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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #include "i8042.h" |
| 80 | |
| 81 | static DEFINE_SPINLOCK(i8042_lock); |
| 82 | |
| 83 | struct i8042_port { |
| 84 | struct serio *serio; |
| 85 | int irq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | unsigned char exists; |
| 87 | signed char mux; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | }; |
| 89 | |
| 90 | #define I8042_KBD_PORT_NO 0 |
| 91 | #define I8042_AUX_PORT_NO 1 |
| 92 | #define I8042_MUX_PORT_NO 2 |
| 93 | #define I8042_NUM_PORTS (I8042_NUM_MUX_PORTS + 2) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 94 | |
| 95 | static struct i8042_port i8042_ports[I8042_NUM_PORTS]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | static unsigned char i8042_initial_ctr; |
| 98 | static unsigned char i8042_ctr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | static unsigned char i8042_mux_present; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 100 | static unsigned char i8042_kbd_irq_registered; |
| 101 | static unsigned char i8042_aux_irq_registered; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame] | 102 | static unsigned char i8042_suppress_kbd_ack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | static struct platform_device *i8042_platform_device; |
| 104 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 105 | static irqreturn_t i8042_interrupt(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
| 107 | /* |
| 108 | * The i8042_wait_read() and i8042_wait_write functions wait for the i8042 to |
| 109 | * be ready for reading values from it / writing values to it. |
| 110 | * Called always with i8042_lock held. |
| 111 | */ |
| 112 | |
| 113 | static int i8042_wait_read(void) |
| 114 | { |
| 115 | int i = 0; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | while ((~i8042_read_status() & I8042_STR_OBF) && (i < I8042_CTL_TIMEOUT)) { |
| 118 | udelay(50); |
| 119 | i++; |
| 120 | } |
| 121 | return -(i == I8042_CTL_TIMEOUT); |
| 122 | } |
| 123 | |
| 124 | static int i8042_wait_write(void) |
| 125 | { |
| 126 | int i = 0; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | while ((i8042_read_status() & I8042_STR_IBF) && (i < I8042_CTL_TIMEOUT)) { |
| 129 | udelay(50); |
| 130 | i++; |
| 131 | } |
| 132 | return -(i == I8042_CTL_TIMEOUT); |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * i8042_flush() flushes all data that may be in the keyboard and mouse buffers |
| 137 | * of the i8042 down the toilet. |
| 138 | */ |
| 139 | |
| 140 | static int i8042_flush(void) |
| 141 | { |
| 142 | unsigned long flags; |
| 143 | unsigned char data, str; |
| 144 | int i = 0; |
| 145 | |
| 146 | spin_lock_irqsave(&i8042_lock, flags); |
| 147 | |
| 148 | while (((str = i8042_read_status()) & I8042_STR_OBF) && (i < I8042_BUFFER_SIZE)) { |
| 149 | udelay(50); |
| 150 | data = i8042_read_data(); |
| 151 | i++; |
| 152 | dbg("%02x <- i8042 (flush, %s)", data, |
| 153 | str & I8042_STR_AUXDATA ? "aux" : "kbd"); |
| 154 | } |
| 155 | |
| 156 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 157 | |
| 158 | return i; |
| 159 | } |
| 160 | |
| 161 | /* |
| 162 | * i8042_command() executes a command on the i8042. It also sends the input |
| 163 | * parameter(s) of the commands to it, and receives the output value(s). The |
| 164 | * parameters are to be stored in the param array, and the output is placed |
| 165 | * into the same array. The number of the parameters and output values is |
| 166 | * encoded in bits 8-11 of the command number. |
| 167 | */ |
| 168 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 169 | static int __i8042_command(unsigned char *param, int command) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 171 | int i, error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | if (i8042_noloop && command == I8042_CMD_AUX_LOOP) |
| 174 | return -1; |
| 175 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 176 | error = i8042_wait_write(); |
| 177 | if (error) |
| 178 | return error; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 179 | |
| 180 | dbg("%02x -> i8042 (command)", command & 0xff); |
| 181 | i8042_write_command(command & 0xff); |
| 182 | |
| 183 | for (i = 0; i < ((command >> 12) & 0xf); i++) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 184 | error = i8042_wait_write(); |
| 185 | if (error) |
| 186 | return error; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 187 | dbg("%02x -> i8042 (parameter)", param[i]); |
| 188 | i8042_write_data(param[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | } |
| 190 | |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 191 | for (i = 0; i < ((command >> 8) & 0xf); i++) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 192 | error = i8042_wait_read(); |
| 193 | if (error) { |
| 194 | dbg(" -- i8042 (timeout)"); |
| 195 | return error; |
| 196 | } |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 197 | |
| 198 | if (command == I8042_CMD_AUX_LOOP && |
| 199 | !(i8042_read_status() & I8042_STR_AUXDATA)) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 200 | dbg(" -- i8042 (auxerr)"); |
| 201 | return -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 204 | param[i] = i8042_read_data(); |
| 205 | dbg("%02x <- i8042 (return)", param[i]); |
| 206 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 208 | return 0; |
| 209 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 211 | static int i8042_command(unsigned char *param, int command) |
| 212 | { |
| 213 | unsigned long flags; |
| 214 | int retval; |
| 215 | |
| 216 | spin_lock_irqsave(&i8042_lock, flags); |
