diff options
Diffstat (limited to 'drivers/media/pci/ddbridge/ddbridge-dummy-fe.c')
| -rw-r--r-- | drivers/media/pci/ddbridge/ddbridge-dummy-fe.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-dummy-fe.c b/drivers/media/pci/ddbridge/ddbridge-dummy-fe.c new file mode 100644 index 000000000..520ebd16b --- /dev/null +++ b/drivers/media/pci/ddbridge/ddbridge-dummy-fe.c @@ -0,0 +1,153 @@ +// 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_GPL(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"); |