[U-Boot] How to enable USB Mass Storage

[Lukasz Majewski <lukma@denx.de>]

Hi Frank,

> Hello,
> 
> I want to use the ums command to access the SD card of a
> A20-OlinuxIno-Lime board via usb-org cable. For that I start the CPU
> in FEL mode, download the u-boot-sunxi-with-spl.bin file by sunxi-fel
> tool. I do this FEL mode boot for preparation of an Einstein A20
> board, which has only an internal MMC. I run on uboot serial console:
> 

First of all - I do not have any experience with Allwiner...

> => ums 0 mmc 0                   
> UMS: LUN 0, dev 0, hwpart 0, sector 0x0, count 0x1dc000            
> Controller uninitialized         
> g_dnl_register: failed!, error: -6                                 
> g_dnl_register failed

Could you paste output of the console after defining #define DEBUG on
top of drivers/usb/gadget/g_dnl.c ?

It seems like your musb UDC is not initialized in your board
(CONFIG_USB_MUSB_GADGET=y).

Please check if you call it at your board file.

> 
> 
> It seems that the drivers/usb/musb-new/sunxi.c is not initialized.
> The devicetree has a node that should match:
> 
> 		usb at 01c13000 {
> 			compatible = "allwinner,sun4i-a10-musb";
> 			reg = <0x1c13000 0x400>;
> 			clocks = <0x2 0x0>;
> 			interrupts = <0x0 0x26 0x4>;
> 			interrupt-names = "mc";
> 			phys = <0x2b 0x0>;
> 			phy-names = "usb";
> 			extcon = <0x2b 0x0>;
> 			allwinner,sram = <0x2c 0x1>;
> 			status = "okay";
> 			dr_mode = "otg";
> 		};
> 
> 
> My config is:
> 
> cat defconfig 
> CONFIG_ARM=y
> CONFIG_ARCH_SUNXI=y
> CONFIG_MACH_SUN7I=y
> CONFIG_DRAM_CLK=384
> CONFIG_MMC0_CD_PIN="PH1"
> CONFIG_I2C1_ENABLE=y
> CONFIG_SATAPWR="PC3"
> CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-olinuxino-lime"
> CONFIG_AHCI=y
> # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
> CONFIG_SPL=y
> CONFIG_SPL_I2C_SUPPORT=y
> # CONFIG_FASTBOOT is not set
> # CONFIG_CMD_FLASH is not set
> # CONFIG_CMD_FPGA is not set
> CONFIG_CMD_USB_MASS_STORAGE=y
> # CONFIG_SPL_DOS_PARTITION is not set
> # CONFIG_SPL_ISO_PARTITION is not set
> # CONFIG_SPL_EFI_PARTITION is not set
> CONFIG_ETH_DESIGNWARE=y
> CONFIG_SUN7I_GMAC=y
> CONFIG_AXP_ALDO3_VOLT=2800
> CONFIG_AXP_ALDO4_VOLT=2800
> CONFIG_SCSI=y
> CONFIG_USB_EHCI_HCD=y
> CONFIG_USB_MUSB_GADGET=y
> CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE=y
> CONFIG_USB_GADGET_DOWNLOAD=y
> # CONFIG_USB_ETHER is not set
> 
> Is the ums working for Allwinner CPUs, or is there some further
> configuration needed that I have not figured out?
> 
> Br,
> Frank
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Best regards,

Lukasz Majewski

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