USB HOST mode fails on OTG port with USB TTY in u-boot

Hi,

Finding it strange, that USB HOST mode fails when I boot the kernel on
u-boot enabled for usb tty mode.

I tried resetting the MUSB controller, for some time I felt like it
worked but it actually doesn't. I suspect it to be USB PHY power and
pulled in some patches from Felipe and Ajay Gupta - to enable the
session bits. But even this didn't help.

Now, I am looking for other suggestions to get this working :frowning:

More data:
- u-boot now supports USB TTY on OTG port for beagle.
- When this usb TTY mode is enabled in u-boot and kernel
(http://www.beagleboard.org/gitweb/?p=linux-2.6.git;a=shortlog;h=2.6.28-oe-r8)
is booted (with USB OTG enabled)
- USB ethernet gadget works fine
- USB Host doesn't work ( the board by default is setup for HOST mode
with mini A and hub + peripherals)
- when USB TTY is disabled in u-boot then HOST works fine in kernel
(same setup as above).

Any specific patch or code base to look at?

Regards,
Khasim

could you share some debugging messages ??

set musb's debug to level 5 and get those debugging for us :wink:

Hi,

Finding it strange, that USB HOST mode fails when I boot the kernel on
u-boot enabled for usb tty mode.

I tried resetting the MUSB controller, for some time I felt like it
worked but it actually doesn't. I suspect it to be USB PHY power and
pulled in some patches from Felipe and Ajay Gupta - to enable the
session bits. But even this didn't help.

Now, I am looking for other suggestions to get this working :frowning:

More data:
- u-boot now supports USB TTY on OTG port for beagle.
- When this usb TTY mode is enabled in u-boot and kernel
(http://www.beagleboard.org/gitweb/?p=linux-2.6.git;a=shortlog;h=2.6.28-oe-r8)
is booted (with USB OTG enabled)
- USB ethernet gadget works fine
- USB Host doesn't work ( the board by default is setup for HOST mode
with mini A and hub + peripherals)
- when USB TTY is disabled in u-boot then HOST works fine in kernel
(same setup as above).

Any specific patch or code base to look at?

could you share some debugging messages ??

set musb's debug to level 5 and get those debugging for us :wink:

--
balbi

This is what I have after enabling "CONFIG_USB_DEBUG" and
"CONFIG_USB_MUSB_DEBUG" - Not sure if this help in any way.

Starting kernel ...

