aboutsummaryrefslogtreecommitdiff
path: root/drivers/mmc
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/mxcmmc.c35
1 files changed, 33 insertions, 2 deletions
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 5d528269587..d5036353bdd 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -301,6 +301,29 @@ static void mxcmci_softreset(struct mxcmci_host *host)
}
static int mxcmci_setup_dma(struct mmc_host *mmc);
+#if IS_ENABLED(CONFIG_PPC_MPC512x)
+static inline void buffer_swap32(u32 *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < ((len + 3) / 4); i++) {
+ st_le32(buf, *buf);
+ buf++;
+ }
+}
+
+static void mxcmci_swap_buffers(struct mmc_data *data)
+{
+ struct scatterlist *sg;
+ int i;
+
+ for_each_sg(data->sg, sg, data->sg_len, i)
+ buffer_swap32(sg_virt(sg), sg->length);
+}
+#else
+static inline void mxcmci_swap_buffers(struct mmc_data *data) {}
+#endif
+
static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
{
unsigned int nob = data->blocks;
@@ -336,6 +359,8 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
} else {
host->dma_dir = DMA_TO_DEVICE;
slave_dirn = DMA_MEM_TO_DEV;
+
+ mxcmci_swap_buffers(data);
}
nents = dma_map_sg(host->dma->device->dev, data->sg,
@@ -461,9 +486,11 @@ static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat)
struct mmc_data *data = host->data;
int data_error;
- if (mxcmci_use_dma(host))
+ if (mxcmci_use_dma(host)) {
dma_unmap_sg(host->dma->device->dev, data->sg, data->sg_len,
host->dma_dir);
+ mxcmci_swap_buffers(data);
+ }
if (stat & STATUS_ERR_MASK) {
dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n",
@@ -1050,7 +1077,6 @@ static int mxcmci_probe(struct platform_device *pdev)
mmc->caps |= MMC_CAP_SDIO_IRQ;
/* MMC core transfer sizes tunable parameters */
- mmc->max_segs = 64;
mmc->max_blk_size = 2048;
mmc->max_blk_count = 65535;
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
@@ -1069,6 +1095,11 @@ static int mxcmci_probe(struct platform_device *pdev)
} else {
host->devtype = pdev->id_entry->driver_data;
}
+
+ /* adjust max_segs after devtype detection */
+ if (!is_mpc512x_mmc(host))
+ mmc->max_segs = 64;
+
host->mmc = mmc;
host->pdata = pdata;
spin_lock_init(&host->lock);