diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/kukui/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/mainboard/google/kukui/boardid.c | 68 |
2 files changed, 71 insertions, 0 deletions
diff --git a/src/mainboard/google/kukui/Makefile.inc b/src/mainboard/google/kukui/Makefile.inc index aa6bf11812..a98541a35c 100644 --- a/src/mainboard/google/kukui/Makefile.inc +++ b/src/mainboard/google/kukui/Makefile.inc @@ -1,3 +1,4 @@ +bootblock-y += boardid.c bootblock-y += bootblock.c bootblock-y += chromeos.c bootblock-y += memlayout.ld @@ -6,10 +7,12 @@ decompressor-y += memlayout.ld verstage-y += chromeos.c verstage-y += memlayout.ld +romstage-y += boardid.c romstage-y += chromeos.c romstage-y += memlayout.ld romstage-y += romstage.c +ramstage-y += boardid.c ramstage-y += chromeos.c ramstage-y += mainboard.c ramstage-y += memlayout.ld diff --git a/src/mainboard/google/kukui/boardid.c b/src/mainboard/google/kukui/boardid.c new file mode 100644 index 0000000000..26ae82f3a6 --- /dev/null +++ b/src/mainboard/google/kukui/boardid.c @@ -0,0 +1,68 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2018 MediaTek Inc. + * + * 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 2 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. + */ + +#include <assert.h> +#include <boardid.h> +#include <soc/auxadc.h> +#include <stddef.h> + +static uint32_t get_index(unsigned int channel, uint32_t *cached_id) +{ + static const int voltages[] = { + /* ID : Voltage (unit: uV) */ + /* 0 : */ 74000, + /* 1 : */ 212000, + /* 2 : */ 319000, + /* 3 : */ 429000, + /* 4 : */ 542000, + /* 5 : */ 666000, + /* 6 : */ 781000, + /* 7 : */ 900000, + /* 8 : */ 1023000, + /* 9 : */ 1137000, + /* 10 : */ 1240000, + /* 11 : */ 1343000, + /* 12 : */ 1457000 + }; + + uint32_t id; + + if (*cached_id != BOARD_ID_UNKNOWN) + return *cached_id; + + int value = auxadc_get_voltage(channel); + /* Find the closest voltage */ + for (id = 0; id < ARRAY_SIZE(voltages) - 1; id++) + if (value < (voltages[id] + voltages[id + 1]) / 2) + break; + + const int tolerance = 10000; /* 10,000 uV */ + assert(ABS(value - voltages[id]) < tolerance); + + *cached_id = id; + return id; +} + +uint32_t board_id(void) +{ + static uint32_t cached_board_id = BOARD_ID_UNKNOWN; + return get_index(4, &cached_board_id); +} + +uint32_t ram_code(void) +{ + static uint32_t cached_ram_code = BOARD_ID_UNKNOWN; + return get_index(3, &cached_ram_code); +} |