syscon_platform.c

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/************************************************************************
 *
 *  syscon_platform.c
 *
 *  Platform specific parts of SYSCON module (except TTY related parts)
 *
 * ######################################################################
 *
 * mips_start_of_legal_notice
 * 
 * Copyright (c) 2004 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 * Unpublished rights (if any) reserved under the copyright laws of the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 <sysdev.h>
#include <syscon_api.h>
#include <syscon.h>
#include <sys_api.h>
#include <string.h>
#include <excep_api.h>
#include <pci_api.h>
#include <io_api.h>
#include <eeprom_nm24c09_layout.h>
#include <eeprom_api.h>

#include <spd.h>

#include <product.h>
#include <atlas.h>
#include <sead.h>
#include <malta.h>

#include <tmra.h>   /* Atlas specific   */
#include <icta.h>   /* Atlas specific   */
#include <piix4.h>  /* Malta specific */

/************************************************************************
 *  Definitions
 ************************************************************************/

#define WORD0_OFS    0x00000       /* Word0:                       */
#define WORD1_OFS    0x00004       /* Word1:                       */

/************************************************************************
 *  Public variables
 ************************************************************************/

/************************************************************************
 *  Static variables
 ************************************************************************/

/* Names of boards/RTL */
static char	          *name_atlas      = "Atlas";
static char		  *name_sead       = "SEAD";
static char		  *name_sead2      = "SEAD-2";
static char		  *name_malta      = "Malta";
static char		  *name_basic_rtl  = "Basic RTL";

/* Pointer to array of objects */
static t_syscon_obj       *syscon_objects;

/* Size of ASCII display (if any) on platform */
static UINT32		  alpha_display_size;
/* Addresses of individual ASCII charactes on ASCII display */
static volatile UINT32    *alpha_io[8];

/* Mapping between hex digit and ASCII character (e.g 0-> ASCII(0x30)) */
static const UINT8        bin2char[16] = { 0x30, 0x31, 0x32, 0x33, 
					   0x34, 0x35, 0x36, 0x37,
					   0x38, 0x39, 0x41, 0x42,
					   0x43, 0x44, 0x45, 0x46  };

/* Register size */
static UINT8  size8  = sizeof(UINT8);
static UINT8  size32 = sizeof(UINT32);

/* MAC address and Serial Number */
static UINT8       amd_mac_addr[8];
static t_sn_bcd    sn_buffer;
static t_mac_addr  mac_addr_buffer;
static t_mac_addr  *mac_addr_read = NULL;
static t_sn_bcd	   *sn_read       = NULL;

/* EEPROM definitions */
static UINT8	           eeprom_count;
static t_syscon_eeprom_def eeprom_def[2];

static char *eeprom_system_name  = "sys";
static char *eeprom_system_descr = "Device for storing system data";

static char *eeprom_spd0_name    = "spd0";
static char *eeprom_spd0_descr   = "Device used for SDRAM parameters (SPD)";

/************************************************************************
 *  Static function prototypes
 ************************************************************************/

static INT32 
eeprom_read( 
    UINT32  minor,		/* Minor device number			*/
    UINT32  offset,		/* Byte position			*/
    UINT32  length,		/* Byte count				*/
    void    *user_variable );   /* Buffer for data			*/


/************************************************************************
 *  Implementation : Static functions registered for handling particular 
 *  SYSCON objects for particular platform(s)
 ************************************************************************/



/************************************************************************
 *  board_productid_generic_read
 ************************************************************************/
static UINT32
board_productid_generic_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    /*  Determine PRODUCT ID using MIPS_REVISION register
     *  (special hw address reserved on Atlas, Malta, SEAD, SEAD-2 
     *   boards).
     */

    *(UINT32 *)param = (REGP(KSEG1BASE, MIPS_REVISION)
                                      & MIPS_REVISION_PROID_MSK)
                                     >> MIPS_REVISION_PROID_SHF;
    return OK;
}


/************************************************************************
 *  board_productrev_generic_read
 ************************************************************************/
static UINT32
board_productrev_generic_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    /*  Determine PRODUCT ID using MIPS_REVISION register
     *  (special hw address reserved on Atlas, Malta, SEAD, SEAD-2 
     *   boards).
     */

    *(UINT32 *)param = (REGP(KSEG1BASE, MIPS_REVISION)
                                      & MIPS_REVISION_PRORV_MSK)
                                     >> MIPS_REVISION_PRORV_SHF;
    return OK;
}


/************************************************************************
 *  board_revision_generic_read
 ************************************************************************/
static UINT32
board_revision_generic_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    /*  Determine PRODUCT ID using MIPS_REVISION register
     *  (special hw address reserved on Atlas, Malta, SEAD, SEAD-2 
     *   boards).
     */

    *(UINT32 *)param = REGP(KSEG1BASE, MIPS_REVISION);
    return OK;
}


/************************************************************************
 *    board_systemram_refresh_ns_sead_read
 ************************************************************************/
static UINT32
board_systemram_refresh_ns_sead_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval;

    regval = REG32(KSEG1(SEAD_SD_TREFRESH));

    *(UINT32 *)param = CYCLES2NS( REGFIELD(regval, SEAD_SD_TREFRESH_TREF) );

    return OK;
}


/************************************************************************
 *    board_systemram_refresh_ns_sead_write
 ************************************************************************/
static UINT32
board_systemram_refresh_ns_sead_write(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 refcount;
  
    NS2COUNT_ROUND_DOWN( *(UINT32 *)param, refcount );

