arch/sparc64/kernel/isa.c

   1 #include <linux/kernel.h>
   2 #include <linux/init.h>
   3 #include <linux/pci.h>
   4 #include <linux/slab.h>
   5 #include <asm/oplib.h>
   6 #include <asm/prom.h>
   7 #include <asm/of_device.h>
   8 #include <asm/isa.h>
   9
  10 struct sparc_isa_bridge *isa_chain;
  11
  12 static void __init fatal_err(const char *reason)
  13 {
  14         prom_printf("ISA: fatal error, %s.\n", reason);
  15 }
  16
  17 static void __init report_dev(struct sparc_isa_device *isa_dev, int child)
  18 {
  19         if (child)
  20                 printk(" (%s)", isa_dev->prom_node->name);
  21         else
  22                 printk(" [%s", isa_dev->prom_node->name);
  23 }
  24
  25 static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev)
  26 {
  27         struct linux_prom_registers *pregs;
  28         unsigned long base, len;
  29         int prop_len;
  30
  31         pregs = of_get_property(isa_dev->prom_node, "reg", &prop_len);
  32         if (!pregs)
  33                 return;
  34
  35         /* Only the first one is interesting. */
  36         len = pregs[0].reg_size;
  37         base = (((unsigned long)pregs[0].which_io << 32) |
  38                 (unsigned long)pregs[0].phys_addr);
  39         base += isa_dev->bus->parent->io_space.start;
  40
  41         isa_dev->resource.start = base;
  42         isa_dev->resource.end   = (base + len - 1UL);
  43         isa_dev->resource.flags = IORESOURCE_IO;
  44         isa_dev->resource.name  = isa_dev->prom_node->name;
  45
  46         request_resource(&isa_dev->bus->parent->io_space,
  47                          &isa_dev->resource);
  48 }
  49
  50 static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev)
  51 {
  52         struct of_device *op = of_find_device_by_node(isa_dev->prom_node);
  53
  54         if (!op || !op->num_irqs) {
  55                 isa_dev->irq = PCI_IRQ_NONE;
  56         } else {
  57                 isa_dev->irq = op->irqs[0];
  58         }
  59 }
  60
  61 static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
  62 {
  63         struct device_node *dp = parent_isa_dev->prom_node->child;
  64
  65         if (!dp)
  66                 return;
  67
  68         printk(" ->");
  69         while (dp) {
  70                 struct sparc_isa_device *isa_dev;
  71
  72                 isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
  73                 if (!isa_dev) {
  74                         fatal_err("cannot allocate child isa_dev");
  75                         prom_halt();
  76                 }
  77
  78                 /* Link it in to parent. */
  79                 isa_dev->next = parent_isa_dev->child;
  80                 parent_isa_dev->child = isa_dev;
  81
  82                 isa_dev->bus = parent_isa_dev->bus;
  83                 isa_dev->prom_node = dp;
  84
  85                 isa_dev_get_resource(isa_dev);
  86                 isa_dev_get_irq(isa_dev);
  87
  88                 report_dev(isa_dev, 1);
  89
  90                 dp = dp->sibling;
  91         }
  92 }
  93
  94 static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
  95 {
  96         struct device_node *dp = isa_br->prom_node->child;
  97
  98         while (dp) {
  99                 struct sparc_isa_device *isa_dev;
 100
 101                 isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
 102                 if (!isa_dev) {
 103                         printk(KERN_DEBUG "ISA: cannot allocate isa_dev");
 104                         return;
 105                 }
 106
 107                 isa_dev->ofdev.node = dp;
 108                 isa_dev->ofdev.dev.parent = &isa_br->ofdev.dev;
 109                 isa_dev->ofdev.dev.bus = &isa_bus_type;
 110                 sprintf(isa_dev->ofdev.dev.bus_id, "isa[%08x]", dp->node);
 111
 112                 /* Register with core */
 113                 if (of_device_register(&isa_dev->ofdev) != 0) {
 114                         printk(KERN_DEBUG "isa: device registration error for %s!\n",
 115                                dp->path_component_name);
 116                         kfree(isa_dev);
 117                         goto next_sibling;
 118                 }
 119
 120                 /* Link it in. */
 121                 isa_dev->next = NULL;
 122                 if (isa_br->devices == NULL) {
 123                         isa_br->devices = isa_dev;
 124                 } else {
 125                         struct sparc_isa_device *tmp = isa_br->devices;
 126
 127                         while (tmp->next)
 128                                 tmp = tmp->next;
 129
 130                         tmp->next = isa_dev;
 131                 }
 132
 133                 isa_dev->bus = isa_br;
 134                 isa_dev->prom_node = dp;
 135
 136                 isa_dev_get_resource(isa_dev);
 137                 isa_dev_get_irq(isa_dev);
 138
 139                 report_dev(isa_dev, 0);
 140
 141                 isa_fill_children(isa_dev);
 142
 143                 printk("]");
 144
 145         next_sibling:
 146                 dp = dp->sibling;
 147         }
 148 }
 149
 150 void __init isa_init(void)
 151 {
 152         struct pci_dev *pdev;
 153         unsigned short vendor, device;
 154         int index = 0;
 155
 156         vendor = PCI_VENDOR_ID_AL;
 157         device = PCI_DEVICE_ID_AL_M1533;
 158
 159         pdev = NULL;
 160         while ((pdev = pci_get_device(vendor, device, pdev)) != NULL) {
 161                 struct pcidev_cookie *pdev_cookie;
 162                 struct pci_pbm_info *pbm;
 163                 struct sparc_isa_bridge *isa_br;
 164                 struct device_node *dp;
 165
 166                 pdev_cookie = pdev->sysdata;
 167                 if (!pdev_cookie) {
 168                         printk("ISA: Warning, ISA bridge ignored due to "
 169                                "lack of OBP data.\n");
 170                         continue;
 171                 }
 172                 pbm = pdev_cookie->pbm;
 173                 dp = pdev_cookie->prom_node;
 174
 175                 isa_br = kzalloc(sizeof(*isa_br), GFP_KERNEL);
 176                 if (!isa_br) {
 177                         printk(KERN_DEBUG "isa: cannot allocate sparc_isa_bridge");
 178                         return;
 179                 }
 180
 181                 isa_br->ofdev.node = dp;
 182                 isa_br->ofdev.dev.parent = &pdev->dev;
 183                 isa_br->ofdev.dev.bus = &isa_bus_type;
 184                 sprintf(isa_br->ofdev.dev.bus_id, "isa%d", index);
 185
 186                 /* Register with core */
 187                 if (of_device_register(&isa_br->ofdev) != 0) {
 188                         printk(KERN_DEBUG "isa: device registration error for %s!\n",
 189                                dp->path_component_name);
 190                         kfree(isa_br);
 191                         return;
 192                 }
 193
 194                 /* Link it in. */
 195                 isa_br->next = isa_chain;
 196                 isa_chain = isa_br;
 197
 198                 isa_br->parent = pbm;
 199                 isa_br->self = pdev;
 200                 isa_br->index = index++;
 201                 isa_br->prom_node = pdev_cookie->prom_node;
 202
 203                 printk("isa%d:", isa_br->index);
 204
 205                 isa_fill_devices(isa_br);
 206
 207                 printk("\n");
 208         }
 209 }