linux/drivers/media/dvb-frontends/s5h1409.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

1012 lines
23 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
Samsung S5H1409 VSB/QAM demodulator driver
Copyright (C) 2006 Steven Toth <stoth@linuxtv.org>
*/
#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 <media/dvb_frontend.h>
#include "s5h1409.h"
struct s5h1409_state {
struct i2c_adapter *i2c;
/* configuration settings */
const struct s5h1409_config *config;
struct dvb_frontend frontend;
/* previous uncorrected block counter */
enum fe_modulation current_modulation;
u32 current_frequency;
int if_freq;
u32 is_qam_locked;
/* QAM tuning state goes through the following state transitions */
#define QAM_STATE_UNTUNED 0
#define QAM_STATE_TUNING_STARTED 1
#define QAM_STATE_INTERLEAVE_SET 2
#define QAM_STATE_QAM_OPTIMIZED_L1 3
#define QAM_STATE_QAM_OPTIMIZED_L2 4
#define QAM_STATE_QAM_OPTIMIZED_L3 5
u8 qam_state;
};
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable verbose debug messages");
#define dprintk if (debug) printk
/* Register values to initialise the demod, this will set VSB by default */
static struct init_tab {
u8 reg;
u16 data;
} init_tab[] = {
{ 0x00, 0x0071, },
{ 0x01, 0x3213, },
{ 0x09, 0x0025, },
{ 0x1c, 0x001d, },
{ 0x1f, 0x002d, },
{ 0x20, 0x001d, },
{ 0x22, 0x0022, },
{ 0x23, 0x0020, },
{ 0x29, 0x110f, },
{ 0x2a, 0x10b4, },
{ 0x2b, 0x10ae, },
{ 0x2c, 0x0031, },
{ 0x31, 0x010d, },
{ 0x32, 0x0100, },
{ 0x44, 0x0510, },
{ 0x54, 0x0104, },
{ 0x58, 0x2222, },
{ 0x59, 0x1162, },
{ 0x5a, 0x3211, },
{ 0x5d, 0x0370, },
{ 0x5e, 0x0296, },
{ 0x61, 0x0010, },
{ 0x63, 0x4a00, },
{ 0x65, 0x0800, },
{ 0x71, 0x0003, },
{ 0x72, 0x0470, },
{ 0x81, 0x0002, },
{ 0x82, 0x0600, },
{ 0x86, 0x0002, },
{ 0x8a, 0x2c38, },
{ 0x8b, 0x2a37, },
{ 0x92, 0x302f, },
{ 0x93, 0x3332, },
{ 0x96, 0x000c, },
{ 0x99, 0x0101, },
{ 0x9c, 0x2e37, },
{ 0x9d, 0x2c37, },
{ 0x9e, 0x2c37, },
{ 0xab, 0x0100, },
{ 0xac, 0x1003, },
{ 0xad, 0x103f, },
{ 0xe2, 0x0100, },
{ 0xe3, 0x1000, },
{ 0x28, 0x1010, },
{ 0xb1, 0x000e, },
};
/* VSB SNR lookup table */
static struct vsb_snr_tab {
u16 val;
u16 data;
} vsb_snr_tab[] = {
{ 924, 300, },
{ 923, 300, },
{ 918, 295, },
{ 915, 290, },
{ 911, 285, },
{ 906, 280, },
{ 901, 275, },
{ 896, 270, },
{ 891, 265, },
{ 885, 260, },
{ 879, 255, },
{ 873, 250, },
{ 864, 245, },
{ 858, 240, },
{ 850, 235, },
{ 841, 230, },
{ 832, 225, },
{ 823, 220, },
{ 812, 215, },
{ 802, 210, },
{ 788, 205, },
{ 778, 200, },
{ 767, 195, },
{ 753, 190, },
{ 740, 185, },
{ 725, 180, },
{ 707, 175, },
{ 689, 170, },
{ 671, 165, },
{ 656, 160, },
{ 637, 155, },
{ 616, 150, },
{ 542, 145, },
{ 519, 140, },
{ 507, 135, },
{ 497, 130, },
{ 492, 125, },
{ 474, 120, },
{ 300, 111, },
{ 0, 0, },
};
/* QAM64 SNR lookup table */
static struct qam64_snr_tab {
u16 val;
u16 data;
} qam64_snr_tab[] = {
{ 1, 0, },
{ 12, 300, },
{ 15, 290, },
{ 18, 280, },
{ 22, 270, },
{ 23, 268, },
{ 24, 266, },
{ 25, 264, },
{ 27, 262, },
{ 28, 260, },
{ 29, 258, },
{ 30, 256, },
