怎样从RK3568移植RTL8821CS驱动呢

WIFI移植

因为RK3568支持RTL8821CS模组，因此从RK3568移植RTL8821CS驱动

• 移植RTL8821驱动：
  1.1 drivers/net/wireless/rockchip_wlan/Kconfig
  
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff drivers/net/wireless/rockchip_wlan/Kconfig
  diff --git a/drivers/net/wireless /rockchip_wlan/Kconfig b/drivers/net/wireless/rockchip_wlan/Kconfig
  index 6bfc72b9fde0..d56f339eb085 100644
  --- a/drivers/net/wireless/rockchip_wlan/Kconfig
  +++ b/drivers/net/wireless/rockchip_wlan/Kconfig
  @ @ -44,6 +44,7 @@ source "drivers/net/wireless/rockchip_wlan/rtl8723bu/Kconfig"
  source "drivers/net/wireless/rockchip_wlan/rtl8723cs/Kconfig"
  source "drivers/net/wireless/rockchip_wlan/rtl8723ds /Kconfig"
  源 "drivers/net/wireless/rockchip_wlan/rtl8822be/Kconfig"
  +source "drivers/net/wireless/rockchip_wlan/rtl8821cs/Kconfig"
  1.2 驱动程序/net/wireless/rockchip_wlan/Makefile
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff drivers/net/wireless/rockchip_wlan/Makefile
  diff --git a/drivers/net/wireless/rockchip_wlan/Makefile b/drivers/net/wireless/rockchip_wlan/Makefile
  index fb0e47b2ecfd..d693f2ad0f5d 100644
  --- a/drivers/net/wireless/rockchip_wlan/Makefile
  +++ b /drivers/net/wireless/rockchip_wlan/Makefile
  @@ -9,6 +9,7 @@ obj-$(CONFIG_RTL8723BU) += rtl8723bu/
  obj-$(CONFIG_RTL8723CS) += rtl8723cs/
  obj-$(CONFIG_RTL8723DS) += rtl8723ds/
  obj-$(CONFIG_RTL8822BE) += rtl8822be/
  +obj-$(CONFIG_RTL8821CS) += rtl8821cs/
  1.3 arch/arm64/boot/dts/rockchip/rk3399-grst-a2.dtsi
  差异 --git a/arch/arm64/boot/dts/rockchip/rk3399-grst-a2.dtsi b/arch/arm64/boot/dts /rockchip/rk3399-grst-a2.dtsi
  索引 6fb7749af469..48228f2709ea 100644
  --- a/arch/arm64/boot/dts/rockchip/rk3399-grst-a2.dtsi
  +++ b/arch/arm64/boot/dts /rockchip/rk3399-grst-a2.dtsi
  @@ -122,7 +122,7 @@
          wireless-wlan {
                  compatible = "wlan-platdata";
                  Rockchip,grf = <&grf>;
  - wifi_chip_type = "rtl8723ds";
  + wifi_chip_type = "rtl8821cs";
                  sdio_vref = <1800>；
                  WIFI,host_wake_irq = <&gpio0 3 GPIO_ACTIVE_HIGH>;
  
  1.4 arch/arm64/configs/rockchip_linux_defconfig
  diff --git a/arch/arm64/configs/rockchip_linux_defconfig b/arch/arm64/configs/rockchip_linux_defconfig
  index 5587013ba113..093d9523a0e6 100644
  --- a/arch/arm64/configs/rockchip_linux_defconfig
  ++ + b/arch/arm64/configs/rockchip_linux_defconfig
  @@ -576,4 +576,4 @@ CONFIG_CAN_DEV=y
  CONFIG_CAN_RAW=y
  CONFIG_CAN_BCM=y
  CONFIG_CAN_GW=y
  -CONFIG_RTL8723DS=m
  +CONFIG_RTL8821CS=m
  1.5 驱动拷贝到路径
  drivers/net/wireless/rockchip_wlan/rtl8821cs/
  
