88914bdf8c
When the lirc drivers were converted over to using memdup_user, I mistakenly also removed corresponding calls to kfree. Add those back. I also screwed up on the allocation error check in lirc_serial, using if (PTR_ERR()) instead of if (IS_ERR()), which broke transmit. Reported-by: Jiri Fojtasek <jiri.fojtasek@hlohovec.net> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1028 lines
24 KiB
C
1028 lines
24 KiB
C
/*
|
|
* LIRC driver for ITE IT8712/IT8705 CIR port
|
|
*
|
|
* Copyright (C) 2001 Hans-Gunter Lutke Uphues <hg_lu@web.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
* USA
|
|
*
|
|
* ITE IT8705 and IT8712(not tested) and IT8720 CIR-port support for lirc based
|
|
* via cut and paste from lirc_sir.c (C) 2000 Milan Pikula
|
|
*
|
|
* Attention: Sendmode only tested with debugging logs
|
|
*
|
|
* 2001/02/27 Christoph Bartelmus <lirc@bartelmus.de> :
|
|
* reimplemented read function
|
|
* 2005/06/05 Andrew Calkin implemented support for Asus Digimatrix,
|
|
* based on work of the following member of the Outertrack Digimatrix
|
|
* Forum: Art103 <r_tay@hotmail.com>
|
|
* 2009/12/24 James Edwards <jimbo-lirc@edwardsclan.net> implemeted support
|
|
* for ITE8704/ITE8718, on my machine, the DSDT reports 8704, but the
|
|
* chip identifies as 18.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/signal.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/time.h>
|
|
#include <linux/string.h>
|
|
#include <linux/types.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/poll.h>
|
|
#include <asm/system.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/fcntl.h>
|
|
|
|
#include <linux/timer.h>
|
|
#include <linux/pnp.h>
|
|
|
|
#include <media/lirc.h>
|
|
#include <media/lirc_dev.h>
|
|
|
|
#include "lirc_it87.h"
|
|
|
|
#ifdef LIRC_IT87_DIGIMATRIX
|
|
static int digimatrix = 1;
|
|
static int it87_freq = 36; /* kHz */
|
|
static int irq = 9;
|
|
#else
|
|
static int digimatrix;
|
|
static int it87_freq = 38; /* kHz */
|
|
static int irq = IT87_CIR_DEFAULT_IRQ;
|
|
#endif
|
|
|
|
static unsigned long it87_bits_in_byte_out;
|
|
static unsigned long it87_send_counter;
|
|
static unsigned char it87_RXEN_mask = IT87_CIR_RCR_RXEN;
|
|
|
|
#define RBUF_LEN 1024
|
|
|
|
#define LIRC_DRIVER_NAME "lirc_it87"
|
|
|
|
/* timeout for sequences in jiffies (=5/100s) */
|
|
/* must be longer than TIME_CONST */
|
|
#define IT87_TIMEOUT (HZ*5/100)
|
|
|
|
/* module parameters */
|
|
static int debug;
|
|
#define dprintk(fmt, args...) \
|
|
do { \
|
|
if (debug) \
|
|
printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \
|
|
fmt, ## args); \
|
|
} while (0)
|
|
|
|
static int io = IT87_CIR_DEFAULT_IOBASE;
|
|
/* receiver demodulator default: off */
|
|
static int it87_enable_demodulator;
|
|
|
|
static int timer_enabled;
|
|
static DEFINE_SPINLOCK(timer_lock);
|
|
static struct timer_list timerlist;
|
|
/* time of last signal change detected */
|
|
static struct timeval last_tv = {0, 0};
|
|
/* time of last UART data ready interrupt */
|
|
static struct timeval last_intr_tv = {0, 0};
|
|
static int last_value;
|
|
|
|
static DECLARE_WAIT_QUEUE_HEAD(lirc_read_queue);
|
|
|
|
static DEFINE_SPINLOCK(hardware_lock);
|
|
static DEFINE_SPINLOCK(dev_lock);
|
|
static bool device_open;
|
|
|
|
static int rx_buf[RBUF_LEN];
|
|
unsigned int rx_tail, rx_head;
|
|
|
|
static struct pnp_driver it87_pnp_driver;
|
|
|
|
/* SECTION: Prototypes */
|
|
|
|
/* Communication with user-space */
|
|
static int lirc_open(struct inode *inode, struct file *file);
|
|
static int lirc_close(struct inode *inode, struct file *file);
|
|
static unsigned int lirc_poll(struct file *file, poll_table *wait);
|
|
static ssize_t lirc_read(struct file *file, char *buf,
|
|
