[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / dvb / dvb-usb / dtt200u-fe.c

/* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/
 * Typhoon/ Yuan DVB-T USB2.0 receiver.
 *
 * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.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, version 2.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */
#include "dtt200u.h"

struct dtt200u_fe_state {
	struct dvb_usb_device *d;

	fe_status_t stat;

	struct dvb_frontend_parameters fep;
	struct dvb_frontend frontend;
};

static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	u8 st = GET_TUNE_STATUS, b[3];

	dvb_usb_generic_rw(state->d,&st,1,b,3,0);

	switch (b[0]) {
		case 0x01:
			*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
				FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
			break;
		case 0x00: /* pending */
			*stat = FE_TIMEDOUT; /* during set_frontend */
			break;
		default:
		case 0x02: /* failed */
			*stat = 0;
			break;
	}
	return 0;
}

static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	u8 bw = GET_VIT_ERR_CNT,b[3];
	dvb_usb_generic_rw(state->d,&bw,1,b,3,0);
	*ber = (b[0] << 16) | (b[1] << 8) | b[2];
	return 0;
}

static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	u8 bw = GET_RS_UNCOR_BLK_CNT,b[2];

	dvb_usb_generic_rw(state->d,&bw,1,b,2,0);
	*unc = (b[0] << 8) | b[1];
	return 0;
}

static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	u8 bw = GET_AGC, b;
	dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
	*strength = (b << 8) | b;
	return 0;
}

static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	u8 bw = GET_SNR,br;
	dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
	*snr = ~((br << 8) | br);
	return 0;
}

static int dtt200u_fe_init(struct dvb_frontend* fe)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	u8 b = SET_INIT;
	return dvb_usb_generic_write(state->d,&b,1);
}

static int dtt200u_fe_sleep(struct dvb_frontend* fe)
{
	return dtt200u_fe_init(fe);
}

static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
	tune->min_delay_ms = 1500;
	tune->step_size = 0;
	tune->max_drift = 0;
	return 0;
}

static int dtt200u_fe_set_frontend(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *fep)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	int i;
	fe_status_t st;
	u16 freq = fep->frequency / 250000;
	u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 };

	switch (fep->u.ofdm.bandwidth) {
		case BANDWIDTH_8_MHZ: bwbuf[1] = 8; break;
		case BANDWIDTH_7_MHZ: bwbuf[1] = 7; break;
		case BANDWIDTH_6_MHZ: bwbuf[1] = 6; break;
		case BANDWIDTH_AUTO: return -EOPNOTSUPP;
		default:
			return -EINVAL;
	}

	dvb_usb_generic_write(state->d,bwbuf,2);

	freqbuf[1] = freq & 0xff;
	freqbuf[2] = (freq >> 8) & 0xff;
	dvb_usb_generic_write(state->d,freqbuf,3);

	for (i = 0; i < 30; i++) {
		msleep(20);
		dtt200u_fe_read_status(fe, &st);
		if (st & FE_TIMEDOUT)
			continue;
	}

	return 0;
}

static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *fep)
{
	struct dtt200u_fe_state *state = fe->demodulator_priv;
	memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters));
	return 0;
}

static void dtt200u_fe_release(struct dvb_frontend* fe)
{
	struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops dtt200u_fe_ops;

struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
{
	struct dtt200u_fe_state* state = NULL;

	/* allocate memory for the internal state */
	state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	deb_info("attaching frontend dtt200u\n");

	state->d = d;

	memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;

	return &state->frontend;
error:
	return NULL;
}

static struct dvb_frontend_ops dtt200u_fe_ops = {
	.info = {
		.name			= "WideView USB DVB-T",
		.type			= FE_OFDM,
		.frequency_min		= 44250000,
		.frequency_max		= 867250000,
		.frequency_stepsize	= 250000,
		.caps = FE_CAN_INVERSION_AUTO |
				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 | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
				FE_CAN_TRANSMISSION_MODE_AUTO |
				FE_CAN_GUARD_INTERVAL_AUTO |
				FE_CAN_RECOVER |
				FE_CAN_HIERARCHY_AUTO,
	},

	.release = dtt200u_fe_release,

	.init = dtt200u_fe_init,
	.sleep = dtt200u_fe_sleep,

	.set_frontend = dtt200u_fe_set_frontend,
	.get_frontend = dtt200u_fe_get_frontend,
	.get_tune_settings = dtt200u_fe_get_tune_settings,

