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Message-Id: <1286092937-29191-1-git-send-email-tlinder@codeaurora.org>
Date: Sun, 3 Oct 2010 10:02:15 +0200
From: tlinder <tlinder@...eaurora.org>
To: linux-usb@...r.kernel.org
Cc: Tatyana Linder <tlinder@...eaurora.org>,
David Brownell <dbrownell@...rs.sourceforge.net>,
Greg Kroah-Hartman <gregkh@...e.de>,
Michal Nazarewicz <m.nazarewicz@...sung.com>,
Randy Dunlap <randy.dunlap@...cle.com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Robert Lukassen <robert.lukassen@...tom.com>,
Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
Matthew Wilcox <willy@...ux.intel.com>,
Fabien Chouteau <fabien.chouteau@...co.com>,
Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: [RFC/PATCH 2/2] usb:gadget: Add SuperSpeed support to the Gadget Framework
From: Tatyana Linder <tlinder@...eaurora.org>
This patch adds the SuperSpeed functionality to the gadget framework.
In order not to force all the FDs to supply SuperSpeed descriptors when
operating in SuperSpeed mode the following approach was taken:
If we're operating in SuperSpeed mode and the FD didn't supply SuperSpeed
descriptors, the composite layer will automatically create SuperSpeed
descriptors with default values.
Support for new SuperSpeed BOS descriptor was added.
Support for SET_FEATURE and GET_STATUS requests in SuperSpeed mode was
added.
Signed-off-by: Tatyana Linder <tlinder@...eaurora.org>
---
This patch was verified by USBCV 3.0 and 2.0.
drivers/usb/gadget/Kconfig | 20 ++-
drivers/usb/gadget/composite.c | 319 +++++++++++++++++++++++++++++++++++++---
include/linux/usb/ch9.h | 54 +++++++-
include/linux/usb/composite.h | 24 +++
include/linux/usb/gadget.h | 19 +++
5 files changed, 407 insertions(+), 29 deletions(-)
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index cd27f9b..9afdd08 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -520,11 +520,11 @@ config USB_GADGET_DUMMY_HCD
side is the master; the gadget side is the slave. Gadget drivers
can be high, full, or low speed; and they have access to endpoints
like those from NET2280, PXA2xx, or SA1100 hardware.
-
+
This may help in some stages of creating a driver to embed in a
Linux device, since it lets you debug several parts of the gadget
driver without its hardware or drivers being involved.
-
+
Since such a gadget side driver needs to interoperate with a host
side Linux-USB device driver, this may help to debug both sides
of a USB protocol stack.
@@ -552,6 +552,18 @@ config USB_GADGET_DUALSPEED
Means that gadget drivers should include extra descriptors
and code to handle dual-speed controllers.
+config USB_GADGET_SUPERSPEED
+ boolean "Gadget opperating in Super Speed"
+ depends on USB_GADGET
+ depends on USB_GADGET_DUALSPEED
+ default n
+ help
+ Enabling this feature enables Super Speed support in the Gadget
+ driver. It means that gadget drivers should include extra (SuperSpeed)
+ descriptors.
+ For composite devices: if SupeSpeed descriptors weren't supplied by
+ the FD, they will be automatically generated with default values.
+
#
# USB Gadget Drivers
#
@@ -633,7 +645,7 @@ config USB_ETH
help
This driver implements Ethernet style communication, in one of
several ways:
-
+
- The "Communication Device Class" (CDC) Ethernet Control Model.
That protocol is often avoided with pure Ethernet adapters, in
favor of simpler vendor-specific hardware, but is widely
@@ -673,7 +685,7 @@ config USB_ETH_RNDIS
If you say "y" here, the Ethernet gadget driver will try to provide
a second device configuration, supporting RNDIS to talk to such
Microsoft USB hosts.
