#ifndef __LINUX_USB_H #define __LINUX_USB_H #include #include #define USB_MAJOR 180 #define USB_DEVICE_MAJOR 189 #ifdef __KERNEL__ #include #include #include #include #include #include #include #include #include #include #include #define HTC_PM_DBG struct usb_device; struct usb_driver; struct wusb_dev; struct ep_device; struct usb_host_endpoint { struct usb_endpoint_descriptor desc; struct usb_ss_ep_comp_descriptor ss_ep_comp; struct list_head urb_list; void *hcpriv; struct ep_device *ep_dev; unsigned char *extra; int extralen; int enabled; }; struct usb_host_interface { struct usb_interface_descriptor desc; struct usb_host_endpoint *endpoint; char *string; unsigned char *extra; int extralen; }; enum usb_interface_condition { USB_INTERFACE_UNBOUND = 0, USB_INTERFACE_BINDING, USB_INTERFACE_BOUND, USB_INTERFACE_UNBINDING, }; struct usb_interface { struct usb_host_interface *altsetting; struct usb_host_interface *cur_altsetting; unsigned num_altsetting; struct usb_interface_assoc_descriptor *intf_assoc; int minor; enum usb_interface_condition condition; unsigned sysfs_files_created:1; unsigned ep_devs_created:1; unsigned unregistering:1; unsigned needs_remote_wakeup:1; unsigned needs_altsetting0:1; unsigned needs_binding:1; unsigned reset_running:1; unsigned resetting_device:1; struct device dev; struct device *usb_dev; atomic_t pm_usage_cnt; struct work_struct reset_ws; #ifdef HTC_PM_DBG unsigned long last_busy_jiffies; unsigned int busy_cnt; unsigned int data_busy_cnt; #endif }; #define to_usb_interface(d) container_of(d, struct usb_interface, dev) static inline void *usb_get_intfdata(struct usb_interface *intf) { return dev_get_drvdata(&intf->dev); } static inline void usb_set_intfdata(struct usb_interface *intf, void *data) { dev_set_drvdata(&intf->dev, data); } struct usb_interface *usb_get_intf(struct usb_interface *intf); void usb_put_intf(struct usb_interface *intf); #define USB_MAXINTERFACES 32 #define USB_MAXIADS (USB_MAXINTERFACES/2) struct usb_interface_cache { unsigned num_altsetting; struct kref ref; struct usb_host_interface altsetting[0]; }; #define ref_to_usb_interface_cache(r) \ container_of(r, struct usb_interface_cache, ref) #define altsetting_to_usb_interface_cache(a) \ container_of(a, struct usb_interface_cache, altsetting[0]) struct usb_host_config { struct usb_config_descriptor desc; char *string; struct usb_interface_assoc_descriptor *intf_assoc[USB_MAXIADS]; struct usb_interface *interface[USB_MAXINTERFACES]; struct usb_interface_cache *intf_cache[USB_MAXINTERFACES]; unsigned char *extra; int extralen; }; struct usb_host_bos { struct usb_bos_descriptor *desc; struct usb_ext_cap_descriptor *ext_cap; struct usb_ss_cap_descriptor *ss_cap; struct usb_ss_container_id_descriptor *ss_id; }; int __usb_get_extra_descriptor(char *buffer, unsigned size, unsigned char type, void **ptr); #define usb_get_extra_descriptor(ifpoint, type, ptr) \ __usb_get_extra_descriptor((ifpoint)->extra, \ (ifpoint)->extralen, \ type, (void **)ptr) struct usb_devmap { unsigned long devicemap[128 / (8*sizeof(unsigned long))]; }; struct usb_bus { struct device *controller; int busnum; const char *bus_name; u8 uses_dma; u8 uses_pio_for_control; u8 otg_port; unsigned is_b_host:1; unsigned b_hnp_enable:1; unsigned hnp_support:1; unsigned quick_hnp:1; unsigned otg_vbus_off:1; struct delayed_work hnp_polling; unsigned sg_tablesize; int devnum_next; struct usb_devmap devmap; struct usb_device *root_hub; struct usb_bus *hs_companion; struct list_head bus_list; int bandwidth_allocated; int bandwidth_int_reqs; int bandwidth_isoc_reqs; #ifdef CONFIG_USB_DEVICEFS struct dentry *usbfs_dentry; #endif #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) struct mon_bus *mon_bus; int monitored; #endif unsigned skip_resume:1; /* All USB devices are brought into full * power state after system resume. It * is desirable for some buses to keep * their devices in suspend state even * after system resume. The devices * are resumed later when a remote * wakeup is detected or an interface * driver starts I/O. */ }; #if defined(CONFIG_USB_PEHCI_HCD) || defined(CONFIG_USB_PEHCI_HCD_MODULE) #define USB_OTG_SUSPEND 0x1 #define USB_OTG_ENUMERATE 0x2 #define USB_OTG_DISCONNECT 0x4 #define USB_OTG_RESUME 0x8 #define USB_OTG_REMOTEWAKEUP 0x10 #define USB_OTG_WAKEUP_ALL 0x20 #endif #define USB_MAXCHILDREN (31) struct usb_tt; enum usb_device_removable { USB_DEVICE_REMOVABLE_UNKNOWN = 0, USB_DEVICE_REMOVABLE, USB_DEVICE_FIXED, }; struct usb_device { int devnum; char devpath[16]; u32 route; enum usb_device_state state; enum usb_device_speed speed; struct usb_tt *tt; int ttport; unsigned int toggle[2]; struct usb_device *parent; struct usb_bus *bus; struct usb_host_endpoint ep0; struct device dev; struct usb_device_descriptor descriptor; struct usb_host_bos *bos; struct usb_host_config *config; struct usb_host_config *actconfig; struct usb_host_endpoint *ep_in[16]; struct usb_host_endpoint *ep_out[16]; char **rawdescriptors; unsigned short bus_mA; u8 portnum; u8 level; unsigned can_submit:1; unsigned persist_enabled:1; unsigned have_langid:1; unsigned authorized:1; unsigned authenticated:1; unsigned wusb:1; unsigned lpm_capable:1; unsigned usb2_hw_lpm_capable:1; unsigned usb2_hw_lpm_enabled:1; int string_langid; char *product; char *manufacturer; char *serial; struct list_head filelist; #ifdef CONFIG_USB_DEVICE_CLASS struct device *usb_classdev; #endif #ifdef CONFIG_USB_DEVICEFS struct dentry *usbfs_dentry; #endif #if defined(CONFIG_USB_PEHCI_HCD) || defined(CONFIG_USB_PEHCI_HCD_MODULE) u8 otgdevice; u8 otgstate; void *otgpriv; void (*otg_notif) (void *otg_priv, unsigned long notif, unsigned long data); void *hcd_priv; void (*hcd_suspend) (void *hcd_priv); #endif int maxchild; struct usb_device **children; u32 quirks; atomic_t urbnum; unsigned long active_duration; #ifdef CONFIG_PM unsigned long connect_time; unsigned do_remote_wakeup:1; unsigned reset_resume:1; #endif struct wusb_dev *wusb_dev; int slot_id; enum usb_device_removable removable; #ifdef HTC_PM_DBG unsigned int enable_pm_debug:1; unsigned auto_suspend_timer_set:1; unsigned is_suspend:1; #endif }; #define to_usb_device(d) container_of(d, struct usb_device, dev) static inline struct usb_device *interface_to_usbdev(struct usb_interface *intf) { return to_usb_device(intf->dev.parent); } extern struct usb_device *usb_get_dev(struct usb_device *dev); extern void usb_put_dev(struct usb_device *dev); #define usb_lock_device(udev) device_lock(&(udev)->dev) #define usb_unlock_device(udev) device_unlock(&(udev)->dev) #define usb_trylock_device(udev) device_trylock(&(udev)->dev) extern int usb_lock_device_for_reset(struct usb_device *udev, const struct usb_interface *iface); extern int usb_reset_device(struct usb_device *dev); extern void usb_queue_reset_device(struct usb_interface *dev); #ifdef CONFIG_USB_SUSPEND extern void usb_enable_autosuspend(struct usb_device *udev); extern void usb_disable_autosuspend(struct usb_device *udev); extern int usb_autopm_get_interface(struct usb_interface *intf); extern void usb_autopm_put_interface(struct usb_interface *intf); extern int usb_autopm_get_interface_async(struct usb_interface *intf); extern void usb_autopm_put_interface_async(struct usb_interface *intf); extern void usb_autopm_get_interface_no_resume(struct usb_interface *intf); extern void usb_autopm_put_interface_no_suspend(struct usb_interface *intf); static inline void usb_mark_last_busy(struct usb_device *udev) { pm_runtime_mark_last_busy(&udev->dev); } #ifdef HTC_PM_DBG static inline void usb_mark_intf_last_busy(struct usb_interface *intf, bool is_data) { ACCESS_ONCE(intf->last_busy_jiffies) = jiffies; if (is_data) intf->data_busy_cnt++; else intf->busy_cnt++; } #endif #else static inline int usb_enable_autosuspend(struct usb_device *udev) { return 0; } static inline int usb_disable_autosuspend(struct usb_device *udev) { return 0; } static inline int usb_autopm_get_interface(struct usb_interface *intf) { return 0; } static inline int usb_autopm_get_interface_async(struct usb_interface *intf) { return 0; } static inline void usb_autopm_put_interface(struct usb_interface *intf) { } static inline void usb_autopm_put_interface_async(struct usb_interface *intf) { } static inline void usb_autopm_get_interface_no_resume( struct usb_interface *intf) { } static inline void usb_autopm_put_interface_no_suspend( struct usb_interface *intf) { } static inline void usb_mark_last_busy(struct usb_device *udev) { } #ifdef HTC_PM_DBG static inline void usb_mark_intf_last_busy(struct usb_interface *intf, bool is_data) { } #endif #endif extern int usb_get_current_frame_number(struct