Mount ptp separately from mtp

Ptp is now mounted in its own directory so the
mtp endpoint does not need to be closed to write
the ptp descriptors.

Bug: 72877174
Test: switch config to mtp/ptp
Change-Id: I9cec66eeb882fbf23851cdaf2e3906e8b3150b0a

init.hardware.usb.rc

@@ -30,6 +30,7 @@ on early-boot
     mkdir /config/usb_gadget/g1/functions/midi.gs5
     mkdir /config/usb_gadget/g1/functions/ffs.adb
     mkdir /config/usb_gadget/g1/functions/ffs.mtp
+    mkdir /config/usb_gadget/g1/functions/ffs.ptp
     mkdir /config/usb_gadget/g1/functions/diag.diag
     mkdir /config/usb_gadget/g1/functions/cser.dun.0
     mkdir /config/usb_gadget/g1/functions/cser.nmea.1
@@ -44,9 +45,9 @@ on early-boot
     mkdir /dev/usb-ffs/adb 0770 shell shell
     mount functionfs adb /dev/usb-ffs/adb rmode=0770,fmode=0660,uid=2000,gid=2000
     mkdir /dev/usb-ffs/mtp 0770 mtp mtp
+    mkdir /dev/usb-ffs/ptp 0770 mtp mtp
     mount functionfs mtp /dev/usb-ffs/mtp rmode=0770,fmode=0660,uid=1024,gid=1024,no_disconnect=1
-    setprop sys.usb.ffs.max_write 524288
-    setprop sys.usb.ffs.max_read 524288
+    mount functionfs ptp /dev/usb-ffs/ptp rmode=0770,fmode=0660,uid=1024,gid=1024,no_disconnect=1
     setprop sys.usb.mtp.device_type 3
     setprop sys.usb.controller "a800000.dwc3"
     write /sys/module/libcomposite/parameters/disable_l1_for_hs "y"

usb/UsbGadget.cpp

@@ -335,8 +335,7 @@ V1_0::Status UsbGadget::setupFunctions(
   int i = 0;
   std::string bootMode = GetProperty(PERSISTENT_BOOT_MODE, "");
 
-  if (((functions & GadgetFunction::PTP) != 0) ||
-      ((functions & GadgetFunction::MTP) != 0)) {
+  if (((functions & GadgetFunction::MTP) != 0)) {
     ffsEnabled = true;
     ALOGI("setCurrentUsbFunctions mtp");
     if (!WriteStringToFile("1", DESC_USE_PATH)) return Status::ERROR;
@@ -351,6 +350,21 @@ V1_0::Status UsbGadget::setupFunctions(
     mEndpointList.push_back("/dev/usb-ffs/mtp/ep1");
     mEndpointList.push_back("/dev/usb-ffs/mtp/ep2");
     mEndpointList.push_back("/dev/usb-ffs/mtp/ep3");
+  } else if (((functions & GadgetFunction::PTP) != 0)) {
+    ffsEnabled = true;
+    ALOGI("setCurrentUsbFunctions ptp");
+    if (!WriteStringToFile("1", DESC_USE_PATH)) return Status::ERROR;
+
+    if (inotify_add_watch(inotifyFd, "/dev/usb-ffs/ptp/", IN_ALL_EVENTS) == -1)
+      return Status::ERROR;
+
+
+    if (linkFunction("ffs.ptp", i++)) return Status::ERROR;
+
+    // Add endpoints to be monitored.
+    mEndpointList.push_back("/dev/usb-ffs/ptp/ep1");
+    mEndpointList.push_back("/dev/usb-ffs/ptp/ep2");
+    mEndpointList.push_back("/dev/usb-ffs/ptp/ep3");
   }
 
   if ((functions & GadgetFunction::MIDI) != 0) {