ports[I8042_KBD_PORT_NO].serio); |
| 990 | i8042_ports[I8042_KBD_PORT_NO].serio = NULL; |
| 991 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 993 | static void __devinit i8042_free_aux_ports(void) |
| 994 | { |
| 995 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 997 | for (i = I8042_AUX_PORT_NO; i < I8042_NUM_PORTS; i++) { |
| 998 | kfree(i8042_ports[i].serio); |
| 999 | i8042_ports[i].serio = NULL; |
| 1000 | } |
| 1001 | } |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 1002 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1003 | static void __devinit i8042_register_ports(void) |
| 1004 | { |
| 1005 | int i; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 1006 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1007 | for (i = 0; i < I8042_NUM_PORTS; i++) { |
| 1008 | if (i8042_ports[i].serio) { |
| 1009 | printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n", |
| 1010 | i8042_ports[i].serio->name, |
| 1011 | (unsigned long) I8042_DATA_REG, |
| 1012 | (unsigned long) I8042_COMMAND_REG, |
| 1013 | i8042_ports[i].irq); |
| 1014 | serio_register_port(i8042_ports[i].serio); |
| 1015 | } |
| 1016 | } |
| 1017 | } |
| 1018 | |
| 1019 | static void __devinit i8042_unregister_ports(void) |
| 1020 | { |
| 1021 | int i; |
| 1022 | |
| 1023 | for (i = 0; i < I8042_NUM_PORTS; i++) { |
| 1024 | if (i8042_ports[i].serio) { |
| 1025 | serio_unregister_port(i8042_ports[i].serio); |
| 1026 | i8042_ports[i].serio = NULL; |
| 1027 | } |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | static void i8042_free_irqs(void) |
| 1032 | { |
| 1033 | if (i8042_aux_irq_registered) |
| 1034 | free_irq(I8042_AUX_IRQ, i8042_platform_device); |
| 1035 | if (i8042_kbd_irq_registered) |
| 1036 | free_irq(I8042_KBD_IRQ, i8042_platform_device); |
| 1037 | |
| 1038 | i8042_aux_irq_registered = i8042_kbd_irq_registered = 0; |
| 1039 | } |
| 1040 | |
| 1041 | static int __devinit i8042_setup_aux(void) |
| 1042 | { |
| 1043 | int (*aux_enable)(void); |
| 1044 | int error; |
| 1045 | int i; |
| 1046 | |
| 1047 | if (i8042_check_aux()) |
| 1048 | return -ENODEV; |
| 1049 | |
| 1050 | if (i8042_nomux || i8042_check_mux()) { |
| 1051 | error = i8042_create_aux_port(-1); |
| 1052 | if (error) |
| 1053 | goto err_free_ports; |
| 1054 | aux_enable = i8042_enable_aux_port; |
| 1055 | } else { |
| 1056 | for (i = 0; i < I8042_NUM_MUX_PORTS; i++) { |
| 1057 | error = i8042_create_aux_port(i); |
| 1058 | if (error) |
| 1059 | goto err_free_ports; |
| 1060 | } |
| 1061 | aux_enable = i8042_enable_mux_ports; |
| 1062 | } |
| 1063 | |
| 1064 | error = request_irq(I8042_AUX_IRQ, i8042_interrupt, IRQF_SHARED, |
| 1065 | "i8042", i8042_platform_device); |
| 1066 | if (error) |
| 1067 | goto err_free_ports; |
| 1068 | |
| 1069 | if (aux_enable()) |
| 1070 | goto err_free_irq; |
| 1071 | |
| 1072 | i8042_aux_irq_registered = 1; |
| 1073 | return 0; |
| 1074 | |
| 1075 | err_free_irq: |
| 1076 | free_irq(I8042_AUX_IRQ, i8042_platform_device); |
| 1077 | err_free_ports: |
| 1078 | i8042_free_aux_ports(); |
| 1079 | return error; |
| 1080 | } |
| 1081 | |
| 1082 | static int __devinit i8042_setup_kbd(void) |
| 1083 | { |
| 1084 | int error; |
| 1085 | |
| 1086 | error = i8042_create_kbd_port(); |
| 1087 | if (error) |
| 1088 | return error; |
| 1089 | |
| 1090 | error = request_irq(I8042_KBD_IRQ, i8042_interrupt, IRQF_SHARED, |
| 1091 | "i8042", i8042_platform_device); |
| 1092 | if (error) |
| 1093 | goto err_free_port; |
| 1094 | |
| 1095 | error = i8042_enable_kbd_port(); |
| 1096 | if (error) |
| 1097 | goto err_free_irq; |
| 1098 | |
| 1099 | i8042_kbd_irq_registered = 1; |
| 1100 | return 0; |
| 1101 | |
| 1102 | err_free_irq: |
| 1103 | free_irq(I8042_KBD_IRQ, i8042_platform_device); |
| 1104 | err_free_port: |
| 1105 | i8042_free_kbd_port(); |
| 1106 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | } |
| 1108 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1109 | static int __devinit i8042_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1111 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1113 | error = i8042_controller_selftest(); |
