omap3 usb platform and other

Sartakov A. Vasily sartakov at ksyslabs.org
Fri Nov 25 17:58:38 CET 2011


Hello
Can you tell me please where i can read about  DMA and IOMMU
realisation in Fiasco/l4?

2011/11/23 Sartakov A. Vasily <sartakov at ksyslabs.org>:
> 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/
>>>
>>> _______________________________________________
>>> l4-hackers mailing list
>>> l4-hackers at os.inf.tu-dresden.de
>>> http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
>>>
>>
>>
>>
>> --
>> Sartakov A. Vasily
>>
>
>
>
> --
> Sartakov A. Vasily
>



-- 
Sartakov A. Vasily




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