diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/DocBook/media/v4l/compat.xml | 12 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/controls.xml | 41 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/dev-overlay.xml | 9 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/media-ioc-enum-links.xml | 9 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/subdev-formats.xml | 163 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/v4l2.xml | 10 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-cropcap.xml | 10 | ||||
| -rw-r--r-- | Documentation/DocBook/media/v4l/vidioc-streamon.xml | 2 | ||||
| -rw-r--r-- | Documentation/cgroups/resource_counter.txt | 2 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt | 11 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/media/samsung-s5k5baf.txt | 58 | ||||
| -rw-r--r-- | Documentation/video4linux/omap4_camera.txt | 60 | ||||
| -rw-r--r-- | Documentation/video4linux/si476x.txt | 2 | ||||
| -rw-r--r-- | Documentation/video4linux/sn9c102.txt | 592 |
14 files changed, 369 insertions, 612 deletions
diff --git a/Documentation/DocBook/media/v4l/compat.xml b/Documentation/DocBook/media/v4l/compat.xml index 0c7195e3e093..c4cac6dbf9af 100644 --- a/Documentation/DocBook/media/v4l/compat.xml +++ b/Documentation/DocBook/media/v4l/compat.xml @@ -2523,6 +2523,18 @@ that used it. It was originally scheduled for removal in 2.6.35. </orderedlist> </section> + <section> + <title>V4L2 in Linux 3.14</title> + <orderedlist> + <listitem> + <para> In struct <structname>v4l2_rect</structname>, the type +of <structfield>width</structfield> and <structfield>height</structfield> +fields changed from _s32 to _u32. + </para> + </listitem> + </orderedlist> + </section> + <section id="other"> <title>Relation of V4L2 to other Linux multimedia APIs</title> diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml index 7a3b49b3cc3b..a5a3188e5af7 100644 --- a/Documentation/DocBook/media/v4l/controls.xml +++ b/Documentation/DocBook/media/v4l/controls.xml @@ -3161,6 +3161,47 @@ V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD as a golden frame.</entry> </entrytbl> </row> + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_MIN_QP</constant></entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Minimum quantization parameter for VP8.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_MAX_QP</constant></entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Maximum quantization parameter for VP8.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Quantization parameter for an I frame for VP8.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Quantization parameter for a P frame for VP8.</entry> + </row> + + <row><entry></entry></row> + <row> + <entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_VPX_PROFILE</constant> </entry> + <entry>integer</entry> + </row> + <row><entry spanname="descr">Select the desired profile for VPx encoder. +Acceptable values are 0, 1, 2 and 3 corresponding to encoder profiles 0, 1, 2 and 3.</entry> + </row> + <row><entry></entry></row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/dev-overlay.xml b/Documentation/DocBook/media/v4l/dev-overlay.xml index 40d1d7681439..cc6e0c5c960c 100644 --- a/Documentation/DocBook/media/v4l/dev-overlay.xml +++ b/Documentation/DocBook/media/v4l/dev-overlay.xml @@ -346,17 +346,14 @@ rectangle, in pixels.</entry> rectangle, in pixels. Offsets increase to the right and down.</entry> </row> <row> - <entry>__s32</entry> + <entry>__u32</entry> <entry><structfield>width</structfield></entry> <entry>Width of the rectangle, in pixels.</entry> </row> <row> - <entry>__s32</entry> + <entry>__u32</entry> <entry><structfield>height</structfield></entry> - <entry>Height of the rectangle, in pixels. Width and -height cannot be negative, the fields are signed for hysterical -reasons. <!-- video4linux-list@redhat.com on 22 Oct 2002 subject -"Re:[V4L][patches!] Re:v4l2/kernel-2.5" --></entry> + <entry>Height of the rectangle, in pixels.</entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml b/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml index 355df43badc5..cf8548556c7d 100644 --- a/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml +++ b/Documentation/DocBook/media/v4l/media-ioc-enum-links.xml @@ -134,6 +134,15 @@ <entry>Output pad, relative to the entity. Output pads source data and are origins of links.</entry> </row> + <row> + <entry><constant>MEDIA_PAD_FL_MUST_CONNECT</constant></entry> + <entry>If this flag is set and the pad is linked to any other + pad, then at least one of those links must be enabled for the + entity to be able to stream. There could be temporary reasons + (e.g. device configuration dependent) for the pad to need + enabled links even when this flag isn't set; the absence of the + flag doesn't imply there is none.</entry> + </row> </tbody> </tgroup> </table> diff --git a/Documentation/DocBook/media/v4l/subdev-formats.xml b/Documentation/DocBook/media/v4l/subdev-formats.xml index f72c1cc93a9b..7331ce116f4c 100644 --- a/Documentation/DocBook/media/v4l/subdev-formats.xml +++ b/Documentation/DocBook/media/v4l/subdev-formats.xml @@ -89,7 +89,7 @@ <constant>V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE</constant>. </para> - <para>The following tables list existing packet RGB formats.