arch/ppc/platforms/spruce_pci.c

   1 /*
   2  * arch/ppc/platforms/spruce_pci.c
   3  *
   4  * PCI support for IBM Spruce
   5  *
   6  * Author: Johnnie Peters
   7  *         jpeters@mvista.com
   8  *
   9  * 2000 (c) MontaVista, Software, Inc.  This file is licensed under
  10  * the terms of the GNU General Public License version 2.  This program
  11  * is licensed "as is" without any warranty of any kind, whether express
  12  * or implied.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/pci.h>
  18 #include <linux/slab.h>
  19
  20 #include <asm/byteorder.h>
  21 #include <asm/io.h>
  22 #include <asm/uaccess.h>
  23 #include <asm/machdep.h>
  24 #include <asm/pci-bridge.h>
  25 #include <platforms/spruce.h>
  26
  27 #include "cpc700.h"
  28
  29 static inline int
  30 spruce_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
  31 {
  32         static char pci_irq_table[][4] =
  33                 /*
  34                  *      PCI IDSEL/INTPIN->INTLINE
  35                  *      A       B       C       D
  36                  */
  37         {
  38                 {23, 24, 25, 26},       /* IDSEL 1 - PCI slot 3 */
  39                 {24, 25, 26, 23},       /* IDSEL 2 - PCI slot 2 */
  40                 {25, 26, 23, 24},       /* IDSEL 3 - PCI slot 1 */
  41                 {26, 23, 24, 25},       /* IDSEL 4 - PCI slot 0 */
  42         };
  43
  44         const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
  45         return PCI_IRQ_TABLE_LOOKUP;
  46 }
  47
  48 void __init
  49 spruce_setup_hose(void)
  50 {
  51         struct pci_controller *hose;
  52
  53         /* Setup hose */
  54         hose = pcibios_alloc_controller();
  55         if (!hose)
  56                 return;
  57
  58         hose->first_busno = 0;
  59         hose->last_busno = 0xff;
  60
  61         pci_init_resource(&hose->io_resource,
  62                         SPRUCE_PCI_LOWER_IO,
  63                         SPRUCE_PCI_UPPER_IO,
  64                         IORESOURCE_IO,
  65                         "PCI host bridge");
  66
  67         pci_init_resource(&hose->mem_resources[0],
  68                         SPRUCE_PCI_LOWER_MEM,
  69                         SPRUCE_PCI_UPPER_MEM,
  70                         IORESOURCE_MEM,
  71                         "PCI host bridge");
  72
  73         hose->io_space.start = SPRUCE_PCI_LOWER_IO;
  74         hose->io_space.end = SPRUCE_PCI_UPPER_IO;
  75         hose->mem_space.start = SPRUCE_PCI_LOWER_MEM;
  76         hose->mem_space.end = SPRUCE_PCI_UPPER_MEM;
  77         hose->io_base_virt = (void *)SPRUCE_ISA_IO_BASE;
  78
  79         setup_indirect_pci(hose,
  80                         SPRUCE_PCI_CONFIG_ADDR,
  81                         SPRUCE_PCI_CONFIG_DATA);
  82
  83         hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
  84
  85         ppc_md.pci_swizzle = common_swizzle;
  86         ppc_md.pci_map_irq = spruce_map_irq;
  87 }