[media] usbvision: add Nogatech USB MicroCam

Add Nogatech USB MicroCam PAL (NV3001P) and NTSC (NV3000N) support to
usbvision driver.
PAL version is tested, NTSC untested.
Data captured using usbsnoop, init_values are listed in the INF file along
with image dimensions, offsets and frame rates.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 72 insertions, 1 deletions

diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c
index c8feb0d6fccf..89ac46277031 100644
--- a/drivers/media/video/usbvision/usbvision-core.c
+++ b/drivers/media/video/usbvision/usbvision-core.c
@@ -1679,6 +1679,55 @@ int usbvision_power_off(struct usb_usbvision *usbvision)
 	return err_code;
 }
 
+/* configure webcam image sensor using the serial port */
+static int usbvision_init_webcam(struct usb_usbvision *usbvision)
+{
+	int rc;
+	int i;
+	static char init_values[38][3] = {
+		{ 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
+		{ 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
+		{ 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
+		{ 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
+		{ 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
+		{ 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
+		{ 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
+		{ 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
+		{ 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
+		{ 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
+	};
+	char value[3];
+
+	/* the only difference between PAL and NTSC init_values */
+	if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
+		init_values[4][1] = 0x34;
+
+	for (i = 0; i < sizeof(init_values) / 3; i++) {
+		usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
+		memcpy(value, init_values[i], 3);
+		rc = usb_control_msg(usbvision->dev,
+				     usb_sndctrlpipe(usbvision->dev, 1),
+				     USBVISION_OP_CODE,
+				     USB_DIR_OUT | USB_TYPE_VENDOR |
+				     USB_RECIP_ENDPOINT, 0,
+				     (__u16) USBVISION_SER_DAT1, value,
+				     3, HZ);
+		if (rc < 0)
+			return rc;
+		usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
+		/* write 3 bytes to the serial port using SIO mode */
+		usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
+		usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
+		usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
+		usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
+		usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
+		usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
+		usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
+	}
+
+	return 0;
+}
+
 /*
  * usbvision_set_video_format()
  *
@@ -1797,6 +1846,13 @@ int usbvision_set_output(struct usb_usbvision *usbvision, int width,
 
 	frame_drop = FRAMERATE_MAX;	/* We can allow the maximum here, because dropping is controlled */
 
+	if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
+		if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
+			frame_drop = 25;
+		else
+			frame_drop = 30;
+	}
+
 	/* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
 		=> frame_skip = 4;
 		=> frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
@@ -2046,6 +2102,12 @@ int usbvision_set_input(struct usb_usbvision *usbvision)
 		value[7] = 0x00;	/* 0x0010 -> 16 Input video v offset */
 	}
 
+	/* webcam is only 480 pixels wide, both PAL and NTSC version */
+	if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
+		value[0] = 0xe0;
+		value[1] = 0x01;	/* 0x01E0 -> 480 Input video line length */
+	}
+
 	if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
 		value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
 		value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8;
@@ -2148,7 +2210,7 @@ static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
 			     (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
 
 	if (rc < 0) {
-		dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
+		dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
 		return rc;
 	}
 
@@ -2180,8 +2242,15 @@ int usbvision_power_on(struct usb_usbvision *usbvision)
 	usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 			USBVISION_SSPND_EN | USBVISION_RES2);
 
+	if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
+		usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
+				USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
+		usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
+				USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
+	}
 	usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 			USBVISION_SSPND_EN | USBVISION_PWR_VID);
+	mdelay(10);
 	err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
 			USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
 	if (err_code == 1)
@@ -2310,6 +2379,8 @@ int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
 
 int usbvision_setup(struct usb_usbvision *usbvision, int format)
 {
+	if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
+		usbvision_init_webcam(usbvision);
 	usbvision_set_video_format(usbvision, format);
 	usbvision_set_dram_settings(usbvision);
 	usbvision_set_compress_params(usbvision);