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venice: display DRAM MR registers and decoding if debug enabled

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While this is interesting and useful for debugging there isn't extremely
useful information so we will only show it if debug is enabled.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey
2025-07-14 10:23:04 -07:00
committed by Fabio Estevam
parent 2c692bff83
commit 6dc91a8408
1 changed files with 59 additions and 1 deletions
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60
board/gateworks/venice/spl.c
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@@ -271,7 +271,65 @@ void board_init_f(ulong dummy)
dram_timing->fsp_msg[0].drate,
dram_timing->fsp_msg[0].drate / 2,
dram_desc[0] ? dram_desc : "");
puts("\n");
#ifdef DEBUG
u8 mr[9] = { 0 };
/* Read MR5-MR8 to obtain details about DRAM part (and verify DRAM working) */
for (i = 5; i < 9; i++)
mr[i] = lpddr4_mr_read(0xf, i) & 0xff;
printf(" (0x%02x%02x%02x%02x", mr[5], mr[6], mr[7], mr[8]);
/* MR5 MFG_ID */
switch (mr[5]) {
case 0xff:
printf(" Micron");
break;
default:
break;
}
/* MR8 OP[7:6] Width */
i = 0;
switch ((mr[8] >> 6) & 0x3) {
case 0:
i = 16;
break;
case 1:
i = 8;
break;
}
if (i)
printf(" x%d", i);
/* MR8 OP[5:2] Density */
i = 0;
switch ((mr[8] >> 2) & 0xf) {
case 0:
i = 4;
break;
case 1:
i = 6;
break;
case 2:
i = 8;
break;
case 3:
i = 12;
break;
case 4:
i = 16;
break;
case 5:
i = 24;
break;
case 6:
i = 32;
break;
default:
break;
}
if (i)
printf(" %dGb per die", i);
#endif
puts(")\n");
} else {
hang();
}