Merge branch 'master' into for-next

Fast-forwarded to current state of Linus' tree as there are patches to be
applied for files that didn't exist on the old branch.

1 files changed, 1737 insertions, 0 deletions

diff --git a/drivers/media/rc/ite-cir.c b/drivers/media/rc/ite-cir.c
new file mode 100644
index 000000000000..accaf6c9789a
--- /dev/null
+++ b/drivers/media/rc/ite-cir.c
@@ -0,0 +1,1737 @@
+/*
+ * Driver for ITE Tech Inc. IT8712F/IT8512 CIR
+ *
+ * Copyright (C) 2010 Juan Jesús García de Soria <skandalfo@gmail.com>
+ *
+ * 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.
+ *
+ * Inspired by the original lirc_it87 and lirc_ite8709 drivers, on top of the
+ * skeleton provided by the nuvoton-cir driver.
+ *
+ * The lirc_it87 driver was originally written by Hans-Gunter Lutke Uphues
+ * <hg_lu@web.de> in 2001, with enhancements by Christoph Bartelmus
+ * <lirc@bartelmus.de>, Andrew Calkin <r_tay@hotmail.com> and James Edwards
+ * <jimbo-lirc@edwardsclan.net>.
+ *
+ * The lirc_ite8709 driver was written by Grégory Lardière
+ * <spmf2004-lirc@yahoo.fr> in 2008.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pnp.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/bitops.h>
+#include <media/rc-core.h>
+#include <linux/pci_ids.h>
+#include <linux/delay.h>
+
+#include "ite-cir.h"
+
+/* module parameters */
+
+/* debug level */
+static int debug;
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Enable debugging output");
+
+/* low limit for RX carrier freq, Hz, 0 for no RX demodulation */
+static int rx_low_carrier_freq;
+module_param(rx_low_carrier_freq, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(rx_low_carrier_freq, "Override low RX carrier frequency, Hz, "
+		 "0 for no RX demodulation");
+
+/* high limit for RX carrier freq, Hz, 0 for no RX demodulation */
+static int rx_high_carrier_freq;
+module_param(rx_high_carrier_freq, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(rx_high_carrier_freq, "Override high RX carrier frequency, "
+		 "Hz, 0 for no RX demodulation");
+
+/* override tx carrier frequency */
+static int tx_carrier_freq;
+module_param(tx_carrier_freq, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(tx_carrier_freq, "Override TX carrier frequency, Hz");
+
+/* override tx duty cycle */
+static int tx_duty_cycle;
+module_param(tx_duty_cycle, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(tx_duty_cycle, "Override TX duty cycle, 1-100");
+
+/* override default sample period */
+static long sample_period;
+module_param(sample_period, long, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(sample_period, "Override carrier sample period, us");
+
+/* override detected model id */
+static int model_number = -1;
+module_param(model_number, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(model_number, "Use this model number, don't autodetect");
+
+
+/* HW-independent code functions */
+
+/* check whether carrier frequency is high frequency */
+static inline bool ite_is_high_carrier_freq(unsigned int freq)
+{
+	return freq >= ITE_HCF_MIN_CARRIER_FREQ;
+}
+
+/* get the bits required to program the carrier frequency in CFQ bits,
+ * unshifted */
+static u8 ite_get_carrier_freq_bits(unsigned int freq)
+{
+	if (ite_is_high_carrier_freq(freq)) {
+		if (freq < 425000)
+			return ITE_CFQ_400;
+
+		else if (freq < 465000)
+			return ITE_CFQ_450;
+
+		else if (freq < 490000)
+			return ITE_CFQ_480;
+
+		else
+			return ITE_CFQ_500;
+	} else {
+			/* trim to limits */
+		if (freq < ITE_LCF_MIN_CARRIER_FREQ)
+			freq = ITE_LCF_MIN_CARRIER_FREQ;
+		if (freq > ITE_LCF_MAX_CARRIER_FREQ)
+			freq = ITE_LCF_MAX_CARRIER_FREQ;
+
+		/* convert to kHz and subtract the base freq */
+		freq =
+		    DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ,
+				      1000);
+
+		return (u8) freq;
+	}
+}
+
+/* get the bits required to program the pulse with in TXMPW */
+static u8 ite_get_pulse_width_bits(unsigned int freq, int duty_cycle)
+{
+	unsigned long period_ns, on_ns;
+
+	/* sanitize freq into range */
+	if (freq < ITE_LCF_MIN_CARRIER_FREQ)
+		freq = ITE_LCF_MIN_CARRIER_FREQ;
+	if (freq > ITE_HCF_MAX_CARRIER_FREQ)
+		freq = ITE_HCF_MAX_CARRIER_FREQ;
+
+	period_ns = 1000000000UL / freq;
+	on_ns = period_ns * duty_cycle / 100;
+
+	if (ite_is_high_carrier_freq(freq)) {
+		if (on_ns < 750)
+			return ITE_TXMPW_A;
+
+		else if (on_ns < 850)
+			return ITE_TXMPW_B;
+
+		else if (on_ns < 950)
+			return ITE_TXMPW_C;
+
+		else if (on_ns < 1080)
+			return ITE_TXMPW_D;
+
+		else
+			return ITE_TXMPW_E;
+	} else {
+		if (on_ns < 6500)
+			return ITE_TXMPW_A;
+
+		else if (on_ns < 7850)
+			return ITE_TXMPW_B;
+
+		else if (on_ns < 9650)
+			return ITE_TXMPW_C;
+
+		else if (on_ns < 11950)
+			return ITE_TXMPW_D;
+
+		else
+			return ITE_TXMPW_E;
+	}
+}
+
+/* decode raw bytes as received by the hardware, and push them to the ir-core
+ * layer */
+static void ite_decode_bytes(struct ite_dev *dev, const u8 * data, int
+			     length)
+{
+	u32 sample_period;
+	unsigned long *ldata;
+	unsigned int next_one, next_zero, size;
+	DEFINE_IR_RAW_EVENT(ev);
+
+	if (length == 0)
+		return;
+
+	sample_period = dev->params.sample_period;
+	ldata = (unsigned long *)data;
+	size = length << 3;
+	next_one = find_next_bit_le(ldata, size, 0);
+	if (next_one > 0) {
+		ev.pulse = true;
+		ev.duration =
+		    ITE_BITS_TO_NS(next_one, sample_period);
+		ir_raw_event_store_with_filter(dev->rdev, &ev);
+	}
+
+	while (next_one < size) {
+		next_zero = find_next_zero_bit_le(ldata, size, next_one + 1);
+		ev.pulse = false;
+		ev.duration = ITE_BITS_TO_NS(next_zero - next_one, sample_period);
+		ir_raw_event_store_with_filter(dev->rdev, &ev);
+
+		if (next_zero < size) {
+			next_one =
+			    find_next_bit_le(ldata,
+						     size,
+						     next_zero + 1);
+			ev.pulse = true;
+			ev.duration =
+			    ITE_BITS_TO_NS(next_one - next_zero,
+					   sample_period);
+			ir_raw_event_store_with_filter
+			    (dev->rdev, &ev);
+		} else
+			next_one = size;
+	}
+
+	ir_raw_event_handle(dev->rdev);
+
+	ite_dbg_verbose("decoded %d bytes.", length);
+}
+
+/* set all the rx/tx carrier parameters; this must be called with the device
+ * spinlock held */
+static void ite_set_carrier_params(struct ite_dev *dev)
+{
+	unsigned int freq, low_freq, high_freq;
+	int allowance;
+	bool use_demodulator;
+	bool for_tx = dev->transmitting;
+
+	ite_dbg("%s called", __func__);
+
+	if (for_tx) {
+		/* we don't need no stinking calculations */
+		freq = dev->params.tx_carrier_freq;
