Android 如何實現usb驅動自動安裝?

 

 

如何實現usb驅動自動安裝？ 具體的需求可能是：連上usb後，默認選項為內置光盤(cdrom)模式，自動運行內置於光盤中的驅動程序，安裝完成後，再切回到usb mass stoage(ums)模式 [KEYWORD] usb默認連接，Built-in cd-rom，BICR，CD-ROM，cdrom，內置光盤，自動安裝驅動，自動運行，內置驅動程序 [SOLUTION] 以下提供一個實現的思路： 1，將您的驅動程序做成一個iso文件，制作工具可在網上找。 2，修改USB連接後的默認功能為bicr。如何將usb默認連接方式設置為bicr，請參考FAQ04464 3，將iso文件添加進BICR，具體請參考FAQ05690 How to add ISO files into BICR 4，需要修改您的驅動程序。發對應的cmd REZERO_UNIT，根據cmnd[1] 參數不同，來決定是切換到UMS還是BICR。
1). 我們的code中cmnd[1] 參數默認為0xD和0xB，您可以定制自己的cmd。 2).我們的code中的實現是切換到UMS，您可以定制切換到其他usb模式，如MTP。 可以通過修改usbdevicemanager.java實現 public void updateState(String state) {

...... } else if (REZEROCMD.equals(state)) {
/*When recieve REZEROCMD, it means that PC has installed a proper driver, so can switch to other USB function(UMS)*/
Slog.w(TAG, PC knows me);
mIsPcKnowMe = true;
setCurrentFunctions(UsbManager.USB_FUNCTION_MASS_STORAGE, false); //修改此處的USB_FUNCTION_MASS_STORAGE為USB_FUNCTION_MTP
return; ......

附上手機側相關code： 此功能相關的code在以下文件，可以參考了解手機側具體實現：
1. f_mass_storage.c

static int do_scsi_command(struct fsg_common *common)
{

case REZERO_UNIT:
printk(Get REZERO_UNIT command = %x , common->cmnd[1]);
if (common->cmnd[1] == 0xB)
common->android_callback(1);
else if (common->cmnd[1] == 0xD)
common->android_callback(2); ......

}

2. android.c

static void android_work(struct work_struct *data)
{

...... char *rezero_event[2] = { USB_STATE=REZEROCMD, NULL };
char *showcdrom_event[2] = { USB_STATE=SHOWCDROMCMD, NULL };
...... if (dev->rezero_cmd == 1) {
uevent_envp_cdrom = rezero_event;
dev->rezero_cmd = 0;
} else if (dev->rezero_cmd == 2) {
uevent_envp_cdrom = showcdrom_event;
dev->rezero_cmd = 0;
}
...... if (uevent_envp_cdrom) {
kobject_uevent_env(&dev->dev->kobj, KOBJ_CHANGE, uevent_envp_cdrom);
xlog_printk(ANDROID_LOG_INFO, USB_LOG, %s: sent uevent %s , __func__, uevent_envp_cdrom[0]);
} else {
xlog_printk(ANDROID_LOG_INFO, USB_LOG, %s: did not send zero uevent , __func__);
}

}

void mass_storage_callback(unsigned char cmd_type)
{

struct android_dev *dev = _android_dev;
if (cmd_type != 0)
dev->rezero_cmd = cmd_type;
schedule_work(&dev->work);
}

3. usbdevicemanager.java

public void updateState(String state) {

...... int connected, configured; if (DEBUG) SXlog.d(TAG, updateState - + state);
Message msg; ... } else if (REZEROCMD.equals(state)) {
/*When recieve REZEROCMD, it means that PC has installed a proper driver, so can switch to other USB function(UMS)*/
Slog.w(TAG, PC knows me);
mIsPcKnowMe = true;
setCurrentFunctions(UsbManager.USB_FUNCTION_MASS_STORAGE, false);
return;
} else if (SHOWCDROMCMD.equals(state)) {
/*When recieve REZEROCMD, it means that PC has installed a proper driver, so can switch to other USB function(UMS)*/
Slog.w(TAG, SHOW CD-ROM CMD);
setCurrentFunctions(UsbManager.USB_FUNCTION_BICR, false);
return; ...... }