Release 4.7 drivers/media/usb/em28xx/em28xx-video.c

Directory: drivers/media/usb/em28xx
/*
   em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
                    video capture devices

   Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
                      Markus Rechberger <mrechberger@gmail.com>
                      Mauro Carvalho Chehab <mchehab@infradead.org>
                      Sascha Sommer <saschasommer@freenet.de>
   Copyright (C) 2012 Frank SchÃ¤fer <fschaefer.oss@googlemail.com>

        Some parts based on SN9C10x PC Camera Controllers GPL driver made
                by Luca Risolia <luca.risolia@studio.unibo.it>

   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; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitmap.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/slab.h>

#include "em28xx.h"
#include "em28xx-v4l.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <media/v4l2-clk.h>
#include <media/drv-intf/msp3400.h>
#include <media/tuner.h>


#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
                      "Markus Rechberger <mrechberger@gmail.com>, " \
                      "Mauro Carvalho Chehab <mchehab@infradead.org>, " \
                      "Sascha Sommer <saschasommer@freenet.de>"


static unsigned int isoc_debug;
module_param(isoc_debug, int, 0644);
MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");


static unsigned int disable_vbi;
module_param(disable_vbi, int, 0644);
MODULE_PARM_DESC(disable_vbi, "disable vbi support");


static int alt;
module_param(alt, int, 0644);
MODULE_PARM_DESC(alt, "alternate setting to use for video endpoint");


#define em28xx_videodbg(fmt, arg...) do {\
        if (video_debug) \
                printk(KERN_INFO "%s %s :"fmt, \
                         dev->name, __func__ , ##arg); } while (0)


#define em28xx_isocdbg(fmt, arg...) \
do {\
        if (isoc_debug) { \
                printk(KERN_INFO "%s %s :"fmt, \
                         dev->name, __func__ , ##arg); \
        } \
  } while (0)


MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC " - v4l2 interface");
MODULE_LICENSE("GPL");

MODULE_VERSION(EM28XX_VERSION);


#define EM25XX_FRMDATAHDR_BYTE1			0x02

#define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE	0x20

#define EM25XX_FRMDATAHDR_BYTE2_FRAME_END	0x02

#define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID	0x01

#define EM25XX_FRMDATAHDR_BYTE2_MASK	(EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
                                         EM25XX_FRMDATAHDR_BYTE2_FRAME_END |   \
                                         EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)


static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };

static unsigned int vbi_nr[]   = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };

static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };

module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr, int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr,   "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");


static unsigned int video_debug;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");

/* supported video standards */

static struct em28xx_fmt format[] = {
	{
		.name     = "16 bpp YUY2, 4:2:2, packed",
		.fourcc   = V4L2_PIX_FMT_YUYV,
		.depth    = 16,
		.reg	  = EM28XX_OUTFMT_YUV422_Y0UY1V,
        }, {
		.name     = "16 bpp RGB 565, LE",
		.fourcc   = V4L2_PIX_FMT_RGB565,
		.depth    = 16,
		.reg      = EM28XX_OUTFMT_RGB_16_656,
        }, {
		.name     = "8 bpp Bayer BGBG..GRGR",
		.fourcc   = V4L2_PIX_FMT_SBGGR8,
		.depth    = 8,
		.reg      = EM28XX_OUTFMT_RGB_8_BGBG,
        }, {
		.name     = "8 bpp Bayer GRGR..BGBG",
		.fourcc   = V4L2_PIX_FMT_SGRBG8,
		.depth    = 8,
		.reg      = EM28XX_OUTFMT_RGB_8_GRGR,
        }, {
		.name     = "8 bpp Bayer GBGB..RGRG",
		.fourcc   = V4L2_PIX_FMT_SGBRG8,
		.depth    = 8,
		.reg      = EM28XX_OUTFMT_RGB_8_GBGB,
        }, {
		.name     = "12 bpp YUV411",
		.fourcc   = V4L2_PIX_FMT_YUV411P,
		.depth    = 12,
		.reg      = EM28XX_OUTFMT_YUV411,
        },
};

/*FIXME: maxw should be dependent of alt mode */


static inline unsigned int norm_maxw(struct em28xx *dev)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	if (dev->board.is_webcam)
		return v4l2->sensor_xres;

	if (dev->board.max_range_640_480)
		return 640;

	return 720;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 49 100.00% 2 100.00%
Total 49 100.00% 2 100.00%



static inline unsigned int norm_maxh(struct em28xx *dev)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	if (dev->board.is_webcam)
		return v4l2->sensor_yres;

	if (dev->board.max_range_640_480)
		return 480;

	return (v4l2->norm & V4L2_STD_625_50) ? 576 : 480;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 59 100.00% 3 100.00%
Total 59 100.00% 3 100.00%



static int em28xx_vbi_supported(struct em28xx *dev)
{
	/* Modprobe option to manually disable */
	if (disable_vbi == 1)
		return 0;

	if (dev->board.is_webcam)
		return 0;

	/* FIXME: check subdevices for VBI support */

	if (dev->chip_id == CHIP_ID_EM2860 ||
	    dev->chip_id == CHIP_ID_EM2883)
		return 1;

	/* Version of em28xx that does not support VBI */
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 54 100.00% 2 100.00%
Total 54 100.00% 2 100.00%

/*
 * em28xx_wake_i2c()
 * configure i2c attached devices
 */


static void em28xx_wake_i2c(struct em28xx *dev)
{
	struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;

	v4l2_device_call_all(v4l2_dev, 0, core,  reset, 0);
	v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
			     INPUT(dev->ctl_input)->vmux, 0, 0);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 35 58.33% 5 62.50%
frank schaefer frank schaefer 11 18.33% 1 12.50%
andrew morton andrew morton 8 13.33% 1 12.50%
devin heitmueller devin heitmueller 6 10.00% 1 12.50%
Total 60 100.00% 8 100.00%



static int em28xx_colorlevels_set_default(struct em28xx *dev)
{
	em28xx_write_reg(dev, EM28XX_R20_YGAIN, CONTRAST_DEFAULT);
	em28xx_write_reg(dev, EM28XX_R21_YOFFSET, BRIGHTNESS_DEFAULT);
	em28xx_write_reg(dev, EM28XX_R22_UVGAIN, SATURATION_DEFAULT);
	em28xx_write_reg(dev, EM28XX_R23_UOFFSET, BLUE_BALANCE_DEFAULT);
	em28xx_write_reg(dev, EM28XX_R24_VOFFSET, RED_BALANCE_DEFAULT);
	em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, SHARPNESS_DEFAULT);

	em28xx_write_reg(dev, EM28XX_R14_GAMMA, 0x20);
	em28xx_write_reg(dev, EM28XX_R15_RGAIN, 0x20);
	em28xx_write_reg(dev, EM28XX_R16_GGAIN, 0x20);
	em28xx_write_reg(dev, EM28XX_R17_BGAIN, 0x20);
	em28xx_write_reg(dev, EM28XX_R18_ROFFSET, 0x00);
	em28xx_write_reg(dev, EM28XX_R19_GOFFSET, 0x00);
	return em28xx_write_reg(dev, EM28XX_R1A_BOFFSET, 0x00);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 123 95.35% 3 75.00%
andrew morton andrew morton 6 4.65% 1 25.00%
Total 129 100.00% 4 100.00%



static int em28xx_set_outfmt(struct em28xx *dev)
{
	int ret;
	u8 fmt, vinctrl;
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	fmt = v4l2->format->reg;
	if (!dev->is_em25xx)
		fmt |= 0x20;
	/*
         * NOTE: it's not clear if this is really needed !
         * The datasheets say bit 5 is a reserved bit and devices seem to work
         * fine without it. But the Windows driver sets it for em2710/50+em28xx
         * devices and we've always been setting it, too.
         *
         * em2765 (em25xx, em276x/7x/8x) devices do NOT work with this bit set,
         * it's likely used for an additional (compressed ?) format there.
         */
	ret = em28xx_write_reg(dev, EM28XX_R27_OUTFMT, fmt);
	if (ret < 0)
		return ret;

	ret = em28xx_write_reg(dev, EM28XX_R10_VINMODE, v4l2->vinmode);
	if (ret < 0)
		return ret;

	vinctrl = v4l2->vinctl;
	if (em28xx_vbi_supported(dev) == 1) {
		vinctrl |= EM28XX_VINCTRL_VBI_RAW;
		em28xx_write_reg(dev, EM28XX_R34_VBI_START_H, 0x00);
		em28xx_write_reg(dev, EM28XX_R36_VBI_WIDTH, v4l2->vbi_width/4);
		em28xx_write_reg(dev, EM28XX_R37_VBI_HEIGHT, v4l2->vbi_height);
		if (v4l2->norm & V4L2_STD_525_60) {
			/* NTSC */
			em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x09);
		} else if (v4l2->norm & V4L2_STD_625_50) {
			/* PAL */
			em28xx_write_reg(dev, EM28XX_R35_VBI_START_V, 0x07);
		}
	}

	return em28xx_write_reg(dev, EM28XX_R11_VINCTRL, vinctrl);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 168 86.15% 6 46.15%
frank schaefer frank schaefer 18 9.23% 5 38.46%
andrew morton andrew morton 5 2.56% 1 7.69%
hans verkuil hans verkuil 4 2.05% 1 7.69%
Total 195 100.00% 13 100.00%



static int em28xx_accumulator_set(struct em28xx *dev, u8 xmin, u8 xmax,
				  u8 ymin, u8 ymax)
{
	em28xx_videodbg("em28xx Scale: (%d,%d)-(%d,%d)\n",
			xmin, ymin, xmax, ymax);

	em28xx_write_regs(dev, EM28XX_R28_XMIN, &xmin, 1);
	em28xx_write_regs(dev, EM28XX_R29_XMAX, &xmax, 1);
	em28xx_write_regs(dev, EM28XX_R2A_YMIN, &ymin, 1);
	return em28xx_write_regs(dev, EM28XX_R2B_YMAX, &ymax, 1);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 85 100.00% 1 100.00%
Total 85 100.00% 1 100.00%



static void em28xx_capture_area_set(struct em28xx *dev, u8 hstart, u8 vstart,
				    u16 width, u16 height)
{
	u8 cwidth = width >> 2;
	u8 cheight = height >> 2;
	u8 overflow = (height >> 9 & 0x02) | (width >> 10 & 0x01);
	/* NOTE: size limit: 2047x1023 = 2MPix */

	em28xx_videodbg("capture area set to (%d,%d): %dx%d\n",
			hstart, vstart,
		       ((overflow & 2) << 9 | cwidth << 2),
		       ((overflow & 1) << 10 | cheight << 2));

	em28xx_write_regs(dev, EM28XX_R1C_HSTART, &hstart, 1);
	em28xx_write_regs(dev, EM28XX_R1D_VSTART, &vstart, 1);
	em28xx_write_regs(dev, EM28XX_R1E_CWIDTH, &cwidth, 1);
	em28xx_write_regs(dev, EM28XX_R1F_CHEIGHT, &cheight, 1);
	em28xx_write_regs(dev, EM28XX_R1B_OFLOW, &overflow, 1);

	/* FIXME: function/meaning of these registers ? */
	/* FIXME: align width+height to multiples of 4 ?! */
	if (dev->is_em25xx) {
		em28xx_write_reg(dev, 0x34, width >> 4);
		em28xx_write_reg(dev, 0x35, height >> 4);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 186 100.00% 1 100.00%
Total 186 100.00% 1 100.00%



static int em28xx_scaler_set(struct em28xx *dev, u16 h, u16 v)
{
	u8 mode = 0x00;
	/* the em2800 scaler only supports scaling down to 50% */

	if (dev->board.is_em2800) {
		mode = (v ? 0x20 : 0x00) | (h ? 0x10 : 0x00);
	} else {
		u8 buf[2];

		buf[0] = h;
		buf[1] = h >> 8;
		em28xx_write_regs(dev, EM28XX_R30_HSCALELOW, (char *)buf, 2);

		buf[0] = v;
		buf[1] = v >> 8;
		em28xx_write_regs(dev, EM28XX_R32_VSCALELOW, (char *)buf, 2);
		/* it seems that both H and V scalers must be active
                   to work correctly */
		mode = (h || v) ? 0x30 : 0x00;
	}
	return em28xx_write_reg(dev, EM28XX_R26_COMPR, mode);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 142 97.93% 1 50.00%
frank schaefer frank schaefer 3 2.07% 1 50.00%
Total 145 100.00% 2 100.00%

/* FIXME: this only function read values from dev */


static int em28xx_resolution_set(struct em28xx *dev)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	int width = norm_maxw(dev);
	int height = norm_maxh(dev);

	/* Properly setup VBI */
	v4l2->vbi_width = 720;
	if (v4l2->norm & V4L2_STD_525_60)
		v4l2->vbi_height = 12;
	else
		v4l2->vbi_height = 18;

	em28xx_set_outfmt(dev);

	em28xx_accumulator_set(dev, 1, (width - 4) >> 2, 1, (height - 4) >> 2);

