drivers/fpga/fpga.c

/*
 * (C) Copyright 2002
 * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
 *
 * 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
 *
 */

/* Generic FPGA support */
#include <common.h>             /* core U-Boot definitions */
#include <xilinx.h>             /* xilinx specific definitions */
#include <altera.h>             /* altera specific definitions */
#include <lattice.h>

/* Local definitions */
#ifndef CONFIG_MAX_FPGA_DEVICES
#define CONFIG_MAX_FPGA_DEVICES		5
#endif

/* Local static data */
static int next_desc = FPGA_INVALID_DEVICE;
static fpga_desc desc_table[CONFIG_MAX_FPGA_DEVICES];

/*
 * fpga_no_sup
 * 'no support' message function
 */
static void fpga_no_sup(char *fn, char *msg)
{
	if (fn && msg)
		printf("%s: No support for %s.\n", fn, msg);
	else if (msg)
		printf("No support for %s.\n", msg);
	else
		printf("No FPGA suport!\n");
}


/* fpga_get_desc
 *	map a device number to a descriptor
 */
static const fpga_desc *const fpga_get_desc(int devnum)
{
	fpga_desc *desc = (fpga_desc *)NULL;

	if ((devnum >= 0) && (devnum < next_desc)) {
		desc = &desc_table[devnum];
		debug("%s: found fpga descriptor #%d @ 0x%p\n",
		      __func__, devnum, desc);
	}

	return desc;
}

/*
 * fpga_validate
 *	generic parameter checking code
 */
static const fpga_desc *const fpga_validate(int devnum, const void *buf,
					 size_t bsize, char *fn)
{
	const fpga_desc *desc = fpga_get_desc(devnum);

	if (!desc)
		printf("%s: Invalid device number %d\n", fn, devnum);

	if (!buf) {
		printf("%s: Null buffer.\n", fn);
		return (fpga_desc * const)NULL;
	}
	return desc;
}

/*
 * fpga_dev_info
 *	generic multiplexing code
 */
static int fpga_dev_info(int devnum)
{
	int ret_val = FPGA_FAIL; /* assume failure */
	const fpga_desc * const desc = fpga_get_desc(devnum);

	if (desc) {
		debug("%s: Device Descriptor @ 0x%p\n",
		      __func__, desc->devdesc);

		switch (desc->devtype) {
		case fpga_xilinx:
#if defined(CONFIG_FPGA_XILINX)
			printf("Xilinx Device\nDescriptor @ 0x%p\n", desc);
			ret_val = xilinx_info(desc->devdesc);
#else
			fpga_no_sup((char *)__func__, "Xilinx devices");
#endif
			break;
		case fpga_altera:
#if defined(CONFIG_FPGA_ALTERA)
			printf("Altera Device\nDescriptor @ 0x%p\n", desc);
			ret_val = altera_info(desc->devdesc);
#else
			fpga_no_sup((char *)__func__, "Altera devices");
#endif
			break;
		case fpga_lattice:
#if defined(CONFIG_FPGA_LATTICE)
			printf("Lattice Device\nDescriptor @ 0x%p\n", desc);
			ret_val = lattice_info(desc->devdesc);
#else
			fpga_no_sup((char *)__func__, "Lattice devices");
#endif
			break;
		default:
			printf("%s: Invalid or unsupported device type %d\n",
			       __func__, desc->devtype);
		}
	} else {
		printf("%s: Invalid device number %d\n", __func__, devnum);
	}

	return ret_val;
}

/*
 * fgpa_init is usually called from misc_init_r() and MUST be called
 * before any of the other fpga functions are used.
 */
void fpga_init(void)
{
	next_desc = 0;
	memset(desc_table, 0, sizeof(desc_table));

	debug("%s\n", __func__);
}

/*
 * fpga_count
 * Basic interface function to get the current number of devices available.
 */
int fpga_count(void)
{
	return next_desc;
}

