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2df1e9a62a
USB enumeration lock is locked, then the USB stack fails to resume the device because locking the USB enumeration lock is part of the resume procedure. To solve this issue a new lock is introduced which only protects the suspend and resume callbacks, which can be dropped inside the usbd_do_request_flags() function, to allow suspend and resume during so-called enumeration operations. Submitted by: Hans Petter Selasky
224 lines
8.1 KiB
C
224 lines
8.1 KiB
C
/* $FreeBSD$ */
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/*-
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* Copyright (c) 2008 Hans Petter Selasky. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _USB_DEVICE_H_
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#define _USB_DEVICE_H_
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struct usb_symlink; /* UGEN */
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struct usb_device; /* linux compat */
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#define USB_CTRL_XFER_MAX 2
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/* "usb_parse_config()" commands */
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#define USB_CFG_ALLOC 0
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#define USB_CFG_FREE 1
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#define USB_CFG_INIT 2
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/* "usb_unconfigure()" flags */
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#define USB_UNCFG_FLAG_NONE 0x00
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#define USB_UNCFG_FLAG_FREE_EP0 0x02 /* endpoint zero is freed */
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struct usb_clear_stall_msg {
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struct usb_proc_msg hdr;
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struct usb_device *udev;
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};
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/* The following four structures makes up a tree, where we have the
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* leaf structure, "usb_host_endpoint", first, and the root structure,
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* "usb_device", last. The four structures below mirror the structure
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* of the USB descriptors belonging to an USB configuration. Please
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* refer to the USB specification for a definition of "endpoints" and
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* "interfaces".
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*/
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struct usb_host_endpoint {
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struct usb_endpoint_descriptor desc;
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TAILQ_HEAD(, urb) bsd_urb_list;
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struct usb_xfer *bsd_xfer[2];
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uint8_t *extra; /* Extra descriptors */
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usb_frlength_t fbsd_buf_size;
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uint16_t extralen;
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uint8_t bsd_iface_index;
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} __aligned(USB_HOST_ALIGN);
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struct usb_host_interface {
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struct usb_interface_descriptor desc;
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/* the following array has size "desc.bNumEndpoint" */
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struct usb_host_endpoint *endpoint;
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const char *string; /* iInterface string, if present */
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uint8_t *extra; /* Extra descriptors */
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uint16_t extralen;
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uint8_t bsd_iface_index;
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} __aligned(USB_HOST_ALIGN);
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/*
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* The following structure defines the USB device flags.
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*/
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struct usb_device_flags {
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enum usb_hc_mode usb_mode; /* host or device mode */
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uint8_t self_powered:1; /* set if USB device is self powered */
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uint8_t no_strings:1; /* set if USB device does not support
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* strings */
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uint8_t remote_wakeup:1; /* set if remote wakeup is enabled */
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uint8_t uq_bus_powered:1; /* set if BUS powered quirk is present */
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/*
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* NOTE: Although the flags below will reach the same value
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* over time, but the instant values may differ, and
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* consequently the flags cannot be merged into one!
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*/
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uint8_t peer_suspended:1; /* set if peer is suspended */
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uint8_t self_suspended:1; /* set if self is suspended */
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};
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/*
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* The following structure is used for power-save purposes. The data
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* in this structure is protected by the USB BUS lock.
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*/
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struct usb_power_save {
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usb_ticks_t last_xfer_time; /* copy of "ticks" */
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usb_size_t type_refs[4]; /* transfer reference count */
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usb_size_t read_refs; /* data read references */
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usb_size_t write_refs; /* data write references */
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};
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/*
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* The following structure defines an USB device. There exists one of
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* these structures for every USB device.
