/************************************************************************ * *      iic_piix4.c * *      The 'IIC_PIIX4' module implements the IIC device driver *      interface to be used via 'IIC' device driver services: * *        1) init  serial device:  configure and initialize IIC driver *        2) open  serial device:  not used *        3) close serial device:  not used *        4) read  serial device:  read IIC device *        5) write serial device:  write IIC device *        6) ctrl  serial device:  a) write+read IIC device *                                 b) test IIC device * * * ###################################################################### * * mips_start_of_legal_notice *  * Copyright (c) 2006 MIPS Technologies, Inc. All rights reserved. * * * Unpublished rights (if any) reserved under the copyright laws of the * United States of America and other countries. * * This code is proprietary to MIPS Technologies, Inc. ("MIPS * Technologies"). Any copying, reproducing, modifying or use of this code * (in whole or in part) that is not expressly permitted in writing by MIPS * Technologies or an authorized third party is strictly prohibited. At a * minimum, this code is protected under unfair competition and copyright * laws. Violations thereof may result in criminal penalties and fines. * * MIPS Technologies reserves the right to change this code to improve * function, design or otherwise. MIPS Technologies does not assume any * liability arising out of the application or use of this code, or of any * error or omission in such code. Any warranties, whether express, * statutory, implied or otherwise, including but not limited to the implied * warranties of merchantability or fitness for a particular purpose, are * excluded. Except as expressly provided in any written license agreement * from MIPS Technologies or an authorized third party, the furnishing of * this code does not give recipient any license to any intellectual * property rights, including any patent rights, that cover this code. * * This code shall not be exported, reexported, transferred, or released, * directly or indirectly, in violation of the law of any country or * international law, regulation, treaty, Executive Order, statute, * amendments or supplements thereto. Should a conflict arise regarding the * export, reexport, transfer, or release of this code, the laws of the * United States of America shall be the governing law. * * This code constitutes one or more of the following: commercial computer * software, commercial computer software documentation or other commercial * items. If the user of this code, or any related documentation of any * kind, including related technical data or manuals, is an agency, * department, or other entity of the United States government * ("Government"), the use, duplication, reproduction, release, * modification, disclosure, or transfer of this code, or any related * documentation of any kind, is restricted in accordance with Federal * Acquisition Regulation 12.212 for civilian agencies and Defense Federal * Acquisition Regulation Supplement 227.7202 for military agencies. The use * of this code by the Government is further restricted in accordance with * the terms of the license agreement(s) and/or applicable contract terms * and conditions covering this code from MIPS Technologies or an authorized * third party. * * * *  * mips_end_of_legal_notice *  * ************************************************************************//************************************************************************ *      Include files ************************************************************************/#include <sysdefs.h>#include <sys_api.h>#include <io_api.h>#include <syserror.h>#include <syscon_api.h>#include <sysdev.h>#include <iic_api.h>#include <iic_piix4_api.h>#include <piix4.h>/************************************************************************ *      Definitions ************************************************************************/#define SMB_WRITE( offset, data ) \    REG8( sys_reg_addr( bigend, sizeof(UINT8), base, offset ) ) = data;#define SMB_READ( offset, p_data ) \    *p_data = REG8( sys_reg_addr( bigend, sizeof(UINT8), base, offset ) );/************************************************************************ *  Macro Definitions*************************************************************************//************************************************************************ *      Public variables ************************************************************************//************************************************************************ *      Static variables ************************************************************************/static void *base;static bool bigend;/************************************************************************ *      Static function prototypes ************************************************************************/static INT32 iic_piix4_init(    UINT32 major,		/* IN: major device number             */    UINT32 minor,		/* IN: minor device number             */    void   *param );		/* INOUT: device parameter block       */static INT32 iic_piix4_read(    UINT32 major,		/* IN: major device number             */    UINT32 minor,		/* IN: minor device number             */    t_IIC_read_descriptor *param );  /* INOUT: read buffer	       */static INT32 iic_piix4_write(    UINT32 major,		/* IN: major device number             */    UINT32 minor,		/* IN: minor device number             */    t_IIC_write_descriptor *param );	     /* IN: write buffer       */static INT32 iic_piix4_ctrl(    UINT32 major,		/* IN: major device number             */    UINT32 minor,		/* IN: minor device number             */    t_IIC_ctrl_descriptor *param );	     /* INOUT: IIC device data */static void iic_piix4_poll( void );/************************************************************************ *      Implementation : Static functions ************************************************************************//************************************************************************ * *                          iic_piix4_init *  Description : *  ------------- *  This service initializes the IIC driver * *  Parameters : *  ------------ * *  'major',     IN,    major device number *  'minor',     IN,    not used *  'param',     INOUT, not used * *  Return values : *  --------------- * *  'OK'(=0) or error code * ************************************************************************/static INT32 iic_piix4_init(    UINT32 major,		/* IN: major device number             */    UINT32 minor,		/* IN: minor device number             */    void   *param )		/* INOUT: device parameter block       */{    SYSCON_read( SYSCON_BOARD_PIIX4_SMB_BASE_ID,		 (void *)&base,		 sizeof(UINT32) );    base = (void *)KSEG1( (UINT32)base );    SYSCON_read( SYSCON_COM_PIIX4_IIC_BIGEND_ID,		 (void *)&bigend,		 sizeof(bool) );    return OK;}/************************************************************************ * *                          iic_piix4_read *  Description : *  ------------- *  This service reads data from the specified IIC device into the *  user allocated variable, *param. * *  Parameters : *  ------------ * *  'major',     IN,    major device number *  'minor',     IN,    minor device number for multi device drivers *  'param',     INOUT, variable of type, t_IIC_read_descriptor. * *  Return values : *  --------------- * *  'OK' = 0x00:              IIC device data read into user variable *  'ERROR_IIC_COMM_ERROR':   communication error detected * ************************************************************************/static INT32 iic_piix4_read(    UINT32 major,		/* IN: major device number             */    UINT32 minor,		/* IN: minor device number             */    t_IIC_read_descriptor *param )   /* INOUT: read buffer	       */{    /* TBD : Not ready */    return ERROR_IIC_COMM_ERROR;}/************************************************************************ * *                          iic_piix4_write *  Description : *  ------------- *  This service writes user data to the specified IIC device. * *  Parameters : *  ------------ * *  'major',     IN,    major device number