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linux/drivers/media/dvb/frontends/tda10048.c
Matthias Schwarzott 084e24acc9 V4L/DVB (12440): Use kzalloc for frontend states to have struct dvb_frontend properly 
This patch changes most frontend drivers to allocate their state structure via
kzalloc and not kmalloc. This is done to properly initialize the
embedded "struct dvb_frontend frontend" field, that they all have.

The visible effect of this struct being uninitalized is, that the member "id"
that is used to set the name of kernel thread is totally random.

Some board drivers (for example cx88-dvb) set this "id" via
videobuf_dvb_alloc_frontend but most do not.

So I at least get random id values for saa7134, flexcop and ttpci based cards.
It looks like this in dmesg:
DVB: registering adapter 1 frontend -10551321 (ST STV0299 DVB-S)

The related kernel thread then also gets a strange name
like "kdvb-ad-1-fe--1".

Cc: Michael Krufky <mkrufky@linuxtv.org>
Cc: Steven Toth <stoth@linuxtv.org>
Cc: Timothy Lee <timothy.lee@siriushk.com>
Cc: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Acked-by: Andreas Oberritter <obi@linuxtv.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-08-13 20:39:14 -03:00

1173 lines
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/*
NXP TDA10048HN DVB OFDM demodulator driver
Copyright (C) 2009 Steven Toth <stoth@kernellabs.com>
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/init.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <asm/div64.h>
#include "dvb_frontend.h"
#include "dvb_math.h"
#include "tda10048.h"
#define TDA10048_DEFAULT_FIRMWARE "dvb-fe-tda10048-1.0.fw"
#define TDA10048_DEFAULT_FIRMWARE_SIZE 24878
/* Register name definitions */
#define TDA10048_IDENTITY 0x00
#define TDA10048_VERSION 0x01
#define TDA10048_DSP_CODE_CPT 0x0C
#define TDA10048_DSP_CODE_IN 0x0E
#define TDA10048_IN_CONF1 0x10
#define TDA10048_IN_CONF2 0x11
#define TDA10048_IN_CONF3 0x12
#define TDA10048_OUT_CONF1 0x14
#define TDA10048_OUT_CONF2 0x15
#define TDA10048_OUT_CONF3 0x16
#define TDA10048_AUTO 0x18
#define TDA10048_SYNC_STATUS 0x1A
#define TDA10048_CONF_C4_1 0x1E
#define TDA10048_CONF_C4_2 0x1F
#define TDA10048_CODE_IN_RAM 0x20
#define TDA10048_CHANNEL_INFO_1_R 0x22
#define TDA10048_CHANNEL_INFO_2_R 0x23
#define TDA10048_CHANNEL_INFO1 0x24
#define TDA10048_CHANNEL_INFO2 0x25
#define TDA10048_TIME_ERROR_R 0x26
#define TDA10048_TIME_ERROR 0x27
#define TDA10048_FREQ_ERROR_LSB_R 0x28
#define TDA10048_FREQ_ERROR_MSB_R 0x29
#define TDA10048_FREQ_ERROR_LSB 0x2A
#define TDA10048_FREQ_ERROR_MSB 0x2B
#define TDA10048_IT_SEL 0x30
#define TDA10048_IT_STAT 0x32
#define TDA10048_DSP_AD_LSB 0x3C
#define TDA10048_DSP_AD_MSB 0x3D
#define TDA10048_DSP_REF_LSB 0x3E
#define TDA10048_DSP_REF_MSB 0x3F
#define TDA10048_CONF_TRISTATE1 0x44
#define TDA10048_CONF_TRISTATE2 0x45
#define TDA10048_CONF_POLARITY 0x46
#define TDA10048_GPIO_SP_DS0 0x48
#define TDA10048_GPIO_SP_DS1 0x49
#define TDA10048_GPIO_SP_DS2 0x4A
#define TDA10048_GPIO_SP_DS3 0x4B
#define TDA10048_GPIO_OUT_SEL 0x4C
#define TDA10048_GPIO_SELECT 0x4D
#define TDA10048_IC_MODE 0x4E
#define TDA10048_CONF_XO 0x50
#define TDA10048_CONF_PLL1 0x51
#define TDA10048_CONF_PLL2 0x52
#define TDA10048_CONF_PLL3 0x53
#define TDA10048_CONF_ADC 0x54
#define TDA10048_CONF_ADC_2 0x55
