2 * i8042 keyboard and mouse controller driver for Linux
4 * Copyright (c) 1999-2004 Vojtech Pavlik
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.
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>
18 #include <linux/init.h>
19 #include <linux/serio.h>
20 #include <linux/err.h>
21 #include <linux/rcupdate.h>
22 #include <linux/platform_device.h>
26 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
27 MODULE_DESCRIPTION("i8042 keyboard and mouse controller driver");
28 MODULE_LICENSE("GPL");
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.");
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.");
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.");
42 static unsigned int i8042_unlock
;
43 module_param_named(unlock
, i8042_unlock
, bool, 0);
44 MODULE_PARM_DESC(unlock
, "Ignore keyboard lock.");
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.");
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.");
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");
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");
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");
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");
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");
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");
88 static DEFINE_SPINLOCK(i8042_lock
);
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)
102 static struct i8042_port i8042_ports
[I8042_NUM_PORTS
];
104 static unsigned char i8042_initial_ctr
;
105 static unsigned char i8042_ctr
;
106 static unsigned char i8042_mux_present
;
107 static unsigned char i8042_kbd_irq_registered
;
108 static unsigned char i8042_aux_irq_registered
;
109 static unsigned char i8042_suppress_kbd_ack
;
110 static struct platform_device
*i8042_platform_device
;
112 static irqreturn_t
i8042_interrupt(int irq
, void *dev_id
);
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.
120 static int i8042_wait_read(void)
124 while ((~i8042_read_status() & I8042_STR_OBF
) && (i
< I8042_CTL_TIMEOUT
)) {
128 return -(i
== I8042_CTL_TIMEOUT
);
131 static int i8042_wait_write(void)
135 while ((i8042_read_status() & I8042_STR_IBF
) && (i
< I8042_CTL_TIMEOUT
)) {
139 return -(i
== I8042_CTL_TIMEOUT
);
143 * i8042_flush() flushes all data that may be in the keyboard and mouse buffers
144 * of the i8042 down the toilet.
147 static int i8042_flush(void)
150 unsigned char data
, str
;
153 spin_lock_irqsave(&i8042_lock
, flags
);
155 while (((str
= i8042_read_status()) & I8042_STR_OBF
) && (i
< I8042_BUFFER_SIZE
)) {
157 data
= i8042_read_data();
159 dbg("%02x <- i8042 (flush, %s)", data
,
160 str
& I8042_STR_AUXDATA
? "aux" : "kbd");
163 spin_unlock_irqrestore(&i8042_lock
, flags
);
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.
176 static int __i8042_command(unsigned char *param
, int command
)
180 if (i8042_noloop
&& command
== I8042_CMD_AUX_LOOP
)
183 error
= i8042_wait_write();
187 dbg("%02x -> i8042 (command)", command
& 0xff);
188 i8042_write_command(command
& 0xff);
190 for (i
= 0; i
< ((command
>> 12) & 0xf); i
++) {
191 error
= i8042_wait_write();
194 dbg("%02x -> i8042 (parameter)", param
[i
]);
195 i8042_write_data(param
[i
]);
198 for (i
= 0; i
< ((command
>> 8) & 0xf); i
++) {
199 error
= i8042_wait_read();
201 dbg(" -- i8042 (timeout)");
205 if (command
== I8042_CMD_AUX_LOOP
&&
206 !(i8042_read_status() & I8042_STR_AUXDATA
)) {
207 dbg(" -- i8042 (auxerr)");
211 param
[i
] = i8042_read_data();
212 dbg("%02x <- i8042 (return)", param
[i
]);
218 static int i8042_command(unsigned char *param
, int command
)
223 spin_lock_irqsave(&i8042_lock
, flags
);
224 retval
= __i8042_command(param
, command
);
225 spin_unlock_irqrestore(&i8042_lock
, flags
);
231 * i8042_kbd_write() sends a byte out through the keyboard interface.
