Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1002 insertions, 0 deletions

diff --git a/drivers/media/i2c/ir-kbd-i2c.c b/drivers/media/i2c/ir-kbd-i2c.c
new file mode 100644
index 0000000000..b37a2aaf8a
--- /dev/null
+++ b/drivers/media/i2c/ir-kbd-i2c.c
@@ -0,0 +1,1002 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *
+ * keyboard input driver for i2c IR remote controls
+ *
+ * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org>
+ * modified for PixelView (BT878P+W/FM) by
+ *      Michal Kochanowicz <mkochano@pld.org.pl>
+ *      Christoph Bartelmus <lirc@bartelmus.de>
+ * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
+ *      Ulrich Mueller <ulrich.mueller42@web.de>
+ * modified for em2820 based USB TV tuners by
+ *      Markus Rechberger <mrechberger@gmail.com>
+ * modified for DViCO Fusion HDTV 5 RT GOLD by
+ *      Chaogui Zhang <czhang1974@gmail.com>
+ * modified for MSI TV@nywhere Plus by
+ *      Henry Wong <henry@stuffedcow.net>
+ *      Mark Schultz <n9xmj@yahoo.com>
+ *      Brian Rogers <brian_rogers@comcast.net>
+ * modified for AVerMedia Cardbus by
+ *      Oldrich Jedlicka <oldium.pro@seznam.cz>
+ * Zilog Transmitter portions/ideas were derived from GPLv2+ sources:
+ *  - drivers/char/pctv_zilogir.[ch] from Hauppauge Broadway product
+ *	Copyright 2011 Hauppauge Computer works
+ *  - drivers/staging/media/lirc/lirc_zilog.c
+ *	Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
+ *	Michal Kochanowicz <mkochano@pld.org.pl>
+ *	Christoph Bartelmus <lirc@bartelmus.de>
+ *	Ulrich Mueller <ulrich.mueller42@web.de>
+ *	Stefan Jahn <stefan@lkcc.org>
+ *	Jerome Brock <jbrock@users.sourceforge.net>
+ *	Thomas Reitmayr (treitmayr@yahoo.com)
+ *	Mark Weaver <mark@npsl.co.uk>
+ *	Jarod Wilson <jarod@redhat.com>
+ *	Copyright (C) 2011 Andy Walls <awalls@md.metrocast.net>
+ */
+
+#include <asm/unaligned.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/workqueue.h>
+
+#include <media/rc-core.h>
+#include <media/i2c/ir-kbd-i2c.h>
+
+#define FLAG_TX		1
+#define FLAG_HDPVR	2
+
+static bool enable_hdpvr;
+module_param(enable_hdpvr, bool, 0644);
+
+static int get_key_haup_common(struct IR_i2c *ir, enum rc_proto *protocol,
+			       u32 *scancode, u8 *ptoggle, int size)
+{
+	unsigned char buf[6];
+	int start, range, toggle, dev, code, ircode, vendor;
+
+	/* poll IR chip */
+	if (size != i2c_master_recv(ir->c, buf, size))
+		return -EIO;
+
+	if (buf[0] & 0x80) {
+		int offset = (size == 6) ? 3 : 0;
+
+		/* split rc5 data block ... */
+		start  = (buf[offset] >> 7) &    1;
+		range  = (buf[offset] >> 6) &    1;
+		toggle = (buf[offset] >> 5) &    1;
+		dev    =  buf[offset]       & 0x1f;
+		code   = (buf[offset+1] >> 2) & 0x3f;
+
+		/* rc5 has two start bits
+		 * the first bit must be one
+		 * the second bit defines the command range:
+		 * 1 = 0-63, 0 = 64 - 127
+		 */
+		if (!start)
+			/* no key pressed */
+			return 0;
+
+		/* filter out invalid key presses */
+		ircode = (start << 12) | (toggle << 11) | (dev << 6) | code;
+		if ((ircode & 0x1fff) == 0x1fff)
+			return 0;
+
+		if (!range)
+			code += 64;
+
+		dev_dbg(&ir->rc->dev,
+			"ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n",
+			start, range, toggle, dev, code);
+
+		*protocol = RC_PROTO_RC5;
+		*scancode = RC_SCANCODE_RC5(dev, code);
+		*ptoggle = toggle;
+
+		return 1;
+	} else if (size == 6 && (buf[0] & 0x40)) {