</para> + <para>The following tables list existing packed RGB formats.</para> <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-rgb"> <title>RGB formats</title> @@ -615,7 +615,7 @@ </mediaobject> </figure> - <para>The following table lists existing packet Bayer formats. The data + <para>The following table lists existing packed Bayer formats. The data organization is given as an example for the first pixel only.</para> <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-bayer"> @@ -1178,7 +1178,7 @@ U, Y, V, Y order will be named <constant>V4L2_MBUS_FMT_UYVY8_2X8</constant>. </para> - <para><xref linkend="v4l2-mbus-pixelcode-yuv8"/> list existing packet YUV + <para><xref linkend="v4l2-mbus-pixelcode-yuv8"/> lists existing packed YUV formats and describes the organization of each pixel data in each sample. When a format pattern is split across multiple samples each of the samples in the pattern is described.</para> @@ -2492,6 +2492,163 @@ </section> <section> + <title>HSV/HSL Formats</title> + + <para>Those formats transfer pixel data as RGB values in a cylindrical-coordinate + system using Hue-Saturation-Value or Hue-Saturation-Lightness components. The + format code is made of the following information. + <itemizedlist> + <listitem><para>The hue, saturation, value or lightness and optional alpha + components order code, as encoded in a pixel sample. The only currently + supported value is AHSV. + </para></listitem> + <listitem><para>The number of bits per component, for each component. The values + can be different for all components. The only currently supported value is 8888. + </para></listitem> + <listitem><para>The number of bus samples per pixel. Pixels that are wider than + the bus width must be transferred in multiple samples. The only currently + supported value is 1.</para></listitem> + <listitem><para>The bus width.</para></listitem> + <listitem><para>For formats where the total number of bits per pixel is smaller + than the number of bus samples per pixel times the bus width, a padding + value stating if the bytes are padded in their most high order bits + (PADHI) or low order bits (PADLO).</para></listitem> + <listitem><para>For formats where the number of bus samples per pixel is larger + than 1, an endianness value stating if the pixel is transferred MSB first + (BE) or LSB first (LE).</para></listitem> + </itemizedlist> + </para> + + <para>The following table lists existing HSV/HSL formats.</para> + + <table pgwide="0" frame="none" id="v4l2-mbus-pixelcode-hsv"> + <title>HSV/HSL formats</title> + <tgroup cols="27"> + <colspec colname="id" align="left" /> + <colspec colname="code" align="center"/> + <colspec colname="bit" /> + <colspec colnum="4" colname="b31" align="center" /> + <colspec colnum="5" colname="b20" align="center" /> + <colspec colnum="6" colname="b29" align="center" /> + <colspec colnum="7" colname="b28" align="center" /> + <colspec colnum="8" colname="b27" align="center" /> + <colspec colnum="9" colname="b26" align="center" /> + <colspec colnum="10" colname="b25" align="center" /> + <colspec colnum="11" colname="b24" align="center" /> + <colspec colnum="12" colname="b23" align="center" /> + <colspec colnum="13" colname="b22" align="center" /> + <colspec colnum="14" colname="b21" align="center" /> + <colspec colnum="15" colname="b20" align="center" /> + <colspec colnum="16" colname="b19" align="center" /> + <colspec colnum="17" colname="b18" align="center" /> + <colspec colnum="18" colname="b17" align="center" /> + <colspec colnum="19" colname="b16" align="center" /> + <colspec colnum="20" colname="b15" align="center" /> + <colspec colnum="21" colname="b14" align="center" /> + <colspec colnum="22" colname="b13" align="center" /> + <colspec colnum="23" colname="b12" align="center" /> + <colspec colnum="24" colname="b11" align="center" /> + <colspec colnum="25" colname="b10" align="center" /> + <colspec colnum="26" colname="b09" align="center" /> + <colspec colnum="27" colname="b08" align="center" /> + <colspec colnum="28" colname="b07" align="center" /> + <colspec colnum="29" colname="b06" align="center" /> + <colspec colnum="30" colname="b05" align="center" /> + <colspec colnum="31" colname="b04" align="center" /> + <colspec colnum="32" colname="b03" align="center" /> + <colspec colnum="33" colname="b02" align="center" /> + <colspec colnum="34" colname="b01" align="center" /> + <colspec colnum="35" colname="b00" align="center" /> + <spanspec namest="b31" nameend="b00" spanname="b0" /> + <thead> + <row> + <entry>Identifier</entry> + <entry>Code</entry> + <entry></entry> + <entry spanname="b0">Data organization</entry> + </row> + <row> + <entry></entry> + <entry></entry> + <entry>Bit</entry> + <entry>31</entry> + <entry>30</entry> + <entry>29</entry> + <entry>28</entry> + <entry>27</entry> + <entry>26</entry> + <entry>25</entry> + <entry>24</entry> + <entry>23</entry> + <entry>22</entry> + <entry>21</entry> + <entry>20</entry> + <entry>19</entry> + <entry>18</entry> + <entry>17</entry> + <entry>16</entry> + <entry>15</entry> + <entry>14</entry> + <entry>13</entry> + <entry>12</entry> + <entry>11</entry> + <entry>10</entry> + <entry>9</entry> + <entry>8</entry> + <entry>7</entry> + <entry>6</entry> + <entry>5</entry> + <entry>4</entry> + <entry>3</entry> + <entry>2</entry> + <entry>1</entry> + <entry>0</entry> + </row> + </thead> + <tbody