Many fixes for in-kernel decoding + ENE driver

Many fixes for in-kernel decoding + ENE driver

[Maxim Levitsky]

Hi,

I did a lot of debug work on this, including a debug session with two users.
I was able to test and fix support for all features ene driver supports.

The patch #1 fixes a bug I introduced
The patch #2 fixes a nasty bug that crashes the system
The patch #3 fixes another small bug in my code
The patch #4 fixes a nasty but that appears as a stuck down forever key

The patch #5 adds a lot of bugfixes, refactoring and support for latest firmware
that without it driver dosn't work.
Driver is fully tested, and works.

in the patch #6 I finally decided to extend ir_raw_event, and encode additional
flags to it. This way I can signal the decoders about last space and yet not
show it up on lirc interface.
Timeout hangling is now moved in lirc bridge where it belongs.
While at it, I also added support for carrier report events,
and patch #6 adds that support to ene driver (tested too).

Best regards,
	Maxim Levitsky

[PATCH 1/7] IR: plug races in handling threads.

[Maxim Levitsky]

Unfortunelly (my fault) the kernel thread that now handles IR processing
has classical races in regard to wakeup and stop.
This patch hopefully closes them all.
Tested with module reload running in a loop, while receiver is blasted
with IR data for 10 minutes.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ir-core-priv.h |    2 ++
 drivers/media/IR/ir-raw-event.c |   34 +++++++++++++++++++++++++---------
 2 files changed, 27 insertions(+), 9 deletions(-)

diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h
index a85a8c7..761e7f4 100644
--- a/drivers/media/IR/ir-core-priv.h
+++ b/drivers/media/IR/ir-core-priv.h
@@ -17,6 +17,7 @@
 #define _IR_RAW_EVENT
 
 #include <linux/slab.h>
+#include <linux/spinlock.h>
 #include <media/ir-core.h>
 
 struct ir_raw_handler {
@@ -33,6 +34,7 @@ struct ir_raw_handler {
 struct ir_raw_event_ctrl {
 	struct list_head		list;		/* to keep track of raw clients */
 	struct task_struct		*thread;
+	spinlock_t			lock;
 	struct kfifo			kfifo;		/* fifo for the pulse/space durations */
 	ktime_t				last_event;	/* when last event occurred */
 	enum raw_event_type		last_type;	/* last event type */
diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c
index 43094e7..56797be 100644
--- a/drivers/media/IR/ir-raw-event.c
+++ b/drivers/media/IR/ir-raw-event.c
@@ -39,22 +39,34 @@ static int ir_raw_event_thread(void *data)
 	struct ir_raw_event ev;
 	struct ir_raw_handler *handler;
 	struct ir_raw_event_ctrl *raw = (struct ir_raw_event_ctrl *)data;
+	int retval;
 
 	while (!kthread_should_stop()) {
-		try_to_freeze();
 
-		mutex_lock(&ir_raw_handler_lock);
+		spin_lock_irq(&raw->lock);
+		retval = kfifo_out(&raw->kfifo, &ev, sizeof(ev));
+
+		if (!retval) {
+			set_current_state(TASK_INTERRUPTIBLE);
 
-		while (kfifo_out(&raw->kfifo, &ev, sizeof(ev)) == sizeof(ev)) {
-			list_for_each_entry(handler, &ir_raw_handler_list, list)
-				handler->decode(raw->input_dev, ev);
-			raw->prev_ev = ev;
+			if (kthread_should_stop())
+				set_current_state(TASK_RUNNING);
+
+			spin_unlock_irq(&raw->lock);
+			schedule();
+			continue;
 		}
 
-		mutex_unlock(&ir_raw_handler_lock);
+		spin_unlock_irq(&raw->lock);
 
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule();
+
+		BUG_ON(retval != sizeof(ev));
+
+		mutex_lock(&ir_raw_handler_lock);
+		list_for_each_entry(handler, &ir_raw_handler_list, list)
+			handler->decode(raw->input_dev, ev);
+		raw->prev_ev = ev;
+		mutex_unlock(&ir_raw_handler_lock);
 	}
 
 	return 0;
@@ -232,11 +244,14 @@ EXPORT_SYMBOL_GPL(ir_raw_event_set_idle);
 void ir_raw_event_handle(struct input_dev *input_dev)
 {
 	struct ir_input_dev *ir = input_get_drvdata(input_dev);
+	unsigned long flags;
 
 	if (!ir->raw)
 		return;
 
+	spin_lock_irqsave(&ir->raw->lock, flags);
 	wake_up_process(ir->raw->thread);
+	spin_unlock_irqrestore(&ir->raw->lock, flags);
 }
 EXPORT_SYMBOL_GPL(ir_raw_event_handle);
 
@@ -275,6 +290,7 @@ int ir_raw_event_register(struct input_dev *input_dev)
 		return rc;
 	}
 
+	spin_lock_init(&ir->raw->lock);
 	ir->raw->thread = kthread_run(ir_raw_event_thread, ir->raw,
 			"rc%u",  (unsigned int)ir->devno);
 
-- 
1.7.0.4

[PATCH 2/7] IR: make sure we register input device when it safe to do so.

[Maxim Levitsky]

As soon as input device is registered, it might be accessed (and it is)
This can trigger hardware interrupts for example that in turn
can access not yet initialized ir->raw.
Can be reproduced by holding down a remote button and reloading the module.
And always crashes the systems where hardware decides to send and interrupt
right at the moment it is enabled.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ir-core-priv.h |    1 +
 drivers/media/IR/ir-keytable.c  |    2 ++
 drivers/media/IR/ir-sysfs.c     |   27 +++++++++++++++++----------
 3 files changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h
index 761e7f4..5d7e08f 100644
--- a/drivers/media/IR/ir-core-priv.h
+++ b/drivers/media/IR/ir-core-priv.h
@@ -116,6 +116,7 @@ static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
  * Routines from ir-sysfs.c - Meant to be called only internally inside
  * ir-core
  */
+int ir_register_input(struct input_dev *input_dev);
 
 int ir_register_class(struct input_dev *input_dev);
 void ir_unregister_class(struct input_dev *input_dev);
diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c
index 7e82a9d..3f0dd80 100644
--- a/drivers/media/IR/ir-keytable.c
+++ b/drivers/media/IR/ir-keytable.c
@@ -505,6 +505,8 @@ int __ir_input_register(struct input_dev *input_dev,
 				goto out_event;
 		}
 
+	rc = ir_register_input(input_dev);
+
 	IR_dprintk(1, "Registered input device on %s for %s remote%s.\n",
 		   driver_name, rc_tab->name,
 		   (ir_dev->props && ir_dev->props->driver_type == RC_DRIVER_IR_RAW) ?
diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c
index 96dafc4..c0075f1 100644
--- a/drivers/media/IR/ir-sysfs.c
+++ b/drivers/media/IR/ir-sysfs.c
@@ -251,8 +251,6 @@ static struct device_type rc_dev_type = {
  */
 int ir_register_class(struct input_dev *input_dev)
 {
-	int rc;
-	const char *path;
 	struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
 	int devno = find_first_zero_bit(&ir_core_dev_number,
 					IRRCV_NUM_DEVICES);
@@ -261,17 +259,28 @@ int ir_register_class(struct input_dev *input_dev)
 		return devno;
 
 	ir_dev->dev.type = &rc_dev_type;
+	ir_dev->devno = devno;
 
 	ir_dev->dev.class = &ir_input_class;
 	ir_dev->dev.parent = input_dev->dev.parent;
+	input_dev->dev.parent = &ir_dev->dev;
 	dev_set_name(&ir_dev->dev, "rc%d", devno);
 	dev_set_drvdata(&ir_dev->dev, ir_dev);
-	rc = device_register(&ir_dev->dev);
-	if (rc)
-		return rc;
+	return  device_register(&ir_dev->dev);
+};
+
+/**
+ * ir_register_input - registers ir input device with input subsystem
+ * @input_dev:	the struct input_dev descriptor of the device
+ */
+
+int ir_register_input(struct input_dev *input_dev)
+{
+	struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+	int rc;
+	const char *path;
 
 
-	input_dev->dev.parent = &ir_dev->dev;
 	rc = input_register_device(input_dev);
 	if (rc < 0) {
 		device_del(&ir_dev->dev);
@@ -287,11 +296,9 @@ int ir_register_class(struct input_dev *input_dev)
 		path ? path : "N/A");
 	kfree(path);
 
-	ir_dev->devno = devno;
-	set_bit(devno, &ir_core_dev_number);
-
+	set_bit(ir_dev->devno, &ir_core_dev_number);
 	return 0;
-};
+}
 
 /**
  * ir_unregister_class() - removes the sysfs for sysfs for
-- 
1.7.0.4

[PATCH 3/7] IR: fix duty cycle capability

[Maxim Levitsky]

Due to typo lirc bridge enabled wrong capability.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ir-lirc-codec.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/IR/ir-lirc-codec.c b/drivers/media/IR/ir-lirc-codec.c
index 77b5946..e63f757 100644
--- a/drivers/media/IR/ir-lirc-codec.c
+++ b/drivers/media/IR/ir-lirc-codec.c
@@ -267,7 +267,7 @@ static int ir_lirc_register(struct input_dev *input_dev)
 			features |= LIRC_CAN_SET_SEND_CARRIER;
 
 		if (ir_dev->props->s_tx_duty_cycle)
-			features |= LIRC_CAN_SET_REC_DUTY_CYCLE;
+			features |= LIRC_CAN_SET_SEND_DUTY_CYCLE;
 	}
 
 	if (ir_dev->props->s_rx_carrier_range)
-- 
1.7.0.4

[PATCH 4/7] IR: fix keys beeing stuck down forever.

[Maxim Levitsky]

The logic in ir_timer_keyup was inverted.

In case that values aren't equal,
the meaning of the time_is_after_eq_jiffies(ir->keyup_jiffies) is that
ir->keyup_jiffies is after the the jiffies or equally that
that jiffies are before the the ir->keyup_jiffies which is
exactly the situation we want to avoid (that the timeout is in the future)
Confusing Eh?

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ir-keytable.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c
index 3f0dd80..b5addb8 100644
--- a/drivers/media/IR/ir-keytable.c
+++ b/drivers/media/IR/ir-keytable.c
@@ -319,7 +319,7 @@ static void ir_timer_keyup(unsigned long cookie)
 	 * a keyup event might follow immediately after the keydown.
 	 */
 	spin_lock_irqsave(&ir->keylock, flags);
-	if (time_is_after_eq_jiffies(ir->keyup_jiffies))
+	if (time_is_before_eq_jiffies(ir->keyup_jiffies))
 		ir_keyup(ir);
 	spin_unlock_irqrestore(&ir->keylock, flags);
 }
-- 
1.7.0.4

[PATCH 5/7] ene_ir: updates

[Maxim Levitsky]

* Add support for newer firmware versions with different
buffer format. Makes hardware work for many users

* Register name updates + refactoring

* Lots of fixes as a result of full testing


Every feature of the driver is now well tested.

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ene_ir.c |  795 +++++++++++++++++++++++++++------------------
 drivers/media/IR/ene_ir.h |  223 ++++++++-----
 2 files changed, 618 insertions(+), 400 deletions(-)

diff --git a/drivers/media/IR/ene_ir.c b/drivers/media/IR/ene_ir.c
index 5447750..8e3e0c8 100644
--- a/drivers/media/IR/ene_ir.c
+++ b/drivers/media/IR/ene_ir.c
@@ -1,5 +1,5 @@
 /*
- * driver for ENE KB3926 B/C/D CIR (pnp id: ENE0XXX)
+ * driver for ENE KB3926 B/C/D/E/F CIR (pnp id: ENE0XXX)
  *
  * Copyright (C) 2010 Maxim Levitsky <maximlevitsky@gmail.com>
  *
@@ -17,6 +17,17 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  * USA
+ *
+ * Special thanks to:
+ *   Sami R. <maesesami@gmail.com> for lot of help in debbuging and therefore
+ *    bringing to life suppport for transmition & learning mode.
+ *
+ *   Charlie Andrews <charliethepilot@googlemail.com> for lots of help in
+ *   bringing up the support of new firmware buffer that is popular
+ *   on latest notebooks
+ *
+ *   ENE for partial device documentation
+ *
  */
 
 #include <linux/kernel.h>
@@ -33,49 +44,49 @@
 
 
 static int sample_period = -1;
-static int enable_idle = 1;
-static int input = 1;
+static bool enable_idle = true;
+static bool learning_mode;
 static int debug;
-static int txsim;
+static bool txsim;
 
-static int ene_irq_status(struct ene_device *dev);
+static void ene_set_reg_addr(struct ene_device *dev, u16 reg)
+{
+	outb(reg >> 8, dev->hw_io + ENE_ADDR_HI);
+	outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO);
+}
 
 /* read a hardware register */
-static u8 ene_hw_read_reg(struct ene_device *dev, u16 reg)
+static u8 ene_read_reg(struct ene_device *dev, u16 reg)
 {
 	u8 retval;
-	outb(reg >> 8, dev->hw_io + ENE_ADDR_HI);
-	outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO);
+	ene_set_reg_addr(dev, reg);
 	retval = inb(dev->hw_io + ENE_IO);
-
-	ene_dbg_verbose("reg %04x == %02x", reg, retval);
+	dbg_regs("reg %04x == %02x", reg, retval);
 	return retval;
 }
 
 /* write a hardware register */
-static void ene_hw_write_reg(struct ene_device *dev, u16 reg, u8 value)
+static void ene_write_reg(struct ene_device *dev, u16 reg, u8 value)
 {
-	outb(reg >> 8, dev->hw_io + ENE_ADDR_HI);
-	outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO);
+	dbg_regs("reg %04x <- %02x", reg, value);
+	ene_set_reg_addr(dev, reg);
 	outb(value, dev->hw_io + ENE_IO);
-
-	ene_dbg_verbose("reg %04x <- %02x", reg, value);
 }
 