size_t count, loff_t *ppos);
|
|
static ssize_t lirc_write(struct file *file, const char *buf,
|
|
size_t n, loff_t *pos);
|
|
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
|
|
static void add_read_queue(int flag, unsigned long val);
|
|
static int init_chrdev(void);
|
|
static void drop_chrdev(void);
|
|
/* Hardware */
|
|
static irqreturn_t it87_interrupt(int irq, void *dev_id);
|
|
static void send_space(unsigned long len);
|
|
static void send_pulse(unsigned long len);
|
|
static void init_send(void);
|
|
static void terminate_send(unsigned long len);
|
|
static int init_hardware(void);
|
|
static void drop_hardware(void);
|
|
/* Initialisation */
|
|
static int init_port(void);
|
|
static void drop_port(void);
|
|
|
|
|
|
/* SECTION: Communication with user-space */
|
|
|
|
static int lirc_open(struct inode *inode, struct file *file)
|
|
{
|
|
spin_lock(&dev_lock);
|
|
if (device_open) {
|
|
spin_unlock(&dev_lock);
|
|
return -EBUSY;
|
|
}
|
|
device_open = true;
|
|
spin_unlock(&dev_lock);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int lirc_close(struct inode *inode, struct file *file)
|
|
{
|
|
spin_lock(&dev_lock);
|
|
device_open = false;
|
|
spin_unlock(&dev_lock);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static unsigned int lirc_poll(struct file *file, poll_table *wait)
|
|
{
|
|
poll_wait(file, &lirc_read_queue, wait);
|
|
if (rx_head != rx_tail)
|
|
return POLLIN | POLLRDNORM;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static ssize_t lirc_read(struct file *file, char *buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
int n = 0;
|
|
int retval = 0;
|
|
|
|
while (n < count) {
|
|
if (file->f_flags & O_NONBLOCK && rx_head == rx_tail) {
|
|
retval = -EAGAIN;
|
|
break;
|
|
}
|
|
retval = wait_event_interruptible(lirc_read_queue,
|
|
rx_head != rx_tail);
|
|
if (retval)
|
|
break;
|
|
|
|
if (copy_to_user((void *) buf + n, (void *) (rx_buf + rx_head),
|
|
sizeof(int))) {
|
|
retval = -EFAULT;
|
|
break;
|
|
}
|
|
rx_head = (rx_head + 1) & (RBUF_LEN - 1);
|
|
n += sizeof(int);
|
|
}
|
|
if (n)
|
|
return n;
|
|
return retval;
|
|
}
|
|
|
|
|
|
static ssize_t lirc_write(struct file *file, const char *buf,
|
|
size_t n, loff_t *pos)
|
|
{
|
|
int i = 0;
|
|
int *tx_buf;
|
|
|
|
if (n % sizeof(int))
|
|
return -EINVAL;
|
|
tx_buf = memdup_user(buf, n);
|
|
if (IS_ERR(tx_buf))
|
|
return PTR_ERR(tx_buf);
|
|
n /= sizeof(int);
|
|
init_send();
|
|
while (1) {
|
|
if (i >= n)
|
|
break;
|
|
if (tx_buf[i])
|
|
send_pulse(tx_buf[i]);
|
|
i++;
|
|
if (i >= n)
|
|
break;
|
|
if (tx_buf[i])
|
|
send_space(tx_buf[i]);
|
|
i++;
|
|
}
|
|
terminate_send(tx_buf[i - 1]);
|
|
kfree(tx_buf);
|
|
return n;
|
|
}
|
|
|
|
|
|
static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
|
|
{
|
|
int retval = 0;
|
|
__u32 value = 0;
|
|
unsigned long hw_flags;
|
|
|
|
if (cmd == LIRC_GET_FEATURES)
|
|
value = LIRC_CAN_SEND_PULSE |
|
|
LIRC_CAN_SET_SEND_CARRIER |
|
|
LIRC_CAN_REC_MODE2;
|
|
else if (cmd == LIRC_GET_SEND_MODE)
|
|
value = LIRC_MODE_PULSE;
|
|
else if (cmd == LIRC_GET_REC_MODE)
|
|
value = LIRC_MODE_MODE2;
|
|
|
|
switch (cmd) {
|
|
case LIRC_GET_FEATURES:
|
|
case LIRC_GET_SEND_MODE:
|
|
case LIRC_GET_REC_MODE:
|
|
retval = put_user(value, (__u32 *) arg);
|
|
break;
|
|
|
|
case LIRC_SET_SEND_MODE:
|
|
case LIRC_SET_REC_MODE:
|
|
retval = get_user(value, (__u32 *) arg);
|
|
break;
|
|
|
|
case LIRC_SET_SEND_CARRIER:
|
|
retval = get_user(value, (__u32 *) arg);
|
|
if (retval)
|
|
return retval;
|
|
value /= 1000;
|
|
if (value > IT87_CIR_FREQ_MAX ||
|
|
value < IT87_CIR_FREQ_MIN)
|
|
return -EINVAL;
|
|
|
|
it87_freq = value;
|
|
|
|
spin_lock_irqsave(&hardware_lock, hw_flags);
|
|
