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   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.h>
  27 #include <linux/serial_8250.h>
  28 #include <linux/serial_core.h>
  29 #include <linux/device.h>
  30 #include <linux/mm.h>
  31 #include <linux/pci.h>
  32 #include <linux/mtd/physmap.h>
  33
  34 #include <asm/types.h>
  35 #include <asm/setup.h>
  36 #include <asm/memory.h>
  37 #include <asm/hardware.h>
  38 #include <asm/mach-types.h>
  39 #include <asm/irq.h>
  40 #include <asm/system.h>
  41 #include <asm/tlbflush.h>
  42 #include <asm/pgtable.h>
  43
  44 #include <asm/mach/map.h>
  45 #include <asm/mach/irq.h>
  46 #include <asm/mach/arch.h>
  47 #include <asm/mach/irq.h>
  48 #include <asm/mach/pci.h>
  49
  50 /*
  51  * Interrupt mapping
  52  */
  53 #define INTA            IRQ_ROADRUNNER_PCI_INTA
  54 #define INTB            IRQ_ROADRUNNER_PCI_INTB
  55 #define INTC            IRQ_ROADRUNNER_PCI_INTC
  56 #define INTD            IRQ_ROADRUNNER_PCI_INTD
  57
  58 #define INTC_PIN        IXP23XX_GPIO_PIN_11
  59 #define INTD_PIN        IXP23XX_GPIO_PIN_12
  60
  61 static int __init roadrunner_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
  62 {
  63         static int pci_card_slot_irq[] = {INTB, INTC, INTD, INTA};
  64         static int pmc_card_slot_irq[] = {INTA, INTB, INTC, INTD};
  65         static int usb_irq[] = {INTB, INTC, INTD, -1};
  66         static int mini_pci_1_irq[] = {INTB, INTC, -1, -1};
  67         static int mini_pci_2_irq[] = {INTC, INTD, -1, -1};
  68
  69         switch(dev->bus->number) {
  70                 case 0:
  71                         switch(dev->devfn) {
  72                         case 0x0: // PCI-PCI bridge
  73                                 break;
  74                         case 0x8: // PCI Card Slot
  75                                 return pci_card_slot_irq[pin - 1];
  76                         case 0x10: // PMC Slot
  77                                 return pmc_card_slot_irq[pin - 1];
  78                         case 0x18: // PMC Slot Secondary Agent
  79                                 break;
  80                         case 0x20: // IXP Processor
  81                                 break;
  82                         default:
  83                                 return NO_IRQ;
  84                         }
  85                         break;
  86
  87                 case 1:
  88                         switch(dev->devfn) {
  89                         case 0x0: // IDE Controller
  90                                 return (pin == 1) ? INTC : -1;
  91                         case 0x8: // USB fun 0
  92                         case 0x9: // USB fun 1
  93                         case 0xa: // USB fun 2
  94                                 return usb_irq[pin - 1];
  95                         case 0x10: // Mini PCI 1
  96                                 return mini_pci_1_irq[pin-1];
  97                         case 0x18: // Mini PCI 2
  98                                 return mini_pci_2_irq[pin-1];
  99                         case 0x20: // MEM slot
 100                                 return (pin == 1) ? INTA : -1;
 101                         default:
 102                                 return NO_IRQ;
 103                         }
 104                         break;
 105
 106                 default:
 107                         return NO_IRQ;
 108         }
 109
 110         return NO_IRQ;
 111 }
 112
 113 static void __init roadrunner_pci_preinit(void)
 114 {
 115         set_irq_type(IRQ_ROADRUNNER_PCI_INTC, IRQT_LOW);
 116         set_irq_type(IRQ_ROADRUNNER_PCI_INTD, IRQT_LOW);
 117
 118         ixp23xx_pci_preinit();
 119 }
 120
 121 static struct hw_pci roadrunner_pci __initdata = {
 122         .nr_controllers = 1,
 123         .preinit        = roadrunner_pci_preinit,
 124         .setup          = ixp23xx_pci_setup,
 125         .scan           = ixp23xx_pci_scan_bus,
 126         .map_irq        = roadrunner_map_irq,
 127 };
 128
 129 static int __init roadrunner_pci_init(void)
 130 {
 131         if (machine_is_roadrunner())
 132                 pci_common_init(&roadrunner_pci);
 133
 134         return 0;
 135 };
 136
 137 subsys_initcall(roadrunner_pci_init);
 138
 139 static struct physmap_flash_data roadrunner_flash_data = {
 140         .width          = 2,
 141 };
 142
 143 static struct resource roadrunner_flash_resource = {
 144         .start          = 0x90000000,
 145         .end            = 0x93ffffff,
 146         .flags          = IORESOURCE_MEM,
 147 };
 148
 149 static struct platform_device roadrunner_flash = {
 150         .name           = "physmap-flash",
 151         .id             = 0,
 152         .dev            = {
 153                 .platform_data  = &roadrunner_flash_data,
 154         },
 155         .num_resources  = 1,
 156         .resource       = &roadrunner_flash_resource,
 157 };
 158
 159 static void __init roadrunner_init(void)
 160 {
 161         platform_device_register(&roadrunner_flash);
 162
 163         /*
 164          * Mark flash as writeable
 165          */
 166         IXP23XX_EXP_CS0[0] |= IXP23XX_FLASH_WRITABLE;
 167         IXP23XX_EXP_CS0[1] |= IXP23XX_FLASH_WRITABLE;
 168         IXP23XX_EXP_CS0[2] |= IXP23XX_FLASH_WRITABLE;
 169         IXP23XX_EXP_CS0[3] |= IXP23XX_FLASH_WRITABLE;
 170
 171         ixp23xx_sys_init();
 172 }
 173
 174 MACHINE_START(ROADRUNNER, "ADI Engineering RoadRunner Development Platform")
 175         /* Maintainer: Deepak Saxena */
 176         .phys_io        = IXP23XX_PERIPHERAL_PHYS,
 177         .io_pg_offst    = ((IXP23XX_PERIPHERAL_VIRT >> 18)) & 0xfffc,
 178         .map_io         = ixp23xx_map_io,
 179         .init_irq       = ixp23xx_init_irq,
 180         .timer          = &ixp23xx_timer,
 181         .boot_params    = 0x00000100,
 182         .init_machine   = roadrunner_init,
 183 MACHINE_END