-
+
To make MS-Windows work with this, use Documentation/usb/linux.inf
as the "driver info file". For versions of MS-Windows older than
XP, you'll need to download drivers from Microsoft's website; a URL
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index c619c80..a5dcfe1 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -70,6 +70,102 @@ static char *iSerialNumber;
module_param(iSerialNumber, charp, 0);
MODULE_PARM_DESC(iSerialNumber, "SerialNumber string");
+/** Default endpoint companion descriptor */
+static struct usb_ss_ep_comp_descriptor ep_comp_desc = {
+ .bDescriptorType = USB_DT_SS_ENDPOINT_COMP,
+ .bLength = 0x06,
+ .bMaxBurst = 0, /*the default is we don't support bursting*/
+ .bmAttributes = 0, /*2^0 streams supported*/
+ .wBytesPerInterval = 0,
+};
+
+/**This function receives a pointer to usb_function and adds
+ * missing super speed descriptors in the ss_descriptor field
+ * according to its hs_descriptors field.
+ *
+ * In more details: this function copies f->hs_descriptors while
+ * updating the endpoint descriptor and adding endpoint
+ * companion descriptor
+ */
+static void create_ss_descriptors(struct usb_function *f)
+{
+ unsigned bytes; /*number of bytes to allocate*/
+ unsigned n_desc; /* number of descriptors*/
+ void *mem; /*allocated memory to copy to*/
+ struct usb_descriptor_header **tmp;
+ struct usb_endpoint_descriptor *ep_desc ;
+ struct usb_descriptor_header **src = f->hs_descriptors;
+
+ if (!f->hs_descriptors)
+ return;
+
+ /* Count number of EPs (in order to know how many SS_EP_COMPANION
+ descriptors to add), the total number of descriptors and the sum of
+ each descriptor bLength field in order to know how much memory to
+ allocate*/
+ for (bytes = 0, n_desc = 0, tmp = src; *tmp; tmp++, n_desc++) {
+ if ((*tmp)->bDescriptorType == USB_DT_ENDPOINT) {
+ bytes += ep_comp_desc.bLength;
+ n_desc++;
+ }
+ bytes += (*tmp)->bLength;
+ }
+
+ bytes += (n_desc + 1) * sizeof(*tmp);
+ mem = kmalloc(bytes, GFP_KERNEL);
+ if (!mem)
+ return;
+
+ /* fill in pointers starting at "tmp",
+ * to descriptors copied starting at "mem";
+ * and return "ret"
+ */
+ tmp = mem;
+ f->ss_descriptors = mem;
+ mem += (n_desc + 1) * sizeof(*tmp);
+ while (*src) {
+ /*Copy the original descriptor*/
+ memcpy(mem, *src, (*src)->bLength);
+ switch ((*src)->bDescriptorType) {
+ case USB_DT_ENDPOINT:
+ /*update ep descriptor*/
+ ep_desc = (struct usb_endpoint_descriptor *)mem;
+ switch (ep_desc->bmAttributes &
+ USB_ENDPOINT_XFERTYPE_MASK) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ ep_desc->wMaxPacketSize = 512;
+ ep_desc->bInterval = 0;
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ ep_desc->wMaxPacketSize = 1024;
+ ep_desc->bInterval = 0;
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ case USB_ENDPOINT_XFER_ISOC:
+ break;
+ }
+ *tmp = mem;
+ tmp++;
+ mem += (*src)->bLength;
+ /*add ep companion descriptor*/
+ memcpy(mem, &ep_comp_desc, ep_comp_desc.bLength);
+ *tmp = mem;
+ tmp++;
+ mem += ep_comp_desc.bLength;
+ break;
+ default:
+ *tmp = mem;
+ tmp++;
+ mem += (*src)->bLength;
+ break;
+ }
+ src++;
+ }
+ *tmp = NULL; /*The last (struct usb_descriptor_header *) in the
+ descriptors vector is NULL*/
+ f->ss_desc_allocated = true;
+}
+
/*-------------------------------------------------------------------------*/
/**
* next_ep_desc - advance to the next EP descriptor
@@ -110,6 +206,9 @@ int ep_choose(struct usb_gadget *g, struct usb_function *f, struct usb_ep *_ep)
struct usb_endpoint_descriptor *chosen_desc = NULL;
struct usb_descriptor_header **speed_desc = NULL;
+ struct usb_ss_ep_comp_descriptor *comp_desc = NULL;
+ int want_comp_desc = 0;
+
struct usb_descriptor_header **d_spd; /* cursor for speed desc */