valign="top"> + <row id="V4L2-MBUS-FMT-AHSV8888-1X32"> + <entry>V4L2_MBUS_FMT_AHSV8888_1X32</entry> + <entry>0x6001</entry> + <entry></entry> + <entry>a<subscript>7</subscript></entry> + <entry>a<subscript>6</subscript></entry> + <entry>a<subscript>5</subscript></entry> + <entry>a<subscript>4</subscript></entry> + <entry>a<subscript>3</subscript></entry> + <entry>a<subscript>2</subscript></entry> + <entry>a<subscript>1</subscript></entry> + <entry>a<subscript>0</subscript></entry> + <entry>h<subscript>7</subscript></entry> + <entry>h<subscript>6</subscript></entry> + <entry>h<subscript>5</subscript></entry> + <entry>h<subscript>4</subscript></entry> + <entry>h<subscript>3</subscript></entry> + <entry>h<subscript>2</subscript></entry> + <entry>h<subscript>1</subscript></entry> + <entry>h<subscript>0</subscript></entry> + <entry>s<subscript>7</subscript></entry> + <entry>s<subscript>6</subscript></entry> + <entry>s<subscript>5</subscript></entry> + <entry>s<subscript>4</subscript></entry> + <entry>s<subscript>3</subscript></entry> + <entry>s<subscript>2</subscript></entry> + <entry>s<subscript>1</subscript></entry> + <entry>s<subscript>0</subscript></entry> + <entry>v<subscript>7</subscript></entry> + <entry>v<subscript>6</subscript></entry> + <entry>v<subscript>5</subscript></entry> + <entry>v<subscript>4</subscript></entry> + <entry>v<subscript>3</subscript></entry> + <entry>v<subscript>2</subscript></entry> + <entry>v<subscript>1</subscript></entry> + <entry>v<subscript>0</subscript></entry> + </row> + </tbody> + </tgroup> + </table> + </section> + + <section> <title>JPEG Compressed Formats</title> <para>Those data formats consist of an ordered sequence of 8-bit bytes diff --git a/Documentation/DocBook/media/v4l/v4l2.xml b/Documentation/DocBook/media/v4l/v4l2.xml index 8469fe13945c..74b7f27af71a 100644 --- a/Documentation/DocBook/media/v4l/v4l2.xml +++ b/Documentation/DocBook/media/v4l/v4l2.xml @@ -141,6 +141,14 @@ structs, ioctls) must be noted in more detail in the history chapter applications. --> <revision> + <revnumber>3.14</revnumber> + <date>2013-11-25</date> + <authorinitials>rr</authorinitials> + <revremark>Set width and height as unsigned on v4l2_rect. + </revremark> + </revision> + + <revision> <revnumber>3.11</revnumber> <date>2013-05-26</date> <authorinitials>hv</authorinitials> @@ -501,7 +509,7 @@ and discussions on the V4L mailing list.</revremark> </partinfo> <title>Video for Linux Two API Specification</title> - <subtitle>Revision 3.11</subtitle> + <subtitle>Revision 3.14</subtitle> <chapter id="common"> &sub-common; diff --git a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml index bf7cc979fdfa..1f5ed64cd75a 100644 --- a/Documentation/DocBook/media/v4l/vidioc-cropcap.xml +++ b/Documentation/DocBook/media/v4l/vidioc-cropcap.xml @@ -133,18 +133,14 @@ rectangle, in pixels.</entry> rectangle, in pixels.</entry> </row> <row> - <entry>__s32</entry> + <entry>__u32</entry> <entry><structfield>width</structfield></entry> <entry>Width of the rectangle, in pixels.</entry> </row> <row> - <entry>__s32</entry> + <entry>__u32</entry> <entry><structfield>height</structfield></entry> - <entry>Height of the rectangle, in pixels. Width -and height cannot be negative, the fields are signed for -hysterical reasons. <!-- video4linux-list@redhat.com -on 22 Oct 2002 subject "Re:[V4L][patches!] Re:v4l2/kernel-2.5" --> -</entry> + <entry>Height of the rectangle, in pixels.</entry> </row> </tbody> </tgroup> diff --git a/Documentation/DocBook/media/v4l/vidioc-streamon.xml b/Documentation/DocBook/media/v4l/vidioc-streamon.xml index 716ea15e54a1..65dff55079d7 100644 --- a/Documentation/DocBook/media/v4l/vidioc-streamon.xml +++ b/Documentation/DocBook/media/v4l/vidioc-streamon.xml @@ -59,7 +59,7 @@ buffers are filled (if there are any empty buffers in the incoming queue) until <constant>VIDIOC_STREAMON</constant> has been called. Accordingly the output hardware is disabled, no video signal is produced until <constant>VIDIOC_STREAMON</constant> has been called. -The ioctl will succeed only when at least one output buffer is in the +The ioctl will succeed when at least one output buffer is in the incoming queue.</para> <para>The <constant>VIDIOC_STREAMOFF</constant> ioctl, apart of diff --git a/Documentation/cgroups/resource_counter.txt b/Documentation/cgroups/resource_counter.txt index 52e1da16a309..5108afb3645c 100644 --- a/Documentation/cgroups/resource_counter.txt +++ b/Documentation/cgroups/resource_counter.txt @@ -95,7 +95,7 @@ to work with it. f. u64 res_counter_uncharge_until (struct res_counter *rc, struct res_counter *top, - unsinged long val) + unsigned long val) Almost same as res_counter_uncharge() but propagation of uncharge stops when rc == top. This is useful when kill a res_counter in diff --git a/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt new file mode 100644 index 000000000000..937b755baf8f --- /dev/null +++ b/Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt @@ -0,0 +1,11 @@ +Samsung S5P/EXYNOS SoC series JPEG codec + +Required properties: + +- compatible : should be one of: + "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg"; +- reg : address and length of the JPEG codec IP register set; +- interrupts : specifies the JPEG codec IP