#include "base.h"
-#define to_platform_driver(drv) (container_of((drv), struct platform_driver, driver))
+#define to_platform_driver(drv) (container_of((drv), struct platform_driver, \
+ driver))
struct device platform_bus = {
- .bus_id = "platform",
+ .init_name = "platform",
};
+EXPORT_SYMBOL_GPL(platform_bus);
/**
- * platform_get_resource - get a resource for a device
- * @dev: platform device
- * @type: resource type
- * @num: resource index
+ * platform_get_resource - get a resource for a device
+ * @dev: platform device
+ * @type: resource type
+ * @num: resource index
*/
-struct resource *
-platform_get_resource(struct platform_device *dev, unsigned int type,
- unsigned int num)
+struct resource *platform_get_resource(struct platform_device *dev,
+ unsigned int type, unsigned int num)
{
int i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
- if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM|
- IORESOURCE_IRQ|IORESOURCE_DMA))
- == type)
- if (num-- == 0)
- return r;
+ if (type == resource_type(r) && num-- == 0)
+ return r;
}
return NULL;
}
+EXPORT_SYMBOL_GPL(platform_get_resource);
/**
- * platform_get_irq - get an IRQ for a device
- * @dev: platform device
- * @num: IRQ number index
+ * platform_get_irq - get an IRQ for a device
+ * @dev: platform device
+ * @num: IRQ number index
*/
int platform_get_irq(struct platform_device *dev, unsigned int num)
{
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
- * @dev: platform device
- * @type: resource type
- * @name: resource name
+ * platform_get_resource_byname - get a resource for a device by name
+ * @dev: platform device
+ * @type: resource type
+ * @name: resource name
*/
-struct resource *
-platform_get_resource_byname(struct platform_device *dev, unsigned int type,
- char *name)
+struct resource *platform_get_resource_byname(struct platform_device *dev,
+ unsigned int type, char *name)
{
int i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
- if ((r->flags & (IORESOURCE_IO|IORESOURCE_MEM|
- IORESOURCE_IRQ|IORESOURCE_DMA)) == type)
- if (!strcmp(r->name, name))
- return r;
+ if (type == resource_type(r) && !strcmp(r->name, name))
+ return r;
}
return NULL;
}
+EXPORT_SYMBOL_GPL(platform_get_resource_byname);
/**
- * platform_get_irq - get an IRQ for a device
- * @dev: platform device
- * @name: IRQ name
+ * platform_get_irq - get an IRQ for a device
+ * @dev: platform device
+ * @name: IRQ name
*/
int platform_get_irq_byname(struct platform_device *dev, char *name)
{
- struct resource *r = platform_get_resource_byname(dev, IORESOURCE_IRQ, name);
+ 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
- * @devs: array of platform devices to add
- * @num: number of platform devices in array
+ * platform_add_devices - add a numbers of platform devices
+ * @devs: array of platform devices to add
+ * @num: number of platform devices in array
*/
int platform_add_devices(struct platform_device **devs, int num)
{
return ret;
}
+EXPORT_SYMBOL_GPL(platform_add_devices);
struct platform_object {
struct platform_device pdev;
};
/**
- * platform_device_put
- * @pdev: platform device to free
+ * 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.
+ * 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)
{
static void platform_device_release(struct device *dev)
{
- struct platform_object *pa = container_of(dev, struct platform_object, pdev.dev);
+ struct platform_object *pa = container_of(dev, struct platform_object,
+ pdev.dev);
kfree(pa->pdev.dev.platform_data);
kfree(pa->pdev.resource);
}
/**
- * platform_device_alloc
- * @name: base name of the device we're adding
- * @id: instance id
+ * 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.
+ * 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_device *platform_device_alloc(const char *name, int id)
{
struct platform_object *pa;
pa->pdev.dev.release = platform_device_release;
}
- return pa ? &pa->pdev : NULL;
+ 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
+ * 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.
+ * 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)
+int platform_device_add_resources(struct platform_device *pdev,
+ struct resource *res, unsigned int num)
{
struct resource *r;
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
+ * 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.
