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linux/drivers/media/dvb-frontends/stv0288.c
Thomas Gleixner 74ba9207e1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 441 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24 17:36:45 +02:00

607 lines
13 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
Driver for ST STV0288 demodulator
Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
for Reel Multimedia
Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
Removed stb6000 specific tuner code and revised some
procedures.
2010-09-01 Josef Pavlik <josef@pavlik.it>
Fixed diseqc_msg, diseqc_burst and set_tone problems
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <asm/div64.h>
#include <media/dvb_frontend.h>
#include "stv0288.h"
struct stv0288_state {
struct i2c_adapter *i2c;
const struct stv0288_config *config;
struct dvb_frontend frontend;
u8 initialised:1;
u32 tuner_frequency;
u32 symbol_rate;
enum fe_code_rate fec_inner;
int errmode;
};
#define STATUS_BER 0
#define STATUS_UCBLOCKS 1
static int debug;
static int debug_legacy_dish_switch;
#define dprintk(args...) \
do { \
if (debug) \
printk(KERN_DEBUG "stv0288: " args); \
} while (0)
static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
{
int ret;
u8 buf[] = { reg, data };
struct i2c_msg msg = {
.addr = state->config->demod_address,
.flags = 0,
.buf = buf,
.len = 2
};
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1)
dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
__func__, reg, data, ret);
return (ret != 1) ? -EREMOTEIO : 0;
}
static int stv0288_write(struct dvb_frontend *fe, const u8 buf[], int len)
{
struct stv0288_state *state = fe->demodulator_priv;
if (len != 2)
return -EINVAL;
return stv0288_writeregI(state, buf[0], buf[1]);
}
static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
{
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {
{
.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)
dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
__func__, reg, ret);
return b1[0];
}
static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
{
struct stv0288_state *state = fe->demodulator_priv;
unsigned int temp;
unsigned char b[3];
if ((srate < 1000000) || (srate > 45000000))
return -EINVAL;
stv0288_writeregI(state, 0x22, 0);
stv0288_writeregI(state, 0x23, 0);
stv0288_writeregI(state, 0x2b, 0xff);
stv0288_writeregI(state, 0x2c, 0xf7);
temp = (unsigned int)srate / 1000;
temp = temp * 32768;
temp = temp / 25;
temp = temp / 125;
b[0] = (unsigned char)((temp >> 12) & 0xff);
b[1] = (unsigned char)((temp >> 4) & 0xff);
b[2] = (unsigned char)((temp << 4) & 0xf0);
stv0288_writeregI(state, 0x28, 0x80); /* SFRH */
stv0288_writeregI(state, 0x29, 0); /* SFRM */
stv0288_writeregI(state, 0x2a, 0); /* SFRL */
stv0288_writeregI(state, 0x28, b[0]);
stv0288_writeregI(state, 0x29, b[1]);
stv0288_writeregI(state, 0x2a, b[2]);
dprintk("stv0288: stv0288_set_symbolrate\n");
return 0;
}
static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
struct dvb_diseqc_master_cmd *m)
{
struct stv0288_state *state = fe->demodulator_priv;
int i;
dprintk("%s\n", __func__);
stv0288_writeregI(state, 0x09, 0);
msleep(30);
stv0288_writeregI(state, 0x05, 0x12);/* modulated mode, single shot */
for (i = 0; i < m->msg_len; i++) {
if (stv0288_writeregI(state, 0x06, m->msg[i]))
return -EREMOTEIO;
}
msleep(m->msg_len*12);
return 0;
}
static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
enum fe_sec_mini_cmd burst)
{
struct stv0288_state *state = fe->demodulator_priv;
dprintk("%s\n", __func__);
if (stv0288_writeregI(state, 0x05, 0x03))/* burst mode, single shot */
return -EREMOTEIO;
if (stv0288_writeregI(state, 0x06, burst == SEC_MINI_A ? 0x00 : 0xff))
return -EREMOTEIO;
msleep(15);
if (stv0288_writeregI(state, 0x05, 0x12))
return -EREMOTEIO;
return 0;
}
static int stv0288_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
