R818-Linux USB

1 修改兼容性和速度

lichee/brandy-2.0/u-boot-2018/common/usb_storage.c
blk = USHRT_MAX; （USHRT_MAX越小兼容性越好但速度会降低）

2 配置挂载目录

package/allwinner/mtp/src/main.c
static mtp_storage_t gStorageArray[] = {
    {NULL, 65537, "/mnt/UDISK", "Tina存储设备", 0, 0},
    //{NULL, 65537, "/mnt/exUDISK", "Tina存储设备", 0, 0},
    //{NULL, 65539, "/boot", "boot", 0, 0},
    //{NULL, 65540, "/boot-res", "boot-res", 0, 0},
    //exUDISK
};

3 配置内核：

// U盘
Enable the block layer --->
    Partition Types --->
        [*] PC BIOS (MSDOS partition tables) support
// USB摄像头
Device Drivers --->
    <*> Multimedia support --->
        [*] Media USB Adapters --->
         <*> USB Video Class (UVC)
         [*] UVC input events device support

4 设备树：

reg_usb0_vbus: usb0-vbus {
    compatible = "regulator-fixed";
    // 引脚修改
    gpio = <&pio PF 4 1 2 0 0>;  /* 修改对应管脚号 */
    regulator-name = "usb0-vbus";
    regulator-min-microvolt = <5000000>;
    regulator-max-microvolt = <5000000>;
    enable-active-high;
};

reg_usb1_vbus: usb1-vbus {
    compatible = "regulator-fixed";
    // 引脚修改
    gpio = <&pio PF 3 1 2 0 1>;  /* 修改对应管脚号 */
    regulator-name = "usb1-vbus";
    regulator-min-microvolt = <5000000>;
    regulator-max-microvolt = <5000000>;
    enable-active-high;
};

5 相关命令

编号	命令	说明
1	df -h	用df –h查看文件系统的磁盘空间占用情况
2	sudo mkfs.ntfs /dev/sda1 -f	mount报错NTFS signature is missing 解决这个问题
3	cat proc/partitions	查看设备信息
4	find -name "fstab"	搜索./etc/config/fstab
5	cat /proc/bus/input/devices	查看当前可输入设备
6	hexdump /dev/input/event1	验证设备输入
7	time dd if=/dev/zero of=/mnt/exUDISK/test.bin bs=1MB count=1024 time dd if=/mnt/exUDISK/test.bin of=/dev/null bs=1MB count=1024	测试USB读写性能（/mnt/exUDISK/ 这里是USB挂载目录）
8	echo 0 > sys/devices/platform/soc/5200000.ehci1‑controller/ehci_enable echo 0 > sys/devices/platform/soc/5200000.ohci1‑controller/ohci_enable	0：卸载主机驱动<br />1：加载主机驱动

// USB hub驱动位置
lichee/linux-4.9/drivers/usb/core/hub.c

(1)USB其他问题 - 修改挂载信息

target/allwinner/r818-evb1/base-files/etc/config/fstab

config 'mount'
option target '/mnt/exUDISK2'
option device '/dev/sdb1'
option options 'rw,async,noatime'
option enabled '1'

config 'mount'
option target '/mnt/exUDISK2'
option device '/dev/sdb'
option options 'rw,async,noatime'
option enabled '1'

(2)修改系统默认生成文件夹位置 需要同名添加

package/base-files/Makefile

mkdir -p $(1)/mnt/exUDISK2
//修改系统默认生成文件夹位置 需要同名添加
package/busybox-init-base-files/Makefile

mkdir -p $(1)/mnt/exUDISK2

// 解决两个NTFS 文件系统格式的只能挂载一个的问题
package/system/fstools/files/mount.hotplug

sdb*)
mkdir -p /mnt/exUDISK2
/usr/bin/ntfs-3g /dev/${DEVNAME} /mnt/exUDISK2 -o rw,noatime,nodiratime,nosuid,nodev
exit
;;

6 关闭 Debug 功能，否则会打印很多调试信息，影响正常使用；

#lichee/linux-4.9/drivers/net/wireless/rtl8821cs/Makefile
########################## Debug ###########################
CONFIG_RTW_DEBUG = n
# default log level is _DRV_INFO_ = 4,
# please refer to "How_to_set_driver_debug_log_level.doc" to set the available level.
CONFIG_RTW_LOG_LEVEL = 4