media: ddbridge: copy the dvb_dummy_fe driver to ddbridge
As we'll be transforming the dvb-dummy-fe driver soon into a virtual driver, let's first copy the existing one to ddbridge as-is, as it is needed there. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab
Родитель
6a79117187
Коммит
3a137f81f7
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for Dummy Frontend
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*
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* Written by Emard <emard@softhome.net>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <media/dvb_frontend.h>
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#include "dvb_dummy_fe.h"
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struct dvb_dummy_fe_state {
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struct dvb_frontend frontend;
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};
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static int dvb_dummy_fe_read_status(struct dvb_frontend *fe,
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enum fe_status *status)
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{
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*status = FE_HAS_SIGNAL
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| FE_HAS_CARRIER
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| FE_HAS_VITERBI
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| FE_HAS_SYNC
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| FE_HAS_LOCK;
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return 0;
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}
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static int dvb_dummy_fe_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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*ber = 0;
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return 0;
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}
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static int dvb_dummy_fe_read_signal_strength(struct dvb_frontend *fe,
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u16 *strength)
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{
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*strength = 0;
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return 0;
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}
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static int dvb_dummy_fe_read_snr(struct dvb_frontend *fe, u16 *snr)
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{
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*snr = 0;
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return 0;
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}
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static int dvb_dummy_fe_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
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{
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*ucblocks = 0;
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return 0;
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}
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/*
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* Should only be implemented if it actually reads something from the hardware.
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* Also, it should check for the locks, in order to avoid report wrong data
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* to userspace.
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*/
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static int dvb_dummy_fe_get_frontend(struct dvb_frontend *fe,
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struct dtv_frontend_properties *p)
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{
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return 0;
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}
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static int dvb_dummy_fe_set_frontend(struct dvb_frontend *fe)
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{
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if (fe->ops.tuner_ops.set_params) {
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fe->ops.tuner_ops.set_params(fe);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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}
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return 0;
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}
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static int dvb_dummy_fe_sleep(struct dvb_frontend *fe)
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{
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return 0;
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}
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static int dvb_dummy_fe_init(struct dvb_frontend *fe)
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{
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return 0;
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}
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static int dvb_dummy_fe_set_tone(struct dvb_frontend *fe,
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enum fe_sec_tone_mode tone)
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{
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return 0;
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}
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static int dvb_dummy_fe_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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return 0;
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}
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static void dvb_dummy_fe_release(struct dvb_frontend *fe)
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{
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struct dvb_dummy_fe_state *state = fe->demodulator_priv;
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kfree(state);
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}
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static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops;
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struct dvb_frontend *dvb_dummy_fe_ofdm_attach(void)
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{
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struct dvb_dummy_fe_state *state = NULL;
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/* allocate memory for the internal state */
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state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
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if (!state)
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return NULL;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops,
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&dvb_dummy_fe_ofdm_ops,
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sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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}
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EXPORT_SYMBOL(dvb_dummy_fe_ofdm_attach);
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static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops;
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struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
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{
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struct dvb_dummy_fe_state *state = NULL;
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/* allocate memory for the internal state */
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state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
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if (!state)
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return NULL;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops,
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&dvb_dummy_fe_qpsk_ops,
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sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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}
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EXPORT_SYMBOL(dvb_dummy_fe_qpsk_attach);
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static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops;
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struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
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{
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struct dvb_dummy_fe_state *state = NULL;
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/* allocate memory for the internal state */
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state = kzalloc(sizeof(struct dvb_dummy_fe_state), GFP_KERNEL);
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if (!state)
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return NULL;
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/* create dvb_frontend */
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memcpy(&state->frontend.ops,
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&dvb_dummy_fe_qam_ops,
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sizeof(struct dvb_frontend_ops));
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state->frontend.demodulator_priv = state;
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return &state->frontend;
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}
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EXPORT_SYMBOL(dvb_dummy_fe_qam_attach);
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static const struct dvb_frontend_ops dvb_dummy_fe_ofdm_ops = {
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.delsys = { SYS_DVBT },
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.info = {
