On Thu, Jul 3, 2025 at 4:24 AM Alice Guo (OSS) <[email protected]> wrote: > > Hi Tim, > > I do not know the reason for the problems you met and will try to enable > imx95 SDP recently. USB 2.0 can also be used. >
Hi Alice, I eventually got SDP working on i.MX95 USB3 DWC3. It turns out I did need to put the TCA block into system configuration mode otherwise the USB PHY would not link which was my issue. I'll submit a patch that enables initial i.MX95 support for phy-imx8mq-usb.c next week. It at least gets the USB3 controller working in device mode, but host mode will present difficulties as we will need a way to communicate with a TCPM to configure the XBar for a Type-C connector orientation. Additionally for the imx95-evk we would need a PTN5110P driver to be able to enable VBUS and determine the Type-C plug orientation. I was also able to verify i.MX95 USB2 EHCI in host mode as well as gadget mode (by setting its dr_mode to peripheral and adding support for role determination which I sent a patch for) and everything worked fine there yet when booting over SDP I still am hanging after the ATF BL31 prints after loading U-Boot proper via SDP for some reason. Best Regards, Tim > Best Regards, > Alice Guo > > > -----邮件原件----- > > 发件人: Tim Harvey <[email protected]> > > 发送时间: 2025年7月3日 9:16 > > 收件人: Alice Guo (OSS) <[email protected]> > > 抄送: u-boot <[email protected]>; Fabio Estevam <[email protected]> > > 主题: Re: imx95 SDP support? > > > > On Tue, Jul 1, 2025 at 8:42 PM Alice Guo (OSS) <[email protected]> > > wrote: > > > > > > Hi Tim, > > > > > > i.MX95 BOOTROM is on M33 so that cannot call boot ROM API. > > > > > > > Hi Alice, > > > > This makes sense - I forgot that the BOOTROM for the imx95 is on the M33. > > > > > The difference between imx8mm BOOTROM and imx8mp/mn BOOTROMv2 is > > that > > > BOOTROMv2 can call ROM API to load and imx8mm BOOTROM has no such > > > function. No need to add USB support to imx8mp and imx8mn SPL. > > > > > > When you add USB support to i.MX95 SPL, have you increased the size of > > > i.MX95 SPL? i.MX95 SDP uses USB3 which driver is in drivers/usb/dwc3/. > > > Configure USB to gadget. The USB phy driver uses > > > drivers/phy/phy-imx8mq-usb.c. i.MX95 has tca mux so that it is needed to > > > add > > code in the USB phy driver. > > > > When I add USB, SPL_USB_GADGET, and SPL_USB_DWC3_GENERIC the build > > fails: > > aarch64-linux-ld.bfd: u-boot-spl section `.data_save' will not fit in > > region `.sram' > > aarch64-linux-ld.bfd: region `.sram' overflowed by 8936 bytes > > make[2]: *** [scripts/Makefile.xpl:542: spl/u-boot-spl] Error 1 > > make[1]: *** [/home/tharvey/catalina/uboot/Makefile:2127: > > spl/u-boot-spl] Error 2 > > make: *** [Makefile:186: sub-make] Error 2 > > > > There's no default SPL_SIZE_LIMIT set so the size here would be a linker > > config > > somewhere. > > > > I can disable MMC support to shrink things down enough however. > > > > I see the TCA configuration you are referring to in Linux [1] but that's > > all about > > USB 3.0 pairs and SDP just requires USB 2.0 so I doubt that's needed. > > Regardless > > I've attempted to implement it in case that's an issue. > > > > If allow PHY_IMX8MQ_USB to be built for IMX95 I can get to the following > > with > > some debugging added: > > Normal Boot > > spl_boot_device > > get_boot_device > > get_boot_device boot_type=14 boot_instance=3 get_boot_device > > BT_DEV_TYPE_USB boot_dev=17 spl_board_boot_device 17 > > spl_board_boot_device USB_BOOT (usb3.0: J8 Type-C USB) Trying to boot from > > USB SDP dwc3_glue_probe usb@4c010010 dwc3_generic_peripheral_probe > > usb@4c100000 dwc3_generic_probe usb@4c100000 imx8mq_usb_phy_probe > > phy@4c1f0040 tca_blk_init 0x4c1fc000 spl_sdp_load_image calling > > board_usb_init spl_sdp_load_image calling g_dnl_clear_detach > > spl_sdp_load_image calling g_dnl_register > > sdp_add: cdev: 93203dd0 gadget: 932002b0 gadget->ep0: 93200dc0 > > spl_sdp_load_image calling sdp_init > > SDP: initialize... > > dwc3_gadget_interrupt link change > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > dwc3_gadget_interrupt erratic error > > ^^^ it spins here without ever getting out of the init phase > > > > Any idea what might be missing here? > > > > For the board I'm working on I really want to get SDP working on the > > USB2 interface which on the imx95-19x19-evk routes to the Type-A connector > > so > > I've done the following: > > - add usb2 nodes to imx95.dtsi and