/*
Driver for VES1893 and VES1993 QPSK Demodulators
Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
Copyright (C) 2001 Ronny Strutz <3des@elitedvb.de>
Copyright (C) 2002 Dennis Noermann <dennis.noermann@noernet.de>
Copyright (C) 2002-2003 Andreas Oberritter <obi@linuxtv.org>
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; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "dvb_frontend.h"
#include "ves1x93.h"
struct ves1x93_state {
struct i2c_adapter* i2c;
/* configuration settings */
const struct ves1x93_config* config;
struct dvb_frontend frontend;
/* previous uncorrected block counter */
fe_spectral_inversion_t inversion;
u8 *init_1x93_tab;
u8 *init_1x93_wtab;
u8 tab_size;
u8 demod_type;
u32 frequency;
};
static int debug;
#define dprintk if (debug) printk
#define DEMOD_VES1893 0
#define DEMOD_VES1993 1
static u8 init_1893_tab [] = {
0x01, 0xa4, 0x35, 0x80, 0x2a, 0x0b, 0x55, 0xc4,
0x09, 0x69, 0x00, 0x86, 0x4c, 0x28, 0x7f, 0x00,
0x00, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x80, 0x00, 0x21, 0xb0, 0x14, 0x00, 0xdc, 0x00,
0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x55, 0x00, 0x00, 0x7f, 0x00
};
static u8 init_1993_tab [] = {
0x00, 0x9c, 0x35, 0x80, 0x6a, 0x09, 0x72, 0x8c,
0x09, 0x6b, 0x00, 0x00, 0x4c, 0x08, 0x00, 0x00,
0x00, 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x80, 0x40, 0x21, 0xb0, 0x00, 0x00, 0x00, 0x10,
0x81, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00,
0x00, 0x55, 0x03, 0x00, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x0e, 0x80, 0x00
};
static u8 init_1893_wtab[] =
{
1,1,1,1,1,1,1,1, 1,1,0,0,1,1,0,0,
0,1,0,0,0,0,0,0, 1,0,1,1,0,0,0,1,
1,1,1,0,0,0,0,0, 0,0,1,1,0,0,0,0,
1,1,1,0,1,1
};
static u8 init_1993_wtab[] =
{
1,1,1,1,1,1,1,1, 1,1,0,0,1,1,0,0,
0,1,0,0,0,0,0,0, 1,1,1,1,0,0,0,1,
1,1,1,0,0,0,0,0, 0,0,1,1,0,0,0,0,
1,1,1,0,1,1,1,1, 1,1,1,1,1
};
static int ves1x93_writereg (struct ves1x93_state* state, u8 reg, u8 data)
{
u8 buf [] = { 0x00, reg, data };
struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 3 };
int err;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
dprintk ("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data);
return -EREMOTEIO;
}
return 0;
}
static u8 ves1x93_readreg (struct ves1x93_state* state, u8 reg)
{
int ret;
u8 b0 [] = { 0x00, reg };
u8 b1 [] = { 0 };
struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 2 },
{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
ret = i2c_transfer (state->i2c, msg, 2);
if (ret != 2) return ret;
return b1[0];
}
static int ves1x93_clr_bit (struct ves1x93_state* state)
{
msleep(10);
ves1x93_writereg (state, 0, state->init_1x93_tab[0] & 0xfe);
ves1x93_writereg (state, 0, state->init_1x93_tab[0]);
msleep(50);
return 0;
}
static int ves1x93_set_inversion (struct ves1x93_state* state, fe_spectral_inversion_t inversion)
{
u8 val;
/*
* inversion on/off are interchanged because i and q seem to
* be swapped on the hardware
*/
switch (inversion) {
case INVERSION_OFF:
val = 0xc0;
break;
case INVERSION_ON:
val = 0x80;
break;
case INVERSION_AUTO:
val = 0x00;
break;
default:
return -EINVAL;
}
return ves1x93_writereg (state, 0x0c, (state->init_1x93_tab[0x0c] & 0x3f) | val);
}
static int ves1x93_set_fec (struct ves1x93_state* state, fe_code_rate_t fec)
{
if (fec == FEC_AUTO)
return ves1x93_writereg (state, 0x0d, 0x08);
else if (fec < FEC_1_2 || fec > FEC_8_9)
return -EINVAL;
else
return ves1x93_writereg (state, 0x0d, fec - FEC_1_2);
