[deliverable/linux.git] / drivers / media / usb / dvb-usb / friio-fe.c

/* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
 *
 * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
 *
 * This module is based off the the gl861 and vp702x modules.
 *
 * 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, version 2.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>

#include "friio.h"

struct jdvbt90502_state {
	struct i2c_adapter *i2c;
	struct dvb_frontend frontend;
	struct jdvbt90502_config config;
};

/* NOTE: TC90502 has 16bit register-address? */
/* register 0x0100 is used for reading PLL status, so reg is u16 here */
static int jdvbt90502_reg_read(struct jdvbt90502_state *state,
			       const u16 reg, u8 *buf, const size_t count)
{
	int ret;
	u8 wbuf[3];
	struct i2c_msg msg[2];

	wbuf[0] = reg & 0xFF;
	wbuf[1] = 0;
	wbuf[2] = reg >> 8;

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

	msg[1].addr = msg[0].addr;
	msg[1].flags = I2C_M_RD;
	msg[1].buf = buf;
	msg[1].len = count;

	ret = i2c_transfer(state->i2c, msg, 2);
	if (ret != 2) {
		deb_fe(" reg read failed.\n");
		return -EREMOTEIO;
	}
	return 0;
}

/* currently 16bit register-address is not used, so reg is u8 here */
static int jdvbt90502_single_reg_write(struct jdvbt90502_state *state,
				       const u8 reg, const u8 val)
{
	struct i2c_msg msg;
	u8 wbuf[2];

	wbuf[0] = reg;
	wbuf[1] = val;

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

	if (i2c_transfer(state->i2c, &msg, 1) != 1) {
		deb_fe(" reg write failed.");
		return -EREMOTEIO;
	}
	return 0;
}

static int _jdvbt90502_write(struct dvb_frontend *fe, const u8 buf[], int len)
{
	struct jdvbt90502_state *state = fe->demodulator_priv;
	int err, i;
	for (i = 0; i < len - 1; i++) {
		err = jdvbt90502_single_reg_write(state,
						  buf[0] + i, buf[i + 1]);
		if (err)
			return err;
	}

	return 0;
}

/* read pll status byte via the demodulator's I2C register */
/* note: Win box reads it by 8B block at the I2C addr 0x30 from reg:0x80 */
static int jdvbt90502_pll_read(struct jdvbt90502_state *state, u8 *result)
{
	int ret;

	/* +1 for reading */
	u8 pll_addr_byte = (state->config.pll_address << 1) + 1;

	*result = 0;

	ret = jdvbt90502_single_reg_write(state, JDVBT90502_2ND_I2C_REG,
					  pll_addr_byte);
	if (ret)
		goto error;

	ret = jdvbt90502_reg_read(state, 0x0100, result, 1);
	if (ret)
		goto error;

	deb_fe("PLL read val:%02x\n", *result);
	return 0;

error:
	deb_fe("%s:ret == %d\n", __func__, ret);
	return -EREMOTEIO;
}


/* set pll frequency via the demodulator's I2C register */
static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq)
{
	int ret;
	int retry;
	u8 res1;
	u8 res2[9];

	u8 pll_freq_cmd[PLL_CMD_LEN];
	u8 pll_agc_cmd[PLL_CMD_LEN];
	struct i2c_msg msg[2];
	u32 f;

	deb_fe("%s: freq=%d, step=%d\n", __func__, freq,
	       state->frontend.ops.info.frequency_stepsize);
	/* freq -> oscilator frequency conversion. */
	/* freq: 473,000,000 + n*6,000,000 [+ 142857 (center freq. shift)] */
	f = freq / state->frontend.ops.info.frequency_stepsize;
	/* add 399[1/7 MHZ] = 57MHz for the IF  */
	f += 399;
	/* add center frequency shift if necessary */
	if (f % 7 == 0)
		f++;
	pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */
	pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1;
	pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F;
	pll_freq_cmd[DIVIDER_BYTE2] = f & 0xFF;
	pll_freq_cmd[CONTROL_BYTE] = 0xB2; /* ref.divider:28, 4MHz/28=1/7MHz */
	pll_freq_cmd[BANDSWITCH_BYTE] = 0x08;	/* UHF band */

