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 of_device *op = of_find_device_by_node(isa_dev->prom_node);
  28
  29         memcpy(&isa_dev->resource, &op->resource[0], sizeof(struct resource));
  30 }
  31
  32 static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev)
  33 {
  34         struct of_device *op = of_find_device_by_node(isa_dev->prom_node);
  35
  36         if (!op || !op->num_irqs) {
  37                 isa_dev->irq = PCI_IRQ_NONE;
  38         } else {
  39                 isa_dev->irq = op->irqs[0];
  40         }
  41 }
  42
  43 static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
  44 {
  45         struct device_node *dp = parent_isa_dev->prom_node->child;
  46
  47         if (!dp)
  48                 return;
  49
  50         printk(" ->");
  51         while (dp) {
  52                 struct sparc_isa_device *isa_dev;
  53
  54                 isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
  55                 if (!isa_dev) {
  56                         fatal_err("cannot allocate child isa_dev");
  57                         prom_halt();
  58                 }
  59
  60                 /* Link it in to parent. */
  61                 isa_dev->next = parent_isa_dev->child;
  62                 parent_isa_dev->child = isa_dev;
  63
  64                 isa_dev->bus = parent_isa_dev->bus;
  65                 isa_dev->prom_node = dp;
  66
  67                 isa_dev_get_resource(isa_dev);
  68                 isa_dev_get_irq(isa_dev);
  69
  70                 report_dev(isa_dev, 1);
  71
  72                 dp = dp->sibling;
  73         }
  74 }
  75
  76 static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
  77 {
  78         struct device_node *dp = isa_br->prom_node->child;
  79
  80         while (dp) {
  81                 struct sparc_isa_device *isa_dev;
  82                 struct dev_archdata *sd;
  83
  84                 isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
  85                 if (!isa_dev) {
  86                         printk(KERN_DEBUG "ISA: cannot allocate isa_dev");
  87                         return;
  88                 }
  89
  90                 sd = &isa_dev->ofdev.dev.archdata;
  91                 sd->prom_node = dp;
  92                 sd->op = &isa_dev->ofdev;
  93                 sd->iommu = isa_br->ofdev.dev.parent->archdata.iommu;
  94                 sd->stc = isa_br->ofdev.dev.parent->archdata.stc;
  95
  96                 isa_dev->ofdev.node = dp;
  97                 isa_dev->ofdev.dev.parent = &isa_br->ofdev.dev;
  98                 isa_dev->ofdev.dev.bus = &isa_bus_type;
  99                 sprintf(isa_dev->ofdev.dev.bus_id, "isa[%08x]", dp->node);
 100
 101                 /* Register with core */
 102                 if (of_device_register(&isa_dev->ofdev) != 0) {
 103                         printk(KERN_DEBUG "isa: device registration error for %s!\n",
 104                                dp->path_component_name);
 105                         kfree(isa_dev);
 106                         goto next_sibling;
 107                 }
 108
 109                 /* Link it in. */
 110                 isa_dev->next = NULL;
 111                 if (isa_br->devices == NULL) {
 112                         isa_br->devices = isa_dev;
 113                 } else {
 114                         struct sparc_isa_device *tmp = isa_br->devices;
 115
 116                         while (tmp->next)
 117                                 tmp = tmp->next;
 118
 119                         tmp->next = isa_dev;
 120                 }
 121
 122                 isa_dev->bus = isa_br;
 123                 isa_dev->prom_node = dp;
 124
 125                 isa_dev_get_resource(isa_dev);
 126                 isa_dev_get_irq(isa_dev);
 127
 128                 report_dev(isa_dev, 0);
 129
 130                 isa_fill_children(isa_dev);
 131
 132                 printk("]");
 133
 134         next_sibling:
 135                 dp = dp->sibling;
 136         }
 137 }
 138
 139 void __init isa_init(void)
 140 {
 141         struct pci_dev *pdev;
 142         unsigned short vendor, device;
 143         int index = 0;
 144
 145         vendor = PCI_VENDOR_ID_AL;
 146         device = PCI_DEVICE_ID_AL_M1533;
 147
 148         pdev = NULL;
 149         while ((pdev = pci_get_device(vendor, device, pdev)) != NULL) {
 150                 struct sparc_isa_bridge *isa_br;
 151                 struct device_node *dp;
 152
 153                 dp = pci_device_to_OF_node(pdev);
 154
 155                 isa_br = kzalloc(sizeof(*isa_br), GFP_KERNEL);
 156                 if (!isa_br) {
 157                         printk(KERN_DEBUG "isa: cannot allocate sparc_isa_bridge");
 158                         return;
 159                 }
 160
 161                 isa_br->ofdev.node = dp;
 162                 isa_br->ofdev.dev.parent = &pdev->dev;
 163                 isa_br->ofdev.dev.bus = &isa_bus_type;
 164                 sprintf(isa_br->ofdev.dev.bus_id, "isa%d", index);
 165
 166                 /* Register with core */
 167                 if (of_device_register(&isa_br->ofdev) != 0) {
 168                         printk(KERN_DEBUG "isa: device registration error for %s!\n",
 169                                dp->path_component_name);
 170                         kfree(isa_br);
 171                         return;
 172                 }
 173
 174                 /* Link it in. */
 175                 isa_br->next = isa_chain;
 176                 isa_chain = isa_br;
 177
 178                 isa_br->self = pdev;
 179                 isa_br->index = index++;
 180                 isa_br->prom_node = dp;
 181
 182                 printk("isa%d:", isa_br->index);
 183
 184                 isa_fill_devices(isa_br);
 185
 186                 printk("\n");
 187         }
 188 }