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Commit 14983d81 authored by Mauro Carvalho Chehab's avatar Mauro Carvalho Chehab
Browse files

V4L/DVB (9970): em28xx: Allow get/set registers for debug on i2c slave chips 



Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent bc974305

drivers/media/video/em28xx/em28xx-video.c

+41 −5
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ 
#include "em28xx.h"

#include <media/v4l2-common.h>

#include <media/v4l2-ioctl.h>

#include <media/v4l2-chip-ident.h>

#include <media/msp3400.h>

#include <media/tuner.h>
@@ -1214,6 +1215,21 @@ static int em28xx_reg_len(int reg) 
	}

}



static int vidioc_g_chip_ident(struct file *file, void *priv,

	       struct v4l2_chip_ident *chip)

{

	struct em28xx_fh      *fh  = priv;

	struct em28xx         *dev = fh->dev;



	chip->ident = V4L2_IDENT_NONE;

	chip->revision = 0;



	em28xx_i2c_call_clients(dev, VIDIOC_G_CHIP_IDENT, chip);



	return 0;

}





static int vidioc_g_register(struct file *file, void *priv,

			     struct v4l2_register *reg)

{
@@ -1221,7 +1237,8 @@ static int vidioc_g_register(struct file *file, void *priv, 
	struct em28xx         *dev = fh->dev;

	int ret;



	if (reg->match_type == V4L2_CHIP_MATCH_AC97) {

	switch (reg->match_type) {

	case V4L2_CHIP_MATCH_AC97:

		mutex_lock(&dev->lock);

		ret = em28xx_read_ac97(dev, reg->reg);

		mutex_unlock(&dev->lock);
@@ -1230,11 +1247,18 @@ static int vidioc_g_register(struct file *file, void *priv, 


		reg->val = ret;

		return 0;

	}



	case V4L2_CHIP_MATCH_I2C_DRIVER:

		em28xx_i2c_call_clients(dev, VIDIOC_DBG_G_REGISTER, reg);

		return 0;

	case V4L2_CHIP_MATCH_I2C_ADDR:

		/* Not supported yet */

		return -EINVAL;

	default:

		if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))

			return -EINVAL;

	}



	/* Match host */

	if (em28xx_reg_len(reg->reg) == 1) {

		mutex_lock(&dev->lock);

		ret = em28xx_read_reg(dev, reg->reg);
@@ -1267,14 +1291,25 @@ static int vidioc_s_register(struct file *file, void *priv, 
	__le64 buf;

	int    rc;



	if (reg->match_type == V4L2_CHIP_MATCH_AC97) {

	switch (reg->match_type) {

	case V4L2_CHIP_MATCH_AC97:

		mutex_lock(&dev->lock);

		rc = em28xx_write_ac97(dev, reg->reg, reg->val);

		mutex_unlock(&dev->lock);



		return rc;

	case V4L2_CHIP_MATCH_I2C_DRIVER:

		em28xx_i2c_call_clients(dev, VIDIOC_DBG_S_REGISTER, reg);

		return 0;

	case V4L2_CHIP_MATCH_I2C_ADDR:

		/* Not supported yet */

		return -EINVAL;

	default:

		if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))

			return -EINVAL;

	}



	/* Match host */

	buf = cpu_to_le64(reg->val);



	mutex_lock(&dev->lock);
@@ -1927,6 +1962,7 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = { 
#ifdef CONFIG_VIDEO_ADV_DEBUG

	.vidioc_g_register          = vidioc_g_register,

	.vidioc_s_register          = vidioc_s_register,

	.vidioc_g_chip_ident        = vidioc_g_chip_ident,

#endif

#ifdef CONFIG_VIDEO_V4L1_COMPAT

	.vidiocgmbuf                = vidiocgmbuf,