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Diffstat (limited to 'samples/firmware_class/firmware_sample_driver.c')
-rw-r--r-- | samples/firmware_class/firmware_sample_driver.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/samples/firmware_class/firmware_sample_driver.c b/samples/firmware_class/firmware_sample_driver.c deleted file mode 100644 index 219a298..0000000 --- a/samples/firmware_class/firmware_sample_driver.c +++ /dev/null @@ -1,121 +0,0 @@ -/* - * 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"); |