7 files changed, 124 insertions, 12 deletions

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index f210a8ee6861..bdb165f93046 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -84,6 +84,14 @@ mmc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 	}
 
 	retval = add_uevent_var(env, "MMC_NAME=%s", mmc_card_name(card));
+	if (retval)
+		return retval;
+
+	/*
+	 * Request the mmc_block device.  Note: that this is a direct request
+	 * for the module it carries no information as to what is inserted.
+	 */
+	retval = add_uevent_var(env, "MODALIAS=mmc:block");
 
 	return retval;
 }
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 1445ea8f10a6..264911732756 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -298,6 +298,21 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
 			data->timeout_clks = 0;
 		}
 	}
+	/*
+	 * Some cards need very high timeouts if driven in SPI mode.
+	 * The worst observed timeout was 900ms after writing a
+	 * continuous stream of data until the internal logic
+	 * overflowed.
+	 */
+	if (mmc_host_is_spi(card->host)) {
+		if (data->flags & MMC_DATA_WRITE) {
+			if (data->timeout_ns < 1000000000)
+				data->timeout_ns = 1000000000;	/* 1s */
+		} else {
+			if (data->timeout_ns < 100000000)
+				data->timeout_ns =  100000000;	/* 100ms */
+		}
+	}
 }
 EXPORT_SYMBOL(mmc_set_data_timeout);
 
@@ -691,7 +706,7 @@ static void mmc_power_up(struct mmc_host *host)
 	 * This delay should be sufficient to allow the power supply
 	 * to reach the minimum voltage.
 	 */
-	mmc_delay(2);
+	mmc_delay(10);
 
 	host->ios.clock = host->f_min;
 	host->ios.power_mode = MMC_POWER_ON;
@@ -701,7 +716,7 @@ static void mmc_power_up(struct mmc_host *host)
 	 * This delay must be at least 74 clock sizes, or 1 ms, or the
 	 * time required to reach a stable voltage.
 	 */
-	mmc_delay(2);
+	mmc_delay(10);
 }
 
 static void mmc_power_off(struct mmc_host *host)
@@ -915,6 +930,7 @@ void mmc_stop_host(struct mmc_host *host)
 	spin_unlock_irqrestore(&host->lock, flags);
 #endif
 
+	cancel_delayed_work(&host->detect);
 	mmc_flush_scheduled_work();
 
 	mmc_bus_get(host);
@@ -942,6 +958,7 @@ void mmc_stop_host(struct mmc_host *host)
  */
 int mmc_suspend_host(struct mmc_host *host, pm_message_t state)
 {
+	cancel_delayed_work(&host->detect);
 	mmc_flush_scheduled_work();
 
 	mmc_bus_get(host);
@@ -975,6 +992,7 @@ int mmc_resume_host(struct mmc_host *host)
 	mmc_bus_get(host);
 	if (host->bus_ops && !host->bus_dead) {
 		mmc_power_up(host);
+		mmc_select_voltage(host, host->ocr);
 		BUG_ON(!host->bus_ops->resume);
 		host->bus_ops->resume(host);
 	}
diff --git a/drivers/mmc/core/debugfs.c b/drivers/mmc/core/debugfs.c
index 1237bb4c722b..610dbd1fcc82 100644
--- a/drivers/mmc/core/debugfs.c
+++ b/drivers/mmc/core/debugfs.c
@@ -184,6 +184,68 @@ static int mmc_dbg_card_status_get(void *data, u64 *val)
 DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
 		NULL, "%08llx\n");
 
