[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / media / dvb / pt1 / va1j5jf8007t.c

/*
 * ISDB-T driver for VA1J5JF8007/VA1J5JF8011
 *
 * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
 *
 * based on pt1dvr - http://pt1dvr.sourceforge.jp/
 * 	by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
 *
 * 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/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include "dvb_frontend.h"
#include "dvb_math.h"
#include "va1j5jf8007t.h"

enum va1j5jf8007t_tune_state {
	VA1J5JF8007T_IDLE,
	VA1J5JF8007T_SET_FREQUENCY,
	VA1J5JF8007T_CHECK_FREQUENCY,
	VA1J5JF8007T_SET_MODULATION,
	VA1J5JF8007T_CHECK_MODULATION,
	VA1J5JF8007T_TRACK,
	VA1J5JF8007T_ABORT,
};

struct va1j5jf8007t_state {
	const struct va1j5jf8007t_config *config;
	struct i2c_adapter *adap;
	struct dvb_frontend fe;
	enum va1j5jf8007t_tune_state tune_state;
};

static int va1j5jf8007t_read_snr(struct dvb_frontend *fe, u16 *snr)
{
	struct va1j5jf8007t_state *state;
	u8 addr;
	int i;
	u8 write_buf[1], read_buf[1];
	struct i2c_msg msgs[2];
	s32 word, x, y;

	state = fe->demodulator_priv;
	addr = state->config->demod_address;

	word = 0;
	for (i = 0; i < 3; i++) {
		write_buf[0] = 0x8b + i;

		msgs[0].addr = addr;
		msgs[0].flags = 0;
		msgs[0].len = sizeof(write_buf);
		msgs[0].buf = write_buf;

		msgs[1].addr = addr;
		msgs[1].flags = I2C_M_RD;
		msgs[1].len = sizeof(read_buf);
		msgs[1].buf = read_buf;

		if (i2c_transfer(state->adap, msgs, 2) != 2)
			return -EREMOTEIO;

		word <<= 8;
		word |= read_buf[0];
	}

	if (!word)
		return -EIO;

	x = 10 * (intlog10(0x540000 * 100 / word) - (2 << 24));
	y = (24ll << 46) / 1000000;
	y = ((s64)y * x >> 30) - (16ll << 40) / 10000;
	y = ((s64)y * x >> 29) + (398ll << 35) / 10000;
	y = ((s64)y * x >> 30) + (5491ll << 29) / 10000;
	y = ((s64)y * x >> 30) + (30965ll << 23) / 10000;
	*snr = y >> 15;
	return 0;
}

static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
{
	return DVBFE_ALGO_HW;
}

static int
va1j5jf8007t_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
	struct va1j5jf8007t_state *state;

	state = fe->demodulator_priv;

	switch (state->tune_state) {
	case VA1J5JF8007T_IDLE:
	case VA1J5JF8007T_SET_FREQUENCY:
	case VA1J5JF8007T_CHECK_FREQUENCY:
		*status = 0;
		return 0;


	case VA1J5JF8007T_SET_MODULATION:
	case VA1J5JF8007T_CHECK_MODULATION:
	case VA1J5JF8007T_ABORT:
		*status |= FE_HAS_SIGNAL;
		return 0;

	case VA1J5JF8007T_TRACK:
		*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
		return 0;
	}

	BUG();
}

struct va1j5jf8007t_cb_map {
	u32 frequency;
	u8 cb;
};

static const struct va1j5jf8007t_cb_map va1j5jf8007t_cb_maps[] = {
	{  90000000, 0x80 },
	{ 140000000, 0x81 },
	{ 170000000, 0xa1 },
	{ 220000000, 0x62 },
	{ 330000000, 0xa2 },
	{ 402000000, 0xe2 },
	{ 450000000, 0x64 },
	{ 550000000, 0x84 },
	{ 600000000, 0xa4 },
	{ 700000000, 0xc4 },
};

static u8 va1j5jf8007t_lookup_cb(u32 frequency)
{
	int i;
	const struct va1j5jf8007t_cb_map *map;

	for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_cb_maps); i++) {
		map = &va1j5jf8007t_cb_maps[i];
		if (frequency < map->frequency)
			return map->cb;
	}
	return 0xe4;
}

