i2cmcp.c

大名鼎鼎的mpc8260的bsp源代码

/* i2cMcp.c - I2C/SPI Microcode Patch Package Module */

/* Copyright 1998 Wind River Systems, Inc. */
/* Copyright 1997,1998 Motorola, Inc., All Rights Reserved */

/*
modification history
--------------------
01c,21sep98,fle  doc : fixed some few problems with some funcion headers
01b,20nov97,rhk  modified to fit WRS coding standards
01a,11sep97,scb  Adapted from rb's mbxbug version
*/

/*
DESCRIPTION

This module applies a PPC8xx CPM microcode patch to the dual-port RAM.

By default the parameter RAM of SCC1-Ethernet is overlaid with the parameter
RAM of I2C/SPI device, making it not possible to use both SCC1-Ethernet and
I2C/SPI devices at the same time.

The patch installed by this module corrects this problem by modifying the
I2C/SPI programming model by relocating the I2C/SPI parameter RAM, permitting
concurrent operation of SCC1-Ethernet and I2C/SPI.

*/

/* includes */

#include "vxWorks.h"            /* types */
#include "drv/multi/ppc860Siu.h"
#include "config.h"             /* mbx860 BSP definitions */
#include "vxLib.h"
#include "ads860.h"

/* defines */
#define I2C_DPRAM_OFFSET(dprama)    ((UINT)(dprama)-(UINT)(DPRAM_ADDRESS))

/* Macro for all i/o operations to use */

#define IO_SYNC  __asm__("      sync")

/* RISC microcode patch data arrays */

LOCAL UINT i2cMcpBlock0Data[] = 
    {
    0x7FFFEFD9, 0x3FFD0000, 0x7FFB49F7, 0x7FF90000,
    0x5FEFADF7, 0x5F89ADF7, 0x5FEFAFF7, 0x5F89AFF7,
    0x3A9CFBC8, 0xE7C0EDF0, 0x77C1E1BB, 0xF4DC7F1D,
    0xABAD932F, 0x4E08FDCF, 0x6E0FAFF8, 0x7CCF76CF,
    0xFD1FF9CF, 0xABF88DC6, 0xAB5679F7, 0xB0937383,
    0xDFCE79F7, 0xB091E6BB, 0xE5BBE74F, 0xB3FA6F0F,
    0x6FFB76CE, 0xEE0DF9CF, 0x2BFBEFEF, 0xCFEEF9CF,
    0x76CEAD24, 0x90B2DF9A, 0x7FDDD0BF, 0x4BF847FD,
    0x7CCF76CE, 0xCFEF7E1F, 0x7F1D7DFD, 0xF0B6EF71,
    0x7FC177C1, 0xFBC86079, 0xE722FBC8, 0x5FFFDFFF,
    0x5FB2FFFB, 0xFBC8F3C8, 0x94A67F01, 0x7F1D5F39,
    0xAFE85F5E, 0xFFDFDF96, 0xCB9FAF7D, 0x5FC1AFED,
    0x8C1C5FC1, 0xAFDD5FC3, 0xDF9A7EFD, 0xB0B25FB2,
    0xFFFEABAD, 0x5FB2FFFE, 0x5FCE600B, 0xE6BB600B,
    0x5FCEDFC6, 0x27FBEFDF, 0x5FC8CFDE, 0x3A9CE7C0,
    0xEDF0F3C8, 0x7F0154CD, 0x7F1D2D3D, 0x363A7570,
    0x7E0AF1CE, 0x37EF2E68, 0x7FEE10EC, 0xADF8EFDE,
    0xCFEAE52F, 0x7D0FE12B, 0xF1CE5F65, 0x7E0A4DF8,
    0xCFEA5F72, 0x7D0BEFEE, 0xCFEA5F74, 0xE522EFDE,
    0x5F74CFDA, 0x0B627385, 0xDF627E0A, 0x30D8145B,
    0xBFFFF3C8, 0x5FFFDFFF, 0xA7F85F5E, 0xBFFE7F7D,
    0x10D31450, 0x5F36BFFF, 0xAF785F5E, 0xBFFDA7F8,
    0x5F36BFFE, 0x77FD30C0, 0x4E08FDCF, 0xE5FF6E0F,
    0xAFF87E1F, 0x7E0FFD1F, 0xF1CF5F1B, 0xABF80D5E,
    0x5F5EFFEF, 0x79F730A2, 0xAFDD5F34, 0x47F85F34,
    0xAFED7FDD, 0x50B24978, 0x47FD7F1D, 0x7DFD70AD,
    0xEF717EC1, 0x6BA47F01, 0x2D267EFD, 0x30DE5F5E,
    0xFFFD5F5E, 0xFFEF5F5E, 0xFFDF0CA0, 0xAFED0A9E,
    0xAFDD0C3A, 0x5F3AAFBD, 0x7FBDB082, 0x5F8247F8,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000
    };

