1 /*
2 * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 * DEALINGS IN THE SOFTWARE.
21 */
22 #include <core/device.h>
23 #include <core/firmware.h>
24
25 /**
26 * nvkm_firmware_get - load firmware from the official nvidia/chip/ directory
27 * @subdev subdevice that will use that firmware
28 * @fwname name of firmware file to load
29 * @fw firmware structure to load to
30 *
31 * Use this function to load firmware files in the form nvidia/chip/fwname.bin.
32 * Firmware files released by NVIDIA will always follow this format.
33 */
34 int
35 nvkm_firmware_get_version(const struct nvkm_subdev *subdev, const char *fwname,
36 int min_version, int max_version,
37 const struct firmware **fw)
38 {
39 struct nvkm_device *device = subdev->device;
40 char f[64];
41 char cname[16];
42 int i;
43
44 /* Convert device name to lowercase */
45 strncpy(cname, device->chip->name, sizeof(cname));
46 cname[sizeof(cname) - 1] = '\0';
47 i = strlen(cname);
48 while (i) {
49 --i;
50 cname[i] = tolower(cname[i]);
51 }
52
53 for (i = max_version; i >= min_version; i--) {
54 if (i != 0)
55 snprintf(f, sizeof(f), "nvidia/%s/%s-%d.bin", cname, fwname, i);
56 else
57 snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
58
59 if (!firmware_request_nowarn(fw, f, device->dev)) {
60 nvkm_debug(subdev, "firmware \"%s\" loaded\n", f);
61 return i;
62 }
63
64 nvkm_debug(subdev, "firmware \"%s\" unavailable\n", f);
65 }
66
67 nvkm_error(subdev, "failed to load firmware \"%s\"", fwname);
68 return -ENOENT;
69 }
70
71 int
72 nvkm_firmware_get(const struct nvkm_subdev *subdev, const char *fwname,
73 const struct firmware **fw)
74 {
75 return nvkm_firmware_get_version(subdev, fwname, 0, 0, fw);
76 }
77
78 /**
79 * nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
80 */
81 void
82 nvkm_firmware_put(const struct firmware *fw)
83 {
84 release_firmware(fw);
85 }