FW_STATUS_DONE,
FW_STATUS_ABORT,
FW_STATUS_READY,
+ FW_STATUS_READY_NOHOTPLUG,
};
static int loading_timeout = 10; /* In seconds */
}
/**
- * firmware_timeout_store:
- * Description:
+ * firmware_timeout_store - set number of seconds to wait for firmware
+ * @class: device class pointer
+ * @buf: buffer to scan for timeout value
+ * @count: number of bytes in @buf
+ *
* Sets the number of seconds to wait for the firmware. Once
- * this expires an error will be return to the driver and no
+ * this expires an error will be returned to the driver and no
* firmware will be provided.
*
- * Note: zero means 'wait for ever'
- *
+ * Note: zero means 'wait forever'.
**/
static ssize_t
firmware_timeout_store(struct class *class, const char *buf, size_t count)
}
/**
- * firmware_loading_store: - loading control file
- * Description:
+ * firmware_loading_store - set value in the 'loading' control file
+ * @class_dev: class_device pointer
+ * @buf: buffer to scan for loading control value
+ * @count: number of bytes in @buf
+ *
* The relevant values are:
*
* 1: Start a load, discarding any previous partial load.
- * 0: Conclude the load and handle the data to the driver code.
+ * 0: Conclude the load and hand the data to the driver code.
* -1: Conclude the load with an error and discard any written data.
**/
static ssize_t
up(&fw_lock);
return ret_count;
}
+
static int
fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
{
}
/**
- * firmware_data_write:
- *
- * Description:
+ * firmware_data_write - write method for firmware
+ * @kobj: kobject for the class_device
+ * @buffer: buffer being written
+ * @offset: buffer offset for write in total data store area
+ * @count: buffer size
*
- * Data written to the 'data' attribute will be later handled to
+ * Data written to the 'data' attribute will be later handed to
* the driver as a firmware image.
**/
static ssize_t
up(&fw_lock);
return retval;
}
+
static struct bin_attribute firmware_attr_data_tmpl = {
.attr = {.name = "data", .mode = 0644, .owner = THIS_MODULE},
.size = 0,
const char *fw_name, struct device *device)
{
int retval;
- struct firmware_priv *fw_priv = kmalloc(sizeof (struct firmware_priv),
+ struct firmware_priv *fw_priv = kzalloc(sizeof(*fw_priv),
GFP_KERNEL);
- struct class_device *class_dev = kmalloc(sizeof (struct class_device),
+ struct class_device *class_dev = kzalloc(sizeof(*class_dev),
GFP_KERNEL);
*class_dev_p = NULL;
retval = -ENOMEM;
goto error_kfree;
}
- memset(fw_priv, 0, sizeof (*fw_priv));
- memset(class_dev, 0, sizeof (*class_dev));
init_completion(&fw_priv->completion);
fw_priv->attr_data = firmware_attr_data_tmpl;
static int
fw_setup_class_device(struct firmware *fw, struct class_device **class_dev_p,
- const char *fw_name, struct device *device)
+ const char *fw_name, struct device *device, int hotplug)
{
struct class_device *class_dev;
struct firmware_priv *fw_priv;
goto error_unreg;
}
- set_bit(FW_STATUS_READY, &fw_priv->status);
+ if (hotplug)
+ set_bit(FW_STATUS_READY, &fw_priv->status);
+ else
+ set_bit(FW_STATUS_READY_NOHOTPLUG, &fw_priv->status);
*class_dev_p = class_dev;
goto out;
return retval;
}
-/**
- * request_firmware: - request firmware to hotplug and wait for it
- * Description:
- * @firmware will be used to return a firmware image by the name
- * of @name for device @device.
- *
- * Should be called from user context where sleeping is allowed.
- *
- * @name will be use as $FIRMWARE in the hotplug environment and
- * should be distinctive enough not to be confused with any other
- * firmware image for this or any other device.
