mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-30 08:02:30 +00:00
Code Issues Releases Wiki Activity
linux-stable/drivers/media/dvb-frontends/zl10353.c
Sakari Ailus bcb63314e2 [media] media: Drop FSF's postal address from the source code files 
Drop the FSF's postal address from the source code files that typically
contain mostly the license text. Of the 628 removed instances, 578 are
outdated.

The patch has been created with the following command without manual edits:

git grep -l "675 Mass Ave\|59 Temple Place\|51 Franklin St" -- \
	drivers/media/ include/media|while read i; do i=$i perl -e '
open(F,"< $ENV{i}");
$a=join("", <F>);
$a =~ s/[ \t]*\*\n.*You should.*\n.*along with.*\n.*(\n.*USA.*$)?\n//m
	&& $a =~ s/(^.*)Or, (point your browser to) /$1To obtain the license, $2\n$1/m;
close(F);
open(F, "> $ENV{i}");
print F $a;
close(F);'; done

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
2017-01-27 11:38:09 -02:00

678 lines
16 KiB
C
Raw Blame History

/*
* Driver for Zarlink DVB-T ZL10353 demodulator
*
* Copyright (C) 2006, 2007 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
*
* 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/div64.h>
#include "dvb_frontend.h"
#include "zl10353_priv.h"
#include "zl10353.h"
struct zl10353_state {
struct i2c_adapter *i2c;
struct dvb_frontend frontend;
struct zl10353_config config;
u32 bandwidth;
u32 ucblocks;
u32 frequency;
};
static int debug;
#define dprintk(args...) \
do { \
if (debug) printk(KERN_DEBUG "zl10353: " args); \
} while (0)
static int debug_regs;
static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 buf[2] = { reg, val };
struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
.buf = buf, .len = 2 };
int err = i2c_transfer(state->i2c, &msg, 1);
if (err != 1) {
printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
return err;
}
return 0;
}
static int zl10353_write(struct dvb_frontend *fe, const u8 ibuf[], int ilen)
{
int err, i;
for (i = 0; i < ilen - 1; i++)
if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
return err;
return 0;
}
static int zl10353_read_register(struct zl10353_state *state, u8 reg)
{
int ret;
u8 b0[1] = { reg };
u8 b1[1] = { 0 };
struct i2c_msg msg[2] = { { .addr = state->config.demod_address,
.flags = 0,
.buf = b0, .len = 1 },
{ .addr = state->config.demod_address,
.flags = I2C_M_RD,
.buf = b1, .len = 1 } };
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2) {
printk("%s: readreg error (reg=%d, ret==%i)\n",
__func__, reg, ret);
return ret;
}
return b1[0];
}
static void zl10353_dump_regs(struct dvb_frontend *fe)
{
struct zl10353_state *state = fe->demodulator_priv;
int ret;
u8 reg;
/* Dump all registers. */
for (reg = 0; ; reg++) {
if (reg % 16 == 0) {
if (reg)
printk(KERN_CONT "\n");
printk(KERN_DEBUG "%02x:", reg);
}
ret = zl10353_read_register(state, reg);
if (ret >= 0)
printk(KERN_CONT " %02x", (u8)ret);
else
printk(KERN_CONT " --");
if (reg == 0xff)
break;
}
printk(KERN_CONT "\n");
}
static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
u32 bandwidth,
u16 *nominal_rate)
{
struct zl10353_state *state = fe->demodulator_priv;
u32 adc_clock = 450560; /* 45.056 MHz */
u64 value;
u8 bw = bandwidth / 1000000;
if (state->config.adc_clock)
adc_clock = state->config.adc_clock;
value = (u64)10 * (1 << 23) / 7 * 125;
value = (bw * value) + adc_clock / 2;
*nominal_rate = div_u64(value, adc_clock);
dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
__func__, bw, adc_clock, *nominal_rate);
}
static void zl10353_calc_input_freq(struct dvb_frontend *fe,
u16 *input_freq)
{
struct zl10353_state *state = fe->demodulator_priv;
u32 adc_clock = 450560; /* 45.056 MHz */
int if2 = 361667; /* 36.1667 MHz */
int ife;
u64 value;
if (state->config.adc_clock)
adc_clock = state->config.adc_clock;
