Code: Alles auswählen
/*
* at76c651.c
*
* Atmel DVB-C Frontend Driver (at76c651/tua6010xs)
*
* Copyright (C) 2001 fnbrd <fnbrd@gmx.de>
* & 2002-2004 Andreas Oberritter <obi@linuxtv.org>
* & 2003 Wolfram Joost <dbox2@frokaschwei.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; 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.
*
* AT76C651
* http://www.nalanda.nitc.ac.in/industry/datasheets/atmel/acrobat/doc1293.pdf
* http://www.atmel.com/atmel/acrobat/doc1320.pdf
*
* TUA6010XS
* http://www.infineon.com/cgi/ecrm.dll/ecrm/scripts/public_download.jsp?oid=19512
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/slab.h>
#if defined(__powerpc__)
#include <asm/bitops.h>
#endif
#include "dvb_frontend.h"
#include "dvb_i2c.h"
#include "dvb_functions.h"
static int debug = 0;
static u8 at76c651_qam;
static u8 at76c651_revision;
#define dprintk if (debug) printk
// #define AT76C651_PROC_INTERFACE
#ifdef AT76C651_PROC_INTERFACE
#include <linux/proc_fs.h>
static unsigned char at76c651_proc_registered = 0;
#endif
static struct dvb_frontend_info at76c651_info = {
.name = "Atmel AT76C651B with TUA6010XS",
.type = FE_QAM,
.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,
.caps = FE_CAN_INVERSION_AUTO |
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_32 | FE_CAN_QAM_64 | FE_CAN_QAM_128 |
FE_CAN_MUTE_TS | FE_CAN_QAM_256 | FE_CAN_RECOVER
};
#if ! defined(__powerpc__)
static __inline__ int __ilog2(unsigned long x)
{
int i;
if (x == 0)
return -1;
for (i = 0; x != 0; i++)
x >>= 1;
return i - 1;
}
#endif
static int at76c651_writereg(struct dvb_i2c_bus *i2c, u8 reg, u8 data)
{
int ret;
u8 buf[] = { reg, data };
struct i2c_msg msg =
{ .addr = 0x1a >> 1, .flags = 0, .buf = buf, .len = 2 };
ret = i2c->xfer(i2c, &msg, 1);
if (ret != 1)
dprintk("%s: writereg error "
"(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
__FUNCTION__, reg, data, ret);
dvb_delay(10);
return (ret != 1) ? -EREMOTEIO : 0;
}
static u8 at76c651_readreg(struct dvb_i2c_bus *i2c, u8 reg)
{
int ret;
u8 val;
struct i2c_msg msg[] = {
{ .addr = 0x1a >> 1, .flags = 0, .buf = ®, .len = 1 },
{ .addr = 0x1a >> 1, .flags = I2C_M_RD, .buf = &val, .len = 1 }
};
ret = i2c->xfer(i2c, msg, 2);
if (ret != 2)
dprintk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret);
return val;
}
static int at76c651_reset(struct dvb_i2c_bus *i2c)
{
return at76c651_writereg(i2c, 0x07, 0x01);
}
static void at76c651_disable_interrupts(struct dvb_i2c_bus *i2c)
{
at76c651_writereg(i2c, 0x0b, 0x00);
}
static int at76c651_set_auto_config(struct dvb_i2c_bus *i2c)
{
/*
* Autoconfig
*/
at76c651_writereg(i2c, 0x06, 0x01);
at76c651_writereg(i2c, 0x30, 0x94);
at76c651_writereg(i2c, 0x31, 0x8A); //0.01 02.0 0x8A 0x9C
at76c651_writereg(i2c, 0x32, 0x9C); //0.01 02.0 0x8A 0x9C