+#define EXT_CSD_STR_LEN 1025
+
+static int mmc_ext_csd_open(struct inode *inode, struct file *filp)
+{
+	struct mmc_card *card = inode->i_private;
+	char *buf;
+	ssize_t n = 0;
+	u8 *ext_csd;
+	int err, i;
+
+	buf = kmalloc(EXT_CSD_STR_LEN + 1, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ext_csd = kmalloc(512, GFP_KERNEL);
+	if (!ext_csd) {
+		err = -ENOMEM;
+		goto out_free;
+	}
+
+	mmc_claim_host(card->host);
+	err = mmc_send_ext_csd(card, ext_csd);
+	mmc_release_host(card->host);
+	if (err)
+		goto out_free;
+
+	for (i = 511; i >= 0; i--)
+		n += sprintf(buf + n, "%02x", ext_csd[i]);
+	n += sprintf(buf + n, "\n");
+	BUG_ON(n != EXT_CSD_STR_LEN);
+
+	filp->private_data = buf;
+	kfree(ext_csd);
+	return 0;
+
+out_free:
+	kfree(buf);
+	kfree(ext_csd);
+	return err;
+}
+
+static ssize_t mmc_ext_csd_read(struct file *filp, char __user *ubuf,
+				size_t cnt, loff_t *ppos)
+{
+	char *buf = filp->private_data;
+
+	return simple_read_from_buffer(ubuf, cnt, ppos,
+				       buf, EXT_CSD_STR_LEN);
+}
+
+static int mmc_ext_csd_release(struct inode *inode, struct file *file)
+{
+	kfree(file->private_data);
+	return 0;
+}
+
+static struct file_operations mmc_dbg_ext_csd_fops = {
+	.open		= mmc_ext_csd_open,
+	.read		= mmc_ext_csd_read,
+	.release	= mmc_ext_csd_release,
+};
+
 void mmc_add_card_debugfs(struct mmc_card *card)
 {
 	struct mmc_host	*host = card->host;
@@ -211,6 +273,11 @@ void mmc_add_card_debugfs(struct mmc_card *card)
 					&mmc_dbg_card_status_fops))
 			goto err;
 
+	if (mmc_card_mmc(card))
+		if (!debugfs_create_file("ext_csd", S_IRUSR, root, card,
+					&mmc_dbg_ext_csd_fops))
+			goto err;
+
 	return;
 
 err:
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index c232d11a7ed4..06084dbf1277 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -208,7 +208,7 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 	}
 
 	ext_csd_struct = ext_csd[EXT_CSD_REV];
-	if (ext_csd_struct > 2) {
+	if (ext_csd_struct > 3) {
 		printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
 			"version %d\n", mmc_hostname(card->host),
 			ext_csd_struct);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 26fc098d77cd..cd81c395e164 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -363,15 +363,6 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 		goto err;
 
 	/*
-	 * For SPI, enable CRC as appropriate.
-	 */
-	if (mmc_host_is_spi(host)) {
-		err = mmc_spi_set_crc(host, use_spi_crc);
-		if (err)
-			goto err;
-	}
-
-	/*
 	 * Fetch CID from card.
 	 */
 	if (mmc_host_is_spi(host))
@@ -458,6 +449,18 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 	}
 
 	/*
+	 * For SPI, enable CRC as appropriate.
+	 * This CRC enable is located AFTER the reading of the
+	 * card registers because some SDHC cards are not able
+	 * to provide valid CRCs for non-512-byte blocks.
+	 */
+	if (mmc_host_is_spi(host)) {
+		err = mmc_spi_set_crc(host, use_spi_crc);
+		if (err)
+			goto free_card;
+	}
+
+	/*
 	 * Attempt to change to high-speed (if supported)
 	 */
 	err = mmc_switch_hs(card);
diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
index 956bd7677502..963f2937c5e3 100644
--- a/drivers/mmc/core/sdio_cis.c
+++ b/drivers/mmc/core/sdio_cis.c
@@ -223,10 +223,18 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
 		if (tpl_code == 0xff)
 			break;
 
+		/* null entries have no link field or data */
+		if (tpl_code == 0x00)
+			continue;
+
 		ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
 		if (ret)
 			break;
 
+		/* a size of 0xff also means we're done */
+		if (tpl_link == 0xff)
+			break;
+
 		this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
 		if (!this)
 			return -ENOMEM;
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index c8fa095a4488..4eb7825fd1a7 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -76,6 +76,10 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
 	BUG_ON(!card);
 	BUG_ON(fn > 7);
 
+	/* sanity check */
+	if (addr & ~0x1FFFF)
+		return -EINVAL;
+
 	memset(&cmd, 0, sizeof(struct mmc_command));
 
 	cmd.opcode = SD_IO_RW_DIRECT;
@@ -125,6 +129,10 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 	WARN_ON(blocks == 0);
 	WARN_ON(blksz == 0);
 
+	/* sanity check */
+	if (addr & ~0x1FFFF)
+		return -EINVAL;
+
 	memset(&mrq, 0, sizeof(struct mmc_request));
 	memset(&cmd, 0, sizeof(struct mmc_command));
 	memset(&data, 0, sizeof(struct mmc_data));