/*
* firmware_class.c - Multi purpose firmware loading support
*
- * Copyright (c) 2003 Manuel Estrada Sainz <ranty@debian.org>
+ * Copyright (c) 2003 Manuel Estrada Sainz
*
* Please see Documentation/firmware_class/ for more information.
*
#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
-#include <asm/semaphore.h>
+#include <linux/mutex.h>
+#include <linux/kthread.h>
#include <linux/firmware.h>
#include "base.h"
-MODULE_AUTHOR("Manuel Estrada Sainz <ranty@debian.org>");
+#define to_dev(obj) container_of(obj, struct device, kobj)
+
+MODULE_AUTHOR("Manuel Estrada Sainz");
MODULE_DESCRIPTION("Multi purpose firmware loading support");
MODULE_LICENSE("GPL");
FW_STATUS_LOADING,
FW_STATUS_DONE,
FW_STATUS_ABORT,
- FW_STATUS_READY,
- FW_STATUS_READY_NOHOTPLUG,
};
-static int loading_timeout = 10; /* In seconds */
+static int loading_timeout = 60; /* In seconds */
/* fw_lock could be moved to 'struct firmware_priv' but since it is just
* guarding for corner cases a global lock should be OK */
-static DECLARE_MUTEX(fw_lock);
+static DEFINE_MUTEX(fw_lock);
struct firmware_priv {
char fw_id[FIRMWARE_NAME_MAX];
struct timer_list timeout;
};
-static inline void
+#ifdef CONFIG_FW_LOADER
+extern struct builtin_fw __start_builtin_fw[];
+extern struct builtin_fw __end_builtin_fw[];
+#else /* Module case. Avoid ifdefs later; it'll all optimise out */
+static struct builtin_fw *__start_builtin_fw;
+static struct builtin_fw *__end_builtin_fw;
+#endif
+
+static void
fw_load_abort(struct firmware_priv *fw_priv)
{
set_bit(FW_STATUS_ABORT, &fw_priv->status);
static CLASS_ATTR(timeout, 0644, firmware_timeout_show, firmware_timeout_store);
-static void fw_class_dev_release(struct class_device *class_dev);
-int firmware_class_uevent(struct class_device *dev, char **envp,
- int num_envp, char *buffer, int buffer_size);
-
-static struct class firmware_class = {
- .name = "firmware",
- .uevent = firmware_class_uevent,
- .release = fw_class_dev_release,
-};
+static void fw_dev_release(struct device *dev);
-int
-firmware_class_uevent(struct class_device *class_dev, char **envp,
- int num_envp, char *buffer, int buffer_size)
+static int firmware_uevent(struct device *dev, struct kobj_uevent_env *env)
{
- struct firmware_priv *fw_priv = class_get_devdata(class_dev);
- int i = 0, len = 0;
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
- if (!test_bit(FW_STATUS_READY, &fw_priv->status))
- return -ENODEV;
-
- if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
- "FIRMWARE=%s", fw_priv->fw_id))
+ if (add_uevent_var(env, "FIRMWARE=%s", fw_priv->fw_id))
return -ENOMEM;
- if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &len,
- "TIMEOUT=%i", loading_timeout))
+ if (add_uevent_var(env, "TIMEOUT=%i", loading_timeout))
return -ENOMEM;
- envp[i] = NULL;
return 0;
}
-static ssize_t
-firmware_loading_show(struct class_device *class_dev, char *buf)
+static struct class firmware_class = {
+ .name = "firmware",
+ .dev_uevent = firmware_uevent,
+ .dev_release = fw_dev_release,
+};
+
+static ssize_t firmware_loading_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- struct firmware_priv *fw_priv = class_get_devdata(class_dev);
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
int loading = test_bit(FW_STATUS_LOADING, &fw_priv->status);
return sprintf(buf, "%d\n", loading);
}
/**
