diff options
Diffstat (limited to 'drivers/usb/core/usb.c')
| -rw-r--r-- | drivers/usb/core/usb.c | 87 |
1 files changed, 72 insertions, 15 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 7eee400d3e32..a26f73880c32 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -34,6 +34,7 @@ #include <linux/usb.h> #include <linux/mutex.h> #include <linux/workqueue.h> +#include <linux/debugfs.h> #include <asm/io.h> #include <linux/scatterlist.h> @@ -139,8 +140,7 @@ static int __find_interface(struct device *dev, void *data) struct find_interface_arg *arg = data; struct usb_interface *intf; - /* can't look at usb devices, only interfaces */ - if (is_usb_device(dev)) + if (!is_usb_interface(dev)) return 0; intf = to_usb_interface(dev); @@ -184,11 +184,16 @@ EXPORT_SYMBOL_GPL(usb_find_interface); static void usb_release_dev(struct device *dev) { struct usb_device *udev; + struct usb_hcd *hcd; udev = to_usb_device(dev); + hcd = bus_to_hcd(udev->bus); usb_destroy_configuration(udev); - usb_put_hcd(bus_to_hcd(udev->bus)); + /* Root hubs aren't real devices, so don't free HCD resources */ + if (hcd->driver->free_dev && udev->parent) + hcd->driver->free_dev(hcd, udev); + usb_put_hcd(hcd); kfree(udev->product); kfree(udev->manufacturer); kfree(udev->serial); @@ -305,10 +310,21 @@ static struct dev_pm_ops usb_device_pm_ops = { #endif /* CONFIG_PM */ + +static char *usb_nodename(struct device *dev) +{ + struct usb_device *usb_dev; + + usb_dev = to_usb_device(dev); + return kasprintf(GFP_KERNEL, "bus/usb/%03d/%03d", + usb_dev->bus->busnum, usb_dev->devnum); +} + struct device_type usb_device_type = { .name = "usb_device", .release = usb_release_dev, .uevent = usb_dev_uevent, + .nodename = usb_nodename, .pm = &usb_device_pm_ops, }; @@ -348,6 +364,13 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent, kfree(dev); return NULL; } + /* Root hubs aren't true devices, so don't allocate HCD resources */ + if (usb_hcd->driver->alloc_dev && parent && + !usb_hcd->driver->alloc_dev(usb_hcd, dev)) { + usb_put_hcd(bus_to_hcd(bus)); + kfree(dev); + return NULL; + } device_initialize(&dev->dev); dev->dev.bus = &usb_bus_type; @@ -375,18 +398,24 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent, */ if (unlikely(!parent)) { dev->devpath[0] = '0'; + dev->route = 0; dev->dev.parent = bus->controller; dev_set_name(&dev->dev, "usb%d", bus->busnum); root_hub = 1; } else { /* match any labeling on the hubs; it's one-based */ - if (parent->devpath[0] == '0') + if (parent->devpath[0] == '0') { snprintf(dev->devpath, sizeof dev->devpath, "%d", port1); - else + /* Root ports are not counted in route string */ + dev->route = 0; + } else { snprintf(dev->devpath, sizeof dev->devpath, "%s.%d", parent->devpath, port1); + dev->route = parent->route + + (port1 << ((parent->level - 1)*4)); + } dev->dev.parent = &parent->dev; dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath); @@ -799,12 +828,12 @@ void usb_buffer_dmasync(struct urb *urb) return; if (controller->dma_mask) { - dma_sync_single(controller, + dma_sync_single_for_cpu(controller, urb->transfer_dma, urb->transfer_buffer_length, usb_pipein(urb->pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE); if (usb_pipecontrol(urb->pipe)) - dma_sync_single(controller, + dma_sync_single_for_cpu(controller, urb->setup_dma, sizeof(struct usb_ctrlrequest), DMA_TO_DEVICE); @@ -922,8 +951,8 @@ void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in, || !controller->dma_mask) return; - dma_sync_sg(controller, sg, n_hw_ents, - is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE); + dma_sync_sg_for_cpu(controller, sg, n_hw_ents, + is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE); } EXPORT_SYMBOL_GPL(usb_buffer_dmasync_sg); #endif @@ -1001,6 +1030,35 @@ static struct notifier_block usb_bus_nb = { .notifier_call = usb_bus_notify, }; +struct dentry *usb_debug_root; +EXPORT_SYMBOL_GPL(usb_debug_root); + +struct dentry *usb_debug_devices; + +static int usb_debugfs_init(void) +{ + usb_debug_root = debugfs_create_dir("usb", NULL); + if (!usb_debug_root) + return -ENOENT; + + usb_debug_devices = debugfs_create_file("devices", 0444, + usb_debug_root, NULL, + &usbfs_devices_fops); + if (!usb_debug_devices) { + debugfs_remove(usb_debug_root); + usb_debug_root = NULL; + return -ENOENT; + } + + return 0; +} + +static void usb_debugfs_cleanup(void) +{ + debugfs_remove(usb_debug_devices); + debugfs_remove(usb_debug_root); +} + /* * Init */ @@ -1012,6 +1070,10 @@ static int __init usb_init(void) return 0; } + retval = usb_debugfs_init(); + if (retval) + goto out; + retval = ksuspend_usb_init(); if (retval) goto out; @@ -1021,9 +1083,6 @@ static int __init usb_init(void) retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb); if (retval) goto bus_notifier_failed; - retval = usb_host_init(); - if (retval) - goto host_init_failed; retval = usb_major_init(); if (retval) goto major_init_failed; @@ -1053,8 +1112,6 @@ usb_devio_init_failed: driver_register_failed: usb_major_cleanup(); major_init_failed: - usb_host_cleanup(); -host_init_failed: bus_unregister_notifier(&usb_bus_type, &usb_bus_nb); bus_notifier_failed: bus_unregister(&usb_bus_type); @@ -1079,10 +1136,10 @@ static void __exit usb_exit(void) usb_deregister(&usbfs_driver); usb_devio_cleanup(); usb_hub_cleanup(); - usb_host_cleanup(); bus_unregister_notifier(&usb_bus_type, &usb_bus_nb); bus_unregister(&usb_bus_type); ksuspend_usb_cleanup(); + usb_debugfs_cleanup(); } subsys_initcall(usb_init); |