- 根目录:
- drivers
- media
- dvb
- dvb-usb
- vp702x-fe.c
/* DVB frontend part of the Linux driver for the TwinhanDTV StarBox USB2.0
* DVB-S receiver.
*
* Copyright (C) 2005 Ralph Metzler <rjkm@metzlerbros.de>
* Metzler Brothers Systementwicklung GbR
*
* Copyright (C) 2005 Patrick Boettcher <patrick.boettcher@desy.de>
*
* Thanks to Twinhan who kindly provided hardware and information.
*
* This file can be removed soon, after the DST-driver is rewritten to provice
* the frontend-controlling separately.
*
* 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 "vp702x.h"
struct vp702x_fe_state {
struct dvb_frontend fe;
struct dvb_usb_device *d;
struct dvb_frontend_ops ops;
fe_sec_voltage_t voltage;
fe_sec_tone_mode_t tone_mode;
u8 lnb_buf[8];
u8 lock;
u8 sig;
u8 snr;
unsigned long next_status_check;
unsigned long status_check_interval;
};
static int vp702x_fe_refresh_state(struct vp702x_fe_state *st)
{
struct vp702x_device_state *dst = st->d->priv;
u8 *buf;
if (time_after(jiffies, st->next_status_check)) {
mutex_lock(&dst->buf_mutex);
buf = dst->buf;
vp702x_usb_in_op(st->d, READ_STATUS, 0, 0, buf, 10);
st->lock = buf[4];
vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x11, 0, buf, 1);
st->snr = buf[0];
vp702x_usb_in_op(st->d, READ_TUNER_REG_REQ, 0x15, 0, buf, 1);
st->sig = buf[0];
mutex_unlock(&dst->buf_mutex);
st->next_status_check = jiffies + (st->status_check_interval*HZ)/1000;
}
return 0;
}
static u8 vp702x_chksum(u8 *buf,int f, int count)
{
u8 s = 0;
int i;
for (i = f; i < f+count; i++)
s += buf[i];
return ~s+1;
}
static int vp702x_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
vp702x_fe_refresh_state(st);
deb_fe("%s\n",__func__);
if (st->lock == 0)
*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
else
*status = 0;
if (*status & FE_HAS_LOCK)
st->status_check_interval = 1000;
else
st->status_check_interval = 250;
return 0;
}
/* not supported by this Frontend */
static int vp702x_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
vp702x_fe_refresh_state(st);
*ber = 0;
return 0;
}
/* not supported by this Frontend */
static int vp702x_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
vp702x_fe_refresh_state(st);
*unc = 0;
return 0;
}
static int vp702x_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
vp702x_fe_refresh_state(st);
*strength = (st->sig << 8) | st->sig;
return 0;
}
static int vp702x_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
u8 _snr;
struct vp702x_fe_state *st = fe->demodulator_priv;
vp702x_fe_refresh_state(st);
_snr = (st->snr & 0x1f) * 0xff / 0x1f;
*snr = (_snr << 8) | _snr;
return 0;
}
static int vp702x_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
deb_fe("%s\n",__func__);
tune->min_delay_ms = 2000;
return 0;
}
static int vp702x_fe_set_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
struct vp702x_device_state *dst = st->d->priv;
u32 freq = fep->frequency/1000;
/*CalFrequency*/
/* u16 frequencyRef[16] = { 2, 4, 8, 16, 32, 64, 128, 256, 24, 5, 10, 20, 40, 80, 160, 320 }; */
u64 sr;
u8 *cmd;
mutex_lock(&dst->buf_mutex);
cmd = dst->buf;
memset(cmd, 0, 10);
cmd[0] = (freq >> 8) & 0x7f;
cmd[1] = freq & 0xff;
cmd[2] = 1; /* divrate == 4 -> frequencyRef[1] -> 1 here */
sr = (u64) (fep->u.qpsk.symbol_rate/1000) << 20;
do_div(sr,88000);
cmd[3] = (sr >> 12) & 0xff;
cmd[4] = (sr >> 4) & 0xff;
cmd[5] = (sr << 4) & 0xf0;
deb_fe("setting frontend to: %u -> %u (%x) LNB-based GHz, symbolrate: %d -> %lu (%lx)\n",
fep->frequency,freq,freq, fep->u.qpsk.symbol_rate,
(unsigned long) sr, (unsigned long) sr);
/* if (fep->inversion == INVERSION_ON)
cmd[6] |= 0x80; */
if (st->voltage == SEC_VOLTAGE_18)
cmd[6] |= 0x40;
/* if (fep->u.qpsk.symbol_rate > 8000000)
cmd[6] |= 0x20;
if (fep->frequency < 1531000)
cmd[6] |= 0x04;
if (st->tone_mode == SEC_TONE_ON)
cmd[6] |= 0x01;*/
cmd[7] = vp702x_chksum(cmd,0,7);
st->status_check_interval = 250;
st->next_status_check = jiffies;
vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
if (cmd[2] == 0 && cmd[3] == 0)
deb_fe("tuning failed.\n");
else
deb_fe("tuning succeeded.\n");
