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Based on discussion from this thread [1]. Adding omap-view port that helps us in using the generic ulpi framework for any ulpi phy ops using the INSNREG05_ULPI viewport reg available on omap platform. Currently ehci ports are available on omap3/4 platforms so enable the same for beagle and panda, patch is tested on the same boards. Thanks to Igor Grinberg <grinberg@compulab.co.il> for reviewing the omap-ehci patches and suggesting this approach. [1]: http://www.mail-archive.com/u-boot@lists.denx.de/msg76076.html Tested-by: Stefano Babic <sbabic@denx.de> Acked-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
28 lines
899 B
Plaintext
28 lines
899 B
Plaintext
Reference code ""drivers/usb/ulpi/omap-ulpi-viewport.c"
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Contains the ulpi read write api's to perform
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any ulpi phy port access on omap platform.
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On omap ehci reg map contains INSNREG05_ULPI
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register which offers the ulpi phy access so
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any ulpi phy commands should be passsed using this
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register.
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omap-ulpi-viewport.c is a low level function
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implementation of "drivers/usb/ulpi/ulpi.c"
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To enable and use omap-ulpi-viewport.c
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we require CONFIG_USB_ULPI_VIEWPORT_OMAP and
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CONFIG_USB_ULPI be enabled in config file.
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Any ulpi ops request can be done with ulpi.c
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and soc specific binding and usage is done with
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omap-ulpi-viewport implementation.
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Ex: scenario:
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omap-ehci driver code requests for ulpi phy reset if
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ehci is used in phy mode, which will call ulpi phy reset
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the ulpi phy reset does ulpi_read/write from viewport
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implementation which will do ulpi reset using the
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INSNREG05_ULPI register.
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