+ * 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)
+int platform_device_add_data(struct platform_device *pdev, const void *data,
+ size_t size)
{
void *d;
if (d) {
memcpy(d, data, size);
pdev->dev.platform_data = d;
+ pdev->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
+ * 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().
+ * This is part 2 of platform_device_register(), though may be called
+ * separately _iff_ pdev was allocated by platform_device_alloc().
*/
int platform_device_add(struct platform_device *pdev)
{
pdev->dev.bus = &platform_bus_type;
if (pdev->id != -1)
- snprintf(pdev->dev.bus_id, BUS_ID_SIZE, "%s.%u", pdev->name, pdev->id);
+ dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
else
- strlcpy(pdev->dev.bus_id, pdev->name, BUS_ID_SIZE);
+ dev_set_name(&pdev->dev, pdev->name);
+
+ /* We will remove platform_data field from struct device
+ * if all platform devices pass its platform specific data
+ * from platform_device. The conversion is going to be a
+ * long time, so we allow the two cases coexist to make
+ * this kind of fix more easily*/
+ if (pdev->platform_data && pdev->dev.platform_data) {
+ printk(KERN_ERR
+ "%s: use which platform_data?\n",
+ dev_name(&pdev->dev));
+ } else if (pdev->platform_data) {
+ pdev->dev.platform_data = pdev->platform_data;
+ } else if (pdev->dev.platform_data) {
+ pdev->platform_data = pdev->dev.platform_data;
+ }
for (i = 0; i < pdev->num_resources; i++) {
struct resource *p, *r = &pdev->resource[i];
if (r->name == NULL)
- r->name = pdev->dev.bus_id;
+ r->name = dev_name(&pdev->dev);
p = r->parent;
if (!p) {
- if (r->flags & IORESOURCE_MEM)
+ if (resource_type(r) == IORESOURCE_MEM)
p = &iomem_resource;
- else if (r->flags & IORESOURCE_IO)
+ else if (resource_type(r) == IORESOURCE_IO)
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);
+ dev_name(&pdev->dev), i);
ret = -EBUSY;
goto failed;
}
}
pr_debug("Registering platform device '%s'. Parent at %s\n",
- pdev->dev.bus_id, pdev->dev.parent->bus_id);
+ dev_name(&pdev->dev), dev_name(pdev->dev.parent));
- ret = device_register(&pdev->dev);
+ ret = device_add(&pdev->dev);
if (ret == 0)
return ret;
failed:
- while (--i >= 0)
- if (pdev->resource[i].flags & (IORESOURCE_MEM|IORESOURCE_IO))
- release_resource(&pdev->resource[i]);
+ while (--i >= 0) {
+ struct resource *r = &pdev->resource[i];
+ unsigned long type = resource_type(r);
+
+ if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
+ release_resource(r);
+ }
+
return ret;
}
EXPORT_SYMBOL_GPL(platform_device_add);
/**
- * platform_device_register - add a platform-level device
- * @pdev: platform device we're adding
+ * 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). This function must
+ * _only_ be externally called in error cases. All other usage is a bug.
*/
-int platform_device_register(struct platform_device * pdev)
+void platform_device_del(struct platform_device *pdev)
+{
+ int i;
+
+ if (pdev) {
+ device_del(&pdev->dev);
+
+ for (i = 0; i < pdev->num_resources; i++) {
+ struct resource *r = &pdev->resource[i];
+ unsigned long type = resource_type(r);
+
+ if (type == IORESOURCE_MEM || type == IORESOURCE_IO)
+ release_resource(r);
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(platform_device_del);
+
+/**
+ * platform_device_register - add a platform-level device
+ * @pdev: platform device we're adding
+ */
+int platform_device_register(struct platform_device *pdev)
{
device_initialize(&pdev->dev);
return platform_device_add(pdev);
}
+EXPORT_SYMBOL_GPL(platform_device_register);
/**
- * platform_device_unregister - remove a platform-level device
- * @pdev: platform device we're removing
+ * platform_device_unregister - unregister a platform-level device
+ * @pdev: platform device we're unregistering
*
- * Note that this function will also release all memory- and port-based
- * resources owned by the device (@dev->resource).
