/* * (C) Copyright 2001 * Denis Peter, MPL AG Switzerland * * Adapted for U-Boot driver model * (C) Copyright 2015 Google, Inc * * SPDX-License-Identifier: GPL-2.0+ * Note: Part of this code has been derived from linux * */ #ifndef _USB_H_ #define _USB_H_ #include #include #include #include #include /* * The EHCI spec says that we must align to at least 32 bytes. However, * some platforms require larger alignment. */ #if ARCH_DMA_MINALIGN > 32 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN #else #define USB_DMA_MINALIGN 32 #endif /* Everything is aribtrary */ #define USB_ALTSETTINGALLOC 4 #define USB_MAXALTSETTING 128 /* Hard limit */ #define USB_MAX_DEVICE 32 #define USB_MAXCONFIG 8 #define USB_MAXINTERFACES 8 #define USB_MAXENDPOINTS 16 #define USB_MAXCHILDREN 8 /* This is arbitrary */ #define USB_MAX_HUB 16 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */ /* * This is the timeout to allow for submitting an urb in ms. We allow more * time for a BULK device to react - some are slow. */ #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000) /* device request (setup) */ struct devrequest { __u8 requesttype; __u8 request; __le16 value; __le16 index; __le16 length; } __attribute__ ((packed)); /* Interface */ struct usb_interface { struct usb_interface_descriptor desc; __u8 no_of_ep; __u8 num_altsetting; __u8 act_altsetting; struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS]; /* * Super Speed Device will have Super Speed Endpoint * Companion Descriptor (section 9.6.7 of usb 3.0 spec) * Revision 1.0 June 6th 2011 */ struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS]; } __attribute__ ((packed)); /* Configuration information.. */ struct usb_config { struct usb_config_descriptor desc; __u8 no_of_if; /* number of interfaces */ struct usb_interface if_desc[USB_MAXINTERFACES]; } __attribute__ ((packed)); enum { /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */ PACKET_SIZE_8 = 0, PACKET_SIZE_16 = 1, PACKET_SIZE_32 = 2, PACKET_SIZE_64 = 3, }; /** * struct usb_device - information about a USB device * * With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB * (the hubs) have this as parent data. Hubs are children of controllers or * other hubs and there is always a single root hub for each controller. * Therefore struct usb_device can always be accessed with * dev_get_parentdata(dev), where dev is a USB device. * * Pointers exist for obtaining both the device (could be any uclass) and * controller (UCLASS_USB) from this structure. The controller does not have * a struct usb_device since it is not a device. */ struct usb_device { int devnum; /* Device number on USB bus */ int speed; /* full/low/high */ char mf[32]; /* manufacturer */ char prod[32]; /* product */ char serial[32]; /* serial number */ /* Maximum packet size; one of: PACKET_SIZE_* */ int maxpacketsize; /* one bit for each endpoint ([0] = IN, [1] = OUT) */ unsigned int toggle[2]; /* endpoint halts; one bit per endpoint # & direction; * [0] = IN, [1] = OUT */ unsigned int halted[2]; int epmaxpacketin[16]; /* INput endpoint specific maximums */ int epmaxpacketout[16]; /* OUTput endpoint specific maximums */ int configno; /* selected config number */ /* Device Descriptor */ struct usb_device_descriptor descriptor __attribute__((aligned(ARCH_DMA_MINALIGN))); struct usb_config config; /* config descriptor */ int have_langid; /* whether string_langid is valid yet */ int string_langid; /* language ID for strings */ int (*irq_handle)(struct usb_device *dev); unsigned long irq_status; int irq_act_len; /* transfered bytes */ void *privptr; /* * Child devices - if this is a hub device * Each instance needs its own set of data structures. */ unsigned long status; unsigned long int_pending; /* 1 bit per ep, used by int_queue */ int act_len; /* transfered bytes */ int maxchild; /* Number of ports if hub */ int portnr; /* Port number, 1=first */ #ifndef CONFIG_DM_USB /* parent hub, or NULL if this is the root hub */ struct usb_device *parent; struct usb_device *children[USB_MAXCHILDREN]; void *controller; /* hardware controller private data */ #endif /* slot_id - for xHCI enabled devices */ unsigned int slot_id; #ifdef CONFIG_DM_USB struct udevice *dev; /* Pointer to associated device */ struct udevice *controller_dev; /* Pointer to associated controller */ #endif }; struct int_queue; /* * You can initialize platform's USB host or device * ports by passing this enum as an argument to * board_usb_init(). */ enum usb_init_type { USB_INIT_HOST, USB_INIT_DEVICE }; /********************************************************************** * this is how the lowlevel part communicate with the outer world */ #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \ defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \ defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \ defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \ defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \ defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \ defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \ defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_MUSB_SUNXI) || \ defined(CONFIG_USB_XHCI) || defined(CONFIG_USB_DWC2) int usb_lowlevel_init(int index, enum usb_init_type init, void **controller); int usb_lowlevel_stop(int index); #if defined(CONFIG_MUSB_HOST) || defined(CONFIG_DM_USB) int