1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Driver for Zarlink DVB-T MT352 demodulator 4 * 5 * Written by Holger Waechtler <holger@qanu.de> 6 * and Daniel Mack <daniel@qanu.de> 7 * 8 * AVerMedia AVerTV DVB-T 771 support by 9 * Wolfram Joost <dbox2@frokaschwei.de> 10 * 11 * Support for Samsung TDTC9251DH01C(M) tuner 12 * Copyright (C) 2004 Antonio Mancuso <antonio.mancuso@digitaltelevision.it> 13 * Amauri Celani <acelani@essegi.net> 14 * 15 * DVICO FusionHDTV DVB-T1 and DVICO FusionHDTV DVB-T Lite support by 16 * Christopher Pascoe <c.pascoe@itee.uq.edu.au> 17 */ 18 19 #ifndef MT352_H 20 #define MT352_H 21 22 #include <linux/dvb/frontend.h> 23 24 struct mt352_config 25 { 26 /* the demodulator's i2c address */ 27 u8 demod_address; 28 29 /* frequencies in kHz */ 30 int adc_clock; // default: 20480 31 int if2; // default: 36166 32 33 /* set if no pll is connected to the secondary i2c bus */ 34 int no_tuner; 35 36 /* Initialise the demodulator and PLL. Cannot be NULL */ 37 int (*demod_init)(struct dvb_frontend* fe); 38 }; 39 40 #if IS_REACHABLE(CONFIG_DVB_MT352) 41 extern struct dvb_frontend* mt352_attach(const struct mt352_config* config, 42 struct i2c_adapter* i2c); 43 #else mt352_attach(const struct mt352_config * config,struct i2c_adapter * i2c)44 static inline struct dvb_frontend* mt352_attach(const struct mt352_config* config, 45 struct i2c_adapter* i2c) 46 { 47 printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); 48 return NULL; 49 } 50 #endif // CONFIG_DVB_MT352 51 mt352_write(struct dvb_frontend * fe,const u8 buf[],int len)52 static inline int mt352_write(struct dvb_frontend *fe, const u8 buf[], int len) { 53 int r = 0; 54 if (fe->ops.write) 55 r = fe->ops.write(fe, buf, len); 56 return r; 57 } 58 59 #endif // MT352_H 60