[PATCH] mmc_spi: Fix cd-gpios for SPI SD card insertion/removal detection

[cuu <dexterkidd@gmail.com>]

Previously, SD cards using pure SPI protocol with mmc_spi could not
reliably detect card removal via cd-gpios. This patch fixes the issue
by extending the card alive check in _mmc_detect_card_removed() to
include cd-gpios detection.

Additionally, mmc_rescan() now includes a status probing function
specific to SPI SD cards to ensure the card state is correctly updated
on insertion and removal events.

Signed-off-by: cuu <dexterkidd@gmail.com>
---
 drivers/mmc/core/core.c | 15 ++++++++++++---
 drivers/mmc/core/core.h |  1 +
 drivers/mmc/core/mmc.c  |  8 ++++++++
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 874c6fe92855..e028ec8fbf46 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2123,6 +2123,11 @@ int _mmc_detect_card_removed(struct mmc_host *host)
 
 	ret = host->bus_ops->alive(host);
 
+        if(mmc_host_is_spi(host)) {
+        	if(host->ops->get_cd){
+       			ret = !host->ops->get_cd(host);
+                }
+        }
 	/*
 	 * Card detect status and alive check may be out of sync if card is
 	 * removed slowly, when card detect switch changes while card/slot
@@ -2238,9 +2243,13 @@ void mmc_rescan(struct work_struct *work)
 	}
 
 	/* Verify a registered card to be functional, else remove it. */
-	if (host->bus_ops)
-		host->bus_ops->detect(host);
-
+	if (host->bus_ops){
+		if (mmc_host_is_spi(host)){
+			mmc_detect_mmc(host);
+		}else{
+			host->bus_ops->detect(host);
+		}
+	}
 	host->detect_change = 0;
 
 	/* if there still is a card present, stop here */
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 622085cd766f..5b48c50b5bb5 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -78,6 +78,7 @@ void _mmc_detect_change(struct mmc_host *host, unsigned long delay,
 int _mmc_detect_card_removed(struct mmc_host *host);
 int mmc_detect_card_removed(struct mmc_host *host);
 
+int mmc_detect_mmc(struct mmc_host *host);
 int mmc_attach_mmc(struct mmc_host *host);
 int mmc_attach_sd(struct mmc_host *host);
 int mmc_attach_sdio(struct mmc_host *host);
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 5be9b42d5057..e73de34e072b 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -2316,6 +2316,14 @@ static const struct mmc_bus_ops mmc_ops = {
 	.flush_cache = _mmc_flush_cache,
 };
 
+/*
+ * Export function for mmc detection 
+ */
+int mmc_detect_mmc(struct mmc_host *host){
+	mmc_detect(host);
+	return 0;
+}
+
 /*
  * Starting point for MMC card init.
  */
-- 
2.34.1