On Mon, Feb 14, 2011 at 04:59:59PM +0000, Russell King - ARM Linux wrote:
> On Mon, Feb 14, 2011 at 10:32:20AM +0800, Shawn Guo wrote:
> > + switch (mmc_resp_type(cmd)) {
> > + case MMC_RSP_NONE:
> > + break;
> > + case MMC_RSP_R1:
> > + case MMC_RSP_R1B:
> > + case MMC_RSP_R3:
> > + cmd->resp[0] = readl(host->base + HW_SSP_SDRESP0);
> > + break;
> > + case MMC_RSP_R2:
> > + cmd->resp[3] = readl(host->base + HW_SSP_SDRESP0);
> > + cmd->resp[2] = readl(host->base + HW_SSP_SDRESP1);
> > + cmd->resp[1] = readl(host->base + HW_SSP_SDRESP2);
> > + cmd->resp[0] = readl(host->base + HW_SSP_SDRESP3);
>
> You really should be testing for MMC_RSP_PRESENT and MMC_RSP_136
> here. The response types are made up of a bitfield which allows
> you to detect what's required rather than having to decode the
> response type itself.
>
Please review the update.
if (mmc_resp_type(cmd) & MMC_RSP_PRESENT) {
if (mmc_resp_type(cmd) & MMC_RSP_136) {
cmd->resp[3] = readl(host->base + HW_SSP_SDRESP0);
cmd->resp[2] = readl(host->base + HW_SSP_SDRESP1);
cmd->resp[1] = readl(host->base + HW_SSP_SDRESP2);
cmd->resp[0] = readl(host->base + HW_SSP_SDRESP3);
} else {
cmd->resp[0] = readl(host->base + HW_SSP_SDRESP0);
}
}
> > + else if (stat & BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ)
> > + data->error = -ENODATA;
> > + else if (stat & BM_SSP_CTRL1_FIFO_OVERRUN_IRQ)
> > + data->error = -EOVERFLOW;
>
> Both of these have a common error code - -EIO.
>
OK. Thanks for teaching.
Regards,
Shawn
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