GUI: Fix Tomato RAF theme for all builds. Compilation typo.

[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / of / platform.c

/*
 *    Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
 *                       <benh@kernel.crashing.org>
 *    and                Arnd Bergmann, IBM Corp.
 *    Merged from powerpc/kernel/of_platform.c and
 *    sparc{,64}/kernel/of_device.c by Stephen Rothwell
 *
 *  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/errno.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>

static int of_dev_node_match(struct device *dev, void *data)
{
        return dev->of_node == data;
}

/**
 * of_find_device_by_node - Find the platform_device associated with a node
 * @np: Pointer to device tree node
 *
 * Returns platform_device pointer, or NULL if not found
 */
struct platform_device *of_find_device_by_node(struct device_node *np)
{
        struct device *dev;

        dev = bus_find_device(&platform_bus_type, NULL, np, of_dev_node_match);
        return dev ? to_platform_device(dev) : NULL;
}
EXPORT_SYMBOL(of_find_device_by_node);

static int platform_driver_probe_shim(struct platform_device *pdev)
{
        struct platform_driver *pdrv;
        struct of_platform_driver *ofpdrv;
        const struct of_device_id *match;

        pdrv = container_of(pdev->dev.driver, struct platform_driver, driver);
        ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver);

        /* There is an unlikely chance that an of_platform driver might match
         * on a non-OF platform device.  If so, then of_match_device() will
         * come up empty.  Return -EINVAL in this case so other drivers get
         * the chance to bind. */
        match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev);
        return match ? ofpdrv->probe(pdev, match) : -EINVAL;
}

static void platform_driver_shutdown_shim(struct platform_device *pdev)
{
        struct platform_driver *pdrv;
        struct of_platform_driver *ofpdrv;

        pdrv = container_of(pdev->dev.driver, struct platform_driver, driver);
        ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver);
        ofpdrv->shutdown(pdev);
}

/**
 * of_register_platform_driver
 */
int of_register_platform_driver(struct of_platform_driver *drv)
{
        char *of_name;

        /* setup of_platform_driver to platform_driver adaptors */
        drv->platform_driver.driver = drv->driver;

        /* Prefix the driver name with 'of:' to avoid namespace collisions
         * and bogus matches.  There are some drivers in the tree that
         * register both an of_platform_driver and a platform_driver with
         * the same name.  This is a temporary measure until they are all
         * cleaned up --gcl July 29, 2010 */
        of_name = kmalloc(strlen(drv->driver.name) + 5, GFP_KERNEL);
        if (!of_name)
                return -ENOMEM;
        sprintf(of_name, "of:%s", drv->driver.name);
        drv->platform_driver.driver.name = of_name;

        if (drv->probe)
                drv->platform_driver.probe = platform_driver_probe_shim;
        drv->platform_driver.remove = drv->remove;
        if (drv->shutdown)
                drv->platform_driver.shutdown = platform_driver_shutdown_shim;
        drv->platform_driver.suspend = drv->suspend;
        drv->platform_driver.resume = drv->resume;

        return platform_driver_register(&drv->platform_driver);
}
EXPORT_SYMBOL(of_register_platform_driver);

void of_unregister_platform_driver(struct of_platform_driver *drv)
{
        platform_driver_unregister(&drv->platform_driver);
        kfree(drv->platform_driver.driver.name);
        drv->platform_driver.driver.name = NULL;
}
EXPORT_SYMBOL(of_unregister_platform_driver);

#if defined(CONFIG_PPC_DCR)
#include <asm/dcr.h>
#endif

extern struct device_attribute of_platform_device_attrs[];

static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
{
        const struct of_device_id *matches = drv->of_match_table;

        if (!matches)
                return 0;

        return of_match_device(matches, dev) != NULL;
}

static int of_platform_device_probe(struct device *dev)
{
        int error = -ENODEV;
        struct of_platform_driver *drv;
        struct platform_device *of_dev;
        const struct of_device_id *match;

        drv = to_of_platform_driver(dev->driver);
        of_dev = to_platform_device(dev);

        if (!drv->probe)
                return error;

        of_dev_get(of_dev);

        match = of_match_device(drv->driver.of_match_table, dev);
        if (match)
                error = drv->probe(of_dev, match);
        if (error)
                of_dev_put(of_dev);

        return error;
}

static int of_platform_device_remove(struct device *dev)
{
        struct platform_device *of_dev = to_platform_device(dev);
        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);

        if (dev->driver && drv->remove)
                drv->remove(of_dev);
        return 0;
}

static void of_platform_device_shutdown(struct device *dev)
{
        struct platform_device *of_dev = to_platform_device(dev);
        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);

        if (dev->driver && drv->shutdown)
                drv->shutdown(of_dev);
}

#ifdef CONFIG_PM_SLEEP

static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg)
{
        struct platform_device *of_dev = to_platform_device(dev);
        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
        int ret = 0;

