Our usbgadget stack is quite outdated. Sync core.c with Linux-6.3-rc2.
Signed-off-by: Sascha Hauer <[email protected]>
---
drivers/usb/dwc2/gadget.c | 3 +-
drivers/usb/dwc3/gadget.c | 3 +-
drivers/usb/gadget/composite.c | 24 +-
drivers/usb/gadget/udc/at91_udc.c | 5 +-
drivers/usb/gadget/udc/core.c | 1492 ++++++++++++++++++++++++---
drivers/usb/gadget/udc/fsl_udc.c | 2 +-
drivers/usb/gadget/udc/pxa27x_udc.c | 22 +-
drivers/usb/gadget/usbstring.c | 2 +-
drivers/usb/musb/musb_gadget.c | 41 +-
include/linux/usb/gadget.h | 827 +++++++--------
10 files changed, 1737 insertions(+), 684 deletions(-)
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index 55d18637c7..028f3c877a 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -2533,8 +2533,7 @@ static int dwc2_gadget_udc_start(struct usb_gadget
*gadget,
return 0;
}
-static int dwc2_gadget_udc_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
+static int dwc2_gadget_udc_stop(struct usb_gadget *gadget)
{
struct dwc2 *dwc2 = to_dwc2(gadget);
unsigned long flags = 0;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0203b7bfc1..b11fccfbfc 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1916,8 +1916,7 @@ err1:
return ret;
}
-static int dwc3_gadget_stop(struct usb_gadget *g,
- struct usb_gadget_driver *driver)
+static int dwc3_gadget_stop(struct usb_gadget *g)
{
struct dwc3 *dwc = gadget_to_dwc(g);
unsigned long flags;
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 88ae191ce0..af3dee48f4 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -540,7 +540,7 @@ static int bos_desc(struct usb_composite_dev *cdev)
/* Get Controller configuration */
if (cdev->gadget->ops->get_config_params)
- cdev->gadget->ops->get_config_params(&dcd_config_params);
+ cdev->gadget->ops->get_config_params(cdev->gadget,
&dcd_config_params);
else {
dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT;
dcd_config_params.bU2DevExitLat =
@@ -1518,7 +1518,7 @@ done:
return value;
}
-void composite_disconnect(struct usb_gadget *gadget)
+static void __composite_disconnect(struct usb_gadget *gadget)
{
struct usb_composite_dev *cdev = get_gadget_data(gadget);
@@ -1531,6 +1531,23 @@ void composite_disconnect(struct usb_gadget *gadget)
cdev->driver->disconnect(cdev);
}
+void composite_disconnect(struct usb_gadget *gadget)
+{
+ usb_gadget_vbus_draw(gadget, 0);
+ __composite_disconnect(gadget);
+}
+
+static void composite_reset(struct usb_gadget *gadget)
+{
+ /*
+ * Section 1.4.13 Standard Downstream Port of the USB battery charging
+ * specification v1.2 states that a device connected on a SDP shall only
+ * draw at max 100mA while in a connected, but unconfigured state.
+ */
+ usb_gadget_vbus_draw(gadget, 100);
+ __composite_disconnect(gadget);
+}
+
/*-------------------------------------------------------------------------*/
static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver)
@@ -1710,6 +1727,7 @@ static const struct usb_gadget_driver
composite_driver_template = {
.unbind = composite_unbind,
.setup = composite_setup,
+ .reset = composite_reset,
.disconnect = composite_disconnect,
};
@@ -1746,7 +1764,7 @@ int usb_composite_probe(struct usb_composite_driver
*driver)
gadget_driver->driver.name = driver->name;
gadget_driver->max_speed = driver->max_speed;
- return usb_gadget_probe_driver(gadget_driver);
+ return usb_gadget_register_driver(gadget_driver);
}
EXPORT_SYMBOL_GPL(usb_composite_probe);
diff --git a/drivers/usb/gadget/udc/at91_udc.c
b/drivers/usb/gadget/udc/at91_udc.c
index 2a3d5765de..654362d69e 100644
--- a/drivers/usb/gadget/udc/at91_udc.c
+++ b/drivers/usb/gadget/udc/at91_udc.c
@@ -1240,7 +1240,7 @@ static int at91_udc_start(struct usb_gadget *gadget,
struct usb_gadget_driver *d
return 0;
}
-static int at91_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver
*driver)
+static int at91_udc_stop(struct usb_gadget *gadget)
{
struct at91_udc *udc = container_of(gadget, struct at91_udc, gadget);
@@ -1248,7 +1248,8 @@ static int at91_udc_stop(struct usb_gadget *gadget,
struct usb_gadget_driver *dr
at91_udp_write(udc, AT91_UDP_IDR, ~0);
udc->driver = NULL;
- DBG(udc, "unbound from %s\n", driver->function);
+ DBG(udc, "unbound\n");
+
return 0;
}
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
index ec3ae603e1..d4257de282 100644
--- a/drivers/usb/gadget/udc/core.c
+++ b/drivers/usb/gadget/udc/core.c
@@ -1,37 +1,954 @@
-// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * udc.c - Core UDC Framework
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Felipe Balbi <[email protected]>
+ */
+
+#define pr_fmt(fmt) "UDC core: " fmt
+
+#include <common.h>
+#include <dma.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/ch9.h>
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/idr.h>
+#include <linux/err.h>
+
+static int gadget_id_numbers;
+
+static struct bus_type gadget_bus_type;
+
+/**
+ * struct usb_udc - describes one usb device controller
+ * @driver: the gadget driver pointer. For use by the class code
+ * @dev: the child device to the actual controller
+ * @gadget: the gadget. For use by the class code
+ * @list: for use by the udc class driver
+ * @vbus: for udcs who care about vbus status, this value is real vbus status;
+ * for udcs who do not care about vbus status, this value is always true
+ * @started: the UDC's started state. True if the UDC had started.
+ *
+ * This represents the internal data structure which is used by the UDC-class
+ * to hold information about udc driver and gadget together.
+ */
+struct usb_udc {
+ struct usb_gadget_driver *driver;
+ struct usb_gadget *gadget;
+ struct device dev;
+ struct list_head list;
+ bool vbus;
+ bool started;
+ struct poller_struct poller;
+};
+
+static LIST_HEAD(udc_list);
+
+/* Protects udc_list, udc->driver, driver->is_bound, and related calls */
+static DEFINE_MUTEX(udc_lock);
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ * usb_ep_set_maxpacket_limit - set maximum packet size limit for endpoint
+ * @ep:the endpoint being configured
+ * @maxpacket_limit:value of maximum packet size limit
+ *
+ * This function should be used only in UDC drivers to initialize endpoint
+ * (usually in probe function).
+ */
+void usb_ep_set_maxpacket_limit(struct usb_ep *ep,
+ unsigned maxpacket_limit)
+{
+ ep->maxpacket_limit = maxpacket_limit;
+ ep->maxpacket = maxpacket_limit;
+}
+EXPORT_SYMBOL_GPL(usb_ep_set_maxpacket_limit);
+
+/**
+ * usb_ep_enable - configure endpoint, making it usable
+ * @ep:the endpoint being configured. may not be the endpoint named "ep0".
+ * drivers discover endpoints through the ep_list of a usb_gadget.
+ *
+ * When configurations are set, or when interface settings change, the driver
+ * will enable or disable the relevant endpoints. while it is enabled, an
+ * endpoint may be used for i/o until the driver receives a disconnect() from
+ * the host or until the endpoint is disabled.
+ *
+ * the ep0 implementation (which calls this routine) must ensure that the
+ * hardware capabilities of each endpoint match the descriptor provided
+ * for it. for example, an endpoint named "ep2in-bulk" would be usable
+ * for interrupt transfers as well as bulk, but it likely couldn't be used
+ * for iso transfers or for endpoint 14. some endpoints are fully
+ * configurable, with more generic names like "ep-a". (remember that for
+ * USB, "in" means "towards the USB host".)
+ *
+ * This routine may be called in an atomic (interrupt) context.
+ *
+ * returns zero, or a negative error code.
+ */
+int usb_ep_enable(struct usb_ep *ep)
+{
+ int ret = 0;
+
+ if (ep->enabled)
+ goto out;
+
+ /* UDC drivers can't handle endpoints with maxpacket size 0 */
+ if (usb_endpoint_maxp(ep->desc) == 0) {
+ /*
+ * We should log an error message here, but we can't call
+ * dev_err() because there's no way to find the gadget
+ * given only ep.
+ */
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = ep->ops->enable(ep, ep->desc);
+ if (ret)
+ goto out;
+
+ ep->enabled = true;
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_enable);
+
+/**
+ * usb_ep_disable - endpoint is no longer usable
+ * @ep:the endpoint being unconfigured. may not be the endpoint named "ep0".
+ *
+ * no other task may be using this endpoint when this is called.
+ * any pending and uncompleted requests will complete with status
+ * indicating disconnect (-ESHUTDOWN) before this call returns.
+ * gadget drivers must call usb_ep_enable() again before queueing
+ * requests to the endpoint.
+ *
+ * This routine may be called in an atomic (interrupt) context.
+ *
+ * returns zero, or a negative error code.
+ */
+int usb_ep_disable(struct usb_ep *ep)
+{
+ int ret = 0;
+
+ if (!ep->enabled)
+ goto out;
+
+ ret = ep->ops->disable(ep);
+ if (ret)
+ goto out;
+
+ ep->enabled = false;
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_disable);
+
+/**
+ * usb_ep_alloc_request - allocate a request object to use with this endpoint
+ * @ep:the endpoint to be used with with the request
+ * @gfp_flags:GFP_* flags to use
+ *
+ * Request objects must be allocated with this call, since they normally
+ * need controller-specific setup and may even need endpoint-specific
+ * resources such as allocation of DMA descriptors.
+ * Requests may be submitted with usb_ep_queue(), and receive a single
+ * completion callback. Free requests with usb_ep_free_request(), when
+ * they are no longer needed.
+ *
+ * Returns the request, or null if one could not be allocated.
+ */
+struct usb_request *usb_ep_alloc_request(struct usb_ep *ep)
+{
+ struct usb_request *req = NULL;
+
+ req = ep->ops->alloc_request(ep);
+
+ return req;
+}
+EXPORT_SYMBOL_GPL(usb_ep_alloc_request);
+
+/**
+ * usb_ep_free_request - frees a request object
+ * @ep:the endpoint associated with the request
+ * @req:the request being freed
+ *
+ * Reverses the effect of usb_ep_alloc_request().
+ * Caller guarantees the request is not queued, and that it will
+ * no longer be requeued (or otherwise used).
+ */
+void usb_ep_free_request(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ ep->ops->free_request(ep, req);
+}
+EXPORT_SYMBOL_GPL(usb_ep_free_request);
+
+/**
+ * usb_ep_queue - queues (submits) an I/O request to an endpoint.
+ * @ep:the endpoint associated with the request
+ * @req:the request being submitted
+ * @gfp_flags: GFP_* flags to use in case the lower level driver couldn't
+ * pre-allocate all necessary memory with the request.
+ *
+ * This tells the device controller to perform the specified request through
+ * that endpoint (reading or writing a buffer). When the request completes,
+ * including being canceled by usb_ep_dequeue(), the request's completion
+ * routine is called to return the request to the driver. Any endpoint
+ * (except control endpoints like ep0) may have more than one transfer
+ * request queued; they complete in FIFO order. Once a gadget driver
+ * submits a request, that request may not be examined or modified until it
+ * is given back to that driver through the completion callback.
+ *
+ * Each request is turned into one or more packets. The controller driver
+ * never merges adjacent requests into the same packet. OUT transfers
+ * will sometimes use data that's already buffered in the hardware.
+ * Drivers can rely on the fact that the first byte of the request's buffer
+ * always corresponds to the first byte of some USB packet, for both
+ * IN and OUT transfers.
+ *
+ * Bulk endpoints can queue any amount of data; the transfer is packetized
+ * automatically. The last packet will be short if the request doesn't fill it
+ * out completely. Zero length packets (ZLPs) should be avoided in portable
+ * protocols since not all usb hardware can successfully handle zero length
+ * packets. (ZLPs may be explicitly written, and may be implicitly written if
+ * the request 'zero' flag is set.) Bulk endpoints may also be used
+ * for interrupt transfers; but the reverse is not true, and some endpoints
+ * won't support every interrupt transfer. (Such as 768 byte packets.)
+ *
+ * Interrupt-only endpoints are less functional than bulk endpoints, for
+ * example by not supporting queueing or not handling buffers that are
+ * larger than the endpoint's maxpacket size. They may also treat data
+ * toggle differently.
+ *
+ * Control endpoints ... after getting a setup() callback, the driver queues
+ * one response (even if it would be zero length). That enables the
+ * status ack, after transferring data as specified in the response. Setup
+ * functions may return negative error codes to generate protocol stalls.
+ * (Note that some USB device controllers disallow protocol stall responses
+ * in some cases.) When control responses are deferred (the response is
+ * written after the setup callback returns), then usb_ep_set_halt() may be
+ * used on ep0 to trigger protocol stalls. Depending on the controller,
+ * it may not be possible to trigger a status-stage protocol stall when the
+ * data stage is over, that is, from within the response's completion
+ * routine.
+ *
+ * For periodic endpoints, like interrupt or isochronous ones, the usb host
+ * arranges to poll once per interval, and the gadget driver usually will
+ * have queued some data to transfer at that time.
+ *
+ * Note that @req's ->complete() callback must never be called from
+ * within usb_ep_queue() as that can create deadlock situations.
+ *
+ * This routine may be called in interrupt context.
