3 * Denis Peter, MPL AG Switzerland
5 * Adapted for U-Boot driver model
6 * (C) Copyright 2015 Google, Inc
8 * SPDX-License-Identifier: GPL-2.0+
9 * Note: Part of this code has been derived from linux
17 #include <linux/usb/ch9.h>
18 #include <asm/cache.h>
22 * The EHCI spec says that we must align to at least 32 bytes. However,
23 * some platforms require larger alignment.
25 #if ARCH_DMA_MINALIGN > 32
26 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
28 #define USB_DMA_MINALIGN 32
31 /* Everything is aribtrary */
32 #define USB_ALTSETTINGALLOC 4
33 #define USB_MAXALTSETTING 128 /* Hard limit */
35 #define USB_MAX_DEVICE 32
36 #define USB_MAXCONFIG 8
37 #define USB_MAXINTERFACES 8
38 #define USB_MAXENDPOINTS 16
39 #define USB_MAXCHILDREN 8 /* This is arbitrary */
40 #define USB_MAX_HUB 16
42 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
45 * This is the timeout to allow for submitting an urb in ms. We allow more
46 * time for a BULK device to react - some are slow.
48 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
50 /* device request (setup) */
57 } __attribute__ ((packed));
60 struct usb_interface {
61 struct usb_interface_descriptor desc;
67 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
69 * Super Speed Device will have Super Speed Endpoint
70 * Companion Descriptor (section 9.6.7 of usb 3.0 spec)
71 * Revision 1.0 June 6th 2011
73 struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
74 } __attribute__ ((packed));
76 /* Configuration information.. */
78 struct usb_config_descriptor desc;
80 __u8 no_of_if; /* number of interfaces */
81 struct usb_interface if_desc[USB_MAXINTERFACES];
82 } __attribute__ ((packed));
85 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
93 * struct usb_device - information about a USB device
95 * With driver model both UCLASS_USB (the USB controllers) and UCLASS_USB_HUB
96 * (the hubs) have this as parent data. Hubs are children of controllers or
97 * other hubs and there is always a single root hub for each controller.
98 * Therefore struct usb_device can always be accessed with
99 * dev_get_parentdata(dev), where dev is a USB device.
101 * Pointers exist for obtaining both the device (could be any uclass) and
102 * controller (UCLASS_USB) from this structure. The controller does not have
103 * a struct usb_device since it is not a device.
106 int devnum; /* Device number on USB bus */
107 int speed; /* full/low/high */
108 char mf[32]; /* manufacturer */
109 char prod[32]; /* product */
110 char serial[32]; /* serial number */
112 /* Maximum packet size; one of: PACKET_SIZE_* */
114 /* one bit for each endpoint ([0] = IN, [1] = OUT) */
115 unsigned int toggle[2];
116 /* endpoint halts; one bit per endpoint # & direction;
117 * [0] = IN, [1] = OUT
119 unsigned int halted[2];
120 int epmaxpacketin[16]; /* INput endpoint specific maximums */
121 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
123 int configno; /* selected config number */
124 /* Device Descriptor */
125 struct usb_device_descriptor descriptor
126 __attribute__((aligned(ARCH_DMA_MINALIGN)));
127 struct usb_config config; /* config descriptor */
129 int have_langid; /* whether string_langid is valid yet */
130 int string_langid; /* language ID for strings */
131 int (*irq_handle)(struct usb_device *dev);
132 unsigned long irq_status;
133 int irq_act_len; /* transfered bytes */
136 * Child devices - if this is a hub device
137 * Each instance needs its own set of data structures.
