src/mainboard/google/reef/variants/snappy/mainboard.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <string.h>
   4 #include <baseboard/variants.h>
   5 #include <ec/google/chromeec/ec.h>
   6 #include <drivers/vpd/vpd.h>
   7 #include <soc/cpu.h>
   8 #include <soc/intel/apollolake/chip.h>
   9
  10 /* SKU ID enumeration */
  11 enum snappy_sku {
  12         SKU_UNKNOWN = -1,
  13         SKU_RESERVED0,
  14         SKU_RESERVED1,
  15         SKU_BIGDADDY_KBDBKLIGHT,
  16         SKU_RESERVED3,
  17         SKU_RESERVED4,
  18         SKU_BIGDADDY,
  19         SKU_RESERVED6,
  20         SKU_ALAN,
  21         SKU_SNAPPY,
  22 };
  23
  24 void variant_board_ec_set_skuid(void)
  25 {
  26         google_chromeec_set_sku_id(variant_board_sku());
  27 }
  28
  29 /*
  30  * override SKU ID by VPD definition
  31  */
  32 uint8_t variant_board_sku(void)
  33 {
  34         static int board_sku_num = -1;
  35         int vpd_sku_num;
  36         char vpd_skuid[] = "skuid";
  37         char vpd_buffer[4];
  38         int vpd_len;
  39         int i;
  40
  41         if (board_sku_num != -1)
  42                 return board_sku_num;
  43
  44         board_sku_num = sku_strapping_value();
  45
  46         if (!CONFIG(VPD))
  47                 return board_sku_num;
  48
  49         if (!vpd_gets(vpd_skuid, vpd_buffer, ARRAY_SIZE(vpd_buffer), VPD_RO_THEN_RW))
  50                 return board_sku_num;
  51
  52         vpd_len = strlen(vpd_buffer);
  53
  54         vpd_sku_num = 0;
  55         for (i = 0; i < vpd_len; i++) {
  56                 char ch = vpd_buffer[i];
  57                 if ((ch < '0') || (ch > '9')) {
  58                         vpd_sku_num = -1;
  59                         break;
  60                 }
  61                 vpd_sku_num = vpd_sku_num * 10 + (ch - '0');
  62         }
  63
  64         if (vpd_sku_num != -1)
  65                 board_sku_num = vpd_sku_num;
  66
  67         return board_sku_num;
  68 }
  69
  70 void mainboard_devtree_update(struct device *dev)
  71 {
  72         /* Override dev tree settings per board */
  73         struct soc_intel_apollolake_config *cfg = dev->chip_info;
  74         uint8_t sku_id;
  75
  76         sku_id = variant_board_sku();
  77
  78         switch (sku_id) {
  79         case SKU_ALAN:
  80                 cfg->usb2eye[2].Usb20PerPortPeTxiSet = 4;
  81                 cfg->usb2eye[2].Usb20PerPortTxiSet = 4;
  82                 cfg->usb2eye[2].Usb20IUsbTxEmphasisEn = 1;
  83                 cfg->usb2eye[2].Usb20PerPortTxPeHalf = 0;
  84
  85                 cfg->usb2eye[4].Usb20PerPortPeTxiSet = 7;
  86                 cfg->usb2eye[4].Usb20PerPortTxiSet = 7;
  87                 cfg->usb2eye[4].Usb20IUsbTxEmphasisEn = 1;
  88                 cfg->usb2eye[4].Usb20PerPortTxPeHalf = 0;
  89                 break;
  90         case SKU_BIGDADDY_KBDBKLIGHT:
  91         case SKU_BIGDADDY:
  92                 cfg->usb2eye[1].Usb20PerPortPeTxiSet = 7;
  93                 cfg->usb2eye[1].Usb20PerPortTxiSet = 1;
  94                 cfg->usb2eye[1].Usb20IUsbTxEmphasisEn = 3;
  95                 cfg->usb2eye[1].Usb20PerPortTxPeHalf = 0;
  96
  97                 cfg->usb2eye[2].Usb20PerPortPeTxiSet = 4;
  98                 cfg->usb2eye[2].Usb20PerPortTxiSet = 4;
  99                 cfg->usb2eye[2].Usb20IUsbTxEmphasisEn = 1;
 100                 cfg->usb2eye[2].Usb20PerPortTxPeHalf = 0;
 101
 102                 cfg->usb2eye[4].Usb20PerPortPeTxiSet = 7;
 103                 cfg->usb2eye[4].Usb20PerPortTxiSet = 7;
 104                 cfg->usb2eye[4].Usb20IUsbTxEmphasisEn = 1;
 105                 cfg->usb2eye[4].Usb20PerPortTxPeHalf = 0;
 106                 break;
 107         default:
 108                 break;
 109         }
 110 }