234 static int i8042_kbd_write(struct serio
*port
, unsigned char c
)
239 spin_lock_irqsave(&i8042_lock
, flags
);
241 if (!(retval
= i8042_wait_write())) {
242 dbg("%02x -> i8042 (kbd-data)", c
);
246 spin_unlock_irqrestore(&i8042_lock
, flags
);
252 * i8042_aux_write() sends a byte out through the aux interface.
255 static int i8042_aux_write(struct serio
*serio
, unsigned char c
)
257 struct i8042_port
*port
= serio
->port_data
;
259 return i8042_command(&c
, port
->mux
== -1 ?
261 I8042_CMD_MUX_SEND
+ port
->mux
);
265 * i8042_start() is called by serio core when port is about to finish
266 * registering. It will mark port as existing so i8042_interrupt can
267 * start sending data through it.
269 static int i8042_start(struct serio
*serio
)
271 struct i8042_port
*port
= serio
->port_data
;
279 * i8042_stop() marks serio port as non-existing so i8042_interrupt
280 * will not try to send data to the port that is about to go away.
281 * The function is called by serio core as part of unregister procedure.
283 static void i8042_stop(struct serio
*serio
)
285 struct i8042_port
*port
= serio
->port_data
;
293 * i8042_interrupt() is the most important function in this driver -
294 * it handles the interrupts from the i8042, and sends incoming bytes
295 * to the upper layers.
298 static irqreturn_t
i8042_interrupt(int irq
, void *dev_id
)
300 struct i8042_port
*port
;
302 unsigned char str
, data
;
304 unsigned int port_no
;
307 spin_lock_irqsave(&i8042_lock
, flags
);
308 str
= i8042_read_status();
309 if (unlikely(~str
& I8042_STR_OBF
)) {
310 spin_unlock_irqrestore(&i8042_lock
, flags
);
311 if (irq
) dbg("Interrupt %d, without any data", irq
);
315 data
= i8042_read_data();
316 spin_unlock_irqrestore(&i8042_lock
, flags
);
318 if (i8042_mux_present
&& (str
& I8042_STR_AUXDATA
)) {
319 static unsigned long last_transmit
;
320 static unsigned char last_str
;
323 if (str
& I8042_STR_MUXERR
) {
324 dbg("MUX error, status is %02x, data is %02x", str
, data
);
328 * When MUXERR condition is signalled the data register can only contain
329 * 0xfd, 0xfe or 0xff if implementation follows the spec. Unfortunately
330 * it is not always the case. Some KBC just get confused which port the
331 * data came from and signal error leaving the data intact. They _do not_
332 * revert to legacy mode (actually I've never seen KBC reverting to legacy
333 * mode yet, when we see one we'll add proper handling).
334 * Anyway, we will assume that the data came from the same serio last byte
335 * was transmitted (if transmission happened not too long ago).
337 if (time_before(jiffies
, last_transmit
+ HZ
/10)) {
341 /* fall through - report timeout */
343 case 0xfe: dfl
= SERIO_TIMEOUT
; data
= 0xfe; break;
344 case 0xff: dfl
= SERIO_PARITY
; data
= 0xfe; break;
348 port_no
= I8042_MUX_PORT_NO
+ ((str
>> 6) & 3);
350 last_transmit
= jiffies
;
353 dfl
= ((str
& I8042_STR_PARITY
) ? SERIO_PARITY
: 0) |
354 ((str
& I8042_STR_TIMEOUT
) ? SERIO_TIMEOUT
: 0);
356 port_no
= (str
& I8042_STR_AUXDATA
) ?