usb_device *usb_dev); extern int usb_alloc_streams(struct usb_interface *interface, struct usb_host_endpoint **eps, unsigned int num_eps, unsigned int num_streams, gfp_t mem_flags); extern void usb_free_streams(struct usb_interface *interface, struct usb_host_endpoint **eps, unsigned int num_eps, gfp_t mem_flags); extern int usb_driver_claim_interface(struct usb_driver *driver, struct usb_interface *iface, void *priv); static inline int usb_interface_claimed(struct usb_interface *iface) { return (iface->dev.driver != NULL); } extern void usb_driver_release_interface(struct usb_driver *driver, struct usb_interface *iface); const struct usb_device_id *usb_match_id(struct usb_interface *interface, const struct usb_device_id *id); extern int usb_match_one_id(struct usb_interface *interface, const struct usb_device_id *id); extern struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor); extern struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev, unsigned ifnum); extern struct usb_host_interface *usb_altnum_to_altsetting( const struct usb_interface *intf, unsigned int altnum); extern struct usb_host_interface *usb_find_alt_setting( struct usb_host_config *config, unsigned int iface_num, unsigned int alt_num); static inline int usb_make_path(struct usb_device *dev, char *buf, size_t size) { int actual; actual = snprintf(buf, size, "usb-%s-%s", dev->bus->bus_name, dev->devpath); return (actual >= (int)size) ? -1 : actual; } #define USB_DEVICE_ID_MATCH_DEVICE \ (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT) #define USB_DEVICE_ID_MATCH_DEV_RANGE \ (USB_DEVICE_ID_MATCH_DEV_LO | USB_DEVICE_ID_MATCH_DEV_HI) #define USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION \ (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_RANGE) #define USB_DEVICE_ID_MATCH_DEV_INFO \ (USB_DEVICE_ID_MATCH_DEV_CLASS | \ USB_DEVICE_ID_MATCH_DEV_SUBCLASS | \ USB_DEVICE_ID_MATCH_DEV_PROTOCOL) #define USB_DEVICE_ID_MATCH_INT_INFO \ (USB_DEVICE_ID_MATCH_INT_CLASS | \ USB_DEVICE_ID_MATCH_INT_SUBCLASS | \ USB_DEVICE_ID_MATCH_INT_PROTOCOL) #define USB_DEVICE(vend, prod) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \ .idVendor = (vend), \ .idProduct = (prod) #define USB_DEVICE_VER(vend, prod, lo, hi) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, \ .idVendor = (vend), \ .idProduct = (prod), \ .bcdDevice_lo = (lo), \ .bcdDevice_hi = (hi) /** * USB_DEVICE_INTERFACE_CLASS - describe a usb device with a specific interface class * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @cl: bInterfaceClass value * * This macro is used to create a struct usb_device_id that matches a * specific interface class of devices. */ #define USB_DEVICE_INTERFACE_CLASS(vend, prod, cl) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ USB_DEVICE_ID_MATCH_INT_CLASS, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceClass = (cl) /** * USB_DEVICE_INTERFACE_PROTOCOL - describe a usb device with a specific interface protocol * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @pr: bInterfaceProtocol value * * This macro is used to create a struct usb_device_id that matches a * specific interface protocol of devices. */ #define USB_DEVICE_INTERFACE_PROTOCOL(vend, prod, pr) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ USB_DEVICE_ID_MATCH_INT_PROTOCOL, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceProtocol = (pr) #define USB_DEVICE_INFO(cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_DEV_INFO, \ .bDeviceClass = (cl), \ .bDeviceSubClass = (sc), \ .bDeviceProtocol = (pr) #define USB_INTERFACE_INFO(cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO, \ .bInterfaceClass = (cl), \ .bInterfaceSubClass = (sc), \ .bInterfaceProtocol = (pr) #define USB_DEVICE_AND_INTERFACE_INFO(vend, prod, cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \ | USB_DEVICE_ID_MATCH_DEVICE, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceClass = (cl), \ .bInterfaceSubClass = (sc), \ .bInterfaceProtocol = (pr) #define USB_VENDOR_AND_INTERFACE_INFO(vend, cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \ | USB_DEVICE_ID_MATCH_VENDOR, \ .idVendor = (vend), \ .bInterfaceClass = (cl), \ .bInterfaceSubClass = (sc), \ .bInterfaceProtocol = (pr) #define USB_DEVICE_CLASS_INFO(dcl) \ .match_flags = USB_DEVICE_ID_MATCH_DEV_CLASS, \ .bDeviceClass = (dcl) \ #define USB_INTERFACE_CLASS_INFO(icl) \ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS, \ .bInterfaceClass = (icl) \ struct usb_dynids { spinlock_t lock; struct list_head list; }; struct usb_dynid { struct list_head node; struct usb_device_id id; }; extern ssize_t usb_store_new_id(struct usb_dynids *dynids, struct device_driver *driver, const char *buf, size_t count); struct usbdrv_wrap { struct device_driver driver; int for_devices; }; struct usb_driver { const char *name; int (*probe) (struct usb_interface *intf, const struct usb_device_id *id); void (*disconnect) (struct usb_interface *intf); int (*unlocked_ioctl) (struct usb_interface *intf, unsigned int code, void *buf); int (*suspend) (struct usb_interface *intf, pm_message_t message); int (*resume) (struct usb_interface *intf); int (*reset_resume)(struct usb_interface *intf); int (*pre_reset)(struct usb_interface *intf); int (*post_reset)(struct usb_interface *intf); const struct usb_device_id *id_table; struct usb_dynids dynids; struct usbdrv_wrap drvwrap; unsigned int no_dynamic_id:1; unsigned int supports_autosuspend:1; unsigned int soft_unbind:1; }; #define to_usb_driver(d) container_of(d, struct usb_driver, drvwrap.driver) struct usb_device_driver { const char *name; int (*probe) (struct usb_device *udev); void (*disconnect) (struct usb_device *udev); int (*suspend) (struct usb_device *udev, pm_message_t message); int (*resume) (struct usb_device *udev, pm_message_t message); struct usbdrv_wrap drvwrap; unsigned int supports_autosuspend:1; }; #define to_usb_device_driver(d) container_of(d, struct usb_device_driver, \ drvwrap.driver) extern struct bus_type usb_bus_type; struct usb_class_driver { char *name; char *(*devnode)(struct device *dev, umode_t *mode); const struct file_operations *fops; int minor_base; }; extern int usb_register_driver(struct usb_driver *, struct module *, const char *); #define usb_register(driver) \ usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) extern void usb_deregister(struct usb_driver *); #define module_usb_driver(__usb_driver) \ module_driver(__usb_driver, usb_register, \ usb_deregister) extern int usb_register_device_driver(struct usb_device_driver *, struct module *); extern void usb_deregister_device_driver(struct usb_device_driver *); extern int usb_register_dev(struct usb_interface *intf, struct usb_class_driver *class_driver); extern void usb_deregister_dev(struct usb_interface *intf, struct usb_class_driver *class_driver); extern int usb_disabled(void); #define URB_SHORT_NOT_OK 0x0001 #define URB_ISO_ASAP 0x0002 #define URB_NO_TRANSFER_DMA_MAP 0x0004 #define URB_NO_FSBR 0x0020 #define URB_ZERO_PACKET 0x0040 #define URB_NO_INTERRUPT 0x0080 #define URB_FREE_BUFFER 0x0100 #define URB_DIR_IN 0x0200 #define URB_DIR_OUT 0 #define URB_DIR_MASK URB_DIR_IN #define URB_DMA_MAP_SINGLE 0x00010000 #define URB_DMA_MAP_PAGE 0x00020000 #define URB_DMA_MAP_SG 0x00040000 #define URB_MAP_LOCAL 0x00080000 #define URB_SETUP_MAP_SINGLE 0x00100000 #define URB_SETUP_MAP_LOCAL 0x00200000 #define URB_DMA_SG_COMBINED 0x00400000 #define URB_ALIGNED_TEMP_BUFFER 0x00800000 struct usb_iso_packet_descriptor { unsigned int offset; unsigned int length; unsigned int actual_length; int status; }; struct urb; struct usb_anchor { struct list_head urb_list; wait_queue_head_t wait; spinlock_t lock; unsigned int poisoned:1; }; static inline void init_usb_anchor(struct usb_anchor *anchor) { INIT_LIST_HEAD(&anchor->urb_list); init_waitqueue_head(&anchor->wait); spin_lock_init(&anchor->lock); } typedef void (*usb_complete_t)(struct urb *); /** * struct urb - USB Request Block * @urb_list: For use by current owner of the URB. * @anchor_list: membership in the list of an anchor * @anchor: to anchor URBs to a common mooring * @ep: Points to the endpoint's data structure. Will eventually * replace @pipe. * @pipe: Holds endpoint number, direction, type, and more. * Create these values with the eight macros available; * usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl" * (control), "bulk", "int" (interrupt), or "iso" (isochronous). * For example usb_sndbulkpipe() or usb_rcvintpipe(). Endpoint * numbers range from zero to fifteen. Note that "in" endpoint two * is a different endpoint (and pipe) from "out" endpoint two. * The current