mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-22 11:13:07 +00:00
8745b9ebcc
This patch is to add usb gadget super speed support in common driver, including BOS descriptor and select the super speed descriptor from function driver. Reviewed-by: Ye Li <ye.li@nxp.com> Reviewed-by: Peter Chen <peter.chen@nxp.com> Tested-by: faqiang.zhu <faqiang.zhu@nxp.com> Signed-off-by: Li Jun <jun.li@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com>
417 lines
17 KiB
C
417 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* composite.h -- framework for usb gadgets which are composite devices
|
|
*
|
|
* Copyright (C) 2006-2008 David Brownell
|
|
*/
|
|
|
|
#ifndef __LINUX_USB_COMPOSITE_H
|
|
#define __LINUX_USB_COMPOSITE_H
|
|
|
|
/*
|
|
* This framework is an optional layer on top of the USB Gadget interface,
|
|
* making it easier to build (a) Composite devices, supporting multiple
|
|
* functions within any single configuration, and (b) Multi-configuration
|
|
* devices, also supporting multiple functions but without necessarily
|
|
* having more than one function per configuration.
|
|
*
|
|
* Example: a device with a single configuration supporting both network
|
|
* link and mass storage functions is a composite device. Those functions
|
|
* might alternatively be packaged in individual configurations, but in
|
|
* the composite model the host can use both functions at the same time.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <linux/usb/ch9.h>
|
|
#include <linux/usb/gadget.h>
|
|
#include <linux/bitmap.h>
|
|
|
|
/*
|
|
* USB function drivers should return USB_GADGET_DELAYED_STATUS if they
|
|
* wish to delay the data/status stages of the control transfer till they
|
|
* are ready. The control transfer will then be kept from completing till
|
|
* all the function drivers that requested for USB_GADGET_DELAYED_STAUS
|
|
* invoke usb_composite_setup_continue().
|
|
*/
|
|
#define USB_GADGET_DELAYED_STATUS 0x7fff /* Impossibly large value */
|
|
|
|
struct usb_configuration;
|
|
|
|
/**
|
|
* struct usb_os_desc_ext_prop - describes one "Extended Property"
|
|
* @entry: used to keep a list of extended properties
|
|
* @type: Extended Property type
|
|
* @name_len: Extended Property unicode name length, including terminating '\0'
|
|
* @name: Extended Property name
|
|
* @data_len: Length of Extended Property blob (for unicode store double len)
|
|
* @data: Extended Property blob
|
|
*/
|
|
struct usb_os_desc_ext_prop {
|
|
struct list_head entry;
|
|
u8 type;
|
|
int name_len;
|
|
char *name;
|
|
int data_len;
|
|
char *data;
|
|
};
|
|
|
|
/**
|
|
* struct usb_os_desc - describes OS descriptors associated with one interface
|
|
* @ext_compat_id: 16 bytes of "Compatible ID" and "Subcompatible ID"
|
|
* @ext_prop: Extended Properties list
|
|
* @ext_prop_len: Total length of Extended Properties blobs
|
|
* @ext_prop_count: Number of Extended Properties
|
|
*/
|
|
struct usb_os_desc {
|
|
char *ext_compat_id;
|
|
struct list_head ext_prop;
|
|
int ext_prop_len;
|
|
int ext_prop_count;
|
|
};
|
|
|
|
/**
|
|
* struct usb_os_desc_table - describes OS descriptors associated with one
|
|
* interface of a usb_function
|
|
* @if_id: Interface id
|
|
* @os_desc: "Extended Compatibility ID" and "Extended Properties" of the
|
|
* interface
|
|
*
|
|
* Each interface can have at most one "Extended Compatibility ID" and a
|
|
* number of "Extended Properties".
|
|
*/
|
|
struct usb_os_desc_table {
|
|
int if_id;
|
|
struct usb_os_desc *os_desc;
|
|
};
|
|
|
|
/**
|
|
* struct usb_function - describes one function of a configuration
|
|
* @name: For diagnostics, identifies the function.
