arch/arm/mach-iop3xx/iq80332-pci.c

   1 /*
   2  * arch/arm/mach-iop3xx/iq80332-pci.c
   3  *
   4  * PCI support for the Intel IQ80332 reference board
   5  *
   6  * Author: Dave Jiang <dave.jiang@intel.com>
   7  * Copyright (C) 2004 Intel Corp.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/init.h>
  16 #include <linux/string.h>
  17 #include <linux/slab.h>
  18
  19 #include <asm/hardware.h>
  20 #include <asm/irq.h>
  21 #include <asm/mach/pci.h>
  22 #include <asm/mach-types.h>
  23
  24 /*
  25  * The following macro is used to lookup irqs in a standard table
  26  * format for those systems that do not already have PCI
  27  * interrupts properly routed.  We assume 1 <= pin <= 4
  28  */
  29 #define PCI_IRQ_TABLE_LOOKUP(minid,maxid)       \
  30 ({ int _ctl_ = -1;                              \
  31    unsigned int _idsel = idsel - minid;         \
  32    if (_idsel <= maxid)                         \
  33       _ctl_ = pci_irq_table[_idsel][pin-1];     \
  34    _ctl_; })
  35
  36 #define INTA    IRQ_IQ80332_INTA
  37 #define INTB    IRQ_IQ80332_INTB
  38 #define INTC    IRQ_IQ80332_INTC
  39 #define INTD    IRQ_IQ80332_INTD
  40
  41 //#define INTE  IRQ_IQ80332_I82544
  42
  43 static inline int __init
  44 iq80332_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
  45 {
  46         static int pci_irq_table[][8] = {
  47                 /*
  48                  * PCI IDSEL/INTPIN->INTLINE
  49                  * A       B       C       D
  50                  */
  51                 {-1,   -1,   -1,   -1},
  52                 {-1,   -1,   -1,   -1},
  53                 {-1,   -1,   -1,   -1},
  54                 {INTA, INTB, INTC, INTD}, /* PCI-X Slot */
  55                 {-1,   -1,   -1,   -1},
  56                 {INTC, INTC, INTC, INTC}, /* GigE  */
  57                 {-1,   -1,   -1,   -1},
  58                 {-1,   -1,   -1,   -1},
  59         };
  60
  61         BUG_ON(pin < 1 || pin > 4);
  62
  63         return PCI_IRQ_TABLE_LOOKUP(1, 7);
  64 }
  65
  66 static int iq80332_setup(int nr, struct pci_sys_data *sys)
  67 {
  68         struct resource *res;
  69
  70         if(nr != 0)
  71                 return 0;
  72
  73         res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
  74         if (!res)
  75                 panic("PCI: unable to alloc resources");
  76
  77         res[0].start = IOP331_PCI_LOWER_IO_VA;
  78         res[0].end   = IOP331_PCI_UPPER_IO_VA;
  79         res[0].name  = "IQ80332 PCI I/O Space";
  80         res[0].flags = IORESOURCE_IO;
  81
  82         res[1].start = IOP331_PCI_LOWER_MEM_PA;
  83         res[1].end   = IOP331_PCI_UPPER_MEM_PA;
  84         res[1].name  = "IQ80332 PCI Memory Space";
  85         res[1].flags = IORESOURCE_MEM;
  86
  87         request_resource(&ioport_resource, &res[0]);
  88         request_resource(&iomem_resource, &res[1]);
  89
  90         sys->mem_offset = IOP331_PCI_MEM_OFFSET;
  91         sys->io_offset  = IOP331_PCI_IO_OFFSET;
  92
  93         sys->resource[0] = &res[0];
  94         sys->resource[1] = &res[1];
  95         sys->resource[2] = NULL;
  96
  97         return 1;
  98 }
  99
 100 static void iq80332_preinit(void)
 101 {
 102         iop331_init();
 103 }
 104
 105 static struct hw_pci iq80332_pci __initdata = {
 106         .swizzle        = pci_std_swizzle,
 107         .nr_controllers = 1,
 108         .setup          = iq80332_setup,
 109         .scan           = iop331_scan_bus,
 110         .preinit        = iq80332_preinit,
 111         .map_irq        = iq80332_map_irq
 112 };
 113
 114 static int __init iq80332_pci_init(void)
 115 {
 116         if (machine_is_iq80332())
 117                 pci_common_init(&iq80332_pci);
 118         return 0;
 119 }
 120
 121 subsys_initcall(iq80332_pci_init);
 122
 123
 124
 125