2005-04-16 16:20:36 -06:00
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/*
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* firmware_class.c - Multi purpose firmware loading support
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*
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* Copyright (c) 2003 Manuel Estrada Sainz <ranty@debian.org>
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*
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* Please see Documentation/firmware_class/ for more information.
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*
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*/
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2006-01-11 13:17:46 -07:00
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#include <linux/capability.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/vmalloc.h>
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#include <linux/interrupt.h>
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#include <linux/bitops.h>
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2006-05-23 15:22:38 -06:00
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#include <linux/mutex.h>
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2005-04-16 16:20:36 -06:00
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#include <linux/firmware.h>
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#include "base.h"
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MODULE_AUTHOR("Manuel Estrada Sainz <ranty@debian.org>");
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MODULE_DESCRIPTION("Multi purpose firmware loading support");
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MODULE_LICENSE("GPL");
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enum {
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FW_STATUS_LOADING,
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FW_STATUS_DONE,
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FW_STATUS_ABORT,
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FW_STATUS_READY,
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2005-09-06 16:17:13 -06:00
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FW_STATUS_READY_NOHOTPLUG,
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2005-04-16 16:20:36 -06:00
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};
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static int loading_timeout = 10; /* In seconds */
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/* fw_lock could be moved to 'struct firmware_priv' but since it is just
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* guarding for corner cases a global lock should be OK */
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2006-05-23 15:22:38 -06:00
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static DEFINE_MUTEX(fw_lock);
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2005-04-16 16:20:36 -06:00
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struct firmware_priv {
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char fw_id[FIRMWARE_NAME_MAX];
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struct completion completion;
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struct bin_attribute attr_data;
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struct firmware *fw;
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unsigned long status;
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int alloc_size;
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struct timer_list timeout;
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};
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2006-01-14 14:20:43 -07:00
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static void
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2005-04-16 16:20:36 -06:00
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fw_load_abort(struct firmware_priv *fw_priv)
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{
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set_bit(FW_STATUS_ABORT, &fw_priv->status);
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wmb();
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complete(&fw_priv->completion);
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}
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static ssize_t
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firmware_timeout_show(struct class *class, char *buf)
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{
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return sprintf(buf, "%d\n", loading_timeout);
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}
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/**
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2005-10-30 16:03:01 -07:00
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* firmware_timeout_store - set number of seconds to wait for firmware
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* @class: device class pointer
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* @buf: buffer to scan for timeout value
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* @count: number of bytes in @buf
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*
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2005-04-16 16:20:36 -06:00
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* Sets the number of seconds to wait for the firmware. Once
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2005-10-30 16:03:01 -07:00
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* this expires an error will be returned to the driver and no
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2005-04-16 16:20:36 -06:00
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* firmware will be provided.
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*
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2005-10-30 16:03:01 -07:00
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* Note: zero means 'wait forever'.
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2005-04-16 16:20:36 -06:00
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**/
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static ssize_t
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firmware_timeout_store(struct class *class, const char *buf, size_t count)
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{
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loading_timeout = simple_strtol(buf, NULL, 10);
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2005-06-28 21:44:51 -06:00
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if (loading_timeout < 0)
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loading_timeout = 0;
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2005-04-16 16:20:36 -06:00
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return count;
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}
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static CLASS_ATTR(timeout, 0644, firmware_timeout_show, firmware_timeout_store);
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static void fw_class_dev_release(struct class_device *class_dev);
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2006-05-20 16:00:16 -06:00
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static int firmware_class_uevent(struct class_device *class_dev, char **envp,
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int num_envp, char *buffer, int buffer_size)
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2005-04-16 16:20:36 -06:00
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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int i = 0, len = 0;
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if (!test_bit(FW_STATUS_READY, &fw_priv->status))
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return -ENODEV;
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2005-11-16 01:00:00 -07:00
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if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
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"FIRMWARE=%s", fw_priv->fw_id))
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2005-04-16 16:20:36 -06:00
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return -ENOMEM;
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2005-11-16 01:00:00 -07:00
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if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
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"TIMEOUT=%i", loading_timeout))
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2005-04-18 22:57:31 -06:00
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return -ENOMEM;
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2005-04-16 16:20:36 -06:00
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envp[i] = NULL;
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return 0;
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}
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2006-05-20 16:00:16 -06:00
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static struct class firmware_class = {
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.name = "firmware",
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.uevent = firmware_class_uevent,
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.release = fw_class_dev_release,
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};
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2005-04-16 16:20:36 -06:00
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static ssize_t
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firmware_loading_show(struct class_device *class_dev, char *buf)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status);
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return sprintf(buf, "%d\n", loading);
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}
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/**
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2005-10-30 16:03:01 -07:00
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* firmware_loading_store - set value in the 'loading' control file
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* @class_dev: class_device pointer
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* @buf: buffer to scan for loading control value
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* @count: number of bytes in @buf
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*
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2005-04-16 16:20:36 -06:00
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* The relevant values are:
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*
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* 1: Start a load, discarding any previous partial load.