outb(((inb(io + IT87_CIR_TCR2) & IT87_CIR_TCR2_TXMPW) |
|
|
(it87_freq - IT87_CIR_FREQ_MIN) << 3),
|
|
io + IT87_CIR_TCR2);
|
|
spin_unlock_irqrestore(&hardware_lock, hw_flags);
|
|
dprintk("demodulation frequency: %d kHz\n", it87_freq);
|
|
|
|
break;
|
|
|
|
default:
|
|
retval = -EINVAL;
|
|
}
|
|
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (cmd == LIRC_SET_REC_MODE) {
|
|
if (value != LIRC_MODE_MODE2)
|
|
retval = -ENOSYS;
|
|
} else if (cmd == LIRC_SET_SEND_MODE) {
|
|
if (value != LIRC_MODE_PULSE)
|
|
retval = -ENOSYS;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static void add_read_queue(int flag, unsigned long val)
|
|
{
|
|
unsigned int new_rx_tail;
|
|
int newval;
|
|
|
|
dprintk("add flag %d with val %lu\n", flag, val);
|
|
|
|
newval = val & PULSE_MASK;
|
|
|
|
/*
|
|
* statistically, pulses are ~TIME_CONST/2 too long. we could
|
|
* maybe make this more exact, but this is good enough
|
|
*/
|
|
if (flag) {
|
|
/* pulse */
|
|
if (newval > TIME_CONST / 2)
|
|
newval -= TIME_CONST / 2;
|
|
else /* should not ever happen */
|
|
newval = 1;
|
|
newval |= PULSE_BIT;
|
|
} else
|
|
newval += TIME_CONST / 2;
|
|
new_rx_tail = (rx_tail + 1) & (RBUF_LEN - 1);
|
|
if (new_rx_tail == rx_head) {
|
|
dprintk("Buffer overrun.\n");
|
|
return;
|
|
}
|
|
rx_buf[rx_tail] = newval;
|
|
rx_tail = new_rx_tail;
|
|
wake_up_interruptible(&lirc_read_queue);
|
|
}
|
|
|
|
|
|
static const struct file_operations lirc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = lirc_read,
|
|
.write = lirc_write,
|
|
.poll = lirc_poll,
|
|
.unlocked_ioctl = lirc_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = lirc_ioctl,
|
|
#endif
|
|
.open = lirc_open,
|
|
.release = lirc_close,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static int set_use_inc(void *data)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void set_use_dec(void *data)
|
|
{
|
|
}
|
|
|
|
static struct lirc_driver driver = {
|
|
.name = LIRC_DRIVER_NAME,
|
|
.minor = -1,
|
|
.code_length = 1,
|
|
.sample_rate = 0,
|
|
.data = NULL,
|
|
.add_to_buf = NULL,
|
|
.set_use_inc = set_use_inc,
|
|
.set_use_dec = set_use_dec,
|
|
.fops = &lirc_fops,
|
|
.dev = NULL,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
|
|
static int init_chrdev(void)
|
|
{
|
|
driver.minor = lirc_register_driver(&driver);
|
|
|
|
if (driver.minor < 0) {
|
|
printk(KERN_ERR LIRC_DRIVER_NAME ": init_chrdev() failed.\n");
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void drop_chrdev(void)
|
|
{
|
|
lirc_unregister_driver(driver.minor);
|
|
}
|
|
|
|
|
|
/* SECTION: Hardware */
|
|
static long delta(struct timeval *tv1, struct timeval *tv2)
|
|
{
|
|
unsigned long deltv;
|
|
|
|
deltv = tv2->tv_sec - tv1->tv_sec;
|
|
if (deltv > 15)
|
|
deltv = 0xFFFFFF;
|
|
else
|
|
deltv = deltv*1000000 + tv2->tv_usec - tv1->tv_usec;
|
|
return deltv;
|
|
}
|
|
|
|
static void it87_timeout(unsigned long data)
|
|
{
|
|
unsigned long flags;
|
|
|
|
/* avoid interference with interrupt */
|
|
spin_lock_irqsave(&timer_lock, flags);
|
|
|
|
if (digimatrix) {
|
|
/* We have timed out. Disable the RX mechanism. */
|
|
|
|
outb((inb(io + IT87_CIR_RCR) & ~IT87_CIR_RCR_RXEN) |
|
|
IT87_CIR_RCR_RXACT, io + IT87_CIR_RCR);
|
|
if (it87_RXEN_mask)
|
|
outb(inb(io + IT87_CIR_RCR) | IT87_CIR_RCR_RXEN,
|
|
io + IT87_CIR_RCR);
|
|
dprintk(" TIMEOUT\n");
|
|
timer_enabled = 0;
|
|
|
|
/* fifo clear */
|
|
outb(inb(io + IT87_CIR_TCR1) | IT87_CIR_TCR1_FIFOCLR,
|
|
io+IT87_CIR_TCR1);
|
|
|
|
} else {
|
|
/*
|
|
* if last received signal was a pulse, but receiving stopped
|
|
* within the 9 bit frame, we need to finish this pulse and
|
|
* simulate a signal change to from pulse to space. Otherwise
|
|
* upper layers will receive two sequences next time.