Error, the USB hardware is not on B modeUncompressing Linux.....................
................................................................................
................................................................. done, booting
the kernel.
Linux version 2.6.28-omap1 (root@tiioss) (gcc version 4.2.1 (CodeSourcery Source
ry G++ Lite 2007q3-51)) #3 Wed Feb 18 18:26:34 IST 2009
CPU: ARMv7 Processor [411fc083] revision 3 (ARMv7), cr=10c5387f
CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
Machine: OMAP3 Beagle Board
Memory policy: ECC disabled, Data cache writeback
OMAP3430 ES3.0
SRAM: Mapped pa 0x40200000 to va 0xd7000000 size: 0x100000
Reserving 15728640 bytes SDRAM for VRAM
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024
Kernel command line: console=ttyS2,115200n8 console=tty0 root=/dev/ram0 rw ramdi
sk_size=32768 initrd=0x81600000,32M
Clocking rate (Crystal/DPLL/ARM core): 26.0/332/500 MHz
GPMC revision 5.0
IRQ: Found an INTC at 0xd8200000 (revision 4.0) with 96 interrupts
Total of 96 interrupts on 1 active controller
OMAP34xx GPIO hardware version 2.5
PID hash table entries: 1024 (order: 10, 4096 bytes)
OMAP clockevent source: GPTIMER12 at 32768 Hz
Console: colour dummy device 80x30
console [tty0] enabled
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 128MB 128MB = 256MB total
Memory: 206080KB available (4800K code, 425K data, 168K init)
Calibrating delay loop... 509.42 BogoMIPS (lpj=1990656)
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
net_namespace: 532 bytes
regulator: core version 0.5
NET: Registered protocol family 16
Found NAND on CS0
Registering NAND on CS0
OMAP DMA hardware revision 4.0
USB: No board-specific platform config found
OMAP DSS rev 2.0
OMAP DISPC rev 3.0
OMAP VENC rev 2
OMAP DSI rev 1.0
i2c_omap i2c_omap.1: bus 1 rev3.12 at 2600 kHz
twl4030: PIH (irq 7) chaining IRQs 368..375
twl4030: power (irq 373) chaining IRQs 376..383
twl4030: gpio (irq 368) chaining IRQs 384..401
i2c_omap i2c_omap.3: bus 3 rev3.12 at 400 kHz
SCSI subsystem initialized
twl4030_usb twl4030_usb: Initialized TWL4030 USB module
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
musb_hdrc: version 6.0, musb-dma, otg (peripheral+host), debug=0
musb_hdrc: USB OTG mode controller at d80ab000 using DMA, IRQ 92
regulator: VMMC1: 1850 <--> 3150 mV normal standby
regulator: VDAC: 1800 mV normal standby
regulator: VUSB1V5: 1500 mV normal standby
regulator: VUSB1V8: 1800 mV normal standby
regulator: VUSB3V1: 3100 mV normal standby
regulator: VSIM: 1800 <--> 3000 mV normal standby
Bluetooth: Core ver 2.13
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
cfg80211: Using static regulatory domain info
cfg80211: Regulatory domain: US
       (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
       (2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
       (5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
       (5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
       (5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
       (5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
       (5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
cfg80211: Calling CRDA for country: US
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
NET: Registered protocol family 1
checking if image is initramfs...it isn't (no cpio magic); looks like an initrd
Freeing initrd memory: 32768K
VFS: Disk quotas dquot_6.5.1
Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
JFFS2 version 2.2. (NAND) (SUMMARY) √ā(c) 2001-2006 Red Hat, Inc.
msgmni has been set to 466
alg: No test for stdrng (krng)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver4 ports, IRQ sharing enabled
serial8250.0: ttyS0 at MMIO 0x4806a000 (irq = 72) is a ST16654
serial8250.0: ttyS1 at MMIO 0x4806c000 (irq = 73) is a ST16654
serial8250.0: ttyS2 at MMIO 0x49020000 (irq = 74) is a ST16654
console [ttyS2] enabled
brd: module loaded
loop: module loaded
usbcore: registered new interface driver asix
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver rndis_host
usbcore: registered new interface driver zd1211rw
usbcore: registered new interface driver rndis_wlan
usbcore: registered new interface driver zd1201
usbcore: registered new interface driver usb8xxx
usbcore: registered new interface driver rtl8187
usbcore: registered new interface driver rt2500usb
usbcore: registered new interface driver rt73usb
usbcore: registered new interface driver p54usb
i2c /dev entries driver
input: triton2-pwrbutton as /class/input/input0
triton2 power button driver initialized
Driver 'sd' needs updating - please use bus_type methods
Driver 'sr' needs updating - please use bus_type methods
omap2-nand driver initializing
NAND device: Manufacturer ID: 0x2c, Chip ID: 0xba (Micron NAND 256MiB 1,8V 16-bi
t)
cmdlinepart partition parsing not available
Creating 5 MTD partitions on "omap2-nand":
0x00000000-0x00080000 : "X-Loader"
0x00080000-0x00260000 : "U-Boot"
0x00260000-0x00280000 : "U-Boot Env"
0x00280000-0x00680000 : "Kernel"
0x00680000-0x10000000 : "File System"
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-omap ehci-omap.0: OMAP-EHCI Host Controller
ehci-omap ehci-omap.0: new USB bus registered, assigned bus number 1
ehci-omap ehci-omap.0: irq 77, io mem 0x48064800
ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 3 ports detected
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: OMAP-EHCI Host Controller
usb usb1: Manufacturer: Linux 2.6.28-omap1 ehci_hcd
usb usb1: SerialNumber: ehci-omap.0
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
g_ether gadget: using random self ethernet address
g_ether gadget: using random host ethernet address
usb0: MAC 46:2f:ed:02:c8:94
usb0: HOST MAC ba:b2:d5:5b:4f:82
g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
g_ether gadget: g_ether ready
musb_hdrc musb_hdrc: MUSB HDRC host driver
musb_hdrc musb_hdrc: new USB bus registered, assigned bus number 2
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.28-omap1 musb-hcd
usb usb2: SerialNumber: musb_hdrc
mice: PS/2 mouse device common for all mice
input: gpio-keys as /class/input/input1
twl4030_rtc twl4030_rtc: rtc core: registered twl4030_rtc as rtc0
twl4030_rtc twl4030_rtc: Power up reset detected.
twl4030_rtc twl4030_rtc: Enabling TWL4030-RTC.
OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec
Bluetooth: HCI USB driver ver 2.10
usbcore: registered new interface driver hci_usb
Bluetooth: Broadcom Blutonium firmware driver ver 1.2
usbcore: registered new interface driver bcm203x
Bluetooth: Digianswer Bluetooth USB driver ver 0.10
usbcore: registered new interface driver bpa10x
Bluetooth: Generic Bluetooth SDIO driver ver 0.1
mmci-omap-hs mmci-omap-hs.0: Failed to get debounce clock
Registered led device: beagleboard::usr0
Registered led device: beagleboard::usr1
leds-gpio: probe of leds-gpio failed with error -22
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
Advanced Linux Sound Architecture Driver Version 1.0.18rc3.
usbcore: registered new interface driver snd-usb-audio
ASoC version 0.13.2
OMAP3 Beagle SoC init
TWL4030 Audio Codec init
asoc: twl4030 <-> omap-mcbsp-dai-(link_id) mapping ok
ALSA device list:
#0: omap3beagle (twl4030)
oprofile: using arm/armv7
TCP cubic registered
NET: Registered protocol family 17
NET: Registered protocol family 15
Bluetooth: L2CAP ver 2.11
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO (Voice Link) ver 0.6
Bluetooth: SCO socket layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM ver 1.10
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: HIDP (Human Interface Emulation) ver 1.2
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
ieee80211: 802.11 data/management/control stack, git-1.1.13

