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mac80211: ath10k: search DT for BDF variant info 

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 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 <sven.eckelmann@open-mesh.com>
owl
Sven Eckelmann 2017-11-30 14:30:06 +01:00 committed by Mathias Kresin
parent 7293499f71
commit f39fc67c8e
1 changed files with 106 additions and 0 deletions
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106
package/kernel/mac80211/patches/937-ath10k-calibration-variant.patch Normal file
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@ -0,0 +1,106 @@
From: Sven Eckelmann <sven.eckelmann@openmesh.com>
Date: Fri, 10 Mar 2017 09:06:15 +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 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 <sven.eckelmann@openmesh.com>
Origin: other, https://patchwork.kernel.org/patch/9615185/
---
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -860,6 +860,25 @@ 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;
+
+ strscpy(ar->id.bdf_ext, variant, sizeof(ar->id.bdf_ext));
+
+ return 0;
+}
+
static int ath10k_download_and_run_otp(struct ath10k *ar)
{
u32 result, address = ar->hw_params.patch_load_addr;
@@ -1231,19 +1250,19 @@ 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 +2362,11 @@ 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) {