+ *
+ * Returns zero, or a negative error code. Endpoints that are not enabled
+ * report errors; errors will also be
+ * reported when the usb peripheral is disconnected.
+ *
+ * If and only if @req is successfully queued (the return value is zero),
+ * @req->complete() will be called exactly once, when the Gadget core and
+ * UDC are finished with the request. When the completion function is called,
+ * control of the request is returned to the device driver which submitted it.
+ * The completion handler may then immediately free or reuse @req.
+ */
+int usb_ep_queue(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ int ret = 0;
+
+ if (WARN_ON_ONCE(!ep->enabled && ep->address)) {
+ ret = -ESHUTDOWN;
+ goto out;
+ }
+
+ ret = ep->ops->queue(ep, req);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_queue);
+
+/**
+ * usb_ep_dequeue - dequeues (cancels, unlinks) an I/O request from an endpoint
+ * @ep:the endpoint associated with the request
+ * @req:the request being canceled
+ *
+ * If the request is still active on the endpoint, it is dequeued and
+ * eventually its completion routine is called (with status -ECONNRESET);
+ * else a negative error code is returned. This routine is asynchronous,
+ * that is, it may return before the completion routine runs.
+ *
+ * Note that some hardware can't clear out write fifos (to unlink the request
+ * at the head of the queue) except as part of disconnecting from usb. Such
+ * restrictions prevent drivers from supporting configuration changes,
+ * even to configuration zero (a "chapter 9" requirement).
+ *
+ * This routine may be called in interrupt context.
+ */
+int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
+{
+ int ret;
+
+ ret = ep->ops->dequeue(ep, req);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_dequeue);
+
+/**
+ * usb_ep_set_halt - sets the endpoint halt feature.
+ * @ep: the non-isochronous endpoint being stalled
+ *
+ * Use this to stall an endpoint, perhaps as an error report.
+ * Except for control endpoints,
+ * the endpoint stays halted (will not stream any data) until the host
+ * clears this feature; drivers may need to empty the endpoint's request
+ * queue first, to make sure no inappropriate transfers happen.
+ *
+ * Note that while an endpoint CLEAR_FEATURE will be invisible to the
+ * gadget driver, a SET_INTERFACE will not be. To reset endpoints for the
+ * current altsetting, see usb_ep_clear_halt(). When switching altsettings,
+ * it's simplest to use usb_ep_enable() or usb_ep_disable() for the endpoints.
+ *
+ * This routine may be called in interrupt context.
+ *
+ * Returns zero, or a negative error code. On success, this call sets
+ * underlying hardware state that blocks data transfers.
+ * Attempts to halt IN endpoints will fail (returning -EAGAIN) if any
+ * transfer requests are still queued, or if the controller hardware
+ * (usually a FIFO) still holds bytes that the host hasn't collected.
+ */
+int usb_ep_set_halt(struct usb_ep *ep)
+{
+ int ret;
+
+ ret = ep->ops->set_halt(ep, 1);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_set_halt);
+
+/**
+ * usb_ep_clear_halt - clears endpoint halt, and resets toggle
+ * @ep:the bulk or interrupt endpoint being reset
+ *
+ * Use this when responding to the standard usb "set interface" request,
+ * for endpoints that aren't reconfigured, after clearing any other state
+ * in the endpoint's i/o queue.
+ *
+ * This routine may be called in interrupt context.
+ *
+ * Returns zero, or a negative error code. On success, this call clears
+ * the underlying hardware state reflecting endpoint halt and data toggle.
+ * Note that some hardware can't support this request (like pxa2xx_udc),
+ * and accordingly can't correctly implement interface altsettings.
+ */
+int usb_ep_clear_halt(struct usb_ep *ep)
+{
+ int ret;
+
+ ret = ep->ops->set_halt(ep, 0);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_clear_halt);
+
+/**
+ * usb_ep_set_wedge - sets the halt feature and ignores clear requests
+ * @ep: the endpoint being wedged
+ *
+ * Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)
+ * requests. If the gadget driver clears the halt status, it will
+ * automatically unwedge the endpoint.
+ *
+ * This routine may be called in interrupt context.
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_ep_set_wedge(struct usb_ep *ep)
+{
+ int ret;
+
+ if (ep->ops->set_wedge)
+ ret = ep->ops->set_wedge(ep);
+ else
+ ret = ep->ops->set_halt(ep, 1);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_set_wedge);
+
+/**
+ * usb_ep_fifo_status - returns number of bytes in fifo, or error
+ * @ep: the endpoint whose fifo status is being checked.
+ *
+ * FIFO endpoints may have "unclaimed data" in them in certain cases,
+ * such as after aborted transfers. Hosts may not have collected all
+ * the IN data written by the gadget driver (and reported by a request
+ * completion). The gadget driver may not have collected all the data
+ * written OUT to it by the host. Drivers that need precise handling for
+ * fault reporting or recovery may need to use this call.
+ *
+ * This routine may be called in interrupt context.
+ *
+ * This returns the number of such bytes in the fifo, or a negative
+ * errno if the endpoint doesn't use a FIFO or doesn't support such
+ * precise handling.
+ */
+int usb_ep_fifo_status(struct usb_ep *ep)
+{
+ int ret;
+
+ if (ep->ops->fifo_status)
+ ret = ep->ops->fifo_status(ep);
+ else
+ ret = -EOPNOTSUPP;
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_ep_fifo_status);
+
+/**
+ * usb_ep_fifo_flush - flushes contents of a fifo
+ * @ep: the endpoint whose fifo is being flushed.
+ *
+ * This call may be used to flush the "unclaimed data" that may exist in
+ * an endpoint fifo after abnormal transaction terminations. The call
+ * must never be used except when endpoint is not being used for any
+ * protocol translation.
+ *
+ * This routine may be called in interrupt context.
+ */
+void usb_ep_fifo_flush(struct usb_ep *ep)
+{
+ if (ep->ops->fifo_flush)
+ ep->ops->fifo_flush(ep);
+}
+EXPORT_SYMBOL_GPL(usb_ep_fifo_flush);
+
+/* ------------------------------------------------------------------------- */
+
+/**
+ * usb_gadget_frame_number - returns the current frame number
+ * @gadget: controller that reports the frame number
+ *
+ * Returns the usb frame number, normally eleven bits from a SOF packet,
+ * or negative errno if this device doesn't support this capability.
+ */
+int usb_gadget_frame_number(struct usb_gadget *gadget)
+{
+ int ret;
+
+ ret = gadget->ops->get_frame(gadget);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_frame_number);
+
+/**
+ * usb_gadget_wakeup - tries to wake up the host connected to this gadget
+ * @gadget: controller used to wake up the host
+ *
+ * Returns zero on success, else negative error code if the hardware
+ * doesn't support such attempts, or its support has not been enabled
+ * by the usb host. Drivers must return device descriptors that report
+ * their ability to support this, or hosts won't enable it.
+ *
+ * This may also try to use SRP to wake the host and start enumeration,
+ * even if OTG isn't otherwise in use. OTG devices may also start
+ * remote wakeup even when hosts don't explicitly enable it.
+ */
+int usb_gadget_wakeup(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->wakeup) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = gadget->ops->wakeup(gadget);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_wakeup);
+
+/**
+ * usb_gadget_set_selfpowered - sets the device selfpowered feature.
+ * @gadget:the device being declared as self-powered
+ *
+ * this affects the device status reported by the hardware driver
+ * to reflect that it now has a local power supply.
+ *
+ * returns zero on success, else negative errno.
+ */
+int usb_gadget_set_selfpowered(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->set_selfpowered) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = gadget->ops->set_selfpowered(gadget, 1);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_set_selfpowered);
+
+/**
+ * usb_gadget_clear_selfpowered - clear the device selfpowered feature.
+ * @gadget:the device being declared as bus-powered
+ *
+ * this affects the device status reported by the hardware driver.
+ * some hardware may not support bus-powered operation, in which
+ * case this feature's value can never change.
+ *
+ * returns zero on success, else negative errno.
+ */
+int usb_gadget_clear_selfpowered(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->set_selfpowered) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = gadget->ops->set_selfpowered(gadget, 0);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_clear_selfpowered);
+
+/**
+ * usb_gadget_vbus_connect - Notify controller that VBUS is powered
+ * @gadget:The device which now has VBUS power.
+ * Context: can sleep
+ *
+ * This call is used by a driver for an external transceiver (or GPIO)
+ * that detects a VBUS power session starting. Common responses include
+ * resuming the controller, activating the D+ (or D-) pullup to let the
+ * host detect that a USB device is attached, and starting to draw power
+ * (8mA or possibly more, especially after SET_CONFIGURATION).
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_vbus_connect(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->vbus_session) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = gadget->ops->vbus_session(gadget, 1);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_vbus_connect);
+
+/**
+ * usb_gadget_vbus_draw - constrain controller's VBUS power usage
+ * @gadget:The device whose VBUS usage is being described
+ * @mA:How much current to draw, in milliAmperes. This should be twice
+ * the value listed in the configuration descriptor bMaxPower field.
+ *
+ * This call is used by gadget drivers during SET_CONFIGURATION calls,
+ * reporting how much power the device may consume. For example, this
+ * could affect how quickly batteries are recharged.
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
+{
+ int ret = 0;
+
+ if (!gadget->ops->vbus_draw) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = gadget->ops->vbus_draw(gadget, mA);
+ if (!ret)
+ gadget->mA = mA;
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_vbus_draw);
+
+/**
+ * usb_gadget_vbus_disconnect - notify controller about VBUS session end
+ * @gadget:the device whose VBUS supply is being described
+ * Context: can sleep
+ *
+ * This call is used by a driver for an external transceiver (or GPIO)
+ * that detects a VBUS power session ending. Common responses include
+ * reversing everything done in usb_gadget_vbus_connect().
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_vbus_disconnect(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->vbus_session) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ ret = gadget->ops->vbus_session(gadget, 0);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_vbus_disconnect);
+
+/**
+ * usb_gadget_connect - software-controlled connect to USB host
+ * @gadget:the peripheral being connected
+ *
+ * Enables the D+ (or potentially D-) pullup. The host will start
+ * enumerating this gadget when the pullup is active and a VBUS session
+ * is active (the link is powered).
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_connect(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->pullup) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (gadget->deactivated) {
+ /*
+ * If gadget is deactivated we only save new state.
+ * Gadget will be connected automatically after activation.
+ */
+ gadget->connected = true;
+ goto out;
+ }
+
+ ret = gadget->ops->pullup(gadget, 1);
+ if (!ret)
+ gadget->connected = 1;
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_connect);
+
+/**
+ * usb_gadget_disconnect - software-controlled disconnect from USB host
+ * @gadget:the peripheral being disconnected
+ *
+ * Disables the D+ (or potentially D-) pullup, which the host may see
+ * as a disconnect (when a VBUS session is active). Not all systems
+ * support software pullup controls.
+ *
+ * Following a successful disconnect, invoke the ->disconnect() callback
+ * for the current gadget driver so that UDC drivers don't need to.
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_disconnect(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->ops->pullup) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!gadget->connected)
+ goto out;
+
+ if (gadget->deactivated) {
+ /*
+ * If gadget is deactivated we only save new state.
+ * Gadget will stay disconnected after activation.
+ */
+ gadget->connected = false;
+ goto out;
+ }
+
+ ret = gadget->ops->pullup(gadget, 0);
+ if (!ret)
+ gadget->connected = 0;
+
+ mutex_lock(&udc_lock);
+ if (gadget->udc->driver)
+ gadget->udc->driver->disconnect(gadget);
+ mutex_unlock(&udc_lock);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_disconnect);
+
+/**
+ * usb_gadget_deactivate - deactivate function which is not ready to work
+ * @gadget: the peripheral being deactivated
+ *
+ * This routine may be used during the gadget driver bind() call to prevent
+ * the peripheral from ever being visible to the USB host, unless later
+ * usb_gadget_activate() is called. For example, user mode components may
+ * need to be activated before the system can talk to hosts.
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_deactivate(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (gadget->deactivated)
+ goto out;
+
+ if (gadget->connected) {
+ ret = usb_gadget_disconnect(gadget);
+ if (ret)
+ goto out;
+
+ /*
+ * If gadget was being connected before deactivation, we want
+ * to reconnect it in usb_gadget_activate().
+ */
+ gadget->connected = true;
+ }
+ gadget->deactivated = true;
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_deactivate);
+
+/**
+ * usb_gadget_activate - activate function which is not ready to work
+ * @gadget: the peripheral being activated
+ *
+ * This routine activates gadget which was previously deactivated with
+ * usb_gadget_deactivate() call. It calls usb_gadget_connect() if needed.
+ *
+ * Returns zero on success, else negative errno.
+ */
+int usb_gadget_activate(struct usb_gadget *gadget)
+{
+ int ret = 0;
+
+ if (!gadget->deactivated)
+ goto out;
+
+ gadget->deactivated = false;
+
+ /*
+ * If gadget has been connected before deactivation, or became connected
+ * while it was being deactivated, we call usb_gadget_connect().
