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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for Dummy Frontend4 *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 17struct dvb_dummy_fe_state {18 struct dvb_frontend frontend;19};20 21 22static int dvb_dummy_fe_read_status(struct dvb_frontend *fe,23 enum fe_status *status)24{25 *status = FE_HAS_SIGNAL26 | FE_HAS_CARRIER27 | FE_HAS_VITERBI28 | FE_HAS_SYNC29 | FE_HAS_LOCK;30 31 return 0;32}33 34static int dvb_dummy_fe_read_ber(struct dvb_frontend *fe, u32 *ber)35{36 *ber = 0;37 return 0;38}39 40static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend *fe,41 u16 *strength)42{43 *strength = 0;44 return 0;45}46 47static int dvb_dummy_fe_read_snr(struct dvb_frontend *fe, u16 *snr)48{49 *snr = 0;50 return 0;51}52 53static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)54{55 *ucblocks = 0;56 return 0;57}58 59/*60 * Should only be implemented if it actually reads something from the hardware.61 * Also, it should check for the locks, in order to avoid report wrong data62 * to userspace.63 */64static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe,65 struct dtv_frontend_properties *p)66{67 return 0;68}69 70static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)71{72 if (fe->ops.tuner_ops.set_params) {73 fe->ops.tuner_ops.set_params(fe);74 if (fe->ops.i2c_gate_ctrl)75 fe->ops.i2c_gate_ctrl(fe, 0);76 }77 78 return 0;79}80 81static int dvb_dummy_fe_sleep(struct dvb_frontend *fe)82{83 return 0;84}85 86static int dvb_dummy_fe_init(struct dvb_frontend *fe)87{88 return 0;89}90 91static int dvb_dummy_fe_set_tone(struct dvb_frontend *fe,92 enum fe_sec_tone_mode tone)93{94 return 0;95}96 97static int dvb_dummy_fe_set_voltage(struct dvb_frontend *fe,98 enum fe_sec_voltage voltage)99{100 return 0;101}102 103static void dvb_dummy_fe_release(struct dvb_frontend *fe)104{105 struct dvb_dummy_fe_state *state = fe->demodulator_priv;106 107 kfree(state);108}109 110static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;111 112struct dvb_frontend *dvb_dummy_fe_ofdm_attach(void)113{114 struct dvb_dummy_fe_state *state = NULL;115 116 /* allocate memory for the internal state */117 state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);118 if (!state)119 return NULL;120 121 /* create dvb_frontend */122 memcpy(&state->frontend.ops,123 &dvb_dummy_fe_ofdm_ops,124 sizeof(struct dvb_frontend_ops));125 126 state->frontend.demodulator_priv = state;127 return &state->frontend;128}129EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);130 131static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;132 133struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)134{135 struct dvb_dummy_fe_state *state = NULL;136 137 /* allocate memory for the internal state */138 state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);139 if (!state)140 return NULL;141 142 /* create dvb_frontend */143 memcpy(&state->frontend.ops,144 &dvb_dummy_fe_qpsk_ops,145 sizeof(struct dvb_frontend_ops));146 147 state->frontend.demodulator_priv = state;148 return &state->frontend;149}150EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);151 152static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops;153 154struct dvb_frontend *dvb_dummy_fe_qam_attach(void)155{156 struct dvb_dummy_fe_state *state = NULL;157 158 /* allocate memory for the internal state */159 state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);160 if (!state)161 