1 /* 2 * Realtek RTL2832U SDR driver 3 * 4 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License along 17 * with this program; if not, write to the Free Software Foundation, Inc., 18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * GNU Radio plugin "gr-kernel" for device usage will be on: 21 * http://git.linuxtv.org/anttip/gr-kernel.git 22 * 23 * TODO: 24 * Help is very highly welcome for these + all the others you could imagine: 25 * - move controls to V4L2 API 26 * - use libv4l2 for stream format conversions 27 * - gr-kernel: switch to v4l2_mmap (current read eats a lot of cpu) 28 * - SDRSharp support 29 */ 30 31 #ifndef RTL2832_SDR_H 32 #define RTL2832_SDR_H 33 34 #include <linux/kconfig.h> 35 #include <media/v4l2-subdev.h> 36 37 /* for config struct */ 38 #include "rtl2832.h" 39 40 #if IS_ENABLED(CONFIG_DVB_RTL2832_SDR) 41 extern struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe, 42 struct i2c_adapter *i2c, const struct rtl2832_config *cfg, 43 struct v4l2_subdev *sd); 44 #else 45 static inline struct dvb_frontend *rtl2832_sdr_attach(struct dvb_frontend *fe, 46 struct i2c_adapter *i2c, const struct rtl2832_config *cfg, 47 struct v4l2_subdev *sd) 48 { 49 dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__); 50 return NULL; 51 } 52 #endif 53 54 #endif /* RTL2832_SDR_H */ 55