src/southbridge/intel/i82801bx/i82801bx_smbus.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2005 Yinghai Lu <yinghailu@gmail.com>
   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.
  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
  21 #include <stdint.h>
  22 #include <device/smbus.h>
  23 #include <device/pci.h>
  24 #include <device/pci_ids.h>
  25 #include <arch/io.h>
  26 #include "i82801bx.h"
  27 #include "i82801bx_smbus.h"
  28
  29 static int lsmbus_read_byte(device_t dev, u8 address)
  30 {
  31         u16 device;
  32         struct resource *res;
  33         struct bus *pbus;
  34
  35         device = dev->path.i2c.device;
  36         pbus = get_pbus_smbus(dev);
  37         res = find_resource(pbus->dev, 0x20);
  38
  39         return do_smbus_read_byte(res->base, device, address);
  40 }
  41
  42 static struct smbus_bus_operations lops_smbus_bus = {
  43         .read_byte      = lsmbus_read_byte,
  44 };
  45
  46 static const struct device_operations smbus_ops = {
  47         .read_resources         = pci_dev_read_resources,
  48         .set_resources          = pci_dev_set_resources,
  49         .enable_resources       = pci_dev_enable_resources,
  50         .init                   = 0,
  51         .scan_bus               = scan_static_bus,
  52         .enable                 = i82801bx_enable,
  53         .ops_smbus_bus          = &lops_smbus_bus,
  54 };
  55
  56 /* 82801AA (ICH) */
  57 static const struct pci_driver i82801aa_smb __pci_driver = {
  58         .ops    = &smbus_ops,
  59         .vendor = PCI_VENDOR_ID_INTEL,
  60         .device = PCI_DEVICE_ID_INTEL_82801AA_SMB,
  61 };
  62
  63 /* 82801AB (ICH0) */
  64 static const struct pci_driver i82801ab_smb __pci_driver = {
  65         .ops    = &smbus_ops,
  66         .vendor = PCI_VENDOR_ID_INTEL,
  67         .device = PCI_DEVICE_ID_INTEL_82801AB_SMB,
  68 };
  69
  70 /* 82801BA/BAM (ICH2/ICH2-M) */
  71 static const struct pci_driver i82801ba_smb __pci_driver = {
  72         .ops    = &smbus_ops,
  73         .vendor = PCI_VENDOR_ID_INTEL,
  74         .device = PCI_DEVICE_ID_INTEL_82801BA_SMB,
  75 };
  76
  77 /* 82801CA/CAM (ICH3-S/ICH3-M) */
  78 static const struct pci_driver i82801ca_smb __pci_driver = {
  79         .ops    = &smbus_ops,
  80         .vendor = PCI_VENDOR_ID_INTEL,
  81         .device = PCI_DEVICE_ID_INTEL_82801CA_SMB,
  82 };
  83
  84 /* 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) */
  85 static const struct pci_driver i82801db_smb __pci_driver = {
  86         .ops    = &smbus_ops,
  87         .vendor = PCI_VENDOR_ID_INTEL,
  88         .device = PCI_DEVICE_ID_INTEL_82801DB_SMB,
  89 };
  90
  91 /* 82801EB/ER (ICH5/ICH5R) */
  92 static const struct pci_driver i82801eb_smb __pci_driver = {
  93         .ops    = &smbus_ops,
  94         .vendor = PCI_VENDOR_ID_INTEL,
  95         .device = PCI_DEVICE_ID_INTEL_82801EB_SMB,
  96 };
  97
  98 /* 82801FB/FR/FW/FRW/FBM (ICH6/ICH6R/ICH6W/ICH6RW/ICH6-M) */
  99 static const struct pci_driver i82801fb_smb __pci_driver = {
 100         .ops    = &smbus_ops,
 101         .vendor = PCI_VENDOR_ID_INTEL,
 102         .device = PCI_DEVICE_ID_INTEL_82801FB_SMB,
 103 };
 104
 105 /* 82801E (C-ICH) */
 106 static const struct pci_driver i82801e_smb __pci_driver = {
 107         .ops    = &smbus_ops,
 108         .vendor = PCI_VENDOR_ID_INTEL,
 109         .device = PCI_DEVICE_ID_INTEL_82801E_SMB,
 110 };