+ */
+ if (gadget->connected)
+ ret = usb_gadget_connect(gadget);
+
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_activate);
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_HAS_DMA
+
+int usb_gadget_map_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in)
+{
+ if (req->length == 0)
+ return 0;
+
+ req->dma = dma_map_single(dev, req->buf, req->length,
+ is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+
+ if (dma_mapping_error(dev, req->dma)) {
+ dev_err(dev, "failed to map buffer\n");
+ return -EFAULT;
+ }
+
+ req->dma_mapped = 1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_map_request_by_dev);
+
+int usb_gadget_map_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in)
+{
+ return usb_gadget_map_request_by_dev(gadget->dev.parent, req, is_in);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_map_request);
+
+void usb_gadget_unmap_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in)
+{
+ if (req->length == 0)
+ return;
+
+ if (req->dma_mapped) {
+ dma_unmap_single(dev, req->dma, req->length,
+ is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ req->dma_mapped = 0;
+ }
+}
+EXPORT_SYMBOL_GPL(usb_gadget_unmap_request_by_dev);
+
+void usb_gadget_unmap_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in)
+{
+ usb_gadget_unmap_request_by_dev(gadget->dev.parent, req, is_in);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
+
+#endif /* CONFIG_HAS_DMA */
+
+/* ------------------------------------------------------------------------- */
+
/**
- * udc.c - Core UDC Framework
+ * usb_gadget_giveback_request - give the request back to the gadget layer
+ * @ep: the endpoint to be used with with the request
+ * @req: the request being given back
*
- * Copyright (C) 2010 Texas Instruments
- * Author: Felipe Balbi <[email protected]>
+ * This is called by device controller drivers in order to return the
+ * completed request back to the gadget layer.
*/
-#define VERBOSE_DEBUG
-#include <common.h>
-#include <driver.h>
-#include <init.h>
-#include <poller.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
+void usb_gadget_giveback_request(struct usb_ep *ep,
+ struct usb_request *req)
+{
+ req->complete(ep, req);
+}
+EXPORT_SYMBOL_GPL(usb_gadget_giveback_request);
+
+/* ------------------------------------------------------------------------- */
/**
- * struct usb_udc - describes one usb device controller
- * @driver - the gadget driver pointer. For use by the class code
- * @dev - the child device to the actual controller
- * @gadget - the gadget. For use by the class code
- * @list - for use by the udc class driver
- *
- * This represents the internal data structure which is used by the UDC-class
- * to hold information about udc driver and gadget together.
+ * gadget_find_ep_by_name - returns ep whose name is the same as sting passed
+ * in second parameter or NULL if searched endpoint not found
+ * @g: controller to check for quirk
+ * @name: name of searched endpoint
*/
-struct usb_udc {
- struct usb_gadget_driver *driver;
- struct usb_gadget *gadget;
- struct device dev;
- struct list_head list;
- struct poller_struct poller;
-};
+struct usb_ep *gadget_find_ep_by_name(struct usb_gadget *g, const char *name)
+{
+ struct usb_ep *ep;
-static LIST_HEAD(udc_list);
+ gadget_for_each_ep(ep, g) {
+ if (!strcmp(ep->name, name))
+ return ep;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(gadget_find_ep_by_name);
+
+/* ------------------------------------------------------------------------- */
+
+int usb_gadget_ep_match_desc(struct usb_gadget *gadget,
+ struct usb_ep *ep, struct usb_endpoint_descriptor *desc,
+ struct usb_ss_ep_comp_descriptor *ep_comp)
+{
+ u8 type;
+ u16 max;
+ int num_req_streams = 0;
+
+ /* endpoint already claimed? */
+ if (ep->claimed)
+ return 0;
+
+ type = usb_endpoint_type(desc);
+ max = usb_endpoint_maxp(desc);
+
+ if (usb_endpoint_dir_in(desc) && !ep->caps.dir_in)
+ return 0;
+ if (usb_endpoint_dir_out(desc) && !ep->caps.dir_out)
+ return 0;
+
+ if (max > ep->maxpacket_limit)
+ return 0;
+
+ /* "high bandwidth" works only at high speed */
+ if (!gadget_is_dualspeed(gadget) && usb_endpoint_maxp_mult(desc) > 1)
+ return 0;
+
+ switch (type) {
+ case USB_ENDPOINT_XFER_CONTROL:
+ /* only support ep0 for portable CONTROL traffic */
+ return 0;
+ case USB_ENDPOINT_XFER_ISOC:
+ if (!ep->caps.type_iso)
+ return 0;
+ /* ISO: limit 1023 bytes full speed, 1024 high/super speed */
+ if (!gadget_is_dualspeed(gadget) && max > 1023)
+ return 0;
+ break;
+ case USB_ENDPOINT_XFER_BULK:
+ if (!ep->caps.type_bulk)
+ return 0;
+ if (ep_comp && gadget_is_superspeed(gadget)) {
+ /* Get the number of required streams from the
+ * EP companion descriptor and see if the EP
+ * matches it
+ */
+ num_req_streams = ep_comp->bmAttributes & 0x1f;
+ if (num_req_streams > ep->max_streams)
+ return 0;
+ }
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ /* Bulk endpoints handle interrupt transfers,
+ * except the toggle-quirky iso-synch kind
+ */
+ if (!ep->caps.type_int && !ep->caps.type_bulk)
+ return 0;
+ /* INT: limit 64 bytes full speed, 1024 high/super speed */
+ if (!gadget_is_dualspeed(gadget) && max > 64)
+ return 0;
+ break;
+ }
+
+ return 1;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_ep_match_desc);
+
+/**
+ * usb_gadget_check_config - checks if the UDC can support the binded
+ * configuration
+ * @gadget: controller to check the USB configuration
+ *
+ * Ensure that a UDC is able to support the requested resources by a
+ * configuration, and that there are no resource limitations, such as
+ * internal memory allocated to all requested endpoints.
+ *
+ * Returns zero on success, else a negative errno.
+ */
+int usb_gadget_check_config(struct usb_gadget *gadget)
+{
+ if (gadget->ops->check_config)
+ return gadget->ops->check_config(gadget);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(usb_gadget_check_config);
/* ------------------------------------------------------------------------- */
@@ -42,6 +959,36 @@ void usb_gadget_set_state(struct usb_gadget *gadget,
}
EXPORT_SYMBOL_GPL(usb_gadget_set_state);
+/* ------------------------------------------------------------------------- */
+
+static void usb_udc_connect_control(struct usb_udc *udc)
+{
+ if (udc->vbus)
+ usb_gadget_connect(udc->gadget);
+ else
+ usb_gadget_disconnect(udc->gadget);
+}
+
+/**
+ * usb_udc_vbus_handler - updates the udc core vbus status, and try to
+ * connect or disconnect gadget
+ * @gadget: The gadget which vbus change occurs
+ * @status: The vbus status
+ *
+ * The udc driver calls it when it wants to connect or disconnect gadget
+ * according to vbus status.
+ */
+void usb_udc_vbus_handler(struct usb_gadget *gadget, bool status)
+{
+ struct usb_udc *udc = gadget->udc;
+
+ if (udc) {
+ udc->vbus = status;
+ usb_udc_connect_control(udc);
+ }
+}
+EXPORT_SYMBOL_GPL(usb_udc_vbus_handler);
+
/**
* usb_gadget_udc_reset - notifies the udc core that bus reset occurs
* @gadget: The gadget which bus reset occurs
@@ -54,15 +1001,14 @@ EXPORT_SYMBOL_GPL(usb_gadget_set_state);
void usb_gadget_udc_reset(struct usb_gadget *gadget,
struct usb_gadget_driver *driver)
{
+ driver->reset(gadget);
usb_gadget_set_state(gadget, USB_STATE_DEFAULT);
}
EXPORT_SYMBOL_GPL(usb_gadget_udc_reset);
-/* ------------------------------------------------------------------------- */
/**
* usb_gadget_udc_start - tells usb device controller to start up
- * @gadget: The gadget we want to get started
- * @driver: The driver we want to bind to @gadget
+ * @udc: The UDC to be started
*
* This call is issued by the UDC Class driver when it's about
* to register a gadget driver to the device controller, before
@@ -73,16 +1019,25 @@ EXPORT_SYMBOL_GPL(usb_gadget_udc_reset);
*
* Returns zero on success, else negative errno.
*/
-static inline int usb_gadget_udc_start(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
+static inline int usb_gadget_udc_start(struct usb_udc *udc)
{
- return gadget->ops->udc_start(gadget, driver);
+ int ret;
+
+ if (udc->started) {
+ dev_err(&udc->dev, "UDC had already started\n");
+ return -EBUSY;
+ }
+
+ ret = udc->gadget->ops->udc_start(udc->gadget, udc->driver);
+ if (!ret)
+ udc->started = true;
+
+ return ret;
}
/**
* usb_gadget_udc_stop - tells usb device controller we don't need it anymore
- * @gadget: The device we want to stop activity
- * @driver: The driver to unbind from @gadget
+ * @udc: The UDC to be stopped
*
* This call is issued by the UDC Class driver after calling
* gadget driver's unbind() method.
@@ -91,86 +1046,249 @@ static inline int usb_gadget_udc_start(struct usb_gadget
*gadget,
* far as powering off UDC completely and disable its data
* line pullups.
*/
-static inline void usb_gadget_udc_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
+static inline void usb_gadget_udc_stop(struct usb_udc *udc)
{
- gadget->ops->udc_stop(gadget, driver);
+ if (!udc->started) {
+ dev_err(&udc->dev, "UDC had already stopped\n");
+ return;
+ }
+
+ udc->gadget->ops->udc_stop(udc->gadget);
+ udc->started = false;
}
-int usb_gadget_poll(void)
+/**
+ * usb_gadget_udc_set_speed - tells usb device controller speed supported by
+ * current driver
+ * @udc: The device we want to set maximum speed
+ * @speed: The maximum speed to allowed to run
+ *
+ * This call is issued by the UDC Class driver before calling
+ * usb_gadget_udc_start() in order to make sure that we don't try to
+ * connect on speeds the gadget driver doesn't support.
+ */
+static inline void usb_gadget_udc_set_speed(struct usb_udc *udc,
+ enum usb_device_speed speed)
{
- struct usb_udc *udc;
+ struct usb_gadget *gadget = udc->gadget;
+ enum usb_device_speed s;
- list_for_each_entry(udc, &udc_list, list) {
- if (udc->gadget->ops->udc_poll)
- udc->gadget->ops->udc_poll(udc->gadget);
- }
+ if (speed == USB_SPEED_UNKNOWN)
+ s = gadget->max_speed;
+ else
+ s = min(speed, gadget->max_speed);
- return 0;
+ if (s == USB_SPEED_SUPER_PLUS && gadget->ops->udc_set_ssp_rate)
+ gadget->ops->udc_set_ssp_rate(gadget, gadget->max_ssp_rate);
+ else if (gadget->ops->udc_set_speed)
+ gadget->ops->udc_set_speed(gadget, s);
}
/**
- * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list
+ * usb_gadget_enable_async_callbacks - tell usb device controller to enable
asynchronous callbacks
+ * @udc: The UDC which should enable async callbacks
+ *
+ * This routine is used when binding gadget drivers. It undoes the effect
+ * of usb_gadget_disable_async_callbacks(); the UDC driver should enable IRQs
+ * (if necessary) and resume issuing callbacks.
+ *
+ * This routine will always be called in process context.
+ */
+static inline void usb_gadget_enable_async_callbacks(struct usb_udc *udc)
+{
+ struct usb_gadget *gadget = udc->gadget;
+
+ if (gadget->ops->udc_async_callbacks)
+ gadget->ops->udc_async_callbacks(gadget, true);
+}
+
+/**
+ * usb_gadget_disable_async_callbacks - tell usb device controller to disable
asynchronous callbacks
+ * @udc: The UDC which should disable async callbacks
+ *
+ * This routine is used when unbinding gadget drivers. It prevents a race:
+ * The UDC driver doesn't know when the gadget driver's ->unbind callback
+ * runs, so unless it is told to disable asynchronous callbacks, it might
+ * issue a callback (such as ->disconnect) after the unbind has completed.
+ *
+ * After this function runs, the UDC driver must suppress all ->suspend,
+ * ->resume, ->disconnect, ->reset, and ->setup callbacks to the gadget driver
+ * until async callbacks are again enabled. A simple-minded but effective
+ * way to accomplish this is to tell the UDC hardware not to generate any
+ * more IRQs.
+ *
+ * Request completion callbacks must still be issued. However, it's okay
+ * to defer them until the request is cancelled, since the pull-up will be
+ * turned off during the time period when async callbacks are disabled.
+ *
+ * This routine will always be called in process context.
+ */
+static inline void usb_gadget_disable_async_callbacks(struct usb_udc *udc)
+{
+ struct usb_gadget *gadget = udc->gadget;
+
+ if (gadget->ops->udc_async_callbacks)
+ gadget->ops->udc_async_callbacks(gadget, false);
+}
+
+/**
+ * usb_initialize_gadget - initialize a gadget and its embedded struct device
* @parent: the parent device to this udc. Usually the controller driver's
* device.
- * @gadget: the gadget to be added to the list.
+ * @gadget: the gadget to be initialized.
* @release: a gadget release function.
+ */
+void usb_initialize_gadget(struct device *parent, struct usb_gadget *gadget,
+ void (*release)(struct device *dev))
+{
+ gadget->dev.parent = parent;
+ gadget->dev.bus = &gadget_bus_type;
+}
+EXPORT_SYMBOL_GPL(usb_initialize_gadget);
+
+/**
+ * usb_add_gadget - adds a new gadget to the udc class driver list
+ * @gadget: the gadget to be added to the list.
*
* Returns zero on success, negative errno otherwise.
+ * Does not do a final usb_put_gadget() if an error occurs.