-/* change specific bits in hardware register */
-static void ene_hw_write_reg_mask(struct ene_device *dev,
-				  u16 reg, u8 value, u8 mask)
+/* Set bits in hardware register */
+static void ene_set_reg_mask(struct ene_device *dev, u16 reg, u8 mask)
 {
-	u8 regvalue;
-
-	outb(reg >> 8, dev->hw_io + ENE_ADDR_HI);
-	outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO);
-
-	regvalue = inb(dev->hw_io + ENE_IO) & ~mask;
-	regvalue |= (value & mask);
-	outb(regvalue, dev->hw_io + ENE_IO);
+	dbg_regs("reg %04x |= %02x", reg, mask);
+	ene_set_reg_addr(dev, reg);
+	outb(inb(dev->hw_io + ENE_IO) | mask, dev->hw_io + ENE_IO);
+}
 
-	ene_dbg_verbose("reg %04x <- %02x (mask=%02x)", reg, value, mask);
+/* Clear bits in hardware register */
+static void ene_clear_reg_mask(struct ene_device *dev, u16 reg, u8 mask)
+{
+	dbg_regs("reg %04x &= ~%02x ", reg, mask);
+	ene_set_reg_addr(dev, reg);
+	outb(inb(dev->hw_io + ENE_IO) & ~mask, dev->hw_io + ENE_IO);
 }
 
 /* detect hardware features */
@@ -83,22 +94,19 @@ static int ene_hw_detect(struct ene_device *dev)
 {
 	u8 chip_major, chip_minor;
 	u8 hw_revision, old_ver;
-	u8 tmp;
-	u8 fw_capabilities;
+	u8 fw_reg2, fw_reg1;
 	int pll_freq;
 
-	tmp = ene_hw_read_reg(dev, ENE_HW_UNK);
-	ene_hw_write_reg(dev, ENE_HW_UNK, tmp & ~ENE_HW_UNK_CLR);
-
-	chip_major = ene_hw_read_reg(dev, ENE_HW_VER_MAJOR);
-	chip_minor = ene_hw_read_reg(dev, ENE_HW_VER_MINOR);
+	ene_clear_reg_mask(dev, ENE_HW_UNK, ENE_HW_UNK_CLR);
+	chip_major = ene_read_reg(dev, ENE_HW_VER_MAJOR);
+	chip_minor = ene_read_reg(dev, ENE_HW_VER_MINOR);
+	ene_set_reg_mask(dev, ENE_HW_UNK, ENE_HW_UNK_CLR);
 
-	ene_hw_write_reg(dev, ENE_HW_UNK, tmp);
-	hw_revision = ene_hw_read_reg(dev, ENE_HW_VERSION);
-	old_ver = ene_hw_read_reg(dev, ENE_HW_VER_OLD);
+	hw_revision = ene_read_reg(dev, ENE_HW_VERSION);
+	old_ver = ene_read_reg(dev, ENE_HW_VER_OLD);
 
-	pll_freq = (ene_hw_read_reg(dev, ENE_PLLFRH) << 4) +
-		(ene_hw_read_reg(dev, ENE_PLLFRL) >> 4);
+	pll_freq = (ene_read_reg(dev, ENE_PLLFRH) << 4) +
+		(ene_read_reg(dev, ENE_PLLFRL) >> 4);
 
 	if (pll_freq != 1000)
 		dev->rx_period_adjust = 4;
@@ -106,19 +114,18 @@ static int ene_hw_detect(struct ene_device *dev)
 		dev->rx_period_adjust = 2;
 
 
-	ene_printk(KERN_NOTICE, "PLL freq = %d\n", pll_freq);
+	ene_notice("PLL freq = %d", pll_freq);
 
 	if (hw_revision == 0xFF) {
 
-		ene_printk(KERN_WARNING, "device seems to be disabled\n");
-		ene_printk(KERN_WARNING,
-			"send a mail to lirc-list@lists.sourceforge.net\n");
-		ene_printk(KERN_WARNING, "please attach output of acpidump\n");
+		ene_warn("device seems to be disabled");
+		ene_warn("send a mail to lirc-list@lists.sourceforge.net");
+		ene_warn("please attach output of acpidump");
 		return -ENODEV;
 	}
 
 	if (chip_major == 0x33) {
-		ene_printk(KERN_WARNING, "chips 0x33xx aren't supported\n");
+		ene_warn("chips 0x33xx aren't supported");
 		return -ENODEV;
 	}
 
@@ -126,96 +133,118 @@ static int ene_hw_detect(struct ene_device *dev)
 		dev->hw_revision = ENE_HW_C;
 	} else if (old_ver == 0x24 && hw_revision == 0xC0) {
 		dev->hw_revision = ENE_HW_B;
-		ene_printk(KERN_NOTICE, "KB3926B detected\n");
+		ene_notice("KB3926B detected");
 	} else {
 		dev->hw_revision = ENE_HW_D;
-		ene_printk(KERN_WARNING,
-			"unknown ENE chip detected, assuming KB3926D\n");
-		ene_printk(KERN_WARNING,
-			"driver support might be not complete");
-
+		ene_notice("KB3926D or higher detected");
 	}
 
-	ene_printk(KERN_DEBUG,
-		"chip is 0x%02x%02x - kbver = 0x%02x, rev = 0x%02x\n",
-			chip_major, chip_minor, old_ver, hw_revision);
+	ene_notice("chip is 0x%02x%02x - kbver = 0x%02x, rev = 0x%02x",
+		chip_major, chip_minor, old_ver, hw_revision);
 
 	/* detect features hardware supports */
 	if (dev->hw_revision < ENE_HW_C)
 		return 0;
 
-	fw_capabilities = ene_hw_read_reg(dev, ENE_FW2);
-	ene_dbg("Firmware capabilities: %02x", fw_capabilities);
+	fw_reg1 = ene_read_reg(dev, ENE_FW1);
+	fw_reg2 = ene_read_reg(dev, ENE_FW2);
 
-	dev->hw_gpio40_learning = fw_capabilities & ENE_FW2_GP40_AS_LEARN;
-	dev->hw_learning_and_tx_capable = fw_capabilities & ENE_FW2_LEARNING;
+	ene_notice("Firmware regs: %02x %02x", fw_reg1, fw_reg2);
 
-	dev->hw_fan_as_normal_input = dev->hw_learning_and_tx_capable &&
-	    (fw_capabilities & ENE_FW2_FAN_AS_NRML_IN);
+	dev->hw_use_gpio_0a = fw_reg2 & ENE_FW2_GP0A;
+	dev->hw_learning_and_tx_capable = fw_reg2 & ENE_FW2_LEARNING;
+	dev->hw_extra_buffer = fw_reg1 & ENE_FW1_HAS_EXTRA_BUF;
+	dev->hw_fan_input = dev->hw_learning_and_tx_capable &&
+	    (fw_reg2 & ENE_FW2_FAN_INPUT);
 
-	ene_printk(KERN_NOTICE, "hardware features:\n");
-	ene_printk(KERN_NOTICE,
-		"learning and transmit %s, gpio40_learn %s, fan_in %s\n",
-	       dev->hw_learning_and_tx_capable ? "on" : "off",
-	       dev->hw_gpio40_learning ? "on" : "off",
-	       dev->hw_fan_as_normal_input ? "on" : "off");
+	ene_notice("Hardware features:");
 
 	if (dev->hw_learning_and_tx_capable) {
-		ene_printk(KERN_WARNING,
-		"Device supports transmitting, but that support is\n");
-		ene_printk(KERN_WARNING,
-		"lightly tested. Please test it and mail\n");
-		ene_printk(KERN_WARNING,
-		"lirc-list@lists.sourceforge.net\n");
+		ene_notice("* Supports transmitting & learning mode");
+		ene_notice("   NOTE: driver support isn't well tested.");
+		ene_notice("   You are welcome to test it,");
+		ene_notice("   and mail results to: ");
+		ene_notice("   lirc-list@lists.sourceforge.net");
+		ene_notice("   or maximlevitsky@gmail.com");
+
+		ene_notice("* Uses GPIO %s for IR raw input",
+			dev->hw_use_gpio_0a ? "40" : "0A");
+
+		if (dev->hw_fan_input)
+			ene_notice("* Uses unused fan feedback input as source"
+					" of demodulated IR data");
 	}
+
+	if (!dev->hw_fan_input)
+		ene_notice("* Uses GPIO %s for IR demodulated input",
+			dev->hw_use_gpio_0a ? "0A" : "40");
+
+	if (dev->hw_extra_buffer)
+		ene_notice("* Uses new style input buffer");
 	return 0;
 }
 
-/* this enables/disables IR input via gpio40*/
-static void ene_enable_gpio40_receive(struct ene_device *dev, int enable)
+/* this enables/disables the CIR RX engine */
+static void ene_enable_cir_engine(struct ene_device *dev, bool enable)
 {
-	ene_hw_write_reg_mask(dev, ENE_CIR_CONF2, enable ?
-			      0 : ENE_CIR_CONF2_GPIO40DIS,
-			      ENE_CIR_CONF2_GPIO40DIS);
+	if (enable)
+		ene_set_reg_mask(dev, ENE_CIRCFG,
+					ENE_CIRCFG_RX_EN | ENE_CIRCFG_RX_IRQ);
+	else
+		ene_clear_reg_mask(dev, ENE_CIRCFG,
+					ENE_CIRCFG_RX_EN | ENE_CIRCFG_RX_IRQ);
 }
 
-/* this enables/disables IR via standard input */
-static void ene_enable_normal_receive(struct ene_device *dev, int enable)
+/* this selects input for CIR engine. Ether GPIO 0A or GPIO40*/
+static void ene_select_rx_input(struct ene_device *dev, bool use_gpio_0a)
 {
-	ene_hw_write_reg(dev, ENE_CIR_CONF1, enable ? ENE_CIR_CONF1_RX_ON : 0);
+	if (use_gpio_0a)
+		ene_set_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_GPIO0A);
+	else
+		ene_clear_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_GPIO0A);
 }
 
-/* this enables/disables IR input via unused fan tachtometer input */
-static void ene_enable_fan_receive(struct ene_device *dev, int enable)
+/*
+ * this enables alternative input via fan tachtometer sensor and bypasses
+ * the hw CIR engine
+ */
+static void ene_enable_fan_input(struct ene_device *dev, bool enable)
 {
 	if (!enable)
-		ene_hw_write_reg(dev, ENE_FAN_AS_IN1, 0);
+		ene_write_reg(dev, ENE_FAN_AS_IN1, 0);
 	else {
-		ene_hw_write_reg(dev, ENE_FAN_AS_IN1, ENE_FAN_AS_IN1_EN);
-		ene_hw_write_reg(dev, ENE_FAN_AS_IN2, ENE_FAN_AS_IN2_EN);
+		ene_write_reg(dev, ENE_FAN_AS_IN1, ENE_FAN_AS_IN1_EN);
+		ene_write_reg(dev, ENE_FAN_AS_IN2, ENE_FAN_AS_IN2_EN);
 	}
 	dev->rx_fan_input_inuse = enable;
 }
 
-
 /* Sense current received carrier */
-static int ene_rx_sense_carrier(struct ene_device *dev)
+void ene_rx_sense_carrier(struct ene_device *dev)
 {
-	int period = ene_hw_read_reg(dev, ENE_RX_CARRIER);
-	int carrier;
-	ene_dbg("RX: hardware carrier period = %02x", period);
+	int period = ene_read_reg(dev, ENE_CIRCAR_PRD);
+	int hperiod = ene_read_reg(dev, ENE_CIRCAR_HPRD);
+	int carrier, duty_cycle;
 
-	if (!(period & ENE_RX_CARRIER_VALID))
-		return 0;
 
-	period &= ~ENE_RX_CARRIER_VALID;
+	if (!(period & ENE_CIRCAR_PRD_VALID))
+		return;
+
+	period &= ~ENE_CIRCAR_PRD_VALID;
 
 	if (!period)
-		return 0;
+		return;
+
+	dbg("RX: hardware carrier period = %02x", period);
+	dbg("RX: hardware carrier pulse period = %02x", hperiod);
+
 
 	carrier = 2000000 / period;
-	ene_dbg("RX: sensed carrier = %d Hz", carrier);
-	return carrier;
+	duty_cycle = (hperiod * 100) / period;
+	dbg("RX: sensed carrier = %d Hz, duty cycle %d%%",
+							carrier, duty_cycle);
+
+	/* TODO: Send carrier & duty cycle to IR layer */
 }
 
 /* determine which input to use*/
@@ -223,44 +252,57 @@ static void ene_rx_set_inputs(struct ene_device *dev)
 {
 	int learning_mode = dev->learning_enabled;
 
-	ene_dbg("RX: setup receiver, learning mode = %d", learning_mode);
-
-	ene_enable_normal_receive(dev, 1);
+	dbg("RX: setup receiver, learning mode = %d", learning_mode);
 
-	/* old hardware doesn't support learning mode for sure */
-	if (dev->hw_revision <= ENE_HW_B)
+	/* old hardware doesn't support this */
+	if (dev->hw_revision <= ENE_HW_B) {
+		ene_enable_cir_engine(dev, true);
 		return;
+	}
 
-	/* receiver not learning capable, still set gpio40 correctly */
 	if (!dev->hw_learning_and_tx_capable) {
-		ene_enable_gpio40_receive(dev, !dev->hw_gpio40_learning);
+		ene_enable_cir_engine(dev, true);
+		ene_select_rx_input(dev, dev->hw_use_gpio_0a);
 		return;
 	}
 
 	/* enable learning mode */
 	if (learning_mode) {
-		ene_enable_gpio40_receive(dev, dev->hw_gpio40_learning);
 
