On Tue, Jul 1, 2025 at 8:42 PM Alice Guo (OSS) <alice....@oss.nxp.com> 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 <thar...@gateworks.com> > > 发送时间: 2025年7月2日 3:50 > > 收件人: Alice Guo (OSS) <alice....@oss.nxp.com> > > 抄送: u-boot <u-boot@lists.denx.de>; Fabio Estevam <feste...@gmail.com> > > 主题: Re: imx95 SDP support? > > > > On Tue, Jul 1, 2025 at 6:07 AM Alice Guo (OSS) <alice....@oss.nxp.com> > > 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 <thar...@gateworks.com> > > > > 发送时间: 2025年7月1日 8:07 > > > > 收件人: u-boot <u-boot@lists.denx.de>; Alice Guo (OSS) > > > > <alice....@oss.nxp.com>; Fabio Estevam <feste...@gmail.com> > > > > 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