+		code = buf[4];
+		dev = buf[3];
+		vendor = get_unaligned_be16(buf + 1);
+
+		if (vendor == 0x800f) {
+			*ptoggle = (dev & 0x80) != 0;
+			*protocol = RC_PROTO_RC6_MCE;
+			dev &= 0x7f;
+			dev_dbg(&ir->rc->dev,
+				"ir hauppauge (rc6-mce): t%d vendor=%d dev=%d code=%d\n",
+				*ptoggle, vendor, dev, code);
+		} else {
+			*ptoggle = 0;
+			*protocol = RC_PROTO_RC6_6A_32;
+			dev_dbg(&ir->rc->dev,
+				"ir hauppauge (rc6-6a-32): vendor=%d dev=%d code=%d\n",
+				vendor, dev, code);
+		}
+
+		*scancode = RC_SCANCODE_RC6_6A(vendor, dev, code);
+
+		return 1;
+	}
+
+	return 0;
+}
+
+static int get_key_haup(struct IR_i2c *ir, enum rc_proto *protocol,
+			u32 *scancode, u8 *toggle)
+{
+	return get_key_haup_common(ir, protocol, scancode, toggle, 3);
+}
+
+static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_proto *protocol,
+			    u32 *scancode, u8 *toggle)
+{
+	int ret;
+	unsigned char buf[1] = { 0 };
+
+	/*
+	 * This is the same apparent "are you ready?" poll command observed
+	 * watching Windows driver traffic and implemented in lirc_zilog. With
+	 * this added, we get far saner remote behavior with z8 chips on usb
+	 * connected devices, even with the default polling interval of 100ms.
+	 */
+	ret = i2c_master_send(ir->c, buf, 1);
+	if (ret != 1)
+		return (ret < 0) ? ret : -EINVAL;
+
+	return get_key_haup_common(ir, protocol, scancode, toggle, 6);
+}
+
+static int get_key_pixelview(struct IR_i2c *ir, enum rc_proto *protocol,
+			     u32 *scancode, u8 *toggle)
+{
+	int rc;
+	unsigned char b;
+
+	/* poll IR chip */
+	rc = i2c_master_recv(ir->c, &b, 1);
+	if (rc != 1) {
+		dev_dbg(&ir->rc->dev, "read error\n");
+		if (rc < 0)
+			return rc;
+		return -EIO;
+	}
+
+	*protocol = RC_PROTO_OTHER;
+	*scancode = b;
+	*toggle = 0;
+	return 1;
+}
+
+static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_proto *protocol,
+			      u32 *scancode, u8 *toggle)
+{
+	int rc;
+	unsigned char buf[4];
+
+	/* poll IR chip */
+	rc = i2c_master_recv(ir->c, buf, 4);
+	if (rc != 4) {
+		dev_dbg(&ir->rc->dev, "read error\n");
+		if (rc < 0)
+			return rc;
+		return -EIO;
+	}
+
+	if (buf[0] != 0 || buf[1] != 0 || buf[2] != 0 || buf[3] != 0)
+		dev_dbg(&ir->rc->dev, "%s: %*ph\n", __func__, 4, buf);
+
+	/* no key pressed or signal from other ir remote */
+	if(buf[0] != 0x1 ||  buf[1] != 0xfe)
+		return 0;
+
+	*protocol = RC_PROTO_UNKNOWN;
+	*scancode = buf[2];
+	*toggle = 0;
+	return 1;
+}
+
+static int get_key_knc1(struct IR_i2c *ir, enum rc_proto *protocol,
+			u32 *scancode, u8 *toggle)
+{
+	int rc;
+	unsigned char b;
+
+	/* poll IR chip */
+	rc = i2c_master_recv(ir->c, &b, 1);
+	if (rc != 1) {
+		dev_dbg(&ir->rc->dev, "read error\n");
+		if (rc < 0)
+			return rc;
+		return -EIO;
+	}
+
+	/* it seems that 0xFE indicates that a button is still hold
+	   down, while 0xff indicates that no button is hold
+	   down. 0xfe sequences are sometimes interrupted by 0xFF */
+
+	dev_dbg(&ir->rc->dev, "key %02x\n", b);
+
+	if (b == 0xff)
+		return 0;
+
+	if (b == 0xfe)
+		/* keep old data */
+		return 1;
+
+	*protocol = RC_PROTO_UNKNOWN;
+	*scancode = b;
+	*toggle = 0;
+	return 1;
+}
+
+static int get_key_geniatech(struct IR_i2c *ir, enum rc_proto *protocol,
+			     u32 *scancode, u8 *toggle)
+{
+	int i, rc;
+	unsigned char b;
+
+	/* poll IR chip */
+	for (i = 0; i < 4; i++) {
+		rc = i2c_master_recv(ir->c, &b, 1);
