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[media] rtl2832_sdr: Realtek RTL2832 SDR driver module

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Implement SDR driver for Realtek RTL2832U chip as a DVB extension
module. SDR module is attached by DVB USB RTL28XXU driver as a DVB
SEC (satellite equipment controller) module. Abusing unused SEC here
has no harm as that is DVB-T only frontend.

SDR functionality is provided by RTL2832 DVB-T demodulator. I suspect
it is originally planned for DAB and FM, but it could be abused general
SDR, due to modern silicon tuners that has wide frequency range and a
lot of configurable parameters (filters, gains, ...).

http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/44461

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Antti Palosaari 2013-09-10 00:07:56 -03:00 committed by Mauro Carvalho Chehab
parent ecfb7ca3c8
commit 771138920e
6 changed files with 1542 additions and 0 deletions
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2
drivers/staging/media/Kconfig
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@ -41,6 +41,8 @@ source "drivers/staging/media/solo6x10/Kconfig"
source "drivers/staging/media/omap4iss/Kconfig"
source "drivers/staging/media/rtl2832u_sdr/Kconfig"
# Keep LIRC at the end, as it has sub-menus
source "drivers/staging/media/lirc/Kconfig"

2
drivers/staging/media/Makefile
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@ -11,3 +11,5 @@ obj-$(CONFIG_VIDEO_OMAP4) += omap4iss/
obj-$(CONFIG_USB_SN9C102) += sn9c102/
obj-$(CONFIG_VIDEO_OMAP2) += omap24xx/
obj-$(CONFIG_VIDEO_TCM825X) += omap24xx/
obj-$(CONFIG_DVB_RTL2832_SDR) += rtl2832u_sdr/

7
drivers/staging/media/rtl2832u_sdr/Kconfig Normal file
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@ -0,0 +1,7 @@
config DVB_RTL2832_SDR
tristate "Realtek RTL2832 SDR"
depends on USB && DVB_CORE && I2C && VIDEO_V4L2 && DVB_USB_RTL28XXU
select DVB_RTL2832
select VIDEOBUF2_VMALLOC
default m if !MEDIA_SUBDRV_AUTOSELECT

6
drivers/staging/media/rtl2832u_sdr/Makefile Normal file
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@ -0,0 +1,6 @@
obj-$(CONFIG_DVB_RTL2832_SDR) += rtl2832_sdr.o
ccflags-y += -Idrivers/media/dvb-core
ccflags-y += -Idrivers/media/dvb-frontends
ccflags-y += -Idrivers/media/tuners
ccflags-y += -Idrivers/media/usb/dvb-usb-v2

1471
drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c Normal file
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File diff suppressed because it is too large Load Diff

54
drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.h Normal file
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@ -0,0 +1,54 @@
/*
* Realtek RTL2832U SDR driver
*
* Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* GNU Radio plugin "gr-kernel" for device usage will be on:
* http://git.linuxtv.org/anttip/gr-kernel.git
*
* TODO:
* Help is very highly welcome for these + all the others you could imagine:
* - move controls to V4L2 API
* - use libv4l2 for stream format conversions
* - gr-kernel: switch to v4l2_mmap (current read eats a lot of cpu)
* - SDRSharp support
*/
#ifndef RTL2832_SDR_H
#define RTL2832_SDR_H
#include <linux/kconfig.h>
#include <media/v4l2-subdev.h>
/* for config struct */
#include "rtl2832.h"
#if IS_ENABLED(CONFIG_DVB_RTL2832_SDR)
extern struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, const struct rtl2832_config *cfg,
struct v4l2_subdev *sd);
#else
static inline struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, const struct rtl2832_config *cfg,
struct v4l2_subdev *sd)
{
dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
#endif
#endif /* RTL2832_SDR_H */