diff options
| author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-22 13:18:27 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-30 09:39:27 -0200 |
| commit | 531c98e71805b32e9ea35a218119100bbd2b7615 (patch) | |
| tree | 548f878b2d4abd66bee8d0fa0b19eeb9cf3182c9 /drivers/media/video/em28xx/em28xx-video.c | |
| parent | 4b00eb25340c1a9b9eedaf0bc5b0f0d18eddb028 (diff) | |
| download | lwn-531c98e71805b32e9ea35a218119100bbd2b7615.tar.gz lwn-531c98e71805b32e9ea35a218119100bbd2b7615.zip | |
V4L/DVB (9953): em28xx: Add suport for debugging AC97 anciliary chips
The em28xx driver can be coupled to an anciliary AC97 chip. This patch
allows read/write AC97 registers directly.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/em28xx/em28xx-video.c')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 4701b6589b10..4ea4920c927a 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1221,6 +1221,17 @@ 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) { + mutex_lock(&dev->lock); + ret = em28xx_read_ac97(dev, reg->reg); + mutex_unlock(&dev->lock); + if (ret < 0) + return ret; + + reg->val = ret; + return 0; + } + if (!v4l2_chip_match_host(reg->match_type, reg->match_chip)) return -EINVAL; @@ -1256,6 +1267,14 @@ static int vidioc_s_register(struct file *file, void *priv, __le64 buf; int rc; + if (reg->match_type == V4L2_CHIP_MATCH_AC97) { + mutex_lock(&dev->lock); + rc = em28xx_write_ac97(dev, reg->reg, reg->val); + mutex_unlock(&dev->lock); + + return rc; + } + buf = cpu_to_le64(reg->val); mutex_lock(&dev->lock); |