diff mbox

[04/10,v2] mmc: tmio: control multiple block transfer mode

Message ID 87ha20o8o7.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State New, archived
Headers show

Commit Message

Kuninori Morimoto July 29, 2014, 8:45 a.m. UTC 
From: Shinobu Uehara <shinobu.uehara.xc@renesas.com>

Renesas SDHI has "Multiple Block Transfer Mode" settings
on SD_CMD register which controls CMD12 automatically.

This patch cares it, because
CMD12 is not needed when CMD53 (= SD_IO_RW_EXTENDED)

[Kuninori Morimoto: tidyuped for upstreaming
                    enabled this flags for all SH-Mobile/R-Car]

Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c |    5 +++++
 drivers/mmc/host/tmio_mmc_pio.c   |   10 ++++++++++
 include/linux/mfd/tmio.h          |    6 ++++++
 3 files changed, 21 insertions(+)
diff mbox

Patch

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 91c6399..1d54b78 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -225,6 +225,11 @@  static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	 */
 	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
 
+	/*
+	 * All SDHI have CMD12 controll bit
+	 */
+	mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
+
 	if (of_id && of_id->data) {
 		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
 		mmc_data->flags |= of_data->tmio_flags;
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index c3b1b4e..1f1fdfb 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -44,6 +44,7 @@ 
 #include <linux/pm_qos.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>
+#include <linux/mmc/sdio.h>
 #include <linux/scatterlist.h>
 #include <linux/spinlock.h>
 #include <linux/workqueue.h>
@@ -295,6 +296,7 @@  static void tmio_mmc_done_work(struct work_struct *work)
 #define TRANSFER_READ  0x1000
 #define TRANSFER_MULTI 0x2000
 #define SECURITY_CMD   0x4000
+#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */
 
 static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
 {
@@ -331,6 +333,14 @@  static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
 		if (data->blocks > 1) {
 			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
 			c |= TRANSFER_MULTI;
+
+			/*
+			 * Disable auto CMD12 at IO_RW_EXTENDED when
+			 * multiple block transfer
+			 */
+			if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
+			    (cmd->opcode == SD_IO_RW_EXTENDED))
+				c |= NO_CMD12_ISSUE;
 		}
 		if (data->flags & MMC_DATA_READ)
 			c |= TRANSFER_READ;
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 777e29b..7432d95 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -83,6 +83,12 @@ 
  */
 #define TMIO_MMC_HAVE_HIGH_REG		(1 << 6)
 
+/*
+ * Some controllers have CMD12 automatically
+ * issue/non-issue register
+ */
+#define TMIO_MMC_HAVE_CMD12_CTRL	(1 << 7)
+
 int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
 int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);
 void tmio_core_mmc_pwr(void __iomem *cnf, int shift, int state);