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

   1 /*
   2  * linux/arch/sh/kernel/pci-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
  14 #include <linux/config.h>
  15 #include <linux/kernel.h>
  16 #include <linux/types.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pci.h>
  20
  21 #include <asm/io.h>
  22 #include "pci-sh7751.h"
  23 #include <asm/bigsur/bigsur.h>
  24
  25 #define BIGSUR_PCI_IO   0x4000
  26 #define BIGSUR_PCI_MEM  0xfd000000
  27
  28 static struct resource sh7751_io_resource = {
  29         .name           = "SH7751 IO",
  30         .start          = BIGSUR_PCI_IO,
  31         .end            = BIGSUR_PCI_IO + (64*1024) - 1,
  32         .flags          = IORESOURCE_IO,
  33 };
  34
  35 static struct resource sh7751_mem_resource = {
  36         .name           = "SH7751 mem",
  37         .start          = BIGSUR_PCI_MEM,
  38         .end            = BIGSUR_PCI_MEM + (64*1024*1024) - 1,
  39         .flags          = IORESOURCE_MEM,
  40 };
  41
  42 extern struct pci_ops sh7751_pci_ops;
  43
  44 struct pci_channel board_pci_channels[] = {
  45         { &sh7751_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
  46         { 0, }
  47 };
  48
  49 static struct sh7751_pci_address_map sh7751_pci_map = {
  50         .window0        = {
  51                 .base   = SH7751_CS3_BASE_ADDR,
  52                 .size   = BIGSUR_LSR0_SIZE,
  53         },
  54
  55         .window1        = {
  56                 .base   = SH7751_CS3_BASE_ADDR,
  57                 .size   = BIGSUR_LSR1_SIZE,
  58         },
  59 };
  60
  61 /*
  62  * Initialize the Big Sur PCI interface
  63  * Setup hardware to be Central Funtion
  64  * Copy the BSR regs to the PCI interface
  65  * Setup PCI windows into local RAM
  66  */
  67 int __init pcibios_init_platform(void)
  68 {
  69         return sh7751_pcic_init(&sh7751_pci_map);
  70 }
  71
  72 int pcibios_map_platform_irq(u8 slot, u8 pin)
  73 {
  74         /*
  75          * The Big Sur can be used in a CPCI chassis, but the SH7751 PCI
  76          * interface is on the wrong end of the board so that it can also
  77          * support a V320 CPI interface chip...  Therefor the IRQ mapping is
  78          * somewhat use dependent... I'l assume a linear map for now, i.e.
  79          * INTA=slot0,pin0... INTD=slot3,pin0...
  80          */
  81         int irq = (slot + pin-1) % 4 + BIGSUR_SH7751_PCI_IRQ_BASE;
  82
  83         PCIDBG(2, "PCI: Mapping Big Sur IRQ for slot %d, pin %c to irq %d\n",
  84                slot, pin-1+'A', irq);
  85
  86         return irq;
  87 }
  88