USB OTG port does not appear to be working.

[Neelix]

Many thanks.   Have run the upgrade.   The issue is not reproducing at the moment,  but I've no doubt that it will within a few hours.   Hopefully once it does I'll be able to report something useful.

- Neelix

 

[Neelix]

Ok...   results.  I swear this thing only replicates if I'm not actually trying to replicate it at the time...

The first time I got what looked like a part of a memory dump filling the entire buffer,  but it didn't actually look very useful.  

The second time I got almost nothing, it seemed to start from 0 but didn't even seem to include all the usual stuff that happens in a normal boot sequence.

The third time I got a whole bunch of stuff that looks like it might be useful.

Hopefully there'll be something there you can use.

- Neelix

 

[notaz]

I've pushed out a firmware update with potential crashfix and fixes for some weird OTG hardware behavior seen on CC pandora, but not 1GHz (this is newer than what was posted on IRC recently).

 

[Linux-SWAT]

NAND-only ?

 

[Neelix]

I have to say its looking really good so far.   Have been busily swapping between various OTG devices and USBnet for a few hours now,  haven't seen any crashes at all, and everything I've tried this afternoon has worked first time when connected.

The only event of note was when I cycled the power on my MIDI keyboard too fast while it was connected.  

The kernel seems to have thrown and successfully handled an exception in that case, as there was a backtrace in dmesg,  but the system continued to work and  I was subsequently able to get the MIDI keyboard interface working again by disconnecting the keyboard and giving it a few seconds before reconnecting it.

For kicks I also tried connecting a USB hub to the OTG adapter,  and had my mouse, keyboard and MIDI keyboard all playing nicely together.

Many thanks for all the work you've been putting into this,  and for putting up with my whinging.

- Neelix

 

[porg]

I attempted a connection between a USB 1.1 device and the USB OTG port through a rather unconventional connection of cables and adapters…

Pandora <— USB OTG port <— Mini-B to Standard-A cable  <— Female-A to Female-A adapter (HongKong Amazon dealer) <— USB 1.1 device (simple mouse)

Don't know wether this could even work in theory — in practise however it did not work, and I would be keen on your feedback. Thanks!

I used the newest OS. USB networking (startup service) and USB host (through settings menu) were enabled.

dmesg log with inline notes of what I did when:

Spoiler

#1 — rebooted with usb service on

lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dmesg:

 

[    0.000000] Linux version 3.2.39 (notaz@pixelinis) (gcc version 4.5.2 (Sourcery G++ Lite 2011.03-41) ) #872 Sat Mar 23 02:56:41 EET 2013

[    0.000000] CPU: ARMv7 Processor [411fc083] revision 3 (ARMv7), cr=10c5387d

[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache

[    0.000000] Machine: Pandora Handheld Console

[    0.000000] Initialized persistent memory from 80fe0000-80ffffff

[    0.000000] cma: CMA: reserved 16 MiB at 9f000000

[    0.000000] Memory policy: ECC disabled, Data cache writeback

[    0.000000] On node 0 totalpages: 131072

[    0.000000] free_area_init_node: node 0, pgdat c05b236c, node_mem_map c05e4000

[    0.000000]   Normal zone: 1024 pages used for memmap

[    0.000000]   Normal zone: 0 pages reserved

[    0.000000]   Normal zone: 130048 pages, LIFO batch:31

[    0.000000] OMAP3430/3530 ES3.1 (l2cache iva sgx neon isp )

[    0.000000] Clocking rate (Crystal/Core/MPU): 26.0/332/500 MHz

[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768

[    0.000000] pcpu-alloc: [0] 0 

[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048

[    0.000000] Kernel command line: ubi.mtd=4 ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs rw rootflags=bulk_read vram=6272K omapfb.vram=0:3000K mmc_core.removable=0 quiet

[    0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)

[    0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)

[    0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)

[    0.000000] Memory: 512MB = 512MB total

[    0.000000] Memory: 497180k/497180k available, 27108k reserved, 0K highmem

[    0.000000] Virtual kernel memory layout:

[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)

[    0.000000]     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)

[    0.000000]     vmalloc : 0xe0800000 - 0xf8000000   ( 376 MB)

[    0.000000]     lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)

[    0.000000]     modules : 0xbf000000 - 0xc0000000   (  16 MB)