	/* If we don't set the start position to 2 in VBI mode, we end up
           with line 20/21 being YUYV encoded instead of being in 8-bit
           greyscale.  The core of the issue is that line 21 (and line 23 for
           PAL WSS) are inside of active video region, and as a result they
           get the pixelformatting associated with that area.  So by cropping
           it out, we end up with the same format as the rest of the VBI
           region */
	if (em28xx_vbi_supported(dev) == 1)
		em28xx_capture_area_set(dev, 0, 2, width, height);
	else
		em28xx_capture_area_set(dev, 0, 0, width, height);

	return em28xx_scaler_set(dev, v4l2->hscale, v4l2->vscale);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 125 86.21% 2 50.00%
frank schaefer frank schaefer 20 13.79% 2 50.00%
Total 145 100.00% 4 100.00%

/* Set USB alternate setting for analog video */


static int em28xx_set_alternate(struct em28xx *dev)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	int errCode;
	int i;
	unsigned int min_pkt_size = v4l2->width * 2 + 4;

	/* NOTE: for isoc transfers, only alt settings > 0 are allowed
                 bulk transfers seem to work only with alt=0 ! */
	dev->alt = 0;
	if ((alt > 0) && (alt < dev->num_alt)) {
		em28xx_videodbg("alternate forced to %d\n", dev->alt);
		dev->alt = alt;
		goto set_alt;
	}
	if (dev->analog_xfer_bulk)
		goto set_alt;

	/* When image size is bigger than a certain value,
           the frame size should be increased, otherwise, only
           green screen will be received.
         */
	if (v4l2->width * 2 * v4l2->height > 720 * 240 * 2)
		min_pkt_size *= 2;

	for (i = 0; i < dev->num_alt; i++) {
		/* stop when the selected alt setting offers enough bandwidth */
		if (dev->alt_max_pkt_size_isoc[i] >= min_pkt_size) {
			dev->alt = i;
			break;
		/* otherwise make sure that we end up with the maximum bandwidth
                   because the min_pkt_size equation might be wrong...
                */
		} else if (dev->alt_max_pkt_size_isoc[i] >
			   dev->alt_max_pkt_size_isoc[dev->alt])
			dev->alt = i;
	}

set_alt:
	/* NOTE: for bulk transfers, we need to call usb_set_interface()
         * even if the previous settings were the same. Otherwise streaming
         * fails with all urbs having status = -EOVERFLOW ! */
	if (dev->analog_xfer_bulk) {
		dev->max_pkt_size = 512; /* USB 2.0 spec */
		dev->packet_multiplier = EM28XX_BULK_PACKET_MULTIPLIER;
	} else { /* isoc */
		em28xx_videodbg("minimum isoc packet size: %u (alt=%d)\n",
				min_pkt_size, dev->alt);
		dev->max_pkt_size =
				  dev->alt_max_pkt_size_isoc[dev->alt];
		dev->packet_multiplier = EM28XX_NUM_ISOC_PACKETS;
	}
	em28xx_videodbg("setting alternate %d with wMaxPacketSize=%u\n",
			dev->alt, dev->max_pkt_size);
	errCode = usb_set_interface(dev->udev, dev->ifnum, dev->alt);
	if (errCode < 0) {
		em28xx_errdev("cannot change alternate number to %d (error=%i)\n",
			      dev->alt, errCode);
		return errCode;
	}
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 275 94.83% 2 50.00%
frank schaefer frank schaefer 15 5.17% 2 50.00%
Total 290 100.00% 4 100.00%

/* ------------------------------------------------------------------
        DMA and thread functions
   ------------------------------------------------------------------*/

/*
 * Finish the current buffer
 */


static inline void finish_buffer(struct em28xx *dev,
				 struct em28xx_buffer *buf)
{
	em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);

	buf->vb.sequence = dev->v4l2->field_count++;
	if (dev->v4l2->progressive)
		buf->vb.field = V4L2_FIELD_NONE;
	else
		buf->vb.field = V4L2_FIELD_INTERLACED;
	buf->vb.vb2_buf.timestamp = ktime_get_ns();

	vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 63 70.79% 1 20.00%
frank schaefer frank schaefer 19 21.35% 2 40.00%
junghak sung junghak sung 7 7.87% 2 40.00%
Total 89 100.00% 5 100.00%

/*
 * Copy picture data from USB buffer to videobuf buffer
 */


static void em28xx_copy_video(struct em28xx *dev,
			      struct em28xx_buffer *buf,
			      unsigned char *usb_buf,
			      unsigned long len)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	void *fieldstart, *startwrite, *startread;
	int  linesdone, currlinedone, offset, lencopy, remain;
	int bytesperline = v4l2->width << 1;

	if (buf->pos + len > buf->length)
		len = buf->length - buf->pos;

	startread = usb_buf;
	remain = len;

	if (v4l2->progressive || buf->top_field)
		fieldstart = buf->vb_buf;
	else /* interlaced mode, even nr. of lines */
		fieldstart = buf->vb_buf + bytesperline;

	linesdone = buf->pos / bytesperline;
	currlinedone = buf->pos % bytesperline;

	if (v4l2->progressive)
		offset = linesdone * bytesperline + currlinedone;
	else
		offset = linesdone * bytesperline * 2 + currlinedone;

	startwrite = fieldstart + offset;
	lencopy = bytesperline - currlinedone;
	lencopy = lencopy > remain ? remain : lencopy;

	if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
		em28xx_isocdbg("Overflow of %zu bytes past buffer end (1)\n",
			       ((char *)startwrite + lencopy) -
			      ((char *)buf->vb_buf + buf->length));
		remain = (char *)buf->vb_buf + buf->length -
			 (char *)startwrite;
		lencopy = remain;
	}
	if (lencopy <= 0)
		return;
	memcpy(startwrite, startread, lencopy);

	remain -= lencopy;

	while (remain > 0) {
		if (v4l2->progressive)
			startwrite += lencopy;
		else
			startwrite += lencopy + bytesperline;
		startread += lencopy;
		if (bytesperline > remain)
			lencopy = remain;
		else
			lencopy = bytesperline;

		if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
		    buf->length) {
			em28xx_isocdbg("Overflow of %zu bytes past buffer end"
				       "(2)\n",
				       ((char *)startwrite + lencopy) -
				       ((char *)buf->vb_buf + buf->length));
			lencopy = remain = (char *)buf->vb_buf + buf->length -
				(char *)startwrite;
		}
		if (lencopy <= 0)
			break;

		memcpy(startwrite, startread, lencopy);

		remain -= lencopy;
	}

	buf->pos += len;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 237 55.63% 6 35.29%
aidan thornton aidan thornton 133 31.22% 2 11.76%
frank schaefer frank schaefer 43 10.09% 5 29.41%
devin heitmueller devin heitmueller 7 1.64% 2 11.76%
nicola soranzo nicola soranzo 4 0.94% 1 5.88%
hans verkuil hans verkuil 2 0.47% 1 5.88%
Total 426 100.00% 17 100.00%

/*
 * Copy VBI data from USB buffer to videobuf buffer
 */


static void em28xx_copy_vbi(struct em28xx *dev,
			    struct em28xx_buffer *buf,
			    unsigned char *usb_buf,
			    unsigned long len)
{
	unsigned int offset;

	if (buf->pos + len > buf->length)
		len = buf->length - buf->pos;

	offset = buf->pos;
	/* Make sure the bottom field populates the second half of the frame */
	if (buf->top_field == 0)
		offset += dev->v4l2->vbi_width * dev->v4l2->vbi_height;

	memcpy(buf->vb_buf + offset, usb_buf, len);
	buf->pos += len;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 81 81.82% 3 50.00%
frank schaefer frank schaefer 18 18.18% 3 50.00%
Total 99 100.00% 6 100.00%



static inline void print_err_status(struct em28xx *dev,
				    int packet, int status)
{
	char *errmsg = "Unknown";

	switch (status) {
	case -ENOENT:
		errmsg = "unlinked synchronuously";
		break;
	case -ECONNRESET:
		errmsg = "unlinked asynchronuously";
		break;
	case -ENOSR:
		errmsg = "Buffer error (overrun)";
		break;
	case -EPIPE:
		errmsg = "Stalled (device not responding)";
		break;
	case -EOVERFLOW:
		errmsg = "Babble (bad cable?)";
		break;
	case -EPROTO:
		errmsg = "Bit-stuff error (bad cable?)";
		break;
	case -EILSEQ:
		errmsg = "CRC/Timeout (could be anything)";
		break;
	case -ETIME:
		errmsg = "Device does not respond";
		break;
	}
	if (packet < 0) {
		em28xx_isocdbg("URB status %d [%s].\n",	status, errmsg);
	} else {
		em28xx_isocdbg("URB packet %d, status %d [%s].\n",
			       packet, status, errmsg);
	}
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 117 87.97% 3 75.00%
devin heitmueller devin heitmueller 16 12.03% 1 25.00%
Total 133 100.00% 4 100.00%

/*
 * get the next available buffer from dma queue
 */


static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
						 struct em28xx_dmaqueue *dma_q)
{
	struct em28xx_buffer *buf;

	if (list_empty(&dma_q->active)) {
		em28xx_isocdbg("No active queue to serve\n");
		return NULL;
	}

	/* Get the next buffer */
	buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
	/* Cleans up buffer - Useful for testing for frame/URB loss */
	list_del(&buf->list);
	buf->pos = 0;
	buf->vb_buf = buf->mem;

	return buf;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 51 58.62% 4 40.00%
frank schaefer frank schaefer 20 22.99% 3 30.00%
devin heitmueller devin heitmueller 15 17.24% 2 20.00%
lucas de marchi lucas de marchi 1 1.15% 1 10.00%
Total 87 100.00% 10 100.00%

/*
 * Finish the current buffer if completed and prepare for the next field
 */

static struct em28xx_buffer *

finish_field_prepare_next(struct em28xx *dev,
			  struct em28xx_buffer *buf,
			  struct em28xx_dmaqueue *dma_q)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	if (v4l2->progressive || v4l2->top_field) { /* Brand new frame */
		if (buf != NULL)
			finish_buffer(dev, buf);
		buf = get_next_buf(dev, dma_q);
	}
	if (buf != NULL) {
		buf->top_field = v4l2->top_field;
		buf->pos = 0;
	}

	return buf;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 92 100.00% 3 100.00%
Total 92 100.00% 3 100.00%

/*
 * Process data packet according to the em2710/em2750/em28xx frame data format
 */


static inline void process_frame_data_em28xx(struct em28xx *dev,
					     unsigned char *data_pkt,
					     unsigned int  data_len)
{
	struct em28xx_v4l2      *v4l2 = dev->v4l2;
	struct em28xx_buffer    *buf = dev->usb_ctl.vid_buf;
	struct em28xx_buffer    *vbi_buf = dev->usb_ctl.vbi_buf;
	struct em28xx_dmaqueue  *dma_q = &dev->vidq;
	struct em28xx_dmaqueue  *vbi_dma_q = &dev->vbiq;

	/* capture type 0 = vbi start
           capture type 1 = vbi in progress
           capture type 2 = video start
           capture type 3 = video in progress */
	if (data_len >= 4) {
		/* NOTE: Headers are always 4 bytes and
                 * never split across packets */
		if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
		    data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
			/* Continuation */
			data_pkt += 4;
			data_len -= 4;
		} else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
			/* Field start (VBI mode) */
			v4l2->capture_type = 0;
			v4l2->vbi_read = 0;
			em28xx_isocdbg("VBI START HEADER !!!\n");
			v4l2->top_field = !(data_pkt[2] & 1);
			data_pkt += 4;
			data_len -= 4;
		} else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
			/* Field start (VBI disabled) */
			v4l2->capture_type = 2;
			em28xx_isocdbg("VIDEO START HEADER !!!\n");
			v4l2->top_field = !(data_pkt[2] & 1);
			data_pkt += 4;
			data_len -= 4;
		}
	}
	/* NOTE: With bulk transfers, intermediate data packets
         * have no continuation header */

	if (v4l2->capture_type == 0) {
		vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
		dev->usb_ctl.vbi_buf = vbi_buf;
		v4l2->capture_type = 1;
	}

	if (v4l2->capture_type == 1) {
		int vbi_size = v4l2->vbi_width * v4l2->vbi_height;
		int vbi_data_len = ((v4l2->vbi_read + data_len) > vbi_size) ?
				   (vbi_size - v4l2->vbi_read) : data_len;

		/* Copy VBI data */
		if (vbi_buf != NULL)
			em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
		v4l2->vbi_read += vbi_data_len;

		if (vbi_data_len < data_len) {
			/* Continue with copying video data */
			v4l2->capture_type = 2;
			data_pkt += vbi_data_len;
			data_len -= vbi_data_len;
		}
	}

	if (v4l2->capture_type == 2) {
		buf = finish_field_prepare_next(dev, buf, dma_q);
		dev->usb_ctl.vid_buf = buf;
		v4l2->capture_type = 3;
	}

	if (v4l2->capture_type == 3 && buf != NULL && data_len > 0)
		em28xx_copy_video(dev, buf, data_pkt, data_len);
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 358 84.04% 5 35.71%
devin heitmueller devin heitmueller 27 6.34% 2 14.29%
mauro carvalho chehab mauro carvalho chehab 27 6.34% 2 14.29%
aidan thornton aidan thornton 9 2.11% 3 21.43%
andrew morton andrew morton 4 0.94% 1 7.14%
markus rechberger markus rechberger 1 0.23% 1 7.14%
Total 426 100.00% 14 100.00%

