diff options
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 219a29896603..000000000000 --- a/samples/firmware_class/firmware_sample_driver.c +++ /dev/null | |||
| @@ -1,121 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * firmware_sample_driver.c - | ||
| 3 | * | ||
| 4 | * Copyright (c) 2003 Manuel Estrada Sainz | ||
| 5 | * | ||
| 6 | * Sample code on how to use request_firmware() from drivers. | ||
| 7 | * | ||
| 8 | */ | ||
| 9 | |||
| 10 | #include <linux/module.h> | ||
| 11 | #include <linux/kernel.h> | ||
| 12 | #include <linux/init.h> | ||
| 13 | #include <linux/device.h> | ||
| 14 | #include <linux/string.h> | ||
| 15 | #include <linux/firmware.h> | ||
| 16 | |||
| 17 | static struct device ghost_device = { | ||
| 18 | .bus_id = "ghost0", | ||
| 19 | }; | ||
| 20 | |||
| 21 | |||
| 22 | static void sample_firmware_load(char *firmware, int size) | ||
| 23 | { | ||
| 24 | u8 buf[size+1]; | ||
| 25 | memcpy(buf, firmware, size); | ||
| 26 | buf[size] = '\0'; | ||
| 27 | printk(KERN_INFO "firmware_sample_driver: firmware: %s\n", buf); | ||
| 28 | } | ||
| 29 | |||
| 30 | static void sample_probe_default(void) | ||
| 31 | { | ||
| 32 | /* uses the default method to get the firmware */ | ||
| 33 | const struct firmware *fw_entry; | ||
| 34 | int retval; | ||
| 35 | |||
| 36 | printk(KERN_INFO "firmware_sample_driver: " | ||
| 37 | "a ghost device got inserted :)\n"); | ||
| 38 | |||
| 39 | retval = request_firmware(&fw_entry, "sample_driver_fw", &ghost_device); | ||
| 40 | if (retval) { | ||
| 41 | printk(KERN_ERR | ||
| 42 | "firmware_sample_driver: Firmware not available\n"); | ||
| 43 | return; | ||
| 44 | } | ||
| 45 | |||
| 46 | sample_firmware_load(fw_entry->data, fw_entry->size); | ||
| 47 | |||
| 48 | release_firmware(fw_entry); | ||
| 49 | |||
| 50 | /* finish setting up the device */ | ||
| 51 | } | ||
| 52 | |||
| 53 | static void sample_probe_specific(void) | ||
| 54 | { | ||
| 55 | int retval; | ||
| 56 | /* Uses some specific hotplug support to get the firmware from | ||
| 57 | * userspace directly into the hardware, or via some sysfs file */ | ||
| 58 | |||
| 59 | /* NOTE: This currently doesn't work */ | ||
| 60 | |||
| 61 | printk(KERN_INFO "firmware_sample_driver: " | ||
| 62 | "a ghost device got inserted :)\n"); | ||
| 63 | |||
| 64 | retval = request_firmware(NULL, "sample_driver_fw", &ghost_device); | ||
| 65 | if (retval) { | ||
| 66 | printk(KERN_ERR | ||
| 67 | "firmware_sample_driver: Firmware load failed\n"); | ||
| 68 | return; | ||
| 69 | } | ||
| 70 | |||
| 71 | /* request_firmware blocks until userspace finished, so at | ||
| 72 | * this point the firmware should be already in the device */ | ||
| 73 | |||
| 74 | /* finish setting up the device */ | ||
| 75 | } | ||
| 76 | |||
| 77 | static void sample_probe_async_cont(const struct firmware *fw, void *context) | ||
| 78 | { | ||
| 79 | if (!fw) { | ||
| 80 | printk(KERN_ERR | ||
| 81 | "firmware_sample_driver: firmware load failed\n"); | ||
| 82 | return; | ||
| 83 | } | ||
| 84 | |||
| 85 | printk(KERN_INFO "firmware_sample_driver: device pointer \"%s\"\n", | ||
| 86 | (char *)context); | ||
| 87 | sample_firmware_load(fw->data, fw->size); | ||
| 88 | } | ||
| 89 | |||
| 90 | static void sample_probe_async(void) | ||
| 91 | { | ||
| 92 | /* Let's say that I can't sleep */ | ||
| 93 | int error; | ||
| 94 | error = request_firmware_nowait(THIS_MODULE, FW_ACTION_NOHOTPLUG, | ||
| 95 | "sample_driver_fw", &ghost_device, | ||
| 96 | "my device pointer", | ||
| 97 | sample_probe_async_cont); | ||
| 98 | if (error) | ||
| 99 | printk(KERN_ERR "firmware_sample_driver:" | ||
| 100 | " request_firmware_nowait failed\n"); | ||
| 101 | } | ||
| 102 | |||
| 103 | static int __init sample_init(void) | ||
| 104 | { | ||
| 105 | device_initialize(&ghost_device); | ||
| 106 | /* since there is no real hardware insertion I just call the | ||
| 107 | * sample probe functions here */ | ||
| 108 | sample_probe_specific(); | ||
| 109 | sample_probe_default(); | ||
| 110 | sample_probe_async(); | ||
| 111 | return 0; | ||
| 112 | } | ||
| 113 | |||
| 114 | static void __exit sample_exit(void) | ||
| 115 | { | ||
| 116 | } | ||
| 117 | |||
| 118 | module_init(sample_init); | ||
| 119 | module_exit(sample_exit); | ||
| 120 | |||
| 121 | MODULE_LICENSE("GPL"); | ||
