Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 4 | * Copyright (C) 2008-2009 coresystems GmbH |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 5 | * |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation; version 2 of |
| 9 | * the License. |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 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. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 21 | #include <console/console.h> |
| 22 | #include <device/device.h> |
| 23 | #include <device/path.h> |
| 24 | #include <device/smbus.h> |
| 25 | #include <device/pci.h> |
| 26 | #include <device/pci_ids.h> |
| 27 | #include <device/pci_ops.h> |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 28 | #include <arch/io.h> |
| 29 | #include "i82801gx.h" |
stepan | 836ae29 | 2010-12-08 05:42:47 +0000 | [diff] [blame^] | 30 | #include "smbus.h" |
Stefan Reinauer | 109ab31 | 2009-08-12 16:08:05 +0000 | [diff] [blame] | 31 | |
Stefan Reinauer | 573f7d4 | 2009-07-21 21:50:34 +0000 | [diff] [blame] | 32 | #define SMB_BASE 0x20 |
| 33 | static void smbus_init(struct device *dev) |
| 34 | { |
| 35 | u32 smb_base; |
| 36 | |
| 37 | smb_base = pci_read_config32(dev, SMB_BASE); |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 38 | printk(BIOS_DEBUG, "Initializing SMBus device:\n"); |
| 39 | printk(BIOS_DEBUG, " Old SMBUS Base Address: 0x%04x\n", smb_base); |
Stefan Reinauer | 573f7d4 | 2009-07-21 21:50:34 +0000 | [diff] [blame] | 40 | pci_write_config32(dev, SMB_BASE, 0x00000401); |
| 41 | smb_base = pci_read_config32(dev, SMB_BASE); |
Stefan Reinauer | c02b4fc | 2010-03-22 11:42:32 +0000 | [diff] [blame] | 42 | printk(BIOS_DEBUG, " New SMBUS Base Address: 0x%04x\n", smb_base); |
Stefan Reinauer | 573f7d4 | 2009-07-21 21:50:34 +0000 | [diff] [blame] | 43 | } |
| 44 | |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 45 | static int lsmbus_read_byte(device_t dev, u8 address) |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 46 | { |
| 47 | u16 device; |
| 48 | struct resource *res; |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 49 | struct bus *pbus; |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 50 | |
Stefan Reinauer | 2b34db8 | 2009-02-28 20:10:20 +0000 | [diff] [blame] | 51 | device = dev->path.i2c.device; |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 52 | pbus = get_pbus_smbus(dev); |
| 53 | res = find_resource(pbus->dev, 0x20); |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 54 | |
| 55 | return do_smbus_read_byte(res->base, device, address); |
| 56 | } |
| 57 | |
| 58 | static struct smbus_bus_operations lops_smbus_bus = { |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 59 | .read_byte = lsmbus_read_byte, |
| 60 | }; |
| 61 | |
| 62 | static void smbus_set_subsystem(device_t dev, unsigned vendor, unsigned device) |
| 63 | { |
| 64 | if (!vendor || !device) { |
| 65 | pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
| 66 | pci_read_config32(dev, PCI_VENDOR_ID)); |
| 67 | } else { |
| 68 | pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
| 69 | ((device & 0xffff) << 16) | (vendor & 0xffff)); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | static struct pci_operations smbus_pci_ops = { |
| 74 | .set_subsystem = smbus_set_subsystem, |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 75 | }; |
| 76 | |
| 77 | static struct device_operations smbus_ops = { |
| 78 | .read_resources = pci_dev_read_resources, |
| 79 | .set_resources = pci_dev_set_resources, |
| 80 | .enable_resources = pci_dev_enable_resources, |
Stefan Reinauer | 573f7d4 | 2009-07-21 21:50:34 +0000 | [diff] [blame] | 81 | .init = smbus_init, |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 82 | .scan_bus = scan_static_bus, |
| 83 | .enable = i82801gx_enable, |
| 84 | .ops_smbus_bus = &lops_smbus_bus, |
Stefan Reinauer | a8e1168 | 2009-03-11 14:54:18 +0000 | [diff] [blame] | 85 | .ops_pci = &smbus_pci_ops, |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 86 | }; |
| 87 | |
| 88 | /* 82801GB/GR/GDH/GBM/GHM/GU (ICH7/ICH7R/ICH7DH/ICH7-M/ICH7-M DH/ICH7-U) */ |
| 89 | static const struct pci_driver i82801gx_smbus __pci_driver = { |
| 90 | .ops = &smbus_ops, |
| 91 | .vendor = PCI_VENDOR_ID_INTEL, |
Uwe Hermann | 5d7a1c8 | 2008-10-31 18:41:09 +0000 | [diff] [blame] | 92 | .device = 0x27da, |
Stefan Reinauer | debb11f | 2008-10-29 04:46:52 +0000 | [diff] [blame] | 93 | }; |