g_mass_storage is not working on i.mx6q

[devjyc]

My env is imx6q, kernel 4.9.11 (evm board + windows7 pc)

I run modprobe, it looks like no problem. but when i plugged otg cable, no action occurs.

What should I check more? thank you.

> script

FILE=/dev/shm/20M

dd if=/dev/zero of=$FILE bs=1M count=20

# mkfs, mount test

modprobe g_mass_storage file=$FILE stall=0 removable=1

> my log

[ 114.613542] udc ci_hdrc.0: registering UDC driver [g_mass_storage]
[ 114.613610] Mass Storage Function, version: 2009/09/11
[ 114.617508] LUN: removable file: (no medium)
[ 114.620730] lun0: open backing file: /dev/shm/20M
[ 114.620743] LUN: removable file: /dev/shm/20M
[ 114.623819] Number of LUNs=1
[ 114.625413] g_mass_storage gadget: adding config #1 'Linux File-Backed Storage'/7f03c63c
[ 114.625425] g_mass_storage gadget: adding 'Mass Storage Function'/d8ce5a80 to config 'Linux File-Backed Storage'/7f03c63c
[ 114.625571] g_mass_storage gadget: I/O thread pid: 466
[ 114.625596] g_mass_storage gadget: cfg 1/7f03c63c speeds: high full
[ 114.625604] g_mass_storage gadget: interface 0 = Mass Storage Function/d8ce5a80
[ 114.625618] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11
[ 114.631416] g_mass_storage gadget: g_mass_storage ready

> file system

root@localhost:~> lsmod
Module Size Used by
g_mass_storage 4516 0
usb_f_mass_storage 43408 2 g_mass_storage
libcomposite 46541 2 g_mass_storage,usb_f_mass_storage
configfs 28232 3 usb_f_mass_storage,libcomposite
mxc_dcic 6640 0

root@localhost:/lib/modules/4.9.11-g4eb3de5-dirty/kernel/drivers/usb/gadget/function>
total 360
drwxrwxr-x 2 localhost tracing 4096 Apr 24 09:19 .
drwxrwxr-x 4 localhost tracing 4096 Apr 24 09:19 ..
-rw-rw-r-- 1 localhost  tracing 24228 Apr 24 09:19 u_ether.ko
-rw-rw-r-- 1 localhost tracing 21792 Apr 24 09:19 u_serial.ko
-rw-rw-r-- 1 localhost tracing 13864 Apr 24 09:19 usb_f_acm.ko
-rw-rw-r-- 1 localhost tracing 17868 Apr 24 09:19 usb_f_ecm.ko
-rw-rw-r-- 1 localhost tracing 13196 Apr 24 09:19 usb_f_ecm_subset.ko
-rw-rw-r-- 1 localhost tracing 16484 Apr 24 09:19 usb_f_eem.ko
-rw-rw-r-- 1 localhost tracing 52828 Apr 24 09:19 usb_f_fs.ko
-rw-rw-r-- 1 localhost tracing 64676 Apr 24 09:19 usb_f_mass_storage.ko
-rw-rw-r-- 1 localhost tracing 27316 Apr 24 09:19 usb_f_ncm.ko
-rw-rw-r-- 1 localhost tracing 10760 Apr 24 09:19 usb_f_obex.ko
-rw-rw-r-- 1 localhost tracing 33904 Apr 24 09:19 usb_f_rndis.ko
-rw-rw-r-- 1 localhost tracing 9620 Apr 24 09:19 usb_f_serial.ko
-rw-rw-r-- 1 localhost tracing 25232 Apr 24 09:19 usb_f_ss_lb.ko