}
static fe_code_rate_t ves1x93_get_fec (struct ves1x93_state* state)
{
return FEC_1_2 + ((ves1x93_readreg (state, 0x0d) >> 4) & 0x7);
}
static int ves1x93_set_symbolrate (struct ves1x93_state* state, u32 srate)
{
u32 BDR;
u32 ratio;
u8 ADCONF, FCONF, FNR, AGCR;
u32 BDRI;
u32 tmp;
u32 FIN;
dprintk("%s: srate == %d\n", __func__, (unsigned int) srate);
if (srate > state->config->xin/2)
srate = state->config->xin/2;
if (srate < 500000)
srate = 500000;
#define MUL (1UL<<26)
FIN = (state->config->xin + 6000) >> 4;
tmp = srate << 6;
ratio = tmp / FIN;
tmp = (tmp % FIN) << 8;
ratio = (ratio << 8) + tmp / FIN;
tmp = (tmp % FIN) << 8;
ratio = (ratio << 8) + tmp / FIN;
FNR = 0xff;
if (ratio < MUL/3) FNR = 0;
if (ratio < (MUL*11)/50) FNR = 1;
if (ratio < MUL/6) FNR = 2;
if (ratio < MUL/9) FNR = 3;
if (ratio < MUL/12) FNR = 4;
if (ratio < (MUL*11)/200) FNR = 5;
if (ratio < MUL/24) FNR = 6;
if (ratio < (MUL*27)/1000) FNR = 7;
if (ratio < MUL/48) FNR = 8;
if (ratio < (MUL*137)/10000) FNR = 9;
if (FNR == 0xff) {
ADCONF = 0x89;
FCONF = 0x80;
FNR = 0;
} else {
ADCONF = 0x81;
FCONF = 0x88 | (FNR >> 1) | ((FNR & 0x01) << 5);
/*FCONF = 0x80 | ((FNR & 0x01) << 5) | (((FNR > 1) & 0x03) << 3) | ((FNR >> 1) & 0x07);*/
}
BDR = (( (ratio << (FNR >> 1)) >> 4) + 1) >> 1;
BDRI = ( ((FIN << 8) / ((srate << (FNR >> 1)) >> 2)) + 1) >> 1;
dprintk("FNR= %d\n", FNR);
dprintk("ratio= %08x\n", (unsigned int) ratio);
dprintk("BDR= %08x\n", (unsigned int) BDR);
dprintk("BDRI= %02x\n", (unsigned int) BDRI);
if (BDRI > 0xff)
BDRI = 0xff;
ves1x93_writereg (state, 0x06, 0xff & BDR);
ves1x93_writereg (state, 0x07, 0xff & (BDR >> 8));
ves1x93_writereg (state, 0x08, 0x0f & (BDR >> 16));
ves1x93_writereg (state, 0x09, BDRI);
ves1x93_writereg (state, 0x20, ADCONF);
ves1x93_writereg (state, 0x21, FCONF);
AGCR = state->init_1x93_tab[0x05];
if (state->config->invert_pwm)
AGCR |= 0x20;
if (srate < 6000000)
AGCR |= 0x80;
else
AGCR &= ~0x80;
ves1x93_writereg (state, 0x05, AGCR);
/* ves1993 hates this, will lose lock */
if (state->demod_type != DEMOD_VES1993)
ves1x93_clr_bit (state);
return 0;
}
static int ves1x93_init (struct dvb_frontend* fe)
{
struct ves1x93_state* state = fe->demodulator_priv;
int i;
int val;
dprintk("%s: init chip\n", __func__);
for (i = 0; i < state->tab_size; i++) {
if (state->init_1x93_wtab[i]) {
val = state->init_1x93_tab[i];
if (state->config->invert_pwm && (i == 0x05)) val |= 0x20; /* invert PWM */
ves1x93_writereg (state, i, val);
}
}
return 0;
}
static int ves1x93_set_voltage (struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
struct ves1x93_state* state = fe->demodulator_priv;
switch (voltage) {
case SEC_VOLTAGE_13:
return ves1x93_writereg (state, 0x1f, 0x20);
case SEC_VOLTAGE_18:
return ves1x93_writereg (state, 0x1f, 0x30);
case SEC_VOLTAGE_OFF:
return ves1x93_writereg (state, 0x1f, 0x00);
default:
return -EINVAL;
}
}
static int ves1x93_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
struct ves1x93_state* state = fe->demodulator_priv;
u8 sync = ves1x93_readreg (state, 0x0e);
/*
* The ves1893 sometimes returns sync values that make no sense,
* because, e.g., the SIGNAL bit is 0, while some of the higher
* bits are 1 (and how can there be a CARRIER w/o a SIGNAL?).
* Tests showed that the VITERBI and SYNC bits are returned
* reliably, while the SIGNAL and CARRIER bits ar sometimes wrong.
* If such a case occurs, we read the value again, until we get a
* valid value.