| 1114 | if (error) |
| 1115 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1117 | error = i8042_controller_init(); |
| 1118 | if (error) |
| 1119 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1121 | if (!i8042_noaux) { |
| 1122 | error = i8042_setup_aux(); |
| 1123 | if (error && error != -ENODEV && error != -EBUSY) |
| 1124 | goto out_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | } |
| 1126 | |
Dmitry Torokhov | 945ef0d | 2005-09-04 01:42:00 -0500 | [diff] [blame] | 1127 | if (!i8042_nokbd) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1128 | error = i8042_setup_kbd(); |
| 1129 | if (error) |
| 1130 | goto out_fail; |
Dmitry Torokhov | 945ef0d | 2005-09-04 01:42:00 -0500 | [diff] [blame] | 1131 | } |
| 1132 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1133 | /* |
| 1134 | * Ok, everything is ready, let's register all serio ports |
| 1135 | */ |
| 1136 | i8042_register_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | return 0; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 1139 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1140 | out_fail: |
| 1141 | i8042_free_aux_ports(); /* in case KBD failed but AUX not */ |
| 1142 | i8042_free_irqs(); |
| 1143 | i8042_controller_reset(); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 1144 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1145 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | } |
| 1147 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1148 | static int __devexit i8042_remove(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1150 | i8042_unregister_ports(); |
| 1151 | i8042_free_irqs(); |
| 1152 | i8042_controller_reset(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1154 | return 0; |
| 1155 | } |
| 1156 | |
| 1157 | static struct platform_driver i8042_driver = { |
| 1158 | .driver = { |
| 1159 | .name = "i8042", |
| 1160 | .owner = THIS_MODULE, |
| 1161 | }, |
| 1162 | .probe = i8042_probe, |
| 1163 | .remove = __devexit_p(i8042_remove), |
| 1164 | .suspend = i8042_suspend, |
| 1165 | .resume = i8042_resume, |
| 1166 | .shutdown = i8042_shutdown, |
| 1167 | }; |
| 1168 | |
| 1169 | static int __init i8042_init(void) |
| 1170 | { |
| 1171 | int err; |
| 1172 | |
| 1173 | dbg_init(); |
| 1174 | |
| 1175 | err = i8042_platform_init(); |
| 1176 | if (err) |
| 1177 | return err; |
| 1178 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1179 | err = i8042_controller_check(); |
| 1180 | if (err) |
| 1181 | goto err_platform_exit; |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1182 | |
| 1183 | err = platform_driver_register(&i8042_driver); |
| 1184 | if (err) |
| 1185 | goto err_platform_exit; |
| 1186 | |
| 1187 | i8042_platform_device = platform_device_alloc("i8042", -1); |
| 1188 | if (!i8042_platform_device) { |
| 1189 | err = -ENOMEM; |
| 1190 | goto err_unregister_driver; |
| 1191 | } |
| 1192 | |
| 1193 | err = platform_device_add(i8042_platform_device); |
| 1194 | if (err) |
| 1195 | goto err_free_device; |
| 1196 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1197 | panic_blink = i8042_panic_blink; |
| 1198 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1199 | return 0; |
| 1200 | |
| 1201 | err_free_device: |
| 1202 | platform_device_put(i8042_platform_device); |
| 1203 | err_unregister_driver: |
| 1204 | platform_driver_unregister(&i8042_driver); |
| 1205 | err_platform_exit: |
| 1206 | i8042_platform_exit(); |
| 1207 | |
| 1208 | return err; |
| 1209 | } |
| 1210 | |
| 1211 | static void __exit i8042_exit(void) |
| 1212 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | platform_device_unregister(i8042_platform_device); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1214 | platform_driver_unregister(&i8042_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | i8042_platform_exit(); |
| 1216 | |
| 1217 | panic_blink = NULL; |
| 1218 | } |
| 1219 | |
| 1220 | module_init(i8042_init); |
| 1221 | module_exit(i8042_exit); |