        if (dev->driver && drv->suspend)
                ret = drv->suspend(of_dev, mesg);
        return ret;
}

static int of_platform_legacy_resume(struct device *dev)
{
        struct platform_device *of_dev = to_platform_device(dev);
        struct of_platform_driver *drv = to_of_platform_driver(dev->driver);
        int ret = 0;

        if (dev->driver && drv->resume)
                ret = drv->resume(of_dev);
        return ret;
}

static int of_platform_pm_prepare(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (drv && drv->pm && drv->pm->prepare)
                ret = drv->pm->prepare(dev);

        return ret;
}

static void of_platform_pm_complete(struct device *dev)
{
        struct device_driver *drv = dev->driver;

        if (drv && drv->pm && drv->pm->complete)
                drv->pm->complete(dev);
}

#ifdef CONFIG_SUSPEND

static int of_platform_pm_suspend(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->suspend)
                        ret = drv->pm->suspend(dev);
        } else {
                ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND);
        }

        return ret;
}

static int of_platform_pm_suspend_noirq(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->suspend_noirq)
                        ret = drv->pm->suspend_noirq(dev);
        }

        return ret;
}

static int of_platform_pm_resume(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->resume)
                        ret = drv->pm->resume(dev);
        } else {
                ret = of_platform_legacy_resume(dev);
        }

        return ret;
}

static int of_platform_pm_resume_noirq(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->resume_noirq)
                        ret = drv->pm->resume_noirq(dev);
        }

        return ret;
}

#else /* !CONFIG_SUSPEND */

#define of_platform_pm_suspend          NULL
#define of_platform_pm_resume           NULL
#define of_platform_pm_suspend_noirq    NULL
#define of_platform_pm_resume_noirq     NULL

#endif /* !CONFIG_SUSPEND */

#ifdef CONFIG_HIBERNATION

static int of_platform_pm_freeze(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->freeze)
                        ret = drv->pm->freeze(dev);
        } else {
                ret = of_platform_legacy_suspend(dev, PMSG_FREEZE);
        }

        return ret;
}

static int of_platform_pm_freeze_noirq(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->freeze_noirq)
                        ret = drv->pm->freeze_noirq(dev);
        }

        return ret;
}

static int of_platform_pm_thaw(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->thaw)
                        ret = drv->pm->thaw(dev);
        } else {
                ret = of_platform_legacy_resume(dev);
        }

        return ret;
}

static int of_platform_pm_thaw_noirq(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->thaw_noirq)
                        ret = drv->pm->thaw_noirq(dev);
        }

        return ret;
}

static int of_platform_pm_poweroff(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->poweroff)
                        ret = drv->pm->poweroff(dev);
        } else {
                ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE);
        }

        return ret;
}

static int of_platform_pm_poweroff_noirq(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->poweroff_noirq)
                        ret = drv->pm->poweroff_noirq(dev);
        }

        return ret;
}

static int of_platform_pm_restore(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->restore)
                        ret = drv->pm->restore(dev);
        } else {
                ret = of_platform_legacy_resume(dev);
        }

        return ret;
}

static int of_platform_pm_restore_noirq(struct device *dev)
{
        struct device_driver *drv = dev->driver;
        int ret = 0;

        if (!drv)
                return 0;

        if (drv->pm) {
                if (drv->pm->restore_noirq)
                        ret = drv->pm->restore_noirq(dev);
        }

        return ret;
}

#else /* !CONFIG_HIBERNATION */

#define of_platform_pm_freeze           NULL
#define of_platform_pm_thaw             NULL
#define of_platform_pm_poweroff         NULL
#define of_platform_pm_restore          NULL
#define of_platform_pm_freeze_noirq     NULL
#define of_platform_pm_thaw_noirq               NULL
#define of_platform_pm_poweroff_noirq   NULL
#define of_platform_pm_restore_noirq    NULL

#endif /* !CONFIG_HIBERNATION */

static struct dev_pm_ops of_platform_dev_pm_ops = {
        .prepare = of_platform_pm_prepare,
        .complete = of_platform_pm_complete,
        .suspend = of_platform_pm_suspend,
        .resume = of_platform_pm_resume,
        .freeze = of_platform_pm_freeze,
        .thaw = of_platform_pm_thaw,
        .poweroff = of_platform_pm_poweroff,
        .restore = of_platform_pm_restore,
        .suspend_noirq = of_platform_pm_suspend_noirq,
        .resume_noirq = of_platform_pm_resume_noirq,
        .freeze_noirq = of_platform_pm_freeze_noirq,
        .thaw_noirq = of_platform_pm_thaw_noirq,
        .poweroff_noirq = of_platform_pm_poweroff_noirq,
        .restore_noirq = of_platform_pm_restore_noirq,
};

