+++ /dev/null
-/*
- * 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
+++ /dev/null
-/*
- * LIRC driver for ITE8709 CIR port
- *
- * Copyright (C) 2008 Grégory Lardière <spmf2004-lirc@yahoo.fr>
- *
- * 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
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/pnp.h>
-#include <linux/io.h>
-
-#include <media/lirc.h>
-#include <media/lirc_dev.h>
-
-#define LIRC_DRIVER_NAME "lirc_ite8709"
-
-#define BUF_CHUNK_SIZE sizeof(int)
-#define BUF_SIZE (128*BUF_CHUNK_SIZE)
-
-/*
- * The ITE8709 device seems to be the combination of IT8512 superIO chip and
- * a specific firmware running on the IT8512's embedded micro-controller.
- * In addition of the embedded micro-controller, the IT8512 chip contains a
- * CIR module and several other modules. A few modules are directly accessible
- * by the host CPU, but most of them are only accessible by the
- * micro-controller. The CIR module is only accessible by the micro-controller.
- * The battery-backed SRAM module is accessible by the host CPU and the
- * micro-controller. So one of the MC's firmware role is to act as a bridge
- * between the host CPU and the CIR module. The firmware implements a kind of
- * communication protocol using the SRAM module as a shared memory. The IT8512
- * specification is publicly available on ITE's web site, but the communication
- * protocol is not, so it was reverse-engineered.
- */
-
-/* ITE8709 Registers addresses and values (reverse-engineered) */
-#define ITE8709_MODE 0x1a
-#define ITE8709_REG_ADR 0x1b
-#define ITE8709_REG_VAL 0x1c
-#define ITE8709_IIR 0x1e /* Interrupt identification register */
-#define ITE8709_RFSR 0x1f /* Receiver FIFO status register */
-#define ITE8709_FIFO_START 0x20
-
-#define ITE8709_MODE_READY 0X00
-#define ITE8709_MODE_WRITE 0X01
-#define ITE8709_MODE_READ 0X02
-#define ITE8709_IIR_RDAI 0x02 /* Receiver data available interrupt */
-#define ITE8709_IIR_RFOI 0x04 /* Receiver FIFO overrun interrupt */
-#define ITE8709_RFSR_MASK 0x3f /* FIFO byte count mask */
-
-/*
- * IT8512 CIR-module registers addresses and values
- * (from IT8512 E/F specification v0.4.1)
- */
-#define IT8512_REG_MSTCR 0x01 /* Master control register */
-#define IT8512_REG_IER 0x02 /* Interrupt enable register */
-#define IT8512_REG_CFR 0x04 /* Carrier frequency register */
-#define IT8512_REG_RCR 0x05 /* Receive control register */
-#define IT8512_REG_BDLR 0x08 /* Baud rate divisor low byte register */
-#define IT8512_REG_BDHR 0x09 /* Baud rate divisor high byte register */
-
-#define IT8512_MSTCR_RESET 0x01 /* Reset registers to default value */
-#define IT8512_MSTCR_FIFOCLR 0x02 /* Clear FIFO */
-#define IT8512_MSTCR_FIFOTL_7 0x04 /* FIFO threshold level : 7 */
-#define IT8512_MSTCR_FIFOTL_25 0x0c /* FIFO threshold level : 25 */
-#define IT8512_IER_RDAIE 0x02 /* Enable data interrupt request */
-#define IT8512_IER_RFOIE 0x04 /* Enable FIFO overrun interrupt req */
-#define IT8512_IER_IEC 0x80 /* Enable interrupt request */
-#define IT8512_CFR_CF_36KHZ 0x09 /* Carrier freq : low speed, 36kHz */
