[PATCH] superhyway: multiple block support and VCR rework

[pandora-kernel.git] / drivers / sh / superhyway / superhyway.c

diff --git a/drivers/sh/superhyway/superhyway.c b/drivers/sh/superhyway/superhyway.c
index 28757cb..7bdab2a 100644 (file)
--- a/drivers/sh/superhyway/superhyway.c
+++ b/drivers/sh/superhyway/superhyway.c
@@ -27,19 +27,20 @@ static struct device superhyway_bus_device = {
 
 static void superhyway_device_release(struct device *dev)
 {
-       kfree(to_superhyway_device(dev));
+       struct superhyway_device *sdev = to_superhyway_device(dev);
+
+       kfree(sdev->resource);
+       kfree(sdev);
 }
 
 /**
  * superhyway_add_device - Add a SuperHyway module
- * @mod_id: Module ID (taken from MODULE.VCR.MOD_ID).
  * @base: Physical address where module is mapped.
- * @vcr: VCR value.
+ * @sdev: SuperHyway device to add, or NULL to allocate a new one.
+ * @bus: Bus where SuperHyway module resides.
  *
  * This is responsible for adding a new SuperHyway module. This sets up a new
- * struct superhyway_device for the module being added. Each one of @mod_id,
- * @base, and @vcr are registered with the new device for further use
- * elsewhere.
+ * struct superhyway_device for the module being added if @sdev == NULL.
  *
  * Devices are initially added in the order that they are scanned (from the
  * top-down of the memory map), and are assigned an ID based on the order that
@@ -49,28 +50,40 @@ static void superhyway_device_release(struct device *dev)
  * Further work can and should be done in superhyway_scan_bus(), to be sure
  * that any new modules are properly discovered and subsequently registered.
  */
-int superhyway_add_device(unsigned int mod_id, unsigned long base,
-                         unsigned long long vcr)
+int superhyway_add_device(unsigned long base, struct superhyway_device *sdev,
+                         struct superhyway_bus *bus)
 {
-       struct superhyway_device *dev;
+       struct superhyway_device *dev = sdev;
+
+       if (!dev) {
+               dev = kmalloc(sizeof(struct superhyway_device), GFP_KERNEL);
+               if (!dev)
+                       return -ENOMEM;
 
-       dev = kmalloc(sizeof(struct superhyway_device), GFP_KERNEL);
-       if (!dev)
-               return -ENOMEM;
+               memset(dev, 0, sizeof(struct superhyway_device));
+       }
 
-       memset(dev, 0, sizeof(struct superhyway_device));
+       dev->bus = bus;
+       superhyway_read_vcr(dev, base, &dev->vcr);
 
-       dev->id.id = mod_id;
-       sprintf(dev->name, "SuperHyway device %04x", dev->id.id);
+       if (!dev->resource) {
+               dev->resource = kmalloc(sizeof(struct resource), GFP_KERNEL);
+               if (!dev->resource) {
+                       kfree(dev);
+                       return -ENOMEM;
+               }
+
+               dev->resource->name     = dev->name;
+               dev->resource->start    = base;
+               dev->resource->end      = dev->resource->start + 0x01000000;
+       }
 
-       dev->vcr                = *((struct vcr_info *)(&vcr));
-       dev->resource.name      = dev->name;
-       dev->resource.start     = base;
-       dev->resource.end       = dev->resource.start + 0x01000000;
        dev->dev.parent         = &superhyway_bus_device;
        dev->dev.bus            = &superhyway_bus_type;
        dev->dev.release        = superhyway_device_release;
+       dev->id.id              = dev->vcr.mod_id;
 
+       sprintf(dev->name, "SuperHyway device %04x", dev->id.id);
        sprintf(dev->dev.bus_id, "%02x", superhyway_devices);
 
        superhyway_devices++;
@@ -78,10 +91,31 @@ int superhyway_add_device(unsigned int mod_id, unsigned long base,
        return device_register(&dev->dev);
 }
 
+int superhyway_add_devices(struct superhyway_bus *bus,
+                          struct superhyway_device **devices,
+                          int nr_devices)
+{
+       int i, ret = 0;
+
+       for (i = 0; i < nr_devices; i++) {
+               struct superhyway_device *dev = devices[i];
+               ret |= superhyway_add_device(dev->resource[0].start, dev, bus);
+       }
+
+       return ret;
+}
+
 static int __init superhyway_init(void)
 {
+       struct superhyway_bus *bus;
+       int ret = 0;
+
        device_register(&superhyway_bus_device);
-       return superhyway_scan_bus();
+
+       for (bus = superhyway_channels; bus->ops; bus++)
+               ret |= superhyway_scan_bus(bus);
+
+       return ret;
 }
 
 postcore_initcall(superhyway_init);
@@ -197,6 +231,7 @@ module_exit(superhyway_bus_exit);
 
 EXPORT_SYMBOL(superhyway_bus_type);
 EXPORT_SYMBOL(superhyway_add_device);
+EXPORT_SYMBOL(superhyway_add_devices);
 EXPORT_SYMBOL(superhyway_register_driver);
 EXPORT_SYMBOL(superhyway_unregister_driver);