*/
/* Some documentation about various registers as determined by trial and error.
-
- Register page 1:
-
- Address Description
- 0x08 Unknown compressor related, must always be 8 except when not
- in 640x480 resolution and page 4 reg 2 <= 3 then set it to 9 !
- 0x1b Auto white balance related, bit 0 is AWB enable (inverted)
- bits 345 seem to toggle per color gains on/off (inverted)
- 0x78 Global control, bit 6 controls the LED (inverted)
- 0x80 JPEG compression ratio ? Best not touched
-
- Register page 4:
-
- Address Description
- 0x02 Clock divider 2-63, fps =~ 60 / val. Must be a multiple of 3 on
- the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
- 0x0f Master gain 1-245, low value = high gain
- 0x10 Another gain 0-15, limited influence (1-2x gain I guess)
- 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
- 0x27 Seems to toggle various gains on / off, Setting bit 7 seems to
- completely disable the analog amplification block. Set to 0x68
- for max gain, 0x14 for minimal gain.
-*/
+ *
+ * Register page 1:
+ *
+ * Address Description
+ * 0x08 Unknown compressor related, must always be 8 except when not
+ * in 640x480 resolution and page 4 reg 2 <= 3 then set it to 9 !
+ * 0x1b Auto white balance related, bit 0 is AWB enable (inverted)
+ * bits 345 seem to toggle per color gains on/off (inverted)
+ * 0x78 Global control, bit 6 controls the LED (inverted)
+ * 0x80 JPEG compression ratio ? Best not touched
+ *
+ * Register page 4:
+ *
+ * Address Description
+ * 0x02 Clock divider 2-63, fps =~ 60 / val. Must be a multiple of 3 on
+ * the 7302, so one of 3, 6, 9, ..., except when between 6 and 12?
+ * 0x0f Master gain 1-245, low value = high gain
+ * 0x10 Another gain 0-15, limited influence (1-2x gain I guess)
+ * 0x21 Bitfield: 0-1 unused, 2-3 vflip/hflip, 4-5 unknown, 6-7 unused
+ * 0x27 Seems to toggle various gains on / off, Setting bit 7 seems to
+ * completely disable the analog amplification block. Set to 0x68
+ * for max gain, 0x14 for minimal gain.
+ */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
/* load registers to sensor (Bit 0, auto clear) */
reg_w(gspca_dev, 0x11, 0x01);
- /* Page 1 register 8 must always be 0x08 except when not in
- 640x480 mode and page 4 reg 2 <= 3 then it must be 9 */
+ /*
+ * Page 1 register 8 must always be 0x08 except when not in
+ * 640x480 mode and page 4 reg 2 <= 3 then it must be 9
+ */
reg_w(gspca_dev, 0xff, 0x01);
if (gspca_dev->cam.cam_mode[(int)gspca_dev->curr_mode].priv &&
sd->ctrls[EXPOSURE].val <= 3) {
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 = 24 + sizeof pac_sof_marker;
footer_length = 26;