{ 32, 254, },
{ 33, 252, },
{ 34, 250, },
{ 35, 249, },
{ 36, 248, },
{ 37, 247, },
{ 38, 246, },
{ 39, 245, },
{ 40, 244, },
{ 41, 243, },
{ 42, 241, },
{ 43, 240, },
{ 44, 239, },
{ 45, 238, },
{ 46, 237, },
{ 47, 236, },
{ 48, 235, },
{ 49, 234, },
{ 50, 233, },
{ 51, 232, },
{ 52, 231, },
{ 53, 230, },
{ 55, 229, },
{ 56, 228, },
{ 57, 227, },
{ 58, 226, },
{ 59, 225, },
{ 60, 224, },
{ 62, 223, },
{ 63, 222, },
{ 65, 221, },
{ 66, 220, },
{ 68, 219, },
{ 69, 218, },
{ 70, 217, },
{ 72, 216, },
{ 73, 215, },
{ 75, 214, },
{ 76, 213, },
{ 78, 212, },
{ 80, 211, },
{ 81, 210, },
{ 83, 209, },
{ 84, 208, },
{ 85, 207, },
{ 87, 206, },
{ 89, 205, },
{ 91, 204, },
{ 93, 203, },
{ 95, 202, },
{ 96, 201, },
{ 104, 200, },
{ 255, 0, },
};
/* QAM256 SNR lookup table */
static struct qam256_snr_tab {
u16 val;
u16 data;
} qam256_snr_tab[] = {
{ 1, 0, },
{ 12, 400, },
{ 13, 390, },
{ 15, 380, },
{ 17, 360, },
{ 19, 350, },
{ 22, 348, },
{ 23, 346, },
{ 24, 344, },
{ 25, 342, },
{ 26, 340, },
{ 27, 336, },
{ 28, 334, },
{ 29, 332, },
{ 30, 330, },
{ 31, 328, },
{ 32, 326, },
{ 33, 325, },
{ 34, 322, },
{ 35, 320, },
{ 37, 318, },
{ 39, 316, },
{ 40, 314, },
{ 41, 312, },
{ 42, 310, },
{ 43, 308, },
{ 46, 306, },
{ 47, 304, },
{ 49, 302, },
{ 51, 300, },
{ 53, 298, },
{ 54, 297, },
{ 55, 296, },
{ 56, 295, },
{ 57, 294, },
{ 59, 293, },
{ 60, 292, },
{ 61, 291, },
{ 63, 290, },
{ 64, 289, },
{ 65, 288, },
{ 66, 287, },
{ 68, 286, },
{ 69, 285, },
{ 71, 284, },
{ 72, 283, },
{ 74, 282, },
{ 75, 281, },
{ 76, 280, },
{ 77, 279, },
{ 78, 278, },
{ 81, 277, },
{ 83, 276, },
{ 84, 275, },
{ 86, 274, },
{ 87, 273, },
{ 89, 272, },
{ 90, 271, },
{ 92, 270, },
{ 93, 269, },
{ 95, 268, },
{ 96, 267, },
{ 98, 266, },
{ 100, 265, },
{ 102, 264, },
{ 104, 263, },
{ 105, 262, },
{ 106, 261, },
{ 110, 260, },
{ 255, 0, },
};
/* 8 bit registers, 16 bit values */
static int s5h1409_writereg(struct s5h1409_state *state, u8 reg, u16 data)
{
int ret;
u8 buf[] = { reg, data >> 8, data & 0xff };
struct i2c_msg msg = { .addr = state->config->demod_address,
.flags = 0, .buf = buf, .len = 3 };
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1)
printk(KERN_ERR "%s: error (reg == 0x%02x, val == 0x%04x, ret == %i)\n",
__func__, reg, data, ret);
return (ret != 1) ? -1 : 0;
}
static u16 s5h1409_readreg(struct s5h1409_state *state, u8 reg)
{
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0, 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 = 2 } };
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2)
printk("%s: readreg error (ret == %i)\n", __func__, ret);
return (b1[0] << 8) | b1[1];
}
static int s5h1409_softreset(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
s5h1409_writereg(state, 0xf5, 0);
s5h1409_writereg(state, 0xf5, 1);
state->is_qam_locked = 0;
state->qam_state = QAM_STATE_UNTUNED;
return 0;
}
#define S5H1409_VSB_IF_FREQ 5380
#define S5H1409_QAM_IF_FREQ (state->config->qam_if)
static int s5h1409_set_if_freq(struct dvb_frontend *fe, int KHz)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(%d KHz)\n", __func__, KHz);
