262bcc04d4
The SKU ID for Cherry is retrieved via CBI interface. Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com> Change-Id: Icefa016c2e5f68bd194f76d2252856835c65b8e8 Reviewed-on: https://review.coreboot.org/c/coreboot/+/55383 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <assert.h>
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#include <boardid.h>
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#include <console/console.h>
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#include <ec/google/chromeec/ec.h>
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#include <soc/auxadc.h>
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/* board_id is provided by ec/google/chromeec/ec_boardid.c */
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#define ADC_LEVELS 12
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enum {
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/* RAM IDs */
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RAM_ID_LOW_CHANNEL = 2,
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RAM_ID_HIGH_CHANNEL = 3,
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/* SKU IDs */
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SKU_ID_LOW_CHANNEL = 4,
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SKU_ID_HIGH_CHANNEL = 5,
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};
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static const unsigned int ram_voltages[ADC_LEVELS] = {
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/* ID : Voltage (unit: uV) */
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[0] = 74300,
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[1] = 211700,
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[2] = 318800,
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[3] = 428600,
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[4] = 541700,
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[5] = 665800,
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[6] = 781400,
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[7] = 900000,
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[8] = 1023100,
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[9] = 1137000,
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[10] = 1240000,
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[11] = 1342600,
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};
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static const unsigned int *adc_voltages[] = {
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[RAM_ID_LOW_CHANNEL] = ram_voltages,
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[RAM_ID_HIGH_CHANNEL] = ram_voltages,
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[SKU_ID_LOW_CHANNEL] = ram_voltages,
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[SKU_ID_HIGH_CHANNEL] = ram_voltages,
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};
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static uint32_t get_adc_index(unsigned int channel)
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{
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unsigned int value = auxadc_get_voltage_uv(channel);
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assert(channel < ARRAY_SIZE(adc_voltages));
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const unsigned int *voltages = adc_voltages[channel];
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assert(voltages);
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/* Find the closest voltage */
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uint32_t id;
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for (id = 0; id < ADC_LEVELS - 1; id++)
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if (value < (voltages[id] + voltages[id + 1]) / 2)
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break;
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printk(BIOS_DEBUG, "ADC[%u]: Raw value=%u ID=%u\n", channel, value, id);
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return id;
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}
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uint32_t sku_id(void)
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{
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static uint32_t cached_sku_code = BOARD_ID_INIT;
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if (cached_sku_code == BOARD_ID_INIT) {
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cached_sku_code = google_chromeec_get_board_sku();
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if (cached_sku_code == CROS_SKU_UNKNOWN) {
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printk(BIOS_WARNING, "Failed to get SKU code from EC\n");
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cached_sku_code = (get_adc_index(SKU_ID_HIGH_CHANNEL) << 4 |
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get_adc_index(SKU_ID_LOW_CHANNEL));
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}
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printk(BIOS_DEBUG, "SKU Code: %#02x\n", cached_sku_code);
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}
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return cached_sku_code;
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}
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uint32_t ram_code(void)
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{
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static uint32_t cached_ram_code = BOARD_ID_INIT;
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if (cached_ram_code == BOARD_ID_INIT) {
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cached_ram_code = (get_adc_index(RAM_ID_HIGH_CHANNEL) << 4 |
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get_adc_index(RAM_ID_LOW_CHANNEL));
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printk(BIOS_DEBUG, "RAM Code: %#02x\n", cached_ram_code);
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}
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return cached_ram_code;
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}
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