kernel_samsung_msm8974/drivers/media/mtv/fc8300/fc8300_ppi.c

/*****************************************************************************
	Copyright(c) 2013 FCI Inc. All Rights Reserved

	File name : fc8300_ppi.c

	Description : source of EBI2/LCD interface

	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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

	History :
	----------------------------------------------------------------------
*******************************************************************************/
#include "linux/io.h"

#include "fci_types.h"
#include "fc8300_regs.h"
#include "fci_oal.h"

#define BBM_BASE_ADDR       0x00

#define PPI_LEN             0x10
#define PPI_REG             0x20
#define PPI_THR             0x30
#define PPI_READ            0x40
#define PPI_WRITE           0x00
#define PPI_AINC            0x80

#define FC8300_PPI_REG_OUT(x)      outb(x, BBM_BASE_ADDR)
#define FC8300_PPI_REG_IN      inb(BBM_BASE_ADDR)

s32 fc8300_ppi_init(HANDLE handle, u16 param1, u16 param2)
{
	OAL_CREATE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_byteread(HANDLE handle, DEVICEID devid, u16 addr, u8 *data)
{
	u16 length = 1;
	u8 command = PPI_READ;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	*data = FC8300_PPI_REG_IN;

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_wordread(HANDLE handle, DEVICEID devid, u16 addr, u16 *data)
{
	u16 length = 2;
	u8 command = PPI_AINC | PPI_READ;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	*data = FC8300_PPI_REG_IN;
	*data |= FC8300_PPI_REG_IN << 8;

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_longread(HANDLE handle, DEVICEID devid, u16 addr, u32 *data)
{
	u16 length = 4;
	u8 command = PPI_AINC | PPI_READ;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	*data = FC8300_PPI_REG_IN;
	*data |= FC8300_PPI_REG_IN << 8;
	*data |= FC8300_PPI_REG_IN << 16;
	*data |= FC8300_PPI_REG_IN << 24;

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_bulkread(HANDLE handle, DEVICEID devid,
		u16 addr, u8 *data, u16 length)
{
	s32 i;
	u8 command = PPI_AINC | PPI_READ;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	for (i = 0; i < length; i++)
		data[i] = FC8300_PPI_REG_IN;

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_bytewrite(HANDLE handle, DEVICEID devid, u16 addr, u8 data)
{
	u16 length = 1;
	u8 command = PPI_WRITE;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	FC8300_PPI_REG_OUT(data);

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_wordwrite(HANDLE handle, DEVICEID devid, u16 addr, u16 data)
{
	u16 length = 2;
	u8 command = PPI_AINC | PPI_WRITE;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	FC8300_PPI_REG_OUT(data & 0xff);
	FC8300_PPI_REG_OUT((data & 0xff00) >> 8);
	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_longwrite(HANDLE handle, DEVICEID devid, u16 addr, u32 data)
{
	u16 length = 4;
	u8 command = PPI_AINC | PPI_WRITE;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	FC8300_PPI_REG_OUT(data &  0x000000ff);
	FC8300_PPI_REG_OUT((data & 0x0000ff00) >> 8);
	FC8300_PPI_REG_OUT((data & 0x00ff0000) >> 16);
	FC8300_PPI_REG_OUT((data & 0xff000000) >> 24);
	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_bulkwrite(HANDLE handle, DEVICEID devid,
		u16 addr, u8 *data, u16 length)
{
	s32 i;
	u8 command = PPI_AINC | PPI_WRITE;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(length & 0xff);

	for (i = 0; i < length; i++)
		FC8300_PPI_REG_OUT(data[i]);

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_dataread(HANDLE handle, DEVICEID devid,
		u16 addr, u8 *data, u32 length)
{
	s32 i;
	u8 command = PPI_READ | PPI_THR;

	OAL_OBTAIN_SEMAPHORE();

	FC8300_PPI_REG_OUT((addr & 0xff00) >> 8);
	FC8300_PPI_REG_OUT(addr & 0xff);
	FC8300_PPI_REG_OUT(command);
	FC8300_PPI_REG_OUT(0);

	for (i = 0; i < length; i++)
		data[i] = FC8300_PPI_REG_IN;

	OAL_RELEASE_SEMAPHORE();

	return BBM_OK;
}

s32 fc8300_ppi_deinit(HANDLE handle)
{
	OAL_DELETE_SEMAPHORE();

	return BBM_OK;
}