if (!g || !f || !_ep)
@@ -117,6 +216,13 @@ int ep_choose(struct usb_gadget *g, struct usb_function *f, struct usb_ep *_ep)
/* select desired speed */
switch (g->speed) {
+ case USB_SPEED_SUPER:
+ if (gadget_is_superspeed(g)) {
+ speed_desc = f->ss_descriptors;
+ want_comp_desc = 1;
+ break;
+ }
+ /*else: Fall trough*/
case USB_SPEED_HIGH:
if (gadget_is_dualspeed(g)) {
speed_desc = f->hs_descriptors;
@@ -143,7 +249,18 @@ ep_found:
/* commit results */
_ep->maxpacket = chosen_desc->wMaxPacketSize;
_ep->desc = chosen_desc;
-
+ _ep->comp_desc = NULL;
+ if (want_comp_desc) {
+ /**
+ * Companion descriptor should follow EP descriptor
+ * USB 3.0 spec, #9.6.7
+ */
+ comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd);
+ if (!comp_desc ||
+ (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP))
+ return -EIO;
+ _ep->comp_desc = comp_desc;
+ }
return 0;
}
@@ -185,6 +302,12 @@ int usb_add_function(struct usb_configuration *config,
list_del(&function->list);
function->config = NULL;
}
+ /*Add SS descriptors if there are any. This has to be done
+ after the bind since we need the hs_descriptors to be set in
+ usb_function and some of the FDs does it in the bind. */
+ if ((gadget_is_superspeed(config->cdev->gadget)) &&
+ (!function->ss_not_capable) && (!function->ss_descriptors))
+ create_ss_descriptors(function);
} else
value = 0;
@@ -197,6 +320,8 @@ int usb_add_function(struct usb_configuration *config,
config->fullspeed = true;
if (!config->highspeed && function->hs_descriptors)
config->highspeed = true;
+ if (!config->superspeed && function->ss_descriptors)
+ config->superspeed = true;
done:
if (value)
@@ -340,7 +465,9 @@ static int config_buf(struct usb_configuration *config,
list_for_each_entry(f, &config->functions, list) {
struct usb_descriptor_header **descriptors;
- if (speed == USB_SPEED_HIGH)
+ if (speed == USB_SPEED_SUPER)
+ descriptors = f->ss_descriptors;
+ else if (speed == USB_SPEED_HIGH)
descriptors = f->hs_descriptors;
else
descriptors = f->descriptors;
@@ -366,23 +493,26 @@ static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
u8 type = w_value >> 8;
enum usb_device_speed speed = USB_SPEED_UNKNOWN;
- if (gadget_is_dualspeed(gadget)) {
- int hs = 0;
-
+ if (gadget->speed == USB_SPEED_SUPER)
+ speed = gadget->speed;
+ else if (gadget_is_dualspeed(gadget)) {
+ int hs = 0;
if (gadget->speed == USB_SPEED_HIGH)
hs = 1;
if (type == USB_DT_OTHER_SPEED_CONFIG)
hs = !hs;
if (hs)
speed = USB_SPEED_HIGH;
-
}
/* This is a lookup by config *INDEX* */
w_value &= 0xff;
list_for_each_entry(c, &cdev->configs, list) {
/* ignore configs that won't work at this speed */
- if (speed == USB_SPEED_HIGH) {
+ if (speed == USB_SPEED_SUPER) {
+ if (!c->superspeed)
+ continue;
+ } else if (speed == USB_SPEED_HIGH) {
if (!c->highspeed)
continue;
} else {
@@ -402,16 +532,22 @@ static int count_configs(struct usb_composite_dev *cdev, unsigned type)
struct usb_configuration *c;
unsigned count = 0;
int hs = 0;
+ int ss = 0;
if (gadget_is_dualspeed(gadget)) {
if (gadget->speed == USB_SPEED_HIGH)
hs = 1;
+ if (gadget->speed == USB_SPEED_SUPER)
+ ss = 1;
if (type == USB_DT_DEVICE_QUALIFIER)
hs = !hs;
}
list_for_each_entry(c, &cdev->configs, list) {
/* ignore configs that won't work at this speed */
- if (hs) {
+ if (ss) {
+ if (!c->superspeed)
+ continue;
+ } else if (hs) {
if (!c->highspeed)
continue;
} else {
@@ -423,6 +559,55 @@ static int count_configs(struct usb_composite_dev *cdev, unsigned type)
return count;
}
+/**
+ * bos() - prepares the BOS (Binary Device Object) descriptor
+ * and its device capabilities descriptors. The bos descriptor
+ * should be supported by a Superspeed device.
