fpga_scm.c

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2002
 * Wolfgang Grandegger, DENX Software Engineering, [e-mail].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 */


#include <common.h>
#include <mpc8260.h>
#include <common.h>
#include "../common/fpga.h"

fpga_t fpga_list[] = {
    { "FIOX" , CFG_FIOX_BASE ,
      CFG_PD_FIOX_INIT , CFG_PD_FIOX_PROG , CFG_PD_FIOX_DONE  },
    { "FDOHM", CFG_FDOHM_BASE,
      CFG_PD_FDOHM_INIT, CFG_PD_FDOHM_PROG, CFG_PD_FDOHM_DONE }
};
int fpga_count = sizeof(fpga_list) / sizeof(fpga_t);


ulong fpga_control (fpga_t* fpga, int cmd)
{
    volatile immap_t *immr  = (immap_t *)CFG_IMMR;

    switch (cmd) {
    case FPGA_INIT_IS_HIGH:
	immr->im_ioport.iop_pdird &= ~fpga->init_mask; /* input */
	return (immr->im_ioport.iop_pdatd & fpga->init_mask) ? 1:0;

    case FPGA_INIT_SET_LOW:
	immr->im_ioport.iop_pdird |=  fpga->init_mask; /* output */
	immr->im_ioport.iop_pdatd &= ~fpga->init_mask;
	break;

    case FPGA_INIT_SET_HIGH:
	immr->im_ioport.iop_pdird |= fpga->init_mask; /* output */
	immr->im_ioport.iop_pdatd |= fpga->init_mask;
	break;

    case FPGA_PROG_SET_LOW:
	immr->im_ioport.iop_pdatd &= ~fpga->prog_mask;
	break;

    case FPGA_PROG_SET_HIGH:
	immr->im_ioport.iop_pdatd |= fpga->prog_mask;
	break;

    case FPGA_DONE_IS_HIGH:
	return (immr->im_ioport.iop_pdatd & fpga->done_mask) ? 1:0;

    case FPGA_READ_MODE:
	break;

    case FPGA_LOAD_MODE:
	break;

    case FPGA_GET_ID:
	if (fpga->conf_base == CFG_FIOX_BASE) {
	    ulong ver = *(volatile ulong *)(fpga->conf_base + 0x10);
	    return ((ver >> 10) & 0xf) + ((ver >> 2) & 0xf0);
	}
	else if (fpga->conf_base == CFG_FDOHM_BASE) {
	    return (*(volatile ushort *)fpga->conf_base) & 0xff;
	}
	else {
	    return *(volatile ulong *)fpga->conf_base;
	}

    case FPGA_INIT_PORTS:
	immr->im_ioport.iop_ppard &= ~fpga->init_mask; /* INIT I/O */
	immr->im_ioport.iop_psord &= ~fpga->init_mask;
	immr->im_ioport.iop_pdird &= ~fpga->init_mask;

	immr->im_ioport.iop_ppard &= ~fpga->prog_mask; /* PROG Output */
	immr->im_ioport.iop_psord &= ~fpga->prog_mask;
	immr->im_ioport.iop_pdird |=  fpga->prog_mask;

	immr->im_ioport.iop_ppard &= ~fpga->done_mask; /* DONE Input */
	immr->im_ioport.iop_psord &= ~fpga->done_mask;
	immr->im_ioport.iop_pdird &= ~fpga->done_mask;

	break;

    }
    return 0;
}