RK3562 移植 rtl8723ds WIFI 驱动

平台: RK3562，android13。

背景：最近需要移植 rtl8723ds wifi驱动。这款驱动之前RK有做过适配。但是在android13版本下，SDK里面的驱动旧了。于是找wifi厂商要了新驱动。

重新移植。记录下遇到的一些编译问题。

按照RK的SDK文档，先修改下rtl8723ds 驱动。如下：

第一步：修改rtl8723ds的makefile:

1. Realtek 发布的 wifi 驱动默认是平台是 PC 需要修改成 ROCKCHIP

CONFIG_PLATFORM_I386_PC = y 修改为 CONFIG_PLATFORM_I386_PC = n

CONFIG_PLATFORM_ARM_RK3188 = n 修改为 CONFIG_PLATFORM_ARM_RK3188 = y

2. Rockchip 平台 wifi 驱动是以 ko 形式存在，因此需要将驱动 module 名修改为 8723ds

ifeq ($(CONFIG_PLATFORM_ARM_RK3188), y)

EXTRA_CFLAGS+=

-DCONFIG_LITTLE_ENDIAN

-DCONFIG_PLATFORM_ANDROID

-DCONFIG_PLATFORM_ROCKCHIPS

……

#EXTRA_CFLAGS += -DRTW_ENABLE_WIFI_CONTROL_FUNC //注意这个要注释掉 Need

to comment this out

……

MODULE_NAME := 8723ds

Endif

第二步：修改驱动入口函数

因为rtl8723ds 是sdio接口的。找到入口函数： os_dep/linux/sdio_intf.c  在文件末尾换成RK注册接口。

#include "rtw_version.h"
#include <linux/rfkill-wlan.h>
extern int get_wifi_chip_type(void);
extern int rockchip_wifi_power(int on);
extern int rockchip_wifi_set_carddetect(int val);

int rockchip_wifi_init_module_rtkwifi(void)
{
//#ifdef CONFIG_WIFI_LOAD_DRIVER_WHEN_KERNEL_BOOTUP
//    int type = get_wifi_chip_type();
//    if (type < WIFI_AP6XXX_SERIES || type == WIFI_ESP8089) return 0;
//#endif
    printk("\n");
    printk("=======================================================\n");
    printk("==== Launching Wi-Fi driver! (Powered by Rockchip) ====\n");
    printk("=======================================================\n");
    printk("Realtek 8723DS SDIO WiFi driver (Powered by Rockchip,Ver %s) init.\n", DRIVERVERSION);

    rockchip_wifi_power(1);
    rockchip_wifi_set_carddetect(1);    

    return rtw_drv_entry();
}

void rockchip_wifi_exit_module_rtkwifi(void)
{
//#ifdef CONFIG_WIFI_LOAD_DRIVER_WHEN_KERNEL_BOOTUP
//    int type = get_wifi_chip_type();
//    if (type < WIFI_AP6XXX_SERIES || type == WIFI_ESP8089) return;
//#endif
    printk("\n");
    printk("=======================================================\n");
    printk("==== Dislaunching Wi-Fi driver! (Powered by Rockchip) ====\n");
    printk("=======================================================\n");
    printk("Realtek 8723DS SDIO WiFi driver (Powered by Rockchip,Ver %s) init.\n", DRIVERVERSION);

    rtw_drv_halt();

    rockchip_wifi_set_carddetect(0);
    rockchip_wifi_power(0);
}

#ifdef CONFIG_WIFI_BUILD_MODULE
module_init(rockchip_wifi_init_module_rtkwifi);
module_exit(rockchip_wifi_exit_module_rtkwifi);
#else
#ifdef CONFIG_WIFI_LOAD_DRIVER_WHEN_KERNEL_BOOTUP
late_initcall(rockchip_wifi_init_module_rtkwifi);
module_exit(rockchip_wifi_exit_module_rtkwifi);
#else
EXPORT_SYMBOL(rockchip_wifi_init_module_rtkwifi);
EXPORT_SYMBOL(rockchip_wifi_exit_module_rtkwifi);
#endif
#endif
//module_init(rtw_drv_entry);
//module_exit(rtw_drv_halt);

 

编译遇到的问题记录如下：

error: switch condition has boolean value [-Werror,-Wswitch-bool]
        switch (TXPWR_LMT_ALTERNATE_DEFINED(txpwr_lmt)) {
        ^       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  CC [M]  /home/data/rb-a3562/external/wifi_driver/aic8800/aic8800_fdrv/aicwf_compat_8800dc.o
  CC [M]  /home/data/rb-a3562/external/wifi_driver/rtl8723cs/core/rtw_mlme.o
1 error generated. 

 这是编译器的布尔条件警告错误，在Makefil里面添加如下规则，编译通过。

EXTRA_CFLAGS += -Wno-switch-bool
EXTRA_CFLAGS += -Wno-error=switch-bool
EXTRA_CFLAGS += -Wno-switch
EXTRA_CFLAGS += -Wno-error=switch

 具体解释如下：

- -Wno-switch-bool : 禁用switch语句使用布尔值的警告
- -Wno-error=switch-bool : 防止switch-bool警告被视为错误
- -Wno-switch : 禁用一般的switch语句相关警告
- -Wno-error=switch : 防止switch相关警告被视为错误

 

遇到的第二个编译错误如下

ERROR: modpost: module 8723ds uses symbol kernel_write from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
ERROR: modpost: module 8723ds uses symbol kernel_read from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
ERROR: modpost: module 8723ds uses symbol filp_open from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
ERROR: modpost: module 8723ds uses symbol kern_path from namespace VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver, but does not import it.
scripts/Makefile.modpost:152: recipe for target '/home/data/rb-a3562/external/wifi_driver/Module.symvers' failed
make[1]: *** [/home/data/rb-a3562/external/wifi_driver/Module.symvers] Error 1
make[1]: *** Deleting file '/home/data/rb-a3562/external/wifi_driver/Module.symvers'
Makefile:1821: recipe for target 'modules' failed
make: *** [modules] Error 2
make: Leaving directory '/home/data/rb-a3562/kernel-5.10' 

 

这是 VFS 符号依赖，解决方法如下：

在rtl8723ds\os_dep\linux\os_intfs.c目录下添加

MODULE_IMPORT_NS(VFS_internal_I_am_really_a_filesystem_and_am_NOT_a_driver); 

 

最后重新编译测试，WIFI能正常使用。