Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 1 | /* |
Uwe Hermann | c6a1062 | 2010-10-17 19:30:58 +0000 | [diff] [blame] | 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2005 AMD |
| 5 | * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; version 2 of the License. |
| 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. |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 15 | */ |
| 16 | |
stepan | 836ae29 | 2010-12-08 05:42:47 +0000 | [diff] [blame] | 17 | #include "smbus.h" |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 18 | |
| 19 | #define SMBUS_IO_BASE 0x1000 |
| 20 | |
| 21 | static void enable_smbus(void) |
| 22 | { |
| 23 | device_t dev; |
| 24 | dev = pci_locate_device(PCI_ID(0x1166, 0x0205), 0); // 0x0201? |
| 25 | |
| 26 | if (dev == PCI_DEV_INVALID) { |
Stefan Reinauer | 64ed2b7 | 2010-03-31 14:47:43 +0000 | [diff] [blame] | 27 | die("SMBUS controller not found\n"); |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 28 | } |
Stefan Reinauer | 14e2277 | 2010-04-27 06:56:47 +0000 | [diff] [blame] | 29 | |
Stefan Reinauer | 5ab52dd | 2015-01-05 13:01:01 -0800 | [diff] [blame] | 30 | printk(BIOS_DEBUG, "SMBus controller enabled\n"); |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 31 | /* set smbus iobase */ |
| 32 | pci_write_config32(dev, 0x90, SMBUS_IO_BASE | 1); |
Stefan Reinauer | 14e2277 | 2010-04-27 06:56:47 +0000 | [diff] [blame] | 33 | /* Set smbus iospace enable */ |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 34 | pci_write_config8(dev, 0xd2, 0x03); |
| 35 | /* clear any lingering errors, so the transaction will run */ |
| 36 | outb(inb(SMBUS_IO_BASE + SMBHSTSTAT), SMBUS_IO_BASE + SMBHSTSTAT); |
| 37 | } |
| 38 | |
Stefan Reinauer | 467a065 | 2010-04-25 14:37:18 +0000 | [diff] [blame] | 39 | static inline int smbus_recv_byte(unsigned device) |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 40 | { |
| 41 | return do_smbus_recv_byte(SMBUS_IO_BASE, device); |
| 42 | } |
| 43 | |
Stefan Reinauer | 467a065 | 2010-04-25 14:37:18 +0000 | [diff] [blame] | 44 | static inline int smbus_send_byte(unsigned device, unsigned char val) |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 45 | { |
| 46 | return do_smbus_send_byte(SMBUS_IO_BASE, device, val); |
| 47 | } |
| 48 | |
Stefan Reinauer | 467a065 | 2010-04-25 14:37:18 +0000 | [diff] [blame] | 49 | static inline int smbus_read_byte(unsigned device, unsigned address) |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 50 | { |
| 51 | return do_smbus_read_byte(SMBUS_IO_BASE, device, address); |
| 52 | } |
Stefan Reinauer | 467a065 | 2010-04-25 14:37:18 +0000 | [diff] [blame] | 53 | |
| 54 | static inline int smbus_write_byte(unsigned device, unsigned address, unsigned char val) |
Yinghai Lu | afd34e6 | 2006-02-16 17:22:19 +0000 | [diff] [blame] | 55 | { |
| 56 | return do_smbus_write_byte(SMBUS_IO_BASE, device, address, val); |
| 57 | } |