diff options
Diffstat (limited to 'drivers/media/dvb-frontends/tdhd1.h')
| -rw-r--r-- | drivers/media/dvb-frontends/tdhd1.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/tdhd1.h b/drivers/media/dvb-frontends/tdhd1.h new file mode 100644 index 000000000..68358c0d8 --- /dev/null +++ b/drivers/media/dvb-frontends/tdhd1.h @@ -0,0 +1,71 @@ +/* + * tdhd1.h - ALPS TDHD1-204A tuner support + * + * Copyright (C) 2008 Oliver Endriss <o.endriss@gmx.de> + * + * + * 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. + * To obtain the license, point your browser to + * http://www.gnu.org/copyleft/gpl.html + * + * + * The project's page is at https://linuxtv.org + */ + +#ifndef TDHD1_H +#define TDHD1_H + +#include "tda1004x.h" + +static int alps_tdhd1_204_request_firmware(struct dvb_frontend *fe, const struct firmware **fw, char *name); + +static struct tda1004x_config alps_tdhd1_204a_config = { + .demod_address = 0x8, + .invert = 1, + .invert_oclk = 0, + .xtal_freq = TDA10046_XTAL_4M, + .agc_config = TDA10046_AGC_DEFAULT, + .if_freq = TDA10046_FREQ_3617, + .request_firmware = alps_tdhd1_204_request_firmware +}; + +static int alps_tdhd1_204a_tuner_set_params(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct i2c_adapter *i2c = fe->tuner_priv; + u8 data[4]; + struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) }; + u32 div; + + div = (p->frequency + 36166666) / 166666; + + data[0] = (div >> 8) & 0x7f; + data[1] = div & 0xff; + data[2] = 0x85; + + if (p->frequency >= 174000000 && p->frequency <= 230000000) + data[3] = 0x02; + else if (p->frequency >= 470000000 && p->frequency <= 823000000) + data[3] = 0x0C; + else if (p->frequency > 823000000 && p->frequency <= 862000000) + data[3] = 0x8C; + else + return -EINVAL; + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + if (i2c_transfer(i2c, &msg, 1) != 1) + return -EIO; + + return 0; +} + +#endif /* TDHD1_H */ |