drivers/media/dvb/frontends/mb86a20s.c - kernel/msm-4.9 - Gitiles

 /*
  *   Fujitu mb86a20s ISDB-T/ISDB-Tsb Module driver
  *
  *   Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com>
  *   Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
  *
  *   FIXME: Need to port to DVB v5.2 API
  *
  *   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.
  *
  *   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.
  */

 #include <linux/kernel.h>
 #include <asm/div64.h>

 #include "dvb_frontend.h"
 #include "mb86a20s.h"

 static int debug = 1;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");

 #define rc(args...)  do {						\
 	printk(KERN_ERR  "mb86a20s: " args);				\
 } while (0)

 #define dprintk(args...)						\
 	do {								\
 		if (debug) {						\
 			printk(KERN_DEBUG "mb86a20s: %s: ", __func__);	\
 			printk(args);					\
 		}							\
 	} while (0)

 struct mb86a20s_state {
 	struct i2c_adapter *i2c;
 	const struct mb86a20s_config *config;

 	struct dvb_frontend frontend;

 	bool need_init;
 };

 struct regdata {
 	u8 reg;
 	u8 data;
 };

 /*
  * Initialization sequence: Use whatevere default values that PV SBTVD
  * does on its initialisation, obtained via USB snoop
  */
 static struct regdata mb86a20s_init[] = {
 	{ 0x70, 0x0f },
 	{ 0x70, 0xff },
 	{ 0x08, 0x01 },
 	{ 0x09, 0x3e },
 	{ 0x50, 0xd1 },
 	{ 0x51, 0x22 },
 	{ 0x39, 0x01 },
 	{ 0x71, 0x00 },
 	{ 0x28, 0x2a },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0xff },
 	{ 0x2b, 0x80 },
 	{ 0x28, 0x20 },
 	{ 0x29, 0x33 },
 	{ 0x2a, 0xdf },
 	{ 0x2b, 0xa9 },
 	{ 0x3b, 0x21 },
 	{ 0x3c, 0x3a },
 	{ 0x01, 0x0d },
 	{ 0x04, 0x08 },
 	{ 0x05, 0x05 },
 	{ 0x04, 0x0e },
 	{ 0x05, 0x00 },
 	{ 0x04, 0x0f },
 	{ 0x05, 0x14 },
 	{ 0x04, 0x0b },
 	{ 0x05, 0x8c },
 	{ 0x04, 0x00 },
 	{ 0x05, 0x00 },
 	{ 0x04, 0x01 },
 	{ 0x05, 0x07 },
 	{ 0x04, 0x02 },
 	{ 0x05, 0x0f },
 	{ 0x04, 0x03 },
 	{ 0x05, 0xa0 },
 	{ 0x04, 0x09 },
 	{ 0x05, 0x00 },
 	{ 0x04, 0x0a },
 	{ 0x05, 0xff },
 	{ 0x04, 0x27 },
 	{ 0x05, 0x64 },
 	{ 0x04, 0x28 },
 	{ 0x05, 0x00 },
 	{ 0x04, 0x1e },
 	{ 0x05, 0xff },
 	{ 0x04, 0x29 },
 	{ 0x05, 0x0a },
 	{ 0x04, 0x32 },
 	{ 0x05, 0x0a },
 	{ 0x04, 0x14 },
 	{ 0x05, 0x02 },
 	{ 0x04, 0x04 },
 	{ 0x05, 0x00 },
 	{ 0x04, 0x05 },
 	{ 0x05, 0x22 },
 	{ 0x04, 0x06 },
 	{ 0x05, 0x0e },
 	{ 0x04, 0x07 },
 	{ 0x05, 0xd8 },
 	{ 0x04, 0x12 },
 	{ 0x05, 0x00 },
 	{ 0x04, 0x13 },
 	{ 0x05, 0xff },
 	{ 0x52, 0x01 },
 	{ 0x50, 0xa7 },
 	{ 0x51, 0x00 },
 	{ 0x50, 0xa8 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xa9 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xaa },
 	{ 0x51, 0x00 },
 	{ 0x50, 0xab },
 	{ 0x51, 0xff },
 	{ 0x50, 0xac },
 	{ 0x51, 0xff },
 	{ 0x50, 0xad },
 	{ 0x51, 0x00 },
 	{ 0x50, 0xae },
 	{ 0x51, 0xff },
 	{ 0x50, 0xaf },
 	{ 0x51, 0xff },
 	{ 0x5e, 0x07 },
 	{ 0x50, 0xdc },
 	{ 0x51, 0x01 },
 	{ 0x50, 0xdd },
 	{ 0x51, 0xf4 },
 	{ 0x50, 0xde },
 	{ 0x51, 0x01 },
 	{ 0x50, 0xdf },
 	{ 0x51, 0xf4 },
 	{ 0x50, 0xe0 },
 	{ 0x51, 0x01 },
 	{ 0x50, 0xe1 },
 	{ 0x51, 0xf4 },
 	{ 0x50, 0xb0 },
 	{ 0x51, 0x07 },
 	{ 0x50, 0xb2 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xb3 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xb4 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xb5 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xb6 },