+		allowance = ITE_RXDCR_DEFAULT;
+		use_demodulator = false;
+	} else {
+		low_freq = dev->params.rx_low_carrier_freq;
+		high_freq = dev->params.rx_high_carrier_freq;
+
+		if (low_freq == 0) {
+			/* don't demodulate */
+			freq =
+			ITE_DEFAULT_CARRIER_FREQ;
+			allowance = ITE_RXDCR_DEFAULT;
+			use_demodulator = false;
+		} else {
+			/* calculate the middle freq */
+			freq = (low_freq + high_freq) / 2;
+
+			/* calculate the allowance */
+			allowance =
+			    DIV_ROUND_CLOSEST(10000 * (high_freq - low_freq),
+					      ITE_RXDCR_PER_10000_STEP
+					      * (high_freq + low_freq));
+
+			if (allowance < 1)
+				allowance = 1;
+
+			if (allowance > ITE_RXDCR_MAX)
+				allowance = ITE_RXDCR_MAX;
+		}
+	}
+
+	/* set the carrier parameters in a device-dependent way */
+	dev->params.set_carrier_params(dev, ite_is_high_carrier_freq(freq),
+		 use_demodulator, ite_get_carrier_freq_bits(freq), allowance,
+		 ite_get_pulse_width_bits(freq, dev->params.tx_duty_cycle));
+}
+
+/* interrupt service routine for incoming and outgoing CIR data */
+static irqreturn_t ite_cir_isr(int irq, void *data)
+{
+	struct ite_dev *dev = data;
+	unsigned long flags;
+	irqreturn_t ret = IRQ_RETVAL(IRQ_NONE);
+	u8 rx_buf[ITE_RX_FIFO_LEN];
+	int rx_bytes;
+	int iflags;
+
+	ite_dbg_verbose("%s firing", __func__);
+
+	/* grab the spinlock */
+	spin_lock_irqsave(&dev->lock, flags);
+
+	/* read the interrupt flags */
+	iflags = dev->params.get_irq_causes(dev);
+
+	/* check for the receive interrupt */
+	if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
+		/* read the FIFO bytes */
+		rx_bytes =
+			dev->params.get_rx_bytes(dev, rx_buf,
+					     ITE_RX_FIFO_LEN);
+
+		if (rx_bytes > 0) {
+			/* drop the spinlock, since the ir-core layer
+			 * may call us back again through
+			 * ite_s_idle() */
+			spin_unlock_irqrestore(&dev->
+									 lock,
+									 flags);
+
+			/* decode the data we've just received */
+			ite_decode_bytes(dev, rx_buf,
+								   rx_bytes);
+
+			/* reacquire the spinlock */
+			spin_lock_irqsave(&dev->lock,
+								    flags);
+
+			/* mark the interrupt as serviced */
+			ret = IRQ_RETVAL(IRQ_HANDLED);
+		}
+	} else if (iflags & ITE_IRQ_TX_FIFO) {
+		/* FIFO space available interrupt */
+		ite_dbg_verbose("got interrupt for TX FIFO");
+
+		/* wake any sleeping transmitter */
+		wake_up_interruptible(&dev->tx_queue);
+
+		/* mark the interrupt as serviced */
+		ret = IRQ_RETVAL(IRQ_HANDLED);
+	}
+
+	/* drop the spinlock */
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	ite_dbg_verbose("%s done returning %d", __func__, (int)ret);
+
+	return ret;
+}
+
+/* set the rx carrier freq range, guess it's in Hz... */
+static int ite_set_rx_carrier_range(struct rc_dev *rcdev, u32 carrier_low, u32
+				    carrier_high)
+{
+	unsigned long flags;
+	struct ite_dev *dev = rcdev->priv;
+
+	spin_lock_irqsave(&dev->lock, flags);
+	dev->params.rx_low_carrier_freq = carrier_low;
+	dev->params.rx_high_carrier_freq = carrier_high;
+	ite_set_carrier_params(dev);
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return 0;
+}
+
+/* set the tx carrier freq, guess it's in Hz... */
+static int ite_set_tx_carrier(struct rc_dev *rcdev, u32 carrier)
+{
+	unsigned long flags;
+	struct ite_dev *dev = rcdev->priv;
+
+	spin_lock_irqsave(&dev->lock, flags);
+	dev->params.tx_carrier_freq = carrier;
+	ite_set_carrier_params(dev);
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return 0;
+}
+
+/* set the tx duty cycle by controlling the pulse width */
+static int ite_set_tx_duty_cycle(struct rc_dev *rcdev, u32 duty_cycle)
+{
+	unsigned long flags;
+	struct ite_dev *dev = rcdev->priv;
+
+	spin_lock_irqsave(&dev->lock, flags);
+	dev->params.tx_duty_cycle = duty_cycle;
+	ite_set_carrier_params(dev);
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return 0;
+}
+
+/* transmit out IR pulses; what you get here is a batch of alternating
+ * pulse/space/pulse/space lengths that we should write out completely through
+ * the FIFO, blocking on a full FIFO */
+static int ite_tx_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
+{
+	unsigned long flags;
+	struct ite_dev *dev = rcdev->priv;
+	bool is_pulse = false;
+	int remaining_us, fifo_avail, fifo_remaining, last_idx = 0;
+	int max_rle_us, next_rle_us;
+	int ret = n;
+	u8 last_sent[ITE_TX_FIFO_LEN];
+	u8 val;
+
+	ite_dbg("%s called", __func__);
+
+	/* clear the array just in case */
+	memset(last_sent, 0, ARRAY_SIZE(last_sent));
+
+	/* n comes in bytes; convert to ints */
+	n /= sizeof(int);
+
+	spin_lock_irqsave(&dev->lock, flags);
+
+	/* let everybody know we're now transmitting */
+	dev->transmitting = true;
+
+	/* and set the carrier values for transmission */
+	ite_set_carrier_params(dev);
+
+	/* calculate how much time we can send in one byte */
+	max_rle_us =
+	    (ITE_BAUDRATE_DIVISOR * dev->params.sample_period *
+	     ITE_TX_MAX_RLE) / 1000;
+
+	/* disable the receiver */
+	dev->params.disable_rx(dev);
+
+	/* this is where we'll begin filling in the FIFO, until it's full.
+	 * then we'll just activate the interrupt, wait for it to wake us up
+	 * again, disable it, continue filling the FIFO... until everything
+	 * has been pushed out */
+	fifo_avail =
+	    ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
+
+	while (n > 0 && dev->in_use) {
+		/* transmit the next sample */
+		is_pulse = !is_pulse;
+		remaining_us = *(txbuf++);
+		n--;
+
+		ite_dbg("%s: %ld",
+				      ((is_pulse) ? "pulse" : "space"),
+				      (long int)
+				      remaining_us);
+
+		/* repeat while the pulse is non-zero length */
+		while (remaining_us > 0 && dev->in_use) {
+			if (remaining_us > max_rle_us)
+				next_rle_us = max_rle_us;
+
+			else
+				next_rle_us = remaining_us;
+
+			remaining_us -= next_rle_us;
+
+			/* check what's the length we have to pump out */
+			val = (ITE_TX_MAX_RLE * next_rle_us) / max_rle_us;
+
+			/* put it into the sent buffer */
+			last_sent[last_idx++] = val;
+			last_idx &= (ITE_TX_FIFO_LEN);
+
+			/* encode it for 7 bits */
+			val = (val - 1) & ITE_TX_RLE_MASK;
+
+			/* take into account pulse/space prefix */
+			if (is_pulse)
+				val |= ITE_TX_PULSE;
+
+			else
+				val |= ITE_TX_SPACE;
+
+			/*
+			 * if we get to 0 available, read again, just in case
+			 * some other slot got freed
+			 */
+			if (fifo_avail <= 0)
+				fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev);
+
+			/* if it's still full */
+			if (fifo_avail <= 0) {
+				/* enable the tx interrupt */
+				dev->params.