configuration controls the existence, type, and * maximum packet size of any given endpoint. * @stream_id: the endpoint's stream ID for bulk streams * @dev: Identifies the USB device to perform the request. * @status: This is read in non-iso completion functions to get the * status of the particular request. ISO requests only use it * to tell whether the URB was unlinked; detailed status for * each frame is in the fields of the iso_frame-desc. * @transfer_flags: A variety of flags may be used to affect how URB * submission, unlinking, or operation are handled. Different * kinds of URB can use different flags. * @transfer_buffer: This identifies the buffer to (or from) which the I/O * request will be performed unless URB_NO_TRANSFER_DMA_MAP is set * (however, do not leave garbage in transfer_buffer even then). * This buffer must be suitable for DMA; allocate it with * kmalloc() or equivalent. For transfers to "in" endpoints, contents * of this buffer will be modified. This buffer is used for the data * stage of control transfers. * @transfer_dma: When transfer_flags includes URB_NO_TRANSFER_DMA_MAP, * the device driver is saying that it provided this DMA address, * which the host controller driver should use in preference to the * transfer_buffer. * @sg: scatter gather buffer list * @num_mapped_sgs: (internal) number of mapped sg entries * @num_sgs: number of entries in the sg list * @transfer_buffer_length: How big is transfer_buffer. The transfer may * be broken up into chunks according to the current maximum packet * size for the endpoint, which is a function of the configuration * and is encoded in the pipe. When the length is zero, neither * transfer_buffer nor transfer_dma is used. * @actual_length: This is read in non-iso completion functions, and * it tells how many bytes (out of transfer_buffer_length) were * transferred. It will normally be the same as requested, unless * either an error was reported or a short read was performed. * The URB_SHORT_NOT_OK transfer flag may be used to make such * short reads be reported as errors. * @setup_packet: Only used for control transfers, this points to eight bytes * of setup data. Control transfers always start by sending this data * to the device. Then transfer_buffer is read or written, if needed. * @setup_dma: DMA pointer for the setup packet. The caller must not use * this field; setup_packet must point to a valid buffer. * @start_frame: Returns the initial frame for isochronous transfers. * @number_of_packets: Lists the number of ISO transfer buffers. * @interval: Specifies the polling interval for interrupt or isochronous * transfers. The units are frames (milliseconds) for full and low * speed devices, and microframes (1/8 millisecond) for highspeed * and SuperSpeed devices. * @error_count: Returns the number of ISO transfers that reported errors. * @context: For use in completion functions. This normally points to * request-specific driver context. * @complete: Completion handler. This URB is passed as the parameter to the * completion function. The completion function may then do what * it likes with the URB, including resubmitting or freeing it. * @iso_frame_desc: Used to provide arrays of ISO transfer buffers and to * collect the transfer status for each buffer. * * This structure identifies USB transfer requests. URBs must be allocated by * calling usb_alloc_urb() and freed with a call to usb_free_urb(). * Initialization may be done using various usb_fill_*_urb() functions. URBs * are submitted using usb_submit_urb(), and pending requests may be canceled * using usb_unlink_urb() or usb_kill_urb(). * * Data Transfer Buffers: * * Normally drivers provide I/O buffers allocated with kmalloc() or otherwise * taken from the general page pool. That is provided by transfer_buffer * (control requests also use setup_packet), and host controller drivers * perform a dma mapping (and unmapping) for each buffer transferred. Those * mapping operations can be expensive on some platforms (perhaps using a dma * bounce buffer or talking to an IOMMU), * although they're cheap on commodity x86 and ppc hardware. * * Alternatively, drivers may pass the URB_NO_TRANSFER_DMA_MAP transfer flag, * which tells the host controller driver that no such mapping is needed for * the transfer_buffer since * the device