usb_reset_root_port(void); #else #define usb_reset_root_port() #endif int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len); int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len, struct devrequest *setup); int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len, int interval); #if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe, int queuesize, int elementsize, void *buffer, int interval); int destroy_int_queue(struct usb_device *dev, struct int_queue *queue); void *poll_int_queue(struct usb_device *dev, struct int_queue *queue); #endif /* Defines */ #define USB_UHCI_VEND_ID 0x8086 #define USB_UHCI_DEV_ID 0x7112 /* * PXA25x can only act as USB device. There are drivers * which works with USB CDC gadgets implementations. * Some of them have common routines which can be used * in boards init functions e.g. udc_disconnect() used for * forced device disconnection from host. */ #elif defined(CONFIG_USB_GADGET_PXA2XX) extern void udc_disconnect(void); #endif /* * board-specific hardware initialization, called by * usb drivers and u-boot commands * * @param index USB controller number * @param init initializes controller as USB host or device */ int board_usb_init(int index, enum usb_init_type init); /* * can be used to clean up after failed USB initialization attempt * vide: board_usb_init() * * @param index USB controller number for selective cleanup * @param init usb_init_type passed to board_usb_init() */ int board_usb_cleanup(int index, enum usb_init_type init); #ifdef CONFIG_USB_STORAGE #define USB_MAX_STOR_DEV 5 block_dev_desc_t *usb_stor_get_dev(int index); int usb_stor_scan(int mode); int usb_stor_info(void); #endif #ifdef CONFIG_USB_HOST_ETHER #define USB_MAX_ETH_DEV 5 int usb_host_eth_scan(int mode); #endif #ifdef CONFIG_USB_KEYBOARD int drv_usb_kbd_init(void); int usb_kbd_deregister(int force); #endif /* routines */ int usb_init(void); /* initialize the USB Controller */ int usb_stop(void); /* stop the USB Controller */ int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol); int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id); int usb_control_msg(struct usb_device *dev, unsigned int pipe, unsigned char request, unsigned char requesttype, unsigned short value, unsigned short index, void *data, unsigned short size, int timeout); int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout); int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, int transfer_len, int interval); int usb_disable_asynch(int disable); int usb_maxpacket(struct usb_device *dev, unsigned long pipe); int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer, int cfgno); int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size); int usb_get_class_descriptor(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size); int usb_clear_halt(struct usb_device *dev, int pipe); int usb_string(struct usb_device *dev, int index, char *buf, size_t size); int usb_set_interface(struct usb_device *dev, int interface, int alternate); /* big endian -> little endian conversion */ /* some CPUs are already little endian e.g. the ARM920T */ #define __swap_16(x) \ ({ unsigned short x_ = (unsigned short)x; \ (unsigned short)( \ ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \ }) #define __swap_32(x) \ ({ unsigned long x_ = (unsigned long)x; \ (unsigned long)( \ ((x_ & 0x000000FFUL) << 24) | \ ((x_ & 0x0000FF00UL) << 8) | \ ((x_ & 0x00FF0000UL) >> 8) | \ ((x_ & 0xFF000000UL) >> 24)); \ }) #ifdef __LITTLE_ENDIAN # define swap_16(x) (x) # define swap_32(x) (x) #else # define swap_16(x) __swap_16(x) # define swap_32(x) __swap_32(x) #endif /* * Calling this entity a "pipe" is glorifying it. A USB pipe * is something embarrassingly simple: it basically consists * of the following information: * - device number (7 bits) * - endpoint number (4 bits) * - current Data0/1 state (1 bit) * - direction (1 bit) * - speed (2 bits) * - max packet size (2 bits: 8, 16, 32 or 64) * - pipe type (2 bits: control, interrupt, bulk, isochronous) * * That's 18 bits. Really. Nothing more. And the USB people have * documented these eighteen bits as some kind of glorious * virtual data structure. * * Let's not fall in that trap. We'll just encode it as a simple * unsigned int. The encoding is: * * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64) * - direction: bit 7 (0 = Host-to-Device [Out], * (1 = Device-to-Host [In]) * - device: bits 8-14 * - endpoint: bits 15-18 * - Data0/1: bit 19 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, * 10 = control, 11 = bulk) * * Why? Because it's arbitrary, and whatever encoding we select is really * up to us. This one happens to share a lot of bit positions with the UHCI * specification, so that much of the uhci driver can just mask the bits * appropriately. */ /* Create various pipes... */ #define create_pipe(dev,endpoint) \ (((dev)->devnum << 8) | ((endpoint) << 15) | \ (dev)->maxpacketsize) #define default_pipe(dev) ((dev)->speed << 26) #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) #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \ default_pipe(dev)) #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \ default_pipe(dev) | \ USB_DIR_IN) /* The D0/D1 toggle bits */ #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1) #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep)) #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \ ((dev)->toggle[out] & \ ~(1 << ep)) | ((bit) << ep)) /* Endpoint halt control/status */ #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1) #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep))) #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep))) #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep))) #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \ USB_PID_OUT) #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1) #define usb_pipein(pipe) (((pipe) >> 7) & 1) #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff) #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) #define usb_pipedata(pipe) (((pipe) >> 19) & 1) #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) #define usb_pipe_ep_index(pipe) \ usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \ ((usb_pipeendpoint(pipe) * 2) - \ (usb_pipein(pipe) ? 0 : 1)) /************************************************************************* * Hub Stuff */ struct usb_port_status { unsigned short wPortStatus; unsigned short wPortChange; } __attribute__ ((packed)); struct usb_hub_status { unsigned short wHubStatus; unsigned short wHubChange; } __attribute__ ((packed)); /* Hub descriptor */ struct usb_hub_descriptor { unsigned char bLength; unsigned char bDescriptorType; unsigned char bNbrPorts; unsigned short wHubCharacteristics; unsigned char bPwrOn2PwrGood; unsigned char bHubContrCurrent; unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8]; unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8]; /* DeviceRemovable and PortPwrCtrlMask want to be variable-length bitmaps that hold max 255 entries. (bit0 is ignored) */ } __attribute__ ((packed)); struct usb_hub_device { struct usb_device *pusb_dev; struct usb_hub_descriptor desc; }; #ifdef CONFIG_DM_USB /** * struct usb_platdata - Platform data about a USB controller * * Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev) */ struct usb_platdata { enum usb_init_type init_type; }; /** * struct usb_dev_platdata - Platform data about a USB device * * Given a USB device dev this structure is dev_get_parent_platdata(dev). * This is used by sandbox to provide emulation data also. * * @id: ID used to match this device * @speed: Stores the speed associated with a USB device * @devnum: Device address on the USB bus * @slot_id: USB3 slot ID, which is separate from the device address * @portnr: Port number of this device on its parent hub, numbered from 1 * (0 mean this device is the root hub) * @strings: List of descriptor strings (for sandbox emulation purposes) * @desc_list: List of descriptors (for sandbox emulation purposes) */ struct usb_dev_platdata { struct usb_device_id id; enum usb_device_speed speed; int devnum; int slot_id; int portnr; /* Hub port number, 1..n */ #ifdef CONFIG_SANDBOX struct usb_string *strings; /* NULL-terminated list of descriptor pointers */ struct usb_generic_descriptor **desc_list; #endif int configno; }; /** * struct usb_bus_priv - information about the USB controller * * Given a USB controller (UCLASS_USB) 'dev', this is * dev_get_uclass_priv(dev). * * @next_addr: Next device address to allocate minus 1. Incremented by 1 * each time a new device address is set, so this holds the * number of devices on the bus * @desc_before_addr: true if we can read a device descriptor before it * has been assigned an address. For XHCI this is not possible * so this will be false. */ struct usb_bus_priv { int next_addr; bool desc_before_addr; }; /** * struct dm_usb_ops - USB controller operations * * This defines the operations supoorted on a USB controller. Common * arguments are: * * @bus: USB bus (i.e. controller), which is in UCLASS_USB. * @udev: USB device parent data. Controllers are not expected to need * this, since the device address on the bus is encoded in @pipe. * It is used for sandbox, and can be handy for debugging and * logging. * @pipe: An assortment of bitfields which provide address and packet * type information. See create_pipe() above for encoding * details * @buffer: A buffer to use for sending/receiving. This should be * DMA-aligned. * @length: Buffer length in bytes */ struct dm_usb_ops { /** * control() - Send a control message * * Most parameters are as above. * * @setup: Additional setup information required by the message */ int (*control)(struct udevice *bus, struct usb_device *udev, unsigned long pipe, void *buffer, int length, struct devrequest *setup); /** * bulk() - Send a bulk message * * Parameters are as above. */ int (*bulk)(struct udevice *bus, struct usb_device *udev, unsigned long pipe, void *buffer, int length); /** * interrupt() - Send an interrupt message * * Most parameters are as above. * * @interval: Interrupt interval */ int (*interrupt)(struct udevice *bus, struct usb_device *udev, unsigned long pipe, void *buffer, int length, int interval); /** * alloc_device() - Allocate a new device context (XHCI) * * Before sending packets to a new device on an XHCI bus, a device * context must be created. If this method is not NULL it will be * called before the device is enumerated (even before its descriptor * is read). This should be NULL for EHCI, which does not need this. */ int (*alloc_device)(struct udevice *bus, struct usb_device *udev); }; #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops) #define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops) #ifdef