* firmware_loading_store - set value in the 'loading' control file
- * @class_dev: class_device pointer
+ * @dev: device pointer
+ * @attr: device attribute pointer
* @buf: buffer to scan for loading control value
* @count: number of bytes in @buf
*
* 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
-firmware_loading_store(struct class_device *class_dev,
- const char *buf, size_t count)
+static ssize_t firmware_loading_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
- struct firmware_priv *fw_priv = class_get_devdata(class_dev);
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
int loading = simple_strtol(buf, NULL, 10);
switch (loading) {
case 1:
- down(&fw_lock);
+ mutex_lock(&fw_lock);
if (!fw_priv->fw) {
- up(&fw_lock);
+ mutex_unlock(&fw_lock);
break;
}
vfree(fw_priv->fw->data);
fw_priv->fw->size = 0;
fw_priv->alloc_size = 0;
set_bit(FW_STATUS_LOADING, &fw_priv->status);
- up(&fw_lock);
+ mutex_unlock(&fw_lock);
break;
case 0:
if (test_bit(FW_STATUS_LOADING, &fw_priv->status)) {
}
/* fallthrough */
default:
- printk(KERN_ERR "%s: unexpected value (%d)\n", __FUNCTION__,
- loading);
+ dev_err(dev, "%s: unexpected value (%d)\n", __func__, loading);
/* fallthrough */
case -1:
fw_load_abort(fw_priv);
return count;
}
-static CLASS_DEVICE_ATTR(loading, 0644,
- firmware_loading_show, firmware_loading_store);
+static DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store);
static ssize_t
-firmware_data_read(struct kobject *kobj,
+firmware_data_read(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
- struct class_device *class_dev = to_class_dev(kobj);
- struct firmware_priv *fw_priv = class_get_devdata(class_dev);
+ struct device *dev = to_dev(kobj);
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
struct firmware *fw;
- ssize_t ret_count = count;
+ ssize_t ret_count;
- down(&fw_lock);
+ mutex_lock(&fw_lock);
fw = fw_priv->fw;
if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) {
ret_count = -ENODEV;
goto out;
}
- if (offset > fw->size) {
- ret_count = 0;
- goto out;
- }
- if (offset + ret_count > fw->size)
- ret_count = fw->size - offset;
-
- memcpy(buffer, fw->data + offset, ret_count);
+ ret_count = memory_read_from_buffer(buffer, count, &offset,
+ fw->data, fw->size);
out:
- up(&fw_lock);
+ mutex_unlock(&fw_lock);
return ret_count;
}
fw_realloc_buffer(struct firmware_priv *fw_priv, int min_size)
{
u8 *new_data;
+ int new_size = fw_priv->alloc_size;
if (min_size <= fw_priv->alloc_size)
return 0;
- new_data = vmalloc(fw_priv->alloc_size + PAGE_SIZE);
+ new_size = ALIGN(min_size, PAGE_SIZE);
+ new_data = vmalloc(new_size);
if (!new_data) {
- printk(KERN_ERR "%s: unable to alloc buffer\n", __FUNCTION__);
+ printk(KERN_ERR "%s: unable to alloc buffer\n", __func__);
/* Make sure that we don't keep incomplete data */
fw_load_abort(fw_priv);
return -ENOMEM;
}
- fw_priv->alloc_size += PAGE_SIZE;
+ fw_priv->alloc_size = new_size;
if (fw_priv->fw->data) {
memcpy(new_data, fw_priv->fw->data, fw_priv->fw->size);
vfree(fw_priv->fw->data);
/**
* firmware_data_write - write method for firmware
- * @kobj: kobject for the class_device
+ * @kobj: kobject for the device
+ * @bin_attr: bin_attr structure
* @buffer: buffer being written
* @offset: buffer offset for write in total data store area
* @count: buffer size
* the driver as a firmware image.