| 217 | retval = __i8042_command(param, command); |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 218 | spin_unlock_irqrestore(&i8042_lock, flags); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return retval; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * i8042_kbd_write() sends a byte out through the keyboard interface. |
| 225 | */ |
| 226 | |
| 227 | static int i8042_kbd_write(struct serio *port, unsigned char c) |
| 228 | { |
| 229 | unsigned long flags; |
| 230 | int retval = 0; |
| 231 | |
| 232 | spin_lock_irqsave(&i8042_lock, flags); |
| 233 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 234 | if (!(retval = i8042_wait_write())) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | dbg("%02x -> i8042 (kbd-data)", c); |
| 236 | i8042_write_data(c); |
| 237 | } |
| 238 | |
| 239 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 240 | |
| 241 | return retval; |
| 242 | } |
| 243 | |
| 244 | /* |
| 245 | * i8042_aux_write() sends a byte out through the aux interface. |
| 246 | */ |
| 247 | |
| 248 | static int i8042_aux_write(struct serio *serio, unsigned char c) |
| 249 | { |
| 250 | struct i8042_port *port = serio->port_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | |
Dmitry Torokhov | f4e3c71 | 2006-11-02 23:27:49 -0500 | [diff] [blame] | 252 | return i8042_command(&c, port->mux == -1 ? |
| 253 | I8042_CMD_AUX_SEND : |
| 254 | I8042_CMD_MUX_SEND + port->mux); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | } |
| 256 | |
| 257 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | * i8042_start() is called by serio core when port is about to finish |
| 259 | * registering. It will mark port as existing so i8042_interrupt can |
| 260 | * start sending data through it. |
| 261 | */ |
| 262 | static int i8042_start(struct serio *serio) |
| 263 | { |
| 264 | struct i8042_port *port = serio->port_data; |
| 265 | |
| 266 | port->exists = 1; |
| 267 | mb(); |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * i8042_stop() marks serio port as non-existing so i8042_interrupt |
| 273 | * will not try to send data to the port that is about to go away. |
| 274 | * The function is called by serio core as part of unregister procedure. |
| 275 | */ |
| 276 | static void i8042_stop(struct serio *serio) |
| 277 | { |
| 278 | struct i8042_port *port = serio->port_data; |
| 279 | |
| 280 | port->exists = 0; |
Paul E. McKenney | b2b1866 | 2005-06-25 14:55:38 -0700 | [diff] [blame] | 281 | synchronize_sched(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | port->serio = NULL; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * i8042_interrupt() is the most important function in this driver - |
| 287 | * it handles the interrupts from the i8042, and sends incoming bytes |
| 288 | * to the upper layers. |
| 289 | */ |
| 290 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 291 | static irqreturn_t i8042_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
| 293 | struct i8042_port *port; |
| 294 | unsigned long flags; |
| 295 | unsigned char str, data; |
| 296 | unsigned int dfl; |
| 297 | unsigned int port_no; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame] | 298 | int ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | spin_lock_irqsave(&i8042_lock, flags); |
| 301 | str = i8042_read_status(); |
| 302 | if (unlikely(~str & I8042_STR_OBF)) { |
| 303 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 304 | if (irq) dbg("Interrupt %d, without any data", irq); |
| 305 | ret = 0; |
| 306 | goto out; |
| 307 | } |
| 308 | data = i8042_read_data(); |
| 309 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 310 | |
| 311 | if (i8042_mux_present && (str & I8042_STR_AUXDATA)) { |
| 312 | static unsigned long last_transmit; |
| 313 | static unsigned char last_str; |
| 314 | |
| 315 | dfl = 0; |
| 316 | if (str & I8042_STR_MUXERR) { |
| 317 | dbg("MUX error, status is %02x, data is %02x", str, data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | /* |
| 319 | * When MUXERR condition is signalled the data register can only contain |
| 320 | * 0xfd, 0xfe or 0xff if implementation follows the spec. Unfortunately |
Dmitry Torokhov | a216a4b | 2006-11-17 01:07:06 -0500 | [diff] [blame] | 321 | * it is not always the case. Some KBCs also report 0xfc when there is |
| 322 | * nothing connected to the port while others sometimes get confused which |
| 323 | * port the data came from and signal error leaving the data intact. They |
| 324 | * _do not_ revert to legacy mode (actually I've never seen KBC reverting |
| 325 | * to legacy mode yet, when we see one we'll add proper handling). |
| 326 | * Anyway, we process 0xfc, 0xfd, 0xfe and 0xff as timeouts, and for the |
| 327 | * rest assume that the data came from the same serio last byte |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | * was transmitted (if transmission happened not too long ago). |
| 329 | */ |
Dmitry Torokhov | a216a4b | 2006-11-17 01:07:06 -0500 | [diff] [blame] | 330 | |
| 331 | switch (data) { |
| 332 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | if (time_before(jiffies, last_transmit + HZ/10)) { |
| 334 | str = last_str; |
| 335 | break; |
| 336 | } |
| 337 | /* fall through - report timeout */ |
Dmitry Torokhov | a216a4b | 2006-11-17 01:07:06 -0500 | [diff] [blame] | 338 | case 0xfc: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | case 0xfd: |
| 340 | case 0xfe: dfl = SERIO_TIMEOUT; data = 0xfe; break; |
| 341 | case 0xff: dfl = SERIO_PARITY; data = 0xfe; break; |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | port_no = I8042_MUX_PORT_NO + ((str >> 6) & 3); |
| 346 | last_str = str; |
| 347 | last_transmit = jiffies; |
| 348 | } else { |
| 349 | |
| 350 | dfl = ((str & I8042_STR_PARITY) ? SERIO_PARITY : 0) | |
| 351 | ((str & I8042_STR_TIMEOUT) ? SERIO_TIMEOUT : 0); |
| 352 | |
