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|
/*
NxtWave Communications - NXT6000 demodulator driver
This driver currently supports:
Alps TDME7 (Tuner: MITEL SP5659)
Alps TDED4 (Tuner: TI ALP510, external Nxt6000)
Copyright (C) 2002-2003 Florian Schirmer <schirmer@taytron.net>
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/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <asm/io.h>
#include <linux/i2c.h>
#include "dvb_frontend.h"
#include "nxt6000.h"
MODULE_DESCRIPTION("NxtWave NXT6000 DVB demodulator driver");
MODULE_AUTHOR("Florian Schirmer");
MODULE_LICENSE("GPL");
static struct dvb_frontend_info nxt6000_info = {
.name = "NxtWave NXT6000",
.type = FE_OFDM,
.frequency_min = 48250000,
.frequency_max = 863250000,
.frequency_stepsize = 62500,
/*.frequency_tolerance = */ /* FIXME: 12% of SR */
.symbol_rate_min = 0, /* FIXME */
.symbol_rate_max = 9360000, /* FIXME */
.symbol_rate_tolerance = 4000,
.notifier_delay = 0,
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
// FE_CAN_BANDWIDTH_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO,
};
static int nxt6000_writereg(struct dvb_i2c_bus *i2c, u8 reg, u8 data)
{
u8 buf[] = {reg, data};
struct i2c_msg msg = {addr: 0x14 >> 1, flags: 0, buf: buf, len: 2};
int ret;
if ((ret = i2c->xfer(i2c, &msg, 1)) != 1)
printk("nxt6000: nxt6000_write error (reg: 0x%02X <- data: 0x%02X)\n", reg, data);
return (ret != 1) ? -EFAULT : 0;
}
static u8 nxt6000_readreg(struct dvb_i2c_bus *i2c, u8 reg)
{
int ret;
u8 b0[] = {reg};
u8 b1[] = {0};
struct i2c_msg msgs[] = {{addr: 0x14 >> 1, flags: 0, buf: b0, len: 1},
{addr: 0x14 >> 1, flags: I2C_M_RD, buf: b1, len: 1}};
ret = i2c->xfer(i2c, msgs, 2);
if (ret != 2)
printk("nxt6000: nxt6000_read error (reg: 0x%02X, ret=%d)\n", reg, ret);
return b1[0];
}
static int pll_write(struct dvb_i2c_bus *i2c, u8 addr, u8 *buf, u8 len)
{
struct i2c_msg msg = {addr: addr >> 1, flags: 0, buf: buf, len: len};
int ret;
nxt6000_writereg(i2c, ENABLE_TUNER_IIC, 0x01); /* open i2c bus switch */
ret = i2c->xfer(i2c, &msg, 1);
nxt6000_writereg(i2c, ENABLE_TUNER_IIC, 0x00); /* close i2c bus switch */
if (ret != 1)
printk("nxt6000: pll_write error %d\n", ret);
return (ret != 1) ? -EFAULT : 0;
}
#define FREQ2DIV(freq) ((freq + 36166667) / 166667)
static int sp5659_set_tv_freq(struct dvb_i2c_bus *i2c, u32 freq)
{
u8 buf[4];
buf[0] = (FREQ2DIV(freq) >> 8) & 0x7F;
buf[1] = FREQ2DIV(freq) & 0xFF;
buf[2] = (((FREQ2DIV(freq) >> 15) & 0x03) << 5) | 0x85;
if ((freq >= 174000000) && (freq < 230000000))
buf[3] = 0x82;
else if ((freq >= 470000000) && (freq < 782000000))
buf[3] = 0x85;
else if ((freq >= 782000000) && (freq < 863000000))
buf[3] = 0xC5;
else
return -EINVAL;
return pll_write(i2c, 0xC2, buf, 4);
}
static int alp510_set_tv_freq(struct dvb_i2c_bus *i2c, u32 freq)
{
u8 buf[4];
buf[0] = (FREQ2DIV(freq) >> 8) & 0x7F;
buf[1] = FREQ2DIV(freq) & 0xFF;
buf[2] = 0x85;
if ((freq >= 47000000) && (freq < 153000000))
buf[3] = 0x01;
else if ((freq >= 153000000) && (freq < 430000000))
buf[3] = 0x02;
else if ((freq >= 430000000) && (freq < 824000000))
buf[3] = 0x08;
else if ((freq >= 824000000) && (freq < 863000000))
buf[3] = 0x88;
else
return -EINVAL;
// Enable 8K SAW BW mode
buf[3] |= (1 << 2);
return pll_write(i2c, 0xC0, buf, 4);
}
#if 0
static int SetInversion(struct dvb_i2c_bus *i2c, int inversion)
{
u8 val;
if (inversion == stv->inv)
return 0;
stv->inv=inversion;
switch (inversion) {
case INVERSION_AUTO: // Hmm, return EINVAL or leave it like this?
