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linux/drivers/media/dvb-frontends/tda10086.c
Greg Kroah-Hartman 86495af117 media: dvb: symbol fixup for dvb_attach() 
In commit 9011e49d54 ("modules: only allow symbol_get of
EXPORT_SYMBOL_GPL modules") the use of symbol_get is properly restricted
to GPL-only marked symbols.  This interacts oddly with the DVB logic
which only uses dvb_attach() to load the dvb driver which then uses
symbol_get().

Fix this up by properly marking all of the dvb_attach attach symbols as
EXPORT_SYMBOL_GPL().

Fixes: 9011e49d54 ("modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules")
Cc: stable <stable@kernel.org>
Reported-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: linux-media@vger.kernel.org
Cc: linux-modules@vger.kernel.org
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Link: https://lore.kernel.org/r/20230908092035.3815268-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-09-09 08:15:11 +01:00

768 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
Driver for Philips tda10086 DVBS Demodulator
(c) 2006 Andrew de Quincey
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/jiffies.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <media/dvb_frontend.h>
#include "tda10086.h"
#define SACLK 96000000U
struct tda10086_state {
struct i2c_adapter* i2c;
const struct tda10086_config* config;
struct dvb_frontend frontend;
/* private demod data */
u32 frequency;
u32 symbol_rate;
bool has_lock;
};
static int debug;
#define dprintk(args...) \
do { \
if (debug) printk(KERN_DEBUG "tda10086: " args); \
} while (0)
static int tda10086_write_byte(struct tda10086_state *state, int reg, int data)
{
int ret;
u8 b0[] = { reg, data };
struct i2c_msg msg = { .flags = 0, .buf = b0, .len = 2 };
msg.addr = state->config->demod_address;
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1)
dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
__func__, reg, data, ret);
return (ret != 1) ? ret : 0;
}
static int tda10086_read_byte(struct tda10086_state *state, int reg)
{
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {{ .flags = 0, .buf = b0, .len = 1 },
{ .flags = I2C_M_RD, .buf = b1, .len = 1 }};
msg[0].addr = state->config->demod_address;
msg[1].addr = state->config->demod_address;
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2) {
dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg,
ret);
return ret;
}
return b1[0];
}
static int tda10086_write_mask(struct tda10086_state *state, int reg, int mask, int data)
{
int val;
/* read a byte and check */
val = tda10086_read_byte(state, reg);
if (val < 0)
return val;
/* mask if off */
val = val & ~mask;
val |= data & 0xff;
/* write it out again */
return tda10086_write_byte(state, reg, val);
}
static int tda10086_init(struct dvb_frontend* fe)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 t22k_off = 0x80;
dprintk ("%s\n", __func__);
if (state->config->diseqc_tone)
t22k_off = 0;
/* reset */
tda10086_write_byte(state, 0x00, 0x00);
msleep(10);
/* misc setup */
tda10086_write_byte(state, 0x01, 0x94);
tda10086_write_byte(state, 0x02, 0x35); /* NOTE: TT drivers appear to disable CSWP */
tda10086_write_byte(state, 0x03, 0xe4);
tda10086_write_byte(state, 0x04, 0x43);
tda10086_write_byte(state, 0x0c, 0x0c);
tda10086_write_byte(state, 0x1b, 0xb0); /* noise threshold */
tda10086_write_byte(state, 0x20, 0x89); /* misc */
tda10086_write_byte(state, 0x30, 0x04); /* acquisition period length */
tda10086_write_byte(state, 0x32, 0x00); /* irq off */
tda10086_write_byte(state, 0x31, 0x56); /* setup AFC */
/* setup PLL (this assumes SACLK = 96MHz) */
