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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/media/video/cx23885/netup-init.c
17658 views
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/*

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 * netup-init.c

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 *

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 * NetUP Dual DVB-S2 CI driver

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 *

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 * Copyright (C) 2009 NetUP Inc.

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 * Copyright (C) 2009 Igor M. Liplianin <[email protected]>

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 * Copyright (C) 2009 Abylay Ospan <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 *

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 * GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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 */

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#include "cx23885.h"

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static void i2c_av_write(struct i2c_adapter *i2c, u16 reg, u8 val)

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{

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	int ret;

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	u8 buf[3];

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	struct i2c_msg msg = {

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		.addr	= 0x88 >> 1,

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		.flags	= 0,

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		.buf	= buf,

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		.len	= 3

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	};

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	buf[0] = reg >> 8;

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	buf[1] = reg & 0xff;

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	buf[2] = val;

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	ret = i2c_transfer(i2c, &msg, 1);

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	if (ret != 1)

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		printk(KERN_ERR "%s: i2c write error!\n", __func__);

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}

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static void i2c_av_write4(struct i2c_adapter *i2c, u16 reg, u32 val)

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{

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	int ret;

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	u8 buf[6];

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	struct i2c_msg msg = {

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		.addr	= 0x88 >> 1,

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		.flags	= 0,

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		.buf	= buf,

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		.len	= 6

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	};

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	buf[0] = reg >> 8;

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	buf[1] = reg & 0xff;

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	buf[2] = val & 0xff;

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	buf[3] = (val >> 8) & 0xff;

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	buf[4] = (val >> 16) & 0xff;

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	buf[5] = val >> 24;

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	ret = i2c_transfer(i2c, &msg, 1);

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	if (ret != 1)

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		printk(KERN_ERR "%s: i2c write error!\n", __func__);

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}

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static u8 i2c_av_read(struct i2c_adapter *i2c, u16 reg)

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{

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	int ret;

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	u8 buf[2];

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	struct i2c_msg msg = {

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		.addr	= 0x88 >> 1,

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		.flags	= 0,

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		.buf	= buf,

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		.len	= 2

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	};

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	buf[0] = reg >> 8;

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	buf[1] = reg & 0xff;

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	ret = i2c_transfer(i2c, &msg, 1);

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	if (ret != 1)

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		printk(KERN_ERR "%s: i2c write error!\n", __func__);

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	msg.flags = I2C_M_RD;

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	msg.len = 1;

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	ret = i2c_transfer(i2c, &msg, 1);

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	if (ret != 1)

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		printk(KERN_ERR "%s: i2c read error!\n", __func__);

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	return buf[0];

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}

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static void i2c_av_and_or(struct i2c_adapter *i2c, u16 reg, unsigned and_mask,

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								u8 or_value)

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{

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	i2c_av_write(i2c, reg, (i2c_av_read(i2c, reg) & and_mask) | or_value);

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}

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/* set 27MHz on AUX_CLK */

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void netup_initialize(struct cx23885_dev *dev)

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{

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	struct cx23885_i2c *i2c_bus = &dev->i2c_bus[2];

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	struct i2c_adapter *i2c = &i2c_bus->i2c_adap;

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	/* Stop microcontroller */

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	i2c_av_and_or(i2c, 0x803, ~0x10, 0x00);

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	/* Aux PLL frac for 27 MHz */

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	i2c_av_write4(i2c, 0x114, 0xea0eb3);

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	/* Aux PLL int for 27 MHz */

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	i2c_av_write4(i2c, 0x110, 0x090319);

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	/* start microcontroller */

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	i2c_av_and_or(i2c, 0x803, ~0x10, 0x10);

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}

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