default:
case INVERSION_OFF:
val=0x01;
break;
case INVERSION_ON:
val=0x00;
break;
}
writereg(client, 0x0c,
(readreg(client, 0x0c)&0xfe)|val);
return 0;
}
#endif
static void nxt6000_reset(struct dvb_i2c_bus *i2c)
{
nxt6000_writereg(i2c, RS_COR_SYNC_PARAM, SYNC_PARAM);
nxt6000_writereg(i2c, BER_CTRL, /*(1 << 2) |*/ (1 << 1) | 1);
nxt6000_writereg(i2c, VIT_COR_CTL, (1 << 7) | (1 << 1));
// VIT_BER_TIMER_?
nxt6000_writereg(i2c, OFDM_COR_CTL, (1 << 5) | (nxt6000_readreg(i2c, OFDM_COR_CTL) & 0x0F));
// Auto mode with MODE8K & 1/8 guard as default
nxt6000_writereg(i2c, OFDM_COR_MODEGUARD, (1 << 2) | 2);
// OFDM_AGC_CTL tune zap time
nxt6000_writereg(i2c, OFDM_ITB_FREQ_1, 0x06);
nxt6000_writereg(i2c, OFDM_ITB_FREQ_2, 0x31);
// CAS_FREQ
nxt6000_writereg(i2c, OFDM_SYR_CTL, 1 << 2);
nxt6000_writereg(i2c, OFDM_PPM_CTL_1, PPM256);
nxt6000_writereg(i2c, OFDM_TRL_NOMINALRATE_1, 0x49);
nxt6000_writereg(i2c, OFDM_TRL_NOMINALRATE_2, 0x72);
nxt6000_writereg(i2c, ANALOG_CONTROL_0, 1 << 5);
nxt6000_writereg(i2c, EN_DMD_RACQ, (1 << 7) | (3 << 4) | 2);
nxt6000_writereg(i2c, DIAG_CONFIG, TB_SET);
nxt6000_writereg(i2c, SUB_DIAG_MODE_SEL, 0);
nxt6000_writereg(i2c, SUB_DIAG_MODE_SEL, CLKINVERSION);
nxt6000_writereg(i2c, TS_FORMAT, 0);
// nxt6000_writereg(i2c, TS_FORMAT, GATED_CLOCK);
}
#if 1
static void nxt6000_dump_status(struct dvb_i2c_bus *i2c)
{
printk("RS_COR_STAT: 0x%02X\n", nxt6000_readreg(i2c, RS_COR_STAT));
printk("VIT_SYNC_STATUS: 0x%02X\n", nxt6000_readreg(i2c, VIT_SYNC_STATUS));
printk("OFDM_COR_STAT: 0x%02X\n", nxt6000_readreg(i2c, OFDM_COR_STAT));
printk("OFDM_SYR_STAT: 0x%02X\n", nxt6000_readreg(i2c, OFDM_SYR_STAT));
printk("OFDM_TPS_RCVD_1: 0x%02X\n", nxt6000_readreg(i2c, OFDM_TPS_RCVD_1));
// printk("OFDM_TPS_RCVD_2: 0x%02X\n", nxt6000_readreg(i2c, OFDM_TPS_RCVD_2));
// printk("OFDM_TPS_RCVD_3: 0x%02X\n", nxt6000_readreg(i2c, OFDM_TPS_RCVD_3));
// printk("OFDM_TPS_RCVD_4: 0x%02X\n", nxt6000_readreg(i2c, OFDM_TPS_RCVD_4));
// printk("OFDM_TPS_RESERVED_1: 0x%02X\n", nxt6000_readreg(i2c, OFDM_TPS_RESERVED_1));
// printk("OFDM_TPS_RESERVED_2: 0x%02X\n", nxt6000_readreg(i2c, OFDM_TPS_RESERVED_2));
// printk("RF_AGC_STATUS: 0x%02X\n", nxt6000_readreg(i2c, RF_AGC_STATUS));
}
#endif
static int nxt6000_ioctl(struct dvb_frontend *fe, unsigned int cmd, void *arg)
{
switch (cmd) {
case FE_GET_INFO:
memcpy(arg, &nxt6000_info, sizeof (struct dvb_frontend_info));
return 0;
case FE_READ_STATUS:
{
fe_status_t *status = (fe_status_t *)arg;
#if 0
u8 core_status;
