litex/software/libbase/board.c

115 lines
2.6 KiB
C

/*
* Milkymist SoC (Software)
* Copyright (C) 2007, 2008, 2009, 2011, 2012 Sebastien Bourdeauducq
*
* 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, version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <hw/id.h>
#include <hw/gpio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <version.h>
#include <board.h>
static const struct board_desc boards[1] = {
{
.id = 0x4D31, /* M1 */
.name = "Milkymist One",
.ethernet_phyadr = 1
},
};
static const struct board_desc *get_board_desc_id(unsigned short int id)
{
unsigned int i;
for(i=0;i<sizeof(boards)/sizeof(boards[0]);i++)
if(boards[i].id == id)
return &boards[i];
return NULL;
}
static const struct board_desc *get_board_desc(void)
{
return get_board_desc_id((CSR_ID_SYSTEMH << 8) | CSR_ID_SYSTEML);
}
int get_pcb_revision(void)
{
/* TODO
int r;
unsigned int io;
r = 0;
io = CSR_GPIO_IN;
if(io & GPIO_PCBREV0)
r |= 0x1;
if(io & GPIO_PCBREV1)
r |= 0x2;
if(io & GPIO_PCBREV2)
r |= 0x4;
if(io & GPIO_PCBREV3)
r |= 0x8;
return r;*/
return 0;
}
void get_soc_version(unsigned int *major, unsigned int *minor, unsigned int *subminor, unsigned int *rc)
{
unsigned int id;
id = CSR_ID_VERSIONH;
*major = (id & 0xf0) >> 4;
*minor = id & 0x0f;
id = CSR_ID_VERSIONL;
*subminor = (id & 0xf0) >> 4;
*rc = id & 0x0f;
}
void get_soc_version_formatted(char *version)
{
unsigned int major, minor, subminor, rc;
get_soc_version(&major, &minor, &subminor, &rc);
version += sprintf(version, "%u.%u", major, minor);
if(subminor != 0)
version += sprintf(version, ".%u", subminor);
if(rc != 0)
sprintf(version, "RC%u", rc);
}
const struct board_desc *brd_desc;
void board_init(void)
{
int rev;
char soc_version[13];
brd_desc = get_board_desc();
if(brd_desc == NULL) {
printf("Running on unknown board, startup aborted.\n");
while(1);
}
rev = get_pcb_revision();
get_soc_version_formatted(soc_version);
printf("Detected SoC %s on %s (PCB revision %d)\n", soc_version, brd_desc->name, rev);
if(strcmp(soc_version, VERSION) != 0)
printf("SoC and BIOS versions do not match!\n");
if(rev > 2)
printf("Unsupported PCB revision, please upgrade!\n");
}