*/
-int usb_add_gadget_udc_release(struct device *parent,
- struct usb_gadget *gadget,
- void (*release)(struct device *dev))
+int usb_add_gadget(struct usb_gadget *gadget)
{
struct usb_udc *udc;
int ret = -ENOMEM;
udc = kzalloc(sizeof(*udc), GFP_KERNEL);
if (!udc)
- goto err1;
+ goto error;
- dev_set_name(&gadget->dev, "usbgadget");
- gadget->dev.id = DEVICE_ID_SINGLE;
- gadget->dev.parent = parent;
+ udc->dev.parent = gadget->dev.parent;
+ ret = dev_set_name(&udc->dev, "usbgadget");
+ if (ret)
+ goto err_put_udc;
+
+ udc->gadget = gadget;
+ gadget->udc = udc;
+
+ udc->started = false;
+
+ mutex_lock(&udc_lock);
+ list_add_tail(&udc->list, &udc_list);
+ mutex_unlock(&udc_lock);
+
+ ret = register_device(&udc->dev);
+ if (ret)
+ goto err_unlist_udc;
+
+ usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);
+ udc->vbus = true;
+
+ ret = gadget_id_numbers++;
+ if (ret < 0)
+ goto err_del_udc;
+ gadget->id_number = ret;
+ dev_set_name(&gadget->dev, "gadget.%d", ret);
ret = register_device(&gadget->dev);
if (ret)
- goto err2;
+ goto err_free_id;
dev_add_param_uint32(&gadget->dev, "product", NULL, NULL,
- &gadget->product_id, "0x%04x", NULL);
+ &gadget->product_id, "0x%04x", NULL);
dev_add_param_uint32(&gadget->dev, "vendor", NULL, NULL,
- &gadget->vendor_id, "0x%04x", NULL);
+ &gadget->vendor_id, "0x%04x", NULL);
gadget->manufacturer = xstrdup("barebox");
dev_add_param_string(&gadget->dev, "manufacturer", NULL, NULL,
- &gadget->manufacturer, NULL);
+ &gadget->manufacturer, NULL);
gadget->productname = xstrdup(barebox_get_model());
dev_add_param_string(&gadget->dev, "productname", NULL, NULL,
- &gadget->productname, NULL);
+ &gadget->productname, NULL);
gadget->serialnumber = xstrdup("");
dev_add_param_string(&gadget->dev, "serialnumber", NULL, NULL,
- &gadget->serialnumber, NULL);
+ &gadget->serialnumber, NULL);
- dev_set_name(&udc->dev, "udc");
- udc->dev.id = DEVICE_ID_DYNAMIC;
+ return 0;
- udc->gadget = gadget;
+ err_free_id:
+ err_del_udc:
+ unregister_device(&udc->dev);
- list_add_tail(&udc->list, &udc_list);
+ err_unlist_udc:
+ mutex_lock(&udc_lock);
+ list_del(&udc->list);
+ mutex_unlock(&udc_lock);
- register_device(&udc->dev);
+ err_put_udc:
+ error:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(usb_add_gadget);
- usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED);
+int usb_gadget_poll(void)
+{
+ struct usb_udc *udc;
+
+ list_for_each_entry(udc, &udc_list, list) {
+ if (udc->gadget->ops->udc_poll)
+ udc->gadget->ops->udc_poll(udc->gadget);
+ }
return 0;
-err2:
- kfree(udc);
+}
+
+/**
+ * usb_add_gadget_udc_release - adds a new gadget to the udc class driver list
+ * @parent: the parent device to this udc. Usually the controller driver's
+ * device.
+ * @gadget: the gadget to be added to the list.
+ * @release: a gadget release function.
+ *
+ * Returns zero on success, negative errno otherwise.
+ * Calls the gadget release function in the latter case.
+ */
+int usb_add_gadget_udc_release(struct device *parent, struct usb_gadget
*gadget,
+ void (*release)(struct device *dev))
+{
+ int ret;
-err1:
+ usb_initialize_gadget(parent, gadget, release);
+ ret = usb_add_gadget(gadget);
+ if (ret)
+ usb_put_gadget(gadget);
return ret;
}
EXPORT_SYMBOL_GPL(usb_add_gadget_udc_release);
+/**
+ * usb_get_gadget_udc_name - get the name of the first UDC controller
+ * This functions returns the name of the first UDC controller in the system.
+ * Please note that this interface is usefull only for legacy drivers which
+ * assume that there is only one UDC controller in the system and they need to
+ * get its name before initialization. There is no guarantee that the UDC
+ * of the returned name will be still available, when gadget driver registers
+ * itself.
+ *
+ * Returns pointer to string with UDC controller name on success, NULL
+ * otherwise. Caller should kfree() returned string.
+ */
+char *usb_get_gadget_udc_name(void)
+{
+ struct usb_udc *udc;
+ char *name = NULL;
+
+ /* For now we take the first available UDC */
+ mutex_lock(&udc_lock);
+ list_for_each_entry(udc, &udc_list, list) {
+ if (!udc->driver) {
+ name = kstrdup(udc->gadget->name, GFP_KERNEL);
+ break;
+ }
+ }
+ mutex_unlock(&udc_lock);
+ return name;
+}
+EXPORT_SYMBOL_GPL(usb_get_gadget_udc_name);
+
/**
* usb_add_gadget_udc - adds a new gadget to the udc class driver list
* @parent: the parent device to this udc. Usually the controller
@@ -185,57 +1303,65 @@ int usb_add_gadget_udc(struct device *parent, struct
usb_gadget *gadget)
}
EXPORT_SYMBOL_GPL(usb_add_gadget_udc);
-static void usb_gadget_remove_driver(struct usb_udc *udc)
+/**
+ * usb_del_gadget - deletes a gadget and unregisters its udc
+ * @gadget: the gadget to be deleted.
+ *
+ * This will unbind @gadget, if it is bound.
+ * It will not do a final usb_put_gadget().
+ */
+void usb_del_gadget(struct usb_gadget *gadget)
{
- dev_dbg(&udc->dev, "unregistering UDC driver [%s]\n",
- udc->gadget->name);
+ struct usb_udc *udc = gadget->udc;
- if (udc->gadget->ops->udc_poll)
- poller_unregister(&udc->poller);
+ if (!udc)
+ return;
- usb_gadget_disconnect(udc->gadget);
- udc->driver->disconnect(udc->gadget);
- udc->driver->unbind(udc->gadget);
- usb_gadget_udc_stop(udc->gadget, NULL);
+ dev_vdbg(gadget->dev.parent, "unregistering gadget\n");
- udc->driver = NULL;
- udc->dev.driver = NULL;
- udc->gadget->dev.driver = NULL;
+ mutex_lock(&udc_lock);
+ list_del(&udc->list);
+ mutex_unlock(&udc_lock);
+
+ unregister_device(&gadget->dev);
+ unregister_device(&udc->dev);
}
+EXPORT_SYMBOL_GPL(usb_del_gadget);
/**
- * usb_del_gadget_udc - deletes @udc from udc_list
- * @gadget: the gadget to be removed.
+ * usb_del_gadget_udc - unregisters a gadget
+ * @gadget: the gadget to be unregistered.
*
- * This, will call usb_gadget_unregister_driver() if
- * the @udc is still busy.
+ * Calls usb_del_gadget() and does a final usb_put_gadget().
*/
void usb_del_gadget_udc(struct usb_gadget *gadget)
{
- struct usb_udc *udc = NULL;
-
- list_for_each_entry(udc, &udc_list, list)
- if (udc->gadget == gadget)
- goto found;
-
- dev_err(gadget->dev.parent, "gadget not registered.\n");
+ usb_del_gadget(gadget);
+ usb_put_gadget(gadget);
+}
+EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
- return;
+/* ------------------------------------------------------------------------- */
-found:
- dev_vdbg(gadget->dev.parent, "unregistering gadget\n");
+static int gadget_match_driver(struct device *dev, struct driver *drv)
+{
+ struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+ struct usb_udc *udc = gadget->udc;
+ struct usb_gadget_driver *driver = container_of(drv,
+ struct usb_gadget_driver, driver);
- list_del(&udc->list);
+ /* If the driver specifies a udc_name, it must match the UDC's name */
+ if (driver->udc_name &&
+ strcmp(driver->udc_name, dev_name(&udc->dev)) != 0)
+ return -1;
- if (udc->driver)
- usb_gadget_remove_driver(udc);
+ /* If the driver is already bound to a gadget, it doesn't match */
+ if (driver->is_bound)
+ return -1;
- unregister_device(&udc->dev);
- unregister_device(&gadget->dev);
+ /* Otherwise any gadget driver matches any UDC */
+ return 0;
}
-EXPORT_SYMBOL_GPL(usb_del_gadget_udc);
-
-/* ------------------------------------------------------------------------- */
static void udc_poll_driver(struct poller_struct *poller)
{
@@ -244,16 +1370,26 @@ static void udc_poll_driver(struct poller_struct *poller)
udc->gadget->ops->udc_poll(udc->gadget);
}
-static int udc_bind_to_driver(struct usb_udc *udc, struct usb_gadget_driver
*driver)
+static int gadget_bind_driver(struct device *dev)
{
- int ret;
-
- dev_dbg(&udc->dev, "registering UDC driver [%s]\n",
- driver->function);
+ struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+ struct usb_udc *udc = gadget->udc;
+ struct usb_gadget_driver *driver = container_of(dev->driver,
+ struct usb_gadget_driver, driver);
+ int ret = 0;
+ mutex_lock(&udc_lock);
+ if (driver->is_bound) {
+ mutex_unlock(&udc_lock);
+ return -ENXIO; /* Driver binds to only one gadget */
+ }
+ driver->is_bound = true;
udc->driver = driver;
- udc->dev.driver = &driver->driver;
- udc->gadget->dev.driver = &driver->driver;
+ mutex_unlock(&udc_lock);
+
+ dev_dbg(&udc->dev, "binding gadget driver [%s]\n", driver->function);
+
+ usb_gadget_udc_set_speed(udc, driver->max_speed);
if (udc->gadget->ops->udc_poll) {
udc->poller.func = udc_poll_driver;
@@ -264,92 +1400,114 @@ static int udc_bind_to_driver(struct usb_udc *udc,
struct usb_gadget_driver *dri
ret = driver->bind(udc->gadget, driver);
if (ret)
- goto err1;
+ goto err_bind;
- ret = usb_gadget_udc_start(udc->gadget, driver);
- if (ret) {
- driver->unbind(udc->gadget);
- goto err1;
- }
- usb_gadget_connect(udc->gadget);
+ ret = usb_gadget_udc_start(udc);
+ if (ret)
+ goto err_start;
+ usb_gadget_enable_async_callbacks(udc);
+ usb_udc_connect_control(udc);
return 0;
-err1:
- if (udc->gadget->ops->udc_poll)
- poller_unregister(&udc->poller);
+ err_start:
+ driver->unbind(udc->gadget);
+
+ err_bind:
if (ret != -EISNAM)
dev_err(&udc->dev, "failed to start %s: %d\n",
- udc->driver->function, ret);
+ driver->function, ret);
+
+ mutex_lock(&udc_lock);
udc->driver = NULL;
- udc->dev.driver = NULL;
- udc->gadget->dev.driver = NULL;
+ driver->is_bound = false;
+ mutex_unlock(&udc_lock);
+
return ret;
}
-int udc_attach_driver(const char *name, struct usb_gadget_driver *driver)
+static void gadget_unbind_driver(struct device *dev)
{
- struct usb_udc *udc = NULL;
- int ret = -ENODEV;
+ struct usb_gadget *gadget = dev_to_usb_gadget(dev);
+ struct usb_udc *udc = gadget->udc;
+ struct usb_gadget_driver *driver = udc->driver;
- list_for_each_entry(udc, &udc_list, list) {
- ret = strcmp(name, dev_name(&udc->dev));
- if (!ret)
- break;
- }
- if (ret) {
- ret = -ENODEV;
- goto out;
- }
- if (udc->driver) {
- ret = -EBUSY;
- goto out;
- }
- ret = udc_bind_to_driver(udc, driver);
-out:
- return ret;
+ dev_dbg(&udc->dev, "unbinding gadget driver [%s]\n", driver->function);
+
+ if (udc->gadget->ops->udc_poll)
+ poller_unregister(&udc->poller);
+
+ usb_gadget_disconnect(gadget);
+ usb_gadget_disable_async_callbacks(udc);
+ udc->driver->unbind(gadget);
+ usb_gadget_udc_stop(udc);
+
+ mutex_lock(&udc_lock);
+ driver->is_bound = false;
+ udc->driver = NULL;
+ mutex_unlock(&udc_lock);
}
-EXPORT_SYMBOL_GPL(udc_attach_driver);
-int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
+/* ------------------------------------------------------------------------- */
+
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
{
- struct usb_udc *udc = NULL;
- int ret;
+ int ret;
if (!driver || !driver->bind || !driver->setup)
return -EINVAL;
- list_for_each_entry(udc, &udc_list, list) {
- /* For now we take the first one */
- if (!udc->driver)
- goto found;
+ driver->driver.bus = &gadget_bus_type;
+ ret = register_driver(&driver->driver);
+ if (ret) {
+ pr_warn("%s: driver registration failed: %d\n",
+ driver->function, ret);
+ return ret;
}
- pr_debug("couldn't find an available UDC\n");
-
- return -ENODEV;
-found:
- ret = udc_bind_to_driver(udc, driver);
+ mutex_lock(&udc_lock);
+ if (!driver->is_bound) {
+ if (driver->match_existing_only) {
+ pr_warn("%s: couldn't find an available UDC or it's
busy\n",
+ driver->function);
+ ret = -EBUSY;
+ } else {