at76c651_writereg(i2c, 0x33, 0x8A);
at76c651_writereg(i2c, 0x34, 0x9C);
/*
* Performance optimizations, should be done after autoconfig
*/
at76c651_writereg(i2c, 0x10, 0x06);
at76c651_writereg(i2c, 0x11, ((at76c651_qam == 5) || (at76c651_qam == 7)) ? 0x12 : 0x10);
at76c651_writereg(i2c, 0x15, 0x28);
at76c651_writereg(i2c, 0x20, 0x09);
at76c651_writereg(i2c, 0x24, ((at76c651_qam == 5) || (at76c651_qam == 7)) ? 0xC0 : 0x90);
at76c651_writereg(i2c, 0x30, 0x90);
if (at76c651_qam == 5)
at76c651_writereg(i2c, 0x35, 0x2A);
/*
* Initialize A/D-converter
*/
if (at76c651_revision == 0x11) {
at76c651_writereg(i2c, 0x2E, 0x38);
at76c651_writereg(i2c, 0x2F, 0x13);
}
at76c651_disable_interrupts(i2c);
/*
* Restart operation
*/
at76c651_reset(i2c);
return 0;
}
static void at76c651_set_bbfreq(struct dvb_i2c_bus *i2c)
{
at76c651_writereg(i2c, 0x04, 0x3f);
at76c651_writereg(i2c, 0x05, 0xee);
}
static int at76c651_pll_write(struct dvb_i2c_bus *i2c, u8 *buf, size_t len)
{
int ret;
struct i2c_msg msg =
{ .addr = 0xc2 >> 1, .flags = 0, .buf = buf, .len = len };
at76c651_writereg(i2c, 0x0c, 0xc3);
ret = i2c->xfer(i2c, &msg, 1);
at76c651_writereg(i2c, 0x0c, 0xc2);
return (ret != 1) ? -EREMOTEIO : 0;
}
static int tua6010_setfreq(struct dvb_i2c_bus *i2c, u32 freq)
{
u32 div;
u8 buf[4];
u8 vu, p2, p1, p0;
/* 47 MHz ... 862 MHz */
if ((freq < 47000000) || (freq > 862000000))
return -EINVAL;
div = (freq + 36118750 + 31250) / 62500;
if (freq > 401250000)
vu = 1; /* UHF */
else
vu = 0; /* VHF */
if (freq > 401250000)
p2 = 1, p1 = 0, p0 = 1;
else if (freq > 117250000)
p2 = 1, p1 = 1, p0 = 0;
else
p2 = 0, p1 = 1, p0 = 1;
buf[0] = (div >> 8) & 0x7f;
buf[1] = (div >> 0) & 0xff;
buf[2] = 0x8e;
buf[3] = (vu << 7) | (p2 << 2) | (p1 << 1) | p0;
return at76c651_pll_write(i2c, buf, 4);
}
static int at76c651_set_symbol_rate(struct dvb_i2c_bus *i2c, u32 symbol_rate)
{
u8 exponent;
u32 mantissa;
if (symbol_rate > 9360000)
return -EINVAL;
/*
* FREF = 57800 kHz
* exponent = 10 + floor (log2(symbol_rate / FREF))
* mantissa = (symbol_rate / FREF) * (1 << (30 - exponent))
*/
exponent = __ilog2((symbol_rate << 4) / 903125);
mantissa = ((symbol_rate / 3125) * (1 << (24 - exponent))) / 289;
at76c651_writereg(i2c, 0x00, mantissa >> 13);
at76c651_writereg(i2c, 0x01, mantissa >> 5);
at76c651_writereg(i2c, 0x02, (mantissa << 3) | exponent);
return 0;
}
static int at76c651_set_qam(struct dvb_i2c_bus *i2c, fe_modulation_t qam)
{
switch (qam) {
case QPSK:
at76c651_qam = 0x02;
break;
case QAM_16:
at76c651_qam = 0x04;
break;
case QAM_32:
at76c651_qam = 0x05;
break;
case QAM_64:
at76c651_qam = 0x06;
break;
case QAM_128:
at76c651_qam = 0x07;
break;
case QAM_256:
at76c651_qam = 0x08;
break;
#if 0
case QAM_512:
at76c651_qam = 0x09;
break;
case QAM_1024:
at76c651_qam = 0x0A;