/*
 * Process data packet according to the em25xx/em276x/7x/8x frame data format
 */


static inline void process_frame_data_em25xx(struct em28xx *dev,
					     unsigned char *data_pkt,
					     unsigned int  data_len)
{
	struct em28xx_buffer    *buf = dev->usb_ctl.vid_buf;
	struct em28xx_dmaqueue  *dmaq = &dev->vidq;
	struct em28xx_v4l2      *v4l2 = dev->v4l2;
	bool frame_end = false;

	/* Check for header */
	/* NOTE: at least with bulk transfers, only the first packet
         * has a header and has always set the FRAME_END bit         */
	if (data_len >= 2) {	/* em25xx header is only 2 bytes long */
		if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
		    ((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
			v4l2->top_field = !(data_pkt[1] &
					   EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
			frame_end = data_pkt[1] &
				    EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
			data_pkt += 2;
			data_len -= 2;
		}

		/* Finish field and prepare next (BULK only) */
		if (dev->analog_xfer_bulk && frame_end) {
			buf = finish_field_prepare_next(dev, buf, dmaq);
			dev->usb_ctl.vid_buf = buf;
		}
		/* NOTE: in ISOC mode when a new frame starts and buf==NULL,
                 * we COULD already prepare a buffer here to avoid skipping the
                 * first frame.
                 */
	}

	/* Copy data */
	if (buf != NULL && data_len > 0)
		em28xx_copy_video(dev, buf, data_pkt, data_len);

	/* Finish frame (ISOC only) => avoids lag of 1 frame */
	if (!dev->analog_xfer_bulk && frame_end) {
		buf = finish_field_prepare_next(dev, buf, dmaq);
		dev->usb_ctl.vid_buf = buf;
	}

	/* NOTE: Tested with USB bulk transfers only !
         * The wording in the datasheet suggests that isoc might work different.
         * The current code assumes that with isoc transfers each packet has a
         * header like with the other em28xx devices.
         */
	/* NOTE: Support for interlaced mode is pure theory. It has not been
         * tested and it is unknown if these devices actually support it. */
	/* NOTE: No VBI support yet (these chips likely do not support VBI). */
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 211 99.53% 2 66.67%
mauro carvalho chehab mauro carvalho chehab 1 0.47% 1 33.33%
Total 212 100.00% 3 100.00%

/* Processes and copies the URB data content (video and VBI data) */


static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
{
	int xfer_bulk, num_packets, i;
	unsigned char *usb_data_pkt;
	unsigned int usb_data_len;

	if (!dev)
		return 0;

	if (dev->disconnected)
		return 0;

	if (urb->status < 0)
		print_err_status(dev, -1, urb->status);

	xfer_bulk = usb_pipebulk(urb->pipe);

	if (xfer_bulk) /* bulk */
		num_packets = 1;
	else /* isoc */
		num_packets = urb->number_of_packets;

	for (i = 0; i < num_packets; i++) {
		if (xfer_bulk) { /* bulk */
			usb_data_len = urb->actual_length;

			usb_data_pkt = urb->transfer_buffer;
		} else { /* isoc */
			if (urb->iso_frame_desc[i].status < 0) {
				print_err_status(dev, i,
						 urb->iso_frame_desc[i].status);
				if (urb->iso_frame_desc[i].status != -EPROTO)
					continue;
			}

			usb_data_len = urb->iso_frame_desc[i].actual_length;
			if (usb_data_len > dev->max_pkt_size) {
				em28xx_isocdbg("packet bigger than packet size");
				continue;
			}

			usb_data_pkt = urb->transfer_buffer +
				       urb->iso_frame_desc[i].offset;
		}

		if (usb_data_len == 0) {
			/* NOTE: happens very often with isoc transfers */
			/* em28xx_usbdbg("packet %d is empty",i); - spammy */
			continue;
		}

		if (dev->is_em25xx)
			process_frame_data_em25xx(dev,
						  usb_data_pkt, usb_data_len);
		else
			process_frame_data_em28xx(dev,
						  usb_data_pkt, usb_data_len);

	}
	return 1;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 163 62.45% 5 50.00%
mauro carvalho chehab mauro carvalho chehab 71 27.20% 3 30.00%
aidan thornton aidan thornton 21 8.05% 1 10.00%
andrew morton andrew morton 6 2.30% 1 10.00%
Total 261 100.00% 10 100.00%



static int get_ressource(enum v4l2_buf_type f_type)
{
	switch (f_type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
		return EM28XX_RESOURCE_VIDEO;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
		return EM28XX_RESOURCE_VBI;
	default:
		BUG();
	}
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 32 100.00% 1 100.00%
Total 32 100.00% 1 100.00%

/* Usage lock check functions */


static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
{
	int res_type = get_ressource(f_type);

	/* is it free? */
	if (dev->resources & res_type) {
		/* no, someone else uses it */
		return -EBUSY;
	}

	/* it's free, grab it */
	dev->resources |= res_type;
	em28xx_videodbg("res: get %d\n", res_type);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%



static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
{
	int res_type = get_ressource(f_type);

	dev->resources &= ~res_type;
	em28xx_videodbg("res: put %d\n", res_type);
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 37 100.00% 1 100.00%
Total 37 100.00% 1 100.00%



static void em28xx_v4l2_media_release(struct em28xx *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
	int i;

	for (i = 0; i < MAX_EM28XX_INPUT; i++) {
		if (!INPUT(i)->type)
			return;
		media_device_unregister_entity(&dev->input_ent[i]);
	}
#endif
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 56 100.00% 1 100.00%
Total 56 100.00% 1 100.00%

/*
 * Media Controller helper functions
 */



static int em28xx_enable_analog_tuner(struct em28xx *dev)
{
#ifdef CONFIG_MEDIA_CONTROLLER
	struct media_device *mdev = dev->media_dev;
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	struct media_entity *source;
	struct media_link *link, *found_link = NULL;
	int ret, active_links = 0;

	if (!mdev || !v4l2->decoder)
		return 0;

	/*
         * This will find the tuner that is connected into the decoder.
         * Technically, this is not 100% correct, as the device may be
         * using an analog input instead of the tuner. However, as we can't
         * do DVB streaming while the DMA engine is being used for V4L2,
         * this should be enough for the actual needs.
         */
	list_for_each_entry(link, &v4l2->decoder->links, list) {
		if (link->sink->entity == v4l2->decoder) {
			found_link = link;
			if (link->flags & MEDIA_LNK_FL_ENABLED)
				active_links++;
			break;
		}
	}

	if (active_links == 1 || !found_link)
		return 0;

	source = found_link->source->entity;
	list_for_each_entry(link, &source->links, list) {
		struct media_entity *sink;
		int flags = 0;

		sink = link->sink->entity;

		if (sink == v4l2->decoder)
			flags = MEDIA_LNK_FL_ENABLED;

		ret = media_entity_setup_link(link, flags);
		if (ret) {
			pr_err("Couldn't change link %s->%s to %s. Error %d\n",
			       source->name, sink->name,
			       flags ? "enabled" : "disabled",
			       ret);
			return ret;
		} else
			em28xx_videodbg("link %s->%s was %s\n",
					source->name, sink->name,
					flags ? "ENABLED" : "disabled");
	}
#endif
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 232 100.00% 1 100.00%
Total 232 100.00% 1 100.00%


static const char * const iname[] = {
	[EM28XX_VMUX_COMPOSITE]  = "Composite",
	[EM28XX_VMUX_SVIDEO]     = "S-Video",
	[EM28XX_VMUX_TELEVISION] = "Television",
	[EM28XX_RADIO]           = "Radio",
};



static void em28xx_v4l2_create_entities(struct em28xx *dev)
{
#if defined(CONFIG_MEDIA_CONTROLLER)
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	int ret, i;

	/* Initialize Video, VBI and Radio pads */
	v4l2->video_pad.flags = MEDIA_PAD_FL_SINK;
	ret = media_entity_pads_init(&v4l2->vdev.entity, 1, &v4l2->video_pad);
	if (ret < 0)
		pr_err("failed to initialize video media entity!\n");

	if (em28xx_vbi_supported(dev)) {
		v4l2->vbi_pad.flags = MEDIA_PAD_FL_SINK;
		ret = media_entity_pads_init(&v4l2->vbi_dev.entity, 1,
					     &v4l2->vbi_pad);
		if (ret < 0)
			pr_err("failed to initialize vbi media entity!\n");
	}

	/* Webcams don't have input connectors */
	if (dev->board.is_webcam)
		return;

	/* Create entities for each input connector */
	for (i = 0; i < MAX_EM28XX_INPUT; i++) {
		struct media_entity *ent = &dev->input_ent[i];

		if (!INPUT(i)->type)
			break;

		ent->name = iname[INPUT(i)->type];
		ent->flags = MEDIA_ENT_FL_CONNECTOR;
		dev->input_pad[i].flags = MEDIA_PAD_FL_SOURCE;

		switch (INPUT(i)->type) {
		case EM28XX_VMUX_COMPOSITE:
			ent->function = MEDIA_ENT_F_CONN_COMPOSITE;
			break;
		case EM28XX_VMUX_SVIDEO:
			ent->function = MEDIA_ENT_F_CONN_SVIDEO;
			break;
		default: /* EM28XX_VMUX_TELEVISION or EM28XX_RADIO */
			if (dev->tuner_type != TUNER_ABSENT)
				ent->function = MEDIA_ENT_F_CONN_RF;
			break;
		}

		ret = media_entity_pads_init(ent, 1, &dev->input_pad[i]);
		if (ret < 0)
			pr_err("failed to initialize input pad[%d]!\n", i);

		ret = media_device_register_entity(dev->media_dev, ent);
		if (ret < 0)
			pr_err("failed to register input entity %d!\n", i);
	}
#endif
}


Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 302 100.00% 2 100.00%
Total 302 100.00% 2 100.00%

/* ------------------------------------------------------------------
        Videobuf2 operations
   ------------------------------------------------------------------*/



static int queue_setup(struct vb2_queue *vq,
		       unsigned int *nbuffers, unsigned int *nplanes,
		       unsigned int sizes[], void *alloc_ctxs[])
{
	struct em28xx *dev = vb2_get_drv_priv(vq);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	unsigned long size =
		    (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;

	if (*nplanes)
		return sizes[0] < size ? -EINVAL : 0;
	*nplanes = 1;
	sizes[0] = size;

	em28xx_enable_analog_tuner(dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 33 29.46% 1 7.69%
mauro carvalho chehab mauro carvalho chehab 30 26.79% 6 46.15%
aidan thornton aidan thornton 22 19.64% 1 7.69%
hans verkuil hans verkuil 13 11.61% 1 7.69%
frank schaefer frank schaefer 12 10.71% 2 15.38%
douglas schilling landgraf douglas schilling landgraf 1 0.89% 1 7.69%
andrew morton andrew morton 1 0.89% 1 7.69%
Total 112 100.00% 13 100.00%


static int

buffer_prepare(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct em28xx        *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct em28xx_v4l2   *v4l2 = dev->v4l2;
	unsigned long size;

	em28xx_videodbg("%s, field=%d\n", __func__, vbuf->field);

	size = (v4l2->width * v4l2->height * v4l2->format->depth + 7) >> 3;

	if (vb2_plane_size(vb, 0) < size) {
		em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
				__func__, vb2_plane_size(vb, 0), size);
		return -EINVAL;
	}
	vb2_set_plane_payload(vb, 0, size);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 56 45.16% 1 11.11%
aidan thornton aidan thornton 25 20.16% 1 11.11%
mauro carvalho chehab mauro carvalho chehab 21 16.94% 4 44.44%
junghak sung junghak sung 11 8.87% 1 11.11%
frank schaefer frank schaefer 11 8.87% 2 22.22%
Total 124 100.00% 9 100.00%



int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
{
	struct em28xx *dev = vb2_get_drv_priv(vq);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	struct v4l2_frequency f;
	struct v4l2_fh *owner;
	int rc = 0;

	em28xx_videodbg("%s\n", __func__);

	/* Make sure streaming is not already in progress for this type
           of filehandle (e.g. video, vbi) */
	rc = res_get(dev, vq->type);
	if (rc)
		return rc;

	if (v4l2->streaming_users == 0) {
		/* First active streaming user, so allocate all the URBs */

		/* Allocate the USB bandwidth */
		em28xx_set_alternate(dev);

		/* Needed, since GPIO might have disabled power of
                   some i2c device
                */
		em28xx_wake_i2c(dev);

		v4l2->capture_type = -1;
		rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
					  dev->analog_xfer_bulk,
					  EM28XX_NUM_BUFS,
					  dev->max_pkt_size,
					  dev->packet_multiplier,
					  em28xx_urb_data_copy);
		if (rc < 0)
			return rc;

		/*
                 * djh: it's not clear whether this code is still needed.  I'm
                 * leaving it in here for now entirely out of concern for
                 * backward compatibility (the old code did it)
                 */

		/* Ask tuner to go to analog or radio mode */
		memset(&f, 0, sizeof(f));
		f.frequency = v4l2->frequency;
		owner = (struct v4l2_fh *)vq->owner;
		if (owner && owner->vdev->vfl_type == VFL_TYPE_RADIO)
			f.type = V4L2_TUNER_RADIO;
		else
			f.type = V4L2_TUNER_ANALOG_TV;
		v4l2_device_call_all(&v4l2->v4l2_dev,
				     0, tuner, s_frequency, &f);