| 353 | port_no = (str & I8042_STR_AUXDATA) ? |
| 354 | I8042_AUX_PORT_NO : I8042_KBD_PORT_NO; |
| 355 | } |
| 356 | |
| 357 | port = &i8042_ports[port_no]; |
| 358 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 359 | dbg("%02x <- i8042 (interrupt, %d, %d%s%s)", |
| 360 | data, port_no, irq, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | dfl & SERIO_PARITY ? ", bad parity" : "", |
| 362 | dfl & SERIO_TIMEOUT ? ", timeout" : ""); |
| 363 | |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame] | 364 | if (unlikely(i8042_suppress_kbd_ack)) |
| 365 | if (port_no == I8042_KBD_PORT_NO && |
| 366 | (data == 0xfa || data == 0xfe)) { |
Dmitry Torokhov | 19f3c3e | 2007-01-18 00:42:31 -0500 | [diff] [blame] | 367 | i8042_suppress_kbd_ack--; |
Dmitry Torokhov | 817e6ba | 2006-10-11 01:44:28 -0400 | [diff] [blame] | 368 | goto out; |
| 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | if (likely(port->exists)) |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 372 | serio_interrupt(port->serio, data, dfl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 374 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | return IRQ_RETVAL(ret); |
| 376 | } |
| 377 | |
| 378 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 379 | * i8042_enable_kbd_port enables keybaord port on chip |
| 380 | */ |
| 381 | |
| 382 | static int i8042_enable_kbd_port(void) |
| 383 | { |
| 384 | i8042_ctr &= ~I8042_CTR_KBDDIS; |
| 385 | i8042_ctr |= I8042_CTR_KBDINT; |
| 386 | |
| 387 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 388 | printk(KERN_ERR "i8042.c: Failed to enable KBD port.\n"); |
| 389 | return -EIO; |
| 390 | } |
| 391 | |
| 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | /* |
| 396 | * i8042_enable_aux_port enables AUX (mouse) port on chip |
| 397 | */ |
| 398 | |
| 399 | static int i8042_enable_aux_port(void) |
| 400 | { |
| 401 | i8042_ctr &= ~I8042_CTR_AUXDIS; |
| 402 | i8042_ctr |= I8042_CTR_AUXINT; |
| 403 | |
| 404 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 405 | printk(KERN_ERR "i8042.c: Failed to enable AUX port.\n"); |
| 406 | return -EIO; |
| 407 | } |
| 408 | |
| 409 | return 0; |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * i8042_enable_mux_ports enables 4 individual AUX ports after |
| 414 | * the controller has been switched into Multiplexed mode |
| 415 | */ |
| 416 | |
| 417 | static int i8042_enable_mux_ports(void) |
| 418 | { |
| 419 | unsigned char param; |
| 420 | int i; |
| 421 | |
| 422 | for (i = 0; i < I8042_NUM_MUX_PORTS; i++) { |
| 423 | i8042_command(¶m, I8042_CMD_MUX_PFX + i); |
| 424 | i8042_command(¶m, I8042_CMD_AUX_ENABLE); |
| 425 | } |
| 426 | |
| 427 | return i8042_enable_aux_port(); |
| 428 | } |
| 429 | |
| 430 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | * i8042_set_mux_mode checks whether the controller has an active |
| 432 | * multiplexor and puts the chip into Multiplexed (1) or Legacy (0) mode. |
| 433 | */ |
| 434 | |
| 435 | static int i8042_set_mux_mode(unsigned int mode, unsigned char *mux_version) |
| 436 | { |
| 437 | |
| 438 | unsigned char param; |
| 439 | /* |
| 440 | * Get rid of bytes in the queue. |
| 441 | */ |
| 442 | |
| 443 | i8042_flush(); |
| 444 | |
| 445 | /* |
| 446 | * Internal loopback test - send three bytes, they should come back from the |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 447 | * mouse interface, the last should be version. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | */ |
| 449 | |
| 450 | param = 0xf0; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 451 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0xf0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | return -1; |
| 453 | param = mode ? 0x56 : 0xf6; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 454 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != (mode ? 0x56 : 0xf6)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | return -1; |
| 456 | param = mode ? 0xa4 : 0xa5; |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 457 | if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param == (mode ? 0xa4 : 0xa5)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | return -1; |
| 459 | |
| 460 | if (mux_version) |
Dmitry Torokhov | 463a4f7 | 2005-07-15 01:51:56 -0500 | [diff] [blame] | 461 | *mux_version = param; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | return 0; |
| 464 | } |
| 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | /* |
| 467 | * i8042_check_mux() checks whether the controller supports the PS/2 Active |
| 468 | * Multiplexing specification by Synaptics, Phoenix, Insyde and |
| 469 | * LCS/Telegraphics. |
| 470 | */ |
| 471 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 472 | static int __devinit i8042_check_mux(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | { |
| 474 | unsigned char mux_version; |
| 475 | |
| 476 | if (i8042_set_mux_mode(1, &mux_version)) |
| 477 | return -1; |
| 478 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 479 | /* |
| 480 | * Workaround for interference with USB Legacy emulation |
| 481 | * that causes a v10.12 MUX to be found. |
| 482 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | if (mux_version == 0xAC) |
| 484 | return -1; |
| 485 | |
| 486 | printk(KERN_INFO "i8042.c: Detected active multiplexing controller, rev %d.%d.\n", |
| 487 | (mux_version >> 4) & 0xf, mux_version & 0xf); |
| 488 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 489 | /* |
| 490 | * Disable all muxed ports by disabling AUX. |
| 491 | */ |
| 492 | i8042_ctr |= I8042_CTR_AUXDIS; |
| 493 | i8042_ctr &= ~I8042_CTR_AUXINT; |
| 494 | |
| 495 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 496 | printk(KERN_ERR "i8042.c: Failed to disable AUX port, can't use MUX.\n"); |