#define OF_PLATFORM_PM_OPS_PTR  (&of_platform_dev_pm_ops)

#else /* !CONFIG_PM_SLEEP */

#define OF_PLATFORM_PM_OPS_PTR  NULL

#endif /* !CONFIG_PM_SLEEP */

int of_bus_type_init(struct bus_type *bus, const char *name)
{
        bus->name = name;
        bus->match = of_platform_bus_match;
        bus->probe = of_platform_device_probe;
        bus->remove = of_platform_device_remove;
        bus->shutdown = of_platform_device_shutdown;
        bus->dev_attrs = of_platform_device_attrs;
        bus->pm = OF_PLATFORM_PM_OPS_PTR;
        return bus_register(bus);
}

int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
{
        /*
         * Temporary: of_platform_bus used to be distinct from the platform
         * bus.  It isn't anymore, and so drivers on the platform bus need
         * to be registered in a special way.
         *
         * After all of_platform_bus_type drivers are converted to
         * platform_drivers, this exception can be removed.
         */
        if (bus == &platform_bus_type)
                return of_register_platform_driver(drv);

        /* register with core */
        drv->driver.bus = bus;
        return driver_register(&drv->driver);
}
EXPORT_SYMBOL(of_register_driver);

void of_unregister_driver(struct of_platform_driver *drv)
{
        if (drv->driver.bus == &platform_bus_type)
                of_unregister_platform_driver(drv);
        else
                driver_unregister(&drv->driver);
}
EXPORT_SYMBOL(of_unregister_driver);

#if !defined(CONFIG_SPARC)
/*
 * The following routines scan a subtree and registers a device for
 * each applicable node.
 *
 * Note: sparc doesn't use these routines because it has a different
 * mechanism for creating devices from device tree nodes.
 */

/**
 * of_device_make_bus_id - Use the device node data to assign a unique name
 * @dev: pointer to device structure that is linked to a device tree node
 *
 * This routine will first try using either the dcr-reg or the reg property
 * value to derive a unique name.  As a last resort it will use the node
 * name followed by a unique number.
 */
void of_device_make_bus_id(struct device *dev)
{
        static atomic_t bus_no_reg_magic;
        struct device_node *node = dev->of_node;
        const u32 *reg;
        u64 addr;
        int magic;

#ifdef CONFIG_PPC_DCR
        /*
         * If it's a DCR based device, use 'd' for native DCRs
         * and 'D' for MMIO DCRs.
         */
        reg = of_get_property(node, "dcr-reg", NULL);
        if (reg) {
#ifdef CONFIG_PPC_DCR_NATIVE
                dev_set_name(dev, "d%x.%s", *reg, node->name);
#else /* CONFIG_PPC_DCR_NATIVE */
                u64 addr = of_translate_dcr_address(node, *reg, NULL);
                if (addr != OF_BAD_ADDR) {
                        dev_set_name(dev, "D%llx.%s",
                                     (unsigned long long)addr, node->name);
                        return;
                }
#endif /* !CONFIG_PPC_DCR_NATIVE */
        }
#endif /* CONFIG_PPC_DCR */

        /*
         * For MMIO, get the physical address
         */
        reg = of_get_property(node, "reg", NULL);
        if (reg) {
                addr = of_translate_address(node, reg);
                if (addr != OF_BAD_ADDR) {
                        dev_set_name(dev, "%llx.%s",
                                     (unsigned long long)addr, node->name);
                        return;
                }
        }

        /*
         * No BusID, use the node name and add a globally incremented
         * counter (and pray...)
         */
        magic = atomic_add_return(1, &bus_no_reg_magic);
        dev_set_name(dev, "%s.%d", node->name, magic - 1);
}

/**
 * of_device_alloc - Allocate and initialize an of_device
 * @np: device node to assign to device
 * @bus_id: Name to assign to the device.  May be null to use default name.
 * @parent: Parent device.
 */
struct platform_device *of_device_alloc(struct device_node *np,
                                  const char *bus_id,
                                  struct device *parent)
{
        struct platform_device *dev;
        int rc, i, num_reg = 0, num_irq = 0;
        struct resource *res, temp_res;

        /* First count how many resources are needed */
        while (of_address_to_resource(np, num_reg, &temp_res) == 0)
                num_reg++;
        while (of_irq_to_resource(np, num_irq, &temp_res) != NO_IRQ)
                num_irq++;

        /* Allocate memory for both the struct device and the resource table */
        dev = kzalloc(sizeof(*dev) + (sizeof(*res) * (num_reg + num_irq)),
                      GFP_KERNEL);
        if (!dev)
                return NULL;
        res = (struct resource *) &dev[1];