|
|
*/
|
|
|
|
if (last_value) {
|
|
unsigned long pulse_end;
|
|
|
|
/* determine 'virtual' pulse end: */
|
|
pulse_end = delta(&last_tv, &last_intr_tv);
|
|
dprintk("timeout add %d for %lu usec\n",
|
|
last_value, pulse_end);
|
|
add_read_queue(last_value, pulse_end);
|
|
last_value = 0;
|
|
last_tv = last_intr_tv;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&timer_lock, flags);
|
|
}
|
|
|
|
static irqreturn_t it87_interrupt(int irq, void *dev_id)
|
|
{
|
|
unsigned char data;
|
|
struct timeval curr_tv;
|
|
static unsigned long deltv;
|
|
unsigned long deltintrtv;
|
|
unsigned long flags, hw_flags;
|
|
int iir, lsr;
|
|
int fifo = 0;
|
|
static char lastbit;
|
|
char bit;
|
|
|
|
/* Bit duration in microseconds */
|
|
const unsigned long bit_duration = 1000000ul /
|
|
(115200 / IT87_CIR_BAUDRATE_DIVISOR);
|
|
|
|
|
|
iir = inb(io + IT87_CIR_IIR);
|
|
|
|
switch (iir & IT87_CIR_IIR_IID) {
|
|
case 0x4:
|
|
case 0x6:
|
|
lsr = inb(io + IT87_CIR_RSR) & (IT87_CIR_RSR_RXFTO |
|
|
IT87_CIR_RSR_RXFBC);
|
|
fifo = lsr & IT87_CIR_RSR_RXFBC;
|
|
dprintk("iir: 0x%x fifo: 0x%x\n", iir, lsr);
|
|
|
|
/* avoid interference with timer */
|
|
spin_lock_irqsave(&timer_lock, flags);
|
|
spin_lock_irqsave(&hardware_lock, hw_flags);
|
|
if (digimatrix) {
|
|
static unsigned long acc_pulse;
|
|
static unsigned long acc_space;
|
|
|
|
do {
|
|
data = inb(io + IT87_CIR_DR);
|
|
data = ~data;
|
|
fifo--;
|
|
if (data != 0x00) {
|
|
if (timer_enabled)
|
|
del_timer(&timerlist);
|
|
/*
|
|
* start timer for end of
|
|
* sequence detection
|
|
*/
|
|
timerlist.expires = jiffies +
|
|
IT87_TIMEOUT;
|
|
add_timer(&timerlist);
|
|
timer_enabled = 1;
|
|
}
|
|
/* Loop through */
|
|
for (bit = 0; bit < 8; ++bit) {
|
|
if ((data >> bit) & 1) {
|
|
++acc_pulse;
|
|
if (lastbit == 0) {
|
|
add_read_queue(0,
|
|
acc_space *
|
|
bit_duration);
|
|
acc_space = 0;
|
|
}
|
|
} else {
|
|
++acc_space;
|
|
if (lastbit == 1) {
|
|
add_read_queue(1,
|
|
acc_pulse *
|
|
bit_duration);
|
|
acc_pulse = 0;
|
|
}
|
|
}
|
|
lastbit = (data >> bit) & 1;
|
|
}
|
|
|
|
} while (fifo != 0);
|
|
} else { /* Normal Operation */
|
|
do {
|
|
del_timer(&timerlist);
|
|
data = inb(io + IT87_CIR_DR);
|
|
|
|
dprintk("data=%02x\n", data);
|
|
do_gettimeofday(&curr_tv);
|
|
deltv = delta(&last_tv, &curr_tv);
|
|
deltintrtv = delta(&last_intr_tv, &curr_tv);
|
|
|
|
dprintk("t %lu , d %d\n",
|
|
deltintrtv, (int)data);
|
|
|
|
/*
|
|
* if nothing came in last 2 cycles,
|
|
* it was gap
|
|
*/
|
|
if (deltintrtv > TIME_CONST * 2) {
|
|
if (last_value) {
|
|
dprintk("GAP\n");
|
|
|
|
/* simulate signal change */
|
|
add_read_queue(last_value,
|
|
deltv -
|
|
deltintrtv);
|
|
last_value = 0;
|
|
last_tv.tv_sec =
|
|
last_intr_tv.tv_sec;
|
|
last_tv.tv_usec =
|
|
last_intr_tv.tv_usec;
|
|
deltv = deltintrtv;
|
|
}
|
|
}
|
|
data = 1;
|
|
if (data ^ last_value) {
|
|
/*
|
|
* deltintrtv > 2*TIME_CONST,
|
|
* remember ? the other case is
|
|
* timeout
|
|
*/
|
|
add_read_queue(last_value,
|
|
deltv-TIME_CONST);
|