static int va1j5jf8007t_set_frequency(struct va1j5jf8007t_state *state)
{
	u32 frequency;
	u16 word;
	u8 buf[6];
	struct i2c_msg msg;

	frequency = state->fe.dtv_property_cache.frequency;

	word = (frequency + 71428) / 142857 + 399;
	buf[0] = 0xfe;
	buf[1] = 0xc2;
	buf[2] = word >> 8;
	buf[3] = word;
	buf[4] = 0x80;
	buf[5] = va1j5jf8007t_lookup_cb(frequency);

	msg.addr = state->config->demod_address;
	msg.flags = 0;
	msg.len = sizeof(buf);
	msg.buf = buf;

	if (i2c_transfer(state->adap, &msg, 1) != 1)
		return -EREMOTEIO;

	return 0;
}

static int
va1j5jf8007t_check_frequency(struct va1j5jf8007t_state *state, int *lock)
{
	u8 addr;
	u8 write_buf[2], read_buf[1];
	struct i2c_msg msgs[2];

	addr = state->config->demod_address;

	write_buf[0] = 0xfe;
	write_buf[1] = 0xc3;

	msgs[0].addr = addr;
	msgs[0].flags = 0;
	msgs[0].len = sizeof(write_buf);
	msgs[0].buf = write_buf;

	msgs[1].addr = addr;
	msgs[1].flags = I2C_M_RD;
	msgs[1].len = sizeof(read_buf);
	msgs[1].buf = read_buf;

	if (i2c_transfer(state->adap, msgs, 2) != 2)
		return -EREMOTEIO;

	*lock = read_buf[0] & 0x40;
	return 0;
}

static int va1j5jf8007t_set_modulation(struct va1j5jf8007t_state *state)
{
	u8 buf[2];
	struct i2c_msg msg;

	buf[0] = 0x01;
	buf[1] = 0x40;

	msg.addr = state->config->demod_address;
	msg.flags = 0;
	msg.len = sizeof(buf);
	msg.buf = buf;

	if (i2c_transfer(state->adap, &msg, 1) != 1)
		return -EREMOTEIO;

	return 0;
}

static int va1j5jf8007t_check_modulation(struct va1j5jf8007t_state *state,
					 int *lock, int *retry)
{
	u8 addr;
	u8 write_buf[1], read_buf[1];
	struct i2c_msg msgs[2];

	addr = state->config->demod_address;

	write_buf[0] = 0x80;

	msgs[0].addr = addr;
	msgs[0].flags = 0;
	msgs[0].len = sizeof(write_buf);
	msgs[0].buf = write_buf;

	msgs[1].addr = addr;
	msgs[1].flags = I2C_M_RD;
	msgs[1].len = sizeof(read_buf);
	msgs[1].buf = read_buf;

	if (i2c_transfer(state->adap, msgs, 2) != 2)
		return -EREMOTEIO;

	*lock = !(read_buf[0] & 0x10);
	*retry = read_buf[0] & 0x80;
	return 0;
}

static int
va1j5jf8007t_tune(struct dvb_frontend *fe,
		  struct dvb_frontend_parameters *params,
		  unsigned int mode_flags,  unsigned int *delay,
		  fe_status_t *status)
{
	struct va1j5jf8007t_state *state;
	int ret;
	int lock = 0, retry = 0;

	state = fe->demodulator_priv;

	if (params != NULL)
		state->tune_state = VA1J5JF8007T_SET_FREQUENCY;

	switch (state->tune_state) {
	case VA1J5JF8007T_IDLE:
		*delay = 3 * HZ;
		*status = 0;
		return 0;

	case VA1J5JF8007T_SET_FREQUENCY:
		ret = va1j5jf8007t_set_frequency(state);
		if (ret < 0)
			return ret;

		state->tune_state = VA1J5JF8007T_CHECK_FREQUENCY;
		*delay = 0;
		*status = 0;
		return 0;

	case VA1J5JF8007T_CHECK_FREQUENCY:
		ret = va1j5jf8007t_check_frequency(state, &lock);
		if (ret < 0)
			return ret;

		if (!lock)  {
			*delay = (HZ + 999) / 1000;
			*status = 0;
			return 0;
		}

		state->tune_state = VA1J5JF8007T_SET_MODULATION;
		*delay = 0;
		*status = FE_HAS_SIGNAL;
		return 0;

