linux/drivers/media/dvb/frontends/s5h1411.c
Devin Heitmueller 726cf2000b V4L/DVB (9633): Put s5h1411 into low power mode at end of attach() call
Place the s5h1411 into low power mode until first use (to handle the case where
the user plugs in the device and then doesn't use it for a while).  On the
Pinnacle 801e, this brings the power usage from 126ma down to 82ma.

Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-12-29 17:53:34 -02:00

924 lines
23 KiB
C

/*
Samsung S5H1411 VSB/QAM demodulator driver
Copyright (C) 2008 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 "s5h1411.h"
struct s5h1411_state {
struct i2c_adapter *i2c;
/* configuration settings */
const struct s5h1411_config *config;
struct dvb_frontend frontend;
fe_modulation_t current_modulation;
unsigned int first_tune:1;
u32 current_frequency;
int if_freq;
u8 inversion;
};
static int debug;
#define dprintk(arg...) do { \
if (debug) \
printk(arg); \
} while (0)
/* Register values to initialise the demod, defaults to VSB */
static struct init_tab {
u8 addr;
u8 reg;
u16 data;
} init_tab[] = {
{ S5H1411_I2C_TOP_ADDR, 0x00, 0x0071, },
{ S5H1411_I2C_TOP_ADDR, 0x08, 0x0047, },
{ S5H1411_I2C_TOP_ADDR, 0x1c, 0x0400, },
{ S5H1411_I2C_TOP_ADDR, 0x1e, 0x0370, },
{ S5H1411_I2C_TOP_ADDR, 0x1f, 0x342c, },
{ S5H1411_I2C_TOP_ADDR, 0x24, 0x0231, },
{ S5H1411_I2C_TOP_ADDR, 0x25, 0x1011, },
{ S5H1411_I2C_TOP_ADDR, 0x26, 0x0f07, },
{ S5H1411_I2C_TOP_ADDR, 0x27, 0x0f04, },
{ S5H1411_I2C_TOP_ADDR, 0x28, 0x070f, },
{ S5H1411_I2C_TOP_ADDR, 0x29, 0x2820, },
{ S5H1411_I2C_TOP_ADDR, 0x2a, 0x102e, },
{ S5H1411_I2C_TOP_ADDR, 0x2b, 0x0220, },
{ S5H1411_I2C_TOP_ADDR, 0x2e, 0x0d0e, },
{ S5H1411_I2C_TOP_ADDR, 0x2f, 0x1013, },
{ S5H1411_I2C_TOP_ADDR, 0x31, 0x171b, },
{ S5H1411_I2C_TOP_ADDR, 0x32, 0x0e0f, },
{ S5H1411_I2C_TOP_ADDR, 0x33, 0x0f10, },
{ S5H1411_I2C_TOP_ADDR, 0x34, 0x170e, },
{ S5H1411_I2C_TOP_ADDR, 0x35, 0x4b10, },
{ S5H1411_I2C_TOP_ADDR, 0x36, 0x0f17, },
{ S5H1411_I2C_TOP_ADDR, 0x3c, 0x1577, },
{ S5H1411_I2C_TOP_ADDR, 0x3d, 0x081a, },
{ S5H1411_I2C_TOP_ADDR, 0x3e, 0x77ee, },
{ S5H1411_I2C_TOP_ADDR, 0x40, 0x1e09, },
{ S5H1411_I2C_TOP_ADDR, 0x41, 0x0f0c, },
{ S5H1411_I2C_TOP_ADDR, 0x42, 0x1f10, },
{ S5H1411_I2C_TOP_ADDR, 0x4d, 0x0509, },
{ S5H1411_I2C_TOP_ADDR, 0x4e, 0x0a00, },
{ S5H1411_I2C_TOP_ADDR, 0x50, 0x0000, },
{ S5H1411_I2C_TOP_ADDR, 0x5b, 0x0000, },
{ S5H1411_I2C_TOP_ADDR, 0x5c, 0x0008, },
{ S5H1411_I2C_TOP_ADDR, 0x57, 0x1101, },
{ S5H1411_I2C_TOP_ADDR, 0x65, 0x007c, },
{ S5H1411_I2C_TOP_ADDR, 0x68, 0x0512, },
{ S5H1411_I2C_TOP_ADDR, 0x69, 0x0258, },
{ S5H1411_I2C_TOP_ADDR, 0x70, 0x0004, },
{ S5H1411_I2C_TOP_ADDR, 0x71, 0x0007, },
{ S5H1411_I2C_TOP_ADDR, 0x76, 0x00a9, },
{ S5H1411_I2C_TOP_ADDR, 0x78, 0x3141, },
{ S5H1411_I2C_TOP_ADDR, 0x7a, 0x3141, },
{ S5H1411_I2C_TOP_ADDR, 0xb3, 0x8003, },
{ S5H1411_I2C_TOP_ADDR, 0xb5, 0xa6bb, },
{ S5H1411_I2C_TOP_ADDR, 0xb6, 0x0609, },
{ S5H1411_I2C_TOP_ADDR, 0xb7, 0x2f06, },
{ S5H1411_I2C_TOP_ADDR, 0xb8, 0x003f, },
{ S5H1411_I2C_TOP_ADDR, 0xb9, 0x2700, },
{ S5H1411_I2C_TOP_ADDR, 0xba, 0xfac8, },
{ S5H1411_I2C_TOP_ADDR, 0xbe, 0x1003, },
{ S5H1411_I2C_TOP_ADDR, 0xbf, 0x103f, },
{ S5H1411_I2C_TOP_ADDR, 0xce, 0x2000, },
{ S5H1411_I2C_TOP_ADDR, 0xcf, 0x0800, },
{ S5H1411_I2C_TOP_ADDR, 0xd0, 0x0800, },
{ S5H1411_I2C_TOP_ADDR, 0xd1, 0x0400, },
{ S5H1411_I2C_TOP_ADDR, 0xd2, 0x0800, },
{ S5H1411_I2C_TOP_ADDR, 0xd3, 0x2000, },
