From: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
Now, sh_mobile_sdhi can use blk_size_workaround instead of
MMC_CAP2_NO_MULTI_READ. let's use it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
---
v1 -> v2
- no change
drivers/mmc/host/sh_mobile_sdhi.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c
b/drivers/mmc/host/sh_mobile_sdhi.c
index f2585b6..474cd8e 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -58,7 +58,6 @@ static const struct sh_mobile_sdhi_of_data
of_rcar_gen2_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
TMIO_MMC_CLK_ACTUAL,
.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
- .capabilities2 = MMC_CAP2_NO_MULTI_READ,
.dma_rx_offset = 0x2000,
};
@@ -139,6 +138,24 @@ static int sh_mobile_sdhi_write16_hook(struct
tmio_mmc_host *host, int addr)
return 0;
}
+static int sh_mobile_blk_size_workaround(struct mmc_card *card,
+ struct request *req, int blk_size)
+{
+ /*
+ * In Renesas controllers, when performing a
+ * multiple block read of one or two blocks,
+ * depending on the timing with which the
+ * response register is read, the response
+ * value may not be read properly.
+ * Use single block read for this HW bug
+ */
+ if ((rq_data_dir(req) == READ) &&
+ blk_size == 2)
+ return 1;
+
+ return blk_size;
+}
+
static void sh_mobile_sdhi_cd_wakeup(const struct platform_device *pdev)
{
mmc_detect_change(platform_get_drvdata(pdev), msecs_to_jiffies(100));
@@ -194,6 +211,7 @@ static int sh_mobile_sdhi_probe(struct platform_device
*pdev)
mmc_data->clk_disable = sh_mobile_sdhi_clk_disable;
mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
mmc_data->write16_hook = sh_mobile_sdhi_write16_hook;
+ mmc_data->blk_size_workaround = sh_mobile_blk_size_workaround;
if (p) {
mmc_data->flags = p->tmio_flags;
mmc_data->ocr_mask = p->tmio_ocr_mask;
--
1.7.9.5
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