#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include "firmware.h"

#define WE_CAN_NEED_FIRMWARE_BEFORE_USERSPACE_IS_AVAILABLE
#ifdef WE_CAN_NEED_FIRMWARE_BEFORE_USERSPACE_IS_AVAILABLE
char __init inkernel_firmware[] = "let's say that this is firmware\n";
#endif

static void sample_firmware_load(char *firmware, int size)
{
	printk("firmware_sample_driver: firmware: %s\n", firmware);
}

static void sample_probe_default(void)
{
	/* uses the default method to get the firmware */
        const struct firmware *fw_entry;
	printk("firmware_sample_driver: a ghost device got inserted :)\n");

        if(request_firmware(&fw_entry, "sample_driver_fw", "ghost0")!=0)
	{
		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)
{
	/* Uses some specific hotplug support to get the firmware from
	 * userspace  directly into the hardware, or via some sysfs file */
	printk("firmware_sample_driver: a ghost device got inserted :)\n");

        if(request_firmware(NULL, "sample_driver_fw", "ghost0")!=0)
	{
		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 int sample_init(void)
{
#ifdef WE_CAN_NEED_FIRMWARE_BEFORE_USERSPACE_IS_AVAILABLE
	register_firmware("sample_driver_fw", inkernel_firmware,
			  sizeof(inkernel_firmware));
#endif
	/* since there is no real hardware insertion I just call the
	 * sample probe functions here */
	sample_probe_specific();
	sample_probe_default();
	return 0;
}
static void __exit sample_exit(void)
{
}

module_init (sample_init);
module_exit (sample_exit);

MODULE_LICENSE("GPL");