arch/sh/drivers/pci/ops-bigsur.c

   1 /*
   2  * linux/arch/sh/drivers/pci/ops-bigsur.c
   3  *
   4  * By Dustin McIntire (dustin@sensoria.com) (c)2001
   5  *
   6  * Ported to new API by Paul Mundt <lethal@linux-sh.org>.
   7  *
   8  * May be copied or modified under the terms of the GNU General Public
   9  * License.  See linux/COPYING for more information.
  10  *
  11  * PCI initialization for the Hitachi Big Sur Evaluation Board
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/types.h>
  15 #include <linux/init.h>
  16 #include <linux/pci.h>
  17 #include <asm/io.h>
  18 #include "pci-sh4.h"
  19 #include <asm/bigsur/bigsur.h>
  20
  21 #define BIGSUR_PCI_IO   0x4000
  22 #define BIGSUR_PCI_MEM  0xfd000000
  23
  24 static struct resource sh7751_io_resource = {
  25         .name           = "SH7751 IO",
  26         .start          = BIGSUR_PCI_IO,
  27         .end            = BIGSUR_PCI_IO + (64*1024) - 1,
  28         .flags          = IORESOURCE_IO,
  29 };
  30
  31 static struct resource sh7751_mem_resource = {
  32         .name           = "SH7751 mem",
  33         .start          = BIGSUR_PCI_MEM,
  34         .end            = BIGSUR_PCI_MEM + (64*1024*1024) - 1,
  35         .flags          = IORESOURCE_MEM,
  36 };
  37
  38 extern struct pci_ops sh7751_pci_ops;
  39
  40 struct pci_channel board_pci_channels[] = {
  41         { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
  42         { 0, }
  43 };
  44
  45 static struct sh4_pci_address_map sh7751_pci_map = {
  46         .window0        = {
  47                 .base   = SH7751_CS3_BASE_ADDR,
  48                 .size   = BIGSUR_LSR0_SIZE,
  49         },
  50
  51         .window1        = {
  52                 .base   = SH7751_CS3_BASE_ADDR,
  53                 .size   = BIGSUR_LSR1_SIZE,
  54         },
  55 };
  56
  57 /*
  58  * Initialize the Big Sur PCI interface
  59  * Setup hardware to be Central Funtion
  60  * Copy the BSR regs to the PCI interface
  61  * Setup PCI windows into local RAM
  62  */
  63 int __init pcibios_init_platform(void)
  64 {
  65         return sh7751_pcic_init(&sh7751_pci_map);
  66 }
  67
  68 int __init pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)
  69 {
  70         /*
  71          * The Big Sur can be used in a CPCI chassis, but the SH7751 PCI
  72          * interface is on the wrong end of the board so that it can also
  73          * support a V320 CPI interface chip...  Therefor the IRQ mapping is
  74          * somewhat use dependent... I'l assume a linear map for now, i.e.
  75          * INTA=slot0,pin0... INTD=slot3,pin0...
  76          */
  77         int irq = (slot + pin-1) % 4 + BIGSUR_SH7751_PCI_IRQ_BASE;
  78
  79         PCIDBG(2, "PCI: Mapping Big Sur IRQ for slot %d, pin %c to irq %d\n",
  80                slot, pin-1+'A', irq);
  81
  82         return irq;
  83 }