	case VA1J5JF8007T_SET_MODULATION:
		ret = va1j5jf8007t_set_modulation(state);
		if (ret < 0)
			return ret;

		state->tune_state = VA1J5JF8007T_CHECK_MODULATION;
		*delay = 0;
		*status = FE_HAS_SIGNAL;
		return 0;

	case VA1J5JF8007T_CHECK_MODULATION:
		ret = va1j5jf8007t_check_modulation(state, &lock, &retry);
		if (ret < 0)
			return ret;

		if (!lock)  {
			if (!retry)  {
				state->tune_state = VA1J5JF8007T_ABORT;
				*delay = 3 * HZ;
				*status = FE_HAS_SIGNAL;
				return 0;
			}
			*delay = (HZ + 999) / 1000;
			*status = FE_HAS_SIGNAL;
			return 0;
		}

		state->tune_state = VA1J5JF8007T_TRACK;
		/* fall through */

	case VA1J5JF8007T_TRACK:
		*delay = 3 * HZ;
		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
		return 0;

	case VA1J5JF8007T_ABORT:
		*delay = 3 * HZ;
		*status = FE_HAS_SIGNAL;
		return 0;
	}

	BUG();
}

static int va1j5jf8007t_init_frequency(struct va1j5jf8007t_state *state)
{
	u8 buf[7];
	struct i2c_msg msg;

	buf[0] = 0xfe;
	buf[1] = 0xc2;
	buf[2] = 0x01;
	buf[3] = 0x8f;
	buf[4] = 0xc1;
	buf[5] = 0x80;
	buf[6] = 0x80;

	msg.addr = state->config->demod_address;
	msg.flags = 0;
	msg.len = sizeof(buf);
	msg.buf = buf;

	if (i2c_transfer(state->adap, &msg, 1) != 1)
		return -EREMOTEIO;

	return 0;
}

static int va1j5jf8007t_set_sleep(struct va1j5jf8007t_state *state, int sleep)
{
	u8 buf[2];
	struct i2c_msg msg;

	buf[0] = 0x03;
	buf[1] = sleep ? 0x90 : 0x80;

	msg.addr = state->config->demod_address;
	msg.flags = 0;
	msg.len = sizeof(buf);
	msg.buf = buf;

	if (i2c_transfer(state->adap, &msg, 1) != 1)
		return -EREMOTEIO;

	return 0;
}

static int va1j5jf8007t_sleep(struct dvb_frontend *fe)
{
	struct va1j5jf8007t_state *state;
	int ret;

	state = fe->demodulator_priv;

	ret = va1j5jf8007t_init_frequency(state);
	if (ret < 0)
		return ret;

	return va1j5jf8007t_set_sleep(state, 1);
}

static int va1j5jf8007t_init(struct dvb_frontend *fe)
{
	struct va1j5jf8007t_state *state;

	state = fe->demodulator_priv;
	state->tune_state = VA1J5JF8007T_IDLE;

	return va1j5jf8007t_set_sleep(state, 0);
}

static void va1j5jf8007t_release(struct dvb_frontend *fe)
{
	struct va1j5jf8007t_state *state;
	state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops va1j5jf8007t_ops = {
	.info = {
		.name = "VA1J5JF8007/VA1J5JF8011 ISDB-T",
		.type = FE_OFDM,
		.frequency_min = 90000000,
		.frequency_max = 770000000,
		.frequency_stepsize = 142857,
		.caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
			FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
			FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
	},

	.read_snr = va1j5jf8007t_read_snr,
	.get_frontend_algo = va1j5jf8007t_get_frontend_algo,
	.read_status = va1j5jf8007t_read_status,
	.tune = va1j5jf8007t_tune,
	.sleep = va1j5jf8007t_sleep,
	.init = va1j5jf8007t_init,
	.release = va1j5jf8007t_release,
};

static const u8 va1j5jf8007t_20mhz_prepare_bufs[][2] = {
	{0x03, 0x90}, {0x14, 0x8f}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2},
	{0x22, 0x83}, {0x31, 0x0d}, {0x32, 0xe0}, {0x39, 0xd3}, {0x3a, 0x00},
	{0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x02}, {0x76, 0x4e}, {0x77, 0x03},
	{0xef, 0x01}
};