+ */
+static int bos(struct usb_composite_dev *cdev)
+{
+ struct usb_bos_descriptor *bos = cdev->req->buf;
+ struct usb_ext_cap_descriptor *usb_ext = NULL;
+ struct ss_usb_cap_descriptor *ss_cap = NULL;
+
+ bos->bLength = USB_DT_BOS_SIZE;
+ bos->bDescriptorType = USB_DT_BOS;
+
+ bos->wTotalLength = USB_DT_BOS_SIZE;
+ bos->bNumDeviceCaps = 0;
+
+ /* A SuperSpeed device shall include the USB2.0 extension descriptor and
+ shall support LPM when operating in USB2.0 HS mode.*/
+ usb_ext = (struct usb_ext_cap_descriptor *)
+ (cdev->req->buf+bos->wTotalLength);
+ bos->bNumDeviceCaps++;
+ bos->wTotalLength += USB_DT_USB_EXT_CAP_SIZE;
+ usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE;
+ usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
+ usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT;
+ usb_ext->bmAttributes = USB_LPM_SUPPORT;
+
+ /* The Superspeed USB Capability descriptor shall be implemented by all
+ Superspeed devices. */
+ ss_cap = (struct ss_usb_cap_descriptor *)
+ (cdev->req->buf+bos->wTotalLength);
+ bos->bNumDeviceCaps++;
+ bos->wTotalLength += USB_DT_SS_USB_CAP_SIZE;
+ ss_cap->bLength = USB_DT_SS_USB_CAP_SIZE;
+ ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY;
+ ss_cap->bDevCapabilityType = SS_USB_CAP_TYPE;
+ ss_cap->bmAttributes = 0; /*LTM is not supported yet*/
+ ss_cap->wSpeedSupported = USB_LOW_SPEED_OPERATION |
+ USB_FULL_SPEED_OPERATION |
+ USB_HIGH_SPEED_OPERATION |
+ USB_5GBPS_OPERATION;
+ ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION;
+ ss_cap->bU1devExitLat = 0;
+ ss_cap->bU2DevExitLat = 0;
+
+ return bos->wTotalLength;
+}
+
static void device_qual(struct usb_composite_dev *cdev)
{
struct usb_qualifier_descriptor *qual = cdev->req->buf;
@@ -466,27 +651,40 @@ static int set_config(struct usb_composite_dev *cdev,
unsigned power = gadget_is_otg(gadget) ? 8 : 100;
int tmp;
- if (cdev->config)
- reset_config(cdev);
-
if (number) {
list_for_each_entry(c, &cdev->configs, list) {
if (c->bConfigurationValue == number) {
+ /* Need to disable the FDs of the previous
+ configuration */
+ if (cdev->config)
+ reset_config(cdev);
result = 0;
break;
}
}
if (result < 0)
goto done;
- } else
+ } else { /* Zero configuration value - need to reset the config */
+ if (cdev->config)
+ reset_config(cdev);
result = 0;
+ }
INFO(cdev, "%s speed config #%d: %s\n",
({ char *speed;
switch (gadget->speed) {
- case USB_SPEED_LOW: speed = "low"; break;
- case USB_SPEED_FULL: speed = "full"; break;
- case USB_SPEED_HIGH: speed = "high"; break;
+ case USB_SPEED_LOW:
+ speed = "low";
+ break;
+ case USB_SPEED_FULL:
+ speed = "full";
+ break;
+ case USB_SPEED_HIGH:
+ speed = "high";
+ break;
+ case USB_SPEED_SUPER:
+ speed = "super";
+ break;
default: speed = "?"; break;
} ; speed; }), number, c ? c->label : "unconfigured");
@@ -509,7 +707,9 @@ static int set_config(struct usb_composite_dev *cdev,
* function's setup callback instead of the current
* configuration's setup callback.