 	{ 0x51, 0xff },
 	{ 0x50, 0xb7 },
 	{ 0x51, 0xff },
 	{ 0x50, 0x50 },
 	{ 0x51, 0x02 },
 	{ 0x50, 0x51 },
 	{ 0x51, 0x04 },
 	{ 0x45, 0x04 },
 	{ 0x48, 0x04 },
 	{ 0x50, 0xd5 },
 	{ 0x51, 0x01 },		/* Serial */
 	{ 0x50, 0xd6 },
 	{ 0x51, 0x1f },
 	{ 0x50, 0xd2 },
 	{ 0x51, 0x03 },
 	{ 0x50, 0xd7 },
 	{ 0x51, 0x3f },
 	{ 0x1c, 0x01 },
 	{ 0x28, 0x06 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x03 },
 	{ 0x28, 0x07 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x0d },
 	{ 0x28, 0x08 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x02 },
 	{ 0x28, 0x09 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x01 },
 	{ 0x28, 0x0a },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x21 },
 	{ 0x28, 0x0b },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x29 },
 	{ 0x28, 0x0c },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x16 },
 	{ 0x28, 0x0d },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x31 },
 	{ 0x28, 0x0e },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x0e },
 	{ 0x28, 0x0f },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x4e },
 	{ 0x28, 0x10 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x46 },
 	{ 0x28, 0x11 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x0f },
 	{ 0x28, 0x12 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x56 },
 	{ 0x28, 0x13 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x35 },
 	{ 0x28, 0x14 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x01 },
 	{ 0x2b, 0xbe },
 	{ 0x28, 0x15 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x01 },
 	{ 0x2b, 0x84 },
 	{ 0x28, 0x16 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x03 },
 	{ 0x2b, 0xee },
 	{ 0x28, 0x17 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x98 },
 	{ 0x28, 0x18 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x00 },
 	{ 0x2b, 0x9f },
 	{ 0x28, 0x19 },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x07 },
 	{ 0x2b, 0xb2 },
 	{ 0x28, 0x1a },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x06 },
 	{ 0x2b, 0xc2 },
 	{ 0x28, 0x1b },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x07 },
 	{ 0x2b, 0x4a },
 	{ 0x28, 0x1c },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x01 },
 	{ 0x2b, 0xbc },
 	{ 0x28, 0x1d },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x04 },
 	{ 0x2b, 0xba },
 	{ 0x28, 0x1e },
 	{ 0x29, 0x00 },
 	{ 0x2a, 0x06 },
 	{ 0x2b, 0x14 },
 	{ 0x50, 0x1e },
 	{ 0x51, 0x5d },
 	{ 0x50, 0x22 },
 	{ 0x51, 0x00 },
 	{ 0x50, 0x23 },
 	{ 0x51, 0xc8 },
 	{ 0x50, 0x24 },
 	{ 0x51, 0x00 },
 	{ 0x50, 0x25 },
 	{ 0x51, 0xf0 },
 	{ 0x50, 0x26 },
 	{ 0x51, 0x00 },
 	{ 0x50, 0x27 },
 	{ 0x51, 0xc3 },
 	{ 0x50, 0x39 },
 	{ 0x51, 0x02 },
 	{ 0x50, 0xd5 },
 	{ 0x51, 0x01 },
 	{ 0xd0, 0x00 },
 };

 static struct regdata mb86a20s_reset_reception[] = {
 	{ 0x70, 0xf0 },
 	{ 0x70, 0xff },
 	{ 0x08, 0x01 },
 	{ 0x08, 0x00 },
 };

 static int mb86a20s_i2c_writereg(struct mb86a20s_state *state,
 			     u8 i2c_addr, int reg, int data)
 {
 	u8 buf[] = { reg, data };
 	struct i2c_msg msg = {
 		.addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
 	};
 	int rc;

 	rc = i2c_transfer(state->i2c, &msg, 1);
 	if (rc != 1) {
 		printk("%s: writereg error (rc == %i, reg == 0x%02x,"
 			 " data == 0x%02x)\n", __func__, rc, reg, data);
 		return rc;
 	}