#define TDA10048_CONF_C1_1 0x60
#define TDA10048_CONF_C1_3 0x62
#define TDA10048_AGC_CONF 0x70
#define TDA10048_AGC_THRESHOLD_LSB 0x72
#define TDA10048_AGC_THRESHOLD_MSB 0x73
#define TDA10048_AGC_RENORM 0x74
#define TDA10048_AGC_GAINS 0x76
#define TDA10048_AGC_TUN_MIN 0x78
#define TDA10048_AGC_TUN_MAX 0x79
#define TDA10048_AGC_IF_MIN 0x7A
#define TDA10048_AGC_IF_MAX 0x7B
#define TDA10048_AGC_TUN_LEVEL 0x7E
#define TDA10048_AGC_IF_LEVEL 0x7F
#define TDA10048_DIG_AGC_LEVEL 0x81
#define TDA10048_FREQ_PHY2_LSB 0x86
#define TDA10048_FREQ_PHY2_MSB 0x87
#define TDA10048_TIME_INVWREF_LSB 0x88
#define TDA10048_TIME_INVWREF_MSB 0x89
#define TDA10048_TIME_WREF_LSB 0x8A
#define TDA10048_TIME_WREF_MID1 0x8B
#define TDA10048_TIME_WREF_MID2 0x8C
#define TDA10048_TIME_WREF_MSB 0x8D
#define TDA10048_NP_OUT 0xA2
#define TDA10048_CELL_ID_LSB 0xA4
#define TDA10048_CELL_ID_MSB 0xA5
#define TDA10048_EXTTPS_ODD 0xAA
#define TDA10048_EXTTPS_EVEN 0xAB
#define TDA10048_TPS_LENGTH 0xAC
#define TDA10048_FREE_REG_1 0xB2
#define TDA10048_FREE_REG_2 0xB3
#define TDA10048_CONF_C3_1 0xC0
#define TDA10048_CYBER_CTRL 0xC2
#define TDA10048_CBER_NMAX_LSB 0xC4
#define TDA10048_CBER_NMAX_MSB 0xC5
#define TDA10048_CBER_LSB 0xC6
#define TDA10048_CBER_MSB 0xC7
#define TDA10048_VBER_LSB 0xC8
#define TDA10048_VBER_MID 0xC9
#define TDA10048_VBER_MSB 0xCA
#define TDA10048_CYBER_LUT 0xCC
#define TDA10048_UNCOR_CTRL 0xCD
#define TDA10048_UNCOR_CPT_LSB 0xCE
#define TDA10048_UNCOR_CPT_MSB 0xCF
#define TDA10048_SOFT_IT_C3 0xD6
#define TDA10048_CONF_TS2 0xE0
#define TDA10048_CONF_TS1 0xE1
static unsigned int debug;
#define dprintk(level, fmt, arg...)\
do { if (debug >= level)\
printk(KERN_DEBUG "tda10048: " fmt, ## arg);\
} while (0)
struct tda10048_state {
struct i2c_adapter *i2c;
/* We'll cache and update the attach config settings */
struct tda10048_config config;
struct dvb_frontend frontend;
int fwloaded;
u32 freq_if_hz;
u32 xtal_hz;
u32 pll_mfactor;
u32 pll_nfactor;
u32 pll_pfactor;
u32 sample_freq;
enum fe_bandwidth bandwidth;
};
static struct init_tab {
u8 reg;
u16 data;
} init_tab[] = {
{ TDA10048_CONF_PLL1, 0x08 },
{ TDA10048_CONF_ADC_2, 0x00 },
{ TDA10048_CONF_C4_1, 0x00 },
{ TDA10048_CONF_PLL1, 0x0f },
{ TDA10048_CONF_PLL2, 0x0a },
{ TDA10048_CONF_PLL3, 0x43 },
{ TDA10048_FREQ_PHY2_LSB, 0x02 },
{ TDA10048_FREQ_PHY2_MSB, 0x0a },
{ TDA10048_TIME_WREF_LSB, 0xbd },
{ TDA10048_TIME_WREF_MID1, 0xe4 },
{ TDA10048_TIME_WREF_MID2, 0xa8 },
{ TDA10048_TIME_WREF_MSB, 0x02 },
{ TDA10048_TIME_INVWREF_LSB, 0x04 },
{ TDA10048_TIME_INVWREF_MSB, 0x06 },
{ TDA10048_CONF_C4_1, 0x00 },
{ TDA10048_CONF_C1_1, 0xa8 },
{ TDA10048_AGC_CONF, 0x16 },
{ TDA10048_CONF_C1_3, 0x0b },
{ TDA10048_AGC_TUN_MIN, 0x00 },
{ TDA10048_AGC_TUN_MAX, 0xff },
{ TDA10048_AGC_IF_MIN, 0x00 },
{ TDA10048_AGC_IF_MAX, 0xff },
{ TDA10048_AGC_THRESHOLD_MSB, 0x00 },
{ TDA10048_AGC_THRESHOLD_LSB, 0x70 },
{ TDA10048_CYBER_CTRL, 0x38 },
{ TDA10048_AGC_GAINS, 0x12 },
{ TDA10048_CONF_XO, 0x00 },
{ TDA10048_CONF_TS1, 0x07 },
{ TDA10048_IC_MODE, 0x00 },
{ TDA10048_CONF_TS2, 0xc0 },
{ TDA10048_CONF_TRISTATE1, 0x21 },
{ TDA10048_CONF_TRISTATE2, 0x00 },
{ TDA10048_CONF_POLARITY, 0x00 },
{ TDA10048_CONF_C4_2, 0x04 },
{ TDA10048_CONF_ADC, 0x60 },
{ TDA10048_CONF_ADC_2, 0x10 },
{ TDA10048_CONF_ADC, 0x60 },
{ TDA10048_CONF_ADC_2, 0x00 },
{ TDA10048_CONF_C1_1, 0xa8 },