return NULL;162 163 /* create dvb_frontend */164 memcpy(&state->frontend.ops,165 &dvb_dummy_fe_qam_ops,166 sizeof(struct dvb_frontend_ops));167 168 state->frontend.demodulator_priv = state;169 return &state->frontend;170}171EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);172 173static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {174 .delsys = { SYS_DVBT },175 .info = {176 .name = "Dummy DVB-T",177 .frequency_min_hz = 0,178 .frequency_max_hz = 863250 * kHz,179 .frequency_stepsize_hz = 62500,180 .caps = FE_CAN_FEC_1_2 |181 FE_CAN_FEC_2_3 |182 FE_CAN_FEC_3_4 |183 FE_CAN_FEC_4_5 |184 FE_CAN_FEC_5_6 |185 FE_CAN_FEC_6_7 |186 FE_CAN_FEC_7_8 |187 FE_CAN_FEC_8_9 |188 FE_CAN_FEC_AUTO |189 FE_CAN_QAM_16 |190 FE_CAN_QAM_64 |191 FE_CAN_QAM_AUTO |192 FE_CAN_TRANSMISSION_MODE_AUTO |193 FE_CAN_GUARD_INTERVAL_AUTO |194 FE_CAN_HIERARCHY_AUTO,195 },196 197 .release = dvb_dummy_fe_release,198 199 .init = dvb_dummy_fe_init,200 .sleep = dvb_dummy_fe_sleep,201 202 .set_frontend = dvb_dummy_fe_set_frontend,203 .get_frontend = dvb_dummy_fe_get_frontend,204 205 .read_status = dvb_dummy_fe_read_status,206 .read_ber = dvb_dummy_fe_read_ber,207 .read_signal_strength = dvb_dummy_fe_read_signal_strength,208 .read_snr = dvb_dummy_fe_read_snr,209 .read_ucblocks = dvb_dummy_fe_read_ucblocks,210};211 212static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {213 .delsys = { SYS_DVBC_ANNEX_A },214 .info = {215 .name = "Dummy DVB-C",216 .frequency_min_hz = 51 * MHz,217 .frequency_max_hz = 858 * MHz,218 .frequency_stepsize_hz = 62500,219 /* symbol_rate_min: SACLK/64 == (XIN/2)/64 */220 .symbol_rate_min = (57840000 / 2) / 64,221 .symbol_rate_max = (57840000 / 2) / 4, /* SACLK/4 */222 .caps = FE_CAN_QAM_16 |223 FE_CAN_QAM_32 |224 FE_CAN_QAM_64 |225 FE_CAN_QAM_128 |226 FE_CAN_QAM_256 |227 FE_CAN_FEC_AUTO |228 FE_CAN_INVERSION_AUTO229 },230 231 .release = dvb_dummy_fe_release,232 233 .init = dvb_dummy_fe_init,234 .sleep = dvb_dummy_fe_sleep,235 236 .set_frontend = dvb_dummy_fe_set_frontend,237 .get_frontend = dvb_dummy_fe_get_frontend,238 239 .read_status = dvb_dummy_fe_read_status,240 .read_ber = dvb_dummy_fe_read_ber,241 .read_signal_strength = dvb_dummy_fe_read_signal_strength,242 .read_snr = dvb_dummy_fe_read_snr,243 .read_ucblocks = dvb_dummy_fe_read_ucblocks,244};245 246static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {247 .delsys = { SYS_DVBS },248 .info = {249 .name = "Dummy DVB-S",250 .frequency_min_hz = 950 * MHz,251 .frequency_max_hz = 2150 * MHz,252 .frequency_stepsize_hz = 250 * kHz,253 .frequency_tolerance_hz = 29500 * kHz,254 .symbol_rate_min = 1000000,255 .symbol_rate_max = 45000000,256 .caps = FE_CAN_INVERSION_AUTO |257 FE_CAN_FEC_1_2 |258 FE_CAN_FEC_2_3 |259 FE_CAN_FEC_3_4 |260 FE_CAN_FEC_5_6 |261 FE_CAN_FEC_7_8 |262 FE_CAN_FEC_AUTO |263 FE_CAN_QPSK264 },265 266 .release = dvb_dummy_fe_release,267 268 .init = dvb_dummy_fe_init,269 .sleep = dvb_dummy_fe_sleep,270 271 .set_frontend = dvb_dummy_fe_set_frontend,272 .get_frontend = dvb_dummy_fe_get_frontend,273 274 .read_status = dvb_dummy_fe_read_status,275 .read_ber = dvb_dummy_fe_read_ber,276 .read_signal_strength = dvb_dummy_fe_read_signal_strength,277 .read_snr = dvb_dummy_fe_read_snr,278 .read_ucblocks = dvb_dummy_fe_read_ucblocks,279 280 .set_voltage = dvb_dummy_fe_set_voltage,281 .set_tone = dvb_dummy_fe_set_tone,282};283 284MODULE_DESCRIPTION("DVB DUMMY Frontend");285MODULE_AUTHOR("Emard");286MODULE_LICENSE("GPL");287