mirror of https://gitee.com/openkylin/linux.git
[media] gspca_pac7302: Convert multi-line comments to standard kernel style
Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede
Mauro Carvalho Chehab
parent
282ddfbcab
commit
895d464db6
|
|
@ -23,43 +23,44 @@
|
|||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
/* Some documentation about various registers as determined by trial and error.
|
||||
|
||||
Register page 1:
|
||||
|
||||
Address Description
|
||||
0x78 Global control, bit 6 controls the LED (inverted)
|
||||
|
||||
Register page 3:
|
||||
|
||||
Address Description
|
||||
0x02 Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on
|
||||
the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
|
||||
0x03 Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps
|
||||
0x04 Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps,
|
||||
63 -> ~27 fps, the 2 msb's must always be 1 !!
|
||||
0x05 Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0:
|
||||
1 -> ~30 fps, 2 -> ~20 fps
|
||||
0x0e Exposure bits 0-7, 0-448, 0 = use full frame time
|
||||
0x0f Exposure bit 8, 0-448, 448 = no exposure at all
|
||||
0x10 Master gain 0-31
|
||||
0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
|
||||
|
||||
The registers are accessed in the following functions:
|
||||
|
||||
Page | Register | Function
|
||||
-----+------------+---------------------------------------------------
|
||||
0 | 0x0f..0x20 | setcolors()
|
||||
0 | 0xa2..0xab | setbrightcont()
|
||||
0 | 0xc5 | setredbalance()
|
||||
0 | 0xc6 | setwhitebalance()
|
||||
0 | 0xc7 | setbluebalance()
|
||||
0 | 0xdc | setbrightcont(), setcolors()
|
||||
3 | 0x02 | setexposure()
|
||||
3 | 0x10 | setgain()
|
||||
3 | 0x11 | setcolors(), setgain(), setexposure(), sethvflip()
|
||||
3 | 0x21 | sethvflip()
|
||||
*/
|
||||
/*
|
||||
* Some documentation about various registers as determined by trial and error.
|
||||
*
|
||||
* Register page 1:
|
||||
*
|
||||
* Address Description
|
||||
* 0x78 Global control, bit 6 controls the LED (inverted)
|
||||
*
|
||||
* Register page 3:
|
||||
*
|
||||
* Address Description
|
||||
* 0x02 Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on
|
||||
* the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
|
||||
* 0x03 Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps
|
||||
* 0x04 Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps,
|
||||
* 63 -> ~27 fps, the 2 msb's must always be 1 !!
|
||||
* 0x05 Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0:
|
||||
* 1 -> ~30 fps, 2 -> ~20 fps
|
||||
* 0x0e Exposure bits 0-7, 0-448, 0 = use full frame time
|
||||
* 0x0f Exposure bit 8, 0-448, 448 = no exposure at all
|
||||
* 0x10 Master gain 0-31
|
||||
* 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
|
||||
*
|
||||
* The registers are accessed in the following functions:
|
||||
*
|
||||
* Page | Register | Function
|
||||
* -----+------------+---------------------------------------------------
|
||||
* 0 | 0x0f..0x20 | setcolors()
|
||||
* 0 | 0xa2..0xab | setbrightcont()
|
||||
* 0 | 0xc5 | setredbalance()
|
||||
* 0 | 0xc6 | setwhitebalance()
|
||||
* 0 | 0xc7 | setbluebalance()
|
||||
* 0 | 0xdc | setbrightcont(), setcolors()
|
||||
* 3 | 0x02 | setexposure()
|
||||
* 3 | 0x10 | setgain()
|
||||
* 3 | 0x11 | setcolors(), setgain(), setexposure(), sethvflip()
|
||||
* 3 | 0x21 | sethvflip()
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
|
|
@ -600,28 +601,36 @@ static void setexposure(struct gspca_dev *gspca_dev)
|
|||
u8 clockdiv;
|
||||
u16 exposure;
|
||||
|
||||
/* register 2 of frame 3 contains the clock divider configuring the
|
||||
no fps according to the formula: 90 / reg. sd->exposure is the
|
||||
desired exposure time in 0.5 ms. */
|
||||
/*
|
||||
* Register 2 of frame 3 contains the clock divider configuring the
|
||||
* no fps according to the formula: 90 / reg. sd->exposure is the
|
||||
* desired exposure time in 0.5 ms.