+		if (rc == 1)
+			break;
+		msleep(20);
+	}
+	if (rc != 1) {
+		dev_dbg(&ir->rc->dev, "read error\n");
+		if (rc < 0)
+			return rc;
+		return -EIO;
+	}
+
+	/* don't repeat the key */
+	if (ir->old == b)
+		return 0;
+	ir->old = b;
+
+	/* decode to RC5 */
+	b &= 0x7f;
+	b = (b - 1) / 2;
+
+	dev_dbg(&ir->rc->dev, "key %02x\n", b);
+
+	*protocol = RC_PROTO_RC5;
+	*scancode = b;
+	*toggle = ir->old >> 7;
+	return 1;
+}
+
+static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_proto *protocol,
+				     u32 *scancode, u8 *toggle)
+{
+	unsigned char subaddr, key, keygroup;
+	struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0,
+				   .buf = &subaddr, .len = 1},
+				 { .addr = ir->c->addr, .flags = I2C_M_RD,
+				  .buf = &key, .len = 1} };
+	subaddr = 0x0d;
+	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
+		dev_dbg(&ir->rc->dev, "read error\n");
+		return -EIO;
+	}
+
+	if (key == 0xff)
+		return 0;
+
+	subaddr = 0x0b;
+	msg[1].buf = &keygroup;
+	if (2 != i2c_transfer(ir->c->adapter, msg, 2)) {
+		dev_dbg(&ir->rc->dev, "read error\n");
+		return -EIO;
+	}
+
+	if (keygroup == 0xff)
+		return 0;
+
+	dev_dbg(&ir->rc->dev, "read key 0x%02x/0x%02x\n", key, keygroup);
+	if (keygroup < 2 || keygroup > 4) {
+		dev_warn(&ir->rc->dev, "warning: invalid key group 0x%02x for key 0x%02x\n",
+			 keygroup, key);
+	}
+	key |= (keygroup & 1) << 6;
+
+	*protocol = RC_PROTO_UNKNOWN;
+	*scancode = key;
+	if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */
+		*scancode |= keygroup << 8;
+	*toggle = 0;
+	return 1;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int ir_key_poll(struct IR_i2c *ir)
+{
+	enum rc_proto protocol;
+	u32 scancode;
+	u8 toggle;
+	int rc;
+
+	dev_dbg(&ir->rc->dev, "%s\n", __func__);
+	rc = ir->get_key(ir, &protocol, &scancode, &toggle);
+	if (rc < 0) {
+		dev_warn(&ir->rc->dev, "error %d\n", rc);
+		return rc;
+	}
+
+	if (rc) {
+		dev_dbg(&ir->rc->dev, "%s: proto = 0x%04x, scancode = 0x%08x\n",
+			__func__, protocol, scancode);
+		rc_keydown(ir->rc, protocol, scancode, toggle);
+	}
+	return 0;
+}
+
+static void ir_work(struct work_struct *work)
+{
+	int rc;
+	struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work);
+
+	/*
+	 * If the transmit code is holding the lock, skip polling for
+	 * IR, we'll get it to it next time round
+	 */
+	if (mutex_trylock(&ir->lock)) {
+		rc = ir_key_poll(ir);
+		mutex_unlock(&ir->lock);
+		if (rc == -ENODEV) {
+			rc_unregister_device(ir->rc);
+			ir->rc = NULL;
+			return;
+		}
+	}
+
+	schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval));
+}
+
+static int ir_open(struct rc_dev *dev)
+{
+	struct IR_i2c *ir = dev->priv;
+
+	schedule_delayed_work(&ir->work, 0);
+
+	return 0;
+}
+
+static void ir_close(struct rc_dev *dev)
+{
+	struct IR_i2c *ir = dev->priv;
+
+	cancel_delayed_work_sync(&ir->work);
+}
+
+/* Zilog Transmit Interface */
+#define XTAL_FREQ		18432000
+
+#define ZILOG_SEND		0x80
+#define ZILOG_UIR_END		0x40
+#define ZILOG_INIT_END		0x20
+#define ZILOG_LIR_END		0x10
+
+#define ZILOG_STATUS_OK		0x80
+#define ZILOG_STATUS_TX		0x40
+#define ZILOG_STATUS_SET	0x20
+
+/*
+ * As you can see here, very few different lengths of pulse and space
+ * can be encoded. This means that the hardware does not work well with
+ * recorded IR. It's best to work with generated IR, like from ir-ctl or
+ * the in-kernel encoders.