+				enable_tx_interrupt(dev);
+
+				/* drop the spinlock */
+				spin_unlock_irqrestore(&dev->lock, flags);
+
+				/* wait for the FIFO to empty enough */
+				wait_event_interruptible(dev->tx_queue, (fifo_avail = ITE_TX_FIFO_LEN - dev->params.get_tx_used_slots(dev)) >= 8);
+
+				/* get the spinlock again */
+				spin_lock_irqsave(&dev->lock, flags);
+
+				/* disable the tx interrupt again. */
+				dev->params.
+				disable_tx_interrupt(dev);
+			}
+
+			/* now send the byte through the FIFO */
+			dev->params.put_tx_byte(dev, val);
+			fifo_avail--;
+		}
+	}
+
+	/* wait and don't return until the whole FIFO has been sent out;
+	 * otherwise we could configure the RX carrier params instead of the
+	 * TX ones while the transmission is still being performed! */
+	fifo_remaining = dev->params.get_tx_used_slots(dev);
+	remaining_us = 0;
+	while (fifo_remaining > 0) {
+		fifo_remaining--;
+		last_idx--;
+		last_idx &= (ITE_TX_FIFO_LEN - 1);
+		remaining_us += last_sent[last_idx];
+	}
+	remaining_us = (remaining_us * max_rle_us) / (ITE_TX_MAX_RLE);
+
+	/* drop the spinlock while we sleep */
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	/* sleep remaining_us microseconds */
+	mdelay(DIV_ROUND_UP(remaining_us, 1000));
+
+	/* reacquire the spinlock */
+	spin_lock_irqsave(&dev->lock, flags);
+
+	/* now we're not transmitting anymore */
+	dev->transmitting = false;
+
+	/* and set the carrier values for reception */
+	ite_set_carrier_params(dev);
+
+	/* reenable the receiver */
+	if (dev->in_use)
+		dev->params.enable_rx(dev);
+
+	/* notify transmission end */
+	wake_up_interruptible(&dev->tx_ended);
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return ret;
+}
+
+/* idle the receiver if needed */
+static void ite_s_idle(struct rc_dev *rcdev, bool enable)
+{
+	unsigned long flags;
+	struct ite_dev *dev = rcdev->priv;
+
+	ite_dbg("%s called", __func__);
+
+	if (enable) {
+		spin_lock_irqsave(&dev->lock, flags);
+		dev->params.idle_rx(dev);
+		spin_unlock_irqrestore(&dev->lock, flags);
+	}
+}
+
+
+/* IT8712F HW-specific functions */
+
+/* retrieve a bitmask of the current causes for a pending interrupt; this may
+ * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
+ * */
+static int it87_get_irq_causes(struct ite_dev *dev)
+{
+	u8 iflags;
+	int ret = 0;
+
+	ite_dbg("%s called", __func__);
+
+	/* read the interrupt flags */
+	iflags = inb(dev->cir_addr + IT87_IIR) & IT87_II;
+
+	switch (iflags) {
+	case IT87_II_RXDS:
+		ret = ITE_IRQ_RX_FIFO;
+		break;
+	case IT87_II_RXFO:
+		ret = ITE_IRQ_RX_FIFO_OVERRUN;
+		break;
+	case IT87_II_TXLDL:
+		ret = ITE_IRQ_TX_FIFO;
+		break;
+	}
+
+	return ret;
+}
+
+/* set the carrier parameters; to be called with the spinlock held */
+static void it87_set_carrier_params(struct ite_dev *dev, bool high_freq,
+				    bool use_demodulator,
+				    u8 carrier_freq_bits, u8 allowance_bits,
+				    u8 pulse_width_bits)
+{
+	u8 val;
+
+	ite_dbg("%s called", __func__);
+
+	/* program the RCR register */
+	val = inb(dev->cir_addr + IT87_RCR)
+		& ~(IT87_HCFS | IT87_RXEND | IT87_RXDCR);
+
+	if (high_freq)
+		val |= IT87_HCFS;
+
+	if (use_demodulator)
+		val |= IT87_RXEND;
+
+	val |= allowance_bits;
+
+	outb(val, dev->cir_addr + IT87_RCR);
+
+	/* program the TCR2 register */
+	outb((carrier_freq_bits << IT87_CFQ_SHIFT) | pulse_width_bits,
+		dev->cir_addr + IT87_TCR2);
+}
+
+/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
+ * held */
+static int it87_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
+{
+	int fifo, read = 0;
+
+	ite_dbg("%s called", __func__);
+
+	/* read how many bytes are still in the FIFO */
+	fifo = inb(dev->cir_addr + IT87_RSR) & IT87_RXFBC;
+
+	while (fifo > 0 && buf_size > 0) {
+		*(buf++) = inb(dev->cir_addr + IT87_DR);
+		fifo--;
+		read++;
+		buf_size--;
+	}
+
+	return read;
+}
+
+/* return how many bytes are still in the FIFO; this will be called
+ * with the device spinlock NOT HELD while waiting for the TX FIFO to get
+ * empty; let's expect this won't be a problem */
+static int it87_get_tx_used_slots(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	return inb(dev->cir_addr + IT87_TSR) & IT87_TXFBC;
+}
+
+/* put a byte to the TX fifo; this should be called with the spinlock held */
+static void it87_put_tx_byte(struct ite_dev *dev, u8 value)
+{
+	outb(value, dev->cir_addr + IT87_DR);
+}
+
+/* idle the receiver so that we won't receive samples until another
+  pulse is detected; this must be called with the device spinlock held */
+static void it87_idle_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable streaming by clearing RXACT writing it as 1 */
+	outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXACT,
+		dev->cir_addr + IT87_RCR);
+
+	/* clear the FIFO */
+	outb(inb(dev->cir_addr + IT87_TCR1) | IT87_FIFOCLR,
+		dev->cir_addr + IT87_TCR1);
+}
+
+/* disable the receiver; this must be called with the device spinlock held */
+static void it87_disable_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable the receiver interrupts */
+	outb(inb(dev->cir_addr + IT87_IER) & ~(IT87_RDAIE | IT87_RFOIE),
+		dev->cir_addr + IT87_IER);
+
+	/* disable the receiver */
+	outb(inb(dev->cir_addr + IT87_RCR) & ~IT87_RXEN,
+		dev->cir_addr + IT87_RCR);
+
+	/* clear the FIFO and RXACT (actually RXACT should have been cleared
+	* in the previous outb() call) */
+	it87_idle_rx(dev);
+}
+
+/* enable the receiver; this must be called with the device spinlock held */
+static void it87_enable_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable the receiver by setting RXEN */
+	outb(inb(dev->cir_addr + IT87_RCR) | IT87_RXEN,
+		dev->cir_addr + IT87_RCR);
+
+	/* just prepare it to idle for the next reception */
+	it87_idle_rx(dev);
+
+	/* enable the receiver interrupts and master enable flag */
+	outb(inb(dev->cir_addr + IT87_IER) | IT87_RDAIE | IT87_RFOIE | IT87_IEC,
+		dev->cir_addr + IT87_IER);
