diff options
| author |   Axe Yang <axe.yang@mediatek.com> | 2022-07-26 14:28:41 +0800 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2022-07-26 16:58:31 +0200 |
| commit | 019e442bb0d5e7f25ada8eb4252e22e62d17a95e (patch) | |
| tree | 7c6757688498fdf2a640ed3f042e74b6cfa3c75f | |
| parent | dt-bindings: mmc: mtk-sd: extend interrupts and pinctrls properties (diff) | |
| download | linux-dev-019e442bb0d5e7f25ada8eb4252e22e62d17a95e.tar.xz linux-dev-019e442bb0d5e7f25ada8eb4252e22e62d17a95e.zip | |
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>
| -rw-r--r-- | drivers/mmc/core/sdio.c | 14 | ||||
| -rw-r--r-- | include/linux/mmc/card.h | 8 | ||||
| -rw-r--r-- | include/linux/mmc/sdio.h | 5 |
3 files changed, 26 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index b589df1c35e0..0b682a31cd3e 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -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 */ diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 156a7b673a28..8a30de08e913 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -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) diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h index 2a05d1ac4f0e..1ef400f28642 100644 --- a/include/linux/mmc/sdio.h +++ b/include/linux/mmc/sdio.h @@ -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) */ |