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*/
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struct usb_device {
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struct usb_clear_stall_msg cs_msg[2]; /* generic clear stall
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* messages */
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struct sx ctrl_sx;
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struct sx enum_sx;
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struct sx sr_sx;
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struct mtx device_mtx;
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struct cv ctrlreq_cv;
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struct cv ref_cv;
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struct usb_interface *ifaces;
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struct usb_endpoint ctrl_ep; /* Control Endpoint 0 */
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struct usb_endpoint *endpoints;
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struct usb_power_save pwr_save;/* power save data */
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struct usb_bus *bus; /* our USB BUS */
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device_t parent_dev; /* parent device */
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struct usb_device *parent_hub;
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struct usb_device *parent_hs_hub; /* high-speed parent HUB */
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struct usb_config_descriptor *cdesc; /* full config descr */
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struct usb_hub *hub; /* only if this is a hub */
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struct usb_xfer *ctrl_xfer[USB_CTRL_XFER_MAX];
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struct usb_temp_data *usb_template_ptr;
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struct usb_endpoint *ep_curr; /* current clear stall endpoint */
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#if USB_HAVE_UGEN
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struct usb_fifo *fifo[USB_FIFO_MAX];
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struct usb_symlink *ugen_symlink; /* our generic symlink */
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struct cdev *ctrl_dev; /* Control Endpoint 0 device node */
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LIST_HEAD(,usb_fs_privdata) pd_list;
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char ugen_name[20]; /* name of ugenX.X device */
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#endif
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usb_ticks_t plugtime; /* copy of "ticks" */
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enum usb_dev_state state;
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enum usb_dev_speed speed;
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uint16_t refcount;
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#define USB_DEV_REF_MAX 0xffff
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uint16_t power; /* mA the device uses */
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uint16_t langid; /* language for strings */
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uint8_t address; /* device addess */
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uint8_t device_index; /* device index in "bus->devices" */
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uint8_t curr_config_index; /* current configuration index */
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uint8_t curr_config_no; /* current configuration number */
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uint8_t depth; /* distance from root HUB */
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uint8_t port_index; /* parent HUB port index */
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uint8_t port_no; /* parent HUB port number */
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uint8_t hs_hub_addr; /* high-speed HUB address */
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uint8_t hs_port_no; /* high-speed HUB port number */
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uint8_t driver_added_refcount; /* our driver added generation count */
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uint8_t power_mode; /* see USB_POWER_XXX */
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uint8_t ifaces_max; /* number of interfaces present */
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uint8_t endpoints_max; /* number of endpoints present */
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/* the "flags" field is write-protected by "bus->mtx" */
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struct usb_device_flags flags;
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struct usb_endpoint_descriptor ctrl_ep_desc; /* for endpoint 0 */
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struct usb_device_descriptor ddesc; /* device descriptor */
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char *serial; /* serial number */
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char *manufacturer; /* manufacturer string */
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char *product; /* product string */
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#if USB_HAVE_COMPAT_LINUX
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/* Linux compat */
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struct usb_device_descriptor descriptor;
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struct usb_host_endpoint ep0;
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struct usb_interface *linux_iface_start;
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struct usb_interface *linux_iface_end;
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struct usb_host_endpoint *linux_endpoint_start;
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struct usb_host_endpoint *linux_endpoint_end;
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uint16_t devnum;
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#endif
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};
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/* globals */
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extern int usb_template;
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/* function prototypes */
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const char *usb_statestr(enum usb_dev_state state);
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struct usb_device *usb_alloc_device(device_t parent_dev, struct usb_bus *bus,
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struct usb_device *parent_hub, uint8_t depth,
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uint8_t port_index, uint8_t port_no,
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enum usb_dev_speed speed, enum usb_hc_mode mode);
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usb_error_t usb_probe_and_attach(struct usb_device *udev,
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uint8_t iface_index);
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void usb_detach_device(struct usb_device *, uint8_t, uint8_t);
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usb_error_t usb_reset_iface_endpoints(struct usb_device *udev,
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uint8_t iface_index);
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usb_error_t usbd_set_config_index(struct usb_device *udev, uint8_t index);
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usb_error_t usbd_set_endpoint_stall(struct usb_device *udev,
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struct usb_endpoint *ep, uint8_t do_stall);
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usb_error_t usb_suspend_resume(struct usb_device *udev,
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uint8_t do_suspend);
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void usb_devinfo(struct usb_device *udev, char *dst_ptr, uint16_t dst_len);
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void usb_free_device(struct usb_device *, uint8_t);
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void usb_linux_free_device(struct usb_device *dev);
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uint8_t usb_peer_can_wakeup(struct usb_device *udev);
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struct usb_endpoint *usb_endpoint_foreach(struct usb_device *udev, struct usb_endpoint *ep);
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void usb_set_device_state(struct usb_device *udev,
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enum usb_dev_state state);
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void usbd_enum_lock(struct usb_device *);
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void usbd_enum_unlock(struct usb_device *);
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void usbd_sr_lock(struct usb_device *);
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void usbd_sr_unlock(struct usb_device *);
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uint8_t usbd_enum_is_locked(struct usb_device *);
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#endif /* _USB_DEVICE_H_ */
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