LOCAL UINT i2cMcpBlock0Size = (sizeof(i2cMcpBlock0Data)/sizeof(UINT));
LOCAL UINT i2cMcpBlock0Ofst = 0x0000;

LOCAL UINT i2cMcpBlock1Data[] = 
    {
    0x3E303430, 0x34343737, 0xABF7BF9B, 0x994B4FBD,
    0xBD599493, 0x349FFF37, 0xFB9B177D, 0xD9936956,
    0xBBFDD697, 0xBDD2FD11, 0x31DB9BB3, 0x63139637,
    0x93733693, 0x193137F7, 0x331737AF, 0x7BB9B999,
    0xBB197957, 0x7FDFD3D5, 0x73B773F7, 0x37933B99,
    0x1D115316, 0x99315315, 0x31694BF4, 0xFBDBD359,
    0x31497353, 0x76956D69, 0x7B9D9693, 0x13131979,
    0x79376935, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000,
    0x00000000, 0x00000000, 0x00000000, 0x00000000
    };

LOCAL UINT i2cMcpBlock1Size = (sizeof(i2cMcpBlock1Data)/sizeof(UINT));
LOCAL UINT i2cMcpBlock1Ofst = 0x0F00;

/******************************************************************************
*
* i2cMcp - download RISC microcode patch
*
* This function's purpose is to install the RISC microcode patch.
*
* RETURNS: N/A
*/

void i2cMcp ()
    {
    register UINT *pRmc;       /* RISC microcode pointer */
    register UINT *pDpr;       /* dual port RAM pointer */

    register UINT counter;      /* count variable */

    UINT immrVal = INTERNAL_MEM_MAP_ADDR; /* Base address of Internal Memory */
    
    /* If patch already installed, simply return */

    if (PPC860_I2C_PATCH_INSTALLED)
	return;

    /* download first portion of RISC microcode patch */

    pDpr = (UINT *)((UINT)DPRAM_ADDRESS + (UINT)i2cMcpBlock0Ofst);

    pRmc = (UINT *)&i2cMcpBlock0Data[0];

    for (counter = i2cMcpBlock0Size; counter; counter--, pDpr++, pRmc++)
        {
        *pDpr = *pRmc;
        }
    IO_SYNC;

    /* download second portion of RISC microcode patch */

    pDpr = (UINT *)((UINT)DPRAM_ADDRESS + (UINT)i2cMcpBlock1Ofst);

    pRmc = (UINT *)&i2cMcpBlock1Data[0];
    for (counter = i2cMcpBlock1Size; counter; counter--, pDpr++, pRmc++)
        {
        *pDpr = *pRmc;
        }
    IO_SYNC;

    /*
     * enable RISC microcode patch
     *
     * note: the RCTRx registers are not documented in the MPC8xx
     * user's manuals
     */

    /**RCTR1(immrVal) = 0x802a; 
    IO_SYNC;
    *RCTR2(immrVal) = 0x8028; 
    IO_SYNC;*/
    *RCTR3(immrVal) = 0x802e; /*  We're only relocating the I2C parameters */
    IO_SYNC;
    *RCTR4(immrVal) = 0x802c; 
    IO_SYNC;
    *RCCR(immrVal)  = 0x0001; 
    IO_SYNC;

    /*
     * initialize relocatable parameter RAM base, relocate to the
     * parameter RAM of IDMA1 (this is not used on Motorola H/W)
     */

    *(I2C_RPBASE(PPC860_DPR_I2C_INITIAL(DPRAM_ADDRESS))) =
    I2C_DPRAM_OFFSET(PPC860_DPR_IDMA1(DPRAM_ADDRESS));

    }