diff options
| author | Hans Verkuil <hans.verkuil@cisco.com> | 2013-03-24 08:24:19 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-24 08:46:39 -0300 |
| commit | b5656e8b7363c4e248e6372dc34828d3dfb17832 (patch) | |
| tree | fabec0fa0c862931c3987aeea538d4348de6a972 /drivers/media/pci | |
| parent | 27d5a87cf4b44cbcbd0f4706a433e4a68d496236 (diff) | |
[media] ivtv: prepare ivtv for adding const to s_register
The ivtv_itvc function receives a pointer to v4l2_dbg_register. When we
add const to that pointer in the s_register case we will run into a problem
here since this common function would discard const in that case. So
change this function so it receives the address and a pointer to a value.
In addition we now set the size field in the g_register function which is
where it belongs.
This will simplify the next patch where const will be added to s_register.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/pci')
| -rw-r--r-- | drivers/media/pci/ivtv/ivtv-ioctl.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/drivers/media/pci/ivtv/ivtv-ioctl.c b/drivers/media/pci/ivtv/ivtv-ioctl.c index 080f179070a..861e4629c7f 100644 --- a/drivers/media/pci/ivtv/ivtv-ioctl.c +++ b/drivers/media/pci/ivtv/ivtv-ioctl.c @@ -711,28 +711,26 @@ static int ivtv_g_chip_ident(struct file *file, void *fh, struct v4l2_dbg_chip_i } #ifdef CONFIG_VIDEO_ADV_DEBUG -static int ivtv_itvc(struct ivtv *itv, unsigned int cmd, void *arg) +static int ivtv_itvc(struct ivtv *itv, bool get, u64 reg, u64 *val) { - struct v4l2_dbg_register *regs = arg; volatile u8 __iomem *reg_start; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - if (regs->reg >= IVTV_REG_OFFSET && regs->reg < IVTV_REG_OFFSET + IVTV_REG_SIZE) + if (reg >= IVTV_REG_OFFSET && reg < IVTV_REG_OFFSET + IVTV_REG_SIZE) reg_start = itv->reg_mem - IVTV_REG_OFFSET; - else if (itv->has_cx23415 && regs->reg >= IVTV_DECODER_OFFSET && - regs->reg < IVTV_DECODER_OFFSET + IVTV_DECODER_SIZE) + else if (itv->has_cx23415 && reg >= IVTV_DECODER_OFFSET && + reg < IVTV_DECODER_OFFSET + IVTV_DECODER_SIZE) reg_start = itv->dec_mem - IVTV_DECODER_OFFSET; - else if (regs->reg < IVTV_ENCODER_SIZE) + else if (reg < IVTV_ENCODER_SIZE) reg_start = itv->enc_mem; else return -EINVAL; - regs->size = 4; - if (cmd == VIDIOC_DBG_G_REGISTER) - regs->val = readl(regs->reg + reg_start); + if (get) + *val = readl(reg + reg_start); else - writel(regs->val, regs->reg + reg_start); + writel(*val, reg + reg_start); return 0; } @@ -740,8 +738,10 @@ static int ivtv_g_register(struct file *file, void *fh, struct v4l2_dbg_register { struct ivtv *itv = fh2id(fh)->itv; - if (v4l2_chip_match_host(®->match)) - return ivtv_itvc(itv, VIDIOC_DBG_G_REGISTER, reg); + if (v4l2_chip_match_host(®->match)) { + reg->size = 4; + return ivtv_itvc(itv, true, reg->reg, ®->val); + } /* TODO: subdev errors should not be ignored, this should become a subdev helper function. */ ivtv_call_all(itv, core, g_register, reg); @@ -753,7 +753,7 @@ static int ivtv_s_register(struct file *file, void *fh, struct v4l2_dbg_register struct ivtv *itv = fh2id(fh)->itv; if (v4l2_chip_match_host(®->match)) - return ivtv_itvc(itv, VIDIOC_DBG_S_REGISTER, reg); + return ivtv_itvc(itv, false, reg->reg, ®->val); /* TODO: subdev errors should not be ignored, this should become a subdev helper function. */ ivtv_call_all(itv, core, s_register, reg); |