|
|
* @strings: tables of strings, keyed by identifiers assigned during bind()
|
|
* and by language IDs provided in control requests
|
|
* @descriptors: Table of full (or low) speed descriptors, using interface and
|
|
* string identifiers assigned during @bind(). If this pointer is null,
|
|
* the function will not be available at full speed (or at low speed).
|
|
* @hs_descriptors: Table of high speed descriptors, using interface and
|
|
* string identifiers assigned during @bind(). If this pointer is null,
|
|
* the function will not be available at high speed.
|
|
* @config: assigned when @usb_add_function() is called; this is the
|
|
* configuration with which this function is associated.
|
|
* @os_desc_table: Table of (interface id, os descriptors) pairs. The function
|
|
* can expose more than one interface. If an interface is a member of
|
|
* an IAD, only the first interface of IAD has its entry in the table.
|
|
* @os_desc_n: Number of entries in os_desc_table
|
|
* @bind: Before the gadget can register, all of its functions bind() to the
|
|
* available resources including string and interface identifiers used
|
|
* in interface or class descriptors; endpoints; I/O buffers; and so on.
|
|
* @unbind: Reverses @bind; called as a side effect of unregistering the
|
|
* driver which added this function.
|
|
* @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may
|
|
* initialize usb_ep.driver data at this time (when it is used).
|
|
* Note that setting an interface to its current altsetting resets
|
|
* interface state, and that all interfaces have a disabled state.
|
|
* @get_alt: Returns the active altsetting. If this is not provided,
|
|
* then only altsetting zero is supported.
|
|
* @disable: (REQUIRED) Indicates the function should be disabled. Reasons
|
|
* include host resetting or reconfiguring the gadget, and disconnection.
|
|
* @setup: Used for interface-specific control requests.
|
|
* @suspend: Notifies functions when the host stops sending USB traffic.
|
|
* @resume: Notifies functions when the host restarts USB traffic.
|
|
*
|
|
* A single USB function uses one or more interfaces, and should in most
|
|
* cases support operation at both full and high speeds. Each function is
|
|
* associated by @usb_add_function() with a one configuration; that function
|
|
* causes @bind() to be called so resources can be allocated as part of
|
|
* setting up a gadget driver. Those resources include endpoints, which
|
|
* should be allocated using @usb_ep_autoconfig().
|
|
*
|
|
* To support dual speed operation, a function driver provides descriptors
|
|
* for both high and full speed operation. Except in rare cases that don't
|
|
* involve bulk endpoints, each speed needs different endpoint descriptors.
|
|
*
|
|
* Function drivers choose their own strategies for managing instance data.
|
|
* The simplest strategy just declares it "static', which means the function
|
|
* can only be activated once. If the function needs to be exposed in more
|
|
* than one configuration at a given speed, it needs to support multiple
|
|
* usb_function structures (one for each configuration).
|
|
*
|
|
* A more complex strategy might encapsulate a @usb_function structure inside
|
|
* a driver-specific instance structure to allows multiple activations. An
|
|
* example of multiple activations might be a CDC ACM function that supports
|
|
* two or more distinct instances within the same configuration, providing
|
|
* several independent logical data links to a USB host.
|
|
*/
|
|
struct usb_function {
|
|
const char *name;
|
|
struct usb_gadget_strings **strings;
|
|
struct usb_descriptor_header **descriptors;
|
|
struct usb_descriptor_header **hs_descriptors;
|
|
struct usb_descriptor_header **ss_descriptors;
|
|
|
|
struct usb_configuration *config;
|
|
|
|
struct usb_os_desc_table *os_desc_table;
|
|
unsigned os_desc_n;
|
|
|
|
/* REVISIT: bind() functions can be marked __init, which
|
|
* makes trouble for section mismatch analysis. See if
|
|
* we can't restructure things to avoid mismatching.
|
|
* Related: unbind() may kfree() but bind() won't...