interrupt; +- clocks : should contain the JPEG codec IP gate clock specifier, from the + common clock bindings; +- clock-names : should contain "jpeg" entry. diff --git a/Documentation/devicetree/bindings/media/samsung-s5k5baf.txt b/Documentation/devicetree/bindings/media/samsung-s5k5baf.txt new file mode 100644 index 000000000000..1f51e0439c96 --- /dev/null +++ b/Documentation/devicetree/bindings/media/samsung-s5k5baf.txt @@ -0,0 +1,58 @@ +Samsung S5K5BAF UXGA 1/5" 2M CMOS Image Sensor with embedded SoC ISP +-------------------------------------------------------------------- + +Required properties: + +- compatible : "samsung,s5k5baf"; +- reg : I2C slave address of the sensor; +- vdda-supply : analog power supply 2.8V (2.6V to 3.0V); +- vddreg-supply : regulator input power supply 1.8V (1.7V to 1.9V) + or 2.8V (2.6V to 3.0); +- vddio-supply : I/O power supply 1.8V (1.65V to 1.95V) + or 2.8V (2.5V to 3.1V); +- stbyn-gpios : GPIO connected to STDBYN pin; +- rstn-gpios : GPIO connected to RSTN pin; +- clocks : list of phandle and clock specifier pairs + according to common clock bindings for the + clocks described in clock-names; +- clock-names : should include "mclk" for the sensor's master clock; + +Optional properties: + +- clock-frequency : the frequency at which the "mclk" clock should be + configured to operate, in Hz; if this property is not + specified default 24 MHz value will be used. + +The device node should contain one 'port' child node with one child 'endpoint' +node, according to the bindings defined in Documentation/devicetree/bindings/ +media/video-interfaces.txt. The following are properties specific to those +nodes. + +endpoint node +------------- + +- data-lanes : (optional) specifies MIPI CSI-2 data lanes as covered in + video-interfaces.txt. If present it should be <1> - the device + supports only one data lane without re-mapping. + +Example: + +s5k5bafx@2d { + compatible = "samsung,s5k5baf"; + reg = <0x2d>; + vdda-supply = <&cam_io_en_reg>; + vddreg-supply = <&vt_core_15v_reg>; + vddio-supply = <&vtcam_reg>; + stbyn-gpios = <&gpl2 0 1>; + rstn-gpios = <&gpl2 1 1>; + clock-names = "mclk"; + clocks = <&clock_cam 0>; + clock-frequency = <24000000>; + + port { + s5k5bafx_ep: endpoint { + remote-endpoint = <&csis1_ep>; + data-lanes = <1>; + }; + }; +}; diff --git a/Documentation/video4linux/omap4_camera.txt b/Documentation/video4linux/omap4_camera.txt new file mode 100644 index 000000000000..25d9b40a4651 --- /dev/null +++ b/Documentation/video4linux/omap4_camera.txt @@ -0,0 +1,60 @@ + OMAP4 ISS Driver + ================ + +Introduction +------------ + +The OMAP44XX family of chips contains the Imaging SubSystem (a.k.a. ISS), +Which contains several components that can be categorized in 3 big groups: + +- Interfaces (2 Interfaces: CSI2-A & CSI2-B/CCP2) +- ISP (Image Signal Processor) +- SIMCOP (Still Image Coprocessor) + +For more information, please look in [1] for latest version of: + "OMAP4430 Multimedia Device Silicon Revision 2.x" + +As of Revision AB, the ISS is described in detail in section 8. + +This driver is supporting _only_ the CSI2-A/B interfaces for now. + +It makes use of the Media Controller framework [2], and inherited most of the +code from OMAP3 ISP driver (found under drivers/media/platform/omap3isp/*), +except that it doesn't need an IOMMU now for ISS buffers memory mapping. + +Supports usage of MMAP buffers only (for now). + +Tested platforms +---------------- + +- OMAP4430SDP, w/ ES2.1 GP & SEVM4430-CAM-V1-0 (Contains IMX060 & OV5640, in + which only the last one is supported, outputting YUV422 frames). + +- TI Blaze MDP, w/ OMAP4430 ES2.2 EMU (Contains 1 IMX060 & 2 OV5650 sensors, in + which only the OV5650 are supported, outputting RAW10 frames). + +- PandaBoard, Rev. A2, w/ OMAP4430 ES2.1 GP & OV adapter board, tested with + following sensors: + * OV5640 + * OV5650 + +- Tested on mainline kernel: + + http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=summary + + Tag: v3.3 (commit c16fa4f2ad19908a47c63d8fa436a1178438c7e7) + +File list +--------- +drivers/staging/media/omap4iss/ +include/media/omap4iss.h + +References +---------- + +[1] http://focus.ti.com/general/docs/wtbu/wtbudocumentcenter.tsp?navigationId=12037&templateId=6123#62 +[2] http://lwn.net/Articles/420485/ +[3] http://www.spinics.net/lists/linux-media/msg44370.html +-- +Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> +Copyright (C) 2012, Texas Instruments diff --git a/Documentation/video4linux/si476x.txt b/Documentation/video4linux/si476x.txt index 2f9b4875ab8a..616607955aaf 100644 --- a/Documentation/video4linux/si476x.txt +++ b/Documentation/video4linux/si476x.txt @@ -147,7 +147,7 @@ The drivers exposes following files: -------------------------------------------------------------------- 0x12 | readfreq | Current tuned frequency -------------------------------------------------------------------- - 0x14 | freqoff | Singed frequency offset in units of + 0x14 | freqoff | Signed frequency offset in units of | | 2ppm -------------------------------------------------------------------- 0x15 | rssi | Signed value of RSSI in dBuV diff --git a/Documentation/video4linux/sn9c102.txt b/Documentation/video4linux/sn9c102.txt deleted file mode 100644 index b4f67040403a..000000000000 --- a/Documentation/video4linux/sn9c102.txt +++ /dev/null @@ -1,592 +0,0 @@ - - SN9C1xx PC Camera Controllers - Driver for Linux - ============================= - - - Documentation - - - -Index -===== -1. Copyright -2. Disclaimer -3. License -4. Overview and features -5. Module dependencies -6. Module loading -7. Module parameters -8. Optional device control through "sysfs" -9. Supported devices -10. Notes for V4L2 application developers -11. Video frame formats -12. Contact information -13. Credits - - -1. Copyright -============ -Copyright (C) 2004-2007 by Luca Risolia <luca.risolia@studio.unibo.it> - - -2. Disclaimer -============= -SONiX is a trademark of SONiX Technology Company Limited, inc. -This software is not sponsored or developed by SONiX. - - -3. License -========== -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - -4. Overview and features -======================== -This driver attempts to support the video interface of the devices assembling -the SONiX SN9C101, SN9C102, SN9C103, SN9C105 and SN9C120 PC Camera Controllers -("SN9C1xx" from now on). - -The driver relies on the Video4Linux2 and USB core modules. It has been -designed to run properly on SMP systems as well. - -The latest version of the SN9C1xx driver can be found at the following URL: -http://www.linux-projects.org/ - -Some of the features of the driver are: - -- full compliance with the Video4Linux2 API (see also "Notes for V4L2 - application developers" paragraph); -- available mmap or read/poll methods for video streaming through isochronous - data transfers; -- automatic detection of image sensor; -- support for built-in microphone interface; -- support for any window resolutions and optional panning within the maximum - pixel area of image sensor; -- image downscaling with arbitrary scaling factors from 1, 2 and 4 in both - directions (see "Notes for V4L2 application developers" paragraph); -- two different video formats for uncompressed or compressed data in low or - high compression quality (see also "Notes for V4L2 application developers" - and "Video frame formats" paragraphs); -- full support for the capabilities of many of the possible image sensors that - can be connected to the SN9C1xx bridges, including, for instance, red, green, - blue and global gain adjustments and exposure (see "Supported devices" - paragraph for details); -- use of default color settings for sunlight conditions; -- dynamic I/O interface for both SN9C1xx and image sensor control and - monitoring (see "Optional device control through 'sysfs'" paragraph); -- dynamic driver control thanks to various module parameters (see "Module - parameters" paragraph); -- up to 64 cameras can be handled at the same time; they can be connected and - disconnected from the host many times without turning off the computer, if - the system supports hotplugging; -- no known bugs. - - -5. Module dependencies -====================== -For it to work properly, the driver needs kernel support for Video4Linux and -USB. - -The following options of the kernel configuration file must be enabled and -corresponding modules must be compiled: - - # Multimedia devices - # - CONFIG_VIDEO_DEV=m - -To enable advanced debugging functionality on the device through /sysfs: - - # Multimedia devices - # - CONFIG_VIDEO_ADV_DEBUG=y - - # USB support - # - CONFIG_USB=m - -In addition, depending on the hardware being used, the modules below are -necessary: - - # USB Host Controller Drivers - # - CONFIG_USB_EHCI_HCD=m - CONFIG_USB_UHCI_HCD=m - CONFIG_USB_OHCI_HCD=m - -The SN9C103, SN9c105 and SN9C120 controllers also provide a built-in microphone -interface. It is supported by the USB Audio driver thanks to the ALSA API: - - # Sound - # - CONFIG_SOUND=y - - # Advanced Linux Sound Architecture - # - CONFIG_SND=m - - # USB devices - # - CONFIG_SND_USB_AUDIO=m - -And finally: - - # USB Multimedia devices - # - CONFIG_USB_SN9C102=m - - -6. Module loading -================= -To use the driver, it is necessary to load the "sn9c102" module into memory -after every other module required: "videodev", "v4l2_common", "compat_ioctl32", -"usbcore" and, depending on the USB host controller you have, "ehci-hcd", -"uhci-hcd" or "ohci-hcd". - -Loading can be done as shown below: - - [root@localhost home]# modprobe sn9c102 - -Note that the module is called "sn9c102" for historic reasons, although it -does not just support the SN9C102. - -At this point all the devices supported by the driver and connected to the USB -ports should be recognized. You can invoke "dmesg" to analyze kernel messages -and verify that the loading process has gone well: - - [user@localhost home]$ dmesg - -or, to isolate all the kernel messages generated by the driver: - - [user@localhost home]$ dmesg | grep sn9c102 - - -7. Module parameters -==================== -Module parameters are listed below: -------------------------------------------------------------------------------- -Name: video_nr -Type: short array (min = 0, max = 64) -Syntax: <-1|n[,...]> -Description: Specify V4L2 minor mode number: - -1 = use next available - n = use minor number n - You can specify up to 64 cameras this way. - For example: - video_nr=-1,2,-1 would assign minor number 2 to the second - recognized camera and use auto for the first one and for every - other camera. -Default: -1 -------------------------------------------------------------------------------- -Name: force_munmap -Type: bool array (min = 0, max = 64) -Syntax: <0|1[,...]> -Description: Force the application to unmap previously mapped buffer memory - before calling any VIDIOC_S_CROP or VIDIOC_S_FMT ioctl's. Not - all the applications support this feature. This parameter is - specific for each detected camera. - 0 = do not force memory unmapping - 1 = force memory unmapping (save memory) -Default: 0 -------------------------------------------------------------------------------- -Name: frame_timeout -Type: uint array (min = 0, max = 64) -Syntax: <0|n[,...]> -Description: Timeout for a video frame in seconds before returning an I/O - error; 0 for infinity. This parameter is specific for each - detected camera and can be changed at runtime thanks to the - /sys filesystem interface. -Default: 2 -------------------------------------------------------------------------------- -Name: debug -Type: ushort -Syntax: <n> -Description: Debugging information level, from 0 to 3: - 0 = none (use carefully) - 1 = critical errors - 2 = significant information - 3 = more verbose messages - Level 3 is useful for testing only. It also shows some more - information about the hardware being detected. - This parameter can be changed at runtime thanks to the /sys - filesystem interface. -Default: 2 -------------------------------------------------------------------------------- - - -8. Optional device control through "sysfs" [1] -========================================== -If the kernel has been compiled with the CONFIG_VIDEO_ADV_DEBUG option enabled, -it is possible to read and write both the SN9C1xx and the image sensor -registers by using the "sysfs" filesystem interface. - -Every time a supported device is recognized, a write-only file named "green" is -created in the /sys/class/video4linux/videoX directory. You can set the green -channel's gain by writing the desired value to it. The value may range from 0 -to 15 for the SN9C101 or SN9C102 bridges, from 0 to 127 for the SN9C103, -SN9C105 and SN9C120 bridges. -Similarly, only for the SN9C103, SN9C105 and SN9C120 controllers, blue and red -gain control files are available in the same directory, for which accepted -values may range from 0 to 127. - -There are other four entries in the directory above for each registered camera: -"reg", "val", "i2c_reg" and "i2c_val". The first two files control the -SN9C1xx bridge, while the other two control the sensor chip. "reg" and -"i2c_reg" hold the values of the current register index where the following -reading/writing operations are addressed at through "val" and "i2c_val". Their -use is not intended for end-users. Note that "i2c_reg" and "i2c_val" will not -be created if the sensor does not actually support the standard I2C protocol or -its registers are not 8-bit long. Also, remember that you must be logged in as -root before writing to them. - -As an example, suppose we were to want to read the value contained in the -register number 1 of the sensor register table - which is usually the product -identifier - of the camera registered as "/dev/video0": - - [root@localhost #] cd /sys/class/video4linux/video0 - [root@localhost #] echo 1 > i2c_reg - [root@localhost #] cat i2c_val - -Note that "cat" will fail if sensor registers cannot be read. - -Now let's set the green gain's register of the SN9C101 or SN9C102 chips to 2: - - [root@localhost #] echo 0x11 > reg - [root@localhost #] echo 2 > val - -Note that the SN9C1xx always returns 0 when some of its registers are read. -To avoid race conditions, all the I/O accesses to the above files are -serialized. -The sysfs interface also provides the "frame_header" entry, which exports the -frame header of the most recent requested and captured video frame. The header -is always 18-bytes long and is appended to every video frame by the SN9C1xx -controllers. As an example, this additional information can be used by the user -application for implementing auto-exposure features via software. - -The following table describes the frame header exported by the SN9C101 and -SN9C102: - -Byte # Value or bits Description ------- ------------- ----------- -0x00 0xFF Frame synchronisation pattern -0x01 0xFF Frame synchronisation pattern -0x02 0x00 Frame synchronisation pattern -0x03 0xC4 Frame synchronisation pattern -0x04 0xC4 Frame synchronisation pattern -0x05 0x96 Frame synchronisation pattern -0x06 [3:0] Read channel gain control = (1+R_GAIN/8) - [7:4] Blue channel gain control = (1+B_GAIN/8) -0x07 [ 0 ] Compression mode. 0=No compression, 1=Compression enabled - [2:1] Maximum scale factor for compression - [ 3 ] 1 = USB fifo(2K bytes) is full - [ 4 ] 1 = Digital gain is finish - [ 5 ] 1 = Exposure is finish - [7:6] Frame index -0x08 [7:0] Y sum inside Auto-Exposure area (low-byte) -0x09 [7:0] Y sum inside Auto-Exposure area (high-byte) - where Y sum = (R/4 + 5G/16 + B/8) / 32 -0x0A [7:0] Y sum outside Auto-Exposure area (low-byte) -0x0B [7:0] Y sum outside Auto-Exposure area (high-byte) - where Y sum = (R/4 + 5G/16 + B/8) / 128 -0x0C 0xXX Not used -0x0D 0xXX Not used -0x0E 0xXX Not used -0x0F 0xXX Not used -0x10 0xXX Not used -0x11 0xXX Not used - -The following table describes the frame header exported by the SN9C103: - -Byte # Value or bits Description ------- ------------- ----------- -0x00 