switch (KHz) {
case 4000:
s5h1409_writereg(state, 0x87, 0x014b);
s5h1409_writereg(state, 0x88, 0x0cb5);
s5h1409_writereg(state, 0x89, 0x03e2);
break;
case 5380:
case 44000:
default:
s5h1409_writereg(state, 0x87, 0x01be);
s5h1409_writereg(state, 0x88, 0x0436);
s5h1409_writereg(state, 0x89, 0x054d);
break;
}
state->if_freq = KHz;
return 0;
}
static int s5h1409_set_spectralinversion(struct dvb_frontend *fe, int inverted)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(%d)\n", __func__, inverted);
if (inverted == 1)
return s5h1409_writereg(state, 0x1b, 0x1101); /* Inverted */
else
return s5h1409_writereg(state, 0x1b, 0x0110); /* Normal */
}
static int s5h1409_enable_modulation(struct dvb_frontend *fe,
enum fe_modulation m)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(0x%08x)\n", __func__, m);
switch (m) {
case VSB_8:
dprintk("%s() VSB_8\n", __func__);
if (state->if_freq != S5H1409_VSB_IF_FREQ)
s5h1409_set_if_freq(fe, S5H1409_VSB_IF_FREQ);
s5h1409_writereg(state, 0xf4, 0);
break;
case QAM_64:
case QAM_256:
case QAM_AUTO:
dprintk("%s() QAM_AUTO (64/256)\n", __func__);
if (state->if_freq != S5H1409_QAM_IF_FREQ)
s5h1409_set_if_freq(fe, S5H1409_QAM_IF_FREQ);
s5h1409_writereg(state, 0xf4, 1);
s5h1409_writereg(state, 0x85, 0x110);
break;
default:
dprintk("%s() Invalid modulation\n", __func__);
return -EINVAL;
}
state->current_modulation = m;
s5h1409_softreset(fe);
return 0;
}
static int s5h1409_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(%d)\n", __func__, enable);
if (enable)
return s5h1409_writereg(state, 0xf3, 1);
else
return s5h1409_writereg(state, 0xf3, 0);
}
static int s5h1409_set_gpio(struct dvb_frontend *fe, int enable)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(%d)\n", __func__, enable);
if (enable)
return s5h1409_writereg(state, 0xe3,
s5h1409_readreg(state, 0xe3) | 0x1100);
else
return s5h1409_writereg(state, 0xe3,
s5h1409_readreg(state, 0xe3) & 0xfeff);
}
static int s5h1409_sleep(struct dvb_frontend *fe, int enable)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(%d)\n", __func__, enable);
return s5h1409_writereg(state, 0xf2, enable);
}
static int s5h1409_register_reset(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
return s5h1409_writereg(state, 0xfa, 0);
}
static void s5h1409_set_qam_amhum_mode(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg;
if (state->qam_state < QAM_STATE_INTERLEAVE_SET) {
/* We should not perform amhum optimization until
the interleave mode has been configured */
return;
}
if (state->qam_state == QAM_STATE_QAM_OPTIMIZED_L3) {
/* We've already reached the maximum optimization level, so
don't bother banging on the status registers */
return;
}
/* QAM EQ lock check */
reg = s5h1409_readreg(state, 0xf0);
if ((reg >> 13) & 0x1) {
reg &= 0xff;
s5h1409_writereg(state, 0x96, 0x000c);
if (reg < 0x68) {
if (state->qam_state < QAM_STATE_QAM_OPTIMIZED_L3) {
dprintk("%s() setting QAM state to OPT_L3\n",