+ pr_info("%s: couldn't find an available UDC\n",
+ driver->function);
+ ret = 0;
+ }
+ }
+ mutex_unlock(&udc_lock);
+ if (ret)
+ unregister_driver(&driver->driver);
return ret;
}
-EXPORT_SYMBOL_GPL(usb_gadget_probe_driver);
+EXPORT_SYMBOL_GPL(usb_gadget_register_driver);
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
{
- struct usb_udc *udc = NULL;
- int ret = -ENODEV;
-
if (!driver || !driver->unbind)
return -EINVAL;
- list_for_each_entry(udc, &udc_list, list)
- if (udc->driver == driver) {
- usb_gadget_remove_driver(udc);
- ret = 0;
- break;
- }
-
- return ret;
+ unregister_driver(&driver->driver);
+ return 0;
}
EXPORT_SYMBOL_GPL(usb_gadget_unregister_driver);
+
+/* ------------------------------------------------------------------------- */
+
+static struct bus_type gadget_bus_type = {
+ .name = "gadget",
+ .probe = gadget_bind_driver,
+ .remove = gadget_unbind_driver,
+ .match = gadget_match_driver,
+};
+
+static int usb_udc_init(void)
+{
+ bus_register(&gadget_bus_type);
+
+ return 0;
+}
+coredevice_initcall(usb_udc_init);
diff --git a/drivers/usb/gadget/udc/fsl_udc.c b/drivers/usb/gadget/udc/fsl_udc.c
index 06768bf1d0..6a1d4304df 100644
--- a/drivers/usb/gadget/udc/fsl_udc.c
+++ b/drivers/usb/gadget/udc/fsl_udc.c
@@ -1646,7 +1646,7 @@ static int fsl_udc_start(struct usb_gadget *gadget,
struct usb_gadget_driver *dr
}
/* Disconnect from gadget driver */
-static int fsl_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver
*driver)
+static int fsl_udc_stop(struct usb_gadget *gadget)
{
struct fsl_udc *udc = to_fsl_udc(gadget);
struct fsl_ep *loop_ep;
diff --git a/drivers/usb/gadget/udc/pxa27x_udc.c
b/drivers/usb/gadget/udc/pxa27x_udc.c
index ae02a1bede..67b7e28de9 100644
--- a/drivers/usb/gadget/udc/pxa27x_udc.c
+++ b/drivers/usb/gadget/udc/pxa27x_udc.c
@@ -869,7 +869,7 @@ static int pxa_udc_vbus_session(struct usb_gadget *_gadget,
int is_active)
}
static int pxa_udc_start(struct usb_gadget *gadget, struct usb_gadget_driver
*driver);
-static int pxa_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver
*driver);
+static int pxa_udc_stop(struct usb_gadget *gadget);
static void pxa_udc_gadget_poll(struct usb_gadget *gadget);
static const struct usb_gadget_ops pxa_udc_ops = {
@@ -987,36 +987,26 @@ static int pxa_udc_start(struct usb_gadget *gadget,
struct usb_gadget_driver *dr
return 0;
}
-static void stop_activity(struct pxa_udc *udc, struct usb_gadget_driver
*driver)
+static void stop_activity(struct pxa_udc *udc)
{
int i;
- /* don't disconnect drivers more than once */
- if (udc->gadget.speed == USB_SPEED_UNKNOWN)
- driver = NULL;
udc->gadget.speed = USB_SPEED_UNKNOWN;
for (i = 0; i < NR_USB_ENDPOINTS; i++)
pxa_ep_disable(&udc->udc_usb_ep[i].usb_ep);
-
- if (driver)
- driver->disconnect(&udc->gadget);
}
-static int pxa_udc_stop(struct usb_gadget *gadget, struct usb_gadget_driver
*driver)
+static int pxa_udc_stop(struct usb_gadget *gadget)
{
struct pxa_udc *udc = the_controller;
if (!udc)
return -ENODEV;
- if (!driver || driver != udc->driver || !driver->unbind)
- return -EINVAL;
- stop_activity(udc, driver);
+ stop_activity(udc);
udc_disable(udc);
- driver->disconnect(&udc->gadget);
- driver->unbind(&udc->gadget);
udc->driver = NULL;
/*
@@ -1348,7 +1338,7 @@ static void irq_udc_reset(struct pxa_udc *udc)
if ((udccr & UDCCR_UDA) == 0) {
dev_dbg(udc->dev, "USB reset start\n");
- stop_activity(udc, udc->driver);
+ stop_activity(udc);
}
udc->gadget.speed = USB_SPEED_FULL;
@@ -1369,7 +1359,7 @@ static void pxa_udc_gadget_poll(struct usb_gadget *gadget)
if (should_enable_udc(udc))
udc_enable(udc);
if (should_disable_udc(udc)) {
- stop_activity(udc, udc->driver);
+ stop_activity(udc);
udc_disable(udc);
}
diff --git a/drivers/usb/gadget/usbstring.c b/drivers/usb/gadget/usbstring.c
index 4a0f7c09b9..58eb28ad1a 100644
--- a/drivers/usb/gadget/usbstring.c
+++ b/drivers/usb/gadget/usbstring.c
@@ -97,7 +97,7 @@ fail:
* characters (which are also widely used in C strings).
*/
int
-usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf)
+usb_gadget_get_string (const struct usb_gadget_strings *table, int id, u8 *buf)
{
struct usb_string *s;
int len;
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index c28049c062..87d6602f74 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -991,8 +991,7 @@ static void musb_gadget_poll(struct usb_gadget *gadget)
static int musb_gadget_start(struct usb_gadget *g,
struct usb_gadget_driver *driver);
-static int musb_gadget_stop(struct usb_gadget *g,
- struct usb_gadget_driver *driver);
+static int musb_gadget_stop(struct usb_gadget *g);
static const struct usb_gadget_ops musb_gadget_operations = {
.get_frame = musb_gadget_get_frame,
@@ -1167,16 +1166,9 @@ err:
return retval;
}
-static void stop_activity(struct musb *musb, struct usb_gadget_driver *driver)
+static void stop_activity(struct musb *musb)
{
- int i;
- struct musb_hw_ep *hw_ep;
-
- /* don't disconnect if it's not connected */
- if (musb->g.speed == USB_SPEED_UNKNOWN)
- driver = NULL;
- else
- musb->g.speed = USB_SPEED_UNKNOWN;
+ musb->g.speed = USB_SPEED_UNKNOWN;
/* deactivate the hardware */
if (musb->softconnect) {
@@ -1184,25 +1176,6 @@ static void stop_activity(struct musb *musb, struct
usb_gadget_driver *driver)
musb_pullup(musb, 0);
}
musb_stop(musb);
-
- /* killing any outstanding requests will quiesce the driver;
- * then report disconnect
- */
- if (driver) {
- for (i = 0, hw_ep = musb->endpoints;
- i < musb->nr_endpoints;
- i++, hw_ep++) {
- musb_ep_select(musb->mregs, i);
- if (hw_ep->is_shared_fifo /* || !epnum */) {
- nuke(&hw_ep->ep_in, -ESHUTDOWN);
- } else {
- if (hw_ep->max_packet_sz_tx)
- nuke(&hw_ep->ep_in, -ESHUTDOWN);
- if (hw_ep->max_packet_sz_rx)
- nuke(&hw_ep->ep_out, -ESHUTDOWN);
- }
- }
- }
}
/*
@@ -1211,8 +1184,7 @@ static void stop_activity(struct musb *musb, struct
usb_gadget_driver *driver)
*
* @param driver the gadget driver to unregister
*/
-static int musb_gadget_stop(struct usb_gadget *g,
- struct usb_gadget_driver *driver)
+static int musb_gadget_stop(struct usb_gadget *g)
{
struct musb *musb = gadget_to_musb(g);
unsigned long flags;
@@ -1226,10 +1198,7 @@ static int musb_gadget_stop(struct usb_gadget *g,
(void) musb_gadget_vbus_draw(&musb->g, 0);
- stop_activity(musb, driver);
-
- dev_dbg(musb->controller, "unregistering driver %s\n",
- driver ? driver->function : "(removed)");
+ stop_activity(musb);
musb->is_active = 0;
musb->gadget_driver = NULL;
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 746311fddd..a9b45bb824 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -1,15 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* <linux/usb/gadget.h>
*
* We call the USB code inside a Linux-based peripheral device a "gadget"
* driver, except for the hardware-specific bus glue. One USB host can
- * master many USB gadgets, but the gadgets are only slaved to one host.
+ * talk to many USB gadgets, but the gadgets are only able to communicate
+ * to one host.
*
*
* (C) Copyright 2002-2004 by David Brownell
* All Rights Reserved.
- *
- * This software is licensed under the GNU GPL version 2.
*/
#ifndef __LINUX_USB_GADGET_H
@@ -20,6 +20,10 @@
#include <driver.h>
#include <linux/list.h>
#include <linux/usb/ch9.h>
+#include <linux/mutex.h>
+#include <work.h>
+
+#define UDC_TRACE_STR_MAX 512
struct usb_ep;
@@ -35,6 +39,8 @@ struct usb_ep;
* @num_mapped_sgs: number of SG entries mapped to DMA (internal)
* @length: Length of that data
* @stream_id: The stream id, when USB3.0 bulk streams are being used
+ * @is_last: Indicates if this is the last request of a stream_id before
+ * switching to a different stream (required for DWC3 controllers).
* @no_interrupt: If true, hints that no completion irq is needed.
* Helpful sometimes with deep request queues that are handled
* directly by DMA controllers.
@@ -42,6 +48,7 @@ struct usb_ep;
* by adding a zero length packet as needed;
* @short_not_ok: When reading data, makes short packets be
* treated as errors (queue stops advancing till cleanup).
+ * @dma_mapped: Indicates if request has been mapped to DMA (internal)
* @complete: Function called when request completes, so this request and
* its buffer may be re-used. The function will always be called with
* interrupts disabled, and it must not sleep.
@@ -53,6 +60,8 @@ struct usb_ep;
* invalidated by the error may first be dequeued.
* @context: For use by the completion callback
* @list: For use by the gadget driver.
+ * @frame_number: Reports the interval number in (micro)frame in which the
+ * isochronous transfer was transmitted or received.
* @status: Reports completion code, zero or a negative errno.
* Normally, faults block the transfer queue from advancing until
* the completion callback returns.
@@ -94,15 +103,19 @@ struct usb_request {
unsigned num_mapped_sgs;
unsigned stream_id:16;
+ unsigned is_last:1;
unsigned no_interrupt:1;
unsigned zero:1;
unsigned short_not_ok:1;
+ unsigned dma_mapped:1;
void (*complete)(struct usb_ep *ep,
struct usb_request *req);
void *context;
struct list_head list;
+ unsigned frame_number; /* ISO ONLY */
+
int status;
unsigned actual;
};
@@ -120,6 +133,7 @@ struct usb_ep_ops {
int (*enable) (struct usb_ep *ep,
const struct usb_endpoint_descriptor *desc);
int (*disable) (struct usb_ep *ep);
+ void (*dispose) (struct usb_ep *ep);
struct usb_request *(*alloc_request) (struct usb_ep *ep);
void (*free_request) (struct usb_ep *ep, struct usb_request *req);
@@ -134,14 +148,55 @@ struct usb_ep_ops {
void (*fifo_flush) (struct usb_ep *ep);
};
+/**
+ * struct usb_ep_caps - endpoint capabilities description
+ * @type_control:Endpoint supports control type (reserved for ep0).
+ * @type_iso:Endpoint supports isochronous transfers.
+ * @type_bulk:Endpoint supports bulk transfers.
+ * @type_int:Endpoint supports interrupt transfers.
+ * @dir_in:Endpoint supports IN direction.
+ * @dir_out:Endpoint supports OUT direction.
+ */
+struct usb_ep_caps {
+ unsigned type_control:1;
+ unsigned type_iso:1;
+ unsigned type_bulk:1;
+ unsigned type_int:1;
+ unsigned dir_in:1;
+ unsigned dir_out:1;
+};
+
+#define USB_EP_CAPS_TYPE_CONTROL 0x01
+#define USB_EP_CAPS_TYPE_ISO 0x02
+#define USB_EP_CAPS_TYPE_BULK 0x04
+#define USB_EP_CAPS_TYPE_INT 0x08
+#define USB_EP_CAPS_TYPE_ALL \
+ (USB_EP_CAPS_TYPE_ISO | USB_EP_CAPS_TYPE_BULK | USB_EP_CAPS_TYPE_INT)
+#define USB_EP_CAPS_DIR_IN 0x01
+#define USB_EP_CAPS_DIR_OUT 0x02
+#define USB_EP_CAPS_DIR_ALL (USB_EP_CAPS_DIR_IN | USB_EP_CAPS_DIR_OUT)
+
+#define USB_EP_CAPS(_type, _dir) \
+ { \
+ .type_control = !!(_type & USB_EP_CAPS_TYPE_CONTROL), \
+ .type_iso = !!(_type & USB_EP_CAPS_TYPE_ISO), \
+ .type_bulk = !!(_type & USB_EP_CAPS_TYPE_BULK), \
+ .type_int = !!(_type & USB_EP_CAPS_TYPE_INT), \
+ .dir_in = !!(_dir & USB_EP_CAPS_DIR_IN), \
+ .dir_out = !!(_dir & USB_EP_CAPS_DIR_OUT), \
+ }
+
/**
* struct usb_ep - device side representation of USB endpoint
* @name:identifier for the endpoint, such as "ep-a" or "ep9in-bulk"
* @ops: Function pointers used to access hardware-specific operations.
* @ep_list:the gadget's ep_list holds all of its endpoints
+ * @caps:The structure describing types and directions supported by endpoint.
+ * @enabled: The current endpoint enabled/disabled state.
+ * @claimed: True if this endpoint is claimed by a function.
