In message: <48DEA8E7.2080503_at_FreeBSD.org> Alexander Motin <mav_at_FreeBSD.org> writes: : Hi. : : I would like to present initial revision of my generic PCI SD Host : Controller driver (sdhci). It support PCI devices with class 8 and : subclass 5 according to SD Host Controller Specification. With some : limitations it successfully works on my Acer TM6292 notebook with ENE : CB714 card reader. : : Things that are working now: : - PIO mode single and multiple block read and write, : - 1 and 4 bits bus width support. : : In PIO mode with 4GB SD card on 30MHz 4bit bus I have reached about : 3.5MB/s (limited by CPU) linear read and 7MB/s (limited by card) linear : write. Small blocks read/write performance limited by card. : : Things that are not working yet: : - DMA modes (code is written, but as my controller looks like has : broken DMA I have no ability to debug it), : - card insert/remove detection (need more thinking), you should reload : mmc module to rescan cards, : - SDHC and MMC cards (have no such cards now to debug that code), only : standard capacity SD Memory cards up to 4GB size are supported now, : - high speed (double rate) bus mode (need more thinking and DMA support). : : Also to get such results I have improved existing mmc and mmcsd drivers : a bit. mmc driver got: : - 4 bit bus width support, : - write protection switch support, : - cards with more then 2GB capacity support. : mmcsd driver got: : - multiple block read and write support, : - cards with more then 2GB capacity support, : - I/O error reporting, : - write protection switch support. : : Latest patches against 8-CURRENT (should also fit 7-STABLE) may be found at: : http://people.freebsd.org/~mav/sdhci/ : : I will be grateful for any feedbacks, comments and support. I'll take a look at the driver and post a code review... WarnerReceived on Sun Sep 28 2008 - 07:30:45 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:39:35 UTC