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

   1 /*
   2  * arch/sh/drivers/pci/ops-snapgear.c
   3  *
   4  * Author:  David McCullough <davidm@snapgear.com>
   5  *
   6  * Ported to new API by Paul Mundt <lethal@linux-sh.org>
   7  *
   8  * Highly leveraged from pci-bigsur.c, written by Dustin McIntire.
   9  *
  10  * May be copied or modified under the terms of the GNU General Public
  11  * License.  See linux/COPYING for more information.
  12  *
  13  * PCI initialization for the SnapGear boards
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/kernel.h>
  18 #include <linux/types.h>
  19 #include <linux/init.h>
  20 #include <linux/delay.h>
  21 #include <linux/pci.h>
  22
  23 #include <asm/io.h>
  24 #include "pci-sh7751.h"
  25
  26 #define SNAPGEAR_PCI_IO         0x4000
  27 #define SNAPGEAR_PCI_MEM        0xfd000000
  28
  29 /* PCI: default LOCAL memory window sizes (seen from PCI bus) */
  30 #define SNAPGEAR_LSR0_SIZE    (64*(1<<20)) //64MB
  31 #define SNAPGEAR_LSR1_SIZE    (64*(1<<20)) //64MB
  32
  33 static struct resource sh7751_io_resource = {
  34         .name           = "SH7751 IO",
  35         .start          = SNAPGEAR_PCI_IO,
  36         .end            = SNAPGEAR_PCI_IO + (64*1024) - 1, /* 64KiB I/O */
  37         .flags          = IORESOURCE_IO,
  38 };
  39
  40 static struct resource sh7751_mem_resource = {
  41         .name           = "SH7751 mem",
  42         .start          = SNAPGEAR_PCI_MEM,
  43         .end            = SNAPGEAR_PCI_MEM + (64*1024*1024) - 1, /* 64MiB mem */
  44         .flags          = IORESOURCE_MEM,
  45 };
  46
  47 extern struct pci_ops sh7751_pci_ops;
  48
  49 struct pci_channel board_pci_channels[] = {
  50         { &sh7751_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
  51         { 0, }
  52 };
  53
  54 static struct sh7751_pci_address_map sh7751_pci_map = {
  55         .window0        = {
  56                 .base   = SH7751_CS2_BASE_ADDR,
  57                 .size   = SNAPGEAR_LSR0_SIZE,
  58         },
  59
  60         .window1        = {
  61                 .base   = SH7751_CS2_BASE_ADDR,
  62                 .size   = SNAPGEAR_LSR1_SIZE,
  63         },
  64
  65         .flags  = SH7751_PCIC_NO_RESET,
  66 };
  67
  68 /*
  69  * Initialize the SnapGear PCI interface
  70  * Setup hardware to be Central Funtion
  71  * Copy the BSR regs to the PCI interface
  72  * Setup PCI windows into local RAM
  73  */
  74 int __init pcibios_init_platform(void)
  75 {
  76         return sh7751_pcic_init(&sh7751_pci_map);
  77 }
  78
  79 int __init pcibios_map_platform_irq(u8 slot, u8 pin)
  80 {
  81         int irq = -1;
  82
  83         switch (slot) {
  84         case 8:  /* the PCI bridge */ break;
  85         case 11: irq = 8;  break; /* USB    */
  86         case 12: irq = 11; break; /* PCMCIA */
  87         case 13: irq = 5;  break; /* eth0   */
  88         case 14: irq = 8;  break; /* eth1   */
  89         case 15: irq = 11; break; /* safenet (unused) */
  90         }
  91
  92         printk("PCI: Mapping SnapGear IRQ for slot %d, pin %c to irq %d\n",
  93                slot, pin - 1 + 'A', irq);
  94
  95         return irq;
  96 }
  97
  98 void __init pcibios_fixup(void)
  99 {
 100         /* Nothing to fixup .. */
 101 }
 102