V4L/DVB (11096): V4L2 Driver for the Hauppauge HD PVR usb capture device

The device encodes component video up to 1080i to a MPEG-TS stream with
H.264 video and stereo AAC audio. Newer firmwares accept also AC3
(up to 5.1) audio over optical SPDIF without reencoding.
Firmware upgrade is unimplemeted but rather unimportant since
the firmware sits on a flash chip.

The I2C adapter to drive the integrated infrared receiver/sender is
currently disabled due to a conflict with cx18-based devices.

Tested-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 145 insertions, 0 deletions

diff --git a/drivers/media/video/hdpvr/hdpvr-i2c.c b/drivers/media/video/hdpvr/hdpvr-i2c.c
new file mode 100644
index 00000000000..35096dec241
--- /dev/null
+++ b/drivers/media/video/hdpvr/hdpvr-i2c.c
@@ -0,0 +1,145 @@
+
+/*
+ * Hauppage HD PVR USB driver
+ *
+ * Copyright (C) 2008      Janne Grunau (j@jannau.net)
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License as
+ *	published by the Free Software Foundation, version 2.
+ *
+ */
+
+#include <linux/i2c.h>
+
+#include "hdpvr.h"
+
+#define CTRL_READ_REQUEST	0xb8
+#define CTRL_WRITE_REQUEST	0x38
+
+#define REQTYPE_I2C_READ	0xb1
+#define REQTYPE_I2C_WRITE	0xb0
+#define REQTYPE_I2C_WRITE_STATT	0xd0
+
+static int hdpvr_i2c_read(struct hdpvr_device *dev, unsigned char addr,
+			  char *data, int len)
+{
+	int ret;
+	char *buf = kmalloc(len, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = usb_control_msg(dev->udev,
+			      usb_rcvctrlpipe(dev->udev, 0),
+			      REQTYPE_I2C_READ, CTRL_READ_REQUEST,
+			      0x100|addr, 0, buf, len, 1000);
+
+	if (ret == len) {
+		memcpy(data, buf, len);
+		ret = 0;
+	} else if (ret >= 0)
+		ret = -EIO;
+
+	kfree(buf);
+
+	return ret;
+}
+
+static int hdpvr_i2c_write(struct hdpvr_device *dev, unsigned char addr,
+			   char *data, int len)
+{
+	int ret;
+	char *buf = kmalloc(len, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	memcpy(buf, data, len);
+	ret = usb_control_msg(dev->udev,
+			      usb_sndctrlpipe(dev->udev, 0),
+			      REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST,
+			      0x100|addr, 0, buf, len, 1000);
+
+	if (ret < 0)
+		goto error;
+
+	ret = usb_control_msg(dev->udev,
+			      usb_rcvctrlpipe(dev->udev, 0),
+			      REQTYPE_I2C_WRITE_STATT, CTRL_READ_REQUEST,
+			      0, 0, buf, 2, 1000);
+
+	if (ret == 2)
+		ret = 0;
+	else if (ret >= 0)
+		ret = -EIO;
+
+error:
+	kfree(buf);
+	return ret;
+}
+
+static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs,
+			  int num)
+{
+	struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter);
+	int retval = 0, i, addr;
+
+	if (num <= 0)
+		return 0;
+
+	mutex_lock(&dev->i2c_mutex);
+
+	for (i = 0; i < num && !retval; i++) {
+		addr = msgs[i].addr << 1;
+
+		if (msgs[i].flags & I2C_M_RD)
+			retval = hdpvr_i2c_read(dev, addr, msgs[i].buf,
+						msgs[i].len);
+		else
+			retval = hdpvr_i2c_write(dev, addr, msgs[i].buf,
+						 msgs[i].len);
+	}
+
+	mutex_unlock(&dev->i2c_mutex);
+
+	return retval ? retval : num;
+}
+
+static u32 hdpvr_functionality(struct i2c_adapter *adapter)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static struct i2c_algorithm hdpvr_algo = {
+	.master_xfer   = hdpvr_transfer,
+	.functionality = hdpvr_functionality,
+};
+
+int hdpvr_register_i2c_adapter(struct hdpvr_device *dev)
+{
+	struct i2c_adapter *i2c_adap;
+	int retval = -ENOMEM;
+
+	i2c_adap = kzalloc(sizeof(struct i2c_adapter), GFP_KERNEL);
+	if (i2c_adap == NULL)
+		goto error;
+
+	strlcpy(i2c_adap->name, "Hauppauge HD PVR I2C",
+		sizeof(i2c_adap->name));
+	i2c_adap->algo  = &hdpvr_algo;
+	i2c_adap->class = I2C_CLASS_TV_ANALOG;
+	i2c_adap->id    = I2C_HW_B_HDPVR;
+	i2c_adap->owner = THIS_MODULE;
+	i2c_adap->dev.parent = &dev->udev->dev;
+
+	i2c_set_adapdata(i2c_adap, dev);
+
+	retval = i2c_add_adapter(i2c_adap);
+
+	if (!retval)
+		dev->i2c_adapter = i2c_adap;
+	else
+		kfree(i2c_adap);
+
+error:
+	return retval;
+}