litex/software/libbase/board.c

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#include <hw/csr.h>
#include <stdio.h>
#include <stdlib.h>
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#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
},
};
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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;
}
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static const struct board_desc *get_board_desc(void)
{
return get_board_desc_id(identifier_sysid_read());
}
int get_pcb_revision(void)
{
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/* TODO
int r;
unsigned int io;
r = 0;
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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;
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return r;*/
return 0;
}
void get_soc_version(unsigned int *major, unsigned int *minor, unsigned int *subminor, unsigned int *rc)
{
unsigned int id;
id = identifier_version_read();
*major = (id & 0xf000) >> 12;
*minor = (id & 0x0f00) >> 8;
*subminor = (id & 0x00f0) >> 4;
*rc = id & 0x000f;
}
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);
}
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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);
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printf("Detected SoC %s at %dMHz on %s (PCB revision %d)\n", soc_version, identifier_frequency_read()/1000000,
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brd_desc->name, rev);
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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");
}