Hi All,
This patch set contains two drivers
- R-Car Digital Radio Interface (DRIF) driver
- Maxim's MAX2175 RF to Bits tuner driver
These patches were based on top of media-next repo
commit: 778de01402328ca88cda84491d819bfc949935ff
These two drivers combined together expose a V4L2 SDR device that is compliant
with the V4L2 framework [1]. The RFC series of these two drivers were
published few weeks ago and the discussion thread is here [2]. Agreed review
comments are incorporated in this series.
Brief description of devices below
DRIF:
-----
This is a receive only slave controller that receives data into a FIFO from a
master device and uses DMA engine to move it from device to memory. It is a
serial I/O like controller with a design goal to act as digital radio receiver
targeting SDR solutions.
MAX2175:
--------
This is a RF front end tuner device that supports tuning to different bands &
frequency. It supports I2S output with programmable word lengths & single/dual
data lines usage based on selected receive mode. Each receive mode is
designated with a sample rate.
+---------------------+ +---------------------+
| |-----SCK------->| |
| MAX2175 (master) |-----SS-------->| DRIF (slave) |
| |-----SD0------->| |
| |-----SD1------->| |
+---------------------+ +---------------------+
New SDR formats:
----------------
The combined driver exposes new SDR formats. DRIF as such requires the receive
word length as the only programmable parameter in a normal case. Otherwise it is
agnostic of the tuner.
V4L2 framework requires publishing SDR formats about position of I & Q data
within the buffers. I have published three such formats to give an example. More
such formats are possible and will be added when needed.
References:
------------
[1] v4l2-compliance test report
root@salvator-x:~# v4l2-compliance -S /dev/swradio0
v4l2-compliance SHA : 788b674f3827607c09c31be11c91638f816aa6ae
Driver Info:
Driver name : rcar_drif
Card type : R-Car DRIF
Bus info : platform:R-Car DRIF
Driver version: 4.9.0
Capabilities : 0x85310000
SDR Capture
Tuner
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x05310000
SDR Capture
Tuner
Read/Write
Streaming
Extended Pix Format
Compliance test for device /dev/swradio0 (not using libv4l2):
Required ioctls:
test VIDIOC_QUERYCAP: OK
Allow for multiple opens:
test second sdr open: OK
test VIDIOC_QUERYCAP: OK
test VIDIOC_G/S_PRIORITY: OK
test for unlimited opens: OK
Debug ioctls:
test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
test VIDIOC_LOG_STATUS: OK
Input ioctls:
test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK
test VIDIOC_G/S_FREQUENCY: OK
test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
test VIDIOC_ENUMAUDIO: OK (Not Supported)
test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
test VIDIOC_G/S_AUDIO: OK (Not Supported)
Inputs: 0 Audio Inputs: 0 Tuners: 1
Output ioctls:
test VIDIOC_G/S_MODULATOR: OK (Not Supported)
test VIDIOC_G/S_FREQUENCY: OK
test VIDIOC_ENUMAUDOUT: OK (Not Supported)
test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
test VIDIOC_G/S_AUDOUT: OK (Not Supported)
Outputs: 0 Audio Outputs: 0 Modulators: 0
Input/Output configuration ioctls:
test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
test VIDIOC_G/S_EDID: OK (Not Supported)
Control ioctls:
test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
test VIDIOC_QUERYCTRL: OK
test VIDIOC_G/S_CTRL: OK
test VIDIOC_G/S/TRY_EXT_CTRLS: OK
test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
Standard Controls: 5 Private Controls: 4
Format ioctls:
test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
test VIDIOC_G/S_PARM: OK (Not Supported)
test VIDIOC_G_FBUF: OK (Not Supported)
test VIDIOC_G_FMT: OK
test VIDIOC_TRY_FMT: OK
test VIDIOC_S_FMT: OK
test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
test Cropping: OK (Not Supported)
test Composing: OK (Not Supported)
test Scaling: OK (Not Supported)
Codec ioctls:
test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
test VIDIOC_G_ENC_INDEX: OK (Not Supported)
test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)
Buffer ioctls:
test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
test VIDIOC_EXPBUF: OK (Not Supported)
Test input 0:
Total: 43, Succeeded: 43, Failed: 0, Warnings: 0
root@salvator-x:~#
[2] RFC patch set discussion thread
https://www.mail-archive.com/linux-renesas-soc@xxxxxxxxxxxxxxx/msg07968.html
Ramesh Shanmugasundaram (5):
media: v4l2-ctrls: Reserve controls for MAX217X
media: i2c: max2175: Add MAX2175 support
media: Add new SDR formats SC16, SC18 & SC20
doc_rst: media: New SDR formats SC16, SC18 & SC20
media: platform: rcar_drif: Add DRIF support
.../devicetree/bindings/media/i2c/max2175.txt | 61 +
.../devicetree/bindings/media/renesas,drif.txt | 136 ++
.../media/uapi/v4l/pixfmt-sdr-scu16be.rst | 80 +
.../media/uapi/v4l/pixfmt-sdr-scu18be.rst | 80 +
.../media/uapi/v4l/pixfmt-sdr-scu20be.rst | 80 +
Documentation/media/uapi/v4l/sdr-formats.rst | 3 +
drivers/media/i2c/Kconfig | 4 +
drivers/media/i2c/Makefile | 2 +
drivers/media/i2c/max2175/Kconfig | 8 +
drivers/media/i2c/max2175/Makefile | 4 +
drivers/media/i2c/max2175/max2175.c | 1558 +++++++++++++++++++
drivers/media/i2c/max2175/max2175.h | 108 ++
drivers/media/platform/Kconfig | 25 +
drivers/media/platform/Makefile | 1 +
drivers/media/platform/rcar_drif.c | 1574 ++++++++++++++++++++
drivers/media/v4l2-core/v4l2-ioctl.c | 3 +
include/uapi/linux/v4l2-controls.h | 5 +
include/uapi/linux/videodev2.h | 3 +
18 files changed, 3735 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/max2175.txt
create mode 100644 Documentation/devicetree/bindings/media/renesas,drif.txt
create mode 100644 Documentation/media/uapi/v4l/pixfmt-sdr-scu16be.rst
create mode 100644 Documentation/media/uapi/v4l/pixfmt-sdr-scu18be.rst
create mode 100644 Documentation/media/uapi/v4l/pixfmt-sdr-scu20be.rst
create mode 100644 drivers/media/i2c/max2175/Kconfig
create mode 100644 drivers/media/i2c/max2175/Makefile
create mode 100644 drivers/media/i2c/max2175/max2175.c
create mode 100644 drivers/media/i2c/max2175/max2175.h
create mode 100644 drivers/media/platform/rcar_drif.c
--
1.9.1
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