usb_device.h

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/* $FreeBSD$ */
/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2008-2019 Hans Petter Selasky. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
 
#ifndef _USB_DEVICE_H_
#define _USB_DEVICE_H_
 
#ifndef USB_GLOBAL_INCLUDE_FILE
#include <dev/usb/usb_core.h>
#include <dev/usb/usb_busdma.h>
#include <dev/usb/usb_transfer.h>
#endif
 
struct usb_bus_methods;
struct usb_config_descriptor;
struct usb_device;              /* linux compat */
struct usb_fs_privdata;
struct usb_hw_ep_profile;
struct usb_symlink;             /* UGEN */
 
#define USB_CTRL_XFER_MAX 2
 
/* "usb_config_parse()" commands */
 
#define USB_CFG_ALLOC 0
#define USB_CFG_FREE 1
#define USB_CFG_INIT 2
 
/* "usb_unconfigure()" flags */
 
#define USB_UNCFG_FLAG_NONE 0x00
#define USB_UNCFG_FLAG_FREE_EP0 0x02            /* endpoint zero is freed */
 
struct usb_udev_msg {
        struct usb_proc_msg hdr;
        struct usb_device *udev;
};
 
/* The following four structures makes up a tree, where we have the
 * leaf structure, "usb_host_endpoint", first, and the root structure,
 * "usb_device", last. The four structures below mirror the structure
 * of the USB descriptors belonging to an USB configuration. Please
 * refer to the USB specification for a definition of "endpoints" and
 * "interfaces".
 */
struct usb_host_endpoint {
        struct usb_endpoint_descriptor desc;
        TAILQ_HEAD(, urb) bsd_urb_list;
        struct usb_xfer *bsd_xfer[2];
        uint8_t *extra;                 /* Extra descriptors */
        usb_frlength_t fbsd_buf_size;
        uint16_t extralen;
        uint8_t bsd_iface_index;
} __aligned(USB_HOST_ALIGN);
 
struct usb_host_interface {
        struct usb_interface_descriptor desc;
        /* the following array has size "desc.bNumEndpoint" */
        struct usb_host_endpoint *endpoint;
        const char *string;             /* iInterface string, if present */
        uint8_t *extra;                 /* Extra descriptors */
        uint16_t extralen;
        uint8_t bsd_iface_index;
} __aligned(USB_HOST_ALIGN);
 
/*
 * The following structure defines the USB device flags.
 */
struct usb_device_flags {
        enum usb_hc_mode usb_mode;      /* host or device mode */
        uint8_t self_powered:1;         /* set if USB device is self powered */
        uint8_t no_strings:1;           /* set if USB device does not support
                                         * strings */
        uint8_t remote_wakeup:1;        /* set if remote wakeup is enabled */
        uint8_t uq_bus_powered:1;       /* set if BUS powered quirk is present */
 
        /*
         * NOTE: Although the flags below will reach the same value
         * over time, but the instant values may differ, and
         * consequently the flags cannot be merged into one!
         */
        uint8_t peer_suspended:1;       /* set if peer is suspended */
        uint8_t self_suspended:1;       /* set if self is suspended */
};
 
/*
 * The following structure is used for power-save purposes. The data
 * in this structure is protected by the USB BUS lock.
 */
struct usb_power_save {
        usb_ticks_t last_xfer_time;     /* copy of "ticks" */
        usb_size_t type_refs[4];        /* transfer reference count */
        usb_size_t read_refs;           /* data read references */
        usb_size_t write_refs;          /* data write references */
};
 
/*
 * The following structure is used when trying to allocate hardware
 * endpoints for an USB configuration in USB device side mode.
 */
struct usb_hw_ep_scratch_sub {
        const struct usb_hw_ep_profile *pf;
        uint16_t max_frame_size;
        uint8_t hw_endpoint_out;
        uint8_t hw_endpoint_in;
        uint8_t needs_ep_type;
        uint8_t needs_in:1;
        uint8_t needs_out:1;
};
 
/*
 * The following structure is used when trying to allocate hardware
 * endpoints for an USB configuration in USB device side mode.
 */
struct usb_hw_ep_scratch {
        struct usb_hw_ep_scratch_sub ep[USB_EP_MAX];
        struct usb_hw_ep_scratch_sub *ep_max;
        struct usb_config_descriptor *cd;
        struct usb_device *udev;
        const struct usb_bus_methods *methods;
        uint8_t bmOutAlloc[(USB_EP_MAX + 15) / 16];
        uint8_t bmInAlloc[(USB_EP_MAX + 15) / 16];
};
 
