1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/ |
3 | * Typhoon/ Yuan DVB-T USB2.0 receiver. |
4 | * |
5 | * Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de> |
6 | * |
7 | * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information |
8 | */ |
9 | #include "dtt200u.h" |
10 | |
11 | struct dtt200u_fe_state { |
12 | struct dvb_usb_device *d; |
13 | |
14 | enum fe_status stat; |
15 | |
16 | struct dtv_frontend_properties fep; |
17 | struct dvb_frontend frontend; |
18 | |
19 | unsigned char data[80]; |
20 | struct mutex data_mutex; |
21 | }; |
22 | |
23 | static int dtt200u_fe_read_status(struct dvb_frontend *fe, |
24 | enum fe_status *stat) |
25 | { |
26 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
27 | int ret; |
28 | |
29 | mutex_lock(&state->data_mutex); |
30 | state->data[0] = GET_TUNE_STATUS; |
31 | |
32 | ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0); |
33 | if (ret < 0) { |
34 | *stat = 0; |
35 | mutex_unlock(lock: &state->data_mutex); |
36 | return ret; |
37 | } |
38 | |
39 | switch (state->data[0]) { |
40 | case 0x01: |
41 | *stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | |
42 | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; |
43 | break; |
44 | case 0x00: /* pending */ |
45 | *stat = FE_TIMEDOUT; /* during set_frontend */ |
46 | break; |
47 | default: |
48 | case 0x02: /* failed */ |
49 | *stat = 0; |
50 | break; |
51 | } |
52 | mutex_unlock(lock: &state->data_mutex); |
53 | return 0; |
54 | } |
55 | |
56 | static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber) |
57 | { |
58 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
59 | int ret; |
60 | |
61 | mutex_lock(&state->data_mutex); |
62 | state->data[0] = GET_VIT_ERR_CNT; |
63 | |
64 | ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 3, 0); |
65 | if (ret >= 0) |
66 | *ber = (state->data[0] << 16) | (state->data[1] << 8) | state->data[2]; |
67 | |
68 | mutex_unlock(lock: &state->data_mutex); |
69 | return ret; |
70 | } |
71 | |
72 | static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc) |
73 | { |
74 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
75 | int ret; |
76 | |
77 | mutex_lock(&state->data_mutex); |
78 | state->data[0] = GET_RS_UNCOR_BLK_CNT; |
79 | |
80 | ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 2, 0); |
81 | if (ret >= 0) |
82 | *unc = (state->data[0] << 8) | state->data[1]; |
83 | |
84 | mutex_unlock(lock: &state->data_mutex); |
85 | return ret; |
86 | } |
87 | |
88 | static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength) |
89 | { |
90 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
91 | int ret; |
92 | |
93 | mutex_lock(&state->data_mutex); |
94 | state->data[0] = GET_AGC; |
95 | |
96 | ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0); |
97 | if (ret >= 0) |
98 | *strength = (state->data[0] << 8) | state->data[0]; |
99 | |
100 | mutex_unlock(lock: &state->data_mutex); |
101 | return ret; |
102 | } |
103 | |
104 | static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr) |
105 | { |
106 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
107 | int ret; |
108 | |
109 | mutex_lock(&state->data_mutex); |
110 | state->data[0] = GET_SNR; |
111 | |
112 | ret = dvb_usb_generic_rw(state->d, state->data, 1, state->data, 1, 0); |
113 | if (ret >= 0) |
114 | *snr = ~((state->data[0] << 8) | state->data[0]); |
115 | |
116 | mutex_unlock(lock: &state->data_mutex); |
117 | return ret; |
118 | } |
119 | |
120 | static int dtt200u_fe_init(struct dvb_frontend* fe) |
121 | { |
122 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
123 | int ret; |
124 | |
125 | mutex_lock(&state->data_mutex); |
126 | state->data[0] = SET_INIT; |
127 | |
128 | ret = dvb_usb_generic_write(state->d, state->data, 1); |
129 | mutex_unlock(lock: &state->data_mutex); |