{
struct stv0288_state *state = fe->demodulator_priv;
switch (tone) {
case SEC_TONE_ON:
if (stv0288_writeregI(state, 0x05, 0x10))/* cont carrier */
return -EREMOTEIO;
break;
case SEC_TONE_OFF:
if (stv0288_writeregI(state, 0x05, 0x12))/* burst mode off*/
return -EREMOTEIO;
break;
default:
return -EINVAL;
}
return 0;
}
static u8 stv0288_inittab[] = {
0x01, 0x15,
0x02, 0x20,
0x09, 0x0,
0x0a, 0x4,
0x0b, 0x0,
0x0c, 0x0,
0x0d, 0x0,
0x0e, 0xd4,
0x0f, 0x30,
0x11, 0x80,
0x12, 0x03,
0x13, 0x48,
0x14, 0x84,
0x15, 0x45,
0x16, 0xb7,
0x17, 0x9c,
0x18, 0x0,
0x19, 0xa6,
0x1a, 0x88,
0x1b, 0x8f,
0x1c, 0xf0,
0x20, 0x0b,
0x21, 0x54,
0x22, 0x0,
0x23, 0x0,
0x2b, 0xff,
0x2c, 0xf7,
0x30, 0x0,
0x31, 0x1e,
0x32, 0x14,
0x33, 0x0f,
0x34, 0x09,
0x35, 0x0c,
0x36, 0x05,
0x37, 0x2f,
0x38, 0x16,
0x39, 0xbe,
0x3a, 0x0,
0x3b, 0x13,
0x3c, 0x11,
0x3d, 0x30,
0x40, 0x63,
0x41, 0x04,
0x42, 0x20,
0x43, 0x00,
0x44, 0x00,
0x45, 0x00,
0x46, 0x00,
0x47, 0x00,
0x4a, 0x00,
0x50, 0x10,
0x51, 0x38,
0x52, 0x21,
0x58, 0x54,
0x59, 0x86,
0x5a, 0x0,
0x5b, 0x9b,
0x5c, 0x08,
0x5d, 0x7f,
0x5e, 0x0,
0x5f, 0xff,
0x70, 0x0,
0x71, 0x0,
0x72, 0x0,
0x74, 0x0,
0x75, 0x0,
0x76, 0x0,
0x81, 0x0,
0x82, 0x3f,
0x83, 0x3f,
0x84, 0x0,
0x85, 0x0,
0x88, 0x0,
0x89, 0x0,
0x8a, 0x0,
0x8b, 0x0,
0x8c, 0x0,
0x90, 0x0,
0x91, 0x0,
0x92, 0x0,
0x93, 0x0,
0x94, 0x1c,
0x97, 0x0,
0xa0, 0x48,
0xa1, 0x0,
0xb0, 0xb8,
0xb1, 0x3a,
0xb2, 0x10,
0xb3, 0x82,
0xb4, 0x80,
0xb5, 0x82,
0xb6, 0x82,
0xb7, 0x82,
0xb8, 0x20,
0xb9, 0x0,
0xf0, 0x0,
0xf1, 0x0,
0xf2, 0xc0,
0x51, 0x36,
0x52, 0x09,
0x53, 0x94,
0x54, 0x62,
0x55, 0x29,
0x56, 0x64,
0x57, 0x2b,
0xff, 0xff,
};
static int stv0288_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage volt)
{
dprintk("%s: %s\n", __func__,
volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");
return 0;
}
static int stv0288_init(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
int i;
u8 reg;
u8 val;
dprintk("stv0288: init chip\n");
stv0288_writeregI(state, 0x41, 0x04);
msleep(50);
/* we have default inittab */
if (state->config->inittab == NULL) {
for (i = 0; !(stv0288_inittab[i] == 0xff &&
stv0288_inittab[i + 1] == 0xff); i += 2)
stv0288_writeregI(state, stv0288_inittab[i],
stv0288_inittab[i + 1]);
} else {
for (i = 0; ; i += 2) {
reg = state->config->inittab[i];
val = state->config->inittab[i+1];
if (reg == 0xff && val == 0xff)
break;
stv0288_writeregI(state, reg, val);
}
}
return 0;
}
static int stv0288_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct stv0288_state *state = fe->demodulator_priv;
u8 sync = stv0288_readreg(state, 0x24);
if (sync == 255)
sync = 0;
dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
*status = 0;
if (sync & 0x80)
*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
if (sync & 0x10)
*status |= FE_HAS_VITERBI;
if (sync & 0x08) {
*status |= FE_HAS_LOCK;
dprintk("stv0288 has locked\n");
}
return 0;
}
static int stv0288_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct stv0288_state *state = fe->demodulator_priv;
if (state->errmode != STATUS_BER)
return 0;
*ber = (stv0288_readreg(state, 0x26) << 8) |
stv0288_readreg(state, 0x27);
dprintk("stv0288_read_ber %d\n", *ber);
return 0;
}
static int stv0288_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct stv0288_state *state = fe->demodulator_priv;
s32 signal = 0xffff - ((stv0288_readreg(state, 0x10) << 8));
signal = signal * 5 / 4;
*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
dprintk("stv0288_read_signal_strength %d\n", *strength);
return 0;
}
static int stv0288_sleep(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
stv0288_writeregI(state, 0x41, 0x84);
state->initialised = 0;
return 0;
}
static int stv0288_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct stv0288_state *state = fe->demodulator_priv;
s32 xsnr = 0xffff - ((stv0288_readreg(state, 0x2d) << 8)
| stv0288_readreg(state, 0x2e));
xsnr = 3 * (xsnr - 0xa100);