{ S5H1411_I2C_TOP_ADDR, 0xd4, 0x3000, },
{ S5H1411_I2C_TOP_ADDR, 0xdb, 0x4a9b, },
{ S5H1411_I2C_TOP_ADDR, 0xdc, 0x1000, },
{ S5H1411_I2C_TOP_ADDR, 0xde, 0x0001, },
{ S5H1411_I2C_TOP_ADDR, 0xdf, 0x0000, },
{ S5H1411_I2C_TOP_ADDR, 0xe3, 0x0301, },
{ S5H1411_I2C_QAM_ADDR, 0xf3, 0x0000, },
{ S5H1411_I2C_QAM_ADDR, 0xf3, 0x0001, },
{ S5H1411_I2C_QAM_ADDR, 0x08, 0x0600, },
{ S5H1411_I2C_QAM_ADDR, 0x18, 0x4201, },
{ S5H1411_I2C_QAM_ADDR, 0x1e, 0x6476, },
{ S5H1411_I2C_QAM_ADDR, 0x21, 0x0830, },
{ S5H1411_I2C_QAM_ADDR, 0x0c, 0x5679, },
{ S5H1411_I2C_QAM_ADDR, 0x0d, 0x579b, },
{ S5H1411_I2C_QAM_ADDR, 0x24, 0x0102, },
{ S5H1411_I2C_QAM_ADDR, 0x31, 0x7488, },
{ S5H1411_I2C_QAM_ADDR, 0x32, 0x0a08, },
{ S5H1411_I2C_QAM_ADDR, 0x3d, 0x8689, },
{ S5H1411_I2C_QAM_ADDR, 0x49, 0x0048, },
{ S5H1411_I2C_QAM_ADDR, 0x57, 0x2012, },
{ S5H1411_I2C_QAM_ADDR, 0x5d, 0x7676, },
{ S5H1411_I2C_QAM_ADDR, 0x04, 0x0400, },
{ S5H1411_I2C_QAM_ADDR, 0x58, 0x00c0, },
{ S5H1411_I2C_QAM_ADDR, 0x5b, 0x0100, },
};
/* VSB SNR lookup table */
static struct vsb_snr_tab {
u16 val;
u16 data;
} vsb_snr_tab[] = {
{ 0x39f, 300, },
{ 0x39b, 295, },
{ 0x397, 290, },
{ 0x394, 285, },
{ 0x38f, 280, },
{ 0x38b, 275, },
{ 0x387, 270, },
{ 0x382, 265, },
{ 0x37d, 260, },
{ 0x377, 255, },
{ 0x370, 250, },
{ 0x36a, 245, },
{ 0x364, 240, },
{ 0x35b, 235, },
{ 0x353, 230, },
{ 0x349, 225, },
{ 0x340, 320, },
{ 0x337, 215, },
{ 0x327, 210, },
{ 0x31b, 205, },
{ 0x310, 200, },
{ 0x302, 195, },
{ 0x2f3, 190, },
{ 0x2e4, 185, },
{ 0x2d7, 180, },
{ 0x2cd, 175, },
{ 0x2bb, 170, },
{ 0x2a9, 165, },
{ 0x29e, 160, },
{ 0x284, 155, },
{ 0x27a, 150, },
{ 0x260, 145, },
{ 0x23a, 140, },
{ 0x224, 135, },
{ 0x213, 130, },
{ 0x204, 125, },
{ 0x1fe, 120, },
{ 0, 0, },
};
/* QAM64 SNR lookup table */
static struct qam64_snr_tab {
u16 val;
u16 data;
} qam64_snr_tab[] = {
{ 0x0001, 0, },
{ 0x0af0, 300, },
{ 0x0d80, 290, },
{ 0x10a0, 280, },
{ 0x14b5, 270, },
{ 0x1590, 268, },
{ 0x1680, 266, },
{ 0x17b0, 264, },
{ 0x18c0, 262, },
{ 0x19b0, 260, },
{ 0x1ad0, 258, },
{ 0x1d00, 256, },
{ 0x1da0, 254, },
{ 0x1ef0, 252, },
{ 0x2050, 250, },
{ 0x20f0, 249, },
{ 0x21d0, 248, },
{ 0x22b0, 247, },
{ 0x23a0, 246, },
{ 0x2470, 245, },
{ 0x24f0, 244, },
{ 0x25a0, 243, },
{ 0x26c0, 242, },
{ 0x27b0, 241, },
{ 0x28d0, 240, },
{ 0x29b0, 239, },
{ 0x2ad0, 238, },
{ 0x2ba0, 237, },
{ 0x2c80, 236, },
{ 0x2d20, 235, },
{ 0x2e00, 234, },
{ 0x2f10, 233, },
{ 0x3050, 232, },
{ 0x3190, 231, },
{ 0x3300, 230, },
{ 0x3340, 229, },
{ 0x3200, 228, },
{ 0x3550, 227, },
{ 0x3610, 226, },
{ 0x3600, 225, },
{ 0x3700, 224, },
{ 0x3800, 223, },
{ 0x3920, 222, },
{ 0x3a20, 221, },
{ 0x3b30, 220, },
{ 0x3d00, 219, },
{ 0x3e00, 218, },
{ 0x4000, 217, },
{ 0x4100, 216, },
{ 0x4300, 215, },
{ 0x4400, 214, },
{ 0x4600, 213, },
{ 0x4700, 212, },
{ 0x4800, 211, },
{ 0x4a00, 210, },
{ 0x4b00, 209, },
{ 0x4d00, 208, },
{ 0x4f00, 207, },
{ 0x5050, 206, },
{ 0x5200, 205, },
{ 0x53c0, 204, },
{ 0x5450, 203, },
{ 0x5650, 202, },
{ 0x5820, 201, },
{ 0x6000, 200, },
{ 0xffff, 0, },
};
/* QAM256 SNR lookup table */
static struct qam256_snr_tab {
u16 val;
u16 data;
} qam256_snr_tab[] = {
{ 0x0001, 0, },
{ 0x0970, 400, },
{ 0x0a90, 390, },
{ 0x0b90, 380, },
{ 0x0d90, 370, },
{ 0x0ff0, 360, },
{ 0x1240, 350, },
{ 0x1345, 348, },
{ 0x13c0, 346, },
{ 0x14c0, 344, },
{ 0x1500, 342, },
{ 0x1610, 340, },
{ 0x1700, 338, },