130 | |
131 | return ret; |
132 | } |
133 | |
134 | static int dtt200u_fe_sleep(struct dvb_frontend* fe) |
135 | { |
136 | return dtt200u_fe_init(fe); |
137 | } |
138 | |
139 | static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune) |
140 | { |
141 | tune->min_delay_ms = 1500; |
142 | tune->step_size = 0; |
143 | tune->max_drift = 0; |
144 | return 0; |
145 | } |
146 | |
147 | static int dtt200u_fe_set_frontend(struct dvb_frontend *fe) |
148 | { |
149 | struct dtv_frontend_properties *fep = &fe->dtv_property_cache; |
150 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
151 | int ret; |
152 | u16 freq = fep->frequency / 250000; |
153 | |
154 | mutex_lock(&state->data_mutex); |
155 | state->data[0] = SET_BANDWIDTH; |
156 | switch (fep->bandwidth_hz) { |
157 | case 8000000: |
158 | state->data[1] = 8; |
159 | break; |
160 | case 7000000: |
161 | state->data[1] = 7; |
162 | break; |
163 | case 6000000: |
164 | state->data[1] = 6; |
165 | break; |
166 | default: |
167 | ret = -EINVAL; |
168 | goto ret; |
169 | } |
170 | |
171 | ret = dvb_usb_generic_write(state->d, state->data, 2); |
172 | if (ret < 0) |
173 | goto ret; |
174 | |
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); |
179 | if (ret < 0) |
180 | goto ret; |
181 | |
182 | ret: |
183 | mutex_unlock(lock: &state->data_mutex); |
184 | return ret; |
185 | } |
186 | |
187 | static int dtt200u_fe_get_frontend(struct dvb_frontend* fe, |
188 | struct dtv_frontend_properties *fep) |
189 | { |
190 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
191 | |
192 | memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties)); |
193 | return 0; |
194 | } |
195 | |
196 | static void dtt200u_fe_release(struct dvb_frontend* fe) |
197 | { |
198 | struct dtt200u_fe_state *state = fe->demodulator_priv; |
199 | kfree(objp: state); |
200 | } |
201 | |
202 | static const struct dvb_frontend_ops dtt200u_fe_ops; |
203 | |
204 | struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d) |
205 | { |
206 | struct dtt200u_fe_state* state = NULL; |
207 | |
208 | /* allocate memory for the internal state */ |
209 | state = kzalloc(size: sizeof(struct dtt200u_fe_state), GFP_KERNEL); |
210 | if (state == NULL) |
211 | goto error; |
212 | |
213 | deb_info("attaching frontend dtt200u\n" ); |
214 | |
215 | state->d = d; |
216 | mutex_init(&state->data_mutex); |
217 | |
218 | memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops)); |
219 | state->frontend.demodulator_priv = state; |
220 | |
221 | return &state->frontend; |
222 | error: |
223 | return NULL; |
224 | } |
225 | |
226 | static const struct dvb_frontend_ops dtt200u_fe_ops = { |
227 | .delsys = { SYS_DVBT }, |
228 | .info = { |
229 | .name = "WideView USB DVB-T" , |
230 | .frequency_min_hz = 44250 * kHz, |
231 | .frequency_max_hz = 867250 * kHz, |
232 | .frequency_stepsize_hz = 250 * kHz, |
233 | .caps = FE_CAN_INVERSION_AUTO | |
234 | FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | |
235 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | |
236 | FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | |
237 | FE_CAN_TRANSMISSION_MODE_AUTO | |
238 | FE_CAN_GUARD_INTERVAL_AUTO | |
239 | FE_CAN_RECOVER | |
240 | FE_CAN_HIERARCHY_AUTO, |
241 | }, |
242 | |
243 | .release = dtt200u_fe_release, |
244 | |
245 | .init = dtt200u_fe_init, |
246 | .sleep = dtt200u_fe_sleep, |
247 | |
248 | .set_frontend = dtt200u_fe_set_frontend, |
249 | .get_frontend = dtt200u_fe_get_frontend, |
250 | .get_tune_settings = dtt200u_fe_get_tune_settings, |
251 | |
252 | .read_status = dtt200u_fe_read_status, |
253 | .read_ber = dtt200u_fe_read_ber, |
254 | .read_signal_strength = dtt200u_fe_read_signal_strength, |
255 | .read_snr = dtt200u_fe_read_snr, |
256 | .read_ucblocks = dtt200u_fe_read_unc_blocks, |
257 | }; |
258 | |