|
last_value = data;
|
|
last_tv = curr_tv;
|
|
if (last_tv.tv_usec >= TIME_CONST)
|
|
last_tv.tv_usec -= TIME_CONST;
|
|
else {
|
|
last_tv.tv_sec--;
|
|
last_tv.tv_usec += 1000000 -
|
|
TIME_CONST;
|
|
}
|
|
}
|
|
last_intr_tv = curr_tv;
|
|
if (data) {
|
|
/*
|
|
* start timer for end of
|
|
* sequence detection
|
|
*/
|
|
timerlist.expires =
|
|
jiffies + IT87_TIMEOUT;
|
|
add_timer(&timerlist);
|
|
}
|
|
outb((inb(io + IT87_CIR_RCR) &
|
|
~IT87_CIR_RCR_RXEN) |
|
|
IT87_CIR_RCR_RXACT,
|
|
io + IT87_CIR_RCR);
|
|
if (it87_RXEN_mask)
|
|
outb(inb(io + IT87_CIR_RCR) |
|
|
IT87_CIR_RCR_RXEN,
|
|
io + IT87_CIR_RCR);
|
|
fifo--;
|
|
} while (fifo != 0);
|
|
}
|
|
spin_unlock_irqrestore(&hardware_lock, hw_flags);
|
|
spin_unlock_irqrestore(&timer_lock, flags);
|
|
|
|
return IRQ_RETVAL(IRQ_HANDLED);
|
|
|
|
default:
|
|
/* not our irq */
|
|
dprintk("unknown IRQ (shouldn't happen) !!\n");
|
|
return IRQ_RETVAL(IRQ_NONE);
|
|
}
|
|
}
|
|
|
|
|
|
static void send_it87(unsigned long len, unsigned long stime,
|
|
unsigned char send_byte, unsigned int count_bits)
|
|
{
|
|
long count = len / stime;
|
|
long time_left = 0;
|
|
static unsigned char byte_out;
|
|
unsigned long hw_flags;
|
|
|
|
dprintk("%s: len=%ld, sb=%d\n", __func__, len, send_byte);
|
|
|
|
time_left = (long)len - (long)count * (long)stime;
|
|
count += ((2 * time_left) / stime);
|
|
while (count) {
|
|
long i = 0;
|
|
for (i = 0; i < count_bits; i++) {
|
|
byte_out = (byte_out << 1) | (send_byte & 1);
|
|
it87_bits_in_byte_out++;
|
|
}
|
|
if (it87_bits_in_byte_out == 8) {
|
|
dprintk("out=0x%x, tsr_txfbc: 0x%x\n",
|
|
byte_out,
|
|
inb(io + IT87_CIR_TSR) &
|
|
IT87_CIR_TSR_TXFBC);
|
|
|
|
while ((inb(io + IT87_CIR_TSR) &
|
|
IT87_CIR_TSR_TXFBC) >= IT87_CIR_FIFO_SIZE)
|
|
;
|
|
|
|
spin_lock_irqsave(&hardware_lock, hw_flags);
|
|
outb(byte_out, io + IT87_CIR_DR);
|
|
spin_unlock_irqrestore(&hardware_lock, hw_flags);
|
|
|
|
it87_bits_in_byte_out = 0;
|
|
it87_send_counter++;
|
|
byte_out = 0;
|
|
}
|
|
count--;
|
|
}
|
|
}
|
|
|
|
|
|
/*TODO: maybe exchange space and pulse because it8705 only modulates 0-bits */
|
|
|
|
static void send_space(unsigned long len)
|
|
{
|
|
send_it87(len, TIME_CONST, IT87_CIR_SPACE, IT87_CIR_BAUDRATE_DIVISOR);
|
|
}
|
|
|
|
static void send_pulse(unsigned long len)
|
|
{
|
|
send_it87(len, TIME_CONST, IT87_CIR_PULSE, IT87_CIR_BAUDRATE_DIVISOR);
|
|
}
|
|
|
|
|
|
static void init_send()
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&hardware_lock, flags);
|
|
/* RXEN=0: receiver disable */
|
|
it87_RXEN_mask = 0;
|
|
outb(inb(io + IT87_CIR_RCR) & ~IT87_CIR_RCR_RXEN,
|
|
io + IT87_CIR_RCR);
|
|
spin_unlock_irqrestore(&hardware_lock, flags);
|
|
it87_bits_in_byte_out = 0;
|
|
it87_send_counter = 0;
|
|
}
|
|
|
|
|
|
static void terminate_send(unsigned long len)
|
|
{
|
|
unsigned long flags;
|
|
unsigned long last = 0;
|
|
|
|
last = it87_send_counter;
|
|
/* make sure all necessary data has been sent */
|
|
while (last == it87_send_counter)
|
|
send_space(len);
