V4L/DVB (4018): Usbvideo/quickcam_messenger driver v4l

Adds a usbvideo driver for the Logitech Quickcam Messenger USB webcam.
Signed-off-by: NJaya Kumar <jayakumar.video@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/usbvideo/Kconfig

@@ -36,3 +36,15 @@ config USB_KONICAWC
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called konicawc.
+
+config USB_QUICKCAM_MESSENGER
+	tristate "USB Logitech Quickcam Messenger"
+	depends on USB && VIDEO_DEV
+	select VIDEO_USBVIDEO
+	---help---
+	  Say Y or M here to enable support for the USB Logitech Quickcam
+	  Messenger webcam.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called quickcam_messenger.
+

drivers/media/video/usbvideo/Makefile

@@ -2,3 +2,4 @@ obj-$(CONFIG_VIDEO_USBVIDEO)    += usbvideo.o
 obj-$(CONFIG_USB_IBMCAM)        += ibmcam.o ultracam.o
 obj-$(CONFIG_USB_KONICAWC)      += konicawc.o
 obj-$(CONFIG_USB_VICAM)         += vicam.o
+obj-$(CONFIG_USB_QUICKCAM_MESSENGER)	+= quickcam_messenger.o

drivers/media/video/usbvideo/quickcam_messenger.h

+#ifndef quickcam_messenger_h
+#define quickcam_messenger_h
+
+#ifndef CONFIG_INPUT
+/* if we're not using input we dummy out these functions */
+#define qcm_register_input(...)
+#define qcm_unregister_input(...)
+#define qcm_report_buttonstat(...)
+#define qcm_setup_input_int(...) 0
+#define qcm_stop_int_data(...)
+#define qcm_alloc_int_urb(...) 0
+#define qcm_free_int(...)
+#endif
+
+
+#define CHECK_RET(ret, expr) \
+	if ((ret = expr) < 0) return ret
+
+/* Control Registers for the STVV6422 ASIC
+ * - this define is taken from the qc-usb-messenger code
+ */
+#define STV_ISO_ENABLE		0x1440
+#define ISOC_PACKET_SIZE	1023
+
+/* Chip identification number including revision indicator */
+#define CMOS_SENSOR_IDREV	0xE00A
+
+struct rgb {
+	u8 b;
+	u8 g;
+	u8 r;
+	u8 b2;
+	u8 g2;
+	u8 r2;
+};
+
+struct bayL0 {
+#ifdef __BIG_ENDIAN
+	u8 r;
+	u8 g;
+#elif __LITTLE_ENDIAN
+	u8 g;
+	u8 r;
+#else
+#error not byte order defined
+#endif
+};
+
+struct bayL1 {
+#ifdef __BIG_ENDIAN
+	u8 g;
+	u8 b;
+#elif __LITTLE_ENDIAN
+	u8 b;
+	u8 g;
+#else
+#error not byte order defined
+#endif
+};
+
+struct cam_size {
+	u16	width;
+	u16	height;
+	u8	cmd;
+};
+
+static const struct cam_size camera_sizes[] = {
+	{ 160, 120, 0xf },
+	{ 320, 240, 0x2 },
+};
+
+enum frame_sizes {
+	SIZE_160X120	= 0,
+	SIZE_320X240	= 1,
+};
+
+#define MAX_FRAME_SIZE SIZE_320X240
+
+struct qcm {
+	u16 colour;
+	u16 hue;
+	u16 brightness;
+	u16 contrast;
+	u16 whiteness;
+
+	u8 size;
+	int height;
+	int width;
+	u8 *scratch;
+	struct urb *button_urb;
+	u8 button_sts;
+	u8 button_sts_buf;
+
+#ifdef CONFIG_INPUT
+	struct input_dev *input;
+	char input_physname[64];
+#endif
+};
+
+struct regval {
+	u16 reg;
+	u8 val;
+};
+/* this table is derived from the
+qc-usb-messenger code */
+static const struct regval regval_table[] = {
+	{ STV_ISO_ENABLE, 0x00 },
+	{ 0x1436, 0x00 }, { 0x1432, 0x03 },
+	{ 0x143a, 0xF9 }, { 0x0509, 0x38 },
+	{ 0x050a, 0x38 }, { 0x050b, 0x38 },
+	{ 0x050c, 0x2A }, { 0x050d, 0x01 },
+	{ 0x1431, 0x00 }, { 0x1433, 0x34 },
+	{ 0x1438, 0x18 }, { 0x1439, 0x00 },
+	{ 0x143b, 0x05 }, { 0x143c, 0x00 },
+	{ 0x143e, 0x01 }, { 0x143d, 0x00 },
+	{ 0x1442, 0xe2 }, { 0x1500, 0xd0 },
+	{ 0x1500, 0xd0 }, { 0x1500, 0x50 },
+	{ 0x1501, 0xaf }, { 0x1502, 0xc2 },
+	{ 0x1503, 0x45 }, { 0x1505, 0x02 },
+	{ 0x150e, 0x8e }, { 0x150f, 0x37 },
+	{ 0x15c0, 0x00 },
+};
+
+static const unsigned char marker[] = { 0x00, 0xff, 0x00, 0xFF };
+
+#endif /* quickcam_messenger_h */