[    0.000000]       .text : 0xc0008000 - 0xc05436dc   (5358 kB)

[    0.000000]       .init : 0xc0544000 - 0xc0576000   ( 200 kB)

[    0.000000]       .data : 0xc0576000 - 0xc05b2ac0   ( 243 kB)

[    0.000000]        .bss : 0xc05b2ae4 - 0xc05e3ce0   ( 197 kB)

[    0.000000] SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

[    0.000000] NR_IRQS:410

[    0.000000] IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96 interrupts

[    0.000000] Total of 96 interrupts on 1 active controller

[    0.000000] OMAP clockevent source: GPTIMER1 at 32768 Hz

[    0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every 131071999ms

[    0.000000] Console: colour dummy device 80x30

[    0.000000] console [tty0] enabled

[    0.000244] Calibrating delay loop... 497.82 BogoMIPS (lpj=1941504)

[    0.039093] pid_max: default: 32768 minimum: 301

[    0.039428] Mount-cache hash table entries: 512

[    0.039916] Initializing cgroup subsys devices

[    0.040008] CPU: Testing write buffer coherency: ok

[    0.040283] hw perfevents: enabled with ARMv7 Cortex-A8 PMU driver, 5 counters available

[    0.040435] Setting up static identity map for 0x803e61f0 - 0x803e6248

[    0.041320] devtmpfs: initialized

[    0.059356] print_constraints: dummy: 

[    0.061004] NET: Registered protocol family 16

[    0.064025] DMA: preallocated 256 KiB pool for atomic coherent allocations

[    0.064483] GPMC revision 5.0

[    0.068664] OMAP GPIO hardware version 2.5

[    0.073211] omap_mux_init: Add partition: #1: core, flags: 0

[    0.081542] Reprogramming SDRC clock to 332000000 Hz

[    0.084442] hw-breakpoint: debug architecture 0x4 unsupported.

[    0.093902]  omap-mcbsp.2: alias fck already exists

[    0.094299]  omap-mcbsp.3: alias fck already exists

[    0.096191] OMAP DMA hardware revision 4.0

[    0.117340] bio: create slab <bio-0> at 0

[    0.118865] print_constraints: vwlan: 1800 mV 

[    0.120910] SCSI subsystem initialized

[    0.124053] usbcore: registered new interface driver usbfs

[    0.124359] usbcore: registered new interface driver hub

[    0.124694] usbcore: registered new device driver usb

[    0.140747] omap_i2c omap_i2c.1: bus 1 rev1.3.12 at 2600 kHz

[    0.144592] twl4030: PIH (irq 7) chaining IRQs 368..375

[    0.144714] twl4030: power (irq 373) chaining IRQs 376..383

[    0.145416] twl4030: gpio (irq 368) chaining IRQs 384..401

[    0.145996] _omap_mux_init_gpio: Could not set gpio192

[    0.147399] _omap_mux_init_gpio: Could not set gpio193

[    0.150817] print_constraints: VUSB1V5: 1500 mV normal standby

[    0.151672] print_constraints: VUSB1V8: 1800 mV normal standby

[    0.152526] print_constraints: VUSB3V1: 3100 mV normal standby

[    0.211029] twl4030_usb twl4030_usb: Initialized TWL4030 USB module

[    0.212829] print_constraints: vdd_mpu_iva: 600 <--> 1450 mV normal 

[    0.213653] print_constraints: vdd_core: 600 <--> 1450 mV normal 

[    0.214569] print_constraints: VMMC1: 1850 <--> 3150 mV at 3150 mV normal standby

[    0.215484] print_constraints: VDAC: 1800 mV normal standby

[    0.216369] print_constraints: VAUX2: 1800 mV normal standby

[    0.217254] print_constraints: VPLL2: 1800 mV normal standby

[    0.218170] print_constraints: VMMC2: 1850 <--> 3150 mV at 3150 mV normal standby

[    0.219116] print_constraints: VSIM: 2800 mV normal standby

[    0.219940] print_constraints: VAUX1: 3000 mV normal standby

[    0.220764] print_constraints: VAUX4: 3000 mV normal standby

[    0.234497] omap_i2c omap_i2c.3: bus 3 rev1.3.12 at 100 kHz

[    0.237457] omap-iommu omap-iommu.0: isp registered

[    0.238281] Advanced Linux Sound Architecture Driver Version 1.0.24.

