2 * LIRC driver for ITE IT8712/IT8705 CIR port
4 * Copyright (C) 2001 Hans-Gunter Lutke Uphues <hg_lu@web.de>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 * ITE IT8705 and IT8712(not tested) and IT8720 CIR-port support for lirc based
22 * via cut and paste from lirc_sir.c (C) 2000 Milan Pikula
24 * Attention: Sendmode only tested with debugging logs
26 * 2001/02/27 Christoph Bartelmus <lirc@bartelmus.de> :
27 * reimplemented read function
28 * 2005/06/05 Andrew Calkin implemented support for Asus Digimatrix,
29 * based on work of the following member of the Outertrack Digimatrix
30 * Forum: Art103 <r_tay@hotmail.com>
31 * 2009/12/24 James Edwards <jimbo-lirc@edwardsclan.net> implemeted support
32 * for ITE8704/ITE8718, on my machine, the DSDT reports 8704, but the
33 * chip identifies as 18.
36 #include <linux/module.h>
37 #include <linux/sched.h>
38 #include <linux/errno.h>
39 #include <linux/signal.h>
41 #include <linux/interrupt.h>
42 #include <linux/ioport.h>
43 #include <linux/kernel.h>
44 #include <linux/time.h>
45 #include <linux/string.h>
46 #include <linux/types.h>
47 #include <linux/wait.h>
49 #include <linux/delay.h>
50 #include <linux/poll.h>
51 #include <asm/system.h>
53 #include <linux/irq.h>
54 #include <linux/fcntl.h>
56 #include <linux/timer.h>
57 #include <linux/pnp.h>
59 #include <media/lirc.h>
60 #include <media/lirc_dev.h>
62 #include "lirc_it87.h"
64 #ifdef LIRC_IT87_DIGIMATRIX
65 static int digimatrix
= 1;
66 static int it87_freq
= 36; /* kHz */
69 static int digimatrix
;
70 static int it87_freq
= 38; /* kHz */
71 static int irq
= IT87_CIR_DEFAULT_IRQ
;
74 static unsigned long it87_bits_in_byte_out
;
75 static unsigned long it87_send_counter
;
76 static unsigned char it87_RXEN_mask
= IT87_CIR_RCR_RXEN
;
80 #define LIRC_DRIVER_NAME "lirc_it87"
82 /* timeout for sequences in jiffies (=5/100s) */
83 /* must be longer than TIME_CONST */
84 #define IT87_TIMEOUT (HZ*5/100)
86 /* module parameters */
88 #define dprintk(fmt, args...) \
91 printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \
95 static int io
= IT87_CIR_DEFAULT_IOBASE
;
96 /* receiver demodulator default: off */
97 static int it87_enable_demodulator
;
99 static int timer_enabled
;
100 static DEFINE_SPINLOCK(timer_lock
);
101 static struct timer_list timerlist
;
102 /* time of last signal change detected */
103 static struct timeval last_tv
= {0, 0};
104 /* time of last UART data ready interrupt */
105 static struct timeval last_intr_tv
= {0, 0};
106 static int last_value
;
108 static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue
);
110 static DEFINE_SPINLOCK(hardware_lock
);
111 static DEFINE_SPINLOCK(dev_lock
);
112 static bool device_open
;
114 static int rx_buf
[RBUF_LEN
];
115 unsigned int rx_tail
, rx_head
;
117 static struct pnp_driver it87_pnp_driver
;