        /* Populate the resource table */
        if (num_irq || num_reg) {
                dev->num_resources = num_reg + num_irq;
                dev->resource = res;
                for (i = 0; i < num_reg; i++, res++) {
                        rc = of_address_to_resource(np, i, res);
                        WARN_ON(rc);
                }
                for (i = 0; i < num_irq; i++, res++) {
                        rc = of_irq_to_resource(np, i, res);
                        WARN_ON(rc == NO_IRQ);
                }
        }

        dev->dev.of_node = of_node_get(np);
#if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE)
        dev->dev.dma_mask = &dev->archdata.dma_mask;
#endif
        dev->dev.parent = parent;
        dev->dev.release = of_release_dev;

        if (bus_id)
                dev_set_name(&dev->dev, "%s", bus_id);
        else
                of_device_make_bus_id(&dev->dev);

        return dev;
}
EXPORT_SYMBOL(of_device_alloc);

/**
 * of_platform_device_create - Alloc, initialize and register an of_device
 * @np: pointer to node to create device for
 * @bus_id: name to assign device
 * @parent: Linux device model parent device.
 */
struct platform_device *of_platform_device_create(struct device_node *np,
                                            const char *bus_id,
                                            struct device *parent)
{
        struct platform_device *dev;

        dev = of_device_alloc(np, bus_id, parent);
        if (!dev)
                return NULL;

#if defined(CONFIG_PPC) || defined(CONFIG_MICROBLAZE)
        dev->archdata.dma_mask = 0xffffffffUL;
#endif
        dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
        dev->dev.bus = &platform_bus_type;

        /* We do not fill the DMA ops for platform devices by default.
         * This is currently the responsibility of the platform code
         * to do such, possibly using a device notifier
         */

        if (of_device_register(dev) != 0) {
                of_device_free(dev);
                return NULL;
        }

        return dev;
}
EXPORT_SYMBOL(of_platform_device_create);

/**
 * of_platform_bus_create - Create an OF device for a bus node and all its
 * children. Optionally recursively instantiate matching busses.
 * @bus: device node of the bus to instantiate
 * @matches: match table, NULL to use the default, OF_NO_DEEP_PROBE to
 * disallow recursive creation of child busses
 */
static int of_platform_bus_create(const struct device_node *bus,
                                  const struct of_device_id *matches,
                                  struct device *parent)
{
        struct device_node *child;
        struct platform_device *dev;
        int rc = 0;

        for_each_child_of_node(bus, child) {
                pr_debug("   create child: %s\n", child->full_name);
                dev = of_platform_device_create(child, NULL, parent);
                if (dev == NULL)
                        rc = -ENOMEM;
                else if (!of_match_node(matches, child))
                        continue;
                if (rc == 0) {
                        pr_debug("   and sub busses\n");
                        rc = of_platform_bus_create(child, matches, &dev->dev);
                }
                if (rc) {
                        of_node_put(child);
                        break;
                }
        }
        return rc;
}

/**
 * of_platform_bus_probe - Probe the device-tree for platform busses
 * @root: parent of the first level to probe or NULL for the root of the tree
 * @matches: match table, NULL to use the default
 * @parent: parent to hook devices from, NULL for toplevel
 *
 * Note that children of the provided root are not instantiated as devices
 * unless the specified root itself matches the bus list and is not NULL.
 */
int of_platform_bus_probe(struct device_node *root,
                          const struct of_device_id *matches,
                          struct device *parent)
{
        struct device_node *child;
        struct platform_device *dev;
        int rc = 0;

        if (WARN_ON(!matches || matches == OF_NO_DEEP_PROBE))
                return -EINVAL;
        if (root == NULL)
                root = of_find_node_by_path("/");
        else
                of_node_get(root);
        if (root == NULL)
                return -EINVAL;

        pr_debug("of_platform_bus_probe()\n");
        pr_debug(" starting at: %s\n", root->full_name);

        /* Do a self check of bus type, if there's a match, create
         * children
         */
        if (of_match_node(matches, root)) {
                pr_debug(" root match, create all sub devices\n");
                dev = of_platform_device_create(root, NULL, parent);
                if (dev == NULL) {
                        rc = -ENOMEM;
                        goto bail;
                }
                pr_debug(" create all sub busses\n");
                rc = of_platform_bus_create(root, matches, &dev->dev);
                goto bail;
        }
        for_each_child_of_node(root, child) {
                if (!of_match_node(matches, child))
                        continue;

                pr_debug("  match: %s\n", child->full_name);
                dev = of_platform_device_create(child, NULL, parent);
                if (dev == NULL)
                        rc = -ENOMEM;
                else
                        rc = of_platform_bus_create(child, matches, &dev->dev);
                if (rc) {
                        of_node_put(child);
                        break;
                }
        }
 bail:
        of_node_put(root);
        return rc;
}
EXPORT_SYMBOL(of_platform_bus_probe);
#endif /* !CONFIG_SPARC */