 	return 0;
 }

 static int mb86a20s_i2c_writeregdata(struct mb86a20s_state *state,
 				     u8 i2c_addr, struct regdata *rd, int size)
 {
 	int i, rc;

 	for (i = 0; i < size; i++) {
 		rc = mb86a20s_i2c_writereg(state, i2c_addr, rd[i].reg,
 					   rd[i].data);
 		if (rc < 0)
 			return rc;
 	}
 	return 0;
 }

 static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
 				u8 i2c_addr, u8 reg)
 {
 	u8 val;
 	int rc;
 	struct i2c_msg msg[] = {
 		{ .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
 		{ .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
 	};

 	rc = i2c_transfer(state->i2c, msg, 2);

 	if (rc != 2) {
 		rc("%s: reg=0x%x (error=%d)\n", __func__, reg, rc);
 		return rc;
 	}

 	return val;
 }

 #define mb86a20s_readreg(state, reg) \
 	mb86a20s_i2c_readreg(state, state->config->demod_address, reg)
 #define mb86a20s_writereg(state, reg, val) \
 	mb86a20s_i2c_writereg(state, state->config->demod_address, reg, val)
 #define mb86a20s_writeregdata(state, regdata) \
 	mb86a20s_i2c_writeregdata(state, state->config->demod_address, \
 	regdata, ARRAY_SIZE(regdata))

 static int mb86a20s_initfe(struct dvb_frontend *fe)
 {
 	struct mb86a20s_state *state = fe->demodulator_priv;
 	int rc;
 	u8  regD5 = 1;

 	dprintk("\n");

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);

 	/* Initialize the frontend */
 	rc = mb86a20s_writeregdata(state, mb86a20s_init);
 	if (rc < 0)
 		goto err;

 	if (!state->config->is_serial) {
 		regD5 &= ~1;

 		rc = mb86a20s_writereg(state, 0x50, 0xd5);
 		if (rc < 0)
 			goto err;
 		rc = mb86a20s_writereg(state, 0x51, regD5);
 		if (rc < 0)
 			goto err;
 	}

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);

 err:
 	if (rc < 0) {
 		state->need_init = true;
 		printk(KERN_INFO "mb86a20s: Init failed. Will try again later\n");
 	} else {
 		state->need_init = false;
 		dprintk("Initialization succeeded.\n");
 	}
 	return rc;
 }

 static int mb86a20s_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 {
 	struct mb86a20s_state *state = fe->demodulator_priv;
 	unsigned rf_max, rf_min, rf;
 	u8	 val;

 	dprintk("\n");

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);

 	/* Does a binary search to get RF strength */
 	rf_max = 0xfff;
 	rf_min = 0;
 	do {
 		rf = (rf_max + rf_min) / 2;
 		mb86a20s_writereg(state, 0x04, 0x1f);
 		mb86a20s_writereg(state, 0x05, rf >> 8);
 		mb86a20s_writereg(state, 0x04, 0x20);
 		mb86a20s_writereg(state, 0x04, rf);

 		val = mb86a20s_readreg(state, 0x02);
 		if (val & 0x08)
 			rf_min = (rf_max + rf_min) / 2;
 		else
 			rf_max = (rf_max + rf_min) / 2;
 		if (rf_max - rf_min < 4) {
 			*strength = (((rf_max + rf_min) / 2) * 65535) / 4095;
 			break;
 		}
 	} while (1);

 	dprintk("signal strength = %d\n", *strength);

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);

 	return 0;
 }

 static int mb86a20s_read_status(struct dvb_frontend *fe, fe_status_t *status)
 {
 	struct mb86a20s_state *state = fe->demodulator_priv;
 	u8 val;

 	dprintk("\n");
 	*status = 0;

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);
 	val = mb86a20s_readreg(state, 0x0a) & 0xf;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);

 	if (val >= 2)
 		*status |= FE_HAS_SIGNAL;

 	if (val >= 4)
 		*status |= FE_HAS_CARRIER;

 	if (val >= 5)
 		*status |= FE_HAS_VITERBI;

 	if (val >= 7)
 		*status |= FE_HAS_SYNC;

 	if (val >= 8)				/* Maybe 9? */
 		*status |= FE_HAS_LOCK;

 	dprintk("val = %d, status = 0x%02x\n", val, *status);

 	return 0;
 }

 static int mb86a20s_set_frontend(struct dvb_frontend *fe,
 	struct dvb_frontend_parameters *p)
 {
 	struct mb86a20s_state *state = fe->demodulator_priv;
 	int rc;

 	dprintk("\n");

