LXR linux/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 */
  34int
  35nvkm_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 */
  58void
  59nvkm_firmware_put(const struct firmware *fw)
  60{
  61        release_firmware(fw);
  62}
  63