__func__);
s5h1409_writereg(state, 0x93, 0x3130);
s5h1409_writereg(state, 0x9e, 0x2836);
state->qam_state = QAM_STATE_QAM_OPTIMIZED_L3;
}
} else {
if (state->qam_state < QAM_STATE_QAM_OPTIMIZED_L2) {
dprintk("%s() setting QAM state to OPT_L2\n",
__func__);
s5h1409_writereg(state, 0x93, 0x3332);
s5h1409_writereg(state, 0x9e, 0x2c37);
state->qam_state = QAM_STATE_QAM_OPTIMIZED_L2;
}
}
} else {
if (state->qam_state < QAM_STATE_QAM_OPTIMIZED_L1) {
dprintk("%s() setting QAM state to OPT_L1\n", __func__);
s5h1409_writereg(state, 0x96, 0x0008);
s5h1409_writereg(state, 0x93, 0x3332);
s5h1409_writereg(state, 0x9e, 0x2c37);
state->qam_state = QAM_STATE_QAM_OPTIMIZED_L1;
}
}
}
static void s5h1409_set_qam_amhum_mode_legacy(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg;
if (state->is_qam_locked)
return;
/* QAM EQ lock check */
reg = s5h1409_readreg(state, 0xf0);
if ((reg >> 13) & 0x1) {
state->is_qam_locked = 1;
reg &= 0xff;
s5h1409_writereg(state, 0x96, 0x00c);
if ((reg < 0x38) || (reg > 0x68)) {
s5h1409_writereg(state, 0x93, 0x3332);
s5h1409_writereg(state, 0x9e, 0x2c37);
} else {
s5h1409_writereg(state, 0x93, 0x3130);
s5h1409_writereg(state, 0x9e, 0x2836);
}
} else {
s5h1409_writereg(state, 0x96, 0x0008);
s5h1409_writereg(state, 0x93, 0x3332);
s5h1409_writereg(state, 0x9e, 0x2c37);
}
}
static void s5h1409_set_qam_interleave_mode(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg, reg1, reg2;
if (state->qam_state >= QAM_STATE_INTERLEAVE_SET) {
/* We've done the optimization already */
return;
}
reg = s5h1409_readreg(state, 0xf1);
/* Master lock */
if ((reg >> 15) & 0x1) {
if (state->qam_state == QAM_STATE_UNTUNED ||
state->qam_state == QAM_STATE_TUNING_STARTED) {
dprintk("%s() setting QAM state to INTERLEAVE_SET\n",
__func__);
reg1 = s5h1409_readreg(state, 0xb2);
reg2 = s5h1409_readreg(state, 0xad);
s5h1409_writereg(state, 0x96, 0x0020);
s5h1409_writereg(state, 0xad,
(((reg1 & 0xf000) >> 4) | (reg2 & 0xf0ff)));
state->qam_state = QAM_STATE_INTERLEAVE_SET;
}
} else {
if (state->qam_state == QAM_STATE_UNTUNED) {
dprintk("%s() setting QAM state to TUNING_STARTED\n",
__func__);
s5h1409_writereg(state, 0x96, 0x08);
s5h1409_writereg(state, 0xab,
s5h1409_readreg(state, 0xab) | 0x1001);
state->qam_state = QAM_STATE_TUNING_STARTED;
}
}
}
static void s5h1409_set_qam_interleave_mode_legacy(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg, reg1, reg2;
reg = s5h1409_readreg(state, 0xf1);
/* Master lock */
if ((reg >> 15) & 0x1) {
if (state->qam_state != 2) {
state->qam_state = 2;
reg1 = s5h1409_readreg(state, 0xb2);
reg2 = s5h1409_readreg(state, 0xad);
s5h1409_writereg(state, 0x96, 0x20);
s5h1409_writereg(state, 0xad,
(((reg1 & 0xf000) >> 4) | (reg2 & 0xf0ff)));
s5h1409_writereg(state, 0xab,
s5h1409_readreg(state, 0xab) & 0xeffe);
}
} else {
if (state->qam_state != 1) {
state->qam_state = 1;
s5h1409_writereg(state, 0x96, 0x08);
s5h1409_writereg(state, 0xab,
s5h1409_readreg(state, 0xab) | 0x1001);
}
}
}
/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
