arch/arm/mach-iop33x/iq80332-pci.c

   1 /*
   2  * arch/arm/mach-iop33x/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 struct hw_pci iq80332_pci __initdata = {
  67         .swizzle        = pci_std_swizzle,
  68         .nr_controllers = 1,
  69         .setup          = iop3xx_pci_setup,
  70         .scan           = iop3xx_pci_scan_bus,
  71         .preinit        = iop3xx_pci_preinit,
  72         .map_irq        = iq80332_map_irq
  73 };
  74
  75 static int __init iq80332_pci_init(void)
  76 {
  77         if (machine_is_iq80332())
  78                 pci_common_init(&iq80332_pci);
  79         return 0;
  80 }
  81
  82 subsys_initcall(iq80332_pci_init);
  83
  84
  85
  86