|
|
*/
|
|
|
|
/* configuration management: bind/unbind */
|
|
int (*bind)(struct usb_configuration *,
|
|
struct usb_function *);
|
|
void (*unbind)(struct usb_configuration *,
|
|
struct usb_function *);
|
|
|
|
/* runtime state management */
|
|
int (*set_alt)(struct usb_function *,
|
|
unsigned interface, unsigned alt);
|
|
int (*get_alt)(struct usb_function *,
|
|
unsigned interface);
|
|
void (*disable)(struct usb_function *);
|
|
int (*setup)(struct usb_function *,
|
|
const struct usb_ctrlrequest *);
|
|
void (*suspend)(struct usb_function *);
|
|
void (*resume)(struct usb_function *);
|
|
|
|
/* private: */
|
|
/* internals */
|
|
struct list_head list;
|
|
DECLARE_BITMAP(endpoints, 32);
|
|
};
|
|
|
|
int usb_add_function(struct usb_configuration *, struct usb_function *);
|
|
|
|
int usb_function_deactivate(struct usb_function *);
|
|
int usb_function_activate(struct usb_function *);
|
|
|
|
int usb_interface_id(struct usb_configuration *, struct usb_function *);
|
|
|
|
/**
|
|
* ep_choose - select descriptor endpoint at current device speed
|
|
* @g: gadget, connected and running at some speed
|
|
* @hs: descriptor to use for high speed operation
|
|
* @fs: descriptor to use for full or low speed operation
|
|
*/
|
|
static inline struct usb_endpoint_descriptor *
|
|
ep_choose(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
|
|
struct usb_endpoint_descriptor *fs)
|
|
{
|
|
if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
|
|
return hs;
|
|
return fs;
|
|
}
|
|
|
|
#define MAX_CONFIG_INTERFACES 16 /* arbitrary; max 255 */
|
|
|
|
/**
|
|
* struct usb_configuration - represents one gadget configuration
|
|
* @label: For diagnostics, describes the configuration.
|
|
* @strings: Tables of strings, keyed by identifiers assigned during @bind()
|
|
* and by language IDs provided in control requests.
|
|
* @descriptors: Table of descriptors preceding all function descriptors.
|
|
* Examples include OTG and vendor-specific descriptors.
|
|
* @bind: Called from @usb_add_config() to allocate resources unique to this
|
|
* configuration and to call @usb_add_function() for each function used.
|
|
* @unbind: Reverses @bind; called as a side effect of unregistering the
|
|
* driver which added this configuration.
|
|
* @setup: Used to delegate control requests that aren't handled by standard
|
|
* device infrastructure or directed at a specific interface.
|
|
* @bConfigurationValue: Copied into configuration descriptor.
|
|
* @iConfiguration: Copied into configuration descriptor.
|
|
* @bmAttributes: Copied into configuration descriptor.
|
|
* @bMaxPower: Copied into configuration descriptor.
|
|
* @cdev: assigned by @usb_add_config() before calling @bind(); this is
|
|
* the device associated with this configuration.
|
|
*
|
|
* Configurations are building blocks for gadget drivers structured around
|
|
* function drivers. Simple USB gadgets require only one function and one
|
|
* configuration, and handle dual-speed hardware by always providing the same
|
|
* functionality. Slightly more complex gadgets may have more than one
|
|
* single-function configuration at a given speed; or have configurations
|
|
* that only work at one speed.
|
|
*
|
|
* Composite devices are, by definition, ones with configurations which
|
|
* include more than one function.
|
|
*
|
|
* The lifecycle of a usb_configuration includes allocation, initialization
|
|
* of the fields described above, and calling @usb_add_config() to set up
|
|
* internal data and bind it to a specific device. The configuration's
|
|
* @bind() method is then used to initialize all the functions and then
|
|
* call @usb_add_function() for them.
|
|
*
|
|
* Those functions would normally be independant of each other, but that's
|
|
* not mandatory. CDC WMC devices are an example where functions often
|
|
* depend on other functions, with some functions subsidiary to others.