/*
 * fpga_add
 *	Add the device descriptor to the device table.
 */
int fpga_add(fpga_type devtype, void *desc)
{
	int devnum = FPGA_INVALID_DEVICE;

	if (next_desc < 0) {
		printf("%s: FPGA support not initialized!\n", __func__);
	} else if ((devtype > fpga_min_type) && (devtype < fpga_undefined)) {
		if (desc) {
			if (next_desc < CONFIG_MAX_FPGA_DEVICES) {
				devnum = next_desc;
				desc_table[next_desc].devtype = devtype;
				desc_table[next_desc++].devdesc = desc;
			} else {
				printf("%s: Exceeded Max FPGA device count\n",
				       __func__);
			}
		} else {
			printf("%s: NULL device descriptor\n", __func__);
		}
	} else {
		printf("%s: Unsupported FPGA type %d\n", __func__, devtype);
	}

	return devnum;
}

/*
 * Convert bitstream data and load into the fpga
 */
int __weak fpga_loadbitstream(unsigned long dev, char *fpgadata, size_t size)
{
	printf("Bitstream support not implemented for this FPGA device\n");
	return FPGA_FAIL;
}

/*
 * Generic multiplexing code
 */
int fpga_load(int devnum, const void *buf, size_t bsize)
{
	int ret_val = FPGA_FAIL;           /* assume failure */
	const fpga_desc *desc = fpga_validate(devnum, buf, bsize,
					      (char *)__func__);

	if (desc) {
		switch (desc->devtype) {
		case fpga_xilinx:
#if defined(CONFIG_FPGA_XILINX)
			ret_val = xilinx_load(desc->devdesc, buf, bsize);
#else
			fpga_no_sup((char *)__func__, "Xilinx devices");
#endif
			break;
		case fpga_altera:
#if defined(CONFIG_FPGA_ALTERA)
			ret_val = altera_load(desc->devdesc, buf, bsize);
#else
			fpga_no_sup((char *)__func__, "Altera devices");
#endif
			break;
		case fpga_lattice:
#if defined(CONFIG_FPGA_LATTICE)
			ret_val = lattice_load(desc->devdesc, buf, bsize);
#else
			fpga_no_sup((char *)__func__, "Lattice devices");
#endif
			break;
		default:
			printf("%s: Invalid or unsupported device type %d\n",
			       __func__, desc->devtype);
		}
	}

	return ret_val;
}

/*
 * fpga_dump
 *	generic multiplexing code
 */
int fpga_dump(int devnum, const void *buf, size_t bsize)
{
	int ret_val = FPGA_FAIL;           /* assume failure */
	const fpga_desc *desc = fpga_validate(devnum, buf, bsize,
					      (char *)__func__);

	if (desc) {
		switch (desc->devtype) {
		case fpga_xilinx:
#if defined(CONFIG_FPGA_XILINX)
			ret_val = xilinx_dump(desc->devdesc, buf, bsize);
#else
			fpga_no_sup((char *)__func__, "Xilinx devices");
#endif
			break;
		case fpga_altera:
#if defined(CONFIG_FPGA_ALTERA)
			ret_val = altera_dump(desc->devdesc, buf, bsize);
#else
			fpga_no_sup((char *)__func__, "Altera devices");
#endif
			break;
		case fpga_lattice:
#if defined(CONFIG_FPGA_LATTICE)
			ret_val = lattice_dump(desc->devdesc, buf, bsize);
#else
			fpga_no_sup((char *)__func__, "Lattice devices");
#endif
			break;
		default:
			printf("%s: Invalid or unsupported device type %d\n",
			       __func__, desc->devtype);
		}
	}

	return ret_val;
}

/*
 * fpga_info
 *	front end to fpga_dev_info.  If devnum is invalid, report on all
 *	available devices.
 */
int fpga_info(int devnum)
{
	if (devnum == FPGA_INVALID_DEVICE) {
		if (next_desc > 0) {
			int dev;

			for (dev = 0; dev < next_desc; dev++)
				fpga_dev_info(dev);

			return FPGA_SUCCESS;
		} else {
			printf("%s: No FPGA devices available.\n", __func__);
			return FPGA_FAIL;
		}
	}

	return fpga_dev_info(devnum);
}