* @maxpacket:The maximum packet size used on this endpoint. The initial
* value can sometimes be reduced (hardware allowing), according to
- * the endpoint descriptor used to configure the endpoint.
+ * the endpoint descriptor used to configure the endpoint.
* @maxpacket_limit:The maximum packet size value which can be handled by this
* endpoint. It's set once by UDC driver when endpoint is initialized, and
* should not be changed. Should not be confused with maxpacket.
@@ -161,12 +216,16 @@ struct usb_ep_ops {
* gadget->ep_list. the control endpoint (gadget->ep0) is not in that list,
* and is accessed only in response to a driver setup() callback.
*/
+
struct usb_ep {
void *driver_data;
const char *name;
const struct usb_ep_ops *ops;
struct list_head ep_list;
+ struct usb_ep_caps caps;
+ bool claimed;
+ bool enabled;
unsigned maxpacket:16;
unsigned maxpacket_limit:16;
unsigned max_streams:16;
@@ -179,280 +238,49 @@ struct usb_ep {
/*-------------------------------------------------------------------------*/
-/**
- * usb_ep_set_maxpacket_limit - set maximum packet size limit for endpoint
- * @ep:the endpoint being configured
- * @maxpacket_limit:value of maximum packet size limit
- *
- * This function shoud be used only in UDC drivers to initialize endpoint
- * (usually in probe function).
- */
+#if IS_ENABLED(CONFIG_USB_GADGET)
+void usb_ep_set_maxpacket_limit(struct usb_ep *ep, unsigned maxpacket_limit);
+int usb_ep_enable(struct usb_ep *ep);
+int usb_ep_disable(struct usb_ep *ep);
+struct usb_request *usb_ep_alloc_request(struct usb_ep *ep);
+void usb_ep_free_request(struct usb_ep *ep, struct usb_request *req);
+int usb_ep_queue(struct usb_ep *ep, struct usb_request *req);
+int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req);
+int usb_ep_set_halt(struct usb_ep *ep);
+int usb_ep_clear_halt(struct usb_ep *ep);
+int usb_ep_set_wedge(struct usb_ep *ep);
+int usb_ep_fifo_status(struct usb_ep *ep);
+void usb_ep_fifo_flush(struct usb_ep *ep);
+#else
static inline void usb_ep_set_maxpacket_limit(struct usb_ep *ep,
- unsigned maxpacket_limit)
-{
- ep->maxpacket_limit = maxpacket_limit;
- ep->maxpacket = maxpacket_limit;
-}
-
-/**
- * usb_ep_enable - configure endpoint, making it usable
- * @ep:the endpoint being configured. may not be the endpoint named "ep0".
- * drivers discover endpoints through the ep_list of a usb_gadget.
- *
- * When configurations are set, or when interface settings change, the driver
- * will enable or disable the relevant endpoints. while it is enabled, an
- * endpoint may be used for i/o until the driver receives a disconnect() from
- * the host or until the endpoint is disabled.
- *
- * the ep0 implementation (which calls this routine) must ensure that the
- * hardware capabilities of each endpoint match the descriptor provided
- * for it. for example, an endpoint named "ep2in-bulk" would be usable
- * for interrupt transfers as well as bulk, but it likely couldn't be used
- * for iso transfers or for endpoint 14. some endpoints are fully
- * configurable, with more generic names like "ep-a". (remember that for
- * USB, "in" means "towards the USB master".)
- *
- * returns zero, or a negative error code.
- */
+ unsigned maxpacket_limit)
+{ }
static inline int usb_ep_enable(struct usb_ep *ep)
-{
- return ep->ops->enable(ep, ep->desc);
-}
-
-/**
- * usb_ep_disable - endpoint is no longer usable
- * @ep:the endpoint being unconfigured. may not be the endpoint named "ep0".
- *
- * no other task may be using this endpoint when this is called.
- * any pending and uncompleted requests will complete with status
- * indicating disconnect (-ESHUTDOWN) before this call returns.
- * gadget drivers must call usb_ep_enable() again before queueing
- * requests to the endpoint.
- *
- * returns zero, or a negative error code.
- */
+{ return 0; }
static inline int usb_ep_disable(struct usb_ep *ep)
-{
- return ep->ops->disable(ep);
-}
-
-/**
- * usb_ep_alloc_request - allocate a request object to use with this endpoint
- * @ep:the endpoint to be used with with the request
- * @gfp_flags:GFP_* flags to use
- *
- * Request objects must be allocated with this call, since they normally
- * need controller-specific setup and may even need endpoint-specific
- * resources such as allocation of DMA descriptors.
- * Requests may be submitted with usb_ep_queue(), and receive a single
- * completion callback. Free requests with usb_ep_free_request(), when
- * they are no longer needed.
- *
- * Returns the request, or null if one could not be allocated.
- */
-static inline struct usb_request *usb_ep_alloc_request(struct usb_ep *ep)
-{
- return ep->ops->alloc_request(ep);
-}
-
-/**
- * usb_ep_free_request - frees a request object
- * @ep:the endpoint associated with the request
- * @req:the request being freed
- *
- * Reverses the effect of usb_ep_alloc_request().
- * Caller guarantees the request is not queued, and that it will
- * no longer be requeued (or otherwise used).
- */
+{ return 0; }
+static inline struct usb_request *usb_ep_alloc_request(struct usb_ep *ep,
+ gfp_t gfp_flags)
+{ return NULL; }
static inline void usb_ep_free_request(struct usb_ep *ep,
- struct usb_request *req)
-{
- ep->ops->free_request(ep, req);
-}
-
-/**
- * usb_ep_queue - queues (submits) an I/O request to an endpoint.
- * @ep:the endpoint associated with the request
- * @req:the request being submitted
- * @gfp_flags: GFP_* flags to use in case the lower level driver couldn't
- * pre-allocate all necessary memory with the request.
- *
- * This tells the device controller to perform the specified request through
- * that endpoint (reading or writing a buffer). When the request completes,
- * including being canceled by usb_ep_dequeue(), the request's completion
- * routine is called to return the request to the driver. Any endpoint
- * (except control endpoints like ep0) may have more than one transfer
- * request queued; they complete in FIFO order. Once a gadget driver
- * submits a request, that request may not be examined or modified until it
- * is given back to that driver through the completion callback.
- *
- * Each request is turned into one or more packets. The controller driver
- * never merges adjacent requests into the same packet. OUT transfers
- * will sometimes use data that's already buffered in the hardware.
- * Drivers can rely on the fact that the first byte of the request's buffer
- * always corresponds to the first byte of some USB packet, for both
- * IN and OUT transfers.
- *
- * Bulk endpoints can queue any amount of data; the transfer is packetized
- * automatically. The last packet will be short if the request doesn't fill it
- * out completely. Zero length packets (ZLPs) should be avoided in portable
- * protocols since not all usb hardware can successfully handle zero length
- * packets. (ZLPs may be explicitly written, and may be implicitly written if
- * the request 'zero' flag is set.) Bulk endpoints may also be used
- * for interrupt transfers; but the reverse is not true, and some endpoints
- * won't support every interrupt transfer. (Such as 768 byte packets.)
- *
- * Interrupt-only endpoints are less functional than bulk endpoints, for
- * example by not supporting queueing or not handling buffers that are
- * larger than the endpoint's maxpacket size. They may also treat data
- * toggle differently.
- *
- * Control endpoints ... after getting a setup() callback, the driver queues
- * one response (even if it would be zero length). That enables the
- * status ack, after transferring data as specified in the response. Setup
- * functions may return negative error codes to generate protocol stalls.
- * (Note that some USB device controllers disallow protocol stall responses
- * in some cases.) When control responses are deferred (the response is
- * written after the setup callback returns), then usb_ep_set_halt() may be
- * used on ep0 to trigger protocol stalls. Depending on the controller,
- * it may not be possible to trigger a status-stage protocol stall when the
- * data stage is over, that is, from within the response's completion
- * routine.
- *
- * For periodic endpoints, like interrupt or isochronous ones, the usb host
- * arranges to poll once per interval, and the gadget driver usually will
- * have queued some data to transfer at that time.
- *
- * Returns zero, or a negative error code. Endpoints that are not enabled
- * report errors; errors will also be
- * reported when the usb peripheral is disconnected.
- */
-static inline int usb_ep_queue(struct usb_ep *ep,
- struct usb_request *req)
-{
- return ep->ops->queue(ep, req);
-}
-
-/**
- * usb_ep_dequeue - dequeues (cancels, unlinks) an I/O request from an endpoint
- * @ep:the endpoint associated with the request
- * @req:the request being canceled
- *
- * if the request is still active on the endpoint, it is dequeued and its
- * completion routine is called (with status -ECONNRESET); else a negative
- * error code is returned.
- *
- * note that some hardware can't clear out write fifos (to unlink the request
- * at the head of the queue) except as part of disconnecting from usb. such
- * restrictions prevent drivers from supporting configuration changes,
- * even to configuration zero (a "chapter 9" requirement).
- */
+ struct usb_request *req)
+{ }
+static inline int usb_ep_queue(struct usb_ep *ep, struct usb_request *req,
+ gfp_t gfp_flags)
+{ return 0; }
static inline int usb_ep_dequeue(struct usb_ep *ep, struct usb_request *req)
-{
- return ep->ops->dequeue(ep, req);
-}
-
-/**
- * usb_ep_set_halt - sets the endpoint halt feature.
- * @ep: the non-isochronous endpoint being stalled
- *
- * Use this to stall an endpoint, perhaps as an error report.
- * Except for control endpoints,
- * the endpoint stays halted (will not stream any data) until the host
- * clears this feature; drivers may need to empty the endpoint's request
- * queue first, to make sure no inappropriate transfers happen.
- *
- * Note that while an endpoint CLEAR_FEATURE will be invisible to the
- * gadget driver, a SET_INTERFACE will not be. To reset endpoints for the
- * current altsetting, see usb_ep_clear_halt(). When switching altsettings,
- * it's simplest to use usb_ep_enable() or usb_ep_disable() for the endpoints.
- *
- * Returns zero, or a negative error code. On success, this call sets
- * underlying hardware state that blocks data transfers.
- * Attempts to halt IN endpoints will fail (returning -EAGAIN) if any
- * transfer requests are still queued, or if the controller hardware
- * (usually a FIFO) still holds bytes that the host hasn't collected.
- */
+{ return 0; }
static inline int usb_ep_set_halt(struct usb_ep *ep)
-{
- return ep->ops->set_halt(ep, 1);
-}
-
-/**
- * usb_ep_clear_halt - clears endpoint halt, and resets toggle
- * @ep:the bulk or interrupt endpoint being reset
- *
- * Use this when responding to the standard usb "set interface" request,
- * for endpoints that aren't reconfigured, after clearing any other state
- * in the endpoint's i/o queue.
- *
- * Returns zero, or a negative error code. On success, this call clears
- * the underlying hardware state reflecting endpoint halt and data toggle.
- * Note that some hardware can't support this request (like pxa2xx_udc),
- * and accordingly can't correctly implement interface altsettings.
- */
+{ return 0; }
static inline int usb_ep_clear_halt(struct usb_ep *ep)
-{
- return ep->ops->set_halt(ep, 0);
-}
-
-/**
- * usb_ep_set_wedge - sets the halt feature and ignores clear requests
- * @ep: the endpoint being wedged
- *
- * Use this to stall an endpoint and ignore CLEAR_FEATURE(HALT_ENDPOINT)
- * requests. If the gadget driver clears the halt status, it will
- * automatically unwedge the endpoint.
- *
- * Returns zero on success, else negative errno.
- */
-static inline int
-usb_ep_set_wedge(struct usb_ep *ep)
-{
- if (ep->ops->set_wedge)
- return ep->ops->set_wedge(ep);
- else
- return ep->ops->set_halt(ep, 1);
-}
-
-/**
- * usb_ep_fifo_status - returns number of bytes in fifo, or error
- * @ep: the endpoint whose fifo status is being checked.
- *
- * FIFO endpoints may have "unclaimed data" in them in certain cases,
- * such as after aborted transfers. Hosts may not have collected all
- * the IN data written by the gadget driver (and reported by a request
- * completion). The gadget driver may not have collected all the data
- * written OUT to it by the host. Drivers that need precise handling for
- * fault reporting or recovery may need to use this call.
- *
- * This returns the number of such bytes in the fifo, or a negative
- * errno if the endpoint doesn't use a FIFO or doesn't support such
- * precise handling.
- */
+{ return 0; }
+static inline int usb_ep_set_wedge(struct usb_ep *ep)
+{ return 0; }
static inline int usb_ep_fifo_status(struct usb_ep *ep)
-{
- if (ep->ops->fifo_status)
- return ep->ops->fifo_status(ep);
- else
- return -EOPNOTSUPP;
-}
-
-/**
- * usb_ep_fifo_flush - flushes contents of a fifo
- * @ep: the endpoint whose fifo is being flushed.
- *
- * This call may be used to flush the "unclaimed data" that may exist in
- * an endpoint fifo after abnormal transaction terminations. The call
- * must never be used except when endpoint is not being used for any
- * protocol translation.