+ */
+struct code_block {
+	u8	length;
+	u16	pulse[7];	/* not aligned */
+	u8	carrier_pulse;
+	u8	carrier_space;
+	u16	space[8];	/* not aligned */
+	u8	codes[61];
+	u8	csum[2];
+} __packed;
+
+static int send_data_block(struct IR_i2c *ir, int cmd,
+			   struct code_block *code_block)
+{
+	int i, j, ret;
+	u8 buf[5], *p;
+
+	p = &code_block->length;
+	for (i = 0; p < code_block->csum; i++)
+		code_block->csum[i & 1] ^= *p++;
+
+	p = &code_block->length;
+
+	for (i = 0; i < sizeof(*code_block);) {
+		int tosend = sizeof(*code_block) - i;
+
+		if (tosend > 4)
+			tosend = 4;
+		buf[0] = i + 1;
+		for (j = 0; j < tosend; ++j)
+			buf[1 + j] = p[i + j];
+		dev_dbg(&ir->rc->dev, "%*ph", tosend + 1, buf);
+		ret = i2c_master_send(ir->tx_c, buf, tosend + 1);
+		if (ret != tosend + 1) {
+			dev_dbg(&ir->rc->dev,
+				"i2c_master_send failed with %d\n", ret);
+			return ret < 0 ? ret : -EIO;
+		}
+		i += tosend;
+	}
+
+	buf[0] = 0;
+	buf[1] = cmd;
+	ret = i2c_master_send(ir->tx_c, buf, 2);
+	if (ret != 2) {
+		dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret);
+		return ret < 0 ? ret : -EIO;
+	}
+
+	usleep_range(2000, 5000);
+
+	ret = i2c_master_send(ir->tx_c, buf, 1);
+	if (ret != 1) {
+		dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret);
+		return ret < 0 ? ret : -EIO;
+	}
+
+	return 0;
+}
+
+static int zilog_init(struct IR_i2c *ir)
+{
+	struct code_block code_block = { .length = sizeof(code_block) };
+	u8 buf[4];
+	int ret;
+
+	put_unaligned_be16(0x1000, &code_block.pulse[3]);
+
+	ret = send_data_block(ir, ZILOG_INIT_END, &code_block);
+	if (ret)
+		return ret;
+
+	ret = i2c_master_recv(ir->tx_c, buf, 4);
+	if (ret != 4) {
+		dev_err(&ir->c->dev, "failed to retrieve firmware version: %d\n",
+			ret);
+		return ret < 0 ? ret : -EIO;
+	}
+
+	dev_info(&ir->c->dev, "Zilog/Hauppauge IR blaster firmware version %d.%d.%d\n",
+		 buf[1], buf[2], buf[3]);
+
+	return 0;
+}
+
+/*
+ * If the last slot for pulse is the same as the current slot for pulse,
+ * then use slot no 7.
+ */
+static void copy_codes(u8 *dst, u8 *src, unsigned int count)
+{
+	u8 c, last = 0xff;
+
+	while (count--) {
+		c = *src++;
+		if ((c & 0xf0) == last) {
+			*dst++ = 0x70 | (c & 0xf);
+		} else {
+			*dst++ = c;
+			last = c & 0xf0;
+		}
+	}
+}
+
+/*
+ * When looking for repeats, we don't care about the trailing space. This
+ * is set to the shortest possible anyway.