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

	ret = i2c_transfer(state->i2c, &msg[0], 1);
	if (ret != 1)
		goto error;

	udelay(50);

	pll_agc_cmd[DEMOD_REDIRECT_REG] = pll_freq_cmd[DEMOD_REDIRECT_REG];
	pll_agc_cmd[ADDRESS_BYTE] = pll_freq_cmd[ADDRESS_BYTE];
	pll_agc_cmd[DIVIDER_BYTE1] = pll_freq_cmd[DIVIDER_BYTE1];
	pll_agc_cmd[DIVIDER_BYTE2] = pll_freq_cmd[DIVIDER_BYTE2];
	pll_agc_cmd[CONTROL_BYTE] = 0x9A; /*  AGC_CTRL instead of BANDSWITCH */
	pll_agc_cmd[AGC_CTRL_BYTE] = 0x50;
	/* AGC Time Constant 2s, AGC take-over point:103dBuV(lowest) */

	msg[1].addr = msg[0].addr;
	msg[1].flags = 0;
	msg[1].buf = pll_agc_cmd;
	msg[1].len = sizeof(pll_agc_cmd);

	ret = i2c_transfer(state->i2c, &msg[1], 1);
	if (ret != 1)
		goto error;

	/* I don't know what these cmds are for,  */
	/* but the USB log on a windows box contains them */
	ret = jdvbt90502_single_reg_write(state, 0x01, 0x40);
	ret |= jdvbt90502_single_reg_write(state, 0x01, 0x00);
	if (ret)
		goto error;
	udelay(100);

	/* wait for the demod to be ready? */
#define RETRY_COUNT 5
	for (retry = 0; retry < RETRY_COUNT; retry++) {
		ret = jdvbt90502_reg_read(state, 0x0096, &res1, 1);
		if (ret)
			goto error;
		/* if (res1 != 0x00) goto error; */
		ret = jdvbt90502_reg_read(state, 0x00B0, res2, sizeof(res2));
		if (ret)
			goto error;
		if (res2[0] >= 0xA7)
			break;
		msleep(100);
	}
	if (retry >= RETRY_COUNT) {
		deb_fe("%s: FE does not get ready after freq setting.\n",
		       __func__);
		return -EREMOTEIO;
	}

	return 0;
error:
	deb_fe("%s:ret == %d\n", __func__, ret);
	return -EREMOTEIO;
}

static int jdvbt90502_read_status(struct dvb_frontend *fe,
				  enum fe_status *state)
{
	u8 result;
	int ret;

	*state = FE_HAS_SIGNAL;

	ret = jdvbt90502_pll_read(fe->demodulator_priv, &result);
	if (ret) {
		deb_fe("%s:ret == %d\n", __func__, ret);
		return -EREMOTEIO;
	}

	*state = FE_HAS_SIGNAL
		| FE_HAS_CARRIER
		| FE_HAS_VITERBI
		| FE_HAS_SYNC;

	if (result & PLL_STATUS_LOCKED)
		*state |= FE_HAS_LOCK;

	return 0;
}

static int jdvbt90502_read_signal_strength(struct dvb_frontend *fe,
					   u16 *strength)
{
	int ret;
	u8 rbuf[37];

	*strength = 0;

	/* status register (incl. signal strength) : 0x89  */
	/* TODO: read just the necessary registers [0x8B..0x8D]? */
	ret = jdvbt90502_reg_read(fe->demodulator_priv, 0x0089,
				  rbuf, sizeof(rbuf));

	if (ret) {
		deb_fe("%s:ret == %d\n", __func__, ret);
		return -EREMOTEIO;
	}

	/* signal_strength: rbuf[2-4] (24bit BE), use lower 16bit for now. */
	*strength = (rbuf[3] << 8) + rbuf[4];
	if (rbuf[2])
		*strength = 0xffff;

	return 0;
}


/* filter out un-supported properties to notify users */
static int jdvbt90502_set_property(struct dvb_frontend *fe,
				   struct dtv_property *tvp)
{
	int r = 0;

	switch (tvp->cmd) {
	case DTV_DELIVERY_SYSTEM:
		if (tvp->u.data != SYS_ISDBT)
			r = -EINVAL;
		break;
	case DTV_CLEAR:
	case DTV_TUNE:
	case DTV_FREQUENCY:
		break;
	default:
		r = -EINVAL;
	}
	return r;
}

static int jdvbt90502_set_frontend(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;