static const u8 va1j5jf8007t_25mhz_prepare_bufs[][2] = {
	{0x03, 0x90}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2}, {0x22, 0x83},
	{0x3a, 0x00}, {0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x0a}, {0x76, 0x4c},
	{0x77, 0x03}, {0xef, 0x01}
};

int va1j5jf8007t_prepare(struct dvb_frontend *fe)
{
	struct va1j5jf8007t_state *state;
	const u8 (*bufs)[2];
	int size;
	u8 buf[2];
	struct i2c_msg msg;
	int i;

	state = fe->demodulator_priv;

	switch (state->config->frequency) {
	case VA1J5JF8007T_20MHZ:
		bufs = va1j5jf8007t_20mhz_prepare_bufs;
		size = ARRAY_SIZE(va1j5jf8007t_20mhz_prepare_bufs);
		break;
	case VA1J5JF8007T_25MHZ:
		bufs = va1j5jf8007t_25mhz_prepare_bufs;
		size = ARRAY_SIZE(va1j5jf8007t_25mhz_prepare_bufs);
		break;
	default:
		return -EINVAL;
	}

	msg.addr = state->config->demod_address;
	msg.flags = 0;
	msg.len = sizeof(buf);
	msg.buf = buf;

	for (i = 0; i < size; i++) {
		memcpy(buf, bufs[i], sizeof(buf));
		if (i2c_transfer(state->adap, &msg, 1) != 1)
			return -EREMOTEIO;
	}

	return va1j5jf8007t_init_frequency(state);
}

struct dvb_frontend *
va1j5jf8007t_attach(const struct va1j5jf8007t_config *config,
		    struct i2c_adapter *adap)
{
	struct va1j5jf8007t_state *state;
	struct dvb_frontend *fe;
	u8 buf[2];
	struct i2c_msg msg;

	state = kzalloc(sizeof(struct va1j5jf8007t_state), GFP_KERNEL);
	if (!state)
		return NULL;

	state->config = config;
	state->adap = adap;

	fe = &state->fe;
	memcpy(&fe->ops, &va1j5jf8007t_ops, sizeof(struct dvb_frontend_ops));
	fe->demodulator_priv = state;

	buf[0] = 0x01;
	buf[1] = 0x80;

	msg.addr = state->config->demod_address;
	msg.flags = 0;
	msg.len = sizeof(buf);
	msg.buf = buf;