-#define IT8512_RCR_RXDCR_1 0x01 /* Demodulation carrier range : 1 */
-#define IT8512_RCR_RXACT 0x08 /* Receiver active */
-#define IT8512_RCR_RXEN 0x80 /* Receiver enable */
-#define IT8512_BDR_6 6 /* Baud rate divisor : 6 */
-
-/* Actual values used by this driver */
-#define CFG_FIFOTL IT8512_MSTCR_FIFOTL_25
-#define CFG_CR_FREQ IT8512_CFR_CF_36KHZ
-#define CFG_DCR IT8512_RCR_RXDCR_1
-#define CFG_BDR IT8512_BDR_6
-#define CFG_TIMEOUT 100000 /* Rearm interrupt when a space is > 100 ms */
-
-static int debug;
-
-struct ite8709_device {
- int use_count;
- int io;
- int irq;
- spinlock_t hardware_lock;
- __u64 acc_pulse;
- __u64 acc_space;
- char lastbit;
- struct timeval last_tv;
- struct lirc_driver driver;
- struct tasklet_struct tasklet;
- char force_rearm;
- char rearmed;
- char device_busy;
-};
-
-#define dprintk(fmt, args...) \
- do { \
- if (debug) \
- printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \
- fmt, ## args); \
- } while (0)
-
-
-static unsigned char ite8709_read(struct ite8709_device *dev,
- unsigned char port)
-{
- outb(port, dev->io);
- return inb(dev->io+1);
-}
-
-static void ite8709_write(struct ite8709_device *dev, unsigned char port,
- unsigned char data)
-{
- outb(port, dev->io);
- outb(data, dev->io+1);
-}
-
-static void ite8709_wait_device(struct ite8709_device *dev)
-{
- int i = 0;
- /*
- * loop until device tells it's ready to continue
- * iterations count is usually ~750 but can sometimes achieve 13000
- */
- for (i = 0; i < 15000; i++) {
- udelay(2);
- if (ite8709_read(dev, ITE8709_MODE) == ITE8709_MODE_READY)
- break;
- }
-}
-
-static void ite8709_write_register(struct ite8709_device *dev,
- unsigned char reg_adr, unsigned char reg_value)
-{
- ite8709_wait_device(dev);
-
- ite8709_write(dev, ITE8709_REG_VAL, reg_value);
- ite8709_write(dev, ITE8709_REG_ADR, reg_adr);
- ite8709_write(dev, ITE8709_MODE, ITE8709_MODE_WRITE);
-}
-
-static void ite8709_init_hardware(struct ite8709_device *dev)
-{
- spin_lock_irq(&dev->hardware_lock);
- dev->device_busy = 1;
- spin_unlock_irq(&dev->hardware_lock);
-
- ite8709_write_register(dev, IT8512_REG_BDHR, (CFG_BDR >> 8) & 0xff);
- ite8709_write_register(dev, IT8512_REG_BDLR, CFG_BDR & 0xff);
- ite8709_write_register(dev, IT8512_REG_CFR, CFG_CR_FREQ);
- ite8709_write_register(dev, IT8512_REG_IER,
- IT8512_IER_IEC | IT8512_IER_RFOIE | IT8512_IER_RDAIE);
- ite8709_write_register(dev, IT8512_REG_RCR, CFG_DCR);
- ite8709_write_register(dev, IT8512_REG_MSTCR,
- CFG_FIFOTL | IT8512_MSTCR_FIFOCLR);
- ite8709_write_register(dev, IT8512_REG_RCR,
- IT8512_RCR_RXEN | IT8512_RCR_RXACT | CFG_DCR);
-
- spin_lock_irq(&dev->hardware_lock);
- dev->device_busy = 0;
- spin_unlock_irq(&dev->hardware_lock);
-
- tasklet_enable(&dev->tasklet);
-}
-
-static void ite8709_drop_hardware(struct ite8709_device *dev)
-{
- tasklet_disable(&dev->tasklet);
-
- spin_lock_irq(&dev->hardware_lock);
- dev->device_busy = 1;
- spin_unlock_irq(&dev->hardware_lock);
-
- ite8709_write_register(dev, IT8512_REG_RCR, 0);