- */
+{ return 0; }
static inline void usb_ep_fifo_flush(struct usb_ep *ep)
-{
- if (ep->ops->fifo_flush)
- ep->ops->fifo_flush(ep);
-}
-
+{ }
+#endif /* USB_GADGET */
/*-------------------------------------------------------------------------*/
@@ -461,11 +289,15 @@ struct usb_dcd_config_params {
#define USB_DEFAULT_U1_DEV_EXIT_LAT 0x01 /* Less then 1 microsec */
__le16 bU2DevExitLat; /* U2 Device exit Latency */
#define USB_DEFAULT_U2_DEV_EXIT_LAT 0x1F4 /* Less then 500 microsec */
+ __u8 besl_baseline; /* Recommended baseline BESL (0-15) */
+ __u8 besl_deep; /* Recommended deep BESL (0-15) */
+#define USB_DEFAULT_BESL_UNSPECIFIED 0xFF /* No recommended value */
};
struct usb_gadget;
struct usb_gadget_driver;
+struct usb_udc;
/* the rest of the api to the controller hardware: device operations,
* which don't involve endpoints (or i/o).
@@ -479,17 +311,26 @@ 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 *);
+ void (*get_config_params)(struct usb_gadget *,
+ struct usb_dcd_config_params *);
int (*udc_start)(struct usb_gadget *,
struct usb_gadget_driver *);
- int (*udc_stop)(struct usb_gadget *,
- struct usb_gadget_driver *);
+ int (*udc_stop)(struct usb_gadget *);
void (*udc_poll)(struct usb_gadget *);
+ void (*udc_set_speed)(struct usb_gadget *, enum usb_device_speed);
+ void (*udc_set_ssp_rate)(struct usb_gadget *gadget,
+ enum usb_ssp_rate rate);
+ void (*udc_async_callbacks)(struct usb_gadget *gadget, bool enable);
+ struct usb_ep *(*match_ep)(struct usb_gadget *,
+ struct usb_endpoint_descriptor *,
+ struct usb_ss_ep_comp_descriptor *);
+ int (*check_config)(struct usb_gadget *gadget);
};
/**
- * struct usb_gadget - represents a usb slave device
+ * struct usb_gadget - represents a usb device
* @work: (internal use) Workqueue to be used for sysfs_notify()
+ * @udc: struct usb_udc pointer for this gadget
* @ops: Function pointers used to access hardware-specific operations.
* @ep0: Endpoint zero, used when reading or writing responses to
* driver setup() requests
@@ -497,12 +338,19 @@ struct usb_gadget_ops {
* @speed: Speed of current connection to USB host.
* @max_speed: Maximal speed the UDC can handle. UDC must support this
* and all slower speeds.
+ * @ssp_rate: Current connected SuperSpeed Plus signaling rate and lane count.
+ * @max_ssp_rate: Maximum SuperSpeed Plus signaling rate and lane count the UDC
+ * can handle. The UDC must support this and all slower speeds and lower
+ * number of lanes.
* @state: the state we are now (attached, suspended, configured, etc)
* @name: Identifies the controller hardware type. Used in diagnostics
* and sometimes configuration.
* @dev: Driver model state for this abstract device.
+ * @isoch_delay: value from Set Isoch Delay request. Only valid on SS/SSP
* @out_epnum: last used out ep number
* @in_epnum: last used in ep number
+ * @mA: last set mA value
+ * @otg_caps: OTG capabilities of this gadget.
* @sg_supported: true if we can handle scatter-gather
* @is_otg: True if the USB device port uses a Mini-AB jack, so that the
* gadget driver must provide a USB OTG descriptor.
@@ -515,8 +363,25 @@ struct usb_gadget_ops {
* only supports HNP on a different root port.
* @b_hnp_enable: OTG device feature flag, indicating that the A-Host
* enabled HNP support.
+ * @hnp_polling_support: OTG device feature flag, indicating if the OTG device
+ * in peripheral mode can support HNP polling.
+ * @host_request_flag: OTG device feature flag, indicating if A-Peripheral
+ * or B-Peripheral wants to take host role.
* @quirk_ep_out_aligned_size: epout requires buffer size to be aligned to
* MaxPacketSize.
+ * @quirk_altset_not_supp: UDC controller doesn't support alt settings.
+ * @quirk_stall_not_supp: UDC controller doesn't support stalling.
+ * @quirk_zlp_not_supp: UDC controller doesn't support ZLP.
+ * @quirk_avoids_skb_reserve: udc/platform wants to avoid skb_reserve() in
+ * u_ether.c to improve performance.
+ * @is_selfpowered: if the gadget is self-powered.
+ * @deactivated: True if gadget is deactivated - in deactivated state it cannot
+ * be connected.
+ * @connected: True if gadget is connected.
+ * @lpm_capable: If the gadget max_speed is FULL or HIGH, this flag
+ * indicates that it supports LPM as per the LPM ECN & errata.
+ * @irq: the interrupt number for device controller.
+ * @id_number: a unique ID number for ensuring that gadget names are distinct
*
* Gadgets have a mostly-portable "gadget driver" implementing device
* functions, handling all usb configurations and interfaces. Gadget
@@ -537,17 +402,27 @@ struct usb_gadget_ops {
* device is acting as a B-Peripheral (so is_a_peripheral is false).
*/
struct usb_gadget {
+ struct work_struct work;
+ struct usb_udc *udc;
/* readonly to gadget driver */
const struct usb_gadget_ops *ops;
struct usb_ep *ep0;
struct list_head ep_list; /* of usb_ep */
enum usb_device_speed speed;
enum usb_device_speed max_speed;
+
+ /* USB SuperSpeed Plus only */
+ enum usb_ssp_rate ssp_rate;
+ enum usb_ssp_rate max_ssp_rate;
+
enum usb_device_state state;
const char *name;
struct device dev;
+ unsigned isoch_delay;
unsigned out_epnum;
unsigned in_epnum;
+ unsigned mA;
+ struct usb_otg_caps *otg_caps;
unsigned sg_supported:1;
unsigned is_otg:1;
@@ -555,39 +430,79 @@ struct usb_gadget {
unsigned b_hnp_enable:1;
unsigned a_hnp_support:1;
unsigned a_alt_hnp_support:1;
+ unsigned hnp_polling_support:1;
+ unsigned host_request_flag:1;
unsigned quirk_ep_out_aligned_size:1;
+ unsigned quirk_altset_not_supp:1;
+ unsigned quirk_stall_not_supp:1;
+ unsigned quirk_zlp_not_supp:1;
+ unsigned quirk_avoids_skb_reserve:1;
+ unsigned is_selfpowered:1;
+ unsigned deactivated:1;
+ unsigned connected:1;
+ unsigned lpm_capable:1;
+ int irq;
+ int id_number;
uint32_t vendor_id;
uint32_t product_id;
char *manufacturer;
char *productname;
char *serialnumber;
+
+ void *drvdata;
};
#define work_to_gadget(w) (container_of((w), struct usb_gadget, work))
+/* Interface to the device model */
static inline void set_gadget_data(struct usb_gadget *gadget, void *data)
+ { gadget->drvdata = data; }
+static inline void *get_gadget_data(struct usb_gadget *gadget)
+ { return gadget->drvdata; }
+static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev)
{
- gadget->dev.priv = data;
+ return container_of(dev, struct usb_gadget, dev);
}
-
-static inline void *get_gadget_data(struct usb_gadget *gadget)
+static inline struct usb_gadget *usb_get_gadget(struct usb_gadget *gadget)
{
- return gadget->dev.priv;
+ return gadget;
}
-
-static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev)
+static inline void usb_put_gadget(struct usb_gadget *gadget)
{
- return container_of(dev, struct usb_gadget, dev);
}
+extern void usb_initialize_gadget(struct device *parent,
+ struct usb_gadget *gadget, void (*release)(struct device *dev));
+extern int usb_add_gadget(struct usb_gadget *gadget);
+extern void usb_del_gadget(struct usb_gadget *gadget);
+
+/* Legacy device-model interface */
+extern int usb_add_gadget_udc_release(struct device *parent,
+ struct usb_gadget *gadget, void (*release)(struct device *dev));
+extern int usb_add_gadget_udc(struct device *parent, struct usb_gadget
*gadget);
+extern void usb_del_gadget_udc(struct usb_gadget *gadget);
+extern char *usb_get_gadget_udc_name(void);
/* iterates the non-control endpoints; 'tmp' is a struct usb_ep pointer */
#define gadget_for_each_ep(tmp, gadget) \
list_for_each_entry(tmp, &(gadget)->ep_list, ep_list)
+/**
+ * usb_ep_align - returns @len aligned to ep's maxpacketsize.
+ * @ep: the endpoint whose maxpacketsize is used to align @len
+ * @len: buffer size's length to align to @ep's maxpacketsize
+ *
+ * This helper is used to align buffer's size to an ep's maxpacketsize.
+ */
+static inline size_t usb_ep_align(struct usb_ep *ep, size_t len)
+{
+ int max_packet_size = (size_t)usb_endpoint_maxp(ep->desc);
+
+ return round_up(len, max_packet_size);
+}
/**
* usb_ep_align_maybe - returns @len aligned to ep's maxpacketsize if gadget
- * requires quirk_ep_out_aligned_size, otherwise reguens len.
+ * requires quirk_ep_out_aligned_size, otherwise returns len.
* @g: controller to check for quirk
* @ep: the endpoint whose maxpacketsize is used to align @len
* @len: buffer size's length to align to @ep's maxpacketsize
@@ -598,212 +513,137 @@ static inline struct usb_gadget
*dev_to_usb_gadget(struct device *dev)
static inline size_t
usb_ep_align_maybe(struct usb_gadget *g, struct usb_ep *ep, size_t len)
{
- return !g->quirk_ep_out_aligned_size ? len :
- round_up(len, (size_t)ep->desc->wMaxPacketSize);
+ return g->quirk_ep_out_aligned_size ? usb_ep_align(ep, len) : len;
}
/**
- * gadget_is_dualspeed - return true iff the hardware handles high speed
- * @g: controller that might support both high and full speeds
+ * gadget_is_altset_supported - return true iff the hardware supports
+ * altsettings
+ * @g: controller to check for quirk
*/
-static inline int gadget_is_dualspeed(struct usb_gadget *g)
+static inline int gadget_is_altset_supported(struct usb_gadget *g)
{
- return g->max_speed >= USB_SPEED_HIGH;
+ return !g->quirk_altset_not_supp;
}
/**
- * gadget_is_superspeed() - return true if the hardware handles superspeed
- * @g: controller that might support superspeed
+ * gadget_is_stall_supported - return true iff the hardware supports stalling
+ * @g: controller to check for quirk
*/
-static inline int gadget_is_superspeed(struct usb_gadget *g)
+static inline int gadget_is_stall_supported(struct usb_gadget *g)
{
- return g->max_speed >= USB_SPEED_SUPER;
+ return !g->quirk_stall_not_supp;
}
/**
- * gadget_is_otg - return true iff the hardware is OTG-ready
- * @g: controller that might have a Mini-AB connector
- *
- * This is a runtime test, since kernels with a USB-OTG stack sometimes
- * run on boards which only have a Mini-B (or Mini-A) connector.
+ * gadget_is_zlp_supported - return true iff the hardware supports zlp
+ * @g: controller to check for quirk
*/
-static inline int gadget_is_otg(struct usb_gadget *g)
+static inline int gadget_is_zlp_supported(struct usb_gadget *g)
{
-#ifdef CONFIG_USB_OTG
- return g->is_otg;
-#else
- return 0;
-#endif
+ return !g->quirk_zlp_not_supp;
}
/**
- * usb_gadget_frame_number - returns the current frame number
- * @gadget: controller that reports the frame number
- *
- * Returns the usb frame number, normally eleven bits from a SOF packet,
- * or negative errno if this device doesn't support this capability.
+ * gadget_avoids_skb_reserve - return true iff the hardware would like to avoid
+ * skb_reserve to improve performance.
+ * @g: controller to check for quirk
*/
-static inline int usb_gadget_frame_number(struct usb_gadget *gadget)
+static inline int gadget_avoids_skb_reserve(struct usb_gadget *g)
{
- return gadget->ops->get_frame(gadget);
+ return g->quirk_avoids_skb_reserve;
}
/**
- * usb_gadget_wakeup - tries to wake up the host connected to this gadget
- * @gadget: controller used to wake up the host
- *
- * Returns zero on success, else negative error code if the hardware
- * doesn't support such attempts, or its support has not been enabled
- * by the usb host. Drivers must return device descriptors that report
- * their ability to support this, or hosts won't enable it.
- *
- * This may also try to use SRP to wake the host and start enumeration,
- * even if OTG isn't otherwise in use. OTG devices may also start
- * remote wakeup even when hosts don't explicitly enable it.
+ * gadget_is_dualspeed - return true iff the hardware handles high speed
+ * @g: controller that might support both high and full speeds
*/
-static inline int usb_gadget_wakeup(struct usb_gadget *gadget)
+static inline int gadget_is_dualspeed(struct usb_gadget *g)
{
- if (!gadget->ops->wakeup)
- return -EOPNOTSUPP;
- return gadget->ops->wakeup(gadget);
+ return g->max_speed >= USB_SPEED_HIGH;
}
/**
- * usb_gadget_set_selfpowered - sets the device selfpowered feature.
- * @gadget:the device being declared as self-powered
- *
- * this affects the device status reported by the hardware driver
- * to reflect that it now has a local power supply.
- *
- * returns zero on success, else negative errno.
+ * gadget_is_superspeed() - return true if the hardware handles superspeed
+ * @g: controller that might support superspeed
*/
-static inline int usb_gadget_set_selfpowered(struct usb_gadget *gadget)
+static inline int gadget_is_superspeed(struct usb_gadget *g)
{
- if (!gadget->ops->set_selfpowered)
- return -EOPNOTSUPP;
- return gadget->ops->set_selfpowered(gadget, 1);
+ return g->max_speed >= USB_SPEED_SUPER;
}
/**
- * usb_gadget_clear_selfpowered - clear the device selfpowered feature.
