src/southbridge/broadcom/bcm5785/bcm5785_lpc.c

   1 /*
   2  * Copyright  2005 AMD
   3  *  by yinghai.lu@amd.com
   4  */
   5
   6 #include <console/console.h>
   7 #include <device/device.h>
   8 #include <device/pci.h>
   9 #include <device/pnp.h>
  10 #include <device/pci_ids.h>
  11 #include <device/pci_ops.h>
  12 #include <pc80/mc146818rtc.h>
  13 #include <pc80/isa-dma.h>
  14 #include <bitops.h>
  15 #include <arch/io.h>
  16 #include "bcm5785.h"
  17
  18 static void lpc_init(device_t dev)
  19 {
  20
  21         /* Initialize the real time clock */
  22         rtc_init(0);
  23
  24         /* Initialize isa dma */
  25         isa_dma_init();
  26
  27 }
  28
  29 static void bcm5785_lpc_read_resources(device_t dev)
  30 {
  31         struct resource *res;
  32         unsigned long index;
  33
  34         /* Get the normal pci resources of this device */
  35         pci_dev_read_resources(dev);
  36
  37         /* Add an extra subtractive resource for both memory and I/O */
  38         res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
  39         res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
  40
  41         res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
  42         res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED;
  43
  44 }
  45
  46 /**
  47  * @brief Enable resources for children devices
  48  *
  49  * @param dev the device whos children's resources are to be enabled
  50  *
  51  * This function is call by the global enable_resources() indirectly via the
  52  * device_operation::enable_resources() method of devices.
  53  *
  54  * Indirect mutual recursion:
  55  *      enable_childrens_resources() -> enable_resources()
  56  *      enable_resources() -> device_operation::enable_resources()
  57  *      device_operation::enable_resources() -> enable_children_resources()
  58  */
  59 static void bcm5785_lpc_enable_childrens_resources(device_t dev)
  60 {
  61         unsigned link;
  62         uint32_t reg;
  63         int i;
  64         int var_num = 0;
  65
  66         reg = pci_read_config8(dev, 0x44);
  67
  68         for (link = 0; link < dev->links; link++) {
  69                 device_t child;
  70                 for (child = dev->link[link].children; child; child = child->sibling) {
  71                         enable_resources(child);
  72                         if(child->have_resources && (child->path.type == DEVICE_PATH_PNP)) {
  73                                 for(i=0;i<child->resources;i++) {
  74                                         struct resource *res;
  75                                         unsigned long base, end; // don't need long long
  76                                         res = &child->resource[i];
  77                                         if(!(res->flags & IORESOURCE_IO)) continue;
  78                                         base = res->base;
  79                                         end = resource_end(res);
  80                                         printk_debug("bcm5785lpc decode:%s, base=0x%08x, end=0x%08x\r\n",dev_path(child),base, end);
  81                                         switch(base) {
  82                                         case 0x60: //KBC
  83                                         case 0x64:
  84                                                 reg |= (1<<29);
  85                                         case 0x3f8: // COM1
  86                                                 reg |= (1<<6);  break;
  87                                         case 0x2f8: // COM2
  88                                                 reg |= (1<<7);  break;
  89                                         case 0x378: // Parallal 1
  90                                                 reg |= (1<<0); break;
  91                                         case 0x3f0: // FD0
  92                                                 reg |= (1<<26); break;
  93                                         case 0x220:  // Aduio 0
  94                                                 reg |= (1<<14); break;
  95                                         case 0x300:  // Midi 0
  96                                                 reg |= (1<<18); break;
  97                                         }
  98                                 }
  99                         }
 100                 }
 101         }
 102         pci_write_config32(dev, 0x44, reg);
 103
 104
 105 }
 106
 107 static void bcm5785_lpc_enable_resources(device_t dev)
 108 {
 109         pci_dev_enable_resources(dev);
 110         bcm5785_lpc_enable_childrens_resources(dev);
 111 }
 112
 113 static void lpci_set_subsystem(device_t dev, unsigned vendor, unsigned device)
 114 {
 115         pci_write_config32(dev, 0x40,
 116                 ((device & 0xffff) << 16) | (vendor & 0xffff));
 117 }
 118
 119 static struct pci_operations lops_pci = {
 120         .set_subsystem = lpci_set_subsystem,
 121 };
 122
 123 static struct device_operations lpc_ops  = {
 124         .read_resources   = bcm5785_lpc_read_resources,
 125         .set_resources    = pci_dev_set_resources,
 126         .enable_resources = bcm5785_lpc_enable_resources,
 127         .init             = lpc_init,
 128         .scan_bus         = scan_static_bus,
 129 //      .enable           = bcm5785_enable,
 130         .ops_pci          = &lops_pci,
 131 };
 132 static const struct pci_driver lpc_driver __pci_driver = {
 133         .ops    = &lpc_ops,
 134         .vendor = PCI_VENDOR_ID_SERVERWORKS,
 135         .device = PCI_DEVICE_ID_SERVERWORKS_BCM5785_LPC,
 136 };
 137