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2005-10-30 16:03:01 -07:00
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* 0: Conclude the load and hand the data to the driver code.
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2005-04-16 16:20:36 -06:00
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* -1: Conclude the load with an error and discard any written data.
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**/
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static ssize_t
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firmware_loading_store(struct class_device *class_dev,
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const char *buf, size_t count)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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int loading = simple_strtol(buf, NULL, 10);
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switch (loading) {
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case 1:
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2006-05-23 15:22:38 -06:00
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mutex_lock(&fw_lock);
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2005-06-28 21:44:51 -06:00
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if (!fw_priv->fw) {
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2006-05-23 15:22:38 -06:00
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mutex_unlock(&fw_lock);
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2005-06-28 21:44:51 -06:00
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break;
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}
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2005-04-16 16:20:36 -06:00
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vfree(fw_priv->fw->data);
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fw_priv->fw->data = NULL;
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fw_priv->fw->size = 0;
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fw_priv->alloc_size = 0;
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set_bit(FW_STATUS_LOADING, &fw_priv->status);
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2006-05-23 15:22:38 -06:00
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mutex_unlock(&fw_lock);
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2005-04-16 16:20:36 -06:00
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break;
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case 0:
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if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) {
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complete(&fw_priv->completion);
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clear_bit(FW_STATUS_LOADING, &fw_priv->status);
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break;
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}
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/* fallthrough */
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default:
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printk(KERN_ERR "%s: unexpected value (%d)\n", __FUNCTION__,
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loading);
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/* fallthrough */
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case -1:
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fw_load_abort(fw_priv);
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break;
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}
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return count;
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}
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static CLASS_DEVICE_ATTR(loading, 0644,
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firmware_loading_show, firmware_loading_store);
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static ssize_t
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firmware_data_read(struct kobject *kobj,
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char *buffer, loff_t offset, size_t count)
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{
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struct class_device *class_dev = to_class_dev(kobj);
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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struct firmware *fw;
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ssize_t ret_count = count;
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2006-05-23 15:22:38 -06:00
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mutex_lock(&fw_lock);
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2005-04-16 16:20:36 -06:00
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fw = fw_priv->fw;
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2005-06-28 21:44:51 -06:00
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if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) {
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2005-04-16 16:20:36 -06:00
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ret_count = -ENODEV;