		/* Enable video stream at TV decoder */
		v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 1);
	}

	v4l2->streaming_users++;

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 115 48.32% 1 5.56%
frank schaefer frank schaefer 38 15.97% 9 50.00%
aidan thornton aidan thornton 36 15.13% 2 11.11%
mauro carvalho chehab mauro carvalho chehab 27 11.34% 3 16.67%
junghak sung junghak sung 16 6.72% 1 5.56%
andrew morton andrew morton 4 1.68% 1 5.56%
gianluca gennari gianluca gennari 2 0.84% 1 5.56%
Total 238 100.00% 18 100.00%



static void em28xx_stop_streaming(struct vb2_queue *vq)
{
	struct em28xx *dev = vb2_get_drv_priv(vq);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	struct em28xx_dmaqueue *vidq = &dev->vidq;
	unsigned long flags = 0;

	em28xx_videodbg("%s\n", __func__);

	res_free(dev, vq->type);

	if (v4l2->streaming_users-- == 1) {
		/* Disable video stream at TV decoder */
		v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);

		/* Last active user, so shutdown all the URBS */
		em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
	}

	spin_lock_irqsave(&dev->slock, flags);
	if (dev->usb_ctl.vid_buf != NULL) {
		vb2_buffer_done(&dev->usb_ctl.vid_buf->vb.vb2_buf,
				VB2_BUF_STATE_ERROR);
		dev->usb_ctl.vid_buf = NULL;
	}
	while (!list_empty(&vidq->active)) {
		struct em28xx_buffer *buf;

		buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
		list_del(&buf->list);
		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
	}
	spin_unlock_irqrestore(&dev->slock, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 89 42.79% 1 9.09%
frank schaefer frank schaefer 44 21.15% 2 18.18%
mauro carvalho chehab mauro carvalho chehab 38 18.27% 4 36.36%
aidan thornton aidan thornton 25 12.02% 1 9.09%
andrew morton andrew morton 7 3.37% 1 9.09%
junghak sung junghak sung 4 1.92% 1 9.09%
hans verkuil hans verkuil 1 0.48% 1 9.09%
Total 208 100.00% 11 100.00%



void em28xx_stop_vbi_streaming(struct vb2_queue *vq)
{
	struct em28xx *dev = vb2_get_drv_priv(vq);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	struct em28xx_dmaqueue *vbiq = &dev->vbiq;
	unsigned long flags = 0;

	em28xx_videodbg("%s\n", __func__);

	res_free(dev, vq->type);

	if (v4l2->streaming_users-- == 1) {
		/* Disable video stream at TV decoder */
		v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_stream, 0);

		/* Last active user, so shutdown all the URBS */
		em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
	}

	spin_lock_irqsave(&dev->slock, flags);
	if (dev->usb_ctl.vbi_buf != NULL) {
		vb2_buffer_done(&dev->usb_ctl.vbi_buf->vb.vb2_buf,
				VB2_BUF_STATE_ERROR);
		dev->usb_ctl.vbi_buf = NULL;
	}
	while (!list_empty(&vbiq->active)) {
		struct em28xx_buffer *buf;

		buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
		list_del(&buf->list);
		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
	}
	spin_unlock_irqrestore(&dev->slock, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 87 42.03% 1 6.67%
mauro carvalho chehab mauro carvalho chehab 50 24.15% 5 33.33%
frank schaefer frank schaefer 44 21.26% 2 13.33%
douglas schilling landgraf douglas schilling landgraf 8 3.86% 2 13.33%
andrew morton andrew morton 7 3.38% 1 6.67%
hans verkuil hans verkuil 5 2.42% 2 13.33%
junghak sung junghak sung 4 1.93% 1 6.67%
vitaly wool vitaly wool 2 0.97% 1 6.67%
Total 207 100.00% 15 100.00%


static void

buffer_queue(struct vb2_buffer *vb)
{
	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
	struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
	struct em28xx_buffer *buf =
		container_of(vbuf, struct em28xx_buffer, vb);
	struct em28xx_dmaqueue *vidq = &dev->vidq;
	unsigned long flags = 0;

	em28xx_videodbg("%s\n", __func__);
	buf->mem = vb2_plane_vaddr(vb, 0);
	buf->length = vb2_plane_size(vb, 0);

	spin_lock_irqsave(&dev->slock, flags);
	list_add_tail(&buf->list, &vidq->active);
	spin_unlock_irqrestore(&dev->slock, flags);
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 96 76.19% 2 25.00%
mauro carvalho chehab mauro carvalho chehab 16 12.70% 4 50.00%
junghak sung junghak sung 11 8.73% 1 12.50%
andrew morton andrew morton 3 2.38% 1 12.50%
Total 126 100.00% 8 100.00%


static struct vb2_ops em28xx_video_qops = {
	.queue_setup    = queue_setup,
	.buf_prepare    = buffer_prepare,
	.buf_queue      = buffer_queue,
	.start_streaming = em28xx_start_analog_streaming,
	.stop_streaming = em28xx_stop_streaming,
	.wait_prepare   = vb2_ops_wait_prepare,
	.wait_finish    = vb2_ops_wait_finish,
};



static int em28xx_vb2_setup(struct em28xx *dev)
{
	int rc;
	struct vb2_queue *q;
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	/* Setup Videobuf2 for Video capture */
	q = &v4l2->vb_vidq;
	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
	q->drv_priv = dev;
	q->buf_struct_size = sizeof(struct em28xx_buffer);
	q->ops = &em28xx_video_qops;
	q->mem_ops = &vb2_vmalloc_memops;

	rc = vb2_queue_init(q);
	if (rc < 0)
		return rc;

	/* Setup Videobuf2 for VBI capture */
	q = &v4l2->vb_vbiq;
	q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
	q->drv_priv = dev;
	q->buf_struct_size = sizeof(struct em28xx_buffer);
	q->ops = &em28xx_vbi_qops;
	q->mem_ops = &vb2_vmalloc_memops;

	rc = vb2_queue_init(q);
	if (rc < 0)
		return rc;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 152 82.16% 2 20.00%
frank schaefer frank schaefer 21 11.35% 2 20.00%
mauro carvalho chehab mauro carvalho chehab 10 5.41% 5 50.00%
sakari ailus sakari ailus 2 1.08% 1 10.00%
Total 185 100.00% 10 100.00%

/*********************  v4l2 interface  **************************************/



static void video_mux(struct em28xx *dev, int index)
{
	struct v4l2_device *v4l2_dev = &dev->v4l2->v4l2_dev;

	dev->ctl_input = index;
	dev->ctl_ainput = INPUT(index)->amux;
	dev->ctl_aoutput = INPUT(index)->aout;

	if (!dev->ctl_aoutput)
		dev->ctl_aoutput = EM28XX_AOUT_MASTER;

	v4l2_device_call_all(v4l2_dev, 0, video, s_routing,
			     INPUT(index)->vmux, 0, 0);

	if (dev->board.has_msp34xx) {
		if (dev->i2s_speed) {
			v4l2_device_call_all(v4l2_dev, 0, audio,
					     s_i2s_clock_freq, dev->i2s_speed);
		}
		/* Note: this is msp3400 specific */
		v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
				     dev->ctl_ainput,
				     MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
	}

	if (dev->board.adecoder != EM28XX_NOADECODER) {
		v4l2_device_call_all(v4l2_dev, 0, audio, s_routing,
				     dev->ctl_ainput, dev->ctl_aoutput, 0);
	}

	em28xx_audio_analog_set(dev);
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 157 85.79% 1 25.00%
frank schaefer frank schaefer 12 6.56% 1 25.00%
hans verkuil hans verkuil 9 4.92% 1 25.00%
mauro carvalho chehab mauro carvalho chehab 5 2.73% 1 25.00%
Total 183 100.00% 4 100.00%



static void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
{
	struct em28xx *dev = priv;

	/*
         * In the case of non-AC97 volume controls, we still need
         * to do some setups at em28xx, in order to mute/unmute
         * and to adjust audio volume. However, the value ranges
         * should be checked by the corresponding V4L subdriver.
         */
	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		dev->mute = ctrl->val;
		em28xx_audio_analog_set(dev);
		break;
	case V4L2_CID_AUDIO_VOLUME:
		dev->volume = ctrl->val;
		em28xx_audio_analog_set(dev);
		break;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 41 63.08% 1 25.00%
hans verkuil hans verkuil 18 27.69% 1 25.00%
mauro carvalho chehab mauro carvalho chehab 6 9.23% 2 50.00%
Total 65 100.00% 4 100.00%



static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct em28xx_v4l2 *v4l2 =
		  container_of(ctrl->handler, struct em28xx_v4l2, ctrl_handler);
	struct em28xx *dev = v4l2->dev;
	int ret = -EINVAL;

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		dev->mute = ctrl->val;
		ret = em28xx_audio_analog_set(dev);
		break;
	case V4L2_CID_AUDIO_VOLUME:
		dev->volume = ctrl->val;
		ret = em28xx_audio_analog_set(dev);
		break;
	case V4L2_CID_CONTRAST:
		ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
		break;
	case V4L2_CID_BRIGHTNESS:
		ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
		break;
	case V4L2_CID_SATURATION:
		ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
		break;
	case V4L2_CID_BLUE_BALANCE:
		ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
		break;
	case V4L2_CID_RED_BALANCE:
		ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
		break;
	case V4L2_CID_SHARPNESS:
		ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
		break;
	}

	return (ret < 0) ? ret : 0;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 142 70.30% 2 25.00%
mauro carvalho chehab mauro carvalho chehab 31 15.35% 5 62.50%
hans verkuil hans verkuil 29 14.36% 1 12.50%
Total 202 100.00% 8 100.00%


static const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
	.s_ctrl = em28xx_s_ctrl,
};



static void size_to_scale(struct em28xx *dev,
			  unsigned int width, unsigned int height,
			unsigned int *hscale, unsigned int *vscale)
{
	unsigned int          maxw = norm_maxw(dev);
	unsigned int          maxh = norm_maxh(dev);

	*hscale = (((unsigned long)maxw) << 12) / width - 4096L;
	if (*hscale > EM28XX_HVSCALE_MAX)
		*hscale = EM28XX_HVSCALE_MAX;

	*vscale = (((unsigned long)maxh) << 12) / height - 4096L;
	if (*vscale > EM28XX_HVSCALE_MAX)
		*vscale = EM28XX_HVSCALE_MAX;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 102 93.58% 1 33.33%
frank schaefer frank schaefer 7 6.42% 2 66.67%
Total 109 100.00% 3 100.00%



static void scale_to_size(struct em28xx *dev,
			  unsigned int hscale, unsigned int vscale,
			  unsigned int *width, unsigned int *height)
{
	unsigned int          maxw = norm_maxw(dev);
	unsigned int          maxh = norm_maxh(dev);

	*width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
	*height = (((unsigned long)maxh) << 12) / (vscale + 4096L);

	/* Don't let width or height to be zero */
	if (*width < 1)
		*width = 1;
	if (*height < 1)
		*height = 1;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 89 78.07% 1 50.00%
mauro carvalho chehab mauro carvalho chehab 25 21.93% 1 50.00%
Total 114 100.00% 2 100.00%

/* ------------------------------------------------------------------
        IOCTL vidioc handling
   ------------------------------------------------------------------*/



static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct em28xx         *dev = video_drvdata(file);
	struct em28xx_v4l2    *v4l2 = dev->v4l2;

	f->fmt.pix.width = v4l2->width;
	f->fmt.pix.height = v4l2->height;
	f->fmt.pix.pixelformat = v4l2->format->fourcc;
	f->fmt.pix.bytesperline = (v4l2->width * v4l2->format->depth + 7) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * v4l2->height;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;

	/* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
	if (v4l2->progressive)
		f->fmt.pix.field = V4L2_FIELD_NONE;
	else
		f->fmt.pix.field = v4l2->interlaced_fieldmode ?
			   V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 145 86.31% 4 44.44%
frank schaefer frank schaefer 22 13.10% 4 44.44%
hans verkuil hans verkuil 1 0.60% 1 11.11%
Total 168 100.00% 9 100.00%



static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
{
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(format); i++)
		if (format[i].fourcc == fourcc)
			return &format[i];

	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 53 100.00% 1 100.00%
Total 53 100.00% 1 100.00%



static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
				  struct v4l2_format *f)
{
	struct em28xx         *dev   = video_drvdata(file);
	struct em28xx_v4l2    *v4l2  = dev->v4l2;
	unsigned int          width  = f->fmt.pix.width;
	unsigned int          height = f->fmt.pix.height;
	unsigned int          maxw   = norm_maxw(dev);
	unsigned int          maxh   = norm_maxh(dev);
	unsigned int          hscale, vscale;
	struct em28xx_fmt     *fmt;

	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
	if (!fmt) {
		em28xx_videodbg("Fourcc format (%08x) invalid.\n",
				f->fmt.pix.pixelformat);
		return -EINVAL;
	}

	if (dev->board.is_em2800) {
		/* the em2800 can only scale down to 50% */
		height = height > (3 * maxh / 4) ? maxh : maxh / 2;
		width = width > (3 * maxw / 4) ? maxw : maxw / 2;
		/*
                 * MaxPacketSize for em2800 is too small to capture at full
                 * resolution use half of maxw as the scaler can only scale
                 * to 50%
                 */
		if (width == maxw && height == maxh)
			width /= 2;
	} else {
		/* width must even because of the YUYV format
                   height must be even because of interlacing */
		v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh,
				      1, 0);
	}
	/* Avoid division by zero at size_to_scale */
	if (width < 1)
		width = 1;
	if (height < 1)
		height = 1;

	size_to_scale(dev, width, height, &hscale, &vscale);
	scale_to_size(dev, hscale, vscale, &width, &height);

	f->fmt.pix.width = width;
	f->fmt.pix.height = height;
	f->fmt.pix.pixelformat = fmt->fourcc;
	f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
	f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
	f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
	if (v4l2->progressive)
		f->fmt.pix.field = V4L2_FIELD_NONE;
	else
		f->fmt.pix.field = v4l2->interlaced_fieldmode ?
			   V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
	f->fmt.pix.priv = 0;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 287 72.66% 7 38.89%
trent piepho trent piepho 51 12.91% 1 5.56%
frank schaefer frank schaefer 28 7.09% 4 22.22%
sascha sommer sascha sommer 14 3.54% 1 5.56%
alban browaeys alban browaeys 10 2.53% 1 5.56%
hans verkuil hans verkuil 2 0.51% 2 11.11%
andrew morton andrew morton 2 0.51% 1 5.56%
devin heitmueller devin heitmueller 1 0.25% 1 5.56%
Total 395 100.00% 18 100.00%



static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
				   unsigned width, unsigned height)
{
	struct em28xx_fmt     *fmt;
	struct em28xx_v4l2    *v4l2 = dev->v4l2;

	fmt = format_by_fourcc(fourcc);
	if (!fmt)
		return -EINVAL;

	v4l2->format = fmt;
	v4l2->width  = width;
	v4l2->height = height;

	/* set new image size */
	size_to_scale(dev, v4l2->width, v4l2->height,
		      &v4l2->hscale, &v4l2->vscale);

	em28xx_resolution_set(dev);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 84 83.17% 1 25.00%
frank schaefer frank schaefer 17 16.83% 3 75.00%
Total 101 100.00% 4 100.00%



static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
				struct v4l2_format *f)
{
	struct em28xx *dev = video_drvdata(file);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	if (vb2_is_busy(&v4l2->vb_vidq))
		return -EBUSY;

	vidioc_try_fmt_vid_cap(file, priv, f);

	return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
				f->fmt.pix.width, f->fmt.pix.height);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 73 79.35% 4 50.00%
frank schaefer frank schaefer 10 10.87% 1 12.50%
devin heitmueller devin heitmueller 6 6.52% 1 12.50%
hans verkuil hans verkuil 3 3.26% 2 25.00%
Total 92 100.00% 8 100.00%



static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
	struct em28xx *dev = video_drvdata(file);

	*norm = dev->v4l2->norm;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 35 85.37% 1 33.33%
frank schaefer frank schaefer 6 14.63% 2 66.67%
Total 41 100.00% 3 100.00%



static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
{
	struct em28xx *dev = video_drvdata(file);

	v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, video, querystd, norm);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 44 88.00% 1 33.33%
frank schaefer frank schaefer 6 12.00% 2 66.67%
Total 50 100.00% 3 100.00%



static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm)
{
	struct em28xx      *dev  = video_drvdata(file);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	struct v4l2_format f;

	if (norm == v4l2->norm)
		return 0;

	if (v4l2->streaming_users > 0)
		return -EBUSY;

	v4l2->norm = norm;

	/* Adjusts width/height, if needed */
	f.fmt.pix.width = 720;
	f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
	vidioc_try_fmt_vid_cap(file, priv, &f);

	/* set new image size */
	v4l2->width = f.fmt.pix.width;
	v4l2->height = f.fmt.pix.height;
	size_to_scale(dev, v4l2->width, v4l2->height,
		      &v4l2->hscale, &v4l2->vscale);

	em28xx_resolution_set(dev);
	v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 117 63.93% 2 15.38%
hans verkuil hans verkuil 29 15.85% 2 15.38%
frank schaefer frank schaefer 26 14.21% 6 46.15%
douglas schilling landgraf douglas schilling landgraf 7 3.83% 1 7.69%
devin heitmueller devin heitmueller 3 1.64% 1 7.69%
laurent pinchart laurent pinchart 1 0.55% 1 7.69%
Total 183 100.00% 13 100.00%



static int vidioc_g_parm(struct file *file, void *priv,
			 struct v4l2_streamparm *p)
{
	struct em28xx      *dev  = video_drvdata(file);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	int rc = 0;

	p->parm.capture.readbuffers = EM28XX_MIN_BUF;
	if (dev->board.is_webcam)
		rc = v4l2_device_call_until_err(&v4l2->v4l2_dev, 0,
						video, g_parm, p);
	else
		v4l2_video_std_frame_period(v4l2->norm,
					    &p->parm.capture.timeperframe);

	return rc;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 74 74.00% 1 20.00%
frank schaefer frank schaefer 16 16.00% 3 60.00%
hans verkuil hans verkuil 10 10.00% 1 20.00%
Total 100 100.00% 5 100.00%



static int vidioc_s_parm(struct file *file, void *priv,
			 struct v4l2_streamparm *p)
{
	struct em28xx *dev = video_drvdata(file);

	p->parm.capture.readbuffers = EM28XX_MIN_BUF;
	return v4l2_device_call_until_err(&dev->v4l2->v4l2_dev,
					  0, video, s_parm, p);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 43 72.88% 1 25.00%
hans verkuil hans verkuil 10 16.95% 1 25.00%
frank schaefer frank schaefer 6 10.17% 2 50.00%
Total 59 100.00% 4 100.00%



static int vidioc_enum_input(struct file *file, void *priv,
			     struct v4l2_input *i)
{
	struct em28xx *dev = video_drvdata(file);
	unsigned int       n;

	n = i->index;
	if (n >= MAX_EM28XX_INPUT)
		return -EINVAL;
	if (0 == INPUT(n)->type)
		return -EINVAL;

	i->index = n;
	i->type = V4L2_INPUT_TYPE_CAMERA;

	strcpy(i->name, iname[INPUT(n)->type]);

	if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type))
		i->type = V4L2_INPUT_TYPE_TUNER;

	i->std = dev->v4l2->vdev.tvnorms;
	/* webcams do not have the STD API */
	if (dev->board.is_webcam)
		i->capabilities = 0;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 106 74.13% 4 44.44%
hans verkuil hans verkuil 16 11.19% 2 22.22%
andrew morton andrew morton 15 10.49% 1 11.11%
frank schaefer frank schaefer 6 4.20% 2 22.22%
Total 143 100.00% 9 100.00%



static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
	struct em28xx *dev = video_drvdata(file);

	*i = dev->ctl_input;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 36 90.00% 3 75.00%
frank schaefer frank schaefer 4 10.00% 1 25.00%
Total 40 100.00% 4 100.00%



static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
	struct em28xx *dev = video_drvdata(file);

	if (i >= MAX_EM28XX_INPUT)
		return -EINVAL;
	if (0 == INPUT(i)->type)
		return -EINVAL;

	video_mux(dev, i);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 59 92.19% 3 60.00%
frank schaefer frank schaefer 4 6.25% 1 20.00%
ezequiel garcia ezequiel garcia 1 1.56% 1 20.00%
Total 64 100.00% 5 100.00%



static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
	struct em28xx *dev = video_drvdata(file);

	switch (a->index) {
	case EM28XX_AMUX_VIDEO:
		strcpy(a->name, "Television");
		break;
	case EM28XX_AMUX_LINE_IN:
		strcpy(a->name, "Line In");
		break;
	case EM28XX_AMUX_VIDEO2:
		strcpy(a->name, "Television alt");
		break;
	case EM28XX_AMUX_PHONE:
		strcpy(a->name, "Phone");
		break;
	case EM28XX_AMUX_MIC:
		strcpy(a->name, "Mic");
		break;
	case EM28XX_AMUX_CD:
		strcpy(a->name, "CD");
		break;
	case EM28XX_AMUX_AUX:
		strcpy(a->name, "Aux");
		break;
	case EM28XX_AMUX_PCM_OUT:
		strcpy(a->name, "PCM");
		break;
	default:
		return -EINVAL;
	}

	a->index = dev->ctl_ainput;
	a->capability = V4L2_AUDCAP_STEREO;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 158 96.34% 6 75.00%
frank schaefer frank schaefer 4 2.44% 1 12.50%
andrew morton andrew morton 2 1.22% 1 12.50%
Total 164 100.00% 8 100.00%



static int vidioc_s_audio(struct file *file, void *priv, const struct v4l2_audio *a)
{
	struct em28xx *dev = video_drvdata(file);

	if (a->index >= MAX_EM28XX_INPUT)
		return -EINVAL;
	if (0 == INPUT(a->index)->type)
		return -EINVAL;

	dev->ctl_ainput = INPUT(a->index)->amux;
	dev->ctl_aoutput = INPUT(a->index)->aout;

	if (!dev->ctl_aoutput)
		dev->ctl_aoutput = EM28XX_AOUT_MASTER;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
hans verkuil hans verkuil 47 46.08% 2 18.18%
mauro carvalho chehab mauro carvalho chehab 44 43.14% 6 54.55%
andrew morton andrew morton 6 5.88% 1 9.09%
frank schaefer frank schaefer 4 3.92% 1 9.09%
douglas schilling landgraf douglas schilling landgraf 1 0.98% 1 9.09%
Total 102 100.00% 11 100.00%



static int vidioc_g_tuner(struct file *file, void *priv,
			  struct v4l2_tuner *t)
{
	struct em28xx *dev = video_drvdata(file);

	if (0 != t->index)
		return -EINVAL;

	strcpy(t->name, "Tuner");

	v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 49 68.06% 3 42.86%
douglas schilling landgraf douglas schilling landgraf 9 12.50% 1 14.29%
andrew morton andrew morton 8 11.11% 1 14.29%
frank schaefer frank schaefer 6 8.33% 2 28.57%
Total 72 100.00% 7 100.00%



static int vidioc_s_tuner(struct file *file, void *priv,
			  const struct v4l2_tuner *t)
{
	struct em28xx *dev = video_drvdata(file);

	if (0 != t->index)
		return -EINVAL;

	v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 38 59.38% 3 33.33%
douglas schilling landgraf douglas schilling landgraf 9 14.06% 1 11.11%
andrew morton andrew morton 8 12.50% 1 11.11%
frank schaefer frank schaefer 6 9.38% 2 22.22%
sascha sommer sascha sommer 2 3.12% 1 11.11%
hans verkuil hans verkuil 1 1.56% 1 11.11%
Total 64 100.00% 9 100.00%



static int vidioc_g_frequency(struct file *file, void *priv,
			      struct v4l2_frequency *f)
{
	struct em28xx         *dev = video_drvdata(file);
	struct em28xx_v4l2    *v4l2 = dev->v4l2;

	if (0 != f->tuner)
		return -EINVAL;

	f->frequency = v4l2->frequency;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 35 56.45% 2 33.33%
frank schaefer frank schaefer 15 24.19% 2 33.33%
hans verkuil hans verkuil 10 16.13% 1 16.67%
andrew morton andrew morton 2 3.23% 1 16.67%
Total 62 100.00% 6 100.00%



static int vidioc_s_frequency(struct file *file, void *priv,
			      const struct v4l2_frequency *f)
{
	struct v4l2_frequency  new_freq = *f;
	struct em28xx             *dev  = video_drvdata(file);
	struct em28xx_v4l2        *v4l2 = dev->v4l2;

	if (0 != f->tuner)
		return -EINVAL;

	v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_frequency, f);
	v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, g_frequency, &new_freq);
	v4l2->frequency = new_freq.frequency;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 50 48.54% 3 33.33%
hans verkuil hans verkuil 28 27.18% 2 22.22%
frank schaefer frank schaefer 17 16.50% 3 33.33%
douglas schilling landgraf douglas schilling landgraf 8 7.77% 1 11.11%
Total 103 100.00% 9 100.00%

