projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #include <linux/vmalloc.h> |
| 2 | #include <linux/module.h> | |
| 3 | #include <linux/fs.h> | |
| 4 | #include <linux/mm.h> | |
| 5 | #include <linux/slab.h> | |
| e8edc6e0 | 6 | #include <linux/sched.h> |
| 1da177e4 | 7 | #include <asm/uaccess.h> |
| b9dd6ffc | 8 | #include "oss/sound_firmware.h" |
| 1da177e4 LT |
9 | |
| 10 | static int do_mod_firmware_load(const char *fn, char **fp) | |
| 11 | { | |
| 12 | struct file* filp; | |
| 13 | long l; | |
| 14 | char *dp; | |
| 15 | loff_t pos; | |
| 16 | ||
| 17 | filp = filp_open(fn, 0, 0); | |
| 18 | if (IS_ERR(filp)) | |
| 19 | { | |
| 20 | printk(KERN_INFO "Unable to load '%s'.\n", fn); | |
| 21 | return 0; | |
| 22 | } | |
| 7bc56323 | 23 | l = filp->f_path.dentry->d_inode->i_size; |
| 1da177e4 LT |
24 | if (l <= 0 || l > 131072) |
| 25 | { | |
| 26 | printk(KERN_INFO "Invalid firmware '%s'\n", fn); | |
| 27 | filp_close(filp, current->files); | |
| 28 | return 0; | |
| 29 | } | |
| 30 | dp = vmalloc(l); | |
| 31 | if (dp == NULL) | |
| 32 | { | |
| 33 | printk(KERN_INFO "Out of memory loading '%s'.\n", fn); | |
| 34 | filp_close(filp, current->files); | |
| 35 | return 0; | |
| 36 | } | |
| 37 | pos = 0; | |
| 38 | if (vfs_read(filp, dp, l, &pos) != l) | |
| 39 | { | |
| 40 | printk(KERN_INFO "Failed to read '%s'.\n", fn); | |
| 41 | vfree(dp); | |
| 42 | filp_close(filp, current->files); | |
| 43 | return 0; | |
| 44 | } | |
| 45 | filp_close(filp, current->files); | |
| 46 | *fp = dp; | |
| 47 | return (int) l; | |
| 48 | } | |
| 49 | ||
| 50 | /** | |
| 51 | * mod_firmware_load - load sound driver firmware | |
| 52 | * @fn: filename | |
| 53 | * @fp: return for the buffer. | |
| 54 | * | |
| 55 | * Load the firmware for a sound module (up to 128K) into a buffer. | |
| 56 | * The buffer is returned in *fp. It is allocated with vmalloc so is | |
| 57 | * virtually linear and not DMAable. The caller should free it with | |
| 58 | * vfree when finished. | |
| 59 | * | |
| 60 | * The length of the buffer is returned on a successful load, the | |
| 61 | * value zero on a failure. | |
| 62 | * | |
| 63 | * Caution: This API is not recommended. Firmware should be loaded via | |
| b9dd6ffc | 64 | * request_firmware. |
| 1da177e4 LT |
65 | */ |
| 66 | ||
| 67 | int mod_firmware_load(const char *fn, char **fp) | |
| 68 | { | |
| 69 | int r; | |
| 70 | mm_segment_t fs = get_fs(); | |
| 71 | ||
| 72 | set_fs(get_ds()); | |
| 73 | r = do_mod_firmware_load(fn, fp); | |
| 74 | set_fs(fs); | |
| 75 | return r; | |
| 76 | } | |
| b9dd6ffc | 77 | EXPORT_SYMBOL(mod_firmware_load); |
| 1da177e4 | 78 | |
| b9dd6ffc | 79 | MODULE_LICENSE("GPL"); |