-		/* fan input is not used for learning */
-		if (dev->hw_fan_as_normal_input)
-			ene_enable_fan_receive(dev, 0);
+		/* Disable the fan hack */
+		if (dev->hw_fan_input)
+			ene_enable_fan_input(dev, 0);
+
+		/* Enable the opposite to normal input
+		That means that if GPIO40 is normally used, use GPIO0A
+		and vice versa
+		This means that this input will carry non demodulated
+		signal, and hw will demodulate it on its own */
+		ene_enable_cir_engine(dev, true);
+		ene_select_rx_input(dev, !dev->hw_use_gpio_0a);
+
+		/* Enable carrier detection & demodulation */
+		ene_set_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD);
+		ene_set_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_CARR_DETECT);
+
 
 	/* disable learning mode */
 	} else {
-		if (dev->hw_fan_as_normal_input) {
-			ene_enable_fan_receive(dev, 1);
-			ene_enable_normal_receive(dev, 0);
-		} else
-			ene_enable_gpio40_receive(dev,
-					!dev->hw_gpio40_learning);
-	}
 
-	/* set few additional settings for this mode */
-	ene_hw_write_reg_mask(dev, ENE_CIR_CONF1, learning_mode ?
-			      ENE_CIR_CONF1_LEARN1 : 0, ENE_CIR_CONF1_LEARN1);
+		/* Enable the fan hack if used */
+		if (dev->hw_fan_input) {
+			ene_enable_cir_engine(dev, false);
+			ene_enable_fan_input(dev, true);
+		} else {
+			ene_enable_cir_engine(dev, true);
+			ene_select_rx_input(dev, dev->hw_use_gpio_0a);
+		}
 
-	ene_hw_write_reg_mask(dev, ENE_CIR_CONF2, learning_mode ?
-			      ENE_CIR_CONF2_LEARN2 : 0, ENE_CIR_CONF2_LEARN2);
+		/* Disable carrier detection & demodulation */
+		ene_clear_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD);
+		ene_clear_reg_mask(dev, ENE_CIRCFG2,
+						ENE_CIRCFG2_CARR_DETECT);
+	}
 
 	if (dev->rx_fan_input_inuse) {
 		dev->props->rx_resolution = ENE_SAMPLE_PERIOD_FAN * 1000;
@@ -278,34 +320,35 @@ static void ene_rx_enable(struct ene_device *dev)
 {
 	u8 reg_value;
 
+	/* Enable system interrupt */
 	if (dev->hw_revision < ENE_HW_C) {
-		ene_hw_write_reg(dev, ENEB_IRQ, dev->irq << 1);
-		ene_hw_write_reg(dev, ENEB_IRQ_UNK1, 0x01);
+		ene_write_reg(dev, ENEB_IRQ, dev->irq << 1);
+		ene_write_reg(dev, ENEB_IRQ_UNK1, 0x01);
 	} else {
-		reg_value = ene_hw_read_reg(dev, ENEC_IRQ) & 0xF0;
+		reg_value = ene_read_reg(dev, ENEC_IRQ) & 0xF0;
 		reg_value |= ENEC_IRQ_UNK_EN;
 		reg_value &= ~ENEC_IRQ_STATUS;
 		reg_value |= (dev->irq & ENEC_IRQ_MASK);
-		ene_hw_write_reg(dev, ENEC_IRQ, reg_value);
-		ene_hw_write_reg(dev, ENE_TX_UNK1, 0x63);
+		ene_write_reg(dev, ENEC_IRQ, reg_value);
 	}
 
-	ene_hw_write_reg(dev, ENE_CIR_CONF2, 0x00);
+	if (dev->hw_revision >= ENE_HW_C)
+		ene_write_reg(dev, ENE_CIRCAR_PULS, 0x63);
+
+	ene_write_reg(dev, ENE_CIRCFG2, 0x00);
 	ene_rx_set_inputs(dev);
 
-	/* set sampling period */
-	ene_hw_write_reg(dev, ENE_CIR_SAMPLE_PERIOD, sample_period);
+	/* set sample period*/
+	ene_write_reg(dev, ENE_CIRRLC_CFG, sample_period);
 
 	/* ack any pending irqs - just in case */
 	ene_irq_status(dev);
 
 	/* enable firmware bits */
-	ene_hw_write_reg_mask(dev, ENE_FW1,
-			      ENE_FW1_ENABLE | ENE_FW1_IRQ,
-			      ENE_FW1_ENABLE | ENE_FW1_IRQ);
+	ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_ENABLE | ENE_FW1_IRQ);
 
-	/* enter idle mode */
-	ir_raw_event_set_idle(dev->idev, 1);
+	/* enter idle mode on revB*/
+	ir_raw_event_set_idle(dev->idev, true);
 	ir_raw_event_reset(dev->idev);
 
 }
@@ -314,15 +357,15 @@ static void ene_rx_enable(struct ene_device *dev)
 static void ene_rx_disable(struct ene_device *dev)
 {
 	/* disable inputs */
-	ene_enable_normal_receive(dev, 0);
+	ene_enable_cir_engine(dev, false);
 
-	if (dev->hw_fan_as_normal_input)
-		ene_enable_fan_receive(dev, 0);
+	if (dev->hw_fan_input)
+		ene_enable_fan_input(dev, false);
 
 	/* disable hardware IRQ and firmware flag */
-	ene_hw_write_reg_mask(dev, ENE_FW1, 0, ENE_FW1_ENABLE | ENE_FW1_IRQ);
+	ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_ENABLE | ENE_FW1_IRQ);
 
-	ir_raw_event_set_idle(dev->idev, 1);
+	ir_raw_event_set_idle(dev->idev, true);
 	ir_raw_event_reset(dev->idev);
 }
 
@@ -330,60 +373,65 @@ static void ene_rx_disable(struct ene_device *dev)
 /* prepare transmission */
 static void ene_tx_prepare(struct ene_device *dev)
 {
-	u8 conf1;
+	u8 conf1 = ene_read_reg(dev, ENE_CIRCFG);
+	u8 fwreg2 = ene_read_reg(dev, ENE_FW2);
 
-	conf1 = ene_hw_read_reg(dev, ENE_CIR_CONF1);
 	dev->saved_conf1 = conf1;
 
+	/* revC doesn't support both full duplex mode */
 	if (dev->hw_revision == ENE_HW_C)
-		conf1 &= ~ENE_CIR_CONF1_TX_CLEAR;
+		conf1 &= ~ENE_CIRCFG_RX_EN;
 
 	/* Enable TX engine */
-	conf1 |= ENE_CIR_CONF1_TX_ON;
+	conf1 |= ENE_CIRCFG_TX_EN | ENE_CIRCFG_TX_IRQ;
+
+
+	/* Show information about currently connected transmitter jacks */
+	if (fwreg2 & ENE_FW2_EMMITER1_CONN)
+		dbg("TX: Transmitter #1 is connected");
+
+	if (fwreg2 & ENE_FW2_EMMITER2_CONN)
+		dbg("TX: Transmitter #2 is connected");
+
+	if (!(fwreg2 & (ENE_FW2_EMMITER1_CONN | ENE_FW2_EMMITER2_CONN)))
+		ene_warn("TX: transmitter cable isn't connected!");
 
 	/* Set carrier */
 	if (dev->tx_period) {
 
-		/* NOTE: duty cycle handling is just a guess, it might
-			not be aviable. Default values were tested */
-		int tx_period_in500ns = dev->tx_period * 2;
-
-		int tx_pulse_width_in_500ns =
-			tx_period_in500ns / (100 / dev->tx_duty_cycle);
+		int tx_puls_width = dev->tx_period / (100 / dev->tx_duty_cycle);
 
-		if (!tx_pulse_width_in_500ns)
-			tx_pulse_width_in_500ns = 1;
+		if (!tx_puls_width)
+			tx_puls_width = 1;
 
-		ene_dbg("TX: pulse distance = %d * 500 ns", tx_period_in500ns);
-		ene_dbg("TX: pulse width = %d * 500 ns",
-						tx_pulse_width_in_500ns);
+		dbg("TX: pulse distance = %d * 500 ns", dev->tx_period);
+		dbg("TX: pulse width = %d * 500 ns", tx_puls_width);
 
-		ene_hw_write_reg(dev, ENE_TX_PERIOD, ENE_TX_PERIOD_UNKBIT |
-					tx_period_in500ns);
+		ene_write_reg(dev, ENE_CIRMOD_PRD, ENE_CIRMOD_PRD_POL |
+					dev->tx_period);
 
-		ene_hw_write_reg(dev, ENE_TX_PERIOD_PULSE,
-					tx_pulse_width_in_500ns);
+		ene_write_reg(dev, ENE_CIRMOD_HPRD, tx_puls_width);
 
-		conf1 |= ENE_CIR_CONF1_TX_CARR;
+		conf1 |= ENE_CIRCFG_TX_CARR;
 	} else
-		conf1 &= ~ENE_CIR_CONF1_TX_CARR;
+		conf1 &= ~ENE_CIRCFG_TX_CARR;
 
-	ene_hw_write_reg(dev, ENE_CIR_CONF1, conf1);
+	ene_write_reg(dev, ENE_CIRCFG, conf1);
 
 }
 
 /* end transmission */
 static void ene_tx_complete(struct ene_device *dev)
 {
-	ene_hw_write_reg(dev, ENE_CIR_CONF1, dev->saved_conf1);
+	ene_write_reg(dev, ENE_CIRCFG, dev->saved_conf1);
 	dev->tx_buffer = NULL;
 }
 
 /* set transmit mask */
 static void ene_tx_hw_set_transmiter_mask(struct ene_device *dev)
 {
-	u8 txport1 = ene_hw_read_reg(dev, ENE_TX_PORT1) & ~ENE_TX_PORT1_EN;
-	u8 txport2 = ene_hw_read_reg(dev, ENE_TX_PORT2) & ~ENE_TX_PORT2_EN;
+	u8 txport1 = ene_read_reg(dev, ENE_TX_PORT1) & ~ENE_TX_PORT1_EN;
+	u8 txport2 = ene_read_reg(dev, ENE_TX_PORT2) & ~ENE_TX_PORT2_EN;
 
 	if (dev->transmitter_mask & 0x01)
 		txport1 |= ENE_TX_PORT1_EN;
@@ -391,8 +439,8 @@ static void ene_tx_hw_set_transmiter_mask(struct ene_device *dev)
 	if (dev->transmitter_mask & 0x02)
 		txport2 |= ENE_TX_PORT2_EN;
 
-	ene_hw_write_reg(dev, ENE_TX_PORT1, txport1);
-	ene_hw_write_reg(dev, ENE_TX_PORT2, txport2);
+	ene_write_reg(dev, ENE_TX_PORT1, txport1);
+	ene_write_reg(dev, ENE_TX_PORT2, txport2);
 }
 
 /* TX one sample - must be called with dev->hw_lock*/
@@ -400,22 +448,23 @@ static void ene_tx_sample(struct ene_device *dev)
 {
 	u8 raw_tx;
 	u32 sample;
+	bool pulse = dev->tx_sample_pulse;
 
 	if (!dev->tx_buffer) {
-		ene_dbg("TX: attempt to transmit NULL buffer");
+		ene_warn("TX: attempt to transmit NULL buffer");
 		return;
 	}
 
 	/* Grab next TX sample */
 	if (!dev->tx_sample) {
-again:
-		if (dev->tx_pos == dev->tx_len + 1) {
+
+		if (dev->tx_pos == dev->tx_len) {
 			if (!dev->tx_done) {
-				ene_dbg("TX: no more data to send");
-				dev->tx_done = 1;
+				dbg("TX: no more data to send");
+				dev->tx_done = true;
 				goto exit;
 			} else {
-				ene_dbg("TX: last sample sent by hardware");
+				dbg("TX: last sample sent by hardware");
 				ene_tx_complete(dev);
 				complete(&dev->tx_complete);
 				return;
@@ -425,23 +474,21 @@ again:
 		sample = dev->tx_buffer[dev->tx_pos++];
 		dev->tx_sample_pulse = !dev->tx_sample_pulse;
 
-		ene_dbg("TX: sample %8d (%s)", sample, dev->tx_sample_pulse ?
+		dbg("TX: sample %8d (%s)", sample, dev->tx_sample_pulse ?
 							"pulse" : "space");
+		dev->tx_sample = DIV_ROUND_CLOSEST(sample, sample_period);
 
-		dev->tx_sample = DIV_ROUND_CLOSEST(sample, ENE_TX_SMPL_PERIOD);
-
-		/* guard against too short samples */
 		if (!dev->tx_sample)
-			goto again;
+			dev->tx_sample = 1;
 	}
 
-	raw_tx = min(dev->tx_sample , (unsigned int)ENE_TX_SMLP_MASK);
+	raw_tx = min(dev->tx_sample , (unsigned int)ENE_CIRRLC_OUT_MASK);
 	dev->tx_sample -= raw_tx;
 
-	if (dev->tx_sample_pulse)
-		raw_tx |= ENE_TX_PULSE_MASK;
+	if (pulse)
+		raw_tx |= ENE_CIRRLC_OUT_PULSE;
 
-	ene_hw_write_reg(dev, ENE_TX_INPUT1 + dev->tx_reg, raw_tx);
+	ene_write_reg(dev, ENE_CIRRLC_OUT0 + dev->tx_reg, raw_tx);
 	dev->tx_reg = !dev->tx_reg;
 exit:
 	/* simulate TX done interrupt */
@@ -460,82 +507,204 @@ static void ene_tx_irqsim(unsigned long data)
 	spin_unlock_irqrestore(&dev->hw_lock, flags);
 }
 