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	dprintk("Calling tuner set parameters\n");
 	fe->ops.tuner_ops.set_params(fe, p);

 	/*
 	 * Make it more reliable: if, for some reason, the initial
 	 * device initialization doesn't happen, initialize it when
 	 * a SBTVD parameters are adjusted.
 	 *
 	 * Unfortunately, due to a hard to track bug at tda829x/tda18271,
 	 * the agc callback logic is not called during DVB attach time,
 	 * causing mb86a20s to not be initialized with Kworld SBTVD.
 	 * So, this hack is needed, in order to make Kworld SBTVD to work.
 	 */
 	if (state->need_init)
 		mb86a20s_initfe(fe);

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);
 	rc = mb86a20s_writeregdata(state, mb86a20s_reset_reception);
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);

 	return rc;
 }

 static int mb86a20s_get_frontend(struct dvb_frontend *fe,
 	struct dvb_frontend_parameters *p)
 {

 	/* FIXME: For now, it does nothing */

 	fe->dtv_property_cache.bandwidth_hz = 6000000;
 	fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
 	fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
 	fe->dtv_property_cache.isdbt_partial_reception = 0;

 	return 0;
 }

 static int mb86a20s_tune(struct dvb_frontend *fe,
 			struct dvb_frontend_parameters *params,
 			unsigned int mode_flags,
 			unsigned int *delay,
 			fe_status_t *status)
 {
 	int rc = 0;

 	dprintk("\n");

 	if (params != NULL)
 		rc = mb86a20s_set_frontend(fe, params);

 	if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
 		mb86a20s_read_status(fe, status);

 	return rc;
 }

 static void mb86a20s_release(struct dvb_frontend *fe)
 {
 	struct mb86a20s_state *state = fe->demodulator_priv;

 	dprintk("\n");

 	kfree(state);
 }

 static struct dvb_frontend_ops mb86a20s_ops;

 struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
 				    struct i2c_adapter *i2c)
 {
 	u8	rev;

 	/* allocate memory for the internal state */
 	struct mb86a20s_state *state =
 		kzalloc(sizeof(struct mb86a20s_state), GFP_KERNEL);

 	dprintk("\n");
 	if (state == NULL) {
 		rc("Unable to kzalloc\n");
 		goto error;
 	}

 	/* setup the state */
 	state->config = config;
 	state->i2c = i2c;

 	/* create dvb_frontend */
 	memcpy(&state->frontend.ops, &mb86a20s_ops,
 		sizeof(struct dvb_frontend_ops));
 	state->frontend.demodulator_priv = state;

 	/* Check if it is a mb86a20s frontend */
 	rev = mb86a20s_readreg(state, 0);

 	if (rev == 0x13) {
 		printk(KERN_INFO "Detected a Fujitsu mb86a20s frontend\n");
 	} else {
 		printk(KERN_ERR "Frontend revision %d is unknown - aborting.\n",
 		       rev);
 		goto error;
 	}

 	return &state->frontend;

 error:
 	kfree(state);
 	return NULL;
 }
 EXPORT_SYMBOL(mb86a20s_attach);

 static struct dvb_frontend_ops mb86a20s_ops = {
 	/* Use dib8000 values per default */
 	.info = {
 		.name = "Fujitsu mb86A20s",
 		.type = FE_OFDM,
 		.caps = FE_CAN_INVERSION_AUTO | FE_CAN_RECOVER |
 			FE_CAN_FEC_1_2  | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 			FE_CAN_FEC_5_6  | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 			FE_CAN_QPSK     | FE_CAN_QAM_16  | FE_CAN_QAM_64 |
 			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_QAM_AUTO |
 			FE_CAN_GUARD_INTERVAL_AUTO    | FE_CAN_HIERARCHY_AUTO,
 		/* Actually, those values depend on the used tuner */
 		.frequency_min = 45000000,
 		.frequency_max = 864000000,
 		.frequency_stepsize = 62500,
 	},

 	.release = mb86a20s_release,

 	.init = mb86a20s_initfe,
 	.set_frontend = mb86a20s_set_frontend,
 	.get_frontend = mb86a20s_get_frontend,
 	.read_status = mb86a20s_read_status,
 	.read_signal_strength = mb86a20s_read_signal_strength,
 	.tune = mb86a20s_tune,
 };

 MODULE_DESCRIPTION("DVB Frontend module for Fujitsu mb86A20s hardware");
 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
 MODULE_LICENSE("GPL");
	/*
	* Fujitu mb86a20s ISDB-T/ISDB-Tsb Module driver
	*
	* Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com>
	* Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com>
	*
	* FIXME: Need to port to DVB v5.2 API
	*
	* 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.
	*
	* 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.
	*/

