[PATCH 06/15] staging/lirc: add lirc_it87 driver
From: Jarod Wilson
Date: Mon Jul 26 2010 - 19:30:18 EST
Signed-off-by: Jarod Wilson <jarod@xxxxxxxxxx>
---
drivers/staging/lirc/lirc_it87.c | 1019 ++++++++++++++++++++++++++++++++++++++
drivers/staging/lirc/lirc_it87.h | 116 +++++
2 files changed, 1135 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/lirc/lirc_it87.c
create mode 100644 drivers/staging/lirc/lirc_it87.h
diff --git a/drivers/staging/lirc/lirc_it87.c b/drivers/staging/lirc/lirc_it87.c
new file mode 100644
index 0000000..781abc3
--- /dev/null
+++ b/drivers/staging/lirc/lirc_it87.c
@@ -0,0 +1,1019 @@
+/*
+ * LIRC driver for ITE IT8712/IT8705 CIR port
+ *
+ * Copyright (C) 2001 Hans-Gunter Lutke Uphues <hg_lu@xxxxxx>
+ *
+ * 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@xxxxxxxxxxxx> :
+ * 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@xxxxxxxxxxx>
+ * 2009/12/24 James Edwards <jimbo-lirc@xxxxxxxxxxxxxxx> 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 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 (module_refcount(THIS_MODULE)) {
+ spin_unlock(&dev_lock);
+ return -EBUSY;
+ }
+ spin_unlock(&dev_lock);
+ return 0;
+}
+
+
+static int lirc_close(struct inode *inode, struct file *file)
+{
+ 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]);
+ return n;
+}
+
+
+static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
+{
+ int retval = 0;
+ unsigned long value = 0;
+ unsigned int ivalue;
+ 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, (unsigned long *) arg);
+ break;
+
+ case LIRC_SET_SEND_MODE:
+ case LIRC_SET_REC_MODE:
+ retval = get_user(value, (unsigned long *) arg);
+ break;
+
+ case LIRC_SET_SEND_CARRIER:
+ retval = get_user(ivalue, (unsigned int *) arg);
+ if (retval)
+ return retval;
+ ivalue /= 1000;
+ if (ivalue > IT87_CIR_FREQ_MAX ||
+ ivalue < IT87_CIR_FREQ_MIN)
+ return -EINVAL;
+
+ it87_freq = ivalue;
+
+ 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 struct file_operations lirc_fops = {
+ .owner = THIS_MODULE,
+ .read = lirc_read,
+ .write = lirc_write,
+ .poll = lirc_poll,
+ .unlocked_ioctl = lirc_ioctl,
+ .open = lirc_open,
+ .release = lirc_close,
+};
+
+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,
+};
+
+
+#ifdef 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);
+}
+#endif
+
+
+/* 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 ITE8704/18 */
+
+static const struct pnp_device_id pnp_dev_table[] = {
+ {"ITE8704", 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
diff --git a/drivers/staging/lirc/lirc_it87.h b/drivers/staging/lirc/lirc_it87.h
new file mode 100644
index 0000000..cf021c8
--- /dev/null
+++ b/drivers/staging/lirc/lirc_it87.h
@@ -0,0 +1,116 @@
+/* lirc_it87.h */
+/* SECTION: Definitions */
+
+/********************************* ITE IT87xx ************************/
+
+/* based on the following documentation from ITE:
+ a) IT8712F Preliminary CIR Programming Guide V0.1
