// SPDX-License-Identifier: GPL-2.0-or-later /* * Driver for Dummy Frontend * * Written by Emard <emard@softhome.net> */ #include <linux/module.h> #include <linux/init.h> #include <linux/string.h> #include <linux/slab.h> #include <media/dvb_frontend.h> #include "ddbridge-dummy-fe.h" struct ddbridge_dummy_fe_state { struct dvb_frontend frontend; }; static int ddbridge_dummy_fe_read_status(struct dvb_frontend *fe, enum fe_status *status) { *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK; return 0; } static int ddbridge_dummy_fe_read_ber(struct dvb_frontend *fe, u32 *ber) { *ber = 0; return 0; } static int ddbridge_dummy_fe_read_signal_strength(struct dvb_frontend *fe, u16 *strength) { *strength = 0; return 0; } static int ddbridge_dummy_fe_read_snr(struct dvb_frontend *fe, u16 *snr) { *snr = 0; return 0; } static int ddbridge_dummy_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) { *ucblocks = 0; return 0; } /* * Should only be implemented if it actually reads something from the hardware. * Also, it should check for the locks, in order to avoid report wrong data * to userspace. */ static int ddbridge_dummy_fe_get_frontend(struct dvb_frontend *fe, struct dtv_frontend_properties *p) { return 0; } static int ddbridge_dummy_fe_set_frontend(struct dvb_frontend *fe) { if (fe->ops.tuner_ops.set_params) { fe->ops.tuner_ops.set_params(fe); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } return 0; } static int ddbridge_dummy_fe_sleep(struct dvb_frontend *fe) { return 0; } static int ddbridge_dummy_fe_init(struct dvb_frontend *fe) { return 0; } static void ddbridge_dummy_fe_release(struct dvb_frontend *fe) { struct ddbridge_dummy_fe_state *state = fe->demodulator_priv; kfree(state); } static const struct dvb_frontend_ops ddbridge_dummy_fe_qam_ops; struct dvb_frontend *ddbridge_dummy_fe_qam_attach(void) { struct ddbridge_dummy_fe_state *state = NULL; /* allocate memory for the internal state */ state = kzalloc(sizeof(struct ddbridge_dummy_fe_state), GFP_KERNEL); if (!state) return NULL; /* create dvb_frontend */ memcpy(&state->frontend.ops, &ddbridge_dummy_fe_qam_ops, sizeof(struct dvb_frontend_ops)); state->frontend.demodulator_priv = state; return &state->frontend; } EXPORT_SYMBOL(ddbridge_dummy_fe_qam_attach); static const struct dvb_frontend_ops ddbridge_dummy_fe_qam_ops = { .delsys = { SYS_DVBC_ANNEX_A }, .info = { .name = "ddbridge dummy DVB-C", .frequency_min_hz = 51 * MHz, .frequency_max_hz = 858 * MHz, .frequency_stepsize_hz = 62500, /* symbol_rate_min: SACLK/64 == (XIN/2)/64 */ .symbol_rate_min = (57840000 / 2) / 64, .symbol_rate_max = (57840000 / 2) / 4, /* SACLK/4 */ .caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 | FE_CAN_QAM_128 | FE_CAN_QAM_256 | FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO }, .release = ddbridge_dummy_fe_release, .init = ddbridge_dummy_fe_init, .sleep = ddbridge_dummy_fe_sleep, .set_frontend = ddbridge_dummy_fe_set_frontend, .get_frontend = ddbridge_dummy_fe_get_frontend, .read_status = ddbridge_dummy_fe_read_status, .read_ber = ddbridge_dummy_fe_read_ber, .read_signal_strength = ddbridge_dummy_fe_read_signal_strength, .read_snr = ddbridge_dummy_fe_read_snr, .read_ucblocks = ddbridge_dummy_fe_read_ucblocks, }; MODULE_DESCRIPTION("ddbridge dummy Frontend"); MODULE_AUTHOR("Emard"); MODULE_LICENSE("GPL");