driver is DMA-aware. For example, a device driver might * allocate a DMA buffer with usb_alloc_coherent() or call usb_buffer_map(). * When this transfer flag is provided, host controller drivers will * attempt to use the dma address found in the transfer_dma * field rather than determining a dma address themselves. * * Note that transfer_buffer must still be set if the controller * does not support DMA (as indicated by bus.uses_dma) and when talking * to root hub. If you have to trasfer between highmem zone and the device * on such controller, create a bounce buffer or bail out with an error. * If transfer_buffer cannot be set (is in highmem) and the controller is DMA * capable, assign NULL to it, so that usbmon knows not to use the value. * The setup_packet must always be set, so it cannot be located in highmem. * * Initialization: * * All URBs submitted must initialize the dev, pipe, transfer_flags (may be * zero), and complete fields. All URBs must also initialize * transfer_buffer and transfer_buffer_length. They may provide the * URB_SHORT_NOT_OK transfer flag, indicating that short reads are * to be treated as errors; that flag is invalid for write requests. * * Bulk URBs may * use the URB_ZERO_PACKET transfer flag, indicating that bulk OUT transfers * should always terminate with a short packet, even if it means adding an * extra zero length packet. * * Control URBs must provide a valid pointer in the setup_packet field. * Unlike the transfer_buffer, the setup_packet may not be mapped for DMA * beforehand. * * Interrupt URBs must provide an interval, saying how often (in milliseconds * or, for highspeed devices, 125 microsecond units) * to poll for transfers. After the URB has been submitted, the interval * field reflects how the transfer was actually scheduled. * The polling interval may be more frequent than requested. * For example, some controllers have a maximum interval of 32 milliseconds, * while others support intervals of up to 1024 milliseconds. * Isochronous URBs also have transfer intervals. (Note that for isochronous * endpoints, as well as high speed interrupt endpoints, the encoding of * the transfer interval in the endpoint descriptor is logarithmic. * Device drivers must convert that value to linear units themselves.) * * Isochronous URBs normally use the URB_ISO_ASAP transfer flag, telling * the host controller to schedule the transfer as soon as bandwidth * utilization allows, and then set start_frame to reflect the actual frame * selected during submission. Otherwise drivers must specify the start_frame * and handle the case where the transfer can't begin then. However, drivers * won't know how bandwidth is currently allocated, and while they can * find the current frame using usb_get_current_frame_number () they can't * know the range for that frame number. (Ranges for frame counter values * are HC-specific, and can go from 256 to 65536 frames from "now".) * * Isochronous URBs have a different data transfer model, in part because * the quality of service is only "best effort". Callers provide specially * allocated URBs, with number_of_packets worth of iso_frame_desc structures * at the end. Each such packet is an individual ISO transfer. Isochronous * URBs are normally queued, submitted by drivers to arrange that * transfers are at least double buffered, and then explicitly resubmitted * in completion handlers, so * that data (such as audio or video) streams at as constant a rate as the * host controller scheduler can support. * * Completion Callbacks: * * The completion callback is made in_interrupt(), and one of the first * things that a completion handler should do is check the status field. * The status field is provided for all URBs. It is used to report * unlinked URBs, and status for all non-ISO transfers. It should not * be examined before the URB is returned to the completion handler. * * The context field is normally used to link URBs back to the relevant * driver or request state. * * When the completion callback is invoked for non-isochronous URBs, the * actual_length field tells how many bytes were transferred. This field * is updated even when the URB terminated with an error or was unlinked. * * ISO transfer status is reported in the status and actual_length fields * of the iso_frame_desc