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goto out;
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}
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if (offset > fw->size) {
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ret_count = 0;
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goto out;
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}
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if (offset + ret_count > fw->size)
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ret_count = fw->size - offset;
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memcpy(buffer, fw->data + offset, ret_count);
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out:
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2006-05-23 15:22:38 -06:00
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mutex_unlock(&fw_lock);
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2005-04-16 16:20:36 -06:00
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return ret_count;
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}
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2005-10-30 16:03:01 -07:00
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2005-04-16 16:20:36 -06:00
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static int
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fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
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{
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u8 *new_data;
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2006-02-13 15:52:38 -07:00
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int new_size = fw_priv->alloc_size;
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2005-04-16 16:20:36 -06:00
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if (min_size <= fw_priv->alloc_size)
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return 0;
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2006-02-13 15:52:38 -07:00
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new_size = ALIGN(min_size, PAGE_SIZE);
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new_data = vmalloc(new_size);
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2005-04-16 16:20:36 -06:00
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if (!new_data) {
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printk(KERN_ERR "%s: unable to alloc buffer\n", __FUNCTION__);
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/* Make sure that we don't keep incomplete data */
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fw_load_abort(fw_priv);
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return -ENOMEM;
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}
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2006-02-13 15:52:38 -07:00
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fw_priv->alloc_size = new_size;
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2005-04-16 16:20:36 -06:00
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if (fw_priv->fw->data) {
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memcpy(new_data, fw_priv->fw->data, fw_priv->fw->size);
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vfree(fw_priv->fw->data);
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}
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fw_priv->fw->data = new_data;
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BUG_ON(min_size > fw_priv->alloc_size);
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return 0;
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}
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/**
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2005-10-30 16:03:01 -07:00
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* firmware_data_write - write method for firmware
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* @kobj: kobject for the class_device
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* @buffer: buffer being written
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* @offset: buffer offset for write in total data store area
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* @count: buffer size
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2005-04-16 16:20:36 -06:00
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*
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2005-10-30 16:03:01 -07:00
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* Data written to the 'data' attribute will be later handed to
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2005-04-16 16:20:36 -06:00
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* the driver as a firmware image.
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**/
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static ssize_t
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firmware_data_write(struct kobject *kobj,
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char *buffer, loff_t offset, size_t count)
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{
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struct class_device *class_dev = to_class_dev(kobj);