	.read_status = dtt200u_fe_read_status,
	.read_ber = dtt200u_fe_read_ber,
	.read_signal_strength = dtt200u_fe_read_signal_strength,
	.read_snr = dtt200u_fe_read_snr,
	.read_ucblocks = dtt200u_fe_read_unc_blocks,
};
Commit	Line	Data
fb41f5a7 PB	1	/* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/
fb41f5a7 PB	2	* Typhoon/ Yuan DVB-T USB2.0 receiver.
776338e1 JS	3	*
	4	* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation, version 2.
	9	*
	10	* see Documentation/dvb/README.dvb-usb for more information
	11	*/
	12	#include "dtt200u.h"
	13
	14	struct dtt200u_fe_state {
	15	struct dvb_usb_device *d;
	16
d590f9c2 PB	17	fe_status_t stat;
d590f9c2 PB	18
776338e1 JS	19	struct dvb_frontend_parameters fep;
	20	struct dvb_frontend frontend;
	21	};
	22
776338e1 JS	23	static int dtt200u_fe_read_status(struct dvb_frontend* fe, fe_status_t *stat)
	24	{
	25	struct dtt200u_fe_state *state = fe->demodulator_priv;
d590f9c2 PB	26	u8 st = GET_TUNE_STATUS, b[3];
	27
	28	dvb_usb_generic_rw(state->d,&st,1,b,3,0);
776338e1	29
d590f9c2	30	switch (b[0]) {
776338e1	31	case 0x01:
d590f9c2 PB	32	*stat = FE_HAS_SIGNAL \| FE_HAS_CARRIER \|
d590f9c2 PB	33	FE_HAS_VITERBI \| FE_HAS_SYNC \| FE_HAS_LOCK;
776338e1	34	break;
d590f9c2 PB	35	case 0x00: /* pending */
d590f9c2 PB	36	stat = FE_TIMEDOUT; / during set_frontend */
776338e1 JS	37	break;
776338e1 JS	38	default:
d590f9c2 PB	39	case 0x02: /* failed */
d590f9c2 PB	40	*stat = 0;
776338e1 JS	41	break;
776338e1 JS	42	}
776338e1 JS	43	return 0;
776338e1 JS	44	}
d590f9c2	45
776338e1 JS	46	static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
	47	{
	48	struct dtt200u_fe_state *state = fe->demodulator_priv;
d590f9c2 PB	49	u8 bw = GET_VIT_ERR_CNT,b[3];
	50	dvb_usb_generic_rw(state->d,&bw,1,b,3,0);
	51	*ber = (b[0] << 16) \| (b[1] << 8) \| b[2];
776338e1 JS	52	return 0;
	53	}
	54
	55	static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
	56	{
	57	struct dtt200u_fe_state *state = fe->demodulator_priv;
d590f9c2 PB	58	u8 bw = GET_RS_UNCOR_BLK_CNT,b[2];
	59
	60	dvb_usb_generic_rw(state->d,&bw,1,b,2,0);
	61	*unc = (b[0] << 8) \| b[1];
776338e1 JS	62	return 0;
	63	}
	64
	65	static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
	66	{
	67	struct dtt200u_fe_state *state = fe->demodulator_priv;
d590f9c2	68	u8 bw = GET_AGC, b;
776338e1 JS	69	dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
	70	*strength = (b << 8) \| b;
	71	return 0;
	72	}
	73
	74	static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
	75	{
	76	struct dtt200u_fe_state *state = fe->demodulator_priv;
	77	u8 bw = GET_SNR,br;
	78	dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
	79	*snr = ~((br << 8) \| br);
	80	return 0;
	81	}
	82
	83	static int dtt200u_fe_init(struct dvb_frontend* fe)
	84	{
	85	struct dtt200u_fe_state *state = fe->demodulator_priv;
d590f9c2	86	u8 b = SET_INIT;
776338e1 JS	87	return dvb_usb_generic_write(state->d,&b,1);
	88	}
	89
	90	static int dtt200u_fe_sleep(struct dvb_frontend* fe)
	91	{
	92	return dtt200u_fe_init(fe);
	93	}
	94
	95	static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
	96	{
	97	tune->min_delay_ms = 1500;
d590f9c2 PB	98	tune->step_size = 0;
d590f9c2 PB	99	tune->max_drift = 0;
776338e1 JS	100	return 0;
	101	}
	102
	103	static int dtt200u_fe_set_frontend(struct dvb_frontend* fe,
