treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
[sfrench/cifs-2.6.git] / drivers / media / dvb-frontends / dvb_dummy_fe.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Driver for Dummy Frontend
4  *
5  *  Written by Emard <emard@softhome.net>
6  */
7
8 #include <linux/module.h>
9 #include <linux/init.h>
10 #include <linux/string.h>
11 #include <linux/slab.h>
12
13 #include <media/dvb_frontend.h>
14 #include "dvb_dummy_fe.h"
15
16
17 struct dvb_dummy_fe_state {
18         struct dvb_frontend frontend;
19 };
20
21
22 static int dvb_dummy_fe_read_status(struct dvb_frontend *fe,
23                                     enum fe_status *status)
24 {
25         *status = FE_HAS_SIGNAL
26                 | FE_HAS_CARRIER
27                 | FE_HAS_VITERBI
28                 | FE_HAS_SYNC
29                 | FE_HAS_LOCK;
30
31         return 0;
32 }
33
34 static int dvb_dummy_fe_read_ber(struct dvb_frontend* fe, u32* ber)
35 {
36         *ber = 0;
37         return 0;
38 }
39
40 static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend* fe, u16* strength)
41 {
42         *strength = 0;
43         return 0;
44 }
45
46 static int dvb_dummy_fe_read_snr(struct dvb_frontend* fe, u16* snr)
47 {
48         *snr = 0;
49         return 0;
50 }
51
52 static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
53 {
54         *ucblocks = 0;
55         return 0;
56 }
57
58 /*
59  * Should only be implemented if it actually reads something from the hardware.
60  * Also, it should check for the locks, in order to avoid report wrong data
61  * to userspace.
62  */
63 static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe,
64                                      struct dtv_frontend_properties *p)
65 {
66         return 0;
67 }
68
69 static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
70 {
71         if (fe->ops.tuner_ops.set_params) {
72                 fe->ops.tuner_ops.set_params(fe);
73                 if (fe->ops.i2c_gate_ctrl)
74                         fe->ops.i2c_gate_ctrl(fe, 0);
75         }
76
77         return 0;
78 }
79
80 static int dvb_dummy_fe_sleep(struct dvb_frontend* fe)
81 {
82         return 0;
83 }
84
85 static int dvb_dummy_fe_init(struct dvb_frontend* fe)
86 {
87         return 0;
88 }
89
90 static int dvb_dummy_fe_set_tone(struct dvb_frontend *fe,
91                                  enum fe_sec_tone_mode tone)
92 {
93         return 0;
94 }
95
96 static int dvb_dummy_fe_set_voltage(struct dvb_frontend *fe,
97                                     enum fe_sec_voltage voltage)
98 {
99         return 0;
100 }
101
102 static void dvb_dummy_fe_release(struct dvb_frontend* fe)
103 {
104         struct dvb_dummy_fe_state* state = fe->demodulator_priv;
105         kfree(state);
106 }
107
108 static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
109
110 struct dvb_frontend* dvb_dummy_fe_ofdm_attach(void)
111 {
112         struct dvb_dummy_fe_state* state = NULL;
113
114         /* allocate memory for the internal state */
115         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
116         if (!state)
117                 return NULL;
118
119         /* create dvb_frontend */
120         memcpy(&state->frontend.ops, &dvb_dummy_fe_ofdm_ops, sizeof(struct dvb_frontend_ops));
121         state->frontend.demodulator_priv = state;
122         return &state->frontend;
123 }
124
125 static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
126
127 struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
128 {
129         struct dvb_dummy_fe_state* state = NULL;
130
131         /* allocate memory for the internal state */
132         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
133         if (!state)
134                 return NULL;
135
136         /* create dvb_frontend */
137         memcpy(&state->frontend.ops, &dvb_dummy_fe_qpsk_ops, sizeof(struct dvb_frontend_ops));
138         state->frontend.demodulator_priv = state;
139         return &state->frontend;
140 }
141
142 static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
143
144 struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
145 {
146         struct dvb_dummy_fe_state* state = NULL;
147
148         /* allocate memory for the internal state */
149         state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
150         if (!state)
151                 return NULL;
152
153         /* create dvb_frontend */
154         memcpy(&state->frontend.ops, &dvb_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops));
155         state->frontend.demodulator_priv = state;