*/
- if (gadget->speed == USB_SPEED_HIGH)
+ if (gadget->speed == USB_SPEED_SUPER)
+ descriptors = f->ss_descriptors;
+ else if (gadget->speed == USB_SPEED_HIGH)
descriptors = f->hs_descriptors;
else
descriptors = f->descriptors;
@@ -592,14 +792,14 @@ int usb_add_config(struct usb_composite_dev *cdev,
} else {
unsigned i;
- DBG(cdev, "cfg %d/%p speeds:%s%s\n",
+ DBG(cdev, "cfg %d/%p speeds:%s%s%s\n",
config->bConfigurationValue, config,
+ config->superspeed ? " super" : "",
config->highspeed ? " high" : "",
config->fullspeed
? (gadget_is_dualspeed(cdev->gadget)
? " full"
- : " full/low")
- : "");
+ : " full/low") : "");
for (i = 0; i < MAX_CONFIG_INTERFACES; i++) {
struct usb_function *f = config->interface[i];
@@ -851,6 +1051,7 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
struct usb_composite_dev *cdev = get_gadget_data(gadget);
struct usb_request *req = cdev->req;
int value = -EOPNOTSUPP;
+ int status = 0;
u16 w_index = le16_to_cpu(ctrl->wIndex);
u8 intf = w_index & 0xFF;
u16 w_value = le16_to_cpu(ctrl->wValue);
@@ -878,18 +1079,30 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
case USB_DT_DEVICE:
cdev->desc.bNumConfigurations =
count_configs(cdev, USB_DT_DEVICE);
+ cdev->desc.bMaxPacketSize0 =
+ cdev->gadget->ep0->maxpacket;
+ if (gadget->speed >= USB_SPEED_SUPER)
+ cdev->desc.bcdUSB = cpu_to_le16(0x0300);
+ else if ((gadget_is_superspeed(gadget)) &&
+ (gadget->speed <= USB_SPEED_HIGH))
+ cdev->desc.bcdUSB = cpu_to_le16(0x0210);
+
value = min(w_length, (u16) sizeof cdev->desc);
memcpy(req->buf, &cdev->desc, value);
break;
+
case USB_DT_DEVICE_QUALIFIER:
- if (!gadget_is_dualspeed(gadget))
+ if (!gadget_is_dualspeed(gadget) ||
+ gadget->speed >= USB_SPEED_SUPER)
break;
+
device_qual(cdev);
value = min_t(int, w_length,
sizeof(struct usb_qualifier_descriptor));
break;
case USB_DT_OTHER_SPEED_CONFIG:
- if (!gadget_is_dualspeed(gadget))
+ if (!gadget_is_dualspeed(gadget) ||
+ gadget->speed >= USB_SPEED_SUPER)
break;
/* FALLTHROUGH */
case USB_DT_CONFIG:
@@ -903,6 +1116,12 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
if (value >= 0)
value = min(w_length, (u16) value);
break;
+ case USB_DT_BOS:
+ if (gadget_is_superspeed(gadget)) {
+ value = bos(cdev);
+ value = min(w_length, (u16) value);
+ }
+ break;
}
break;
@@ -962,6 +1181,55 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
*((u8 *)req->buf) = value;
value = min(w_length, (u16) 1);
break;
+
+ /*USB 3.0 additions*/
+ /* Function driver should handle get_status request. If such cb
+ wasn't supplied we respond with default value = 0
+ Note: FD should supply such cb only for the first interface
+ of the function*/
+ case USB_REQ_GET_STATUS:
+ if (!gadget_is_superspeed(gadget))
+ goto unknown;
+ if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE))
+ goto unknown;
+ value = 2; /*This is the length of the get_status reply*/
+ *((u16 *)req->buf) = 0;
+ if (!cdev->config || w_index >= MAX_CONFIG_INTERFACES)
+ break;
+ f = cdev->config->interface[intf];
+ if (!f)
+ break;
+ status = f->get_status ? f->get_status(f) : 0;
+ if (status < 0)
+ break;
+ *((u16 *)req->buf) = status & 0x0000ffff;
+ break;
+ /*Function drivers should handle SetFeature(FUNCTION_SUSPEND) request.