CONFIG_MUSB_HOST int usb_reset_root_port(void); #endif /** * usb_get_dev_index() - look up a device index number * * Look up devices using their index number (starting at 0). This works since * in U-Boot device addresses are allocated starting at 1 with no gaps. * * TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified * to work better with driver model. * * @bus: USB bus to check * @index: Index number of device to find (0=first). This is just the * device address less 1. */ struct usb_device *usb_get_dev_index(struct udevice *bus, int index); /** * usb_legacy_port_reset() - Legacy function to reset a hub port * * @hub: Hub device * @portnr: Port number (1=first) */ int usb_legacy_port_reset(struct usb_device *hub, int portnr); /** * usb_setup_device() - set up a device ready for use * * @dev: USB device pointer. This need not be a real device - it is * common for it to just be a local variable with its ->dev * member (i.e. @dev->dev) set to the parent device * @do_read: true to read the device descriptor before an address is set * (should be false for XHCI buses, true otherwise) * @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB) * @portnr: Port number on hub (1=first) or 0 for none * @return 0 if OK, -ve on error */ int usb_setup_device(struct usb_device *dev, bool do_read, struct usb_device *parent, int portnr); /** * usb_hub_scan() - Scan a hub and find its devices * * @hub: Hub device to scan */ int usb_hub_scan(struct udevice *hub); /** * usb_scan_device() - Scan a device on a bus * * Scan a device on a bus. It has already been detected and is ready to * be enumerated. This may be either the root hub (@parent is a bus) or a * normal device (@parent is a hub) * * @parent: Parent device * @port: Hub port number (numbered from 1) * @speed: USB speed to use for this device * @devp: Returns pointer to device if all is well * @return 0 if OK, -ve on error */ int usb_scan_device(struct udevice *parent, int port, enum usb_device_speed speed, struct udevice **devp); /** * usb_get_bus() - Find the bus for a device * * Search up through parents to find the bus this device is connected to. This * will be a device with uclass UCLASS_USB. * * @dev: Device to check * @busp: Returns bus, or NULL if not found * @return 0 if OK, -EXDEV is somehow this bus does not have a controller (this * indicates a critical error in the USB stack */ int usb_get_bus(struct udevice *dev, struct udevice **busp); /** * usb_select_config() - Set up a device ready for use * * This function assumes that the device already has an address and a driver * bound, and is ready to be set up. * * This re-reads the device and configuration descriptors and sets the * configuration * * @dev: Device to set up */ int usb_select_config(struct usb_device *dev); /** * usb_child_pre_probe() - Pre-probe function for USB devices * * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the * device from the saved platform data and calls usb_select_config() to * finish set up. * * Once this is done, the device's normal driver can take over, knowing the * device is accessible on the USB bus. * * This function is for use only by the internal USB stack. * * @dev: Device to set up */ int usb_child_pre_probe(struct udevice *dev); struct ehci_ctrl; /** * usb_setup_ehci_gadget() - Set up a USB device as a gadget * * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model * * This provides a way to tell a controller to start up as a USB device * instead of as a host. It is untested. */ int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp); /** * usb_stor_reset() - Prepare to scan USB storage devices * * Empty the list of USB storage devices in preparation for scanning them. * This must be called before a USB scan. */ void usb_stor_reset(void); #else /* !CONFIG_DM_USB */ struct usb_device *usb_get_dev_index(int index); #endif bool usb_device_has_child_on_port(struct usb_device *parent, int port); int usb_hub_probe(struct usb_device *dev, int ifnum); void usb_hub_reset(void); /** * legacy_hub_port_reset() - reset a port given its usb_device pointer * * Reset a hub port and see if a device is present on that port, providing * sufficient time for it to show itself. The port status is returned. * * With driver model this moves to hub_port_reset() and is passed a struct * udevice. * * @dev: USB device to reset * @port: Port number to reset (note ports are numbered from 0 here) * @portstat: Returns port status */ int legacy_hub_port_reset(struct usb_device *dev, int port, unsigned short *portstat); int hub_port_reset(struct udevice *dev, int port, unsigned short *portstat); /** * usb_alloc_new_device() - Allocate a new device * * @devp: returns a pointer of a new device structure. With driver model this * is a device pointer, but with legacy USB this pointer is * driver-specific. * @return 0 if OK, -ENOSPC if we have found out of room for new devices */ int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp); /** * usb_free_device() - Free a partially-inited device * * This is an internal function. It is used to reverse the action of * usb_alloc_new_device() when we hit a problem during init. */ void usb_free_device(struct udevice *controller); int usb_new_device(struct usb_device *dev); int usb_alloc_device(struct usb_device *dev); #endif /*_USB_H_ */