mutex_unlock(&dst->buf_mutex);
return 0;
}
static int vp702x_fe_init(struct dvb_frontend *fe)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
deb_fe("%s\n",__func__);
vp702x_usb_in_op(st->d, RESET_TUNER, 0, 0, NULL, 0);
return 0;
}
static int vp702x_fe_sleep(struct dvb_frontend *fe)
{
deb_fe("%s\n",__func__);
return 0;
}
static int vp702x_fe_get_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
deb_fe("%s\n",__func__);
return 0;
}
static int vp702x_fe_send_diseqc_msg (struct dvb_frontend* fe,
struct dvb_diseqc_master_cmd *m)
{
u8 *cmd;
struct vp702x_fe_state *st = fe->demodulator_priv;
struct vp702x_device_state *dst = st->d->priv;
deb_fe("%s\n",__func__);
if (m->msg_len > 4)
return -EINVAL;
mutex_lock(&dst->buf_mutex);
cmd = dst->buf;
cmd[1] = SET_DISEQC_CMD;
cmd[2] = m->msg_len;
memcpy(&cmd[3], m->msg, m->msg_len);
cmd[7] = vp702x_chksum(cmd, 0, 7);
vp702x_usb_inout_op(st->d, cmd, 8, cmd, 10, 100);
if (cmd[2] == 0 && cmd[3] == 0)
deb_fe("diseqc cmd failed.\n");
else
deb_fe("diseqc cmd succeeded.\n");
mutex_unlock(&dst->buf_mutex);
return 0;
}
static int vp702x_fe_send_diseqc_burst (struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
{
deb_fe("%s\n",__func__);
return 0;
}
static int vp702x_fe_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
struct vp702x_device_state *dst = st->d->priv;
u8 *buf;
deb_fe("%s\n",__func__);
st->tone_mode = tone;
if (tone == SEC_TONE_ON)
st->lnb_buf[2] = 0x02;
else
st->lnb_buf[2] = 0x00;
st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
mutex_lock(&dst->buf_mutex);
buf = dst->buf;
memcpy(buf, st->lnb_buf, 8);
vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
if (buf[2] == 0 && buf[3] == 0)
deb_fe("set_tone cmd failed.\n");
else
deb_fe("set_tone cmd succeeded.\n");
mutex_unlock(&dst->buf_mutex);
return 0;
}
static int vp702x_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t
voltage)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
struct vp702x_device_state *dst = st->d->priv;
u8 *buf;
deb_fe("%s\n",__func__);
st->voltage = voltage;
if (voltage != SEC_VOLTAGE_OFF)
st->lnb_buf[4] = 0x01;
else
st->lnb_buf[4] = 0x00;
st->lnb_buf[7] = vp702x_chksum(st->lnb_buf, 0, 7);
mutex_lock(&dst->buf_mutex);
buf = dst->buf;
memcpy(buf, st->lnb_buf, 8);
vp702x_usb_inout_op(st->d, buf, 8, buf, 10, 100);
if (buf[2] == 0 && buf[3] == 0)
deb_fe("set_voltage cmd failed.\n");
else
deb_fe("set_voltage cmd succeeded.\n");
mutex_unlock(&dst->buf_mutex);
return 0;
}
static void vp702x_fe_release(struct dvb_frontend* fe)
{
struct vp702x_fe_state *st = fe->demodulator_priv;
kfree(st);
}
static struct dvb_frontend_ops vp702x_fe_ops;
struct dvb_frontend * vp702x_fe_attach(struct dvb_usb_device *d)
{
struct vp702x_fe_state *s = kzalloc(sizeof(struct vp702x_fe_state), GFP_KERNEL);
if (s == NULL)
goto error;
s->d = d;
memcpy(&s->fe.ops,&vp702x_fe_ops,sizeof(struct dvb_frontend_ops));
s->fe.demodulator_priv = s;
s->lnb_buf[1] = SET_LNB_POWER;
s->lnb_buf[3] = 0xff; /* 0=tone burst, 2=data burst, ff=off */
return &s->fe;
error:
return NULL;
}
static struct dvb_frontend_ops vp702x_fe_ops = {
.info = {
.name = "Twinhan DST-like frontend (VP7021/VP7020) DVB-S",
.type = FE_QPSK,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 1000, /* kHz for QPSK frontends */
.frequency_tolerance = 0,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
.symbol_rate_tolerance = 500, /* ppm */
.caps = 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_QPSK |
FE_CAN_FEC_AUTO
},
.release = vp702x_fe_release,
.init = vp702x_fe_init,
.sleep = vp702x_fe_sleep,
.set_frontend = vp702x_fe_set_frontend,
.get_frontend = vp702x_fe_get_frontend,
.get_tune_settings = vp702x_fe_get_tune_settings,
.read_status = vp702x_fe_read_status,
.read_ber = vp702x_fe_read_ber,
.read_signal_strength = vp702x_fe_read_signal_strength,
.read_snr = vp702x_fe_read_snr,
.read_ucblocks = vp702x_fe_read_unc_blocks,
.diseqc_send_master_cmd = vp702x_fe_send_diseqc_msg,
.diseqc_send_burst = vp702x_fe_send_diseqc_burst,
.set_tone = vp702x_fe_set_tone,
.set_voltage = vp702x_fe_set_voltage,
};