brcm: adds support for BCM43341 wifi

brcmfmac: Disable power management

Disable wireless power saving in the brcmfmac WLAN driver. This is a
temporary measure until the connectivity loss resulting from power
saving is resolved.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

brcmfmac: Use original country code as a fallback

Commit 73345fd:

    brcmfmac: Configure country code using device specific settings

prevents region codes from working on devices that lack a region code
translation table. In the event of an absent table, preserve the old
behaviour of using the provided code as-is.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

brcmfmac: Plug memory leak in brcmf_fill_bss_param

See: #1471

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

brcmfmac: do not use internal roaming engine by default

Some evidence of curing disconnects with this disabled, so make it a default.
Can be overridden with module parameter roamoff=0
See: http://projectable.me/optimize-my-pi-wi-fi/

brcmfmac: Change stop_ap sequence

Patch from Broadcom/Cypress to resolve a customer error

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

Revert "brcmfmac: Disable power management"

Shortly after the release of the Pi 3B, a loss of SSH connectivity
over WiFi was traced to the power management handling, so power
management was disabled. And so it has remained ever since.

Enabling power management saves 55mA (~270mW) on a Pi 4B, so is very
much worth the minimal effort of reverting this patch, which was
squashed and rebased many times since then to the commit hash is
meaningless.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c

@@ -3299,7 +3299,7 @@ brcmf_cfg80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *ndev,
 		brcmf_dbg(INFO, "Do not enable power save for P2P clients\n");
 		pm = PM_OFF;
 	}
-	brcmf_dbg(INFO, "power save %s\n", (pm ? "enabled" : "disabled"));
+	brcmf_err("power save %s\n", (pm ? "enabled" : "disabled"));
 
 	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PM, pm);
 	if (err) {

drivers/net/wireless/broadcom/brcm80211/brcmfmac/common.c

@@ -59,7 +59,7 @@ static int brcmf_fcmode;
 module_param_named(fcmode, brcmf_fcmode, int, 0);
 MODULE_PARM_DESC(fcmode, "Mode of firmware signalled flow control");
 
-static int brcmf_roamoff;
+static int brcmf_roamoff = 1;
 module_param_named(roamoff, brcmf_roamoff, int, 0400);
 MODULE_PARM_DESC(roamoff, "Do not use internal roaming engine");
 

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c

@@ -609,6 +609,7 @@ BRCMF_FW_DEF(4329, "brcmfmac4329-sdio");
 BRCMF_FW_DEF(4330, "brcmfmac4330-sdio");
 BRCMF_FW_DEF(4334, "brcmfmac4334-sdio");
 BRCMF_FW_DEF(43340, "brcmfmac43340-sdio");
+BRCMF_FW_DEF(43341, "brcmfmac43341-sdio");
 BRCMF_FW_DEF(4335, "brcmfmac4335-sdio");
 BRCMF_FW_DEF(43362, "brcmfmac43362-sdio");
 BRCMF_FW_DEF(4339, "brcmfmac4339-sdio");
@@ -641,7 +642,7 @@ static const struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
 	BRCMF_FW_ENTRY(BRCM_CC_4330_CHIP_ID, 0xFFFFFFFF, 4330),
 	BRCMF_FW_ENTRY(BRCM_CC_4334_CHIP_ID, 0xFFFFFFFF, 4334),
 	BRCMF_FW_ENTRY(BRCM_CC_43340_CHIP_ID, 0xFFFFFFFF, 43340),
-	BRCMF_FW_ENTRY(BRCM_CC_43341_CHIP_ID, 0xFFFFFFFF, 43340),
+	BRCMF_FW_ENTRY(BRCM_CC_43341_CHIP_ID, 0xFFFFFFFF, 43341),
 	BRCMF_FW_ENTRY(BRCM_CC_4335_CHIP_ID, 0xFFFFFFFF, 4335),
 	BRCMF_FW_ENTRY(BRCM_CC_43362_CHIP_ID, 0xFFFFFFFE, 43362),
 	BRCMF_FW_ENTRY(BRCM_CC_4339_CHIP_ID, 0xFFFFFFFF, 4339),