	if (i2c_transfer(state->adap, &msg, 1) != 1) {
		kfree(state);
		return NULL;
	}

	return fe;
}
Commit	Line	Data
3d17fb1b	1	/*
4d1f413e	2	* ISDB-T driver for VA1J5JF8007/VA1J5JF8011
3d17fb1b MCC	3	*
	4	* Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
	5	*
	6	* based on pt1dvr - http://pt1dvr.sourceforge.jp/
	7	* by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*/
	23
	24	#include <linux/kernel.h>
	25	#include <linux/module.h>
	26	#include <linux/slab.h>
	27	#include <linux/i2c.h>
	28	#include "dvb_frontend.h"
	29	#include "dvb_math.h"
	30	#include "va1j5jf8007t.h"
	31
	32	enum va1j5jf8007t_tune_state {
	33	VA1J5JF8007T_IDLE,
	34	VA1J5JF8007T_SET_FREQUENCY,
	35	VA1J5JF8007T_CHECK_FREQUENCY,
	36	VA1J5JF8007T_SET_MODULATION,
	37	VA1J5JF8007T_CHECK_MODULATION,
	38	VA1J5JF8007T_TRACK,
	39	VA1J5JF8007T_ABORT,
	40	};
	41
	42	struct va1j5jf8007t_state {
	43	const struct va1j5jf8007t_config *config;
	44	struct i2c_adapter *adap;
	45	struct dvb_frontend fe;
	46	enum va1j5jf8007t_tune_state tune_state;
	47	};
	48
c4c1e295	49	static int va1j5jf8007t_read_snr(struct dvb_frontend fe, u16 snr)
	50	{
	51	struct va1j5jf8007t_state *state;
	52	u8 addr;
	53	int i;
	54	u8 write_buf[1], read_buf[1];
	55	struct i2c_msg msgs[2];
	56	s32 word, x, y;
	57
	58	state = fe->demodulator_priv;
	59	addr = state->config->demod_address;
	60
	61	word = 0;
	62	for (i = 0; i < 3; i++) {
	63	write_buf[0] = 0x8b + i;
	64
	65	msgs[0].addr = addr;
	66	msgs[0].flags = 0;
	67	msgs[0].len = sizeof(write_buf);
	68	msgs[0].buf = write_buf;
	69
	70	msgs[1].addr = addr;
	71	msgs[1].flags = I2C_M_RD;
	72	msgs[1].len = sizeof(read_buf);
	73	msgs[1].buf = read_buf;
	74
	75	if (i2c_transfer(state->adap, msgs, 2) != 2)
	76	return -EREMOTEIO;
	77
	78	word <<= 8;
	79	word \|= read_buf[0];
	80	}
	81
	82	if (!word)
	83	return -EIO;
	84
	85	x = 10 * (intlog10(0x540000 * 100 / word) - (2 << 24));
	86	y = (24ll << 46) / 1000000;
	87	y = ((s64)y * x >> 30) - (16ll << 40) / 10000;
	88	y = ((s64)y * x >> 29) + (398ll << 35) / 10000;
	89	y = ((s64)y * x >> 30) + (5491ll << 29) / 10000;
	90	y = ((s64)y * x >> 30) + (30965ll << 23) / 10000;
	91	*snr = y >> 15;
	92	return 0;
	93	}
	94
3d17fb1b MCC	95	static int va1j5jf8007t_get_frontend_algo(struct dvb_frontend *fe)
	96	{
	97	return DVBFE_ALGO_HW;
	98	}
	99
	100	static int
	101	va1j5jf8007t_read_status(struct dvb_frontend fe, fe_status_t status)
	102	{
	103	struct va1j5jf8007t_state *state;
	104
	105	state = fe->demodulator_priv;
	106
	107	switch (state->tune_state) {
	108	case VA1J5JF8007T_IDLE:
	109	case VA1J5JF8007T_SET_FREQUENCY:
	110	case VA1J5JF8007T_CHECK_FREQUENCY:
	111	*status = 0;
	112	return 0;
	113
	114
	115	case VA1J5JF8007T_SET_MODULATION:
	116	case VA1J5JF8007T_CHECK_MODULATION:
	117	case VA1J5JF8007T_ABORT:
	118	*status \|= FE_HAS_SIGNAL;
	119	return 0;
	120
	121	case VA1J5JF8007T_TRACK:
	122	*status \|= FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_LOCK;
	123	return 0;
	124	}
	125
	126	BUG();
	127	}
	128
	129	struct va1j5jf8007t_cb_map {
	130	u32 frequency;
	131	u8 cb;
	132	};
	133
	134	static const struct va1j5jf8007t_cb_map va1j5jf8007t_cb_maps[] = {
	135	{ 90000000, 0x80 },
	136	{ 140000000, 0x81 },
	137	{ 170000000, 0xa1 },
	138	{ 220000000, 0x62 },
	139	{ 330000000, 0xa2 },