357 I8042_AUX_PORT_NO
: I8042_KBD_PORT_NO
;
360 port
= &i8042_ports
[port_no
];
362 dbg("%02x <- i8042 (interrupt, %d, %d%s%s)",
364 dfl
& SERIO_PARITY
? ", bad parity" : "",
365 dfl
& SERIO_TIMEOUT
? ", timeout" : "");
367 if (unlikely(i8042_suppress_kbd_ack
))
368 if (port_no
== I8042_KBD_PORT_NO
&&
369 (data
== 0xfa || data
== 0xfe)) {
370 i8042_suppress_kbd_ack
= 0;
374 if (likely(port
->exists
))
375 serio_interrupt(port
->serio
, data
, dfl
);
378 return IRQ_RETVAL(ret
);
382 * i8042_enable_kbd_port enables keybaord port on chip
385 static int i8042_enable_kbd_port(void)
387 i8042_ctr
&= ~I8042_CTR_KBDDIS
;
388 i8042_ctr
|= I8042_CTR_KBDINT
;
390 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_WCTR
)) {
391 printk(KERN_ERR
"i8042.c: Failed to enable KBD port.\n");
399 * i8042_enable_aux_port enables AUX (mouse) port on chip
402 static int i8042_enable_aux_port(void)
404 i8042_ctr
&= ~I8042_CTR_AUXDIS
;
405 i8042_ctr
|= I8042_CTR_AUXINT
;
407 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_WCTR
)) {
408 printk(KERN_ERR
"i8042.c: Failed to enable AUX port.\n");
416 * i8042_enable_mux_ports enables 4 individual AUX ports after
417 * the controller has been switched into Multiplexed mode
420 static int i8042_enable_mux_ports(void)
425 for (i
= 0; i
< I8042_NUM_MUX_PORTS
; i
++) {
426 i8042_command(¶m
, I8042_CMD_MUX_PFX
+ i
);
427 i8042_command(¶m
, I8042_CMD_AUX_ENABLE
);
430 return i8042_enable_aux_port();
434 * i8042_set_mux_mode checks whether the controller has an active
435 * multiplexor and puts the chip into Multiplexed (1) or Legacy (0) mode.
438 static int i8042_set_mux_mode(unsigned int mode
, unsigned char *mux_version
)
443 * Get rid of bytes in the queue.
449 * Internal loopback test - send three bytes, they should come back from the
450 * mouse interface, the last should be version.
454 if (i8042_command(¶m
, I8042_CMD_AUX_LOOP
) || param
!= 0xf0)
456 param
= mode
? 0x56 : 0xf6;
457 if (i8042_command(¶m
, I8042_CMD_AUX_LOOP
) || param
!= (mode
? 0x56 : 0xf6))
459 param
= mode
? 0xa4 : 0xa5;
460 if (i8042_command(¶m
, I8042_CMD_AUX_LOOP
) || param
== (mode
? 0xa4 : 0xa5))
464 *mux_version
= param
;
470 * i8042_check_mux() checks whether the controller supports the PS/2 Active
471 * Multiplexing specification by Synaptics, Phoenix, Insyde and
475 static int __devinit
i8042_check_mux(void)
477 unsigned char mux_version
;
479 if (i8042_set_mux_mode(1, &mux_version
))
483 * Workaround for interference with USB Legacy emulation
484 * that causes a v10.12 MUX to be found.
486 if (mux_version
== 0xAC)
489 printk(KERN_INFO
"i8042.c: Detected active multiplexing controller, rev %d.%d.\n",
490 (mux_version
>> 4) & 0xf, mux_version
& 0xf);
493 * Disable all muxed ports by disabling AUX.
495 i8042_ctr
|= I8042_CTR_AUXDIS
;
496 i8042_ctr
&= ~I8042_CTR_AUXINT
;
498 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_WCTR
)) {
499 printk(KERN_ERR
"i8042.c: Failed to disable AUX port, can't use MUX.\n");
503 i8042_mux_present
= 1;
509 * The following is used to test AUX IRQ delivery.
511 static struct completion i8042_aux_irq_delivered __devinitdata
;
512 static int i8042_irq_being_tested __devinitdata
;
514 static irqreturn_t __devinit
i8042_aux_test_irq(int irq
, void *dev_id
)
517 unsigned char str
, data
;
519 spin_lock_irqsave(&i8042_lock
, flags
);
520 str
= i8042_read_status();
521 if (str
& I8042_STR_OBF
) {
522 data
= i8042_read_data();
523 if (i8042_irq_being_tested
&&
524 data
== 0xa5 && (str
& I8042_STR_AUXDATA
))
525 complete(&i8042_aux_irq_delivered
);
527 spin_unlock_irqrestore(&i8042_lock
, flags
);
534 * i8042_check_aux() applies as much paranoia as it can at detecting
535 * the presence of an AUX interface.
