移植平台：瑞芯微RV1109（kernel版本：4.19 SDK:RV1126_RV1109_LINUX_SDK_V1.8.0_20210224）海思3861L（SDK:Hi3861V100R001C00SPC025 + patch_Hi3861V100C001R001SPC025_for_hichannel_001）

项目前期没有PCB板，我们只能通过开发板调试外设功能，而RV1109开发板与wifi之间是采用SDIO通讯的，SDIO是高速通讯信号，一般的开发板不会将sdio引出。但是庆幸的是，sd卡也是通过sdio与主控进行通讯的，我们完全可以打一个金手指样式的PCB转接板，将SDIO与wifi模块连接起来，如下图所示：

hi_channel驱动是基于linux4.9内核编写的，要将该驱动应用至linux4.19内核，则需梳理两个内核版本间的改动对wifi驱动的影响，这对于对内核不熟的小伙伴来说可得花一番功夫了，但不管怎么样，海思已经提供了一版驱动作参考了。下面是在移植过程中总结的修改项，供大家参考：

一、移植遇到的问题（移植修改项）

1. net device结构体成员名称destructor 改为 priv_destructor

报错信息为：

hichannel//oal/oal_net.h:38:57: error: 'oal_net_device_stru' {aka 'struct net_device'} has no member named 'destructor'; did you mean 'priv_destructor'?
#define oal_netdevice_destructor(_pst_dev) ((_pst_dev)->destructor)
^~~~~~~~~~

修改方法：

2. 结构体wait_queue_t 需要改用为 wait_queue_entry_t

报错信息为：

hichannel//oal/oal_wait.h:26:9: error: unknown type name 'wait_queue_t'
typedef wait_queue_t oal_wait_queue_stru;
^~~~~~~~~~~~

修改方法：

3. timer用法更改

报错信息为：

/home/disk/fangye/hichannel/oal/oal_timer.h:37:5: error: implicit declaration of function 'init_timer'; did you mean 'init_timers'? [-Werror=implicit-function-declaration]
init_timer(pst_timer);
^~~~~~~~~~
init_timers
/home/disk/fangye/hichannel//oal/oal_timer.h:39:25: error: assignment to 'void (*)(struct timer_list *)' from incompatible pointer type 'oal_timer_func' {aka 'void (*)(long unsigned int)'} [-Werror=incompatible-pointer-types]
pst_timer->function = p_func;
^
/home/disk/fangye/hichannel//oal/oal_timer.h:40:14: error: 'oal_timer_list_stru' {aka 'struct timer_list'} has no member named 'data'
pst_timer->data = ui_arg;

这是因为在linux kernel 4.14版本后，init_timer被移除了，需要换用新的timer_setup接口代替。

参考链接：

https://lwn.net/Articles/735887/

https://stackoverflow.com/a/53842823

修改方法：

hcc_host.c

oal_timer.h

4. 内核调度参数配置

报错信息为：

hichannel//oal/oal_thread.h:59:30: error: storage size of 'st_sched_param' isn't known
struct sched_param st_sched_param;
^~~~~~~~~~~~~~

未知st_sched_param的存储大小，说明该变量类型只有声明没有定义，猜测应该是定义到别的头文件中去了。在sdk的kernel driver中搜索sched_setscheduler函数，对比头文件，添加相关的头文件即可。

修改方法：

5. 发送信号函数

hichannel//oal/oal_thread.h:110:5: error: implicit declaration of function 'send_sig'; did you mean 'send_sigio'? [-Werror=implicit-function-declaration]
send_sig(SIGTERM, pst_thread, 1);
^~~~~~~~
send_sigio
cc1: some warnings being treated as errors
scripts/Makefile.build:333: recipe for target '/home/disk/fangye/projects/rv1109_smart_door/kernel/drivers/hichannel/hcc/hcc_host.o' failed

同样，在kernel/include下搜索send_sig，包含相应的头文件即可。

修改方法:

6.系统时钟

报错信息为：

hichannel/sdio/sdio_host.c:821:38: error: implicit declaration of function 'cpu_clock'; did you mean 'pud_lock'? [-Werror=implicit-function-declaration]
hi_sdio->msg[bit].cpu_time = cpu_clock(UINT_MAX);
^~~~~~~~~
pud_lock
cc1: some warnings being treated as errors
scripts/Makefile.build:333: recipe for target '/home/disk/fangye/projects/rv1109_smart_door/kernel/drivers/hichannel/sdio/sdio_host.o' failed

修改方法:

添加头文件：

#include <linux/sched/clock.h>

按上述修改项修改后，hi_channel驱动编译通过了：

二、平台驱动适配

由于hi_channel目前只适配了hi3518和君正T31平台，仅仅编译通过还不能正常使用，需要针对不通的平台进行适配。hi3861L是通过sdio与主控通讯为host侧主控提供上网能力的，而hi3861L是一款低功耗wifi模块，为了满足低功耗需求，hi3861L是采用一线SDIO方式进行通讯的。

