Uwe Hermann | 622fb79 | 2010-01-24 01:47:58 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the superiotool project. |
| 3 | * |
| 4 | * Copyright (C) 2009 Carl-Daniel Hailfinger |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
Uwe Hermann | 622fb79 | 2010-01-24 01:47:58 +0000 | [diff] [blame] | 15 | */ |
| 16 | |
| 17 | #include "superiotool.h" |
| 18 | |
| 19 | #define DEVICE_ID_VT82C686_REG 0xe0 |
| 20 | #define DEVICE_REV_VT82C686_REG 0xe1 |
| 21 | |
| 22 | static const struct superio_registers reg_table[] = { |
| 23 | {0x3c, "VT82C686A/VT82C686B", { |
| 24 | {EOT}}}, |
| 25 | {EOT} |
| 26 | }; |
| 27 | |
| 28 | static uint8_t vt82c686_conf = 0; |
| 29 | |
| 30 | static int enter_conf_mode_via_vt82c686(void) |
| 31 | { |
| 32 | struct pci_dev *dev; |
| 33 | |
| 34 | dev = pci_dev_find(0x1106, 0x0686); |
| 35 | if (!dev) { |
| 36 | if (verbose) |
| 37 | printf(" PCI device 1106:0686 not found.\n"); |
| 38 | return 1; |
| 39 | } |
| 40 | |
| 41 | vt82c686_conf = pci_read_byte(dev, 0x85); |
| 42 | if (verbose) |
| 43 | printf(" Super I/O %sabled, Super I/O configuration %sabled\n", |
| 44 | (vt82c686_conf & (1 << 0)) ? "en" : "dis", |
| 45 | (vt82c686_conf & (1 << 1)) ? "en" : "dis"); |
| 46 | |
| 47 | /* If the Super I/O is not enabled, skip it. */ |
| 48 | if (!(vt82c686_conf & (1 << 0))) |
| 49 | return 1; |
| 50 | |
| 51 | /* Enable Super I/O configuration mode. */ |
| 52 | pci_write_byte(dev, 0x85, vt82c686_conf | (1 << 1)); |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static void exit_conf_mode_via_vt82c686(void) |
| 58 | { |
| 59 | struct pci_dev *dev; |
| 60 | |
| 61 | dev = pci_dev_find(0x1106, 0x0686); |
| 62 | if (!dev) { |
| 63 | printf("Bug: PCI device 1106:0686 not found during shutdown.\n" |
| 64 | "Please report to coreboot@coreboot.org.\n"); |
| 65 | return; |
| 66 | } |
| 67 | |
| 68 | /* Restore (disable?) Super I/O configuration mode setting. */ |
| 69 | pci_write_byte(dev, 0x85, vt82c686_conf); |
| 70 | } |
| 71 | |
| 72 | void probe_idregs_via(uint16_t port) |
| 73 | { |
| 74 | uint16_t id; |
| 75 | uint8_t rev; |
| 76 | |
| 77 | probing_for("VIA", "", port); |
| 78 | |
| 79 | if (enter_conf_mode_via_vt82c686()) |
| 80 | return; |
| 81 | |
| 82 | id = regval(port, DEVICE_ID_VT82C686_REG); |
| 83 | rev = regval(port, DEVICE_REV_VT82C686_REG); |
| 84 | |
| 85 | if (superio_unknown(reg_table, id)) { |
| 86 | if (verbose) |
| 87 | printf(NOTFOUND "id=0x%04x, rev=0x%02x\n", id, rev); |
| 88 | exit_conf_mode_via_vt82c686(); |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | printf("Found VIA %s (id=0x%04x, rev=0x%02x) at 0x%x\n", |
| 93 | get_superio_name(reg_table, id), id, rev, port); |
| 94 | chip_found = 1; |
| 95 | |
| 96 | exit_conf_mode_via_vt82c686(); |
| 97 | } |
| 98 | |
| 99 | void print_via_chips(void) |
| 100 | { |
| 101 | print_vendor_chips("VIA", reg_table); |
| 102 | } |