diff options
Diffstat (limited to 'Documentation/video4linux')
| -rw-r--r-- | Documentation/video4linux/CARDLIST.bttv | 2 | ||||
| -rw-r--r-- | Documentation/video4linux/CARDLIST.cx23885 | 5 | ||||
| -rw-r--r-- | Documentation/video4linux/CARDLIST.em28xx | 7 | ||||
| -rw-r--r-- | Documentation/video4linux/fimc.txt | 31 | ||||
| -rw-r--r-- | Documentation/video4linux/gspca.txt | 1 | ||||
| -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 | ||||
| -rw-r--r-- | Documentation/video4linux/v4l2-framework.txt | 5 | ||||
| -rw-r--r-- | Documentation/video4linux/v4l2-pci-skeleton.c | 929 |
10 files changed, 1009 insertions, 625 deletions
diff --git a/Documentation/video4linux/CARDLIST.bttv b/Documentation/video4linux/CARDLIST.bttv index f14475011fe..b092c0a14df 100644 --- a/Documentation/video4linux/CARDLIST.bttv +++ b/Documentation/video4linux/CARDLIST.bttv @@ -163,3 +163,5 @@ 162 -> Adlink MPG24 163 -> Bt848 Capture 14MHz 164 -> CyberVision CV06 (SV) +165 -> Kworld V-Stream Xpert TV PVR878 +166 -> PCI-8604PW diff --git a/Documentation/video4linux/CARDLIST.cx23885 b/Documentation/video4linux/CARDLIST.cx23885 index 9f056d512e3..fc009d0ee7d 100644 --- a/Documentation/video4linux/CARDLIST.cx23885 +++ b/Documentation/video4linux/CARDLIST.cx23885 @@ -31,10 +31,13 @@ 30 -> NetUP Dual DVB-T/C-CI RF [1b55:e2e4] 31 -> Leadtek Winfast PxDVR3200 H XC4000 [107d:6f39] 32 -> MPX-885 - 33 -> Mygica X8507 [14f1:8502] + 33 -> Mygica X8502/X8507 ISDB-T [14f1:8502] 34 -> TerraTec Cinergy T PCIe Dual [153b:117e] 35 -> TeVii S471 [d471:9022] 36 -> Hauppauge WinTV-HVR1255 [0070:2259] 37 -> Prof Revolution DVB-S2 8000 [8000:3034] 38 -> Hauppauge WinTV-HVR4400 [0070:c108,0070:c138,0070:c12a,0070:c1f8] 39 -> AVerTV Hybrid Express Slim HC81R [1461:d939] + 40 -> TurboSight TBS 6981 [6981:8888] + 41 -> TurboSight TBS 6980 [6980:8888] + 42 -> Leadtek Winfast PxPVR2200 [107d:6f21] diff --git a/Documentation/video4linux/CARDLIST.em28xx b/Documentation/video4linux/CARDLIST.em28xx index e8186440510..5a3ddcd340d 100644 --- a/Documentation/video4linux/CARDLIST.em28xx +++ b/Documentation/video4linux/CARDLIST.em28xx @@ -57,6 +57,7 @@ 56 -> Pinnacle Hybrid Pro (330e) (em2882) [2304:0226] 57 -> Kworld PlusTV HD Hybrid 330 (em2883) [eb1a:a316] 58 -> Compro VideoMate ForYou/Stereo (em2820/em2840) [185b:2041] + 59 -> Pinnacle PCTV HD Mini (em2874) [2304:023f] 60 -> Hauppauge WinTV HVR 850 (em2883) [2040:651f] 61 -> Pixelview PlayTV Box 4 USB 2.0 (em2820/em2840) 62 -> Gadmei TVR200 (em2820/em2840) @@ -86,3 +87,9 @@ 86 -> PCTV QuatroStick nano (520e) (em2884) [2013:0251] 87 -> Terratec Cinergy HTC USB XS (em2884) [0ccd:008e,0ccd:00ac] 88 -> C3 Tech Digital Duo HDTV/SDTV USB (em2884) [1b80:e755] + 89 -> Delock 61959 (em2874) [1b80:e1cc] + 90 -> KWorld USB ATSC TV Stick UB435-Q V2 (em2874) [1b80:e346] + 91 -> SpeedLink Vicious And Devine Laplace webcam (em2765) [1ae7:9003,1ae7:9004] + 92 -> PCTV DVB-S2 Stick (461e) (em28178) + 93 -> KWorld USB ATSC TV Stick UB435-Q V3 (em2874) [1b80:e34c] + 94 -> PCTV tripleStick (292e) (em28178) diff --git a/Documentation/video4linux/fimc.txt b/Documentation/video4linux/fimc.txt index e51f1b5b732..e0c6b8bc474 100644 --- a/Documentation/video4linux/fimc.txt +++ b/Documentation/video4linux/fimc.txt @@ -140,40 +140,9 @@ You can either grep through the kernel log to find relevant information, i.e. or retrieve the information from /dev/media? with help of the media-ctl tool: # media-ctl -p -6. Platform support -=================== - -The machine code (arch/arm/plat-samsung and arch/arm/mach-*) must select -following options: - -CONFIG_S5P_DEV_FIMC0 mandatory -CONFIG_S5P_DEV_FIMC1 \ -CONFIG_S5P_DEV_FIMC2 | optional -CONFIG_S5P_DEV_FIMC3 | -CONFIG_S5P_SETUP_FIMC / -CONFIG_S5P_SETUP_MIPIPHY \ -CONFIG_S5P_DEV_CSIS0 | optional for MIPI-CSI interface -CONFIG_S5P_DEV_CSIS1 / - -Except that, relevant s5p_device_fimc? should be registered in the machine code -in addition to a "s5p-fimc-md" platform device to which the media device driver -is bound. The "s5p-fimc-md" device instance is required even if only mem-to-mem -operation is used. - -The description of sensor(s) attached to FIMC/MIPI-CSIS camera inputs should be -passed as the "s5p-fimc-md" device platform_data. The platform data structure -is defined in file include/media/s5p_fimc.h. - 7. Build ======== -This driver depends on following config options: -PLAT_S5P, -PM_RUNTIME, -I2C, -REGULATOR, -VIDEO_V4L2_SUBDEV_API, - If the driver is built as a loadable kernel module (CONFIG_VIDEO_SAMSUNG_S5P_FIMC=m) two modules are created (in addition to the core v4l2 modules): s5p-fimc.ko and optional s5p-csis.ko (MIPI-CSI receiver subdev). diff --git a/Documentation/video4linux/gspca.txt b/Documentation/video4linux/gspca.txt index 1e6b6531bbc..d2ba80bb7af 100644 --- a/Documentation/video4linux/gspca.txt +++ b/Documentation/video4linux/gspca.txt @@ -55,6 +55,7 @@ zc3xx 0458:700f Genius VideoCam Web V2 sonixj 0458:7025 Genius Eye 311Q sn9c20x 0458:7029 Genius Look 320s sonixj 0458:702e Genius Slim 310 NB +sn9c20x 0458:7045 Genius Look 1320 V2 sn9c20x 0458:704a Genius Slim 1320 sn9c20x 0458:704c Genius i-Look 1321 sn9c20x 045e:00f4 LifeCam VX-6000 (SN9C20x + OV9650) diff --git a/Documentation/video4linux/omap4_camera.txt b/Documentation/video4linux/omap4_camera.txt new file mode 100644 index 00000000000..25d9b40a465 --- /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 2f9b4875ab8..616607955aa 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 b4f67040403..00000000000 --- 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. diff --git a/Documentation/video4linux/v4l2-framework.txt b/Documentation/video4linux/v4l2-framework.txt index 6c4866b49eb..667a4336170 100644 --- a/Documentation/video4linux/v4l2-framework.txt +++ b/Documentation/video4linux/v4l2-framework.txt @@ -34,6 +34,10 @@ So this framework sets up the basic building blocks that all drivers need and this same framework should make it much easier to refactor common code into utility functions shared by all drivers. +A good example to look at as a reference is the v4l2-pci-skeleton.c +source that is available in this directory. It is a skeleton driver for +a PCI capture card, and demonstrates how to use the V4L2 driver +framework. It can be used as a template for real PCI video capture driver. Structure of a driver --------------------- @@ -768,6 +772,7 @@ types exist: VFL_TYPE_GRABBER: videoX for video input/output devices VFL_TYPE_VBI: vbiX for vertical blank data (i.e. closed captions, teletext) VFL_TYPE_RADIO: radioX for radio tuners +VFL_TYPE_SDR: swradioX for Software Defined Radio tuners The last argument gives you a certain amount of control over the device device node number used (i.e. the X in videoX). Normally you will pass -1 diff --git a/Documentation/video4linux/v4l2-pci-skeleton.c b/Documentation/video4linux/v4l2-pci-skeleton.c new file mode 100644 index 00000000000..46904fe4960 --- /dev/null +++ b/Documentation/video4linux/v4l2-pci-skeleton.c @@ -0,0 +1,929 @@ +/* + * This is a V4L2 PCI Skeleton Driver. It gives an initial skeleton source + * for use with other PCI drivers. + * + * This skeleton PCI driver assumes that the card has an S-Video connector as + * input 0 and an HDMI connector as input 1. + * + * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved. + * + * This program is free software; you may redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kmod.h> +#include <linux/mutex.h> +#include <linux/pci.h> +#include <linux/interrupt.h> +#include <linux/videodev2.h> +#include <linux/v4l2-dv-timings.h> +#include <media/v4l2-device.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-dv-timings.