/*
 * The following structure is used when generating USB descriptors
 * from USB templates.
 */
struct usb_temp_setup {
        void   *buf;
        usb_size_t size;
        enum usb_dev_speed      usb_speed;
        uint8_t self_powered;
        uint8_t bNumEndpoints;
        uint8_t bInterfaceNumber;
        uint8_t bAlternateSetting;
        uint8_t bConfigurationValue;
        usb_error_t err;
};
 
/* 
 * The scratch area for USB devices. Access to this structure is
 * protected by the control SX lock.
 */
union usb_device_scratch {
        struct usb_hw_ep_scratch hw_ep_scratch[1];
        struct usb_temp_setup temp_setup[1];
        struct {
                struct usb_xfer dummy;
                struct usb_setup_params parm;
        } xfer_setup[1];
        uint8_t data[255];
};
 
/*
 * Helper structure to keep track of USB device statistics.
 */
struct usb_device_statistics {
        uint32_t uds_requests[4];
};
 
/*
 * The following structure defines an USB device. There exists one of
 * these structures for every USB device.
 */
struct usb_device {
        /* statistics */
        struct usb_device_statistics stats_err;
        struct usb_device_statistics stats_ok;
        struct usb_device_statistics stats_cancelled;
 
        /* generic clear stall message */
        struct usb_udev_msg cs_msg[2];
        struct sx enum_sx;
        struct sx sr_sx;
        struct sx ctrl_sx;
        struct mtx device_mtx;
        struct cv ctrlreq_cv;
        struct cv ref_cv;
#if (USB_HAVE_FIXED_IFACE == 0)
        struct usb_interface *ifaces;
#else
        struct usb_interface ifaces[USB_IFACE_MAX];
#endif
        struct usb_endpoint ctrl_ep;    /* Control Endpoint 0 */
#if (USB_HAVE_FIXED_ENDPOINT == 0)
        struct usb_endpoint *endpoints;
#else
        struct usb_endpoint endpoints[USB_MAX_EP_UNITS];
#endif
        struct usb_power_save pwr_save;/* power save data */
        struct usb_bus *bus;            /* our USB BUS */
        device_t parent_dev;            /* parent device */
        struct usb_device *parent_hub;
        struct usb_device *parent_hs_hub;       /* high-speed parent HUB */
        struct usb_config_descriptor *cdesc;    /* full config descr */
        struct usb_hub *hub;            /* only if this is a hub */
        struct usb_xfer *ctrl_xfer[USB_CTRL_XFER_MAX];
        struct usb_temp_data *usb_template_ptr;
        struct usb_endpoint *ep_curr;   /* current clear stall endpoint */
#if USB_HAVE_UGEN
        struct usb_fifo *fifo[USB_FIFO_MAX];
        struct usb_symlink *ugen_symlink;       /* our generic symlink */
        struct usb_fs_privdata *ctrl_dev;       /* Control Endpoint 0 device node */
        LIST_HEAD(,usb_fs_privdata) pd_list;
        char    ugen_name[20];          /* name of ugenX.X device */
#endif
        usb_ticks_t plugtime;           /* copy of "ticks" */
 
        enum usb_dev_state state;
        enum usb_dev_speed speed;
        uint16_t refcount;
#define USB_DEV_REF_MAX 0xffff
 
        uint16_t power;                 /* mA the device uses */
        uint16_t langid;                /* language for strings */
        uint16_t autoQuirk[USB_MAX_AUTO_QUIRK];         /* dynamic quirks */
 
        uint8_t address;                /* device addess */
        uint8_t device_index;           /* device index in "bus->devices" */
        uint8_t controller_slot_id;     /* controller specific value */
        uint8_t next_config_index;      /* used by USB_RE_ENUM_SET_CONFIG */
        uint8_t curr_config_index;      /* current configuration index */
        uint8_t curr_config_no;         /* current configuration number */
        uint8_t depth;                  /* distance from root HUB */
        uint8_t port_index;             /* parent HUB port index */
        uint8_t port_no;                /* parent HUB port number */
        uint8_t hs_hub_addr;            /* high-speed HUB address */
        uint8_t hs_port_no;             /* high-speed HUB port number */
        uint8_t driver_added_refcount;  /* our driver added generation count */
        uint8_t power_mode;             /* see USB_POWER_XXX */
        uint8_t re_enumerate_wait;      /* set if re-enum. is in progress */
#define USB_RE_ENUM_DONE        0
#define USB_RE_ENUM_START       1
#define USB_RE_ENUM_PWR_OFF     2
#define USB_RE_ENUM_SET_CONFIG  3
        uint8_t ifaces_max;             /* number of interfaces present */
        uint8_t endpoints_max;          /* number of endpoints present */
 