array, and the number of errors is reported in * error_count. Completion callbacks for ISO transfers will normally * (re)submit URBs to ensure a constant transfer rate. * * Note that even fields marked "public" should not be touched by the driver * when the urb is owned by the hcd, that is, since the call to * usb_submit_urb() till the entry into the completion routine. */ struct urb { struct kref kref; void *hcpriv; atomic_t use_count; atomic_t reject; int unlinked; struct list_head urb_list; struct list_head anchor_list; struct usb_anchor *anchor; struct usb_device *dev; struct usb_host_endpoint *ep; unsigned int pipe; unsigned int stream_id; int status; unsigned int transfer_flags; void *transfer_buffer; dma_addr_t transfer_dma; struct scatterlist *sg; int num_mapped_sgs; int num_sgs; u32 transfer_buffer_length; u32 actual_length; unsigned char *setup_packet; dma_addr_t setup_dma; int start_frame; int number_of_packets; int interval; int error_count; void *context; usb_complete_t complete; struct usb_iso_packet_descriptor iso_frame_desc[0]; }; static inline void usb_fill_control_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, unsigned char *setup_packet, void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context) { urb->dev = dev; urb->pipe = pipe; urb->setup_packet = setup_packet; urb->transfer_buffer = transfer_buffer; urb->transfer_buffer_length = buffer_length; urb->complete = complete_fn; urb->context = context; } static inline void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context) { urb->dev = dev; urb->pipe = pipe; urb->transfer_buffer = transfer_buffer; urb->transfer_buffer_length = buffer_length; urb->complete = complete_fn; urb->context = context; } static inline void usb_fill_int_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context, int interval) { urb->dev = dev; urb->pipe = pipe; urb->transfer_buffer = transfer_buffer; urb->transfer_buffer_length = buffer_length; urb->complete = complete_fn; urb->context = context; if (dev->speed == USB_SPEED_HIGH || dev->speed == USB_SPEED_SUPER) urb->interval = 1 << (interval - 1); else urb->interval = interval; urb->start_frame = -1; } extern void usb_init_urb(struct urb *urb); extern struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags); extern void usb_free_urb(struct urb *urb); #define usb_put_urb usb_free_urb extern struct urb *usb_get_urb(struct urb *urb); extern int usb_submit_urb(struct urb *urb, gfp_t mem_flags); extern int usb_unlink_urb(struct urb *urb); extern void usb_kill_urb(struct urb *urb); extern void usb_poison_urb(struct urb *urb); extern void usb_unpoison_urb(struct urb *urb); extern void usb_block_urb(struct urb *urb); extern void usb_kill_anchored_urbs(struct usb_anchor *anchor); extern void usb_poison_anchored_urbs(struct usb_anchor *anchor); extern void usb_unpoison_anchored_urbs(struct usb_anchor *anchor); extern void usb_unlink_anchored_urbs(struct usb_anchor *anchor); extern void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor); extern void usb_unanchor_urb(struct urb *urb); extern int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor, unsigned int timeout); extern struct urb *usb_get_from_anchor(struct usb_anchor *anchor); extern void usb_scuttle_anchored_urbs(struct usb_anchor *anchor); extern int usb_anchor_empty(struct usb_anchor *anchor); #define usb_unblock_urb usb_unpoison_urb static inline int usb_urb_dir_in(struct urb *urb) { return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN; } static inline int usb_urb_dir_out(struct urb *urb) { return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; } void *usb_alloc_coherent(struct usb_device *dev, size_t size, gfp_t mem_flags, dma_addr_t *dma); void usb_free_coherent(struct usb_device *dev, size_t size, void *addr, dma_addr_t dma); #if 0 struct urb *usb_buffer_map(struct urb *urb); void usb_buffer_dmasync(struct urb *urb); void usb_buffer_unmap(struct urb *urb); #endif struct scatterlist; int usb_buffer_map_sg(const struct usb_device *dev, int is_in, struct scatterlist *sg, int nents); #if 0 void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in, struct scatterlist *sg, int n_hw_ents); #endif void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in, struct scatterlist *sg, int n_hw_ents); extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void *data, __u16 size, int timeout); extern int usb_interrupt_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout); extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout); extern int usb_get_descriptor(struct usb_device *dev, unsigned char desctype, unsigned char descindex, void *buf, int size); extern int usb_get_status(struct usb_device *dev, int type, int target, void *data); extern int usb_string(struct usb_device *dev, int index, char *buf, size_t size); extern int usb_clear_halt(struct usb_device *dev, int pipe); extern int usb_reset_configuration(struct usb_device *dev); extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate); extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr); extern int usb_driver_set_configuration(struct usb_device *udev, int config); extern int usb_set_interrupt_latency(struct usb_device *udev, int latency); #define USB_CTRL_GET_TIMEOUT 5000 #define USB_CTRL_SET_TIMEOUT 5000 struct usb_sg_request { int status; size_t bytes; spinlock_t lock; struct usb_device *dev; int pipe; int entries; struct urb **urbs; int count; struct completion complete; }; int usb_sg_init( struct usb_sg_request *io, struct usb_device *dev, unsigned pipe, unsigned period, struct scatterlist *sg, int nents, size_t length, gfp_t mem_flags ); void usb_sg_cancel(struct usb_sg_request *io); void usb_sg_wait(struct usb_sg_request *io); #define PIPE_ISOCHRONOUS 0 #define PIPE_INTERRUPT 1 #define PIPE_CONTROL 2 #define PIPE_BULK 3 #define usb_pipein(pipe) ((pipe) & USB_DIR_IN) #define usb_pipeout(pipe) (!usb_pipein(pipe)) #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) #define usb_pipetype(pipe) (((pipe) >> 30) & 3) #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS) #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT) #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) static inline unsigned int __create_pipe(struct usb_device *dev, unsigned int endpoint) { return (dev->devnum << 8) | (endpoint << 15); } #define usb_sndctrlpipe(dev, endpoint) \ ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint)) #define usb_rcvctrlpipe(dev, endpoint) \ ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) #define usb_sndisocpipe(dev, endpoint) \ ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint)) #define usb_rcvisocpipe(dev, endpoint) \ ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) #define usb_sndbulkpipe(dev, endpoint) \ ((PIPE_BULK << 30) | __create_pipe(dev, endpoint)) #define usb_rcvbulkpipe(dev, endpoint) \ ((PIPE_BULK << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) #define usb_sndintpipe(dev, endpoint) \ ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint)) #define usb_rcvintpipe(dev, endpoint) \ ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) static inline struct usb_host_endpoint * usb_pipe_endpoint(struct usb_device *dev, unsigned int pipe) { struct usb_host_endpoint **eps; eps = usb_pipein(pipe) ? dev->ep_in : dev->ep_out; return eps[usb_pipeendpoint(pipe)]; } static inline __u16 usb_maxpacket(struct usb_device *udev, int pipe, int is_out) { struct usb_host_endpoint *ep; unsigned epnum = usb_pipeendpoint(pipe); if (is_out) { WARN_ON(usb_pipein(pipe)); ep = udev->ep_out[epnum]; } else { WARN_ON(usb_pipeout(pipe)); ep = udev->ep_in[epnum]; } if (!ep) return 0; return usb_endpoint_maxp(&ep->desc); } static inline int usb_translate_errors(int error_code) { switch (error_code) { case 0: case -ENOMEM: case -ENODEV: return error_code; default: return -EIO; } } #define USB_DEVICE_ADD 0x0001 #define USB_DEVICE_REMOVE 0x0002 #define USB_BUS_ADD 0x0003 #define USB_BUS_REMOVE 0x0004 #define USB_DEVICE_CONFIG 0x0005 #ifdef CONFIG_USB extern void usb_register_notify(struct notifier_block *nb); extern void usb_unregister_notify(struct notifier_block *nb); #else static inline void usb_register_notify(struct notifier_block *nb) {} static inline void usb_unregister_notify(struct notifier_block *nb) {} #endif #ifdef DEBUG #define dbg(format, arg...) \ printk(KERN_DEBUG "%s: " format "\n", __FILE__, ##arg) #else #define dbg(format, arg...) \ do { \ if (0) \ printk(KERN_DEBUG "%s: " format "\n", __FILE__, ##arg); \ } while (0) #endif #define err(format, arg...) \ printk(KERN_ERR KBUILD_MODNAME ": " format "\n", ##arg) extern struct dentry *usb_debug_root; #endif #endif