util/superiotool/amd.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include "superiotool.h"
   4
   5 #define DEVICE_ID_REG           0x20
   6 #define DEVICE_REV_REG          0x21
   7
   8 static const struct superio_registers reg_table[] = {
   9         {0xb7, "SB7xx", {
  10                 {NOLDN, NULL,
  11                         {0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x28,0x29,0x2a,
  12                          0x2b,0x2c,0x2e, 0x2f, EOT},
  13                          {NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,EOT}},
  14                 {0x3, "EC channel 0",
  15                         {0x30,0x60,0x61, EOT},
  16                          {NANA,NANA,NANA,EOT}},
  17                 {0x5, "Irda",
  18                         {0x30,0x60,0x61,0x70, EOT},
  19                          {NANA,NANA,NANA,NANA,EOT}},
  20                 {0x7, "Keyboard Controller",
  21                         {0x30, EOT},
  22                          {NANA,EOT}},
  23                 {0x9, "Mailbox",
  24                         {0x30,0x60,0x61, EOT},
  25                         {NANA,NANA,NANA,EOT}},
  26                 {EOT}}},
  27         {0xb8, "SB8xx", {
  28                 {NOLDN, NULL,
  29                         {0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x28,0x29,0x2a,
  30                          0x2b,0x2c,0x2e, 0x2f, EOT},
  31                          {NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,NANA,EOT}},
  32                 {0x3, "EC channel 0",
  33                         {0x30,0x60,0x61, EOT},
  34                          {NANA,NANA,NANA,EOT}},
  35                 {0x5, "Irda",
  36                         {0x30,0x60,0x61,0x70, EOT},
  37                          {NANA,NANA,NANA,NANA,EOT}},
  38                 {0x7, "Keyboard Controller",
  39                         {0x30, EOT},
  40                          {NANA,EOT}},
  41                 {0x9, "Mailbox",
  42                         {0x30,0x60,0x61, EOT},
  43                         {NANA,NANA,NANA,EOT}},
  44                 {EOT}}},
  45         {EOT}
  46 };
  47
  48 /* same as serverengines */
  49 static void enter_conf_mode_ec(uint16_t port)
  50 {
  51         OUTB(0x5a, port);
  52 }
  53
  54 static void exit_conf_mode_ec(uint16_t port)
  55 {
  56         OUTB(0xa5, port);
  57 }
  58
  59 uint16_t detect_ec(void)
  60 {
  61         uint16_t ec_port;
  62         struct pci_dev *dev;
  63
  64         dev = pci_dev_find(0x1002, 0x439d);
  65
  66         if (!dev) {
  67                 return 0;
  68         }
  69
  70         /* is EC disabled ? */
  71         if (!(pci_read_byte(dev, 0x40) & (1 << 7)))
  72                 return 0;
  73
  74         ec_port = pci_read_word(dev, 0xa4);
  75
  76         if (!(ec_port & 0x1))
  77                 return 0;
  78
  79         ec_port &= ~0x1;
  80
  81         return ec_port;
  82 }
  83
  84 void probe_idregs_amd(uint16_t port)
  85 {
  86         uint8_t rev, devid;
  87
  88         probing_for("AMD EC", "", port);
  89
  90         if (!(port = detect_ec()))
  91                 return;
  92
  93         enter_conf_mode_ec(port);
  94
  95         devid = regval(port, DEVICE_ID_REG);
  96         rev = regval(port, DEVICE_REV_REG);
  97
  98         if (superio_unknown(reg_table, devid)) {
  99                 if (verbose)
 100                         printf(NOTFOUND "id=0x%02x, rev=0x%02x\n", devid, rev);
 101                 exit_conf_mode_ec(port);
 102                 return;
 103         }
 104
 105         printf("Found AMD EC %s (id=0x%02x, rev=0x%02x) at 0x%x\n",
 106                get_superio_name(reg_table, devid), devid, rev, port);
 107         chip_found = 1;
 108
 109         dump_superio("AMD EC", reg_table, port, devid, LDN_SEL);
 110
 111         exit_conf_mode_ec(port);
 112 }
 113
 114 void print_amd_chips(void)
 115 {
 116         print_vendor_chips("AMD EC", reg_table);
 117 }