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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struct firmware *fw;
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ssize_t retval;
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if (!capable(CAP_SYS_RAWIO))
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return -EPERM;
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2005-06-28 21:44:51 -06:00
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2006-05-23 15:22:38 -06:00
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mutex_lock(&fw_lock);
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2005-04-16 16:20:36 -06:00
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fw = fw_priv->fw;
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2005-06-28 21:44:51 -06:00
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if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) {
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2005-04-16 16:20:36 -06:00
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retval = -ENODEV;
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goto out;
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}
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retval = fw_realloc_buffer(fw_priv, offset + count);
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if (retval)
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goto out;
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memcpy(fw->data + offset, buffer, count);
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fw->size = max_t(size_t, offset + count, fw->size);
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retval = count;
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out:
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2006-05-23 15:22:38 -06:00
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mutex_unlock(&fw_lock);
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2005-04-16 16:20:36 -06:00
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return retval;
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}
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2005-10-30 16:03:01 -07:00
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2005-04-16 16:20:36 -06:00
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static struct bin_attribute firmware_attr_data_tmpl = {
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.attr = {.name = "data", .mode = 0644, .owner = THIS_MODULE},
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.size = 0,
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.read = firmware_data_read,
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.write = firmware_data_write,
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};
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static void
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fw_class_dev_release(struct class_device *class_dev)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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kfree(fw_priv);
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kfree(class_dev);
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module_put(THIS_MODULE);
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}
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static void
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firmware_class_timeout(u_long data)
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{
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struct firmware_priv *fw_priv = (struct firmware_priv *) data;
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fw_load_abort(fw_priv);
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}
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static inline void
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fw_setup_class_device_id(struct class_device *class_dev, struct device *dev)
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{
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/* XXX warning we should watch out for name collisions */
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strlcpy(class_dev->class_id, dev->bus_id, BUS_ID_SIZE);
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}
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static int
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fw_register_class_device(struct class_device **class_dev_p,
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const char *fw_name, struct device *device)
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{
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int retval;
|
2005-09-13 02:25:01 -06:00
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|
struct firmware_priv *fw_priv = kzalloc(sizeof(*fw_priv),
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2005-04-16 16:20:36 -06:00
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GFP_KERNEL);
|
2005-09-13 02:25:01 -06:00
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struct class_device *class_dev = kzalloc(sizeof(*class_dev),
|
2005-04-16 16:20:36 -06:00
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GFP_KERNEL);