#ifdef CONFIG_VIDEO_ADV_DEBUG


static int vidioc_g_chip_info(struct file *file, void *priv,
			      struct v4l2_dbg_chip_info *chip)
{
	struct em28xx *dev = video_drvdata(file);

	if (chip->match.addr > 1)
		return -EINVAL;
	if (chip->match.addr == 1)
		strlcpy(chip->name, "ac97", sizeof(chip->name));
	else
		strlcpy(chip->name,
			dev->v4l2->v4l2_dev.name, sizeof(chip->name));
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
hans verkuil hans verkuil 90 93.75% 2 50.00%
frank schaefer frank schaefer 6 6.25% 2 50.00%
Total 96 100.00% 4 100.00%



static int em28xx_reg_len(int reg)
{
	switch (reg) {
	case EM28XX_R40_AC97LSB:
	case EM28XX_R30_HSCALELOW:
	case EM28XX_R32_VSCALELOW:
		return 2;
	default:
		return 1;
	}
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 31 100.00% 1 100.00%
Total 31 100.00% 1 100.00%



static int vidioc_g_register(struct file *file, void *priv,
			     struct v4l2_dbg_register *reg)
{
	struct em28xx *dev = video_drvdata(file);
	int ret;

	if (reg->match.addr > 1)
		return -EINVAL;
	if (reg->match.addr) {
		ret = em28xx_read_ac97(dev, reg->reg);
		if (ret < 0)
			return ret;

		reg->val = ret;
		reg->size = 1;
		return 0;
	}

	/* Match host */
	reg->size = em28xx_reg_len(reg->reg);
	if (reg->size == 1) {
		ret = em28xx_read_reg(dev, reg->reg);

		if (ret < 0)
			return ret;

		reg->val = ret;
	} else {
		__le16 val = 0;

		ret = dev->em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
						   reg->reg, (char *)&val, 2);
		if (ret < 0)
			return ret;

		reg->val = le16_to_cpu(val);
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 147 76.17% 7 63.64%
hans verkuil hans verkuil 42 21.76% 3 27.27%
frank schaefer frank schaefer 4 2.07% 1 9.09%
Total 193 100.00% 11 100.00%



static int vidioc_s_register(struct file *file, void *priv,
			     const struct v4l2_dbg_register *reg)
{
	struct em28xx *dev = video_drvdata(file);
	__le16 buf;

	if (reg->match.addr > 1)
		return -EINVAL;
	if (reg->match.addr)
		return em28xx_write_ac97(dev, reg->reg, reg->val);

	/* Match host */
	buf = cpu_to_le16(reg->val);

	return em28xx_write_regs(dev, reg->reg, (char *)&buf,
			       em28xx_reg_len(reg->reg));
}
Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 72 69.23% 4 44.44%
hans verkuil hans verkuil 28 26.92% 4 44.44%
frank schaefer frank schaefer 4 3.85% 1 11.11%
Total 104 100.00% 9 100.00%

#endif



static int vidioc_querycap(struct file *file, void  *priv,
			   struct v4l2_capability *cap)
{
	struct video_device   *vdev = video_devdata(file);
	struct em28xx         *dev  = video_drvdata(file);
	struct em28xx_v4l2    *v4l2 = dev->v4l2;

	strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
	strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
	usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));

	if (vdev->vfl_type == VFL_TYPE_GRABBER)
		cap->device_caps = V4L2_CAP_READWRITE |
			V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
	else if (vdev->vfl_type == VFL_TYPE_RADIO)
		cap->device_caps = V4L2_CAP_RADIO;
	else
		cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;

	if (dev->int_audio_type != EM28XX_INT_AUDIO_NONE)
		cap->device_caps |= V4L2_CAP_AUDIO;

	if (dev->tuner_type != TUNER_ABSENT)
		cap->device_caps |= V4L2_CAP_TUNER;

	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS |
		V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
	if (video_is_registered(&v4l2->vbi_dev))
		cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
	if (video_is_registered(&v4l2->radio_dev))
		cap->capabilities |= V4L2_CAP_RADIO;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 168 74.01% 3 27.27%
mauro carvalho chehab mauro carvalho chehab 33 14.54% 4 36.36%
frank schaefer frank schaefer 18 7.93% 3 27.27%
hans verkuil hans verkuil 8 3.52% 1 9.09%
Total 227 100.00% 11 100.00%



static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
				   struct v4l2_fmtdesc *f)
{
	if (unlikely(f->index >= ARRAY_SIZE(format)))
		return -EINVAL;

	strlcpy(f->description, format[f->index].name, sizeof(f->description));
	f->pixelformat = format[f->index].fourcc;

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 47 61.04% 3 42.86%
mauro carvalho chehab mauro carvalho chehab 29 37.66% 3 42.86%
hans verkuil hans verkuil 1 1.30% 1 14.29%
Total 77 100.00% 7 100.00%



static int vidioc_enum_framesizes(struct file *file, void *priv,
				  struct v4l2_frmsizeenum *fsize)
{
	struct em28xx         *dev = video_drvdata(file);
	struct em28xx_fmt     *fmt;
	unsigned int	      maxw = norm_maxw(dev);
	unsigned int	      maxh = norm_maxh(dev);

	fmt = format_by_fourcc(fsize->pixel_format);
	if (!fmt) {
		em28xx_videodbg("Fourcc format (%08x) invalid.\n",
				fsize->pixel_format);
		return -EINVAL;
	}

	if (dev->board.is_em2800) {
		if (fsize->index > 1)
			return -EINVAL;
		fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
		fsize->discrete.width = maxw / (1 + fsize->index);
		fsize->discrete.height = maxh / (1 + fsize->index);
		return 0;
	}

	if (fsize->index != 0)
		return -EINVAL;

	/* Report a continuous range */
	fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
	scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
		      &fsize->stepwise.min_width, &fsize->stepwise.min_height);
	if (fsize->stepwise.min_width < 48)
		fsize->stepwise.min_width = 48;
	if (fsize->stepwise.min_height < 38)
		fsize->stepwise.min_height = 38;
	fsize->stepwise.max_width = maxw;
	fsize->stepwise.max_height = maxh;
	fsize->stepwise.step_width = 1;
	fsize->stepwise.step_height = 1;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 144 55.81% 2 25.00%
mauro carvalho chehab mauro carvalho chehab 51 19.77% 3 37.50%
frank schaefer frank schaefer 48 18.60% 2 25.00%
hans verkuil hans verkuil 15 5.81% 1 12.50%
Total 258 100.00% 8 100.00%

/* RAW VBI ioctls */



static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
				struct v4l2_format *format)
{
	struct em28xx         *dev  = video_drvdata(file);
	struct em28xx_v4l2    *v4l2 = dev->v4l2;

	format->fmt.vbi.samples_per_line = v4l2->vbi_width;
	format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
	format->fmt.vbi.offset = 0;
	format->fmt.vbi.flags = 0;
	format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
	format->fmt.vbi.count[0] = v4l2->vbi_height;
	format->fmt.vbi.count[1] = v4l2->vbi_height;
	memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));

	/* Varies by video standard (NTSC, PAL, etc.) */
	if (v4l2->norm & V4L2_STD_525_60) {
		/* NTSC */
		format->fmt.vbi.start[0] = 10;
		format->fmt.vbi.start[1] = 273;
	} else if (v4l2->norm & V4L2_STD_625_50) {
		/* PAL */
		format->fmt.vbi.start[0] = 6;
		format->fmt.vbi.start[1] = 318;
	}

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 177 77.63% 1 14.29%
mauro carvalho chehab mauro carvalho chehab 33 14.47% 3 42.86%
frank schaefer frank schaefer 18 7.89% 3 42.86%
Total 228 100.00% 7 100.00%

/* ----------------------------------------------------------- */
/* RADIO ESPECIFIC IOCTLS                                      */
/* ----------------------------------------------------------- */



static int radio_g_tuner(struct file *file, void *priv,
			 struct v4l2_tuner *t)
{
	struct em28xx *dev = video_drvdata(file);

	if (unlikely(t->index > 0))
		return -EINVAL;

	strcpy(t->name, "Radio");

	v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, g_tuner, t);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 64 85.33% 3 50.00%
frank schaefer frank schaefer 6 8.00% 2 33.33%
hans verkuil hans verkuil 5 6.67% 1 16.67%
Total 75 100.00% 6 100.00%



static int radio_s_tuner(struct file *file, void *priv,
			 const struct v4l2_tuner *t)
{
	struct em28xx *dev = video_drvdata(file);

	if (0 != t->index)
		return -EINVAL;

	v4l2_device_call_all(&dev->v4l2->v4l2_dev, 0, tuner, s_tuner, t);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 29 45.31% 2 25.00%
devin heitmueller devin heitmueller 22 34.38% 2 25.00%
hans verkuil hans verkuil 7 10.94% 2 25.00%
frank schaefer frank schaefer 6 9.38% 2 25.00%
Total 64 100.00% 8 100.00%

/*
 * em28xx_free_v4l2() - Free struct em28xx_v4l2
 *
 * @ref: struct kref for struct em28xx_v4l2
 *
 * Called when all users of struct em28xx_v4l2 are gone
 */


static void em28xx_free_v4l2(struct kref *ref)
{
	struct em28xx_v4l2 *v4l2 = container_of(ref, struct em28xx_v4l2, ref);

	v4l2->dev->v4l2 = NULL;
	kfree(v4l2);
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 38 97.44% 2 66.67%
mauro carvalho chehab mauro carvalho chehab 1 2.56% 1 33.33%
Total 39 100.00% 3 100.00%

/*
 * em28xx_v4l2_open()
 * inits the device and starts isoc transfer
 */


static int em28xx_v4l2_open(struct file *filp)
{
	struct video_device *vdev = video_devdata(filp);
	struct em28xx *dev = video_drvdata(filp);
	struct em28xx_v4l2 *v4l2 = dev->v4l2;
	enum v4l2_buf_type fh_type = 0;
	int ret;

	switch (vdev->vfl_type) {
	case VFL_TYPE_GRABBER:
		fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		break;
	case VFL_TYPE_VBI:
		fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
		break;
	case VFL_TYPE_RADIO:
		break;
	default:
		return -EINVAL;
	}

	em28xx_videodbg("open dev=%s type=%s users=%d\n",
			video_device_node_name(vdev), v4l2_type_names[fh_type],
			v4l2->users);

	if (mutex_lock_interruptible(&dev->lock))
		return -ERESTARTSYS;

	ret = v4l2_fh_open(filp);
	if (ret) {
		em28xx_errdev("%s: v4l2_fh_open() returned error %d\n",
			      __func__, ret);
		mutex_unlock(&dev->lock);
		return ret;
	}

	if (v4l2->users == 0) {
		em28xx_set_mode(dev, EM28XX_ANALOG_MODE);

		if (vdev->vfl_type != VFL_TYPE_RADIO)
			em28xx_resolution_set(dev);

		/*
                 * Needed, since GPIO might have disabled power
                 * of some i2c devices
                 */
		em28xx_wake_i2c(dev);
	}

	if (vdev->vfl_type == VFL_TYPE_RADIO) {
		em28xx_videodbg("video_open: setting radio device\n");
		v4l2_device_call_all(&v4l2->v4l2_dev, 0, tuner, s_radio);
	}

	kref_get(&dev->ref);
	kref_get(&v4l2->ref);
	v4l2->users++;

	mutex_unlock(&dev->lock);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 124 50.61% 3 25.00%
frank schaefer frank schaefer 63 25.71% 4 33.33%
mauro carvalho chehab mauro carvalho chehab 43 17.55% 4 33.33%
hans verkuil hans verkuil 15 6.12% 1 8.33%
Total 245 100.00% 12 100.00%

/*
 * em28xx_v4l2_fini()
 * unregisters the v4l2,i2c and usb devices
 * called when the device gets disconected or at module unload
*/


static int em28xx_v4l2_fini(struct em28xx *dev)
{
	struct em28xx_v4l2 *v4l2 = dev->v4l2;

	if (dev->is_audio_only) {
		/* Shouldn't initialize IR for this interface */
		return 0;
	}

	if (!dev->has_video) {
		/* This device does not support the v4l2 extension */
		return 0;
	}

	if (v4l2 == NULL)
		return 0;

	em28xx_info("Closing video extension\n");

	mutex_lock(&dev->lock);

	v4l2_device_disconnect(&v4l2->v4l2_dev);

	em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);

	em28xx_v4l2_media_release(dev);

	if (video_is_registered(&v4l2->radio_dev)) {
		em28xx_info("V4L2 device %s deregistered\n",
			    video_device_node_name(&v4l2->radio_dev));
		video_unregister_device(&v4l2->radio_dev);
	}
	if (video_is_registered(&v4l2->vbi_dev)) {
		em28xx_info("V4L2 device %s deregistered\n",
			    video_device_node_name(&v4l2->vbi_dev));
		video_unregister_device(&v4l2->vbi_dev);
	}
	if (video_is_registered(&v4l2->vdev)) {
		em28xx_info("V4L2 device %s deregistered\n",
			    video_device_node_name(&v4l2->vdev));
		video_unregister_device(&v4l2->vdev);
	}

	v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
	v4l2_device_unregister(&v4l2->v4l2_dev);

	if (v4l2->clk) {
		v4l2_clk_unregister_fixed(v4l2->clk);
		v4l2->clk = NULL;
	}

	kref_put(&v4l2->ref, em28xx_free_v4l2);

	mutex_unlock(&dev->lock);

	kref_put(&dev->ref, em28xx_free_device);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
frank schaefer frank schaefer 99 38.98% 9 36.00%
mauro carvalho chehab mauro carvalho chehab 76 29.92% 9 36.00%
devin heitmueller devin heitmueller 43 16.93% 3 12.00%
hans verkuil hans verkuil 35 13.78% 3 12.00%
russell king russell king 1 0.39% 1 4.00%
Total 254 100.00% 25 100.00%



static int em28xx_v4l2_suspend(struct em28xx *dev)
{
	if (dev->is_audio_only)
		return 0;

	if (!dev->has_video)
		return 0;

	em28xx_info("Suspending video extension\n");
	em28xx_stop_urbs(dev);
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
shuah khan shuah khan 42 97.67% 1 50.00%
russell king russell king 1 2.33% 1 50.00%
Total 43 100.00% 2 100.00%



static int em28xx_v4l2_resume(struct em28xx *dev)
{
	if (dev->is_audio_only)
		return 0;

	if (!dev->has_video)
		return 0;

	em28xx_info("Resuming video extension\n");
	/* what do we do here */
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
shuah khan shuah khan 38 97.44% 1 50.00%
russell king russell king 1 2.56% 1 50.00%
Total 39 100.00% 2 100.00%

