drivers/media/usb/ttusb-dec/ttusbdecfe.c - vendor/opensource/backports - Git at Google

 /*
  * TTUSB DEC Frontend Driver
  *
  * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
  *
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */

 #include "dvb_frontend.h"
 #include "ttusbdecfe.h"


 #define LOF_HI			10600000
 #define LOF_LO			9750000

 struct ttusbdecfe_state {

 	/* configuration settings */
 	const struct ttusbdecfe_config* config;

 	struct dvb_frontend frontend;

 	u8 hi_band;
 	u8 voltage;
 };


 static int ttusbdecfe_dvbs_read_status(struct dvb_frontend *fe,
 				       enum fe_status *status)
 {
 	*status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
 		FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
 	return 0;
 }


 static int ttusbdecfe_dvbt_read_status(struct dvb_frontend *fe,
 				       enum fe_status *status)
 {
 	struct ttusbdecfe_state* state = fe->demodulator_priv;
 	u8 b[] = { 0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00 };
 	u8 result[4];
 	int len, ret;

 	*status=0;

 	ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
 	if(ret)
 		return ret;

 	if(len != 4) {
 		printk(KERN_ERR "%s: unexpected reply\n", __func__);
 		return -EIO;
 	}

 	switch(result[3]) {
 		case 1:  /* not tuned yet */
 		case 2:  /* no signal/no lock*/
 			break;
 		case 3:	 /* signal found and locked*/
 			*status = FE_HAS_SIGNAL | FE_HAS_VITERBI |
 			FE_HAS_SYNC | FE_HAS_CARRIER | FE_HAS_LOCK;
 			break;
 		case 4:
 			*status = FE_TIMEDOUT;
 			break;
 		default:
 			pr_info("%s: returned unknown value: %d\n",
 				__func__, result[3]);
 			return -EIO;
 	}

 	return 0;
 }

 static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend *fe)
 {
 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 	u8 b[] = { 0x00, 0x00, 0x00, 0x03,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x01,
 		   0x00, 0x00, 0x00, 0xff,
 		   0x00, 0x00, 0x00, 0xff };

 	__be32 freq = htonl(p->frequency / 1000);
 	memcpy(&b[4], &freq, sizeof (u32));
 	state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

 	return 0;
 }

 static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
 					struct dvb_frontend_tune_settings* fesettings)
 {
 		fesettings->min_delay_ms = 1500;
 		/* Drift compensation makes no sense for DVB-T */
 		fesettings->step_size = 0;
 		fesettings->max_drift = 0;
 		return 0;
 }

 static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend *fe)
 {
 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

 	u8 b[] = { 0x00, 0x00, 0x00, 0x01,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x01,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00 };
 	__be32 freq;
 	__be32 sym_rate;
 	__be32 band;
 	__be32 lnb_voltage;

 	freq = htonl(p->frequency +
 	       (state->hi_band ? LOF_HI : LOF_LO));
 	memcpy(&b[4], &freq, sizeof(u32));
 	sym_rate = htonl(p->symbol_rate);
 	memcpy(&b[12], &sym_rate, sizeof(u32));
 	band = htonl(state->hi_band ? LOF_HI : LOF_LO);
 	memcpy(&b[24], &band, sizeof(u32));
 	lnb_voltage = htonl(state->voltage);
 	memcpy(&b[28], &lnb_voltage, sizeof(u32));

 	state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

 	return 0;
 }

 static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
 {
 	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 	u8 b[] = { 0x00, 0xff, 0x00, 0x00,
 		   0x00, 0x00, 0x00, 0x00,
 		   0x00, 0x00 };

 	if (cmd->msg_len > sizeof(b) - 4)
 		return -EINVAL;

 	memcpy(&b[4], cmd->msg, cmd->msg_len);

 	state->config->send_command(fe, 0x72,
 				    sizeof(b) - (6 - cmd->msg_len), b,
 				    NULL, NULL);

 	return 0;
 }


 static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend *fe,
 				    enum fe_sec_tone_mode tone)
 {
 	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

 	state->hi_band = (SEC_TONE_ON == tone);

 	return 0;
 }


 static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend *fe,
 				       enum fe_sec_voltage voltage)
 {
 	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

 	switch (voltage) {
 	case SEC_VOLTAGE_13:
 		state->voltage = 13;
 		break;
 	case SEC_VOLTAGE_18:
 		state->voltage = 18;
 		break;
 	default:
 		return -EINVAL;
 	}

 	return 0;
 }

 static void ttusbdecfe_release(struct dvb_frontend* fe)
 {
 	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
 	kfree(state);
 }

 static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;

 struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
 {
 	struct ttusbdecfe_state* state = NULL;

 	/* allocate memory for the internal state */
 	state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 	if (state == NULL)
 		return NULL;

 	/* setup the state */
 	state->config = config;

 	/* create dvb_frontend */
 	memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;
 }

 static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;

 struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
 {
 	struct ttusbdecfe_state* state = NULL;