|
|
* Such interdependency may be managed in any way, so long as all of the
|
|
* descriptors complete by the time the composite driver returns from
|
|
* its bind() routine.
|
|
*/
|
|
struct usb_configuration {
|
|
const char *label;
|
|
struct usb_gadget_strings **strings;
|
|
const struct usb_descriptor_header **descriptors;
|
|
|
|
/* REVISIT: bind() functions can be marked __init, which
|
|
* makes trouble for section mismatch analysis. See if
|
|
* we can't restructure things to avoid mismatching...
|
|
*/
|
|
|
|
/* configuration management: bind/unbind */
|
|
int (*bind)(struct usb_configuration *);
|
|
void (*unbind)(struct usb_configuration *);
|
|
int (*setup)(struct usb_configuration *,
|
|
const struct usb_ctrlrequest *);
|
|
|
|
/* fields in the config descriptor */
|
|
u8 bConfigurationValue;
|
|
u8 iConfiguration;
|
|
u8 bmAttributes;
|
|
u8 bMaxPower;
|
|
|
|
struct usb_composite_dev *cdev;
|
|
|
|
/* private: */
|
|
/* internals */
|
|
struct list_head list;
|
|
struct list_head functions;
|
|
u8 next_interface_id;
|
|
unsigned highspeed:1;
|
|
unsigned fullspeed:1;
|
|
unsigned superspeed:1;
|
|
struct usb_function *interface[MAX_CONFIG_INTERFACES];
|
|
};
|
|
|
|
int usb_add_config(struct usb_composite_dev *,
|
|
struct usb_configuration *);
|
|
|
|
/**
|
|
* struct usb_composite_driver - groups configurations into a gadget
|
|
* @name: For diagnostics, identifies the driver.
|
|
* @dev: Template descriptor for the device, including default device
|
|
* identifiers.
|
|
* @strings: tables of strings, keyed by identifiers assigned during bind()
|
|
* and language IDs provided in control requests
|
|
* @max_speed: Highest speed the driver supports.
|
|
* @bind: (REQUIRED) Used to allocate resources that are shared across the
|
|
* whole device, such as string IDs, and add its configurations using
|
|
* @usb_add_config(). This may fail by returning a negative errno
|
|
* value; it should return zero on successful initialization.
|
|
* @unbind: Reverses @bind(); called as a side effect of unregistering
|
|
* this driver.
|
|
* @disconnect: optional driver disconnect method
|
|
* @suspend: Notifies when the host stops sending USB traffic,
|
|
* after function notifications
|
|
* @resume: Notifies configuration when the host restarts USB traffic,
|
|
* before function notifications
|
|
*
|
|
* Devices default to reporting self powered operation. Devices which rely
|
|
* on bus powered operation should report this in their @bind() method.
|
|
*
|
|
* Before returning from @bind, various fields in the template descriptor
|
|
* may be overridden. These include the idVendor/idProduct/bcdDevice values
|
|
* normally to bind the appropriate host side driver, and the three strings
|
|
* (iManufacturer, iProduct, iSerialNumber) normally used to provide user
|
|
* meaningful device identifiers. (The strings will not be defined unless
|
|
* they are defined in @dev and @strings.) The correct ep0 maxpacket size
|
|
* is also reported, as defined by the underlying controller driver.
|
|
*/
|
|
struct usb_composite_driver {
|
|
const char *name;
|
|
const struct usb_device_descriptor *dev;
|
|
struct usb_gadget_strings **strings;
|
|
enum usb_device_speed max_speed;
|
|
|
|
/* REVISIT: bind() functions can be marked __init, which
|
|
* makes trouble for section mismatch analysis. See if
|
|
* we can't restructure things to avoid mismatching...