{ 0x1800, 336, },
{ 0x18b0, 334, },
{ 0x1900, 332, },
{ 0x1ab0, 330, },
{ 0x1bc0, 328, },
{ 0x1cb0, 326, },
{ 0x1db0, 324, },
{ 0x1eb0, 322, },
{ 0x2030, 320, },
{ 0x2200, 318, },
{ 0x2280, 316, },
{ 0x2410, 314, },
{ 0x25b0, 312, },
{ 0x27a0, 310, },
{ 0x2840, 308, },
{ 0x29d0, 306, },
{ 0x2b10, 304, },
{ 0x2d30, 302, },
{ 0x2f20, 300, },
{ 0x30c0, 298, },
{ 0x3260, 297, },
{ 0x32c0, 296, },
{ 0x3300, 295, },
{ 0x33b0, 294, },
{ 0x34b0, 293, },
{ 0x35a0, 292, },
{ 0x3650, 291, },
{ 0x3800, 290, },
{ 0x3900, 289, },
{ 0x3a50, 288, },
{ 0x3b30, 287, },
{ 0x3cb0, 286, },
{ 0x3e20, 285, },
{ 0x3fa0, 284, },
{ 0x40a0, 283, },
{ 0x41c0, 282, },
{ 0x42f0, 281, },
{ 0x44a0, 280, },
{ 0x4600, 279, },
{ 0x47b0, 278, },
{ 0x4900, 277, },
{ 0x4a00, 276, },
{ 0x4ba0, 275, },
{ 0x4d00, 274, },
{ 0x4f00, 273, },
{ 0x5000, 272, },
{ 0x51f0, 272, },
{ 0x53a0, 270, },
{ 0x5520, 269, },
{ 0x5700, 268, },
{ 0x5800, 267, },
{ 0x5a00, 266, },
{ 0x5c00, 265, },
{ 0x5d00, 264, },
{ 0x5f00, 263, },
{ 0x6000, 262, },
{ 0x6200, 261, },
{ 0x6400, 260, },
{ 0xffff, 0, },
};
/* 8 bit registers, 16 bit values */
static int s5h1411_writereg(struct s5h1411_state *state,
u8 addr, u8 reg, u16 data)
{
int ret;
u8 buf[] = { reg, data >> 8, data & 0xff };
struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = 3 };
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1)
printk(KERN_ERR "%s: writereg error 0x%02x 0x%02x 0x%04x, "
"ret == %i)\n", __func__, addr, reg, data, ret);
return (ret != 1) ? -1 : 0;
}
static u16 s5h1411_readreg(struct s5h1411_state *state, u8 addr, u8 reg)
{
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0, 0 };
struct i2c_msg msg[] = {
{ .addr = addr, .flags = 0, .buf = b0, .len = 1 },
{ .addr = addr, .flags = I2C_M_RD, .buf = b1, .len = 2 } };
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2)
printk(KERN_ERR "%s: readreg error (ret == %i)\n",
__func__, ret);
return (b1[0] << 8) | b1[1];
}
static int s5h1411_softreset(struct dvb_frontend *fe)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf7, 0);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf7, 1);
return 0;
}
static int s5h1411_set_if_freq(struct dvb_frontend *fe, int KHz)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s(%d KHz)\n", __func__, KHz);
switch (KHz) {
case 3250:
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x10d5);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x5342);
s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x10d9);
break;
case 3500:
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1225);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x1e96);
s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x1225);
break;
case 4000:
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x14bc);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0xb53e);
s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x14bd);
break;
default:
dprintk("%s(%d KHz) Invalid, defaulting to 5380\n",
__func__, KHz);
/* no break, need to continue */
case 5380:
case 44000:
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1be4);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x39, 0x3655);
s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x2c, 0x1be4);
break;
}
state->if_freq = KHz;
return 0;
}
static int s5h1411_set_mpeg_timing(struct dvb_frontend *fe, int mode)
{
struct s5h1411_state *state = fe->demodulator_priv;
