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android_kernel_xiaomi_sm8350/drivers/media/dvb/frontends/s5h1409.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

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/*
Samsung S5H1409 VSB/QAM demodulator driver
Copyright (C) 2006 Steven Toth <stoth@linuxtv.org>
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 "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 */
fe_modulation_t current_modulation;
u32 current_frequency;
int if_freq;
u32 is_qam_locked;
u32 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 = 0;
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,
fe_modulation_t 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->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;
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 dvb_frontend_parameters *p)
{
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->u.vsb.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, p);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
/* Optimize the demod for QAM */
if (p->u.vsb.modulation != VSB_8) {
s5h1409_set_qam_amhum_mode(fe);
s5h1409_set_qam_interleave_mode(fe);
}
/* Issue a reset to the demod so it knows to resync against the
newly tuned frequency */
s5h1409_softreset(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_CONTINOUS_INVERTING_CLOCK:
val |= 0x0000;
break;
case S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK:
dprintk("%s(%d) Mode1 or Defaulting\n", __func__, mode);
val |= 0x1000;
break;
case S5H1409_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK:
val |= 0x2000;
break;
case S5H1409_MPEGTIMING_NONCONTINOUS_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;
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, fe_status_t *status)
{
struct s5h1409_state *state = fe->demodulator_priv;
u16 reg;
u32 tuner_status = 0;
*status = 0;
/* 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)
{
return s5h1409_read_snr(fe, signal_strength);
}
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 dvb_frontend_parameters *p)
{
struct s5h1409_state *state = fe->demodulator_priv;
p->frequency = state->current_frequency;
p->u.vsb.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 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 struct dvb_frontend_ops s5h1409_ops = {
.info = {
.name = "Samsung S5H1409 QAM/8VSB Frontend",
.type = FE_ATSC,
.frequency_min = 54000000,
.frequency_max = 858000000,
.frequency_stepsize = 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");
/*
* Local variables:
* c-basic-offset: 8
*/
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