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Kernel source tree for Raspberry Pi-provided kernel builds. Issues unrelated to the linux kernel should be posted on the community forum at https://forums.raspberrypi.com/
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DWC_OTG code fails during write opration #115

Closed anviksingh closed 12 years ago

anviksingh commented 12 years ago

Hi, I am using synopsys dwc_otg core in our SoC (IP version 2.92a). I have downloaded the code (dwc_otg 2.94a) from the dwc_otg in raspberry main line (raspberrypi-linux-78f82bc\drivers\usb\host).

I have configured the core as host and I am using HSIC mode of operation. Enumeration happens properly with following Device settings: 1) Internal DMA mode ON. 2) HSIC mode of operation ON. 3) Non-SG mode of operation ON.

Queries: 1) When data read is called from the device node /dev/sda, 0x55AA55AA is read as 0x66996699 when I print the data dump. 2) Data write fails when the data size is >= 4096 and device resets.

Could some one please suggest where should I look to make the data transfer correct ? Do you think this is related to platform settings (clock settings, external fifo etc.) ?

~ Anvik

popcornmix commented 12 years ago

Sorry nothing immediately springs to mind, and I can't help with dwc_otg on other platforms. We have enough USB problems to deal with on Raspberry Pi without supporting other platforms.