From 57f1a4de9c25fb0d892c1dfd2369b99fa84b1406 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 22 Dec 2008 21:58:41 -0200 Subject: em28xx: Allow get/set registers for debug on i2c slave chips From: Mauro Carvalho Chehab Signed-off-by: Mauro Carvalho Chehab --- linux/drivers/media/video/em28xx/em28xx-video.c | 46 ++++++++++++++++++++++--- 1 file changed, 41 insertions(+), 5 deletions(-) (limited to 'linux/drivers') diff --git a/linux/drivers/media/video/em28xx/em28xx-video.c b/linux/drivers/media/video/em28xx/em28xx-video.c index 4d9b167e6..9a7f57c8b 100644 --- a/linux/drivers/media/video/em28xx/em28xx-video.c +++ b/linux/drivers/media/video/em28xx/em28xx-video.c @@ -39,6 +39,7 @@ #include "em28xx.h" #include #include +#include #include #include @@ -1226,6 +1227,21 @@ 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) { @@ -1233,7 +1249,8 @@ 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); @@ -1242,11 +1259,18 @@ static int vidioc_g_register(struct file *file, void *priv, reg->val = ret; return 0; - } - - if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) + 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); @@ -1279,14 +1303,25 @@ 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); @@ -1996,6 +2031,7 @@ 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, -- cgit v1.2.3