	140	{ 402000000, 0xe2 },
	141	{ 450000000, 0x64 },
	142	{ 550000000, 0x84 },
	143	{ 600000000, 0xa4 },
	144	{ 700000000, 0xc4 },
	145	};
	146
	147	static u8 va1j5jf8007t_lookup_cb(u32 frequency)
	148	{
	149	int i;
	150	const struct va1j5jf8007t_cb_map *map;
	151
	152	for (i = 0; i < ARRAY_SIZE(va1j5jf8007t_cb_maps); i++) {
	153	map = &va1j5jf8007t_cb_maps[i];
	154	if (frequency < map->frequency)
	155	return map->cb;
	156	}
	157	return 0xe4;
	158	}
159
160	static int va1j5jf8007t_set_frequency(struct va1j5jf8007t_state *state)
161	{
162	u32 frequency;
163	u16 word;
164	u8 buf[6];
165	struct i2c_msg msg;
166
167	frequency = state->fe.dtv_property_cache.frequency;
168
169	word = (frequency + 71428) / 142857 + 399;
170	buf[0] = 0xfe;
171	buf[1] = 0xc2;
172	buf[2] = word >> 8;
173	buf[3] = word;
174	buf[4] = 0x80;
175	buf[5] = va1j5jf8007t_lookup_cb(frequency);
176
177	msg.addr = state->config->demod_address;
178	msg.flags = 0;
179	msg.len = sizeof(buf);
180	msg.buf = buf;
181
182	if (i2c_transfer(state->adap, &msg, 1) != 1)
183	return -EREMOTEIO;
184
185	return 0;
186	}
187
188	static int
189	va1j5jf8007t_check_frequency(struct va1j5jf8007t_state state, int lock)
190	{
191	u8 addr;
192	u8 write_buf[2], read_buf[1];
193	struct i2c_msg msgs[2];
194
195	addr = state->config->demod_address;
196
197	write_buf[0] = 0xfe;
198	write_buf[1] = 0xc3;
199
200	msgs[0].addr = addr;
201	msgs[0].flags = 0;
202	msgs[0].len = sizeof(write_buf);
203	msgs[0].buf = write_buf;
204
205	msgs[1].addr = addr;
206	msgs[1].flags = I2C_M_RD;
207	msgs[1].len = sizeof(read_buf);
208	msgs[1].buf = read_buf;
209
210	if (i2c_transfer(state->adap, msgs, 2) != 2)
211	return -EREMOTEIO;
212
213	*lock = read_buf[0] & 0x40;
214	return 0;
215	}
216
217	static int va1j5jf8007t_set_modulation(struct va1j5jf8007t_state *state)
218	{
219	u8 buf[2];
220	struct i2c_msg msg;
221
222	buf[0] = 0x01;
223	buf[1] = 0x40;
224
225	msg.addr = state->config->demod_address;
226	msg.flags = 0;
227	msg.len = sizeof(buf);
228	msg.buf = buf;
229
230	if (i2c_transfer(state->adap, &msg, 1) != 1)
231	return -EREMOTEIO;
232
233	return 0;
234	}
235
236	static int va1j5jf8007t_check_modulation(struct va1j5jf8007t_state *state,
237	int lock, int retry)
238	{
239	u8 addr;
240	u8 write_buf[1], read_buf[1];
241	struct i2c_msg msgs[2];
242
243	addr = state->config->demod_address;
244
245	write_buf[0] = 0x80;
246
247	msgs[0].addr = addr;
248	msgs[0].flags = 0;
249	msgs[0].len = sizeof(write_buf);
250	msgs[0].buf = write_buf;
251
252	msgs[1].addr = addr;
253	msgs[1].flags = I2C_M_RD;
254	msgs[1].len = sizeof(read_buf);
255	msgs[1].buf = read_buf;
256
257	if (i2c_transfer(state->adap, msgs, 2) != 2)
258	return -EREMOTEIO;
259
260	*lock = !(read_buf[0] & 0x10);
261	*retry = read_buf[0] & 0x80;
262	return 0;
263	}
264
265	static int
266	va1j5jf8007t_tune(struct dvb_frontend *fe,
267	struct dvb_frontend_parameters *params,
268	unsigned int mode_flags, unsigned int *delay,
269	fe_status_t *status)
270	{
271	struct va1j5jf8007t_state *state;
272	int ret;
289a774b	273	int lock = 0, retry = 0;
3d17fb1b MCC	274
	275	state = fe->demodulator_priv;
	276
	277	if (params != NULL)
	278	state->tune_state = VA1J5JF8007T_SET_FREQUENCY;
	279
	280	switch (state->tune_state) {