u16 val;
dprintk("%s(%d)\n", __func__, mode);
val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbe) & 0xcfff;
switch (mode) {
case S5H1411_MPEGTIMING_CONTINOUS_INVERTING_CLOCK:
val |= 0x0000;
break;
case S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK:
dprintk("%s(%d) Mode1 or Defaulting\n", __func__, mode);
val |= 0x1000;
break;
case S5H1411_MPEGTIMING_NONCONTINOUS_INVERTING_CLOCK:
val |= 0x2000;
break;
case S5H1411_MPEGTIMING_NONCONTINOUS_NONINVERTING_CLOCK:
val |= 0x3000;
break;
default:
return -EINVAL;
}
/* Configure MPEG Signal Timing charactistics */
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbe, val);
}
static int s5h1411_set_spectralinversion(struct dvb_frontend *fe, int inversion)
{
struct s5h1411_state *state = fe->demodulator_priv;
u16 val;
dprintk("%s(%d)\n", __func__, inversion);
val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x24) & ~0x1000;
if (inversion == 1)
val |= 0x1000; /* Inverted */
state->inversion = inversion;
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x24, val);
}
static int s5h1411_set_serialmode(struct dvb_frontend *fe, int serial)
{
struct s5h1411_state *state = fe->demodulator_priv;
u16 val;
dprintk("%s(%d)\n", __func__, serial);
val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbd) & ~0x100;
if (serial == 1)
val |= 0x100;
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, val);
}
static int s5h1411_enable_modulation(struct dvb_frontend *fe,
fe_modulation_t m)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s(0x%08x)\n", __func__, m);
if ((state->first_tune == 0) && (m == state->current_modulation)) {
dprintk("%s() Already at desired modulation. Skipping...\n",
__func__);
return 0;
}
switch (m) {
case VSB_8:
dprintk("%s() VSB_8\n", __func__);
s5h1411_set_if_freq(fe, state->config->vsb_if);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x00, 0x71);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf6, 0x00);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xcd, 0xf1);
break;
case QAM_64:
case QAM_256:
case QAM_AUTO:
dprintk("%s() QAM_AUTO (64/256)\n", __func__);
s5h1411_set_if_freq(fe, state->config->qam_if);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x00, 0x0171);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf6, 0x0001);
s5h1411_writereg(state, S5H1411_I2C_QAM_ADDR, 0x16, 0x1101);
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xcd, 0x00f0);
break;
default:
dprintk("%s() Invalid modulation\n", __func__);
return -EINVAL;
}
state->current_modulation = m;
state->first_tune = 0;
s5h1411_softreset(fe);
return 0;
}
static int s5h1411_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s(%d)\n", __func__, enable);
if (enable)
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 1);
else
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 0);
}
static int s5h1411_set_gpio(struct dvb_frontend *fe, int enable)
{
struct s5h1411_state *state = fe->demodulator_priv;
u16 val;
dprintk("%s(%d)\n", __func__, enable);
val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xe0) & ~0x02;
if (enable)
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0,
val | 0x02);
else
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0, val);
}
static int s5h1411_set_powerstate(struct dvb_frontend *fe, int enable)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s(%d)\n", __func__, enable);
if (enable)