+ * 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)
+void platform_device_unregister(struct platform_device *pdev)
{
- int i;
+ platform_device_del(pdev);
+ platform_device_put(pdev);
+}
+EXPORT_SYMBOL_GPL(platform_device_unregister);
- if (pdev) {
- for (i = 0; i < pdev->num_resources; i++) {
- struct resource *r = &pdev->resource[i];
- if (r->flags & (IORESOURCE_MEM|IORESOURCE_IO))
- release_resource(r);
- }
+/**
+ * platform_device_register_simple
+ * @name: base name of the device we're adding
+ * @id: instance id
+ * @res: set of resources that needs to be allocated for the device
+ * @num: number of resources
+ *
+ * This function creates a simple platform device that requires minimal
+ * resource and memory management. Canned release function freeing memory
+ * allocated for the device allows drivers using such devices to be
+ * unloaded without waiting for the last reference to the device to be
+ * dropped.
+ *
+ * This interface is primarily intended for use with legacy drivers which
+ * probe hardware directly. Because such drivers create sysfs device nodes
+ * themselves, rather than letting system infrastructure handle such device
+ * enumeration tasks, they don't fully conform to the Linux driver model.
+ * In particular, when such drivers are built as modules, they can't be
+ * "hotplugged".
+ */
+struct platform_device *platform_device_register_simple(const char *name,
+ int id,
+ struct resource *res,
+ unsigned int num)
+{
+ struct platform_device *pdev;
+ int retval;
+
+ pdev = platform_device_alloc(name, id);
+ if (!pdev) {
+ retval = -ENOMEM;
+ goto error;
+ }
- device_unregister(&pdev->dev);
+ if (num) {
+ retval = platform_device_add_resources(pdev, res, num);
+ if (retval)
+ goto error;
}
+
+ retval = platform_device_add(pdev);
+ if (retval)
+ goto error;
+
+ return pdev;
+
+error:
+ platform_device_put(pdev);
+ return ERR_PTR(retval);
}
+EXPORT_SYMBOL_GPL(platform_device_register_simple);
/**
- * platform_device_register_simple
- * @name: base name of the device we're adding
- * @id: instance id
- * @res: set of resources that needs to be allocated for the device
- * @num: number of resources
+ * platform_device_register_data
+ * @parent: parent device for the device we're adding
+ * @name: base name of the device we're adding
+ * @id: instance id
+ * @data: platform specific data for this platform device
+ * @size: size of platform specific data
*
- * This function creates a simple platform device that requires minimal
- * resource and memory management. Canned release function freeing
- * memory allocated for the device allows drivers using such devices
- * to be unloaded iwithout waiting for the last reference to the device
- * to be dropped.
+ * This function creates a simple platform device that requires minimal
+ * resource and memory management. Canned release function freeing memory
+ * allocated for the device allows drivers using such devices to be
+ * unloaded without waiting for the last reference to the device to be
+ * dropped.
*/
-struct platform_device *platform_device_register_simple(char *name, unsigned int id,
- struct resource *res, unsigned int num)
+struct platform_device *platform_device_register_data(
+ struct device *parent,
+ const char *name, int id,
+ const void *data, size_t size)
{
struct platform_device *pdev;
int retval;
goto error;
}
- if (num) {
- retval = platform_device_add_resources(pdev, res, num);
+ pdev->dev.parent = parent;
+
+ if (size) {
+ retval = platform_device_add_data(pdev, data, size);
if (retval)
goto error;
}
return drv->probe(dev);
}
+static int platform_drv_probe_fail(struct device *_dev)
+{
+ return -ENXIO;
+}
+
static int platform_drv_remove(struct device *_dev)
{
struct platform_driver *drv = to_platform_driver(_dev->driver);
}
/**
- * platform_driver_register
- * @drv: platform driver structure
+ * platform_driver_register
+ * @drv: platform driver structure
*/
int platform_driver_register(struct platform_driver *drv)
{
EXPORT_SYMBOL_GPL(platform_driver_register);
/**
- * platform_driver_unregister
- * @drv: platform driver structure
+ * platform_driver_unregister
+ * @drv: platform driver structure
*/
void platform_driver_unregister(struct platform_driver *drv)
{
}
EXPORT_SYMBOL_GPL(platform_driver_unregister);
-
/**
- * platform_match - bind platform device to platform driver.
