On Tue, Jan 18, 2011 at 02:25:18PM -0800, Daniel Walker wrote:
> This doesn't work yet. I tried booting with this patch, and the boot
> stops after detecting the MMC partitions. It won't actually boot off
> the MMC. Without this patch and with the page_to_dma/pfn_to_dma changes
> it does work.
>
> Not-Signed-off-by: Daniel Walker <[email protected]>
> ---
> drivers/mmc/host/msm_sdcc.c | 46 +++++++++++++++++-------------------------
> 1 files changed, 19 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/mmc/host/msm_sdcc.c b/drivers/mmc/host/msm_sdcc.c
> index 5decfd0..1f1c7cb 100644
> --- a/drivers/mmc/host/msm_sdcc.c
> +++ b/drivers/mmc/host/msm_sdcc.c
> @@ -383,14 +383,27 @@ static int msmsdcc_config_dma(struct msmsdcc_host
> *host, struct mmc_data *data)
> host->curr.user_pages = 0;
>
> box = &nc->cmd[0];
> - for (i = 0; i < host->dma.num_ents; i++) {
> - box->cmd = CMD_MODE_BOX;
It probably happens because this line got dropped (due to the random
formatting in this file, it makes it harder to read.)
>
> - /* Initialize sg dma address */
> - sg->dma_address = page_to_dma(mmc_dev(host->mmc), sg_page(sg))
> - + sg->offset;
> + /* location of command block must be 64 bit aligned */
> + BUG_ON(host->dma.cmd_busaddr & 0x07);
>
> - if (i == (host->dma.num_ents - 1))
> + nc->cmdptr = (host->dma.cmd_busaddr >> 3) | CMD_PTR_LP;
> + host->dma.hdr.cmdptr = DMOV_CMD_PTR_LIST |
> + DMOV_CMD_ADDR(host->dma.cmdptr_busaddr);
> + host->dma.hdr.complete_func = msmsdcc_dma_complete_func;
> +
> + n = dma_map_sg(mmc_dev(host->mmc), host->dma.sg,
> + host->dma.num_ents, host->dma.dir);
> + if (n == 0) {
> + printk(KERN_ERR "%s: Unable to map in all sg elements\n",
> + mmc_hostname(host->mmc));
> + host->dma.sg = NULL;
> + host->dma.num_ents = 0;
> + return -ENOMEM;
> + }
> +
> + for_each_sg(host->dma.sg, sg, n, i) {
+ box->cmd = CMD_MODE_BOX;
needs to be here.
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