Hello Felipe,
I try to bring up usb 2.0 support on an am1808 based
board and Linux version 3.1.0-rc10 and I am facing
some issues:
- in arch/arm/mach-davinci/usb.c in
static struct musb_hdrc_platform_data usb_data
".mode" var get only initialized if some of the
CONFIG_USB_MUSB_* config options are set, but your
commit 622859634a663c5e55d0e2a2cdbb55ac058d97b3
Author: Felipe Balbi <balbi@xxxxxx>
Date: Wed Jun 22 17:28:09 2011 +0300
usb: musb: drop a gigantic amount of ifdeferry
dropped a lot of ifdefs, also the USB_MUSB_HOST,
USB_MUSB_PERIPHERAL and USB_MUSB_OTG defines, which
are used in arch/arm/mach-davinci/usb.c!
So I think, this ".mode" var is used uninitialized,
or miss I something?
I made a patch, which sets this var to MUSB_OTG
which should be the right value ... should I post
it? (BTW: in arch/arm/mach-davinci/board-da830-evm.c
is also an CONFIG_USB_MUSB_HOST define, which
should be cleaned up)
- If I set ".mode = MUSB_OTG" and set in the syscfg2
soc register ~CFGCHIP2_OTGMODE a memstick is not
detected. But if I add in drivers/usb/musb/da8xx.c
da8xx_musb_interrupt() a 10ms delay befor the
"if (status & (DA8XX_INTR_DRVVBUS << DA8XX_INTR_USB_SHIFT)) {"
line usb works fine!
It also works without this timeout if I change the
"dev_dbg(musb->controller, "USB IRQ %08x\n", status);"
to
"printk(musb->controller, "USB IRQ %08x\n", status);"
-> some timing issue, but I have no idea why!
(Maybe you have an idea?)
- We use on the board host only mode, so i tried the
following:
set syscfg2 |= CFGCHIP2_FORCE_HOST in board code,
and in arch/arm/mach-davinci/usb.c
static struct musb_hdrc_platform_data usb_data = {
- .mode = MUSB_OTG,
+ .mode = MUSB_HOST,
-> USB works (without the above timeout) fine!
Do you have any idea?
I think, the issue with the CONFIG_USB_MUSB_* and
the not setup var ".mode" in musb_hdrc_platform_data
must be fixed ... and I think MUSB_OTG should be the right
value ... or?
thanks in advance
bye,
Heiko
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