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-event.h> +#include <media/videobuf2-dma-contig.h> + +MODULE_DESCRIPTION("V4L2 PCI Skeleton Driver"); +MODULE_AUTHOR("Hans Verkuil"); +MODULE_LICENSE("GPL v2"); +MODULE_DEVICE_TABLE(pci, skeleton_pci_tbl); + +/** + * struct skeleton - All internal data for one instance of device + * @pdev: PCI device + * @v4l2_dev: top-level v4l2 device struct + * @vdev: video node structure + * @ctrl_handler: control handler structure + * @lock: ioctl serialization mutex + * @std: current SDTV standard + * @timings: current HDTV timings + * @format: current pix format + * @input: current video input (0 = SDTV, 1 = HDTV) + * @queue: vb2 video capture queue + * @alloc_ctx: vb2 contiguous DMA context + * @qlock: spinlock controlling access to buf_list and sequence + * @buf_list: list of buffers queued for DMA + * @sequence: frame sequence counter + */ +struct skeleton { + struct pci_dev *pdev; + struct v4l2_device v4l2_dev; + struct video_device vdev; + struct v4l2_ctrl_handler ctrl_handler; + struct mutex lock; + v4l2_std_id std; + struct v4l2_dv_timings timings; + struct v4l2_pix_format format; + unsigned input; + + struct vb2_queue queue; + struct vb2_alloc_ctx *alloc_ctx; + + spinlock_t qlock; + struct list_head buf_list; + unsigned field; + unsigned sequence; +}; + +struct skel_buffer { + struct vb2_buffer vb; + struct list_head list; +}; + +static inline struct skel_buffer *to_skel_buffer(struct vb2_buffer *vb2) +{ + return container_of(vb2, struct skel_buffer, vb); +} + +static const struct pci_device_id skeleton_pci_tbl[] = { + /* { PCI_DEVICE(PCI_VENDOR_ID_, PCI_DEVICE_ID_) }, */ + { 0, } +}; + +/* + * HDTV: this structure has the capabilities of the HDTV receiver. + * It is used to constrain the huge list of possible formats based + * upon the hardware capabilities. + */ +static const struct v4l2_dv_timings_cap skel_timings_cap = { + .type = V4L2_DV_BT_656_1120, + /* keep this initialization for compatibility with GCC < 4.4.6 */ + .reserved = { 0 }, + V4L2_INIT_BT_TIMINGS( + 720, 1920, /* min/max width */ + 480, 1080, /* min/max height */ + 27000000, 74250000, /* min/max pixelclock*/ + V4L2_DV_BT_STD_CEA861, /* Supported standards */ + /* capabilities */ + V4L2_DV_BT_CAP_INTERLACED | V4L2_DV_BT_CAP_PROGRESSIVE + ) +}; + +/* + * Supported SDTV standards. This does the same job as skel_timings_cap, but + * for standard TV formats. + */ +#define SKEL_TVNORMS V4L2_STD_ALL + +/* + * Interrupt handler: typically interrupts happen after a new frame has been + * captured. It is the job of the handler to remove the new frame from the + * internal list and give it back to the vb2 framework, updating the sequence + * counter, field and timestamp at the same time. + */ +static irqreturn_t skeleton_irq(int irq, void *dev_id) +{ +#ifdef TODO + struct skeleton *skel = dev_id; + + /* handle interrupt */ + + /* Once a new frame has been captured, mark it as done like this: */ + if (captured_new_frame) { + ... + spin_lock(&skel->qlock); + list_del(&new_buf->list); + spin_unlock(&skel->qlock); + v4l2_get_timestamp(&new_buf->vb.v4l2_buf.timestamp); + new_buf->vb.v4l2_buf.sequence = skel->sequence++; + new_buf->vb.v4l2_buf.field = skel->field; + if (skel->format.field == V4L2_FIELD_ALTERNATE) { + if (skel->field == V4L2_FIELD_BOTTOM) + skel->field = V4L2_FIELD_TOP; + else if (skel->field == V4L2_FIELD_TOP) + skel->field = V4L2_FIELD_BOTTOM; + } + vb2_buffer_done(&new_buf->vb, VB2_BUF_STATE_DONE); + } +#endif + return IRQ_HANDLED; +} + +/* + * Setup the constraints of the queue: besides setting the number of planes + * per buffer and the size and allocation context of each plane, it also + * checks if sufficient buffers have been allocated. Usually 3 is a good + * minimum number: many DMA engines need a minimum of 2 buffers in the + * queue and you need to have another available for userspace processing. + */ +static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct skeleton *skel = vb2_get_drv_priv(vq); + + skel->field = skel->format.field; + if (skel->field == V4L2_FIELD_ALTERNATE) { + /* + * You cannot use read() with FIELD_ALTERNATE since the field + * information (TOP/BOTTOM) cannot be passed back to the user. + */ + if (vb2_fileio_is_active(vq)) + return -EINVAL; + skel->field = V4L2_FIELD_TOP; + } + + if (vq->num_buffers + *nbuffers < 3) + *nbuffers = 3 - vq->num_buffers; + + if (fmt && fmt->fmt.pix.sizeimage < skel->format.sizeimage) + return -EINVAL; + *nplanes = 1; + sizes[0] = fmt ? fmt->fmt.pix.sizeimage : skel->format.sizeimage; + alloc_ctxs[0] = skel->alloc_ctx; + return 0; +} + +/* + * Prepare the buffer for queueing to the DMA engine: check and set the + * payload size. + */ +static int buffer_prepare(struct vb2_buffer *vb) +{ + struct skeleton *skel = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = skel->format.