	104	struct dvb_frontend_parameters *fep)
	105	{
	106	struct dtt200u_fe_state *state = fe->demodulator_priv;
d590f9c2 PB	107	int i;
d590f9c2 PB	108	fe_status_t st;
776338e1	109	u16 freq = fep->frequency / 250000;
d590f9c2	110	u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 };
776338e1 JS	111
776338e1 JS	112	switch (fep->u.ofdm.bandwidth) {
d590f9c2 PB	113	case BANDWIDTH_8_MHZ: bwbuf[1] = 8; break;
	114	case BANDWIDTH_7_MHZ: bwbuf[1] = 7; break;
	115	case BANDWIDTH_6_MHZ: bwbuf[1] = 6; break;
776338e1 JS	116	case BANDWIDTH_AUTO: return -EOPNOTSUPP;
	117	default:
	118	return -EINVAL;
	119	}
776338e1	120
776338e1 JS	121	dvb_usb_generic_write(state->d,bwbuf,2);
	122
	123	freqbuf[1] = freq & 0xff;
	124	freqbuf[2] = (freq >> 8) & 0xff;
	125	dvb_usb_generic_write(state->d,freqbuf,3);
	126
d590f9c2 PB	127	for (i = 0; i < 30; i++) {
	128	msleep(20);
	129	dtt200u_fe_read_status(fe, &st);
	130	if (st & FE_TIMEDOUT)
	131	continue;
	132	}
776338e1 JS	133
	134	return 0;
	135	}
	136
	137	static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
	138	struct dvb_frontend_parameters *fep)
	139	{
	140	struct dtt200u_fe_state *state = fe->demodulator_priv;
	141	memcpy(fep,&state->fep,sizeof(struct dvb_frontend_parameters));
	142	return 0;
	143	}
	144
	145	static void dtt200u_fe_release(struct dvb_frontend* fe)
	146	{
	147	struct dtt200u_fe_state state = (struct dtt200u_fe_state) fe->demodulator_priv;
	148	kfree(state);
	149	}
	150
	151	static struct dvb_frontend_ops dtt200u_fe_ops;
	152
	153	struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
	154	{
	155	struct dtt200u_fe_state* state = NULL;
	156
	157	/* allocate memory for the internal state */
7408187d	158	state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
776338e1 JS	159	if (state == NULL)
776338e1 JS	160	goto error;
776338e1 JS	161
	162	deb_info("attaching frontend dtt200u\n");
	163
	164	state->d = d;
	165
dea74869	166	memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
776338e1 JS	167	state->frontend.demodulator_priv = state;
776338e1 JS	168
8397703e	169	return &state->frontend;
776338e1 JS	170	error:
776338e1 JS	171	return NULL;
776338e1 JS	172	}
	173
	174	static struct dvb_frontend_ops dtt200u_fe_ops = {
	175	.info = {
d590f9c2	176	.name = "WideView USB DVB-T",
776338e1 JS	177	.type = FE_OFDM,
	178	.frequency_min = 44250000,
	179	.frequency_max = 867250000,
	180	.frequency_stepsize = 250000,
	181	.caps = FE_CAN_INVERSION_AUTO \|
	182	FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	183	FE_CAN_FEC_5_6 \| FE_CAN_FEC_7_8 \| FE_CAN_FEC_AUTO \|
	184	FE_CAN_QPSK \| FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	185	FE_CAN_TRANSMISSION_MODE_AUTO \|
	186	FE_CAN_GUARD_INTERVAL_AUTO \|
	187	FE_CAN_RECOVER \|
	188	FE_CAN_HIERARCHY_AUTO,
	189	},
	190
	191	.release = dtt200u_fe_release,
	192
	193	.init = dtt200u_fe_init,
	194	.sleep = dtt200u_fe_sleep,
	195
	196	.set_frontend = dtt200u_fe_set_frontend,
	197	.get_frontend = dtt200u_fe_get_frontend,
	198	.get_tune_settings = dtt200u_fe_get_tune_settings,
	199
	200	.read_status = dtt200u_fe_read_status,
	201	.read_ber = dtt200u_fe_read_ber,
	202	.read_signal_strength = dtt200u_fe_read_signal_strength,
	203	.read_snr = dtt200u_fe_read_snr,
	204	.read_ucblocks = dtt200u_fe_read_unc_blocks,
	205	};