diff options
Diffstat (limited to 'package/kernel/mac80211/patches/brcm/321-v5.0-0002-brcmfmac-Fix-ccode-from-EFI-nvram-when-necessary.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/brcm/321-v5.0-0002-brcmfmac-Fix-ccode-from-EFI-nvram-when-necessary.patch | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/package/kernel/mac80211/patches/brcm/321-v5.0-0002-brcmfmac-Fix-ccode-from-EFI-nvram-when-necessary.patch b/package/kernel/mac80211/patches/brcm/321-v5.0-0002-brcmfmac-Fix-ccode-from-EFI-nvram-when-necessary.patch deleted file mode 100644 index c2fd620d6c..0000000000 --- a/package/kernel/mac80211/patches/brcm/321-v5.0-0002-brcmfmac-Fix-ccode-from-EFI-nvram-when-necessary.patch +++ /dev/null @@ -1,97 +0,0 @@ -From 29ec3394f0bd85c22674ab6693d92da5e2324610 Mon Sep 17 00:00:00 2001 -From: Hans de Goede <hdegoede@redhat.com> -Date: Thu, 11 Oct 2018 11:51:07 +0200 -Subject: [PATCH] brcmfmac: Fix ccode from EFI nvram when necessary - -In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV" -to specify "worldwide" compatible settings, but these 2 ccode-s do not work -properly. - -I've tested the different known "worldwide" ccode-s used in various nvram -sources with the latest firmwares from linux-firmware for various brcmfmac -models, here is a simplified (*) table with what each setting results in: - -ALL: 12-14 disab, U-NII-1, U-NII-2 no-IR/radar, U-NII-3 -XV: 12-14 no-IR, disables all 5G channels -XY: 12-13 enab, 14 disab, U-NII-1 enab, U-NII-2 no-IR/radar, U-NII-3 disab -X2: 12-13 no-IR, 14 dis, U-NII-1 no-IR, U-NII-2 no-IR/radar, U-NII-3 no-IR - -Where 12,13,14 are 2.4G channels 12-14 and U-NII-1/2/3 are the 3 different -5G channel groups. no-IR is no-Initiate-Radiation, we will never send on -these channels without first having received valid wifi traffic there. - -This immediately shows that both ALL and XV are not as worldwide as we want -them to be. ALL causes channels 12 and 13 to not be available and XV causes -all 5GHz channels to not be available. Also ALL unconditionally enables the -U-NII-1 and U-NII-3 5G groups, while we really should be using no-IR for -these. - -This commit replace XV and ALL with X2, which allows usage of chan 12-13 -and 5G channels, but only after receiving valid wifi traffic there first. - -Note that this configure the firmware's channel limits, the kernels own -regulatory restrictions based on e.g. regulatory info received from the -access-point, will be applied on top of this. - -This fixes channels 12+13 not working on the Asus T200TA and the Lenovo -Mixx 2 8 and 5G channels not working on the Asus T100HA. - -This has been tested on the following models: Acer Iconia Tab8 w1-810, -Acer One 10, Asus T100CHI, Asus T100HA, Asus T100TA, Asus T200TA and a -Lenovo Mixx 2 8. - -*) There are some exceptions to this table: -1) On really old firmware e.g. linux-firmware's 2011 brcmfmac4330-sdio.bin - ALL really means all, unconditionally enabling everything -2) The exact meaning might be influenced by setting the regrev nvram var. - Specifically using ccode=XV + regrev=1 on brcmfmac43241b4 leads to: - 12-14 no-ir, U-NII-1 no-ir, U-NII-2 no-ir/radar, U-NII-3 no-ir - But only on the brcmfmac43241b4 and not on e.g. the brcmfmac43340 - -Tested-by: Hans de Goede <hdegoede@redhat.com> -Signed-off-by: Hans de Goede <hdegoede@redhat.com> -Signed-off-by: Kalle Valo <kvalo@codeaurora.org> ---- - .../broadcom/brcm80211/brcmfmac/firmware.c | 24 ++++++++++++++++++++++ - 1 file changed, 24 insertions(+) - ---- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c -+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c -@@ -447,6 +447,29 @@ struct brcmf_fw { - static void brcmf_fw_request_done(const struct firmware *fw, void *ctx); - - #ifdef CONFIG_EFI -+/* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV" -+ * to specify "worldwide" compatible settings, but these 2 ccode-s do not work -+ * properly. "ccode=ALL" causes channels 12 and 13 to not be available, -+ * "ccode=XV" causes all 5GHz channels to not be available. So we replace both -+ * with "ccode=X2" which allows channels 12+13 and 5Ghz channels in -+ * no-Initiate-Radiation mode. This means that we will never send on these -+ * channels without first having received valid wifi traffic on the channel. -+ */ -+static void brcmf_fw_fix_efi_nvram_ccode(char *data, unsigned long data_len) -+{ -+ char *ccode; -+ -+ ccode = strnstr((char *)data, "ccode=ALL", data_len); -+ if (!ccode) -+ ccode = strnstr((char *)data, "ccode=XV\r", data_len); -+ if (!ccode) -+ return; -+ -+ ccode[6] = 'X'; -+ ccode[7] = '2'; -+ ccode[8] = '\r'; -+} -+ - static u8 *brcmf_fw_nvram_from_efi(size_t *data_len_ret) - { - const u16 name[] = { 'n', 'v', 'r', 'a', 'm', 0 }; -@@ -476,6 +499,7 @@ static u8 *brcmf_fw_nvram_from_efi(size_ - if (err) - goto fail; - -+ brcmf_fw_fix_efi_nvram_ccode(data, data_len); - brcmf_info("Using nvram EFI variable\n"); - - kfree(nvram_efivar); |