| 497 | return -EIO; |
| 498 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
| 500 | i8042_mux_present = 1; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | return 0; |
| 503 | } |
| 504 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 505 | /* |
| 506 | * The following is used to test AUX IRQ delivery. |
| 507 | */ |
| 508 | static struct completion i8042_aux_irq_delivered __devinitdata; |
| 509 | static int i8042_irq_being_tested __devinitdata; |
| 510 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 511 | 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] | 512 | { |
| 513 | unsigned long flags; |
| 514 | unsigned char str, data; |
| 515 | |
| 516 | spin_lock_irqsave(&i8042_lock, flags); |
| 517 | str = i8042_read_status(); |
| 518 | if (str & I8042_STR_OBF) { |
| 519 | data = i8042_read_data(); |
| 520 | if (i8042_irq_being_tested && |
| 521 | data == 0xa5 && (str & I8042_STR_AUXDATA)) |
| 522 | complete(&i8042_aux_irq_delivered); |
| 523 | } |
| 524 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 525 | |
| 526 | return IRQ_HANDLED; |
| 527 | } |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
| 530 | /* |
| 531 | * i8042_check_aux() applies as much paranoia as it can at detecting |
| 532 | * the presence of an AUX interface. |
| 533 | */ |
| 534 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 535 | static int __devinit i8042_check_aux(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 537 | int retval = -1; |
| 538 | int irq_registered = 0; |
Dmitry Torokhov | 1e4865f | 2007-02-10 01:29:53 -0500 | [diff] [blame] | 539 | int aux_loop_broken = 0; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 540 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | unsigned char param; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | /* |
| 544 | * Get rid of bytes in the queue. |
| 545 | */ |
| 546 | |
| 547 | i8042_flush(); |
| 548 | |
| 549 | /* |
| 550 | * Internal loopback test - filters out AT-type i8042's. Unfortunately |
| 551 | * SiS screwed up and their 5597 doesn't support the LOOP command even |
| 552 | * though it has an AUX port. |
| 553 | */ |
| 554 | |
| 555 | param = 0x5a; |
Dmitry Torokhov | 3ca5de6 | 2007-03-07 23:20:55 -0500 | [diff] [blame^] | 556 | retval = i8042_command(¶m, I8042_CMD_AUX_LOOP); |
| 557 | if (retval || param != 0x5a) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | |
| 559 | /* |
| 560 | * External connection test - filters out AT-soldered PS/2 i8042's |
| 561 | * 0x00 - no error, 0x01-0x03 - clock/data stuck, 0xff - general error |
| 562 | * 0xfa - no error on some notebooks which ignore the spec |
| 563 | * Because it's common for chipsets to return error on perfectly functioning |
| 564 | * AUX ports, we test for this only when the LOOP command failed. |
| 565 | */ |
| 566 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 567 | if (i8042_command(¶m, I8042_CMD_AUX_TEST) || |
| 568 | (param && param != 0xfa && param != 0xff)) |
| 569 | return -1; |
Dmitry Torokhov | 1e4865f | 2007-02-10 01:29:53 -0500 | [diff] [blame] | 570 | |
Dmitry Torokhov | 3ca5de6 | 2007-03-07 23:20:55 -0500 | [diff] [blame^] | 571 | /* |
| 572 | * If AUX_LOOP completed without error but returned unexpected data |
| 573 | * mark it as broken |
| 574 | */ |
| 575 | if (!retval) |
| 576 | aux_loop_broken = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | /* |
| 580 | * Bit assignment test - filters out PS/2 i8042's in AT mode |
| 581 | */ |
| 582 | |
| 583 | if (i8042_command(¶m, I8042_CMD_AUX_DISABLE)) |
| 584 | return -1; |
| 585 | if (i8042_command(¶m, I8042_CMD_CTL_RCTR) || (~param & I8042_CTR_AUXDIS)) { |
| 586 | printk(KERN_WARNING "Failed to disable AUX port, but continuing anyway... Is this a SiS?\n"); |
| 587 | printk(KERN_WARNING "If AUX port is really absent please use the 'i8042.noaux' option.\n"); |
| 588 | } |
| 589 | |
| 590 | if (i8042_command(¶m, I8042_CMD_AUX_ENABLE)) |
| 591 | return -1; |
| 592 | if (i8042_command(¶m, I8042_CMD_CTL_RCTR) || (param & I8042_CTR_AUXDIS)) |
| 593 | return -1; |
| 594 | |
| 595 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 596 | * Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and |
| 597 | * used it for a PCI card or somethig else. |
| 598 | */ |
| 599 | |
Dmitry Torokhov | 1e4865f | 2007-02-10 01:29:53 -0500 | [diff] [blame] | 600 | if (i8042_noloop || aux_loop_broken) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 601 | /* |
| 602 | * Without LOOP command we can't test AUX IRQ delivery. Assume the port |
| 603 | * is working and hope we are right. |
| 604 | */ |
| 605 | retval = 0; |
| 606 | goto out; |
| 607 | } |
| 608 | |
| 609 | if (request_irq(I8042_AUX_IRQ, i8042_aux_test_irq, IRQF_SHARED, |
| 610 | "i8042", i8042_platform_device)) |
| 611 | goto out; |
| 612 | |
| 613 | irq_registered = 1; |
| 614 | |
| 615 | if (i8042_enable_aux_port()) |
| 616 | goto out; |
| 617 | |
| 618 | spin_lock_irqsave(&i8042_lock, flags); |
| 619 | |
| 620 | init_completion(&i8042_aux_irq_delivered); |
| 621 | i8042_irq_being_tested = 1; |
| 622 | |
| 623 | param = 0xa5; |
| 624 | retval = __i8042_command(¶m, I8042_CMD_AUX_LOOP & 0xf0ff); |
| 625 | |
| 626 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 627 | |
| 628 | if (retval) |
| 629 | goto out; |
| 630 | |
| 631 | if (wait_for_completion_timeout(&i8042_aux_irq_delivered, |
| 632 | msecs_to_jiffies(250)) == 0) { |
| 633 | /* |
| 634 | * AUX IRQ was never delivered so we need to flush the controller to |
| 635 | * get rid of the byte we put there; otherwise keyboard may not work. |
| 636 | */ |
| 637 | i8042_flush(); |
| 638 | retval = -1; |
| 639 | } |
| 640 | |
| 641 | out: |
| 642 | |