/*
 * em28xx_v4l2_close()
 * stops streaming and deallocates all resources allocated by the v4l2
 * calls and ioctls
 */


static int em28xx_v4l2_close(struct file *filp)
{
	struct em28xx         *dev  = video_drvdata(filp);
	struct em28xx_v4l2    *v4l2 = dev->v4l2;
	int              errCode;

	em28xx_videodbg("users=%d\n", v4l2->users);

	vb2_fop_release(filp);
	mutex_lock(&dev->lock);

	if (v4l2->users == 1) {
		/* No sense to try to write to the device */
		if (dev->disconnected)
			goto exit;

		/* Save some power by putting tuner to sleep */
		v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0);

		/* do this before setting alternate! */
		em28xx_set_mode(dev, EM28XX_SUSPEND);

		/* set alternate 0 */
		dev->alt = 0;
		em28xx_videodbg("setting alternate 0\n");
		errCode = usb_set_interface(dev->udev, 0, 0);
		if (errCode < 0) {
			em28xx_errdev("cannot change alternate number to "
					"0 (error=%i)\n", errCode);
		}
	}

exit:
	v4l2->users--;
	kref_put(&v4l2->ref, em28xx_free_v4l2);
	mutex_unlock(&dev->lock);
	kref_put(&dev->ref, em28xx_free_device);

	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
devin heitmueller devin heitmueller 79 44.13% 2 16.67%
frank schaefer frank schaefer 49 27.37% 5 41.67%
mauro carvalho chehab mauro carvalho chehab 43 24.02% 4 33.33%
hans verkuil hans verkuil 8 4.47% 1 8.33%
Total 179 100.00% 12 100.00%


static const struct v4l2_file_operations em28xx_v4l_fops = {
	.owner         = THIS_MODULE,
	.open          = em28xx_v4l2_open,
	.release       = em28xx_v4l2_close,
	.read          = vb2_fop_read,
	.poll          = vb2_fop_poll,
	.mmap          = vb2_fop_mmap,
	.unlocked_ioctl = video_ioctl2,
};


static const struct v4l2_ioctl_ops video_ioctl_ops = {
	.vidioc_querycap            = vidioc_querycap,
	.vidioc_enum_fmt_vid_cap    = vidioc_enum_fmt_vid_cap,
	.vidioc_g_fmt_vid_cap       = vidioc_g_fmt_vid_cap,
	.vidioc_try_fmt_vid_cap     = vidioc_try_fmt_vid_cap,
	.vidioc_s_fmt_vid_cap       = vidioc_s_fmt_vid_cap,
	.vidioc_g_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
	.vidioc_try_fmt_vbi_cap     = vidioc_g_fmt_vbi_cap,
	.vidioc_s_fmt_vbi_cap       = vidioc_g_fmt_vbi_cap,
	.vidioc_enum_framesizes     = vidioc_enum_framesizes,
	.vidioc_g_audio             = vidioc_g_audio,
	.vidioc_s_audio             = vidioc_s_audio,

	.vidioc_reqbufs             = vb2_ioctl_reqbufs,
	.vidioc_create_bufs         = vb2_ioctl_create_bufs,
	.vidioc_prepare_buf         = vb2_ioctl_prepare_buf,
	.vidioc_querybuf            = vb2_ioctl_querybuf,
	.vidioc_qbuf                = vb2_ioctl_qbuf,
	.vidioc_dqbuf               = vb2_ioctl_dqbuf,

	.vidioc_g_std               = vidioc_g_std,
	.vidioc_querystd            = vidioc_querystd,
	.vidioc_s_std               = vidioc_s_std,
	.vidioc_g_parm		    = vidioc_g_parm,
	.vidioc_s_parm		    = vidioc_s_parm,
	.vidioc_enum_input          = vidioc_enum_input,
	.vidioc_g_input             = vidioc_g_input,
	.vidioc_s_input             = vidioc_s_input,
	.vidioc_streamon            = vb2_ioctl_streamon,
	.vidioc_streamoff           = vb2_ioctl_streamoff,
	.vidioc_g_tuner             = vidioc_g_tuner,
	.vidioc_s_tuner             = vidioc_s_tuner,
	.vidioc_g_frequency         = vidioc_g_frequency,
	.vidioc_s_frequency         = vidioc_s_frequency,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.vidioc_g_chip_info         = vidioc_g_chip_info,
	.vidioc_g_register          = vidioc_g_register,
	.vidioc_s_register          = vidioc_s_register,
#endif
};


static const struct video_device em28xx_video_template = {
	.fops		= &em28xx_v4l_fops,
	.ioctl_ops	= &video_ioctl_ops,
	.release	= video_device_release_empty,
	.tvnorms	= V4L2_STD_ALL,
};


static const struct v4l2_file_operations radio_fops = {
	.owner         = THIS_MODULE,
	.open          = em28xx_v4l2_open,
	.release       = em28xx_v4l2_close,
	.unlocked_ioctl = video_ioctl2,
};


static const struct v4l2_ioctl_ops radio_ioctl_ops = {
	.vidioc_querycap      = vidioc_querycap,
	.vidioc_g_tuner       = radio_g_tuner,
	.vidioc_s_tuner       = radio_s_tuner,
	.vidioc_g_frequency   = vidioc_g_frequency,
	.vidioc_s_frequency   = vidioc_s_frequency,
	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
	.vidioc_g_chip_info   = vidioc_g_chip_info,
	.vidioc_g_register    = vidioc_g_register,
	.vidioc_s_register    = vidioc_s_register,
#endif
};


static struct video_device em28xx_radio_template = {
	.fops		= &radio_fops,
	.ioctl_ops	= &radio_ioctl_ops,
	.release	= video_device_release_empty,
};

/* I2C possible address to saa7115, tvp5150, msp3400, tvaudio */

static unsigned short saa711x_addrs[] = {
	0x4a >> 1, 0x48 >> 1,   /* SAA7111, SAA7111A and SAA7113 */
	0x42 >> 1, 0x40 >> 1,   /* SAA7114, SAA7115 and SAA7118 */
	I2C_CLIENT_END };


static unsigned short tvp5150_addrs[] = {
	0xb8 >> 1,
	0xba >> 1,
	I2C_CLIENT_END
};


static unsigned short msp3400_addrs[] = {
	0x80 >> 1,
	0x88 >> 1,
	I2C_CLIENT_END
};

/******************************** usb interface ******************************/



static void em28xx_vdev_init(struct em28xx *dev,
			     struct video_device *vfd,
			     const struct video_device *template,
			     const char *type_name)
{
	*vfd		= *template;
	vfd->v4l2_dev	= &dev->v4l2->v4l2_dev;
	vfd->lock	= &dev->lock;
	if (dev->board.is_webcam)
		vfd->tvnorms = 0;

	snprintf(vfd->name, sizeof(vfd->name), "%s %s",
		 dev->name, type_name);

	video_set_drvdata(vfd, dev);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 87 90.62% 1 33.33%
hans verkuil hans verkuil 7 7.29% 1 33.33%
frank schaefer frank schaefer 2 2.08% 1 33.33%
Total 96 100.00% 3 100.00%



static void em28xx_tuner_setup(struct em28xx *dev, unsigned short tuner_addr)
{
	struct em28xx_v4l2      *v4l2 = dev->v4l2;
	struct v4l2_device      *v4l2_dev = &v4l2->v4l2_dev;
	struct tuner_setup      tun_setup;
	struct v4l2_frequency   f;

	memset(&tun_setup, 0, sizeof(tun_setup));

	tun_setup.mode_mask = T_ANALOG_TV | T_RADIO;
	tun_setup.tuner_callback = em28xx_tuner_callback;

	if (dev->board.radio.type) {
		tun_setup.type = dev->board.radio.type;
		tun_setup.addr = dev->board.radio_addr;

		v4l2_device_call_all(v4l2_dev,
				     0, tuner, s_type_addr, &tun_setup);
	}

	if ((dev->tuner_type != TUNER_ABSENT) && (dev->tuner_type)) {
		tun_setup.type   = dev->tuner_type;
		tun_setup.addr   = tuner_addr;

		v4l2_device_call_all(v4l2_dev,
				     0, tuner, s_type_addr, &tun_setup);
	}

	if (dev->board.tda9887_conf) {
		struct v4l2_priv_tun_config tda9887_cfg;

		tda9887_cfg.tuner = TUNER_TDA9887;
		tda9887_cfg.priv = &dev->board.tda9887_conf;

		v4l2_device_call_all(v4l2_dev,
				     0, tuner, s_config, &tda9887_cfg);
	}

	if (dev->tuner_type == TUNER_XC2028) {
		struct v4l2_priv_tun_config  xc2028_cfg;
		struct xc2028_ctrl           ctl;

		memset(&xc2028_cfg, 0, sizeof(xc2028_cfg));
		memset(&ctl, 0, sizeof(ctl));

		em28xx_setup_xc3028(dev, &ctl);

		xc2028_cfg.tuner = TUNER_XC2028;
		xc2028_cfg.priv  = &ctl;

		v4l2_device_call_all(v4l2_dev, 0, tuner, s_config, &xc2028_cfg);
	}

	/* configure tuner */
	f.tuner = 0;
	f.type = V4L2_TUNER_ANALOG_TV;
	f.frequency = 9076;     /* just a magic number */
	v4l2->frequency = f.frequency;
	v4l2_device_call_all(v4l2_dev, 0, tuner, s_frequency, &f);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 277 84.19% 7 43.75%
frank schaefer frank schaefer 29 8.81% 4 25.00%
hans verkuil hans verkuil 22 6.69% 4 25.00%
douglas schilling landgraf douglas schilling landgraf 1 0.30% 1 6.25%
Total 329 100.00% 16 100.00%



static int em28xx_v4l2_init(struct em28xx *dev)
{
	u8 val;
	int ret;
	unsigned int maxw;
	struct v4l2_ctrl_handler *hdl;
	struct em28xx_v4l2 *v4l2;

	if (dev->is_audio_only) {
		/* Shouldn't initialize IR for this interface */
		return 0;
	}

	if (!dev->has_video) {
		/* This device does not support the v4l2 extension */
		return 0;
	}

	em28xx_info("Registering V4L2 extension\n");

	mutex_lock(&dev->lock);

	v4l2 = kzalloc(sizeof(struct em28xx_v4l2), GFP_KERNEL);
	if (v4l2 == NULL) {
		em28xx_info("em28xx_v4l: memory allocation failed\n");
		mutex_unlock(&dev->lock);
		return -ENOMEM;
	}
	kref_init(&v4l2->ref);
	v4l2->dev = dev;
	dev->v4l2 = v4l2;

#ifdef CONFIG_MEDIA_CONTROLLER
	v4l2->v4l2_dev.mdev = dev->media_dev;
#endif
	ret = v4l2_device_register(&dev->udev->dev, &v4l2->v4l2_dev);
	if (ret < 0) {
		em28xx_errdev("Call to v4l2_device_register() failed!\n");
		goto err;
	}

	hdl = &v4l2->ctrl_handler;
	v4l2_ctrl_handler_init(hdl, 8);
	v4l2->v4l2_dev.ctrl_handler = hdl;

	if (dev->board.is_webcam)
		v4l2->progressive = true;

	/*
         * Default format, used for tvp5150 or saa711x output formats
         */
	v4l2->vinmode = 0x10;
	v4l2->vinctl  = EM28XX_VINCTRL_INTERLACED |
			EM28XX_VINCTRL_CCIR656_ENABLE;

	/* request some modules */

	if (dev->board.has_msp34xx)
		v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
				    &dev->i2c_adap[dev->def_i2c_bus],
				    "msp3400", 0, msp3400_addrs);

	if (dev->board.decoder == EM28XX_SAA711X)
		v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
				    &dev->i2c_adap[dev->def_i2c_bus],
				    "saa7115_auto", 0, saa711x_addrs);

	if (dev->board.decoder == EM28XX_TVP5150)
		v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
				    &dev->i2c_adap[dev->def_i2c_bus],
				    "tvp5150", 0, tvp5150_addrs);

	if (dev->board.adecoder == EM28XX_TVAUDIO)
		v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
				    &dev->i2c_adap[dev->def_i2c_bus],
				    "tvaudio", dev->board.tvaudio_addr, NULL);