	/**
	 * NOTE: ignore all the parameters except frequency.
	 *       others should be fixed to the proper value for ISDB-T,
	 *       but don't check here.
	 */

	struct jdvbt90502_state *state = fe->demodulator_priv;
	int ret;

	deb_fe("%s: Freq:%d\n", __func__, p->frequency);

	/* This driver only works on auto mode */
	p->inversion = INVERSION_AUTO;
	p->bandwidth_hz = 6000000;
	p->code_rate_HP = FEC_AUTO;
	p->code_rate_LP = FEC_AUTO;
	p->modulation = QAM_64;
	p->transmission_mode = TRANSMISSION_MODE_AUTO;
	p->guard_interval = GUARD_INTERVAL_AUTO;
	p->hierarchy = HIERARCHY_AUTO;
	p->delivery_system = SYS_ISDBT;

	ret = jdvbt90502_pll_set_freq(state, p->frequency);
	if (ret) {
		deb_fe("%s:ret == %d\n", __func__, ret);
		return -EREMOTEIO;
	}

	return 0;
}


/**
 * (reg, val) commad list to initialize this module.
 *  captured on a Windows box.
 */
static u8 init_code[][2] = {
	{0x01, 0x40},
	{0x04, 0x38},
	{0x05, 0x40},
	{0x07, 0x40},
	{0x0F, 0x4F},
	{0x11, 0x21},
	{0x12, 0x0B},
	{0x13, 0x2F},
	{0x14, 0x31},
	{0x16, 0x02},
	{0x21, 0xC4},
	{0x22, 0x20},
	{0x2C, 0x79},
	{0x2D, 0x34},
	{0x2F, 0x00},
	{0x30, 0x28},
	{0x31, 0x31},
	{0x32, 0xDF},
	{0x38, 0x01},
	{0x39, 0x78},
	{0x3B, 0x33},
	{0x3C, 0x33},
	{0x48, 0x90},
	{0x51, 0x68},
	{0x5E, 0x38},
	{0x71, 0x00},
	{0x72, 0x08},
	{0x77, 0x00},
	{0xC0, 0x21},
	{0xC1, 0x10},
	{0xE4, 0x1A},
	{0xEA, 0x1F},
	{0x77, 0x00},
	{0x71, 0x00},
	{0x71, 0x00},
	{0x76, 0x0C},
};

static const int init_code_len = sizeof(init_code) / sizeof(u8[2]);

static int jdvbt90502_init(struct dvb_frontend *fe)
{
	int i = -1;
	int ret;
	struct i2c_msg msg;

	struct jdvbt90502_state *state = fe->demodulator_priv;

	deb_fe("%s called.\n", __func__);

	msg.addr = state->config.demod_address;
	msg.flags = 0;
	msg.len = 2;
	for (i = 0; i < init_code_len; i++) {
		msg.buf = init_code[i];
		ret = i2c_transfer(state->i2c, &msg, 1);
		if (ret != 1)
			goto error;
	}
	fe->dtv_property_cache.delivery_system = SYS_ISDBT;
	msleep(100);

	return 0;

error:
	deb_fe("%s: init_code[%d] failed. ret==%d\n", __func__, i, ret);
	return -EREMOTEIO;
}


static void jdvbt90502_release(struct dvb_frontend *fe)
{
	struct jdvbt90502_state *state = fe->demodulator_priv;
	kfree(state);
}


static struct dvb_frontend_ops jdvbt90502_ops;

struct dvb_frontend *jdvbt90502_attach(struct dvb_usb_device *d)
{
	struct jdvbt90502_state *state = NULL;

	deb_info("%s called.\n", __func__);