139 unsigned long status;
140 unsigned long int_pending; /* 1 bit per ep, used by int_queue */
141 int act_len; /* transfered bytes */
142 int maxchild; /* Number of ports if hub */
143 int portnr; /* Port number, 1=first */
144 #ifndef CONFIG_DM_USB
145 /* parent hub, or NULL if this is the root hub */
146 struct usb_device *parent;
147 struct usb_device *children[USB_MAXCHILDREN];
148 void *controller; /* hardware controller private data */
150 /* slot_id - for xHCI enabled devices */
151 unsigned int slot_id;
153 struct udevice *dev; /* Pointer to associated device */
154 struct udevice *controller_dev; /* Pointer to associated controller */
161 * You can initialize platform's USB host or device
162 * ports by passing this enum as an argument to
170 /**********************************************************************
171 * this is how the lowlevel part communicate with the outer world
174 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
175 defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
176 defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
177 defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
178 defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
179 defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \
180 defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \
181 defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined(CONFIG_USB_MUSB_SUNXI) || \
182 defined(CONFIG_USB_XHCI) || defined(CONFIG_USB_DWC2)
184 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller);
185 int usb_lowlevel_stop(int index);
187 #if defined(CONFIG_MUSB_HOST) || defined(CONFIG_DM_USB)
188 int usb_reset_root_port(void);
190 #define usb_reset_root_port()
193 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
194 void *buffer, int transfer_len);
195 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
196 int transfer_len, struct devrequest *setup);
197 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
198 int transfer_len, int interval);
200 #if defined CONFIG_USB_EHCI || defined CONFIG_MUSB_HOST
201 struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe,
202 int queuesize, int elementsize, void *buffer, int interval);
203 int destroy_int_queue(struct usb_device *dev, struct int_queue *queue);
204 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue);
208 #define USB_UHCI_VEND_ID 0x8086
209 #define USB_UHCI_DEV_ID 0x7112
212 * PXA25x can only act as USB device. There are drivers
213 * which works with USB CDC gadgets implementations.
214 * Some of them have common routines which can be used
215 * in boards init functions e.g. udc_disconnect() used for
216 * forced device disconnection from host.
218 #elif defined(CONFIG_USB_GADGET_PXA2XX)
220 extern void udc_disconnect(void);
225 * board-specific hardware initialization, called by
226 * usb drivers and u-boot commands
228 * @param index USB controller number
229 * @param init initializes controller as USB host or device
231 int board_usb_init(int index, enum usb_init_type init);
234 * can be used to clean up after failed USB initialization attempt
235 * vide: board_usb_init()
237 * @param index USB controller number for selective cleanup
238 * @param init usb_init_type passed to board_usb_init()
240 int board_usb_cleanup(int index, enum usb_init_type init);
242 #ifdef CONFIG_USB_STORAGE
244 #define USB_MAX_STOR_DEV 5
245 block_dev_desc_t *usb_stor_get_dev(int index);
246 int usb_stor_scan(int mode);
247 int usb_stor_info(void);
251 #ifdef CONFIG_USB_HOST_ETHER
253 #define USB_MAX_ETH_DEV 5
254 int usb_host_eth_scan(int mode);
258 #ifdef CONFIG_USB_KEYBOARD
260 int drv_usb_kbd_init(void);
261 int usb_kbd_deregister(int force);
265 int usb_init(void); /* initialize the USB Controller */
266 int usb_stop(void); /* stop the USB Controller */
269 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
270 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
272 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
273 unsigned char request, unsigned char requesttype,
274 unsigned short value, unsigned short index,
275 void *data, unsigned short size, int timeout);
276 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
277 void *data, int len, int *actual_length, int timeout);
278 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
279 void *buffer, int transfer_len, int interval);
280 int usb_disable_asynch(int disable);
281 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
282 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
284 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
285 unsigned char id, void *buf, int size);
286 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
287 unsigned char type, unsigned char id, void *buf,
289 int usb_clear_halt(struct usb_device *dev, int pipe);
290 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
291 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
293 /* big endian -> little endian conversion */
294 /* some CPUs are already little endian e.g. the ARM920T */
295 #define __swap_16(x) \
296 ({ unsigned short x_ = (unsigned short)x; \
298 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
300 #define __swap_32(x) \
301 ({ unsigned long x_ = (unsigned long)x; \
303 ((x_ & 0x000000FFUL) << 24) | \
304 ((x_ & 0x0000FF00UL) << 8) | \
305 ((x_ & 0x00FF0000UL) >> 8) | \
306 ((x_ & 0xFF000000UL) >> 24)); \
309 #ifdef __LITTLE_ENDIAN
310 # define swap_16(x) (x)
311 # define swap_32(x) (x)
313 # define swap_16(x) __swap_16(x)
314 # define swap_32(x) __swap_32(x)
318 * Calling this entity a "pipe" is glorifying it. A USB pipe
319 * is something embarrassingly simple: it basically consists
320 * of the following information:
321 * - device number (7 bits)
322 * - endpoint number (4 bits)
323 * - current Data0/1 state (1 bit)
324 * - direction (1 bit)
326 * - max packet size (2 bits: 8, 16, 32 or 64)
327 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
329 * That's 18 bits. Really. Nothing more. And the USB people have
330 * documented these eighteen bits as some kind of glorious
331 * virtual data structure.
