Mike Rapoport wrote: > > I've started to apply the patches one by one and after the first patch > is applied, the SD card works Ok, but libertas fails to initialize with > the following messages: > >> modprobe libertas_sdio > [ 82.233489] lib80211: common routines for IEEE802.11 drivers > [ 82.833251] cfg80211: Calling CRDA to update world regulatory domain > [ 83.327911] libertas_sdio: Libertas SDIO driver > [ 83.332489] libertas_sdio: Copyright Pierre Ossman > [ 83.348510] libertas_sdio mmc1:0001:1: firmware: requesting > sd8686_helper.bin > [ 83.497619] libertas_sdio mmc1:0001:1: firmware: requesting sd8686.bin > [ 83.679229] DMA synchronization event drop occurred with device 47
What block size are you using? It looks like you're using something less than 512. I've checked the spec again and the DMA packet size should be the block size in words (and not the FIFO depth). Also, keep in mind that the buffers for transfers must begin and end on a word boundary. The OMAP's DMA controller can only transfer whole words to the MMC FIFO. David -- David Vrabel, Senior Software Engineer, Drivers CSR, Churchill House, Cambridge Business Park, Tel: +44 (0)1223 692562 Cowley Road, Cambridge, CB4 0WZ http://www.csr.com/ Member of the CSR plc group of companies. CSR plc registered in England and Wales, registered number 4187346, registered office Churchill House, Cambridge Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
