On 05/23/14 05:53, srinivas.kandagatla@xxxxxxxxxx wrote:
> @@ -1022,6 +1025,40 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
> }
> }
>
> +static int mmci_qcom_pio_read(struct mmci_host *host, char *buffer,
> + unsigned int remain)
> +{
> + u32 *ptr = (u32 *) buffer;
> + unsigned int count = 0;
> + unsigned int words, bytes;
> + unsigned int fsize = host->variant->fifosize;
> +
> + words = remain >> 2;
> + bytes = remain % 4;
> + /* read full words followed by leftover bytes */
> + if (words) {
> + while (readl(host->base + MMCISTATUS) & MCI_RXDATAAVLBL) {
> + *ptr = readl(host->base + MMCIFIFO + (count % fsize));
This doesn't look endianness agnostic. Shouldn't we use ioread32_rep()
to read this fifo?
> + ptr++;
> + count += 4;
> + words--;
> + if (!words)
> + break;
> + }
> + }
> +
> + if (unlikely(bytes)) {
> + unsigned char buf[4];
> + if (readl(host->base + MMCISTATUS) & MCI_RXDATAAVLBL) {
> + *buf = readl(host->base + MMCIFIFO + (count % fsize));
> + memcpy(ptr, buf, bytes);
> + count += bytes;
> + }
> + }
> +
> + return count;
> +}
> +
> static int mmci_pio_read(struct mmci_host *host, char *buffer, unsigned int remain)
> {
> void __iomem *base = host->base;
>
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