538 static int __devinit
i8042_check_aux(void)
541 int irq_registered
= 0;
546 * Get rid of bytes in the queue.
552 * Internal loopback test - filters out AT-type i8042's. Unfortunately
553 * SiS screwed up and their 5597 doesn't support the LOOP command even
554 * though it has an AUX port.
558 if (i8042_command(¶m
, I8042_CMD_AUX_LOOP
) || param
!= 0x5a) {
561 * External connection test - filters out AT-soldered PS/2 i8042's
562 * 0x00 - no error, 0x01-0x03 - clock/data stuck, 0xff - general error
563 * 0xfa - no error on some notebooks which ignore the spec
564 * Because it's common for chipsets to return error on perfectly functioning
565 * AUX ports, we test for this only when the LOOP command failed.
568 if (i8042_command(¶m
, I8042_CMD_AUX_TEST
) ||
569 (param
&& param
!= 0xfa && param
!= 0xff))
574 * Bit assignment test - filters out PS/2 i8042's in AT mode
577 if (i8042_command(¶m
, I8042_CMD_AUX_DISABLE
))
579 if (i8042_command(¶m
, I8042_CMD_CTL_RCTR
) || (~param
& I8042_CTR_AUXDIS
)) {
580 printk(KERN_WARNING
"Failed to disable AUX port, but continuing anyway... Is this a SiS?\n");
581 printk(KERN_WARNING
"If AUX port is really absent please use the 'i8042.noaux' option.\n");
584 if (i8042_command(¶m
, I8042_CMD_AUX_ENABLE
))
586 if (i8042_command(¶m
, I8042_CMD_CTL_RCTR
) || (param
& I8042_CTR_AUXDIS
))
590 * Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and
591 * used it for a PCI card or somethig else.
596 * Without LOOP command we can't test AUX IRQ delivery. Assume the port
597 * is working and hope we are right.
603 if (request_irq(I8042_AUX_IRQ
, i8042_aux_test_irq
, IRQF_SHARED
,
604 "i8042", i8042_platform_device
))
609 if (i8042_enable_aux_port())
612 spin_lock_irqsave(&i8042_lock
, flags
);
614 init_completion(&i8042_aux_irq_delivered
);
615 i8042_irq_being_tested
= 1;
618 retval
= __i8042_command(¶m
, I8042_CMD_AUX_LOOP
& 0xf0ff);
620 spin_unlock_irqrestore(&i8042_lock
, flags
);
625 if (wait_for_completion_timeout(&i8042_aux_irq_delivered
,
626 msecs_to_jiffies(250)) == 0) {
628 * AUX IRQ was never delivered so we need to flush the controller to
629 * get rid of the byte we put there; otherwise keyboard may not work.
638 * Disable the interface.
641 i8042_ctr
|= I8042_CTR_AUXDIS
;
642 i8042_ctr
&= ~I8042_CTR_AUXINT
;
644 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_WCTR
))
648 free_irq(I8042_AUX_IRQ
, i8042_platform_device
);
653 static int i8042_controller_check(void)
655 if (i8042_flush() == I8042_BUFFER_SIZE
) {
656 printk(KERN_ERR
"i8042.c: No controller found.\n");
663 static int i8042_controller_selftest(void)
670 if (i8042_command(¶m
, I8042_CMD_CTL_TEST
)) {
671 printk(KERN_ERR
"i8042.c: i8042 controller self test timeout.\n");
675 if (param
!= I8042_RET_CTL_TEST
) {
676 printk(KERN_ERR
"i8042.c: i8042 controller selftest failed. (%#x != %#x)\n",
677 param
, I8042_RET_CTL_TEST
);
685 * i8042_controller init initializes the i8042 controller, and,
686 * most importantly, sets it into non-xlated mode if that's
690 static int i8042_controller_init(void)
695 * Save the CTR for restoral on unload / reboot.
698 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_RCTR
)) {
699 printk(KERN_ERR
"i8042.c: Can't read CTR while initializing i8042.\n");
703 i8042_initial_ctr
= i8042_ctr
;
706 * Disable the keyboard interface and interrupt.