1. 要适配驱动，首先要适配rv1109的dts

我这里是将sdcard 我这里是基于rv1126-evb-ddr3-v13-tb-emmc.dts进行修改的：

dts配置如下：

Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Change-Id: I59016bc57d21e6459b95d39f2e876daa8a0e2157
---
arch/arm/boot/dts/rv1109-evb-ddr3-v13-tb-emmc.dts | 15 +++++++--------
arch/arm/boot/dts/rv1126-evb-v10.dtsi | 26 +++++++++++++-------------
arch/arm/boot/dts/rv1126-pinctrl.dtsi | 7 ++++++-
3 files changed, 26 insertions(+), 22 deletions(-)
mode change 100644 => 100755 arch/arm/boot/dts/rv1126-evb-v10.dtsi
mode change 100644 => 100755 arch/arm/boot/dts/rv1126-pinctrl.dtsi

diff --git a/arch/arm/boot/dts/rv1109-evb-ddr3-v13-tb-emmc.dts b/arch/arm/boot/dts/rv1109-evb-ddr3-v13-tb-emmc.dts
index 867b02a..c4da626 100755
--- a/arch/arm/boot/dts/rv1109-evb-ddr3-v13-tb-emmc.dts
+++ b/arch/arm/boot/dts/rv1109-evb-ddr3-v13-tb-emmc.dts
@@ -414,16 +414,15 @@
};

&sdmmc {
-   bus-width = <4>;
-   cap-mmc-highspeed;
-   cap-sd-highspeed;
-   card-detect-delay = <200>;
+   max-frequency = <50000000>;
+   bus-width = <1>;
+   cap-sdio-irq;
+   keep-power-in-suspend;
    rockchip,default-sample-phase = <90>;
-   supports-sd;
-   sd-uhs-sdr12;
+   supports-sdio;
    sd-uhs-sdr25;
-   sd-uhs-sdr104;
-   vqmmc-supply = <&vccio_sd>;
+   vqmmc-supply = <&vcc3v3_sd>;
+   pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_det &sdmmc0_bus1>;
    status = "okay";
};

diff --git a/arch/arm/boot/dts/rv1126-evb-v10.dtsi b/arch/arm/boot/dts/rv1126-evb-v10.dtsi
old mode 100644
new mode 100755
index 144e9ed..a124f9c
--- a/arch/arm/boot/dts/rv1126-evb-v10.dtsi
+++ b/arch/arm/boot/dts/rv1126-evb-v10.dtsi
@@ -1265,19 +1265,19 @@
    vref-supply = <&vcc_1v8>;
};

-&sdmmc {
-   bus-width = <4>;
-   cap-mmc-highspeed;
-   cap-sd-highspeed;
-   card-detect-delay = <200>;
-   rockchip,default-sample-phase = <90>;
-   supports-sd;
-   sd-uhs-sdr12;
-   sd-uhs-sdr25;
-   sd-uhs-sdr104;
-   vqmmc-supply = <&vccio_sd>;
-   status = "okay";
-};
+//&sdmmc {
+//   bus-width = <4>;
+//   cap-mmc-highspeed;
+//   cap-sd-highspeed;
+//   card-detect-delay = <200>;
+//   rockchip,default-sample-phase = <90>;
+//   supports-sd;
+//   sd-uhs-sdr12;
+//   sd-uhs-sdr25;
+//   sd-uhs-sdr104;
+//   vqmmc-supply = <&vccio_sd>;
+//   status = "okay";
+//};

&sdio {
    max-frequency = <200000000>;
diff --git a/arch/arm/boot/dts/rv1126-pinctrl.dtsi b/arch/arm/boot/dts/rv1126-pinctrl.dtsi
old mode 100644
new mode 100755
index dd83d8f..c555d7a
--- a/arch/arm/boot/dts/rv1126-pinctrl.dtsi
+++ b/arch/arm/boot/dts/rv1126-pinctrl.dtsi
@@ -1310,7 +1310,12 @@
    };
    sdmmc0 {
        /omit-if-no-ref/
-       sdmmc0_bus4: sdmmc0-bus4 {
+       sdmmc0_bus1: sdmmc0-bus1 {
+           rockchip,pins =
+               /* sdmmc0_d0 */
+               <1 RK_PA4 1 &pcfg_pull_up_drv_level_2>;
+       };
+        sdmmc0_bus4: sdmmc0-bus4 {
            rockchip,pins =
                /* sdmmc0_d0 */
                <1 RK_PA4 1 &pcfg_pull_up_drv_level_2>,
--
2.7.4