 	/* allocate memory for the internal state */
 	state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
 	if (state == NULL)
 		return NULL;

 	/* setup the state */
 	state->config = config;
 	state->voltage = 0;
 	state->hi_band = 0;

 	/* create dvb_frontend */
 	memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;
 	return &state->frontend;
 }

 static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {
 	.delsys = { SYS_DVBT },
 	.info = {
 		.name			= "TechnoTrend/Hauppauge DEC2000-t Frontend",
 		.frequency_min		= 51000000,
 		.frequency_max		= 858000000,
 		.frequency_stepsize	= 62500,
 		.caps =	FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 			FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
 			FE_CAN_HIERARCHY_AUTO,
 	},

 	.release = ttusbdecfe_release,

 	.set_frontend = ttusbdecfe_dvbt_set_frontend,

 	.get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,

 	.read_status = ttusbdecfe_dvbt_read_status,
 };

 static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {
 	.delsys = { SYS_DVBS },
 	.info = {
 		.name			= "TechnoTrend/Hauppauge DEC3000-s Frontend",
 		.frequency_min		= 950000,
 		.frequency_max		= 2150000,
 		.frequency_stepsize	= 125,
 		.symbol_rate_min        = 1000000,  /* guessed */
 		.symbol_rate_max        = 45000000, /* guessed */
 		.caps =	FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 			FE_CAN_QPSK
 	},

 	.release = ttusbdecfe_release,

 	.set_frontend = ttusbdecfe_dvbs_set_frontend,

 	.read_status = ttusbdecfe_dvbs_read_status,

 	.diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
 	.set_voltage = ttusbdecfe_dvbs_set_voltage,
 	.set_tone = ttusbdecfe_dvbs_set_tone,
 };

 MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
 MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
 MODULE_LICENSE("GPL");

 EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
 EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);
	/*
	* TTUSB DEC Frontend Driver
	*
	* Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
	*
	* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*
	*/

	#include "dvb_frontend.h"
	#include "ttusbdecfe.h"


	#define LOF_HI 10600000
	#define LOF_LO 9750000

	struct ttusbdecfe_state {

	/* configuration settings */
	const struct ttusbdecfe_config* config;

	struct dvb_frontend frontend;

	u8 hi_band;
	u8 voltage;
	};


	static int ttusbdecfe_dvbs_read_status(struct dvb_frontend *fe,
	enum fe_status *status)
	{
	*status = FE_HAS_SIGNAL \| FE_HAS_VITERBI \|
	FE_HAS_SYNC \| FE_HAS_CARRIER \| FE_HAS_LOCK;
	return 0;
	}


	static int ttusbdecfe_dvbt_read_status(struct dvb_frontend *fe,
	enum fe_status *status)
	{
	struct ttusbdecfe_state* state = fe->demodulator_priv;
	u8 b[] = { 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00 };
	u8 result[4];
	int len, ret;

	*status=0;

	ret=state->config->send_command(fe, 0x73, sizeof(b), b, &len, result);
	if(ret)
	return ret;

	if(len != 4) {
	printk(KERN_ERR "%s: unexpected reply\n", __func__);
	return -EIO;
	}

	switch(result[3]) {
	case 1: /* not tuned yet */
	case 2: /* no signal/no lock*/
	break;
	case 3: /* signal found and locked*/
	*status = FE_HAS_SIGNAL \| FE_HAS_VITERBI \|
	FE_HAS_SYNC \| FE_HAS_CARRIER \| FE_HAS_LOCK;
	break;
	case 4:
	*status = FE_TIMEDOUT;
	break;
	default:
	pr_info("%s: returned unknown value: %d\n",
	__func__, result[3]);
	return -EIO;
	}

	return 0;
	}

	static int ttusbdecfe_dvbt_set_frontend(struct dvb_frontend *fe)
	{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
	u8 b[] = { 0x00, 0x00, 0x00, 0x03,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x01,
	0x00, 0x00, 0x00, 0xff,
	0x00, 0x00, 0x00, 0xff };

	__be32 freq = htonl(p->frequency / 1000);
	memcpy(&b[4], &freq, sizeof (u32));
	state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

	return 0;
	}

	static int ttusbdecfe_dvbt_get_tune_settings(struct dvb_frontend* fe,
	struct dvb_frontend_tune_settings* fesettings)
	{
	fesettings->min_delay_ms = 1500;
	/* Drift compensation makes no sense for DVB-T */
	fesettings->step_size = 0;
	fesettings->max_drift = 0;
	return 0;
	}

	static int ttusbdecfe_dvbs_set_frontend(struct dvb_frontend *fe)
	{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

	u8 b[] = { 0x00, 0x00, 0x00, 0x01,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x01,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00 };
	__be32 freq;
	__be32 sym_rate;
	__be32 band;
	__be32 lnb_voltage;