+/* Read properities of hw sample buffer */
+static void ene_setup_hw_buffer(struct ene_device *dev)
+{
+	u16 tmp;
+
+	ene_read_hw_pointer(dev);
+	dev->r_pointer = dev->w_pointer;
+
+	if (!dev->hw_extra_buffer) {
+		dev->buffer_len = ENE_SAMPLES_SIZE * 2;
+		return;
+	}
+
+	tmp = ene_read_reg(dev, ENE_SAMPLE_BUFFER);
+	tmp |= ene_read_reg(dev, ENE_SAMPLE_BUFFER+1) << 8;
+	dev->extra_buf1_address = tmp;
+
+	dev->extra_buf1_len = ene_read_reg(dev, ENE_SAMPLE_BUFFER + 2);
+
+	tmp = ene_read_reg(dev, ENE_SAMPLE_BUFFER + 3);
+	tmp |= ene_read_reg(dev, ENE_SAMPLE_BUFFER + 4) << 8;
+	dev->extra_buf2_address = tmp;
+
+	dev->extra_buf2_len = ene_read_reg(dev, ENE_SAMPLE_BUFFER + 5);
+
+	dev->buffer_len = dev->extra_buf1_len + dev->extra_buf2_len + 8;
+
+	ene_notice("Hardware uses 2 extended buffers:");
+	ene_notice("  0x%04x - len : %d", dev->extra_buf1_address,
+						dev->extra_buf1_len);
+	ene_notice("  0x%04x - len : %d", dev->extra_buf2_address,
+						dev->extra_buf2_len);
+
+	ene_notice("Total buffer len = %d", dev->buffer_len);
+
+	if (dev->buffer_len > 64 || dev->buffer_len < 16)
+		goto error;
+
+	if (dev->extra_buf1_address > 0xFBFC ||
+					dev->extra_buf1_address < 0xEC00)
+		goto error;
+
+	if (dev->extra_buf2_address > 0xFBFC ||
+					dev->extra_buf2_address < 0xEC00)
+		goto error;
+
+	if (dev->r_pointer > dev->buffer_len)
+		goto error;
+
+	ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND);
+	return;
+error:
+	ene_warn("Error validating extra buffers, device probably won't work");
+	dev->hw_extra_buffer = false;
+	ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND);
+}
+
+
+/* Restore the pointers to extra buffers - to make module reload work*/
+static void ene_restore_extra_buffer(struct ene_device *dev)
+{
+	if (!dev->hw_extra_buffer)
+		return;
+
+	ene_write_reg(dev, ENE_SAMPLE_BUFFER + 0,
+				dev->extra_buf1_address & 0xFF);
+	ene_write_reg(dev, ENE_SAMPLE_BUFFER + 1,
+				dev->extra_buf1_address >> 8);
+	ene_write_reg(dev, ENE_SAMPLE_BUFFER + 2, dev->extra_buf1_len);
+
+	ene_write_reg(dev, ENE_SAMPLE_BUFFER + 3,
+				dev->extra_buf2_address & 0xFF);
+	ene_write_reg(dev, ENE_SAMPLE_BUFFER + 4,
+				dev->extra_buf2_address >> 8);
+	ene_write_reg(dev, ENE_SAMPLE_BUFFER + 5,
+				dev->extra_buf2_len);
+	ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_EXTRA_BUF_HND);
+}
+
 
 /* read irq status and ack it */
 static int ene_irq_status(struct ene_device *dev)
 {
 	u8 irq_status;
 	u8 fw_flags1, fw_flags2;
-	int cur_rx_pointer;
 	int retval = 0;
 
-	fw_flags2 = ene_hw_read_reg(dev, ENE_FW2);
-	cur_rx_pointer = !!(fw_flags2 & ENE_FW2_BUF_HIGH);
+	fw_flags2 = ene_read_reg(dev, ENE_FW2);
 
 	if (dev->hw_revision < ENE_HW_C) {
-		irq_status = ene_hw_read_reg(dev, ENEB_IRQ_STATUS);
+		irq_status = ene_read_reg(dev, ENEB_IRQ_STATUS);
 
 		if (!(irq_status & ENEB_IRQ_STATUS_IR))
 			return 0;
 
-		ene_hw_write_reg(dev, ENEB_IRQ_STATUS,
-				 irq_status & ~ENEB_IRQ_STATUS_IR);
-		dev->rx_pointer = cur_rx_pointer;
+		ene_clear_reg_mask(dev, ENEB_IRQ_STATUS, ENEB_IRQ_STATUS_IR);
 		return ENE_IRQ_RX;
 	}
 
-	irq_status = ene_hw_read_reg(dev, ENEC_IRQ);
-
+	irq_status = ene_read_reg(dev, ENEC_IRQ);
 	if (!(irq_status & ENEC_IRQ_STATUS))
 		return 0;
 
 	/* original driver does that twice - a workaround ? */
-	ene_hw_write_reg(dev, ENEC_IRQ, irq_status & ~ENEC_IRQ_STATUS);
-	ene_hw_write_reg(dev, ENEC_IRQ, irq_status & ~ENEC_IRQ_STATUS);
+	ene_write_reg(dev, ENEC_IRQ, irq_status & ~ENEC_IRQ_STATUS);
+	ene_write_reg(dev, ENEC_IRQ, irq_status & ~ENEC_IRQ_STATUS);
 
-	/* clear unknown flag in F8F9 */
-	if (fw_flags2 & ENE_FW2_IRQ_CLR)
-		ene_hw_write_reg(dev, ENE_FW2, fw_flags2 & ~ENE_FW2_IRQ_CLR);
+	/* check RX interrupt */
+	if (fw_flags2 & ENE_FW2_RXIRQ) {
+		retval |= ENE_IRQ_RX;
+		ene_write_reg(dev, ENE_FW2, fw_flags2 & ~ENE_FW2_RXIRQ);
+	}
 
-	/* check if this is a TX interrupt */
-	fw_flags1 = ene_hw_read_reg(dev, ENE_FW1);
+	/* check TX interrupt */
+	fw_flags1 = ene_read_reg(dev, ENE_FW1);
 	if (fw_flags1 & ENE_FW1_TXIRQ) {
-		ene_hw_write_reg(dev, ENE_FW1, fw_flags1 & ~ENE_FW1_TXIRQ);
+		ene_write_reg(dev, ENE_FW1, fw_flags1 & ~ENE_FW1_TXIRQ);
 		retval |= ENE_IRQ_TX;
 	}
 
-	/* Check if this is RX interrupt */
-	if (dev->rx_pointer != cur_rx_pointer) {
-		retval |= ENE_IRQ_RX;
-		dev->rx_pointer = cur_rx_pointer;
+	return retval;
+}
 
-	} else if (!(retval & ENE_IRQ_TX)) {
-		ene_dbg("RX: interrupt without change in RX pointer(%d)",
-			dev->rx_pointer);
-		retval |= ENE_IRQ_RX;
+/* Read hardware write pointer */
+static void ene_read_hw_pointer(struct ene_device *dev)
+{
+	if (dev->hw_extra_buffer)
+		dev->w_pointer = ene_read_reg(dev, ENE_FW_RX_POINTER);
+	else
+		dev->w_pointer = ene_read_reg(dev, ENE_FW2)
+			& ENE_FW2_BUF_WPTR ? 0 : ENE_SAMPLES_SIZE;
+
+	dbg_verbose("RB: HW write pointer: %02x, driver read pointer: %02x",
+		dev->w_pointer, dev->r_pointer);
+}
+
+/* Gets address of next sample from HW ring buffer */
+static int ene_get_sample_reg(struct ene_device *dev)
+{
+	int r_pointer;
+
+	if (dev->r_pointer == dev->w_pointer) {
+		dbg_verbose("RB: hit end, try update w_pointer");
+		ene_read_hw_pointer(dev);
 	}
 
-	if ((retval & ENE_IRQ_RX) && (retval & ENE_IRQ_TX))
-		ene_dbg("both RX and TX interrupt at same time");
+	if (dev->r_pointer == dev->w_pointer) {
+		dbg_verbose("RB: end of data at %d", dev->r_pointer);
+		return 0;
+	}
 
-	return retval;
+	dbg_verbose("RB: reading at offset %d", dev->r_pointer);
+	r_pointer = dev->r_pointer;
+
+	dev->r_pointer++;
+	if (dev->r_pointer == dev->buffer_len)
+		dev->r_pointer = 0;
+
+	dbg_verbose("RB: next read will be from offset %d", dev->r_pointer);
+
+	if (r_pointer < 8) {
+		dbg_verbose("RB: read at main buffer at %d", r_pointer);
+		return ENE_SAMPLE_BUFFER + r_pointer;
+	}
+
+	r_pointer -= 8;
+
+	if (r_pointer < dev->extra_buf1_len) {
+		dbg_verbose("RB: read at 1st extra buffer at %d", r_pointer);
+		return dev->extra_buf1_address + r_pointer;
+	}
+
+	r_pointer -= dev->extra_buf1_len;
+
+	if (r_pointer < dev->extra_buf2_len) {
+		dbg_verbose("RB: read at 2nd extra buffer at %d", r_pointer);
+		return dev->extra_buf2_address + r_pointer;
+	}
+
+	dbg("attempt to read beyong ring bufer end");
+	return 0;
 }
 
 /* interrupt handler */
 static irqreturn_t ene_isr(int irq, void *data)
 {
-	u16 hw_value;
-	int i, hw_sample;
-	int pulse;
-	int irq_status;
+	u16 hw_value, reg;
+	int hw_sample, irq_status;
+	bool pulse;
 	unsigned long flags;
-	int carrier = 0;
 	irqreturn_t retval = IRQ_NONE;
 	struct ene_device *dev = (struct ene_device *)data;
 	struct ir_raw_event ev;
 
-
 	spin_lock_irqsave(&dev->hw_lock, flags);
+
+	dbg_verbose("ISR called");
+	ene_read_hw_pointer(dev);
 	irq_status = ene_irq_status(dev);
 
 	if (!irq_status)
@@ -544,9 +713,9 @@ static irqreturn_t ene_isr(int irq, void *data)
 	retval = IRQ_HANDLED;
 
 	if (irq_status & ENE_IRQ_TX) {
-
+		dbg_verbose("TX interrupt");
 		if (!dev->hw_learning_and_tx_capable) {
-			ene_dbg("TX interrupt on unsupported device!");
+			dbg("TX interrupt on unsupported device!");
 			goto unlock;
 		}
 		ene_tx_sample(dev);
@@ -555,24 +724,32 @@ static irqreturn_t ene_isr(int irq, void *data)
 	if (!(irq_status & ENE_IRQ_RX))
 		goto unlock;
 
+	dbg_verbose("RX interrupt");
 
 	if (dev->carrier_detect_enabled || debug)
-		carrier = ene_rx_sense_carrier(dev);
-#if 0
-	/* TODO */
-	if (dev->carrier_detect_enabled && carrier)
-		ir_raw_event_report_frequency(dev->idev, carrier);
-#endif
+		ene_rx_sense_carrier(dev);
+
+	/* On hardware that don't support extra buffer we need to trust
+		the interrupt and not track the read pointer */
+	if (!dev->hw_extra_buffer)
+		dev->r_pointer = dev->w_pointer == 0 ? ENE_SAMPLES_SIZE : 0;
 
-	for (i = 0; i < ENE_SAMPLES_SIZE; i++) {
-		hw_value = ene_hw_read_reg(dev,
-				ENE_SAMPLE_BUFFER + dev->rx_pointer * 4 + i);
+	while (1) {
+
+		reg = ene_get_sample_reg(dev);
+
+		dbg_verbose("next sample to read at: %04x", reg);
+		if (!reg)
+			break;
+
+		hw_value = ene_read_reg(dev, reg);
 
 		if (dev->rx_fan_input_inuse) {
+
+			int offset = ENE_SAMPLE_BUFFER_FAN - ENE_SAMPLE_BUFFER;
+
 			/* read high part of the sample */
-			hw_value |= ene_hw_read_reg(dev,
-			    ENE_SAMPLE_BUFFER_FAN +
-					dev->rx_pointer * 4 + i) << 8;
+			hw_value |= ene_read_reg(dev, reg + offset) << 8;
 			pulse = hw_value & ENE_FAN_SMPL_PULS_MSK;
 
 			/* clear space bit, and other unused bits */
@@ -589,12 +766,13 @@ static irqreturn_t ene_isr(int irq, void *data)
 				hw_sample /= 100;
 			}
 		}
-		/* no more data */
-		if (!(hw_value))
-			break;
 
-		ene_dbg("RX: %d (%s)", hw_sample, pulse ? "pulse" : "space");
+		if (!dev->hw_extra_buffer && !hw_sample) {
+			dev->r_pointer = dev->w_pointer;
+			continue;
+		}
 
+		dbg("RX: %d (%s)", hw_sample, pulse ? "pulse" : "space");
 
 		ev.duration = hw_sample * 1000;
 		ev.pulse = pulse;
@@ -611,15 +789,13 @@ unlock:
 static void ene_setup_settings(struct ene_device *dev)
 {
 	dev->tx_period = 32;
-	dev->tx_duty_cycle = 25; /*%*/
+	dev->tx_duty_cycle = 50; /*%*/
 	dev->transmitter_mask = 3;
 
 	/* Force learning mode if (input == 2), otherwise
 		let user set it with LIRC_SET_REC_CARRIER */
 	dev->learning_enabled =
-		(input == 2 && dev->hw_learning_and_tx_capable);
-
-	dev->rx_pointer = -1;
+		(learning_mode && dev->hw_learning_and_tx_capable);
 
 }
 
@@ -630,7 +806,7 @@ static int ene_open(void *data)
 	unsigned long flags;
 
 	spin_lock_irqsave(&dev->hw_lock, flags);
-	dev->in_use = 1;
+	dev->in_use = true;
 	ene_setup_settings(dev);
 	ene_rx_enable(dev);
 	spin_unlock_irqrestore(&dev->hw_lock, flags);
@@ -645,7 +821,7 @@ static void ene_close(void *data)
 	spin_lock_irqsave(&dev->hw_lock, flags);
 
 	ene_rx_disable(dev);
-	dev->in_use = 0;
+	dev->in_use = false;
 	spin_unlock_irqrestore(&dev->hw_lock, flags);
 }
 
