package/kernel/mac80211/patches/brcm/320-v4.21-0003-brcmfmac-Add-support-for-first-trying-to-get-a-board.patch

   1 From eae8e50669e15002b195177212a6e25afbe7cf4d Mon Sep 17 00:00:00 2001
   2 From: Hans de Goede <hdegoede@redhat.com>
   3 Date: Wed, 10 Oct 2018 13:01:00 +0200
   4 Subject: [PATCH] brcmfmac: Add support for first trying to get a board
   5  specific nvram file
   6
   7 The nvram files which some brcmfmac chips need are board-specific. To be
   8 able to distribute these as part of linux-firmware, so that devices with
   9 such a wifi chip will work OOTB, multiple (one per board) versions must
  10 co-exist under /lib/firmware.
  11
  12 This commit adds support for callers of the brcmfmac/firmware.c code to
  13 pass in a board_type parameter through the request structure.
  14
  15 If that parameter is set then the code will first try to load
  16 chipmodel.board_type.txt before falling back to the old chipmodel.txt name.
  17
  18 Signed-off-by: Hans de Goede <hdegoede@redhat.com>
  19 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  20 ---
  21  .../broadcom/brcm80211/brcmfmac/firmware.c         | 27 +++++++++++++++++++++-
  22  .../broadcom/brcm80211/brcmfmac/firmware.h         |  1 +
  23  2 files changed, 27 insertions(+), 1 deletion(-)
  24
  25 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
  26 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
  27 @@ -532,6 +532,31 @@ static int brcmf_fw_complete_request(con
  28         return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret;
  29  }
  30
  31 +static int brcmf_fw_request_firmware(const struct firmware **fw,
  32 +                                    struct brcmf_fw *fwctx)
  33 +{
  34 +       struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos];
  35 +       int ret;
  36 +
  37 +       /* nvram files are board-specific, first try a board-specific path */
  38 +       if (cur->type == BRCMF_FW_TYPE_NVRAM && fwctx->req->board_type) {
  39 +               char alt_path[BRCMF_FW_NAME_LEN];
  40 +
  41 +               strlcpy(alt_path, cur->path, BRCMF_FW_NAME_LEN);
  42 +               /* strip .txt at the end */
  43 +               alt_path[strlen(alt_path) - 4] = 0;
  44 +               strlcat(alt_path, ".", BRCMF_FW_NAME_LEN);
  45 +               strlcat(alt_path, fwctx->req->board_type, BRCMF_FW_NAME_LEN);
  46 +               strlcat(alt_path, ".txt", BRCMF_FW_NAME_LEN);
  47 +
  48 +               ret = request_firmware(fw, alt_path, fwctx->dev);
  49 +               if (ret == 0)
  50 +                       return ret;
  51 +       }
  52 +
  53 +       return request_firmware(fw, cur->path, fwctx->dev);
  54 +}
  55 +
  56  static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
  57  {
  58         struct brcmf_fw *fwctx = ctx;
  59 @@ -544,7 +569,7 @@ static void brcmf_fw_request_done(const
  60
  61         while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) {
  62                 cur = &fwctx->req->items[fwctx->curpos];
  63 -               request_firmware(&fw, cur->path, fwctx->dev);
  64 +               brcmf_fw_request_firmware(&fw, fwctx);
  65                 ret = brcmf_fw_complete_request(fw, ctx);
  66         }
  67
  68 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
  69 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.h
  70 @@ -70,6 +70,7 @@ struct brcmf_fw_request {
  71         u16 domain_nr;
  72         u16 bus_nr;
  73         u32 n_items;
  74 +       const char *board_type;
  75         struct brcmf_fw_item items[0];
  76  };
  77