src/southbridge/nvidia/mcp55/smbus.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2004 Tyan Computer
   5  * Written by Yinghai Lu <yhlu@tyan.com> for Tyan Computer.
   6  * Copyright (C) 2006,2007 AMD
   7  * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  */
  19
  20 #include <console/console.h>
  21 #include <device/device.h>
  22 #include <device/pci.h>
  23 #include <device/pci_ids.h>
  24 #include <device/pci_ops.h>
  25 #include <device/smbus.h>
  26 #include <arch/io.h>
  27 #include "mcp55.h"
  28 #include "smbus.h"
  29
  30 static int lsmbus_recv_byte(device_t dev)
  31 {
  32         unsigned device;
  33         struct resource *res;
  34         struct bus *pbus;
  35
  36         device = dev->path.i2c.device;
  37         pbus = get_pbus_smbus(dev);
  38
  39         res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));
  40
  41         return do_smbus_recv_byte(res->base, device);
  42 }
  43
  44 static int lsmbus_send_byte(device_t dev, u8 val)
  45 {
  46         unsigned device;
  47         struct resource *res;
  48         struct bus *pbus;
  49
  50         device = dev->path.i2c.device;
  51         pbus = get_pbus_smbus(dev);
  52
  53         res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));
  54
  55         return do_smbus_send_byte(res->base, device, val);
  56 }
  57
  58 static int lsmbus_read_byte(device_t dev, u8 address)
  59 {
  60         unsigned device;
  61         struct resource *res;
  62         struct bus *pbus;
  63
  64         device = dev->path.i2c.device;
  65         pbus = get_pbus_smbus(dev);
  66
  67         res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));
  68
  69         return do_smbus_read_byte(res->base, device, address);
  70 }
  71
  72 static int lsmbus_write_byte(device_t dev, u8 address, u8 val)
  73 {
  74         unsigned device;
  75         struct resource *res;
  76         struct bus *pbus;
  77
  78         device = dev->path.i2c.device;
  79         pbus = get_pbus_smbus(dev);
  80
  81         res = find_resource(pbus->dev, 0x20 + (pbus->link_num * 4));
  82
  83         return do_smbus_write_byte(res->base, device, address, val);
  84 }
  85 static struct smbus_bus_operations lops_smbus_bus = {
  86         .recv_byte      = lsmbus_recv_byte,
  87         .send_byte      = lsmbus_send_byte,
  88         .read_byte      = lsmbus_read_byte,
  89         .write_byte     = lsmbus_write_byte,
  90 };
  91
  92 #if CONFIG_HAVE_ACPI_TABLES
  93 unsigned pm_base;
  94 #endif
  95
  96 static void mcp55_sm_read_resources(device_t dev)
  97 {
  98         unsigned long index;
  99
 100         /* Get the normal pci resources of this device */
 101         pci_dev_read_resources(dev);
 102
 103         for (index = 0x60; index <= 0x68; index+=4) { // We got another 3.
 104                 pci_get_resource(dev, index);
 105         }
 106         compact_resources(dev);
 107 }
 108
 109 static void mcp55_sm_init(device_t dev)
 110 {
 111 #if CONFIG_HAVE_ACPI_TABLES
 112         struct resource *res;
 113
 114         res = find_resource(dev, 0x60);
 115
 116         if (res)
 117                 pm_base = res->base;
 118 #endif
 119 }
 120
 121 static struct device_operations smbus_ops = {
 122         .read_resources = mcp55_sm_read_resources,
 123         .set_resources  = pci_dev_set_resources,
 124         .enable_resources       = pci_dev_enable_resources,
 125         .init           = mcp55_sm_init,
 126         .scan_bus       = scan_smbus,
 127 //      .enable         = mcp55_enable,
 128         .ops_pci        = &mcp55_pci_ops,
 129         .ops_smbus_bus  = &lops_smbus_bus,
 130 };
 131 static const struct pci_driver smbus_driver __pci_driver = {
 132         .ops    = &smbus_ops,
 133         .vendor = PCI_VENDOR_ID_NVIDIA,
 134         .device = PCI_DEVICE_ID_NVIDIA_MCP55_SM2,
 135 };