- **/
-int
-request_firmware(const struct firmware **firmware_p, const char *name,
- struct device *device)
+static int
+_request_firmware(const struct firmware **firmware_p, const char *name,
+ struct device *device, int hotplug)
{
struct class_device *class_dev;
struct firmware_priv *fw_priv;
if (!firmware_p)
return -EINVAL;
- *firmware_p = firmware = kmalloc(sizeof (struct firmware), GFP_KERNEL);
+ *firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
if (!firmware) {
printk(KERN_ERR "%s: kmalloc(struct firmware) failed\n",
__FUNCTION__);
retval = -ENOMEM;
goto out;
}
- memset(firmware, 0, sizeof (*firmware));
- retval = fw_setup_class_device(firmware, &class_dev, name, device);
+ retval = fw_setup_class_device(firmware, &class_dev, name, device,
+ hotplug);
if (retval)
goto error_kfree_fw;
fw_priv = class_get_devdata(class_dev);
- if (loading_timeout > 0) {
- fw_priv->timeout.expires = jiffies + loading_timeout * HZ;
- add_timer(&fw_priv->timeout);
- }
-
- kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
- wait_for_completion(&fw_priv->completion);
- set_bit(FW_STATUS_DONE, &fw_priv->status);
+ if (hotplug) {
+ if (loading_timeout > 0) {
+ fw_priv->timeout.expires = jiffies + loading_timeout * HZ;
+ add_timer(&fw_priv->timeout);
+ }
- del_timer_sync(&fw_priv->timeout);
+ kobject_hotplug(&class_dev->kobj, KOBJ_ADD);
+ wait_for_completion(&fw_priv->completion);
+ set_bit(FW_STATUS_DONE, &fw_priv->status);
+ del_timer_sync(&fw_priv->timeout);
+ } else
+ wait_for_completion(&fw_priv->completion);
down(&fw_lock);
if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) {
return retval;
}
+/**
+ * request_firmware: - request firmware to hotplug and wait for it
+ * @firmware_p: pointer to firmware image
+ * @name: name of firmware file
+ * @device: device for which firmware is being loaded
+ *
+ * @firmware_p will be used to return a firmware image by the name
+ * of @name for device @device.
+ *
+ * Should be called from user context where sleeping is allowed.
+ *
+ * @name will be used as $FIRMWARE in the hotplug environment and
+ * should be distinctive enough not to be confused with any other
+ * firmware image for this or any other device.
+ **/
+int
+request_firmware(const struct firmware **firmware_p, const char *name,
+ struct device *device)
+{
+ int hotplug = 1;
+ return _request_firmware(firmware_p, name, device, hotplug);
+}
+
/**
* release_firmware: - release the resource associated with a firmware image
+ * @fw: firmware resource to release
**/
void
release_firmware(const struct firmware *fw)
/**
* register_firmware: - provide a firmware image for later usage
+ * @name: name of firmware image file
+ * @data: buffer pointer for the firmware image
+ * @size: size of the data buffer area
*
- * Description:
* Make sure that @data will be available by requesting firmware @name.
*
* Note: This will not be possible until some kind of persistence
struct device *device;
void *context;
void (*cont)(const struct firmware *fw, void *context);
+ int hotplug;
};
static int
return 0;
}
daemonize("%s/%s", "firmware", fw_work->name);
- request_firmware(&fw, fw_work->name, fw_work->device);
+ _request_firmware(&fw, fw_work->name, fw_work->device,
+ fw_work->hotplug);
fw_work->cont(fw, fw_work->context);
release_firmware(fw);
module_put(fw_work->module);
}
/**
- * request_firmware_nowait:
+ * request_firmware_nowait: asynchronous version of request_firmware
+ * @module: module requesting the firmware
+ * @hotplug: invokes hotplug event to copy the firmware image if this flag
+ * is non-zero else the firmware copy must be done manually.
+ * @name: name of firmware file
+ * @device: device for which firmware is being loaded
+ * @context: will be passed over to @cont, and
+ * @fw may be %NULL if firmware request fails.
+ * @cont: function will be called asynchronously when the firmware
+ * request is over.
*
- * Description:
* Asynchronous variant of request_firmware() for contexts where
* it is not possible to sleep.
- *
- * @cont will be called asynchronously when the firmware request is over.
- *
- * @context will be passed over to @cont.
- *
- * @fw may be %NULL if firmware request fails.
- *
**/
int
request_firmware_nowait(
- struct module *module,
+ struct module *module, int hotplug,
const char *name, struct device *device, void *context,
void (*cont)(const struct firmware *fw, void *context))
{
.device = device,
.context = context,
.cont = cont,
+ .hotplug = hotplug,
};
ret = kernel_thread(request_firmware_work_func, fw_work,
projects / powerpc.git / blobdiff