+ function_suspend cb should be supplied only for the first interface
+ of the function*/
+ case USB_REQ_SET_FEATURE:
+ if (!gadget_is_superspeed(gadget))
+ goto unknown;
+ if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE))
+ goto unknown;
+ switch (w_value) {
+ case USB_INTRF_FUNC_SUSPEND:
+ if (!cdev->config || w_index >= MAX_CONFIG_INTERFACES)
+ break;
+ f = cdev->config->interface[intf];
+ if (!f)
+ break;
+ value = f->func_suspend ? f->func_suspend(f) : 0;
+ if (value < 0) {
+ ERROR(cdev, "func_suspend() returned "
+ "error %d\n", value);
+ value = 0;
+ }
+ break;
+ default:
+ break;
+ }
+ break;
default:
unknown:
VDBG(cdev,
@@ -1080,8 +1348,11 @@ composite_unbind(struct usb_gadget *gadget)
DBG(cdev, "unbind function '%s'/%p\n",
f->name, f);
f->unbind(c, f);
- /* may free memory for "f" */
}
+ /*Free memory allocated for ss descriptors*/
+ if (f->ss_desc_allocated && f->ss_descriptors)
+ usb_free_descriptors(f->ss_descriptors);
+ /* may free memory for "f" */
}
list_del(&c->list);
if (c->unbind) {
@@ -1254,7 +1525,6 @@ composite_resume(struct usb_gadget *gadget)
static struct usb_gadget_driver composite_driver = {
.speed = USB_SPEED_HIGH,
-
.bind = composite_bind,
.unbind = composite_unbind,
@@ -1293,6 +1563,9 @@ int usb_composite_register(struct usb_composite_driver *driver)
driver->name = "composite";
composite_driver.function = (char *) driver->name;
composite_driver.driver.name = driver->name;
+#ifdef CONFIG_USB_GADGET_SUPERSPEED
+ composite_driver.speed = USB_SPEED_SUPER;
+#endif /*CONFIG_USB_GADGET_SUPERSPEED*/
composite = driver;
return usb_gadget_register_driver(&composite_driver);
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index da2ed77..69e528a 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -125,6 +125,20 @@
#define USB_ENDPOINT_HALT 0 /* IN/OUT will STALL */
+/**
+ * New Feature Selectors as added by USB 3.0
+ * See USB 3.0 spec Table 9-6
+ */
+#define USB_DEVICE_U1_ENABLE 48 /*enables the upstream port to
+ initiate requests for transition
+ into U1 state*/
+#define USB_DEVICE_U2_ENABLE 49 /*enables the upstream port to
+ initiate requests for transition
+ into U2 state*/
+#define USB_DEVICE_LTM_ENABLE 50 /*enables the devise to send
+ Latency tolerance messages.*/
+#define USB_INTRF_FUNC_SUSPEND 0 /*function suspend*/
+
/**
* struct usb_ctrlrequest - SETUP data for a USB device control request
@@ -675,6 +689,7 @@ struct usb_bos_descriptor {
__u8 bNumDeviceCaps;
} __attribute__((packed));
+#define USB_DT_BOS_SIZE 5
/*-------------------------------------------------------------------------*/
/* USB_DT_DEVICE_CAPABILITY: grouped with BOS */
@@ -712,16 +727,51 @@ struct usb_wireless_cap_descriptor { /* Ultra Wide Band */
__u8 bReserved;
} __attribute__((packed));
+/*USB 2.0 Extension descriptor*/
#define USB_CAP_TYPE_EXT 2
-
struct usb_ext_cap_descriptor { /* Link Power Management */
__u8 bLength;
__u8 bDescriptorType;
__u8 bDevCapabilityType;
- __u8 bmAttributes;
+ __u32 bmAttributes;
#define USB_LPM_SUPPORT (1 << 1) /* supports LPM */
} __attribute__((packed));
+#define USB_DT_USB_EXT_CAP_SIZE 7
+
+/*SuperSpeed USB Capability descriptor: Defines the set of SuperSpeed USB
+ specific device level capabilities*/
+#define SS_USB_CAP_TYPE 3
+struct ss_usb_cap_descriptor { /* Link Power Management */
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDevCapabilityType;
+ __u8 bmAttributes;
+#define USB_LTM_SUPPORT (1 << 1) /* supports LTM */
+ __u16 wSpeedSupported;