119 /* SECTION: Prototypes */
121 /* Communication with user-space */
122 static int lirc_open(struct inode
*inode
, struct file
*file
);
123 static int lirc_close(struct inode
*inode
, struct file
*file
);
124 static unsigned int lirc_poll(struct file
*file
, poll_table
*wait
);
125 static ssize_t
lirc_read(struct file
*file
, char *buf
,
126 size_t count
, loff_t
*ppos
);
127 static ssize_t
lirc_write(struct file
*file
, const char *buf
,
128 size_t n
, loff_t
*pos
);
129 static long lirc_ioctl(struct file
*filep
, unsigned int cmd
, unsigned long arg
);
130 static void add_read_queue(int flag
, unsigned long val
);
131 static int init_chrdev(void);
132 static void drop_chrdev(void);
134 static irqreturn_t
it87_interrupt(int irq
, void *dev_id
);
135 static void send_space(unsigned long len
);
136 static void send_pulse(unsigned long len
);
137 static void init_send(void);
138 static void terminate_send(unsigned long len
);
139 static int init_hardware(void);
140 static void drop_hardware(void);
142 static int init_port(void);
143 static void drop_port(void);
146 /* SECTION: Communication with user-space */
148 static int lirc_open(struct inode
*inode
, struct file
*file
)
150 spin_lock(&dev_lock
);
152 spin_unlock(&dev_lock
);
156 spin_unlock(&dev_lock
);
161 static int lirc_close(struct inode
*inode
, struct file
*file
)
163 spin_lock(&dev_lock
);
165 spin_unlock(&dev_lock
);
170 static unsigned int lirc_poll(struct file
*file
, poll_table
*wait
)
172 poll_wait(file
, &lirc_read_queue
, wait
);
173 if (rx_head
!= rx_tail
)
174 return POLLIN
| POLLRDNORM
;
179 static ssize_t
lirc_read(struct file
*file
, char *buf
,
180 size_t count
, loff_t
*ppos
)
186 if (file
->f_flags
& O_NONBLOCK
&& rx_head
== rx_tail
) {
190 retval
= wait_event_interruptible(lirc_read_queue
,
195 if (copy_to_user((void *) buf
+ n
, (void *) (rx_buf
+ rx_head
),
200 rx_head
= (rx_head
+ 1) & (RBUF_LEN
- 1);
209 static ssize_t
lirc_write(struct file
*file
, const char *buf
,
210 size_t n
, loff_t
*pos
)
217 tx_buf
= memdup_user(buf
, n
);
219 return PTR_ERR(tx_buf
);
226 send_pulse(tx_buf
[i
]);
231 send_space(tx_buf
[i
]);
234 terminate_send(tx_buf
[i
- 1]);
239 static long lirc_ioctl(struct file
*filep
, unsigned int cmd
, unsigned long arg
)
242 unsigned long value
= 0;
244 unsigned long hw_flags
;
246 if (cmd
== LIRC_GET_FEATURES
)
247 value
= LIRC_CAN_SEND_PULSE
|
248 LIRC_CAN_SET_SEND_CARRIER
|
250 else if (cmd
== LIRC_GET_SEND_MODE
)
251 value
= LIRC_MODE_PULSE
;
252 else if (cmd
== LIRC_GET_REC_MODE
)
253 value
= LIRC_MODE_MODE2
;
256 case LIRC_GET_FEATURES
:
257 case LIRC_GET_SEND_MODE
:
258 case LIRC_GET_REC_MODE
:
259 retval
= put_user(value
, (unsigned long *) arg
);
262 case LIRC_SET_SEND_MODE
:
263 case LIRC_SET_REC_MODE
:
264 retval
= get_user(value
, (unsigned long *) arg
