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"); | ||