nxt6000_dump_status(fe->i2c);
*status = 0;
core_status = nxt6000_readreg(fe->i2c, OFDM_COR_STAT);
if (core_status & AGCLOCKED)
*status |= FE_HAS_SIGNAL;
if (nxt6000_readreg(fe->i2c, OFDM_SYR_STAT) & GI14_SYR_LOCK)
*status |= FE_HAS_CARRIER;
if (nxt6000_readreg(fe->i2c, VIT_SYNC_STATUS) & VITINSYNC)
*status |= FE_HAS_VITERBI;
if (nxt6000_readreg(fe->i2c, RS_COR_STAT) & RSCORESTATUS)
*status |= FE_HAS_SYNC;
if (core_status & TPSLOCKED)
*status |= FE_HAS_LOCK;
#endif
*status = FE_HAS_LOCK;
return 0;
}
case FE_READ_BER:
{
u32 *ber = (u32 *)arg;
*ber=0;
return 0;
}
case FE_READ_SIGNAL_STRENGTH:
{
// s16 *signal = (s16 *)arg;
// *signal=(((signed char)readreg(client, 0x16))+128)<<8;
return 0;
}
case FE_READ_SNR:
{
// s16 *snr = (s16 *)arg;
// *snr=readreg(client, 0x24)<<8;
// *snr|=readreg(client, 0x25);
break;
}
case FE_READ_UNCORRECTED_BLOCKS:
{
u32 *ublocks = (u32 *)arg;
*ublocks = 0;
break;
}
case FE_INIT:
case FE_RESET:
nxt6000_reset(fe->i2c);
break;
case FE_SET_FRONTEND:
{
struct dvb_frontend_parameters *param = (struct dvb_frontend_parameters *)arg;
//SetInversion(client, param->Inversion);
//SetFEC(client, param->u.qpsk.FEC_inner);
//SetSymbolrate(client, param->u.qpsk.SymbolRate);
alp510_set_tv_freq(fe->i2c, param->frequency);
break;
}
default:
return -EOPNOTSUPP;
}
return 0;
}
static int nxt6000_attach(struct dvb_i2c_bus *i2c)
{
u8 core_rev;
printk("nxt6000: attach\n");
if ((core_rev = nxt6000_readreg(i2c, OFDM_MSC_REV)) != NXT6000ASICDEVICE) {
printk("nxt6000: core revision is wrong (0x%02X != 0x0B)\n", core_rev);
return -ENODEV;
}
if (pll_write(i2c, 0xC0, NULL, 0) == 0) {
printk("nxt6000: detected TI ALP510 tuner\n");
} else if (pll_write(i2c, 0xC2, NULL, 0) == 0) {
printk("nxt6000: detected MITEL SP5659 tuner\n");
} else {
printk("nxt6000: unable to detect tuner\n");
return -EINVAL;
}
printk("nxt6000: attached at %d:%d\n", i2c->adapter->num, i2c->id);
nxt6000_reset(i2c);
alp510_set_tv_freq(i2c, 658000000);
nxt6000_dump_status(i2c);
return dvb_register_frontend(nxt6000_ioctl, i2c, NULL, &nxt6000_info);
}
static void nxt6000_detach(struct dvb_i2c_bus *i2c)
{
printk("nxt6000: detach\n");
dvb_unregister_frontend(nxt6000_ioctl, i2c);
}
static __init int nxt6000_init(void)
{
printk("nxt6000: init\n");
return dvb_register_i2c_device(THIS_MODULE, nxt6000_attach, nxt6000_detach);
}
static __exit void nxt6000_exit(void)
{
printk("nxt6000: cleanup\n");
dvb_unregister_i2c_device(nxt6000_attach);
}
module_init(nxt6000_init);
module_exit(nxt6000_exit);
|