	freq = htonl(p->frequency +
	(state->hi_band ? LOF_HI : LOF_LO));
	memcpy(&b[4], &freq, sizeof(u32));
	sym_rate = htonl(p->symbol_rate);
	memcpy(&b[12], &sym_rate, sizeof(u32));
	band = htonl(state->hi_band ? LOF_HI : LOF_LO);
	memcpy(&b[24], &band, sizeof(u32));
	lnb_voltage = htonl(state->voltage);
	memcpy(&b[28], &lnb_voltage, sizeof(u32));

	state->config->send_command(fe, 0x71, sizeof(b), b, NULL, NULL);

	return 0;
	}

	static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *cmd)
	{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
	u8 b[] = { 0x00, 0xff, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
	0x00, 0x00 };

	if (cmd->msg_len > sizeof(b) - 4)
	return -EINVAL;

	memcpy(&b[4], cmd->msg, cmd->msg_len);

	state->config->send_command(fe, 0x72,
	sizeof(b) - (6 - cmd->msg_len), b,
	NULL, NULL);

	return 0;
	}


	static int ttusbdecfe_dvbs_set_tone(struct dvb_frontend *fe,
	enum fe_sec_tone_mode tone)
	{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

	state->hi_band = (SEC_TONE_ON == tone);

	return 0;
	}


	static int ttusbdecfe_dvbs_set_voltage(struct dvb_frontend *fe,
	enum fe_sec_voltage voltage)
	{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;

	switch (voltage) {
	case SEC_VOLTAGE_13:
	state->voltage = 13;
	break;
	case SEC_VOLTAGE_18:
	state->voltage = 18;
	break;
	default:
	return -EINVAL;
	}

	return 0;
	}

	static void ttusbdecfe_release(struct dvb_frontend* fe)
	{
	struct ttusbdecfe_state* state = (struct ttusbdecfe_state*) fe->demodulator_priv;
	kfree(state);
	}

	static struct dvb_frontend_ops ttusbdecfe_dvbt_ops;

	struct dvb_frontend* ttusbdecfe_dvbt_attach(const struct ttusbdecfe_config* config)
	{
	struct ttusbdecfe_state* state = NULL;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
	if (state == NULL)
	return NULL;

	/* setup the state */
	state->config = config;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &ttusbdecfe_dvbt_ops, sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;
	}

	static struct dvb_frontend_ops ttusbdecfe_dvbs_ops;

	struct dvb_frontend* ttusbdecfe_dvbs_attach(const struct ttusbdecfe_config* config)
	{
	struct ttusbdecfe_state* state = NULL;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct ttusbdecfe_state), GFP_KERNEL);
	if (state == NULL)
	return NULL;

	/* setup the state */
	state->config = config;
	state->voltage = 0;
	state->hi_band = 0;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &ttusbdecfe_dvbs_ops, sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;
	}

	static struct dvb_frontend_ops ttusbdecfe_dvbt_ops = {
	.delsys = { SYS_DVBT },
	.info = {
	.name = "TechnoTrend/Hauppauge DEC2000-t Frontend",
	.frequency_min = 51000000,
	.frequency_max = 858000000,
	.frequency_stepsize = 62500,
	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	FE_CAN_FEC_5_6 \| FE_CAN_FEC_7_8 \| FE_CAN_FEC_AUTO \|
	FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	FE_CAN_TRANSMISSION_MODE_AUTO \| FE_CAN_GUARD_INTERVAL_AUTO \|
	FE_CAN_HIERARCHY_AUTO,
	},

	.release = ttusbdecfe_release,

	.set_frontend = ttusbdecfe_dvbt_set_frontend,

	.get_tune_settings = ttusbdecfe_dvbt_get_tune_settings,

	.read_status = ttusbdecfe_dvbt_read_status,
	};

	static struct dvb_frontend_ops ttusbdecfe_dvbs_ops = {
	.delsys = { SYS_DVBS },
	.info = {
	.name = "TechnoTrend/Hauppauge DEC3000-s Frontend",
	.frequency_min = 950000,
	.frequency_max = 2150000,
	.frequency_stepsize = 125,
	.symbol_rate_min = 1000000, /* guessed */
	.symbol_rate_max = 45000000, /* guessed */
	.caps = FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	FE_CAN_FEC_5_6 \| FE_CAN_FEC_7_8 \| FE_CAN_FEC_AUTO \|
	FE_CAN_QPSK
	},

	.release = ttusbdecfe_release,

	.set_frontend = ttusbdecfe_dvbs_set_frontend,

	.read_status = ttusbdecfe_dvbs_read_status,

	.diseqc_send_master_cmd = ttusbdecfe_dvbs_diseqc_send_master_cmd,
	.set_voltage = ttusbdecfe_dvbs_set_voltage,
	.set_tone = ttusbdecfe_dvbs_set_tone,
	};

	MODULE_DESCRIPTION("TTUSB DEC DVB-T/S Demodulator driver");
	MODULE_AUTHOR("Alex Woods/Andrew de Quincey");
	MODULE_LICENSE("GPL");

	EXPORT_SYMBOL(ttusbdecfe_dvbt_attach);
	EXPORT_SYMBOL(ttusbdecfe_dvbs_attach);