	/* Initialize tuner and camera */

	if (dev->board.tuner_type != TUNER_ABSENT) {
		unsigned short tuner_addr = dev->board.tuner_addr;
		int has_demod = (dev->board.tda9887_conf & TDA9887_PRESENT);

		if (dev->board.radio.type)
			v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
					    &dev->i2c_adap[dev->def_i2c_bus],
					    "tuner", dev->board.radio_addr,
					    NULL);

		if (has_demod)
			v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
					    &dev->i2c_adap[dev->def_i2c_bus],
					    "tuner", 0,
					    v4l2_i2c_tuner_addrs(ADDRS_DEMOD));
		if (tuner_addr == 0) {
			enum v4l2_i2c_tuner_type type =
				has_demod ? ADDRS_TV_WITH_DEMOD : ADDRS_TV;
			struct v4l2_subdev *sd;

			sd = v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
						 &dev->i2c_adap[dev->def_i2c_bus],
						 "tuner", 0,
						 v4l2_i2c_tuner_addrs(type));

			if (sd)
				tuner_addr = v4l2_i2c_subdev_addr(sd);
		} else {
			v4l2_i2c_new_subdev(&v4l2->v4l2_dev,
					    &dev->i2c_adap[dev->def_i2c_bus],
					    "tuner", tuner_addr, NULL);
		}

		em28xx_tuner_setup(dev, tuner_addr);
	}

	if (dev->em28xx_sensor != EM28XX_NOSENSOR)
		em28xx_init_camera(dev);

	/* Configure audio */
	ret = em28xx_audio_setup(dev);
	if (ret < 0) {
		em28xx_errdev("%s: Error while setting audio - error [%d]!\n",
			      __func__, ret);
		goto unregister_dev;
	}
	if (dev->audio_mode.ac97 != EM28XX_NO_AC97) {
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_AUDIO_VOLUME, 0, 0x1f, 1, 0x1f);
	} else {
		/* install the em28xx notify callback */
		v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_MUTE),
				 em28xx_ctrl_notify, dev);
		v4l2_ctrl_notify(v4l2_ctrl_find(hdl, V4L2_CID_AUDIO_VOLUME),
				 em28xx_ctrl_notify, dev);
	}

	/* wake i2c devices */
	em28xx_wake_i2c(dev);

	/* init video dma queues */
	INIT_LIST_HEAD(&dev->vidq.active);
	INIT_LIST_HEAD(&dev->vbiq.active);

	if (dev->board.has_msp34xx) {
		/* Send a reset to other chips via gpio */
		ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xf7);
		if (ret < 0) {
			em28xx_errdev("%s: em28xx_write_reg - msp34xx(1) failed! error [%d]\n",
				      __func__, ret);
			goto unregister_dev;
		}
		msleep(3);

		ret = em28xx_write_reg(dev, EM2820_R08_GPIO_CTRL, 0xff);
		if (ret < 0) {
			em28xx_errdev("%s: em28xx_write_reg - msp34xx(2) failed! error [%d]\n",
				      __func__, ret);
			goto unregister_dev;
		}
		msleep(3);
	}

	/* set default norm */
	v4l2->norm = V4L2_STD_PAL;
	v4l2_device_call_all(&v4l2->v4l2_dev, 0, video, s_std, v4l2->norm);
	v4l2->interlaced_fieldmode = EM28XX_INTERLACED_DEFAULT;

	/* Analog specific initialization */
	v4l2->format = &format[0];

	maxw = norm_maxw(dev);
	/* MaxPacketSize for em2800 is too small to capture at full resolution
         * use half of maxw as the scaler can only scale to 50% */
	if (dev->board.is_em2800)
		maxw /= 2;

	em28xx_set_video_format(dev, format[0].fourcc,
				maxw, norm_maxh(dev));

	video_mux(dev, 0);

	/* Audio defaults */
	dev->mute = 1;
	dev->volume = 0x1f;

/*      em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
	val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
	em28xx_write_reg(dev, EM28XX_R0F_XCLK,
			 (EM28XX_XCLK_AUDIO_UNMUTE | val));

	em28xx_set_outfmt(dev);

	/* Add image controls */
	/* NOTE: at this point, the subdevices are already registered, so bridge
         * controls are only added/enabled when no subdevice provides them */
	if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_CONTRAST))
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_CONTRAST,
				  0, 0x1f, 1, CONTRAST_DEFAULT);
	if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BRIGHTNESS))
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_BRIGHTNESS,
				  -0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
	if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SATURATION))
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_SATURATION,
				  0, 0x1f, 1, SATURATION_DEFAULT);
	if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_BLUE_BALANCE))
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_BLUE_BALANCE,
				  -0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
	if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_RED_BALANCE))
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_RED_BALANCE,
				  -0x30, 0x30, 1, RED_BALANCE_DEFAULT);
	if (NULL == v4l2_ctrl_find(hdl, V4L2_CID_SHARPNESS))
		v4l2_ctrl_new_std(hdl, &em28xx_ctrl_ops,
				  V4L2_CID_SHARPNESS,
				  0, 0x0f, 1, SHARPNESS_DEFAULT);

	/* Reset image controls */
	em28xx_colorlevels_set_default(dev);
	v4l2_ctrl_handler_setup(hdl);
	ret = hdl->error;
	if (ret)
		goto unregister_dev;

	/* allocate and fill video video_device struct */
	em28xx_vdev_init(dev, &v4l2->vdev, &em28xx_video_template, "video");
	mutex_init(&v4l2->vb_queue_lock);
	mutex_init(&v4l2->vb_vbi_queue_lock);
	v4l2->vdev.queue = &v4l2->vb_vidq;
	v4l2->vdev.queue->lock = &v4l2->vb_queue_lock;

	/* disable inapplicable ioctls */
	if (dev->board.is_webcam) {
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_QUERYSTD);
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_STD);
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_STD);
	} else {
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_PARM);
	}
	if (dev->tuner_type == TUNER_ABSENT) {
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_TUNER);
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_TUNER);
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_FREQUENCY);
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_FREQUENCY);
	}
	if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_G_AUDIO);
		v4l2_disable_ioctl(&v4l2->vdev, VIDIOC_S_AUDIO);
	}

	/* register v4l2 video video_device */
	ret = video_register_device(&v4l2->vdev, VFL_TYPE_GRABBER,
				    video_nr[dev->devno]);
	if (ret) {
		em28xx_errdev("unable to register video device (error=%i).\n",
			      ret);
		goto unregister_dev;
	}

	/* Allocate and fill vbi video_device struct */
	if (em28xx_vbi_supported(dev) == 1) {
		em28xx_vdev_init(dev, &v4l2->vbi_dev, &em28xx_video_template,
				"vbi");

		v4l2->vbi_dev.queue = &v4l2->vb_vbiq;
		v4l2->vbi_dev.queue->lock = &v4l2->vb_vbi_queue_lock;

		/* disable inapplicable ioctls */
		v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_PARM);
		if (dev->tuner_type == TUNER_ABSENT) {
			v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_TUNER);
			v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_TUNER);
			v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_FREQUENCY);
			v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_FREQUENCY);
		}
		if (dev->int_audio_type == EM28XX_INT_AUDIO_NONE) {
			v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_G_AUDIO);
			v4l2_disable_ioctl(&v4l2->vbi_dev, VIDIOC_S_AUDIO);
		}

		/* register v4l2 vbi video_device */
		ret = video_register_device(&v4l2->vbi_dev, VFL_TYPE_VBI,
					    vbi_nr[dev->devno]);
		if (ret < 0) {
			em28xx_errdev("unable to register vbi device\n");
			goto unregister_dev;
		}
	}

	if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
		em28xx_vdev_init(dev, &v4l2->radio_dev, &em28xx_radio_template,
				   "radio");
		ret = video_register_device(&v4l2->radio_dev, VFL_TYPE_RADIO,
					    radio_nr[dev->devno]);
		if (ret < 0) {
			em28xx_errdev("can't register radio device\n");
			goto unregister_dev;
		}
		em28xx_info("Registered radio device as %s\n",
			    video_device_node_name(&v4l2->radio_dev));
	}

	/* Init entities at the Media Controller */
	em28xx_v4l2_create_entities(dev);

#ifdef CONFIG_MEDIA_CONTROLLER
	ret = v4l2_mc_create_media_graph(dev->media_dev);
	if (ret) {
		em28xx_errdev("failed to create media graph\n");
		em28xx_v4l2_media_release(dev);
		goto unregister_dev;
	}
#endif

	em28xx_info("V4L2 video device registered as %s\n",
		    video_device_node_name(&v4l2->vdev));

	if (video_is_registered(&v4l2->vbi_dev))
		em28xx_info("V4L2 VBI device registered as %s\n",
			    video_device_node_name(&v4l2->vbi_dev));

	/* Save some power by putting tuner to sleep */
	v4l2_device_call_all(&v4l2->v4l2_dev, 0, core, s_power, 0);

	/* initialize videobuf2 stuff */
	em28xx_vb2_setup(dev);

	em28xx_info("V4L2 extension successfully initialized\n");

	kref_get(&dev->ref);

	mutex_unlock(&dev->lock);
	return 0;

unregister_dev:
	if (video_is_registered(&v4l2->radio_dev)) {
		em28xx_info("V4L2 device %s deregistered\n",
			    video_device_node_name(&v4l2->radio_dev));
		video_unregister_device(&v4l2->radio_dev);
	}
	if (video_is_registered(&v4l2->vbi_dev)) {
		em28xx_info("V4L2 device %s deregistered\n",
			    video_device_node_name(&v4l2->vbi_dev));
		video_unregister_device(&v4l2->vbi_dev);
	}
	if (video_is_registered(&v4l2->vdev)) {
		em28xx_info("V4L2 device %s deregistered\n",
			    video_device_node_name(&v4l2->vdev));
		video_unregister_device(&v4l2->vdev);
	}

	v4l2_ctrl_handler_free(&v4l2->ctrl_handler);
	v4l2_device_unregister(&v4l2->v4l2_dev);
err:
	dev->v4l2 = NULL;
	kref_put(&v4l2->ref, em28xx_free_v4l2);
	mutex_unlock(&dev->lock);
	return ret;
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 1092 57.93% 22 37.93%
frank schaefer frank schaefer 570 30.24% 20 34.48%
hans verkuil hans verkuil 62 3.29% 3 5.17%
devin heitmueller devin heitmueller 57 3.02% 2 3.45%
robert krakora robert krakora 25 1.33% 1 1.72%
sascha sommer sascha sommer 25 1.33% 2 3.45%
laurent pinchart laurent pinchart 17 0.90% 3 5.17%
andrew morton andrew morton 16 0.85% 1 1.72%
douglas schilling landgraf douglas schilling landgraf 13 0.69% 1 1.72%
arnd bergmann arnd bergmann 5 0.27% 1 1.72%
eric sesterhenn eric sesterhenn 2 0.11% 1 1.72%
ezequiel garcia ezequiel garcia 1 0.05% 1 1.72%
Total 1885 100.00% 58 100.00%


static struct em28xx_ops v4l2_ops = {
	.id   = EM28XX_V4L2,
	.name = "Em28xx v4l2 Extension",
	.init = em28xx_v4l2_init,
	.fini = em28xx_v4l2_fini,
	.suspend = em28xx_v4l2_suspend,
	.resume = em28xx_v4l2_resume,
};



static int __init em28xx_video_register(void)
{
	return em28xx_register_extension(&v4l2_ops);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 16 100.00% 1 100.00%
Total 16 100.00% 1 100.00%



static void __exit em28xx_video_unregister(void)
{
	em28xx_unregister_extension(&v4l2_ops);
}

Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%


module_init(em28xx_video_register);

module_exit(em28xx_video_unregister);
Overall Contributors
Person Tokens Prop Commits CommitProp
mauro carvalho chehab mauro carvalho chehab 7017 52.22% 73 33.95%
frank schaefer frank schaefer 2754 20.50% 64 29.77%
devin heitmueller devin heitmueller 2161 16.08% 11 5.12%
hans verkuil hans verkuil 665 4.95% 32 14.88%
aidan thornton aidan thornton 271 2.02% 4 1.86%
andrew morton andrew morton 188 1.40% 1 0.47%
shuah khan shuah khan 90 0.67% 1 0.47%
douglas schilling landgraf douglas schilling landgraf 59 0.44% 3 1.40%
trent piepho trent piepho 54 0.40% 2 0.93%
junghak sung junghak sung 53 0.39% 2 0.93%
sascha sommer sascha sommer 41 0.31% 3 1.40%
robert krakora robert krakora 25 0.19% 1 0.47%
laurent pinchart laurent pinchart 18 0.13% 3 1.40%
alban browaeys alban browaeys 10 0.07% 1 0.47%
arnd bergmann arnd bergmann 5 0.04% 1 0.47%
nicola soranzo nicola soranzo 4 0.03% 1 0.47%
russell king russell king 3 0.02% 2 0.93%
tejun heo tejun heo 3 0.02% 1 0.47%
ingo molnar ingo molnar 3 0.02% 1 0.47%
ezequiel garcia ezequiel garcia 2 0.01% 1 0.47%
gianluca gennari gianluca gennari 2 0.01% 1 0.47%
sakari ailus sakari ailus 2 0.01% 1 0.47%
vitaly wool vitaly wool 2 0.01% 1 0.47%
eric sesterhenn eric sesterhenn 2 0.01% 1 0.47%
fengguang wu fengguang wu 1 0.01% 1 0.47%
markus rechberger markus rechberger 1 0.01% 1 0.47%
lucas de marchi lucas de marchi 1 0.01% 1 0.47%
Total 13437 100.00% 215 100.00%
  Directory: drivers/media/usb/em28xx

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
frank schaefer	frank schaefer	49	100.00%	2	100.00%
	Total	49	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/media/usb/em28xx/em28xx-video.c

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