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
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@ -23,43 +23,44 @@
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Some documentation about various registers as determined by trial and error.
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Register page 1:
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Address Description
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0x78 Global control, bit 6 controls the LED (inverted)
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Register page 3:
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Address Description
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0x02 Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on
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the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
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0x03 Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps
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0x04 Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps,
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63 -> ~27 fps, the 2 msb's must always be 1 !!
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0x05 Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0:
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1 -> ~30 fps, 2 -> ~20 fps
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0x0e Exposure bits 0-7, 0-448, 0 = use full frame time
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0x0f Exposure bit 8, 0-448, 448 = no exposure at all
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0x10 Master gain 0-31
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0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
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The registers are accessed in the following functions:
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Page | Register | Function
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-----+------------+---------------------------------------------------
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0 | 0x0f..0x20 | setcolors()
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0 | 0xa2..0xab | setbrightcont()
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0 | 0xc5 | setredbalance()
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0 | 0xc6 | setwhitebalance()
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0 | 0xc7 | setbluebalance()
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0 | 0xdc | setbrightcont(), setcolors()
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3 | 0x02 | setexposure()
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3 | 0x10 | setgain()
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3 | 0x11 | setcolors(), setgain(), setexposure(), sethvflip()
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3 | 0x21 | sethvflip()
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*/
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/*
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* Some documentation about various registers as determined by trial and error.
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*
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* Register page 1:
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*
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* Address Description
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* 0x78 Global control, bit 6 controls the LED (inverted)
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*
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* Register page 3:
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*
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* Address Description
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* 0x02 Clock divider 3-63, fps = 90 / val. Must be a multiple of 3 on
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* the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
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* 0x03 Variable framerate ctrl reg2==3: 0 -> ~30 fps, 255 -> ~22fps
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* 0x04 Another var framerate ctrl reg2==3, reg3==0: 0 -> ~30 fps,
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* 63 -> ~27 fps, the 2 msb's must always be 1 !!
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* 0x05 Another var framerate ctrl reg2==3, reg3==0, reg4==0xc0:
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* 1 -> ~30 fps, 2 -> ~20 fps
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* 0x0e Exposure bits 0-7, 0-448, 0 = use full frame time
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* 0x0f Exposure bit 8, 0-448, 448 = no exposure at all
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* 0x10 Master gain 0-31
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* 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
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*
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* The registers are accessed in the following functions:
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*
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* Page | Register | Function
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* -----+------------+---------------------------------------------------
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* 0 | 0x0f..0x20 | setcolors()
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* 0 | 0xa2..0xab | setbrightcont()
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* 0 | 0xc5 | setredbalance()
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* 0 | 0xc6 | setwhitebalance()
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* 0 | 0xc7 | setbluebalance()
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* 0 | 0xdc | setbrightcont(), setcolors()
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* 3 | 0x02 | setexposure()
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* 3 | 0x10 | setgain()
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* 3 | 0x11 | setcolors(), setgain(), setexposure(), sethvflip()
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* 3 | 0x21 | sethvflip()
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@ -600,28 +601,36 @@ static void setexposure(struct gspca_dev *gspca_dev)
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u8 clockdiv;
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u16 exposure;
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/* register 2 of frame 3 contains the clock divider configuring the
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no fps according to the formula: 90 / reg. sd->exposure is the
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desired exposure time in 0.5 ms. */
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/*
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* Register 2 of frame 3 contains the clock divider configuring the
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* no fps according to the formula: 90 / reg. sd->exposure is the
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* desired exposure time in 0.5 ms.
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*/
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clockdiv = (90 * sd->ctrls[EXPOSURE].val + 1999) / 2000;
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/* Note clockdiv = 3 also works, but when running at 30 fps, depending
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on the scene being recorded, the camera switches to another
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quantization table for certain JPEG blocks, and we don't know how
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to decompress these blocks. So we cap the framerate at 15 fps */
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/*
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* Note clockdiv = 3 also works, but when running at 30 fps, depending
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* on the scene being recorded, the camera switches to another
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* quantization table for certain JPEG blocks, and we don't know how
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* to decompress these blocks. So we cap the framerate at 15 fps.
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*/
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if (clockdiv < 6)
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clockdiv = 6;
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else if (clockdiv > 63)
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clockdiv = 63;
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/* reg2 MUST be a multiple of 3, except when between 6 and 12?
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Always round up, otherwise we cannot get the desired frametime
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using the partial frame time exposure control */
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/*
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* Register 2 MUST be a multiple of 3, except when between 6 and 12?
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* Always round up, otherwise we cannot get the desired frametime
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* using the partial frame time exposure control.
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*/
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if (clockdiv < 6 || clockdiv > 12)
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clockdiv = ((clockdiv + 2) / 3) * 3;
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/* frame exposure time in ms = 1000 * clockdiv / 90 ->
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exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90) */
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/*
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* frame exposure time in ms = 1000 * clockdiv / 90 ->
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* exposure = (sd->exposure / 2) * 448 / (1000 * clockdiv / 90)
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*/
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exposure = (sd->ctrls[EXPOSURE].val * 45 * 448) / (1000 * clockdiv);
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/* 0 = use full frametime, 448 = no exposure, reverse it */
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exposure = 448 - exposure;
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@ -639,10 +648,12 @@ static void setautogain(struct gspca_dev *gspca_dev)
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{
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struct sd *sd = (struct sd *) gspca_dev;
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/* when switching to autogain set defaults to make sure
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we are on a valid point of the autogain gain /
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exposure knee graph, and give this change time to
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take effect before doing autogain. */
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/*
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* When switching to autogain set defaults to make sure
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* we are on a valid point of the autogain gain /
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* exposure knee graph, and give this change time to
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* take effect before doing autogain.
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*/
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if (sd->ctrls[AUTOGAIN].val) {
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sd->ctrls[EXPOSURE].val = EXPOSURE_DEF;
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sd->ctrls[GAIN].val = GAIN_DEF;
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@ -784,10 +795,12 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
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if (sof) {
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int n, lum_offset, footer_length;
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/* 6 bytes after the FF D9 EOF marker a number of lumination
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bytes are send corresponding to different parts of the
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image, the 14th and 15th byte after the EOF seem to
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correspond to the center of the image */
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/*
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* 6 bytes after the FF D9 EOF marker a number of lumination
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* bytes are send corresponding to different parts of the
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* image, the 14th and 15th byte after the EOF seem to
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* correspond to the center of the image.
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*/
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lum_offset = 61 + sizeof pac_sof_marker;
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footer_length = 74;
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@ -831,9 +844,10 @@ static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
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u8 index;
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u8 value;
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/* reg->reg: bit0..15: reserved for register index (wIndex is 16bit
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long on the USB bus)
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*/
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/*
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* reg->reg: bit0..15: reserved for register index (wIndex is 16bit
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* long on the USB bus)
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*/
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if (reg->match.type == V4L2_CHIP_MATCH_HOST &&
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reg->match.addr == 0 &&
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(reg->reg < 0x000000ff) &&
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@ -844,9 +858,11 @@ static int sd_dbg_s_register(struct gspca_dev *gspca_dev,
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index = reg->reg;
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value = reg->val;
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/* Note that there shall be no access to other page
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by any other function between the page swith and
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the actual register write */
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/*
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* Note that there shall be no access to other page
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* by any other function between the page switch and
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* the actual register write.
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*/
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reg_w(gspca_dev, 0xff, 0x00); /* page 0 */
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reg_w(gspca_dev, index, value);
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