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + dev_err(&skel->pdev->dev, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + return 0; +} + +/* + * Queue this buffer to the DMA engine. + */ +static void buffer_queue(struct vb2_buffer *vb) +{ + struct skeleton *skel = vb2_get_drv_priv(vb->vb2_queue); + struct skel_buffer *buf = to_skel_buffer(vb); + unsigned long flags; + + spin_lock_irqsave(&skel->qlock, flags); + list_add_tail(&buf->list, &skel->buf_list); + + /* TODO: Update any DMA pointers if necessary */ + + spin_unlock_irqrestore(&skel->qlock, flags); +} + +static void return_all_buffers(struct skeleton *skel, + enum vb2_buffer_state state) +{ + struct skel_buffer *buf, *node; + unsigned long flags; + + spin_lock_irqsave(&skel->qlock, flags); + list_for_each_entry_safe(buf, node, &skel->buf_list, list) { + vb2_buffer_done(&buf->vb, state); + list_del(&buf->list); + } + spin_unlock_irqrestore(&skel->qlock, flags); +} + +/* + * Start streaming. First check if the minimum number of buffers have been + * queued. If not, then return -ENOBUFS and the vb2 framework will call + * this function again the next time a buffer has been queued until enough + * buffers are available to actually start the DMA engine. + */ +static int start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct skeleton *skel = vb2_get_drv_priv(vq); + int ret = 0; + + skel->sequence = 0; + + /* TODO: start DMA */ + + if (ret) { + /* + * In case of an error, return all active buffers to the + * QUEUED state + */ + return_all_buffers(skel, VB2_BUF_STATE_QUEUED); + } + return ret; +} + +/* + * Stop the DMA engine. Any remaining buffers in the DMA queue are dequeued + * and passed on to the vb2 framework marked as STATE_ERROR. + */ +static void stop_streaming(struct vb2_queue *vq) +{ + struct skeleton *skel = vb2_get_drv_priv(vq); + + /* TODO: stop DMA */ + + /* Release all active buffers */ + return_all_buffers(skel, VB2_BUF_STATE_ERROR); +} + +/* + * The vb2 queue ops. Note that since q->lock is set we can use the standard + * vb2_ops_wait_prepare/finish helper functions. If q->lock would be NULL, + * then this driver would have to provide these ops. + */ +static struct vb2_ops skel_qops = { + .queue_setup = queue_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .start_streaming = start_streaming, + .stop_streaming = stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +/* + * Required ioctl querycap. Note that the version field is prefilled with + * the version of the kernel. + */ +static int skeleton_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct skeleton *skel = video_drvdata(file); + + strlcpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver)); + strlcpy(cap->card, "V4L2 PCI Skeleton", sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s", + pci_name(skel->pdev)); + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + return 0; +} + +/* + * Helper function to check and correct struct v4l2_pix_format. It's used + * not only in VIDIOC_TRY/S_FMT, but also elsewhere if changes to the SDTV + * standard, HDTV timings or the video input would require updating the + * current format. + */ +static void skeleton_fill_pix_format(struct skeleton *skel, + struct v4l2_pix_format *pix) +{ + pix->pixelformat = V4L2_PIX_FMT_YUYV; + if (skel->input == 0) { + /* S-Video input */ + pix->width = 720; + pix->height = (skel->std & V4L2_STD_525_60) ? 