	#include <linux/kernel.h>
	#include <asm/div64.h>

	#include "dvb_frontend.h"
	#include "mb86a20s.h"

	static int debug = 1;
	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");

	#define rc(args...) do { \
	printk(KERN_ERR "mb86a20s: " args); \
	} while (0)

	#define dprintk(args...) \
	do { \
	if (debug) { \
	printk(KERN_DEBUG "mb86a20s: %s: ", __func__); \
	printk(args); \
	} \
	} while (0)

	struct mb86a20s_state {
	struct i2c_adapter *i2c;
	const struct mb86a20s_config *config;

	struct dvb_frontend frontend;

	bool need_init;
	};

	struct regdata {
	u8 reg;
	u8 data;
	};

	/*
	* Initialization sequence: Use whatevere default values that PV SBTVD
	* does on its initialisation, obtained via USB snoop
	*/
	static struct regdata mb86a20s_init[] = {
	{ 0x70, 0x0f },
	{ 0x70, 0xff },
	{ 0x08, 0x01 },
	{ 0x09, 0x3e },
	{ 0x50, 0xd1 },
	{ 0x51, 0x22 },
	{ 0x39, 0x01 },
	{ 0x71, 0x00 },
	{ 0x28, 0x2a },
	{ 0x29, 0x00 },
	{ 0x2a, 0xff },
	{ 0x2b, 0x80 },
	{ 0x28, 0x20 },
	{ 0x29, 0x33 },
	{ 0x2a, 0xdf },
	{ 0x2b, 0xa9 },
	{ 0x3b, 0x21 },
	{ 0x3c, 0x3a },
	{ 0x01, 0x0d },
	{ 0x04, 0x08 },
	{ 0x05, 0x05 },
	{ 0x04, 0x0e },
	{ 0x05, 0x00 },
	{ 0x04, 0x0f },
	{ 0x05, 0x14 },
	{ 0x04, 0x0b },
	{ 0x05, 0x8c },
	{ 0x04, 0x00 },
	{ 0x05, 0x00 },
	{ 0x04, 0x01 },
	{ 0x05, 0x07 },
	{ 0x04, 0x02 },
	{ 0x05, 0x0f },
	{ 0x04, 0x03 },
	{ 0x05, 0xa0 },
	{ 0x04, 0x09 },
	{ 0x05, 0x00 },
	{ 0x04, 0x0a },
	{ 0x05, 0xff },
	{ 0x04, 0x27 },
	{ 0x05, 0x64 },
	{ 0x04, 0x28 },
	{ 0x05, 0x00 },
	{ 0x04, 0x1e },
	{ 0x05, 0xff },
	{ 0x04, 0x29 },
	{ 0x05, 0x0a },
	{ 0x04, 0x32 },
	{ 0x05, 0x0a },
	{ 0x04, 0x14 },
	{ 0x05, 0x02 },
	{ 0x04, 0x04 },
	{ 0x05, 0x00 },
	{ 0x04, 0x05 },
	{ 0x05, 0x22 },
	{ 0x04, 0x06 },
	{ 0x05, 0x0e },
	{ 0x04, 0x07 },
	{ 0x05, 0xd8 },
	{ 0x04, 0x12 },
	{ 0x05, 0x00 },
	{ 0x04, 0x13 },
	{ 0x05, 0xff },
	{ 0x52, 0x01 },
	{ 0x50, 0xa7 },
	{ 0x51, 0x00 },
	{ 0x50, 0xa8 },
	{ 0x51, 0xff },
	{ 0x50, 0xa9 },
	{ 0x51, 0xff },
	{ 0x50, 0xaa },
	{ 0x51, 0x00 },
	{ 0x50, 0xab },
	{ 0x51, 0xff },
	{ 0x50, 0xac },
	{ 0x51, 0xff },
	{ 0x50, 0xad },
	{ 0x51, 0x00 },
	{ 0x50, 0xae },
	{ 0x51, 0xff },
	{ 0x50, 0xaf },
	{ 0x51, 0xff },
	{ 0x5e, 0x07 },
	{ 0x50, 0xdc },
	{ 0x51, 0x01 },
	{ 0x50, 0xdd },
	{ 0x51, 0xf4 },
	{ 0x50, 0xde },
	{ 0x51, 0x01 },
	{ 0x50, 0xdf },
	{ 0x51, 0xf4 },
	{ 0x50, 0xe0 },
	{ 0x51, 0x01 },
	{ 0x50, 0xe1 },
	{ 0x51, 0xf4 },
	{ 0x50, 0xb0 },
	{ 0x51, 0x07 },
	{ 0x50, 0xb2 },
	{ 0x51, 0xff },
	{ 0x50, 0xb3 },
	{ 0x51, 0xff },
	{ 0x50, 0xb4 },
	{ 0x51, 0xff },
	{ 0x50, 0xb5 },
	{ 0x51, 0xff },
	{ 0x50, 0xb6 },
	{ 0x51, 0xff },
	{ 0x50, 0xb7 },
	{ 0x51, 0xff },
	{ 0x50, 0x50 },
	{ 0x51, 0x02 },
	{ 0x50, 0x51 },
	{ 0x51, 0x04 },
	{ 0x45, 0x04 },
	{ 0x48, 0x04 },
	{ 0x50, 0xd5 },
	{ 0x51, 0x01 }, /* Serial */
	{ 0x50, 0xd6 },
	{ 0x51, 0x1f },
	{ 0x50, 0xd2 },
	{ 0x51, 0x03 },
	{ 0x50, 0xd7 },
	{ 0x51, 0x3f },
	{ 0x1c, 0x01 },
	{ 0x28, 0x06 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x03 },
	{ 0x28, 0x07 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x0d },
	{ 0x28, 0x08 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x02 },
	{ 0x28, 0x09 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x01 },
	{ 0x28, 0x0a },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x21 },
	{ 0x28, 0x0b },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x29 },
	{ 0x28, 0x0c },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x16 },
	{ 0x28, 0x0d },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x31 },
	{ 0x28, 0x0e },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x0e },
	{ 0x28, 0x0f },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x4e },
	{ 0x28, 0x10 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x46 },
	{ 0x28, 0x11 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x0f },
	{ 0x28, 0x12 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x56 },
	{ 0x28, 0x13 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x35 },
	{ 0x28, 0x14 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x01 },
	{ 0x2b, 0xbe },
	{ 0x28, 0x15 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x01 },
	{ 0x2b, 0x84 },
	{ 0x28, 0x16 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x03 },
	{ 0x2b, 0xee },
	{ 0x28, 0x17 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x98 },
	{ 0x28, 0x18 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x00 },
	{ 0x2b, 0x9f },
	{ 0x28, 0x19 },
	{ 0x29, 0x00 },
	{ 0x2a, 0x07 },
	{ 0x2b, 0xb2 },
	{ 0x28, 0x1a },
	{ 0x29, 0x00 },
	{ 0x2a, 0x06 },
	{ 0x2b, 0xc2 },
	{ 0x28, 0x1b },
	{ 0x29, 0x00 },
	{ 0x2a, 0x07 },
	{ 0x2b, 0x4a },
	{ 0x28, 0x1c },
	{ 0x29, 0x00 },
	{ 0x2a, 0x01 },
	{ 0x2b, 0xbc },
	{ 0x28, 0x1d },
	{ 0x29, 0x00 },
	{ 0x2a, 0x04 },
	{ 0x2b, 0xba },
	{ 0x28, 0x1e },
	{ 0x29, 0x00 },
	{ 0x2a, 0x06 },
	{ 0x2b, 0x14 },
	{ 0x50, 0x1e },
	{ 0x51, 0x5d },
	{ 0x50, 0x22 },
	{ 0x51, 0x00 },
	{ 0x50, 0x23 },
	{ 0x51, 0xc8 },
	{ 0x50, 0x24 },
	{ 0x51, 0x00 },
	{ 0x50, 0x25 },
	{ 0x51, 0xf0 },
	{ 0x50, 0x26 },
	{ 0x51, 0x00 },
	{ 0x50, 0x27 },
	{ 0x51, 0xc3 },
	{ 0x50, 0x39 },
	{ 0x51, 0x02 },
	{ 0x50, 0xd5 },
	{ 0x51, 0x01 },
	{ 0xd0, 0x00 },
	};

	static struct regdata mb86a20s_reset_reception[] = {
	{ 0x70, 0xf0 },
	{ 0x70, 0xff },
	{ 0x08, 0x01 },
	{ 0x08, 0x00 },
	};

	static int mb86a20s_i2c_writereg(struct mb86a20s_state *state,
	u8 i2c_addr, int reg, int data)
	{
	u8 buf[] = { reg, data };
	struct i2c_msg msg = {
	.addr = i2c_addr, .flags = 0, .buf = buf, .len = 2
	};
	int rc;