if (state->config.if2)
if2 = state->config.if2;
if (adc_clock >= if2 * 2)
ife = if2;
else {
ife = adc_clock - (if2 % adc_clock);
if (ife > adc_clock / 2)
ife = adc_clock - ife;
}
value = div_u64((u64)65536 * ife + adc_clock / 2, adc_clock);
*input_freq = -value;
dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
__func__, if2, ife, adc_clock, -(int)value, *input_freq);
}
static int zl10353_sleep(struct dvb_frontend *fe)
{
static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
return 0;
}
static int zl10353_set_parameters(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
struct zl10353_state *state = fe->demodulator_priv;
u16 nominal_rate, input_freq;
u8 pllbuf[6] = { 0x67 }, acq_ctl = 0;
u16 tps = 0;
state->frequency = c->frequency;
zl10353_single_write(fe, RESET, 0x80);
udelay(200);
zl10353_single_write(fe, 0xEA, 0x01);
udelay(200);
zl10353_single_write(fe, 0xEA, 0x00);
zl10353_single_write(fe, AGC_TARGET, 0x28);
if (c->transmission_mode != TRANSMISSION_MODE_AUTO)
acq_ctl |= (1 << 0);
if (c->guard_interval != GUARD_INTERVAL_AUTO)
acq_ctl |= (1 << 1);
zl10353_single_write(fe, ACQ_CTL, acq_ctl);
switch (c->bandwidth_hz) {
case 6000000:
/* These are extrapolated from the 7 and 8MHz values */
zl10353_single_write(fe, MCLK_RATIO, 0x97);
zl10353_single_write(fe, 0x64, 0x34);
zl10353_single_write(fe, 0xcc, 0xdd);
break;
case 7000000:
zl10353_single_write(fe, MCLK_RATIO, 0x86);
zl10353_single_write(fe, 0x64, 0x35);
zl10353_single_write(fe, 0xcc, 0x73);
break;
default:
c->bandwidth_hz = 8000000;
/* fall though */
case 8000000:
zl10353_single_write(fe, MCLK_RATIO, 0x75);
zl10353_single_write(fe, 0x64, 0x36);
zl10353_single_write(fe, 0xcc, 0x73);
}
zl10353_calc_nominal_rate(fe, c->bandwidth_hz, &nominal_rate);
zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate));
zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate));
state->bandwidth = c->bandwidth_hz;
zl10353_calc_input_freq(fe, &input_freq);
zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq));
zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq));
/* Hint at TPS settings */
switch (c->code_rate_HP) {
case FEC_2_3:
tps |= (1 << 7);
break;
case FEC_3_4:
tps |= (2 << 7);
break;
case FEC_5_6:
tps |= (3 << 7);
break;
case FEC_7_8:
tps |= (4 << 7);
break;
case FEC_1_2:
case FEC_AUTO:
break;
default:
return -EINVAL;
}
switch (c->code_rate_LP) {
case FEC_2_3:
tps |= (1 << 4);
break;
case FEC_3_4:
tps |= (2 << 4);
break;
case FEC_5_6:
tps |= (3 << 4);
break;
case FEC_7_8:
tps |= (4 << 4);
break;
case FEC_1_2:
case FEC_AUTO:
break;
case FEC_NONE:
if (c->hierarchy == HIERARCHY_AUTO ||
c->hierarchy == HIERARCHY_NONE)
break;
default:
return -EINVAL;
}
switch (c->modulation) {
case QPSK:
break;
case QAM_AUTO:
case QAM_16:
tps |= (1 << 13);
break;
case QAM_64:
tps |= (2 << 13);
break;
default:
return -EINVAL;
}
switch (c->transmission_mode) {
case TRANSMISSION_MODE_2K:
case TRANSMISSION_MODE_AUTO:
break;
case TRANSMISSION_MODE_8K:
tps |= (1 << 0);
break;
default:
return -EINVAL;
}
switch (c->guard_interval) {
case GUARD_INTERVAL_1_32:
case GUARD_INTERVAL_AUTO:
break;
case GUARD_INTERVAL_1_16:
tps |= (1 << 2);
break;
case GUARD_INTERVAL_1_8:
tps |= (2 << 2);
break;
case GUARD_INTERVAL_1_4:
tps |= (3 << 2);
break;
default:
return -EINVAL;
}
switch (c->hierarchy) {
case HIERARCHY_AUTO:
case HIERARCHY_NONE:
break;
case HIERARCHY_1:
tps |= (1 << 10);
break;
case HIERARCHY_2:
tps |= (2 << 10);
break;
case HIERARCHY_4:
tps |= (3 << 10);
break;
default:
return -EINVAL;
}
zl10353_single_write(fe, TPS_GIVEN_1, msb(tps));
zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps));
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
/*
* If there is no tuner attached to the secondary I2C bus, we call
* set_params to program a potential tuner attached somewhere else.
