117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/*
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* Milkymist SoC (Software)
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* Copyright (C) 2007, 2008, 2009, 2011, 2012 Sebastien Bourdeauducq
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <hw/id.h>
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#include <hw/gpio.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <version.h>
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#include <timer.h>
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#include <board.h>
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static const struct board_desc boards[1] = {
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{
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.id = 0x4D31, /* M1 */
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.name = "Milkymist One",
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.ethernet_phyadr = 1
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},
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};
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static const struct board_desc *get_board_desc_id(unsigned short int id)
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{
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unsigned int i;
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for(i=0;i<sizeof(boards)/sizeof(boards[0]);i++)
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if(boards[i].id == id)
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return &boards[i];
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return NULL;
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}
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static const struct board_desc *get_board_desc(void)
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{
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return get_board_desc_id((CSR_ID_SYSTEMH << 8) | CSR_ID_SYSTEML);
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}
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int get_pcb_revision(void)
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{
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/* TODO
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int r;
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unsigned int io;
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r = 0;
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io = CSR_GPIO_IN;
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if(io & GPIO_PCBREV0)
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r |= 0x1;
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if(io & GPIO_PCBREV1)
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r |= 0x2;
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if(io & GPIO_PCBREV2)
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r |= 0x4;
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if(io & GPIO_PCBREV3)
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r |= 0x8;
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return r;*/
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return 0;
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}
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void get_soc_version(unsigned int *major, unsigned int *minor, unsigned int *subminor, unsigned int *rc)
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{
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unsigned int id;
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id = CSR_ID_VERSIONH;
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*major = (id & 0xf0) >> 4;
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*minor = id & 0x0f;
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id = CSR_ID_VERSIONL;
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*subminor = (id & 0xf0) >> 4;
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*rc = id & 0x0f;
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}
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void get_soc_version_formatted(char *version)
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{
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unsigned int major, minor, subminor, rc;
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get_soc_version(&major, &minor, &subminor, &rc);
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version += sprintf(version, "%u.%u", major, minor);
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if(subminor != 0)
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version += sprintf(version, ".%u", subminor);
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if(rc != 0)
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sprintf(version, "RC%u", rc);
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}
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const struct board_desc *brd_desc;
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void board_init(void)
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{
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int rev;
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char soc_version[13];
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brd_desc = get_board_desc();
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if(brd_desc == NULL) {
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printf("Running on unknown board, startup aborted.\n");
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while(1);
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}
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rev = get_pcb_revision();
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get_soc_version_formatted(soc_version);
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printf("Detected SoC %s at %dMHz on %s (PCB revision %d)\n", soc_version, get_system_frequency()/1000000,
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brd_desc->name, rev);
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if(strcmp(soc_version, VERSION) != 0)
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printf("SoC and BIOS versions do not match!\n");
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if(rev > 2)
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printf("Unsupported PCB revision, please upgrade!\n");
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}
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