USB/HSIC driver for WP76xx

Could you please provide internal USB/HSIC driver for WP76xx module. (This is not Host-module USB driver)
I heard that HSIC and USB peripheral driver is open source but we did not find it. My environment is below.

Legato Ver: 19.02.0_4cb954265427b8c2c668a010ff5be274
Yocto Ver: SWI9X07Y_02.28.03.05 2019-07-08_12:55:31
OS Ver: Linux version 3.18.131 (oe-user@oe-host) (gcc version 7.3.0 (GCC) ) #1 PREEMPT Mon Jul 8 12:20:50 UTC 2019
LK Ver: SWI9X07Y_02.28.03.05
RootFS Ver: SWI9X07Y_02.28.03.05 2019-07-08_12:55:31
UserFS Ver: unknown
MCU Ver: unknown


how about this one "yocto\kernel\drivers\usb\host\ehci-msm-hsic.c "?