* Otherwise, we update the PLL registers via calc_regs.
*/
if (state->config.no_tuner) {
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);
}
} else if (fe->ops.tuner_ops.calc_regs) {
fe->ops.tuner_ops.calc_regs(fe, pllbuf + 1, 5);
pllbuf[1] <<= 1;
zl10353_write(fe, pllbuf, sizeof(pllbuf));
}
zl10353_single_write(fe, 0x5F, 0x13);
/* If no attached tuner or invalid PLL registers, just start the FSM. */
if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL)
zl10353_single_write(fe, FSM_GO, 0x01);
else
zl10353_single_write(fe, TUNER_GO, 0x01);
return 0;
}
static int zl10353_get_parameters(struct dvb_frontend *fe,
struct dtv_frontend_properties *c)
{
struct zl10353_state *state = fe->demodulator_priv;
int s6, s9;
u16 tps;
static const u8 tps_fec_to_api[8] = {
FEC_1_2,
FEC_2_3,
FEC_3_4,
FEC_5_6,
FEC_7_8,
FEC_AUTO,
FEC_AUTO,
FEC_AUTO
};
s6 = zl10353_read_register(state, STATUS_6);
s9 = zl10353_read_register(state, STATUS_9);
if (s6 < 0 || s9 < 0)
return -EREMOTEIO;
if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0)
return -EINVAL; /* no FE or TPS lock */
tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 |
zl10353_read_register(state, TPS_RECEIVED_0);
c->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];
c->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];
switch ((tps >> 13) & 3) {
case 0:
c->modulation = QPSK;
break;
case 1:
c->modulation = QAM_16;
break;
case 2:
c->modulation = QAM_64;
break;
default:
c->modulation = QAM_AUTO;
break;
}
c->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K :
TRANSMISSION_MODE_2K;
switch ((tps >> 2) & 3) {
case 0:
c->guard_interval = GUARD_INTERVAL_1_32;
break;
case 1:
c->guard_interval = GUARD_INTERVAL_1_16;
break;
case 2:
c->guard_interval = GUARD_INTERVAL_1_8;
break;
case 3:
c->guard_interval = GUARD_INTERVAL_1_4;
break;
default:
c->guard_interval = GUARD_INTERVAL_AUTO;
break;
}
switch ((tps >> 10) & 7) {
case 0:
c->hierarchy = HIERARCHY_NONE;
break;
case 1:
c->hierarchy = HIERARCHY_1;
break;
case 2:
c->hierarchy = HIERARCHY_2;
break;
case 3:
c->hierarchy = HIERARCHY_4;
break;
default:
c->hierarchy = HIERARCHY_AUTO;
break;
}
c->frequency = state->frequency;
c->bandwidth_hz = state->bandwidth;
c->inversion = INVERSION_AUTO;
return 0;
}
static int zl10353_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct zl10353_state *state = fe->demodulator_priv;
int s6, s7, s8;
if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
return -EREMOTEIO;
if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
return -EREMOTEIO;
if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
return -EREMOTEIO;
*status = 0;
if (s6 & (1 << 2))
*status |= FE_HAS_CARRIER;
if (s6 & (1 << 1))
*status |= FE_HAS_VITERBI;
if (s6 & (1 << 5))
*status |= FE_HAS_LOCK;
if (s7 & (1 << 4))
*status |= FE_HAS_SYNC;
if (s8 & (1 << 6))
*status |= FE_HAS_SIGNAL;
if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
(FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
*status &= ~FE_HAS_LOCK;
return 0;
}
static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct zl10353_state *state = fe->demodulator_priv;
*ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 |
zl10353_read_register(state, RS_ERR_CNT_1) << 8 |
zl10353_read_register(state, RS_ERR_CNT_0);
return 0;
}
static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct zl10353_state *state = fe->demodulator_priv;
u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 |
zl10353_read_register(state, AGC_GAIN_0) << 2 | 3;