- * @dev: device.
- * @drv: driver.
+ * platform_driver_probe - register driver for non-hotpluggable device
+ * @drv: platform driver structure
+ * @probe: the driver probe routine, probably from an __init section
+ *
+ * Use this instead of platform_driver_register() when you know the device
+ * is not hotpluggable and has already been registered, and you want to
+ * remove its run-once probe() infrastructure from memory after the driver
+ * has bound to the device.
*
- * Platform device IDs are assumed to be encoded like this:
- * "<name><instance>", where <name> is a short description of the
- * type of device, like "pci" or "floppy", and <instance> is the
- * enumerated instance of the device, like '0' or '42'.
- * Driver IDs are simply "<name>".
- * So, extract the <name> from the platform_device structure,
- * and compare it against the name of the driver. Return whether
- * they match or not.
+ * One typical use for this would be with drivers for controllers integrated
+ * into system-on-chip processors, where the controller devices have been
+ * configured as part of board setup.
+ *
+ * Returns zero if the driver registered and bound to a device, else returns
+ * a negative error code and with the driver not registered.
*/
+int __init_or_module platform_driver_probe(struct platform_driver *drv,
+ int (*probe)(struct platform_device *))
+{
+ int retval, code;
+
+ /* temporary section violation during probe() */
+ drv->probe = probe;
+ retval = code = platform_driver_register(drv);
+
+ /* Fixup that section violation, being paranoid about code scanning
+ * the list of drivers in order to probe new devices. Check to see
+ * if the probe was successful, and make sure any forced probes of
+ * new devices fail.
+ */
+ spin_lock(&platform_bus_type.p->klist_drivers.k_lock);
+ drv->probe = NULL;
+ if (code == 0 && list_empty(&drv->driver.p->klist_devices.k_list))
+ retval = -ENODEV;
+ drv->driver.probe = platform_drv_probe_fail;
+ spin_unlock(&platform_bus_type.p->klist_drivers.k_lock);
+
+ if (code != retval)
+ platform_driver_unregister(drv);
+ return retval;
+}
+EXPORT_SYMBOL_GPL(platform_driver_probe);
-static int platform_match(struct device * dev, struct device_driver * drv)
+/* 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 = container_of(dev, struct platform_device, dev);
+ struct platform_device *pdev = to_platform_device(dev);
+ int len = snprintf(buf, PAGE_SIZE, "platform:%s\n", pdev->name);
- return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0);
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
-static int platform_suspend(struct device * dev, pm_message_t state)
+static struct device_attribute platform_dev_attrs[] = {
+ __ATTR_RO(modalias),
+ __ATTR_NULL,
+};
+
+static int platform_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ add_uevent_var(env, "MODALIAS=%s%s", PLATFORM_MODULE_PREFIX,
+ (pdev->id_entry) ? pdev->id_entry->name : pdev->name);
+ return 0;
+}
+
+static const struct platform_device_id *platform_match_id(
+ struct platform_device_id *id,
+ struct platform_device *pdev)
+{
+ while (id->name[0]) {
+ if (strcmp(pdev->name, id->name) == 0) {
+ pdev->id_entry = id;
+ return id;
+ }
+ id++;
+ }
+ return NULL;
+}
+
+/**
+ * platform_match - bind platform device to platform driver.
+ * @dev: device.
+ * @drv: driver.
+ *
+ * Platform device IDs are assumed to be encoded like this:
+ * "<name><instance>", where <name> is a short description of the type of
+ * device, like "pci" or "floppy", and <instance> is the enumerated
+ * instance of the device, like '0' or '42'. Driver IDs are simply
+ * "<name>". So, extract the <name> from the platform_device structure,
+ * and compare it against the name of the driver. Return whether they match
+ * or not.