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*class_dev_p = NULL;
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if (!fw_priv || !class_dev) {
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printk(KERN_ERR "%s: kmalloc failed\n", __FUNCTION__);
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retval = -ENOMEM;
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goto error_kfree;
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}
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init_completion(&fw_priv->completion);
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fw_priv->attr_data = firmware_attr_data_tmpl;
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strlcpy(fw_priv->fw_id, fw_name, FIRMWARE_NAME_MAX);
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fw_priv->timeout.function = firmware_class_timeout;
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|
|
fw_priv->timeout.data = (u_long) fw_priv;
|
|
|
|
init_timer(&fw_priv->timeout);
|
|
|
|
|
|
|
|
fw_setup_class_device_id(class_dev, device);
|
|
|
|
class_dev->dev = device;
|
|
|
|
class_dev->class = &firmware_class;
|
|
|
|
class_set_devdata(class_dev, fw_priv);
|
|
|
|
retval = class_device_register(class_dev);
|
|
|
|
if (retval) {
|
|
|
|
printk(KERN_ERR "%s: class_device_register failed\n",
|
|
|
|
__FUNCTION__);
|
|
|
|
goto error_kfree;
|
|
|
|
}
|
|
|
|
*class_dev_p = class_dev;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
error_kfree:
|
|
|
|
kfree(fw_priv);
|
|
|
|
kfree(class_dev);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
fw_setup_class_device(struct firmware *fw, struct class_device **class_dev_p,
|
2005-11-16 01:00:00 -07:00
|
|
|
const char *fw_name, struct device *device, int uevent)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct class_device *class_dev;
|
|
|
|
struct firmware_priv *fw_priv;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
*class_dev_p = NULL;
|
|
|
|
retval = fw_register_class_device(&class_dev, fw_name, device);
|
|
|
|
if (retval)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
/* Need to pin this module until class device is destroyed */
|
|
|
|
__module_get(THIS_MODULE);
|
|
|
|
|
|
|
|
fw_priv = class_get_devdata(class_dev);
|
|
|
|
|
|
|
|
fw_priv->fw = fw;
|
|
|
|
retval = sysfs_create_bin_file(&class_dev->kobj, &fw_priv->attr_data);
|
|
|
|
if (retval) {
|
|
|
|
printk(KERN_ERR "%s: sysfs_create_bin_file failed\n",
|
|
|
|
__FUNCTION__);
|
|
|
|
goto error_unreg;
|
|
|
|
}
|
|
|
|
|
|
|
|
retval = class_device_create_file(class_dev,
|
|
|
|
&class_device_attr_loading);
|
|
|
|
if (retval) {
|
|
|
|
printk(KERN_ERR "%s: class_device_create_file failed\n",
|
|
|
|
__FUNCTION__);
|
|
|
|
goto error_unreg;
|
|
|
|
}
|
|
|
|
|
2005-11-16 01:00:00 -07:00
|
|
|
if (uevent)
|
2005-09-06 16:17:13 -06:00
|
|
|
set_bit(FW_STATUS_READY, &fw_priv->status);
|
|
|
|
else
|
|
|
|
set_bit(FW_STATUS_READY_NOHOTPLUG, &fw_priv->status);
|
2005-04-16 16:20:36 -06:00
|
|
|
*class_dev_p = class_dev;
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error_unreg:
|
|
|
|
class_device_unregister(class_dev);
|
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2005-09-06 16:17:13 -06:00
|
|
|
static int
|
|
|
|
_request_firmware(const struct firmware **firmware_p, const char *name,
|
2005-11-16 01:00:00 -07:00
|
|
|
struct device *device, int uevent)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct class_device *class_dev;
|
|
|
|
struct firmware_priv *fw_priv;
|
|
|
|
struct firmware *firmware;
|
|
|
|
int retval;
|
|
|
|
|
|
|
|
if (!firmware_p)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2005-09-13 02:25:01 -06:00
|
|
|
*firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!firmware) {
|
|
|
|
printk(KERN_ERR "%s: kmalloc(struct firmware) failed\n",
|
|
|
|
__FUNCTION__);
|
|
|
|
retval = -ENOMEM;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2005-09-06 16:17:13 -06:00
|
|
|
retval = fw_setup_class_device(firmware, &class_dev, name, device,
|
2005-11-16 01:00:00 -07:00
|
|
|
uevent);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (retval)
|
|
|
|
goto error_kfree_fw;
|
|
|
|
|
|
|
|
fw_priv = class_get_devdata(class_dev);
|
|
|
|
|
2005-11-16 01:00:00 -07:00
|
|
|
if (uevent) {
|
2005-09-06 16:17:13 -06:00
|
|
|
if (loading_timeout > 0) {
|
|
|
|
fw_priv->timeout.expires = jiffies + loading_timeout * HZ;
|
|
|
|
add_timer(&fw_priv->timeout);
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-11-16 01:00:00 -07:00
|
|
|
kobject_uevent(&class_dev->kobj, KOBJ_ADD);
|
2005-09-06 16:17:13 -06:00
|
|
|
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);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2006-05-23 15:22:38 -06:00
|
|
|
mutex_lock(&fw_lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!fw_priv->fw->size || test_bit(FW_STATUS_ABORT, &fw_priv->status)) {
|
|
|
|
retval = -ENOENT;
|
|
|
|
release_firmware(fw_priv->fw);
|
|
|
|
*firmware_p = NULL;
|
|
|
|
}
|
|
|
|
fw_priv->fw = NULL;
|
2006-05-23 15:22:38 -06:00
|
|
|
mutex_unlock(&fw_lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
class_device_unregister(class_dev);
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
