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 } 86