arch/arm/mach-ixp23xx/roadrunner.c

   1 /*
   2  * arch/arm/mach-ixp23xx/roadrunner.c
   3  *
   4  * RoadRunner board-specific routines
   5  *
   6  * Author: Deepak Saxena <dsaxena@plexity.net>
   7  *
   8  * Copyright 2005 (c) MontaVista Software, Inc.
   9  *
  10  * Based on 2.4 code Copyright 2005 (c) ADI Engineering Corporation
  11  *
  12  * This file is licensed under the terms of the GNU General Public
  13  * License version 2. This program is licensed "as is" without any
  14  * warranty of any kind, whether express or implied.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/spinlock.h>
  20 #include <linux/sched.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/serial.h>
  23 #include <linux/tty.h>
  24 #include <linux/bitops.h>
  25 #include <linux/ioport.h>
  26 #include <linux/serial_8250.h>
  27 #include <linux/serial_core.h>
  28 #include <linux/device.h>
  29 #include <linux/mm.h>
  30 #include <linux/pci.h>
  31 #include <linux/mtd/physmap.h>
  32
  33 #include <asm/types.h>
  34 #include <asm/setup.h>
  35 #include <asm/memory.h>
  36 #include <mach/hardware.h>
  37 #include <asm/mach-types.h>
  38 #include <asm/irq.h>
  39 #include <asm/system.h>
  40 #include <asm/tlbflush.h>
  41 #include <asm/pgtable.h>
  42
  43 #include <asm/mach/map.h>
  44 #include <asm/mach/irq.h>
  45 #include <asm/mach/arch.h>
  46 #include <asm/mach/pci.h>
  47
  48 /*
  49  * Interrupt mapping
  50  */
  51 #define INTA            IRQ_ROADRUNNER_PCI_INTA
  52 #define INTB            IRQ_ROADRUNNER_PCI_INTB
  53 #define INTC            IRQ_ROADRUNNER_PCI_INTC
  54 #define INTD            IRQ_ROADRUNNER_PCI_INTD
  55
  56 #define INTC_PIN        IXP23XX_GPIO_PIN_11
  57 #define INTD_PIN        IXP23XX_GPIO_PIN_12
  58
  59 static int __init roadrunner_map_irq(const struct pci_dev *dev, u8 idsel,
  60         u8 pin)
  61 {
  62         static int pci_card_slot_irq[] = {INTB, INTC, INTD, INTA};
  63         static int pmc_card_slot_irq[] = {INTA, INTB, INTC, INTD};
  64         static int usb_irq[] = {INTB, INTC, INTD, -1};
  65         static int mini_pci_1_irq[] = {INTB, INTC, -1, -1};
  66         static int mini_pci_2_irq[] = {INTC, INTD, -1, -1};
  67
  68         switch(dev->bus->number) {
  69                 case 0:
  70                         switch(dev->devfn) {
  71                         case 0x0: // PCI-PCI bridge
  72                                 break;
  73                         case 0x8: // PCI Card Slot
  74                                 return pci_card_slot_irq[pin - 1];
  75                         case 0x10: // PMC Slot
  76                                 return pmc_card_slot_irq[pin - 1];
  77                         case 0x18: // PMC Slot Secondary Agent
  78                                 break;
  79                         case 0x20: // IXP Processor
  80                                 break;
  81                         default:
  82                                 return NO_IRQ;
  83                         }
  84                         break;
  85
  86                 case 1:
  87                         switch(dev->devfn) {
  88                         case 0x0: // IDE Controller
  89                                 return (pin == 1) ? INTC : -1;
  90                         case 0x8: // USB fun 0
  91                         case 0x9: // USB fun 1
  92                         case 0xa: // USB fun 2
  93                                 return usb_irq[pin - 1];
  94                         case 0x10: // Mini PCI 1
  95                                 return mini_pci_1_irq[pin-1];
  96                         case 0x18: // Mini PCI 2
  97                                 return mini_pci_2_irq[pin-1];
  98                         case 0x20: // MEM slot
  99                                 return (pin == 1) ? INTA : -1;
 100                         default:
 101                                 return NO_IRQ;
 102                         }
 103                         break;
 104
 105                 default:
 106                         return NO_IRQ;
 107         }
 108
 109         return NO_IRQ;
 110 }
 111
 112 static void __init roadrunner_pci_preinit(void)
 113 {
 114         irq_set_irq_type(IRQ_ROADRUNNER_PCI_INTC, IRQ_TYPE_LEVEL_LOW);
 115         irq_set_irq_type(IRQ_ROADRUNNER_PCI_INTD, IRQ_TYPE_LEVEL_LOW);
 116
 117         ixp23xx_pci_preinit();
 118 }
 119
 120 static struct hw_pci roadrunner_pci __initdata = {
 121         .nr_controllers = 1,
 122         .preinit        = roadrunner_pci_preinit,
 123         .setup          = ixp23xx_pci_setup,
 124         .scan           = ixp23xx_pci_scan_bus,
 125         .map_irq        = roadrunner_map_irq,
 126 };
 127
 128 static int __init roadrunner_pci_init(void)
 129 {
 130         if (machine_is_roadrunner())
 131                 pci_common_init(&roadrunner_pci);
 132
 133         return 0;
 134 };
 135
 136 subsys_initcall(roadrunner_pci_init);
 137
 138 static struct physmap_flash_data roadrunner_flash_data = {
 139         .width          = 2,
 140 };
 141
 142 static struct resource roadrunner_flash_resource = {
 143         .start          = 0x90000000,
 144         .end            = 0x93ffffff,
 145         .flags          = IORESOURCE_MEM,
 146 };
 147
 148 static struct platform_device roadrunner_flash = {
 149         .name           = "physmap-flash",
 150         .id             = 0,
 151         .dev            = {
 152                 .platform_data  = &roadrunner_flash_data,
 153         },
 154         .num_resources  = 1,
 155         .resource       = &roadrunner_flash_resource,
 156 };
 157
 158 static void __init roadrunner_init(void)
 159 {
 160         platform_device_register(&roadrunner_flash);
 161
 162         /*
 163          * Mark flash as writeable
 164          */
 165         IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
 166         IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
 167         IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
 168         IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
 169
 170         ixp23xx_sys_init();
 171 }
 172
 173 MACHINE_START(ROADRUNNER, "ADI Engineering RoadRunner Development Platform")
 174         /* Maintainer: Deepak Saxena */
 175         .map_io         = ixp23xx_map_io,
 176         .init_irq       = ixp23xx_init_irq,
 177         .timer          = &ixp23xx_timer,
 178         .atag_offset    = 0x100,
 179         .init_machine   = roadrunner_init,
 180         .restart        = ixp23xx_restart,
 181 MACHINE_END