src/southbridge/broadcom/bcm5785/lpc.c

   1 /*
   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.
  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 <console/console.h>
  22 #include <device/device.h>
  23 #include <device/pci.h>
  24 #include <device/pnp.h>
  25 #include <device/pci_ids.h>
  26 #include <device/pci_ops.h>
  27 #include <pc80/mc146818rtc.h>
  28 #include <pc80/isa-dma.h>
  29 #include <bitops.h>
  30 #include <arch/io.h>
  31 #include <arch/ioapic.h>
  32 #include "bcm5785.h"
  33
  34 static void lpc_init(device_t dev)
  35 {
  36         /* Initialize the real time clock */
  37         rtc_init(0);
  38
  39         /* Initialize isa dma */
  40         isa_dma_init();
  41 }
  42
  43 static void bcm5785_lpc_read_resources(device_t dev)
  44 {
  45         struct resource *res;
  46
  47         /* Get the normal pci resources of this device */
  48         pci_dev_read_resources(dev);
  49
  50         /* Add an extra subtractive resource for both memory and I/O. */
  51         res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
  52         res->base = 0;
  53         res->size = 0x1000;
  54         res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
  55                      IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
  56
  57         res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
  58         res->base = 0xff800000;
  59         res->size = 0x00800000; /* 8 MB for flash */
  60         res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
  61                      IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
  62
  63         res = new_resource(dev, 3); /* IOAPIC */
  64         res->base = IO_APIC_ADDR;
  65         res->size = 0x00001000;
  66         res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
  67 }
  68
  69 /**
  70  * Enable resources for children devices.
  71  *
  72  * @param dev The device whos children's resources are to be enabled.
  73  */
  74 static void bcm5785_lpc_enable_childrens_resources(device_t dev)
  75 {
  76         struct bus *link;
  77         uint32_t reg;
  78
  79         reg = pci_read_config8(dev, 0x44);
  80
  81         for (link = dev->link_list; link; link = link->next) {
  82                 device_t child;
  83                 for (child = link->children; child; child = child->sibling) {
  84                         if(child->enabled && (child->path.type == DEVICE_PATH_PNP)) {
  85                                 struct resource *res;
  86                                 for(res = child->resource_list; res; res = res->next) {
  87                                         unsigned long base, end; // don't need long long
  88                                         if(!(res->flags & IORESOURCE_IO)) continue;
  89                                         base = res->base;
  90                                         end = resource_end(res);
  91                                         printk(BIOS_DEBUG, "bcm5785lpc decode:%s, base=0x%08lx, end=0x%08lx\n",dev_path(child),base, end);
  92                                         switch(base) {
  93                                         case 0x60: //KBC
  94                                         case 0x64:
  95                                                 reg |= (1<<29);
  96                                         case 0x3f8: // COM1
  97                                                 reg |= (1<<6);  break;
  98                                         case 0x2f8: // COM2
  99                                                 reg |= (1<<7);  break;
 100                                         case 0x378: // Parallal 1
 101                                                 reg |= (1<<0); break;
 102                                         case 0x3f0: // FD0
 103                                                 reg |= (1<<26); break;
 104                                         case 0x220:  // Aduio 0
 105                                                 reg |= (1<<14); break;
 106                                         case 0x300:  // Midi 0
 107                                                 reg |= (1<<18); break;
 108                                         }
 109                                 }
 110                         }
 111                 }
 112         }
 113         pci_write_config32(dev, 0x44, reg);
 114
 115
 116 }
 117
 118 static void bcm5785_lpc_enable_resources(device_t dev)
 119 {
 120         pci_dev_enable_resources(dev);
 121         bcm5785_lpc_enable_childrens_resources(dev);
 122 }
 123
 124 static void lpci_set_subsystem(device_t dev, unsigned vendor, unsigned device)
 125 {
 126         pci_write_config32(dev, 0x40,
 127                 ((device & 0xffff) << 16) | (vendor & 0xffff));
 128 }
 129
 130 static struct pci_operations lops_pci = {
 131         .set_subsystem = lpci_set_subsystem,
 132 };
 133
 134 static struct device_operations lpc_ops  = {
 135         .read_resources   = bcm5785_lpc_read_resources,
 136         .set_resources    = pci_dev_set_resources,
 137         .enable_resources = bcm5785_lpc_enable_resources,
 138         .init             = lpc_init,
 139         .scan_bus         = scan_static_bus,
 140 //      .enable           = bcm5785_enable,
 141         .ops_pci          = &lops_pci,
 142 };
 143
 144 static const struct pci_driver lpc_driver __pci_driver = {
 145         .ops    = &lpc_ops,
 146         .vendor = PCI_VENDOR_ID_SERVERWORKS,
 147         .device = PCI_DEVICE_ID_SERVERWORKS_BCM5785_LPC,
 148 };