util/inteltool/lpc.c

   1 /* inteltool - dump all registers on an Intel CPU + chipset based system */
   2 /* SPDX-License-Identifier: GPL-2.0-only */
   3
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <inttypes.h>
   7 #include <commonlib/helpers.h>
   8 #include "inteltool.h"
   9
  10 #define SUNRISE_LPC_BC  0xdc
  11
  12 static const io_register_t sunrise_lpc_cfg_registers[] = {
  13         {0x00, 4, "ID"},
  14         {0x04, 2, "CMD"},
  15         {0x06, 2, "STS"},
  16         {0x08, 1, "RID"},
  17         {0x09, 1, "CC[3]"},
  18         {0x0A, 1, "CC[2]"},
  19         {0x0B, 1, "CC[1]"},
  20         {0x0C, 1, "CC[0]"},
  21         {0x0E, 1, "HTYPE"},
  22         {0x2C, 4, "SS"},
  23         {0x34, 1, "CAPP"},
  24         {0x64, 1, "SCNT"},
  25         {0x80, 2, "IOD"},
  26         {0x82, 2, "IOE"},
  27         {0x84, 4, "LGIR1"},
  28         {0x88, 4, "LGIR2"},
  29         {0x8C, 4, "LGIR3"},
  30         {0x90, 4, "LGIR4"},
  31         {0x94, 4, "ULKMC"},
  32         {0x98, 4, "LGMR"},
  33         {0xD0, 2, "FS1"},
  34         {0xD4, 2, "FS2"},
  35         {0xD8, 2, "BDE"},
  36         {0xDC, 1, "BC"},
  37         {0xE0, 4, "PCCTL"},
  38 };
  39
  40 static const io_register_t sunrise_espi_cfg_registers[] = {
  41         {0x00, 4, "ESPI_DID_VID"},
  42         {0x04, 4, "ESPI_STS_CMD"},
  43         {0x08, 4, "ESPI_CC_RID"},
  44         {0x0C, 4, "ESPI_BIST_HTYPE_PLT_CLS"},
  45         {0x2C, 4, "ESPI_SS"},
  46         {0x34, 4, "ESPI_CAPP"},
  47         {0x80, 4, "ESPI_IOD_IOE"},
  48         {0x84, 4, "ESPI_LGIR1"},
  49         {0x88, 4, "ESPI_LGIR2"},
  50         {0x8C, 4, "ESPI_LGIR3"},
  51         {0x90, 4, "ESPI_LGIR4"},
  52         {0x94, 4, "ESPI_ULKMC"},
  53         {0x98, 4, "ESPI_LGMR"},
  54         {0xD0, 4, "ESPI_FS1"},
  55         {0xD4, 4, "ESPI_FS2"},
  56         {0xD8, 4, "ESPI_BDE"},
  57         {0xDC, 4, "ESPI_BC"},
  58 };
  59
  60 int print_lpc(struct pci_dev *sb, struct pci_access *pacc)
  61 {
  62         size_t i, cfg_registers_size = 0;
  63         const io_register_t *cfg_registers;
  64         struct pci_dev *dev = NULL;
  65         uint32_t bc;
  66
  67         printf("\n========== LPC/eSPI =========\n\n");
  68
  69         switch (sb->device_id) {
  70         case PCI_DEVICE_ID_INTEL_H110:
  71         case PCI_DEVICE_ID_INTEL_H170:
  72         case PCI_DEVICE_ID_INTEL_Z170:
  73         case PCI_DEVICE_ID_INTEL_Q170:
  74         case PCI_DEVICE_ID_INTEL_Q150:
  75         case PCI_DEVICE_ID_INTEL_B150:
  76         case PCI_DEVICE_ID_INTEL_C236:
  77         case PCI_DEVICE_ID_INTEL_C232:
  78         case PCI_DEVICE_ID_INTEL_QM170:
  79         case PCI_DEVICE_ID_INTEL_HM170:
  80         case PCI_DEVICE_ID_INTEL_CM236:
  81         case PCI_DEVICE_ID_INTEL_HM175:
  82         case PCI_DEVICE_ID_INTEL_QM175:
  83         case PCI_DEVICE_ID_INTEL_CM238:
  84         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_PRE:
  85         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_U_BASE_SKL:
  86         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_Y_PREM_SKL:
  87         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_U_PREM_SKL:
  88         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_U_BASE_KBL:
  89         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_U_PREM_KBL:
  90         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_Y_PREM_KBL:
  91         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_U_IHDCP_BASE:
  92         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_U_IHDCP_PREM:
  93         case PCI_DEVICE_ID_INTEL_SUNRISEPOINT_LP_Y_IHDCP_PREM:
  94                 dev = pci_get_dev(pacc, sb->domain, sb->bus, sb->dev, 0);
  95                 if (!dev) {
  96                         printf("LPC/eSPI interface not found.\n");
  97                         return 1;
  98                 }
  99                 bc = pci_read_long(dev, SUNRISE_LPC_BC);
 100                 if (bc & (1 << 2)) {
 101                         printf("Device 0:1f.0 is eSPI (BC.LPC_ESPI=1)\n\n");
 102                         cfg_registers = sunrise_espi_cfg_registers;
 103                         cfg_registers_size = ARRAY_SIZE(sunrise_espi_cfg_registers);
 104
 105                 } else {
 106                         printf("Device 0:1f.0 is LPC (BC.LPC_ESPI=0)\n\n");
 107                         cfg_registers = sunrise_lpc_cfg_registers;
 108                         cfg_registers_size = ARRAY_SIZE(sunrise_lpc_cfg_registers);
 109                 }
 110                 break;
 111
 112         default:
 113                 printf("Error: Dumping LPC/eSPI on this southbridge is not (yet) supported.\n");
 114                 return 1;
 115         }
 116
 117         for (i = 0; i < cfg_registers_size; i++) {
 118                 switch (cfg_registers[i].size) {
 119                 case 4:
 120                         printf("0x%04x: 0x%08x (%s)\n",
 121                                 cfg_registers[i].addr,
 122                                 pci_read_long(dev, cfg_registers[i].addr),
 123                                 cfg_registers[i].name);
 124                         break;
 125                 case 2:
 126                         printf("0x%04x: 0x%04x     (%s)\n",
 127                                 cfg_registers[i].addr,
 128                                 pci_read_word(dev, cfg_registers[i].addr),
 129                                 cfg_registers[i].name);
 130                         break;
 131                 case 1:
 132                         printf("0x%04x: 0x%02x       (%s)\n",
 133                                 cfg_registers[i].addr,
 134                                 pci_read_byte(dev, cfg_registers[i].addr),
 135                                 cfg_registers[i].name);
 136                         break;
 137                 default:
 138                         printf("Error: register size %d not implemented.\n",
 139                                 cfg_registers[i].size);
 140                         break;
 141                 }
 142         }
 143
 144         if (dev)
 145                 pci_free_dev(dev);
 146
 147         return 0;
 148 }