	rc = i2c_transfer(state->i2c, &msg, 1);
	if (rc != 1) {
	printk("%s: writereg error (rc == %i, reg == 0x%02x,"
	" data == 0x%02x)\n", __func__, rc, reg, data);
	return rc;
	}

	return 0;
	}

	static int mb86a20s_i2c_writeregdata(struct mb86a20s_state *state,
	u8 i2c_addr, struct regdata *rd, int size)
	{
	int i, rc;

	for (i = 0; i < size; i++) {
	rc = mb86a20s_i2c_writereg(state, i2c_addr, rd[i].reg,
	rd[i].data);
	if (rc < 0)
	return rc;
	}
	return 0;
	}

	static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
	u8 i2c_addr, u8 reg)
	{
	u8 val;
	int rc;
	struct i2c_msg msg[] = {
	{ .addr = i2c_addr, .flags = 0, .buf = &reg, .len = 1 },
	{ .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
	};

	rc = i2c_transfer(state->i2c, msg, 2);

	if (rc != 2) {
	rc("%s: reg=0x%x (error=%d)\n", __func__, reg, rc);
	return rc;
	}

	return val;
	}

	#define mb86a20s_readreg(state, reg) \
	mb86a20s_i2c_readreg(state, state->config->demod_address, reg)
	#define mb86a20s_writereg(state, reg, val) \
	mb86a20s_i2c_writereg(state, state->config->demod_address, reg, val)
	#define mb86a20s_writeregdata(state, regdata) \
	mb86a20s_i2c_writeregdata(state, state->config->demod_address, \
	regdata, ARRAY_SIZE(regdata))

	static int mb86a20s_initfe(struct dvb_frontend *fe)
	{
	struct mb86a20s_state *state = fe->demodulator_priv;
	int rc;
	u8 regD5 = 1;

	dprintk("\n");

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);

	/* Initialize the frontend */
	rc = mb86a20s_writeregdata(state, mb86a20s_init);
	if (rc < 0)
	goto err;

	if (!state->config->is_serial) {
	regD5 &= ~1;

	rc = mb86a20s_writereg(state, 0x50, 0xd5);
	if (rc < 0)
	goto err;
	rc = mb86a20s_writereg(state, 0x51, regD5);
	if (rc < 0)
	goto err;
	}

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);

	err:
	if (rc < 0) {
	state->need_init = true;
	printk(KERN_INFO "mb86a20s: Init failed. Will try again later\n");
	} else {
	state->need_init = false;
	dprintk("Initialization succeeded.\n");
	}
	return rc;
	}

	static int mb86a20s_read_signal_strength(struct dvb_frontend fe, u16 strength)
	{
	struct mb86a20s_state *state = fe->demodulator_priv;
	unsigned rf_max, rf_min, rf;
	u8 val;

	dprintk("\n");

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);

	/* Does a binary search to get RF strength */
	rf_max = 0xfff;
	rf_min = 0;
	do {
	rf = (rf_max + rf_min) / 2;
	mb86a20s_writereg(state, 0x04, 0x1f);
	mb86a20s_writereg(state, 0x05, rf >> 8);
	mb86a20s_writereg(state, 0x04, 0x20);
	mb86a20s_writereg(state, 0x04, rf);

	val = mb86a20s_readreg(state, 0x02);
	if (val & 0x08)
	rf_min = (rf_max + rf_min) / 2;
	else
	rf_max = (rf_max + rf_min) / 2;
	if (rf_max - rf_min < 4) {
	strength = (((rf_max + rf_min) / 2) 65535) / 4095;
	break;
	}
	} while (1);

	dprintk("signal strength = %d\n", *strength);

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);

	return 0;
	}

	static int mb86a20s_read_status(struct dvb_frontend fe, fe_status_t status)
	{
	struct mb86a20s_state *state = fe->demodulator_priv;
	u8 val;

	dprintk("\n");
	*status = 0;

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);
	val = mb86a20s_readreg(state, 0x0a) & 0xf;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);

	if (val >= 2)
	*status \|= FE_HAS_SIGNAL;

	if (val >= 4)
	*status \|= FE_HAS_CARRIER;

	if (val >= 5)
	*status \|= FE_HAS_VITERBI;

	if (val >= 7)
	*status \|= FE_HAS_SYNC;

	if (val >= 8) /* Maybe 9? */
	*status \|= FE_HAS_LOCK;

	dprintk("val = %d, status = 0x%02x\n", val, *status);

	return 0;
	}

	static int mb86a20s_set_frontend(struct dvb_frontend *fe,
	struct dvb_frontend_parameters *p)
	{
	struct mb86a20s_state *state = fe->demodulator_priv;
	int rc;

	dprintk("\n");

