* information.
*/
-#include <linux/device.h>
+#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/bootmem.h>
#include <linux/err.h>
+#include <linux/slab.h>
+
+#include "base.h"
+
+#define to_platform_driver(drv) (container_of((drv), struct platform_driver, driver))
struct device platform_bus = {
.bus_id = "platform",
};
+EXPORT_SYMBOL_GPL(platform_bus);
/**
* platform_get_resource - get a resource for a device
}
return NULL;
}
+EXPORT_SYMBOL_GPL(platform_get_resource);
/**
* platform_get_irq - get an IRQ for a device
{
struct resource *r = platform_get_resource(dev, IORESOURCE_IRQ, num);
- return r ? r->start : 0;
+ return r ? r->start : -ENXIO;
}
+EXPORT_SYMBOL_GPL(platform_get_irq);
/**
* platform_get_resource_byname - get a resource for a device by name
}
return NULL;
}
+EXPORT_SYMBOL_GPL(platform_get_resource_byname);
/**
* platform_get_irq - get an IRQ for a device
{
struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
- return r ? r->start : 0;
+ return r ? r->start : -ENXIO;
}
+EXPORT_SYMBOL_GPL(platform_get_irq_byname);
/**
* platform_add_devices - add a numbers of platform devices
return ret;
}
+EXPORT_SYMBOL_GPL(platform_add_devices);
+
+struct platform_object {
+ struct platform_device pdev;
+ char name[1];
+};
/**
- * platform_device_register - add a platform-level device
+ * platform_device_put
+ * @pdev: platform device to free
+ *
+ * Free all memory associated with a platform device. This function
+ * must _only_ be externally called in error cases. All other usage
+ * is a bug.
+ */
+void platform_device_put(struct platform_device *pdev)
+{
+ if (pdev)
+ put_device(&pdev->dev);
+}
+EXPORT_SYMBOL_GPL(platform_device_put);
+
+static void platform_device_release(struct device *dev)
+{
+ struct platform_object *pa = container_of(dev, struct platform_object, pdev.dev);
+
+ kfree(pa->pdev.dev.platform_data);
+ kfree(pa->pdev.resource);
+ kfree(pa);
+}
+
+/**
+ * platform_device_alloc
+ * @name: base name of the device we're adding
+ * @id: instance id
+ *
+ * Create a platform device object which can have other objects attached
+ * to it, and which will have attached objects freed when it is released.
+ */
+struct platform_device *platform_device_alloc(const char *name, unsigned int id)
+{
+ struct platform_object *pa;
+
+ pa = kzalloc(sizeof(struct platform_object) + strlen(name), GFP_KERNEL);
+ if (pa) {
+ strcpy(pa->name, name);
+ pa->pdev.name = pa->name;
+ pa->pdev.id = id;
+ device_initialize(&pa->pdev.dev);
+ pa->pdev.dev.release = platform_device_release;
+ }
+
+ return pa ? &pa->pdev : NULL;
+}
+EXPORT_SYMBOL_GPL(platform_device_alloc);
+
+/**
+ * platform_device_add_resources
+ * @pdev: platform device allocated by platform_device_alloc to add resources to
+ * @res: set of resources that needs to be allocated for the device
+ * @num: number of resources
+ *
+ * Add a copy of the resources to the platform device. The memory
+ * associated with the resources will be freed when the platform
+ * device is released.
+ */
+int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num)
+{
+ struct resource *r;
+
+ r = kmalloc(sizeof(struct resource) * num, GFP_KERNEL);
+ if (r) {
+ memcpy(r, res, sizeof(struct resource) * num);
+ pdev->resource = r;
+ pdev->num_resources = num;
+ }
+ return r ? 0 : -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(platform_device_add_resources);
+
+/**
+ * platform_device_add_data
+ * @pdev: platform device allocated by platform_device_alloc to add resources to
+ * @data: platform specific data for this platform device
+ * @size: size of platform specific data
+ *
+ * Add a copy of platform specific data to the platform device's platform_data
+ * pointer. The memory associated with the platform data will be freed
+ * when the platform device is released.
+ */
+int platform_device_add_data(struct platform_device *pdev, void *data, size_t size)
+{
+ void *d;
+
+ d = kmalloc(size, GFP_KERNEL);
+ if (d) {
+ memcpy(d, data, size);
+ pdev->dev.platform_data = d;
+ }
+ return d ? 0 : -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(platform_device_add_data);
+
+/**
+ * platform_device_add - add a platform device to device hierarchy
* @pdev: platform device we're adding
*
+ * This is part 2 of platform_device_register(), though may be called
+ * separately _iff_ pdev was allocated by platform_device_alloc().