	/* allocate memory for the internal state */
	state = kzalloc(sizeof(struct jdvbt90502_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	/* setup the state */
	state->i2c = &d->i2c_adap;
	state->config = friio_fe_config;

	/* create dvb_frontend */
	state->frontend.ops = jdvbt90502_ops;
	state->frontend.demodulator_priv = state;

	if (jdvbt90502_init(&state->frontend) < 0)
		goto error;

	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops jdvbt90502_ops = {
	.delsys = { SYS_ISDBT },
	.info = {
		.name			= "Comtech JDVBT90502 ISDB-T",
		.frequency_min		= 473000000, /* UHF 13ch, center */
		.frequency_max		= 767142857, /* UHF 62ch, center */
		.frequency_stepsize	= JDVBT90502_PLL_CLK / JDVBT90502_PLL_DIVIDER,
		.frequency_tolerance	= 0,

		/* NOTE: this driver ignores all parameters but frequency. */
		.caps = FE_CAN_INVERSION_AUTO |
			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
			FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
			FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
			FE_CAN_TRANSMISSION_MODE_AUTO |
			FE_CAN_GUARD_INTERVAL_AUTO |
			FE_CAN_HIERARCHY_AUTO,
	},

	.release = jdvbt90502_release,

	.init = jdvbt90502_init,
	.write = _jdvbt90502_write,

	.set_property = jdvbt90502_set_property,

	.set_frontend = jdvbt90502_set_frontend,

	.read_status = jdvbt90502_read_status,
	.read_signal_strength = jdvbt90502_read_signal_strength,
};
Commit	Line	Data
5eca4823 AT	1	/* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
	2	*
	3	* Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
	4	*
	5	* This module is based off the the gl861 and vp702x modules.
	6	*
	7	* This program is free software; you can redistribute it and/or modify it
	8	* under the terms of the GNU General Public License as published by the Free
	9	* Software Foundation, version 2.
	10	*
	11	* see Documentation/dvb/README.dvb-usb for more information
	12	*/
	13	#include <linux/init.h>
	14	#include <linux/string.h>
	15	#include <linux/slab.h>
	16
	17	#include "friio.h"
	18
	19	struct jdvbt90502_state {
	20	struct i2c_adapter *i2c;
	21	struct dvb_frontend frontend;
	22	struct jdvbt90502_config config;
	23	};
	24
	25	/* NOTE: TC90502 has 16bit register-address? */
	26	/* register 0x0100 is used for reading PLL status, so reg is u16 here */
	27	static int jdvbt90502_reg_read(struct jdvbt90502_state *state,
	28	const u16 reg, u8 *buf, const size_t count)
	29	{
	30	int ret;
	31	u8 wbuf[3];
	32	struct i2c_msg msg[2];
	33
	34	wbuf[0] = reg & 0xFF;
	35	wbuf[1] = 0;
	36	wbuf[2] = reg >> 8;
	37
	38	msg[0].addr = state->config.demod_address;
	39	msg[0].flags = 0;
	40	msg[0].buf = wbuf;
	41	msg[0].len = sizeof(wbuf);
	42
	43	msg[1].addr = msg[0].addr;
	44	msg[1].flags = I2C_M_RD;
	45	msg[1].buf = buf;
	46	msg[1].len = count;
	47
	48	ret = i2c_transfer(state->i2c, msg, 2);
	49	if (ret != 2) {
	50	deb_fe(" reg read failed.\n");