+ */
+static int cmp_no_trail(u8 *a, u8 *b, unsigned int count)
+{
+	while (--count) {
+		if (*a++ != *b++)
+			return 1;
+	}
+
+	return (*a & 0xf0) - (*b & 0xf0);
+}
+
+static int find_slot(u16 *array, unsigned int size, u16 val)
+{
+	int i;
+
+	for (i = 0; i < size; i++) {
+		if (get_unaligned_be16(&array[i]) == val) {
+			return i;
+		} else if (!array[i]) {
+			put_unaligned_be16(val, &array[i]);
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+static int zilog_ir_format(struct rc_dev *rcdev, unsigned int *txbuf,
+			   unsigned int count, struct code_block *code_block)
+{
+	struct IR_i2c *ir = rcdev->priv;
+	int rep, i, l, p = 0, s, c = 0;
+	bool repeating;
+	u8 codes[174];
+
+	code_block->carrier_pulse = DIV_ROUND_CLOSEST(
+			ir->duty_cycle * XTAL_FREQ / 1000, ir->carrier);
+	code_block->carrier_space = DIV_ROUND_CLOSEST(
+			(100 - ir->duty_cycle) * XTAL_FREQ / 1000, ir->carrier);
+
+	for (i = 0; i < count; i++) {
+		if (c >= ARRAY_SIZE(codes) - 1) {
+			dev_warn(&rcdev->dev, "IR too long, cannot transmit\n");
+			return -EINVAL;
+		}
+
+		/*
+		 * Lengths more than 142220us cannot be encoded; also
+		 * this checks for multiply overflow
+		 */
+		if (txbuf[i] > 142220)
+			return -EINVAL;
+
+		l = DIV_ROUND_CLOSEST((XTAL_FREQ / 1000) * txbuf[i], 40000);
+
+		if (i & 1) {
+			s = find_slot(code_block->space,
+				      ARRAY_SIZE(code_block->space), l);
+			if (s == -1) {
+				dev_warn(&rcdev->dev, "Too many different lengths spaces, cannot transmit");
+				return -EINVAL;
+			}
+
+			/* We have a pulse and space */
+			codes[c++] = (p << 4) | s;
+		} else {
+			p = find_slot(code_block->pulse,
+				      ARRAY_SIZE(code_block->pulse), l);
+			if (p == -1) {
+				dev_warn(&rcdev->dev, "Too many different lengths pulses, cannot transmit");
+				return -EINVAL;
+			}
+		}
+	}
+
+	/* We have to encode the trailing pulse. Find the shortest space */
+	s = 0;
+	for (i = 1; i < ARRAY_SIZE(code_block->space); i++) {
+		u16 d = get_unaligned_be16(&code_block->space[i]);
+
+		if (get_unaligned_be16(&code_block->space[s]) > d)
+			s = i;
+	}
+
+	codes[c++] = (p << 4) | s;
+
+	dev_dbg(&rcdev->dev, "generated %d codes\n", c);
+
+	/*
+	 * Are the last N codes (so pulse + space) repeating 3 times?
+	 * if so we can shorten the codes list and use code 0xc0 to repeat
+	 * them.