|
|
/* wait until all data sent */
|
|
while ((inb(io + IT87_CIR_TSR) & IT87_CIR_TSR_TXFBC) != 0)
|
|
;
|
|
/* then re-enable receiver */
|
|
spin_lock_irqsave(&hardware_lock, flags);
|
|
it87_RXEN_mask = IT87_CIR_RCR_RXEN;
|
|
outb(inb(io + IT87_CIR_RCR) | IT87_CIR_RCR_RXEN,
|
|
io + IT87_CIR_RCR);
|
|
spin_unlock_irqrestore(&hardware_lock, flags);
|
|
}
|
|
|
|
|
|
static int init_hardware(void)
|
|
{
|
|
unsigned long flags;
|
|
unsigned char it87_rcr = 0;
|
|
|
|
spin_lock_irqsave(&hardware_lock, flags);
|
|
/* init cir-port */
|
|
/* enable r/w-access to Baudrate-Register */
|
|
outb(IT87_CIR_IER_BR, io + IT87_CIR_IER);
|
|
outb(IT87_CIR_BAUDRATE_DIVISOR % 0x100, io+IT87_CIR_BDLR);
|
|
outb(IT87_CIR_BAUDRATE_DIVISOR / 0x100, io+IT87_CIR_BDHR);
|
|
/* Baudrate Register off, define IRQs: Input only */
|
|
if (digimatrix) {
|
|
outb(IT87_CIR_IER_IEC | IT87_CIR_IER_RFOIE, io + IT87_CIR_IER);
|
|
/* RX: HCFS=0, RXDCR = 001b (33,75..38,25 kHz), RXEN=1 */
|
|
} else {
|
|
outb(IT87_CIR_IER_IEC | IT87_CIR_IER_RDAIE, io + IT87_CIR_IER);
|
|
/* RX: HCFS=0, RXDCR = 001b (35,6..40,3 kHz), RXEN=1 */
|
|
}
|
|
it87_rcr = (IT87_CIR_RCR_RXEN & it87_RXEN_mask) | 0x1;
|
|
if (it87_enable_demodulator)
|
|
it87_rcr |= IT87_CIR_RCR_RXEND;
|
|
outb(it87_rcr, io + IT87_CIR_RCR);
|
|
if (digimatrix) {
|
|
/* Set FIFO depth to 1 byte, and disable TX */
|
|
outb(inb(io + IT87_CIR_TCR1) | 0x00,
|
|
io + IT87_CIR_TCR1);
|
|
|
|
/*
|
|
* TX: it87_freq (36kHz), 'reserved' sensitivity
|
|
* setting (0x00)
|
|
*/
|
|
outb(((it87_freq - IT87_CIR_FREQ_MIN) << 3) | 0x00,
|
|
io + IT87_CIR_TCR2);
|
|
} else {
|
|
/* TX: 38kHz, 13,3us (pulse-width) */
|
|
outb(((it87_freq - IT87_CIR_FREQ_MIN) << 3) | 0x06,
|
|
io + IT87_CIR_TCR2);
|
|
}
|
|
spin_unlock_irqrestore(&hardware_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void drop_hardware(void)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&hardware_lock, flags);
|
|
disable_irq(irq);
|
|
/* receiver disable */
|
|
it87_RXEN_mask = 0;
|
|
outb(0x1, io + IT87_CIR_RCR);
|
|
/* turn off irqs */
|
|
outb(0, io + IT87_CIR_IER);
|
|
/* fifo clear */
|
|
outb(IT87_CIR_TCR1_FIFOCLR, io+IT87_CIR_TCR1);
|
|
/* reset */
|
|
outb(IT87_CIR_IER_RESET, io+IT87_CIR_IER);
|
|
enable_irq(irq);
|
|
spin_unlock_irqrestore(&hardware_lock, flags);
|
|
}
|
|
|
|
|
|
static unsigned char it87_read(unsigned char port)
|
|
{
|
|
outb(port, IT87_ADRPORT);
|
|
return inb(IT87_DATAPORT);
|
|
}
|
|
|
|
|
|
static void it87_write(unsigned char port, unsigned char data)
|
|
{
|
|
outb(port, IT87_ADRPORT);
|
|
outb(data, IT87_DATAPORT);
|
|
}
|
|
|
|
|
|
/* SECTION: Initialisation */
|
|
|
|
static int init_port(void)
|
|
{
|
|
unsigned long hw_flags;
|
|
int retval = 0;
|
|
|
|
unsigned char init_bytes[4] = IT87_INIT;
|
|
unsigned char it87_chipid = 0;
|
|
unsigned char ldn = 0;
|
|
unsigned int it87_io = 0;
|
|
unsigned int it87_irq = 0;
|
|
|
|
/* Enter MB PnP Mode */
|
|
outb(init_bytes[0], IT87_ADRPORT);
|
|
outb(init_bytes[1], IT87_ADRPORT);
|
|
