drivers/gpu/drm/nouveau/nvkm/core/firmware.c

   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  * @device      device 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(struct nvkm_device *device, const char *fwname,
  36                   const struct firmware **fw)
  37 {
  38         char f[64];
  39         char cname[16];
  40         int i;
  41
  42         /* Convert device name to lowercase */
  43         strncpy(cname, device->chip->name, sizeof(cname));
  44         cname[sizeof(cname) - 1] = '\0';
  45         i = strlen(cname);
  46         while (i) {
  47                 --i;
  48                 cname[i] = tolower(cname[i]);
  49         }
  50
  51         snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
  52         return request_firmware(fw, f, device->dev);
  53 }
  54
  55 /**
  56  * nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
  57  */
  58 void
  59 nvkm_firmware_put(const struct firmware *fw)
  60 {
  61         release_firmware(fw);
  62 }