	281	case VA1J5JF8007T_IDLE:
	282	delay = 3 HZ;
	283	*status = 0;
	284	return 0;
	285
	286	case VA1J5JF8007T_SET_FREQUENCY:
	287	ret = va1j5jf8007t_set_frequency(state);
	288	if (ret < 0)
	289	return ret;
	290
	291	state->tune_state = VA1J5JF8007T_CHECK_FREQUENCY;
	292	*delay = 0;
	293	*status = 0;
	294	return 0;
	295
	296	case VA1J5JF8007T_CHECK_FREQUENCY:
	297	ret = va1j5jf8007t_check_frequency(state, &lock);
	298	if (ret < 0)
	299	return ret;
	300
	301	if (!lock) {
	302	*delay = (HZ + 999) / 1000;
	303	*status = 0;
	304	return 0;
	305	}
	306
	307	state->tune_state = VA1J5JF8007T_SET_MODULATION;
	308	*delay = 0;
	309	*status = FE_HAS_SIGNAL;
	310	return 0;
	311
	312	case VA1J5JF8007T_SET_MODULATION:
	313	ret = va1j5jf8007t_set_modulation(state);
	314	if (ret < 0)
	315	return ret;
	316
	317	state->tune_state = VA1J5JF8007T_CHECK_MODULATION;
	318	*delay = 0;
	319	*status = FE_HAS_SIGNAL;
	320	return 0;
	321
	322	case VA1J5JF8007T_CHECK_MODULATION:
	323	ret = va1j5jf8007t_check_modulation(state, &lock, &retry);
	324	if (ret < 0)
	325	return ret;
	326
	327	if (!lock) {
	328	if (!retry) {
	329	state->tune_state = VA1J5JF8007T_ABORT;
	330	delay = 3 HZ;
	331	*status = FE_HAS_SIGNAL;
	332	return 0;
	333	}
	334	*delay = (HZ + 999) / 1000;
	335	*status = FE_HAS_SIGNAL;
	336	return 0;
	337	}
338
339	state->tune_state = VA1J5JF8007T_TRACK;
340	/* fall through */
341
342	case VA1J5JF8007T_TRACK:
343	delay = 3 HZ;
344	*status = FE_HAS_SIGNAL \| FE_HAS_CARRIER \| FE_HAS_LOCK;
345	return 0;
346
347	case VA1J5JF8007T_ABORT:
348	delay = 3 HZ;
349	*status = FE_HAS_SIGNAL;
350	return 0;
351	}
352
353	BUG();
354	}
355
356	static int va1j5jf8007t_init_frequency(struct va1j5jf8007t_state *state)
357	{
358	u8 buf[7];
359	struct i2c_msg msg;
360
361	buf[0] = 0xfe;
362	buf[1] = 0xc2;
363	buf[2] = 0x01;
364	buf[3] = 0x8f;
365	buf[4] = 0xc1;
366	buf[5] = 0x80;
367	buf[6] = 0x80;
368
369	msg.addr = state->config->demod_address;
370	msg.flags = 0;
371	msg.len = sizeof(buf);
372	msg.buf = buf;
373
374	if (i2c_transfer(state->adap, &msg, 1) != 1)
375	return -EREMOTEIO;
376
377	return 0;
378	}
379
380	static int va1j5jf8007t_set_sleep(struct va1j5jf8007t_state *state, int sleep)
381	{
382	u8 buf[2];
383	struct i2c_msg msg;
384
385	buf[0] = 0x03;
386	buf[1] = sleep ? 0x90 : 0x80;
387
388	msg.addr = state->config->demod_address;
389	msg.flags = 0;
390	msg.len = sizeof(buf);
391	msg.buf = buf;
392
393	if (i2c_transfer(state->adap, &msg, 1) != 1)
394	return -EREMOTEIO;
395
396	return 0;
397	}
398
399	static int va1j5jf8007t_sleep(struct dvb_frontend *fe)
400	{
401	struct va1j5jf8007t_state *state;
402	int ret;
403
404	state = fe->demodulator_priv;
405
406	ret = va1j5jf8007t_init_frequency(state);
407	if (ret < 0)
408	return ret;
409
410	return va1j5jf8007t_set_sleep(state, 1);
411	}
412
413	static int va1j5jf8007t_init(struct dvb_frontend *fe)
414	{
415	struct va1j5jf8007t_state *state;
416
417	state = fe->demodulator_priv;
418	state->tune_state = VA1J5JF8007T_IDLE;
419
420	return va1j5jf8007t_set_sleep(state, 0);
421	}
422
423	static void va1j5jf8007t_release(struct dvb_frontend *fe)
424	{
425	struct va1j5jf8007t_state *state;
426	state = fe->demodulator_priv;
427	kfree(state);
428	}
429
430	static struct dvb_frontend_ops va1j5jf8007t_ops = {