[    0.239318] Switching to clocksource 32k_counter

[    0.269134] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)

[    0.274932] musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)

[    0.274963] musb-hdrc: MHDRC RTL version 1.400 

[    0.274963] musb-hdrc: setup fifo_mode 4

[    0.274993] musb-hdrc: 28/31 max ep, 16384/16384 memory

[    0.275634] musb-hdrc musb-hdrc: USB OTG mode controller at fa0ab000 using DMA, IRQ 92

[    0.276763] NET: Registered protocol family 2

[    0.276977] IP route cache hash table entries: 4096 (order: 2, 16384 bytes)

[    0.277404] TCP established hash table entries: 16384 (order: 5, 131072 bytes)

[    0.277832] TCP bind hash table entries: 16384 (order: 4, 65536 bytes)

[    0.278076] TCP: Hash tables configured (established 16384 bind 16384)

[    0.278106] TCP reno registered

[    0.278137] UDP hash table entries: 256 (order: 0, 4096 bytes)

[    0.278167] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

[    0.278472] NET: Registered protocol family 1

[    0.278991] NetWinder Floating Point Emulator V0.97 (double precision)

[    0.285949] HugeTLB registered 2 MB page size, pre-allocated 0 pages

[    0.306365] VFS: Disk quotas dquot_6.5.2

[    0.306915] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)

[    0.313201] msgmni has been set to 1003

[    0.315704] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)

[    0.315704] io scheduler noop registered

[    0.315734] io scheduler deadline registered

[    0.315795] io scheduler cfq registered (default)

[    0.331207] OMAP DSS rev 2.0

[    0.335571] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled

[    0.338287] omap_uart.0: ttyO0 at MMIO 0x4806a000 (irq = 72) is a OMAP UART0

[    0.338867] omap_uart.1: ttyO1 at MMIO 0x4806c000 (irq = 73) is a OMAP UART1

[    0.339385] omap_uart.2: ttyO2 at MMIO 0x49020000 (irq = 74) is a OMAP UART2

[    0.354949] brd: module loaded

[    0.362701] loop: module loaded

[    0.362792] OMAP overclocker loaded.

[    0.365692] omap2-nand driver initializing

[    0.365875] NAND device: Manufacturer ID: 0x2c, Chip ID: 0xbc (Micron NAND 512MiB 1,8V 16-bit)

[    0.366424] Creating 5 MTD partitions on "omap2-nand.0":

[    0.366485] 0x000000000000-0x000000080000 : "xloader"

[    0.367462] 0x000000080000-0x000000260000 : "uboot"

[    0.368591] 0x000000260000-0x000000280000 : "uboot-env"

[    0.369384] 0x000000280000-0x000000c80000 : "boot"

[    0.371948] 0x000000c80000-0x000020000000 : "rootfs"

[    0.462463] UBI: attaching mtd4 to ubi0

[    1.560577] UBI: scanning is finished

[    1.578094] UBI: attached mtd4 (name "rootfs", size 499 MiB) to ubi0

[    1.578125] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 129024 bytes

[    1.578155] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 512

[    1.578155] UBI: VID header offset: 512 (aligned 512), data offset: 2048

[    1.578186] UBI: good PEBs: 3996, bad PEBs: 0, corrupted PEBs: 0

[    1.578186] UBI: user volume: 1, internal volumes: 1, max. volumes count: 128

[    1.578216] UBI: max/mean erase counter: 33/7, WL threshold: 4096, image sequence number: 1067625662

[    1.578247] UBI: available PEBs: 0, total reserved PEBs: 3996, PEBs reserved for bad PEB handling: 39

[    1.578277] UBI: attaching mtd3 to ubi1

[    1.578765] UBI: background thread "ubi_bgt0d" started, PID 569

[    1.601104] UBI: scanning is finished

[    1.609741] UBI: attached mtd3 (name "boot", size 10 MiB) to ubi1

[    1.609741] UBI: PEB size: 131072 bytes (128 KiB), LEB size: 129024 bytes

[    1.609771] UBI: min./max. I/O unit sizes: 2048/2048, sub-page size 512

[    1.609802] UBI: VID header offset: 512 (aligned 512), data offset: 2048

[    1.609802] UBI: good PEBs: 80, bad PEBs: 0, corrupted PEBs: 0

[    1.609832] UBI: user volume: 1, internal volumes: 1, max. volumes count: 128

[    1.609832] UBI: max/mean erase counter: 10/3, WL threshold: 4096, image sequence number: 1344244902