	51	return -EREMOTEIO;
	52	}
	53	return 0;
	54	}
	55
	56	/* currently 16bit register-address is not used, so reg is u8 here */
	57	static int jdvbt90502_single_reg_write(struct jdvbt90502_state *state,
	58	const u8 reg, const u8 val)
	59	{
	60	struct i2c_msg msg;
	61	u8 wbuf[2];
	62
	63	wbuf[0] = reg;
	64	wbuf[1] = val;
65
66	msg.addr = state->config.demod_address;
67	msg.flags = 0;
68	msg.buf = wbuf;
69	msg.len = sizeof(wbuf);
70
71	if (i2c_transfer(state->i2c, &msg, 1) != 1) {
72	deb_fe(" reg write failed.");
73	return -EREMOTEIO;
74	}
75	return 0;
76	}
77
2e4e98e7	78	static int _jdvbt90502_write(struct dvb_frontend *fe, const u8 buf[], int len)
5eca4823 AT	79	{
	80	struct jdvbt90502_state *state = fe->demodulator_priv;
	81	int err, i;
	82	for (i = 0; i < len - 1; i++) {
	83	err = jdvbt90502_single_reg_write(state,
	84	buf[0] + i, buf[i + 1]);
	85	if (err)
	86	return err;
	87	}
	88
	89	return 0;
	90	}
	91
	92	/* read pll status byte via the demodulator's I2C register */
	93	/* note: Win box reads it by 8B block at the I2C addr 0x30 from reg:0x80 */
	94	static int jdvbt90502_pll_read(struct jdvbt90502_state state, u8 result)
	95	{
	96	int ret;
	97
	98	/* +1 for reading */
	99	u8 pll_addr_byte = (state->config.pll_address << 1) + 1;
	100
	101	*result = 0;
	102
	103	ret = jdvbt90502_single_reg_write(state, JDVBT90502_2ND_I2C_REG,
	104	pll_addr_byte);
	105	if (ret)
	106	goto error;
	107
	108	ret = jdvbt90502_reg_read(state, 0x0100, result, 1);
	109	if (ret)
	110	goto error;
	111
	112	deb_fe("PLL read val:%02x\n", *result);
	113	return 0;
	114
	115	error:
	116	deb_fe("%s:ret == %d\n", __func__, ret);
	117	return -EREMOTEIO;
	118	}
	119
	120
	121	/* set pll frequency via the demodulator's I2C register */
	122	static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq)
	123	{
	124	int ret;
	125	int retry;
	126	u8 res1;
	127	u8 res2[9];
	128
	129	u8 pll_freq_cmd[PLL_CMD_LEN];
	130	u8 pll_agc_cmd[PLL_CMD_LEN];
	131	struct i2c_msg msg[2];
	132	u32 f;
	133
	134	deb_fe("%s: freq=%d, step=%d\n", __func__, freq,
	135	state->frontend.ops.info.frequency_stepsize);
	136	/* freq -> oscilator frequency conversion. */
0e2f0d34	137	/* freq: 473,000,000 + n6,000,000 [+ 142857 (center freq. shift)] /
5eca4823	138	f = freq / state->frontend.ops.info.frequency_stepsize;
0e2f0d34 AT	139	/* add 399[1/7 MHZ] = 57MHz for the IF */
	140	f += 399;
	141	/* add center frequency shift if necessary */
	142	if (f % 7 == 0)
	143	f++;
5eca4823 AT	144	pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */
	145	pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1;
	146	pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F;
	147	pll_freq_cmd[DIVIDER_BYTE2] = f & 0xFF;
	148	pll_freq_cmd[CONTROL_BYTE] = 0xB2; /* ref.divider:28, 4MHz/28=1/7MHz */
	149	pll_freq_cmd[BANDSWITCH_BYTE] = 0x08; /* UHF band */
	150
	151	msg[0].addr = state->config.demod_address;
