mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 10:17:48 +07:00
7e3e68bcfd
Instead of using the DTV properties cache directly, pass the get frontend data as an argument. For now, everything should remain the same, but the next patch will prevent get_frontend to affect the global cache. This is needed because several drivers don't care enough to only change the properties if locked. Due to that, calling G_PROPERTY before locking on those drivers will make them to never lock. Ok, those drivers are crap and should never be merged like that, but the core should not rely that the drivers would be doing the right thing. Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
213 lines
5.2 KiB
C
213 lines
5.2 KiB
C
/* Frontend part of the Linux driver for the WideView/ Yakumo/ Hama/
|
|
* Typhoon/ Yuan DVB-T USB2.0 receiver.
|
|
*
|
|
* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@posteo.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation, version 2.
|
|
*
|
|
* see Documentation/dvb/README.dvb-usb for more information
|
|
*/
|
|
#include "dtt200u.h"
|
|
|
|
struct dtt200u_fe_state {
|
|
struct dvb_usb_device *d;
|
|
|
|
enum fe_status stat;
|
|
|
|
struct dtv_frontend_properties fep;
|
|
struct dvb_frontend frontend;
|
|
};
|
|
|
|
static int dtt200u_fe_read_status(struct dvb_frontend *fe,
|
|
enum fe_status *stat)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
u8 st = GET_TUNE_STATUS, b[3];
|
|
|
|
dvb_usb_generic_rw(state->d,&st,1,b,3,0);
|
|
|
|
switch (b[0]) {
|
|
case 0x01:
|
|
*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER |
|
|
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
|
|
break;
|
|
case 0x00: /* pending */
|
|
*stat = FE_TIMEDOUT; /* during set_frontend */
|
|
break;
|
|
default:
|
|
case 0x02: /* failed */
|
|
*stat = 0;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
u8 bw = GET_VIT_ERR_CNT,b[3];
|
|
dvb_usb_generic_rw(state->d,&bw,1,b,3,0);
|
|
*ber = (b[0] << 16) | (b[1] << 8) | b[2];
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
u8 bw = GET_RS_UNCOR_BLK_CNT,b[2];
|
|
|
|
dvb_usb_generic_rw(state->d,&bw,1,b,2,0);
|
|
*unc = (b[0] << 8) | b[1];
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
u8 bw = GET_AGC, b;
|
|
dvb_usb_generic_rw(state->d,&bw,1,&b,1,0);
|
|
*strength = (b << 8) | b;
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
u8 bw = GET_SNR,br;
|
|
dvb_usb_generic_rw(state->d,&bw,1,&br,1,0);
|
|
*snr = ~((br << 8) | br);
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_init(struct dvb_frontend* fe)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
u8 b = SET_INIT;
|
|
return dvb_usb_generic_write(state->d,&b,1);
|
|
}
|
|
|
|
static int dtt200u_fe_sleep(struct dvb_frontend* fe)
|
|
{
|
|
return dtt200u_fe_init(fe);
|
|
}
|
|
|
|
static int dtt200u_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
|
|
{
|
|
tune->min_delay_ms = 1500;
|
|
tune->step_size = 0;
|
|
tune->max_drift = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_set_frontend(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
int i;
|
|
enum fe_status st;
|
|
u16 freq = fep->frequency / 250000;
|
|
u8 bwbuf[2] = { SET_BANDWIDTH, 0 },freqbuf[3] = { SET_RF_FREQ, 0, 0 };
|
|
|
|
switch (fep->bandwidth_hz) {
|
|
case 8000000:
|
|
bwbuf[1] = 8;
|
|
break;
|
|
case 7000000:
|
|
bwbuf[1] = 7;
|
|
break;
|
|
case 6000000:
|
|
bwbuf[1] = 6;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
dvb_usb_generic_write(state->d,bwbuf,2);
|
|
|
|
freqbuf[1] = freq & 0xff;
|
|
freqbuf[2] = (freq >> 8) & 0xff;
|
|
dvb_usb_generic_write(state->d,freqbuf,3);
|
|
|
|
for (i = 0; i < 30; i++) {
|
|
msleep(20);
|
|
dtt200u_fe_read_status(fe, &st);
|
|
if (st & FE_TIMEDOUT)
|
|
continue;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dtt200u_fe_get_frontend(struct dvb_frontend* fe,
|
|
struct dtv_frontend_properties *fep)
|
|
{
|
|
struct dtt200u_fe_state *state = fe->demodulator_priv;
|
|
|
|
memcpy(fep, &state->fep, sizeof(struct dtv_frontend_properties));
|
|
return 0;
|
|
}
|
|
|
|
static void dtt200u_fe_release(struct dvb_frontend* fe)
|
|
{
|
|
struct dtt200u_fe_state *state = (struct dtt200u_fe_state*) fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static struct dvb_frontend_ops dtt200u_fe_ops;
|
|
|
|
struct dvb_frontend* dtt200u_fe_attach(struct dvb_usb_device *d)
|
|
{
|
|
struct dtt200u_fe_state* state = NULL;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct dtt200u_fe_state), GFP_KERNEL);
|
|
if (state == NULL)
|
|
goto error;
|
|
|
|
deb_info("attaching frontend dtt200u\n");
|
|
|
|
state->d = d;
|
|
|
|
memcpy(&state->frontend.ops,&dtt200u_fe_ops,sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
|
|
return &state->frontend;
|
|
error:
|
|
return NULL;
|
|
}
|
|
|
|
static struct dvb_frontend_ops dtt200u_fe_ops = {
|
|
.delsys = { SYS_DVBT },
|
|
.info = {
|
|
.name = "WideView USB DVB-T",
|
|
.frequency_min = 44250000,
|
|
.frequency_max = 867250000,
|
|
.frequency_stepsize = 250000,
|
|
.caps = FE_CAN_INVERSION_AUTO |
|
|
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
|
|
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
|
|
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
|
|
FE_CAN_TRANSMISSION_MODE_AUTO |
|
|
FE_CAN_GUARD_INTERVAL_AUTO |
|
|
FE_CAN_RECOVER |
|
|
FE_CAN_HIERARCHY_AUTO,
|
|
},
|
|
|
|
.release = dtt200u_fe_release,
|
|
|
|
.init = dtt200u_fe_init,
|
|
.sleep = dtt200u_fe_sleep,
|
|
|
|
.set_frontend = dtt200u_fe_set_frontend,
|
|
.get_frontend = dtt200u_fe_get_frontend,
|
|
.get_tune_settings = dtt200u_fe_get_tune_settings,
|
|
|
|
.read_status = dtt200u_fe_read_status,
|
|
.read_ber = dtt200u_fe_read_ber,
|
|
.read_signal_strength = dtt200u_fe_read_signal_strength,
|
|
.read_snr = dtt200u_fe_read_snr,
|
|
.read_ucblocks = dtt200u_fe_read_unc_blocks,
|
|
};
|