709 i8042_ctr
|= I8042_CTR_KBDDIS
;
710 i8042_ctr
&= ~I8042_CTR_KBDINT
;
716 spin_lock_irqsave(&i8042_lock
, flags
);
717 if (~i8042_read_status() & I8042_STR_KEYLOCK
) {
719 i8042_ctr
|= I8042_CTR_IGNKEYLOCK
;
721 printk(KERN_WARNING
"i8042.c: Warning: Keylock active.\n");
723 spin_unlock_irqrestore(&i8042_lock
, flags
);
726 * If the chip is configured into nontranslated mode by the BIOS, don't
727 * bother enabling translating and be happy.
730 if (~i8042_ctr
& I8042_CTR_XLATE
)
734 * Set nontranslated mode for the kbd interface if requested by an option.
735 * After this the kbd interface becomes a simple serial in/out, like the aux
736 * interface is. We don't do this by default, since it can confuse notebook
741 i8042_ctr
&= ~I8042_CTR_XLATE
;
747 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_WCTR
)) {
748 printk(KERN_ERR
"i8042.c: Can't write CTR while initializing i8042.\n");
757 * Reset the controller and reset CRT to the original value set by BIOS.
760 static void i8042_controller_reset(void)
765 * Disable MUX mode if present.
768 if (i8042_mux_present
)
769 i8042_set_mux_mode(0, NULL
);
772 * Reset the controller if requested.
775 i8042_controller_selftest();
778 * Restore the original control register setting.
781 if (i8042_command(&i8042_initial_ctr
, I8042_CMD_CTL_WCTR
))
782 printk(KERN_WARNING
"i8042.c: Can't restore CTR.\n");
787 * Here we try to reset everything back to a state in which the BIOS will be
788 * able to talk to the hardware when rebooting.
791 static void i8042_controller_cleanup(void)
796 * Reset anything that is connected to the ports.
799 for (i
= 0; i
< I8042_NUM_PORTS
; i
++)
800 if (i8042_ports
[i
].serio
)
801 serio_cleanup(i8042_ports
[i
].serio
);
803 i8042_controller_reset();
808 * i8042_panic_blink() will flash the keyboard LEDs and is called when
809 * kernel panics. Flashing LEDs is useful for users running X who may
810 * not see the console and will help distingushing panics from "real"
813 * Note that DELAY has a limit of 10ms so we will not get stuck here
814 * waiting for KBC to free up even if KBD interrupt is off
817 #define DELAY do { mdelay(1); if (++delay > 10) return delay; } while(0)
819 static long i8042_panic_blink(long count
)
822 static long last_blink
;
826 * We expect frequency to be about 1/2s. KDB uses about 1s.
827 * Make sure they are different.
829 if (!i8042_blink_frequency
)
831 if (count
- last_blink
< i8042_blink_frequency
)
835 while (i8042_read_status() & I8042_STR_IBF
)
837 i8042_suppress_kbd_ack
= 1;
838 i8042_write_data(0xed); /* set leds */
840 while (i8042_read_status() & I8042_STR_IBF
)
843 i8042_suppress_kbd_ack
= 1;
844 i8042_write_data(led
);
853 * Here we try to restore the original BIOS settings
856 static int i8042_suspend(struct platform_device
*dev
, pm_message_t state
)
858 i8042_controller_cleanup();
865 * Here we try to reset everything back to a state in which suspended
868 static int i8042_resume(struct platform_device
*dev
)
872 error
= i8042_controller_check();
876 error
= i8042_controller_selftest();
881 * Restore pre-resume CTR value and disable all ports
884 i8042_ctr
|= I8042_CTR_AUXDIS
| I8042_CTR_KBDDIS
;
885 i8042_ctr
&= ~(I8042_CTR_AUXINT
| I8042_CTR_KBDINT
);
886 if (i8042_command(&i8042_ctr
, I8042_CMD_CTL_WCTR
)) {
887 printk(KERN_ERR
"i8042: Can't write CTR to resume\n");
891 if (i8042_mux_present
) {
892 if (i8042_set_mux_mode(1, NULL
) || i8042_enable_mux_ports())
894 "i8042: failed to resume active multiplexor, "
895 "mouse won't work.\n");
896 } else if (i8042_ports
[I8042_AUX_PORT_NO
].serio
)
897 i8042_enable_aux_port();
899 if (i8042_ports
[I8042_KBD_PORT_NO
].serio
)
900 i8042_enable_kbd_port();
902 i8042_interrupt(0, NULL
);
908 * We need to reset the 8042 back to original mode on system shutdown,
909 * because otherwise BIOSes will be confused.