);
267 case LIRC_SET_SEND_CARRIER
:
268 retval
= get_user(ivalue
, (unsigned int *) arg
);
272 if (ivalue
> IT87_CIR_FREQ_MAX
||
273 ivalue
< IT87_CIR_FREQ_MIN
)
278 spin_lock_irqsave(&hardware_lock
, hw_flags
);
279 outb(((inb(io
+ IT87_CIR_TCR2
) & IT87_CIR_TCR2_TXMPW
) |
280 (it87_freq
- IT87_CIR_FREQ_MIN
) << 3),
282 spin_unlock_irqrestore(&hardware_lock
, hw_flags
);
283 dprintk("demodulation frequency: %d kHz\n", it87_freq
);
294 if (cmd
== LIRC_SET_REC_MODE
) {
295 if (value
!= LIRC_MODE_MODE2
)
297 } else if (cmd
== LIRC_SET_SEND_MODE
) {
298 if (value
!= LIRC_MODE_PULSE
)
304 static void add_read_queue(int flag
, unsigned long val
)
306 unsigned int new_rx_tail
;
309 dprintk("add flag %d with val %lu\n", flag
, val
);
311 newval
= val
& PULSE_MASK
;
314 * statistically, pulses are ~TIME_CONST/2 too long. we could
315 * maybe make this more exact, but this is good enough
319 if (newval
> TIME_CONST
/ 2)
320 newval
-= TIME_CONST
/ 2;
321 else /* should not ever happen */
325 newval
+= TIME_CONST
/ 2;
326 new_rx_tail
= (rx_tail
+ 1) & (RBUF_LEN
- 1);
327 if (new_rx_tail
== rx_head
) {
328 dprintk("Buffer overrun.\n");
331 rx_buf
[rx_tail
] = newval
;
332 rx_tail
= new_rx_tail
;
333 wake_up_interruptible(&lirc_read_queue
);
337 static const struct file_operations lirc_fops
= {
338 .owner
= THIS_MODULE
,
342 .unlocked_ioctl
= lirc_ioctl
,
344 .release
= lirc_close
,
345 .llseek
= noop_llseek
,
348 static int set_use_inc(void *data
)
353 static void set_use_dec(void *data
)
357 static struct lirc_driver driver
= {
358 .name
= LIRC_DRIVER_NAME
,
364 .set_use_inc
= set_use_inc
,
365 .set_use_dec
= set_use_dec
,
368 .owner
= THIS_MODULE
,
372 static int init_chrdev(void)
374 driver
.minor
= lirc_register_driver(&driver
);
376 if (driver
.minor
< 0) {
377 printk(KERN_ERR LIRC_DRIVER_NAME
": init_chrdev() failed.\n");
384 static void drop_chrdev(void)
386 lirc_unregister_driver(driver
.minor
);
390 /* SECTION: Hardware */
391 static long delta(struct timeval
*tv1
, struct timeval
*tv2
)
395 deltv
= tv2
->tv_sec
- tv1
->tv_sec
;
399 deltv
= deltv
*1000000 + tv2
->tv_usec
- tv1
->tv_usec
;
403 static void it87_timeout(unsigned long data
)
407 /* avoid interference with interrupt */
408 spin_lock_irqsave(&timer_lock
, flags
);
411 /* We have timed out. Disable the RX mechanism. */
413 outb((inb(io
+ IT87_CIR_RCR
) & ~IT87_CIR_RCR_RXEN
) |
414 IT87_CIR_RCR_RXACT
, io
+ IT87_CIR_RCR
);
416 outb(inb(io
+ IT87_CIR_RCR
) | IT87_CIR_RCR_RXEN
,
418 dprintk(" TIMEOUT\n");
422 outb(inb(io
+ IT87_CIR_TCR1
) | IT87_CIR_TCR1_FIFOCLR
,
427 * if last received signal was a pulse, but receiving stopped
428 * within the 9 bit frame, we need to finish this pulse and
429 * simulate a signal change to from pulse to space. Otherwise
430 * upper layers will receive two sequences next time.