156         return &state->frontend;
157 }
158
159 static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
160         .delsys = { SYS_DVBT },
161         .info = {
162                 .name                   = "Dummy DVB-T",
163                 .frequency_min_hz       = 0,
164                 .frequency_max_hz       = 863250 * kHz,
165                 .frequency_stepsize_hz  = 62500,
166                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
167                                 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
168                                 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
169                                 FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
170                                 FE_CAN_TRANSMISSION_MODE_AUTO |
171                                 FE_CAN_GUARD_INTERVAL_AUTO |
172                                 FE_CAN_HIERARCHY_AUTO,
173         },
174
175         .release = dvb_dummy_fe_release,
176
177         .init = dvb_dummy_fe_init,
178         .sleep = dvb_dummy_fe_sleep,
179
180         .set_frontend = dvb_dummy_fe_set_frontend,
181         .get_frontend = dvb_dummy_fe_get_frontend,
182
183         .read_status = dvb_dummy_fe_read_status,
184         .read_ber = dvb_dummy_fe_read_ber,
185         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
186         .read_snr = dvb_dummy_fe_read_snr,
187         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
188 };
189
190 static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
191         .delsys = { SYS_DVBC_ANNEX_A },
192         .info = {
193                 .name                   = "Dummy DVB-C",
194                 .frequency_min_hz       =  51 * MHz,
195                 .frequency_max_hz       = 858 * MHz,
196                 .frequency_stepsize_hz  = 62500,
197                 .symbol_rate_min        = (57840000 / 2) / 64,  /* SACLK/64 == (XIN/2)/64 */
198                 .symbol_rate_max        = (57840000 / 2) / 4,   /* SACLK/4 */
199                 .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
200                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
201                         FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO
202         },
203
204         .release = dvb_dummy_fe_release,
205
206         .init = dvb_dummy_fe_init,
207         .sleep = dvb_dummy_fe_sleep,
208
209         .set_frontend = dvb_dummy_fe_set_frontend,
210         .get_frontend = dvb_dummy_fe_get_frontend,
211
212         .read_status = dvb_dummy_fe_read_status,
213         .read_ber = dvb_dummy_fe_read_ber,
214         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
215         .read_snr = dvb_dummy_fe_read_snr,
216         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
217 };
218
219 static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
220         .delsys = { SYS_DVBS },
221         .info = {
222                 .name                   = "Dummy DVB-S",
223                 .frequency_min_hz       =  950 * MHz,
224                 .frequency_max_hz       = 2150 * MHz,
225                 .frequency_stepsize_hz  = 250 * kHz,
226                 .frequency_tolerance_hz = 29500 * kHz,
227                 .symbol_rate_min        = 1000000,
228                 .symbol_rate_max        = 45000000,
229                 .caps = FE_CAN_INVERSION_AUTO |
230                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
231                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
232                         FE_CAN_QPSK
233         },
234
235         .release = dvb_dummy_fe_release,
236
237         .init = dvb_dummy_fe_init,
238         .sleep = dvb_dummy_fe_sleep,
239
240         .set_frontend = dvb_dummy_fe_set_frontend,
241         .get_frontend = dvb_dummy_fe_get_frontend,
242
243         .read_status = dvb_dummy_fe_read_status,
244         .read_ber = dvb_dummy_fe_read_ber,
245         .read_signal_strength = dvb_dummy_fe_read_signal_strength,
246         .read_snr = dvb_dummy_fe_read_snr,
247         .read_ucblocks = dvb_dummy_fe_read_ucblocks,
248
249         .set_voltage = dvb_dummy_fe_set_voltage,
250         .set_tone = dvb_dummy_fe_set_tone,
251 };
252
253 MODULE_DESCRIPTION("DVB DUMMY Frontend");
254 MODULE_AUTHOR("Emard");
255 MODULE_LICENSE("GPL");
256
257 EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
258 EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
259 EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);