**/
static ssize_t
-firmware_data_write(struct kobject *kobj,
+firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
char *buffer, loff_t offset, size_t count)
{
- struct class_device *class_dev = to_class_dev(kobj);
- struct firmware_priv *fw_priv = class_get_devdata(class_dev);
+ struct device *dev = to_dev(kobj);
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
struct firmware *fw;
ssize_t retval;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
- down(&fw_lock);
+ mutex_lock(&fw_lock);
fw = fw_priv->fw;
if (!fw || test_bit(FW_STATUS_DONE, &fw_priv->status)) {
retval = -ENODEV;
if (retval)
goto out;
- memcpy(fw->data + offset, buffer, count);
+ memcpy((u8 *)fw->data + offset, buffer, count);
fw->size = max_t(size_t, offset + count, fw->size);
retval = count;
out:
- up(&fw_lock);
+ mutex_unlock(&fw_lock);
return retval;
}
static struct bin_attribute firmware_attr_data_tmpl = {
- .attr = {.name = "data", .mode = 0644, .owner = THIS_MODULE},
+ .attr = {.name = "data", .mode = 0644},
.size = 0,
.read = firmware_data_read,
.write = firmware_data_write,
};
-static void
-fw_class_dev_release(struct class_device *class_dev)
+static void fw_dev_release(struct device *dev)
{
- struct firmware_priv *fw_priv = class_get_devdata(class_dev);
+ struct firmware_priv *fw_priv = dev_get_drvdata(dev);
kfree(fw_priv);
- kfree(class_dev);
+ kfree(dev);
module_put(THIS_MODULE);
}
fw_load_abort(fw_priv);
}
-static inline void
-fw_setup_class_device_id(struct class_device *class_dev, struct device *dev)
-{
- /* XXX warning we should watch out for name collisions */
- strlcpy(class_dev->class_id, dev->bus_id, BUS_ID_SIZE);
-}
-
-static int
-fw_register_class_device(struct class_device **class_dev_p,
- const char *fw_name, struct device *device)
+static int fw_register_device(struct device **dev_p, const char *fw_name,
+ struct device *device)
{
int retval;
struct firmware_priv *fw_priv = kzalloc(sizeof(*fw_priv),
GFP_KERNEL);
- struct class_device *class_dev = kzalloc(sizeof(*class_dev),
- GFP_KERNEL);
+ struct device *f_dev = kzalloc(sizeof(*f_dev), GFP_KERNEL);
- *class_dev_p = NULL;
+ *dev_p = NULL;
- if (!fw_priv || !class_dev) {
- printk(KERN_ERR "%s: kmalloc failed\n", __FUNCTION__);
+ if (!fw_priv || !f_dev) {
+ dev_err(device, "%s: kmalloc failed\n", __func__);
retval = -ENOMEM;
goto error_kfree;
}
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);
+ dev_set_name(f_dev, dev_name(device));
+ f_dev->parent = device;
+ f_dev->class = &firmware_class;
+ dev_set_drvdata(f_dev, fw_priv);
+ f_dev->uevent_suppress = 1;
+ retval = device_register(f_dev);
if (retval) {
- printk(KERN_ERR "%s: class_device_register failed\n",
- __FUNCTION__);
+ dev_err(device, "%s: device_register failed\n", __func__);
goto error_kfree;
}
- *class_dev_p = class_dev;
+ *dev_p = f_dev;
return 0;
error_kfree:
kfree(fw_priv);
- kfree(class_dev);
+ kfree(f_dev);
return retval;
}
-static int
-fw_setup_class_device(struct firmware *fw, struct class_device **class_dev_p,
- const char *fw_name, struct device *device, int uevent)
+static int fw_setup_device(struct firmware *fw, struct device **dev_p,
+ const char *fw_name, struct device *device,
+ int uevent)
{
- struct class_device *class_dev;
+ struct device *f_dev;
struct firmware_priv *fw_priv;
int retval;
- *class_dev_p = NULL;
- retval = fw_register_class_device(&class_dev, fw_name, device);
+ *dev_p = NULL;
+ retval = fw_register_device(&f_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 = dev_get_drvdata(f_dev);
fw_priv->fw = fw;
- retval = sysfs_create_bin_file(&class_dev->kobj, &fw_priv->attr_data);
+ retval = sysfs_create_bin_file(&f_dev->kobj, &fw_priv->attr_data);
if (retval) {
- printk(KERN_ERR "%s: sysfs_create_bin_file failed\n",
- __FUNCTION__);
+ dev_err(device, "%s: sysfs_create_bin_file failed\n", __func__);
goto error_unreg;
}
- retval = class_device_create_file(class_dev,
- &class_device_attr_loading);
+ retval = device_create_file(f_dev, &dev_attr_loading);
if (retval) {
- printk(KERN_ERR "%s: class_device_create_file failed\n",
- __FUNCTION__);
+ dev_err(device, "%s: device_create_file failed\n", __func__);
goto error_unreg;
}
if (uevent)