*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
dprintk("stv0288_read_snr %d\n", *snr);
return 0;
}
static int stv0288_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct stv0288_state *state = fe->demodulator_priv;
if (state->errmode != STATUS_BER)
return 0;
*ucblocks = (stv0288_readreg(state, 0x26) << 8) |
stv0288_readreg(state, 0x27);
dprintk("stv0288_read_ber %d\n", *ucblocks);
return 0;
}
static int stv0288_set_frontend(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
char tm;
unsigned char tda[3];
u8 reg, time_out = 0;
dprintk("%s : FE_SET_FRONTEND\n", __func__);
if (c->delivery_system != SYS_DVBS) {
dprintk("%s: unsupported delivery system selected (%d)\n",
__func__, c->delivery_system);
return -EOPNOTSUPP;
}
if (state->config->set_ts_params)
state->config->set_ts_params(fe, 0);
/* only frequency & symbol_rate are used for 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);
}
udelay(10);
stv0288_set_symbolrate(fe, c->symbol_rate);
/* Carrier lock control register */
stv0288_writeregI(state, 0x15, 0xc5);
tda[2] = 0x0; /* CFRL */
for (tm = -9; tm < 7;) {
/* Viterbi status */
reg = stv0288_readreg(state, 0x24);
if (reg & 0x8)
break;
if (reg & 0x80) {
time_out++;
if (time_out > 10)
break;
tda[2] += 40;
if (tda[2] < 40)
tm++;
} else {
tm++;
tda[2] = 0;
time_out = 0;
}
tda[1] = (unsigned char)tm;
stv0288_writeregI(state, 0x2b, tda[1]);
stv0288_writeregI(state, 0x2c, tda[2]);
msleep(30);
}
state->tuner_frequency = c->frequency;
state->fec_inner = FEC_AUTO;
state->symbol_rate = c->symbol_rate;
return 0;
}
static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct stv0288_state *state = fe->demodulator_priv;
if (enable)
stv0288_writeregI(state, 0x01, 0xb5);
else
stv0288_writeregI(state, 0x01, 0x35);
udelay(1);
return 0;
}
static void stv0288_release(struct dvb_frontend *fe)
{
struct stv0288_state *state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops stv0288_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "ST STV0288 DVB-S",
.frequency_min_hz = 950 * MHz,
.frequency_max_hz = 2150 * MHz,
.frequency_stepsize_hz = 1 * MHz,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
.symbol_rate_tolerance = 500, /* ppm */
.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_QPSK |
FE_CAN_FEC_AUTO
},
.release = stv0288_release,
.init = stv0288_init,
.sleep = stv0288_sleep,
.write = stv0288_write,
.i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
.read_status = stv0288_read_status,
.read_ber = stv0288_read_ber,
.read_signal_strength = stv0288_read_signal_strength,
.read_snr = stv0288_read_snr,
.read_ucblocks = stv0288_read_ucblocks,
.diseqc_send_master_cmd = stv0288_send_diseqc_msg,
.diseqc_send_burst = stv0288_send_diseqc_burst,
.set_tone = stv0288_set_tone,
.set_voltage = stv0288_set_voltage,
.set_frontend = stv0288_set_frontend,
};
struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
struct i2c_adapter *i2c)
{
struct stv0288_state *state = NULL;
int id;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct stv0288_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->initialised = 0;
state->tuner_frequency = 0;
state->symbol_rate = 0;
state->fec_inner = 0;
state->errmode = STATUS_BER;
stv0288_writeregI(state, 0x41, 0x04);
msleep(200);
id = stv0288_readreg(state, 0x00);
dprintk("stv0288 id %x\n", id);
/* register 0x00 contains 0x11 for STV0288 */
if (id != 0x11)
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &stv0288_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(stv0288_attach);
module_param(debug_legacy_dish_switch, int, 0444);
MODULE_PARM_DESC(debug_legacy_dish_switch,
"Enable timing analysis for Dish Network legacy switches");
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver");
MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin");
MODULE_LICENSE("GPL");
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