@@ -654,11 +830,11 @@ static int ene_set_tx_mask(void *data, u32 tx_mask)
 {
 	struct ene_device *dev = (struct ene_device *)data;
 	unsigned long flags;
-	ene_dbg("TX: attempt to set transmitter mask %02x", tx_mask);
+	dbg("TX: attempt to set transmitter mask %02x", tx_mask);
 
 	/* invalid txmask */
-	if (!tx_mask || tx_mask & ~0x3) {
-		ene_dbg("TX: invalid mask");
+	if (!tx_mask || tx_mask & ~0x03) {
+		dbg("TX: invalid mask");
 		/* return count of transmitters */
 		return 2;
 	}
@@ -674,28 +850,42 @@ static int ene_set_tx_carrier(void *data, u32 carrier)
 {
 	struct ene_device *dev = (struct ene_device *)data;
 	unsigned long flags;
-	u32 period = 1000000 / carrier; /* (1 / freq) (* # usec in 1 sec) */
+	u32 period = 2000000 / carrier;
 
-	ene_dbg("TX: attempt to set tx carrier to %d kHz", carrier);
+	dbg("TX: attempt to set tx carrier to %d kHz", carrier);
 
-	if (period && (period > ENE_TX_PERIOD_MAX ||
-			period < ENE_TX_PERIOD_MIN)) {
+	if (period && (period > ENE_CIRMOD_PRD_MAX ||
+			period < ENE_CIRMOD_PRD_MIN)) {
 
-		ene_dbg("TX: out of range %d-%d carrier, "
-			"falling back to 32 kHz",
-			1000 / ENE_TX_PERIOD_MIN,
-			1000 / ENE_TX_PERIOD_MAX);
+		dbg("TX: out of range %d-%d kHz carrier",
+			2000 / ENE_CIRMOD_PRD_MIN,
+			2000 / ENE_CIRMOD_PRD_MAX);
 
-		period = 32; /* this is just a coincidence!!! */
+		return -1;
 	}
-	ene_dbg("TX: set carrier to %d kHz", carrier);
 
+	dbg("TX: set carrier to %d kHz", carrier);
 	spin_lock_irqsave(&dev->hw_lock, flags);
 	dev->tx_period = period;
 	spin_unlock_irqrestore(&dev->hw_lock, flags);
 	return 0;
 }
 
+/*outside interface : set tx duty cycle */
+static int ene_set_tx_duty_cycle(void *data, u32 duty_cycle)
+{
+	struct ene_device *dev = (struct ene_device *)data;
+	unsigned long flags;
+
+	dbg("TX: setting duty cycle to %d%%", duty_cycle);
+
+	BUG_ON(!duty_cycle || duty_cycle >= 100);
+
+	spin_lock_irqsave(&dev->hw_lock, flags);
+	dev->tx_duty_cycle = duty_cycle;
+	spin_unlock_irqrestore(&dev->hw_lock, flags);
+	return 0;
+}
 
 /* outside interface: enable learning mode */
 static int ene_set_learning_mode(void *data, int enable)
@@ -712,27 +902,20 @@ static int ene_set_learning_mode(void *data, int enable)
 	return 0;
 }
 
-/* outside interface: set rec carrier */
-static int ene_set_rec_carrier(void *data, u32 min, u32 max)
-{
-	struct ene_device *dev = (struct ene_device *)data;
-	ene_set_learning_mode(dev,
-		max > ENE_NORMAL_RX_HI || min < ENE_NORMAL_RX_LOW);
-	return 0;
-}
-
 /* outside interface: enable or disable idle mode */
 static void ene_rx_set_idle(void *data, int idle)
 {
 	struct ene_device *dev = (struct ene_device *)data;
-	ene_dbg("%sabling idle mode", idle ? "en" : "dis");
+	dbg("%sabling idle mode", idle ? "en" : "dis");
 
-	ene_hw_write_reg_mask(dev, ENE_CIR_SAMPLE_PERIOD,
-		(enable_idle && idle) ? 0 : ENE_CIR_SAMPLE_OVERFLOW,
-			ENE_CIR_SAMPLE_OVERFLOW);
+	if (enable_idle && idle)
+		ene_clear_reg_mask(dev,
+			ENE_CIRRLC_CFG, ENE_CIRRLC_CFG_OVERFLOW);
+	else
+		ene_set_reg_mask(dev,
+			ENE_CIRRLC_CFG, ENE_CIRRLC_CFG_OVERFLOW);
 }
 
-
 /* outside interface: transmit */
 static int ene_transmit(void *data, int *buf, u32 n)
 {
@@ -747,7 +930,7 @@ static int ene_transmit(void *data, int *buf, u32 n)
 	dev->tx_sample = 0;
 	dev->tx_sample_pulse = 0;
 
-	ene_dbg("TX: %d samples", dev->tx_len);
+	dbg("TX: %d samples", dev->tx_len);
 
 	spin_lock_irqsave(&dev->hw_lock, flags);
 
@@ -761,16 +944,15 @@ static int ene_transmit(void *data, int *buf, u32 n)
 	spin_unlock_irqrestore(&dev->hw_lock, flags);
 
 	if (wait_for_completion_timeout(&dev->tx_complete, 2 * HZ) == 0) {
-		ene_dbg("TX: timeout");
+		dbg("TX: timeout");
 		spin_lock_irqsave(&dev->hw_lock, flags);
 		ene_tx_complete(dev);
 		spin_unlock_irqrestore(&dev->hw_lock, flags);
 	} else
-		ene_dbg("TX: done");
+		dbg("TX: done");
 	return n;
 }
 
-
 /* probe entry */
 static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id)
 {
@@ -818,16 +1000,17 @@ static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id)
 	if (error)
 		goto error;
 
-	ene_setup_settings(dev);
-
 	if (!dev->hw_learning_and_tx_capable && txsim) {
-		dev->hw_learning_and_tx_capable = 1;
+		dev->hw_learning_and_tx_capable = true;
 		setup_timer(&dev->tx_sim_timer, ene_tx_irqsim,
 						(long unsigned int)dev);
-		ene_printk(KERN_WARNING,
-			"Simulation of TX activated\n");
+		ene_warn("Simulation of TX activated");
 	}
 
+	ene_setup_hw_buffer(dev);
+	ene_setup_settings(dev);
+
+
 	ir_props->driver_type = RC_DRIVER_IR_RAW;
 	ir_props->allowed_protos = IR_TYPE_ALL;
 	ir_props->priv = dev;
@@ -836,9 +1019,7 @@ static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id)
 	ir_props->min_timeout = ENE_MINGAP * 1000;
 	ir_props->max_timeout = ENE_MAXGAP * 1000;
 	ir_props->timeout = ENE_MAXGAP * 1000;
-
-	if (dev->hw_revision == ENE_HW_B)
-		ir_props->s_idle = ene_rx_set_idle;
+	ir_props->s_idle = ene_rx_set_idle;
 
 
 	dev->props = ir_props;
@@ -849,50 +1030,37 @@ static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id)
 		sample_period = -1;
 
 	/* choose default sample period */
-	if (sample_period == -1) {
-
-		sample_period = 50;
-
-		/* on revB, hardware idle mode eats first sample
-		  if we set too low sample period */
-		if (dev->hw_revision == ENE_HW_B && enable_idle)
-			sample_period = 75;
-	}
+	if (sample_period == -1)
+		sample_period = enable_idle ? 75 : 50;
 
 	ir_props->rx_resolution = sample_period * 1000;
 
 	if (dev->hw_learning_and_tx_capable) {
-
 		ir_props->s_learning_mode = ene_set_learning_mode;
-
-		if (input == 0)
-			ir_props->s_rx_carrier_range = ene_set_rec_carrier;
-
 		init_completion(&dev->tx_complete);
 		ir_props->tx_ir = ene_transmit;
 		ir_props->s_tx_mask = ene_set_tx_mask;
 		ir_props->s_tx_carrier = ene_set_tx_carrier;
-		ir_props->tx_resolution = ENE_TX_SMPL_PERIOD * 1000;
+		ir_props->s_tx_duty_cycle = ene_set_tx_duty_cycle;
+		ir_props->tx_resolution = sample_period * 1000;
 		/* ir_props->s_carrier_report = ene_set_carrier_report; */
 	}
 
 
-	device_set_wakeup_capable(&pnp_dev->dev, 1);
-	device_set_wakeup_enable(&pnp_dev->dev, 1);
+	device_set_wakeup_capable(&pnp_dev->dev, true);
+	device_set_wakeup_enable(&pnp_dev->dev, true);
 
 	if (dev->hw_learning_and_tx_capable)
 		input_dev->name = "ENE eHome Infrared Remote Transceiver";
 	else
 		input_dev->name = "ENE eHome Infrared Remote Receiver";
 
-
 	error = -ENODEV;
 	if (ir_input_register(input_dev, RC_MAP_RC6_MCE, ir_props,
 							ENE_DRIVER_NAME))
 		goto error;
 
-
-	ene_printk(KERN_NOTICE, "driver has been succesfully loaded\n");
+	ene_notice("driver has been succesfully loaded");
 	return 0;
 error:
 	if (dev->irq)
@@ -914,6 +1082,7 @@ static void ene_remove(struct pnp_dev *pnp_dev)
 
 	spin_lock_irqsave(&dev->hw_lock, flags);
 	ene_rx_disable(dev);
+	ene_restore_extra_buffer(dev);
 	spin_unlock_irqrestore(&dev->hw_lock, flags);
 
 	free_irq(dev->irq, dev);
@@ -927,18 +1096,21 @@ static void ene_remove(struct pnp_dev *pnp_dev)
 static void ene_enable_wake(struct ene_device *dev, int enable)
 {
 	enable = enable && device_may_wakeup(&dev->pnp_dev->dev);
+	dbg("wake on IR %s", enable ? "enabled" : "disabled");
 
-	ene_dbg("wake on IR %s", enable ? "enabled" : "disabled");
-
-	ene_hw_write_reg_mask(dev, ENE_FW1, enable ?
-		ENE_FW1_WAKE : 0, ENE_FW1_WAKE);
+	if (enable)
+		ene_set_reg_mask(dev, ENE_FW1, ENE_FW1_WAKE);
+	else
+		ene_clear_reg_mask(dev, ENE_FW1, ENE_FW1_WAKE);
 }
 
 #ifdef CONFIG_PM
 static int ene_suspend(struct pnp_dev *pnp_dev, pm_message_t state)
 {
 	struct ene_device *dev = pnp_get_drvdata(pnp_dev);
-	ene_enable_wake(dev, 1);
+	ene_enable_wake(dev, true);
+
+	/* TODO: add support for wake pattern */
 	return 0;
 }
 
@@ -947,8 +1119,7 @@ static int ene_resume(struct pnp_dev *pnp_dev)
 	struct ene_device *dev = pnp_get_drvdata(pnp_dev);
 	if (dev->in_use)
 		ene_rx_enable(dev);
-
-	ene_enable_wake(dev, 0);
+	ene_enable_wake(dev, false);
 	return 0;
 }
 #endif
@@ -956,7 +1127,7 @@ static int ene_resume(struct pnp_dev *pnp_dev)
 static void ene_shutdown(struct pnp_dev *pnp_dev)
 {
 	struct ene_device *dev = pnp_get_drvdata(pnp_dev);
-	ene_enable_wake(dev, 1);
+	ene_enable_wake(dev, true);
 }
 
 static const struct pnp_device_id ene_ids[] = {
@@ -996,16 +1167,14 @@ MODULE_PARM_DESC(sample_period, "Hardware sample period (50 us default)");
 
 module_param(enable_idle, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(enable_idle,
-	"Enables turning off signal sampling after long inactivity time; "
-	"if disabled might help detecting input signal (default: enabled)"
-	" (KB3926B only)");
+	"Turn off input after long inactivity time; "
+	"if disabled might help detecting input signal (default: enabled)");
 
-module_param(input, bool, S_IRUGO);
-MODULE_PARM_DESC(input, "select which input to use "
-	"0 - auto, 1 - standard, 2 - wideband(KB3926C+)");
+module_param(learning_mode, bool, S_IRUGO);
+MODULE_PARM_DESC(learning_mode, "Enable learning mode by default");
 
 module_param(debug, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(debug, "Enable debug (debug=2 verbose debug output)");
+MODULE_PARM_DESC(debug, "Debug level");
 
 module_param(txsim, bool, S_IRUGO);
 MODULE_PARM_DESC(txsim,
@@ -1013,8 +1182,8 @@ MODULE_PARM_DESC(txsim,
 
 MODULE_DEVICE_TABLE(pnp, ene_ids);
 MODULE_DESCRIPTION
-	("Infrared input driver for KB3926B/KB3926C/KB3926D "
-	"(aka ENE0100/ENE0200/ENE0201) CIR port");
+	("Infrared input driver for KB3926B/C/D/E/F "
+	"(aka ENE0100/ENE0200/ENE0201/ENE0202) CIR port");
 
 MODULE_AUTHOR("Maxim Levitsky");
 MODULE_LICENSE("GPL");
diff --git a/drivers/media/IR/ene_ir.h b/drivers/media/IR/ene_ir.h
index 54c76af..69a0ae0 100644
--- a/drivers/media/IR/ene_ir.h
+++ b/drivers/media/IR/ene_ir.h
@@ -1,5 +1,5 @@
 /*
- * driver for ENE KB3926 B/C/D CIR (also known as ENE0XXX)
+ * driver for ENE KB3926 B/C/D/E/F CIR (also known as ENE0XXX)
  *
  * Copyright (C) 2010 Maxim Levitsky <maximlevitsky@gmail.com>
  *
@@ -35,32 +35,44 @@
 #define ENE_SAMPLE_OVERFLOW	0x7F
 #define ENE_SAMPLES_SIZE	4
 
