Hi Bin, On Monday 03 July 2017 06:49 PM, Bin Meng wrote: > Hi Vignesh, > > On Thu, Jun 29, 2017 at 2:41 PM, Vignesh R <vigne...@ti.com> wrote: >> Hi Stefan, >> >> On Thursday 29 June 2017 11:15 AM, Stefan Roese wrote: >>> Hi, >>> >>> as you might have noticed, Bin Meng is currently greatly improving >>> the U-Boot xHCI support. While doing this, he noticed that some >>> additions are more complex and especially ugly to add, since some >>> users of the xHCI support have not enabled CONFIG_DM_USB. This >>> adds ugly #ifdef's, which we really would like to avoid. Because >>> of this we checked, which boards exactly are using xHCI without >>> DM_USB enabled. Here a complete list of all the boards: >>> >>> ls1012ardb_qspi_SECURE_BOOT >>> ls1021atwr_nor_SECURE_BOOT >>> am43xx_hs_evm >>> am57xx_hs_evm >>> ls1021aqds_nand >>> ls1021atwr_nor >>> ls1021atwr_qspi >>> cm_t43 >>> ls1021atwr_nor_lpuart >>> ls1021aqds_sdcard_qspi >>> k2hk_hs_evm >>> am43xx_evm >>> ls1021aqds_qspi >>> am57xx_evm_nodt >>> k2g_hs_evm >>> ls1021atwr_sdcard_qspi >>> am43xx_evm_ethboot >>> ls1021aqds_sdcard_ifc >>> k2l_evm >>> am43xx_evm_usbhost_boot >>> am43xx_evm_qspiboot >>> k2g_evm >>> am57xx_evm >>> ls1021atwr_sdcard_ifc >>> cl-som-am57x >>> k2hk_evm >>> k2e_evm >>> ls1021atwr_sdcard_ifc_SECURE_BOOT >>> ls1021aqds_nor_SECURE_BOOT >>> k2e_hs_evm >> >> For TI platforms, there is some work needed to convert xhci-dwc3, >> xhci-omap and xhci-keystone to DM (under drivers/usb/host) >> >> But the bigger concern of enabling DM_USB is with gadget framework, >> which is not DM compliant yet. There is a significant amount work[1][2] >> there before dwc3 gadget can be moved to DM and we can enable DM_USB. >> >> [1]https://lists.denx.de/pipermail/u-boot/2017-June/296081.html >> [2]https://lists.denx.de/pipermail/u-boot/2017-June/295370.html > > I thought gadget and host support are separate, so host support like > xHCI can be moved to DM without affecting gadget support, no? Are they > sharing some codes? >
Right now, the assumption is if DM_USB is enabled, then both host and gadget frameworks use DM along with DT. If, DM_USB is enabled, then board specific registration of gadget drivers don't happen. Also, I see couple of gadget drivers like ether.c. ci_udc.c (and everything under musb_new) seem use DM_USB already, making it hard for DM based host and non DM gadget to exist. Some work would be needed to remove dependency b/w DM_USB and gadget support. -- Regards Vignesh _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
