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authorAdrian Hunter <adrian.hunter@nokia.com>2009-09-22 16:44:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 07:39:33 -0700
commit9feae246963c648b212abad0f0eb8938de5f5fe5 (patch)
treefefcc438ab0b8e502c35950e588664ab07ddc439 /drivers/mmc/core/sd.c
parent319a3f1429c91147058ac26c5f5bac8ec1730bc6 (diff)
mmc: add MMC_CAP_NONREMOVABLE host capability
eMMC's are not removable, so unsafe resume is OK always. To permit this a new host capability MMC_CAP_NONREMOVABLE has been added and suspend / resume updated accordingly. Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com> Acked-by: Matt Fleming <matt@console-pimps.org> Cc: Ian Molton <ian@mnementh.co.uk> Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com> Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com> Cc: Denis Karpov <ext-denis.2.karpov@nokia.com> Cc: Pierre Ossman <pierre@ossman.eu> Cc: Philip Langdale <philipl@overt.org> Cc: "Madhusudhan" <madhu.cr@ti.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/core/sd.c')
-rw-r--r--drivers/mmc/core/sd.c41
1 files changed, 34 insertions, 7 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 7ad646fe077..92fa9dceca7 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -561,8 +561,6 @@ static void mmc_sd_detect(struct mmc_host *host)
}
}
-#ifdef CONFIG_MMC_UNSAFE_RESUME
-
/*
* Suspend callback from host.
*/
@@ -605,20 +603,49 @@ static void mmc_sd_resume(struct mmc_host *host)
}
-#else
+#ifdef CONFIG_MMC_UNSAFE_RESUME
-#define mmc_sd_suspend NULL
-#define mmc_sd_resume NULL
+static const struct mmc_bus_ops mmc_sd_ops = {
+ .remove = mmc_sd_remove,
+ .detect = mmc_sd_detect,
+ .suspend = mmc_sd_suspend,
+ .resume = mmc_sd_resume,
+};
-#endif
+static void mmc_sd_attach_bus_ops(struct mmc_host *host)
+{
+ mmc_attach_bus(host, &mmc_sd_ops);
+}
+
+#else
static const struct mmc_bus_ops mmc_sd_ops = {
.remove = mmc_sd_remove,
.detect = mmc_sd_detect,
+ .suspend = NULL,
+ .resume = NULL,
+};
+
+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,
};
+static void mmc_sd_attach_bus_ops(struct mmc_host *host)
+{
+ const struct mmc_bus_ops *bus_ops;
+
+ if (host->caps & MMC_CAP_NONREMOVABLE)
+ bus_ops = &mmc_sd_ops_unsafe;
+ else
+ bus_ops = &mmc_sd_ops;
+ mmc_attach_bus(host, bus_ops);
+}
+
+#endif
+
/*
* Starting point for SD card init.
*/
@@ -629,7 +656,7 @@ 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.