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf4, 1);
else {
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf4, 0);
s5h1411_softreset(fe);
}
return 0;
}
static int s5h1411_sleep(struct dvb_frontend *fe)
{
return s5h1411_set_powerstate(fe, 1);
}
static int s5h1411_register_reset(struct dvb_frontend *fe)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf3, 0);
}
/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
static int s5h1411_set_frontend(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct s5h1411_state *state = fe->demodulator_priv;
dprintk("%s(frequency=%d)\n", __func__, p->frequency);
s5h1411_softreset(fe);
state->current_frequency = p->frequency;
s5h1411_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);
}
/* Issue a reset to the demod so it knows to resync against the
newly tuned frequency */
s5h1411_softreset(fe);
return 0;
}
/* Reset the demod hardware and reset all of the configuration registers
to a default state. */
static int s5h1411_init(struct dvb_frontend *fe)
{
struct s5h1411_state *state = fe->demodulator_priv;
int i;
dprintk("%s()\n", __func__);
s5h1411_set_powerstate(fe, 0);
s5h1411_register_reset(fe);
for (i = 0; i < ARRAY_SIZE(init_tab); i++)
s5h1411_writereg(state, init_tab[i].addr,
init_tab[i].reg,
init_tab[i].data);
/* The datasheet says that after initialisation, VSB is default */
state->current_modulation = VSB_8;
/* Although the datasheet says it's in VSB, empirical evidence
shows problems getting lock on the first tuning request. Make
sure we call enable_modulation the first time around */
state->first_tune = 1;
if (state->config->output_mode == S5H1411_SERIAL_OUTPUT)
/* Serial */
s5h1411_set_serialmode(fe, 1);
else
/* Parallel */
s5h1411_set_serialmode(fe, 0);
s5h1411_set_spectralinversion(fe, state->config->inversion);
s5h1411_set_if_freq(fe, state->config->vsb_if);
s5h1411_set_gpio(fe, state->config->gpio);
s5h1411_set_mpeg_timing(fe, state->config->mpeg_timing);
s5h1411_softreset(fe);
/* Note: Leaving the I2C gate closed. */
s5h1411_i2c_gate_ctrl(fe, 0);
return 0;
}
static int s5h1411_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct s5h1411_state *state = fe->demodulator_priv;
u16 reg;
u32 tuner_status = 0;
*status = 0;
/* Register F2 bit 15 = Master Lock, removed */
switch (state->current_modulation) {
case QAM_64:
case QAM_256:
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf0);
if (reg & 0x10) /* QAM FEC Lock */
*status |= FE_HAS_SYNC | FE_HAS_LOCK;
if (reg & 0x100) /* QAM EQ Lock */
*status |= FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL;
break;
case VSB_8:
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf2);
if (reg & 0x1000) /* FEC Lock */
*status |= FE_HAS_SYNC | FE_HAS_LOCK;
if (reg & 0x2000) /* EQ Lock */
*status |= FE_HAS_VITERBI | FE_HAS_CARRIER | FE_HAS_SIGNAL;
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x53);
if (reg & 0x1) /* AFC Lock */
*status |= FE_HAS_SIGNAL;
break;
default:
return -EINVAL;
}
switch (state->config->status_mode) {
case S5H1411_DEMODLOCKING:
if (*status & FE_HAS_VITERBI)
*status |= FE_HAS_CARRIER | FE_HAS_SIGNAL;
break;
case S5H1411_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 s5h1411_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 s5h1411_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 s5h1411_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 s5h1411_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct s5h1411_state *state = fe->demodulator_priv;