+	 */
+	repeating = false;
+
+	for (rep = c / 3; rep >= 1; rep--) {
+		if (!memcmp(&codes[c - rep * 3], &codes[c - rep * 2], rep) &&
+		    !cmp_no_trail(&codes[c - rep], &codes[c - rep * 2], rep)) {
+			repeating = true;
+			break;
+		}
+	}
+
+	if (repeating) {
+		/* first copy any leading non-repeating */
+		int leading = c - rep * 3;
+
+		if (leading >= ARRAY_SIZE(code_block->codes) - 3 - rep) {
+			dev_warn(&rcdev->dev, "IR too long, cannot transmit\n");
+			return -EINVAL;
+		}
+
+		dev_dbg(&rcdev->dev, "found trailing %d repeat\n", rep);
+		copy_codes(code_block->codes, codes, leading);
+		code_block->codes[leading] = 0x82;
+		copy_codes(code_block->codes + leading + 1, codes + leading,
+			   rep);
+		c = leading + 1 + rep;
+		code_block->codes[c++] = 0xc0;
+	} else {
+		if (c >= ARRAY_SIZE(code_block->codes) - 3) {
+			dev_warn(&rcdev->dev, "IR too long, cannot transmit\n");
+			return -EINVAL;
+		}
+
+		dev_dbg(&rcdev->dev, "found no trailing repeat\n");
+		code_block->codes[0] = 0x82;
+		copy_codes(code_block->codes + 1, codes, c);
+		c++;
+		code_block->codes[c++] = 0xc4;
+	}
+
+	while (c < ARRAY_SIZE(code_block->codes))
+		code_block->codes[c++] = 0x83;
+
+	return 0;
+}
+
+static int zilog_tx(struct rc_dev *rcdev, unsigned int *txbuf,
+		    unsigned int count)
+{
+	struct IR_i2c *ir = rcdev->priv;
+	struct code_block code_block = { .length = sizeof(code_block) };
+	u8 buf[2];
+	int ret, i;
+
+	ret = zilog_ir_format(rcdev, txbuf, count, &code_block);
+	if (ret)
+		return ret;
+
+	ret = mutex_lock_interruptible(&ir->lock);
+	if (ret)
+		return ret;
+
+	ret = send_data_block(ir, ZILOG_UIR_END, &code_block);
+	if (ret)
+		goto out_unlock;
+
+	ret = i2c_master_recv(ir->tx_c, buf, 1);
+	if (ret != 1) {
+		dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret);
+		goto out_unlock;
+	}
+
+	dev_dbg(&ir->rc->dev, "code set status: %02x\n", buf[0]);
+
+	if (buf[0] != (ZILOG_STATUS_OK | ZILOG_STATUS_SET)) {
+		dev_err(&ir->rc->dev, "unexpected IR TX response %02x\n",
+			buf[0]);
+		ret = -EIO;
+		goto out_unlock;
+	}
+
+	buf[0] = 0x00;
+	buf[1] = ZILOG_SEND;
+
+	ret = i2c_master_send(ir->tx_c, buf, 2);
+	if (ret != 2) {
+		dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret);
+		if (ret >= 0)
+			ret = -EIO;
+		goto out_unlock;
+	}
+
+	dev_dbg(&ir->rc->dev, "send command sent\n");
+
+	/*
+	 * This bit NAKs until the device is ready, so we retry it
+	 * sleeping a bit each time.  This seems to be what the windows
+	 * driver does, approximately.
+	 * Try for up to 1s.
+	 */
+	for (i = 0; i < 20; ++i) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(msecs_to_jiffies(50));
+		ret = i2c_master_send(ir->tx_c, buf, 1);
+		if (ret == 1)
+			break;
+		dev_dbg(&ir->rc->dev,
+			"NAK expected: i2c_master_send failed with %d (try %d)\n",
+			ret, i + 1);
+	}
+
+	if (ret != 1) {
+		dev_err(&ir->rc->dev,
+			"IR TX chip never got ready: last i2c_master_send failed with %d\n",
+			ret);
+		if (ret >= 0)
+			ret = -EIO;
+		goto out_unlock;
+	}
+
+	ret = i2c_master_recv(ir->tx_c, buf, 1);
+	if (ret != 1) {
+		dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret);
+		ret = -EIO;
+		goto out_unlock;
+	} else if (buf[0] != ZILOG_STATUS_OK) {
+		dev_err(&ir->rc->dev, "unexpected IR TX response #2: %02x\n",
+			buf[0]);
+		ret = -EIO;
+		goto out_unlock;
+	}
+	dev_dbg(&ir->rc->dev, "transmit complete\n");
+
+	/* Oh good, it worked */
+	ret = count;
+out_unlock:
+	mutex_unlock(&ir->lock);
+
+	return ret;
+}
+
+static int zilog_tx_carrier(struct rc_dev *dev, u32 carrier)
+{
+	struct IR_i2c *ir = dev->priv;
+
+	if (carrier > 500000 || carrier < 20000)
+		return -EINVAL;
+
+	ir->carrier = carrier;
+
+	return 0;
+}
+
+static int zilog_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle)
+{
+	struct IR_i2c *ir = dev->priv;
+
+	ir->duty_cycle = duty_cycle;
+
+	return 0;
+}
+
+static int ir_probe(struct i2c_client *client)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(client);
+	char *ir_codes = NULL;
+	const char *name = NULL;
+	u64 rc_proto = RC_PROTO_BIT_UNKNOWN;
+	struct IR_i2c *ir;
+	struct rc_dev *rc = NULL;
+	struct i2c_adapter *adap = client->adapter;
+	unsigned short addr = client->addr;
+	bool probe_tx = (id->driver_data & FLAG_TX) != 0;
+	int err;
+
+	if ((id->driver_data & FLAG_HDPVR) && !enable_hdpvr) {
+		dev_err(&client->dev, "IR for HDPVR is known to cause problems during recording, use enable_hdpvr modparam to enable\n");
+		return -ENODEV;
+	}
+
+	ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL);
+	if (!ir)
+		return -ENOMEM;
+
+	ir->c = client;
+	ir->polling_interval = DEFAULT_POLLING_INTERVAL;
+	i2c_set_clientdata(client, ir);
+
+	switch(addr) {
+	case 0x64:
+		name        = "Pixelview";
+		ir->get_key = get_key_pixelview;
+		rc_proto    = RC_PROTO_BIT_OTHER;
+		ir_codes    = RC_MAP_EMPTY;
+		break;
+	case 0x18:
+	case 0x1f:
+	case 0x1a:
+		name        = "Hauppauge";
+		ir->get_key = get_key_haup;
+		rc_proto    = RC_PROTO_BIT_RC5;
+		ir_codes    = RC_MAP_HAUPPAUGE;
+		break;
+	case 0x30:
+		name        = "KNC One";
+		ir->get_key = get_key_knc1;
+		rc_proto    = RC_PROTO_BIT_OTHER;
+		ir_codes    = RC_MAP_EMPTY;
+		break;
+	case 0x33:
+		name        = "Geniatech";
+		ir->get_key = get_key_geniatech;
+		rc_proto    = RC_PROTO_BIT_RC5;
+		ir_codes    = RC_MAP_TOTAL_MEDIA_IN_HAND_02;
+		ir->old     = 0xfc;
+		break;
+	case 0x6b:
+		name        = "FusionHDTV";
+		ir->get_key = get_key_fusionhdtv;
+		rc_proto    = RC_PROTO_BIT_UNKNOWN;
+		ir_codes    = RC_MAP_FUSIONHDTV_MCE;
+		break;
+	case 0x40:
+		name        = "AVerMedia Cardbus remote";
+		ir->get_key = get_key_avermedia_cardbus;
+		rc_proto    = RC_PROTO_BIT_OTHER;
+		ir_codes    = RC_MAP_AVERMEDIA_CARDBUS;
+		break;
+	case 0x41:
+		name        = "AVerMedia EM78P153";
+		ir->get_key = get_key_avermedia_cardbus;
+		rc_proto    = RC_PROTO_BIT_OTHER;
+		/* RM-KV remote, seems to be same as RM-K6 */
+		ir_codes    = RC_MAP_AVERMEDIA_M733A_RM_K6;
+		break;
+	case 0x71:
+		name        = "Hauppauge/Zilog Z8";
+		ir->get_key = get_key_haup_xvr;
+		rc_proto    = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE |
+							RC_PROTO_BIT_RC6_6A_32;
+		ir_codes    = RC_MAP_HAUPPAUGE;
+		ir->polling_interval = 125;
+		probe_tx = true;
+		break;
+	}
+
+	/* Let the caller override settings */
+	if (client->dev.platform_data) {
+		const struct IR_i2c_init_data *init_data =
+						client->dev.platform_data;
+
+		ir_codes = init_data->ir_codes;
+		rc = init_data->rc_dev;
+
+		name = init_data->name;
+		if (init_data->type)
+			rc_proto = init_data->type;
+
+		if (init_data->polling_interval)
+			ir->polling_interval = init_data->polling_interval;
+
+		switch (init_data->internal_get_key_func) {
+		case IR_KBD_GET_KEY_CUSTOM:
+			/* The bridge driver provided us its own function */
+			ir->get_key = init_data->get_key;
+			break;
+		case IR_KBD_GET_KEY_PIXELVIEW:
+			ir->get_key = get_key_pixelview;
+			break;
+		case IR_KBD_GET_KEY_HAUP:
+			ir->get_key = get_key_haup;
+			break;
+		case IR_KBD_GET_KEY_KNC1:
+			ir->get_key = get_key_knc1;
+			break;
+		case IR_KBD_GET_KEY_GENIATECH:
+			ir->get_key = get_key_geniatech;
+			break;
+		case IR_KBD_GET_KEY_FUSIONHDTV:
+			ir->get_key = get_key_fusionhdtv;
+			break;
+		case IR_KBD_GET_KEY_HAUP_XVR:
+			ir->get_key = get_key_haup_xvr;
+			break;
+		case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS:
+			ir->get_key = get_key_avermedia_cardbus;
+			break;
+		}
+	}
+
+	if (!rc) {
+		/*
+		 * If platform_data doesn't specify rc_dev, initialize it
+		 * internally
+		 */
+		rc = rc_allocate_device(RC_DRIVER_SCANCODE);
+		if (!rc)
+			return -ENOMEM;
+	}
+	ir->rc = rc;
+
+	/* Make sure we are all setup before going on */
+	if (!name || !ir->get_key || !rc_proto || !ir_codes) {
+		dev_warn(&client->dev, "Unsupported device at address 0x%02x\n",
+			 addr);
+		err = -ENODEV;
+		goto err_out_free;
+	}
+
+	ir->ir_codes = ir_codes;
+
+	snprintf(ir->phys, sizeof(ir->phys), "%s/%s", dev_name(&adap->dev),
+		 dev_name(&client->dev));
+
+	/*
+	 * Initialize input_dev fields
+	 * It doesn't make sense to allow overriding them via platform_data
+	 */
+	rc->input_id.bustype = BUS_I2C;
+	rc->input_phys       = ir->phys;
+	rc->device_name	     = name;
+	rc->dev.parent       = &client->dev;
+	rc->priv             = ir;
+	rc->open             = ir_open;
+	rc->close            = ir_close;
+
+	/*
+	 * Initialize the other fields of rc_dev
+	 */
+	rc->map_name       = ir->ir_codes;
+	rc->allowed_protocols = rc_proto;
+	if (!rc->driver_name)
+		rc->driver_name = KBUILD_MODNAME;
+
+	mutex_init(&ir->lock);
+
+	INIT_DELAYED_WORK(&ir->work, ir_work);
+
+	if (probe_tx) {
+		ir->tx_c = i2c_new_dummy_device(client->adapter, 0x70);
+		if (IS_ERR(ir->tx_c)) {
+			dev_err(&client->dev, "failed to setup tx i2c address");
+			err = PTR_ERR(ir->tx_c);
+			goto err_out_free;
+		} else if (!zilog_init(ir)) {
+			ir->carrier = 38000;
+			ir->duty_cycle = 40;
+			rc->tx_ir = zilog_tx;
+			rc->s_tx_carrier = zilog_tx_carrier;
+			rc->s_tx_duty_cycle = zilog_tx_duty_cycle;
+		}
+	}
+
+	err = rc_register_device(rc);
+	if (err)
+		goto err_out_free;
+
+	return 0;
+
+ err_out_free:
+	if (!IS_ERR(ir->tx_c))
+		i2c_unregister_device(ir->tx_c);
+
+	/* Only frees rc if it were allocated internally */
+	rc_free_device(rc);
+	return err;
+}
+
+static void ir_remove(struct i2c_client *client)
+{
+	struct IR_i2c *ir = i2c_get_clientdata(client);
+
+	cancel_delayed_work_sync(&ir->work);
+
+	i2c_unregister_device(ir->tx_c);
+
+	rc_unregister_device(ir->rc);
+}
+
+static const struct i2c_device_id ir_kbd_id[] = {
+	/* Generic entry for any IR receiver */
+	{ "ir_video", 0 },
+	/* IR device specific entries should be added here */
+	{ "ir_z8f0811_haup", FLAG_TX },
+	{ "ir_z8f0811_hdpvr", FLAG_TX | FLAG_HDPVR },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, ir_kbd_id);
+
+static struct i2c_driver ir_kbd_driver = {
+	.driver = {
+		.name   = "ir-kbd-i2c",
+	},
+	.probe          = ir_probe,
+	.remove         = ir_remove,
+	.id_table       = ir_kbd_id,
+};
+
+module_i2c_driver(ir_kbd_driver);
+
+/* ----------------------------------------------------------------------- */
+
+MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller");
+MODULE_DESCRIPTION("input driver for i2c IR remote controls");
+MODULE_LICENSE("GPL");