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mmc: tmio: control multiple block transfer mode

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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]

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Signed-off-by: Shinobu Uehara <shinobu.uehara.xc@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shinobu Uehara 2014-08-24 20:00:25 -07:00 committed by Ulf Hansson
parent f83bfa751b
commit b8d11962c2
3 changed files with 21 additions and 0 deletions
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5
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -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;

10
drivers/mmc/host/tmio_mmc_pio.c
View File

@ -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>
@ -310,6 +311,7 @@ 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)
{
@ -346,6 +348,14 @@ 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;

6
include/linux/mfd/tmio.h
View File

@ -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);