+}
+
+/* disable the transmitter interrupt; this must be called with the device
+ * spinlock held */
+static void it87_disable_tx_interrupt(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable the transmitter interrupts */
+	outb(inb(dev->cir_addr + IT87_IER) & ~IT87_TLDLIE,
+		dev->cir_addr + IT87_IER);
+}
+
+/* enable the transmitter interrupt; this must be called with the device
+ * spinlock held */
+static void it87_enable_tx_interrupt(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable the transmitter interrupts and master enable flag */
+	outb(inb(dev->cir_addr + IT87_IER) | IT87_TLDLIE | IT87_IEC,
+		dev->cir_addr + IT87_IER);
+}
+
+/* disable the device; this must be called with the device spinlock held */
+static void it87_disable(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* clear out all interrupt enable flags */
+	outb(inb(dev->cir_addr + IT87_IER) &
+		~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE),
+		dev->cir_addr + IT87_IER);
+
+	/* disable the receiver */
+	it87_disable_rx(dev);
+
+	/* erase the FIFO */
+	outb(IT87_FIFOCLR | inb(dev->cir_addr + IT87_TCR1),
+		dev->cir_addr + IT87_TCR1);
+}
+
+/* initialize the hardware */
+static void it87_init_hardware(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable just the baud rate divisor register,
+	disabling all the interrupts at the same time */
+	outb((inb(dev->cir_addr + IT87_IER) &
+		~(IT87_IEC | IT87_RFOIE | IT87_RDAIE | IT87_TLDLIE)) | IT87_BR,
+		dev->cir_addr + IT87_IER);
+
+	/* write out the baud rate divisor */
+	outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT87_BDLR);
+	outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff, dev->cir_addr + IT87_BDHR);
+
+	/* disable the baud rate divisor register again */
+	outb(inb(dev->cir_addr + IT87_IER) & ~IT87_BR,
+		dev->cir_addr + IT87_IER);
+
+	/* program the RCR register defaults */
+	outb(ITE_RXDCR_DEFAULT, dev->cir_addr + IT87_RCR);
+
+	/* program the TCR1 register */
+	outb(IT87_TXMPM_DEFAULT | IT87_TXENDF | IT87_TXRLE
+		| IT87_FIFOTL_DEFAULT | IT87_FIFOCLR,
+		dev->cir_addr + IT87_TCR1);
+
+	/* program the carrier parameters */
+	ite_set_carrier_params(dev);
+}
+
+/* IT8512F on ITE8708 HW-specific functions */
+
+/* retrieve a bitmask of the current causes for a pending interrupt; this may
+ * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
+ * */
+static int it8708_get_irq_causes(struct ite_dev *dev)
+{
+	u8 iflags;
+	int ret = 0;
+
+	ite_dbg("%s called", __func__);
+
+	/* read the interrupt flags */
+	iflags = inb(dev->cir_addr + IT8708_C0IIR);
+
+	if (iflags & IT85_TLDLI)
+		ret |= ITE_IRQ_TX_FIFO;
+	if (iflags & IT85_RDAI)
+		ret |= ITE_IRQ_RX_FIFO;
+	if (iflags & IT85_RFOI)
+		ret |= ITE_IRQ_RX_FIFO_OVERRUN;
+
+	return ret;
+}
+
+/* set the carrier parameters; to be called with the spinlock held */
+static void it8708_set_carrier_params(struct ite_dev *dev, bool high_freq,
+				      bool use_demodulator,
+				      u8 carrier_freq_bits, u8 allowance_bits,
+				      u8 pulse_width_bits)
+{
+	u8 val;
+
+	ite_dbg("%s called", __func__);
+
+	/* program the C0CFR register, with HRAE=1 */
+	outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
+		dev->cir_addr + IT8708_BANKSEL);
+
+	val = (inb(dev->cir_addr + IT8708_C0CFR)
+		& ~(IT85_HCFS | IT85_CFQ)) | carrier_freq_bits;
+
+	if (high_freq)
+		val |= IT85_HCFS;
+
+	outb(val, dev->cir_addr + IT8708_C0CFR);
+
+	outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
+		   dev->cir_addr + IT8708_BANKSEL);
+
+	/* program the C0RCR register */
+	val = inb(dev->cir_addr + IT8708_C0RCR)
+		& ~(IT85_RXEND | IT85_RXDCR);
+
+	if (use_demodulator)
+		val |= IT85_RXEND;
+
+	val |= allowance_bits;
+
+	outb(val, dev->cir_addr + IT8708_C0RCR);
+
+	/* program the C0TCR register */
+	val = inb(dev->cir_addr + IT8708_C0TCR) & ~IT85_TXMPW;
+	val |= pulse_width_bits;
+	outb(val, dev->cir_addr + IT8708_C0TCR);
+}
+
+/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
+ * held */
+static int it8708_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
+{
+	int fifo, read = 0;
+
+	ite_dbg("%s called", __func__);
+
+	/* read how many bytes are still in the FIFO */
+	fifo = inb(dev->cir_addr + IT8708_C0RFSR) & IT85_RXFBC;
+
+	while (fifo > 0 && buf_size > 0) {
+		*(buf++) = inb(dev->cir_addr + IT8708_C0DR);
+		fifo--;
+		read++;
+		buf_size--;
+	}
+
+	return read;
+}
+
+/* return how many bytes are still in the FIFO; this will be called
+ * with the device spinlock NOT HELD while waiting for the TX FIFO to get
+ * empty; let's expect this won't be a problem */
+static int it8708_get_tx_used_slots(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	return inb(dev->cir_addr + IT8708_C0TFSR) & IT85_TXFBC;
+}
+
+/* put a byte to the TX fifo; this should be called with the spinlock held */
+static void it8708_put_tx_byte(struct ite_dev *dev, u8 value)
+{
+	outb(value, dev->cir_addr + IT8708_C0DR);
+}
+
+/* idle the receiver so that we won't receive samples until another
+  pulse is detected; this must be called with the device spinlock held */
+static void it8708_idle_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable streaming by clearing RXACT writing it as 1 */
+	outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXACT,
+		dev->cir_addr + IT8708_C0RCR);
+
+	/* clear the FIFO */
+	outb(inb(dev->cir_addr + IT8708_C0MSTCR) | IT85_FIFOCLR,
+		dev->cir_addr + IT8708_C0MSTCR);
+}
+
+/* disable the receiver; this must be called with the device spinlock held */
+static void it8708_disable_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable the receiver interrupts */
+	outb(inb(dev->cir_addr + IT8708_C0IER) &
+		~(IT85_RDAIE | IT85_RFOIE),
+		dev->cir_addr + IT8708_C0IER);
+
+	/* disable the receiver */
+	outb(inb(dev->cir_addr + IT8708_C0RCR) & ~IT85_RXEN,
+		dev->cir_addr + IT8708_C0RCR);
+
+	/* clear the FIFO and RXACT (actually RXACT should have been cleared