0xFF Frame synchronisation pattern -0x01 0xFF Frame synchronisation pattern -0x02 0x00 Frame synchronisation pattern -0x03 0xC4 Frame synchronisation pattern -0x04 0xC4 Frame synchronisation pattern -0x05 0x96 Frame synchronisation pattern -0x06 [6:0] Read channel gain control = (1/2+R_GAIN/64) -0x07 [6:0] Blue channel gain control = (1/2+B_GAIN/64) - [7:4] -0x08 [ 0 ] Compression mode. 0=No compression, 1=Compression enabled - [2:1] Maximum scale factor for compression - [ 3 ] 1 = USB fifo(2K bytes) is full - [ 4 ] 1 = Digital gain is finish - [ 5 ] 1 = Exposure is finish - [7:6] Frame index -0x09 [7:0] Y sum inside Auto-Exposure area (low-byte) -0x0A [7:0] Y sum inside Auto-Exposure area (high-byte) - where Y sum = (R/4 + 5G/16 + B/8) / 32 -0x0B [7:0] Y sum outside Auto-Exposure area (low-byte) -0x0C [7:0] Y sum outside Auto-Exposure area (high-byte) - where Y sum = (R/4 + 5G/16 + B/8) / 128 -0x0D [1:0] Audio frame number - [ 2 ] 1 = Audio is recording -0x0E [7:0] Audio summation (low-byte) -0x0F [7:0] Audio summation (high-byte) -0x10 [7:0] Audio sample count -0x11 [7:0] Audio peak data in audio frame - -The AE area (sx, sy, ex, ey) in the active window can be set by programming the -registers 0x1c, 0x1d, 0x1e and 0x1f of the SN9C1xx controllers, where one unit -corresponds to 32 pixels. - -[1] The frame headers exported by the SN9C105 and SN9C120 are not described. - - -9. Supported devices -==================== -None of the names of the companies as well as their products will be mentioned -here. They have never collaborated with the author, so no advertising. - -From the point of view of a driver, what unambiguously identify a device are -its vendor and product USB identifiers. Below is a list of known identifiers of -devices assembling the SN9C1xx PC camera controllers: - -Vendor ID Product ID ---------- ---------- -0x0458 0x7025 -0x045e 0x00f5 -0x045e 0x00f7 -0x0471 0x0327 -0x0471 0x0328 -0x0c45 0x6001 -0x0c45 0x6005 -0x0c45 0x6007 -0x0c45 0x6009 -0x0c45 0x600d -0x0c45 0x6011 -0x0c45 0x6019 -0x0c45 0x6024 -0x0c45 0x6025 -0x0c45 0x6028 -0x0c45 0x6029 -0x0c45 0x602a -0x0c45 0x602b -0x0c45 0x602c -0x0c45 0x602d -0x0c45 0x602e -0x0c45 0x6030 -0x0c45 0x603f -0x0c45 0x6080 -0x0c45 0x6082 -0x0c45 0x6083 -0x0c45 0x6088 -0x0c45 0x608a -0x0c45 0x608b -0x0c45 0x608c -0x0c45 0x608e -0x0c45 0x608f -0x0c45 0x60a0 -0x0c45 0x60a2 -0x0c45 0x60a3 -0x0c45 0x60a8 -0x0c45 0x60aa -0x0c45 0x60ab -0x0c45 0x60ac -0x0c45 0x60ae -0x0c45 0x60af -0x0c45 0x60b0 -0x0c45 0x60b2 -0x0c45 0x60b3 -0x0c45 0x60b8 -0x0c45 0x60ba -0x0c45 0x60bb -0x0c45 0x60bc -0x0c45 0x60be -0x0c45 0x60c0 -0x0c45 0x60c2 -0x0c45 0x60c8 -0x0c45 0x60cc -0x0c45 0x60ea -0x0c45 0x60ec -0x0c45 0x60ef -0x0c45 0x60fa -0x0c45 0x60fb -0x0c45 0x60fc -0x0c45 0x60fe -0x0c45 0x6102 -0x0c45 0x6108 -0x0c45 0x610f -0x0c45 0x6130 -0x0c45 0x6138 -0x0c45 0x613a -0x0c45 0x613b -0x0c45 0x613c -0x0c45 0x613e - -The list above does not imply that all those devices work with this driver: up -until now only the ones that assemble the following pairs of SN9C1xx bridges -and image sensors are supported; kernel messages will always tell you whether -this is the case (see "Module loading" paragraph): - -Image sensor / SN9C1xx bridge | SN9C10[12] SN9C103 SN9C105 SN9C120 -------------------------------------------------------------------------------- -HV7131D Hynix Semiconductor | Yes No No No -HV7131R Hynix Semiconductor | No Yes Yes Yes -MI-0343 Micron Technology | Yes No No No -MI-0360 Micron Technology | No Yes Yes Yes -OV7630 OmniVision Technologies | Yes Yes Yes Yes -OV7660 OmniVision Technologies | No No Yes Yes -PAS106B PixArt Imaging | Yes No No No -PAS202B PixArt Imaging | Yes Yes No No -TAS5110C1B Taiwan Advanced Sensor | Yes No No No -TAS5110D Taiwan Advanced Sensor | Yes No No No -TAS5130D1B Taiwan Advanced Sensor | Yes No No No - -"Yes" means that the pair is supported by the driver, while "No" means that the -pair does not exist or is not supported by the driver. - -Only some of the available control settings of each image sensor are supported -through the V4L2 interface. - -Donations of new models for further testing and support would be much -appreciated. Non-available hardware will not be supported by the author of this -driver. - - -10. Notes for V4L2 application developers -========================================= -This driver follows the V4L2 API specifications. In particular, it enforces two -rules: - -- exactly one I/O method, either "mmap" or "read", is associated with each -file descriptor. Once it is selected, the application must close and reopen the -device to switch to the other I/O method; - -- although it is not mandatory, previously mapped buffer memory should always -be unmapped before calling any "VIDIOC_S_CROP" or "VIDIOC_S_FMT" ioctl's. -The same number of buffers as before will be allocated again to match the size -of the new video frames, so you have to map the buffers again before any I/O -attempts on them. - -Consistently with the hardware limits, this driver also supports image -downscaling with arbitrary scaling factors from 1, 2 and 4 in both directions. -However, the V4L2 API specifications don't correctly define how the scaling -factor can be chosen arbitrarily by the "negotiation" of the "source" and -"target" rectangles. To work around this