• 内核修改
  2.1 增加RTL8821CS wifi类型，用于dts中的类型判断
  2.1.1 include/linux/rfkill-wlan.h
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff include/linux/rfkill-wlan.h
  diff --git a/include/linux/rfkill-wlan.h b/include/linux/rfkill-wlan.h
  index 883d0ae1a8bf..8165476cddb8 100644
  --- a/include/linux/rfkill-wlan.h
  +++ b/include/linux/rfkill-wlan.h
  @@ -74,6 +74,7 @@ enum {
       WIFI_RTL8189ES,
       WIFI_RTL8189FS,
       WIFI_RTL8812AU,
  +    WIFI_RTL8821CS,
       WIFI_RTL_SERIES,
  2.1.2 net/rfkill/rfkill-wlan.c
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff net/rfkill/rfkill-wlan.c
  diff --git a/net/rfkill/rfkill-wlan.c b/net/rfkill/rfkill-wlan.c
  index 333368f2f071..e424fd4b27a6 100644
  --- a/net/rfkill/rfkill-wlan.c
  +++ b/net/rfkill/rfkill-wlan.c
  @@ -156,6 +156,8 @@ int get_wifi_chip_type(void)
           type = WIFI_RTL8189FS;
       } else if (strcmp(wifi_chip_type_string, "rtl8812au") == 0) {
           type = WIFI_RTL8812AU;                        
  +    } else if (strcmp(wifi_chip_type_string, "rtl8821cs") == 0) {
  +        type = WIFI_RTL8821CS;                        
       } else if (strcmp(wifi_chip_type_string, "esp8089") == 0) {
           type = WIFI_ESP8089;
       } else if (strcmp(wifi_chip_type_string, "mvl88w8977") == 0) {
  2.2 内核版本不一致做的修改
  2.2.1 include/net/cfg80211.h
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff include/net/cfg80211.h
  diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
  index c05748cc1b20..768a35728ce5 100644
  --- a/include/net/cfg80211.h
  +++ b/include/net/cfg80211.h
  @@ -2220,6 +2220,34 @@ struct cfg80211_qos_map {
          struct cfg80211_dscp_exception dscp_exception[IEEE80211_QOS_MAP_MAX_EX];
          struct cfg80211_dscp_range up[8];
  };
  +/**
  + * struct cfg80211_external_auth_params - Trigger External authentication.
  + *
  + * Commonly used across the external auth request and event interfaces.
  + *
  + * @action: action type / trigger for external authentication. Only significant
  + *      for the authentication request event interface (driver to user space).
  + * @bssid: BSSID of the peer with which the authentication has
  + *      to happen. Used by both the authentication request event and
  + *      authentication response command interface.
  + * @ssid: SSID of the AP.  Used by both the authentication request event and
  + *      authentication response command interface.
  + * @key_mgmt_suite: AKM suite of the respective authentication. Used by the
  + *      authentication request event interface.
  + * @status: status code, %WLAN_STATUS_SUCCESS for successful authentication,
  + *      use %WLAN_STATUS_UNSPECIFIED_FAILURE if user space cannot give you
  + *      the real status code for failures. Used only for the authentication
  + *      response command interface (user space to driver).
  + * @pmkid: The identifier to refer a PMKSA.
  + */
  +struct cfg80211_external_auth_params {
  +        enum nl80211_external_auth_action action;
  +        u8 bssid[ETH_ALEN] __aligned(2);
  +        struct cfg80211_ssid ssid;
  +        unsigned int key_mgmt_suite;
  +        u16 status;
  +        const u8 *pmkid;
  +};
  
  /**
    * struct cfg80211_ops - backend description for wireless configuration
  @@ -2756,6 +2784,8 @@ struct cfg80211_ops {
          void    (*tdls_cancel_channel_switch)(struct wiphy *wiphy,
                                                struct net_device *dev,
                                                const u8 *addr);
  +        int     (*external_auth)(struct wiphy *wiphy, struct net_device *dev,
  +                                 struct cfg80211_external_auth_params *params);
  };
  
