Hi Everyone, Has anybody noticed such issues? Or is there something wrong with my protocol driver... any pointers will be really helpful.
Regards, Tom On Fri, May 27, 2011 at 8:22 PM, Tom <[email protected]> wrote: > The MRST dw_spi in Transmit & receive mode running on kernel 2.6.35, > stepping A3, is unable to receive data properly. > The slave is sending the data as expected, but the spi controller is not > reading it properly. > > If i insert the messages or the delay equivalent as shown below it works. > Any clue ? > > static int u8_writer(struct dw_spi *dws) > { > if (!(dw_readw(dws, sr) & SR_TF_NOT_FULL) > || (dws->tx == dws->tx_end)) > return 0; > > dw_writew(dws, dr, *(u8 *)(dws->tx)); > // printk("dw write %x ",*(u8 *)(dws->tx)); > udelay(50); > ++dws->tx; > > wait_till_not_busy(dws); > return 1; > } > > static int u8_reader(struct dw_spi *dws) > {//printk("dw spi %s ",__func__); > while ((dw_readw(dws, sr) & SR_RF_NOT_EMPT) > && (dws->rx < dws->rx_end)) { > *(u8 *)(dws->rx) = dw_readw(dws, dr); > // printk("dw read %x ",*(u8 *)(dws->rx)); > udelay(50); > ++dws->rx; > } > > wait_till_not_busy(dws); > return dws->rx == dws->rx_end; > } > ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