	152	msg[0].flags = 0;
	153	msg[0].buf = pll_freq_cmd;
	154	msg[0].len = sizeof(pll_freq_cmd);
	155
	156	ret = i2c_transfer(state->i2c, &msg[0], 1);
	157	if (ret != 1)
	158	goto error;
	159
	160	udelay(50);
	161
	162	pll_agc_cmd[DEMOD_REDIRECT_REG] = pll_freq_cmd[DEMOD_REDIRECT_REG];
	163	pll_agc_cmd[ADDRESS_BYTE] = pll_freq_cmd[ADDRESS_BYTE];
	164	pll_agc_cmd[DIVIDER_BYTE1] = pll_freq_cmd[DIVIDER_BYTE1];
	165	pll_agc_cmd[DIVIDER_BYTE2] = pll_freq_cmd[DIVIDER_BYTE2];
	166	pll_agc_cmd[CONTROL_BYTE] = 0x9A; /* AGC_CTRL instead of BANDSWITCH */
	167	pll_agc_cmd[AGC_CTRL_BYTE] = 0x50;
	168	/* AGC Time Constant 2s, AGC take-over point:103dBuV(lowest) */
	169
	170	msg[1].addr = msg[0].addr;
	171	msg[1].flags = 0;
	172	msg[1].buf = pll_agc_cmd;
	173	msg[1].len = sizeof(pll_agc_cmd);
	174
	175	ret = i2c_transfer(state->i2c, &msg[1], 1);
	176	if (ret != 1)
	177	goto error;
	178
	179	/* I don't know what these cmds are for, */
	180	/* but the USB log on a windows box contains them */
	181	ret = jdvbt90502_single_reg_write(state, 0x01, 0x40);
	182	ret \|= jdvbt90502_single_reg_write(state, 0x01, 0x00);
	183	if (ret)
	184	goto error;
	185	udelay(100);
	186
	187	/* wait for the demod to be ready? */
	188	#define RETRY_COUNT 5
	189	for (retry = 0; retry < RETRY_COUNT; retry++) {
	190	ret = jdvbt90502_reg_read(state, 0x0096, &res1, 1);
	191	if (ret)
	192	goto error;
	193	/* if (res1 != 0x00) goto error; */
	194	ret = jdvbt90502_reg_read(state, 0x00B0, res2, sizeof(res2));
	195	if (ret)
	196	goto error;
	197	if (res2[0] >= 0xA7)
	198	break;
	199	msleep(100);
	200	}
	201	if (retry >= RETRY_COUNT) {
	202	deb_fe("%s: FE does not get ready after freq setting.\n",
	203	__func__);
	204	return -EREMOTEIO;
	205	}
	206
	207	return 0;
208	error:
209	deb_fe("%s:ret == %d\n", __func__, ret);
210	return -EREMOTEIO;
211	}
212
0df289a2 MCC	213	static int jdvbt90502_read_status(struct dvb_frontend *fe,
0df289a2 MCC	214	enum fe_status *state)
5eca4823 AT	215	{
	216	u8 result;
	217	int ret;
	218
	219	*state = FE_HAS_SIGNAL;
	220
	221	ret = jdvbt90502_pll_read(fe->demodulator_priv, &result);
	222	if (ret) {
	223	deb_fe("%s:ret == %d\n", __func__, ret);
	224	return -EREMOTEIO;
	225	}
	226
	227	*state = FE_HAS_SIGNAL
	228	\| FE_HAS_CARRIER
	229	\| FE_HAS_VITERBI
	230	\| FE_HAS_SYNC;
	231
	232	if (result & PLL_STATUS_LOCKED)
	233	*state \|= FE_HAS_LOCK;
	234
	235	return 0;
	236	}
	237
5eca4823 AT	238	static int jdvbt90502_read_signal_strength(struct dvb_frontend *fe,
	239	u16 *strength)
	240	{
	241	int ret;
	242	u8 rbuf[37];
	243
	244	*strength = 0;
	245
	246	/* status register (incl. signal strength) : 0x89 */
	247	/* TODO: read just the necessary registers [0x8B..0x8D]? */
	248	ret = jdvbt90502_reg_read(fe->demodulator_priv, 0x0089,
	249	rbuf, sizeof(rbuf));
	250
	251	if (ret) {
	252	deb_fe("%s:ret == %d\n", __func__, ret);
	253	return -EREMOTEIO;
	254	}
	255