u16 reg;
dprintk("%s()\n", __func__);
switch (state->current_modulation) {
case QAM_64:
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf1);
return s5h1411_qam64_lookup_snr(fe, snr, reg);
case QAM_256:
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xf1);
return s5h1411_qam256_lookup_snr(fe, snr, reg);
case VSB_8:
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR,
0xf2) & 0x3ff;
return s5h1411_vsb_lookup_snr(fe, snr, reg);
default:
break;
}
return -EINVAL;
}
static int s5h1411_read_signal_strength(struct dvb_frontend *fe,
u16 *signal_strength)
{
return s5h1411_read_snr(fe, signal_strength);
}
static int s5h1411_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct s5h1411_state *state = fe->demodulator_priv;
*ucblocks = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xc9);
return 0;
}
static int s5h1411_read_ber(struct dvb_frontend *fe, u32 *ber)
{
return s5h1411_read_ucblocks(fe, ber);
}
static int s5h1411_get_frontend(struct dvb_frontend *fe,
struct dvb_frontend_parameters *p)
{
struct s5h1411_state *state = fe->demodulator_priv;
p->frequency = state->current_frequency;
p->u.vsb.modulation = state->current_modulation;
return 0;
}
static int s5h1411_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1000;
return 0;
}
static void s5h1411_release(struct dvb_frontend *fe)
{
struct s5h1411_state *state = fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops s5h1411_ops;
struct dvb_frontend *s5h1411_attach(const struct s5h1411_config *config,
struct i2c_adapter *i2c)
{
struct s5h1411_state *state = NULL;
u16 reg;
/* allocate memory for the internal state */
state = kmalloc(sizeof(struct s5h1411_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
state->current_modulation = VSB_8;
state->inversion = state->config->inversion;
/* check if the demod exists */
reg = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0x05);
if (reg != 0x0066)
goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &s5h1411_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
if (s5h1411_init(&state->frontend) != 0) {
printk(KERN_ERR "%s: Failed to initialize correctly\n",
__func__);
goto error;
}
/* Note: Leaving the I2C gate open here. */
s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xf5, 1);
/* Put the device into low-power mode until first use */
s5h1411_set_powerstate(&state->frontend, 1);
return &state->frontend;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(s5h1411_attach);
static struct dvb_frontend_ops s5h1411_ops = {
.info = {
.name = "Samsung S5H1411 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 = s5h1411_init,
.sleep = s5h1411_sleep,
.i2c_gate_ctrl = s5h1411_i2c_gate_ctrl,
.set_frontend = s5h1411_set_frontend,
.get_frontend = s5h1411_get_frontend,
.get_tune_settings = s5h1411_get_tune_settings,
.read_status = s5h1411_read_status,
.read_ber = s5h1411_read_ber,
.read_signal_strength = s5h1411_read_signal_strength,
.read_snr = s5h1411_read_snr,
.read_ucblocks = s5h1411_read_ucblocks,
.release = s5h1411_release,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable verbose debug messages");
MODULE_DESCRIPTION("Samsung S5H1411 QAM-B/ATSC Demodulator driver");
MODULE_AUTHOR("Steven Toth");
MODULE_LICENSE("GPL");
/*
* Local variables:
* c-basic-offset: 8
*/