path: root/drivers/media/dvb/frontends/stv0297.c

/*
    Driver for STV0297 demodulator

    Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net>
    Copyright (C) 2003-2004 Dennis Noermann <dennis.noermann@noernet.de>

    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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/delay.h>

#include "dvb_frontend.h"
#include "stv0297.h"

struct stv0297_state {
	struct i2c_adapter *i2c;
	struct dvb_frontend_ops ops;
	const struct stv0297_config *config;
	struct dvb_frontend frontend;

	unsigned long base_freq;
	u8 pwm;
};

#if 1
#define dprintk(x...) printk(x)
#else
#define dprintk(x...)
#endif

#define STV0297_CLOCK_KHZ   28900

static u8 init_tab[] = {
	0x00, 0x09,
	0x01, 0x69,
	0x03, 0x00,
	0x04, 0x00,
	0x07, 0x00,
	0x08, 0x00,
	0x20, 0x00,
	0x21, 0x40,
	0x22, 0x00,
	0x23, 0x00,
	0x24, 0x40,
	0x25, 0x88,
	0x30, 0xff,
	0x31, 0x00,
	0x32, 0xff,
	0x33, 0x00,
	0x34, 0x50,
	0x35, 0x7f,
	0x36, 0x00,
	0x37, 0x20,
	0x38, 0x00,
	0x40, 0x1c,
	0x41, 0xff,
	0x42, 0x29,
	0x43, 0x00,
	0x44, 0xff,
	0x45, 0x00,
	0x46, 0x00,
	0x49, 0x04,
	0x4a, 0xff,
	0x4b, 0x7f,
	0x52, 0x30,
	0x55, 0xae,
	0x56, 0x47,
	0x57, 0xe1,
	0x58, 0x3a,
	0x5a, 0x1e,
	0x5b, 0x34,
	0x60, 0x00,
	0x63, 0x00,
	0x64, 0x00,
	0x65, 0x00,
	0x66, 0x00,
	0x67, 0x00,
	0x68, 0x00,
	0x69, 0x00,
	0x6a, 0x02,
	0x6b, 0x00,
	0x70, 0xff,
	0x71, 0x00,
	0x72, 0x00,
	0x73, 0x00,
	0x74, 0x0c,
	0x80, 0x00,
	0x81, 0x00,
	0x82, 0x00,
	0x83, 0x00,
	0x84, 0x04,
	0x85, 0x80,
	0x86, 0x24,
	0x87, 0x78,
	0x88, 0x00,
	0x89, 0x00,
	0x90, 0x01,
	0x91, 0x01,
	0xa0, 0x00,
	0xa1, 0x00,
	0xa2, 0x00,
	0xb0, 0x91,
	0xb1, 0x0b,
	0xc0, 0x53,
	0xc1, 0x70,
	0xc2, 0x12,
	0xd0, 0x00,
	0xd1, 0x00,
	0xd2, 0x00,
	0xd3, 0x00,
	0xd4, 0x00,
	0xd5, 0x00,
	0xde, 0x00,
	0xdf, 0x00,
	0x61, 0x49,
	0x62, 0x0b,
	0x53, 0x08,
	0x59, 0x08,
};


static int stv0297_writereg(struct stv0297_state *state, u8 reg, u8 data)
{
	int ret;
	u8 buf[] = { reg, data };
	struct i2c_msg msg = {.addr = state->config->demod_address,.flags = 0,.buf = buf,.len = 2 };

	ret = i2c_transfer(state->i2c, &msg, 1);

	if (ret != 1)
		dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
			"ret == %i)\n", __FUNCTION__, reg, data, ret);

	return (ret != 1) ? -1 : 0;
}

static int stv0297_readreg(struct stv0297_state *state, u8 reg)
{
	int ret;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msg[] = { {.addr = state->config->demod_address,.flags = 0,.buf = b0,.len =
				  1},
	{.addr = state->config->demod_address,.flags = I2C_M_RD,.buf = b1,.len = 1}
	};

	// this device needs a STOP between the register and data
	if ((ret = i2c_transfer(state->i2c, &msg[0], 1)) != 1) {
		dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", __FUNCTION__, reg, ret);
		return -1;
	}
	if ((ret = i2c_transfer(state->i2c, &msg[1], 1)) != 1) {
		dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n", __FUNCTION__, reg, ret);
		return -1;
	}

	return b1[0];
}

static int stv0297_writereg_mask(struct stv0297_state *state, u8 reg, u8 mask, u8 data)
{
	int val;

	val = stv0297_readreg(state, reg);
	val &= ~mask;
	val |= (data & mask);
	stv0297_writereg(state, reg, val);

	return 0;
}

static int stv0297_readregs(struct stv0297_state *state, u8 reg1