static int s5h1409_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s(frequency=%d)\n", __func__, p->frequency);
s5h1409_softreset(fe);
state->current_frequency = p->frequency;
s5h1409_enable_modulation(fe, p->modulation);
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);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
/* Issue a reset to the demod so it knows to resync against the
newly tuned frequency */
s5h1409_softreset(fe);
/* Optimize the demod for QAM */
if (state->current_modulation != VSB_8) {
/* This almost certainly applies to all boards, but for now
only do it for the HVR-1600. Once the other boards are
tested, the "legacy" versions can just go away */
if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
s5h1409_set_qam_interleave_mode(fe);
s5h1409_set_qam_amhum_mode(fe);
} else {
s5h1409_set_qam_amhum_mode_legacy(fe);
s5h1409_set_qam_interleave_mode_legacy(fe);
}
}
return 0;
}
static int s5h1409_set_mpeg_timing(struct dvb_frontend *fe, int mode)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 val;
dprintk("%s(%d)\n", __func__, mode);
val = s5h1409_readreg(state, 0xac) & 0xcfff;
switch (mode) {
case S5H1409_MPEGTIMING_CONTINUOUS_INVERTING_CLOCK:
val |= 0x0000;
break;
case S5H1409_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK:
dprintk("%s(%d) Mode1 or Defaulting\n", __func__, mode);
val |= 0x1000;
break;
case S5H1409_MPEGTIMING_NONCONTINUOUS_INVERTING_CLOCK:
val |= 0x2000;
break;
case S5H1409_MPEGTIMING_NONCONTINUOUS_NONINVERTING_CLOCK:
val |= 0x3000;
break;
default:
return -EINVAL;
}
/* Configure MPEG Signal Timing charactistics */
return s5h1409_writereg(state, 0xac, val);
}
/* Reset the demod hardware and reset all of the configuration registers
to a default state. */
static int s5h1409_init(struct dvb_frontend *fe)
{
int i;
struct s5h1409_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
s5h1409_sleep(fe, 0);
s5h1409_register_reset(fe);
for (i = 0; i < ARRAY_SIZE(init_tab); i++)
s5h1409_writereg(state, init_tab[i].reg, init_tab[i].data);
/* The datasheet says that after initialisation, VSB is default */
state->current_modulation = VSB_8;
/* Optimize for the HVR-1600 if appropriate. Note that some of these
may get folded into the generic case after testing with other
devices */
if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
/* VSB AGC REF */
s5h1409_writereg(state, 0x09, 0x0050);
/* Unknown but Windows driver does it... */
s5h1409_writereg(state, 0x21, 0x0001);
s5h1409_writereg(state, 0x50, 0x030e);
/* QAM AGC REF */
s5h1409_writereg(state, 0x82, 0x0800);
}
if (state->config->output_mode == S5H1409_SERIAL_OUTPUT)
s5h1409_writereg(state, 0xab,
s5h1409_readreg(state, 0xab) | 0x100); /* Serial */
else
s5h1409_writereg(state, 0xab,
s5h1409_readreg(state, 0xab) & 0xfeff); /* Parallel */
s5h1409_set_spectralinversion(fe, state->config->inversion);
s5h1409_set_if_freq(fe, state->if_freq);
s5h1409_set_gpio(fe, state->config->gpio);
s5h1409_set_mpeg_timing(fe, state->config->mpeg_timing);
s5h1409_softreset(fe);