        /* the "flags" field is write-protected by "bus->mtx" */
 
        struct usb_device_flags flags;
 
        struct usb_endpoint_descriptor ctrl_ep_desc;    /* for endpoint 0 */
        struct usb_endpoint_ss_comp_descriptor ctrl_ep_comp_desc;       /* for endpoint 0 */
        struct usb_device_descriptor ddesc;     /* device descriptor */
 
        char    *serial;                /* serial number, can be NULL */
        char    *manufacturer;          /* manufacturer string, can be NULL */
        char    *product;               /* product string, can be NULL */
 
#if USB_HAVE_COMPAT_LINUX
        /* Linux compat */
        struct usb_device_descriptor descriptor;
        struct usb_host_endpoint ep0;
        struct usb_interface *linux_iface_start;
        struct usb_interface *linux_iface_end;
        struct usb_host_endpoint *linux_endpoint_start;
        struct usb_host_endpoint *linux_endpoint_end;
        uint16_t devnum;
#endif
 
        uint32_t clear_stall_errors;    /* number of clear-stall failures */
 
        union usb_device_scratch scratch;
 
#if (USB_HAVE_FIXED_CONFIG != 0)
        uint32_t config_data[(USB_CONFIG_MAX + 3) / 4];
#endif
};
 
/* globals */
 
extern int usb_template;
 
/* function prototypes */
 
const char *usb_statestr(enum usb_dev_state state);
struct usb_device *usb_alloc_device(device_t parent_dev, struct usb_bus *bus,
                    struct usb_device *parent_hub, uint8_t depth,
                    uint8_t port_index, uint8_t port_no,
                    enum usb_dev_speed speed, enum usb_hc_mode mode);
#if USB_HAVE_UGEN
struct usb_fs_privdata *usb_make_dev(struct usb_device *, const char *,
                    int, int, int, uid_t, gid_t, int);
void    usb_destroy_dev(struct usb_fs_privdata *);
void    usb_destroy_dev_sync(struct usb_fs_privdata *);
#endif
usb_error_t     usb_probe_and_attach(struct usb_device *udev,
                    uint8_t iface_index);
void            usb_detach_device(struct usb_device *, uint8_t, uint8_t);
usb_error_t     usb_reset_iface_endpoints(struct usb_device *udev,
                    uint8_t iface_index);
usb_error_t     usbd_set_config_index(struct usb_device *udev, uint8_t index);
usb_error_t     usbd_set_endpoint_stall(struct usb_device *udev,
                    struct usb_endpoint *ep, uint8_t do_stall);
usb_error_t     usb_suspend_resume(struct usb_device *udev,
                    uint8_t do_suspend);
void    usb_devinfo(struct usb_device *udev, char *dst_ptr, uint16_t dst_len);
void    usb_free_device(struct usb_device *, uint8_t);
void    usb_linux_free_device(struct usb_device *dev);
uint8_t usb_peer_can_wakeup(struct usb_device *udev);
struct usb_endpoint *usb_endpoint_foreach(struct usb_device *udev, struct usb_endpoint *ep);
void    usb_set_device_state(struct usb_device *, enum usb_dev_state);
enum usb_dev_state usb_get_device_state(struct usb_device *);
 
void    usb_set_device_strings(struct usb_device *);
void    usb_get_langid(struct usb_device *);
 
uint8_t usbd_enum_lock(struct usb_device *);
#if USB_HAVE_UGEN
uint8_t usbd_enum_lock_sig(struct usb_device *);
#endif
void    usbd_enum_unlock(struct usb_device *);
void    usbd_sr_lock(struct usb_device *);
void    usbd_sr_unlock(struct usb_device *);
uint8_t usbd_ctrl_lock(struct usb_device *);
void    usbd_ctrl_unlock(struct usb_device *);
uint8_t usbd_enum_is_locked(struct usb_device *);
 
#if USB_HAVE_TT_SUPPORT
void    uhub_tt_buffer_reset_async_locked(struct usb_device *, struct usb_endpoint *);
#endif
 
uint8_t uhub_count_active_host_ports(struct usb_device *, enum usb_dev_speed);
 
#endif                                  /* _USB_DEVICE_H_ */