| 643 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | * Disable the interface. |
| 645 | */ |
| 646 | |
| 647 | i8042_ctr |= I8042_CTR_AUXDIS; |
| 648 | i8042_ctr &= ~I8042_CTR_AUXINT; |
| 649 | |
| 650 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 651 | retval = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 653 | if (irq_registered) |
| 654 | free_irq(I8042_AUX_IRQ, i8042_platform_device); |
| 655 | |
| 656 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | } |
| 658 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 659 | static int i8042_controller_check(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 661 | if (i8042_flush() == I8042_BUFFER_SIZE) { |
| 662 | printk(KERN_ERR "i8042.c: No controller found.\n"); |
| 663 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | } |
| 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | return 0; |
| 667 | } |
| 668 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 669 | static int i8042_controller_selftest(void) |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 670 | { |
| 671 | unsigned char param; |
| 672 | |
| 673 | if (!i8042_reset) |
| 674 | return 0; |
| 675 | |
| 676 | if (i8042_command(¶m, I8042_CMD_CTL_TEST)) { |
| 677 | printk(KERN_ERR "i8042.c: i8042 controller self test timeout.\n"); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 678 | return -ENODEV; |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | if (param != I8042_RET_CTL_TEST) { |
| 682 | printk(KERN_ERR "i8042.c: i8042 controller selftest failed. (%#x != %#x)\n", |
| 683 | param, I8042_RET_CTL_TEST); |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 684 | return -EIO; |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | return 0; |
| 688 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
| 690 | /* |
| 691 | * i8042_controller init initializes the i8042 controller, and, |
| 692 | * most importantly, sets it into non-xlated mode if that's |
| 693 | * desired. |
| 694 | */ |
| 695 | |
| 696 | static int i8042_controller_init(void) |
| 697 | { |
| 698 | unsigned long flags; |
| 699 | |
| 700 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | * Save the CTR for restoral on unload / reboot. |
| 702 | */ |
| 703 | |
| 704 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) { |
| 705 | 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] | 706 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
| 708 | |
| 709 | i8042_initial_ctr = i8042_ctr; |
| 710 | |
| 711 | /* |
| 712 | * Disable the keyboard interface and interrupt. |
| 713 | */ |
| 714 | |
| 715 | i8042_ctr |= I8042_CTR_KBDDIS; |
| 716 | i8042_ctr &= ~I8042_CTR_KBDINT; |
| 717 | |
| 718 | /* |
| 719 | * Handle keylock. |
| 720 | */ |
| 721 | |
| 722 | spin_lock_irqsave(&i8042_lock, flags); |
| 723 | if (~i8042_read_status() & I8042_STR_KEYLOCK) { |
| 724 | if (i8042_unlock) |
| 725 | i8042_ctr |= I8042_CTR_IGNKEYLOCK; |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 726 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | printk(KERN_WARNING "i8042.c: Warning: Keylock active.\n"); |
| 728 | } |
| 729 | spin_unlock_irqrestore(&i8042_lock, flags); |
| 730 | |
| 731 | /* |
| 732 | * If the chip is configured into nontranslated mode by the BIOS, don't |
| 733 | * bother enabling translating and be happy. |
| 734 | */ |
| 735 | |
| 736 | if (~i8042_ctr & I8042_CTR_XLATE) |
| 737 | i8042_direct = 1; |
| 738 | |
| 739 | /* |
| 740 | * Set nontranslated mode for the kbd interface if requested by an option. |
| 741 | * After this the kbd interface becomes a simple serial in/out, like the aux |
| 742 | * interface is. We don't do this by default, since it can confuse notebook |
| 743 | * BIOSes. |
| 744 | */ |
| 745 | |
| 746 | if (i8042_direct) |
| 747 | i8042_ctr &= ~I8042_CTR_XLATE; |
| 748 | |
| 749 | /* |
| 750 | * Write CTR back. |
| 751 | */ |
| 752 | |
| 753 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
| 754 | 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] | 755 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | } |
| 757 | |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | |
| 762 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 763 | * 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] | 764 | */ |
| 765 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 766 | static void i8042_controller_reset(void) |
| 767 | { |
| 768 | i8042_flush(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | |
| 770 | /* |
| 771 | * Disable MUX mode if present. |
| 772 | */ |
| 773 | |
| 774 | if (i8042_mux_present) |
| 775 | i8042_set_mux_mode(0, NULL); |
| 776 | |
| 777 | /* |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 778 | * Reset the controller if requested. |
| 779 | */ |
| 780 | |
| 781 | i8042_controller_selftest(); |
| 782 | |
| 783 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | * Restore the original control register setting. |
| 785 | */ |
| 786 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 787 | if (i8042_command(&i8042_initial_ctr, I8042_CMD_CTL_WCTR)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | printk(KERN_WARNING "i8042.c: Can't restore CTR.\n"); |
| 789 | } |
| 790 | |
| 791 | |
| 792 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | * i8042_panic_blink() will flash the keyboard LEDs and is called when |
| 794 | * kernel panics. Flashing LEDs is useful for users running X who may |
| 795 | * not see the console and will help distingushing panics from "real" |
| 796 | * lockups. |
| 797 | * |
| 798 | * Note that DELAY has a limit of 10ms so we will not get stuck here |
| 799 | * waiting for KBC to free up even if KBD interrupt is off |
| 800 | */ |
| 801 | |
| 802 | #define DELAY do { mdelay(1); if (++delay > 10) return delay; } while(0) |
| 803 | |