434 unsigned long pulse_end
;
436 /* determine 'virtual' pulse end: */
437 pulse_end
= delta(&last_tv
, &last_intr_tv
);
438 dprintk("timeout add %d for %lu usec\n",
439 last_value
, pulse_end
);
440 add_read_queue(last_value
, pulse_end
);
442 last_tv
= last_intr_tv
;
445 spin_unlock_irqrestore(&timer_lock
, flags
);
448 static irqreturn_t
it87_interrupt(int irq
, void *dev_id
)
451 struct timeval curr_tv
;
452 static unsigned long deltv
;
453 unsigned long deltintrtv
;
454 unsigned long flags
, hw_flags
;
460 /* Bit duration in microseconds */
461 const unsigned long bit_duration
= 1000000ul /
462 (115200 / IT87_CIR_BAUDRATE_DIVISOR
);
465 iir
= inb(io
+ IT87_CIR_IIR
);
467 switch (iir
& IT87_CIR_IIR_IID
) {
470 lsr
= inb(io
+ IT87_CIR_RSR
) & (IT87_CIR_RSR_RXFTO
|
472 fifo
= lsr
& IT87_CIR_RSR_RXFBC
;
473 dprintk("iir: 0x%x fifo: 0x%x\n", iir
, lsr
);
475 /* avoid interference with timer */
476 spin_lock_irqsave(&timer_lock
, flags
);
477 spin_lock_irqsave(&hardware_lock
, hw_flags
);
479 static unsigned long acc_pulse
;
480 static unsigned long acc_space
;
483 data
= inb(io
+ IT87_CIR_DR
);
488 del_timer(&timerlist
);
490 * start timer for end of
493 timerlist
.expires
= jiffies
+
495 add_timer(&timerlist
);
499 for (bit
= 0; bit
< 8; ++bit
) {
500 if ((data
>> bit
) & 1) {
517 lastbit
= (data
>> bit
) & 1;
521 } else { /* Normal Operation */
523 del_timer(&timerlist
);
524 data
= inb(io
+ IT87_CIR_DR
);
526 dprintk("data=%02x\n", data
);
527 do_gettimeofday(&curr_tv
);
528 deltv
= delta(&last_tv
, &curr_tv
);
529 deltintrtv
= delta(&last_intr_tv
, &curr_tv
);
531 dprintk("t %lu , d %d\n",
532 deltintrtv
, (int)data
);
535 * if nothing came in last 2 cycles,
538 if (deltintrtv
> TIME_CONST
* 2) {
542 /* simulate signal change */
543 add_read_queue(last_value
,
550 last_intr_tv
.tv_usec
;
555 if (data
^ last_value
) {
557 * deltintrtv > 2*TIME_CONST,
558 * remember ? the other case is
561 add_read_queue(last_value
,
565 if (last_tv
.tv_usec
>= TIME_CONST
)
566 last_tv
.tv_usec
-= TIME_CONST
;
569 last_tv
.tv_usec
+= 1000000 -
573 last_intr_tv
= curr_tv
;
576 * start timer for end of
580 jiffies
+ IT87_TIMEOUT
;
581 add_timer(&timerlist
);
583 outb((inb(io
+ IT87_CIR_RCR
) &
584 ~IT87_CIR_RCR_RXEN
) |
588 outb(inb(io
+ IT87_CIR_RCR
) |
594 spin_unlock_irqrestore(&hardware_lock
, hw_flags
);
595 spin_unlock_irqrestore(&timer_lock
, flags
);
597 return IRQ_RETVAL(IRQ_HANDLED
);
601 dprintk("unknown IRQ (shouldn't happen) !!\n");
602 return IRQ_RETVAL(IRQ_NONE
);
607 static void send_it87(unsigned long len
, unsigned long stime
,
608 unsigned char send_byte
, unsigned int count_bits
)
610 long count
= len
/ stime
;
612 static unsigned char byte_out
;
613 unsigned long hw_flags
;
615 dprintk("%s: len=%ld, sb=%d\n", __func__
, len
, send_byte
);
617 time_left
= (long)len
- (long)count
* (long)stime
;
618 count
+= ((2 * time_left
) / stime
);
621 for (i
= 0; i
< count_bits
; i