+ */
+static int platform_match(struct device *dev, struct device_driver *drv)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct platform_driver *pdrv = to_platform_driver(drv);
+
+ /* match against the id table first */
+ if (pdrv->id_table)
+ return platform_match_id(pdrv->id_table, pdev) != NULL;
+
+ /* fall-back to driver name match */
+ return (strcmp(pdev->name, drv->name) == 0);
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int platform_legacy_suspend(struct device *dev, pm_message_t mesg)
{
int ret = 0;
if (dev->driver && dev->driver->suspend)
- ret = dev->driver->suspend(dev, state);
+ ret = dev->driver->suspend(dev, mesg);
+
+ return ret;
+}
+
+static int platform_legacy_suspend_late(struct device *dev, pm_message_t mesg)
+{
+ struct platform_driver *pdrv = to_platform_driver(dev->driver);
+ struct platform_device *pdev = to_platform_device(dev);
+ int ret = 0;
+
+ if (dev->driver && pdrv->suspend_late)
+ ret = pdrv->suspend_late(pdev, mesg);
return ret;
}
-static int platform_resume(struct device * dev)
+static int platform_legacy_resume_early(struct device *dev)
+{
+ struct platform_driver *pdrv = to_platform_driver(dev->driver);
+ struct platform_device *pdev = to_platform_device(dev);
+ int ret = 0;
+
+ if (dev->driver && pdrv->resume_early)
+ ret = pdrv->resume_early(pdev);
+
+ return ret;
+}
+
+static int platform_legacy_resume(struct device *dev)
{
int ret = 0;
return ret;
}
+static int 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 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 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 = platform_legacy_suspend(dev, PMSG_SUSPEND);
+ }
+
+ return ret;
+}
+
+static int 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);
+ } else {
+ ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND);
+ }
+
+ return ret;
+}
+
+static int 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 = platform_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+static int 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);
+ } else {
+ ret = platform_legacy_resume_early(dev);
+ }
+
+ return ret;
+}
+
+#else /* !CONFIG_SUSPEND */
+
+#define platform_pm_suspend NULL
+#define platform_pm_resume NULL
+#define platform_pm_suspend_noirq NULL
+#define platform_pm_resume_noirq NULL
+
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_HIBERNATION
+
+static int 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 = platform_legacy_suspend(dev, PMSG_FREEZE);
+ }
+
+ return ret;
+}
+
+static int 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);
+ } else {
+ ret = platform_legacy_suspend_late(dev, PMSG_FREEZE);
+ }
+
+ return ret;
+}
+
+static int 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 = platform_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+static int 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);
+ } else {
+ ret = platform_legacy_resume_early(dev);
+ }
+
+ return ret;
+}
+
+static int 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 = platform_legacy_suspend(dev, PMSG_HIBERNATE);
+ }
+
+ return ret;
+}
+
+static int 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);
+ } else {
+ ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE);
+ }
+
+ return ret;
+}
+
+static int 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 = platform_legacy_resume(dev);
+ }
+
+ return ret;
+}
+
+static int 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);
+ } else {
+ ret = platform_legacy_resume_early(dev);
+ }
+
+ return ret;
+}
+
+#else /* !CONFIG_HIBERNATION */
+
+#define platform_pm_freeze NULL
+#define platform_pm_thaw NULL
+#define platform_pm_poweroff NULL
+#define platform_pm_restore NULL
+#define platform_pm_freeze_noirq NULL
+#define platform_pm_thaw_noirq NULL
+#define platform_pm_poweroff_noirq NULL
+#define platform_pm_restore_noirq NULL
+
+#endif /* !CONFIG_HIBERNATION */
+
+static struct dev_pm_ops platform_dev_pm_ops = {
+ .prepare = platform_pm_prepare,
+ .complete = platform_pm_complete,
+ .suspend = platform_pm_suspend,
+ .resume = platform_pm_resume,