- ite8709_write_register(dev, IT8512_REG_MSTCR,
- IT8512_MSTCR_RESET | IT8512_MSTCR_FIFOCLR);
-
- spin_lock_irq(&dev->hardware_lock);
- dev->device_busy = 0;
- spin_unlock_irq(&dev->hardware_lock);
-}
-
-static int ite8709_set_use_inc(void *data)
-{
- struct ite8709_device *dev;
- dev = data;
- if (dev->use_count == 0)
- ite8709_init_hardware(dev);
- dev->use_count++;
- return 0;
-}
-
-static void ite8709_set_use_dec(void *data)
-{
- struct ite8709_device *dev;
- dev = data;
- dev->use_count--;
- if (dev->use_count == 0)
- ite8709_drop_hardware(dev);
-}
-
-static void ite8709_add_read_queue(struct ite8709_device *dev, int flag,
- __u64 val)
-{
- int value;
-
- dprintk("add a %llu usec %s\n", val, flag ? "pulse" : "space");
-
- value = (val > PULSE_MASK) ? PULSE_MASK : val;
- if (flag)
- value |= PULSE_BIT;
-
- if (!lirc_buffer_full(dev->driver.rbuf)) {
- lirc_buffer_write(dev->driver.rbuf, (void *) &value);
- wake_up(&dev->driver.rbuf->wait_poll);
- }
-}
-
-static irqreturn_t ite8709_interrupt(int irq, void *dev_id)
-{
- unsigned char data;
- int iir, rfsr, i;
- int fifo = 0;
- char bit;
- struct timeval curr_tv;
-
- /* Bit duration in microseconds */
- const unsigned long bit_duration = 1000000ul / (115200 / CFG_BDR);
-
- struct ite8709_device *dev;
- dev = dev_id;
-
- /*
- * If device is busy, we simply discard data because we are in one of
- * these two cases : shutting down or rearming the device, so this
- * doesn't really matter and this avoids waiting too long in IRQ ctx
- */
- spin_lock(&dev->hardware_lock);
- if (dev->device_busy) {
- spin_unlock(&dev->hardware_lock);
- return IRQ_RETVAL(IRQ_HANDLED);
- }
-
- iir = ite8709_read(dev, ITE8709_IIR);
-
- switch (iir) {
- case ITE8709_IIR_RFOI:
- dprintk("fifo overrun, scheduling forced rearm just in case\n");
- dev->force_rearm = 1;
- tasklet_schedule(&dev->tasklet);
- spin_unlock(&dev->hardware_lock);
- return IRQ_RETVAL(IRQ_HANDLED);
-
- case ITE8709_IIR_RDAI:
- rfsr = ite8709_read(dev, ITE8709_RFSR);
- fifo = rfsr & ITE8709_RFSR_MASK;
- if (fifo > 32)
- fifo = 32;
- dprintk("iir: 0x%x rfsr: 0x%x fifo: %d\n", iir, rfsr, fifo);
-
- if (dev->rearmed) {
- do_gettimeofday(&curr_tv);
- dev->acc_space += 1000000ull
- * (curr_tv.tv_sec - dev->last_tv.tv_sec)
- + (curr_tv.tv_usec - dev->last_tv.tv_usec);
- dev->rearmed = 0;
- }
- for (i = 0; i < fifo; i++) {
- data = ite8709_read(dev, i+ITE8709_FIFO_START);
- data = ~data;
- /* Loop through */
- for (bit = 0; bit < 8; ++bit) {
- if ((data >> bit) & 1) {
- dev->acc_pulse += bit_duration;
- if (dev->lastbit == 0) {
- ite8709_add_read_queue(dev, 0,
- dev->acc_space);
- dev->acc_space = 0;
- }
- } else {
- dev->acc_space += bit_duration;
- if (dev->lastbit == 1) {
- ite8709_add_read_queue(dev, 1,
- dev->acc_pulse);
- dev->acc_pulse = 0;
- }
- }
- dev->lastbit = (data >> bit) & 1;
- }
- }
- ite8709_write(dev, ITE8709_RFSR, 0);
-
- if (dev->acc_space > CFG_TIMEOUT) {
- dprintk("scheduling rearm IRQ\n");
- do_gettimeofday(&dev->last_tv);
- dev->force_rearm = 0;
- tasklet_schedule(&dev->tasklet);
- }
-