-/* fan input sample buffer */
-#define ENE_SAMPLE_BUFFER_FAN	0xF8FB	/* this buffer holds high byte of */
-					/* each sample of normal buffer */
-#define ENE_FAN_SMPL_PULS_MSK	0x8000	/* this bit of combined sample */
-					/* if set, says that sample is pulse */
-#define ENE_FAN_VALUE_MASK	0x0FFF  /* mask for valid bits of the value */
-
 /* first firmware register */
-#define ENE_FW1			0xF8F8
+#define ENE_FW1			0xF8F8  /* flagr */
 #define	ENE_FW1_ENABLE		0x01	/* enable fw processing */
 #define ENE_FW1_TXIRQ		0x02	/* TX interrupt pending */
+#define ENE_FW1_HAS_EXTRA_BUF	0x04	/* fw uses extra buffer*/
+#define ENE_FW1_EXTRA_BUF_HND	0x08	/* extra buffer handshake bit*/
+#define ENE_FW1_LED_ON		0x10	/* turn on a led */
+
+#define ENE_FW1_WPATTERN	0x20	/* enable wake pattern */
 #define ENE_FW1_WAKE		0x40	/* enable wake from S3 */
 #define ENE_FW1_IRQ		0x80	/* enable interrupt */
 
 /* second firmware register */
-#define ENE_FW2			0xF8F9
-#define ENE_FW2_BUF_HIGH	0x01	/* which half of the buffer to read */
-#define ENE_FW2_IRQ_CLR		0x04	/* clear this on IRQ */
-#define ENE_FW2_GP40_AS_LEARN	0x08	/* normal input is used as */
-					/* learning input */
-#define ENE_FW2_FAN_AS_NRML_IN	0x40	/* fan is used as normal input */
+#define ENE_FW2			0xF8F9  /* flagw */
+#define ENE_FW2_BUF_WPTR	0x01	/* which half of the buffer to read */
+#define ENE_FW2_RXIRQ		0x04	/* RX IRQ pending*/
+#define ENE_FW2_GP0A		0x08	/* 0: GPIO0A - normal input, GPIO40 - learning input */
+					/* 1: GPIO40 - normal input, GPIO0A - learning input */
+#define ENE_FW2_EMMITER1_CONN	0x10	/* TX emmiter 1 connected */
+#define ENE_FW2_EMMITER2_CONN	0x20	/* TX emmiter 2 connected */
+
+#define ENE_FW2_FAN_INPUT	0x40	/* fan input gives IR data*/
 #define ENE_FW2_LEARNING	0x80	/* hardware supports learning and TX */
 
+/* firmware RX pointer for new style buffer */
+#define ENE_FW_RX_POINTER	0xF8FA
+
+/* fan input sample buffer (8 bytes) */
+#define ENE_SAMPLE_BUFFER_FAN	0xF8FB	/* this buffer holds high byte of */
+					/* each sample of normal buffer */
+#define ENE_FAN_SMPL_PULS_MSK	0x8000	/* this bit of combined sample */
+					/* if set, says that sample is pulse */
+#define ENE_FAN_VALUE_MASK	0x0FFF  /* mask for valid bits of the value */
+
+
 /* transmitter ports */
-#define ENE_TX_PORT2		0xFC01	/* this enables one or both */
-#define ENE_TX_PORT2_EN		0x20	/* TX ports */
+#define ENE_TX_PORT2		0xFC01
+#define ENE_TX_PORT2_EN		0x20
 #define ENE_TX_PORT1		0xFC08
 #define ENE_TX_PORT1_EN		0x02
 
@@ -70,7 +82,7 @@
 #define ENEB_IRQ_STATUS		0xFD80	/* irq status */
 #define ENEB_IRQ_STATUS_IR	0x20	/* IR irq */
 
-/* fan as input settings - only if learning capable */
+/* fan as input settings */
 #define ENE_FAN_AS_IN1		0xFE30  /* fan init reg 1 */
 #define ENE_FAN_AS_IN1_EN	0xCD
 #define ENE_FAN_AS_IN2		0xFE31  /* fan init reg 2 */
@@ -83,43 +95,73 @@
 #define ENEC_IRQ_UNK_EN		0x10	/* always enabled */
 #define ENEC_IRQ_STATUS		0x20	/* irq status and ACK */
 
-/* CIR block settings */
-#define ENE_CIR_CONF1		0xFEC0
-#define ENE_CIR_CONF1_TX_CLEAR	0x01	/* clear that on revC */
-					/* while transmitting */
-#define ENE_CIR_CONF1_RX_ON	0x07	/* normal receiver enabled */
-#define ENE_CIR_CONF1_LEARN1	0x08	/* enabled on learning mode */
-#define ENE_CIR_CONF1_TX_ON	0x30	/* enabled on transmit */
-#define ENE_CIR_CONF1_TX_CARR	0x80	/* send TX carrier or not */
-
-#define ENE_CIR_CONF2		0xFEC1	/* unknown setting = 0 */
-#define ENE_CIR_CONF2_LEARN2	0x10	/* set on enable learning */
-#define ENE_CIR_CONF2_GPIO40DIS	0x20	/* disable input via gpio40 */
-
-#define ENE_CIR_SAMPLE_PERIOD	0xFEC8	/* sample period in us */
-#define ENE_CIR_SAMPLE_OVERFLOW	0x80	/* interrupt on overflows if set */
-
-
-/* Two byte tx buffer */
-#define ENE_TX_INPUT1		0xFEC9
-#define ENE_TX_INPUT2		0xFECA
-#define ENE_TX_PULSE_MASK	0x80	/* Transmitted sample is pulse */
-#define ENE_TX_SMLP_MASK	0x7F
-#define ENE_TX_SMPL_PERIOD	50	/* transmit sample period - fixed */
+/* CIR Config register #1 */
+#define ENE_CIRCFG		0xFEC0
+#define ENE_CIRCFG_RX_EN	0x01	/* RX enable */
+#define ENE_CIRCFG_RX_IRQ	0x02	/* Enable hardware interrupt */
+#define ENE_CIRCFG_REV_POL	0x04	/* Input polarity reversed */
+#define ENE_CIRCFG_CARR_DEMOD	0x08	/* Enable carrier demodulator */
+
+#define ENE_CIRCFG_TX_EN	0x10	/* TX enable */
+#define ENE_CIRCFG_TX_IRQ	0x20	/* Send interrupt on TX done */
+#define ENE_CIRCFG_TX_POL_REV	0x40	/* TX polarity reversed */
+#define ENE_CIRCFG_TX_CARR	0x80	/* send TX carrier or not */
+
+/* CIR config register #2 */
+#define ENE_CIRCFG2		0xFEC1
+#define ENE_CIRCFG2_RLC		0x00
+#define ENE_CIRCFG2_RC5		0x01
+#define ENE_CIRCFG2_RC6		0x02
+#define ENE_CIRCFG2_NEC		0x03
+#define ENE_CIRCFG2_CARR_DETECT	0x10	/* Enable carrier detection */
+#define ENE_CIRCFG2_GPIO0A	0x20	/* Use GPIO0A instead of GPIO40 for input */
+#define ENE_CIRCFG2_FAST_SAMPL1	0x40	/* Fast leading pulse detection for RC6 */
+#define ENE_CIRCFG2_FAST_SAMPL2	0x80	/* Fast data detection for RC6 */
+
+/* Knobs for protocol decoding - will document when/if will use them */
+#define ENE_CIRPF		0xFEC2
+#define ENE_CIRHIGH		0xFEC3
+#define ENE_CIRBIT		0xFEC4
+#define ENE_CIRSTART		0xFEC5
+#define ENE_CIRSTART2		0xFEC6
+
+/* Actual register which contains RLC RX data - read by firmware */
+#define ENE_CIRDAT_IN		0xFEC7
+
+
+/* RLC configuration - sample period (1us resulution) + idle mode */
+#define ENE_CIRRLC_CFG		0xFEC8
+#define ENE_CIRRLC_CFG_OVERFLOW	0x80	/* interrupt on overflows if set */
+
+/* Two byte RLC TX buffer */
+#define ENE_CIRRLC_OUT0		0xFEC9
+#define ENE_CIRRLC_OUT1		0xFECA
+#define ENE_CIRRLC_OUT_PULSE	0x80	/* Transmitted sample is pulse */
+#define ENE_CIRRLC_OUT_MASK	0x7F
+
+
+/* Carrier detect setting
+ * Low nibble  - number of carrier pulses to average
+ * High nibble - number of initial carrier pulses to discard
+ */
+#define ENE_CIRCAR_PULS		0xFECB
 
+/* detected RX carrier period (resolution: 500 ns) */
+#define ENE_CIRCAR_PRD		0xFECC
+#define ENE_CIRCAR_PRD_VALID	0x80	/* data valid content valid */
 
-/* Unknown TX setting - TX sample period ??? */
-#define ENE_TX_UNK1		0xFECB	/* set to 0x63 */
+/* detected RX carrier pulse width (resolution: 500 ns) */
+#define ENE_CIRCAR_HPRD		0xFECD
 
-/* Current received carrier period */
-#define ENE_RX_CARRIER		0xFECC	/* RX period (500 ns) */
-#define ENE_RX_CARRIER_VALID	0x80	/* Register content valid */
+/* TX period (resolution: 500 ns, minimum 2)*/
+#define ENE_CIRMOD_PRD		0xFECE
+#define ENE_CIRMOD_PRD_POL	0x80	/* TX carrier polarity*/
 
+#define ENE_CIRMOD_PRD_MAX	0x7F	/* 15.87 kHz */
+#define ENE_CIRMOD_PRD_MIN	0x02	/* 1 Mhz */
 
-/* TX period (1/carrier) */
-#define ENE_TX_PERIOD		0xFECE	/* TX period (500 ns) */
-#define ENE_TX_PERIOD_UNKBIT	0x80	/* This bit set on transmit*/
-#define ENE_TX_PERIOD_PULSE	0xFECF	/* TX pulse period (500 ns)*/
+/* TX pulse width (resolution: 500 ns)*/
+#define ENE_CIRMOD_HPRD		0xFECF
 
 /* Hardware versions */
 #define ENE_HW_VERSION		0xFF00	/* hardware revision */
@@ -132,34 +174,21 @@
 #define ENE_HW_VER_MINOR	0xFF1F
 #define ENE_HW_VER_OLD		0xFD00
 
-/* Normal/Learning carrier ranges - only valid if we have learning input*/
-/* TODO: test */
-#define ENE_NORMAL_RX_LOW	34
-#define ENE_NORMAL_RX_HI	38
-
-/* Tx carrier range */
-/* Hardware might be able to do more, but this range is enough for
-   all purposes */
-#define ENE_TX_PERIOD_MAX	32	/* corresponds to 29.4 kHz */
-#define ENE_TX_PERIOD_MIN	16	/* corrsponds to 62.5 kHz */
 
+/* TX sample format */
 
 
 /* Minimal and maximal gaps */
 
 /* Normal case:
-	Minimal gap is 0x7F * sample period
-	Maximum gap depends on hardware.
-	For KB3926B, it is unlimited, for newer models its around
-	250000, after which HW stops sending samples, and that is
-	not possible to change */
-
-/* Fan case:
-	Both minimal and maximal gaps are same, and equal to 0xFFF * 0x61
-	And there is nothing to change this setting
-*/
-
-#define ENE_MAXGAP		250000
+ *      Minimal gap is 0x7F * sample period - size of one full sample
+ *      Maximum gap is infinite
+ *  Fan feedback input case:
+ *      Both minimal and maximal gaps are same, and equal to 0xFFF * 0x61
+ *      And there is nothing to change this setting
+ */
+
+#define ENE_MAXGAP		(0xFFF * 0x61)
 #define ENE_MINGAP		(127 * sample_period)
 
 /******************************************************************************/
@@ -171,20 +200,27 @@
 
 #define  ENE_HW_B		1	/* 3926B */
 #define  ENE_HW_C		2	/* 3926C */
-#define  ENE_HW_D		3	/* 3926D */
+#define  ENE_HW_D		3	/* 3926D or later */
 
 #define ene_printk(level, text, ...) \
-	printk(level ENE_DRIVER_NAME ": " text, ## __VA_ARGS__)
+	printk(level ENE_DRIVER_NAME ": " text "\n", ## __VA_ARGS__)
+
+#define ene_notice(text, ...) ene_printk(KERN_NOTICE, text, ## __VA_ARGS__)
+#define ene_warn(text, ...) ene_printk(KERN_WARNING, text, ## __VA_ARGS__)
 
-#define ene_dbg(text, ...) \
-	if (debug) \
-		printk(KERN_DEBUG \
-			ENE_DRIVER_NAME ": " text "\n" , ## __VA_ARGS__)
 
-#define ene_dbg_verbose(text, ...) \
-	if (debug > 1) \
-		printk(KERN_DEBUG \
-			ENE_DRIVER_NAME ": " text "\n" , ## __VA_ARGS__)
+#define __dbg(level, format, ...) \
+	do { \
+		if (debug >= level) \
+			printk(KERN_DEBUG ENE_DRIVER_NAME \
+				": " format "\n", ## __VA_ARGS__); \
+	} while (0)
+
+
+#define dbg(format, ...)		__dbg(1, format, ## __VA_ARGS__)
+#define dbg_verbose(format, ...)	__dbg(2, format, ## __VA_ARGS__)
+#define dbg_regs(format, ...)		__dbg(3, format, ## __VA_ARGS__)
+
 
 
 struct ene_device {
@@ -200,12 +236,15 @@ struct ene_device {
 
 	/* HW features */
 	int hw_revision;			/* hardware revision */
-	bool hw_learning_and_tx_capable;	/* learning capable */
-	bool hw_gpio40_learning;		/* gpio40 is learning */
-	bool hw_fan_as_normal_input;		/* fan input is used as */
-						/* regular input */
+	bool hw_use_gpio_0a;			/* gpio40 is demodulated input*/
+	bool hw_extra_buffer;			/* hardware has 'extra buffer' */
+
+	bool hw_fan_input;			/* fan input is IR data source */
+	bool hw_learning_and_tx_capable;	/* learning & tx capable */
+
 	/* HW state*/
-	int rx_pointer;				/* hw pointer to rx buffer */
+	int r_pointer;				/* pointer to next sample to read */
+	int w_pointer;				/* pointer to next sample hw will write */
 	bool rx_fan_input_inuse;		/* is fan input in use for rx*/
 	int tx_reg;				/* current reg used for TX */
 	u8  saved_conf1;			/* saved FEC0 reg */
@@ -232,4 +271,14 @@ struct ene_device {
 	bool learning_enabled;			/* learning input enabled */
 	bool carrier_detect_enabled;		/* carrier detect enabled */
 	int rx_period_adjust;
+
+	/* Extra RX buffer location */
+	int buffer_len;
+	int extra_buf1_address;
+	int extra_buf1_len;
+	int extra_buf2_address;
+	int extra_buf2_len;
 };
+
+static int ene_irq_status(struct ene_device *dev);
+static void ene_read_hw_pointer(struct ene_device *dev);
\ No newline at end of file
-- 
1.7.0.4