+	 * in the previous outb() call) */
+	it8708_idle_rx(dev);
+}
+
+/* enable the receiver; this must be called with the device spinlock held */
+static void it8708_enable_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable the receiver by setting RXEN */
+	outb(inb(dev->cir_addr + IT8708_C0RCR) | IT85_RXEN,
+		dev->cir_addr + IT8708_C0RCR);
+
+	/* just prepare it to idle for the next reception */
+	it8708_idle_rx(dev);
+
+	/* enable the receiver interrupts and master enable flag */
+	outb(inb(dev->cir_addr + IT8708_C0IER)
+		|IT85_RDAIE | IT85_RFOIE | IT85_IEC,
+		dev->cir_addr + IT8708_C0IER);
+}
+
+/* disable the transmitter interrupt; this must be called with the device
+ * spinlock held */
+static void it8708_disable_tx_interrupt(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable the transmitter interrupts */
+	outb(inb(dev->cir_addr + IT8708_C0IER) & ~IT85_TLDLIE,
+		dev->cir_addr + IT8708_C0IER);
+}
+
+/* enable the transmitter interrupt; this must be called with the device
+ * spinlock held */
+static void it8708_enable_tx_interrupt(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable the transmitter interrupts and master enable flag */
+	outb(inb(dev->cir_addr + IT8708_C0IER)
+		|IT85_TLDLIE | IT85_IEC,
+		dev->cir_addr + IT8708_C0IER);
+}
+
+/* disable the device; this must be called with the device spinlock held */
+static void it8708_disable(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* clear out all interrupt enable flags */
+	outb(inb(dev->cir_addr + IT8708_C0IER) &
+		~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
+		dev->cir_addr + IT8708_C0IER);
+
+	/* disable the receiver */
+	it8708_disable_rx(dev);
+
+	/* erase the FIFO */
+	outb(IT85_FIFOCLR | inb(dev->cir_addr + IT8708_C0MSTCR),
+		dev->cir_addr + IT8708_C0MSTCR);
+}
+
+/* initialize the hardware */
+static void it8708_init_hardware(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable all the interrupts */
+	outb(inb(dev->cir_addr + IT8708_C0IER) &
+		~(IT85_IEC | IT85_RFOIE | IT85_RDAIE | IT85_TLDLIE),
+		dev->cir_addr + IT8708_C0IER);
+
+	/* program the baud rate divisor */
+	outb(inb(dev->cir_addr + IT8708_BANKSEL) | IT8708_HRAE,
+		dev->cir_addr + IT8708_BANKSEL);
+
+	outb(ITE_BAUDRATE_DIVISOR & 0xff, dev->cir_addr + IT8708_C0BDLR);
+	outb((ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
+		   dev->cir_addr + IT8708_C0BDHR);
+
+	outb(inb(dev->cir_addr + IT8708_BANKSEL) & ~IT8708_HRAE,
+		   dev->cir_addr + IT8708_BANKSEL);
+
+	/* program the C0MSTCR register defaults */
+	outb((inb(dev->cir_addr + IT8708_C0MSTCR) &
+			~(IT85_ILSEL | IT85_ILE | IT85_FIFOTL |
+			  IT85_FIFOCLR | IT85_RESET)) |
+		       IT85_FIFOTL_DEFAULT,
+		       dev->cir_addr + IT8708_C0MSTCR);
+
+	/* program the C0RCR register defaults */
+	outb((inb(dev->cir_addr + IT8708_C0RCR) &
+			~(IT85_RXEN | IT85_RDWOS | IT85_RXEND |
+			  IT85_RXACT | IT85_RXDCR)) |
+		       ITE_RXDCR_DEFAULT,
+		       dev->cir_addr + IT8708_C0RCR);
+
+	/* program the C0TCR register defaults */
+	outb((inb(dev->cir_addr + IT8708_C0TCR) &
+			~(IT85_TXMPM | IT85_TXMPW))
+		       |IT85_TXRLE | IT85_TXENDF |
+		       IT85_TXMPM_DEFAULT | IT85_TXMPW_DEFAULT,
+		       dev->cir_addr + IT8708_C0TCR);
+
+	/* program the carrier parameters */
+	ite_set_carrier_params(dev);
+}
+
+/* IT8512F on ITE8709 HW-specific functions */
+
+/* read a byte from the SRAM module */
+static inline u8 it8709_rm(struct ite_dev *dev, int index)
+{
+	outb(index, dev->cir_addr + IT8709_RAM_IDX);
+	return inb(dev->cir_addr + IT8709_RAM_VAL);
+}
+
+/* write a byte to the SRAM module */
+static inline void it8709_wm(struct ite_dev *dev, u8 val, int index)
+{
+	outb(index, dev->cir_addr + IT8709_RAM_IDX);
+	outb(val, dev->cir_addr + IT8709_RAM_VAL);
+}
+
+static void it8709_wait(struct ite_dev *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 (it8709_rm(dev, IT8709_MODE) == IT8709_IDLE)
+			break;
+	}
+}
+
+/* read the value of a CIR register */
+static u8 it8709_rr(struct ite_dev *dev, int index)
+{
+	/* just wait in case the previous access was a write */
+	it8709_wait(dev);
+	it8709_wm(dev, index, IT8709_REG_IDX);
+	it8709_wm(dev, IT8709_READ, IT8709_MODE);
+
+	/* wait for the read data to be available */
+	it8709_wait(dev);
+
+	/* return the read value */
+	return it8709_rm(dev, IT8709_REG_VAL);
+}
+
+/* write the value of a CIR register */
+static void it8709_wr(struct ite_dev *dev, u8 val, int index)
+{
+	/* we wait before writing, and not afterwards, since this allows us to
+	 * pipeline the host CPU with the microcontroller */
+	it8709_wait(dev);
+	it8709_wm(dev, val, IT8709_REG_VAL);
+	it8709_wm(dev, index, IT8709_REG_IDX);
+	it8709_wm(dev, IT8709_WRITE, IT8709_MODE);
+}
+
+/* retrieve a bitmask of the current causes for a pending interrupt; this may
+ * be composed of ITE_IRQ_TX_FIFO, ITE_IRQ_RX_FIFO and ITE_IRQ_RX_FIFO_OVERRUN
+ * */
+static int it8709_get_irq_causes(struct ite_dev *dev)
+{
+	u8 iflags;
+	int ret = 0;
+
+	ite_dbg("%s called", __func__);
+
+	/* read the interrupt flags */
+	iflags = it8709_rm(dev, IT8709_IIR);
+
+	if (iflags & IT85_TLDLI)
+		ret |= ITE_IRQ_TX_FIFO;
+	if (iflags & IT85_RDAI)
+		ret |= ITE_IRQ_RX_FIFO;
+	if (iflags & IT85_RFOI)
+		ret |= ITE_IRQ_RX_FIFO_OVERRUN;
+
+	return ret;
+}
+
+/* set the carrier parameters; to be called with the spinlock held */
+static void it8709_set_carrier_params(struct ite_dev *dev, bool high_freq,
+				      bool use_demodulator,
+				      u8 carrier_freq_bits, u8 allowance_bits,
+				      u8 pulse_width_bits)
+{
+	u8 val;
+
+	ite_dbg("%s called", __func__);
+
+	val = (it8709_rr(dev, IT85_C0CFR)
+		     &~(IT85_HCFS | IT85_CFQ)) |
+	    carrier_freq_bits;
+
+	if (high_freq)
+		val |= IT85_HCFS;
+
+	it8709_wr(dev, val, IT85_C0CFR);
+
+	/* program the C0RCR register */
+	val = it8709_rr(dev, IT85_C0RCR)
+		& ~(IT85_RXEND | IT85_RXDCR);
+
+	if (use_demodulator)
