Hi
Joe Perches wrote:
> On Tue, 2010-07-13 at 00:20 +0200, Lars-Peter Clausen wrote:
>> This patch adds support for the mmc controller on JZ4740 SoCs.
>> +static bool jz4740_mmc_write_data(struct jz4740_mmc_host *host,
>> + struct mmc_data *data)
>> +{
>> + struct sg_mapping_iter *miter = &host->miter;
>> + uint32_t *buf;
>> + bool timeout;
>> + size_t i, j;
>> +
>> + while (sg_miter_next(miter)) {
>> + buf = miter->addr;
>> + i = miter->length / 4;
>> + j = i / 8;
>> + i = i & 0x7;
>> + while (j) {
>> + timeout = jz4740_mmc_poll_irq(host,
>> JZ_MMC_IRQ_TXFIFO_WR_REQ);
>> + if (unlikely(timeout))
>> + goto poll_timeout;
>> +
>> + writel(buf[0], host->base + JZ_REG_MMC_TXFIFO);
>
> Perhaps it'd be better to use a temporary for
> host->base + JZ_REG_MMC_TXFIFO
Hm, indeed host->addr is reloaded before each write.
>
>> + writel(buf[1], host->base + JZ_REG_MMC_TXFIFO);
>> + writel(buf[2], host->base + JZ_REG_MMC_TXFIFO);
>> + writel(buf[3], host->base + JZ_REG_MMC_TXFIFO);
>> + writel(buf[4], host->base + JZ_REG_MMC_TXFIFO);
>> + writel(buf[5], host->base + JZ_REG_MMC_TXFIFO);
>> + writel(buf[6], host->base + JZ_REG_MMC_TXFIFO);
>> + writel(buf[7], host->base + JZ_REG_MMC_TXFIFO);
>> + buf += 8;
>> + --j;
>> + }
>> + if (unlikely(i)) {
>> + timeout = jz4740_mmc_poll_irq(host,
>> JZ_MMC_IRQ_TXFIFO_WR_REQ);
>> + if (unlikely(timeout))
>> + goto poll_timeout;
>> +
>> + while (i) {
>> + writel(*buf, host->base + JZ_REG_MMC_TXFIFO);
>> + ++buf;
>> + --i;
>> + }
>> + }
>> + data->bytes_xfered += miter->length;
>> + }
>
>
Thanks for reviewing
- Lars
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