Merge branch 'linux-tegra-2.6.36' into android-tegra-2.6.36

6 files changed, 129 insertions, 5 deletions

diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c
index a063c34ecf60..23cb9acc588c 100644
--- a/arch/arm/mach-tegra/cpuidle.c
+++ b/arch/arm/mach-tegra/cpuidle.c
@@ -445,6 +445,7 @@ static int tegra_idle_enter_lp2(struct cpuidle_device *dev,
 		return tegra_idle_enter_lp3(dev, state);
 
 	local_irq_disable();
+	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);
 	local_fiq_disable();
 	enter = ktime_get();
 
@@ -463,11 +464,9 @@ static int tegra_idle_enter_lp2(struct cpuidle_device *dev,
 	us = ktime_to_us(exit);
 
 	local_fiq_enable();
+	clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);
 	local_irq_enable();
 
-	/* cpu clockevents may have been reset by powerdown */
-	hrtimer_peek_ahead_timers();
-
 	smp_rmb();
 	state->exit_latency = tegra_lp2_exit_latency;
 	state->target_residency = tegra_lp2_exit_latency +
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 5cca00a6d09d..f24f40eba180 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1265,6 +1265,14 @@ static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle,
 
 static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
+	if (hcd->driver->unmap_urb_for_dma)
+		hcd->driver->unmap_urb_for_dma(hcd, urb);
+	else
+		usb_hcd_unmap_urb_for_dma(hcd, urb);
+}
+
+void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
+{
 	enum dma_data_direction dir;
 
 	if (urb->transfer_flags & URB_SETUP_MAP_SINGLE)
@@ -1307,10 +1315,20 @@ static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 			URB_DMA_MAP_SG | URB_DMA_MAP_PAGE |
 			URB_DMA_MAP_SINGLE | URB_MAP_LOCAL);
 }
+EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma);
 
 static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 			   gfp_t mem_flags)
 {
+	if (hcd->driver->map_urb_for_dma)
+		return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags);
+	else
+		return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
+}
+
+int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
+			    gfp_t mem_flags)
+{
 	enum dma_data_direction dir;
 	int ret = 0;
 
@@ -1400,10 +1418,11 @@ static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 		}
 		if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE |
 				URB_SETUP_MAP_LOCAL)))
-			unmap_urb_for_dma(hcd, urb);
+			usb_hcd_unmap_urb_for_dma(hcd, urb);
 	}
 	return ret;
 }
+EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma);
 
 /*-------------------------------------------------------------------------*/
 
diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
index 3c72ed4c6cdc..a4f297544a1c 100644
--- a/drivers/usb/host/ehci-tegra.c
+++ b/drivers/usb/host/ehci-tegra.c
@@ -32,6 +32,8 @@
 #define TEGRA_USB_USBMODE_HOST			(3 << 0)
 #define TEGRA_USB_PORTSC1_PTC(x)		(((x) & 0xf) << 16)
 
+#define TEGRA_USB_DMA_ALIGN 32
+
 struct tegra_ehci_context {
 	bool valid;
 	u32 command;
@@ -468,6 +470,92 @@ static int tegra_ehci_bus_resume(struct usb_hcd *hcd)
 }
 #endif
 