outb(init_bytes[2], IT87_ADRPORT);
|
|
outb(init_bytes[3], IT87_ADRPORT);
|
|
|
|
/* 8712 or 8705 ? */
|
|
it87_chipid = it87_read(IT87_CHIP_ID1);
|
|
if (it87_chipid != 0x87) {
|
|
retval = -ENXIO;
|
|
return retval;
|
|
}
|
|
it87_chipid = it87_read(IT87_CHIP_ID2);
|
|
if ((it87_chipid != 0x05) &&
|
|
(it87_chipid != 0x12) &&
|
|
(it87_chipid != 0x18) &&
|
|
(it87_chipid != 0x20)) {
|
|
printk(KERN_INFO LIRC_DRIVER_NAME
|
|
": no IT8704/05/12/18/20 found (claimed IT87%02x), "
|
|
"exiting..\n", it87_chipid);
|
|
retval = -ENXIO;
|
|
return retval;
|
|
}
|
|
printk(KERN_INFO LIRC_DRIVER_NAME
|
|
": found IT87%02x.\n",
|
|
it87_chipid);
|
|
|
|
/* get I/O-Port and IRQ */
|
|
if (it87_chipid == 0x12 || it87_chipid == 0x18)
|
|
ldn = IT8712_CIR_LDN;
|
|
else
|
|
ldn = IT8705_CIR_LDN;
|
|
it87_write(IT87_LDN, ldn);
|
|
|
|
it87_io = it87_read(IT87_CIR_BASE_MSB) * 256 +
|
|
it87_read(IT87_CIR_BASE_LSB);
|
|
if (it87_io == 0) {
|
|
if (io == 0)
|
|
io = IT87_CIR_DEFAULT_IOBASE;
|
|
printk(KERN_INFO LIRC_DRIVER_NAME
|
|
": set default io 0x%x\n",
|
|
io);
|
|
it87_write(IT87_CIR_BASE_MSB, io / 0x100);
|
|
it87_write(IT87_CIR_BASE_LSB, io % 0x100);
|
|
} else
|
|
io = it87_io;
|
|
|
|
it87_irq = it87_read(IT87_CIR_IRQ);
|
|
if (digimatrix || it87_irq == 0) {
|
|
if (irq == 0)
|
|
irq = IT87_CIR_DEFAULT_IRQ;
|
|
printk(KERN_INFO LIRC_DRIVER_NAME
|
|
": set default irq 0x%x\n",
|
|
irq);
|
|
it87_write(IT87_CIR_IRQ, irq);
|
|
} else
|
|
irq = it87_irq;
|
|
|
|
spin_lock_irqsave(&hardware_lock, hw_flags);
|
|
/* reset */
|
|
outb(IT87_CIR_IER_RESET, io+IT87_CIR_IER);
|
|
/* fifo clear */
|
|
outb(IT87_CIR_TCR1_FIFOCLR |
|
|
/* IT87_CIR_TCR1_ILE | */
|
|
IT87_CIR_TCR1_TXRLE |
|
|
IT87_CIR_TCR1_TXENDF, io+IT87_CIR_TCR1);
|
|
spin_unlock_irqrestore(&hardware_lock, hw_flags);
|
|
|
|
/* get I/O port access and IRQ line */
|
|
if (request_region(io, 8, LIRC_DRIVER_NAME) == NULL) {
|
|
printk(KERN_ERR LIRC_DRIVER_NAME
|
|
": i/o port 0x%.4x already in use.\n", io);
|
|
/* Leaving MB PnP Mode */
|
|
it87_write(IT87_CFGCTRL, 0x2);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* activate CIR-Device */
|
|
it87_write(IT87_CIR_ACT, 0x1);
|
|
|
|
/* Leaving MB PnP Mode */
|
|
it87_write(IT87_CFGCTRL, 0x2);
|
|
|
|
retval = request_irq(irq, it87_interrupt, 0 /*IRQF_DISABLED*/,
|
|
LIRC_DRIVER_NAME, NULL);
|
|
if (retval < 0) {
|
|
printk(KERN_ERR LIRC_DRIVER_NAME
|
|
": IRQ %d already in use.\n",
|
|
irq);
|
|
release_region(io, 8);
|
|
return retval;
|
|
}
|
|
|
|
printk(KERN_INFO LIRC_DRIVER_NAME
|
|
": I/O port 0x%.4x, IRQ %d.\n", io, irq);
|
|
|
|
init_timer(&timerlist);
|
|
timerlist.function = it87_timeout;
|
|
timerlist.data = 0xabadcafe;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void drop_port(void)
|
|
{
|
|
#if 0
|
|
unsigned char init_bytes[4] = IT87_INIT;
|
|
|
|
/* Enter MB PnP Mode */
|
|
outb(init_bytes[0], IT87_ADRPORT);
|
|
outb(init_bytes[1], IT87_ADRPORT);
|
|
outb(init_bytes[2], IT87_ADRPORT);
|
|
outb(init_bytes[3], IT87_ADRPORT);
|
|
|
|