break;
#endif
default:
return -EINVAL;
}
return at76c651_writereg(i2c, 0x03, at76c651_qam);
}
static int at76c651_set_inversion(struct dvb_i2c_bus *i2c,
fe_spectral_inversion_t inversion)
{
u8 feciqinv = at76c651_readreg(i2c, 0x60);
switch (inversion) {
case INVERSION_OFF:
feciqinv |= 0x02;
feciqinv &= 0xFE;
break;
case INVERSION_ON:
feciqinv |= 0x03;
break;
case INVERSION_AUTO:
feciqinv &= 0xFC;
break;
default:
return -EINVAL;
}
return at76c651_writereg(i2c, 0x60, feciqinv);
}
static int at76c651_set_parameters(struct dvb_i2c_bus *i2c,
struct dvb_frontend_parameters *p)
{
int ret;
if ((ret = tua6010_setfreq(i2c, p->frequency)))
return ret;
if ((ret = at76c651_set_symbol_rate(i2c, p->u.qam.symbol_rate)))
return ret;
if ((ret = at76c651_set_qam(i2c, p->u.qam.modulation)))
return ret;
if ((ret = at76c651_set_inversion(i2c, p->inversion)))
return ret;
return at76c651_set_auto_config(i2c);
}
static int at76c651_set_defaults(struct dvb_i2c_bus *i2c)
{
at76c651_set_symbol_rate(i2c, 6900000);
at76c651_set_qam(i2c, QAM_64);
at76c651_set_bbfreq(i2c);
at76c651_set_auto_config(i2c);
return 0;
}
static int at76c651_ioctl(struct dvb_frontend *fe, unsigned int cmd, void *arg)
{
switch (cmd) {
case FE_GET_INFO:
memcpy(arg, &at76c651_info, sizeof(struct dvb_frontend_info));
break;
case FE_READ_STATUS:
{
fe_status_t *status = arg;
u8 sync;
/*
* Bits: FEC, CAR, EQU, TIM, AGC2, AGC1, ADC, PLL (PLL=0)
*/
sync = at76c651_readreg(fe->i2c, 0x80);
*status = 0;
if (sync & (0x04 | 0x10)) /* AGC1 || TIM */
*status |= FE_HAS_SIGNAL;
if (sync & 0x10) /* TIM */
*status |= FE_HAS_CARRIER;
if (sync & 0x80) /* FEC */
*status |= FE_HAS_VITERBI;
if (sync & 0x40) /* CAR */
*status |= FE_HAS_SYNC;
if ((sync & 0xF0) == 0xF0) /* TIM && EQU && CAR && FEC */
*status |= FE_HAS_LOCK;
break;
}
case FE_READ_BER:
{
u32 ber = at76c651_readreg(fe->i2c, 0x83) |
(at76c651_readreg(fe->i2c, 0x82) << 8) |
((at76c651_readreg(fe->i2c, 0x81) & 0x0f) << 16);
*((u32*) arg) = ber;
break;
}
case FE_READ_SIGNAL_STRENGTH:
{
u8 gain = at76c651_readreg(fe->i2c, 0x91);
*((u16 *)arg) = (gain << 8) | gain;
break;
}
case FE_READ_SNR:
*(u16 *)arg = 0xFFFF -
((at76c651_readreg(fe->i2c, 0x8F) << 8) |
at76c651_readreg(fe->i2c, 0x90));
break;
case FE_READ_UNCORRECTED_BLOCKS:
*(u32 *)arg = at76c651_readreg(fe->i2c, 0x82);
break;
case FE_SET_FRONTEND:
return at76c651_set_parameters(fe->i2c, arg);
case FE_GET_FRONTEND:
break;
case FE_SLEEP:
break;
case FE_INIT:
return at76c651_set_defaults(fe->i2c);
case FE_RESET:
return at76c651_reset(fe->i2c);
default:
return -ENOIOCTLCMD;
}
return 0;
}
#ifdef AT76C651_PROC_INTERFACE
static int at76c651_proc_read(char *buf, char **start, off_t offset, int len, int *eof, void *i2c)
{
int nr;
u8 val;
int idx;
u8 bit;
u32 ber;
const char *lockdescr[8] =