| 804 | static long i8042_panic_blink(long count) |
| 805 | { |
| 806 | long delay = 0; |
| 807 | static long last_blink; |
| 808 | static char led; |
| 809 | |
| 810 | /* |
| 811 | * We expect frequency to be about 1/2s. KDB uses about 1s. |
| 812 | * Make sure they are different. |
| 813 | */ |
| 814 | if (!i8042_blink_frequency) |
| 815 | return 0; |
| 816 | if (count - last_blink < i8042_blink_frequency) |
| 817 | return 0; |
| 818 | |
| 819 | led ^= 0x01 | 0x04; |
| 820 | while (i8042_read_status() & I8042_STR_IBF) |
| 821 | DELAY; |
Dmitry Torokhov | 19f3c3e | 2007-01-18 00:42:31 -0500 | [diff] [blame] | 822 | dbg("%02x -> i8042 (panic blink)", 0xed); |
| 823 | i8042_suppress_kbd_ack = 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | i8042_write_data(0xed); /* set leds */ |
| 825 | DELAY; |
| 826 | while (i8042_read_status() & I8042_STR_IBF) |
| 827 | DELAY; |
| 828 | DELAY; |
Dmitry Torokhov | 19f3c3e | 2007-01-18 00:42:31 -0500 | [diff] [blame] | 829 | dbg("%02x -> i8042 (panic blink)", led); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | i8042_write_data(led); |
| 831 | DELAY; |
| 832 | last_blink = count; |
| 833 | return delay; |
| 834 | } |
| 835 | |
| 836 | #undef DELAY |
| 837 | |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 838 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | /* |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 840 | * Here we try to restore the original BIOS settings. We only want to |
| 841 | * do that once, when we really suspend, not when we taking memory |
| 842 | * snapshot for swsusp (in this case we'll perform required cleanup |
| 843 | * as part of shutdown process). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | */ |
| 845 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 846 | static int i8042_suspend(struct platform_device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | { |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 848 | if (dev->dev.power.power_state.event != state.event) { |
| 849 | if (state.event == PM_EVENT_SUSPEND) |
| 850 | i8042_controller_reset(); |
| 851 | |
| 852 | dev->dev.power.power_state = state; |
| 853 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
| 855 | return 0; |
| 856 | } |
| 857 | |
| 858 | |
| 859 | /* |
| 860 | * Here we try to reset everything back to a state in which suspended |
| 861 | */ |
| 862 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 863 | static int i8042_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 865 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 867 | /* |
| 868 | * Do not bother with restoring state if we haven't suspened yet |
| 869 | */ |
| 870 | if (dev->dev.power.power_state.event == PM_EVENT_ON) |
| 871 | return 0; |
| 872 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 873 | error = i8042_controller_check(); |
| 874 | if (error) |
| 875 | return error; |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 876 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 877 | error = i8042_controller_selftest(); |
| 878 | if (error) |
| 879 | return error; |
| 880 | |
| 881 | /* |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 882 | * Restore original CTR value and disable all ports |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 883 | */ |
| 884 | |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 885 | i8042_ctr = i8042_initial_ctr; |
| 886 | if (i8042_direct) |
| 887 | i8042_ctr &= ~I8042_CTR_XLATE; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 888 | i8042_ctr |= I8042_CTR_AUXDIS | I8042_CTR_KBDDIS; |
| 889 | i8042_ctr &= ~(I8042_CTR_AUXINT | I8042_CTR_KBDINT); |
Vojtech Pavlik | 2673c836 | 2005-05-28 02:11:27 -0500 | [diff] [blame] | 890 | if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 891 | printk(KERN_ERR "i8042: Can't write CTR to resume\n"); |
| 892 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | } |
| 894 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 895 | if (i8042_mux_present) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | if (i8042_set_mux_mode(1, NULL) || i8042_enable_mux_ports()) |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 897 | printk(KERN_WARNING |
| 898 | "i8042: failed to resume active multiplexor, " |
| 899 | "mouse won't work.\n"); |
| 900 | } else if (i8042_ports[I8042_AUX_PORT_NO].serio) |
| 901 | i8042_enable_aux_port(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 903 | if (i8042_ports[I8042_KBD_PORT_NO].serio) |
| 904 | i8042_enable_kbd_port(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 906 | i8042_interrupt(0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 908 | dev->dev.power.power_state = PMSG_ON; |
| 909 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | } |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 912 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
| 914 | /* |
| 915 | * We need to reset the 8042 back to original mode on system shutdown, |
| 916 | * because otherwise BIOSes will be confused. |
| 917 | */ |
| 918 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 919 | static void i8042_shutdown(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | { |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 921 | i8042_controller_reset(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | } |
| 923 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 924 | static int __devinit i8042_create_kbd_port(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | { |
| 926 | struct serio *serio; |
| 927 | struct i8042_port *port = &i8042_ports[I8042_KBD_PORT_NO]; |
| 928 | |
Dmitry Torokhov | d39969d | 2005-09-10 12:04:42 -0500 | [diff] [blame] | 929 | serio = kzalloc(sizeof(struct serio), GFP_KERNEL); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 930 | if (!serio) |