++) {
622 byte_out
= (byte_out
<< 1) | (send_byte
& 1);
623 it87_bits_in_byte_out
++;
625 if (it87_bits_in_byte_out
== 8) {
626 dprintk("out=0x%x, tsr_txfbc: 0x%x\n",
628 inb(io
+ IT87_CIR_TSR
) &
631 while ((inb(io
+ IT87_CIR_TSR
) &
632 IT87_CIR_TSR_TXFBC
) >= IT87_CIR_FIFO_SIZE
)
635 spin_lock_irqsave(&hardware_lock
, hw_flags
);
636 outb(byte_out
, io
+ IT87_CIR_DR
);
637 spin_unlock_irqrestore(&hardware_lock
, hw_flags
);
639 it87_bits_in_byte_out
= 0;
648 /*TODO: maybe exchange space and pulse because it8705 only modulates 0-bits */
650 static void send_space(unsigned long len
)
652 send_it87(len
, TIME_CONST
, IT87_CIR_SPACE
, IT87_CIR_BAUDRATE_DIVISOR
);
655 static void send_pulse(unsigned long len
)
657 send_it87(len
, TIME_CONST
, IT87_CIR_PULSE
, IT87_CIR_BAUDRATE_DIVISOR
);
661 static void init_send()
665 spin_lock_irqsave(&hardware_lock
, flags
);
666 /* RXEN=0: receiver disable */
668 outb(inb(io
+ IT87_CIR_RCR
) & ~IT87_CIR_RCR_RXEN
,
670 spin_unlock_irqrestore(&hardware_lock
, flags
);
671 it87_bits_in_byte_out
= 0;
672 it87_send_counter
= 0;
676 static void terminate_send(unsigned long len
)
679 unsigned long last
= 0;
681 last
= it87_send_counter
;
682 /* make sure all necessary data has been sent */
683 while (last
== it87_send_counter
)
685 /* wait until all data sent */
686 while ((inb(io
+ IT87_CIR_TSR
) & IT87_CIR_TSR_TXFBC
) != 0)
688 /* then re-enable receiver */
689 spin_lock_irqsave(&hardware_lock
, flags
);
690 it87_RXEN_mask
= IT87_CIR_RCR_RXEN
;
691 outb(inb(io
+ IT87_CIR_RCR
) | IT87_CIR_RCR_RXEN
,
693 spin_unlock_irqrestore(&hardware_lock
, flags
);
697 static int init_hardware(void)
700 unsigned char it87_rcr
= 0;
702 spin_lock_irqsave(&hardware_lock
, flags
);
704 /* enable r/w-access to Baudrate-Register */
705 outb(IT87_CIR_IER_BR
, io
+ IT87_CIR_IER
);
706 outb(IT87_CIR_BAUDRATE_DIVISOR
% 0x100, io
+IT87_CIR_BDLR
);
707 outb(IT87_CIR_BAUDRATE_DIVISOR
/ 0x100, io
+IT87_CIR_BDHR
);
708 /* Baudrate Register off, define IRQs: Input only */
710 outb(IT87_CIR_IER_IEC
| IT87_CIR_IER_RFOIE
, io
+ IT87_CIR_IER
);
711 /* RX: HCFS=0, RXDCR = 001b (33,75..38,25 kHz), RXEN=1 */
713 outb(IT87_CIR_IER_IEC
| IT87_CIR_IER_RDAIE
, io
+ IT87_CIR_IER
);
714 /* RX: HCFS=0, RXDCR = 001b (35,6..40,3 kHz), RXEN=1 */
716 it87_rcr
= (IT87_CIR_RCR_RXEN
& it87_RXEN_mask
) | 0x1;
717 if (it87_enable_demodulator
)
718 it87_rcr
|= IT87_CIR_RCR_RXEND
;
719 outb(it87_rcr
, io
+ IT87_CIR_RCR
);
721 /* Set FIFO depth to 1 byte, and disable TX */
722 outb(inb(io
+ IT87_CIR_TCR1
) | 0x00,
726 * TX: it87_freq (36kHz), 'reserved' sensitivity
729 outb(((it87_freq
- IT87_CIR_FREQ_MIN
) << 3) | 0x00,
732 /* TX: 38kHz, 13,3us (pulse-width) */
733 outb(((it87_freq
- IT87_CIR_FREQ_MIN
) << 3) | 0x06,
736 spin_unlock_irqrestore(&hardware_lock
, flags
);
741 static void drop_hardware(void)
745 spin_lock_irqsave(&hardware_lock
, flags
);
747 /* receiver disable */
749 outb(0x1, io