	256	/* signal_strength: rbuf[2-4] (24bit BE), use lower 16bit for now. */
	257	*strength = (rbuf[3] << 8) + rbuf[4];
	258	if (rbuf[2])
	259	*strength = 0xffff;
	260
	261	return 0;
	262	}
	263
5eca4823	264
ad12f07b AT	265	/* filter out un-supported properties to notify users */
	266	static int jdvbt90502_set_property(struct dvb_frontend *fe,
	267	struct dtv_property *tvp)
	268	{
	269	int r = 0;
	270
	271	switch (tvp->cmd) {
	272	case DTV_DELIVERY_SYSTEM:
	273	if (tvp->u.data != SYS_ISDBT)
	274	r = -EINVAL;
	275	break;
	276	case DTV_CLEAR:
	277	case DTV_TUNE:
	278	case DTV_FREQUENCY:
	279	break;
	280	default:
	281	r = -EINVAL;
	282	}
	283	return r;
	284	}
	285
955c41c0	286	static int jdvbt90502_set_frontend(struct dvb_frontend *fe)
5eca4823	287	{
955c41c0 MCC	288	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
955c41c0 MCC	289
5eca4823	290	/**
88393161	291	* NOTE: ignore all the parameters except frequency.
5eca4823 AT	292	* others should be fixed to the proper value for ISDB-T,
	293	* but don't check here.
	294	*/
	295
	296	struct jdvbt90502_state *state = fe->demodulator_priv;
	297	int ret;
	298
	299	deb_fe("%s: Freq:%d\n", __func__, p->frequency);
	300
6f1bd426 MCC	301	/* This driver only works on auto mode */
	302	p->inversion = INVERSION_AUTO;
	303	p->bandwidth_hz = 6000000;
	304	p->code_rate_HP = FEC_AUTO;
	305	p->code_rate_LP = FEC_AUTO;
	306	p->modulation = QAM_64;
	307	p->transmission_mode = TRANSMISSION_MODE_AUTO;
	308	p->guard_interval = GUARD_INTERVAL_AUTO;
	309	p->hierarchy = HIERARCHY_AUTO;
	310	p->delivery_system = SYS_ISDBT;
ad12f07b	311
5eca4823 AT	312	ret = jdvbt90502_pll_set_freq(state, p->frequency);
	313	if (ret) {
	314	deb_fe("%s:ret == %d\n", __func__, ret);
	315	return -EREMOTEIO;
	316	}
	317
	318	return 0;
	319	}
	320
5eca4823 AT	321
	322	/**
	323	* (reg, val) commad list to initialize this module.
	324	* captured on a Windows box.
	325	*/
	326	static u8 init_code[][2] = {
	327	{0x01, 0x40},
	328	{0x04, 0x38},
	329	{0x05, 0x40},
	330	{0x07, 0x40},
	331	{0x0F, 0x4F},
	332	{0x11, 0x21},
	333	{0x12, 0x0B},
	334	{0x13, 0x2F},
	335	{0x14, 0x31},
	336	{0x16, 0x02},
	337	{0x21, 0xC4},
	338	{0x22, 0x20},
	339	{0x2C, 0x79},
	340	{0x2D, 0x34},
	341	{0x2F, 0x00},
	342	{0x30, 0x28},
	343	{0x31, 0x31},
	344	{0x32, 0xDF},
	345	{0x38, 0x01},
	346	{0x39, 0x78},
	347	{0x3B, 0x33},
	348	{0x3C, 0x33},
	349	{0x48, 0x90},
	350	{0x51, 0x68},
	351	{0x5E, 0x38},
	352	{0x71, 0x00},
	353	{0x72, 0x08},
	354	{0x77, 0x00},
	355	{0xC0, 0x21},
	356	{0xC1, 0x10},
	357	{0xE4, 0x1A},
	358	{0xEA, 0x1F},
	359	{0x77, 0x00},
	360	{0x71, 0x00},
	361	{0x71, 0x00},
	362	{0x76, 0x0C},
	363	};
	364
7b2d3983	365	static const int init_code_len = sizeof(init_code) / sizeof(u8[2]);
5eca4823 AT	366
	367	static int jdvbt90502_init(struct dvb_frontend *fe)
	368	{
	369	int i = -1;
	370	int ret;
	371	struct i2c_msg msg;
	372