912 static void i8042_shutdown(struct platform_device
*dev
)
914 i8042_controller_cleanup();
917 static int __devinit
i8042_create_kbd_port(void)
920 struct i8042_port
*port
= &i8042_ports
[I8042_KBD_PORT_NO
];
922 serio
= kzalloc(sizeof(struct serio
), GFP_KERNEL
);
926 serio
->id
.type
= i8042_direct
? SERIO_8042
: SERIO_8042_XL
;
927 serio
->write
= i8042_dumbkbd
? NULL
: i8042_kbd_write
;
928 serio
->start
= i8042_start
;
929 serio
->stop
= i8042_stop
;
930 serio
->port_data
= port
;
931 serio
->dev
.parent
= &i8042_platform_device
->dev
;
932 strlcpy(serio
->name
, "i8042 KBD port", sizeof(serio
->name
));
933 strlcpy(serio
->phys
, I8042_KBD_PHYS_DESC
, sizeof(serio
->phys
));
936 port
->irq
= I8042_KBD_IRQ
;
941 static int __devinit
i8042_create_aux_port(int idx
)
944 int port_no
= idx
< 0 ? I8042_AUX_PORT_NO
: I8042_MUX_PORT_NO
+ idx
;
945 struct i8042_port
*port
= &i8042_ports
[port_no
];
947 serio
= kzalloc(sizeof(struct serio
), GFP_KERNEL
);
951 serio
->id
.type
= SERIO_8042
;
952 serio
->write
= i8042_aux_write
;
953 serio
->start
= i8042_start
;
954 serio
->stop
= i8042_stop
;
955 serio
->port_data
= port
;
956 serio
->dev
.parent
= &i8042_platform_device
->dev
;
958 strlcpy(serio
->name
, "i8042 AUX port", sizeof(serio
->name
));
959 strlcpy(serio
->phys
, I8042_AUX_PHYS_DESC
, sizeof(serio
->phys
));
961 snprintf(serio
->name
, sizeof(serio
->name
), "i8042 AUX%d port", idx
);
962 snprintf(serio
->phys
, sizeof(serio
->phys
), I8042_MUX_PHYS_DESC
, idx
+ 1);
967 port
->irq
= I8042_AUX_IRQ
;
972 static void __devinit
i8042_free_kbd_port(void)
974 kfree(i8042_ports
[I8042_KBD_PORT_NO
].serio
);
975 i8042_ports
[I8042_KBD_PORT_NO
].serio
= NULL
;
978 static void __devinit
i8042_free_aux_ports(void)
982 for (i
= I8042_AUX_PORT_NO
; i
< I8042_NUM_PORTS
; i
++) {
983 kfree(i8042_ports
[i
].serio
);
984 i8042_ports
[i
].serio
= NULL
;
988 static void __devinit
i8042_register_ports(void)
992 for (i
= 0; i
< I8042_NUM_PORTS
; i
++) {
993 if (i8042_ports
[i
].serio
) {
994 printk(KERN_INFO
"serio: %s at %#lx,%#lx irq %d\n",
995 i8042_ports
[i
].serio
->name
,
996 (unsigned long) I8042_DATA_REG
,
997 (unsigned long) I8042_COMMAND_REG
,
999 serio_register_port(i8042_ports
[i
].serio
);
1004 static void __devinit
i8042_unregister_ports(void)
1008 for (i
= 0; i
< I8042_NUM_PORTS
; i
++) {
1009 if (i8042_ports
[i
].serio
) {
1010 serio_unregister_port(i8042_ports
[i
].serio
);
1011 i8042_ports
[i
].serio
= NULL
;
1016 static void i8042_free_irqs(void)
1018 if (i8042_aux_irq_registered
)
1019 free_irq(I8042_AUX_IRQ
, i8042_platform_device
);
1020 if (i8042_kbd_irq_registered
)
1021 free_irq(I8042_KBD_IRQ
, i8042_platform_device
);
1023 i8042_aux_irq_registered
= i8042_kbd_irq_registered
= 0;