I am not sure, why I am not reading the DBG messages - digging more
into the code manually I found that session is not getting started.

        musb->is_active = 0;
        devctl = musb_readb(regs, MUSB_DEVCTL);
        devctl &= ~MUSB_DEVCTL_SESSION;

        if (is_otg_enabled(musb)) {
                /* session started after:
                 * (a) ID-grounded irq, host mode;
                 * (b) vbus present/connect IRQ, peripheral mode;
                 * (c) peripheral initiates, using SRP
                 */
                printk("\n OTG enabled \n");
                if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
                        musb->is_active = 1;
                else {
                        devctl |= MUSB_DEVCTL_SESSION;
                        printk("devctl updated \n");
----------------------------> when things work I see this message,
otherwise I don't.
                }

        } else if (is_host_enabled(musb)) {

How do I reset the VBUS?

Regards,
Khasim

I am not sure, why I am not reading the DBG messages - digging more
into the code manually I found that session is not getting started.

        musb->is_active = 0;
        devctl = musb_readb(regs, MUSB_DEVCTL);
        devctl &= ~MUSB_DEVCTL_SESSION;

        if (is_otg_enabled(musb)) {
                /* session started after:
                 * (a) ID-grounded irq, host mode;
                 * (b) vbus present/connect IRQ, peripheral mode;
                 * (c) peripheral initiates, using SRP
                 */
                printk("\n OTG enabled \n");
                if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
                        musb->is_active = 1;
                else {
                        devctl |= MUSB_DEVCTL_SESSION;
                        printk("devctl updated \n");
----------------------------> when things work I see this message,
otherwise I don't.
                }

        } else if (is_host_enabled(musb)) {

apply this:

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 2cc34fa..7731042 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -114,7 +114,7 @@

-unsigned musb_debug;
+unsigned musb_debug = 5;
module_param(musb_debug, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug message level. Default = 0");

How do I reset the VBUS?

what do you mean ? tell vbus to go off by hand ? You'd have to hack
drivers/usb/otg/twl4030-usb.c (on current kernel).

I added a TWL PHY RESET in the code base, this seems to fix the issue.
Patch is as given below, I was not able to use the twl_usb in
drivers/usb/otg directory so added the T2 call directly and found no
good place to add the register definition and value - so hard coding
it for now - Please suggest / comment your views on the same.

Tested:
- USB HOST mode
- USB Ethernet Gadget (Peripheral mode)
- USB TTY on u-boot

Khasim,

Any chance I can get a .bin file to try?

Gerald