*/
-int platform_device_register(struct platform_device * pdev)
+int platform_device_add(struct platform_device *pdev)
{
int i, ret = 0;
p = &ioport_resource;
}
- if (p && request_resource(p, r)) {
+ if (p && insert_resource(p, r)) {
printk(KERN_ERR
"%s: failed to claim resource %d\n",
pdev->dev.bus_id, i);
pr_debug("Registering platform device '%s'. Parent at %s\n",
pdev->dev.bus_id, pdev->dev.parent->bus_id);
- ret = device_register(&pdev->dev);
+ ret = device_add(&pdev->dev);
if (ret == 0)
return ret;
release_resource(&pdev->resource[i]);
return ret;
}
+EXPORT_SYMBOL_GPL(platform_device_add);
/**
- * platform_device_unregister - remove a platform-level device
+ * platform_device_del - remove a platform-level device
* @pdev: platform device we're removing
*
* Note that this function will also release all memory- and port-based
* resources owned by the device (@dev->resource).
*/
-void platform_device_unregister(struct platform_device * pdev)
+void platform_device_del(struct platform_device *pdev)
{
int i;
release_resource(r);
}
- device_unregister(&pdev->dev);
+ device_del(&pdev->dev);
}
}
+EXPORT_SYMBOL_GPL(platform_device_del);
-struct platform_object {
- struct platform_device pdev;
- struct resource resources[0];
-};
-
-static void platform_device_release_simple(struct device *dev)
+/**
+ * platform_device_register - add a platform-level device
+ * @pdev: platform device we're adding
+ *
+ */
+int platform_device_register(struct platform_device * pdev)
{
- struct platform_device *pdev = to_platform_device(dev);
+ device_initialize(&pdev->dev);
+ return platform_device_add(pdev);
+}
+EXPORT_SYMBOL_GPL(platform_device_register);
- kfree(container_of(pdev, struct platform_object, pdev));
+/**
+ * platform_device_unregister - unregister a platform-level device
+ * @pdev: platform device we're unregistering
+ *
+ * Unregistration is done in 2 steps. First we release all resources
+ * and remove it from the subsystem, then we drop reference count by
+ * calling platform_device_put().
+ */
+void platform_device_unregister(struct platform_device * pdev)
+{
+ platform_device_del(pdev);
+ platform_device_put(pdev);
}
+EXPORT_SYMBOL_GPL(platform_device_unregister);
/**
* platform_device_register_simple
struct platform_device *platform_device_register_simple(char *name, unsigned int id,
struct resource *res, unsigned int num)
{
- struct platform_object *pobj;
+ struct platform_device *pdev;
int retval;
- pobj = kzalloc(sizeof(*pobj) + sizeof(struct resource) * num, GFP_KERNEL);
- if (!pobj) {
+ pdev = platform_device_alloc(name, id);
+ if (!pdev) {
retval = -ENOMEM;
goto error;
}
- pobj->pdev.name = name;
- pobj->pdev.id = id;
- pobj->pdev.dev.release = platform_device_release_simple;
-
if (num) {
- memcpy(pobj->resources, res, sizeof(struct resource) * num);
- pobj->pdev.resource = pobj->resources;
- pobj->pdev.num_resources = num;
+ retval = platform_device_add_resources(pdev, res, num);
+ if (retval)
+ goto error;
}
- retval = platform_device_register(&pobj->pdev);
+ retval = platform_device_add(pdev);
if (retval)
goto error;
- return &pobj->pdev;
+ return pdev;
error:
- kfree(pobj);
+ platform_device_put(pdev);
return ERR_PTR(retval);
}
+EXPORT_SYMBOL_GPL(platform_device_register_simple);
+
+static int platform_drv_probe(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+
+ return drv->probe(dev);
+}
+
+static int platform_drv_remove(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+
+ return drv->remove(dev);
+}
+
+static void platform_drv_shutdown(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+
+ drv->shutdown(dev);
+}
+
+static int platform_drv_suspend(struct device *_dev, pm_message_t state)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+
+ return drv->suspend(dev, state);
+}
+
+static int platform_drv_resume(struct device *_dev)
+{
+ struct platform_driver *drv = to_platform_driver(_dev->driver);
+ struct platform_device *dev = to_platform_device(_dev);
+
+ return drv->resume(dev);
+}
+
+/**
+ * platform_driver_register
+ * @drv: platform driver structure
