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 struct linux_prom_registers * __init
  26 isa_dev_get_resource(struct sparc_isa_device *isa_dev)
  27 {
  28         struct linux_prom_registers *pregs;
  29         unsigned long base, len;
  30         int prop_len;
  31
  32         pregs = of_get_property(isa_dev->prom_node, "reg", &prop_len);
  33
  34         /* Only the first one is interesting. */
  35         len = pregs[0].reg_size;
  36         base = (((unsigned long)pregs[0].which_io << 32) |
  37                 (unsigned long)pregs[0].phys_addr);
  38         base += isa_dev->bus->parent->io_space.start;
  39
  40         isa_dev->resource.start = base;
  41         isa_dev->resource.end   = (base + len - 1UL);
  42         isa_dev->resource.flags = IORESOURCE_IO;
  43         isa_dev->resource.name  = isa_dev->prom_node->name;
  44
  45         request_resource(&isa_dev->bus->parent->io_space,
  46                          &isa_dev->resource);
  47
  48         return pregs;
  49 }
  50
  51 static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev,
  52                                    struct linux_prom_registers *pregs)
  53 {
  54         struct of_device *op = of_find_device_by_node(isa_dev->prom_node);
  55
  56         if (!op || !op->num_irqs) {
  57                 isa_dev->irq = PCI_IRQ_NONE;
  58         } else {
  59                 isa_dev->irq = op->irqs[0];
  60         }
  61 }
  62
  63 static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
  64 {
  65         struct device_node *dp = parent_isa_dev->prom_node->child;
  66
  67         if (!dp)
  68                 return;
  69
  70         printk(" ->");
  71         while (dp) {
  72                 struct linux_prom_registers *regs;
  73                 struct sparc_isa_device *isa_dev;
  74
  75                 isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
  76                 if (!isa_dev) {
  77                         fatal_err("cannot allocate child isa_dev");
  78                         prom_halt();
  79                 }
  80
  81                 /* Link it in to parent. */
  82                 isa_dev->next = parent_isa_dev->child;
  83                 parent_isa_dev->child = isa_dev;
  84
  85                 isa_dev->bus = parent_isa_dev->bus;
  86                 isa_dev->prom_node = dp;
  87
  88                 regs = isa_dev_get_resource(isa_dev);
  89                 isa_dev_get_irq(isa_dev, regs);
  90
  91                 report_dev(isa_dev, 1);
  92
  93                 dp = dp->sibling;
  94         }
  95 }
  96
  97 static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
  98 {
  99         struct device_node *dp = isa_br->prom_node->child;
 100
 101         while (dp) {
 102                 struct linux_prom_registers *regs;
 103                 struct sparc_isa_device *isa_dev;
 104
 105                 isa_dev = kzalloc(sizeof(*isa_dev), GFP_KERNEL);
 106                 if (!isa_dev) {
 107                         printk(KERN_DEBUG "ISA: cannot allocate isa_dev");
 108                         return;
 109                 }
 110
 111                 isa_dev->ofdev.node = dp;
 112                 isa_dev->ofdev.dev.parent = &isa_br->ofdev.dev;
 113                 isa_dev->ofdev.dev.bus = &isa_bus_type;
 114                 sprintf(isa_dev->ofdev.dev.bus_id, "isa[%08x]", dp->node);
 115
 116                 /* Register with core */
 117                 if (of_device_register(&isa_dev->ofdev) != 0) {
 118                         printk(KERN_DEBUG "isa: device registration error for %s!\n",
 119                                dp->path_component_name);
 120                         kfree(isa_dev);
 121                         goto next_sibling;
 122                 }
 123
 124                 /* Link it in. */
 125                 isa_dev->next = NULL;
 126                 if (isa_br->devices == NULL) {
 127                         isa_br->devices = isa_dev;
 128                 } else {
 129                         struct sparc_isa_device *tmp = isa_br->devices;
 130
 131                         while (tmp->next)
 132                                 tmp = tmp->next;
 133
 134                         tmp->next = isa_dev;
 135                 }
 136
 137                 isa_dev->bus = isa_br;
 138                 isa_dev->prom_node = dp;
 139
 140                 regs = isa_dev_get_resource(isa_dev);
 141                 isa_dev_get_irq(isa_dev, regs);
 142
 143                 report_dev(isa_dev, 0);
 144
 145                 isa_fill_children(isa_dev);
 146
 147                 printk("]");
 148
 149         next_sibling:
 150                 dp = dp->sibling;
 151         }
 152 }
 153
 154 void __init isa_init(void)
 155 {
 156         struct pci_dev *pdev;
 157         unsigned short vendor, device;
 158         int index = 0;
 159
 160         vendor = PCI_VENDOR_ID_AL;
 161         device = PCI_DEVICE_ID_AL_M1533;
 162
 163         pdev = NULL;
 164         while ((pdev = pci_get_device(vendor, device, pdev)) != NULL) {
 165                 struct pcidev_cookie *pdev_cookie;
 166                 struct pci_pbm_info *pbm;
 167                 struct sparc_isa_bridge *isa_br;
 168                 struct device_node *dp;
 169
 170                 pdev_cookie = pdev->sysdata;
 171                 if (!pdev_cookie) {
 172                         printk("ISA: Warning, ISA bridge ignored due to "
 173                                "lack of OBP data.\n");
 174                         continue;
 175                 }
 176                 pbm = pdev_cookie->pbm;
 177                 dp = pdev_cookie->prom_node;
 178
 179                 isa_br = kzalloc(sizeof(*isa_br), GFP_KERNEL);
 180                 if (!isa_br) {
 181                         printk(KERN_DEBUG "isa: cannot allocate sparc_isa_bridge");
 182                         return;
 183                 }
 184
 185                 isa_br->ofdev.node = dp;
 186                 isa_br->ofdev.dev.parent = &pdev->dev;
 187                 isa_br->ofdev.dev.bus = &isa_bus_type;
 188                 sprintf(isa_br->ofdev.dev.bus_id, "isa%d", index);
 189
 190                 /* Register with core */
 191                 if (of_device_register(&isa_br->ofdev) != 0) {
 192                         printk(KERN_DEBUG "isa: device registration error for %s!\n",
 193                                dp->path_component_name);
 194                         kfree(isa_br);
 195                         return;
 196                 }
 197
 198                 /* Link it in. */
 199                 isa_br->next = isa_chain;
 200                 isa_chain = isa_br;
 201
 202                 isa_br->parent = pbm;
 203                 isa_br->self = pdev;
 204                 isa_br->index = index++;
 205                 isa_br->prom_node = pdev_cookie->prom_node;
 206
 207                 printk("isa%d:", isa_br->index);
 208
 209                 isa_fill_devices(isa_br);
 210
 211                 printk("\n");
 212         }
 213 }