{ "FEC", "CAR", "EQU", "TIM", "AGC2", "AGC1", "ADC", "PLL" };
if (at76c651_revision == 0x10)
nr = sprintf(buf, "Status of AT76C651A demodulator:\n");
else
nr = sprintf(buf, "Status of AT76C651B demodulator:\n");
val = at76c651_readreg(i2c, 0x80);
nr += sprintf(buf, "Lock (0x%02X): ", val);
bit = 0x80;
for (idx = 0; idx < 8; idx++) {
if (val & bit)
nr += sprintf(buf + nr, "%s ", lockdescr[idx]);
bit >>= 1;
}
ber = ((at76c651_readreg(i2c, 0x81) & 0x0F) << 16) |
(at76c651_readreg(i2c, 0x82) << 8) |
at76c651_readreg(i2c, 0x83);
val = at76c651_readreg(i2c, 0x85);
nr += sprintf(buf + nr - 1, "\nRecoverable block error rate: %d\n"
"Number of uncorrectable frames: %d\n", ber, val) - 1;
nr += sprintf(buf + nr, "Number of A/D-converter-saturations: %d\n"
"AGC1-Value: %d\n",
at76c651_readreg(i2c, 0x19),
at76c651_readreg(i2c, 0x91));
if ((val = at76c651_readreg(i2c, 0x60)) & 0x02)
nr += sprintf(buf + nr, "FEC: manual mode, %s\n",
(val & 0x01) ? "inverse" : "normal");
else
nr += sprintf(buf + nr, "FEC: automatic mode, %s\n",
(val & 0x04) ? "inverse" : "normal");
return nr;
}
static int at76c651_register_proc(struct dvb_i2c_bus *i2c)
{
struct proc_dir_entry *proc_bus_at76c651;
if (!proc_bus)
return -ENOENT;
proc_bus_at76c651 = create_proc_read_entry("at76c651", 0, proc_bus,
&at76c651_proc_read,i2c);
if (!proc_bus_at76c651) {
printk(KERN_ERR "Cannot create /proc/bus/at76c651\n");
return -ENOENT;
}
at76c651_proc_registered = 1;
proc_bus_at76c651->owner = THIS_MODULE;
return 0;
}
static void at76c651_deregister_proc(void)
{
if (at76c651_proc_registered)
remove_proc_entry("at76c651",proc_bus);
at76c651_proc_registered = 0;
}
#endif
static int at76c651_attach(struct dvb_i2c_bus *i2c, void **data)
{
if (at76c651_readreg(i2c, 0x0E) != 0x65)
return -ENODEV;
at76c651_revision = at76c651_readreg(i2c, 0x0F);
switch (at76c651_revision) {
case 0x10:
at76c651_info.name[14] = 'A';
break;
case 0x11:
at76c651_info.name[14] = 'B';
break;
default:
return -ENODEV;
}
at76c651_set_defaults(i2c);
#ifdef AT76C651_PROC_INTERFACE
at76c651_register_proc(i2c);
#endif
return dvb_register_frontend(at76c651_ioctl, i2c, NULL, &at76c651_info);
}
static void at76c651_detach(struct dvb_i2c_bus *i2c, void *data)
{
#ifdef AT76C651_PROC_INTERFACE
at76c651_deregister_proc();
#endif
dvb_unregister_frontend(at76c651_ioctl, i2c);
}
static int __init at76c651_init(void)
{
return dvb_register_i2c_device(THIS_MODULE,
at76c651_attach, at76c651_detach);
}
static void __exit at76c651_exit(void)
{
dvb_unregister_i2c_device(at76c651_attach);
}
module_init(at76c651_init);
module_exit(at76c651_exit);
MODULE_DESCRIPTION("at76c651/dat7021(tua6010xs) dvb-c frontend driver");
MODULE_AUTHOR("Andreas Oberritter <obi@linuxtv.org>");
MODULE_LICENSE("GPL");
MODULE_PARM(debug, "i");