mmc: Allow host drivers to specify max block count

[powerpc.git] / drivers / mmc / wbsd.c

diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
index ced309b..cf16e44 100644 (file)
--- a/drivers/mmc/wbsd.c
+++ b/drivers/mmc/wbsd.c
@@ -1021,7 +1021,7 @@ static int wbsd_get_ro(struct mmc_host *mmc)
        return csr & WBSD_WRPT;
 }
 
-static struct mmc_host_ops wbsd_ops = {
+static const struct mmc_host_ops wbsd_ops = {
        .request        = wbsd_request,
        .set_ios        = wbsd_set_ios,
        .get_ro         = wbsd_get_ro,
@@ -1343,16 +1343,27 @@ static int __devinit wbsd_alloc_mmc(struct device *dev)
        mmc->max_phys_segs = 128;
 
        /*
-        * Maximum number of sectors in one transfer. Also limited by 64kB
-        * buffer.
+        * Maximum request size. Also limited by 64KiB buffer.
         */
-       mmc->max_sectors = 128;
+       mmc->max_req_size = 65536;
 
        /*
         * Maximum segment size. Could be one segment with the maximum number
-        * of segments.
+        * of bytes.
         */
-       mmc->max_seg_size = mmc->max_sectors * 512;
+       mmc->max_seg_size = mmc->max_req_size;
+
+       /*
+        * Maximum block size. We have 12 bits (= 4095) but have to subtract
+        * space for CRC. So the maximum is 4095 - 4*2 = 4087.
+        */
+       mmc->max_blk_size = 4087;
+
+       /*
+        * Maximum block count. There is no real limit so the maximum
+        * request size will be the only restriction.
+        */
+       mmc->max_blk_count = mmc->max_req_size;
 
        dev_set_drvdata(dev, mmc);
 
@@ -1488,7 +1499,7 @@ static void __devinit wbsd_request_dma(struct wbsd_host *host, int dma)
        /*
         * Translate the address to a physical address.
         */
-       host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer,
+       host->dma_addr = dma_map_single(mmc_dev(host->mmc), host->dma_buffer,
                WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
 
        /*
@@ -1512,7 +1523,7 @@ kfree:
         */
        BUG_ON(1);
 
-       dma_unmap_single(host->mmc->dev, host->dma_addr,
+       dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
                WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
        host->dma_addr = (dma_addr_t)NULL;
 
@@ -1530,7 +1541,7 @@ err:
 static void __devexit wbsd_release_dma(struct wbsd_host *host)
 {
        if (host->dma_addr) {
-               dma_unmap_single(host->mmc->dev, host->dma_addr,
+               dma_unmap_single(mmc_dev(host->mmc), host->dma_addr,
                        WBSD_DMA_SIZE, DMA_BIDIRECTIONAL);
        }
        kfree(host->dma_buffer);