Commit 019e442b authored by Axe Yang's avatar Axe Yang Committed by Ulf Hansson
Browse files

mmc: core: Add support for SDIO wakeup interrupt 



If wakeup-source flag is set in host dts node, parse EAI information
from SDIO CCCR interrupt externsion segment for in-band wakeup. If
async interrupt is supported by SDIO card then enable it and set
enable_async_irq flag in sdio_cccr structure to 1. The parse flow is
implemented in sdio_read_cccr().

Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: default avatarAxe Yang <axe.yang@mediatek.com>
Link: https://lore.kernel.org/r/20220726062842.18846-3-axe.yang@mediatek.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 035cc395

drivers/mmc/core/sdio.c

+14 −0
Original line number Diff line number Diff line
@@ -226,6 +226,20 @@ static int sdio_read_cccr(struct mmc_card *card, u32 ocr) 
				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;

			if (data & SDIO_DRIVE_SDTD)

				card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;



			ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTERRUPT_EXT, 0, &data);

			if (ret)

				goto out;



			if (data & SDIO_INTERRUPT_EXT_SAI) {

				data |= SDIO_INTERRUPT_EXT_EAI;

				ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_INTERRUPT_EXT,

						       data, NULL);

				if (ret)

					goto out;



				card->cccr.enable_async_irq = 1;

			}

		}



		/* if no uhs mode ensure we check for high speed */

include/linux/mmc/card.h

+7 −1
Original line number Diff line number Diff line
@@ -219,7 +219,8 @@ struct sdio_cccr { 
				wide_bus:1,

				high_power:1,

				high_speed:1,

				disable_cd:1;

				disable_cd:1,

				enable_async_irq:1;

};



struct sdio_cis {
@@ -343,6 +344,11 @@ static inline bool mmc_large_sector(struct mmc_card *card) 
	return card->ext_csd.data_sector_size == 4096;

}



static inline int mmc_card_enable_async_irq(struct mmc_card *card)

{

	return card->cccr.enable_async_irq;

}



bool mmc_card_is_blockaddr(struct mmc_card *card);



#define mmc_card_mmc(c)		((c)->type == MMC_TYPE_MMC)

include/linux/mmc/sdio.h

+5 −0
Original line number Diff line number Diff line
@@ -159,6 +159,11 @@ 
#define  SDIO_DTSx_SET_TYPE_A	(1 << SDIO_DRIVE_DTSx_SHIFT)

#define  SDIO_DTSx_SET_TYPE_C	(2 << SDIO_DRIVE_DTSx_SHIFT)

#define  SDIO_DTSx_SET_TYPE_D	(3 << SDIO_DRIVE_DTSx_SHIFT)



#define SDIO_CCCR_INTERRUPT_EXT	0x16

#define SDIO_INTERRUPT_EXT_SAI	(1 << 0)

#define SDIO_INTERRUPT_EXT_EAI	(1 << 1)



/*

 * Function Basic Registers (FBR)

 */