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openmptcprouter/root/target/linux/bcm27xx/patches-5.14/0233-brcmfmac-Prefer-a-ccode-from-OTP-over-nvram-file.patch
Ycarus (Yannick Chabanois) 5c593832cc Add 5.14 patches for RPI
2021-10-01 16:58:58 +02:00

136 lines
4.3 KiB
Diff

From 3c96bca51ed61dfdbfb759294be8216fa79691fe Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Fri, 26 Jun 2020 11:51:05 +0100
Subject: [PATCH 233/552] brcmfmac: Prefer a ccode from OTP over nvram file
Allow the nvram file to set a default ccode (regulatory domain) without
overriding one set in OTP.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
.../broadcom/brcm80211/brcmfmac/cfg80211.c | 39 +++++++++++++------
.../broadcom/brcm80211/brcmfmac/firmware.c | 21 +++++++++-
2 files changed, 47 insertions(+), 13 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index 75664ca2412a..c52dd258043c 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -9,6 +9,7 @@
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/vmalloc.h>
+#include <linux/ctype.h>
#include <net/cfg80211.h>
#include <net/netlink.h>
#include <uapi/linux/if_arp.h>
@@ -7505,31 +7506,45 @@ static void brcmf_cfg80211_reg_notifier(struct wiphy *wiphy,
struct brcmf_if *ifp = brcmf_get_ifp(cfg->pub, 0);
struct brcmf_pub *drvr = cfg->pub;
struct brcmf_fil_country_le ccreq;
+ char *alpha2;
s32 err;
int i;
- /* The country code gets set to "00" by default at boot, ignore */
- if (req->alpha2[0] == '0' && req->alpha2[1] == '0')
+ err = brcmf_fil_iovar_data_get(ifp, "country", &ccreq, sizeof(ccreq));
+ if (err) {
+ bphy_err(drvr, "Country code iovar returned err = %d\n", err);
return;
+ }
+
+ /* The country code gets set to "00" by default at boot - substitute
+ * any saved ccode from the nvram file unless there is a valid code
+ * already set.
+ */
+ alpha2 = req->alpha2;
+ if (alpha2[0] == '0' && alpha2[1] == '0') {
+ extern char saved_ccode[2];
+
+ if ((isupper(ccreq.country_abbrev[0]) &&
+ isupper(ccreq.country_abbrev[1])) ||
+ !saved_ccode[0])
+ return;
+ alpha2 = saved_ccode;
+ pr_debug("brcmfmac: substituting saved ccode %c%c\n",
+ alpha2[0], alpha2[1]);
+ }
/* ignore non-ISO3166 country codes */
for (i = 0; i < 2; i++)
- if (req->alpha2[i] < 'A' || req->alpha2[i] > 'Z') {
+ if (alpha2[i] < 'A' || alpha2[i] > 'Z') {
bphy_err(drvr, "not an ISO3166 code (0x%02x 0x%02x)\n",
- req->alpha2[0], req->alpha2[1]);
+ alpha2[0], alpha2[1]);
return;
}
brcmf_dbg(TRACE, "Enter: initiator=%d, alpha=%c%c\n", req->initiator,
- req->alpha2[0], req->alpha2[1]);
-
- err = brcmf_fil_iovar_data_get(ifp, "country", &ccreq, sizeof(ccreq));
- if (err) {
- bphy_err(drvr, "Country code iovar returned err = %d\n", err);
- return;
- }
+ alpha2[0], alpha2[1]);
- err = brcmf_translate_country_code(ifp->drvr, req->alpha2, &ccreq);
+ err = brcmf_translate_country_code(ifp->drvr, alpha2, &ccreq);
if (err)
return;
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
index d40104b8df55..5e14df09f873 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -10,6 +10,7 @@
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/bcm47xx_nvram.h>
+#include <linux/ctype.h>
#include "debug.h"
#include "firmware.h"
@@ -30,6 +31,8 @@ enum nvram_parser_state {
END
};
+char saved_ccode[2] = {};
+
/**
* struct nvram_parser - internal info for parser.
*
@@ -543,10 +546,26 @@ static int brcmf_fw_request_nvram_done(const struct firmware *fw, void *ctx)
goto fail;
}
- if (data)
+ if (data) {
+ char *ccode = strnstr((char *)data, "ccode=", data_len);
+ /* Ensure this is a whole token */
+ if (ccode && ((void *)ccode == (void *)data || isspace(ccode[-1]))) {
+ /* Comment out the line */
+ ccode[0] = '#';
+ ccode += 6;
+ if (isupper(ccode[0]) && isupper(ccode[1]) &&
+ isspace(ccode[2])) {
+ pr_debug("brcmfmac: intercepting ccode=%c%c\n",
+ ccode[0], ccode[1]);
+ saved_ccode[0] = ccode[0];
+ saved_ccode[1] = ccode[1];
+ }
+ };
+
nvram = brcmf_fw_nvram_strip(data, data_len, &nvram_length,
fwctx->req->domain_nr,
fwctx->req->bus_nr);
+ }
if (free_bcm47xx_nvram)
bcm47xx_nvram_release_contents(data);
--
2.33.0