- spin_unlock(&dev->hardware_lock);
- return IRQ_RETVAL(IRQ_HANDLED);
-
- default:
- /* not our irq */
- dprintk("unknown IRQ (shouldn't happen) !!\n");
- spin_unlock(&dev->hardware_lock);
- return IRQ_RETVAL(IRQ_NONE);
- }
-}
-
-static void ite8709_rearm_irq(unsigned long data)
-{
- struct ite8709_device *dev;
- unsigned long flags;
- dev = (struct ite8709_device *) data;
-
- spin_lock_irqsave(&dev->hardware_lock, flags);
- dev->device_busy = 1;
- spin_unlock_irqrestore(&dev->hardware_lock, flags);
-
- if (dev->force_rearm || dev->acc_space > CFG_TIMEOUT) {
- dprintk("rearming IRQ\n");
- ite8709_write_register(dev, IT8512_REG_RCR,
- IT8512_RCR_RXACT | CFG_DCR);
- ite8709_write_register(dev, IT8512_REG_MSTCR,
- CFG_FIFOTL | IT8512_MSTCR_FIFOCLR);
- ite8709_write_register(dev, IT8512_REG_RCR,
- IT8512_RCR_RXEN | IT8512_RCR_RXACT | CFG_DCR);
- if (!dev->force_rearm)
- dev->rearmed = 1;
- dev->force_rearm = 0;
- }
-
- spin_lock_irqsave(&dev->hardware_lock, flags);
- dev->device_busy = 0;
- spin_unlock_irqrestore(&dev->hardware_lock, flags);
-}
-
-static int ite8709_cleanup(struct ite8709_device *dev, int stage, int errno,
- char *msg)
-{
- if (msg != NULL)
- printk(KERN_ERR LIRC_DRIVER_NAME ": %s\n", msg);
-
- switch (stage) {
- case 6:
- if (dev->use_count > 0)
- ite8709_drop_hardware(dev);
- case 5:
- free_irq(dev->irq, dev);
- case 4:
- release_region(dev->io, 2);
- case 3:
- lirc_unregister_driver(dev->driver.minor);
- case 2:
- lirc_buffer_free(dev->driver.rbuf);
- kfree(dev->driver.rbuf);
- case 1:
- kfree(dev);
- case 0:
- ;
- }
-
- return errno;
-}
-
-static int __devinit ite8709_pnp_probe(struct pnp_dev *dev,
- const struct pnp_device_id *dev_id)
-{
- struct lirc_driver *driver;
- struct ite8709_device *ite8709_dev;
- int ret;
-
- /* Check resources validity */
- if (!pnp_irq_valid(dev, 0))
- return ite8709_cleanup(NULL, 0, -ENODEV, "invalid IRQ");
- if (!pnp_port_valid(dev, 2))
- return ite8709_cleanup(NULL, 0, -ENODEV, "invalid IO port");
-
- /* Allocate memory for device struct */
- ite8709_dev = kzalloc(sizeof(struct ite8709_device), GFP_KERNEL);
- if (ite8709_dev == NULL)
- return ite8709_cleanup(NULL, 0, -ENOMEM, "kzalloc failed");
- pnp_set_drvdata(dev, ite8709_dev);
-
- /* Initialize device struct */
- ite8709_dev->use_count = 0;
- ite8709_dev->irq = pnp_irq(dev, 0);
- ite8709_dev->io = pnp_port_start(dev, 2);
- ite8709_dev->hardware_lock =
- __SPIN_LOCK_UNLOCKED(ite8709_dev->hardware_lock);
- ite8709_dev->acc_pulse = 0;
- ite8709_dev->acc_space = 0;
- ite8709_dev->lastbit = 0;
- do_gettimeofday(&ite8709_dev->last_tv);
- tasklet_init(&ite8709_dev->tasklet, ite8709_rearm_irq,
- (long) ite8709_dev);
- ite8709_dev->force_rearm = 0;
- ite8709_dev->rearmed = 0;
- ite8709_dev->device_busy = 0;
-
- /* Initialize driver struct */
- driver = &ite8709_dev->driver;
- strcpy(driver->name, LIRC_DRIVER_NAME);
- driver->minor = -1;
- driver->code_length = sizeof(int) * 8;
- driver->sample_rate = 0;
- driver->features = LIRC_CAN_REC_MODE2;
- driver->data = ite8709_dev;
- driver->add_to_buf = NULL;