+ IT87_CIR_RCR
);
751 outb(0, io
+ IT87_CIR_IER
);
753 outb(IT87_CIR_TCR1_FIFOCLR
, io
+IT87_CIR_TCR1
);
755 outb(IT87_CIR_IER_RESET
, io
+IT87_CIR_IER
);
757 spin_unlock_irqrestore(&hardware_lock
, flags
);
761 static unsigned char it87_read(unsigned char port
)
763 outb(port
, IT87_ADRPORT
);
764 return inb(IT87_DATAPORT
);
768 static void it87_write(unsigned char port
, unsigned char data
)
770 outb(port
, IT87_ADRPORT
);
771 outb(data
, IT87_DATAPORT
);
775 /* SECTION: Initialisation */
777 static int init_port(void)
779 unsigned long hw_flags
;
782 unsigned char init_bytes
[4] = IT87_INIT
;
783 unsigned char it87_chipid
= 0;
784 unsigned char ldn
= 0;
785 unsigned int it87_io
= 0;
786 unsigned int it87_irq
= 0;
788 /* Enter MB PnP Mode */
789 outb(init_bytes
[0], IT87_ADRPORT
);
790 outb(init_bytes
[1], IT87_ADRPORT
);
791 outb(init_bytes
[2], IT87_ADRPORT
);
792 outb(init_bytes
[3], IT87_ADRPORT
);
795 it87_chipid
= it87_read(IT87_CHIP_ID1
);
796 if (it87_chipid
!= 0x87) {
800 it87_chipid
= it87_read(IT87_CHIP_ID2
);
801 if ((it87_chipid
!= 0x05) &&
802 (it87_chipid
!= 0x12) &&
803 (it87_chipid
!= 0x18) &&
804 (it87_chipid
!= 0x20)) {
805 printk(KERN_INFO LIRC_DRIVER_NAME
806 ": no IT8704/05/12/18/20 found (claimed IT87%02x), "
807 "exiting..\n", it87_chipid
);
811 printk(KERN_INFO LIRC_DRIVER_NAME
812 ": found IT87%02x.\n",
815 /* get I/O-Port and IRQ */
816 if (it87_chipid
== 0x12 || it87_chipid
== 0x18)
817 ldn
= IT8712_CIR_LDN
;
819 ldn
= IT8705_CIR_LDN
;
820 it87_write(IT87_LDN
, ldn
);
822 it87_io
= it87_read(IT87_CIR_BASE_MSB
) * 256 +
823 it87_read(IT87_CIR_BASE_LSB
);
826 io
= IT87_CIR_DEFAULT_IOBASE
;
827 printk(KERN_INFO LIRC_DRIVER_NAME
828 ": set default io 0x%x\n",
830 it87_write(IT87_CIR_BASE_MSB
, io
/ 0x100);
831 it87_write(IT87_CIR_BASE_LSB
, io
% 0x100);
835 it87_irq
= it87_read(IT87_CIR_IRQ
);
836 if (digimatrix
|| it87_irq
== 0) {
838 irq
= IT87_CIR_DEFAULT_IRQ
;
839 printk(KERN_INFO LIRC_DRIVER_NAME
840 ": set default irq 0x%x\n",
842 it87_write(IT87_CIR_IRQ
, irq
);
846 spin_lock_irqsave(&hardware_lock
, hw_flags
);
848 outb(IT87_CIR_IER_RESET
, io
+IT87_CIR_IER
);
850 outb(IT87_CIR_TCR1_FIFOCLR
|
851 /* IT87_CIR_TCR1_ILE | */
852 IT87_CIR_TCR1_TXRLE
|
853 IT87_CIR_TCR1_TXENDF
, io
+IT87_CIR_TCR1
);
854 spin_unlock_irqrestore(&hardware_lock
, hw_flags
);
856 /* get I/O port access and IRQ line */
857 if (request_region(io
, 8, LIRC_DRIVER_NAME
) == NULL
) {
858 printk(KERN_ERR LIRC_DRIVER_NAME
859 ": i/o port 0x%.4x already in use.\n", io
);
860 /* Leaving MB PnP Mode */
861 it87_write(IT87_CFGCTRL
, 0x2);
865 /* activate CIR-Device */
866 it87_write(IT87_CIR_ACT
, 0x1);
868 /* Leaving MB PnP Mode */
869 it87_write(IT87_CFGCTRL
, 0x2);
871 retval
= request_irq(irq
, it87_interrupt
, 0 /*IRQF_DISABLED*/,
872 LIRC_DRIVER_NAME
, NULL
);
874 printk(KERN_ERR LIRC_DRIVER_NAME
875 ": IRQ %d already in use.\n",
877 release_region(io
, 8);