*/
int maxtry = 10; /* just for safety - let's not get stuck here */
while ((sync & 0x03) != 0x03 && (sync & 0x0c) && maxtry--) {
msleep(10);
sync = ves1x93_readreg (state, 0x0e);
}
*status = 0;
if (sync & 1)
*status |= FE_HAS_SIGNAL;
if (sync & 2)
*status |= FE_HAS_CARRIER;
if (sync & 4)
*status |= FE_HAS_VITERBI;
if (sync & 8)
*status |= FE_HAS_SYNC;
if ((sync & 0x1f) == 0x1f)
*status |= FE_HAS_LOCK;
return 0;
}
static int ves1x93_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct ves1x93_state* state = fe->demodulator_priv;
*ber = ves1x93_readreg (state, 0x15);
*ber |= (ves1x93_readreg (state, 0x16) << 8);
*ber |= ((ves1x93_readreg (state, 0x17) & 0x0F) << 16);
*ber *= 10;
return 0;
}
static int ves1x93_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
struct ves1x93_state* state = fe->demodulator_priv;
u8 signal = ~ves1x93_readreg (state, 0x0b);
*strength = (signal << 8) | signal;
return 0;
}
static int ves1x93_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct ves1x93_state* state = fe->demodulator_priv;
u8 _snr = ~ves1x93_readreg (state, 0x1c);
*snr = (_snr << 8) | _snr;
return 0;
}
static int ves1x93_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
struct ves1x93_state* state = fe->demodulator_priv;
*ucblocks = ves1x93_readreg (state, 0x18) & 0x7f;
if (*ucblocks == 0x7f)
*ucblocks = 0xffffffff; /* counter overflow... */
ves1x93_writereg (state, 0x18, 0x00); /* reset the counter */
ves1x93_writereg (state, 0x18, 0x80); /* dto. */
return 0;
}
static int ves1x93_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct ves1x93_state* state = fe->demodulator_priv;
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);
}
ves1x93_set_inversion (state, p->inversion);
ves1x93_set_fec(state, p->fec_inner);
ves1x93_set_symbolrate(state, p->symbol_rate);
state->inversion = p->inversion;
state->frequency = p->frequency;
return 0;
}
static int ves1x93_get_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct ves1x93_state* state = fe->demodulator_priv;
int afc;
afc = ((int)((char)(ves1x93_readreg (state, 0x0a) << 1)))/2;
afc = (afc * (int)(p->symbol_rate/1000/8))/16;
p->frequency = state->frequency - afc;
/*
* inversion indicator is only valid
* if auto inversion was used
*/
if (state->inversion == INVERSION_AUTO)
p->inversion = (ves1x93_readreg (state, 0x0f) & 2) ?
INVERSION_OFF : INVERSION_ON;
p->fec_inner = ves1x93_get_fec(state);
/* XXX FIXME: timing offset !! */
return 0;
}
static int ves1x93_sleep(struct dvb_frontend* fe)
{
struct ves1x93_state* state = fe->demodulator_priv;
return ves1x93_writereg (state, 0x00, 0x08);
}
static void ves1x93_release(struct dvb_frontend* fe)
{
struct ves1x93_state* state = fe->demodulator_priv;
kfree(state);
}
static int ves1x93_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct ves1x93_state* state = fe->demodulator_priv;
if (enable) {
return ves1x93_writereg(state, 0x00, 0x11);
} else {
return ves1x93_writereg(state, 0x00, 0x01);
}
}
static struct dvb_frontend_ops ves1x93_ops;
struct dvb_frontend* ves1x93_attach(const struct ves1x93_config* config,
struct i2c_adapter* i2c)
{
struct ves1x93_state* state = NULL;
u8 identity;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct ves1x93_state), GFP_KERNEL);
if (state == NULL) goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->inversion = INVERSION_OFF;
/* check if the demod is there + identify it */
identity = ves1x93_readreg(state, 0x1e);
switch (identity) {
case 0xdc: /* VES1893A rev1 */
printk("ves1x93: Detected ves1893a rev1\n");
state->demod_type = DEMOD_VES1893;
state->init_1x93_tab = init_1893_tab;
state->init_1x93_wtab = init_1893_wtab;
state->tab_size = sizeof(init_1893_tab);
break;
case 0xdd: /* VES1893A rev2 */
printk("ves1x93: Detected ves1893a rev2\n");
state->demod_type = DEMOD_VES1893;
state->init_1x93_tab = init_1893_tab;
state->init_1x93_wtab = init_1893_wtab;
state->tab_size = sizeof(init_1893_tab);
break;
case 0xde: /* VES1993 */
printk("ves1x93: Detected ves1993\n");
state->demod_type = DEMOD_VES1993;
state->init_1x93_tab = init_1993_tab;
state->init_1x93_wtab = init_1993_wtab;
state->tab_size = sizeof(init_1993_tab);
break;
default:
goto error;
}
/* create dvb_frontend */
memcpy(&state->frontend.ops, &ves1x93_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static struct dvb_frontend_ops ves1x93_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "VLSI VES1x93 DVB-S",
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 125, /* kHz for QPSK frontends */
.frequency_tolerance = 29500,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
/* .symbol_rate_tolerance = ???,*/
.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 = ves1x93_release,
.init = ves1x93_init,
.sleep = ves1x93_sleep,
.i2c_gate_ctrl = ves1x93_i2c_gate_ctrl,
.set_frontend = ves1x93_set_frontend,
.get_frontend = ves1x93_get_frontend,
.read_status = ves1x93_read_status,
.read_ber = ves1x93_read_ber,
.read_signal_strength = ves1x93_read_signal_strength,
.read_snr = ves1x93_read_snr,
.read_ucblocks = ves1x93_read_ucblocks,
.set_voltage = ves1x93_set_voltage,
};
module_param(debug, int, 0644);
MODULE_DESCRIPTION("VLSI VES1x93 DVB-S Demodulator driver");
MODULE_AUTHOR("Ralph Metzler");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(ves1x93_attach);
