bsp.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 2000
 * Wolfgang Denk, 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
 *
 * hacked for Hymod FPGA support by [e-mail], 29-Jan-01
 */

#include <common.h>
#include <command.h>
#include <net.h>
#include <i2c.h>
#include <asm/iopin_8260.h>
#include <cmd_bsp.h>

/*-----------------------------------------------------------------------
 * Board Special Commands: FPGA load/store, EEPROM erase
 */

#if (CONFIG_COMMANDS & CFG_CMD_BSP)

#define LOAD_SUCCESS		0
#define LOAD_FAIL_NOCONF	1
#define LOAD_FAIL_NOINIT	2
#define LOAD_FAIL_NODONE	3

#define STORE_SUCCESS		0

/*
 * Programming the Hymod FPGAs
 *
 * The 8260 io port config table is set up so that the INIT pin is
 * held Low (Open Drain output 0) - this will delay the automatic
 * Power-On config until INIT is released (by making it an input).
 *
 * If the FPGA has been programmed before, then the assertion of PROGRAM
 * will initiate configuration (i.e. it begins clearing the RAM).
 *
 * When the FPGA is ready to receive configuration data (either after
 * releasing INIT after Power-On, or after asserting PROGRAM), it will
 * pull INIT high.
 *
 * Notes from Paul Dunn:
 *
 *  1. program pin should be forced low for >= 300ns
 *     (about 20 bus clock cycles minimum).
 *
 *  2. then wait for init to go high, which signals
 *     that the FPGA has cleared its internal memory
 *     and is ready to load
 *
 *  3. perform load writes of entire config file
 *
 *  4. wait for done to go high, which should be
 *     within a few bus clock cycles. If done has not
 *     gone high after reasonable period, then load
 *     has not worked (wait several ms?)
 */

int fpga_load (int mezz, uchar * addr, ulong size)
{
	DECLARE_GLOBAL_DATA_PTR;

	hymod_conf_t *cp = &gd->bd->bi_hymod_conf;
	xlx_iopins_t *fpgaio;
	volatile uchar *fpgabase;
	volatile uint cnt;
	uchar *eaddr = addr + size;
	int result;

	if (mezz) {
		if (!cp->mezz.mmap[0].prog.exists)
			return (LOAD_FAIL_NOCONF);
		fpgabase = (uchar *) cp->mezz.mmap[0].prog.base;
		fpgaio = &cp->mezz.iopins[0];
	} else {
		if (!cp->main.mmap[0].prog.exists)
			return (LOAD_FAIL_NOCONF);
		fpgabase = (uchar *) cp->main.mmap[0].prog.base;
		fpgaio = &cp->main.iopins[0];
	}

	/* set enable HIGH if required */
	if (fpgaio->enable_pin.flag)
		iopin_set_high (&fpgaio->enable_pin);

	/* ensure INIT is released (set it to be an input) */
	iopin_set_in (&fpgaio->init_pin);

	/* toggle PROG Low then High (will already be Low after Power-On) */
	iopin_set_low (&fpgaio->prog_pin);
	udelay (1);					/* minimum 300ns - 1usec should do it */
	iopin_set_high (&fpgaio->prog_pin);

	/* wait for INIT High */
	cnt = 0;
	while (!iopin_is_high (&fpgaio->init_pin))
		if (++cnt == 10000000) {
			result = LOAD_FAIL_NOINIT;
			goto done;
		}

	/* write configuration data */
	while (addr < eaddr)
		*fpgabase = *addr++;

	/* wait for DONE High */
	cnt = 0;
	while (!iopin_is_high (&fpgaio->done_pin))
		if (++cnt == 100000000) {
			result = LOAD_FAIL_NODONE;
			goto done;
		}

