util/superiotool/exar.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include "superiotool.h"
   4
   5 #define DEVICE_ID_BYTE1_REG     0x20
   6 #define DEVICE_ID_BYTE2_REG     0x21
   7
   8 #define VENDOR_ID_BYTE1_REG     0x23
   9 #define VENDOR_ID_BYTE2_REG     0x24
  10
  11 #define EXAR_VENDOR_ID          0xa813
  12
  13 static const struct superio_registers reg_table[] = {
  14         {0x8403, "XR28V384", {
  15                 /* We assume reserved bits are read as 0. */
  16                 {NOLDN, NULL,
  17                         {0x02,0x07,0x20,0x21,0x23,0x24,0x25,0x26,0x27,EOT},
  18                         {0x00,0x00,0x03,0x84,0x13,0xa8,0x00,0x00,0x00,EOT}},
  19                 {0x0, "COM1",
  20                         {0x30,0x60,0x61,0x70,0xf0,0xf1,0xf4,0xf5,0xf6,EOT},
  21                         {0x01,0x03,0xf8,0x03,0x00,0x44,0x00,0x00,0x00,EOT}},
  22                 {0x1, "COM2",
  23                         {0x30,0x60,0x61,0x70,0xf0,0xf4,0xf5,0xf6,EOT},
  24                         {0x01,0x02,0xf8,0x04,0x00,0x00,0x00,0x00,EOT}},
  25                 {0x2, "COM3",
  26                         {0x30,0x60,0x61,0x70,0xf0,0xf4,0xf5,0xf6,EOT},
  27                         {0x01,0x03,0xe8,0x05,0x00,0x00,0x00,0x00,EOT}},
  28                 {0x3, "COM4",
  29                         {0x30,0x60,0x61,0x70,0xf0,0xf4,0xf5,0xf6,EOT},
  30                         {0x01,0x02,0xe8,0x09,0x00,0x00,0x00,0x00,EOT}},
  31                 {0x8, "WDT",
  32                         {0x30,0x60,0x61,0x70,0xf0,0xf1,EOT},
  33                         {0x01,0x04,0x42,0x00,0x02,0x0a,EOT}},
  34                 {EOT}}},
  35         {EOT}
  36 };
  37
  38 void enter_conf_mode_exar(uint16_t port)
  39 {
  40         OUTB(0x67, port);
  41         OUTB(0x67, port);
  42 }
  43
  44 void exit_conf_mode_exar(uint16_t port)
  45 {
  46         OUTB(0xaa, port);
  47 }
  48
  49 void probe_idregs_exar(uint16_t port)
  50 {
  51         uint16_t vid, did;
  52
  53         probing_for("Exar", "", port);
  54
  55         enter_conf_mode_exar(port);
  56
  57         did = regval(port, DEVICE_ID_BYTE1_REG);
  58         did |= (regval(port, DEVICE_ID_BYTE2_REG) << 8);
  59
  60         vid = regval(port, VENDOR_ID_BYTE1_REG);
  61         vid |= (regval(port, VENDOR_ID_BYTE2_REG) << 8);
  62
  63         if (vid != EXAR_VENDOR_ID || superio_unknown(reg_table, did)) {
  64                 if (verbose)
  65                         printf(NOTFOUND "vid=0x%04x, id=0x%04x\n", vid, did);
  66                 exit_conf_mode_exar(port);
  67                 return;
  68         }
  69
  70         printf("Found Exar %s (vid=0x%04x, id=0x%04x) at 0x%x\n",
  71                 get_superio_name(reg_table, did), vid, did, port);
  72         chip_found = 1;
  73
  74         dump_superio("Exar", reg_table, port, did, LDN_SEL);
  75
  76         exit_conf_mode_exar(port);
  77 }
  78
  79 void print_exar_chips(void)
  80 {
  81         print_vendor_chips("Exar", reg_table);
  82 }