/* Note: Leaving the I2C gate closed. */
s5h1409_i2c_gate_ctrl(fe, 0);
return 0;
}
static int s5h1409_read_status(struct dvb_frontend *fe, enum fe_status *status)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg;
u32 tuner_status = 0;
*status = 0;
/* Optimize the demod for QAM */
if (state->current_modulation != VSB_8) {
/* This almost certainly applies to all boards, but for now
only do it for the HVR-1600. Once the other boards are
tested, the "legacy" versions can just go away */
if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) {
s5h1409_set_qam_interleave_mode(fe);
s5h1409_set_qam_amhum_mode(fe);
}
}
/* Get the demodulator status */
reg = s5h1409_readreg(state, 0xf1);
if (reg & 0x1000)
*status |= FE_HAS_VITERBI;
if (reg & 0x8000)
*status |= FE_HAS_LOCK | FE_HAS_SYNC;
switch (state->config->status_mode) {
case S5H1409_DEMODLOCKING:
if (*status & FE_HAS_VITERBI)
*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
break;
case S5H1409_TUNERLOCKING:
/* Get the tuner status */
if (fe->ops.tuner_ops.get_status) {
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
fe->ops.tuner_ops.get_status(fe, &tuner_status);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
if (tuner_status)
*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
break;
}
dprintk("%s() status 0x%08x\n", __func__, *status);
return 0;
}
static int s5h1409_qam256_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
{
int i, ret = -EINVAL;
dprintk("%s()\n", __func__);
for (i = 0; i < ARRAY_SIZE(qam256_snr_tab); i++) {
if (v < qam256_snr_tab[i].val) {
*snr = qam256_snr_tab[i].data;
ret = 0;
break;
}
}
return ret;
}
static int s5h1409_qam64_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
{
int i, ret = -EINVAL;
dprintk("%s()\n", __func__);
for (i = 0; i < ARRAY_SIZE(qam64_snr_tab); i++) {
if (v < qam64_snr_tab[i].val) {
*snr = qam64_snr_tab[i].data;
ret = 0;
break;
}
}
return ret;
}
static int s5h1409_vsb_lookup_snr(struct dvb_frontend *fe, u16 *snr, u16 v)
{
int i, ret = -EINVAL;
dprintk("%s()\n", __func__);
for (i = 0; i < ARRAY_SIZE(vsb_snr_tab); i++) {
if (v > vsb_snr_tab[i].val) {
*snr = vsb_snr_tab[i].data;
ret = 0;
break;
}
}
dprintk("%s() snr=%d\n", __func__, *snr);
return ret;
}
static int s5h1409_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg;
dprintk("%s()\n", __func__);
switch (state->current_modulation) {
case QAM_64:
reg = s5h1409_readreg(state, 0xf0) & 0xff;
return s5h1409_qam64_lookup_snr(fe, snr, reg);
case QAM_256:
reg = s5h1409_readreg(state, 0xf0) & 0xff;
return s5h1409_qam256_lookup_snr(fe, snr, reg);
case VSB_8:
reg = s5h1409_readreg(state, 0xf1) & 0x3ff;
return s5h1409_vsb_lookup_snr(fe, snr, reg);
default:
break;
}
return -EINVAL;
}
static int s5h1409_read_signal_strength(struct dvb_frontend *fe,
u16 *signal_strength)
{
/* borrowed from lgdt330x.c
*
* Calculate strength from SNR up to 35dB
* Even though the SNR can go higher than 35dB,
* there is some comfort factor in having a range of
* strong signals that can show at 100%