  /*
  @@ -3516,6 +3546,8 @@ struct wireless_dev {
          u8 ssid_len, mesh_id_len, mesh_id_up_len;
          struct cfg80211_conn *conn;
          struct cfg80211_cached_keys *connect_keys;
  +       u32 conn_owner_nlportid;
  +
  
          struct list_head event_list;
          spinlock_t event_lock;
  @@ -5340,6 +5372,17 @@ wiphy_ext_feature_isset(struct wiphy *wiphy,
  /* ethtool helper */
  void cfg80211_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info);
  
  +/**
  + * cfg80211_external_auth_request - userspace request for authentication
  + * @netdev: network device
  + * @params: External authentication parameters
  + * @gfp: allocation flags
  + * Returns: 0 on success, < 0 on error
  + */
  +int cfg80211_external_auth_request(struct net_device *netdev,
  +                                   struct cfg80211_external_auth_params *params,
  +                                   gfp_t gfp);
  +
  /* Logging, debugging and troubleshooting/diagnostic helpers. */
  
  /* wiphy_printk helpers, similar to dev_printk */
  2.2.2 include/uapi/linux/nl80211.h
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff include/uapi/linux/nl80211.h
  diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
  index d3aea4f10faf..86466a0f191f 100644
  --- a/include/uapi/linux/nl80211.h
  +++ b/include/uapi/linux/nl80211.h
  @@ -1006,6 +1006,41 @@ enum nl80211_commands {
  
          NL80211_CMD_WIPHY_REG_CHANGE,
  
  +       NL80211_CMD_START_NAN,
  +        NL80211_CMD_STOP_NAN,
  +        NL80211_CMD_ADD_NAN_FUNCTION,
  +        NL80211_CMD_DEL_NAN_FUNCTION,
  +        NL80211_CMD_CHANGE_NAN_CONFIG,
  +        NL80211_CMD_NAN_MATCH,
  +
  +        NL80211_CMD_SET_MULTICAST_TO_UNICAST,
  +
  +        NL80211_CMD_UPDATE_CONNECT_PARAMS,
  +
  +        NL80211_CMD_SET_PMK,
  +        NL80211_CMD_DEL_PMK,
  +
  +        NL80211_CMD_PORT_AUTHORIZED,
  +
  +        NL80211_CMD_RELOAD_REGDB,
  +
  +        NL80211_CMD_EXTERNAL_AUTH,
  +
  +        NL80211_CMD_STA_OPMODE_CHANGED,
  +
  +        NL80211_CMD_CONTROL_PORT_FRAME,
  +
  +        NL80211_CMD_GET_FTM_RESPONDER_STATS,
  +
  +        NL80211_CMD_PEER_MEASUREMENT_START,
  +        NL80211_CMD_PEER_MEASUREMENT_RESULT,
  +
  +       NL80211_CMD_PEER_MEASUREMENT_COMPLETE,
  +
  +        NL80211_CMD_NOTIFY_RADAR,
  +
  +        NL80211_CMD_UPDATE_OWE_INFO,
  +
          /* add new commands above here */
  
          /* used to define NL80211_CMD_MAX below */
  @@ -2157,6 +2192,100 @@ enum nl80211_attrs {
          NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
          NL80211_ATTR_SCHED_SCAN_PLANS,
  
  +       NL80211_ATTR_PBSS,
  +
  +        NL80211_ATTR_BSS_SELECT,
  +
  +        NL80211_ATTR_STA_SUPPORT_P2P_PS,
  +
  +        NL80211_ATTR_PAD,
  +
  +        NL80211_ATTR_IFTYPE_EXT_CAPA,
  +
  +        NL80211_ATTR_MU_MIMO_GROUP_DATA,
  +        NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR,
  +
  +        NL80211_ATTR_SCAN_START_TIME_TSF,
  +        NL80211_ATTR_SCAN_START_TIME_TSF_BSSID,
  +        NL80211_ATTR_MEASUREMENT_DURATION,
  +        NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY,
  +
  +        NL80211_ATTR_MESH_PEER_AID,
  +
  +        NL80211_ATTR_NAN_MASTER_PREF,
  +        NL80211_ATTR_BANDS,
  +        NL80211_ATTR_NAN_FUNC,
  +        NL80211_ATTR_NAN_MATCH,
  +
  +        NL80211_ATTR_FILS_KEK,
  +        NL80211_ATTR_FILS_NONCES,
  +
  +     
  