1026 static int __devinit
i8042_setup_aux(void)
1028 int (*aux_enable
)(void);
1032 if (i8042_check_aux())
1035 if (i8042_nomux
|| i8042_check_mux()) {
1036 error
= i8042_create_aux_port(-1);
1038 goto err_free_ports
;
1039 aux_enable
= i8042_enable_aux_port
;
1041 for (i
= 0; i
< I8042_NUM_MUX_PORTS
; i
++) {
1042 error
= i8042_create_aux_port(i
);
1044 goto err_free_ports
;
1046 aux_enable
= i8042_enable_mux_ports
;
1049 error
= request_irq(I8042_AUX_IRQ
, i8042_interrupt
, IRQF_SHARED
,
1050 "i8042", i8042_platform_device
);
1052 goto err_free_ports
;
1057 i8042_aux_irq_registered
= 1;
1061 free_irq(I8042_AUX_IRQ
, i8042_platform_device
);
1063 i8042_free_aux_ports();
1067 static int __devinit
i8042_setup_kbd(void)
1071 error
= i8042_create_kbd_port();
1075 error
= request_irq(I8042_KBD_IRQ
, i8042_interrupt
, IRQF_SHARED
,
1076 "i8042", i8042_platform_device
);
1080 error
= i8042_enable_kbd_port();
1084 i8042_kbd_irq_registered
= 1;
1088 free_irq(I8042_KBD_IRQ
, i8042_platform_device
);
1090 i8042_free_kbd_port();
1094 static int __devinit
i8042_probe(struct platform_device
*dev
)
1098 error
= i8042_controller_selftest();
1102 error
= i8042_controller_init();
1107 error
= i8042_setup_aux();
1108 if (error
&& error
!= -ENODEV
&& error
!= -EBUSY
)
1113 error
= i8042_setup_kbd();
1119 * Ok, everything is ready, let's register all serio ports
1121 i8042_register_ports();
1126 i8042_free_aux_ports(); /* in case KBD failed but AUX not */
1128 i8042_controller_reset();
1133 static int __devexit
i8042_remove(struct platform_device
*dev
)
1135 i8042_unregister_ports();
1137 i8042_controller_reset();
1142 static struct platform_driver i8042_driver
= {
1145 .owner
= THIS_MODULE
,
1147 .probe
= i8042_probe
,
1148 .remove
= __devexit_p(i8042_remove
),
1149 .suspend
= i8042_suspend
,
1150 .resume
= i8042_resume
,
1151 .shutdown
= i8042_shutdown
,
1154 static int __init
i8042_init(void)
1160 err
= i8042_platform_init();
1164 err
= i8042_controller_check();
1166 goto err_platform_exit
;
1168 err
= platform_driver_register(&i8042_driver
);
1170 goto err_platform_exit
;
1172 i8042_platform_device
= platform_device_alloc("i8042", -1);
1173 if (!i8042_platform_device
) {
1175 goto err_unregister_driver
;
1178 err
= platform_device_add(i8042_platform_device
);
1180 goto err_free_device
;
1182 panic_blink
= i8042_panic_blink
;
1187 platform_device_put(i8042_platform_device
);
1188 err_unregister_driver
:
1189 platform_driver_unregister(&i8042_driver
);
1191 i8042_platform_exit();
1196 static void __exit
i8042_exit(void)
1198 platform_device_unregister(i8042_platform_device
);
1199 platform_driver_unregister(&i8042_driver
);
1200 i8042_platform_exit();
1205 module_init(i8042_init
);
1206 module_exit(i8042_exit
);