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- From d06f26c5c8a41f246a9c40862a77a55725cedbd3 Mon Sep 17 00:00:00 2001
- From: Sven Eckelmann <[email protected]>
- Date: Fri, 8 Dec 2017 11:37:42 +0100
- Subject: ath10k: search DT for qcom,ath10k-calibration-variant
- Board Data File (BDF) is loaded upon driver boot-up procedure. The right
- board data file is identified on QCA4019 using bus, bmi-chip-id and
- bmi-board-id.
- The problem, however, can occur when the (default) board data file cannot
- fulfill with the vendor requirements and it is necessary to use a different
- board data file.
- This problem was solved for SMBIOS by adding a special SMBIOS type 0xF8.
- Something similar has to be provided for systems without SMBIOS but with
- device trees. No solution was specified by QCA and therefore a new one has
- to be found for ath10k.
- The device tree requires addition strings to define the variant name
- wifi@a000000 {
- status = "okay";
- qcom,ath10k-calibration-variant = "RT-AC58U";
- };
- wifi@a800000 {
- status = "okay";
- qcom,ath10k-calibration-variant = "RT-AC58U";
- };
- This would create the boarddata identifiers for the board-2.bin search
- * bus=ahb,bmi-chip-id=0,bmi-board-id=16,variant=RT-AC58U
- * bus=ahb,bmi-chip-id=0,bmi-board-id=17,variant=RT-AC58U
- Signed-off-by: Sven Eckelmann <[email protected]>
- Signed-off-by: Kalle Valo <[email protected]>
- ---
- drivers/net/wireless/ath/ath10k/core.c | 40 ++++++++++++++++++++++++++++------
- 1 file changed, 33 insertions(+), 7 deletions(-)
- --- a/drivers/net/wireless/ath/ath10k/core.c
- +++ b/drivers/net/wireless/ath/ath10k/core.c
- @@ -860,6 +860,28 @@ static int ath10k_core_check_smbios(stru
- return 0;
- }
-
- +static int ath10k_core_check_dt(struct ath10k *ar)
- +{
- + struct device_node *node;
- + const char *variant = NULL;
- +
- + node = ar->dev->of_node;
- + if (!node)
- + return -ENOENT;
- +
- + of_property_read_string(node, "qcom,ath10k-calibration-variant",
- + &variant);
- + if (!variant)
- + return -ENODATA;
- +
- + if (strscpy(ar->id.bdf_ext, variant, sizeof(ar->id.bdf_ext)) < 0)
- + ath10k_dbg(ar, ATH10K_DBG_BOOT,
- + "bdf variant string is longer than the buffer can accommodate (variant: %s)\n",
- + variant);
- +
- + return 0;
- +}
- +
- static int ath10k_download_and_run_otp(struct ath10k *ar)
- {
- u32 result, address = ar->hw_params.patch_load_addr;
- @@ -1231,19 +1253,19 @@ static int ath10k_core_create_board_name
- /* strlen(',variant=') + strlen(ar->id.bdf_ext) */
- char variant[9 + ATH10K_SMBIOS_BDF_EXT_STR_LENGTH] = { 0 };
-
- + if (ar->id.bdf_ext[0] != '\0')
- + scnprintf(variant, sizeof(variant), ",variant=%s",
- + ar->id.bdf_ext);
- +
- if (ar->id.bmi_ids_valid) {
- scnprintf(name, name_len,
- - "bus=%s,bmi-chip-id=%d,bmi-board-id=%d",
- + "bus=%s,bmi-chip-id=%d,bmi-board-id=%d%s",
- ath10k_bus_str(ar->hif.bus),
- ar->id.bmi_chip_id,
- - ar->id.bmi_board_id);
- + ar->id.bmi_board_id, variant);
- goto out;
- }
-
- - if (ar->id.bdf_ext[0] != '\0')
- - scnprintf(variant, sizeof(variant), ",variant=%s",
- - ar->id.bdf_ext);
- -
- scnprintf(name, name_len,
- "bus=%s,vendor=%04x,device=%04x,subsystem-vendor=%04x,subsystem-device=%04x%s",
- ath10k_bus_str(ar->hif.bus),
- @@ -2343,7 +2365,11 @@ static int ath10k_core_probe_fw(struct a
-
- ret = ath10k_core_check_smbios(ar);
- if (ret)
- - ath10k_dbg(ar, ATH10K_DBG_BOOT, "bdf variant name not set.\n");
- + ath10k_dbg(ar, ATH10K_DBG_BOOT, "SMBIOS bdf variant name not set.\n");
- +
- + ret = ath10k_core_check_dt(ar);
- + if (ret)
- + ath10k_dbg(ar, ATH10K_DBG_BOOT, "DT bdf variant name not set.\n");
-
- ret = ath10k_core_fetch_board_file(ar);
- if (ret) {
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