imx95-19x19-evk.dtsi > > - add imx95 support to ehci-mx6 ehci_usb_phy_mode() (I'm assuming the > > USBNC_PHY_STATUS register is the same as the IMX8MM although its missing > > from the IMX95 RM) > > - enable SPL_USB_GADGET, SPL_USB_SDP_SUPPORT, USB_EHCI_MX7, CI_UDC, > > SPL_NOP_PHY, SDP_LOADADDR > > - work around the fact that get_boot_device returns QSPI_BOOT when booted > > from the USB2 > > > > This gets me a bit further than the USB3 controller path: > > Normal Boot > > spl_boot_device > > get_boot_device > > get_boot_device boot_type=14 boot_instance=1 get_boot_device > > BT_DEV_TYPE_USB boot_dev=15 spl_board_boot_device 15 > > spl_board_boot_device (usb2.0: J7 Type-A USB) Trying to boot from USB SDP > > udc_device_get_by_index index=0 drivers/usb/gadget/ci_udc.c > > usb_gadget_register_driver ehci_usb_of_to_plat usb@4c200000 > > ehci_usb_probe usb@4c200000 ehci_usb_probe usb@4c200000 ret=0 > > usb_gadget_register_driver usb_setup_ehci_gadget ret=0 > > sdp_add: cdev: 93200790 gadget: 2049b928 gadget->ep0: 2049b9c8 > > SDP: initialize... > > sdp_set_alt: intf: 0 alt: 0 > > sdp_start_ep: ep:2049ba30 req:93200ad0 > > sdp_start_ep: ep:2049ba98 req:93200bd0 > > w_value: 0x0000 len: 0x0000 > > req_type: 0x20 ctrl->bRequest: 0x0a sdp->state: 0 > > w_value: 0x2200 len: 0x004c > > req_type: 0x00 ctrl->bRequest: 0x06 sdp->state: 0 sdp_init complete > > SDP: handle requests... > > ^^^ at this point SPL SDP enumerates on the host and I use 'uuu flash.bin' > > again > > to load U-Boot proper > > sdp_rx_command_complete: command: 0404, addr: 00000000, cnt: 931840 > > Downloading file of size 931840 to 0x90400000... done Report 3: HAB security > > ep1in-bulk complete --> 0, 5/5 Report 4: Status ep1in-bulk complete --> 0, > > 65/65 > > sdp_rx_command_complete: command: 0b0b, addr: 00000000, cnt: 0 Report 3: > > HAB security ep1in-bulk complete --> 0, 5/5 Jumping to header at 0x90400000 > > Header Tag is not an IMX image Found header at 0x90400000 > > sdp_load_read: sector 0, count 400, buf 93202b90 > > sdp_load_read: sector 2000, count 8800, buf ff000000 > > sdp_load_read: sector a800, count d9000, buf 90200000 > > NOTICE: BL31: v2.10.0 (release):lf-6.6.52-2.2.0 > > NOTICE: BL31: Built : 16:06:15, Dec 27 2024 ^^^ hangs here at the end of > > the > > ATF > > > > Any ideas what this one could be? > > > > Best Regards, > > > > Tim > > > > > > > > Best Regards, > > > Alice Guo > > > > > > > -----邮件原件----- > > > > 发件人: Tim Harvey <[email protected]> > > > > 发送时间: 2025年7月2日 3:50 > > > > 收件人: Alice Guo (OSS) <[email protected]> > > > > 抄送: u-boot <[email protected]>; Fabio Estevam > > > > <[email protected]> > > > > 主题: Re: imx95 SDP support? > > > > > > > > On Tue, Jul 1, 2025 at 6:07 AM Alice Guo (OSS) <[email protected]> > > wrote: > > > > > > > > > > Hi Tim, > > > > > > > > > > i.MX95 needs to enable USB gadget in SPL to load the U-Boot > > > > > proper. It cannot > > > > use boot ROM API. > > > > > > > > > > > > > Hi Alice, > > > > > > > > This is unfortunate - is the ROM API not going to be usable for the > > > > imx95 or is support code simply not written yet? I don't really > > > > understand the difference for example between the imx8mm BOOTROM > > and > > > > the imx8mp/mn > > > > BOOTROMv2 where BOOTROMv2 can use the for SDP which greatly reduces > > > > the SPL footprint. > > > > > > > > Have you been able to configure U-Boot SPL for imx95 SDP? I am > > > > overflowing .sram codespace when I try to add 'either' support for > > > > the > > > > USB2.0 controller or the USB3.0 controller. > > > > > > > > Best Regards, > > > > > > > > Tim > > > > > > > > > > > > > Best Regards, > > > > > Alice Guo > > > > > > > > > > > -----邮件原件----- > > > > > > 发件人: Tim Harvey <[email protected]> > > > > > > 发送时间: 2025年7月1日 8:07 > > > > > > 收件人: u-boot <[email protected]>; Alice Guo (OSS) > > > > > > <[email protected]>; Fabio Estevam <[email protected]> > > > > > > 主题: imx95 SDP support? > > > > > > > > > > > > Hi Alice, > > > > > > > > > > > > I'm wondering if you have any notes regarding U-Boot SPL SDP > > > > > > support for the imx95? > > > > > > > > > > > > The SPL boots over SDP just fine but I'm interested in getting > > > > > > to the next step where the SPL provides SDP support to load U-Boot > > propper. > > > > > > I'm not clear if the imx95 uses a similar bootrom to as the imx8 > > > > > > and > > > > > > imx93 or if this is done over scmi. > > > > > > > > > > > > Best Regards, > > > > > > > > > > > > Tim
