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usb: gadget: add SuperSpeed support to the Gadget Framework

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SuperSpeed USB has defined a new descriptor, called
the Binary Device Object Store (BOS) Descriptor. It
has also changed a bit the definition of SET_FEATURE
and GET_STATUS requests to add USB3-specific details.

This patch implements both changes to the Composite
Gadget Framework.

[ balbi@ti.com : slight changes to commit log
		 fixed a compile error on ARM ]

Signed-off-by: Tatyana Brokhman <tlinder@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tatyana Brokhman
2011-06-29 16:41:50 +03:00
committed by Greg Kroah-Hartman
parent 35a0e0bf6f
commit bdb64d7272
5 changed files with 293 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/linux/usb/composite.h
View File

@@ -59,6 +59,10 @@ struct usb_configuration;
* @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.
* @ss_descriptors: Table of super speed descriptors, using interface and
* string identifiers assigned during @bind(). If this
* pointer is null after initiation, the function will not
* be available at super speed.
* @config: assigned when @usb_add_function() is called; this is the
* configuration with which this function is associated.
* @bind: Before the gadget can register, all of its functions bind() to the
@@ -77,6 +81,10 @@ struct usb_configuration;
* @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.
* @get_status: Returns function status as a reply to
* GetStatus() request when the recepient is Interface.
* @func_suspend: callback to be called when
* SetFeature(FUNCTION_SUSPEND) is reseived
*
* 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
@@ -106,6 +114,7 @@ struct usb_function {
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;
@@ -132,6 +141,10 @@ struct usb_function {
void (*suspend)(struct usb_function *);
void (*resume)(struct usb_function *);
/* USB 3.0 additions */
int (*get_status)(struct usb_function *);
int (*func_suspend)(struct usb_function *,
u8 suspend_opt);
/* private: */
/* internals */
struct list_head list;
@@ -219,6 +232,7 @@ struct usb_configuration {
struct list_head list;
struct list_head functions;
u8 next_interface_id;
unsigned superspeed:1;
unsigned highspeed:1;
unsigned fullspeed:1;
struct usb_function *interface[MAX_CONFIG_INTERFACES];

31
include/linux/usb/gadget.h
View File

@@ -136,6 +136,8 @@ struct usb_ep_ops {
* the endpoint descriptor used to configure the endpoint.
* @max_streams: The maximum number of streams supported
* by this EP (0 - 16, actual number is 2^n)
* @mult: multiplier, 'mult' value for SS Isoc EPs
* @maxburst: the maximum number of bursts supported by this EP (for usb3)
* @driver_data:for use by the gadget driver.
* @address: used to identify the endpoint when finding descriptor that
* matches connection speed
@@ -156,6 +158,8 @@ struct usb_ep {
struct list_head ep_list;
unsigned maxpacket:16;
unsigned max_streams:16;
unsigned mult:2;
unsigned maxburst:4;
u8 address;
const struct usb_endpoint_descriptor *desc;
const struct usb_ss_ep_comp_descriptor *comp_desc;
@@ -426,6 +430,14 @@ static inline void usb_ep_fifo_flush(struct usb_ep *ep)
/*-------------------------------------------------------------------------*/
struct usb_dcd_config_params {
__u8 bU1devExitLat; /* U1 Device exit Latency */
#define USB_DEFULT_U1_DEV_EXIT_LAT 0x01 /* Less then 1 microsec */
__le16 bU2DevExitLat; /* U2 Device exit Latency */
#define USB_DEFULT_U2_DEV_EXIT_LAT 0x1F4 /* Less then 500 microsec */
};
struct usb_gadget;
struct usb_gadget_driver;
@@ -441,6 +453,7 @@ struct usb_gadget_ops {
int (*pullup) (struct usb_gadget *, int is_on);
int (*ioctl)(struct usb_gadget *,
unsigned code, unsigned long param);
void (*get_config_params)(struct usb_dcd_config_params *);
int (*start)(struct usb_gadget_driver *,
int (*bind)(struct usb_gadget *));
int (*stop)(struct usb_gadget_driver *);
@@ -534,6 +547,24 @@ static inline int gadget_is_dualspeed(struct usb_gadget *g)
#endif
}
/**
* gadget_is_superspeed() - return true if the hardware handles
* supperspeed
* @g: controller that might support supper speed
*/
static inline int gadget_is_superspeed(struct usb_gadget *g)
{
#ifdef CONFIG_USB_GADGET_SUPERSPEED
/*
* runtime test would check "g->is_superspeed" ... that might be
* useful to work around hardware bugs, but is mostly pointless
*/
return 1;
#else
return 0;
#endif
}
/**
* gadget_is_otg - return true iff the hardware is OTG-ready
* @g: controller that might have a Mini-AB connector