tda10086_write_byte(state, 0x55, 0x2c); /* misc PLL setup */
if (state->config->xtal_freq == TDA10086_XTAL_16M) {
tda10086_write_byte(state, 0x3a, 0x0b); /* M=12 */
tda10086_write_byte(state, 0x3b, 0x01); /* P=2 */
} else {
tda10086_write_byte(state, 0x3a, 0x17); /* M=24 */
tda10086_write_byte(state, 0x3b, 0x00); /* P=1 */
}
tda10086_write_mask(state, 0x55, 0x20, 0x00); /* powerup PLL */
/* setup TS interface */
tda10086_write_byte(state, 0x11, 0x81);
tda10086_write_byte(state, 0x12, 0x81);
tda10086_write_byte(state, 0x19, 0x40); /* parallel mode A + MSBFIRST */
tda10086_write_byte(state, 0x56, 0x80); /* powerdown WPLL - unused in the mode we use */
tda10086_write_byte(state, 0x57, 0x08); /* bypass WPLL - unused in the mode we use */
tda10086_write_byte(state, 0x10, 0x2a);
/* setup ADC */
tda10086_write_byte(state, 0x58, 0x61); /* ADC setup */
tda10086_write_mask(state, 0x58, 0x01, 0x00); /* powerup ADC */
/* setup AGC */
tda10086_write_byte(state, 0x05, 0x0B);
tda10086_write_byte(state, 0x37, 0x63);
tda10086_write_byte(state, 0x3f, 0x0a); /* NOTE: flydvb varies it */
tda10086_write_byte(state, 0x40, 0x64);
tda10086_write_byte(state, 0x41, 0x4f);
tda10086_write_byte(state, 0x42, 0x43);
/* setup viterbi */
tda10086_write_byte(state, 0x1a, 0x11); /* VBER 10^6, DVB, QPSK */
/* setup carrier recovery */
tda10086_write_byte(state, 0x3d, 0x80);
/* setup SEC */
tda10086_write_byte(state, 0x36, t22k_off); /* all SEC off, 22k tone */
tda10086_write_byte(state, 0x34, (((1<<19) * (22000/1000)) / (SACLK/1000)));
tda10086_write_byte(state, 0x35, (((1<<19) * (22000/1000)) / (SACLK/1000)) >> 8);
return 0;
}
static void tda10086_diseqc_wait(struct tda10086_state *state)
{
unsigned long timeout = jiffies + msecs_to_jiffies(200);
while (!(tda10086_read_byte(state, 0x50) & 0x01)) {
if(time_after(jiffies, timeout)) {
printk("%s: diseqc queue not ready, command may be lost.\n", __func__);
break;
}
msleep(10);
}
}
static int tda10086_set_tone(struct dvb_frontend *fe,
enum fe_sec_tone_mode tone)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 t22k_off = 0x80;
dprintk ("%s\n", __func__);
if (state->config->diseqc_tone)
t22k_off = 0;
switch (tone) {
case SEC_TONE_OFF:
tda10086_write_byte(state, 0x36, t22k_off);
break;
case SEC_TONE_ON:
tda10086_write_byte(state, 0x36, 0x01 + t22k_off);
break;
}
return 0;
}
static int tda10086_send_master_cmd (struct dvb_frontend* fe,
struct dvb_diseqc_master_cmd* cmd)
{
struct tda10086_state* state = fe->demodulator_priv;
int i;
u8 oldval;
u8 t22k_off = 0x80;
dprintk ("%s\n", __func__);
if (state->config->diseqc_tone)
t22k_off = 0;
if (cmd->msg_len > 6)
return -EINVAL;
oldval = tda10086_read_byte(state, 0x36);
for(i=0; i< cmd->msg_len; i++) {
tda10086_write_byte(state, 0x48+i, cmd->msg[i]);
}
tda10086_write_byte(state, 0x36, (0x08 + t22k_off)
| ((cmd->msg_len - 1) << 4));
tda10086_diseqc_wait(state);
tda10086_write_byte(state, 0x36, oldval);
return 0;
}
static int tda10086_send_burst(struct dvb_frontend *fe,
enum fe_sec_mini_cmd minicmd)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 oldval = tda10086_read_byte(state, 0x36);
u8 t22k_off = 0x80;
dprintk ("%s\n", __func__);
if (state->config->diseqc_tone)
t22k_off = 0;
switch(minicmd) {
case SEC_MINI_A:
tda10086_write_byte(state, 0x36, 0x04 + t22k_off);
break;
case SEC_MINI_B:
tda10086_write_byte(state, 0x36, 0x06 + t22k_off);
break;
}
tda10086_diseqc_wait(state);
tda10086_write_byte(state, 0x36, oldval);
return 0;
}
static int tda10086_set_inversion(struct tda10086_state *state,
struct dtv_frontend_properties *fe_params)
{
u8 invval = 0x80;
