[PATCH] brcmfmac: use ISO3166 country code and 0 rev as fallback on some devices
From: Hans de Goede <hidden>
Date: 2021-12-18 18:56:57
This is a second attempt at honering the country code send out by access
points. This was first added in commit b0b524f079a2 ("brcmfmac: use
ISO3166 country code and 0 rev as fallback").
Subsequently this was reverted in commit 151a7c12c4fc ("Revert "brcmfmac:
use ISO3166 country code and 0 rev as fallback""), because it was causing
issues with AP mode on some brcmfmac models (specifically on BCM4359/9).
Many devices ship with a nvram ccode value of X2/XT/XU/XV/ALL which are
all special world-wide compatibility ccode-s. Most of these world-wide
ccode-s allow passive scan mode only for 2.4GHz channels 12-14,
only enabling them when an AP is seen on them.
But at least on brcmfmac43455 devices this is not working correctly, these
do not see accesspoints on channels 12-14 unless the ccode is changes to
a country where these channels are allowed.
Translating received country codes to an ISO3166 country code and 0 rev
ccreq fixes devices using a brcmfmac43455 with a X2/XT/XU/XV/ALL ccode
not seeing accesspoints on channels 12-14.
To avoid this causing issues on other brcmfmac models again, the
fallback is limited to only brcmfmac4345* chips this time.
Cc: Shawn Guo <redacted>
Cc: Soeren Moch <redacted>
Cc: Fabio Aiuto <redacted>
Signed-off-by: Hans de Goede <redacted>
---
.../broadcom/brcm80211/brcmfmac/cfg80211.c | 33 +++++++++++++++----
1 file changed, 27 insertions(+), 6 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index fb727778312c..c10ac839dd26 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c@@ -16,6 +16,7 @@ #include <brcmu_utils.h> #include <defs.h> #include <brcmu_wifi.h> +#include <brcm_hw_ids.h> #include "core.h" #include "debug.h" #include "tracepoint.h"
@@ -7455,6 +7456,16 @@ int brcmf_cfg80211_wait_vif_event(struct brcmf_cfg80211_info *cfg, vif_event_equals(event, action), timeout); } +static bool brmcf_use_iso3166_ccode_fallback(struct brcmf_pub *drvr) +{ + switch (drvr->bus_if->chip) { + case BRCM_CC_4345_CHIP_ID: + return true; + default: + return false; + } +} + static s32 brcmf_translate_country_code(struct brcmf_pub *drvr, char alpha2[2], struct brcmf_fil_country_le *ccreq) {
@@ -7463,18 +7474,28 @@ static s32 brcmf_translate_country_code(struct brcmf_pub *drvr, char alpha2[2], s32 found_index; int i; - country_codes = drvr->settings->country_codes; - if (!country_codes) { - brcmf_dbg(TRACE, "No country codes configured for device\n"); - return -EINVAL; - } - if ((alpha2[0] == ccreq->country_abbrev[0]) && (alpha2[1] == ccreq->country_abbrev[1])) { brcmf_dbg(TRACE, "Country code already set\n"); return -EAGAIN; } + country_codes = drvr->settings->country_codes; + if (!country_codes) { + if (brmcf_use_iso3166_ccode_fallback(drvr)) { + brcmf_dbg(TRACE, "No country codes configured for device, using ISO3166 code and 0 rev\n"); + memset(ccreq, 0, sizeof(*ccreq)); + ccreq->country_abbrev[0] = alpha2[0]; + ccreq->country_abbrev[1] = alpha2[1]; + ccreq->ccode[0] = alpha2[0]; + ccreq->ccode[1] = alpha2[1]; + return 0; + } + + brcmf_dbg(TRACE, "No country codes configured for device\n"); + return -EINVAL; + } + found_index = -1; for (i = 0; i < country_codes->table_size; i++) { cc = &country_codes->table[i];
--
2.33.1