+		val |= IT85_RXEND;
+
+	val |= allowance_bits;
+
+	it8709_wr(dev, val, IT85_C0RCR);
+
+	/* program the C0TCR register */
+	val = it8709_rr(dev, IT85_C0TCR) & ~IT85_TXMPW;
+	val |= pulse_width_bits;
+	it8709_wr(dev, val, IT85_C0TCR);
+}
+
+/* read up to buf_size bytes from the RX FIFO; to be called with the spinlock
+ * held */
+static int it8709_get_rx_bytes(struct ite_dev *dev, u8 * buf, int buf_size)
+{
+	int fifo, read = 0;
+
+	ite_dbg("%s called", __func__);
+
+	/* read how many bytes are still in the FIFO */
+	fifo = it8709_rm(dev, IT8709_RFSR) & IT85_RXFBC;
+
+	while (fifo > 0 && buf_size > 0) {
+		*(buf++) = it8709_rm(dev, IT8709_FIFO + read);
+		fifo--;
+		read++;
+		buf_size--;
+	}
+
+	/* 'clear' the FIFO by setting the writing index to 0; this is
+	 * completely bound to be racy, but we can't help it, since it's a
+	 * limitation of the protocol */
+	it8709_wm(dev, 0, IT8709_RFSR);
+
+	return read;
+}
+
+/* return how many bytes are still in the FIFO; this will be called
+ * with the device spinlock NOT HELD while waiting for the TX FIFO to get
+ * empty; let's expect this won't be a problem */
+static int it8709_get_tx_used_slots(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	return it8709_rr(dev, IT85_C0TFSR) & IT85_TXFBC;
+}
+
+/* put a byte to the TX fifo; this should be called with the spinlock held */
+static void it8709_put_tx_byte(struct ite_dev *dev, u8 value)
+{
+	it8709_wr(dev, value, IT85_C0DR);
+}
+
+/* idle the receiver so that we won't receive samples until another
+  pulse is detected; this must be called with the device spinlock held */
+static void it8709_idle_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable streaming by clearing RXACT writing it as 1 */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXACT,
+			    IT85_C0RCR);
+
+	/* clear the FIFO */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0MSTCR) | IT85_FIFOCLR,
+			    IT85_C0MSTCR);
+}
+
+/* disable the receiver; this must be called with the device spinlock held */
+static void it8709_disable_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable the receiver interrupts */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0IER) &
+			    ~(IT85_RDAIE | IT85_RFOIE),
+			    IT85_C0IER);
+
+	/* disable the receiver */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) & ~IT85_RXEN,
+			    IT85_C0RCR);
+
+	/* clear the FIFO and RXACT (actually RXACT should have been cleared
+	 * in the previous it8709_wr(dev, ) call) */
+	it8709_idle_rx(dev);
+}
+
+/* enable the receiver; this must be called with the device spinlock held */
+static void it8709_enable_rx(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable the receiver by setting RXEN */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0RCR) | IT85_RXEN,
+			    IT85_C0RCR);
+
+	/* just prepare it to idle for the next reception */
+	it8709_idle_rx(dev);
+
+	/* enable the receiver interrupts and master enable flag */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
+			    |IT85_RDAIE | IT85_RFOIE | IT85_IEC,
+			    IT85_C0IER);
+}
+
+/* disable the transmitter interrupt; this must be called with the device
+ * spinlock held */
+static void it8709_disable_tx_interrupt(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable the transmitter interrupts */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0IER) & ~IT85_TLDLIE,
+			    IT85_C0IER);
+}
+
+/* enable the transmitter interrupt; this must be called with the device
+ * spinlock held */
+static void it8709_enable_tx_interrupt(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* enable the transmitter interrupts and master enable flag */
+	it8709_wr(dev, it8709_rr(dev, IT85_C0IER)
+			    |IT85_TLDLIE | IT85_IEC,
+			    IT85_C0IER);
+}
+
+/* disable the device; this must be called with the device spinlock held */
+static void it8709_disable(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* clear out all interrupt enable flags */
+	it8709_wr(dev,
+			    it8709_rr(dev,
+				      IT85_C0IER) & ~(IT85_IEC | IT85_RFOIE |
+						      IT85_RDAIE |
+						      IT85_TLDLIE), IT85_C0IER);
+
+	/* disable the receiver */
+	it8709_disable_rx(dev);
+
+	/* erase the FIFO */
+	it8709_wr(dev, IT85_FIFOCLR | it8709_rr(dev, IT85_C0MSTCR),
+			    IT85_C0MSTCR);
+}
+
+/* initialize the hardware */
+static void it8709_init_hardware(struct ite_dev *dev)
+{
+	ite_dbg("%s called", __func__);
+
+	/* disable all the interrupts */
+	it8709_wr(dev,
+			    it8709_rr(dev,
+				      IT85_C0IER) & ~(IT85_IEC | IT85_RFOIE |
+						      IT85_RDAIE |
+						      IT85_TLDLIE), IT85_C0IER);
+
+	/* program the baud rate divisor */
+	it8709_wr(dev, ITE_BAUDRATE_DIVISOR & 0xff, IT85_C0BDLR);
+	it8709_wr(dev, (ITE_BAUDRATE_DIVISOR >> 8) & 0xff,
+			IT85_C0BDHR);
+
+	/* program the C0MSTCR register defaults */
+	it8709_wr(dev, (it8709_rr(dev, IT85_C0MSTCR) & ~(IT85_ILSEL |
+								   IT85_ILE
+								   | IT85_FIFOTL
+								   |
+								   IT85_FIFOCLR
+								   |
+								   IT85_RESET))
+			    | IT85_FIFOTL_DEFAULT, IT85_C0MSTCR);
+
+	/* program the C0RCR register defaults */
+	it8709_wr(dev,
+			    (it8709_rr(dev, IT85_C0RCR) &
+			     ~(IT85_RXEN | IT85_RDWOS | IT85_RXEND
+			       | IT85_RXACT | IT85_RXDCR)) |
+			    ITE_RXDCR_DEFAULT, IT85_C0RCR);
+
+	/* program the C0TCR register defaults */
+	it8709_wr(dev, (it8709_rr(dev, IT85_C0TCR)
+				  &~(IT85_TXMPM | IT85_TXMPW))
+			    |IT85_TXRLE | IT85_TXENDF |
+			    IT85_TXMPM_DEFAULT |
+			    IT85_TXMPW_DEFAULT, IT85_C0TCR);
+
+	/* program the carrier parameters */
+	ite_set_carrier_params(dev);
+}
+
+
+/* generic hardware setup/teardown code */
+
+/* activate the device for use */
+static int ite_open(struct rc_dev *rcdev)
+{
+	struct ite_dev *dev = rcdev->priv;
+	unsigned long flags;
+
+	ite_dbg("%s called", __func__);
+
+	spin_lock_irqsave(&dev->lock, flags);
+	dev->in_use = true;
+
+	/* enable the receiver */
+	dev->params.enable_rx(dev);
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return 0;
+}
+
+/* deactivate the device for use */
+static void ite_close(struct rc_dev *rcdev)
+{
+	struct ite_dev *dev = rcdev->priv;
+	unsigned long flags;
+
+	ite_dbg("%s called", __func__);
+
+	spin_lock_irqsave(&dev->lock, flags);
+	dev->in_use = false;
+
+	/* wait for any transmission to end */
+	spin_unlock_irqrestore(&dev->lock, flags);
+	wait_event_interruptible(dev->tx_ended, !dev->transmitting);
+	spin_lock_irqsave(&dev->lock, flags);
+
+	dev->params.disable(dev);
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+/* supported models and their parameters */
+static const struct ite_dev_params ite_dev_descs[] = {
+	{	/* 0: ITE8704 */
+	       .model = "ITE8704 CIR transceiver",
+	       .io_region_size = IT87_IOREG_LENGTH,
+	       .hw_tx_capable = true,
+	       .sample_period = (u32) (1000000000ULL / 115200),
+	       .tx_carrier_freq = 38000,
+	       .tx_duty_cycle = 33,
+	       .rx_low_carrier_freq = 0,
+	       .rx_high_carrier_freq = 0,
+
+		/* operations */
+	       .get_irq_causes = it87_get_irq_causes,
+	       .enable_rx = it87_enable_rx,
+	       .idle_rx = it87_idle_rx,
+	       .disable_rx = it87_idle_rx,
+	       .get_rx_bytes = it87_get_rx_bytes,
+	       .enable_tx_interrupt = it87_enable_tx_interrupt,
+	       .disable_tx_interrupt = it87_disable_tx_interrupt,
+	       .get_tx_used_slots = it87_get_tx_used_slots,
+	       .put_tx_byte = it87_put_tx_byte,
+	       .disable = it87_disable,
+	       .init_hardware = it87_init_hardware,
+	       .set_carrier_params = it87_set_carrier_params,
+	       },
+	{	/* 1: ITE8713 */
+	       .model = "ITE8713 CIR transceiver",
+	       .io_region_size = IT87_IOREG_LENGTH,
+	       .hw_tx_capable = true,
+	       .sample_period = (u32) (1000000000ULL / 115200),
+	       .tx_carrier_freq = 38000,
+	       .tx_duty_cycle = 33,
+	       .rx_low_carrier_freq = 0,
+	       .rx_high_carrier_freq = 0,
+
+		/* operations */
+	       .get_irq_causes = it87_get_irq_causes,
+	       .enable_rx = it87_enable_rx,
+	       .idle_rx = it87_idle_rx,
+	       .disable_rx = it87_idle_rx,
+	       .get_rx_bytes = it87_get_rx_bytes,
+	       .enable_tx_interrupt = it87_enable_tx_interrupt,
+	       .disable_tx_interrupt = it87_disable_tx_interrupt,
+	       .get_tx_used_slots = it87_get_tx_used_slots,
+	       .put_tx_byte = it87_put_tx_byte,
+	       .disable = it87_disable,
+	       .init_hardware = it87_init_hardware,
+	       .set_carrier_params = it87_set_carrier_params,
+	       },
+	{	/* 2: ITE8708 */
+	       .model = "ITE8708 CIR transceiver",
+	       .io_region_size = IT8708_IOREG_LENGTH,
+	       .hw_tx_capable = true,
+	       .sample_period = (u32) (1000000000ULL / 115200),
+	       .tx_carrier_freq = 38000,
+	       .tx_duty_cycle = 33,
+	       .rx_low_carrier_freq = 0,
+	       .rx_high_carrier_freq = 0,
+
+		/* operations */
+	       .get_irq_causes = it8708_get_irq_causes,
+	       .enable_rx = it8708_enable_rx,
+	       .idle_rx = it8708_idle_rx,
+	       .disable_rx = it8708_idle_rx,
+	       .get_rx_bytes = it8708_get_rx_bytes,
+	       .enable_tx_interrupt = it8708_enable_tx_interrupt,
+	       .disable_tx_interrupt =
+	       it8708_disable_tx_interrupt,
+	       .get_tx_used_slots = it8708_get_tx_used_slots,
+	       .put_tx_byte = it8708_put_tx_byte,
+	       .disable = it8708_disable,
+	       .init_hardware = it8708_init_hardware,
+	       .set_carrier_params = it8708_set_carrier_params,
+	       },
+	{	/* 3: ITE8709 */
+	       .model = "ITE8709 CIR transceiver",
+	       .io_region_size = IT8709_IOREG_LENGTH,
+	       .hw_tx_capable = true,
+	       .sample_period = (u32) (1000000000ULL / 115200),
+	       .tx_carrier_freq = 38000,
+	       .tx_duty_cycle = 33,
+	       .rx_low_carrier_freq = 0,
+	       .rx_high_carrier_freq = 0,
+
+		/* operations */
+	       .get_irq_causes = it8709_get_irq_causes,
+	       .enable_rx = it8709_enable_rx,
+	       .idle_rx = it8709_idle_rx,
+	       .disable_rx = it8709_idle_rx,
+	       .get_rx_bytes = it8709_get_rx_bytes,
+	       .enable_tx_interrupt = it8709_enable_tx_interrupt,
+	       .disable_tx_interrupt =
+	       it8709_disable_tx_interrupt,
+	       .get_tx_used_slots = it8709_get_tx_used_slots,
+	       .put_tx_byte = it8709_put_tx_byte,
+	       .disable = it8709_disable,
+	       .init_hardware = it8709_init_hardware,
+	       .set_carrier_params = it8709_set_carrier_params,
+	       },
+};
+
+static const struct pnp_device_id ite_ids[] = {
+	{"ITE8704", 0},		/* Default model */
+	{"ITE8713", 1},		/* CIR found in EEEBox 1501U */
+	{"ITE8708", 2},		/* Bridged IT8512 */
+	{"ITE8709", 3},		/* SRAM-Bridged IT8512 */
+	{"", 0},
+};
+
+/* allocate memory, probe hardware, and initialize everything */
+static int ite_probe(struct pnp_dev *pdev, const struct pnp_device_id
+		     *dev_id)
+{
+	const struct ite_dev_params *dev_desc = NULL;
+	struct ite_dev *itdev = NULL;
+	struct rc_dev *rdev = NULL;
+	int ret = -ENOMEM;
+	int model_no;
+
+	ite_dbg("%s called", __func__);
+
+	itdev = kzalloc(sizeof(struct ite_dev), GFP_KERNEL);
+	if (!itdev)
+		return ret;
+
+	/* input device for IR remote (and tx) */
+	rdev = rc_allocate_device();
+	if (!rdev)
+		goto failure;
+
+	ret = -ENODEV;
+
+	/* get the model number */
+	model_no = (int)dev_id->driver_data;
+	ite_pr(KERN_NOTICE, "Auto-detected model: %s\n",
+		ite_dev_descs[model_no].model);
+
+	if (model_number >= 0 && model_number < ARRAY_SIZE(ite_dev_descs)) {
+		model_no = model_number;
+		ite_pr(KERN_NOTICE, "The model has been fixed by a module "
+			"parameter.");
+	}
+
+	ite_pr(KERN_NOTICE, "Using model: %s\n", ite_dev_descs[model_no].model);
+
+	/* get the description for the device */
+	dev_desc = &ite_dev_descs[model_no];
+
+	/* validate pnp resources */
+	if (!pnp_port_valid(pdev, 0) ||