dprintk ("%s %i %i\n", __func__, fe_params->inversion, state->config->invert);
switch(fe_params->inversion) {
case INVERSION_OFF:
if (state->config->invert)
invval = 0x40;
break;
case INVERSION_ON:
if (!state->config->invert)
invval = 0x40;
break;
case INVERSION_AUTO:
invval = 0x00;
break;
}
tda10086_write_mask(state, 0x0c, 0xc0, invval);
return 0;
}
static int tda10086_set_symbol_rate(struct tda10086_state *state,
struct dtv_frontend_properties *fe_params)
{
u8 dfn = 0;
u8 afs = 0;
u8 byp = 0;
u8 reg37 = 0x43;
u8 reg42 = 0x43;
u64 big;
u32 tmp;
u32 bdr;
u32 bdri;
u32 symbol_rate = fe_params->symbol_rate;
dprintk ("%s %i\n", __func__, symbol_rate);
/* setup the decimation and anti-aliasing filters.. */
if (symbol_rate < SACLK / 10000 * 137) {
dfn=4;
afs=1;
} else if (symbol_rate < SACLK / 10000 * 208) {
dfn=4;
afs=0;
} else if (symbol_rate < SACLK / 10000 * 270) {
dfn=3;
afs=1;
} else if (symbol_rate < SACLK / 10000 * 416) {
dfn=3;
afs=0;
} else if (symbol_rate < SACLK / 10000 * 550) {
dfn=2;
afs=1;
} else if (symbol_rate < SACLK / 10000 * 833) {
dfn=2;
afs=0;
} else if (symbol_rate < SACLK / 10000 * 1100) {
dfn=1;
afs=1;
} else if (symbol_rate < SACLK / 10000 * 1666) {
dfn=1;
afs=0;
} else if (symbol_rate < SACLK / 10000 * 2200) {
dfn=0;
afs=1;
} else if (symbol_rate < SACLK / 10000 * 3333) {
dfn=0;
afs=0;
} else {
reg37 = 0x63;
reg42 = 0x4f;
byp=1;
}
/* calculate BDR */
big = (1ULL<<21) * ((u64) symbol_rate/1000ULL) * (1ULL<<dfn);
big += ((SACLK/1000ULL)-1ULL);
do_div(big, (SACLK/1000ULL));
bdr = big & 0xfffff;
/* calculate BDRI */
tmp = (1<<dfn)*(symbol_rate/1000);
bdri = ((32 * (SACLK/1000)) + (tmp-1)) / tmp;
tda10086_write_byte(state, 0x21, (afs << 7) | dfn);
tda10086_write_mask(state, 0x20, 0x08, byp << 3);
tda10086_write_byte(state, 0x06, bdr);
tda10086_write_byte(state, 0x07, bdr >> 8);
tda10086_write_byte(state, 0x08, bdr >> 16);
tda10086_write_byte(state, 0x09, bdri);
tda10086_write_byte(state, 0x37, reg37);
tda10086_write_byte(state, 0x42, reg42);
return 0;
}
static int tda10086_set_fec(struct tda10086_state *state,
struct dtv_frontend_properties *fe_params)
{
u8 fecval;
dprintk("%s %i\n", __func__, fe_params->fec_inner);
switch (fe_params->fec_inner) {
case FEC_1_2:
fecval = 0x00;
break;
case FEC_2_3:
fecval = 0x01;
break;
case FEC_3_4:
fecval = 0x02;
break;
case FEC_4_5:
fecval = 0x03;
break;
case FEC_5_6:
fecval = 0x04;
break;
case FEC_6_7:
fecval = 0x05;
break;
case FEC_7_8:
fecval = 0x06;
break;
case FEC_8_9:
fecval = 0x07;
break;
case FEC_AUTO:
fecval = 0x08;
break;
default:
return -1;
}
tda10086_write_byte(state, 0x0d, fecval);
return 0;
}
static int tda10086_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
struct tda10086_state *state = fe->demodulator_priv;
int ret;
u32 freq = 0;
int freqoff;
dprintk ("%s\n", __func__);
/* modify parameters for tuning */
tda10086_write_byte(state, 0x02, 0x35);
state->has_lock = false;
/* set params */
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);
if (fe->ops.tuner_ops.get_frequency)
fe->ops.tuner_ops.get_frequency(fe, &freq);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
/* calculate the frequency offset (in *Hz* not kHz) */
freqoff = fe_params->frequency - freq;
freqoff = ((1<<16) * freqoff) / (SACLK/1000);
tda10086_write_byte(state, 0x3d, 0x80 | ((freqoff >> 8) & 0x7f));
tda10086_write_byte(state, 0x3e, freqoff);
if ((ret = tda10086_set_inversion(state, fe_params)) < 0)
return ret;
if ((ret = tda10086_set_symbol_rate(state, fe_params)) < 0)
return ret;
if ((ret = tda10086_set_fec(state, fe_params)) < 0)
return ret;
/* soft reset + disable TS output until lock */