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.name = "Dummy DVB-T",
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.frequency_min_hz = 0,
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.frequency_max_hz = 863250 * kHz,
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.frequency_stepsize_hz = 62500,
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.caps = FE_CAN_FEC_1_2 |
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FE_CAN_FEC_2_3 |
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FE_CAN_FEC_3_4 |
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FE_CAN_FEC_4_5 |
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FE_CAN_FEC_5_6 |
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FE_CAN_FEC_6_7 |
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FE_CAN_FEC_7_8 |
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FE_CAN_FEC_8_9 |
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FE_CAN_FEC_AUTO |
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FE_CAN_QAM_16 |
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FE_CAN_QAM_64 |
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FE_CAN_QAM_AUTO |
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FE_CAN_TRANSMISSION_MODE_AUTO |
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FE_CAN_GUARD_INTERVAL_AUTO |
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FE_CAN_HIERARCHY_AUTO,
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},
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.release = dvb_dummy_fe_release,
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.init = dvb_dummy_fe_init,
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.sleep = dvb_dummy_fe_sleep,
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.set_frontend = dvb_dummy_fe_set_frontend,
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.get_frontend = dvb_dummy_fe_get_frontend,
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.read_status = dvb_dummy_fe_read_status,
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.read_ber = dvb_dummy_fe_read_ber,
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.read_signal_strength = dvb_dummy_fe_read_signal_strength,
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.read_snr = dvb_dummy_fe_read_snr,
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.read_ucblocks = dvb_dummy_fe_read_ucblocks,
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};
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static const struct dvb_frontend_ops dvb_dummy_fe_qam_ops = {
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.delsys = { SYS_DVBC_ANNEX_A },
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.info = {
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.name = "Dummy DVB-C",
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.frequency_min_hz = 51 * MHz,
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.frequency_max_hz = 858 * MHz,
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.frequency_stepsize_hz = 62500,
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/* symbol_rate_min: SACLK/64 == (XIN/2)/64 */
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.symbol_rate_min = (57840000 / 2) / 64,
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.symbol_rate_max = (57840000 / 2) / 4, /* SACLK/4 */
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.caps = FE_CAN_QAM_16 |
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FE_CAN_QAM_32 |
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FE_CAN_QAM_64 |
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FE_CAN_QAM_128 |
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FE_CAN_QAM_256 |
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FE_CAN_FEC_AUTO |
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FE_CAN_INVERSION_AUTO
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},
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.release = dvb_dummy_fe_release,
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.init = dvb_dummy_fe_init,
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.sleep = dvb_dummy_fe_sleep,
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.set_frontend = dvb_dummy_fe_set_frontend,
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.get_frontend = dvb_dummy_fe_get_frontend,
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.read_status = dvb_dummy_fe_read_status,
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.read_ber = dvb_dummy_fe_read_ber,
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.read_signal_strength = dvb_dummy_fe_read_signal_strength,
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.read_snr = dvb_dummy_fe_read_snr,
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.read_ucblocks = dvb_dummy_fe_read_ucblocks,
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};
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static const struct dvb_frontend_ops dvb_dummy_fe_qpsk_ops = {
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.delsys = { SYS_DVBS },
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.info = {
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.name = "Dummy DVB-S",
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.frequency_min_hz = 950 * MHz,
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.frequency_max_hz = 2150 * MHz,
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.frequency_stepsize_hz = 250 * kHz,
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.frequency_tolerance_hz = 29500 * kHz,
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.symbol_rate_min = 1000000,
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.symbol_rate_max = 45000000,
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.caps = FE_CAN_INVERSION_AUTO |
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FE_CAN_FEC_1_2 |
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FE_CAN_FEC_2_3 |
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FE_CAN_FEC_3_4 |
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FE_CAN_FEC_5_6 |
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FE_CAN_FEC_7_8 |
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FE_CAN_FEC_AUTO |
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FE_CAN_QPSK
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},
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.release = dvb_dummy_fe_release,
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.init = dvb_dummy_fe_init,
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.sleep = dvb_dummy_fe_sleep,
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.set_frontend = dvb_dummy_fe_set_frontend,
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.get_frontend = dvb_dummy_fe_get_frontend,
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.read_status = dvb_dummy_fe_read_status,
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.read_ber = dvb_dummy_fe_read_ber,
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.read_signal_strength = dvb_dummy_fe_read_signal_strength,
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.read_snr = dvb_dummy_fe_read_snr,
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.read_ucblocks = dvb_dummy_fe_read_ucblocks,
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.set_voltage = dvb_dummy_fe_set_voltage,
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.set_tone = dvb_dummy_fe_set_tone,
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};
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MODULE_DESCRIPTION("DVB DUMMY Frontend");
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MODULE_AUTHOR("Emard");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,36 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Driver for Dummy Frontend
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*
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* Written by Emard <emard@softhome.net>
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*/
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#ifndef DVB_DUMMY_FE_H
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#define DVB_DUMMY_FE_H
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#include <linux/dvb/frontend.h>
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#include <media/dvb_frontend.h>
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#if IS_REACHABLE(CONFIG_DVB_DUMMY_FE)
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struct dvb_frontend *dvb_dummy_fe_ofdm_attach(void);
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struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void);
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struct dvb_frontend *dvb_dummy_fe_qam_attach(void);
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#else
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static inline struct dvb_frontend *dvb_dummy_fe_ofdm_attach(void)
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{
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pr_warn("%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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static inline struct dvb_frontend *dvb_dummy_fe_qpsk_attach(void)
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{
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pr_warn("%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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static inline struct dvb_frontend *dvb_dummy_fe_qam_attach(void)
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{
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pr_warn("%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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#endif /* CONFIG_DVB_DUMMY_FE */
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#endif // DVB_DUMMY_FE_H
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