+ b) IT8705F Simple LPC I/O Preliminary Specification V0.3
+ c) IT8712F EC-LPC I/O Preliminary Specification V0.5
+*/
+
+/* IT8712/05 Ports: */
+#define IT87_ADRPORT 0x2e
+#define IT87_DATAPORT 0x2f
+#define IT87_INIT {0x87, 0x01, 0x55, 0x55}
+
+/* alternate Ports: */
+/*
+#define IT87_ADRPORT 0x4e
+#define IT87_DATAPORT 0x4f
+#define IT87_INIT {0x87, 0x01, 0x55, 0xaa}
+ */
+
+/* IT8712/05 Registers */
+#define IT87_CFGCTRL 0x2
+#define IT87_LDN 0x7
+#define IT87_CHIP_ID1 0x20
+#define IT87_CHIP_ID2 0x21
+#define IT87_CFG_VERSION 0x22
+#define IT87_SWSUSPEND 0x23
+
+#define IT8712_CIR_LDN 0xa
+#define IT8705_CIR_LDN 0x7
+
+/* CIR Configuration Registers: */
+#define IT87_CIR_ACT 0x30
+#define IT87_CIR_BASE_MSB 0x60
+#define IT87_CIR_BASE_LSB 0x61
+#define IT87_CIR_IRQ 0x70
+#define IT87_CIR_CONFIG 0xf0
+
+/* List of IT87_CIR registers: offset to BaseAddr */
+#define IT87_CIR_DR 0
+#define IT87_CIR_IER 1
+#define IT87_CIR_RCR 2
+#define IT87_CIR_TCR1 3
+#define IT87_CIR_TCR2 4
+#define IT87_CIR_TSR 5
+#define IT87_CIR_RSR 6
+#define IT87_CIR_BDLR 5
+#define IT87_CIR_BDHR 6
+#define IT87_CIR_IIR 7
+
+/* Bit Definition */
+/* IER: */
+#define IT87_CIR_IER_TM_EN 0x80
+#define IT87_CIR_IER_RESEVED 0x40
+#define IT87_CIR_IER_RESET 0x20
+#define IT87_CIR_IER_BR 0x10
+#define IT87_CIR_IER_IEC 0x8
+#define IT87_CIR_IER_RFOIE 0x4
+#define IT87_CIR_IER_RDAIE 0x2
+#define IT87_CIR_IER_TLDLIE 0x1
+
+/* RCR: */
+#define IT87_CIR_RCR_RDWOS 0x80
+#define IT87_CIR_RCR_HCFS 0x40
+#define IT87_CIR_RCR_RXEN 0x20
+#define IT87_CIR_RCR_RXEND 0x10
+#define IT87_CIR_RCR_RXACT 0x8
+#define IT87_CIR_RCR_RXDCR 0x7
+
+/* TCR1: */
+#define IT87_CIR_TCR1_FIFOCLR 0x80
+#define IT87_CIR_TCR1_ILE 0x40
+#define IT87_CIR_TCR1_FIFOTL 0x30
+#define IT87_CIR_TCR1_TXRLE 0x8
+#define IT87_CIR_TCR1_TXENDF 0x4
+#define IT87_CIR_TCR1_TXMPM 0x3
+
+/* TCR2: */
+#define IT87_CIR_TCR2_CFQ 0xf8
+#define IT87_CIR_TCR2_TXMPW 0x7
+
+/* TSR: */
+#define IT87_CIR_TSR_RESERVED 0xc0
+#define IT87_CIR_TSR_TXFBC 0x3f
+
+/* RSR: */
+#define IT87_CIR_RSR_RXFTO 0x80
+#define IT87_CIR_RSR_RESERVED 0x40
+#define IT87_CIR_RSR_RXFBC 0x3f
+
+/* IIR: */
+#define IT87_CIR_IIR_RESERVED 0xf8
+#define IT87_CIR_IIR_IID 0x6
+#define IT87_CIR_IIR_IIP 0x1
+
+/* TM: */
+#define IT87_CIR_TM_IL_SEL 0x80
+#define IT87_CIR_TM_RESERVED 0x40
+#define IT87_CIR_TM_TM_REG 0x3f
+
+#define IT87_CIR_FIFO_SIZE 32
+
+/* Baudratedivisor for IT87: power of 2: only 1,2,4 or 8) */
+#define IT87_CIR_BAUDRATE_DIVISOR 0x1
+#define IT87_CIR_DEFAULT_IOBASE 0x310
+#define IT87_CIR_DEFAULT_IRQ 0x7
+#define IT87_CIR_SPACE 0x00
+#define IT87_CIR_PULSE 0xff
+#define IT87_CIR_FREQ_MIN 27
+#define IT87_CIR_FREQ_MAX 58
+#define TIME_CONST (IT87_CIR_BAUDRATE_DIVISOR * 8000000ul / 115200ul)
+
+/********************************* ITE IT87xx ************************/
--
1.7.1.1
--
Jarod Wilson
jarod@xxxxxxxxxx
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