[meta-ti] musb_hdrc driver and "Qualcomm, Inc. Gobi Wireless Modem"
Leo Meza
leo.e.meza at gmail.com
Thu Sep 13 13:05:17 PDT 2018
I'm trying to get my target to recognize a USB-connected 4G LTE modem on
powerup....
My target is a beaglebone black (AM335x) using meta-ti "rocko" branch and
I've added a kernel config fragment with the following:
CONFIG_USB_NET_QMI_WWAN=m
My distro.conf file removes the usbgadget and usbhost features:
MACHINE_FEATURES_remove += " alsa usbgadget usbhost vfat"
So far, when I power up the target, it looks as though the musb-hdrc driver
is attaching to the USB Modem:
[ 15.467735] usbcore: registered new interface driver usbfs
[ 15.475891] am335x-phy-driver 47401300.usb-phy: 47401300.usb-phy supply
vcc not found, using dummy regulator
[ 15.483431] am335x-phy-driver 47401b00.usb-phy: 47401b00.usb-phy supply
vcc not found, using dummy regulator
[ 15.625497] pruss 4a300000.pruss: creating PRU cores and other child
platform devices
[ 15.639846] usbcore: registered new interface driver hub
[ 15.718440] usbcore: registered new device driver usb
[ 15.831900] remoteproc remoteproc1: 4a334000.pru is available
[ 15.837767] pru-rproc 4a334000.pru: PRU rproc node
/ocp/pruss_soc_bus at 4a326004/pruss at 0/pru at 34000 probed successfully
[ 15.867980] musb-hdrc musb-hdrc.1: MUSB HDRC host driver
[ 15.868016] musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus
number 1
[ 15.883041] hub 1-0:1.0: USB hub found
[ 15.883105] hub 1-0:1.0: 1 port detected
[ 15.961998] remoteproc remoteproc2: 4a338000.pru is available
[ 15.967859] pru-rproc 4a338000.pru: PRU rproc node
/ocp/pruss_soc_bus at 4a326004/pruss at 0/pru at 38000 probed successfully
[ 16.320431] usb 1-1: new high-speed USB device number 2 using musb-hdrc
[ 53.040523] random: crng init done
[ 53.044007] random: 7 urandom warning(s) missed due to ratelimiting
When I use "lsusb" I see this, and I'm unable to use the modem:
Bus 001 Device 002: ID 05c6:9008 Qualcomm, Inc. Gobi Wireless Modem (QDL
mode)
LSMOD shows this:
root at target:~# lsmod
Module Size Used by
pru_rproc 20480 0
musb_dsps 20480 0
pruss_intc 16384 1 pru_rproc
musb_hdrc 98304 1 musb_dsps
udc_core 28672 1 musb_hdrc
pruss 16384 1 pru_rproc
phy_am335x 16384 2
usbcore 204800 1 musb_hdrc
phy_generic 16384 1 phy_am335x
usb_common 16384 5
phy_am335x,udc_core,musb_hdrc,musb_dsps,usbcore
phy_am335x_control 16384 1 phy_am335x
pm33xx 16384 0
snd_soc_simple_card 16384 0
snd_soc_simple_card_utils 16384 1 snd_soc_simple_card
wkup_m3_rproc 16384 1
wkup_m3_ipc 16384 1 pm33xx
remoteproc 40960 3 pru_rproc,wkup_m3_rproc,wkup_m3_ipc
omap_aes_driver 24576 0
crypto_engine 16384 1 omap_aes_driver
omap_crypto 16384 1 omap_aes_driver
omap_sham 28672 0
ti_emif_sram 16384 1 pm33xx
pruss_soc_bus 16384 0
rtc_omap 20480 2
musb_am335x 16384 0
omap_wdt 16384 0
at24 16384 0
sch_fq_codel 20480 1
However, if I don't plug in the device until AFTER the system boots and I
login, then I see the cdc_wdm driver is gets registered and the cdc-wdm0
device is created:
root at target:~# [ 60.630559] usb 1-1: new high-speed USB device number 2
using musb-hdrc
[ 60.993246] usbcore: registered new interface driver cdc_wdm
[ 61.013436] qmi_wwan 1-1:1.2: cdc-wdm0: USB WDM device
[ 61.038279] qmi_wwan 1-1:1.2 wwan0: register 'qmi_wwan' at
usb-musb-hdrc.1-1, WWAN/QMI device, be:ce:e7:34:15:d8
[ 61.059967] usbcore: registered new interface driver qmi_wwan
LSUSB shows me this, and I'm able to use the modem:
root at target:~# lsusb
Bus 001 Device 002: ID 1bc7:1040 Telit Wireless Solutions
LSMOD shows this:
root at target:~# lsmod
Module Size Used by
qmi_wwan 28672 0
cdc_wdm 20480 1 qmi_wwan
usbnet 32768 1 qmi_wwan
pru_rproc 20480 0
pruss_intc 16384 1 pru_rproc
pruss 16384 1 pru_rproc
musb_dsps 20480 0
musb_hdrc 98304 1 musb_dsps
udc_core 28672 1 musb_hdrc
usbcore 204800 4 usbnet,qmi_wwan,cdc_wdm,musb_hdrc
phy_am335x 1[ 78.790878] random: crng init done
[ 78.799335] random: 7 urandom warning(s) missed due to ratelimiting
6384 2
phy_generic 16384 1 phy_am335x
usb_common 16384 5
phy_am335x,udc_core,musb_hdrc,musb_dsps,usbcore
phy_am335x_control 16384 1 phy_am335x
pm33xx 16384 0
snd_soc_simple_card 16384 0
snd_soc_simple_card_utils 16384 1 snd_soc_simple_card
wkup_m3_ipc 16384 1 pm33xx
wkup_m3_rproc 16384 1
remoteproc 40960 3 pru_rproc,wkup_m3_rproc,wkup_m3_ipc
omap_aes_driver 24576 0
crypto_engine 16384 1 omap_aes_driver
omap_crypto 16384 1 omap_aes_driver
omap_sham 28672 0
pruss_soc_bus 16384 0
ti_emif_sram 16384 1 pm33xx
rtc_omap 20480 2
at24 16384 0
omap_wdt 16384 0
musb_am335x 16384 0
sch_fq_codel 20480 1
And pointers on how I can get the drivers (cdc_wdm, qmi_wwan, etc) setup so
the USB modem is recognized at powerup instead of having to plug in the
device after powerup would be greatly appreciated.
Thanks in advance!
-Leo
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