480 : 576; + pix->field = V4L2_FIELD_INTERLACED; + pix->colorspace = V4L2_COLORSPACE_SMPTE170M; + } else { + /* HDMI input */ + pix->width = skel->timings.bt.width; + pix->height = skel->timings.bt.height; + if (skel->timings.bt.interlaced) { + pix->field = V4L2_FIELD_ALTERNATE; + pix->height /= 2; + } else { + pix->field = V4L2_FIELD_NONE; + } + pix->colorspace = V4L2_COLORSPACE_REC709; + } + + /* + * The YUYV format is four bytes for every two pixels, so bytesperline + * is width * 2. + */ + pix->bytesperline = pix->width * 2; + pix->sizeimage = pix->bytesperline * pix->height; + pix->priv = 0; +} + +static int skeleton_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct skeleton *skel = video_drvdata(file); + struct v4l2_pix_format *pix = &f->fmt.pix; + + /* + * Due to historical reasons providing try_fmt with an unsupported + * pixelformat will return -EINVAL for video receivers. Webcam drivers, + * however, will silently correct the pixelformat. Some video capture + * applications rely on this behavior... + */ + if (pix->pixelformat != V4L2_PIX_FMT_YUYV) + return -EINVAL; + skeleton_fill_pix_format(skel, pix); + return 0; +} + +static int skeleton_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct skeleton *skel = video_drvdata(file); + int ret; + + ret = skeleton_try_fmt_vid_cap(file, priv, f); + if (ret) + return ret; + + /* + * It is not allowed to change the format while buffers for use with + * streaming have already been allocated. + */ + if (vb2_is_busy(&skel->queue)) + return -EBUSY; + + /* TODO: change format */ + skel->format = f->fmt.pix; + return 0; +} + +static int skeleton_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct skeleton *skel = video_drvdata(file); + + f->fmt.pix = skel->format; + return 0; +} + +static int skeleton_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + if (f->index != 0) + return -EINVAL; + + strlcpy(f->description, "4:2:2, packed, YUYV", sizeof(f->description)); + f->pixelformat = V4L2_PIX_FMT_YUYV; + f->flags = 0; + return 0; +} + +static int skeleton_s_std(struct file *file, void *priv, v4l2_std_id std) +{ + struct skeleton *skel = video_drvdata(file); + + /* S_STD is not supported on the HDMI input */ + if (skel->input) + return -ENODATA; + + /* + * No change, so just return. Some applications call S_STD again after + * the buffers for streaming have been set up, so we have to allow for + * this behavior. + */ + if (std == skel->std) + return 0; + + /* + * Changing the standard implies a format change, which is not allowed + * while buffers for use with streaming have already been allocated. + */ + if (vb2_is_busy(&skel->queue)) + return -EBUSY; + + /* TODO: handle changing std */ + + skel->std = std; + + /* Update the internal format */ + skeleton_fill_pix_format(skel, &skel->format); + return 0; +} + +static int skeleton_g_std(struct file *file, void *priv, v4l2_std_id *std) +{ + struct skeleton *skel = video_drvdata(file); + + /* G_STD is not supported on the HDMI input */ + if (skel->input) + return -ENODATA; + + *std = skel->std; + return 0; +} + +/* + * Query the current standard as seen by the hardware. This function shall + * never actually change the standard, it just detects and reports. + * The framework will initially set *std to tvnorms (i.e. the set of + * supported standards by this input), and this function should just AND + * this value. If there is no signal, then *std should be set to 0. + */ +static int skeleton_querystd(struct file *file, void *priv, v4l2_std_id *std) +{ + struct skeleton *skel = video_drvdata(file); + + /* QUERY_STD is not supported on the HDMI input */ + if (skel->input) + return -ENODATA; + +#ifdef TODO + /* + * Query currently seen standard. Initial value of *std is + * V4L2_STD_ALL. This function should look something like this: + */ + get_signal_info(); + if (no_signal) { + *std = 0; + return 0; + } + /* Use signal information to reduce the number of possible standards */ + if (signal_has_525_lines) + *std &= V4L2_STD_525_60; + else + *std &= V4L2_STD_625_50; +#endif + return 0; +} + +static int skeleton_s_dv_timings(struct file *file, void *_fh, + struct v4l2_dv_timings *timings) +{ + struct skeleton *skel = video_drvdata(file); + + /* S_DV_TIMINGS is not supported on the S-Video input */ + if (skel->input == 0) + return -ENODATA; + + /* Quick sanity check */ + if (!v4l2_valid_dv_timings(timings, &skel_timings_cap, NULL, NULL)) + return -EINVAL; + + /* Check if the timings are part of the CEA-861 timings. */ + if (!v4l2_find_dv_timings_cap(timings, &skel_timings_cap, + 0, NULL, NULL)) + return -EINVAL; + + /* Return 0 if the new timings are the same as the current timings. */ + if (v4l2_match_dv_timings(timings, &skel->timings, 0)) + return 0; + + /* + * Changing the timings implies a format change, which is not allowed + * while buffers for use with streaming have already been allocated. + */ + if (vb2_is_busy(&skel->queue)) + return -EBUSY; + + /* TODO: Configure new timings */ + + /* Save timings */ + skel->timings = *timings; + + /* Update the internal format */ + skeleton_fill_pix_format(skel, &skel->format); + return 0; +} + +static int skeleton_g_dv_timings(struct file *file, void *_fh, + struct v4l2_dv_timings *timings) +{ + struct skeleton *skel = video_drvdata(file); + + /* G_DV_TIMINGS is not supported on the S-Video input */ + if (skel->input == 0) + return -ENODATA; + + *timings = skel->timings; + return 0; +} + +static int skeleton_enum_dv_timings(struct file *file, void *_fh, + struct v4l2_enum_dv_timings *timings) +{ + struct skeleton *skel = video_drvdata(file); + + /* ENUM_DV_TIMINGS is not supported on the S-Video input */ + if (skel->input == 0) + return -ENODATA; + + return v4l2_enum_dv_timings_cap(timings, &skel_timings_cap, + NULL, NULL); +} + +/* + * Query the current timings as seen by the hardware. This function shall + * never actually change the timings, it just detects and reports. + * If no signal is detected, then return -ENOLINK. If the hardware cannot + * lock to the signal, then return -ENOLCK. If the signal is out of range + * of the capabilities of the system (e.g., it is possible that the receiver + * can lock but that the DMA engine it is connected to cannot handle + * pixelclocks above a certain frequency), then -ERANGE is returned. + */ +static int skeleton_query_dv_timings(struct file *file, void *_fh, + struct v4l2_dv_timings *timings) +{ + struct skeleton *skel = video_drvdata(file); + + /* QUERY_DV_TIMINGS is not supported on the S-Video input */ + if (skel->input == 0) + return -ENODATA; + +#ifdef TODO + /* + * Query currently seen timings. This function should look + * something like this: + */ + detect_timings(); + if (no_signal) + return -ENOLINK; + if (cannot_lock_to_signal) + return -ENOLCK; + if (signal_out_of_range_of_capabilities) + return -ERANGE; + + /* Useful for debugging */ + v4l2_print_dv_timings(skel->v4l2_dev.name, "query_dv_timings:", + timings, true); +#endif + return 0; +} + +static int skeleton_dv_timings_cap(struct file *file, void *fh, + struct v4l2_dv_timings_cap *cap) +{ + struct skeleton *skel = video_drvdata(file); + + /* DV_TIMINGS_CAP is not supported on the S-Video input */ + if (skel->input == 0) + return -ENODATA; + *cap = skel_timings_cap; + return 0; +} + +static int skeleton_enum_input(struct file *file, void *priv, + struct v4l2_input *i) +{ + if (i->index > 1) + return -EINVAL; + + i->type = V4L2_INPUT_TYPE_CAMERA; + if (i->index == 0) { + i->std = SKEL_TVNORMS; + strlcpy(i->name, "S-Video", sizeof(i->name)); + i->capabilities = V4L2_IN_CAP_STD; + } else { + i->std = 0; + strlcpy(i->name, "HDMI", sizeof(i->name)); + i->capabilities = V4L2_IN_CAP_DV_TIMINGS; + } + return 0; +} + +static int skeleton_s_input(struct file *file, void *priv, unsigned int i) +{ + struct skeleton *skel = video_drvdata(file); + + if (i > 1) + return -EINVAL; + + /* + * Changing the input implies a format change, which is not allowed + * while buffers for use with streaming have already been allocated. + */ + if (vb2_is_busy(&skel->queue)) + return -EBUSY; + + skel->input = i; + /* + * Update tvnorms. The tvnorms value is used by the core to implement + * VIDIOC_ENUMSTD so it has to be correct. If tvnorms == 0, then + * ENUMSTD will return -ENODATA. + */ + skel->vdev.tvnorms = i ? 