@@ -401,6 +401,8 @@ int mmc_of_parse(struct mmc_host *host)
if (device_property_read_bool(dev, "no-mmc-hs400"))
host->caps2 &= ~(MMC_CAP2_HS400_1_8V | MMC_CAP2_HS400_1_2V |
MMC_CAP2_HS400_ES);
+ if (device_property_read_bool(dev, "cap-sdio-async-int"))
+ host->caps2 |= MMC_CAP2_SDIO_ASYNC_INT;
/* Must be after "non-removable" check */
if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) {
@@ -225,6 +225,23 @@ 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;
+
+ if (card->host->caps2 & MMC_CAP2_SDIO_ASYNC_INT) {
+ 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_int = 1;
+ }
+ }
}
/* if no uhs mode ensure we check for high speed */
@@ -219,7 +219,8 @@ struct sdio_cccr {
wide_bus:1,
high_power:1,
high_speed:1,
- disable_cd:1;
+ disable_cd:1,
+ enable_async_int:1;
};
struct sdio_cis {
@@ -399,6 +399,7 @@ struct mmc_host {
#define MMC_CAP2_CRYPTO 0
#endif
#define MMC_CAP2_ALT_GPT_TEGRA (1 << 28) /* Host with eMMC that has GPT entry at a non-standard location */
+#define MMC_CAP2_SDIO_ASYNC_INT (1 << 29) /* SDIO host supports asynchronous interrupt */
int fixed_drv_type; /* fixed driver type for non-removable media */
@@ -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)
*/
If cap-sdio-async-int flag is set in host dts node, parse EAI information from SDIO CCCR interrupt externsion segment. If async interrupt is supported by SDIO card then send command to card to enable it and set enable_async_int flag in sdio_cccr structure to 1. The parse flow is implemented in sdio_read_cccr(). Signed-off-by: Axe Yang <axe.yang@mediatek.com> --- drivers/mmc/core/host.c | 2 ++ drivers/mmc/core/sdio.c | 17 +++++++++++++++++ include/linux/mmc/card.h | 3 ++- include/linux/mmc/host.h | 1 + include/linux/mmc/sdio.h | 5 +++++ 5 files changed, 27 insertions(+), 1 deletion(-)