    REG32(KSEG1(SEAD_SD_TREFRESH)) = refcount;

    return OK;
}


/************************************************************************
 *    board_systemram_srasprchg_cycles_sead_read
 ************************************************************************/
static UINT32
board_systemram_srasprchg_cycles_sead_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval;

    regval = REG32(KSEG1(SEAD_SD_LATENCIES));

    *(UINT32 *)param = REGFIELD(regval, SEAD_SD_LATENCIES_TRP);

    return OK;
}


/************************************************************************
 *    board_systemram_srasprchg_cycles_sead_write
 ************************************************************************/
static UINT32
board_systemram_srasprchg_cycles_sead_write(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval, trp;

    regval = REG32(KSEG1(SEAD_SD_LATENCIES));

    if( *(UINT32 *)param < SEAD_SD_LATENCIES_TRP_MIN )
        trp = SEAD_SD_LATENCIES_TRP_MIN;
    else if( *(UINT32 *)param > SEAD_SD_LATENCIES_TRP_MAX )
        trp = SEAD_SD_LATENCIES_TRP_MAX;
    else
        trp = *(UINT32 *)param;
      
    regval &= ~SEAD_SD_LATENCIES_TRP_MSK;
    regval |= (trp << SEAD_SD_LATENCIES_TRP_SHF);

    REG32(KSEG1(SEAD_SD_LATENCIES)) = regval;
    return OK;
}


/************************************************************************
 *    board_systemram_sras2scas_cycles_sead_read  
 ************************************************************************/
static UINT32
board_systemram_sras2scas_cycles_sead_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval;

    regval = REG32(KSEG1(SEAD_SD_LATENCIES));

    *(UINT32 *)param = REGFIELD(regval, SEAD_SD_LATENCIES_TRCD);

    return OK;
}


/************************************************************************
 *    board_systemram_sras2scas_cycles_sead_write  
 ************************************************************************/
static UINT32
board_systemram_sras2scas_cycles_sead_write(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval, trcd;

    regval = REG32(KSEG1(SEAD_SD_LATENCIES));

    if( *(UINT32 *)param < SEAD_SD_LATENCIES_TRCD_MIN )
        trcd = SEAD_SD_LATENCIES_TRCD_MIN;
    else if( *(UINT32 *)param > SEAD_SD_LATENCIES_TRCD_MAX )
        trcd = SEAD_SD_LATENCIES_TRCD_MAX;
    else
        trcd = *(UINT32 *)param;
      
    regval &= ~SEAD_SD_LATENCIES_TRCD_MSK;
    regval |= (trcd << SEAD_SD_LATENCIES_TRCD_SHF);

    REG32(KSEG1(SEAD_SD_LATENCIES)) = regval;
    return OK;
}


/************************************************************************
 *    board_systemram_caslat_cycles_sead_read
 ************************************************************************/
static UINT32
board_systemram_caslat_cycles_sead_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval;

    regval = REG32(KSEG1(SEAD_SD_MRSCODE));

    *(UINT32 *)param = REGFIELD(regval, SEAD_SD_MRSCODE_CL);

    return OK;
}


/************************************************************************
 *    board_systemram_read_burstlen_sead_read
 ************************************************************************/
static UINT32
board_systemram_read_burstlen_sead_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval;

    regval = REG32(KSEG1(SEAD_SD_MRSCODE));

    switch( REGFIELD(regval, SEAD_SD_MRSCODE_BL ) )
    {
      case 0 :
        *(UINT32 *)param = 1;
	break;
      case 1 :
        *(UINT32 *)param = 2;
	break;
      case 2 :
        *(UINT32 *)param = 4;
	break;
      case 3 :
        *(UINT32 *)param = 8;
	break;
      default : /* Should not happen */
        return ERROR_SYSCON_UNKNOWN_PARAM;
    }

    return OK;
}


/************************************************************************
 *    board_systemram_write_burstlen_sead_read
 ************************************************************************/
static UINT32
board_systemram_write_burstlen_sead_read(
    void   *param,
    void   *data,
    UINT32 size )
{
    UINT32 regval;

    regval = REG32(KSEG1(SEAD_SD_MRSCODE));

    switch( REGFIELD(regval, SEAD_SD_MRSCODE_WBL) )
    {
      case 0 :
        return board_systemram_read_burstlen_sead_read(
	           param, data, size );
      case 1 :
        *(UINT32 *)param = 1;
	break;
      default : /* Should not happen */
        return ERROR_SYSCON_UNKNOWN_PARAM;
    }

    return OK;
}


/************************************************************************
 *  com_en0_major_device_atlas_read
 ************************************************************************/
static UINT32
com_en0_major_device_atlas_read(
    void   *param,
    void   *data,
    UINT32 size )
{
   /*  On Atlas, the Philips SAA9730 IO controller, implements
    *  the LAN device; however 10 MBit/s only          
    */
    *(UINT32 *)param = SYS_MAJOR_LAN_SAA9730;
    return OK;
}


/************************************************************************
 *  com_en0_major_device_malta_read
 ************************************************************************/
static UINT32
com_en0_major_device_malta_read(
    void   *param,
    void   *data,
    UINT32 size )
{
   /*  On Malta, the AMD 79C973 controller, implements
    *  the LAN device; speed and duplex mode are autonegotiated 
    */
    *(UINT32 *)param = SYS_MAJOR_LAN_AM79C973;
    return OK;
}

 
/************************************************************************
 *  com_en0_intline_atlas_read
 ************************************************************************/
static UINT32
com_en0_intline_atlas_read(
    void   *param,
    void   *data,
    UINT32 size )