+ .freeze = platform_pm_freeze,
+ .thaw = platform_pm_thaw,
+ .poweroff = platform_pm_poweroff,
+ .restore = platform_pm_restore,
+ .suspend_noirq = platform_pm_suspend_noirq,
+ .resume_noirq = platform_pm_resume_noirq,
+ .freeze_noirq = platform_pm_freeze_noirq,
+ .thaw_noirq = platform_pm_thaw_noirq,
+ .poweroff_noirq = platform_pm_poweroff_noirq,
+ .restore_noirq = platform_pm_restore_noirq,
+};
+
+#define PLATFORM_PM_OPS_PTR (&platform_dev_pm_ops)
+
+#else /* !CONFIG_PM_SLEEP */
+
+#define PLATFORM_PM_OPS_PTR NULL
+
+#endif /* !CONFIG_PM_SLEEP */
+
struct bus_type platform_bus_type = {
.name = "platform",
+ .dev_attrs = platform_dev_attrs,
.match = platform_match,
- .suspend = platform_suspend,
- .resume = platform_resume,
+ .uevent = platform_uevent,
+ .pm = PLATFORM_PM_OPS_PTR,
};
+EXPORT_SYMBOL_GPL(platform_bus_type);
int __init platform_bus_init(void)
{
- device_register(&platform_bus);
- return bus_register(&platform_bus_type);
+ int error;
+
+ early_platform_cleanup();
+
+ error = device_register(&platform_bus);
+ if (error)
+ return error;
+ error = bus_register(&platform_bus_type);
+ if (error)
+ device_unregister(&platform_bus);
+ return error;
}
#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK
high_totalram += high_totalram - 1;
mask = (((u64)high_totalram) << 32) + 0xffffffff;
}
- return mask & *dev->dma_mask;
+ return mask;
}
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);
+static __initdata LIST_HEAD(early_platform_driver_list);
+static __initdata LIST_HEAD(early_platform_device_list);
+
+/**
+ * early_platform_driver_register
+ * @edrv: early_platform driver structure
+ * @buf: string passed from early_param()
+ */
+int __init early_platform_driver_register(struct early_platform_driver *epdrv,
+ char *buf)
+{
+ unsigned long index;
+ int n;
+
+ /* Simply add the driver to the end of the global list.
+ * Drivers will by default be put on the list in compiled-in order.
+ */
+ if (!epdrv->list.next) {
+ INIT_LIST_HEAD(&epdrv->list);
+ list_add_tail(&epdrv->list, &early_platform_driver_list);
+ }
+
+ /* If the user has specified device then make sure the driver
+ * gets prioritized. The driver of the last device specified on
+ * command line will be put first on the list.
+ */
+ n = strlen(epdrv->pdrv->driver.name);
+ if (buf && !strncmp(buf, epdrv->pdrv->driver.name, n)) {
+ list_move(&epdrv->list, &early_platform_driver_list);
+
+ if (!strcmp(buf, epdrv->pdrv->driver.name))
+ epdrv->requested_id = -1;
+ else if (buf[n] == '.' && strict_strtoul(&buf[n + 1], 10,
+ &index) == 0)
+ epdrv->requested_id = index;
+ else
+ epdrv->requested_id = EARLY_PLATFORM_ID_ERROR;
+ }
+
+ return 0;
+}
+
+/**
+ * early_platform_add_devices - add a numbers of early platform devices
+ * @devs: array of early platform devices to add
+ * @num: number of early platform devices in array
+ */
+void __init early_platform_add_devices(struct platform_device **devs, int num)
+{
+ struct device *dev;
+ int i;
+
+ /* simply add the devices to list */
+ for (i = 0; i < num; i++) {
+ dev = &devs[i]->dev;
+
+ if (!dev->devres_head.next) {
+ INIT_LIST_HEAD(&dev->devres_head);
+ list_add_tail(&dev->devres_head,
+ &early_platform_device_list);
+ }
+ }
+}
+
+/**
+ * early_platform_driver_register_all
+ * @class_str: string to identify early platform driver class
+ */
+void __init early_platform_driver_register_all(char *class_str)
+{
+ /* The "class_str" parameter may or may not be present on the kernel
+ * command line. If it is present then there may be more than one
+ * matching parameter.
+ *
+ * Since we register our early platform drivers using early_param()
+ * we need to make sure that they also get registered in the case
+ * when the parameter is missing from the kernel command line.
+ *
+ * We use parse_early_options() to make sure the early_param() gets
+ * called at least once. The early_param() may be called more than
+ * once since the name of the preferred device may be specified on
+ * the kernel command line. early_platform_driver_register() handles
+ * this case for us.