*/
u16 snr;
u32 tmp;
int ret = s5h1409_read_snr(fe, &snr);
*signal_strength = 0;
if (0 == ret) {
/* The following calculation method was chosen
* purely for the sake of code re-use from the
* other demod drivers that use this method */
/* Convert from SNR in dB * 10 to 8.24 fixed-point */
tmp = (snr * ((1 << 24) / 10));
/* Convert from 8.24 fixed-point to
* scale the range 0 - 35*2^24 into 0 - 65535*/
if (tmp >= 8960 * 0x10000)
*signal_strength = 0xffff;
else
*signal_strength = tmp / 8960;
}
return ret;
}
static int s5h1409_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct s5h1409_state *state = fe->demodulator_priv;
*ucblocks = s5h1409_readreg(state, 0xb5);
return 0;
}
static int s5h1409_read_ber(struct dvb_frontend *fe, u32 *ber)
{
return s5h1409_read_ucblocks(fe, ber);
}
static int s5h1409_get_frontend(struct dvb_frontend *fe,
struct dtv_frontend_properties *p)
{
struct s5h1409_state *state = fe->demodulator_priv;
p->frequency = state->current_frequency;
p->modulation = state->current_modulation;
return 0;
}
static int s5h1409_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1000;
return 0;
}
static void s5h1409_release(struct dvb_frontend *fe)
{
struct s5h1409_state *state = fe->demodulator_priv;
kfree(state);
}
static const struct dvb_frontend_ops s5h1409_ops;
struct dvb_frontend *s5h1409_attach(const struct s5h1409_config *config,
struct i2c_adapter *i2c)
{
struct s5h1409_state *state = NULL;
u16 reg;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct s5h1409_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->current_modulation = 0;
state->if_freq = S5H1409_VSB_IF_FREQ;
/* check if the demod exists */
reg = s5h1409_readreg(state, 0x04);
if ((reg != 0x0066) && (reg != 0x007f))
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &s5h1409_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
if (s5h1409_init(&state->frontend) != 0) {
printk(KERN_ERR "%s: Failed to initialize correctly\n",
__func__);
goto error;
}
/* Note: Leaving the I2C gate open here. */
s5h1409_i2c_gate_ctrl(&state->frontend, 1);
return &state->frontend;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(s5h1409_attach);
static const struct dvb_frontend_ops s5h1409_ops = {
.delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
.info = {
.name = "Samsung S5H1409 QAM/8VSB Frontend",
.frequency_min_hz = 54 * MHz,
.frequency_max_hz = 858 * MHz,
.frequency_stepsize_hz = 62500,
.caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
},
.init = s5h1409_init,
.i2c_gate_ctrl = s5h1409_i2c_gate_ctrl,
.set_frontend = s5h1409_set_frontend,
.get_frontend = s5h1409_get_frontend,
.get_tune_settings = s5h1409_get_tune_settings,
.read_status = s5h1409_read_status,
.read_ber = s5h1409_read_ber,
.read_signal_strength = s5h1409_read_signal_strength,
.read_snr = s5h1409_read_snr,
.read_ucblocks = s5h1409_read_ucblocks,
.release = s5h1409_release,
};
MODULE_DESCRIPTION("Samsung S5H1409 QAM-B/ATSC Demodulator driver");
MODULE_AUTHOR("Steven Toth");
MODULE_LICENSE("GPL");