*strength = ~signal;
return 0;
}
static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 _snr;
if (debug_regs)
zl10353_dump_regs(fe);
_snr = zl10353_read_register(state, SNR);
*snr = 10 * _snr / 8;
return 0;
}
static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct zl10353_state *state = fe->demodulator_priv;
u32 ubl = 0;
ubl = zl10353_read_register(state, RS_UBC_1) << 8 |
zl10353_read_register(state, RS_UBC_0);
state->ucblocks += ubl;
*ucblocks = state->ucblocks;
return 0;
}
static int zl10353_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings
*fe_tune_settings)
{
fe_tune_settings->min_delay_ms = 1000;
fe_tune_settings->step_size = 0;
fe_tune_settings->max_drift = 0;
return 0;
}
static int zl10353_init(struct dvb_frontend *fe)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
if (debug_regs)
zl10353_dump_regs(fe);
if (state->config.parallel_ts)
zl10353_reset_attach[2] &= ~0x20;
if (state->config.clock_ctl_1)
zl10353_reset_attach[3] = state->config.clock_ctl_1;
if (state->config.pll_0)
zl10353_reset_attach[4] = state->config.pll_0;
/* Do a "hard" reset if not already done */
if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] ||
zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) {
zl10353_write(fe, zl10353_reset_attach,
sizeof(zl10353_reset_attach));
if (debug_regs)
zl10353_dump_regs(fe);
}
return 0;
}
static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
struct zl10353_state *state = fe->demodulator_priv;
u8 val = 0x0a;
if (state->config.disable_i2c_gate_ctrl) {
/* No tuner attached to the internal I2C bus */
/* If set enable I2C bridge, the main I2C bus stopped hardly */
return 0;
}
if (enable)
val |= 0x10;
return zl10353_single_write(fe, 0x62, val);
}
static void zl10353_release(struct dvb_frontend *fe)
{
struct zl10353_state *state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops zl10353_ops;
struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
struct i2c_adapter *i2c)
{
struct zl10353_state *state = NULL;
int id;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->i2c = i2c;
memcpy(&state->config, config, sizeof(struct zl10353_config));
/* check if the demod is there */
id = zl10353_read_register(state, CHIP_ID);
if ((id != ID_ZL10353) && (id != ID_CE6230) && (id != ID_CE6231))
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static const struct dvb_frontend_ops zl10353_ops = {
.delsys = { SYS_DVBT },
.info = {
.name = "Zarlink ZL10353 DVB-T",
.frequency_min = 174000000,
.frequency_max = 862000000,
.frequency_stepsize = 166667,
.frequency_tolerance = 0,
.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_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
FE_CAN_MUTE_TS
},
.release = zl10353_release,
.init = zl10353_init,
.sleep = zl10353_sleep,
.i2c_gate_ctrl = zl10353_i2c_gate_ctrl,
.write = zl10353_write,
.set_frontend = zl10353_set_parameters,
.get_frontend = zl10353_get_parameters,
.get_tune_settings = zl10353_get_tune_settings,
.read_status = zl10353_read_status,
.read_ber = zl10353_read_ber,
.read_signal_strength = zl10353_read_signal_strength,
.read_snr = zl10353_read_snr,
.read_ucblocks = zl10353_read_ucblocks,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
module_param(debug_regs, int, 0644);
MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
MODULE_AUTHOR("Chris Pascoe");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(zl10353_attach);
Reference in a new issue View git blame Copy permalink