431	.info = {
4d1f413e	432	.name = "VA1J5JF8007/VA1J5JF8011 ISDB-T",
3d17fb1b MCC	433	.type = FE_OFDM,
	434	.frequency_min = 90000000,
	435	.frequency_max = 770000000,
	436	.frequency_stepsize = 142857,
	437	.caps = FE_CAN_INVERSION_AUTO \| FE_CAN_FEC_AUTO \|
	438	FE_CAN_QAM_AUTO \| FE_CAN_TRANSMISSION_MODE_AUTO \|
	439	FE_CAN_GUARD_INTERVAL_AUTO \| FE_CAN_HIERARCHY_AUTO,
	440	},
	441
c4c1e295	442	.read_snr = va1j5jf8007t_read_snr,
3d17fb1b MCC	443	.get_frontend_algo = va1j5jf8007t_get_frontend_algo,
	444	.read_status = va1j5jf8007t_read_status,
	445	.tune = va1j5jf8007t_tune,
	446	.sleep = va1j5jf8007t_sleep,
	447	.init = va1j5jf8007t_init,
	448	.release = va1j5jf8007t_release,
	449	};
	450
4d1f413e	451	static const u8 va1j5jf8007t_20mhz_prepare_bufs[][2] = {
3d17fb1b MCC	452	{0x03, 0x90}, {0x14, 0x8f}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2},
	453	{0x22, 0x83}, {0x31, 0x0d}, {0x32, 0xe0}, {0x39, 0xd3}, {0x3a, 0x00},
	454	{0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x02}, {0x76, 0x4e}, {0x77, 0x03},
	455	{0xef, 0x01}
	456	};
	457
4d1f413e HT	458	static const u8 va1j5jf8007t_25mhz_prepare_bufs[][2] = {
	459	{0x03, 0x90}, {0x1c, 0x2a}, {0x1d, 0xa8}, {0x1e, 0xa2}, {0x22, 0x83},
	460	{0x3a, 0x00}, {0x5c, 0x40}, {0x5f, 0x80}, {0x75, 0x0a}, {0x76, 0x4c},
	461	{0x77, 0x03}, {0xef, 0x01}
	462	};
	463
3d17fb1b MCC	464	int va1j5jf8007t_prepare(struct dvb_frontend *fe)
	465	{
	466	struct va1j5jf8007t_state *state;
4d1f413e HT	467	const u8 (*bufs)[2];
4d1f413e HT	468	int size;
3d17fb1b MCC	469	u8 buf[2];
	470	struct i2c_msg msg;
	471	int i;
	472
	473	state = fe->demodulator_priv;
	474
4d1f413e HT	475	switch (state->config->frequency) {
	476	case VA1J5JF8007T_20MHZ:
	477	bufs = va1j5jf8007t_20mhz_prepare_bufs;
	478	size = ARRAY_SIZE(va1j5jf8007t_20mhz_prepare_bufs);
	479	break;
	480	case VA1J5JF8007T_25MHZ:
	481	bufs = va1j5jf8007t_25mhz_prepare_bufs;
	482	size = ARRAY_SIZE(va1j5jf8007t_25mhz_prepare_bufs);
	483	break;
	484	default:
	485	return -EINVAL;
	486	}
	487
3d17fb1b MCC	488	msg.addr = state->config->demod_address;
	489	msg.flags = 0;
	490	msg.len = sizeof(buf);
	491	msg.buf = buf;
	492
4d1f413e HT	493	for (i = 0; i < size; i++) {
4d1f413e HT	494	memcpy(buf, bufs[i], sizeof(buf));
3d17fb1b MCC	495	if (i2c_transfer(state->adap, &msg, 1) != 1)
	496	return -EREMOTEIO;
	497	}
	498
	499	return va1j5jf8007t_init_frequency(state);
	500	}
	501
	502	struct dvb_frontend *
	503	va1j5jf8007t_attach(const struct va1j5jf8007t_config *config,
	504	struct i2c_adapter *adap)
	505	{
	506	struct va1j5jf8007t_state *state;
	507	struct dvb_frontend *fe;
	508	u8 buf[2];
	509	struct i2c_msg msg;
	510
	511	state = kzalloc(sizeof(struct va1j5jf8007t_state), GFP_KERNEL);
	512	if (!state)
	513	return NULL;
	514
	515	state->config = config;
	516	state->adap = adap;
	517
	518	fe = &state->fe;
	519	memcpy(&fe->ops, &va1j5jf8007t_ops, sizeof(struct dvb_frontend_ops));
	520	fe->demodulator_priv = state;
	521
	522	buf[0] = 0x01;
	523	buf[1] = 0x80;
	524
	525	msg.addr = state->config->demod_address;
	526	msg.flags = 0;
	527	msg.len = sizeof(buf);
	528	msg.buf = buf;
	529
	530	if (i2c_transfer(state->adap, &msg, 1) != 1) {
	531	kfree(state);
	532	return NULL;
	533	}
	534
	535	return fe;
	536	}