omap3 usb platform and other

Sartakov A. Vasily sartakov at ksyslabs.org
Wed Nov 23 12:30:08 CET 2011


Hi folks
I am looked into sd/mmc card driver, which use only dma, and it
doesn't work. i have a problem with omap_request_dma (plat-omap):
before call omap_request_dma i should make init platform's dma, and i
don't think what its good idea.


2011/11/18 Sartakov A. Vasily <sartakov at ksyslabs.org>:
> Thanks, its right
> Anyway, ehci doesn't work. usb driver hasn't any changes, and i think
> problem somewhere in dma. for example - when i use musb host with dma
> it not works, i have a messages like
> reset high speed USB device number 3 using musb-hdrc
> reset high speed USB device number 3 using musb-hdrc
> scsi 0:0:0:0: Device offlined - not ready after error recovery
> and i cant mount or get device via udevd. when i use it in pio mode -
> all ok. unfortunately ehci hasnt pio mode, so, i should find solution
> with dma.
>
> boot log for ehci:
> 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 2
> ------ here call dmapool and it done ok ---------
> ehci-omap ehci-omap.0: irq 77, io mem 0x48064800
> ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00
> 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: OMAP-EHCI Host Controller
> usb usb2: Manufacturer: Linux 3.0.0-l4-svn23 ehci_hcd
> usb usb2: SerialNumber: ehci-omap.0
> hub 2-0:1.0: USB hub found
> hub 2-0:1.0: 3 ports detected
> usbcore: registered new interface driver uas
> Initializing USB Mass Storage driver...
>
> vanila linux:
> ehci-omap ehci-omap.0: reset hcs_params 0x1313 dbg=0 cc=1 pcc=3 ordered ports=3
> ehci-omap ehci-omap.0: reset hcc_params 0016 thresh 1 uframes 256/512/1024 park
> ehci-omap ehci-omap.0: OMAP-EHCI Host Controller
> drivers/usb/core/inode.c: creating file '002'
> ehci-omap ehci-omap.0: new USB bus registered, assigned bus number 2
> ehci-omap ehci-omap.0: park 0
> ehci-omap ehci-omap.0: irq 77, io mem 0x48064800
> ehci-omap ehci-omap.0: reset command 0080b02  park=3 ithresh=8
> period=1024 Reset HALT
> ehci-omap ehci-omap.0: init command 0010005 (park)=0 ithresh=1 period=512 RUN
> ehci-omap ehci-omap.0: USB 2.0 started, EHCI 1.00
> usb usb2: default language 0x0409
> usb usb2: udev 1, busnum 2, minor = 128
> 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: OMAP-EHCI Host Controller
> usb usb2: Manufacturer: Linux 2.6.39 ehci_hcd
> usb usb2: SerialNumber: ehci-omap.0
> usb usb2: usb_probe_device
> usb usb2: configuration #1 chosen from 1 choice
> usb usb2: adding 2-0:1.0 (config #1, interface 0)
> hub 2-0:1.0: usb_probe_interface
> hub 2-0:1.0: usb_probe_interface - got id
> hub 2-0:1.0: USB hub found
> hub 2-0:1.0: 3 ports detected
> hub 2-0:1.0: standalone hub
> hub 2-0:1.0: individual port power switching
> hub 2-0:1.0: individual port over-current protection
> hub 2-0:1.0: power on to power good time: 20ms
> hub 2-0:1.0: local power source is good
> hub 2-0:1.0: enabling power on all ports
>
>
> 2011/11/18 Adam Lackorzynski <adam at os.inf.tu-dresden.de>:
>>
>> On Thu Nov 17, 2011 at 12:49:31 +0400, Sartakov A. Vasily wrote:
>>> So..
>>> usb host via ehci uses dma and i have problem in pool_alloc_page(mm/dmapool.c):
>>> dma_alloc_coherent (arhc/l4/mm/) returns 0, cos l4x_dma_mem_alloc
>>> returns 0 too.
>>
>> I guess you need to put some 'dmamem' onto your vbus:
>>
>>  DMAMEM => new Device()
>>  {
>>    .hid = "dmamem";
>>    new-res Mmio_ram(<size-in-bytes>, 0);
>>  }
>>
>>
>>
>> Adam
>> --
>> Adam                 adam at os.inf.tu-dresden.de
>>  Lackorzynski         http://os.inf.tu-dresden.de/~adam/
>>
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>>
>
>
>
> --
> Sartakov A. Vasily
>



-- 
Sartakov A. Vasily




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