- driver->set_use_inc = ite8709_set_use_inc;
- driver->set_use_dec = ite8709_set_use_dec;
- driver->dev = &dev->dev;
- driver->owner = THIS_MODULE;
-
- /* Initialize LIRC buffer */
- driver->rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
- if (!driver->rbuf)
- return ite8709_cleanup(ite8709_dev, 1, -ENOMEM,
- "can't allocate lirc_buffer");
- if (lirc_buffer_init(driver->rbuf, BUF_CHUNK_SIZE, BUF_SIZE))
- return ite8709_cleanup(ite8709_dev, 1, -ENOMEM,
- "lirc_buffer_init() failed");
-
- /* Register LIRC driver */
- ret = lirc_register_driver(driver);
- if (ret < 0)
- return ite8709_cleanup(ite8709_dev, 2, ret,
- "lirc_register_driver() failed");
-
- /* Reserve I/O port access */
- if (!request_region(ite8709_dev->io, 2, LIRC_DRIVER_NAME))
- return ite8709_cleanup(ite8709_dev, 3, -EBUSY,
- "i/o port already in use");
-
- /* Reserve IRQ line */
- ret = request_irq(ite8709_dev->irq, ite8709_interrupt, 0,
- LIRC_DRIVER_NAME, ite8709_dev);
- if (ret < 0)
- return ite8709_cleanup(ite8709_dev, 4, ret,
- "IRQ already in use");
-
- /* Initialize hardware */
- ite8709_drop_hardware(ite8709_dev); /* Shutdown hw until first use */
-
- printk(KERN_INFO LIRC_DRIVER_NAME ": device found : irq=%d io=0x%x\n",
- ite8709_dev->irq, ite8709_dev->io);
-
- return 0;
-}
-
-static void __devexit ite8709_pnp_remove(struct pnp_dev *dev)
-{
- struct ite8709_device *ite8709_dev;
- ite8709_dev = pnp_get_drvdata(dev);
-
- ite8709_cleanup(ite8709_dev, 6, 0, NULL);
-
- printk(KERN_INFO LIRC_DRIVER_NAME ": device removed\n");
-}
-
-#ifdef CONFIG_PM
-static int ite8709_pnp_suspend(struct pnp_dev *dev, pm_message_t state)
-{
- struct ite8709_device *ite8709_dev;
- ite8709_dev = pnp_get_drvdata(dev);
-
- if (ite8709_dev->use_count > 0)
- ite8709_drop_hardware(ite8709_dev);
-
- return 0;
-}
-
-static int ite8709_pnp_resume(struct pnp_dev *dev)
-{
- struct ite8709_device *ite8709_dev;
- ite8709_dev = pnp_get_drvdata(dev);
-
- if (ite8709_dev->use_count > 0)
- ite8709_init_hardware(ite8709_dev);
-
- return 0;
-}
-#else
-#define ite8709_pnp_suspend NULL
-#define ite8709_pnp_resume NULL
-#endif
-
-static const struct pnp_device_id pnp_dev_table[] = {
- {"ITE8709", 0},
- {}
-};
-
-MODULE_DEVICE_TABLE(pnp, pnp_dev_table);
-
-static struct pnp_driver ite8709_pnp_driver = {
- .name = LIRC_DRIVER_NAME,
- .probe = ite8709_pnp_probe,
- .remove = __devexit_p(ite8709_pnp_remove),
- .suspend = ite8709_pnp_suspend,
- .resume = ite8709_pnp_resume,
- .id_table = pnp_dev_table,
-};
-
-static int __init ite8709_init_module(void)
-{
- return pnp_register_driver(&ite8709_pnp_driver);
-}
-module_init(ite8709_init_module);
-
-static void __exit ite8709_cleanup_module(void)
-{
- pnp_unregister_driver(&ite8709_pnp_driver);
-}
-module_exit(ite8709_cleanup_module);
-
-MODULE_DESCRIPTION("LIRC driver for ITE8709 CIR port");
-MODULE_AUTHOR("Grégory Lardière");
-MODULE_LICENSE("GPL");
-
-module_param(debug, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Enable debugging messages");
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff