xavier nx平台调试sdio WiFi模块

1. 前言

使用WiFi板与Jetson Xavier NX模块连接调试。
模块是BCM43455模块，使用的是SDIO接口。

dts定义如下：

sdhci@3440000 { 
           #address-cells = <1>;
           #size-cells = <0>;
            compatible = "nvidia,tegra194-sdhci";
            reg = <0x0 0x3440000 0x0 0x00020000>;
            interrupts = < 0 TEGRA194_IRQ_SDMMC3 0x04>;
            iommus = <&smmu TEGRA_SID_SDMMC3A>;
            dma-coherent;
            max-clk-limit = <208000000>;
            bus-width = <4>;
            cap-mmc-highspeed;
            cap-sd-highspeed;
            sd-uhs-sdr104;
            sd-uhs-sdr50;
            sd-uhs-sdr25;
            sd-uhs-sdr12;
            mmc-ddr-1_8v;
            mmc-hs200-1_8v;
            cd-inverted;
            nvidia,min-tap-delay = <96>;
            nvidia,max-tap-delay = <139>;
            nvidia,vqmmc-always-on;
            pwrdet-support;
            pinctrl-names = "sdmmc_e_33v_enable", "sdmmc_e_33v_disable";
            pinctrl-0 = <&sdmmc3_e_33V_enable>;
            pinctrl-1 = <&sdmmc3_e_33V_disable>;
            ignore-pm-notify;
            resets = <&bpmp_resets TEGRA194_RESET_SDMMC3>;
            reset-names = "sdhci";
            pll_source = "pll_p", "pll_c4_muxed";
            nvidia,set-parent-clk;
            nvidia,parent_clk_list = "pll_p", "pll_p", "pll_p", "pll_p", "pll_p", "pll_c4_muxed", "pll_c4_muxed", "pll_c4_muxed", "pll_c4_muxed", "pll_c4_muxed", "NULL";
            clocks = <&bpmp_clks TEGRA194_CLK_SDMMC3>,
                    <&bpmp_clks TEGRA194_CLK_PLLP_OUT0>,
                    <&bpmp_clks TEGRA194_CLK_PLLC4_MUXED>,
                    <&bpmp_clks TEGRA194_CLK_SDMMC_LEGACY_TM>;
            clock-names = "sdmmc", "pll_p", "pll_c4_muxed", "sdmmc_legacy_tm";
            uhs-mask = <0x08>;
            nvidia,en-periodic-calib;
           status = "okay";
           brcmf: wifi@0 {
                   reg = <0>;
                   compatible = "brcm,bcm4329-fmac";
           };
   };

sdhci正常注册

[ 5.285300] sdhci-tegra 3440000.sdhci: Client registration for eMC Successful

但WiFi模块探测本身没有发生

WIFI固件如下

~$ ls -l /lib/firmware/brcm/brcmfmac43455-sdio.bin
-rw-r–r-- 1 root root 488193 Mar 30 2017 /lib/firmware/brcm/brcmfmac43455-sdio.bin

开启内核配置

CONFIG_CFG80211=y
CONFIG_BRCMUTIL=y
CONFIG_BRCMFMAC=y
CONFIG_BRCMFMAC_SDIO=y

2. 查询 driver & dmesg & 硬件

（1）/sys/bus/sdio/drivers

$ ls -l /sys/bus/sdio/drivers
total 0
drwxr-xr-x 2 root root 0 Sep 24 14:04 brcmfmac
$ ls -l /sys/bus/sdio/devices
total 0

（2）查询dmesg

可能SDIO没有被枚举出来
问题不是fw或客户端驱动程序
这是TX2上的sdio wifi日志

[ 1.461159] sdhci-tegra 3440000.sdhci: Client registration for eMC Successful
[ 1.506029] mmc1: SDHCI controller on 3440000.sdhci [3440000.sdhci] using ADMA 64-bit with 64 bit addr
[ 1.757516] mmc1: hw tuning done …
[ 1.761158] mmc1: new ultra high speed SDR104 SDIO card at address 0001

（3）检测硬件
在启动时能看到时钟

原理图

3. 咨询nvidia FAE

提到Xavier系列不支持SDIO wifi

我们的软件不验证任何类型的wifi卡在Xavier系列芯片上的SDIO，
我们没有这样做的计划。
因此，你仍然可以尝试，但我们可能不会提供太多经验，因
为它也没有经过我们这边的验证。
只有TX1和TX2是验证过sdio WiFi的。

我不能给你一个明确的“是”或“否”的答案，因为这是我们尚未核实的事情，
目前也没有相关计划。
也许其他用户也有成功的经验。
但是从官方支持的角度来看，我们建议用户在Xavier系列中使用Wifi而不是SDIO

4. 调试记录

（1）修改sdhci 设备树

 sdhci@700b0400 { /* SDMMC3 for Wifi */
           #address-cells = <1>;
            #size-cells = <0>;
           force-non-removable-rescan;
           non-removable;
           status = "okay";

           brcmf: brcmf@0 {
                   reg = <0>;
                   compatible = "brcm,bcm4329-fmac";
           };
   };

有时我在mmc1上得到这个错误，

[ 5.466191] mmc1: CMD CRC or end bit error, int mask 0xc0001
[ 5.466589] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 5.466987] mmc1: CMD CRC or end bit error, int mask 0xc0000
[ 5.467382] mmc1: CMD CRC or end bit error, int mask 0xc0000

（2）是否使用一个永远开机的电源作为wifi模块的VIN
当“WL_REG_ON”变高时，启用VIN_LDO (1.3v)

（3）系统启动时是否启用GPIO12 (WL_REG_ON) ?
是的，系统启动时启用GPIO12 (WL_REG_ON)

我在dts中这样定义，以便在引导时启用GPIO12

gpio: gpio@6000d000 {
wlan-output-high {
gpio-hog;
output-high;
gpios = <TEGRA_GPIO(Y, 2) GPIO_ACTIVE_HIGH>;
label = “wlan-out-high”;
};
}

SDIO时钟只在启动时被看到
GPIO12(WL_REG_ON)-在SDIO时钟激活前启用
仍然没有枚举SDIO和WiFi客户端驱动程序探测没有发生

[ 1.595331] mmc1: new ultra high speed SDR104 SDIO card at address 0001
and WiFi client driver probe is happening

（4）dts只设置成1.8v

WiFi加载正常

我可以在Jetson Nano上打开wifi，但同样的驱动程序在Xavier NX上不能工作
错误如下：

[ 8.279684] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
[ 11.551637] brcmfmac: brcmf_cfg80211_reg_notifier: not a ISO3166 code (0x30 0x30)
[ 14.166818] brcmfmac: brcmf_proto_bcdc_query_dcmd: brcmf_proto_bcdc_msg failed w/status -110
[ 17.494892] brcmfmac: brcmf_proto_bcdc_query_dcmd: brcmf_proto_bcdc_msg failed w/status -110
[ 17.495084] brcmfmac: brcmf_cfg80211_get_channel: chanspec failed (-110)
[ 23.386799] brcmfmac: brcmf_proto_bcdc_query_dcmd: brcmf_proto_bcdc_msg failed w/status -110
[ 23.386994] brcmfmac: brcmf_cfg80211_get_tx_power: error (-110)
[ 26.454885] brcmfmac: brcmf_do_escan: error (-110)
[ 26.455009] brcmfmac: brcmf_cfg80211_scan: scan error (-110)
[ 27.443516] brcmfmac: brcmf_run_escan: error (-4)
[ 27.443643] brcmfmac: brcmf_cfg80211_scan: scan error (-4)
[ 80.215022] brcmfmac: _brcmf_set_multicast_list: Setting mcast_list failed, -110
[ 105.302828] brcmfmac: brcmf_proto_bcdc_query_dcmd: brcmf_proto_bcdc_msg failed w/status -110
[ 105.303017] brcmfmac: brcmf_cfg80211_get_channel: chanspec failed (-110)
[ 315.990889] brcmfmac: brcmf_do_escan: error (-110)
[ 315.991134] brcmfmac: brcmf_cfg80211_scan: scan error (-110)
[ 386.088003] brcmfmac: brcmf_run_escan: error (-4)
[ 386.088224] brcmfmac: brcmf_cfg80211_scan: scan error (-4)

Wlan0正常，但我不能连接任何wifi网络

$ ifconfig
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 48:eb:62:c0:f0:87 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

$ nmcli device wifi list
IN-USE SSID MODE CHAN RATE SIGNAL BARS SECURITY
arunkumar Infra 4 270 Mbit/s 37 ▂▄__ WPA2

（5）检查syslog

[ 368.989771] ieee80211 phy0: brcmf_escan_timeout: timer expired
[ 376.575141] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 386.909776] ieee80211 phy0: brcmf_escan_timeout: timer expired
[ 414.301765] ieee80211 phy0: brcmf_escan_timeout: timer expired
[ 444.720654] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 455.005784] ieee80211 phy0: brcmf_escan_timeout: timer expired
[ 473.437767] ieee80211 phy0: brcmf_escan_timeout: timer expired
[ 488.406253] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

5. 解决办法

修改sdhci为如下：

sdhci@3440000 {
#address-cells = <1>;
#size-cells = <0>;
non-removable;
force-non-removable-rescan;
no-sd;
max-clk-limit = <25000000>;
only-1-8-v;
status = “okay”;
brcmf: brcmf@0 {
reg = <0>;
compatible = “brcm,bcm4329-fmac”;
};
};

并使用最新的brcmfmac驱动程序
地址如下：

https://community.cypress.com/t5/Resource-Library/Cypress-Linux-WiFi-Driver-Release-FMAC-2020-09-25/ta-p/251089