[    1.609863] UBI: available PEBs: 0, total reserved PEBs: 80, PEBs reserved for bad PEB handling: 2

[    1.610107] UBI: background thread "ubi_bgt1d" started, PID 574

[    1.610229] usbcore: registered new interface driver libusual

[    1.611053] mousedev: PS/2 mouse device common for all mice

[    1.611785] input: keypad as /devices/platform/omap_i2c.1/i2c-1/1-004a/twl4030_keypad/input/input0

[    1.615722] input: power-button as /devices/platform/omap_i2c.1/i2c-1/1-0049/twl4030_pwrbutton/input/input1

[    1.617340] input: nub0 as /devices/platform/omap_i2c.3/i2c-3/3-0066/input/input2

[    1.619049] input: nub1 as /devices/platform/omap_i2c.3/i2c-3/3-0067/input/input3

[    1.625579] twl_rtc twl_rtc: rtc core: registered twl_rtc as rtc0

[    1.626586] i2c /dev entries driver

[    1.631408] bq27x00-battery 3-0055: support ver. 1.2.0 enabled

[    1.655487] OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec

[    1.655975] twl4030_wdt twl4030_wdt: Failed to register misc device

[    1.656036] twl4030_wdt: probe of twl4030_wdt failed with error -16

[    1.656646] voltdm_scale: No voltage scale API registered for vdd_mpu_iva

[    1.656707] platform mpu.0: omap_target: unable to scale voltage up.

[    1.657135] cpuidle: using governor ladder

[    1.657135] cpuidle: using governor menu

[    1.884338] Registered led device: pandora::sd1

[    1.884643] Registered led device: pandora::sd2

[    1.884887] Registered led device: pandora::bluetooth

[    1.885192] Registered led device: pandora::wifi

[    1.886474] Registered led device: pandora::keypad_bl

[    1.887573] Registered led device: pandora:ower

[    1.905944] Registered led device: pandora::charger

[    1.907409] usbcore: registered new interface driver usbhid

[    1.907409] usbhid: USB HID core driver

[    1.907592] persistent_ram: found existing buffer, size 981, start 981

[    1.912170] console [ram-1] enabled

[    1.914886] OMAP3 Pandora SoC init

[    1.996704] asoc: twl4030-hifi <-> omap-mcbsp-dai.1 mapping ok

[    1.999145] asoc: twl4030-hifi <-> omap-mcbsp-dai.3 mapping ok

[    2.001831] ALSA device list:

[    2.001861]   #0: omap3pandora

[    2.002044] TCP cubic registered

[    2.002044] NET: Registered protocol family 17

[    2.002136] NET: Registered protocol family 15

[    2.002136] Registering the dns_resolver key type

[    2.002227] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 1

[    2.002227] ThumbEE CPU extension supported.

[    2.002288] Registering SWP/SWPB emulation handler

[    2.009857] clock: disabling unused clocks to save power

[    2.011230] registered taskstats version 1

[    2.035095] Console: switching to colour frame buffer device 100x30

[    2.218811] regulator_init_complete: VAUX2: incomplete constraints, leaving on

[    2.222778] input: gpio-keys as /devices/platform/gpio-keys/input/input4

[    2.224853] twl_rtc twl_rtc: setting system clock to 2013-05-08 21:44:13 UTC (1368049453)

[    2.226989] UBIFS: background thread "ubifs_bgt0_0" started, PID 670

[    2.231994] mmc0: host does not support reading read-only switch. assuming write-enable.

[    2.233795] mmc0: new high speed SDHC card at address 0001

[    2.234802] mmcblk0: mmc0:0001 00000 7.46 GiB 

[    2.237243]  mmcblk0: p1 p2 p3

[    2.314147] UBIFS: mounted UBI device 0, volume 0, name "rootfs"(null)

[    2.314178] UBIFS: LEB size: 129024 bytes (126 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes

[    2.314208] UBIFS: FS size: 508612608 bytes (485 MiB, 3942 LEBs), journal size 9033728 bytes (8 MiB, 71 LEBs)

[    2.314208] UBIFS: reserved for root: 0 bytes (0 KiB)

[    2.314239] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 3234489E-AD5D-47B1-9185-67A86C6B3788, small LPT model

[    2.315124] VFS: Mounted root (ubifs filesystem) on device 0:14.

[    2.316040] devtmpfs: mounted

[    2.316558] Freeing init memory: 200K

[    2.516754] mmc1: host does not support reading read-only switch. assuming write-enable.

[    2.518737] mmc1: new high speed SDHC card at address b368

[    2.521148] mmcblk1: mmc1:b368 H2555 14.9 GiB 

[    2.524139]  mmcblk1: p1

[    2.628356] mmc2: card claims to support voltages below the defined range. These will be ignored.

[    2.629547] mmc2: new SDIO card at address 0001

[    3.290100] udevd (729): /proc/729/oom_adj is deprecated, please use /proc/729/oom_score_adj instead.

[   30.677764] ads7846 spi1.0: touchscreen, irq 254

[   30.678741] input: touchscreen as /devices/platform/omap2_mcspi.1/spi_master/spi1/spi1.0/input/input5

[   39.205902] FAT-fs (mmcblk1): bogus number of reserved sectors

[   39.206054] FAT-fs (mmcblk1): Can't find a valid FAT filesystem

[   39.299194] FAT-fs (mmcblk0): invalid media value (0x00)

[   39.299468] FAT-fs (mmcblk0): Can't find a valid FAT filesystem

[   40.833923] FAT-fs (mmcblk1): bogus number of reserved sectors

[   40.834075] FAT-fs (mmcblk1): Can't find a valid FAT filesystem

[   40.856872] FAT-fs (mmcblk0): invalid media value (0x00)

[   40.857116] FAT-fs (mmcblk0): Can't find a valid FAT filesystem

[   41.886352] EXT3-fs (mmcblk0p2): error: unrecognized mount option "umask=0" or missing value

[   41.993011] kjournald starting.  Commit interval 5 seconds

[   41.993072] EXT3-fs (mmcblk0p2): warning: maximal mount count reached, running e2fsck is recommended

[   42.012054] EXT3-fs (mmcblk0p2): using internal journal

[   42.012084] EXT3-fs (mmcblk0p2): mounted filesystem with ordered data mode

[   42.111541] alignment: ignoring faults is unsafe on this CPU.  Defaulting to fixup mode.

[   42.393341] fuse init (API version 7.17)

[   42.523773] NET: Registered protocol family 10

[   42.694458] zram: module is from the staging directory, the quality is unknown, you have been warned.

[   42.696838] zram: num_devices not specified. Using default: 1

[   42.696868] zram: Creating 1 devices ...

[   42.888427] UBIFS: background thread "ubifs_bgt1_0" started, PID 1671

[   42.986694] UBIFS: mounted UBI device 1, volume 0, name "boot"(null)

[   42.986724] UBIFS: LEB size: 129024 bytes (126 KiB), min./max. I/O unit sizes: 2048 bytes/2048 bytes

[   42.986724] UBIFS: FS size: 8386560 bytes (7 MiB, 65 LEBs), journal size 1032193 bytes (0 MiB, 6 LEBs)

[   42.986755] UBIFS: reserved for root: 396117 bytes (386 KiB)

[   42.986785] UBIFS: media format: w4/r0 (latest is w4/r0), UUID 46867242-27F5-445A-A362-3234F85D2809, small LPT model

[   43.525817] zram: disk size not provided. You can use disksize_kb module param to specify size.

[   43.525817] Using default: (25% of RAM).

[   43.526641] FAT-fs (zram0): bogus number of reserved sectors

[   43.526885] FAT-fs (zram0): Can't find a valid FAT filesystem

[   44.076202] FAT-fs (zram0): bogus number of reserved sectors

[   44.076354] FAT-fs (zram0): Can't find a valid FAT filesystem

[   47.417541] input: nub0 as /devices/platform/omap_i2c.3/i2c-3/3-0066/input/input6

[   47.498992] input: nub1 as /devices/platform/omap_i2c.3/i2c-3/3-0067/input/input7

[   47.641754] Adding 128436k swap on /dev/zram0.  Priority:5 extents:1 across:128436k SS

[   49.156036] SGX clock rate 110 MHz

[   50.541290]  gadget: using random self ethernet address

[   50.541320]  gadget: using random host ethernet address

[   50.545227] usb0: MAC aa:d0:31:a0:92:e2

[   50.545227] usb0: HOST MAC 36:44:60:8d:cc:0d

[   50.554748]  gadget: CDC Composite Gadget, version: King Kamehameha Day 2008

[   50.554809]  gadget: g_cdc ready

[   50.570159] musb-hdrc musb-hdrc: MUSB HDRC host driver

[   50.570281] musb-hdrc musb-hdrc: new USB bus registered, assigned bus number 1

[   50.570404] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002

[   50.570434] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1

[   50.570434] usb usb1: Product: MUSB HDRC host driver

[   50.570434] usb usb1: Manufacturer: Linux 3.2.39 musb-hcd

[   50.570465] usb usb1: SerialNumber: musb-hdrc

[   50.572845] hub 1-0:1.0: USB hub found

[   50.572906] hub 1-0:1.0: 1 port detected

[   68.487670] Bluetooth: Core ver 2.16

[   68.498504] NET: Registered protocol family 31

[   68.498504] Bluetooth: HCI device and connection manager initialized

[   68.498535] Bluetooth: HCI socket layer initialized

[   68.498535] Bluetooth: L2CAP socket layer initialized

[   68.500885] Bluetooth: SCO socket layer initialized

 

#2 — plugging in device to OTG port via adapter

# Pandora OTG <— USB Mini A to Standard-A <— Female Standard-A to Female Standard-A <- Device with Standard-A cable 

lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dmesg: Nothing additional happened within dmesg

 

#3 — enabling host mode

lsusb:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dmesg:

 

[  227.697021] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

[  228.708221] ehci-omap ehci-omap.0: OMAP-EHCI Host Controller

[  228.708251] sched: RT throttling activated

[  228.708404] ehci-omap ehci-omap.0: new USB bus registered, assigned bus number 2

[  228.709930] ehci-omap ehci-omap.0: irq 77, io mem 0x48064800

[  228.724151] ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00

[  228.724273] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002

[  228.724304] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1

[  228.724304] usb usb2: Product: OMAP-EHCI Host Controller

[  228.724334] usb usb2: Manufacturer: Linux 3.2.39 ehci_hcd

[  228.724334] usb usb2: SerialNumber: ehci-omap.0

[  228.727050] hub 2-0:1.0: USB hub found

[  228.727111] hub 2-0:1.0: 3 ports detected

 

#4 — unplugging, replugging

lsusb:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dmesg: Nothing additional happened within dmesg

 

#5 — disable usb host

lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

dmesg:

 

[  363.611358] ehci-omap ehci-omap.0: remove, state 4

[  363.611389] usb usb2: USB disconnect, device number 1

[  363.630432] ehci-omap ehci-omap.0: USB bus 2 deregistered

[  607.942871] squashfs: version 4.0 (2009/01/31) Phillip Lougher

[  608.251434] aufs 3.2-20120109

[  608.270538] aufs test_add:261:mount[2535]: uid/gid/perm /mnt/pnd/gedit 1000/1000/0755, 0/0/0777

 

[Neelix]

That's not surprising, as it's not designed to work that way.  The mini USB connector has 5 pins.  The USB mini-A connectors used for OTG adapter cables have two of those pins shorted to switch the device into host mode.  In this case  The cable with the mini-B connector you used did not have the shorted pins, so the pandora remained in device mode.

The exception to this is that many cheap OTG adapter cables actually use a mini-b connector and short the pins to make it electrically equivalent to a mini-A connector, presumably because they are cheaper or have better availability than actual mini-A connectors.

- Neelix

 

[Loonie]

As Neelix says, mini-USB type A shorts pin 4 to ground, which puts the Pandora in host mode. Type B leaves the pin open, and leaves the Pandora in peripheral mode. Unless a mini USB type A cable is plugged into the OTG port, Pandora will not act as a host.

 

[porg]

Guy, thanks for your info! If I would myself solder the adapter in the fashion, that pin 4 is connected to ground, it would work then?

 

[DAP]

There is no telling how the A-female to A-female connector is wired. There is no application for this part, and I always wondered why it existed, and who would buy it.

My suggestion is to just buy a mini-B to A female adapter (It would be better to get a mini-A to A female adapter, but it seems no one makes them anymore).

 

[Binky]

http://www.amazon.co.uk/Ex-Pro-Cable-Adapter-Mini-A-plug/dp/B003MB4YXI/ref=pd_bxgy_computers_img_y/279-1208628-2755426

http://www.amazon.co.uk/OTG-Cable-Adapter-Mini-A-plug/dp/B000EORX7U/ref=sr_1_54?s=electronics&ie=UTF8&qid=1368212246&sr=1-54&keywords=miniUSB-A

 

[Neelix]

My suggestion is to just buy a mini-B to A female adapter (It would be better to get a mini-A to A female adapter, but it seems no one makes them anymore).

You know I have a vague recollection that my first ever post on these boards was to suggest exactly that,   but as was quickly pointed out to me that's not likely to work.  

When you are searching you should look specifically for an OTG adapter. Then choose one which is mini to A female.

- Neelix

 

[wdt]

Mini A and mini B are slightly different in shape


There will be at least 3 places to buy on eBay


miniA to A female is what you want.


look for miniA


99.99% of common cables are miniB

 

[Binky]

http://www.amazon.co.uk/Ex-Pro-Cable-Adapter-Mini-A-plug/dp/B003MB4YXI/ref=pd_bxgy_computers_img_y/279-1208628-2755426

http://www.amazon.co.uk/OTG-Cable-Adapter-Mini-A-plug/dp/B000EORX7U/ref=sr_1_54?s=electronics&ie=UTF8&qid=1368212246&sr=1-54&keywords=miniUSB-A

I think these are the right shape...

 

[frefol]

My mom just got a USB keyboard for her tablet and it had an extra OTG adapter; her tablet has a microB port and they shipped both microB and miniB OTG adapters.  I figured it would not work since it is a miniB instead of miniA but it worked just fine on my Pandora.  I was about to buy an adapter when she got the keyboard so now I don't have to.

 

[porg]

@frefol: So both Mini-A and Mini-B work. This fits to the description in the wiki:

For better clarity the legend within the photo should better read "Mini-A or Mini-B" instead of "miniAB" (which is confusing).

I would buy this one (3.9 EUR + free shipping).   Ok?

 

[Binky]

So:

The pandora's socket is miniAB

This can take either miniA or miniB

It has five pins, the fifth one determines host/slave mode

The wiring of the fifth pin should correlate to the plug type, but sometimes doesn't

 

[frefol]

I took some pictures of my adapter.



And here is a picture of a minA adapter on top of the miniB adapter. 



I didn't even realize I had the miniA adapter until a couple minutes ago.  It also works fine on my Pandora.

 

[DAP]

http://www.amazon.co.uk/Ex-Pro-Cable-Adapter-Mini-A-plug/dp/B003MB4YXI/ref=pd_bxgy_computers_img_y/279-1208628-2755426

http://www.amazon.co.uk/OTG-Cable-Adapter-Mini-A-plug/dp/B000EORX7U/ref=sr_1_54?s=electronics&ie=UTF8&qid=1368212246&sr=1-54&keywords=miniUSB-A

When I bought my USB OTG adaptor, I went through the entire set of listings on Amazon (us), and only saw one device that showed the mini-A connector in the picture (did not mention the type of connector in the text). I bought that, but what I got had a mini-B connector on it. I was annoyed, but it did work.

 

[lingenfr]

For kicks I also tried connecting a USB hub to the OTG adapter,  and had my mouse, keyboard and MIDI keyboard all playing nicely together.

- Neelix

This is what I would like to do as well. So far, no joy. I am assuming the problem is my OTG cable which is a universal that I bought off eBay. It is a B rather than an A connector. When I plug my powered USB 3.0 hub (which works fine with the other USB port on the P) into the OTG adapter, I get nothing. I am watching dmesg, but frankly it is spewing so many messages it is hard to read. I have a USB keyboard, mouse and my Edimax USB wifi adapter plugged in to the hub. The keyboard and mouse should be USB 1.0, don't know about the wifi adapter. My hub does not even light. If I plug just my mouse into the OTG adapter, it has power, but does not function. Before I continue buying cables, I would like to pin down where I went wrong. USB networking is enabled at startup and USB host is enabled. Any assistance is appreciated.