|
|
*/
|
|
|
|
int (*bind)(struct usb_composite_dev *);
|
|
int (*unbind)(struct usb_composite_dev *);
|
|
|
|
void (*disconnect)(struct usb_composite_dev *);
|
|
|
|
/* global suspend hooks */
|
|
void (*suspend)(struct usb_composite_dev *);
|
|
void (*resume)(struct usb_composite_dev *);
|
|
};
|
|
|
|
extern int usb_composite_register(struct usb_composite_driver *);
|
|
extern void usb_composite_unregister(struct usb_composite_driver *);
|
|
|
|
#define OS_STRING_QW_SIGN_LEN 14
|
|
#define OS_STRING_IDX 0xEE
|
|
|
|
/**
|
|
* struct usb_composite_device - represents one composite usb gadget
|
|
* @gadget: read-only, abstracts the gadget's usb peripheral controller
|
|
* @req: used for control responses; buffer is pre-allocated
|
|
* @bufsiz: size of buffer pre-allocated in @req
|
|
* @os_desc_req: used for OS descriptors responses; buffer is pre-allocated
|
|
* @config: the currently active configuration
|
|
* @qw_sign: qwSignature part of the OS string
|
|
* @b_vendor_code: bMS_VendorCode part of the OS string
|
|
* @use_os_string: false by default, interested gadgets set it
|
|
* @os_desc_config: the configuration to be used with OS descriptors
|
|
*
|
|
* One of these devices is allocated and initialized before the
|
|
* associated device driver's bind() is called.
|
|
*
|
|
* OPEN ISSUE: it appears that some WUSB devices will need to be
|
|
* built by combining a normal (wired) gadget with a wireless one.
|
|
* This revision of the gadget framework should probably try to make
|
|
* sure doing that won't hurt too much.
|
|
*
|
|
* One notion for how to handle Wireless USB devices involves:
|
|
* (a) a second gadget here, discovery mechanism TBD, but likely
|
|
* needing separate "register/unregister WUSB gadget" calls;
|
|
* (b) updates to usb_gadget to include flags "is it wireless",
|
|
* "is it wired", plus (presumably in a wrapper structure)
|
|
* bandgroup and PHY info;
|
|
* (c) presumably a wireless_ep wrapping a usb_ep, and reporting
|
|
* wireless-specific parameters like maxburst and maxsequence;
|
|
* (d) configurations that are specific to wireless links;
|
|
* (e) function drivers that understand wireless configs and will
|
|
* support wireless for (additional) function instances;
|
|
* (f) a function to support association setup (like CBAF), not
|
|
* necessarily requiring a wireless adapter;
|
|
* (g) composite device setup that can create one or more wireless
|
|
* configs, including appropriate association setup support;
|
|
* (h) more, TBD.
|
|
*/
|
|
struct usb_composite_dev {
|
|
struct usb_gadget *gadget;
|
|
struct usb_request *req;
|
|
unsigned bufsiz;
|
|
|
|
struct usb_configuration *config;
|
|
|
|
/* OS String is a custom (yet popular) extension to the USB standard. */
|
|
u8 qw_sign[OS_STRING_QW_SIGN_LEN];
|
|
u8 b_vendor_code;
|
|
struct usb_configuration *os_desc_config;
|
|
unsigned int use_os_string:1;
|
|
|
|
/* private: */
|
|
/* internals */
|
|
unsigned int suspended:1;
|
|
struct usb_device_descriptor __aligned(CONFIG_SYS_CACHELINE_SIZE) desc;
|
|
struct list_head configs;
|
|
struct usb_composite_driver *driver;
|
|
u8 next_string_id;
|
|
|
|
/* the gadget driver won't enable the data pullup
|
|
* while the deactivation count is nonzero.
|
|
*/
|
|
unsigned deactivations;
|
|
};
|
|
|
|
extern int usb_string_id(struct usb_composite_dev *c);
|
|
extern int usb_string_ids_tab(struct usb_composite_dev *c,
|
|
struct usb_string *str);
|
|
extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n);
|
|
|
|
#endif /* __LINUX_USB_COMPOSITE_H */
|