333 * Let's not fall in that trap. We'll just encode it as a simple
334 * unsigned int. The encoding is:
336 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
337 * - direction: bit 7 (0 = Host-to-Device [Out],
338 * (1 = Device-to-Host [In])
339 * - device: bits 8-14
340 * - endpoint: bits 15-18
342 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
343 * 10 = control, 11 = bulk)
345 * Why? Because it's arbitrary, and whatever encoding we select is really
346 * up to us. This one happens to share a lot of bit positions with the UHCI
347 * specification, so that much of the uhci driver can just mask the bits
350 /* Create various pipes... */
351 #define create_pipe(dev,endpoint) \
352 (((dev)->devnum << 8) | ((endpoint) << 15) | \
353 (dev)->maxpacketsize)
354 #define default_pipe(dev) ((dev)->speed << 26)
356 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
357 create_pipe(dev, endpoint))
358 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
359 create_pipe(dev, endpoint) | \
361 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
362 create_pipe(dev, endpoint))
363 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
364 create_pipe(dev, endpoint) | \
366 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
367 create_pipe(dev, endpoint))
368 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
369 create_pipe(dev, endpoint) | \
371 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
372 create_pipe(dev, endpoint))
373 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
374 create_pipe(dev, endpoint) | \
376 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
378 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
379 default_pipe(dev) | \
382 /* The D0/D1 toggle bits */
383 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
384 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
385 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
386 ((dev)->toggle[out] & \
387 ~(1 << ep)) | ((bit) << ep))
389 /* Endpoint halt control/status */
390 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
391 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
392 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
393 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
395 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
398 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
399 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
400 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
401 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
402 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
403 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
404 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
405 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
406 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
407 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
408 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
410 #define usb_pipe_ep_index(pipe) \
411 usb_pipecontrol(pipe) ? (usb_pipeendpoint(pipe) * 2) : \
412 ((usb_pipeendpoint(pipe) * 2) - \
413 (usb_pipein(pipe) ? 0 : 1))
415 /*************************************************************************
418 struct usb_port_status {
419 unsigned short wPortStatus;
420 unsigned short wPortChange;
421 } __attribute__ ((packed));
423 struct usb_hub_status {
424 unsigned short wHubStatus;
425 unsigned short wHubChange;
426 } __attribute__ ((packed));
430 struct usb_hub_descriptor {
431 unsigned char bLength;
432 unsigned char bDescriptorType;
433 unsigned char bNbrPorts;
434 unsigned short wHubCharacteristics;
435 unsigned char bPwrOn2PwrGood;
436 unsigned char bHubContrCurrent;
437 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
438 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
439 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
440 bitmaps that hold max 255 entries. (bit0 is ignored) */
441 } __attribute__ ((packed));
444 struct usb_hub_device {
445 struct usb_device *pusb_dev;
446 struct usb_hub_descriptor desc;
451 * struct usb_platdata - Platform data about a USB controller
453 * Given a USB controller (UCLASS_USB) dev this is dev_get_platdata(dev)
455 struct usb_platdata {
456 enum usb_init_type init_type;
460 * struct usb_dev_platdata - Platform data about a USB device
462 * Given a USB device dev this structure is dev_get_parent_platdata(dev).
463 * This is used by sandbox to provide emulation data also.