root@localhost:/lib/modules/4.9.11-g4eb3de5-dirty/kernel/drivers/usb/gadget/legacy>
total 112
drwxrwxr-x 2 localhost tracing 4096 Apr 24 09:19 .
drwxrwxr-x 4 localhost tracing 4096 Apr 24 09:19 ..
-rw-rw-r-- 1 localhost tracing 13372 Apr 24 09:19 g_ether.ko
-rw-rw-r-- 1 localhost tracing 13320 Apr 24 09:19 g_mass_storage.ko
-rw-rw-r-- 1 localhost tracing 10864 Apr 24 09:19 g_ncm.ko
-rw-rw-r-- 1 localhost tracing 11380 Apr 24 09:19 g_serial.ko
-rw-rw-r-- 1 localhost tracing 16268 Apr 24 09:19 g_zero.ko
-rw-rw-r-- 1 localhost tracing 31932 Apr 24 09:19 gadgetfs.ko

> kernel config

309 CONFIG_USB=y
310 CONFIG_USB_OTG_WHITELIST=y
311 CONFIG_USB_EHCI_HCD=y
312 CONFIG_USB_EHCI_MXC=y
313 CONFIG_USB_HCD_TEST_MODE=y
314 CONFIG_USB_ACM=m
315 CONFIG_USB_STORAGE=y
316 CONFIG_USB_CHIPIDEA=y
317 CONFIG_USB_CHIPIDEA_UDC=y
318 CONFIG_USB_CHIPIDEA_HOST=y
319 CONFIG_USB_SERIAL=m
320 CONFIG_USB_SERIAL_GENERIC=y
321 CONFIG_USB_SERIAL_FTDI_SIO=m
322 CONFIG_USB_SERIAL_OPTION=m
323 CONFIG_USB_TEST=m
324 CONFIG_USB_EHSET_TEST_FIXTURE=y
325 CONFIG_NOP_USB_XCEIV=y
326 CONFIG_USB_MXS_PHY=y
327 CONFIG_USB_GADGET=y
328 CONFIG_USB_CONFIGFS=m
329 CONFIG_USB_CONFIGFS_SERIAL=y
330 CONFIG_USB_CONFIGFS_ACM=y
331 CONFIG_USB_CONFIGFS_OBEX=y
332 CONFIG_USB_CONFIGFS_NCM=y
333 CONFIG_USB_CONFIGFS_ECM=y
334 CONFIG_USB_CONFIGFS_ECM_SUBSET=y
335 CONFIG_USB_CONFIGFS_RNDIS=y
336 CONFIG_USB_CONFIGFS_EEM=y
337 CONFIG_USB_CONFIGFS_MASS_STORAGE=y
338 CONFIG_USB_CONFIGFS_F_LB_SS=y
339 CONFIG_USB_CONFIGFS_F_FS=y
340 CONFIG_USB_ZERO=m
341 CONFIG_USB_ETH=m
342 CONFIG_USB_G_NCM=m
343 CONFIG_USB_GADGETFS=m
344 CONFIG_USB_MASS_STORAGE=m
345 CONFIG_USB_G_SERIAL=m

465 CONFIG_USB_OTG=y
466 CONFIG_USB_OTG_FSM=y
467 CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
468 CONFIG_USB_GADGET_DEBUG=y
469 CONFIG_USB_GADGET_VERBOSE=y
470 CONFIG_USB_MV_UDC=y
471 CONFIG_USB_XHCI_HCD=y
472 CONFIG_USB_XHCI_PLATFORM=y

> my dts

&usbotg {

    pinctrl-names = "default";

    pinctrl-0 = <&pinctrl_usbotg>;

    disable-over-current;

    srp-disable;

    hnp-disable;

    adp-disable;

    status = "okay";

};

        pinctrl_usbotg: usbotggrp {

            fsl,pins = <

                MX6QDL_PAD_ENET_RX_ER__USB_OTG_ID   0x17059

            >;

        };

[jimmychan]

Please refer to the chapter 4.10.2.8 USB OTG HNP and SRP Support in i.MX_Linux_Reference_Manual.pdf

you can download the BSP document from here

i.MX Software | NXP