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 /* TODO: Check datasheets if this will work for all ICH* southbridges. */
  22
  23 #include <stdint.h>
  24 #include <smbus.h>
  25 #include <pci.h>
  26 #include <arch/io.h>
  27 #include "i82801bx.h"
  28 #include "i82801_smbus.h"
  29
  30 static int smbus_read_byte(struct bus *bus, device_t dev, u8 address)
  31 {
  32         unsigned device;        /* TODO: u16? */
  33         struct resource *res;
  34
  35         device = dev->path.i2c.device;
  36         res = find_resource(bus->dev, 0x20);
  37
  38         return do_smbus_read_byte(res->base, device, address);
  39 }
  40
  41 static struct smbus_bus_operations lops_smbus_bus = {
  42         .read_byte      = smbus_read_byte,
  43 };
  44
  45 static const struct device_operations smbus_ops = {
  46         .read_resources         = pci_dev_read_resources,
  47         .set_resources          = pci_dev_set_resources,
  48         .enable_resources       = pci_dev_enable_resources,
  49         .init                   = 0,
  50         .scan_bus               = scan_static_bus,
  51         .enable                 = i82801er_enable,
  52         .ops_smbus_bus          = &lops_smbus_bus,
  53 };
  54
  55 /* 82801AA (ICH) */
  56 static const struct pci_driver i82801aa_smb __pci_driver = {
  57         .ops    = &smbus_ops,
  58         .vendor = PCI_VENDOR_ID_INTEL,
  59         .device = PCI_DEVICE_ID_INTEL_82801AA_SMB,
  60 };
  61
  62 /* 82801AB (ICH0) */
  63 static const struct pci_driver i82801ab_smb __pci_driver = {
  64         .ops    = &smbus_ops,
  65         .vendor = PCI_VENDOR_ID_INTEL,
  66         .device = PCI_DEVICE_ID_INTEL_82801AB_SMB,
  67 };
  68
  69 /* 82801BA/BAM (ICH2/ICH2-M) */
  70 static const struct pci_driver i82801ba_smb __pci_driver = {
  71         .ops    = &smbus_ops,
  72         .vendor = PCI_VENDOR_ID_INTEL,
  73         .device = PCI_DEVICE_ID_INTEL_82801BA_SMB,
  74 };
  75
  76 /* 82801CA/CAM (ICH3-S/ICH3-M) */
  77 static const struct pci_driver i82801ca_smb __pci_driver = {
  78         .ops    = &smbus_ops,
  79         .vendor = PCI_VENDOR_ID_INTEL,
  80         .device = PCI_DEVICE_ID_INTEL_82801CA_SMB,
  81 };
  82
  83 /* 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) */
  84 static const struct pci_driver i82801db_smb __pci_driver = {
  85         .ops    = &smbus_ops,
  86         .vendor = PCI_VENDOR_ID_INTEL,
  87         .device = PCI_DEVICE_ID_INTEL_82801DB_SMB,
  88 };
  89
  90 /* 82801EB/ER (ICH5/ICH5R) */
  91 static const struct pci_driver i82801eb_smb __pci_driver = {
  92         .ops    = &smbus_ops,
  93         .vendor = PCI_VENDOR_ID_INTEL,
  94         .device = PCI_DEVICE_ID_INTEL_82801EB_SMB,
  95 };
  96
  97 /* 82801FB/FR/FW/FRW/FBM (ICH6/ICH6R/ICH6W/ICH6RW/ICH6-M) */
  98 static const struct pci_driver i82801fb_smb __pci_driver = {
  99         .ops    = &smbus_ops,
 100         .vendor = PCI_VENDOR_ID_INTEL,
 101         .device = PCI_DEVICE_ID_INTEL_82801FB_SMB,
 102 };
 103
 104 /* 82801E (C-ICH) */
 105 static const struct pci_driver i82801e_smb __pci_driver = {
 106         .ops    = &smbus_ops,
 107         .vendor = PCI_VENDOR_ID_INTEL,
 108         .device = PCI_DEVICE_ID_INTEL_82801E_SMB,
 109 };