/* DVB USB compliant Linux driver for the
* - GENPIX 8pks/qpsk USB2.0 DVB-S module
*
* Copyright (C) 2006 Alan Nisota (alannisota@gmail.com)
*
* Thanks to GENPIX for the sample code used to implement this module.
*
* This module is based off the vp7045 and vp702x modules
*
* 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 "gp8psk.h"
struct gp8psk_fe_state {
struct dvb_frontend fe;
struct dvb_usb_device *d;
u16 snr;
unsigned long next_snr_check;
};
static int gp8psk_fe_read_status(struct dvb_frontend* fe, fe_status_t *status)
{
struct gp8psk_fe_state *st = fe->demodulator_priv;
u8 lock;
if (gp8psk_usb_in_op(st->d, GET_SIGNAL_LOCK, 0, 0, &lock,1))
return -EINVAL;
if (lock)
*status = FE_HAS_LOCK | FE_HAS_SYNC | FE_HAS_VITERBI | FE_HAS_SIGNAL | FE_HAS_CARRIER;
else
*status = 0;
return 0;
}
/* not supported by this Frontend */
static int gp8psk_fe_read_ber(struct dvb_frontend* fe, u32 *ber)
{
(void) fe;
*ber = 0;
return 0;
}
/* not supported by this Frontend */
static int gp8psk_fe_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
(void) fe;
*unc = 0;
return 0;
}
static int gp8psk_fe_read_snr(struct dvb_frontend* fe, u16 *snr)
{
struct gp8psk_fe_state *st = fe->demodulator_priv;
u8 buf[2];
if (time_after(jiffies,st->next_snr_check)) {
gp8psk_usb_in_op(st->d,GET_SIGNAL_STRENGTH,0,0,buf,2);
*snr = (int)(buf[1]) << 8 | buf[0];
/* snr is reported in dBu*256 */
/* snr / 38.4 ~= 100% strength */
/* snr * 17 returns 100% strength as 65535 */
if (*snr <= 3855)
*snr = (*snr<<4) + *snr; // snr * 17
else
*snr = 65535;
st->next_snr_check = jiffies + (10*HZ)/1000;
} else {
*snr = st->snr;
}
return 0;
}
static int gp8psk_fe_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
return gp8psk_fe_read_snr(fe, strength);
}
static int gp8psk_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 800;
return 0;
}
static int gp8psk_fe_set_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
struct gp8psk_fe_state *state = fe->demodulator_priv;
u8 cmd[10];
u32 freq = fep->frequency * 1000;
cmd[4] = freq & 0xff;
cmd[5] = (freq >> 8) & 0xff;
cmd[6] = (freq >> 16) & 0xff;
cmd[7] = (freq >> 24) & 0xff;
switch(fe->ops.info.type) {
case FE_QPSK:
cmd[0] = fep->u.qpsk.symbol_rate & 0xff;
cmd[1] = (fep->u.qpsk.symbol_rate >> 8) & 0xff;
cmd[2] = (fep->u.qpsk.symbol_rate >> 16) & 0xff;
cmd[3] = (fep->u.qpsk.symbol_rate >> 24) & 0xff;
cmd[8] = ADV_MOD_DVB_QPSK;
cmd[9] = 0x03; /*ADV_MOD_FEC_XXX*/
break;
default:
// other modes are unsuported right now
cmd[0] = 0;
cmd[1] = 0;
cmd[2] = 0;
cmd[3] = 0;
cmd[8] = 0;
cmd[9] = 0;
break;
}
gp8psk_usb_out_op(state->d,TUNE_8PSK,0,0,cmd,10);
state->next_snr_check = jiffies;
return 0;
}
static int gp8psk_fe_get_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
return 0;
}
static int gp8psk_fe_send_diseqc_msg (struct dvb_frontend* fe,
struct dvb_diseqc_master_cmd *m)
{
struct gp8psk_fe_state *st = fe->demodulator_priv;
deb_fe("%s\n",__FUNCTION__);
if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, m->msg[0], 0,
m->msg, m->msg_len)) {
return -EINVAL;
}
return 0;
}
static int gp8psk_fe_send_diseqc_burst (struct dvb_frontend* fe,
fe_sec_mini_cmd_t burst)
{
struct gp8psk_fe_state *st = fe->demodulator_priv;
u8 cmd;
deb_fe("%s\n",__FUNCTION__);
/* These commands are certainly wrong */
cmd = (burst == SEC_MINI_A) ? 0x00 : 0x01;
if (gp8psk_usb_out_op(st->d,SEND_DISEQC_COMMAND, cmd, 0,
&cmd, 0)) {
return -EINVAL;
}
return 0;
}
static int gp8psk_fe_set_tone (struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
struct gp8psk_fe_state* state = fe->demodulator_priv;
if (gp8psk_usb_out_op(state->d,SET_22KHZ_TONE,
(tone == SEC_TONE_ON), 0, NULL, 0)) {
return -EINVAL;
}
return 0;
}
static int gp8psk_fe_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
struct gp8psk_fe_state* state = fe->demodulator_priv;
if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE,
voltage == SEC_VOLTAGE_18, 0, NULL, 0)) {
return -EINVAL;
}
return 0;
}
static int gp8psk_fe_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long sw_cmd)
{
struct gp8psk_fe_state* state = fe->demodulator_priv;
u8 cmd = sw_cmd & 0x7f;
if (gp8psk_usb_out_op(state->d,SET_DN_SWITCH, cmd, 0,
NULL, 0)) {
return -EINVAL;
}
if (gp8psk_usb_out_op(state->d,SET_LNB_VOLTAGE, !!(sw_cmd & 0x80),
0, NULL, 0)) {
return -EINVAL;
}
return 0;
}
static void gp8psk_fe_release(struct dvb_frontend* fe)
{
struct gp8psk_fe_state *state = fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops gp8psk_fe_ops;
struct dvb_frontend * gp8psk_fe_attach(struct dvb_usb_device *d)
{
struct gp8psk_fe_state *s = kzalloc(sizeof(struct gp8psk_fe_state), GFP_KERNEL);
if (s == NULL)
goto error;
s->d = d;
memcpy(&s->fe.ops, &gp8psk_fe_ops, sizeof(struct dvb_frontend_ops));
s->fe.demodulator_priv = s;
goto success;
error:
return NULL;
success:
return &s->fe;
}
static struct dvb_frontend_ops gp8psk_fe_ops = {
.info = {
.name = "Genpix 8psk-USB DVB-S",
.type = FE_QPSK,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 100,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
.symbol_rate_tolerance = 500, /* ppm */
.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
},
.release = gp8psk_fe_release,
.init = NULL,
.sleep = NULL,
.set_frontend = gp8psk_fe_set_frontend,
.get_frontend = gp8psk_fe_get_frontend,
.get_tune_settings = gp8psk_fe_get_tune_settings,
.read_status = gp8psk_fe_read_status,
.read_ber = gp8psk_fe_read_ber,
.read_signal_strength = gp8psk_fe_read_signal_strength,
.read_snr = gp8psk_fe_read_snr,
.read_ucblocks = gp8psk_fe_read_unc_blocks,
.diseqc_send_master_cmd = gp8psk_fe_send_diseqc_msg,
.diseqc_send_burst = gp8psk_fe_send_diseqc_burst,
.set_tone = gp8psk_fe_set_tone,
.set_voltage = gp8psk_fe_set_voltage,
.dishnetwork_send_legacy_command = gp8psk_fe_send_legacy_dish_cmd,
};