+struct temp_buffer {
+	void *kmalloc_ptr;
+	void *old_xfer_buffer;
+	u8 data[0];
+};
+
+static void free_temp_buffer(struct urb *urb)
+{
+	enum dma_data_direction dir;
+	struct temp_buffer *temp;
+
+	if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER))
+		return;
+
+	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+	temp = container_of(urb->transfer_buffer, struct temp_buffer,
+			    data);
+
+	if (dir == DMA_FROM_DEVICE)
+		memcpy(temp->old_xfer_buffer, temp->data,
+		       urb->transfer_buffer_length);
+	urb->transfer_buffer = temp->old_xfer_buffer;
+	kfree(temp->kmalloc_ptr);
+
+	urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER;
+}
+
+static int alloc_temp_buffer(struct urb *urb, gfp_t mem_flags)
+{
+	enum dma_data_direction dir;
+	struct temp_buffer *temp, *kmalloc_ptr;
+	size_t kmalloc_size;
+
+	if (urb->num_sgs || urb->sg ||
+	    urb->transfer_buffer_length == 0 ||
+	    !((uintptr_t)urb->transfer_buffer & (TEGRA_USB_DMA_ALIGN - 1)))
+		return 0;
+
+	dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+	/* Allocate a buffer with enough padding for alignment */
+	kmalloc_size = urb->transfer_buffer_length +
+		sizeof(struct temp_buffer) + TEGRA_USB_DMA_ALIGN - 1;
+
+	kmalloc_ptr = kmalloc(kmalloc_size, mem_flags);
+	if (!kmalloc_ptr)
+		return -ENOMEM;
+
+	/* Position our struct temp_buffer such that data is aligned */
+	temp = PTR_ALIGN(kmalloc_ptr + 1, TEGRA_USB_DMA_ALIGN) - 1;
+
+	temp->kmalloc_ptr = kmalloc_ptr;
+	temp->old_xfer_buffer = urb->transfer_buffer;
+	if (dir == DMA_TO_DEVICE)
+		memcpy(temp->data, urb->transfer_buffer,
+		       urb->transfer_buffer_length);
+	urb->transfer_buffer = temp->data;
+
+	urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER;
+
+	return 0;
+}
+
+static int tegra_ehci_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
+				      gfp_t mem_flags)
+{
+	int ret;
+
+	ret = alloc_temp_buffer(urb, mem_flags);
+	if (ret)
+		return ret;
+
+	ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
+	if (ret)
+		free_temp_buffer(urb);
+
+	return ret;
+}
+
+static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
+{
+	usb_hcd_unmap_urb_for_dma(hcd, urb);
+	free_temp_buffer(urb);
+}
+
 static const struct hc_driver tegra_ehci_hc_driver = {
 	.description		= hcd_name,
 	.product_desc		= "Tegra EHCI Host Controller",
@@ -483,6 +571,8 @@ static const struct hc_driver tegra_ehci_hc_driver = {
 	.shutdown		= tegra_ehci_shutdown,
 	.urb_enqueue		= ehci_urb_enqueue,
 	.urb_dequeue		= ehci_urb_dequeue,
+	.map_urb_for_dma	= tegra_ehci_map_urb_for_dma,
+	.unmap_urb_for_dma	= tegra_ehci_unmap_urb_for_dma,
 	.endpoint_disable	= ehci_endpoint_disable,
 	.endpoint_reset		= ehci_endpoint_reset,
 	.get_frame_number	= ehci_get_frame,
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
index 5b35987e691b..dd11ae51fb68 100644
--- a/include/linux/mmc/mmc.h
+++ b/include/linux/mmc/mmc.h
@@ -262,7 +262,6 @@ struct _mmc_csd {
 #define EXT_CSD_S_A_TIMEOUT		217	/* RO */
 #define EXT_CSD_ERASE_TIMEOUT_MULT	223	/* RO */
 #define EXT_CSD_HC_ERASE_GRP_SIZE	224	/* RO */
-#define EXT_CSD_BOOT_SIZE_MULTI		226
 #define EXT_CSD_SEC_TRIM_MULT		229	/* RO */
 #define EXT_CSD_SEC_ERASE_MULT		230	/* RO */
 #define EXT_CSD_SEC_FEATURE_SUPPORT	231	/* RO */
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 35fe6ab222bb..6d4566ee34c9 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -975,6 +975,7 @@ extern int usb_disabled(void);
 #define URB_SETUP_MAP_SINGLE	0x00100000	/* Setup packet DMA mapped */
 #define URB_SETUP_MAP_LOCAL	0x00200000	/* HCD-local setup packet */
 #define URB_DMA_SG_COMBINED	0x00400000	/* S-G entries were combined */
+#define URB_ALIGNED_TEMP_BUFFER	0x00800000	/* Temp buffer was alloc'd */
 
 struct usb_iso_packet_descriptor {
 	unsigned int offset;
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index 3b571f1ffbb3..6e1b7507e103 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -233,6 +233,19 @@ struct hc_driver {
 	int	(*urb_dequeue)(struct usb_hcd *hcd,
 				struct urb *urb, int status);
 
+	/*
+	 * (optional) these hooks allow an HCD to override the default DMA
+	 * mapping and unmapping routines.  In general, they shouldn't be
+	 * necessary unless the host controller has special DMA requirements,
+	 * such as alignment contraints.  If these are not specified, the
+	 * general usb_hcd_(un)?map_urb_for_dma functions will be used instead
+	 * (and it may be a good idea to call these functions in your HCD
+	 * implementation)
+	 */
+	int	(*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb,
+				   gfp_t mem_flags);
+	void    (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb);
+
 	/* hw synch, freeing endpoint resources that urb_dequeue can't */
 	void	(*endpoint_disable)(struct usb_hcd *hcd,
 			struct usb_host_endpoint *ep);
@@ -329,6 +342,9 @@ extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
 extern int usb_hcd_unlink_urb(struct urb *urb, int status);
 extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
 		int status);
+extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
+		gfp_t mem_flags);
+extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *);
 extern void usb_hcd_flush_endpoint(struct usb_device *udev,
 		struct usb_host_endpoint *ep);
 extern void usb_hcd_disable_endpoint(struct usb_device *udev,