#include <linux/timer.h>
#include <linux/ctype.h>
#include <linux/device.h>
+#include <linux/usb/quirks.h>
#include <asm/byteorder.h>
#include <asm/scatterlist.h>
io->urbs [i]->status = -EINPROGRESS;
io->urbs [i]->actual_length = 0;
+ /*
+ * Some systems need to revert to PIO when DMA is temporarily
+ * unavailable. For their sakes, both transfer_buffer and
+ * transfer_dma are set when possible. However this can only
+ * work on systems without HIGHMEM, since DMA buffers located
+ * in high memory are not directly addressable by the CPU for
+ * PIO ... so when HIGHMEM is in use, transfer_buffer is NULL
+ * to prevent stale pointers and to help spot bugs.
+ */
if (dma) {
- /* hc may use _only_ transfer_dma */
io->urbs [i]->transfer_dma = sg_dma_address (sg + i);
len = sg_dma_len (sg + i);
+#ifdef CONFIG_HIGHMEM
+ io->urbs[i]->transfer_buffer = NULL;
+#else
+ io->urbs[i]->transfer_buffer =
+ page_address(sg[i].page) + sg[i].offset;
+#endif
} else {
/* hc may use _only_ transfer_buffer */
io->urbs [i]->transfer_buffer =
/* Try to read the string descriptor by asking for the maximum
* possible number of bytes */
- rc = usb_get_string(dev, langid, index, buf, 255);
+ if (dev->quirks & USB_QUIRK_STRING_FETCH_255)
+ rc = -EIO;
+ else
+ rc = usb_get_string(dev, langid, index, buf, 255);
/* If that failed try to read the descriptor length, then
* ask for just that many bytes */
return 0;
}
-static void release_interface(struct device *dev)
+void usb_release_interface(struct device *dev)
{
struct usb_interface *intf = to_usb_interface(dev);
struct usb_interface_cache *intfc =
kfree(intf);
}
+#ifdef CONFIG_HOTPLUG
+static int usb_if_uevent(struct device *dev, char **envp, int num_envp,
+ char *buffer, int buffer_size)
+{
+ struct usb_device *usb_dev;
+ struct usb_interface *intf;
+ struct usb_host_interface *alt;
+ int i = 0;
+ int length = 0;
+
+ if (!dev)
+ return -ENODEV;
+
+ /* driver is often null here; dev_dbg() would oops */
+ pr_debug ("usb %s: uevent\n", dev->bus_id);
+
+ intf = to_usb_interface(dev);
+ usb_dev = interface_to_usbdev(intf);
+ alt = intf->cur_altsetting;
+
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "INTERFACE=%d/%d/%d",
+ alt->desc.bInterfaceClass,
+ alt->desc.bInterfaceSubClass,
+ alt->desc.bInterfaceProtocol))
+ return -ENOMEM;
+
+ if (add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "MODALIAS=usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic%02Xisc%02Xip%02X",
+ le16_to_cpu(usb_dev->descriptor.idVendor),
+ le16_to_cpu(usb_dev->descriptor.idProduct),
+ le16_to_cpu(usb_dev->descriptor.bcdDevice),
+ usb_dev->descriptor.bDeviceClass,
+ usb_dev->descriptor.bDeviceSubClass,
+ usb_dev->descriptor.bDeviceProtocol,
+ alt->desc.bInterfaceClass,
+ alt->desc.bInterfaceSubClass,
+ alt->desc.bInterfaceProtocol))
+ return -ENOMEM;
+
+ envp[i] = NULL;
+ return 0;
+}
+
+#else
+
+static int usb_if_uevent(struct device *dev, char **envp,
+ int num_envp, char *buffer, int buffer_size)
+{
+ return -ENODEV;
+}
+#endif /* CONFIG_HOTPLUG */
+
+struct device_type usb_if_device_type = {
+ .name = "usb_interface",
+ .release = usb_release_interface,
+ .uevent = usb_if_uevent,
+};
+
/*
* usb_set_configuration - Makes a particular device setting be current
* @dev: the device whose configuration is being updated
*
* This call is synchronous. The calling context must be able to sleep,
* must own the device lock, and must not hold the driver model's USB
- * bus rwsem; usb device driver probe() methods cannot use this routine.
+ * bus mutex; usb device driver probe() methods cannot use this routine.
*
* Returns zero on success, or else the status code returned by the
* underlying call that failed. On successful completion, each interface
intf->dev.parent = &dev->dev;
intf->dev.driver = NULL;
intf->dev.bus = &usb_bus_type;
+ intf->dev.type = &usb_if_device_type;
intf->dev.dma_mask = dev->dev.dma_mask;
- intf->dev.release = release_interface;
device_initialize (&intf->dev);
mark_quiesced(intf);
sprintf (&intf->dev.bus_id[0], "%d-%s:%d.%d",