-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, I am working on a custom MPC5121e board, adapting 2.6.24 kernel. The board has two USB ports: - - cell-index 0 uses internal phy - - cell-index 1 uses external phy
For mechanical/commercial reasons I cannot use Mini-A / Mini-B connectors, so I have two "host" connectors, but the board should be capable of doing host or device by dip-switch selection and using an external M/M connector adapter. First I enabled cell-index 0 only in dts file, dr_mode = "otg", used OTG kernel modules ; I succeeded in switching from host to device mode : port 0 is working. Cell-index 1: disabled cell 0 and wrote some tweaks in drivers to enable correct USB clocks (I saw some recent patches about this), then realized that the hardware people have chosen a wrong ULPI phy (CY7C68003), which is capable of doing only device, not host (arrrggghh !!) ; next boards will have a different phy (capable of OTG). I have some preliminary boards with this Cypress phy and tried enabling this cell in otg mode to try and see if I can work in device mode, but strange things - - ehci_hub_control complains. I suppose the phy is not ok to work this way. Now I am trying to arrive to something like: cell-0 : dr_mode = otg cell-1 : dr_mode = peripheral This way I could save the preliminary boards, with cell-1 working only as a usb device. I am having problems with processor reset in inserting modules, still not clear what is happening. Anyway, final target will be (new boards): cell-0 : dr_mode = otg cell-1 : dr_mode = otg Each port will have its dip-switch to select host or device mode. So, here we are: - - anyone having some suggestions or link to documentation please ? - - is it possible to have two ports working as "peripheral" ? Not necessary for me, but just to understand the "linux" constraints (if any). I could, for example, use file_storage to one USB cell and ethernet-dev to the other... I also have to investigate how to tell file_storage which USB cell to use : map both USB cells to the same pseudo-disk seems not good. Thanks, best regards Lucio Dona' -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iD8DBQFLoN+FvxHCsvXy9okRAtvfAJ4pEaBgPfmKLVRgczx3C1yYlQ8QdwCfYoyO 0KCTXBxZrALLHG/7BziuZpA= =W1D6 -----END PGP SIGNATURE----- _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