•    NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED，
  + NL80211_ATTR_BSSID，
  +
  + NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI，
  + NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST，
  +
  + NL80211_ATTR_TIMEOUT_REASON，
  +
  + NL80211_ATTR_FILS_ERP_USERNAME，
  + NL80211_ATTR_FILS_ERP_REALM，
  + NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM，
  + NL80211_ATTR_FILS_ERP_RRK，
  + NL80211_ATTR_FILS_CACHE_ID，
  +
  + NL80211_ATTR_PMK，
  +
  + NL80211_ATTR_SCHED_SCAN_MULTI，
  + NL80211_ATTR_SCHED_SCAN_MAX_REQS，
  +
  + NL80211_ATTR_WANT_1X_4WAY_HS，
  + NL80211_ATTR_PMKR0_NAME，
  + NL80211_ATTR_PORT_AUTHORIZED，
  +
  + NL80211_ATTR_EXTERNAL_AUTH_ACTION，
  + NL80211_ATTR_EXTERNAL_AUTH_SUPPORT，
  +
  + NL80211_ATTR_NSS，
  + NL80211_ATTR_ACK_SIGNAL，
  +
  + NL80211_ATTR_CONTROL_PORT_OVER_NL80211，
  +
  + NL80211_ATTR_TXQ_STATS，
  + NL80211_ATTR_TXQ_LIMIT，
  + NL80211_ATTR_TXQ_MEMORY_LIMIT，
  + NL80211_ATTR_TXQ_QUANTUM，
  +
  + NL80211_ATTR_HE_CAPABILITY，
  +
  + NL80211_ATTR_FTM_RESPONDER，
  +
  + NL80211_ATTR_FTM_RESPONDER_STATS，
  +
  + NL80211_ATTR_TIMEOUT，
  +
  + NL80211_ATTR_PEER_MEASUREMENTS，
  +
  + NL80211_ATTR_AIRTIME_WEIGHT，
  + NL80211_ATTR_STA_TX_POWER_SETTING，
  + NL80211_ATTR_STA_TX_POWER，
  +
  + NL80211_ATTR_SAE_PASSWORD，
  +
  + NL80211_ATTR_TWT_RESPONDER，
  +
  + NL80211_ATTR_HE_OBSS_PD，
  +
  + NL80211_ATTR_WIPHY_EDMG_CHANNELS，
  + NL80211_ATTR_WIPHY_EDMG_BW_CONFIG，
  +
  + NL80211_ATTR_VLAN_ID，
  +
  + NL80211_ATTR_HE_BSS_COLOR，
  +
  + NL80211_ATTR_IFTYPE_AKM_SUITES，
  +
  +
          / *添加属性在这里，更新 nl80211.c 中的策略 */
  
