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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: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Axe Yang <axe.yang@mediatek.com>
Link: https://lore.kernel.org/r/20220726062842.18846-3-axe.yang@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Axe Yang 2022-07-26 14:28:41 +08:00 committed by Ulf Hansson
parent 035cc39517
commit 019e442bb0
3 changed files with 26 additions and 1 deletions
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14
drivers/mmc/core/sdio.c
View File

@ -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 */

8
include/linux/mmc/card.h
View File

@ -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)

5
include/linux/mmc/sdio.h
View File

@ -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)
*/