1 files changed, 195 insertions, 0 deletions

diff --git a/arch/sh/kernel/cpu/bus.c b/arch/sh/kernel/cpu/bus.c
new file mode 100644
index 000000000000..ace82f4b4a59
--- /dev/null
+++ b/arch/sh/kernel/cpu/bus.c
@@ -0,0 +1,195 @@
+/*
+ * arch/sh/kernel/cpu/bus.c
+ *
+ * Virtual bus for SuperH.
+ *
+ * Copyright (C) 2004 Paul Mundt
+ *
+ * Shamelessly cloned from arch/arm/mach-omap/bus.c, which was written
+ * by:
+ *
+ *      Copyright (C) 2003 - 2004 Nokia Corporation
+ *      Written by Tony Lindgren <tony@atomide.com>
+ *      Portions of code based on sa1111.c.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <asm/bus-sh.h>
+
+static int sh_bus_match(struct device *dev, struct device_driver *drv)
+{
+        struct sh_driver *shdrv = to_sh_driver(drv);
+        struct sh_dev *shdev = to_sh_dev(dev);
+
+        return shdev->dev_id == shdrv->dev_id;
+}
+
+static int sh_bus_suspend(struct device *dev, u32 state)
+{
+        struct sh_dev *shdev = to_sh_dev(dev);
+        struct sh_driver *shdrv = to_sh_driver(dev->driver);
+
+        if (shdrv && shdrv->suspend)
+                return shdrv->suspend(shdev, state);
+
+        return 0;
+}
+
+static int sh_bus_resume(struct device *dev)
+{
+        struct sh_dev *shdev = to_sh_dev(dev);
+        struct sh_driver *shdrv = to_sh_driver(dev->driver);
+
+        if (shdrv && shdrv->resume)
+                return shdrv->resume(shdev);
+
+        return 0;
+}
+
+static struct device sh_bus_devices[SH_NR_BUSES] = {
+        {
+                .bus_id         = SH_BUS_NAME_VIRT,
+        },
+};
+
+struct bus_type sh_bus_types[SH_NR_BUSES] = {
+        {
+                .name           = SH_BUS_NAME_VIRT,
+                .match          = sh_bus_match,
+                .suspend        = sh_bus_suspend,
+                .resume         = sh_bus_resume,
+        },
+};
+
+static int sh_device_probe(struct device *dev)
+{
+        struct sh_dev *shdev = to_sh_dev(dev);
+        struct sh_driver *shdrv = to_sh_driver(dev->driver);
+
+        if (shdrv && shdrv->probe)
+                return shdrv->probe(shdev);
+
+        return -ENODEV;
+}
+
+static int sh_device_remove(struct device *dev)
+{
+        struct sh_dev *shdev = to_sh_dev(dev);
+        struct sh_driver *shdrv = to_sh_driver(dev->driver);
+
+        if (shdrv && shdrv->remove)
+                return shdrv->remove(shdev);
+
+        return 0;
+}
+
+int sh_device_register(struct sh_dev *dev)
+{
+        if (!dev)
+                return -EINVAL;
+
+        if (dev->bus_id < 0 || dev->bus_id >= SH_NR_BUSES) {
+                printk(KERN_ERR "%s: bus_id invalid: %s bus: %d\n",
+                       __FUNCTION__, dev->name, dev->bus_id);
+                return -EINVAL;
+        }
+
+        dev->dev.parent = &sh_bus_devices[dev->bus_id];
+        dev->dev.bus    = &sh_bus_types[dev->bus_id];
+
+        /* This is needed for USB OHCI to work */
+        if (dev->dma_mask)
+                dev->dev.dma_mask = dev->dma_mask;
+
+        snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%s%u",
+                 dev->name, dev->dev_id);
+
+        printk(KERN_INFO "Registering SH device '%s'. Parent at %s\n",
+               dev->dev.bus_id, dev->dev.parent->bus_id);
+
+        return device_register(&dev->dev);
+}
+
+void sh_device_unregister(struct sh_dev *dev)
+{
+        device_unregister(&dev->dev);
+}
+
+int sh_driver_register(struct sh_driver *drv)
+{
+        if (!drv)
+                return -EINVAL;
+
+        if (drv->bus_id < 0 || drv->bus_id >= SH_NR_BUSES) {
+                printk(KERN_ERR "%s: bus_id invalid: bus: %d device %d\n",
+                       __FUNCTION__, drv->bus_id, drv->dev_id);
+                return -EINVAL;
+        }
+
+        drv->drv.probe  = sh_device_probe;
+        drv->drv.remove = sh_device_remove;
+        drv->drv.bus    = &sh_bus_types[drv->bus_id];
+
+        return driver_register(&drv->drv);
+}
+
+void sh_driver_unregister(struct sh_driver *drv)
+{
+        driver_unregister(&drv->drv);
+}
+
+static int __init sh_bus_init(void)
+{
+        int i, ret = 0;
+
+        for (i = 0; i < SH_NR_BUSES; i++) {
+                ret = device_register(&sh_bus_devices[i]);
+                if (ret != 0) {
+                        printk(KERN_ERR "Unable to register bus device %s\n",
+                               sh_bus_devices[i].bus_id);
+                        continue;
+                }
+
+                ret = bus_register(&sh_bus_types[i]);
+                if (ret != 0) {
+                        printk(KERN_ERR "Unable to register bus %s\n",
+                               sh_bus_types[i].name);
+                        device_unregister(&sh_bus_devices[i]);
+                }
+        }
+
+        printk(KERN_INFO "SH Virtual Bus initialized\n");
+
+        return ret;
+}
+
+static void __exit sh_bus_exit(void)
+{
+        int i;
+
+        for (i = 0; i < SH_NR_BUSES; i++) {
+                bus_unregister(&sh_bus_types[i]);
+                device_unregister(&sh_bus_devices[i]);
+        }
+}
+
+module_init(sh_bus_init);
+module_exit(sh_bus_exit);
+
+MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");
+MODULE_DESCRIPTION("SH Virtual Bus");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(sh_bus_types);
+EXPORT_SYMBOL(sh_device_register);
+EXPORT_SYMBOL(sh_device_unregister);
+EXPORT_SYMBOL(sh_driver_register);
+EXPORT_SYMBOL(sh_driver_unregister);
+