From a9d2ba1444b0af6c2d8534f0b306660ffc045bc6 Mon Sep 17 00:00:00 2001
From: Ian Wisbon <ian.wisbon@timesys.com>
Date: Thu, 10 Feb 2011 17:15:15 -0500
Subject: Linux 2.6.31 Release for Digi ConnectCore Wi-i.MX boards

---
 drivers/mmc/core/sd.c | 52 ++++++++++++++++++++++++++++++++-------------------
 1 file changed, 33 insertions(+), 19 deletions(-)

(limited to 'drivers/mmc/core/sd.c')

diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index cd81c395e164..4a73e34f9200 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -561,12 +561,10 @@ static void mmc_sd_detect(struct mmc_host *host)
 	}
 }
 
-#ifdef CONFIG_MMC_UNSAFE_RESUME
-
 /*
  * Suspend callback from host.
  */
-static void mmc_sd_suspend(struct mmc_host *host)
+static int mmc_sd_suspend(struct mmc_host *host)
 {
 	BUG_ON(!host);
 	BUG_ON(!host->card);
@@ -576,6 +574,8 @@ static void mmc_sd_suspend(struct mmc_host *host)
 		mmc_deselect_cards(host);
 	host->card->state &= ~MMC_STATE_HIGHSPEED;
 	mmc_release_host(host);
+
+	return 0;
 }
 
 /*
@@ -584,7 +584,7 @@ static void mmc_sd_suspend(struct mmc_host *host)
  * This function tries to determine if the same card is still present
  * and, if so, restore all state to it.
  */
-static void mmc_sd_resume(struct mmc_host *host)
+static int mmc_sd_resume(struct mmc_host *host)
 {
 	int err;
 
@@ -595,30 +595,44 @@ static void mmc_sd_resume(struct mmc_host *host)
 	err = mmc_sd_init_card(host, host->ocr, host->card);
 	mmc_release_host(host);
 
-	if (err) {
-		mmc_sd_remove(host);
-
-		mmc_claim_host(host);
-		mmc_detach_bus(host);
-		mmc_release_host(host);
-	}
-
+	return err;
 }
 
-#else
-
-#define mmc_sd_suspend NULL
-#define mmc_sd_resume NULL
-
-#endif
+static void mmc_sd_power_restore(struct mmc_host *host)
+{
+	host->card->state &= ~MMC_STATE_HIGHSPEED;
+	mmc_claim_host(host);
+	mmc_sd_init_card(host, host->ocr, host->card);
+	mmc_release_host(host);
+}
 
 static const struct mmc_bus_ops mmc_sd_ops = {
+	.remove = mmc_sd_remove,
+	.detect = mmc_sd_detect,
+	.suspend = NULL,
+	.resume = NULL,
+	.power_restore = mmc_sd_power_restore,
+};
+
+static const struct mmc_bus_ops mmc_sd_ops_unsafe = {
 	.remove = mmc_sd_remove,
 	.detect = mmc_sd_detect,
 	.suspend = mmc_sd_suspend,
 	.resume = mmc_sd_resume,
+	.power_restore = mmc_sd_power_restore,
 };
 
+static void mmc_sd_attach_bus_ops(struct mmc_host *host)
+{
+	const struct mmc_bus_ops *bus_ops;
+
+	if (host->caps & MMC_CAP_NONREMOVABLE || !mmc_assume_removable)
+		bus_ops = &mmc_sd_ops_unsafe;
+	else
+		bus_ops = &mmc_sd_ops;
+	mmc_attach_bus(host, bus_ops);
+}
+
 /*
  * Starting point for SD card init.
  */
@@ -629,7 +643,7 @@ int mmc_attach_sd(struct mmc_host *host, u32 ocr)
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
 
-	mmc_attach_bus(host, &mmc_sd_ops);
+	mmc_sd_attach_bus_ops(host);
 
 	/*
 	 * We need to get OCR a different way for SPI.
-- 
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