| 931 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 933 | serio->id.type = i8042_direct ? SERIO_8042 : SERIO_8042_XL; |
| 934 | serio->write = i8042_dumbkbd ? NULL : i8042_kbd_write; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 935 | serio->start = i8042_start; |
| 936 | serio->stop = i8042_stop; |
| 937 | serio->port_data = port; |
| 938 | serio->dev.parent = &i8042_platform_device->dev; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 939 | strlcpy(serio->name, "i8042 KBD port", sizeof(serio->name)); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 940 | strlcpy(serio->phys, I8042_KBD_PHYS_DESC, sizeof(serio->phys)); |
| 941 | |
| 942 | port->serio = serio; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 943 | port->irq = I8042_KBD_IRQ; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 944 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 945 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 946 | } |
| 947 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 948 | static int __devinit i8042_create_aux_port(int idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | { |
| 950 | struct serio *serio; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 951 | int port_no = idx < 0 ? I8042_AUX_PORT_NO : I8042_MUX_PORT_NO + idx; |
| 952 | struct i8042_port *port = &i8042_ports[port_no]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | |
Dmitry Torokhov | d39969d | 2005-09-10 12:04:42 -0500 | [diff] [blame] | 954 | serio = kzalloc(sizeof(struct serio), GFP_KERNEL); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 955 | if (!serio) |
| 956 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 957 | |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 958 | serio->id.type = SERIO_8042; |
| 959 | serio->write = i8042_aux_write; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 960 | serio->start = i8042_start; |
| 961 | serio->stop = i8042_stop; |
| 962 | serio->port_data = port; |
| 963 | serio->dev.parent = &i8042_platform_device->dev; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 964 | if (idx < 0) { |
| 965 | strlcpy(serio->name, "i8042 AUX port", sizeof(serio->name)); |
| 966 | strlcpy(serio->phys, I8042_AUX_PHYS_DESC, sizeof(serio->phys)); |
| 967 | } else { |
| 968 | snprintf(serio->name, sizeof(serio->name), "i8042 AUX%d port", idx); |
| 969 | snprintf(serio->phys, sizeof(serio->phys), I8042_MUX_PHYS_DESC, idx + 1); |
| 970 | } |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 971 | |
| 972 | port->serio = serio; |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 973 | port->mux = idx; |
| 974 | port->irq = I8042_AUX_IRQ; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 975 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 976 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 979 | static void __devinit i8042_free_kbd_port(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 981 | kfree(i8042_ports[I8042_KBD_PORT_NO].serio); |
| 982 | i8042_ports[I8042_KBD_PORT_NO].serio = NULL; |
| 983 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 985 | static void __devinit i8042_free_aux_ports(void) |
| 986 | { |
| 987 | int i; |
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 | for (i = I8042_AUX_PORT_NO; i < I8042_NUM_PORTS; i++) { |
| 990 | kfree(i8042_ports[i].serio); |
| 991 | i8042_ports[i].serio = NULL; |
| 992 | } |
| 993 | } |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 994 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 995 | static void __devinit i8042_register_ports(void) |
| 996 | { |
| 997 | int i; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 998 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 999 | for (i = 0; i < I8042_NUM_PORTS; i++) { |
| 1000 | if (i8042_ports[i].serio) { |
| 1001 | printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n", |
| 1002 | i8042_ports[i].serio->name, |
| 1003 | (unsigned long) I8042_DATA_REG, |
| 1004 | (unsigned long) I8042_COMMAND_REG, |
| 1005 | i8042_ports[i].irq); |
| 1006 | serio_register_port(i8042_ports[i].serio); |
| 1007 | } |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | static void __devinit i8042_unregister_ports(void) |
| 1012 | { |
| 1013 | int i; |
| 1014 | |
| 1015 | for (i = 0; i < I8042_NUM_PORTS; i++) { |
| 1016 | if (i8042_ports[i].serio) { |
| 1017 | serio_unregister_port(i8042_ports[i].serio); |
| 1018 | i8042_ports[i].serio = NULL; |
| 1019 | } |
| 1020 | } |
| 1021 | } |
| 1022 | |
| 1023 | static void i8042_free_irqs(void) |
| 1024 | { |
| 1025 | if (i8042_aux_irq_registered) |
| 1026 | free_irq(I8042_AUX_IRQ, i8042_platform_device); |
| 1027 | if (i8042_kbd_irq_registered) |
| 1028 | free_irq(I8042_KBD_IRQ, i8042_platform_device); |
| 1029 | |
| 1030 | i8042_aux_irq_registered = i8042_kbd_irq_registered = 0; |
| 1031 | } |
| 1032 | |
| 1033 | static int __devinit i8042_setup_aux(void) |
| 1034 | { |
| 1035 | int (*aux_enable)(void); |
| 1036 | int error; |
| 1037 | int i; |
| 1038 | |
| 1039 | if (i8042_check_aux()) |
| 1040 | return -ENODEV; |
| 1041 | |
| 1042 | if (i8042_nomux || i8042_check_mux()) { |
| 1043 | error = i8042_create_aux_port(-1); |
| 1044 | if (error) |
| 1045 | goto err_free_ports; |
| 1046 | aux_enable = i8042_enable_aux_port; |
| 1047 | } else { |
| 1048 | for (i = 0; i < I8042_NUM_MUX_PORTS; i++) { |
| 1049 | error = i8042_create_aux_port(i); |
| 1050 | if (error) |
| 1051 | goto err_free_ports; |
| 1052 | } |
| 1053 | aux_enable = i8042_enable_mux_ports; |
| 1054 | } |
| 1055 | |
| 1056 | error = request_irq(I8042_AUX_IRQ, i8042_interrupt, IRQF_SHARED, |
| 1057 | "i8042", i8042_platform_device); |
| 1058 | if (error) |
| 1059 | goto err_free_ports; |
| 1060 | |