0 : SKEL_TVNORMS; + + /* Update the internal format */ + skeleton_fill_pix_format(skel, &skel->format); + return 0; +} + +static int skeleton_g_input(struct file *file, void *priv, unsigned int *i) +{ + struct skeleton *skel = video_drvdata(file); + + *i = skel->input; + return 0; +} + +/* The control handler. */ +static int skeleton_s_ctrl(struct v4l2_ctrl *ctrl) +{ + /*struct skeleton *skel = + container_of(ctrl->handler, struct skeleton, ctrl_handler);*/ + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + /* TODO: set brightness to ctrl->val */ + break; + case V4L2_CID_CONTRAST: + /* TODO: set contrast to ctrl->val */ + break; + case V4L2_CID_SATURATION: + /* TODO: set saturation to ctrl->val */ + break; + case V4L2_CID_HUE: + /* TODO: set hue to ctrl->val */ + break; + default: + return -EINVAL; + } + return 0; +} + +/* ------------------------------------------------------------------ + File operations for the device + ------------------------------------------------------------------*/ + +static const struct v4l2_ctrl_ops skel_ctrl_ops = { + .s_ctrl = skeleton_s_ctrl, +}; + +/* + * The set of all supported ioctls. Note that all the streaming ioctls + * use the vb2 helper functions that take care of all the locking and + * that also do ownership tracking (i.e. only the filehandle that requested + * the buffers can call the streaming ioctls, all other filehandles will + * receive -EBUSY if they attempt to call the same streaming ioctls). + * + * The last three ioctls also use standard helper functions: these implement + * standard behavior for drivers with controls. + */ +static const struct v4l2_ioctl_ops skel_ioctl_ops = { + .vidioc_querycap = skeleton_querycap, + .vidioc_try_fmt_vid_cap = skeleton_try_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = skeleton_s_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = skeleton_g_fmt_vid_cap, + .vidioc_enum_fmt_vid_cap = skeleton_enum_fmt_vid_cap, + + .vidioc_g_std = skeleton_g_std, + .vidioc_s_std = skeleton_s_std, + .vidioc_querystd = skeleton_querystd, + + .vidioc_s_dv_timings = skeleton_s_dv_timings, + .vidioc_g_dv_timings = skeleton_g_dv_timings, + .vidioc_enum_dv_timings = skeleton_enum_dv_timings, + .vidioc_query_dv_timings = skeleton_query_dv_timings, + .vidioc_dv_timings_cap = skeleton_dv_timings_cap, + + .vidioc_enum_input = skeleton_enum_input, + .vidioc_g_input = skeleton_g_input, + .vidioc_s_input = skeleton_s_input, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/* + * The set of file operations. Note that all these ops are standard core + * helper functions. + */ +static const struct v4l2_file_operations skel_fops = { + .owner = THIS_MODULE, + .open = v4l2_fh_open, + .release = vb2_fop_release, + .unlocked_ioctl = video_ioctl2, + .read = vb2_fop_read, + .mmap = vb2_fop_mmap, + .poll = vb2_fop_poll, +}; + +/* + * The initial setup of this device instance. Note that the initial state of + * the driver should be complete. So the initial format, standard, timings + * and video input should all be initialized to some reasonable value. + */ +static int skeleton_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + /* The initial timings are chosen to be 720p60. */ + static const struct v4l2_dv_timings timings_def = + V4L2_DV_BT_CEA_1280X720P60; + struct skeleton *skel; + struct video_device *vdev; + struct v4l2_ctrl_handler *hdl; + struct vb2_queue *q; + int ret; + + /* Enable PCI */ + ret = pci_enable_device(pdev); + if (ret) + return ret; + ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (ret) { + dev_err(&pdev->dev, "no suitable DMA available.\n"); + goto disable_pci; + } + + /* Allocate a new instance */ + skel = devm_kzalloc(&pdev->dev, sizeof(struct skeleton), GFP_KERNEL); + if (!skel) + return -ENOMEM; + + /* Allocate the interrupt */ + ret = devm_request_irq(&pdev->dev, pdev->irq, + skeleton_irq, 0, KBUILD_MODNAME, skel); + if (ret) { + dev_err(&pdev->dev, "request_irq failed\n"); + goto disable_pci; + } + skel->pdev = pdev; + + /* Fill in the initial format-related settings */ + skel->timings = timings_def; + skel->std = V4L2_STD_625_50; + skeleton_fill_pix_format(skel, &skel->format); + + /* Initialize the top-level structure */ + ret = v4l2_device_register(&pdev->dev, &skel->v4l2_dev); + if (ret) + goto disable_pci; + + mutex_init(&skel->lock); + + /* Add the controls */ + hdl = &skel->ctrl_handler; + v4l2_ctrl_handler_init(hdl, 4); + v4l2_ctrl_new_std(hdl, &skel_ctrl_ops, + V4L2_CID_BRIGHTNESS, 0, 255, 1, 127); + v4l2_ctrl_new_std(hdl, &skel_ctrl_ops, + V4L2_CID_CONTRAST, 0, 255, 1, 16); + v4l2_ctrl_new_std(hdl, &skel_ctrl_ops, + V4L2_CID_SATURATION, 0, 255, 1, 127); + v4l2_ctrl_new_std(hdl, &skel_ctrl_ops, + V4L2_CID_HUE, -128, 127, 1, 0); + if (hdl->error) { + ret = hdl->error; + goto free_hdl; + } + skel->v4l2_dev.ctrl_handler = hdl; + + /* Initialize the vb2 queue */ + q = &skel->queue; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ; + q->drv_priv = skel; + q->buf_struct_size = sizeof(struct skel_buffer); + q->ops = &skel_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + /* + * Assume that this DMA engine needs to have at least two buffers + * available before it can be started. The start_streaming() op + * won't be called until at least this many buffers are queued up. + */ + q->min_buffers_needed = 2; + /* + * The serialization lock for the streaming ioctls. This is the same + * as the main serialization lock, but if some of the non-streaming + * ioctls could take a long time to execute, then you might want to + * have a different lock here to prevent VIDIOC_DQBUF from being + * blocked while waiting for another action to finish. This is + * generally not needed for PCI devices, but USB devices usually do + * want a separate lock here. + */ + q->lock = &skel->lock; + /* + * Since this driver can only do 32-bit DMA we must make sure that + * the vb2 core will allocate the buffers in 32-bit DMA memory. + */ + q->gfp_flags = GFP_DMA32; + ret = vb2_queue_init(q); + if (ret) + goto free_hdl; + + skel->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); + if (IS_ERR(skel->alloc_ctx)) { + dev_err(&pdev->dev, "Can't allocate buffer context"); + ret = PTR_ERR(skel->alloc_ctx); + goto free_hdl; + } + INIT_LIST_HEAD(&skel->buf_list); + spin_lock_init(&skel->qlock); + + /* Initialize the video_device structure */ + vdev = &skel->vdev; + strlcpy(vdev->name, KBUILD_MODNAME, sizeof(vdev->name)); + /* + * There is nothing to clean up, so release is set to an empty release + * function. The release callback must be non-NULL. + */ + vdev->release = video_device_release_empty; + vdev->fops = &skel_fops, + vdev->ioctl_ops = &skel_ioctl_ops, + /* + * The main serialization lock. All ioctls are serialized by this + * lock. Exception: if q->lock is set, then the streaming ioctls + * are serialized by that separate lock. + */ + vdev->lock = &skel->lock; + vdev->queue = q; + vdev->v4l2_dev = &skel->v4l2_dev; + /* Supported SDTV standards, if any */ + vdev->tvnorms = SKEL_TVNORMS; + /* If this bit is set, then the v4l2 core will provide the support + * for the VIDIOC_G/S_PRIORITY ioctls. This flag will eventually + * go away once all drivers have been converted to use struct v4l2_fh. + */ + set_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags); + video_set_drvdata(vdev, skel); + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret) + goto free_ctx; + + dev_info(&pdev->dev, "V4L2 PCI Skeleton Driver loaded\n"); + return 0; + +free_ctx: + vb2_dma_contig_cleanup_ctx(skel->alloc_ctx); +free_hdl: + v4l2_ctrl_handler_free(&skel->ctrl_handler); + v4l2_device_unregister(&skel->v4l2_dev); +disable_pci: + pci_disable_device(pdev); + return ret; +} + +static void skeleton_remove(struct pci_dev *pdev) +{ + struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev); + struct skeleton *skel = container_of(v4l2_dev, struct skeleton, v4l2_dev); + + video_unregister_device(&skel->vdev); + v4l2_ctrl_handler_free(&skel->ctrl_handler); + vb2_dma_contig_cleanup_ctx(skel->alloc_ctx); + v4l2_device_unregister(&skel->v4l2_dev); + pci_disable_device(skel->pdev); +} + +static struct pci_driver skeleton_driver = { + .name = KBUILD_MODNAME, + .probe = skeleton_probe, + .remove = skeleton_remove, + .id_table = skeleton_pci_tbl, +}; + +module_pci_driver(skeleton_driver); |