	373	struct jdvbt90502_state *state = fe->demodulator_priv;
	374
	375	deb_fe("%s called.\n", __func__);
	376
	377	msg.addr = state->config.demod_address;
	378	msg.flags = 0;
	379	msg.len = 2;
	380	for (i = 0; i < init_code_len; i++) {
	381	msg.buf = init_code[i];
	382	ret = i2c_transfer(state->i2c, &msg, 1);
	383	if (ret != 1)
	384	goto error;
	385	}
ad12f07b	386	fe->dtv_property_cache.delivery_system = SYS_ISDBT;
5eca4823 AT	387	msleep(100);
	388
	389	return 0;
	390
	391	error:
	392	deb_fe("%s: init_code[%d] failed. ret==%d\n", __func__, i, ret);
	393	return -EREMOTEIO;
	394	}
	395
	396
	397	static void jdvbt90502_release(struct dvb_frontend *fe)
	398	{
	399	struct jdvbt90502_state *state = fe->demodulator_priv;
	400	kfree(state);
	401	}
	402
	403
	404	static struct dvb_frontend_ops jdvbt90502_ops;
	405
	406	struct dvb_frontend jdvbt90502_attach(struct dvb_usb_device d)
	407	{
	408	struct jdvbt90502_state *state = NULL;
	409
	410	deb_info("%s called.\n", __func__);
	411
	412	/* allocate memory for the internal state */
	413	state = kzalloc(sizeof(struct jdvbt90502_state), GFP_KERNEL);
	414	if (state == NULL)
	415	goto error;
	416
	417	/* setup the state */
	418	state->i2c = &d->i2c_adap;
d3a95091	419	state->config = friio_fe_config;
5eca4823 AT	420
5eca4823 AT	421	/* create dvb_frontend */
d3a95091	422	state->frontend.ops = jdvbt90502_ops;
5eca4823 AT	423	state->frontend.demodulator_priv = state;
	424
	425	if (jdvbt90502_init(&state->frontend) < 0)
	426	goto error;
	427
	428	return &state->frontend;
	429
	430	error:
	431	kfree(state);
	432	return NULL;
	433	}
	434
	435	static struct dvb_frontend_ops jdvbt90502_ops = {
955c41c0	436	.delsys = { SYS_ISDBT },
5eca4823 AT	437	.info = {
5eca4823 AT	438	.name = "Comtech JDVBT90502 ISDB-T",
5eca4823 AT	439	.frequency_min = 473000000, /* UHF 13ch, center */
5eca4823 AT	440	.frequency_max = 767142857, /* UHF 62ch, center */
955c41c0	441	.frequency_stepsize = JDVBT90502_PLL_CLK / JDVBT90502_PLL_DIVIDER,
5eca4823 AT	442	.frequency_tolerance = 0,
	443
	444	/* NOTE: this driver ignores all parameters but frequency. */
	445	.caps = FE_CAN_INVERSION_AUTO \|
	446	FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	447	FE_CAN_FEC_4_5 \| FE_CAN_FEC_5_6 \| FE_CAN_FEC_6_7 \|
	448	FE_CAN_FEC_7_8 \| FE_CAN_FEC_8_9 \| FE_CAN_FEC_AUTO \|
	449	FE_CAN_QAM_16 \| FE_CAN_QAM_64 \| FE_CAN_QAM_AUTO \|
	450	FE_CAN_TRANSMISSION_MODE_AUTO \|
	451	FE_CAN_GUARD_INTERVAL_AUTO \|
	452	FE_CAN_HIERARCHY_AUTO,
	453	},
	454
	455	.release = jdvbt90502_release,
	456
	457	.init = jdvbt90502_init,
5eca4823 AT	458	.write = _jdvbt90502_write,
5eca4823 AT	459
ad12f07b AT	460	.set_property = jdvbt90502_set_property,
ad12f07b AT	461
955c41c0	462	.set_frontend = jdvbt90502_set_frontend,
5eca4823 AT	463
5eca4823 AT	464	.read_status = jdvbt90502_read_status,
5eca4823	465	.read_signal_strength = jdvbt90502_read_signal_strength,
5eca4823	466	};