	/* success */
	result = LOAD_SUCCESS;

  done:

	if (fpgaio->enable_pin.flag)
		iopin_set_low (&fpgaio->enable_pin);

	return (result);
}

/* ------------------------------------------------------------------------- */
int
do_fpga (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	uchar *addr, *save_addr;
	ulong size;
	int mezz, arg, result;

	switch (argc) {

	case 0:
	case 1:
		break;

	case 2:
		if (strcmp (argv[1], "info") == 0) {
			printf ("\nHymod FPGA Info...\n");
			printf ("				Address		Size\n");
			printf ("	Main Configuration:	0x%08x	%d\n",
					FPGA_MAIN_CFG_BASE, FPGA_MAIN_CFG_SIZE);
			printf ("	Main Register:		0x%08x	%d\n",
					FPGA_MAIN_REG_BASE, FPGA_MAIN_REG_SIZE);
			printf ("	Main Port:		0x%08x	%d\n",
					FPGA_MAIN_PORT_BASE, FPGA_MAIN_PORT_SIZE);
			printf ("	Mezz Configuration:	0x%08x	%d\n",
					FPGA_MEZZ_CFG_BASE, FPGA_MEZZ_CFG_SIZE);
			return 0;
		}
		break;

	case 3:
		if (strcmp (argv[1], "store") == 0) {
			addr = (uchar *) simple_strtoul (argv[2], NULL, 16);

			save_addr = addr;
#if 0
			/* reading config data unimplemented */
			while VM
			  :more config data * addr++ = *fpga;
		  result = VM:? ? ?
#else
			result = 0;
#endif
			if (result == STORE_SUCCESS) {
				printf ("SUCCEEDED (%d bytes)\n", addr - save_addr);
				return 0;
			} else
				printf ("FAILED (%d bytes)\n", addr - save_addr);
			return 1;
		}
		break;

	case 4:
		if (strcmp (argv[1], "tftp") == 0) {
			copy_filename (BootFile, argv[2], sizeof (BootFile));
			load_addr = simple_strtoul (argv[3], NULL, 16);

			if (NetLoop (TFTP) <= 0) {
				printf ("tftp transfer failed - aborting fgpa load\n");
				return 1;
			}

			if (NetBootFileXferSize == 0) {
				printf ("can't determine file size - aborting fpga load\n");
				return 1;
			}

			printf ("File transfer succeeded - beginning fpga load...");

			result = fpga_load (0, (uchar *) load_addr,
								NetBootFileXferSize);
			if (result == LOAD_SUCCESS) {
				printf ("SUCCEEDED\n");
				return 0;
			} else if (result == LOAD_FAIL_NOINIT)
				printf ("FAILED (no INIT)\n");
			else
				printf ("FAILED (no DONE)\n");
			return 1;

		}
		/* fall through ... */

	case 5:
		if (strcmp (argv[1], "load") == 0) {
			if (argc == 5) {
				if (strcmp (argv[2], "main") == 0)
					mezz = 0;
				else if (strcmp (argv[2], "mezz") == 0)
					mezz = 1;
				else {
					printf ("FPGA type must be either `main' or `mezz'\n");
					return 1;
				}
				arg = 3;
			} else {
				mezz = 0;
				arg = 2;
			}
			addr = (uchar *) simple_strtoul (argv[arg++], NULL, 16);
			size = (ulong) simple_strtoul (argv[arg], NULL, 16);

			result = fpga_load (mezz, addr, size);
			if (result == LOAD_SUCCESS) {
				printf ("SUCCEEDED\n");
				return 0;
			} else if (result == LOAD_FAIL_NOINIT)
				printf ("FAILED (no INIT)\n");
			else
				printf ("FAILED (no DONE)\n");
			return 1;
		}
		break;

	default:
		break;
	}

	printf ("Usage:\n%s\n", cmdtp->usage);
	return 1;
}

/* ------------------------------------------------------------------------- */
int
do_eecl (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
	uchar data[HYMOD_EEPROM_SIZE];
	uint offset;
	int rcode = 0;

	switch (argc) {

	case 1:
		offset = HYMOD_EEOFF_MAIN;
		break;

	case 2:
		if (strcmp (argv[1], "main") == 0) {
			offset = HYMOD_EEOFF_MAIN;
			break;
		}
		if (strcmp (argv[1], "mezz") == 0) {
			offset = HYMOD_EEOFF_MEZZ;
			break;
		}
		/* fall through ... */

	default:
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}

	memset (data, 0, HYMOD_EEPROM_SIZE);
	if (i2c_write
		(CFG_I2C_EEPROM_ADDR | offset, 0, CFG_I2C_EEPROM_ADDR_LEN, data,
		 HYMOD_EEPROM_SIZE)) {
		rcode = 1;
	}

	return rcode;
}

#endif							/* CFG_CMD_BSP */

/* ------------------------------------------------------------------------- */