465 * @id: ID used to match this device
466 * @speed: Stores the speed associated with a USB device
467 * @devnum: Device address on the USB bus
468 * @slot_id: USB3 slot ID, which is separate from the device address
469 * @portnr: Port number of this device on its parent hub, numbered from 1
470 * (0 mean this device is the root hub)
471 * @strings: List of descriptor strings (for sandbox emulation purposes)
472 * @desc_list: List of descriptors (for sandbox emulation purposes)
474 struct usb_dev_platdata {
475 struct usb_device_id id;
476 enum usb_device_speed speed;
479 int portnr; /* Hub port number, 1..n */
480 #ifdef CONFIG_SANDBOX
481 struct usb_string *strings;
482 /* NULL-terminated list of descriptor pointers */
483 struct usb_generic_descriptor **desc_list;
489 * struct usb_bus_priv - information about the USB controller
491 * Given a USB controller (UCLASS_USB) 'dev', this is
492 * dev_get_uclass_priv(dev).
494 * @next_addr: Next device address to allocate minus 1. Incremented by 1
495 * each time a new device address is set, so this holds the
496 * number of devices on the bus
497 * @desc_before_addr: true if we can read a device descriptor before it
498 * has been assigned an address. For XHCI this is not possible
499 * so this will be false.
501 struct usb_bus_priv {
503 bool desc_before_addr;
507 * struct dm_usb_ops - USB controller operations
509 * This defines the operations supoorted on a USB controller. Common
512 * @bus: USB bus (i.e. controller), which is in UCLASS_USB.
513 * @udev: USB device parent data. Controllers are not expected to need
514 * this, since the device address on the bus is encoded in @pipe.
515 * It is used for sandbox, and can be handy for debugging and
517 * @pipe: An assortment of bitfields which provide address and packet
518 * type information. See create_pipe() above for encoding
520 * @buffer: A buffer to use for sending/receiving. This should be
522 * @length: Buffer length in bytes
526 * control() - Send a control message
528 * Most parameters are as above.
530 * @setup: Additional setup information required by the message
532 int (*control)(struct udevice *bus, struct usb_device *udev,
533 unsigned long pipe, void *buffer, int length,
534 struct devrequest *setup);
536 * bulk() - Send a bulk message
538 * Parameters are as above.
540 int (*bulk)(struct udevice *bus, struct usb_device *udev,
541 unsigned long pipe, void *buffer, int length);
543 * interrupt() - Send an interrupt message
545 * Most parameters are as above.
547 * @interval: Interrupt interval
549 int (*interrupt)(struct udevice *bus, struct usb_device *udev,
550 unsigned long pipe, void *buffer, int length,
553 * alloc_device() - Allocate a new device context (XHCI)
555 * Before sending packets to a new device on an XHCI bus, a device
556 * context must be created. If this method is not NULL it will be
557 * called before the device is enumerated (even before its descriptor
558 * is read). This should be NULL for EHCI, which does not need this.
560 int (*alloc_device)(struct udevice *bus, struct usb_device *udev);
563 #define usb_get_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
564 #define usb_get_emul_ops(dev) ((struct dm_usb_ops *)(dev)->driver->ops)
566 #ifdef CONFIG_MUSB_HOST
567 int usb_reset_root_port(void);
571 * usb_get_dev_index() - look up a device index number
573 * Look up devices using their index number (starting at 0). This works since
574 * in U-Boot device addresses are allocated starting at 1 with no gaps.
576 * TODO(sjg@chromium.org): Remove this function when usb_ether.c is modified
577 * to work better with driver model.
579 * @bus: USB bus to check
580 * @index: Index number of device to find (0=first). This is just the
581 * device address less 1.