tda10086_write_mask(state, 0x10, 0x40, 0x40);
tda10086_write_mask(state, 0x00, 0x01, 0x00);
state->symbol_rate = fe_params->symbol_rate;
state->frequency = fe_params->frequency;
return 0;
}
static int tda10086_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *fe_params)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 val;
int tmp;
u64 tmp64;
dprintk ("%s\n", __func__);
/* check for invalid symbol rate */
if (fe_params->symbol_rate < 500000)
return -EINVAL;
/* calculate the updated frequency (note: we convert from Hz->kHz) */
tmp64 = ((u64)tda10086_read_byte(state, 0x52)
| (tda10086_read_byte(state, 0x51) << 8));
if (tmp64 & 0x8000)
tmp64 |= 0xffffffffffff0000ULL;
tmp64 = (tmp64 * (SACLK/1000ULL));
do_div(tmp64, (1ULL<<15) * (1ULL<<1));
fe_params->frequency = (int) state->frequency + (int) tmp64;
/* the inversion */
val = tda10086_read_byte(state, 0x0c);
if (val & 0x80) {
switch(val & 0x40) {
case 0x00:
fe_params->inversion = INVERSION_OFF;
if (state->config->invert)
fe_params->inversion = INVERSION_ON;
break;
default:
fe_params->inversion = INVERSION_ON;
if (state->config->invert)
fe_params->inversion = INVERSION_OFF;
break;
}
} else {
tda10086_read_byte(state, 0x0f);
switch(val & 0x02) {
case 0x00:
fe_params->inversion = INVERSION_OFF;
if (state->config->invert)
fe_params->inversion = INVERSION_ON;
break;
default:
fe_params->inversion = INVERSION_ON;
if (state->config->invert)
fe_params->inversion = INVERSION_OFF;
break;
}
}
/* calculate the updated symbol rate */
tmp = tda10086_read_byte(state, 0x1d);
if (tmp & 0x80)
tmp |= 0xffffff00;
tmp = (tmp * 480 * (1<<1)) / 128;
tmp = ((state->symbol_rate/1000) * tmp) / (1000000/1000);
fe_params->symbol_rate = state->symbol_rate + tmp;
/* the FEC */
val = (tda10086_read_byte(state, 0x0d) & 0x70) >> 4;
switch(val) {
case 0x00:
fe_params->fec_inner = FEC_1_2;
break;
case 0x01:
fe_params->fec_inner = FEC_2_3;
break;
case 0x02:
fe_params->fec_inner = FEC_3_4;
break;
case 0x03:
fe_params->fec_inner = FEC_4_5;
break;
case 0x04:
fe_params->fec_inner = FEC_5_6;
break;
case 0x05:
fe_params->fec_inner = FEC_6_7;
break;
case 0x06:
fe_params->fec_inner = FEC_7_8;
break;
case 0x07:
fe_params->fec_inner = FEC_8_9;
break;
}
return 0;
}
static int tda10086_read_status(struct dvb_frontend *fe,
enum fe_status *fe_status)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 val;
dprintk ("%s\n", __func__);
val = tda10086_read_byte(state, 0x0e);
*fe_status = 0;
if (val & 0x01)
*fe_status |= FE_HAS_SIGNAL;
if (val & 0x02)
*fe_status |= FE_HAS_CARRIER;
if (val & 0x04)
*fe_status |= FE_HAS_VITERBI;
if (val & 0x08)
*fe_status |= FE_HAS_SYNC;
if (val & 0x10) {
*fe_status |= FE_HAS_LOCK;
if (!state->has_lock) {
state->has_lock = true;
/* modify parameters for stable reception */
tda10086_write_byte(state, 0x02, 0x00);
}
}
return 0;
}
static int tda10086_read_signal_strength(struct dvb_frontend* fe, u16 * signal)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 _str;
dprintk ("%s\n", __func__);
_str = 0xff - tda10086_read_byte(state, 0x43);
*signal = (_str << 8) | _str;
return 0;
}
static int tda10086_read_snr(struct dvb_frontend* fe, u16 * snr)
{
struct tda10086_state* state = fe->demodulator_priv;
u8 _snr;
dprintk ("%s\n", __func__);
_snr = 0xff - tda10086_read_byte(state, 0x1c);
*snr = (_snr << 8) | _snr;
return 0;
}
static int tda10086_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
struct tda10086_state* state = fe->demodulator_priv;
dprintk ("%s\n", __func__);
/* read it */
*ucblocks = tda10086_read_byte(state, 0x18) & 0x7f;
/* reset counter */
tda10086_write_byte(state, 0x18, 0x00);
tda10086_write_byte(state, 0x18, 0x80);