/* deactivate CIR-Device */
|
|
it87_write(IT87_CIR_ACT, 0x0);
|
|
|
|
/* Leaving MB PnP Mode */
|
|
it87_write(IT87_CFGCTRL, 0x2);
|
|
#endif
|
|
|
|
del_timer_sync(&timerlist);
|
|
free_irq(irq, NULL);
|
|
release_region(io, 8);
|
|
}
|
|
|
|
|
|
static int init_lirc_it87(void)
|
|
{
|
|
int retval;
|
|
|
|
init_waitqueue_head(&lirc_read_queue);
|
|
retval = init_port();
|
|
if (retval < 0)
|
|
return retval;
|
|
init_hardware();
|
|
printk(KERN_INFO LIRC_DRIVER_NAME ": Installed.\n");
|
|
return 0;
|
|
}
|
|
|
|
static int it87_probe(struct pnp_dev *pnp_dev,
|
|
const struct pnp_device_id *dev_id)
|
|
{
|
|
int retval;
|
|
|
|
driver.dev = &pnp_dev->dev;
|
|
|
|
retval = init_chrdev();
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
retval = init_lirc_it87();
|
|
if (retval)
|
|
goto init_lirc_it87_failed;
|
|
|
|
return 0;
|
|
|
|
init_lirc_it87_failed:
|
|
drop_chrdev();
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int __init lirc_it87_init(void)
|
|
{
|
|
return pnp_register_driver(&it87_pnp_driver);
|
|
}
|
|
|
|
|
|
static void __exit lirc_it87_exit(void)
|
|
{
|
|
drop_hardware();
|
|
drop_chrdev();
|
|
drop_port();
|
|
pnp_unregister_driver(&it87_pnp_driver);
|
|
printk(KERN_INFO LIRC_DRIVER_NAME ": Uninstalled.\n");
|
|
}
|
|
|
|
/* SECTION: PNP for ITE8704/13/18 */
|
|
|
|
static const struct pnp_device_id pnp_dev_table[] = {
|
|
{"ITE8704", 0},
|
|
{"ITE8713", 0},
|
|
{}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
|
|
|
|
static struct pnp_driver it87_pnp_driver = {
|
|
.name = LIRC_DRIVER_NAME,
|
|
.id_table = pnp_dev_table,
|
|
.probe = it87_probe,
|
|
};
|
|
|
|
module_init(lirc_it87_init);
|
|
module_exit(lirc_it87_exit);
|
|
|
|
MODULE_DESCRIPTION("LIRC driver for ITE IT8704/05/12/18/20 CIR port");
|
|
MODULE_AUTHOR("Hans-Gunter Lutke Uphues");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(io, int, S_IRUGO);
|
|
MODULE_PARM_DESC(io, "I/O base address (default: 0x310)");
|
|
|
|
module_param(irq, int, S_IRUGO);
|
|
#ifdef LIRC_IT87_DIGIMATRIX
|
|
MODULE_PARM_DESC(irq, "Interrupt (1,3-12) (default: 9)");
|
|
#else
|
|
MODULE_PARM_DESC(irq, "Interrupt (1,3-12) (default: 7)");
|
|
#endif
|
|
|
|
module_param(it87_enable_demodulator, bool, S_IRUGO);
|
|
MODULE_PARM_DESC(it87_enable_demodulator,
|
|
"Receiver demodulator enable/disable (1/0), default: 0");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Enable debugging messages");
|
|
|
|
module_param(digimatrix, bool, S_IRUGO | S_IWUSR);
|
|
#ifdef LIRC_IT87_DIGIMATRIX
|
|
MODULE_PARM_DESC(digimatrix,
|
|
"Asus Digimatrix it87 compat. enable/disable (1/0), default: 1");
|
|
#else
|
|
MODULE_PARM_DESC(digimatrix,
|
|
"Asus Digimatrix it87 compat. enable/disable (1/0), default: 0");
|
|
#endif
|
|
|
|
|
|
module_param(it87_freq, int, S_IRUGO);
|
|
#ifdef LIRC_IT87_DIGIMATRIX
|
|
MODULE_PARM_DESC(it87_freq,
|
|
"Carrier demodulator frequency (kHz), (default: 36)");
|
|
#else
|
|
MODULE_PARM_DESC(it87_freq,
|
|
"Carrier demodulator frequency (kHz), (default: 38)");
|
|
#endif
|