+ */
+int platform_driver_register(struct platform_driver *drv)
+{
+ drv->driver.bus = &platform_bus_type;
+ if (drv->probe)
+ drv->driver.probe = platform_drv_probe;
+ if (drv->remove)
+ drv->driver.remove = platform_drv_remove;
+ if (drv->shutdown)
+ drv->driver.shutdown = platform_drv_shutdown;
+ if (drv->suspend)
+ drv->driver.suspend = platform_drv_suspend;
+ if (drv->resume)
+ drv->driver.resume = platform_drv_resume;
+ return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(platform_driver_register);
+
+/**
+ * platform_driver_unregister
+ * @drv: platform driver structure
+ */
+void platform_driver_unregister(struct platform_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(platform_driver_unregister);
+
+
+/* modalias support enables more hands-off userspace setup:
+ * (a) environment variable lets new-style hotplug events work once system is
+ * fully running: "modprobe $MODALIAS"
+ * (b) sysfs attribute lets new-style coldplug recover from hotplug events
+ * mishandled before system is fully running: "modprobe $(cat modalias)"
+ */
+static ssize_t
+modalias_show(struct device *dev, struct device_attribute *a, char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ int len = snprintf(buf, PAGE_SIZE, "%s\n", pdev->name);
+
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+
+static struct device_attribute platform_dev_attrs[] = {
+ __ATTR_RO(modalias),
+ __ATTR_NULL,
+};
+
+static int platform_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ envp[0] = buffer;
+ snprintf(buffer, buffer_size, "MODALIAS=%s", pdev->name);
+ return 0;
+}
/**
return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0);
}
-static int platform_suspend(struct device * dev, pm_message_t state)
+static int platform_suspend(struct device *dev, pm_message_t mesg)
{
int ret = 0;
- if (dev->driver && dev->driver->suspend) {
- ret = dev->driver->suspend(dev, state, SUSPEND_DISABLE);
- if (ret == 0)
- ret = dev->driver->suspend(dev, state, SUSPEND_SAVE_STATE);
- if (ret == 0)
- ret = dev->driver->suspend(dev, state, SUSPEND_POWER_DOWN);
- }
+ if (dev->driver && dev->driver->suspend)
+ ret = dev->driver->suspend(dev, mesg);
+
+ return ret;
+}
+
+static int platform_suspend_late(struct device *dev, pm_message_t mesg)
+{
+ struct platform_driver *drv = to_platform_driver(dev->driver);
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ int ret = 0;
+
+ if (dev->driver && drv->suspend_late)
+ ret = drv->suspend_late(pdev, mesg);
+
+ return ret;
+}
+
+static int platform_resume_early(struct device *dev)
+{
+ struct platform_driver *drv = to_platform_driver(dev->driver);
+ struct platform_device *pdev = container_of(dev, struct platform_device, dev);
+ int ret = 0;
+
+ if (dev->driver && drv->resume_early)
+ ret = drv->resume_early(pdev);
+
return ret;
}
{
int ret = 0;
- if (dev->driver && dev->driver->resume) {
- ret = dev->driver->resume(dev, RESUME_POWER_ON);
- if (ret == 0)
- ret = dev->driver->resume(dev, RESUME_RESTORE_STATE);
- if (ret == 0)
- ret = dev->driver->resume(dev, RESUME_ENABLE);
- }
+ if (dev->driver && dev->driver->resume)
+ ret = dev->driver->resume(dev);
+
return ret;
}
struct bus_type platform_bus_type = {
.name = "platform",
+ .dev_attrs = platform_dev_attrs,
.match = platform_match,
+ .uevent = platform_uevent,
.suspend = platform_suspend,
+ .suspend_late = platform_suspend_late,
+ .resume_early = platform_resume_early,
.resume = platform_resume,
};
+EXPORT_SYMBOL_GPL(platform_bus_type);
int __init platform_bus_init(void)
{
}
EXPORT_SYMBOL_GPL(dma_get_required_mask);
#endif
-
-EXPORT_SYMBOL_GPL(platform_bus);
-EXPORT_SYMBOL_GPL(platform_bus_type);
-EXPORT_SYMBOL_GPL(platform_add_devices);
-EXPORT_SYMBOL_GPL(platform_device_register);
-EXPORT_SYMBOL_GPL(platform_device_register_simple);
-EXPORT_SYMBOL_GPL(platform_device_unregister);
-EXPORT_SYMBOL_GPL(platform_get_irq);
-EXPORT_SYMBOL_GPL(platform_get_resource);
-EXPORT_SYMBOL_GPL(platform_get_irq_byname);
-EXPORT_SYMBOL_GPL(platform_get_resource_byname);
git.openpandora.org / pandora-kernel.git / blobdiff