| 1061 | if (aux_enable()) |
| 1062 | goto err_free_irq; |
| 1063 | |
| 1064 | i8042_aux_irq_registered = 1; |
| 1065 | return 0; |
| 1066 | |
| 1067 | err_free_irq: |
| 1068 | free_irq(I8042_AUX_IRQ, i8042_platform_device); |
| 1069 | err_free_ports: |
| 1070 | i8042_free_aux_ports(); |
| 1071 | return error; |
| 1072 | } |
| 1073 | |
| 1074 | static int __devinit i8042_setup_kbd(void) |
| 1075 | { |
| 1076 | int error; |
| 1077 | |
| 1078 | error = i8042_create_kbd_port(); |
| 1079 | if (error) |
| 1080 | return error; |
| 1081 | |
| 1082 | error = request_irq(I8042_KBD_IRQ, i8042_interrupt, IRQF_SHARED, |
| 1083 | "i8042", i8042_platform_device); |
| 1084 | if (error) |
| 1085 | goto err_free_port; |
| 1086 | |
| 1087 | error = i8042_enable_kbd_port(); |
| 1088 | if (error) |
| 1089 | goto err_free_irq; |
| 1090 | |
| 1091 | i8042_kbd_irq_registered = 1; |
| 1092 | return 0; |
| 1093 | |
| 1094 | err_free_irq: |
| 1095 | free_irq(I8042_KBD_IRQ, i8042_platform_device); |
| 1096 | err_free_port: |
| 1097 | i8042_free_kbd_port(); |
| 1098 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | } |
| 1100 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1101 | static int __devinit i8042_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1103 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1105 | error = i8042_controller_selftest(); |
| 1106 | if (error) |
| 1107 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1109 | error = i8042_controller_init(); |
| 1110 | if (error) |
| 1111 | return 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 | if (!i8042_noaux) { |
| 1114 | error = i8042_setup_aux(); |
| 1115 | if (error && error != -ENODEV && error != -EBUSY) |
| 1116 | goto out_fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | } |
| 1118 | |
Dmitry Torokhov | 945ef0d | 2005-09-04 01:42:00 -0500 | [diff] [blame] | 1119 | if (!i8042_nokbd) { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1120 | error = i8042_setup_kbd(); |
| 1121 | if (error) |
| 1122 | goto out_fail; |
Dmitry Torokhov | 945ef0d | 2005-09-04 01:42:00 -0500 | [diff] [blame] | 1123 | } |
| 1124 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1125 | /* |
| 1126 | * Ok, everything is ready, let's register all serio ports |
| 1127 | */ |
| 1128 | i8042_register_ports(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | return 0; |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 1131 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1132 | out_fail: |
| 1133 | i8042_free_aux_ports(); /* in case KBD failed but AUX not */ |
| 1134 | i8042_free_irqs(); |
| 1135 | i8042_controller_reset(); |
Dmitry Torokhov | 0854e52 | 2005-09-04 01:41:27 -0500 | [diff] [blame] | 1136 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1137 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
| 1139 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1140 | static int __devexit i8042_remove(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | { |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1142 | i8042_unregister_ports(); |
| 1143 | i8042_free_irqs(); |
| 1144 | i8042_controller_reset(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1146 | return 0; |
| 1147 | } |
| 1148 | |
| 1149 | static struct platform_driver i8042_driver = { |
| 1150 | .driver = { |
| 1151 | .name = "i8042", |
| 1152 | .owner = THIS_MODULE, |
| 1153 | }, |
| 1154 | .probe = i8042_probe, |
| 1155 | .remove = __devexit_p(i8042_remove), |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 1156 | .shutdown = i8042_shutdown, |
| 1157 | #ifdef CONFIG_PM |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1158 | .suspend = i8042_suspend, |
| 1159 | .resume = i8042_resume, |
Dmitry Torokhov | 82dd9ef | 2007-02-18 01:40:30 -0500 | [diff] [blame] | 1160 | #endif |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1161 | }; |
| 1162 | |
| 1163 | static int __init i8042_init(void) |
| 1164 | { |
| 1165 | int err; |
| 1166 | |
| 1167 | dbg_init(); |
| 1168 | |
| 1169 | err = i8042_platform_init(); |
| 1170 | if (err) |
| 1171 | return err; |
| 1172 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1173 | err = i8042_controller_check(); |
| 1174 | if (err) |
| 1175 | goto err_platform_exit; |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1176 | |
| 1177 | err = platform_driver_register(&i8042_driver); |
| 1178 | if (err) |
| 1179 | goto err_platform_exit; |
| 1180 | |
| 1181 | i8042_platform_device = platform_device_alloc("i8042", -1); |
| 1182 | if (!i8042_platform_device) { |
| 1183 | err = -ENOMEM; |
| 1184 | goto err_unregister_driver; |
| 1185 | } |
| 1186 | |
| 1187 | err = platform_device_add(i8042_platform_device); |
| 1188 | if (err) |
| 1189 | goto err_free_device; |
| 1190 | |
Dmitry Torokhov | de9ce70 | 2006-09-10 21:57:21 -0400 | [diff] [blame] | 1191 | panic_blink = i8042_panic_blink; |
| 1192 | |
Dmitry Torokhov | 87fd631 | 2005-12-28 01:25:11 -0500 | [diff] [blame] | 1193 | return 0; |
| 1194 | |
| 1195 | err_free_device: |
| 1196 | platform_device_put(i8042_platform_device); |
| 1197 | err_unregister_driver: |
| 1198 | platform_driver_unregister(&i8042_driver); |
| 1199 | err_platform_exit: |
| 1200 | i8042_platform_exit(); |
| 1201 | |
| 1202 | return err; |
| 1203 | } |
| 1204 | |
| 1205 | static void __exit i8042_exit(void) |
| 1206 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | platform_device_unregister(i8042_platform_device); |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 1208 | platform_driver_unregister(&i8042_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | i8042_platform_exit(); |
| 1210 | |
| 1211 | panic_blink = NULL; |
| 1212 | } |
| 1213 | |
| 1214 | module_init(i8042_init); |
| 1215 | module_exit(i8042_exit); |