583 struct usb_device *usb_get_dev_index(struct udevice *bus, int index);
586 * usb_legacy_port_reset() - Legacy function to reset a hub port
589 * @portnr: Port number (1=first)
591 int usb_legacy_port_reset(struct usb_device *hub, int portnr);
594 * usb_setup_device() - set up a device ready for use
596 * @dev: USB device pointer. This need not be a real device - it is
597 * common for it to just be a local variable with its ->dev
598 * member (i.e. @dev->dev) set to the parent device
599 * @do_read: true to read the device descriptor before an address is set
600 * (should be false for XHCI buses, true otherwise)
601 * @parent: Parent device (either UCLASS_USB or UCLASS_USB_HUB)
602 * @portnr: Port number on hub (1=first) or 0 for none
603 * @return 0 if OK, -ve on error */
604 int usb_setup_device(struct usb_device *dev, bool do_read,
605 struct usb_device *parent, int portnr);
608 * usb_hub_scan() - Scan a hub and find its devices
610 * @hub: Hub device to scan
612 int usb_hub_scan(struct udevice *hub);
615 * usb_scan_device() - Scan a device on a bus
617 * Scan a device on a bus. It has already been detected and is ready to
618 * be enumerated. This may be either the root hub (@parent is a bus) or a
619 * normal device (@parent is a hub)
621 * @parent: Parent device
622 * @port: Hub port number (numbered from 1)
623 * @speed: USB speed to use for this device
624 * @devp: Returns pointer to device if all is well
625 * @return 0 if OK, -ve on error
627 int usb_scan_device(struct udevice *parent, int port,
628 enum usb_device_speed speed, struct udevice **devp);
631 * usb_get_bus() - Find the bus for a device
633 * Search up through parents to find the bus this device is connected to. This
634 * will be a device with uclass UCLASS_USB.
636 * @dev: Device to check
637 * @busp: Returns bus, or NULL if not found
638 * @return 0 if OK, -EXDEV is somehow this bus does not have a controller (this
639 * indicates a critical error in the USB stack
641 int usb_get_bus(struct udevice *dev, struct udevice **busp);
644 * usb_select_config() - Set up a device ready for use
646 * This function assumes that the device already has an address and a driver
647 * bound, and is ready to be set up.
649 * This re-reads the device and configuration descriptors and sets the
652 * @dev: Device to set up
654 int usb_select_config(struct usb_device *dev);
657 * usb_child_pre_probe() - Pre-probe function for USB devices
659 * This is called on all children of hubs and USB controllers (i.e. UCLASS_USB
660 * and UCLASS_USB_HUB) when a new device is about to be probed. It sets up the
661 * device from the saved platform data and calls usb_select_config() to
664 * Once this is done, the device's normal driver can take over, knowing the
665 * device is accessible on the USB bus.
667 * This function is for use only by the internal USB stack.
669 * @dev: Device to set up
671 int usb_child_pre_probe(struct udevice *dev);
676 * usb_setup_ehci_gadget() - Set up a USB device as a gadget
678 * TODO(sjg@chromium.org): Tidy this up when USB gadgets can use driver model
680 * This provides a way to tell a controller to start up as a USB device
681 * instead of as a host. It is untested.
683 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp);
686 * usb_stor_reset() - Prepare to scan USB storage devices
688 * Empty the list of USB storage devices in preparation for scanning them.
689 * This must be called before a USB scan.
691 void usb_stor_reset(void);
693 #else /* !CONFIG_DM_USB */
695 struct usb_device *usb_get_dev_index(int index);
699 bool usb_device_has_child_on_port(struct usb_device *parent, int port);
701 int usb_hub_probe(struct usb_device *dev, int ifnum);
702 void usb_hub_reset(void);
703 int hub_port_reset(struct usb_device *dev, int port,
704 unsigned short *portstat);
707 * usb_alloc_new_device() - Allocate a new device
709 * @devp: returns a pointer of a new device structure. With driver model this
710 * is a device pointer, but with legacy USB this pointer is
712 * @return 0 if OK, -ENOSPC if we have found out of room for new devices
714 int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp);
717 * usb_free_device() - Free a partially-inited device
719 * This is an internal function. It is used to reverse the action of
720 * usb_alloc_new_device() when we hit a problem during init.
722 void usb_free_device(struct udevice *controller);
724 int usb_new_device(struct usb_device *dev);
726 int usb_alloc_device(struct usb_device *dev);