{ TDA10048_UNCOR_CTRL, 0x00 },
{ TDA10048_CONF_C4_2, 0x04 },
};
static struct pll_tab {
u32 clk_freq_khz;
u32 if_freq_khz;
u8 m, n, p;
} pll_tab[] = {
{ TDA10048_CLK_4000, TDA10048_IF_36130, 10, 0, 0 },
{ TDA10048_CLK_16000, TDA10048_IF_3300, 10, 3, 0 },
{ TDA10048_CLK_16000, TDA10048_IF_3500, 10, 3, 0 },
{ TDA10048_CLK_16000, TDA10048_IF_3800, 10, 3, 0 },
{ TDA10048_CLK_16000, TDA10048_IF_4000, 10, 3, 0 },
{ TDA10048_CLK_16000, TDA10048_IF_4300, 10, 3, 0 },
{ TDA10048_CLK_16000, TDA10048_IF_36130, 10, 3, 0 },
};
static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
{
struct tda10048_config *config = &state->config;
int ret;
u8 buf[] = { reg, data };
struct i2c_msg msg = {
.addr = config->demod_address,
.flags = 0, .buf = buf, .len = 2 };
dprintk(2, "%s(reg = 0x%02x, data = 0x%02x)\n", __func__, reg, data);
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1)
printk("%s: writereg error (ret == %i)\n", __func__, ret);
return (ret != 1) ? -1 : 0;
}
static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
{
struct tda10048_config *config = &state->config;
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {
{ .addr = config->demod_address,
.flags = 0, .buf = b0, .len = 1 },
{ .addr = config->demod_address,
.flags = I2C_M_RD, .buf = b1, .len = 1 } };
dprintk(2, "%s(reg = 0x%02x)\n", __func__, reg);
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2)
printk(KERN_ERR "%s: readreg error (ret == %i)\n",
__func__, ret);
return b1[0];
}
static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
const u8 *data, u16 len)
{
struct tda10048_config *config = &state->config;
int ret = -EREMOTEIO;
struct i2c_msg msg;
u8 *buf;
dprintk(2, "%s(%d, ?, len = %d)\n", __func__, reg, len);
buf = kmalloc(len + 1, GFP_KERNEL);
if (buf == NULL) {
ret = -ENOMEM;
goto error;
}
*buf = reg;
memcpy(buf + 1, data, len);
msg.addr = config->demod_address;
msg.flags = 0;
msg.buf = buf;
msg.len = len + 1;
dprintk(2, "%s(): write len = %d\n",
__func__, msg.len);
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1) {
printk(KERN_ERR "%s(): writereg error err %i\n",
__func__, ret);
ret = -EREMOTEIO;
}
error:
kfree(buf);
return ret;
}
static int tda10048_set_phy2(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 if_hz)
{
struct tda10048_state *state = fe->demodulator_priv;
u64 t;
dprintk(1, "%s()\n", __func__);
if (sample_freq_hz == 0)
return -EINVAL;
if (if_hz < (sample_freq_hz / 2)) {
/* PHY2 = (if2/fs) * 2^15 */
t = if_hz;
t *= 10;
t *= 32768;
do_div(t, sample_freq_hz);
t += 5;
do_div(t, 10);
} else {
/* PHY2 = ((IF1-fs)/fs) * 2^15 */
t = sample_freq_hz - if_hz;
t *= 10;
t *= 32768;
do_div(t, sample_freq_hz);
t += 5;
do_div(t, 10);
t = ~t + 1;
}
tda10048_writereg(state, TDA10048_FREQ_PHY2_LSB, (u8)t);
tda10048_writereg(state, TDA10048_FREQ_PHY2_MSB, (u8)(t >> 8));
return 0;
}
static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 bw)
{
struct tda10048_state *state = fe->demodulator_priv;
u64 t, z;
u32 b = 8000000;
dprintk(1, "%s()\n", __func__);
if (sample_freq_hz == 0)
return -EINVAL;
if (bw == BANDWIDTH_6_MHZ)
b = 6000000;
else
if (bw == BANDWIDTH_7_MHZ)
b = 7000000;
/* WREF = (B / (7 * fs)) * 2^31 */
t = b * 10;
/* avoid warning: this decimal constant is unsigned only in ISO C90 */
/* t *= 2147483648 on 32bit platforms */
t *= (2048 * 1024);
t *= 1024;
z = 7 * sample_freq_hz;
do_div(t, z);
t += 5;
do_div(t, 10);
tda10048_writereg(state, TDA10048_TIME_WREF_LSB, (u8)t);
tda10048_writereg(state, TDA10048_TIME_WREF_MID1, (u8)(t >> 8));
tda10048_writereg(state, TDA10048_TIME_WREF_MID2, (u8)(t >> 16));
tda10048_writereg(state, TDA10048_TIME_WREF_MSB, (u8)(t >> 24));
return 0;
}
static int tda10048_set_invwref(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 bw)
{
struct tda10048_state *state = fe->demodulator_priv;
u64 t;
u32 b = 8000000;
dprintk(1, "%s()\n", __func__);
if (sample_freq_hz == 0)
return -EINVAL;
if (bw == BANDWIDTH_6_MHZ)
b = 6000000;
else
if (bw == BANDWIDTH_7_MHZ)
b = 7000000;
/* INVWREF = ((7 * fs) / B) * 2^5 */
t = sample_freq_hz;
t *= 7;
t *= 32;
t *= 10;
do_div(t, b);
t += 5;
do_div(t, 10);
tda10048_writereg(state, TDA10048_TIME_INVWREF_LSB, (u8)t);
tda10048_writereg(state, TDA10048_TIME_INVWREF_MSB, (u8)(t >> 8));
return 0;
}
static int tda10048_set_bandwidth(struct dvb_frontend *fe,
enum fe_bandwidth bw)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s(bw=%d)\n", __func__, bw);
/* Bandwidth setting may need to be adjusted */
switch (bw) {
case BANDWIDTH_6_MHZ:
case BANDWIDTH_7_MHZ:
case BANDWIDTH_8_MHZ:
tda10048_set_wref(fe, state->sample_freq, bw);
tda10048_set_invwref(fe, state->sample_freq, bw);
break;
default:
printk(KERN_ERR "%s() invalid bandwidth\n", __func__);
return -EINVAL;
}
state->bandwidth = bw;
return 0;
}
static int tda10048_set_if(struct dvb_frontend *fe, enum fe_bandwidth bw)
{
struct tda10048_state *state = fe->demodulator_priv;
struct tda10048_config *config = &state->config;
int i;
u32 if_freq_khz;
dprintk(1, "%s(bw = %d)\n", __func__, bw);
/* based on target bandwidth and clk we calculate pll factors */
switch (bw) {
case BANDWIDTH_6_MHZ:
if_freq_khz = config->dtv6_if_freq_khz;
break;
case BANDWIDTH_7_MHZ:
if_freq_khz = config->dtv7_if_freq_khz;
break;
case BANDWIDTH_8_MHZ:
if_freq_khz = config->dtv8_if_freq_khz;
break;
default:
printk(KERN_ERR "%s() no default\n", __func__);
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(pll_tab); i++) {
if ((pll_tab[i].clk_freq_khz == config->clk_freq_khz) &&
(pll_tab[i].if_freq_khz == if_freq_khz)) {
state->freq_if_hz = pll_tab[i].if_freq_khz * 1000;
state->xtal_hz = pll_tab[i].clk_freq_khz * 1000;
state->pll_mfactor = pll_tab[i].m;
state->pll_nfactor = pll_tab[i].n;
state->pll_pfactor = pll_tab[i].p;
break;
}
}
if (i == ARRAY_SIZE(pll_tab)) {
printk(KERN_ERR "%s() Incorrect attach settings\n",
__func__);
return -EINVAL;
}
dprintk(1, "- freq_if_hz = %d\n", state->freq_if_hz);
dprintk(1, "- xtal_hz = %d\n", state->xtal_hz);
dprintk(1, "- pll_mfactor = %d\n", state->pll_mfactor);
dprintk(1, "- pll_nfactor = %d\n", state->pll_nfactor);
dprintk(1, "- pll_pfactor = %d\n", state->pll_pfactor);
/* Calculate the sample frequency */
state->sample_freq = state->xtal_hz * (state->pll_mfactor + 45);
state->sample_freq /= (state->pll_nfactor + 1);
state->sample_freq /= (state->pll_pfactor + 4);
dprintk(1, "- sample_freq = %d\n", state->sample_freq);
/* Update the I/F */
tda10048_set_phy2(fe, state->sample_freq, state->freq_if_hz);
return 0;
}
static int tda10048_firmware_upload(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
struct tda10048_config *config = &state->config;
const struct firmware *fw;
int ret;
int pos = 0;
int cnt;
u8 wlen = config->fwbulkwritelen;
if ((wlen != TDA10048_BULKWRITE_200) && (wlen != TDA10048_BULKWRITE_50))
wlen = TDA10048_BULKWRITE_200;
/* request the firmware, this will block and timeout */
printk(KERN_INFO "%s: waiting for firmware upload (%s)...\n",
__func__,
TDA10048_DEFAULT_FIRMWARE);
ret = request_firmware(&fw, TDA10048_DEFAULT_FIRMWARE,
state->i2c->dev.parent);
if (ret) {
printk(KERN_ERR "%s: Upload failed. (file not found?)\n",
__func__);
return -EIO;
} else {
printk(KERN_INFO "%s: firmware read %Zu bytes.\n",
__func__,
fw->size);
ret = 0;
}
if (fw->size != TDA10048_DEFAULT_FIRMWARE_SIZE) {
printk(KERN_ERR "%s: firmware incorrect size\n", __func__);
ret = -EIO;
} else {
printk(KERN_INFO "%s: firmware uploading\n", __func__);
/* Soft reset */
tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
& 0xfe);
tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
| 0x01);
/* Put the demod into host download mode */
tda10048_writereg(state, TDA10048_CONF_C4_1,
tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xf9);
/* Boot the DSP */
tda10048_writereg(state, TDA10048_CONF_C4_1,
tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x08);
/* Prepare for download */
tda10048_writereg(state, TDA10048_DSP_CODE_CPT, 0);
/* Download the firmware payload */
while (pos < fw->size) {
if ((fw->size - pos) > wlen)
cnt = wlen;
else
cnt = fw->size - pos;
tda10048_writeregbulk(state, TDA10048_DSP_CODE_IN,
&fw->data[pos], cnt);
pos += cnt;
}
ret = -EIO;
/* Wait up to 250ms for the DSP to boot */
for (cnt = 0; cnt < 250 ; cnt += 10) {
msleep(10);
if (tda10048_readreg(state, TDA10048_SYNC_STATUS)
& 0x40) {
ret = 0;
break;
}
}
}
release_firmware(fw);
if (ret == 0) {
printk(KERN_INFO "%s: firmware uploaded\n", __func__);
state->fwloaded = 1;
} else
printk(KERN_ERR "%s: firmware upload failed\n", __func__);
return ret;
}
static int tda10048_set_inversion(struct dvb_frontend *fe, int inversion)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s(%d)\n", __func__, inversion);
if (inversion == TDA10048_INVERSION_ON)
tda10048_writereg(state, TDA10048_CONF_C1_1,
tda10048_readreg(state, TDA10048_CONF_C1_1) | 0x20);
else
tda10048_writereg(state, TDA10048_CONF_C1_1,
tda10048_readreg(state, TDA10048_CONF_C1_1) & 0xdf);
return 0;
}
/* Retrieve the demod settings */
static int tda10048_get_tps(struct tda10048_state *state,
struct dvb_ofdm_parameters *p)
{
u8 val;
/* Make sure the TPS regs are valid */
if (!(tda10048_readreg(state, TDA10048_AUTO) & 0x01))
return -EAGAIN;
val = tda10048_readreg(state, TDA10048_OUT_CONF2);
switch ((val & 0x60) >> 5) {
case 0:
p->constellation = QPSK;
break;
case 1:
p->constellation = QAM_16;
break;
case 2:
p->constellation = QAM_64;
break;
}
switch ((val & 0x18) >> 3) {
case 0:
p->hierarchy_information = HIERARCHY_NONE;
break;
case 1:
p->hierarchy_information = HIERARCHY_1;
break;
case 2:
p->hierarchy_information = HIERARCHY_2;
break;
case 3:
p->hierarchy_information = HIERARCHY_4;
break;
}
switch (val & 0x07) {
case 0:
p->code_rate_HP = FEC_1_2;
break;
case 1:
p->code_rate_HP = FEC_2_3;
break;
case 2:
p->code_rate_HP = FEC_3_4;
break;
case 3:
p->code_rate_HP = FEC_5_6;
break;
case 4:
p->code_rate_HP = FEC_7_8;
break;
}
val = tda10048_readreg(state, TDA10048_OUT_CONF3);
switch (val & 0x07) {
case 0:
p->code_rate_LP = FEC_1_2;
break;
case 1:
p->code_rate_LP = FEC_2_3;
break;
case 2:
p->code_rate_LP = FEC_3_4;
break;
case 3:
p->code_rate_LP = FEC_5_6;
break;
case 4:
p->code_rate_LP = FEC_7_8;
break;
}
val = tda10048_readreg(state, TDA10048_OUT_CONF1);
switch ((val & 0x0c) >> 2) {
case 0:
p->guard_interval = GUARD_INTERVAL_1_32;
break;
case 1:
p->guard_interval = GUARD_INTERVAL_1_16;
break;
case 2:
p->guard_interval = GUARD_INTERVAL_1_8;
break;
case 3:
p->guard_interval = GUARD_INTERVAL_1_4;
break;
}
switch (val & 0x02) {
case 0:
p->transmission_mode = TRANSMISSION_MODE_2K;
break;
case 1:
p->transmission_mode = TRANSMISSION_MODE_8K;
break;
}
return 0;
}
static int tda10048_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct tda10048_state *state = fe->demodulator_priv;
struct tda10048_config *config = &state->config;
dprintk(1, "%s(%d)\n", __func__, enable);
if (config->disable_gate_access)
return 0;
if (enable)
return tda10048_writereg(state, TDA10048_CONF_C4_1,
tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x02);
else
return tda10048_writereg(state, TDA10048_CONF_C4_1,
tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xfd);
}
static int tda10048_output_mode(struct dvb_frontend *fe, int serial)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s(%d)\n", __func__, serial);
/* Ensure pins are out of tri-state */
tda10048_writereg(state, TDA10048_CONF_TRISTATE1, 0x21);
tda10048_writereg(state, TDA10048_CONF_TRISTATE2, 0x00);
if (serial) {
tda10048_writereg(state, TDA10048_IC_MODE, 0x80 | 0x20);
tda10048_writereg(state, TDA10048_CONF_TS2, 0xc0);
} else {
tda10048_writereg(state, TDA10048_IC_MODE, 0x00);
tda10048_writereg(state, TDA10048_CONF_TS2, 0x01);
}
return 0;
}
/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
/* TODO: Support manual tuning with specific params */
static int tda10048_set_frontend(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
/* Update the I/F pll's if the bandwidth changes */
if (p->u.ofdm.bandwidth != state->bandwidth) {
tda10048_set_if(fe, p->u.ofdm.bandwidth);
tda10048_set_bandwidth(fe, p->u.ofdm.bandwidth);
}
if (fe->ops.tuner_ops.set_params) {
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
fe->ops.tuner_ops.set_params(fe, p);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
/* Enable demod TPS auto detection and begin acquisition */
tda10048_writereg(state, TDA10048_AUTO, 0x57);
return 0;
}
/* Establish sane defaults and load firmware. */
static int tda10048_init(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
struct tda10048_config *config = &state->config;
int ret = 0, i;
dprintk(1, "%s()\n", __func__);
/* Apply register defaults */
for (i = 0; i < ARRAY_SIZE(init_tab); i++)
tda10048_writereg(state, init_tab[i].reg, init_tab[i].data);
if (state->fwloaded == 0)
ret = tda10048_firmware_upload(fe);
/* Set either serial or parallel */
tda10048_output_mode(fe, config->output_mode);
/* Set inversion */
tda10048_set_inversion(fe, config->inversion);
/* Establish default RF values */
tda10048_set_if(fe, BANDWIDTH_8_MHZ);
tda10048_set_bandwidth(fe, BANDWIDTH_8_MHZ);
/* Ensure we leave the gate closed */
tda10048_i2c_gate_ctrl(fe, 0);
return ret;
}
static int tda10048_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct tda10048_state *state = fe->demodulator_priv;
u8 reg;
*status = 0;
reg = tda10048_readreg(state, TDA10048_SYNC_STATUS);
dprintk(1, "%s() status =0x%02x\n", __func__, reg);
if (reg & 0x02)
*status |= FE_HAS_CARRIER;
if (reg & 0x04)
*status |= FE_HAS_SIGNAL;
if (reg & 0x08) {
*status |= FE_HAS_LOCK;
*status |= FE_HAS_VITERBI;
*status |= FE_HAS_SYNC;
}
return 0;
}
static int tda10048_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s()\n", __func__);
/* TODO: A reset may be required here */
*ber = tda10048_readreg(state, TDA10048_CBER_MSB) << 8 |
tda10048_readreg(state, TDA10048_CBER_LSB);
return 0;
}
static int tda10048_read_signal_strength(struct dvb_frontend *fe,
u16 *signal_strength)
{
struct tda10048_state *state = fe->demodulator_priv;
u8 v;
dprintk(1, "%s()\n", __func__);
*signal_strength = 65535;
v = tda10048_readreg(state, TDA10048_NP_OUT);
if (v > 0)
*signal_strength -= (v << 8) | v;
return 0;
}
/* SNR lookup table */
static struct snr_tab {
u8 val;
u8 data;
} snr_tab[] = {
{ 0, 0 },
{ 1, 246 },
{ 2, 215 },
{ 3, 198 },
{ 4, 185 },
{ 5, 176 },
{ 6, 168 },
{ 7, 161 },
{ 8, 155 },
{ 9, 150 },
{ 10, 146 },
{ 11, 141 },
{ 12, 138 },
{ 13, 134 },
{ 14, 131 },
{ 15, 128 },
{ 16, 125 },
{ 17, 122 },
{ 18, 120 },
{ 19, 118 },
{ 20, 115 },
{ 21, 113 },
{ 22, 111 },
{ 23, 109 },
{ 24, 107 },
{ 25, 106 },
{ 26, 104 },
{ 27, 102 },
{ 28, 101 },
{ 29, 99 },
{ 30, 98 },
{ 31, 96 },
{ 32, 95 },
{ 33, 94 },
{ 34, 92 },
{ 35, 91 },
{ 36, 90 },
{ 37, 89 },
{ 38, 88 },
{ 39, 86 },
{ 40, 85 },
{ 41, 84 },
{ 42, 83 },
{ 43, 82 },
{ 44, 81 },
{ 45, 80 },
{ 46, 79 },
{ 47, 78 },
{ 48, 77 },
{ 49, 76 },
{ 50, 76 },
{ 51, 75 },
{ 52, 74 },
{ 53, 73 },
{ 54, 72 },
{ 56, 71 },
{ 57, 70 },
{ 58, 69 },
{ 60, 68 },
{ 61, 67 },
{ 63, 66 },
{ 64, 65 },
{ 66, 64 },
{ 67, 63 },
{ 68, 62 },
{ 69, 62 },
{ 70, 61 },
{ 72, 60 },
{ 74, 59 },
{ 75, 58 },
{ 77, 57 },
{ 79, 56 },
{ 81, 55 },
{ 83, 54 },
{ 85, 53 },
{ 87, 52 },
{ 89, 51 },
{ 91, 50 },
{ 93, 49 },
{ 95, 48 },
{ 97, 47 },
{ 100, 46 },
{ 102, 45 },
{ 104, 44 },
{ 107, 43 },
{ 109, 42 },
{ 112, 41 },
{ 114, 40 },
{ 117, 39 },
{ 120, 38 },
{ 123, 37 },
{ 125, 36 },
{ 128, 35 },
{ 131, 34 },
{ 134, 33 },
{ 138, 32 },
{ 141, 31 },
{ 144, 30 },
{ 147, 29 },
{ 151, 28 },
{ 154, 27 },
{ 158, 26 },
{ 162, 25 },
{ 165, 24 },
{ 169, 23 },
{ 173, 22 },
{ 177, 21 },
{ 181, 20 },
{ 186, 19 },
{ 190, 18 },
{ 194, 17 },
{ 199, 16 },
{ 204, 15 },
{ 208, 14 },
{ 213, 13 },
{ 218, 12 },
{ 223, 11 },
{ 229, 10 },
{ 234, 9 },
{ 239, 8 },
{ 245, 7 },
{ 251, 6 },
{ 255, 5 },
};
static int tda10048_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct tda10048_state *state = fe->demodulator_priv;
u8 v;
int i, ret = -EINVAL;
dprintk(1, "%s()\n", __func__);
v = tda10048_readreg(state, TDA10048_NP_OUT);
for (i = 0; i < ARRAY_SIZE(snr_tab); i++) {
if (v <= snr_tab[i].val) {
*snr = snr_tab[i].data;
ret = 0;
break;
}
}
return ret;
}
static int tda10048_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s()\n", __func__);
*ucblocks = tda10048_readreg(state, TDA10048_UNCOR_CPT_MSB) << 8 |
tda10048_readreg(state, TDA10048_UNCOR_CPT_LSB);
return 0;
}
static int tda10048_get_frontend(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s()\n", __func__);
p->inversion = tda10048_readreg(state, TDA10048_CONF_C1_1)
& 0x20 ? INVERSION_ON : INVERSION_OFF;
return tda10048_get_tps(state, &p->u.ofdm);
}
static int tda10048_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1000;
return 0;
}
static void tda10048_release(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s()\n", __func__);
kfree(state);
}
static void tda10048_establish_defaults(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
struct tda10048_config *config = &state->config;
/* Validate/default the config */
if (config->dtv6_if_freq_khz == 0) {
config->dtv6_if_freq_khz = TDA10048_IF_4300;
printk(KERN_WARNING "%s() tda10048_config.dtv6_if_freq_khz "
"is not set (defaulting to %d)\n",
__func__,
config->dtv6_if_freq_khz);
}
if (config->dtv7_if_freq_khz == 0) {
config->dtv7_if_freq_khz = TDA10048_IF_4300;
printk(KERN_WARNING "%s() tda10048_config.dtv7_if_freq_khz "
"is not set (defaulting to %d)\n",
__func__,
config->dtv7_if_freq_khz);
}
if (config->dtv8_if_freq_khz == 0) {
config->dtv8_if_freq_khz = TDA10048_IF_4300;
printk(KERN_WARNING "%s() tda10048_config.dtv8_if_freq_khz "
"is not set (defaulting to %d)\n",
__func__,
config->dtv8_if_freq_khz);
}
if (config->clk_freq_khz == 0) {
config->clk_freq_khz = TDA10048_CLK_16000;
printk(KERN_WARNING "%s() tda10048_config.clk_freq_khz "
"is not set (defaulting to %d)\n",
__func__,
config->clk_freq_khz);
}
}
static struct dvb_frontend_ops tda10048_ops;
struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
struct i2c_adapter *i2c)
{
struct tda10048_state *state = NULL;
dprintk(1, "%s()\n", __func__);
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct tda10048_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state and clone the config */
memcpy(&state->config, config, sizeof(*config));
state->i2c = i2c;
state->fwloaded = 0;
state->bandwidth = BANDWIDTH_8_MHZ;
/* check if the demod is present */
if (tda10048_readreg(state, TDA10048_IDENTITY) != 0x048)
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda10048_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
/* Establish any defaults the the user didn't pass */
tda10048_establish_defaults(&state->frontend);
/* Set the xtal and freq defaults */
if (tda10048_set_if(&state->frontend, BANDWIDTH_8_MHZ) != 0)
goto error;
/* Default bandwidth */
if (tda10048_set_bandwidth(&state->frontend, BANDWIDTH_8_MHZ) != 0)
goto error;
/* Leave the gate closed */
tda10048_i2c_gate_ctrl(&state->frontend, 0);
return &state->frontend;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(tda10048_attach);
static struct dvb_frontend_ops tda10048_ops = {
.info = {
.name = "NXP TDA10048HN DVB-T",
.type = FE_OFDM,
.frequency_min = 177000000,
.frequency_max = 858000000,
.frequency_stepsize = 166666,
.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_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
},
.release = tda10048_release,
.init = tda10048_init,
.i2c_gate_ctrl = tda10048_i2c_gate_ctrl,
.set_frontend = tda10048_set_frontend,
.get_frontend = tda10048_get_frontend,
.get_tune_settings = tda10048_get_tune_settings,
.read_status = tda10048_read_status,
.read_ber = tda10048_read_ber,
.read_signal_strength = tda10048_read_signal_strength,
.read_snr = tda10048_read_snr,
.read_ucblocks = tda10048_read_ucblocks,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable verbose debug messages");
MODULE_DESCRIPTION("NXP TDA10048HN DVB-T Demodulator driver");
MODULE_AUTHOR("Steven Toth");
MODULE_LICENSE("GPL");
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