return 0;
}
static int tda10086_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct tda10086_state* state = fe->demodulator_priv;
dprintk ("%s\n", __func__);
/* read it */
*ber = 0;
*ber |= tda10086_read_byte(state, 0x15);
*ber |= tda10086_read_byte(state, 0x16) << 8;
*ber |= (tda10086_read_byte(state, 0x17) & 0xf) << 16;
return 0;
}
static int tda10086_sleep(struct dvb_frontend* fe)
{
struct tda10086_state* state = fe->demodulator_priv;
dprintk ("%s\n", __func__);
tda10086_write_mask(state, 0x00, 0x08, 0x08);
return 0;
}
static int tda10086_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct tda10086_state* state = fe->demodulator_priv;
dprintk ("%s\n", __func__);
if (enable) {
tda10086_write_mask(state, 0x00, 0x10, 0x10);
} else {
tda10086_write_mask(state, 0x00, 0x10, 0x00);
}
return 0;
}
static int tda10086_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
if (p->symbol_rate > 20000000) {
fesettings->min_delay_ms = 50;
fesettings->step_size = 2000;
fesettings->max_drift = 8000;
} else if (p->symbol_rate > 12000000) {
fesettings->min_delay_ms = 100;
fesettings->step_size = 1500;
fesettings->max_drift = 9000;
} else if (p->symbol_rate > 8000000) {
fesettings->min_delay_ms = 100;
fesettings->step_size = 1000;
fesettings->max_drift = 8000;
} else if (p->symbol_rate > 4000000) {
fesettings->min_delay_ms = 100;
fesettings->step_size = 500;
fesettings->max_drift = 7000;
} else if (p->symbol_rate > 2000000) {
fesettings->min_delay_ms = 200;
fesettings->step_size = p->symbol_rate / 8000;
fesettings->max_drift = 14 * fesettings->step_size;
} else {
fesettings->min_delay_ms = 200;
fesettings->step_size = p->symbol_rate / 8000;
fesettings->max_drift = 18 * fesettings->step_size;
}
return 0;
}
static void tda10086_release(struct dvb_frontend* fe)
{
struct tda10086_state *state = fe->demodulator_priv;
tda10086_sleep(fe);
kfree(state);
}
static const struct dvb_frontend_ops tda10086_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "Philips TDA10086 DVB-S",
.frequency_min_hz = 950 * MHz,
.frequency_max_hz = 2150 * MHz,
.frequency_stepsize_hz = 125 * kHz,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
.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_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK
},
.release = tda10086_release,
.init = tda10086_init,
.sleep = tda10086_sleep,
.i2c_gate_ctrl = tda10086_i2c_gate_ctrl,
.set_frontend = tda10086_set_frontend,
.get_frontend = tda10086_get_frontend,
.get_tune_settings = tda10086_get_tune_settings,
.read_status = tda10086_read_status,
.read_ber = tda10086_read_ber,
.read_signal_strength = tda10086_read_signal_strength,
.read_snr = tda10086_read_snr,
.read_ucblocks = tda10086_read_ucblocks,
.diseqc_send_master_cmd = tda10086_send_master_cmd,
.diseqc_send_burst = tda10086_send_burst,
.set_tone = tda10086_set_tone,
};
struct dvb_frontend* tda10086_attach(const struct tda10086_config* config,
struct i2c_adapter* i2c)
{
struct tda10086_state *state;
dprintk ("%s\n", __func__);
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct tda10086_state), GFP_KERNEL);
if (!state)
return NULL;
/* setup the state */
state->config = config;
state->i2c = i2c;
/* check if the demod is there */
if (tda10086_read_byte(state, 0x1e) != 0xe1) {
kfree(state);
return NULL;
}
/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda10086_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("Philips TDA10086 DVB-S Demodulator");
MODULE_AUTHOR("Andrew de Quincey");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL_GPL(tda10086_attach);
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