[PATCH 6/7] IR: extend ir_raw_event and do refactoring

[Maxim Levitsky]

Add new event types for timeout & carrier report
Move timeout handling from ir_raw_event_store_with_filter to
ir-lirc-codec, where it is really needed.
Now lirc bridge ensures proper gap handling.
Extend lirc bridge for carrier & timeout reports

Note: all new ir_raw_event variables now should be initialized
like that:
struct ir_raw_event ev = ir_new_event;

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ene_ir.c          |    2 +-
 drivers/media/IR/ene_ir.h          |    2 +-
 drivers/media/IR/ir-core-priv.h    |   11 +++++-
 drivers/media/IR/ir-jvc-decoder.c  |    5 ++-
 drivers/media/IR/ir-lirc-codec.c   |   66 ++++++++++++++++++++++++++++++++----
 drivers/media/IR/ir-nec-decoder.c  |    5 ++-
 drivers/media/IR/ir-raw-event.c    |   41 +++++-----------------
 drivers/media/IR/ir-rc5-decoder.c  |    5 ++-
 drivers/media/IR/ir-rc6-decoder.c  |    5 ++-
 drivers/media/IR/ir-sony-decoder.c |    5 ++-
 drivers/media/IR/mceusb.c          |    2 +-
 drivers/media/IR/streamzap.c       |    6 ++--
 include/media/ir-core.h            |   26 ++++++++++++--
 13 files changed, 121 insertions(+), 60 deletions(-)

diff --git a/drivers/media/IR/ene_ir.c b/drivers/media/IR/ene_ir.c
index 8e3e0c8..c7bbbca 100644
--- a/drivers/media/IR/ene_ir.c
+++ b/drivers/media/IR/ene_ir.c
@@ -699,7 +699,7 @@ static irqreturn_t ene_isr(int irq, void *data)
 	unsigned long flags;
 	irqreturn_t retval = IRQ_NONE;
 	struct ene_device *dev = (struct ene_device *)data;
-	struct ir_raw_event ev;
+	struct ir_raw_event ev = ir_new_event;
 
 	spin_lock_irqsave(&dev->hw_lock, flags);
 
diff --git a/drivers/media/IR/ene_ir.h b/drivers/media/IR/ene_ir.h
index 69a0ae0..27b2eb0 100644
--- a/drivers/media/IR/ene_ir.h
+++ b/drivers/media/IR/ene_ir.h
@@ -188,7 +188,7 @@
  *      And there is nothing to change this setting
  */
 
-#define ENE_MAXGAP		(0xFFF * 0x61)
+#define ENE_MAXGAP		20000
 #define ENE_MINGAP		(127 * sample_period)
 
 /******************************************************************************/
diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h
index 5d7e08f..a287373 100644
--- a/drivers/media/IR/ir-core-priv.h
+++ b/drivers/media/IR/ir-core-priv.h
@@ -82,6 +82,10 @@ struct ir_raw_event_ctrl {
 		struct ir_input_dev *ir_dev;
 		struct lirc_driver *drv;
 		int carrier_low;
+		ktime_t timeout_start;
+		bool timeout;
+		bool send_timeout_reports;
+
 	} lirc;
 };
 
@@ -109,9 +113,14 @@ static inline void decrease_duration(struct ir_raw_event *ev, unsigned duration)
 		ev->duration -= duration;
 }
 
+/* Returns true if event is normal pulse/space event */
+static inline bool is_timing_event(struct ir_raw_event ev)
+{
+	return !ev.carrier_report && !ev.reset;
+}
+
 #define TO_US(duration)			DIV_ROUND_CLOSEST((duration), 1000)
 #define TO_STR(is_pulse)		((is_pulse) ? "pulse" : "space")
-#define IS_RESET(ev)			(ev.duration == 0)
 /*
  * Routines from ir-sysfs.c - Meant to be called only internally inside
  * ir-core
diff --git a/drivers/media/IR/ir-jvc-decoder.c b/drivers/media/IR/ir-jvc-decoder.c
index 77a89c4..63dca6e 100644
--- a/drivers/media/IR/ir-jvc-decoder.c
+++ b/drivers/media/IR/ir-jvc-decoder.c
@@ -50,8 +50,9 @@ static int ir_jvc_decode(struct input_dev *input_dev, struct ir_raw_event ev)
 	if (!(ir_dev->raw->enabled_protocols & IR_TYPE_JVC))
 		return 0;
 
-	if (IS_RESET(ev)) {
-		data->state = STATE_INACTIVE;
+	if (!is_timing_event(ev)) {
+		if (ev.reset)
+			data->state = STATE_INACTIVE;
 		return 0;
 	}
 
diff --git a/drivers/media/IR/ir-lirc-codec.c b/drivers/media/IR/ir-lirc-codec.c
index e63f757..e6ca7a3 100644
--- a/drivers/media/IR/ir-lirc-codec.c
+++ b/drivers/media/IR/ir-lirc-codec.c
@@ -32,7 +32,9 @@
 static int ir_lirc_decode(struct input_dev *input_dev, struct ir_raw_event ev)
 {
 	struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+	struct lirc_codec *lirc = &ir_dev->raw->lirc;
 	int sample;
+	int duration_msec;
 
 	if (!(ir_dev->raw->enabled_protocols & IR_TYPE_LIRC))
 		return 0;
@@ -40,21 +42,56 @@ static int ir_lirc_decode(struct input_dev *input_dev, struct ir_raw_event ev)
 	if (!ir_dev->raw->lirc.drv || !ir_dev->raw->lirc.drv->rbuf)
 		return -EINVAL;
 
-	if (IS_RESET(ev))
+	duration_msec = DIV_ROUND_CLOSEST(ev.duration, 1000);
+
+	if (ev.reset)
 		return 0;
 
-	IR_dprintk(2, "LIRC data transfer started (%uus %s)\n",
-		   TO_US(ev.duration), TO_STR(ev.pulse));
+	if (ev.carrier_report) {
+		/* TODO: send RX duty cycle */
+		sample = LIRC_FREQUENCY(ev.carrier);
+
+	} else if (ev.timeout) {
+		WARN_ON(lirc->timeout || ev.pulse);
+		lirc->timeout_start = ktime_get();
+		lirc->timeout = true;
+
+		if (!lirc->send_timeout_reports)
+			return 0;
+
+		sample = LIRC_TIMEOUT(duration_msec);
+
+	} else {
+
+		if (ev.pulse)
+			sample = LIRC_PULSE(duration_msec);
+		else
+			sample = LIRC_SPACE(duration_msec);
+	}
+
+	/* Write the combined timeout sample now */
+	if (lirc->timeout) {
+		ktime_t now = ktime_get();
+		int timeout_sample;
+
+		u64 duration = ktime_to_ns(ktime_sub(now, lirc->timeout_start))
+				+ ir_dev->raw->prev_ev.duration;
+
+		duration_msec = min(DIV_ROUND_CLOSEST(duration, 1000),
+						(u64)LIRC_VALUE_MASK);
 
-	sample = ev.duration / 1000;
-	if (ev.pulse)
-		sample |= PULSE_BIT;
+		timeout_sample = LIRC_SPACE(duration_msec);
+
+		lirc_buffer_write(ir_dev->raw->lirc.drv->rbuf,
+				(unsigned char *) &timeout_sample);
+
+		lirc->timeout = false;
+	}
 
 	lirc_buffer_write(ir_dev->raw->lirc.drv->rbuf,
 			  (unsigned char *) &sample);
 	wake_up(&ir_dev->raw->lirc.drv->rbuf->wait_poll);
 
-
 	return 0;
 }
 
@@ -207,6 +244,17 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
 		ir_dev->props->timeout = val * 1000;
 		break;
 
+	case LIRC_SET_REC_TIMEOUT_REPORTS:
+		lirc->send_timeout_reports = !!val;
+		break;
+
+	case LIRC_SET_MEASURE_CARRIER_MODE:
+
+		if (!ir_dev->props->s_carrier_report)
+			return -ENOSYS;
+		return ir_dev->props->s_carrier_report(
+			ir_dev->props->priv, !!val);
+
 	default:
 		return lirc_dev_fop_ioctl(filep, cmd, arg);
 	}
@@ -277,6 +325,10 @@ static int ir_lirc_register(struct input_dev *input_dev)
 	if (ir_dev->props->s_learning_mode)
 		features |= LIRC_CAN_USE_WIDEBAND_RECEIVER;
 
+	if (ir_dev->props->s_carrier_report)
+		features |= LIRC_CAN_MEASURE_CARRIER;
+
+
 	if (ir_dev->props->max_timeout)
 		features |= LIRC_CAN_SET_REC_TIMEOUT;
 
diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c
index d597421..70993f7 100644
--- a/drivers/media/IR/ir-nec-decoder.c
+++ b/drivers/media/IR/ir-nec-decoder.c
@@ -54,8 +54,9 @@ static int ir_nec_decode(struct input_dev *input_dev, struct ir_raw_event ev)
 	if (!(ir_dev->raw->enabled_protocols & IR_TYPE_NEC))
 		return 0;
 
-	if (IS_RESET(ev)) {
-		data->state = STATE_INACTIVE;
+	if (!is_timing_event(ev)) {
+		if (ev.reset)
+			data->state = STATE_INACTIVE;
 		return 0;
 	}
 
diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c
index 56797be..a758977 100644
--- a/drivers/media/IR/ir-raw-event.c
+++ b/drivers/media/IR/ir-raw-event.c
@@ -174,7 +174,7 @@ int ir_raw_event_store_with_filter(struct input_dev *input_dev,
 	if (ir->idle && !ev->pulse)
 		return 0;
 	else if (ir->idle)
-		ir_raw_event_set_idle(input_dev, 0);
+		ir_raw_event_set_idle(input_dev, false);
 
 	if (!raw->this_ev.duration) {
 		raw->this_ev = *ev;
@@ -187,8 +187,12 @@ int ir_raw_event_store_with_filter(struct input_dev *input_dev,
 
 	/* Enter idle mode if nessesary */
 	if (!ev->pulse && ir->props->timeout &&
-		raw->this_ev.duration >= ir->props->timeout)
-		ir_raw_event_set_idle(input_dev, 1);
+		raw->this_ev.duration >= ir->props->timeout) {
+		raw->this_ev.timeout = true;
+		ir_raw_event_store(input_dev, &raw->this_ev);
+		raw->this_ev.duration = 0;
+		ir_raw_event_set_idle(input_dev, true);
+	}
 	return 0;
 }
 EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter);
@@ -196,39 +200,12 @@ EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter);
 void ir_raw_event_set_idle(struct input_dev *input_dev, int idle)
 {
 	struct ir_input_dev *ir = input_get_drvdata(input_dev);
-	struct ir_raw_event_ctrl *raw = ir->raw;
-	ktime_t now;
-	u64 delta;
 
-	if (!ir->props)
+	if (!ir->props || !ir->raw)
 		return;
 
-	if (!ir->raw)
-		goto out;
-
-	if (idle) {
-		IR_dprintk(2, "enter idle mode\n");
-		raw->last_event = ktime_get();
-	} else {
-		IR_dprintk(2, "exit idle mode\n");
-
-		now = ktime_get();
-		delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event));
+	IR_dprintk(2, "%s idle mode\n", idle ? "enter" : "leave");
 
-		WARN_ON(raw->this_ev.pulse);
-
-		raw->this_ev.duration =
-			min(raw->this_ev.duration + delta,
-						(u64)IR_MAX_DURATION);
-
-		ir_raw_event_store(input_dev, &raw->this_ev);
-
-		if (raw->this_ev.duration == IR_MAX_DURATION)
-			ir_raw_event_reset(input_dev);
-
-		raw->this_ev.duration = 0;
-	}
-out:
 	if (ir->props->s_idle)
 		ir->props->s_idle(ir->props->priv, idle);
 	ir->idle = idle;
diff --git a/drivers/media/IR/ir-rc5-decoder.c b/drivers/media/IR/ir-rc5-decoder.c
index df4770d..572ed4c 100644
--- a/drivers/media/IR/ir-rc5-decoder.c
+++ b/drivers/media/IR/ir-rc5-decoder.c
@@ -55,8 +55,9 @@ static int ir_rc5_decode(struct input_dev *input_dev, struct ir_raw_event ev)
         if (!(ir_dev->raw->enabled_protocols & IR_TYPE_RC5))
                 return 0;
 
-	if (IS_RESET(ev)) {
-		data->state = STATE_INACTIVE;
+	if (!is_timing_event(ev)) {
+		if (ev.reset)
+			data->state = STATE_INACTIVE;
 		return 0;
 	}
 
diff --git a/drivers/media/IR/ir-rc6-decoder.c b/drivers/media/IR/ir-rc6-decoder.c
index f1624b8..d25da91 100644
--- a/drivers/media/IR/ir-rc6-decoder.c
+++ b/drivers/media/IR/ir-rc6-decoder.c
@@ -85,8 +85,9 @@ static int ir_rc6_decode(struct input_dev *input_dev, struct ir_raw_event ev)
 	if (!(ir_dev->raw->enabled_protocols & IR_TYPE_RC6))
 		return 0;
 