|
||||
*/
|
||||
clockdiv = (90 * sd->ctrls[EXPOSURE].val + 1999) / 2000;
|
||||
|
||||
/* Note clockdiv = 3 also works, but when running at 30 fps, depending
|
||||
on the scene being recorded, the camera switches to another
|
||||
quantization table for certain JPEG blocks, and we don't know how
|
||||
to decompress these blocks. So we cap the framerate at 15 fps */
|
||||
/*
|
||||
* Note clockdiv = 3 also works, but when running at 30 fps, depending
|
||||
* on the scene being recorded, the camera switches to another
|
||||
* quantization table for certain JPEG blocks, and we don't know how
|
||||
* to decompress these blocks. So we cap the framerate at 15 fps.
|
||||
*/
|
||||
if (clockdiv < 6)
|
||||
clockdiv = 6;
|
||||
else if (clockdiv > 63)
|
||||
clockdiv = 63;
|
||||
|
||||
/* reg2 MUST be a multiple of 3, except when between 6 and 12?
|
||||
Always round up, otherwise we cannot get the desired frametime
|
||||
using the partial frame time exposure control */
|
||||
/*
|
||||
* Register 2 MUST be a multiple of 3, except when between 6 and 12?
|
||||
* Always round up, otherwise we cannot get the desired frametime
|
||||
* using the partial frame time exposure control.
|
||||
*/
|
||||
if (clockdiv < 6 || clockdiv > 12)
|
||||
clockdiv = ((clockdiv + 2) / 3) * 3;
|
||||
|
||||
/* frame exposure time in ms = 1000 * clockdiv / 90 ->
|
||||
exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90) */
|
||||
/*
|
||||
* frame exposure time in ms = 1000 * clockdiv / 90 ->
|
||||
* exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90)
|
||||
*/
|
||||
exposure = (sd->ctrls[EXPOSURE].val * 45 * 448) / (1000 * clockdiv);
|
||||
/* 0 = use full frametime, 448 = no exposure, reverse it */
|
||||
exposure = 448 - exposure;
|
||||
|
|
@ -639,10 +648,12 @@ static void setautogain(struct gspca_dev *gspca_dev)
|
|||
{
|
||||
struct sd *sd = (struct sd *) gspca_dev;
|
||||
|
||||
/* when switching to autogain set defaults to make sure
|
||||
we are on a valid point of the autogain gain /
|
||||
exposure knee graph, and give this change time to
|
||||
take effect before doing autogain. */
|
||||
/*
|
||||
* When switching to autogain set defaults to make sure
|
||||
* we are on a valid point of the autogain gain /
|
||||
* exposure knee graph, and give this change time to
|
||||
* take effect before doing autogain.
|
||||
*/
|
||||
if (sd->ctrls[AUTOGAIN].val) {
|
||||
sd->ctrls[EXPOSURE].val = EXPOSURE_DEF;
|
||||
sd->ctrls[GAIN].val = GAIN_DEF;
|
||||
|
|
@ -784,10 +795,12 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
|
|||
if (sof) {
|
||||
int n, lum_offset, footer_length;
|
||||
|
||||
/* 6 bytes after the FF D9 EOF marker a number of lumination
|
||||
bytes are send corresponding to different parts of the
|
||||
image, the 14th and 15th byte after the EOF seem to
|
||||
correspond to the center of the image */
|
||||
/*
|
||||
* 6 bytes after the FF D9 EOF marker a number of lumination
|
||||
* bytes are send corresponding to different parts of the
|
||||
* image, the 14th and 15th byte after the EOF seem to
|
||||
* correspond to the center of the image.
|
||||
*/
|
||||
lum_offset = 61 + sizeof pac_sof_marker;
|
||||
footer_length = 74;
|
||||
|
||||
|
|
@ -831,8 +844,9 @@ static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
|
|||
u8 index;
|
||||
u8 value;
|
||||
|
||||
/* reg->reg: bit0..15: reserved for register index (wIndex is 16bit
|
||||
long on the USB bus)
|
||||
/*
|
||||
* reg->reg: bit0..15: reserved for register index (wIndex is 16bit
|
||||
* long on the USB bus)
|
||||
*/
|
||||
if (reg->match.type == V4L2_CHIP_MATCH_HOST &&
|
||||
reg->match.addr == 0 &&
|
||||
|
|
@ -844,9 +858,11 @@ static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
|
|||
index = reg->reg;
|
||||
value = reg->val;
|
||||
|
||||
/* Note that there shall be no access to other page
|
||||
by any other function between the page swith and
|
||||
the actual register write */
|
||||
/*
|
||||
* Note that there shall be no access to other page
|
||||
* by any other function between the page switch and
|
||||
* the actual register write.
|
||||
*/
|
||||
reg_w(gspca_dev, 0xff, 0x00); /* page 0 */
|
||||
reg_w(gspca_dev, index, value);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue