[U-Boot] Fastboot and MUSB driver on OMAP3

[Paul Kocialkowski <contact@paulk.fr>]

> On the host side, I get the following messages from dmesg:
> 
> [11281.565099] usb 3-1: new high-speed USB device number 39 using xhci_hcd
> [11283.178280] usb 3-1: Device not responding to set address.
> [11283.378663] usb 3-1: Device not responding to set address.
> [11283.579739] usb 3-1: device not accepting address 39, error -71
> [11283.939123] usb 3-1: new high-speed USB device number 41 using xhci_hcd
> [11283.939313] usb 3-1: Device not responding to set address.
> [11284.140316] usb 3-1: Device not responding to set address.
> [11284.341381] usb 3-1: device not accepting address 41, error -71

I investigated a bit further and added a few debug prints to U-Boot. If
I understand correctly, IRQs are not actually being used and the
fastboot command is polling on usb_gadget_handle_interrupts.

The status so far is that it still doesn't work on the host. As far as I
can see, it doesn't get as far as enumerating the endpoints (see the log
below).

The SET_ADDRESS request is received just fine, it then sets
musb->ep0_state = MUSB_EP0_STAGE_STATUSIN; but no IRQ arrives to trigger
another call to musb_g_ep0_irq. Eventually, the host just sends back
another SET_REQUEST. Looking at dmesg on the host (Device not responding
to set address), I guess that the device should send something back and
it apparently doesn't.

Do you have any clue?

Here is the relevant U-Boot log:

U-Boot SPL 2015.01-rc2-gfc9200f-dirty (Dec 15 2014 - 17:59:56)
reading u-boot.img
reading u-boot.img


U-Boot 2015.01-rc2-gfc9200f-dirty (Dec 15 2014 - 17:59:56)

OMAP36XX/37XX-GP ES1.2, CPU-OPP2, L3-200MHz, Max CPU Clock 1 Ghz
Sniper + LPDDR/MMC
I2C:   ready
DRAM:  512 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
Using default environment

In:    serial
Out:   serial
Err:   serial
musb_register
musb_init_controller
omap2430_musb_init
HS USB OTG: revision 0x40, sysconfig 0x1008, sysstatus 0x1, intrfsel 0x1, simenable  0x0
omap2430_musb_disable
musb_gadget_setup
USB Peripheral mode controller at 480ab000 using PIO, IRQ 0
Hit any key to stop autoboot:  0 
usb_gadget_register_driver
musb_gadget_start
musb_start
omap2430_musb_enable
fastboot_add
adding 'f_fastboot'/9fe55240 to config 'usb_dnload'/9fe55180
fastboot_bind IN
fastboot_bind OUT
generic_interrupt: 45 1 0
** IRQ peripheral usb002d tx0001 rx0000
<== Power=f0, DevCtl=98, int_usb=0x2d
csr 0001, count 8, myaddr 0, ep0stage idle
musb-hdrc: peripheral reset irq lost!
musb_g_ep0_irq: power: 0xf0 speed: 0x3
new ep0 state is 6
service_zero_data_request()
service_zero_data_request: SET_ADDRESS
new ep0 state is 4
generic_interrupt: 1 0 0
** IRQ peripheral usb0001 tx0000 rx0000
<== Power=e0, DevCtl=99, int_usb=0x1
generic_interrupt: 4 0 0
** IRQ peripheral usb0004 tx0000 rx0000
<== Power=f0, DevCtl=99, int_usb=0x4
generic_interrupt: 8 0 0

-- 
Paul Kocialkowski, Replicant developer

Replicant is a fully free Android distribution running on several
devices, a free software mobile operating system putting the emphasis on
freedom and privacy/security.

Website: http://www.replicant.us/
Blog: http://blog.replicant.us/
Wiki/tracker/forums: http://redmine.replicant.us/

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