- * @gadget:the device being declared as bus-powered
- *
- * this affects the device status reported by the hardware driver.
- * some hardware may not support bus-powered operation, in which
- * case this feature's value can never change.
- *
- * returns zero on success, else negative errno.
+ * gadget_is_superspeed_plus() - return true if the hardware handles
+ * superspeed plus
+ * @g: controller that might support superspeed plus
*/
-static inline int usb_gadget_clear_selfpowered(struct usb_gadget *gadget)
+static inline int gadget_is_superspeed_plus(struct usb_gadget *g)
{
- if (!gadget->ops->set_selfpowered)
- return -EOPNOTSUPP;
- return gadget->ops->set_selfpowered(gadget, 0);
+ return g->max_speed >= USB_SPEED_SUPER_PLUS;
}
/**
- * usb_gadget_vbus_connect - Notify controller that VBUS is powered
- * @gadget:The device which now has VBUS power.
- * Context: can sleep
- *
- * This call is used by a driver for an external transceiver (or GPIO)
- * that detects a VBUS power session starting. Common responses include
- * resuming the controller, activating the D+ (or D-) pullup to let the
- * host detect that a USB device is attached, and starting to draw power
- * (8mA or possibly more, especially after SET_CONFIGURATION).
+ * gadget_is_otg - return true iff the hardware is OTG-ready
+ * @g: controller that might have a Mini-AB connector
*
- * Returns zero on success, else negative errno.
+ * This is a runtime test, since kernels with a USB-OTG stack sometimes
+ * run on boards which only have a Mini-B (or Mini-A) connector.
*/
-static inline int usb_gadget_vbus_connect(struct usb_gadget *gadget)
+static inline int gadget_is_otg(struct usb_gadget *g)
{
- if (!gadget->ops->vbus_session)
- return -EOPNOTSUPP;
- return gadget->ops->vbus_session(gadget, 1);
+#ifdef CONFIG_USB_OTG
+ return g->is_otg;
+#else
+ return 0;
+#endif
}
-/**
- * usb_gadget_vbus_draw - constrain controller's VBUS power usage
- * @gadget:The device whose VBUS usage is being described
- * @mA:How much current to draw, in milliAmperes. This should be twice
- * the value listed in the configuration descriptor bMaxPower field.
- *
- * This call is used by gadget drivers during SET_CONFIGURATION calls,
- * reporting how much power the device may consume. For example, this
- * could affect how quickly batteries are recharged.
- *
- * Returns zero on success, else negative errno.
- */
-static inline int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
-{
- if (!gadget->ops->vbus_draw)
- return -EOPNOTSUPP;
- return gadget->ops->vbus_draw(gadget, mA);
-}
+/*-------------------------------------------------------------------------*/
-/**
- * usb_gadget_vbus_disconnect - notify controller about VBUS session end
- * @gadget:the device whose VBUS supply is being described
- * Context: can sleep
- *
- * This call is used by a driver for an external transceiver (or GPIO)
- * that detects a VBUS power session ending. Common responses include
- * reversing everything done in usb_gadget_vbus_connect().
- *
- * Returns zero on success, else negative errno.
- */
+#if IS_ENABLED(CONFIG_USB_GADGET)
+int usb_gadget_frame_number(struct usb_gadget *gadget);
+int usb_gadget_wakeup(struct usb_gadget *gadget);
+int usb_gadget_set_selfpowered(struct usb_gadget *gadget);
+int usb_gadget_clear_selfpowered(struct usb_gadget *gadget);
+int usb_gadget_vbus_connect(struct usb_gadget *gadget);
+int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA);
+int usb_gadget_vbus_disconnect(struct usb_gadget *gadget);
+int usb_gadget_connect(struct usb_gadget *gadget);
+int usb_gadget_disconnect(struct usb_gadget *gadget);
+int usb_gadget_deactivate(struct usb_gadget *gadget);
+int usb_gadget_activate(struct usb_gadget *gadget);
+int usb_gadget_check_config(struct usb_gadget *gadget);
+#else
+static inline int usb_gadget_frame_number(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_wakeup(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_set_selfpowered(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_clear_selfpowered(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_vbus_connect(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
+{ return 0; }
static inline int usb_gadget_vbus_disconnect(struct usb_gadget *gadget)
-{
- if (!gadget->ops->vbus_session)
- return -EOPNOTSUPP;
- return gadget->ops->vbus_session(gadget, 0);
-}
-
-/**
- * usb_gadget_connect - software-controlled connect to USB host
- * @gadget:the peripheral being connected
- *
- * Enables the D+ (or potentially D-) pullup. The host will start
- * enumerating this gadget when the pullup is active and a VBUS session
- * is active (the link is powered). This pullup is always enabled unless
- * usb_gadget_disconnect() has been used to disable it.
- *
- * Returns zero on success, else negative errno.
- */
+{ return 0; }
static inline int usb_gadget_connect(struct usb_gadget *gadget)
-{
- if (!gadget->ops->pullup)
- return -EOPNOTSUPP;
- return gadget->ops->pullup(gadget, 1);
-}
-
-/**
- * usb_gadget_disconnect - software-controlled disconnect from USB host
- * @gadget:the peripheral being disconnected
- *
- * Disables the D+ (or potentially D-) pullup, which the host may see
- * as a disconnect (when a VBUS session is active). Not all systems
- * support software pullup controls.
- *
- * This routine may be used during the gadget driver bind() call to prevent
- * the peripheral from ever being visible to the USB host, unless later
- * usb_gadget_connect() is called. For example, user mode components may
- * need to be activated before the system can talk to hosts.
- *
- * Returns zero on success, else negative errno.
- */
+{ return 0; }
static inline int usb_gadget_disconnect(struct usb_gadget *gadget)
-{
- if (!gadget->ops->pullup)
- return -EOPNOTSUPP;
- return gadget->ops->pullup(gadget, 0);
-}
-
-int usb_gadget_poll(void);
+{ return 0; }
+static inline int usb_gadget_deactivate(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_activate(struct usb_gadget *gadget)
+{ return 0; }
+static inline int usb_gadget_check_config(struct usb_gadget *gadget)
+{ return 0; }
+#endif /* CONFIG_USB_GADGET */
/*-------------------------------------------------------------------------*/
/**
- * struct usb_gadget_driver - driver for usb 'slave' devices
+ * struct usb_gadget_driver - driver for usb gadget devices
* @function: String describing the gadget's function
* @max_speed: Highest speed the driver handles.
* @setup: Invoked for ep0 control requests that aren't handled by
@@ -822,7 +662,14 @@ int usb_gadget_poll(void);
* Called in a context that permits sleeping.
* @suspend: Invoked on USB suspend. May be called in_interrupt.
* @resume: Invoked on USB resume. May be called in_interrupt.
+ * @reset: Invoked on USB bus reset. It is mandatory for all gadget drivers
+ * and should be called in_interrupt.
* @driver: Driver model state for this driver.
+ * @udc_name: A name of UDC this driver should be bound to. If udc_name is
NULL,
+ * this driver will be bound to any available UDC.
+ * @match_existing_only: If udc is not found, return an error and fail
+ * the driver registration
+ * @is_bound: Allow a driver to be bound to only one gadget
*
* Devices are disabled till a gadget driver successfully bind()s, which
* means the driver will handle setup() requests needed to enumerate (and
@@ -879,9 +726,14 @@ struct usb_gadget_driver {
void (*disconnect)(struct usb_gadget *);
void (*suspend)(struct usb_gadget *);
void (*resume)(struct usb_gadget *);
+ void (*reset)(struct usb_gadget *);
/* FIXME support safe rmmod */
struct driver driver;
+
+ char *udc_name;
+ unsigned match_existing_only:1;
+ bool is_bound:1;
};
@@ -891,22 +743,23 @@ struct usb_gadget_driver {
/* driver modules register and unregister, as usual.
* these calls must be made in a context that can sleep.
*
- * these will usually be implemented directly by the hardware-dependent
- * usb bus interface driver, which will only support a single driver.
+ * A gadget driver can be bound to only one gadget at a time.
*/
/**
- * usb_gadget_probe_driver - probe a gadget driver
+ * usb_gadget_register_driver - register a gadget driver
* @driver: the driver being registered
* Context: can sleep
*
* Call this in your gadget driver's module initialization function,
- * to tell the underlying usb controller driver about your driver.
+ * to tell the underlying UDC controller driver about your driver.
* The @bind() function will be called to bind it to a gadget before this
* registration call returns. It's expected that the @bind() function will
* be in init sections.
+ *
+ * Use the macro defined below instead of calling this directly.
*/
-int usb_gadget_probe_driver(struct usb_gadget_driver *driver);
+int usb_gadget_register_driver(struct usb_gadget_driver *driver);
/**
* usb_gadget_unregister_driver - unregister a gadget driver
@@ -919,19 +772,10 @@ int usb_gadget_probe_driver(struct usb_gadget_driver
*driver);
* it will first disconnect(). The driver is also requested
* to unbind() and clean up any device state, before this procedure
* finally returns. It's expected that the unbind() functions
- * will in in exit sections, so may not be linked in some kernels.
+ * will be in exit sections, so may not be linked in some kernels.
*/
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver);
-extern int usb_add_gadget_udc_release(struct device *parent,
- struct usb_gadget *gadget,
- void (*release)(struct device *dev));
-extern int usb_add_gadget_udc(struct device *parent,
- struct usb_gadget *gadget);
-extern void usb_del_gadget_udc(struct usb_gadget *gadget);
-extern int udc_attach_driver(const char *name,
- struct usb_gadget_driver *driver);
-
/*-------------------------------------------------------------------------*/
/* utility to simplify dealing with string descriptors */
@@ -964,11 +808,23 @@ struct usb_gadget_strings {
struct usb_gadget_string_container {
struct list_head list;
- u8 *stash[0];
+ u8 *stash[];
};
/* put descriptor for string with that id into buf (buflen >= 256) */
-int usb_gadget_get_string(struct usb_gadget_strings *table, int id, u8 *buf);
+int usb_gadget_get_string(const struct usb_gadget_strings *table, int id, u8
*buf);
+
+/* check if the given language identifier is valid */
+bool usb_validate_langid(u16 langid);
+
+struct gadget_string {
+ struct list_head list;
+ char string[USB_MAX_STRING_LEN];
+ struct usb_string usb_string;
+};
+
+#define to_gadget_string(str_item)\
+container_of(str_item, struct gadget_string, item)
/*-------------------------------------------------------------------------*/
@@ -1002,6 +858,36 @@ int usb_assign_descriptors(struct usb_function *f,
struct usb_descriptor_header **ss);
void usb_free_all_descriptors(struct usb_function *f);
+struct usb_descriptor_header *usb_otg_descriptor_alloc(
+ struct usb_gadget *gadget);
+int usb_otg_descriptor_init(struct usb_gadget *gadget,
+ struct usb_descriptor_header *otg_desc);
+/*-------------------------------------------------------------------------*/
+
+/* utility to simplify map/unmap of usb_requests to/from DMA */
+
+#ifdef CONFIG_HAS_DMA
+extern int usb_gadget_map_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in);
+extern int usb_gadget_map_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in);
+
+extern void usb_gadget_unmap_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in);
+extern void usb_gadget_unmap_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in);
+#else /* !CONFIG_HAS_DMA */
+static inline int usb_gadget_map_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in) { return -ENOSYS; }
+static inline int usb_gadget_map_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in) { return -ENOSYS; }
+
+static inline void usb_gadget_unmap_request_by_dev(struct device *dev,
+ struct usb_request *req, int is_in) { }
+static inline void usb_gadget_unmap_request(struct usb_gadget *gadget,
+ struct usb_request *req, int is_in) { }
+#endif /* !CONFIG_HAS_DMA */
+
/*-------------------------------------------------------------------------*/
/* utility to set gadget state properly */
@@ -1013,7 +899,36 @@ extern void usb_gadget_set_state(struct usb_gadget
*gadget,
/* utility to tell udc core that the bus reset occurs */
extern void usb_gadget_udc_reset(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver);
+ struct usb_gadget_driver *driver);
+
+/*-------------------------------------------------------------------------*/
+
+/* utility to give requests back to the gadget layer */
+
+extern void usb_gadget_giveback_request(struct usb_ep *ep,
+ struct usb_request *req);
+
+/*-------------------------------------------------------------------------*/
+
+/* utility to find endpoint by name */
+
+extern struct usb_ep *gadget_find_ep_by_name(struct usb_gadget *g,
+ const char *name);
+
+/*-------------------------------------------------------------------------*/
+
+/* utility to check if endpoint caps match descriptor needs */
+
+extern int usb_gadget_ep_match_desc(struct usb_gadget *gadget,
+ struct usb_ep *ep, struct usb_endpoint_descriptor *desc,
+ struct usb_ss_ep_comp_descriptor *ep_comp);
+
+/*-------------------------------------------------------------------------*/
+
+/* utility to update vbus status for udc core, it may be scheduled */
+extern void usb_udc_vbus_handler(struct usb_gadget *gadget, bool status);
+
+/*-------------------------------------------------------------------------*/
/* utility wrapping a simple endpoint selection policy */
@@ -1025,6 +940,10 @@ extern struct usb_ep *usb_ep_autoconfig_ss(struct
usb_gadget *,
struct usb_endpoint_descriptor *,
struct usb_ss_ep_comp_descriptor *);
+extern void usb_ep_autoconfig_release(struct usb_ep *);
+
extern void usb_ep_autoconfig_reset(struct usb_gadget *);
+int usb_gadget_poll(void);
+
#endif /* __LINUX_USB_GADGET_H */
--
2.30.2
