mmc: tmio_mmc: allow multi-element scatter-gather lists

The driver is capable of handling multi-element sg lists in both PIO and
DMA modes. In DMA mode this also allows to use the DMA sg capability more
efficiently and almost doubles the throughput.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index e7765a89593e..4e75799291ca 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -864,10 +864,15 @@ static int __devinit tmio_mmc_probe(struct platform_device *dev)
                 goto host_free;
 
         mmc->ops = &tmio_mmc_ops;
-        mmc->caps = MMC_CAP_4_BIT_DATA;
-        mmc->caps |= pdata->capabilities;
+        mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities;
         mmc->f_max = pdata->hclk;
         mmc->f_min = mmc->f_max / 512;
+        mmc->max_segs = 32;
+        mmc->max_blk_size = 512;
+        mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
+                mmc->max_segs;
+        mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+        mmc->max_seg_size = mmc->max_req_size;
         if (pdata->ocr_mask)
                 mmc->ocr_avail = pdata->ocr_mask;
         else