+	    pnp_port_len(pdev, 0) != dev_desc->io_region_size) {
+		dev_err(&pdev->dev, "IR PNP Port not valid!\n");
+		goto failure;
+	}
+
+	if (!pnp_irq_valid(pdev, 0)) {
+		dev_err(&pdev->dev, "PNP IRQ not valid!\n");
+		goto failure;
+	}
+
+	/* store resource values */
+	itdev->cir_addr = pnp_port_start(pdev, 0);
+	itdev->cir_irq = pnp_irq(pdev, 0);
+
+	/* initialize spinlocks */
+	spin_lock_init(&itdev->lock);
+
+	/* initialize raw event */
+	init_ir_raw_event(&itdev->rawir);
+
+	ret = -EBUSY;
+	/* now claim resources */
+	if (!request_region(itdev->cir_addr,
+				dev_desc->io_region_size, ITE_DRIVER_NAME))
+		goto failure;
+
+	if (request_irq(itdev->cir_irq, ite_cir_isr, IRQF_SHARED,
+			ITE_DRIVER_NAME, (void *)itdev))
+		goto failure;
+
+	/* set driver data into the pnp device */
+	pnp_set_drvdata(pdev, itdev);
+	itdev->pdev = pdev;
+
+	/* initialize waitqueues for transmission */
+	init_waitqueue_head(&itdev->tx_queue);
+	init_waitqueue_head(&itdev->tx_ended);
+
+	/* copy model-specific parameters */
+	itdev->params = *dev_desc;
+
+	/* apply any overrides */
+	if (sample_period > 0)
+		itdev->params.sample_period = sample_period;
+
+	if (tx_carrier_freq > 0)
+		itdev->params.tx_carrier_freq = tx_carrier_freq;
+
+	if (tx_duty_cycle > 0 && tx_duty_cycle <= 100)
+		itdev->params.tx_duty_cycle = tx_duty_cycle;
+
+	if (rx_low_carrier_freq > 0)
+		itdev->params.rx_low_carrier_freq = rx_low_carrier_freq;
+
+	if (rx_high_carrier_freq > 0)
+		itdev->params.rx_high_carrier_freq = rx_high_carrier_freq;
+
+	/* print out parameters */
+	ite_pr(KERN_NOTICE, "TX-capable: %d\n", (int)
+			 itdev->params.hw_tx_capable);
+	ite_pr(KERN_NOTICE, "Sample period (ns): %ld\n", (long)
+		     itdev->params.sample_period);
+	ite_pr(KERN_NOTICE, "TX carrier frequency (Hz): %d\n", (int)
+		     itdev->params.tx_carrier_freq);
+	ite_pr(KERN_NOTICE, "TX duty cycle (%%): %d\n", (int)
+		     itdev->params.tx_duty_cycle);
+	ite_pr(KERN_NOTICE, "RX low carrier frequency (Hz): %d\n", (int)
+		     itdev->params.rx_low_carrier_freq);
+	ite_pr(KERN_NOTICE, "RX high carrier frequency (Hz): %d\n", (int)
+		     itdev->params.rx_high_carrier_freq);
+
+	/* set up hardware initial state */
+	itdev->params.init_hardware(itdev);
+
+	/* set up ir-core props */
+	rdev->priv = itdev;
+	rdev->driver_type = RC_DRIVER_IR_RAW;
+	rdev->allowed_protos = RC_TYPE_ALL;
+	rdev->open = ite_open;
+	rdev->close = ite_close;
+	rdev->s_idle = ite_s_idle;
+	rdev->s_rx_carrier_range = ite_set_rx_carrier_range;
+	rdev->min_timeout = ITE_MIN_IDLE_TIMEOUT;
+	rdev->max_timeout = ITE_MAX_IDLE_TIMEOUT;
+	rdev->timeout = ITE_IDLE_TIMEOUT;
+	rdev->rx_resolution = ITE_BAUDRATE_DIVISOR *
+				itdev->params.sample_period;
+	rdev->tx_resolution = ITE_BAUDRATE_DIVISOR *
+				itdev->params.sample_period;
+
+	/* set up transmitter related values if needed */
+	if (itdev->params.hw_tx_capable) {
+		rdev->tx_ir = ite_tx_ir;
+		rdev->s_tx_carrier = ite_set_tx_carrier;
+		rdev->s_tx_duty_cycle = ite_set_tx_duty_cycle;
+	}
+
+	rdev->input_name = dev_desc->model;
+	rdev->input_id.bustype = BUS_HOST;
+	rdev->input_id.vendor = PCI_VENDOR_ID_ITE;
+	rdev->input_id.product = 0;
+	rdev->input_id.version = 0;
+	rdev->driver_name = ITE_DRIVER_NAME;
+	rdev->map_name = RC_MAP_RC6_MCE;
+
+	ret = rc_register_device(rdev);
+	if (ret)
+		goto failure;
+
+	itdev->rdev = rdev;
+	ite_pr(KERN_NOTICE, "driver has been successfully loaded\n");
+
+	return 0;
+
+failure:
+	if (itdev->cir_irq)
+		free_irq(itdev->cir_irq, itdev);
+
+	if (itdev->cir_addr)
+		release_region(itdev->cir_addr, itdev->params.io_region_size);
+
+	rc_free_device(rdev);
+	kfree(itdev);
+
+	return ret;
+}
+
+static void __devexit ite_remove(struct pnp_dev *pdev)
+{
+	struct ite_dev *dev = pnp_get_drvdata(pdev);
+	unsigned long flags;
+
+	ite_dbg("%s called", __func__);
+
+	spin_lock_irqsave(&dev->lock, flags);
+
+	/* disable hardware */
+	dev->params.disable(dev);
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	/* free resources */
+	free_irq(dev->cir_irq, dev);
+	release_region(dev->cir_addr, dev->params.io_region_size);
+
+	rc_unregister_device(dev->rdev);
+
+	kfree(dev);
+}
+
+static int ite_suspend(struct pnp_dev *pdev, pm_message_t state)
+{
+	struct ite_dev *dev = pnp_get_drvdata(pdev);
+	unsigned long flags;
+
+	ite_dbg("%s called", __func__);
+
+	spin_lock_irqsave(&dev->lock, flags);
+
+	/* disable all interrupts */
+	dev->params.disable(dev);
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return 0;
+}
+
+static int ite_resume(struct pnp_dev *pdev)
+{
+	int ret = 0;
+	struct ite_dev *dev = pnp_get_drvdata(pdev);
+	unsigned long flags;
+
+	ite_dbg("%s called", __func__);
+
+	spin_lock_irqsave(&dev->lock, flags);
+
+	if (dev->transmitting) {
+		/* wake up the transmitter */
+		wake_up_interruptible(&dev->tx_queue);
+	} else {
+		/* enable the receiver */
+		dev->params.enable_rx(dev);
+	}
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+
+	return ret;
+}
+
+static void ite_shutdown(struct pnp_dev *pdev)
+{
+	struct ite_dev *dev = pnp_get_drvdata(pdev);
+	unsigned long flags;
+
+	ite_dbg("%s called", __func__);
+
+	spin_lock_irqsave(&dev->lock, flags);
+
+	/* disable all interrupts */
+	dev->params.disable(dev);
+
+	spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+static struct pnp_driver ite_driver = {
+	.name		= ITE_DRIVER_NAME,
+	.id_table	= ite_ids,
+	.probe		= ite_probe,
+	.remove		= __devexit_p(ite_remove),
+	.suspend	= ite_suspend,
+	.resume		= ite_resume,
+	.shutdown	= ite_shutdown,
+};
+
+int ite_init(void)
+{
+	return pnp_register_driver(&ite_driver);
+}
+
+void ite_exit(void)
+{
+	pnp_unregister_driver(&ite_driver);
+}
+
+MODULE_DEVICE_TABLE(pnp, ite_ids);
+MODULE_DESCRIPTION("ITE Tech Inc. IT8712F/ITE8512F CIR driver");
+
+MODULE_AUTHOR("Juan J. Garcia de Soria <skandalfo@gmail.com>");
+MODULE_LICENSE("GPL");
+
+module_init(ite_init);
+module_exit(ite_exit);