+#define USB_LOW_SPEED_OPERATION (1) /* Low speed operation */
+#define USB_FULL_SPEED_OPERATION (1 << 1) /* Full speed operation */
+#define USB_HIGH_SPEED_OPERATION (1 << 2) /* High speed operation */
+#define USB_5GBPS_OPERATION (1 << 3) /* Operation at 5Gbps */
+ __u8 bFunctionalitySupport;
+ __u8 bU1devExitLat;
+ __u16 bU2DevExitLat;
+} __attribute__((packed));
+
+#define USB_DT_SS_USB_CAP_SIZE 10
+
+/*Container ID Capability descriptor: Defines the instance unique ID used to
+ identify the instance across all operating modes*/
+#define CONTAINER_ID_TYPE 4
+struct ss_usb_container_id_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDevCapabilityType;
+ __u8 bReserved;
+ __u8 ContainerID[16]; /*128-bit number*/
+} __attribute__((packed));
+
+#define USB_DT_SS_CONTN_ID_SIZE 20
/*-------------------------------------------------------------------------*/
/* USB_DT_WIRELESS_ENDPOINT_COMP: companion descriptor associated with
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index c623bed..36ab1d0 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -52,6 +52,18 @@ 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. If
+ * wasnt supplied by the FD during @bind() and
+ * !ss_not_capble, will be generated automaticly with
+ * default values while working in superspeed mode. If this
+ * pointer is null after initiation, the function will not
+ * be available at super speed.
+ * @ss_not_capable: This flag is used by the FD to indicate if
+ * this function is SS capble. Meaning: if SS descriptors
+ * weren't supplied by the FD, and the flag is set ss
+ * descriptors will NOT be automatically generated
+ * @ss_desc_allocated: This flag indicates whether the ss descriptors were
+ * dynamically allocated (and needs to be released).
* @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
@@ -70,6 +82,10 @@ 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
@@ -99,6 +115,10 @@ 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;
+
+ unsigned ss_desc_allocated:1;
+ unsigned ss_not_capable:1;
struct usb_configuration *config;
@@ -125,6 +145,9 @@ 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 *);
/* private: */
/* internals */
struct list_head list;
@@ -229,6 +252,7 @@ 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];
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index bf7dc0b..40329b0 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -139,6 +139,8 @@ struct usb_ep_ops {
* @desc:endpoint descriptor. this pointer set before endpoint is enabled and
* remains valid until the endpoint is disabled; the data byte order
* is little-endian (usb-standard).
+ * @comp_desc: In case of SuperSpeed support, this is the
+ * endpoint companion descriptor that is used to configure the endpoint
*
* the bus controller driver lists all the general purpose endpoints in
* gadget->ep_list. the control endpoint (gadget->ep0) is not in that list,
@@ -153,6 +155,7 @@ struct usb_ep {
unsigned maxpacket:16;
u8 bEndpointAddress;
struct usb_endpoint_descriptor *desc;
+ struct usb_ss_ep_comp_descriptor *comp_desc;
};
/*-------------------------------------------------------------------------*/
@@ -525,6 +528,22 @@ static inline int gadget_is_dualspeed(struct usb_gadget *g)
}
/**
+ * gadget_is_superspeed - return true if the hardware handles
+ * supperspeed
+ */
+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
*
--
1.6.3.3
--
Sent by an consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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