+ */
+ parse_early_options(class_str);
+}
+
+/**
+ * early_platform_match
+ * @edrv: early platform driver structure
+ * @id: id to match against
+ */
+static __init struct platform_device *
+early_platform_match(struct early_platform_driver *epdrv, int id)
+{
+ struct platform_device *pd;
+
+ list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
+ if (platform_match(&pd->dev, &epdrv->pdrv->driver))
+ if (pd->id == id)
+ return pd;
+
+ return NULL;
+}
+
+/**
+ * early_platform_left
+ * @edrv: early platform driver structure
+ * @id: return true if id or above exists
+ */
+static __init int early_platform_left(struct early_platform_driver *epdrv,
+ int id)
+{
+ struct platform_device *pd;
+
+ list_for_each_entry(pd, &early_platform_device_list, dev.devres_head)
+ if (platform_match(&pd->dev, &epdrv->pdrv->driver))
+ if (pd->id >= id)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * early_platform_driver_probe_id
+ * @class_str: string to identify early platform driver class
+ * @id: id to match against
+ * @nr_probe: number of platform devices to successfully probe before exiting
+ */
+static int __init early_platform_driver_probe_id(char *class_str,
+ int id,
+ int nr_probe)
+{
+ struct early_platform_driver *epdrv;
+ struct platform_device *match;
+ int match_id;
+ int n = 0;
+ int left = 0;
+
+ list_for_each_entry(epdrv, &early_platform_driver_list, list) {
+ /* only use drivers matching our class_str */
+ if (strcmp(class_str, epdrv->class_str))
+ continue;
+
+ if (id == -2) {
+ match_id = epdrv->requested_id;
+ left = 1;
+
+ } else {
+ match_id = id;
+ left += early_platform_left(epdrv, id);
+
+ /* skip requested id */
+ switch (epdrv->requested_id) {
+ case EARLY_PLATFORM_ID_ERROR:
+ case EARLY_PLATFORM_ID_UNSET:
+ break;
+ default:
+ if (epdrv->requested_id == id)
+ match_id = EARLY_PLATFORM_ID_UNSET;
+ }
+ }
+
+ switch (match_id) {
+ case EARLY_PLATFORM_ID_ERROR:
+ pr_warning("%s: unable to parse %s parameter\n",
+ class_str, epdrv->pdrv->driver.name);
+ /* fall-through */
+ case EARLY_PLATFORM_ID_UNSET:
+ match = NULL;
+ break;
+ default:
+ match = early_platform_match(epdrv, match_id);
+ }
+
+ if (match) {
+ if (epdrv->pdrv->probe(match))
+ pr_warning("%s: unable to probe %s early.\n",
+ class_str, match->name);
+ else
+ n++;
+ }
+
+ if (n >= nr_probe)
+ break;
+ }
+
+ if (left)
+ return n;
+ else
+ return -ENODEV;
+}
+
+/**
+ * early_platform_driver_probe
+ * @class_str: string to identify early platform driver class
+ * @nr_probe: number of platform devices to successfully probe before exiting
+ * @user_only: only probe user specified early platform devices
+ */
+int __init early_platform_driver_probe(char *class_str,
+ int nr_probe,
+ int user_only)
+{
+ int k, n, i;
+
+ n = 0;
+ for (i = -2; n < nr_probe; i++) {
+ k = early_platform_driver_probe_id(class_str, i, nr_probe - n);
+
+ if (k < 0)
+ break;
+
+ n += k;
+
+ if (user_only)
+ break;
+ }
+
+ return n;
+}
+
+/**
+ * early_platform_cleanup - clean up early platform code
+ */
+void __init early_platform_cleanup(void)
+{
+ struct platform_device *pd, *pd2;
+
+ /* clean up the devres list used to chain devices */
+ list_for_each_entry_safe(pd, pd2, &early_platform_device_list,
+ dev.devres_head) {
+ list_del(&pd->dev.devres_head);
+ memset(&pd->dev.devres_head, 0, sizeof(pd->dev.devres_head));
+ }
+}
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff