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Commit 452e5eef authored by Wolfram Sang's avatar Wolfram Sang Committed by Ulf Hansson
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mmc: tmio: Add UHS-I mode support 



Based on work by Shinobu Uehara and Ben Dooks. This adds the voltage
switch operation needed for all UHS-I modes, but not the tuning needed
for SDR-104 which will come later.

Signed-off-by: default avatarBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 2fb55956

drivers/mmc/host/tmio_mmc.h

+2 −0
Original line number Diff line number Diff line
@@ -101,6 +101,8 @@ struct tmio_mmc_host { 
	void (*clk_disable)(struct tmio_mmc_host *host);

	int (*multi_io_quirk)(struct mmc_card *card,

			      unsigned int direction, int blk_size);

	int (*start_signal_voltage_switch)(struct mmc_host *mmc,

					   struct mmc_ios *ios);

};



struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);

drivers/mmc/host/tmio_mmc_pio.c

+11 −1
Original line number Diff line number Diff line
@@ -1012,12 +1012,20 @@ static int tmio_multi_io_quirk(struct mmc_card *card, 
	return blk_size;

}



static const struct mmc_host_ops tmio_mmc_ops = {

static int tmio_mmc_card_busy(struct mmc_host *mmc)

{

	struct tmio_mmc_host *host = mmc_priv(mmc);



	return !(sd_ctrl_read32(host, CTL_STATUS2) & TMIO_STATUS2_DAT0);

}



static struct mmc_host_ops tmio_mmc_ops = {

	.request	= tmio_mmc_request,

	.set_ios	= tmio_mmc_set_ios,

	.get_ro         = tmio_mmc_get_ro,

	.get_cd		= mmc_gpio_get_cd,

	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,

	.card_busy	= tmio_mmc_card_busy,

	.multi_io_quirk	= tmio_multi_io_quirk,

};
@@ -1116,7 +1124,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host, 
		goto host_free;

	}



	tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch;

	mmc->ops = &tmio_mmc_ops;



	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;

	mmc->caps2 |= pdata->capabilities2;

	mmc->max_segs = 32;

include/linux/mmc/tmio.h

+2 −0
Original line number Diff line number Diff line
@@ -63,6 +63,8 @@ 
#define TMIO_STAT_CMD_BUSY      0x40000000

#define TMIO_STAT_ILL_ACCESS    0x80000000



#define TMIO_STATUS2_DAT0	BIT(7)



#define	CLK_CTL_DIV_MASK	0xff

#define	CLK_CTL_SCLKEN		BIT(8)