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 #include <linux/kernel.h>
  16 #include <linux/types.h>
  17 #include <linux/init.h>
  18 #include <linux/pci.h>
  19 #include "pci-sh4.h"
  20
  21 #define SNAPGEAR_PCI_IO         0x4000
  22 #define SNAPGEAR_PCI_MEM        0xfd000000
  23
  24 /* PCI: default LOCAL memory window sizes (seen from PCI bus) */
  25 #define SNAPGEAR_LSR0_SIZE    (64*(1<<20)) //64MB
  26 #define SNAPGEAR_LSR1_SIZE    (64*(1<<20)) //64MB
  27
  28 static struct resource sh7751_io_resource = {
  29         .name           = "SH7751 IO",
  30         .start          = SNAPGEAR_PCI_IO,
  31         .end            = SNAPGEAR_PCI_IO + (64*1024) - 1, /* 64KiB I/O */
  32         .flags          = IORESOURCE_IO,
  33 };
  34
  35 static struct resource sh7751_mem_resource = {
  36         .name           = "SH7751 mem",
  37         .start          = SNAPGEAR_PCI_MEM,
  38         .end            = SNAPGEAR_PCI_MEM + (64*1024*1024) - 1, /* 64MiB mem */
  39         .flags          = IORESOURCE_MEM,
  40 };
  41
  42 struct pci_channel board_pci_channels[] = {
  43         { &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
  44         { 0, }
  45 };
  46
  47 static struct sh4_pci_address_map sh7751_pci_map = {
  48         .window0        = {
  49                 .base   = SH7751_CS2_BASE_ADDR,
  50                 .size   = SNAPGEAR_LSR0_SIZE,
  51         },
  52
  53         .window1        = {
  54                 .base   = SH7751_CS2_BASE_ADDR,
  55                 .size   = SNAPGEAR_LSR1_SIZE,
  56         },
  57
  58         .flags  = SH4_PCIC_NO_RESET,
  59 };
  60
  61 /*
  62  * Initialize the SnapGear 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 __init pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)
  73 {
  74         int irq = -1;
  75
  76         switch (slot) {
  77         case 8:  /* the PCI bridge */ break;
  78         case 11: irq = 8;  break; /* USB    */
  79         case 12: irq = 11; break; /* PCMCIA */
  80         case 13: irq = 5;  break; /* eth0   */
  81         case 14: irq = 8;  break; /* eth1   */
  82         case 15: irq = 11; break; /* safenet (unused) */
  83         }
  84
  85         printk("PCI: Mapping SnapGear IRQ for slot %d, pin %c to irq %d\n",
  86                slot, pin - 1 + 'A', irq);
  87
  88         return irq;
  89 }
  90
  91 void __init pcibios_fixup(void)
  92 {
  93         /* Nothing to fixup .. */
  94 }