3 files changed, 75 insertions, 6 deletions

diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 240608cc7ae..a461017ce5c 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1313,6 +1313,12 @@ static int mmc_spi_probe(struct spi_device *spi)
 	struct mmc_spi_host	*host;
 	int			status;
 
+	/* We rely on full duplex transfers, mostly to reduce
+	 * per-transfer overheads (by making fewer transfers).
+	 */
+	if (spi->master->flags & SPI_MASTER_HALF_DUPLEX)
+		return -EINVAL;
+
 	/* MMC and SD specs only seem to care that sampling is on the
 	 * rising edge ... meaning SPI modes 0 or 3.  So either SPI mode
 	 * should be legit.  We'll use mode 0 since the steady state is 0,
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index e1aa8471ab1..a923ee27c09 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -21,6 +21,7 @@
 #include <linux/amba/bus.h>
 #include <linux/clk.h>
 #include <linux/scatterlist.h>
+#include <linux/gpio.h>
 
 #include <asm/cacheflush.h>
 #include <asm/div64.h>
@@ -472,17 +473,41 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	}
 }
 
+static int mmci_get_ro(struct mmc_host *mmc)
+{
+	struct mmci_host *host = mmc_priv(mmc);
+
+	if (host->gpio_wp == -ENOSYS)
+		return -ENOSYS;
+
+	return gpio_get_value(host->gpio_wp);
+}
+
+static int mmci_get_cd(struct mmc_host *mmc)
+{
+	struct mmci_host *host = mmc_priv(mmc);
+	unsigned int status;
+
+	if (host->gpio_cd == -ENOSYS)
+		status = host->plat->status(mmc_dev(host->mmc));
+	else
+		status = gpio_get_value(host->gpio_cd);
+
+	return !status;
+}
+
 static const struct mmc_host_ops mmci_ops = {
 	.request	= mmci_request,
 	.set_ios	= mmci_set_ios,
+	.get_ro		= mmci_get_ro,
+	.get_cd		= mmci_get_cd,
 };
 
 static void mmci_check_status(unsigned long data)
 {
 	struct mmci_host *host = (struct mmci_host *)data;
-	unsigned int status;
+	unsigned int status = mmci_get_cd(host->mmc);
 
-	status = host->plat->status(mmc_dev(host->mmc));
 	if (status ^ host->oldstat)
 		mmc_detect_change(host->mmc, 0);
 
@@ -515,12 +540,15 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
 
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
-	/* Bits 12 thru 19 is the designer */
-	host->hw_designer = (dev->periphid >> 12) & 0xff;
-	/* Bits 20 thru 23 is the revison */
-	host->hw_revision = (dev->periphid >> 20) & 0xf;
+
+	host->gpio_wp = -ENOSYS;
+	host->gpio_cd = -ENOSYS;
+
+	host->hw_designer = amba_manf(dev);
+	host->hw_revision = amba_rev(dev);
 	DBG(host, "designer ID = 0x%02x\n", host->hw_designer);
 	DBG(host, "revision = 0x%01x\n", host->hw_revision);
+
 	host->clk = clk_get(&dev->dev, NULL);
 	if (IS_ERR(host->clk)) {
 		ret = PTR_ERR(host->clk);
@@ -591,6 +619,27 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
 	writel(0, host->base + MMCIMASK1);
 	writel(0xfff, host->base + MMCICLEAR);
 
+#ifdef CONFIG_GPIOLIB
+	if (gpio_is_valid(plat->gpio_cd)) {
+		ret = gpio_request(plat->gpio_cd, DRIVER_NAME " (cd)");
+		if (ret == 0)
+			ret = gpio_direction_input(plat->gpio_cd);
+		if (ret == 0)
+			host->gpio_cd = plat->gpio_cd;
+		else if (ret != -ENOSYS)
+			goto err_gpio_cd;
+	}
+	if (gpio_is_valid(plat->gpio_wp)) {
+		ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)");
+		if (ret == 0)
+			ret = gpio_direction_input(plat->gpio_wp);
+		if (ret == 0)
+			host->gpio_wp = plat->gpio_wp;
+		else if (ret != -ENOSYS)
+			goto err_gpio_wp;
+	}
+#endif
+
 	ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host);
 	if (ret)
 		goto unmap;
@@ -602,6 +651,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
 	writel(MCI_IRQENABLE, host->base + MMCIMASK0);
 
 	amba_set_drvdata(dev, mmc);
+	host->oldstat = mmci_get_cd(host->mmc);
 
 	mmc_add_host(mmc);
 
@@ -620,6 +670,12 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
  irq0_free:
 	free_irq(dev->irq[0], host);
  unmap:
+	if (host->gpio_wp != -ENOSYS)
+		gpio_free(host->gpio_wp);
+ err_gpio_wp:
+	if (host->gpio_cd != -ENOSYS)
+		gpio_free(host->gpio_cd);
+ err_gpio_cd:
 	iounmap(host->base);
  clk_disable:
 	clk_disable(host->clk);
@@ -655,6 +711,11 @@ static int __devexit mmci_remove(struct amba_device *dev)
 		free_irq(dev->irq[0], host);
 		free_irq(dev->irq[1], host);
 
+		if (host->gpio_wp != -ENOSYS)
+			gpio_free(host->gpio_wp);
+		if (host->gpio_cd != -ENOSYS)
+			gpio_free(host->gpio_cd);
+
 		iounmap(host->base);
 		clk_disable(host->clk);
 		clk_put(host->clk);
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 0441bac1c0e..839f264c972 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -151,6 +151,8 @@ struct mmci_host {
 	struct mmc_data		*data;
 	struct mmc_host		*mmc;
 	struct clk		*clk;
+	int			gpio_cd;
+	int			gpio_wp;
 
 	unsigned int		data_xfered;