881 printk(KERN_INFO LIRC_DRIVER_NAME
882 ": I/O port 0x%.4x, IRQ %d.\n", io
, irq
);
884 init_timer(&timerlist
);
885 timerlist
.function
= it87_timeout
;
886 timerlist
.data
= 0xabadcafe;
892 static void drop_port(void)
895 unsigned char init_bytes
[4] = IT87_INIT
;
897 /* Enter MB PnP Mode */
898 outb(init_bytes
[0], IT87_ADRPORT
);
899 outb(init_bytes
[1], IT87_ADRPORT
);
900 outb(init_bytes
[2], IT87_ADRPORT
);
901 outb(init_bytes
[3], IT87_ADRPORT
);
903 /* deactivate CIR-Device */
904 it87_write(IT87_CIR_ACT
, 0x0);
906 /* Leaving MB PnP Mode */
907 it87_write(IT87_CFGCTRL
, 0x2);
910 del_timer_sync(&timerlist
);
912 release_region(io
, 8);
916 static int init_lirc_it87(void)
920 init_waitqueue_head(&lirc_read_queue
);
921 retval
= init_port();
925 printk(KERN_INFO LIRC_DRIVER_NAME
": Installed.\n");
929 static int it87_probe(struct pnp_dev
*pnp_dev
,
930 const struct pnp_device_id
*dev_id
)
934 driver
.dev
= &pnp_dev
->dev
;
936 retval
= init_chrdev();
940 retval
= init_lirc_it87();
942 goto init_lirc_it87_failed
;
946 init_lirc_it87_failed
:
952 static int __init
lirc_it87_init(void)
954 return pnp_register_driver(&it87_pnp_driver
);
958 static void __exit
lirc_it87_exit(void)
963 pnp_unregister_driver(&it87_pnp_driver
);
964 printk(KERN_INFO LIRC_DRIVER_NAME
": Uninstalled.\n");
967 /* SECTION: PNP for ITE8704/18 */
969 static const struct pnp_device_id pnp_dev_table
[] = {
974 MODULE_DEVICE_TABLE(pnp
, pnp_dev_table
);
976 static struct pnp_driver it87_pnp_driver
= {
977 .name
= LIRC_DRIVER_NAME
,
978 .id_table
= pnp_dev_table
,
982 module_init(lirc_it87_init
);
983 module_exit(lirc_it87_exit
);
985 MODULE_DESCRIPTION("LIRC driver for ITE IT8704/05/12/18/20 CIR port");
986 MODULE_AUTHOR("Hans-Gunter Lutke Uphues");
987 MODULE_LICENSE("GPL");
989 module_param(io
, int, S_IRUGO
);
990 MODULE_PARM_DESC(io
, "I/O base address (default: 0x310)");
992 module_param(irq
, int, S_IRUGO
);
993 #ifdef LIRC_IT87_DIGIMATRIX
994 MODULE_PARM_DESC(irq
, "Interrupt (1,3-12) (default: 9)");
996 MODULE_PARM_DESC(irq
, "Interrupt (1,3-12) (default: 7)");
999 module_param(it87_enable_demodulator
, bool, S_IRUGO
);
1000 MODULE_PARM_DESC(it87_enable_demodulator
,
1001 "Receiver demodulator enable/disable (1/0), default: 0");
1003 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
1004 MODULE_PARM_DESC(debug
, "Enable debugging messages");
1006 module_param(digimatrix
, bool, S_IRUGO
| S_IWUSR
);
1007 #ifdef LIRC_IT87_DIGIMATRIX
1008 MODULE_PARM_DESC(digimatrix
,
1009 "Asus Digimatrix it87 compat. enable/disable (1/0), default: 1");
1011 MODULE_PARM_DESC(digimatrix
,
1012 "Asus Digimatrix it87 compat. enable/disable (1/0), default: 0");
1016 module_param(it87_freq
, int, S_IRUGO
);
1017 #ifdef LIRC_IT87_DIGIMATRIX
1018 MODULE_PARM_DESC(it87_freq
,
1019 "Carrier demodulator frequency (kHz), (default: 36)");
1021 MODULE_PARM_DESC(it87_freq
,
1022 "Carrier demodulator frequency (kHz), (default: 38)");