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	dprintk("Calling tuner set parameters\n");
	fe->ops.tuner_ops.set_params(fe, p);

	/*
	* Make it more reliable: if, for some reason, the initial
	* device initialization doesn't happen, initialize it when
	* a SBTVD parameters are adjusted.
	*
	* Unfortunately, due to a hard to track bug at tda829x/tda18271,
	* the agc callback logic is not called during DVB attach time,
	* causing mb86a20s to not be initialized with Kworld SBTVD.
	* So, this hack is needed, in order to make Kworld SBTVD to work.
	*/
	if (state->need_init)
	mb86a20s_initfe(fe);

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);
	rc = mb86a20s_writeregdata(state, mb86a20s_reset_reception);
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);

	return rc;
	}

	static int mb86a20s_get_frontend(struct dvb_frontend *fe,
	struct dvb_frontend_parameters *p)
	{

	/* FIXME: For now, it does nothing */

	fe->dtv_property_cache.bandwidth_hz = 6000000;
	fe->dtv_property_cache.transmission_mode = TRANSMISSION_MODE_AUTO;
	fe->dtv_property_cache.guard_interval = GUARD_INTERVAL_AUTO;
	fe->dtv_property_cache.isdbt_partial_reception = 0;

	return 0;
	}

	static int mb86a20s_tune(struct dvb_frontend *fe,
	struct dvb_frontend_parameters *params,
	unsigned int mode_flags,
	unsigned int *delay,
	fe_status_t *status)
	{
	int rc = 0;

	dprintk("\n");

	if (params != NULL)
	rc = mb86a20s_set_frontend(fe, params);

	if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
	mb86a20s_read_status(fe, status);

	return rc;
	}

	static void mb86a20s_release(struct dvb_frontend *fe)
	{
	struct mb86a20s_state *state = fe->demodulator_priv;

	dprintk("\n");

	kfree(state);
	}

	static struct dvb_frontend_ops mb86a20s_ops;

	struct dvb_frontend mb86a20s_attach(const struct mb86a20s_config config,
	struct i2c_adapter *i2c)
	{
	u8 rev;

	/* allocate memory for the internal state */
	struct mb86a20s_state *state =
	kzalloc(sizeof(struct mb86a20s_state), GFP_KERNEL);

	dprintk("\n");
	if (state == NULL) {
	rc("Unable to kzalloc\n");
	goto error;
	}

	/* setup the state */
	state->config = config;
	state->i2c = i2c;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &mb86a20s_ops,
	sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;

	/* Check if it is a mb86a20s frontend */
	rev = mb86a20s_readreg(state, 0);

	if (rev == 0x13) {
	printk(KERN_INFO "Detected a Fujitsu mb86a20s frontend\n");
	} else {
	printk(KERN_ERR "Frontend revision %d is unknown - aborting.\n",
	rev);
	goto error;
	}

	return &state->frontend;

	error:
	kfree(state);
	return NULL;
	}
	EXPORT_SYMBOL(mb86a20s_attach);

	static struct dvb_frontend_ops mb86a20s_ops = {
	/* Use dib8000 values per default */
	.info = {
	.name = "Fujitsu mb86A20s",
	.type = FE_OFDM,
	.caps = FE_CAN_INVERSION_AUTO \| FE_CAN_RECOVER \|
	FE_CAN_FEC_1_2 \| FE_CAN_FEC_2_3 \| FE_CAN_FEC_3_4 \|
	FE_CAN_FEC_5_6 \| FE_CAN_FEC_7_8 \| FE_CAN_FEC_AUTO \|
	FE_CAN_QPSK \| FE_CAN_QAM_16 \| FE_CAN_QAM_64 \|
	FE_CAN_TRANSMISSION_MODE_AUTO \| FE_CAN_QAM_AUTO \|
	FE_CAN_GUARD_INTERVAL_AUTO \| FE_CAN_HIERARCHY_AUTO,
	/* Actually, those values depend on the used tuner */
	.frequency_min = 45000000,
	.frequency_max = 864000000,
	.frequency_stepsize = 62500,
	},

	.release = mb86a20s_release,

	.init = mb86a20s_initfe,
	.set_frontend = mb86a20s_set_frontend,
	.get_frontend = mb86a20s_get_frontend,
	.read_status = mb86a20s_read_status,
	.read_signal_strength = mb86a20s_read_signal_strength,
	.tune = mb86a20s_tune,
	};

	MODULE_DESCRIPTION("DVB Frontend module for Fujitsu mb86A20s hardware");
	MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
	MODULE_LICENSE("GPL");