firmware: remove broken example files

/*

 * firmware_sample_driver.c -

 *

 * Copyright (c) 2003 Manuel Estrada Sainz

 *

 * Sample code on how to use request_firmware() from drivers.

 *

 */

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/string.h>

#include <linux/firmware.h>

static struct device ghost_device = {

	.bus_id    = "ghost0",

};

static void sample_firmware_load(char *firmware, int size)

{

	u8 buf[size+1];

	memcpy(buf, firmware, size);

	buf[size] = '\0';

	printk(KERN_INFO "firmware_sample_driver: firmware: %s\n", buf);

}

static void sample_probe_default(void)

{

	/* uses the default method to get the firmware */

	const struct firmware *fw_entry;

	int retval;

	printk(KERN_INFO "firmware_sample_driver: "

		"a ghost device got inserted :)\n");

	retval = request_firmware(&fw_entry, "sample_driver_fw", &ghost_device);

	if (retval) {

		printk(KERN_ERR

		       "firmware_sample_driver: Firmware not available\n");

		return;

	}

	sample_firmware_load(fw_entry->data, fw_entry->size);

	release_firmware(fw_entry);

	/* finish setting up the device */

}

static void sample_probe_specific(void)

{

	int retval;

	/* Uses some specific hotplug support to get the firmware from

	 * userspace  directly into the hardware, or via some sysfs file */

	/* NOTE: This currently doesn't work */

	printk(KERN_INFO "firmware_sample_driver: "

		"a ghost device got inserted :)\n");

	retval = request_firmware(NULL, "sample_driver_fw", &ghost_device);

	if (retval) {

		printk(KERN_ERR

		       "firmware_sample_driver: Firmware load failed\n");

		return;

	}

	/* request_firmware blocks until userspace finished, so at

	 * this point the firmware should be already in the device */

	/* finish setting up the device */

}

static void sample_probe_async_cont(const struct firmware *fw, void *context)

{

	if (!fw) {

		printk(KERN_ERR

		       "firmware_sample_driver: firmware load failed\n");

		return;

	}

	printk(KERN_INFO "firmware_sample_driver: device pointer \"%s\"\n",

	       (char *)context);

	sample_firmware_load(fw->data, fw->size);

}

static void sample_probe_async(void)

{

	/* Let's say that I can't sleep */

	int error;

	error = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG,

					"sample_driver_fw", &ghost_device,

					"my device pointer",

					sample_probe_async_cont);

	if (error)

		printk(KERN_ERR "firmware_sample_driver:"

		       " request_firmware_nowait failed\n");

}

static int __init sample_init(void)

{

	device_initialize(&ghost_device);

	/* since there is no real hardware insertion I just call the

	 * sample probe functions here */

	sample_probe_specific();

	sample_probe_default();

	sample_probe_async();

	return 0;

}

static void __exit sample_exit(void)

{

}

module_init(sample_init);

module_exit(sample_exit);

MODULE_LICENSE("GPL");

/*

 * firmware_sample_firmware_class.c -

 *

 * Copyright (c) 2003 Manuel Estrada Sainz

 *

 * NOTE: This is just a probe of concept, if you think that your driver would

 * be well served by this mechanism please contact me first.

 *

 * DON'T USE THIS CODE AS IS

 *

 */

#include <linux/device.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/timer.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/firmware.h>

MODULE_AUTHOR("Manuel Estrada Sainz");

MODULE_DESCRIPTION("Hackish sample for using firmware class directly");

MODULE_LICENSE("GPL");

static inline struct class_device *to_class_dev(struct kobject *obj)

{

	return container_of(obj, struct class_device, kobj);

}

static inline

struct class_device_attribute *to_class_dev_attr(struct attribute *_attr)

{

	return container_of(_attr, struct class_device_attribute, attr);

}

struct firmware_priv {

	char fw_id[FIRMWARE_NAME_MAX];

	s32 loading:2;

	u32 abort:1;

};

static ssize_t firmware_loading_show(struct class_device *class_dev, char *buf)

