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/*
* This file is part of the coreboot project.
*
* Copyright 2016, 2017 Google 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 <string.h>
#include <baseboard/variants.h>
#include <ec/google/chromeec/ec.h>
#include <vendorcode/google/chromeos/cros_vpd.h>
#include <soc/cpu.h>
#include <soc/intel/apollolake/chip.h>
/* SKU ID enumeration */
enum snappy_sku {
SKU_UNKNOWN = -1,
SKU_RESERVED0,
SKU_RESERVED1,
SKU_BIGDADDY_KBDBKLIGHT,
SKU_RESERVED3,
SKU_RESERVED4,
SKU_BIGDADDY,
SKU_RESERVED6,
SKU_ALAN,
SKU_SNAPPY,
};
void variant_board_ec_set_skuid(void)
{
google_chromeec_set_sku_id(variant_board_sku());
}
/*
* override SKU ID by VPD definition
*/
uint8_t variant_board_sku(void)
{
static int board_sku_num = -1;
int vpd_sku_num;
char vpd_skuid[] = "skuid";
char vpd_buffer[4];
int vpd_len;
int i;
if (board_sku_num != -1)
return board_sku_num;
board_sku_num = sku_strapping_value();
if (!IS_ENABLED(CONFIG_CHROMEOS))
return board_sku_num;
if (!cros_vpd_gets(vpd_skuid, vpd_buffer, ARRAY_SIZE(vpd_buffer)))
return board_sku_num;
vpd_len = strlen(vpd_buffer);
vpd_sku_num = 0;
for (i = 0; i < vpd_len; i++) {
char ch = vpd_buffer[i];
if ((ch < '0') || (ch > '9')) {
vpd_sku_num = -1;
break;
} else
vpd_sku_num = vpd_sku_num * 10 + (ch - '0');
}
if (vpd_sku_num != -1)
board_sku_num = vpd_sku_num;
return board_sku_num;
}
void mainboard_devtree_update(struct device *dev)
{
/* Override dev tree settings per board */
struct soc_intel_apollolake_config *cfg = dev->chip_info;
uint8_t sku_id;
sku_id = variant_board_sku();
switch (sku_id) {
case SKU_ALAN:
cfg->usb2eye[2].Usb20PerPortPeTxiSet = 4;
cfg->usb2eye[2].Usb20PerPortTxiSet = 4;
cfg->usb2eye[2].Usb20IUsbTxEmphasisEn = 1;
cfg->usb2eye[2].Usb20PerPortTxPeHalf = 0;
cfg->usb2eye[4].Usb20PerPortPeTxiSet = 7;
cfg->usb2eye[4].Usb20PerPortTxiSet = 7;
cfg->usb2eye[4].Usb20IUsbTxEmphasisEn = 1;
cfg->usb2eye[4].Usb20PerPortTxPeHalf = 0;
break;
case SKU_BIGDADDY_KBDBKLIGHT:
case SKU_BIGDADDY:
cfg->usb2eye[1].Usb20PerPortPeTxiSet = 7;
cfg->usb2eye[1].Usb20PerPortTxiSet = 1;
cfg->usb2eye[1].Usb20IUsbTxEmphasisEn = 3;
cfg->usb2eye[1].Usb20PerPortTxPeHalf = 0;
cfg->usb2eye[2].Usb20PerPortPeTxiSet = 4;
cfg->usb2eye[2].Usb20PerPortTxiSet = 4;
cfg->usb2eye[2].Usb20IUsbTxEmphasisEn = 1;
cfg->usb2eye[2].Usb20PerPortTxPeHalf = 0;
cfg->usb2eye[4].Usb20PerPortPeTxiSet = 7;
cfg->usb2eye[4].Usb20PerPortTxiSet = 7;
cfg->usb2eye[4].Usb20IUsbTxEmphasisEn = 1;
cfg->usb2eye[4].Usb20PerPortTxPeHalf = 0;
break;
default:
break;
}
}
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