usb/dvb-usb/dtt200u-fe.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * Typhoon/ Yuan DVB-T USB2.0 receiver.
7  * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
26 	struct dtt200u_fe_state *state = fe->demodulator_priv;
29 	mutex_lock(&state->data_mutex);
30 	state->data[0] = GET_TUNE_STATUS;
32 	ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0);
35 		mutex_unlock(&state->data_mutex);
39 	switch (state->data[0]) {
52 	mutex_unlock(&state->data_mutex);
58 	struct dtt200u_fe_state *state = fe->demodulator_priv;
61 	mutex_lock(&state->data_mutex);
62 	state->data[0] = GET_VIT_ERR_CNT;
64 	ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0);
66 		*ber = (state->data[0] << 16) | (state->data[1] << 8) | state->data[2];
68 	mutex_unlock(&state->data_mutex);
74 	struct dtt200u_fe_state *state = fe->demodulator_priv;
77 	mutex_lock(&state->data_mutex);
78 	state->data[0] = GET_RS_UNCOR_BLK_CNT;
80 	ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 2, 0);
82 		*unc = (state->data[0] << 8) | state->data[1];
84 	mutex_unlock(&state->data_mutex);
90 	struct dtt200u_fe_state *state = fe->demodulator_priv;
93 	mutex_lock(&state->data_mutex);
94 	state->data[0] = GET_AGC;
96 	ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0);
98 		*strength = (state->data[0] << 8) | state->data[0];
100 	mutex_unlock(&state->data_mutex);
106 	struct dtt200u_fe_state *state = fe->demodulator_priv;
109 	mutex_lock(&state->data_mutex);
110 	state->data[0] = GET_SNR;
112 	ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0);
114 		*snr = ~((state->data[0] << 8) | state->data[0]);
116 	mutex_unlock(&state->data_mutex);
122 	struct dtt200u_fe_state *state = fe->demodulator_priv;
125 	mutex_lock(&state->data_mutex);
126 	state->data[0] = SET_INIT;
128 	ret = dvb_usb_generic_write(state->d, state->data, 1);
129 	mutex_unlock(&state->data_mutex);
141 	tune->min_delay_ms = 1500;
142 	tune->step_size = 0;
143 	tune->max_drift = 0;
149 	struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
150 	struct dtt200u_fe_state *state = fe->demodulator_priv;
152 	u16 freq = fep->frequency / 250000;
154 	mutex_lock(&state->data_mutex);
155 	state->data[0] = SET_BANDWIDTH;
156 	switch (fep->bandwidth_hz) {
158 		state->data[1] = 8;
161 		state->data[1] = 7;
164 		state->data[1] = 6;
167 		ret = -EINVAL;
171 	ret = dvb_usb_generic_write(state->d, state->data, 2);
175 	state->data[0] = SET_RF_FREQ;
176 	state->data[1] = freq & 0xff;
177 	state->data[2] = (freq >> 8) & 0xff;
178 	ret = dvb_usb_generic_write(state->d, state->data, 3);
183 	mutex_unlock(&state->data_mutex);
190 	struct dtt200u_fe_state *state = fe->demodulator_priv;
192 	memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties));
198 	struct dtt200u_fe_state *state = fe->demodulator_priv;
199 	kfree(state);
206 	struct dtt200u_fe_state* state = NULL;
208 	/* allocate memory for the internal state */
209 	state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
210 	if (state == NULL)
215 	state->d = d;
216 	mutex_init(&state->data_mutex);
218 	memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
219 	state->frontend.demodulator_priv = state;
221 	return &state->frontend;
229 		.name			= "WideView USB DVB-T",