{

	struct firmware_priv *fw_priv = class_get_devdata(class_dev);

	return sprintf(buf, "%d\n", fw_priv->loading);

}

static ssize_t firmware_loading_store(struct class_device *class_dev,

				      const char *buf, size_t count)

{

	struct firmware_priv *fw_priv = class_get_devdata(class_dev);

	int prev_loading = fw_priv->loading;

	fw_priv->loading = simple_strtol(buf, NULL, 10);

	switch (fw_priv->loading) {

	case -1:

		/* abort load an panic */

		break;

	case 1:

		/* setup load */

		break;

	case 0:

		if (prev_loading == 1) {

			/* finish load and get the device back to working

			 * state */

		}

		break;

	}

	return count;

}

static CLASS_DEVICE_ATTR(loading, 0644,

			 firmware_loading_show, firmware_loading_store);

static ssize_t 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);

	/* read from the devices firmware memory */

	return count;

}

static ssize_t 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);

	/* write to the devices firmware memory */

	return count;

}

static struct bin_attribute firmware_attr_data = {

	.attr = {.name = "data", .mode = 0644},

	.size = 0,

	.read = firmware_data_read,

	.write = firmware_data_write,

};

static int fw_setup_class_device(struct class_device *class_dev,

				 const char *fw_name,

				 struct device *device)

{

	int retval;

	struct firmware_priv *fw_priv;

	fw_priv = kzalloc(sizeof(struct firmware_priv),	GFP_KERNEL);

	if (!fw_priv) {

		retval = -ENOMEM;

		goto out;

	}

	memset(class_dev, 0, sizeof(*class_dev));

	strncpy(fw_priv->fw_id, fw_name, FIRMWARE_NAME_MAX);

	fw_priv->fw_id[FIRMWARE_NAME_MAX-1] = '\0';

	strncpy(class_dev->class_id, device->bus_id, BUS_ID_SIZE);

	class_dev->class_id[BUS_ID_SIZE-1] = '\0';

	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",

		       __func__);

		goto error_free_fw_priv;

	}

	retval = sysfs_create_bin_file(&class_dev->kobj, &firmware_attr_data);

	if (retval) {

		printk(KERN_ERR "%s: sysfs_create_bin_file failed\n",

		       __func__);

		goto error_unreg_class_dev;

	}

	retval = class_device_create_file(class_dev,

					  &class_device_attr_loading);

	if (retval) {

		printk(KERN_ERR "%s: class_device_create_file failed\n",

		       __func__);

		goto error_remove_data;

	}

	goto out;

error_remove_data:

	sysfs_remove_bin_file(&class_dev->kobj, &firmware_attr_data);

error_unreg_class_dev:

	class_device_unregister(class_dev);

error_free_fw_priv:

	kfree(fw_priv);

out:

	return retval;

}

static void fw_remove_class_device(struct class_device *class_dev)

{

	struct firmware_priv *fw_priv = class_get_devdata(class_dev);

	class_device_remove_file(class_dev, &class_device_attr_loading);

	sysfs_remove_bin_file(&class_dev->kobj, &firmware_attr_data);

	class_device_unregister(class_dev);

}

static struct class_device *class_dev;

static struct device my_device = {

	.bus_id    = "my_dev0",

};

static int __init firmware_sample_init(void)

{

	int error;

	device_initialize(&my_device);

	class_dev = kmalloc(sizeof(struct class_device), GFP_KERNEL);

	if (!class_dev)

		return -ENOMEM;

	error = fw_setup_class_device(class_dev, "my_firmware_image",

				      &my_device);

	if (error) {

		kfree(class_dev);

		return error;

	}

	return 0;

}

static void __exit firmware_sample_exit(void)

{

	struct firmware_priv *fw_priv = class_get_devdata(class_dev);

	fw_remove_class_device(class_dev);

	kfree(fw_priv);

	kfree(class_dev);

}

module_init(firmware_sample_init);

module_exit(firmware_sample_exit);