          __NL80211_ATTR_AFTER_LAST,
  @@ -4645,5 +4774,14 @@ enum nl80211_sched_scan_plan {
          NL80211_SCHED_SCAN_PLAN_MAX =
                  __NL80211_SCHED_SCAN_PLAN_AFTER_LAST - 1
  };
  -
  +/**
  + * nl80211_external_auth_action - 使用外部
  + * 身份验证请求执行的操作。由 NL80211_ATTR_EXTERNAL_AUTH_ACTION 使用。
  + * @NL80211_EXTERNAL_AUTH_START：开始认证。
  + * @NL80211_EXTERNAL_AUTH_ABORT：中止正在进行的身份验证。
  + */
  +枚举 nl80211_external_auth_action {
  + NL80211_EXTERNAL_AUTH_START,
  + NL80211_EXTERNAL_AUTH_ABORT,
  +};
  #endif /* __LINUX_NL80211_H */
  2.2.3 net/wireless/nl80211.c
  git@grsthu-virtual-machine:~/rk3399_linux/kernel$ git diff net/wireless/nl80211.c
  diff --git a/net/wireless/nl80211.cb/net/wireless /nl80211.c
  索引 66da11734b48..1af42067c837 100644
  --- a/net/wireless/nl80211.c
  +++ b/net/wireless/nl80211.c
  @@ -13347,6 +13347,46 @@ void nl80211_send_ap_stopped(struct wireless_dev *wdev)
    输出：
          nlmsg_free(msg);
  }
  +int cfg80211_external_auth_request(struct net_device *dev,
  + struct cfg80211_external_auth_params *params,
  + gfp_t gfp)
  +{
  + struct wireless_dev *wdev = dev->ieee80211_ptr;
  + 结构 cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
  + 结构 sk_buff *msg;
  + 无效 *hdr;
  +
  + if (!wdev->conn_owner_nlportid)
  + return -EINVAL;
  +
  + 味精 = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
  + if (!msg)
  + return -ENOMEM;
  +
  + hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_EXTERNAL_AUTH);
  + if (!hdr)
  + goto nla_put_failure;
  +
  + if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
  + nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
  + nla_put_u32（味精，NL80211_ATTR_AKM_SUITES，参数->key_mgmt_suite）||
  + nla_put_u32（味精，NL80211_ATTR_EXTERNAL_AUTH_ACTION，
  +参数->动作）||
  + nla_put(msg, NL80211_ATTR_BSSID, ETH_ALEN, params->bssid) ||
  + nla_put(msg, NL80211_ATTR_SSID, params->ssid.ssid_len,
  + params->ssid.ssid))
  + goto nla_put_failure;
  +
  + genlmsg_end（味精，hdr）；
  + genlmsg_unicast（wiphy_net（&rdev->wiphy），味精，
  + wdev->conn_owner_nlportid）；
  + 0；
  +
  + nla_put_failure:
  + nlmsg_free(msg);
  +返回-ENOBUFS；
  +}
  +EXPORT_SYMBOL(cfg80211_external_auth_request);
  
  /* 初始化/退出函数 */
  
• ubuntu修改
  
  

复制编译生成的8821cs.ko修改到ubuntu的/lib/modules/目录
/etc/rc.local
添加insmod /lib/modules/8821cs.ko

蓝牙

• 内核文档修改
  1.1修改文件，根据RK的修改
  
  CONFIG_BT_HCIUART=n
  1.2编译realtek的蓝牙驱动(编译buildroot的时候会生成hci_uart.ko)
  external/rkwifibt/realtek/rtk_hciattach/
  
• ubuntu 修改，修改后可使用系统的控制蓝牙操作
  
  

修改文件系统中的/usr/bin/bt-attach




#!/usr/bin/env bash
  
#bt_type=$(rk_wifi_gettype)
#bt_type=cat /sys/class/rkwifi/chip|grep RTL8821CS
bt_type="RTL8821CS"
rtk_attach() {
        echo "start realtek bt"
        ret=`ps -ef |grep rtk_hciattach |grep -v "grep" |wc -l`
        if [ ${ret} = 1 ]; then
            killall rtk_hciattach
            sleep 1
        fi
        insmod /lib/modules/hci_uart.ko
        /usr/bin/rtk_hciattach -n -s 115200 /dev/ttyS0 rtk_h5 &
}

if [[ ${bt_type} = "RTL8821CS" ]]; then
        rtk_attach
        exit 0
fi

if [[ x$bt_type != x ]]; then
        bt_firmware=$(grep ${bt_type} /usr/bin/bt_firmware.cfg | awk '{print $2}')
        if [[ x$bt_firmware != x ]]; then
                start-stop-daemon --start --oknodo --pidfile /var/run/hciattach.pid --background --startas \
/usr/bin/brcm_patchram_plus1 -- --bd_addr_rand --enable_hci --no2bytes --use_baudrate_for_download \
--tosleep  200000 --baudrate 1500000 --patchram ${bt_firmware} /dev/ttyS0
        fi
fi

exit 0
3.移植蓝牙的firmware文件到ubuntu的/lib/firmware/rtlbt/


external/rkwifibt/realtek/RTL8821CS/rtl8821c_fw
external/rkwifibt/realtek/RTL8821CS/rtl8821c_config