flaw, we have added the convention -that, during the negotiation, whenever the "VIDIOC_S_CROP" ioctl is issued, the -scaling factor is restored to 1. - -This driver supports two different video formats: the first one is the "8-bit -Sequential Bayer" format and can be used to obtain uncompressed video data -from the device through the current I/O method, while the second one provides -either "raw" compressed video data (without frame headers not related to the -compressed data) or standard JPEG (with frame headers). The compression quality -may vary from 0 to 1 and can be selected or queried thanks to the -VIDIOC_S_JPEGCOMP and VIDIOC_G_JPEGCOMP V4L2 ioctl's. For maximum flexibility, -both the default active video format and the default compression quality -depend on how the image sensor being used is initialized. - - -11. Video frame formats [1] -======================= -The SN9C1xx PC Camera Controllers can send images in two possible video -formats over the USB: either native "Sequential RGB Bayer" or compressed. -The compression is used to achieve high frame rates. With regard to the -SN9C101, SN9C102 and SN9C103, the compression is based on the Huffman encoding -algorithm described below, while with regard to the SN9C105 and SN9C120 the -compression is based on the JPEG standard. -The current video format may be selected or queried from the user application -by calling the VIDIOC_S_FMT or VIDIOC_G_FMT ioctl's, as described in the V4L2 -API specifications. - -The name "Sequential Bayer" indicates the organization of the red, green and -blue pixels in one video frame. Each pixel is associated with a 8-bit long -value and is disposed in memory according to the pattern shown below: - -B[0] G[1] B[2] G[3] ... B[m-2] G[m-1] -G[m] R[m+1] G[m+2] R[m+2] ... G[2m-2] R[2m-1] -... -... B[(n-1)(m-2)] G[(n-1)(m-1)] -... G[n(m-2)] R[n(m-1)] - -The above matrix also represents the sequential or progressive read-out mode of -the (n, m) Bayer color filter array used in many CCD or CMOS image sensors. - -The Huffman compressed video frame consists of a bitstream that encodes for -every R, G, or B pixel the difference between the value of the pixel itself and -some reference pixel value. Pixels are organised in the Bayer pattern and the -Bayer sub-pixels are tracked individually and alternatingly. For example, in -the first line values for the B and G1 pixels are alternatingly encoded, while -in the second line values for the G2 and R pixels are alternatingly encoded. - -The pixel reference value is calculated as follows: -- the 4 top left pixels are encoded in raw uncompressed 8-bit format; -- the value in the top two rows is the value of the pixel left of the current - pixel; -- the value in the left column is the value of the pixel above the current - pixel; -- for all other pixels, the reference value is the average of the value of the - pixel on the left and the value of the pixel above the current pixel; -- there is one code in the bitstream that specifies the value of a pixel - directly (in 4-bit resolution); -- pixel values need to be clamped inside the range [0..255] for proper - decoding. - -The algorithm purely describes the conversion from compressed Bayer code used -in the SN9C101, SN9C102 and SN9C103 chips to uncompressed Bayer. Additional -steps are required to convert this to a color image (i.e. a color interpolation -algorithm). - -The following Huffman codes have been found: -0: +0 (relative to reference pixel value) -100: +4 -101: -4? -1110xxxx: set absolute value to xxxx.0000 -1101: +11 -1111: -11 -11001: +20 -110000: -20 -110001: ??? - these codes are apparently not used - -[1] The Huffman compression algorithm has been reverse-engineered and - documented by Bertrik Sikken. - - -12. Contact information -======================= -The author may be contacted by e-mail at <luca.risolia@studio.unibo.it>. - -GPG/PGP encrypted e-mail's are accepted. The GPG key ID of the author is -'FCE635A4'; the public 1024-bit key should be available at any keyserver; -the fingerprint is: '88E8 F32F 7244 68BA 3958 5D40 99DA 5D2A FCE6 35A4'. - - -13. Credits -=========== -Many thanks to following persons for their contribute (listed in alphabetical -order): - -- David Anderson for the donation of a webcam; -- Luca Capello for the donation of a webcam; -- Philippe Coval for having helped testing the PAS202BCA image sensor; -- Joao Rodrigo Fuzaro, Joao Limirio, Claudio Filho and Caio Begotti for the - donation of a webcam; -- Dennis Heitmann for the donation of a webcam; -- Jon Hollstrom for the donation of a webcam; -- Nick McGill for the donation of a webcam; -- Carlos Eduardo Medaglia Dyonisio, who added the support for the PAS202BCB - image sensor; -- Stefano Mozzi, who donated 45 EU; -- Andrew Pearce for the donation of a webcam; -- John Pullan for the donation of a webcam; -- Bertrik Sikken, who reverse-engineered and documented the Huffman compression - algorithm used in the SN9C101, SN9C102 and SN9C103 controllers and - implemented the first decoder; -- Ronny Standke for the donation of a webcam; -- Mizuno Takafumi for the donation of a webcam; -- an "anonymous" donator (who didn't want his name to be revealed) for the - donation of a webcam. -- an anonymous donator for the donation of four webcams and two boards with ten - image sensors. |