-	if (IS_RESET(ev)) {
-		data->state = STATE_INACTIVE;
+	if (!is_timing_event(ev)) {
+		if (ev.reset)
+			data->state = STATE_INACTIVE;
 		return 0;
 	}
 
diff --git a/drivers/media/IR/ir-sony-decoder.c b/drivers/media/IR/ir-sony-decoder.c
index b9074f0..2d15730 100644
--- a/drivers/media/IR/ir-sony-decoder.c
+++ b/drivers/media/IR/ir-sony-decoder.c
@@ -48,8 +48,9 @@ static int ir_sony_decode(struct input_dev *input_dev, struct ir_raw_event ev)
 	if (!(ir_dev->raw->enabled_protocols & IR_TYPE_SONY))
 		return 0;
 
-	if (IS_RESET(ev)) {
-		data->state = STATE_INACTIVE;
+	if (!is_timing_event(ev)) {
+		if (ev.reset)
+			data->state = STATE_INACTIVE;
 		return 0;
 	}
 
diff --git a/drivers/media/IR/mceusb.c b/drivers/media/IR/mceusb.c
index ac6bb2c..44f041e 100644
--- a/drivers/media/IR/mceusb.c
+++ b/drivers/media/IR/mceusb.c
@@ -656,7 +656,7 @@ static int mceusb_set_tx_carrier(void *priv, u32 carrier)
 
 static void mceusb_process_ir_data(struct mceusb_dev *ir, int buf_len)
 {
-	struct ir_raw_event rawir = { .pulse = false, .duration = 0 };
+	struct ir_raw_event rawir = ir_new_event;
 	int i, start_index = 0;
 	u8 hdr = MCE_CONTROL_HEADER;
 
diff --git a/drivers/media/IR/streamzap.c b/drivers/media/IR/streamzap.c
index 058e29f..9b0e246 100644
--- a/drivers/media/IR/streamzap.c
+++ b/drivers/media/IR/streamzap.c
@@ -170,7 +170,7 @@ static void streamzap_flush_timeout(unsigned long arg)
 static void streamzap_delay_timeout(unsigned long arg)
 {
 	struct streamzap_ir *sz = (struct streamzap_ir *)arg;
-	struct ir_raw_event rawir = { .pulse = false, .duration = 0 };
+	struct ir_raw_event rawir = ir_new_event;
 	unsigned long flags;
 	int len, ret;
 	static unsigned long delay;
@@ -215,7 +215,7 @@ static void streamzap_delay_timeout(unsigned long arg)
 
 static void streamzap_flush_delay_buffer(struct streamzap_ir *sz)
 {
-	struct ir_raw_event rawir = { .pulse = false, .duration = 0 };
+	struct ir_raw_event rawir = ir_new_event;
 	bool wake = false;
 	int ret;
 
@@ -233,7 +233,7 @@ static void streamzap_flush_delay_buffer(struct streamzap_ir *sz)
 
 static void sz_push(struct streamzap_ir *sz)
 {
-	struct ir_raw_event rawir = { .pulse = false, .duration = 0 };
+	struct ir_raw_event rawir = ir_new_event;
 	unsigned long flags;
 	int ret;
 
diff --git a/include/media/ir-core.h b/include/media/ir-core.h
index eb7fddf..3b798f5 100644
--- a/include/media/ir-core.h
+++ b/include/media/ir-core.h
@@ -60,6 +60,7 @@ enum rc_driver_type {
  * @s_idle: optional: enable/disable hardware idle mode, upon which,
 	device doesn't interrupt host until it sees IR pulses
  * @s_learning_mode: enable wide band receiver used for learning
+ * @s_carrier_report: enable carrier reports
  */
 struct ir_dev_props {
 	enum rc_driver_type	driver_type;
@@ -84,6 +85,7 @@ struct ir_dev_props {
 	int			(*tx_ir)(void *priv, int *txbuf, u32 n);
 	void			(*s_idle)(void *priv, int enable);
 	int			(*s_learning_mode)(void *priv, int enable);
+	int			(*s_carrier_report) (void *priv, int enable);
 };
 
 struct ir_input_dev {
@@ -162,11 +164,25 @@ u32 ir_g_keycode_from_table(struct input_dev *input_dev, u32 scancode);
 /* From ir-raw-event.c */
 
 struct ir_raw_event {
-	unsigned                        pulse:1;
-	unsigned                        duration:31;
+	union {
+		u32             duration;
+
+		struct {
+			u32     carrier;
+			u8      duty_cycle;
+		};
+	};
+
+	unsigned                pulse:1;
+	unsigned                reset:1;
+	unsigned                timeout:1;
+	unsigned                carrier_report:1;
 };
 
-#define IR_MAX_DURATION                 0x7FFFFFFF      /* a bit more than 2 seconds */
+#define ir_new_event \
+	{ .pulse = 0, .reset = 0, .timeout = 0, .carrier_report = 0 }
+
+#define IR_MAX_DURATION         0xFFFFFFFF      /* a bit more than 2 seconds */
 
 void ir_raw_event_handle(struct input_dev *input_dev);
 int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev);
@@ -177,7 +193,9 @@ void ir_raw_event_set_idle(struct input_dev *input_dev, int idle);
 
 static inline void ir_raw_event_reset(struct input_dev *input_dev)
 {
-	struct ir_raw_event ev = { .pulse = false, .duration = 0 };
+	struct ir_raw_event ev = ir_new_event;
+	ev.reset = true;
+
 	ir_raw_event_store(input_dev, &ev);
 	ir_raw_event_handle(input_dev);
 }
-- 
1.7.0.4

Re: [PATCH 6/7] IR: extend ir_raw_event and do refactoring

[David Härdeman]

On Mon, Aug 30, 2010 at 11:52:26AM +0300, Maxim Levitsky wrote:
> Add new event types for timeout & carrier report
> Move timeout handling from ir_raw_event_store_with_filter to
> ir-lirc-codec, where it is really needed.

Yes, but it still might make more sense to keep the timeout handling in 
ir_raw_event_store_with_filter so that all decoders get the same data 
from rc-core?

> Now lirc bridge ensures proper gap handling.
> Extend lirc bridge for carrier & timeout reports
> 
> Note: all new ir_raw_event variables now should be initialized
> like that:
> struct ir_raw_event ev = ir_new_event;

Wouldn't DEFINE_RAW_EVENT(ev); be more in line with the kernel coding 
style? (cf. DEFINE_MUTEX, DEFINE_SPINLOCK, etc).

-- 
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Re: [PATCH 6/7] IR: extend ir_raw_event and do refactoring

[Maxim Levitsky]

On Thu, 2010-09-02 at 22:56 +0200, David Härdeman wrote: 
> On Mon, Aug 30, 2010 at 11:52:26AM +0300, Maxim Levitsky wrote:
> > Add new event types for timeout & carrier report
> > Move timeout handling from ir_raw_event_store_with_filter to
> > ir-lirc-codec, where it is really needed.
> 
> Yes, but it still might make more sense to keep the timeout handling in 
> ir_raw_event_store_with_filter so that all decoders get the same data 
> from rc-core?
I don't want any timeouts in rc-core. There is just an IR packet that
starts optionally with a reset and ends with a timeout bit.
I have also nothing against renaming reset/timeout to start/stop.

rc-core really shouldn't care about consistent pulse/space ordering.
Its lirc that needs it.

Also in the future I think I should make the
ir_raw_event_store_with_filter the default submit function for all
drivers, and then I could drop that silly '_with_filter" thing
(Couldn't think for a better name for this function...)

> 
> > Now lirc bridge ensures proper gap handling.
> > Extend lirc bridge for carrier & timeout reports
> > 
> > Note: all new ir_raw_event variables now should be initialized
> > like that:
> > struct ir_raw_event ev = ir_new_event;
> 
> Wouldn't DEFINE_RAW_EVENT(ev); be more in line with the kernel coding 
> style? (cf. DEFINE_MUTEX, DEFINE_SPINLOCK, etc).
Of course, nothing against that.


Best regards,
Maxim Levitsky

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Re: [PATCH 6/7] IR: extend ir_raw_event and do refactoring

[David Härdeman]

On Fri, Sep 03, 2010 at 12:20:54AM +0300, Maxim Levitsky wrote:
> Also in the future I think I should make the
> ir_raw_event_store_with_filter the default submit function for all
> drivers, and then I could drop that silly '_with_filter" thing
> (Couldn't think for a better name for this function...)

I agree. Perhaps it would even be possible to merge 
ir_raw_event_store_with_filter and ir_raw_event_store. The automatic 
merger of consecutive pulse-pulse events or space-space events should 
help simplify some drivers...

> > Wouldn't DEFINE_RAW_EVENT(ev); be more in line with the kernel 
> > coding style? (cf. DEFINE_MUTEX, DEFINE_SPINLOCK, etc).
> Of course, nothing against that.

DEFINE_RC_RAW_EVENT() is probably better by the way...

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[PATCH 7/7] ENE: add support for carrier reports

[Maxim Levitsky]

Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
---
 drivers/media/IR/ene_ir.c |   47 +++++++++++++++++++++++++++++++++++---------
 1 files changed, 37 insertions(+), 10 deletions(-)

diff --git a/drivers/media/IR/ene_ir.c b/drivers/media/IR/ene_ir.c
index c7bbbca..dfb822b 100644
--- a/drivers/media/IR/ene_ir.c
+++ b/drivers/media/IR/ene_ir.c
@@ -224,6 +224,7 @@ void ene_rx_sense_carrier(struct ene_device *dev)
 {
 	int period = ene_read_reg(dev, ENE_CIRCAR_PRD);
 	int hperiod = ene_read_reg(dev, ENE_CIRCAR_HPRD);
+	struct ir_raw_event ev = ir_new_event;
 	int carrier, duty_cycle;
 
 
@@ -238,19 +239,23 @@ void ene_rx_sense_carrier(struct ene_device *dev)
 	dbg("RX: hardware carrier period = %02x", period);
 	dbg("RX: hardware carrier pulse period = %02x", hperiod);
 
-
 	carrier = 2000000 / period;
 	duty_cycle = (hperiod * 100) / period;
 	dbg("RX: sensed carrier = %d Hz, duty cycle %d%%",
-							carrier, duty_cycle);
-
-	/* TODO: Send carrier & duty cycle to IR layer */
+						carrier, duty_cycle);
+	if (dev->carrier_detect_enabled) {
+		ev.carrier_report = true;
+		ev.carrier = carrier;
+		ev.duty_cycle = duty_cycle;
+		ir_raw_event_store(dev->idev, &ev);
+	}
 }
 
 /* determine which input to use*/
 static void ene_rx_set_inputs(struct ene_device *dev)
 {
-	int learning_mode = dev->learning_enabled;
+	int learning_mode = dev->learning_enabled ||
+					dev->carrier_detect_enabled;
 
 	dbg("RX: setup receiver, learning mode = %d", learning_mode);
 
@@ -281,9 +286,17 @@ static void ene_rx_set_inputs(struct ene_device *dev)
 		ene_enable_cir_engine(dev, true);
 		ene_select_rx_input(dev, !dev->hw_use_gpio_0a);
 
-		/* Enable carrier detection & demodulation */
+		/* Enable demodulation */
 		ene_set_reg_mask(dev, ENE_CIRCFG, ENE_CIRCFG_CARR_DEMOD);
-		ene_set_reg_mask(dev, ENE_CIRCFG2, ENE_CIRCFG2_CARR_DETECT);
+
+		/* Enable carrier detect if asked to */
+		if (dev->carrier_detect_enabled || debug)
+			ene_set_reg_mask(dev, ENE_CIRCFG2,
+						ENE_CIRCFG2_CARR_DETECT);
+		else
+			ene_clear_reg_mask(dev, ENE_CIRCFG2,
+						ENE_CIRCFG2_CARR_DETECT);
+
 
 
 	/* disable learning mode */
@@ -726,7 +739,7 @@ static irqreturn_t ene_isr(int irq, void *data)
 
 	dbg_verbose("RX interrupt");
 
-	if (dev->carrier_detect_enabled || debug)
+	if (dev->hw_learning_and_tx_capable)
 		ene_rx_sense_carrier(dev);
 
 	/* On hardware that don't support extra buffer we need to trust
@@ -796,7 +809,6 @@ static void ene_setup_settings(struct ene_device *dev)
 		let user set it with LIRC_SET_REC_CARRIER */
 	dev->learning_enabled =
 		(learning_mode && dev->hw_learning_and_tx_capable);
-
 }
 
 /* outside interface: called on first open*/
@@ -902,6 +914,21 @@ static int ene_set_learning_mode(void *data, int enable)
 	return 0;
 }
 
+static int ene_set_carrier_report(void *data, int enable)
+{
+	struct ene_device *dev = (struct ene_device *)data;
+	unsigned long flags;
+
+	if (enable == dev->carrier_detect_enabled)
+		return 0;
+
+	spin_lock_irqsave(&dev->hw_lock, flags);
+	dev->carrier_detect_enabled = enable;
+	ene_rx_set_inputs(dev);
+	spin_unlock_irqrestore(&dev->hw_lock, flags);
+	return 0;
+}
+
 /* outside interface: enable or disable idle mode */
 static void ene_rx_set_idle(void *data, int idle)
 {
@@ -1043,7 +1070,7 @@ static int ene_probe(struct pnp_dev *pnp_dev, const struct pnp_device_id *id)
 		ir_props->s_tx_carrier = ene_set_tx_carrier;
 		ir_props->s_tx_duty_cycle = ene_set_tx_duty_cycle;
 		ir_props->tx_resolution = sample_period * 1000;
-		/* ir_props->s_carrier_report = ene_set_carrier_report; */
+		ir_props->s_carrier_report = ene_set_carrier_report;
 	}
 
 
-- 
1.7.0.4