hw/versatile_pci.c

   1 /*
   2  * ARM Versatile/PB PCI host controller
   3  *
   4  * Copyright (c) 2006-2009 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the LGPL.
   8  */
   9
  10 #include "sysbus.h"
  11 #include "pci.h"
  12 #include "pci_host.h"
  13
  14 typedef struct {
  15     SysBusDevice busdev;
  16     qemu_irq irq[4];
  17     int realview;
  18     int mem_config;
  19 } PCIVPBState;
  20
  21 static inline uint32_t vpb_pci_config_addr(target_phys_addr_t addr)
  22 {
  23     return addr & 0xffffff;
  24 }
  25
  26 static void pci_vpb_config_writeb (void *opaque, target_phys_addr_t addr,
  27                                    uint32_t val)
  28 {
  29     pci_data_write(opaque, vpb_pci_config_addr (addr), val, 1);
  30 }
  31
  32 static void pci_vpb_config_writew (void *opaque, target_phys_addr_t addr,
  33                                    uint32_t val)
  34 {
  35 #ifdef TARGET_WORDS_BIGENDIAN
  36     val = bswap16(val);
  37 #endif
  38     pci_data_write(opaque, vpb_pci_config_addr (addr), val, 2);
  39 }
  40
  41 static void pci_vpb_config_writel (void *opaque, target_phys_addr_t addr,
  42                                    uint32_t val)
  43 {
  44 #ifdef TARGET_WORDS_BIGENDIAN
  45     val = bswap32(val);
  46 #endif
  47     pci_data_write(opaque, vpb_pci_config_addr (addr), val, 4);
  48 }
  49
  50 static uint32_t pci_vpb_config_readb (void *opaque, target_phys_addr_t addr)
  51 {
  52     uint32_t val;
  53     val = pci_data_read(opaque, vpb_pci_config_addr (addr), 1);
  54     return val;
  55 }
  56
  57 static uint32_t pci_vpb_config_readw (void *opaque, target_phys_addr_t addr)
  58 {
  59     uint32_t val;
  60     val = pci_data_read(opaque, vpb_pci_config_addr (addr), 2);
  61 #ifdef TARGET_WORDS_BIGENDIAN
  62     val = bswap16(val);
  63 #endif
  64     return val;
  65 }
  66
  67 static uint32_t pci_vpb_config_readl (void *opaque, target_phys_addr_t addr)
  68 {
  69     uint32_t val;
  70     val = pci_data_read(opaque, vpb_pci_config_addr (addr), 4);
  71 #ifdef TARGET_WORDS_BIGENDIAN
  72     val = bswap32(val);
  73 #endif
  74     return val;
  75 }
  76
  77 static CPUWriteMemoryFunc * const pci_vpb_config_write[] = {
  78     &pci_vpb_config_writeb,
  79     &pci_vpb_config_writew,
  80     &pci_vpb_config_writel,
  81 };
  82
  83 static CPUReadMemoryFunc * const pci_vpb_config_read[] = {
  84     &pci_vpb_config_readb,
  85     &pci_vpb_config_readw,
  86     &pci_vpb_config_readl,
  87 };
  88
  89 static int pci_vpb_map_irq(PCIDevice *d, int irq_num)
  90 {
  91     return irq_num;
  92 }
  93
  94 static void pci_vpb_set_irq(void *opaque, int irq_num, int level)
  95 {
  96     qemu_irq *pic = opaque;
  97
  98     qemu_set_irq(pic[irq_num], level);
  99 }
 100
 101 static void pci_vpb_map(SysBusDevice *dev, target_phys_addr_t base)
 102 {
 103     PCIVPBState *s = (PCIVPBState *)dev;
 104     /* Selfconfig area.  */
 105     cpu_register_physical_memory(base + 0x01000000, 0x1000000, s->mem_config);
 106     /* Normal config area.  */
 107     cpu_register_physical_memory(base + 0x02000000, 0x1000000, s->mem_config);
 108
 109     if (s->realview) {
 110         /* IO memory area.  */
 111         isa_mmio_init(base + 0x03000000, 0x00100000);
 112     }
 113 }
 114
 115 static int pci_vpb_init(SysBusDevice *dev)
 116 {
 117     PCIVPBState *s = FROM_SYSBUS(PCIVPBState, dev);
 118     PCIBus *bus;
 119     int i;
 120
 121     for (i = 0; i < 4; i++) {
 122         sysbus_init_irq(dev, &s->irq[i]);
 123     }
 124     bus = pci_register_bus(&dev->qdev, "pci",
 125                            pci_vpb_set_irq, pci_vpb_map_irq, s->irq,
 126                            11 << 3, 4);
 127
 128     /* ??? Register memory space.  */
 129
 130     s->mem_config = cpu_register_io_memory(pci_vpb_config_read,
 131                                            pci_vpb_config_write, bus);
 132     sysbus_init_mmio_cb(dev, 0x04000000, pci_vpb_map);
 133
 134     pci_create_simple(bus, -1, "versatile_pci_host");
 135     return 0;
 136 }
 137
 138 static int pci_realview_init(SysBusDevice *dev)
 139 {
 140     PCIVPBState *s = FROM_SYSBUS(PCIVPBState, dev);
 141     s->realview = 1;
 142     return pci_vpb_init(dev);
 143 }
 144
 145 static int versatile_pci_host_init(PCIDevice *d)
 146 {
 147     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_XILINX);
 148     /* Both boards have the same device ID.  Oh well.  */
 149     pci_config_set_device_id(d->config, PCI_DEVICE_ID_XILINX_XC2VP30);
 150     pci_set_word(d->config + PCI_STATUS,
 151                  PCI_STATUS_66MHZ | PCI_STATUS_DEVSEL_MEDIUM);
 152     pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_CO);
 153     pci_set_byte(d->config + PCI_LATENCY_TIMER, 0x10);
 154     return 0;
 155 }
 156
 157 static PCIDeviceInfo versatile_pci_host_info = {
 158     .qdev.name = "versatile_pci_host",
 159     .qdev.size = sizeof(PCIDevice),
 160     .init      = versatile_pci_host_init,
 161 };
 162
 163 static void versatile_pci_register_devices(void)
 164 {
 165     sysbus_register_dev("versatile_pci", sizeof(PCIVPBState), pci_vpb_init);
 166     sysbus_register_dev("realview_pci", sizeof(PCIVPBState),
 167                         pci_realview_init);
 168     pci_qdev_register(&versatile_pci_host_info);
 169 }
 170
 171 device_init(versatile_pci_register_devices)