s5h1411.c

trident tm5600的linux驱动

/*
    Samsung S5H1411 VSB/QAM demodulator driver

    Copyright (C) 2008 Steven Toth <[e-mail]>

    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;