error_kfree_fw:
|
|
|
|
kfree(firmware);
|
|
|
|
*firmware_p = NULL;
|
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
2005-09-06 16:17:13 -06:00
|
|
|
/**
|
2005-11-16 01:00:00 -07:00
|
|
|
* request_firmware: - send firmware request and wait for it
|
2005-10-30 16:03:01 -07:00
|
|
|
* @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
|
2005-09-06 16:17:13 -06:00
|
|
|
* of @name for device @device.
|
|
|
|
*
|
|
|
|
* Should be called from user context where sleeping is allowed.
|
|
|
|
*
|
2005-11-16 01:00:00 -07:00
|
|
|
* @name will be used as $FIRMWARE in the uevent environment and
|
2005-09-06 16:17:13 -06:00
|
|
|
* 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)
|
|
|
|
{
|
2005-11-16 01:00:00 -07:00
|
|
|
int uevent = 1;
|
|
|
|
return _request_firmware(firmware_p, name, device, uevent);
|
2005-09-06 16:17:13 -06:00
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/**
|
|
|
|
* release_firmware: - release the resource associated with a firmware image
|
2005-10-30 16:03:01 -07:00
|
|
|
* @fw: firmware resource to release
|
2005-04-16 16:20:36 -06:00
|
|
|
**/
|
|
|
|
void
|
|
|
|
release_firmware(const struct firmware *fw)
|
|
|
|
{
|
|
|
|
if (fw) {
|
|
|
|
vfree(fw->data);
|
|
|
|
kfree(fw);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Async support */
|
|
|
|
struct firmware_work {
|
|
|
|
struct work_struct work;
|
|
|
|
struct module *module;
|
|
|
|
const char *name;
|
|
|
|
struct device *device;
|
|
|
|
void *context;
|
|
|
|
void (*cont)(const struct firmware *fw, void *context);
|
2005-11-16 01:00:00 -07:00
|
|
|
int uevent;
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
static int
|
|
|
|
request_firmware_work_func(void *arg)
|
|
|
|
{
|
|
|
|
struct firmware_work *fw_work = arg;
|
|
|
|
const struct firmware *fw;
|
2005-11-13 17:07:39 -07:00
|
|
|
int ret;
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!arg) {
|
|
|
|
WARN_ON(1);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
daemonize("%s/%s", "firmware", fw_work->name);
|
2005-11-13 17:07:39 -07:00
|
|
|
ret = _request_firmware(&fw, fw_work->name, fw_work->device,
|
2005-11-16 01:00:00 -07:00
|
|
|
fw_work->uevent);
|
2005-11-13 17:07:39 -07:00
|
|
|
if (ret < 0)
|
|
|
|
fw_work->cont(NULL, fw_work->context);
|
|
|
|
else {
|
|
|
|
fw_work->cont(fw, fw_work->context);
|
|
|
|
release_firmware(fw);
|
|
|
|
}
|
2005-04-16 16:20:36 -06:00
|
|
|
module_put(fw_work->module);
|
|
|
|
kfree(fw_work);
|
2005-11-13 17:07:39 -07:00
|
|
|
return ret;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2005-10-30 16:03:01 -07:00
|
|
|
* request_firmware_nowait: asynchronous version of request_firmware
|
|
|
|
* @module: module requesting the firmware
|
2005-11-16 01:00:00 -07:00
|
|
|
* @uevent: sends uevent to copy the firmware image if this flag
|
2005-10-30 16:03:01 -07:00
|
|
|
* 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.
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
* Asynchronous variant of request_firmware() for contexts where
|
|
|
|
* it is not possible to sleep.
|
|
|
|
**/
|
|
|
|
int
|
|
|
|
request_firmware_nowait(
|
2005-11-16 01:00:00 -07:00
|
|
|
struct module *module, int uevent,
|
2005-04-16 16:20:36 -06:00
|
|
|
const char *name, struct device *device, void *context,
|
|
|
|
void (*cont)(const struct firmware *fw, void *context))
|
|
|
|
{
|
|
|
|
struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work),
|
|
|
|
GFP_ATOMIC);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!fw_work)
|
|
|
|
return -ENOMEM;
|
|
|
|
if (!try_module_get(module)) {
|
|
|
|
kfree(fw_work);
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
|
|
|
|
*fw_work = (struct firmware_work) {
|
|
|
|
.module = module,
|
|
|
|
.name = name,
|
|
|
|
.device = device,
|
|
|
|
.context = context,
|
|
|
|
.cont = cont,
|
2005-11-16 01:00:00 -07:00
|
|
|
.uevent = uevent,
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
ret = kernel_thread(request_firmware_work_func, fw_work,
|
|
|
|
CLONE_FS | CLONE_FILES);
|
|
|
|
|
|
|
|
if (ret < 0) {
|
|
|
|
fw_work->cont(NULL, fw_work->context);
|
2005-11-13 17:07:39 -07:00
|
|
|
module_put(fw_work->module);
|
|
|
|
kfree(fw_work);
|
2005-04-16 16:20:36 -06:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __init
|
|
|
|
firmware_class_init(void)
|
|
|
|
{
|
|
|
|
int error;
|
|
|
|
error = class_register(&firmware_class);
|
|
|
|
if (error) {
|
|
|
|
printk(KERN_ERR "%s: class_register failed\n", __FUNCTION__);
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
error = class_create_file(&firmware_class, &class_attr_timeout);
|
|
|
|
if (error) {
|
|
|
|
printk(KERN_ERR "%s: class_create_file failed\n",
|
|
|
|
__FUNCTION__);
|
|
|
|
class_unregister(&firmware_class);
|
|
|
|
}
|
|
|
|
return error;
|
|
|
|
|
|
|
|
}
|
|
|
|
static void __exit
|
|
|
|
firmware_class_exit(void)
|
|
|
|
{
|
|
|
|
class_unregister(&firmware_class);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(firmware_class_init);
|
|
|
|
module_exit(firmware_class_exit);
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(release_firmware);
|
|
|
|
EXPORT_SYMBOL(request_firmware);
|
|
|
|
EXPORT_SYMBOL(request_firmware_nowait);
|