util/superiotool/via.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include "superiotool.h"
   4
   5 #define DEVICE_ID_VT82C686_REG  0xe0
   6 #define DEVICE_REV_VT82C686_REG 0xe1
   7
   8 #define DEVICE_ID_VT1211_REG    0x20
   9 #define DEVICE_REV_VT1211_REG   0x21
  10
  11 static const struct superio_registers reg_table[] = {
  12         {0x3c00, "VT82C686A/VT82C686B", {
  13                 {EOT}}},
  14         {0x3c01, "VT1211", {
  15                 {NOLDN, NULL,
  16                         {0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,
  17                          0x2e,0x2f,EOT},
  18                         {0x3c,0x01,0x00,0x11,0x00,0x00,0x00,0x00,0x00,0x00,
  19                          0x00,0x00,EOT}},
  20                 {0x0, "Floppy Disk Controller (FDC)",
  21                         {0x30,0x60,0x61,0x70,0x74,0xf0,0xf1,EOT},
  22                         {0x00,0x03,0xf0,0x06,0x01,0x00,0x00,EOT}},
  23                 {0x1, "Parallel Port (PP)",
  24                         {0x30,0x60,0x61,0x70,0x74,0xf0,EOT},
  25                         {0x03,0x03,0x78,0x05,0x00,0x00,EOT}},
  26                 {0x2, "Serial Port 1 (UART1)",
  27                         {0x30,0x60,0x61,0x70,0xf0,EOT},
  28                         {0x00,0x03,0xf8,0x04,0x00,EOT}},
  29                 {0x3, "Serial Port 2 (UART2)",
  30                         {0x30,0x60,0x61,0x70,0xf0,EOT},
  31                         {0x00,0x02,0xf8,0x03,0x00,EOT}},
  32                 {0x6, "MIDI",
  33                         {0x30,0x60,0x61,0x70,EOT},
  34                         {0x00,0x03,0x30,0x00,EOT}},
  35                 {0x7, "Game Port (GMP)",
  36                         {0x30,0x60,0x61,EOT},
  37                         {0x00,0x02,0x00,EOT}},
  38                 {0x8, "GPIO",
  39                         {0x30,0x60,0x61,0x70,0xf0,0xf1,0xf2,EOT},
  40                         {0x00,0xe9,0x00,0x00,0x00,0x00,0x00,EOT}},
  41                 {0x9, "Watch Dog (WDG)",
  42                         {0x30,0x60,0x61,0x70,0xf0,EOT},
  43                         {0x00,0xea,0x00,0x00,0x00,EOT}},
  44                 {0xa, "Wake-up Control (WUC)",
  45                         {0x30,0x60,0x61,0x70,EOT},
  46                         {0x00,0xeb,0x00,0x00,EOT}},
  47                 {0xb, "Hardware Monitor (HM)",
  48                         {0x30,0x60,0x61,0x70,EOT},
  49                         {0x00,0xec,0x00,0x00,EOT}},
  50                 {0xc, "Very Fast IR (VFIR)",
  51                         {0x30,0x60,0x61,0x70,0x74,0xf0,EOT},
  52                         {0x00,0xe8,0x00,0x00,0x06,0x00,EOT}},
  53                 {0xd, "Flash ROM (ROM)",
  54                         {0x30,0xf0,EOT},
  55                         {0x01,0x00,EOT}},
  56                 {EOT}}},
  57         {EOT}
  58 };
  59
  60 static uint8_t vt82c686_conf = 0;
  61
  62 static int enter_conf_mode_via_vt82c686(void)
  63 {
  64         struct pci_dev *dev;
  65
  66         dev = pci_dev_find(0x1106, 0x0686);
  67         if (!dev) {
  68                 if (verbose)
  69                         printf("  PCI device 1106:0686 not found.\n");
  70                 return 1;
  71         }
  72
  73         vt82c686_conf = pci_read_byte(dev, 0x85);
  74         if (verbose)
  75                 printf("  Super I/O %sabled, Super I/O configuration %sabled\n",
  76                        (vt82c686_conf & (1 << 0)) ? "en" : "dis",
  77                        (vt82c686_conf & (1 << 1)) ? "en" : "dis");
  78
  79         /* If the Super I/O is not enabled, skip it. */
  80         if (!(vt82c686_conf & (1 << 0)))
  81                 return 1;
  82
  83         /* Enable Super I/O configuration mode. */
  84         pci_write_byte(dev, 0x85, vt82c686_conf | (1 << 1));
  85
  86         return 0;
  87 }
  88
  89 static void exit_conf_mode_via_vt82c686(void)
  90 {
  91         struct pci_dev *dev;
  92
  93         dev = pci_dev_find(0x1106, 0x0686);
  94         if (!dev) {
  95                 printf("Bug: PCI device 1106:0686 not found during shutdown.\n"
  96                        "Please report to coreboot@coreboot.org.\n");
  97                 return;
  98         }
  99
 100         /* Restore (disable?) Super I/O configuration mode setting. */
 101         pci_write_byte(dev, 0x85, vt82c686_conf);
 102 }
 103
 104 void probe_idregs_via(uint16_t port)
 105 {
 106         uint16_t id;
 107         uint8_t devid;
 108         uint8_t rev;
 109
 110         if (port == 0x3f0) {
 111                 probing_for("VIA", "(init=vt82c686) ", port);
 112                 if (enter_conf_mode_via_vt82c686())
 113                         return;
 114
 115                 devid = regval(port, DEVICE_ID_VT82C686_REG);
 116                 rev = regval(port, DEVICE_REV_VT82C686_REG);
 117                 id = devid << 8;
 118
 119                 if (superio_unknown(reg_table, id)) {
 120                         if (verbose)
 121                                 printf(NOTFOUND "id=0x%02x, rev=0x%02x\n", devid, rev);
 122                 } else {
 123                         printf("Found VIA %s (id=0x%02x, rev=0x%02x) at 0x%x\n",
 124                                get_superio_name(reg_table, id), devid, rev, port);
 125                         chip_found = 1;
 126                 }
 127                 exit_conf_mode_via_vt82c686();
 128                 if (chip_found)
 129                         return;
 130         } else {
 131                 probing_for("VIA", "(init=0x87,0x87) ", port);
 132                 enter_conf_mode_winbond_fintek_ite_8787(port);
 133
 134                 devid = regval(port, DEVICE_ID_VT1211_REG);
 135                 rev = regval(port, DEVICE_REV_VT1211_REG);
 136                 id = (devid << 8) | 1;
 137
 138                 if (superio_unknown(reg_table, id)) {
 139                         if (verbose)
 140                                 printf(NOTFOUND "id=0x%02x, rev=0x%02x\n", devid, rev);
 141                 } else {
 142                         printf("Found VIA %s (id=0x%02x, rev=0x%02x) at 0x%x\n",
 143                                get_superio_name(reg_table, id), devid, rev, port);
 144                         chip_found = 1;
 145                         dump_superio("VIA", reg_table, port, id, LDN_SEL);
 146                 }
 147         }
 148
 149         exit_conf_mode_winbond_fintek_ite_8787(port);
 150 }
 151
 152 void print_via_chips(void)
 153 {
 154         print_vendor_chips("VIA", reg_table);
 155 }