- set_bit(FW_STATUS_READY, &fw_priv->status);
- else
- set_bit(FW_STATUS_READY_NOHOTPLUG, &fw_priv->status);
- *class_dev_p = class_dev;
+ f_dev->uevent_suppress = 0;
+ *dev_p = f_dev;
goto out;
error_unreg:
- class_device_unregister(class_dev);
+ device_unregister(f_dev);
out:
return retval;
}
_request_firmware(const struct firmware **firmware_p, const char *name,
struct device *device, int uevent)
{
- struct class_device *class_dev;
+ struct device *f_dev;
struct firmware_priv *fw_priv;
struct firmware *firmware;
+ struct builtin_fw *builtin;
int retval;
if (!firmware_p)
*firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
if (!firmware) {
- printk(KERN_ERR "%s: kmalloc(struct firmware) failed\n",
- __FUNCTION__);
+ dev_err(device, "%s: kmalloc(struct firmware) failed\n",
+ __func__);
retval = -ENOMEM;
goto out;
}
- retval = fw_setup_class_device(firmware, &class_dev, name, device,
- uevent);
+ for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
+ builtin++) {
+ if (strcmp(name, builtin->name))
+ continue;
+ dev_info(device, "firmware: using built-in firmware %s\n",
+ name);
+ firmware->size = builtin->size;
+ firmware->data = builtin->data;
+ return 0;
+ }
+
+ if (uevent)
+ dev_info(device, "firmware: requesting %s\n", name);
+
+ retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
if (retval)
goto error_kfree_fw;
- fw_priv = class_get_devdata(class_dev);
+ fw_priv = dev_get_drvdata(f_dev);
if (uevent) {
if (loading_timeout > 0) {
add_timer(&fw_priv->timeout);
}
- kobject_uevent(&class_dev->kobj, KOBJ_ADD);
+ kobject_uevent(&f_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);
+ mutex_lock(&fw_lock);
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;
- up(&fw_lock);
- class_device_unregister(class_dev);
+ mutex_unlock(&fw_lock);
+ device_unregister(f_dev);
goto out;
error_kfree_fw:
void
release_firmware(const struct firmware *fw)
{
+ struct builtin_fw *builtin;
+
if (fw) {
+ for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
+ builtin++) {
+ if (fw->data == builtin->data)
+ goto free_fw;
+ }
vfree(fw->data);
+ free_fw:
kfree(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
- *
- * Make sure that @data will be available by requesting firmware @name.
- *
- * Note: This will not be possible until some kind of persistence
- * is available.
- **/
-void
-register_firmware(const char *name, const u8 *data, size_t size)
-{
- /* This is meaningless without firmware caching, so until we
- * decide if firmware caching is reasonable just leave it as a
- * noop */
-}
-
/* Async support */
struct firmware_work {
struct work_struct work;
WARN_ON(1);
return 0;
}
- daemonize("%s/%s", "firmware", fw_work->name);
ret = _request_firmware(&fw, fw_work->name, fw_work->device,
fw_work->uevent);
if (ret < 0)
const char *name, struct device *device, void *context,
void (*cont)(const struct firmware *fw, void *context))
{
+ struct task_struct *task;
struct firmware_work *fw_work = kmalloc(sizeof (struct firmware_work),
GFP_ATOMIC);
- int ret;
if (!fw_work)
return -ENOMEM;
.uevent = uevent,
};
- ret = kernel_thread(request_firmware_work_func, fw_work,
- CLONE_FS | CLONE_FILES);
+ task = kthread_run(request_firmware_work_func, fw_work,
+ "firmware/%s", name);
- if (ret < 0) {
+ if (IS_ERR(task)) {
fw_work->cont(NULL, fw_work->context);
module_put(fw_work->module);
kfree(fw_work);
- return ret;
+ return PTR_ERR(task);
}
return 0;
}
int error;
error = class_register(&firmware_class);
if (error) {
- printk(KERN_ERR "%s: class_register failed\n", __FUNCTION__);
+ printk(KERN_ERR "%s: class_register failed\n", __func__);
return error;
}
error = class_create_file(&firmware_class, &class_attr_timeout);
if (error) {
printk(KERN_ERR "%s: class_create_file failed\n",
- __FUNCTION__);
+ __func__);
class_unregister(&firmware_class);
}
return error;
class_unregister(&firmware_class);
}
-module_init(firmware_class_init);
+fs_initcall(firmware_class_init);
module_exit(firmware_class_exit);
EXPORT_SYMBOL(release_firmware);
EXPORT_SYMBOL(request_firmware);
EXPORT_SYMBOL(request_firmware_nowait);
-EXPORT_SYMBOL(register_firmware);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff