Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
new file mode 100644
index 0000000..8ef8a9c
--- /dev/null
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -0,0 +1,1793 @@
+/*
+ * dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
+ *
+ * Maintainer: Alan Stern <stern@rowland.harvard.edu>
+ *
+ * Copyright (C) 2003 David Brownell
+ * Copyright (C) 2003-2005 Alan Stern
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+/*
+ * This exposes a device side "USB gadget" API, driven by requests to a
+ * Linux-USB host controller driver. USB traffic is simulated; there's
+ * no need for USB hardware. Use this with two other drivers:
+ *
+ * - Gadget driver, responding to requests (slave);
+ * - Host-side device driver, as already familiar in Linux.
+ *
+ * Having this all in one kernel can help some stages of development,
+ * bypassing some hardware (and driver) issues. UML could help too.
+ */
+
+#define DEBUG
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/version.h>
+
+#include <linux/usb.h>
+#include <linux/usb_gadget.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+
+
+#include "../core/hcd.h"
+
+
+#define DRIVER_DESC "USB Host+Gadget Emulator"
+#define DRIVER_VERSION "17 Dec 2004"
+
+static const char driver_name [] = "dummy_hcd";
+static const char driver_desc [] = "USB Host+Gadget Emulator";
+
+static const char gadget_name [] = "dummy_udc";
+
+MODULE_DESCRIPTION (DRIVER_DESC);
+MODULE_AUTHOR ("David Brownell");
+MODULE_LICENSE ("GPL");
+
+/*-------------------------------------------------------------------------*/
+
+/* gadget side driver data structres */
+struct dummy_ep {
+ struct list_head queue;
+ unsigned long last_io; /* jiffies timestamp */
+ struct usb_gadget *gadget;
+ const struct usb_endpoint_descriptor *desc;
+ struct usb_ep ep;
+ unsigned halted : 1;
+ unsigned already_seen : 1;
+ unsigned setup_stage : 1;
+};
+
+struct dummy_request {
+ struct list_head queue; /* ep's requests */
+ struct usb_request req;
+};
+
+static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
+{
+ return container_of (_ep, struct dummy_ep, ep);
+}
+
+static inline struct dummy_request *usb_request_to_dummy_request
+ (struct usb_request *_req)
+{
+ return container_of (_req, struct dummy_request, req);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Every device has ep0 for control requests, plus up to 30 more endpoints,
+ * in one of two types:
+ *
+ * - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
+ * number can be changed. Names like "ep-a" are used for this type.
+ *
+ * - Fixed Function: in other cases. some characteristics may be mutable;
+ * that'd be hardware-specific. Names like "ep12out-bulk" are used.
+ *
+ * Gadget drivers are responsible for not setting up conflicting endpoint
+ * configurations, illegal or unsupported packet lengths, and so on.
+ */
+
+static const char ep0name [] = "ep0";
+
+static const char *const ep_name [] = {
+ ep0name, /* everyone has ep0 */
+
+ /* act like a net2280: high speed, six configurable endpoints */
+ "ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
+
+ /* or like pxa250: fifteen fixed function endpoints */
+ "ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
+ "ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
+ "ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
+ "ep15in-int",
+
+ /* or like sa1100: two fixed function endpoints */
+ "ep1out-bulk", "ep2in-bulk",
+};
+#define DUMMY_ENDPOINTS (sizeof(ep_name)/sizeof(char *))
+
+#define FIFO_SIZE 64
+
+struct urbp {
+ struct urb *urb;
+ struct list_head urbp_list;
+};
+
+struct dummy {
+ spinlock_t lock;
+
+ /*
+ * SLAVE/GADGET side support
+ */
+ struct dummy_ep ep [DUMMY_ENDPOINTS];
+ int address;
+ struct usb_gadget gadget;
+ struct usb_gadget_driver *driver;
+ struct dummy_request fifo_req;
+ u8 fifo_buf [FIFO_SIZE];
+ u16 devstatus;
+
+ /*
+ * MASTER/HOST side support
+ */
+ struct timer_list timer;
+ u32 port_status;
+ unsigned resuming:1;
+ unsigned long re_timeout;
+
+ struct usb_device *udev;
+ struct list_head urbp_list;
+};
+
+static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd)
+{
+ return (struct dummy *) (hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum)
+{
+ return container_of((void *) dum, struct usb_hcd, hcd_priv);
+}
+
+static inline struct device *dummy_dev (struct dummy *dum)
+{
+ return dummy_to_hcd(dum)->self.controller;
+}
+
+static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
+{
+ return container_of (ep->gadget, struct dummy, gadget);
+}
+
+static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget)
+{
+ return container_of (gadget, struct dummy, gadget);
+}
+
+static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
+{
+ return container_of (dev, struct dummy, gadget.dev);
+}
+
+static struct dummy *the_controller;
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * This "hardware" may look a bit odd in diagnostics since it's got both
+ * host and device sides; and it binds different drivers to each side.
+ */
+static struct platform_device the_pdev;
+
+static struct device_driver dummy_driver = {
+ .name = (char *) driver_name,
+ .bus = &platform_bus_type,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* SLAVE/GADGET SIDE DRIVER
+ *
+ * This only tracks gadget state. All the work is done when the host
+ * side tries some (emulated) i/o operation. Real device controller
+ * drivers would do real i/o using dma, fifos, irqs, timers, etc.
+ */
+
+#define is_enabled(dum) \
+ (dum->port_status & USB_PORT_STAT_ENABLE)
+
+static int
+dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
+{
+ struct dummy *dum;
+ struct dummy_ep *ep;
+ unsigned max;
+ int retval;
+
+ ep = usb_ep_to_dummy_ep (_ep);
+ if (!_ep || !desc || ep->desc || _ep->name == ep0name
+ || desc->bDescriptorType != USB_DT_ENDPOINT)
+ return -EINVAL;
+ dum = ep_to_dummy (ep);
+ if (!dum->driver || !is_enabled (dum))
+ return -ESHUTDOWN;
+ max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff;
+
+ /* drivers must not request bad settings, since lower levels
+ * (hardware or its drivers) may not check. some endpoints
+ * can't do iso, many have maxpacket limitations, etc.
+ *
+ * since this "hardware" driver is here to help debugging, we
+ * have some extra sanity checks. (there could be more though,
+ * especially for "ep9out" style fixed function ones.)
+ */
+ retval = -EINVAL;
+ switch (desc->bmAttributes & 0x03) {
+ case USB_ENDPOINT_XFER_BULK:
+ if (strstr (ep->ep.name, "-iso")
+ || strstr (ep->ep.name, "-int")) {
+ goto done;
+ }
+ switch (dum->gadget.speed) {
+ case USB_SPEED_HIGH:
+ if (max == 512)
+ break;
+ /* conserve return statements */
+ default:
+ switch (max) {
+ case 8: case 16: case 32: case 64:
+ /* we'll fake any legal size */
+ break;
+ default:
+ case USB_SPEED_LOW:
+ goto done;
+ }
+ }
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
+ goto done;
+ /* real hardware might not handle all packet sizes */
+ switch (dum->gadget.speed) {
+ case USB_SPEED_HIGH:
+ if (max <= 1024)
+ break;
+ /* save a return statement */
+ case USB_SPEED_FULL:
+ if (max <= 64)
+ break;
+ /* save a return statement */
+ default:
+ if (max <= 8)
+ break;
+ goto done;
+ }
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ if (strstr (ep->ep.name, "-bulk")
+ || strstr (ep->ep.name, "-int"))
+ goto done;
+ /* real hardware might not handle all packet sizes */
+ switch (dum->gadget.speed) {
+ case USB_SPEED_HIGH:
+ if (max <= 1024)
+ break;
+ /* save a return statement */
+ case USB_SPEED_FULL:
+ if (max <= 1023)
+ break;
+ /* save a return statement */
+ default:
+ goto done;
+ }
+ break;
+ default:
+ /* few chips support control except on ep0 */
+ goto done;
+ }
+
+ _ep->maxpacket = max;
+ ep->desc = desc;
+
+ dev_dbg (dummy_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
+ _ep->name,
+ desc->bEndpointAddress & 0x0f,
+ (desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
+ ({ char *val;
+ switch (desc->bmAttributes & 0x03) {
+ case USB_ENDPOINT_XFER_BULK: val = "bulk"; break;
+ case USB_ENDPOINT_XFER_ISOC: val = "iso"; break;
+ case USB_ENDPOINT_XFER_INT: val = "intr"; break;
+ default: val = "ctrl"; break;
+ }; val; }),
+ max);
+
+ /* at this point real hardware should be NAKing transfers
+ * to that endpoint, until a buffer is queued to it.
+ */
+ retval = 0;
+done:
+ return retval;
+}
+
+/* called with spinlock held */
+static void nuke (struct dummy *dum, struct dummy_ep *ep)
+{
+ while (!list_empty (&ep->queue)) {
+ struct dummy_request *req;
+
+ req = list_entry (ep->queue.next, struct dummy_request, queue);
+ list_del_init (&req->queue);
+ req->req.status = -ESHUTDOWN;
+
+ spin_unlock (&dum->lock);
+ req->req.complete (&ep->ep, &req->req);
+ spin_lock (&dum->lock);
+ }
+}
+
+static int dummy_disable (struct usb_ep *_ep)
+{
+ struct dummy_ep *ep;
+ struct dummy *dum;
+ unsigned long flags;
+ int retval;
+
+ ep = usb_ep_to_dummy_ep (_ep);
+ if (!_ep || !ep->desc || _ep->name == ep0name)
+ return -EINVAL;
+ dum = ep_to_dummy (ep);
+
+ spin_lock_irqsave (&dum->lock, flags);
+ ep->desc = NULL;
+ retval = 0;
+ nuke (dum, ep);
+ spin_unlock_irqrestore (&dum->lock, flags);
+
+ dev_dbg (dummy_dev(dum), "disabled %s\n", _ep->name);
+ return retval;
+}
+
+static struct usb_request *
+dummy_alloc_request (struct usb_ep *_ep, int mem_flags)
+{
+ struct dummy_ep *ep;
+ struct dummy_request *req;
+
+ if (!_ep)
+ return NULL;
+ ep = usb_ep_to_dummy_ep (_ep);
+
+ req = kmalloc (sizeof *req, mem_flags);
+ if (!req)
+ return NULL;
+ memset (req, 0, sizeof *req);
+ INIT_LIST_HEAD (&req->queue);
+ return &req->req;
+}
+
+static void
+dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct dummy_ep *ep;
+ struct dummy_request *req;
+
+ ep = usb_ep_to_dummy_ep (_ep);
+ if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
+ return;
+
+ req = usb_request_to_dummy_request (_req);
+ WARN_ON (!list_empty (&req->queue));
+ kfree (req);
+}
+
+static void *
+dummy_alloc_buffer (
+ struct usb_ep *_ep,
+ unsigned bytes,
+ dma_addr_t *dma,
+ int mem_flags
+) {
+ char *retval;
+ struct dummy_ep *ep;
+ struct dummy *dum;
+
+ ep = usb_ep_to_dummy_ep (_ep);
+ dum = ep_to_dummy (ep);
+
+ if (!dum->driver)
+ return NULL;
+ retval = kmalloc (bytes, mem_flags);
+ *dma = (dma_addr_t) retval;
+ return retval;
+}
+
+static void
+dummy_free_buffer (
+ struct usb_ep *_ep,
+ void *buf,
+ dma_addr_t dma,
+ unsigned bytes
+) {
+ if (bytes)
+ kfree (buf);
+}
+
+static void
+fifo_complete (struct usb_ep *ep, struct usb_request *req)
+{
+}
+
+static int
+dummy_queue (struct usb_ep *_ep, struct usb_request *_req, int mem_flags)
+{
+ struct dummy_ep *ep;
+ struct dummy_request *req;
+ struct dummy *dum;
+ unsigned long flags;
+
+ req = usb_request_to_dummy_request (_req);
+ if (!_req || !list_empty (&req->queue) || !_req->complete)
+ return -EINVAL;
+
+ ep = usb_ep_to_dummy_ep (_ep);
+ if (!_ep || (!ep->desc && _ep->name != ep0name))
+ return -EINVAL;
+
+ dum = ep_to_dummy (ep);
+ if (!dum->driver || !is_enabled (dum))
+ return -ESHUTDOWN;
+
+#if 0
+ dev_dbg (dummy_dev(dum), "ep %p queue req %p to %s, len %d buf %p\n",
+ ep, _req, _ep->name, _req->length, _req->buf);
+#endif
+
+ _req->status = -EINPROGRESS;
+ _req->actual = 0;
+ spin_lock_irqsave (&dum->lock, flags);
+
+ /* implement an emulated single-request FIFO */
+ if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
+ list_empty (&dum->fifo_req.queue) &&
+ list_empty (&ep->queue) &&
+ _req->length <= FIFO_SIZE) {
+ req = &dum->fifo_req;
+ req->req = *_req;
+ req->req.buf = dum->fifo_buf;
+ memcpy (dum->fifo_buf, _req->buf, _req->length);
+ req->req.context = dum;
+ req->req.complete = fifo_complete;
+
+ spin_unlock (&dum->lock);
+ _req->actual = _req->length;
+ _req->status = 0;
+ _req->complete (_ep, _req);
+ spin_lock (&dum->lock);
+ }
+ list_add_tail (&req->queue, &ep->queue);
+ spin_unlock_irqrestore (&dum->lock, flags);
+
+ /* real hardware would likely enable transfers here, in case
+ * it'd been left NAKing.
+ */
+ return 0;
+}
+
+static int dummy_dequeue (struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct dummy_ep *ep;
+ struct dummy *dum;
+ int retval = -EINVAL;
+ unsigned long flags;
+ struct dummy_request *req = NULL;
+
+ if (!_ep || !_req)
+ return retval;
+ ep = usb_ep_to_dummy_ep (_ep);
+ dum = ep_to_dummy (ep);
+
+ if (!dum->driver)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave (&dum->lock, flags);
+ list_for_each_entry (req, &ep->queue, queue) {
+ if (&req->req == _req) {
+ list_del_init (&req->queue);
+ _req->status = -ECONNRESET;
+ retval = 0;
+ break;
+ }
+ }
+ spin_unlock_irqrestore (&dum->lock, flags);
+
+ if (retval == 0) {
+ dev_dbg (dummy_dev(dum),
+ "dequeued req %p from %s, len %d buf %p\n",
+ req, _ep->name, _req->length, _req->buf);
+ _req->complete (_ep, _req);
+ }
+ return retval;
+}
+
+static int
+dummy_set_halt (struct usb_ep *_ep, int value)
+{
+ struct dummy_ep *ep;
+ struct dummy *dum;
+
+ if (!_ep)
+ return -EINVAL;
+ ep = usb_ep_to_dummy_ep (_ep);
+ dum = ep_to_dummy (ep);
+ if (!dum->driver)
+ return -ESHUTDOWN;
+ if (!value)
+ ep->halted = 0;
+ else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
+ !list_empty (&ep->queue))
+ return -EAGAIN;
+ else
+ ep->halted = 1;
+ /* FIXME clear emulated data toggle too */
+ return 0;
+}
+
+static const struct usb_ep_ops dummy_ep_ops = {
+ .enable = dummy_enable,
+ .disable = dummy_disable,
+
+ .alloc_request = dummy_alloc_request,
+ .free_request = dummy_free_request,
+
+ .alloc_buffer = dummy_alloc_buffer,
+ .free_buffer = dummy_free_buffer,
+ /* map, unmap, ... eventually hook the "generic" dma calls */
+
+ .queue = dummy_queue,
+ .dequeue = dummy_dequeue,
+
+ .set_halt = dummy_set_halt,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* there are both host and device side versions of this call ... */
+static int dummy_g_get_frame (struct usb_gadget *_gadget)
+{
+ struct timeval tv;
+
+ do_gettimeofday (&tv);
+ return tv.tv_usec / 1000;
+}
+
+static int dummy_wakeup (struct usb_gadget *_gadget)
+{
+ struct dummy *dum;
+
+ dum = gadget_to_dummy (_gadget);
+ if ((dum->devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP)) == 0
+ || !(dum->port_status & (1 << USB_PORT_FEAT_SUSPEND)))
+ return -EINVAL;
+
+ /* hub notices our request, issues downstream resume, etc */
+ dum->resuming = 1;
+ dum->port_status |= (1 << USB_PORT_FEAT_C_SUSPEND);
+ return 0;
+}
+
+static int dummy_set_selfpowered (struct usb_gadget *_gadget, int value)
+{
+ struct dummy *dum;
+
+ dum = gadget_to_dummy (_gadget);
+ if (value)
+ dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
+ else
+ dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
+ return 0;
+}
+
+static const struct usb_gadget_ops dummy_ops = {
+ .get_frame = dummy_g_get_frame,
+ .wakeup = dummy_wakeup,
+ .set_selfpowered = dummy_set_selfpowered,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* "function" sysfs attribute */
+static ssize_t
+show_function (struct device *dev, char *buf)
+{
+ struct dummy *dum = gadget_dev_to_dummy (dev);
+
+ if (!dum->driver || !dum->driver->function)
+ return 0;
+ return scnprintf (buf, PAGE_SIZE, "%s\n", dum->driver->function);
+}
+DEVICE_ATTR (function, S_IRUGO, show_function, NULL);
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Driver registration/unregistration.
+ *
+ * This is basically hardware-specific; there's usually only one real USB
+ * device (not host) controller since that's how USB devices are intended
+ * to work. So most implementations of these api calls will rely on the
+ * fact that only one driver will ever bind to the hardware. But curious
+ * hardware can be built with discrete components, so the gadget API doesn't
+ * require that assumption.
+ *
+ * For this emulator, it might be convenient to create a usb slave device
+ * for each driver that registers: just add to a big root hub.
+ */
+
+static void
+dummy_udc_release (struct device *dev)
+{
+}
+
+static void
+dummy_pdev_release (struct device *dev)
+{
+}
+
+static int
+dummy_register_udc (struct dummy *dum)
+{
+ int rc;
+
+ strcpy (dum->gadget.dev.bus_id, "udc");
+ dum->gadget.dev.parent = dummy_dev(dum);
+ dum->gadget.dev.release = dummy_udc_release;
+
+ rc = device_register (&dum->gadget.dev);
+ if (rc == 0)
+ device_create_file (&dum->gadget.dev, &dev_attr_function);
+ return rc;
+}
+
+static void
+dummy_unregister_udc (struct dummy *dum)
+{
+ device_remove_file (&dum->gadget.dev, &dev_attr_function);
+ device_unregister (&dum->gadget.dev);
+}
+
+int
+usb_gadget_register_driver (struct usb_gadget_driver *driver)
+{
+ struct dummy *dum = the_controller;
+ int retval, i;
+
+ if (!dum)
+ return -EINVAL;
+ if (dum->driver)
+ return -EBUSY;
+ if (!driver->bind || !driver->unbind || !driver->setup
+ || driver->speed == USB_SPEED_UNKNOWN)
+ return -EINVAL;
+
+ /*
+ * SLAVE side init ... the layer above hardware, which
+ * can't enumerate without help from the driver we're binding.
+ */
+ dum->gadget.name = gadget_name;
+ dum->gadget.ops = &dummy_ops;
+ dum->gadget.is_dualspeed = 1;
+
+ dum->devstatus = 0;
+ dum->resuming = 0;
+
+ INIT_LIST_HEAD (&dum->gadget.ep_list);
+ for (i = 0; i < DUMMY_ENDPOINTS; i++) {
+ struct dummy_ep *ep = &dum->ep [i];
+
+ if (!ep_name [i])
+ break;
+ ep->ep.name = ep_name [i];
+ ep->ep.ops = &dummy_ep_ops;
+ list_add_tail (&ep->ep.ep_list, &dum->gadget.ep_list);
+ ep->halted = ep->already_seen = ep->setup_stage = 0;
+ ep->ep.maxpacket = ~0;
+ ep->last_io = jiffies;
+ ep->gadget = &dum->gadget;
+ ep->desc = NULL;
+ INIT_LIST_HEAD (&ep->queue);
+ }
+
+ dum->gadget.ep0 = &dum->ep [0].ep;
+ dum->ep [0].ep.maxpacket = 64;
+ list_del_init (&dum->ep [0].ep.ep_list);
+ INIT_LIST_HEAD(&dum->fifo_req.queue);
+
+ dum->driver = driver;
+ dum->gadget.dev.driver = &driver->driver;
+ dev_dbg (dummy_dev(dum), "binding gadget driver '%s'\n",
+ driver->driver.name);
+ if ((retval = driver->bind (&dum->gadget)) != 0) {
+ dum->driver = NULL;
+ dum->gadget.dev.driver = NULL;
+ return retval;
+ }
+
+ // FIXME: Check these calls for errors and re-order
+ driver->driver.bus = dum->gadget.dev.parent->bus;
+ driver_register (&driver->driver);
+
+ device_bind_driver (&dum->gadget.dev);
+
+ /* khubd will enumerate this in a while */
+ dum->port_status |= USB_PORT_STAT_CONNECTION
+ | (1 << USB_PORT_FEAT_C_CONNECTION);
+ return 0;
+}
+EXPORT_SYMBOL (usb_gadget_register_driver);
+
+/* caller must hold lock */
+static void
+stop_activity (struct dummy *dum, struct usb_gadget_driver *driver)
+{
+ struct dummy_ep *ep;
+
+ /* prevent any more requests */
+ dum->address = 0;
+
+ /* The timer is left running so that outstanding URBs can fail */
+
+ /* nuke any pending requests first, so driver i/o is quiesced */
+ list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
+ nuke (dum, ep);
+
+ /* driver now does any non-usb quiescing necessary */
+ if (driver) {
+ spin_unlock (&dum->lock);
+ driver->disconnect (&dum->gadget);
+ spin_lock (&dum->lock);
+ }
+}
+
+int
+usb_gadget_unregister_driver (struct usb_gadget_driver *driver)
+{
+ struct dummy *dum = the_controller;
+ unsigned long flags;
+
+ if (!dum)
+ return -ENODEV;
+ if (!driver || driver != dum->driver)
+ return -EINVAL;
+
+ dev_dbg (dummy_dev(dum), "unregister gadget driver '%s'\n",
+ driver->driver.name);
+
+ spin_lock_irqsave (&dum->lock, flags);
+ stop_activity (dum, driver);
+ dum->port_status &= ~(USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE |
+ USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED);
+ dum->port_status |= (1 << USB_PORT_FEAT_C_CONNECTION);
+ spin_unlock_irqrestore (&dum->lock, flags);
+
+ driver->unbind (&dum->gadget);
+ dum->driver = NULL;
+
+ device_release_driver (&dum->gadget.dev);
+
+ driver_unregister (&driver->driver);
+
+ return 0;
+}
+EXPORT_SYMBOL (usb_gadget_unregister_driver);
+
+#undef is_enabled
+
+int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
+{
+ return -ENOSYS;
+}
+EXPORT_SYMBOL (net2280_set_fifo_mode);
+
+/*-------------------------------------------------------------------------*/
+
+/* MASTER/HOST SIDE DRIVER
+ *
+ * this uses the hcd framework to hook up to host side drivers.
+ * its root hub will only have one device, otherwise it acts like
+ * a normal host controller.
+ *
+ * when urbs are queued, they're just stuck on a list that we
+ * scan in a timer callback. that callback connects writes from
+ * the host with reads from the device, and so on, based on the
+ * usb 2.0 rules.
+ */
+
+static int dummy_urb_enqueue (
+ struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep,
+ struct urb *urb,
+ int mem_flags
+) {
+ struct dummy *dum;
+ struct urbp *urbp;
+ unsigned long flags;
+
+ if (!urb->transfer_buffer && urb->transfer_buffer_length)
+ return -EINVAL;
+
+ urbp = kmalloc (sizeof *urbp, mem_flags);
+ if (!urbp)
+ return -ENOMEM;
+ urbp->urb = urb;
+
+ dum = hcd_to_dummy (hcd);
+ spin_lock_irqsave (&dum->lock, flags);
+
+ if (!dum->udev) {
+ dum->udev = urb->dev;
+ usb_get_dev (dum->udev);
+ } else if (unlikely (dum->udev != urb->dev))
+ dev_err (dummy_dev(dum), "usb_device address has changed!\n");
+
+ list_add_tail (&urbp->urbp_list, &dum->urbp_list);
+ urb->hcpriv = urbp;
+ if (usb_pipetype (urb->pipe) == PIPE_CONTROL)
+ urb->error_count = 1; /* mark as a new urb */
+
+ /* kick the scheduler, it'll do the rest */
+ if (!timer_pending (&dum->timer))
+ mod_timer (&dum->timer, jiffies + 1);
+
+ spin_unlock_irqrestore (&dum->lock, flags);
+ return 0;
+}
+
+static int dummy_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
+{
+ /* giveback happens automatically in timer callback */
+ return 0;
+}
+
+static void maybe_set_status (struct urb *urb, int status)
+{
+ spin_lock (&urb->lock);
+ if (urb->status == -EINPROGRESS)
+ urb->status = status;
+ spin_unlock (&urb->lock);
+}
+
+/* transfer up to a frame's worth; caller must own lock */
+static int
+transfer (struct dummy *dum, struct urb *urb, struct dummy_ep *ep, int limit)
+{
+ struct dummy_request *req;
+
+top:
+ /* if there's no request queued, the device is NAKing; return */
+ list_for_each_entry (req, &ep->queue, queue) {
+ unsigned host_len, dev_len, len;
+ int is_short, to_host;
+ int rescan = 0;
+
+ /* 1..N packets of ep->ep.maxpacket each ... the last one
+ * may be short (including zero length).
+ *
+ * writer can send a zlp explicitly (length 0) or implicitly
+ * (length mod maxpacket zero, and 'zero' flag); they always
+ * terminate reads.
+ */
+ host_len = urb->transfer_buffer_length - urb->actual_length;
+ dev_len = req->req.length - req->req.actual;
+ len = min (host_len, dev_len);
+
+ /* FIXME update emulated data toggle too */
+
+ to_host = usb_pipein (urb->pipe);
+ if (unlikely (len == 0))
+ is_short = 1;
+ else {
+ char *ubuf, *rbuf;
+
+ /* not enough bandwidth left? */
+ if (limit < ep->ep.maxpacket && limit < len)
+ break;
+ len = min (len, (unsigned) limit);
+ if (len == 0)
+ break;
+
+ /* use an extra pass for the final short packet */
+ if (len > ep->ep.maxpacket) {
+ rescan = 1;
+ len -= (len % ep->ep.maxpacket);
+ }
+ is_short = (len % ep->ep.maxpacket) != 0;
+
+ /* else transfer packet(s) */
+ ubuf = urb->transfer_buffer + urb->actual_length;
+ rbuf = req->req.buf + req->req.actual;
+ if (to_host)
+ memcpy (ubuf, rbuf, len);
+ else
+ memcpy (rbuf, ubuf, len);
+ ep->last_io = jiffies;
+
+ limit -= len;
+ urb->actual_length += len;
+ req->req.actual += len;
+ }
+
+ /* short packets terminate, maybe with overflow/underflow.
+ * it's only really an error to write too much.
+ *
+ * partially filling a buffer optionally blocks queue advances
+ * (so completion handlers can clean up the queue) but we don't
+ * need to emulate such data-in-flight. so we only show part
+ * of the URB_SHORT_NOT_OK effect: completion status.
+ */
+ if (is_short) {
+ if (host_len == dev_len) {
+ req->req.status = 0;
+ maybe_set_status (urb, 0);
+ } else if (to_host) {
+ req->req.status = 0;
+ if (dev_len > host_len)
+ maybe_set_status (urb, -EOVERFLOW);
+ else
+ maybe_set_status (urb,
+ (urb->transfer_flags
+ & URB_SHORT_NOT_OK)
+ ? -EREMOTEIO : 0);
+ } else if (!to_host) {
+ maybe_set_status (urb, 0);
+ if (host_len > dev_len)
+ req->req.status = -EOVERFLOW;
+ else
+ req->req.status = 0;
+ }
+
+ /* many requests terminate without a short packet */
+ } else {
+ if (req->req.length == req->req.actual
+ && !req->req.zero)
+ req->req.status = 0;
+ if (urb->transfer_buffer_length == urb->actual_length
+ && !(urb->transfer_flags
+ & URB_ZERO_PACKET)) {
+ maybe_set_status (urb, 0);
+ }
+ }
+
+ /* device side completion --> continuable */
+ if (req->req.status != -EINPROGRESS) {
+ list_del_init (&req->queue);
+
+ spin_unlock (&dum->lock);
+ req->req.complete (&ep->ep, &req->req);
+ spin_lock (&dum->lock);
+
+ /* requests might have been unlinked... */
+ rescan = 1;
+ }
+
+ /* host side completion --> terminate */
+ if (urb->status != -EINPROGRESS)
+ break;
+
+ /* rescan to continue with any other queued i/o */
+ if (rescan)
+ goto top;
+ }
+ return limit;
+}
+
+static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
+{
+ int limit = ep->ep.maxpacket;
+
+ if (dum->gadget.speed == USB_SPEED_HIGH) {
+ int tmp;
+
+ /* high bandwidth mode */
+ tmp = le16_to_cpu(ep->desc->wMaxPacketSize);
+ tmp = le16_to_cpu (tmp);
+ tmp = (tmp >> 11) & 0x03;
+ tmp *= 8 /* applies to entire frame */;
+ limit += limit * tmp;
+ }
+ return limit;
+}
+
+#define is_active(dum) ((dum->port_status & \
+ (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE | \
+ USB_PORT_STAT_SUSPEND)) \
+ == (USB_PORT_STAT_CONNECTION | USB_PORT_STAT_ENABLE))
+
+static struct dummy_ep *find_endpoint (struct dummy *dum, u8 address)
+{
+ int i;
+
+ if (!is_active (dum))
+ return NULL;
+ if ((address & ~USB_DIR_IN) == 0)
+ return &dum->ep [0];
+ for (i = 1; i < DUMMY_ENDPOINTS; i++) {
+ struct dummy_ep *ep = &dum->ep [i];
+
+ if (!ep->desc)
+ continue;
+ if (ep->desc->bEndpointAddress == address)
+ return ep;
+ }
+ return NULL;
+}
+
+#undef is_active
+
+#define Dev_Request (USB_TYPE_STANDARD | USB_RECIP_DEVICE)
+#define Dev_InRequest (Dev_Request | USB_DIR_IN)
+#define Intf_Request (USB_TYPE_STANDARD | USB_RECIP_INTERFACE)
+#define Intf_InRequest (Intf_Request | USB_DIR_IN)
+#define Ep_Request (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT)
+#define Ep_InRequest (Ep_Request | USB_DIR_IN)
+
+/* drive both sides of the transfers; looks like irq handlers to
+ * both drivers except the callbacks aren't in_irq().
+ */
+static void dummy_timer (unsigned long _dum)
+{
+ struct dummy *dum = (struct dummy *) _dum;
+ struct urbp *urbp, *tmp;
+ unsigned long flags;
+ int limit, total;
+ int i;
+
+ /* simplistic model for one frame's bandwidth */
+ switch (dum->gadget.speed) {
+ case USB_SPEED_LOW:
+ total = 8/*bytes*/ * 12/*packets*/;
+ break;
+ case USB_SPEED_FULL:
+ total = 64/*bytes*/ * 19/*packets*/;
+ break;
+ case USB_SPEED_HIGH:
+ total = 512/*bytes*/ * 13/*packets*/ * 8/*uframes*/;
+ break;
+ default:
+ dev_err (dummy_dev(dum), "bogus device speed\n");
+ return;
+ }
+
+ /* FIXME if HZ != 1000 this will probably misbehave ... */
+
+ /* look at each urb queued by the host side driver */
+ spin_lock_irqsave (&dum->lock, flags);
+
+ if (!dum->udev) {
+ dev_err (dummy_dev(dum),
+ "timer fired with no URBs pending?\n");
+ spin_unlock_irqrestore (&dum->lock, flags);
+ return;
+ }
+
+ for (i = 0; i < DUMMY_ENDPOINTS; i++) {
+ if (!ep_name [i])
+ break;
+ dum->ep [i].already_seen = 0;
+ }
+
+restart:
+ list_for_each_entry_safe (urbp, tmp, &dum->urbp_list, urbp_list) {
+ struct urb *urb;
+ struct dummy_request *req;
+ u8 address;
+ struct dummy_ep *ep = NULL;
+ int type;
+
+ urb = urbp->urb;
+ if (urb->status != -EINPROGRESS) {
+ /* likely it was just unlinked */
+ goto return_urb;
+ }
+ type = usb_pipetype (urb->pipe);
+
+ /* used up this frame's non-periodic bandwidth?
+ * FIXME there's infinite bandwidth for control and
+ * periodic transfers ... unrealistic.
+ */
+ if (total <= 0 && type == PIPE_BULK)
+ continue;
+
+ /* find the gadget's ep for this request (if configured) */
+ address = usb_pipeendpoint (urb->pipe);
+ if (usb_pipein (urb->pipe))
+ address |= USB_DIR_IN;
+ ep = find_endpoint(dum, address);
+ if (!ep) {
+ /* set_configuration() disagreement */
+ dev_dbg (dummy_dev(dum),
+ "no ep configured for urb %p\n",
+ urb);
+ maybe_set_status (urb, -EPROTO);
+ goto return_urb;
+ }
+
+ if (ep->already_seen)
+ continue;
+ ep->already_seen = 1;
+ if (ep == &dum->ep [0] && urb->error_count) {
+ ep->setup_stage = 1; /* a new urb */
+ urb->error_count = 0;
+ }
+ if (ep->halted && !ep->setup_stage) {
+ /* NOTE: must not be iso! */
+ dev_dbg (dummy_dev(dum), "ep %s halted, urb %p\n",
+ ep->ep.name, urb);
+ maybe_set_status (urb, -EPIPE);
+ goto return_urb;
+ }
+ /* FIXME make sure both ends agree on maxpacket */
+
+ /* handle control requests */
+ if (ep == &dum->ep [0] && ep->setup_stage) {
+ struct usb_ctrlrequest setup;
+ int value = 1;
+ struct dummy_ep *ep2;
+
+ setup = *(struct usb_ctrlrequest*) urb->setup_packet;
+ le16_to_cpus (&setup.wIndex);
+ le16_to_cpus (&setup.wValue);
+ le16_to_cpus (&setup.wLength);
+ if (setup.wLength != urb->transfer_buffer_length) {
+ maybe_set_status (urb, -EOVERFLOW);
+ goto return_urb;
+ }
+
+ /* paranoia, in case of stale queued data */
+ list_for_each_entry (req, &ep->queue, queue) {
+ list_del_init (&req->queue);
+ req->req.status = -EOVERFLOW;
+ dev_dbg (dummy_dev(dum), "stale req = %p\n",
+ req);
+
+ spin_unlock (&dum->lock);
+ req->req.complete (&ep->ep, &req->req);
+ spin_lock (&dum->lock);
+ ep->already_seen = 0;
+ goto restart;
+ }
+
+ /* gadget driver never sees set_address or operations
+ * on standard feature flags. some hardware doesn't
+ * even expose them.
+ */
+ ep->last_io = jiffies;
+ ep->setup_stage = 0;
+ ep->halted = 0;
+ switch (setup.bRequest) {
+ case USB_REQ_SET_ADDRESS:
+ if (setup.bRequestType != Dev_Request)
+ break;
+ dum->address = setup.wValue;
+ maybe_set_status (urb, 0);
+ dev_dbg (dummy_dev(dum), "set_address = %d\n",
+ setup.wValue);
+ value = 0;
+ break;
+ case USB_REQ_SET_FEATURE:
+ if (setup.bRequestType == Dev_Request) {
+ value = 0;
+ switch (setup.wValue) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ break;
+ default:
+ value = -EOPNOTSUPP;
+ }
+ if (value == 0) {
+ dum->devstatus |=
+ (1 << setup.wValue);
+ maybe_set_status (urb, 0);
+ }
+
+ } else if (setup.bRequestType == Ep_Request) {
+ // endpoint halt
+ ep2 = find_endpoint (dum,
+ setup.wIndex);
+ if (!ep2) {
+ value = -EOPNOTSUPP;
+ break;
+ }
+ ep2->halted = 1;
+ value = 0;
+ maybe_set_status (urb, 0);
+ }
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ if (setup.bRequestType == Dev_Request) {
+ switch (setup.wValue) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ dum->devstatus &= ~(1 <<
+ USB_DEVICE_REMOTE_WAKEUP);
+ value = 0;
+ maybe_set_status (urb, 0);
+ break;
+ default:
+ value = -EOPNOTSUPP;
+ break;
+ }
+ } else if (setup.bRequestType == Ep_Request) {
+ // endpoint halt
+ ep2 = find_endpoint (dum,
+ setup.wIndex);
+ if (!ep2) {
+ value = -EOPNOTSUPP;
+ break;
+ }
+ ep2->halted = 0;
+ value = 0;
+ maybe_set_status (urb, 0);
+ }
+ break;
+ case USB_REQ_GET_STATUS:
+ if (setup.bRequestType == Dev_InRequest
+ || setup.bRequestType
+ == Intf_InRequest
+ || setup.bRequestType
+ == Ep_InRequest
+ ) {
+ char *buf;
+
+ // device: remote wakeup, selfpowered
+ // interface: nothing
+ // endpoint: halt
+ buf = (char *)urb->transfer_buffer;
+ if (urb->transfer_buffer_length > 0) {
+ if (setup.bRequestType ==
+ Ep_InRequest) {
+ ep2 = find_endpoint (dum, setup.wIndex);
+ if (!ep2) {
+ value = -EOPNOTSUPP;
+ break;
+ }
+ buf [0] = ep2->halted;
+ } else if (setup.bRequestType ==
+ Dev_InRequest) {
+ buf [0] = (u8)
+ dum->devstatus;
+ } else
+ buf [0] = 0;
+ }
+ if (urb->transfer_buffer_length > 1)
+ buf [1] = 0;
+ urb->actual_length = min (2,
+ urb->transfer_buffer_length);
+ value = 0;
+ maybe_set_status (urb, 0);
+ }
+ break;
+ }
+
+ /* gadget driver handles all other requests. block
+ * until setup() returns; no reentrancy issues etc.
+ */
+ if (value > 0) {
+ spin_unlock (&dum->lock);
+ value = dum->driver->setup (&dum->gadget,
+ &setup);
+ spin_lock (&dum->lock);
+
+ if (value >= 0) {
+ /* no delays (max 64KB data stage) */
+ limit = 64*1024;
+ goto treat_control_like_bulk;
+ }
+ /* error, see below */
+ }
+
+ if (value < 0) {
+ if (value != -EOPNOTSUPP)
+ dev_dbg (dummy_dev(dum),
+ "setup --> %d\n",
+ value);
+ maybe_set_status (urb, -EPIPE);
+ urb->actual_length = 0;
+ }
+
+ goto return_urb;
+ }
+
+ /* non-control requests */
+ limit = total;
+ switch (usb_pipetype (urb->pipe)) {
+ case PIPE_ISOCHRONOUS:
+ /* FIXME is it urb->interval since the last xfer?
+ * use urb->iso_frame_desc[i].
+ * complete whether or not ep has requests queued.
+ * report random errors, to debug drivers.
+ */
+ limit = max (limit, periodic_bytes (dum, ep));
+ maybe_set_status (urb, -ENOSYS);
+ break;
+
+ case PIPE_INTERRUPT:
+ /* FIXME is it urb->interval since the last xfer?
+ * this almost certainly polls too fast.
+ */
+ limit = max (limit, periodic_bytes (dum, ep));
+ /* FALLTHROUGH */
+
+ // case PIPE_BULK: case PIPE_CONTROL:
+ default:
+ treat_control_like_bulk:
+ ep->last_io = jiffies;
+ total = transfer (dum, urb, ep, limit);
+ break;
+ }
+
+ /* incomplete transfer? */
+ if (urb->status == -EINPROGRESS)
+ continue;
+
+return_urb:
+ urb->hcpriv = NULL;
+ list_del (&urbp->urbp_list);
+ kfree (urbp);
+ if (ep)
+ ep->already_seen = ep->setup_stage = 0;
+
+ spin_unlock (&dum->lock);
+ usb_hcd_giveback_urb (dummy_to_hcd(dum), urb, NULL);
+ spin_lock (&dum->lock);
+
+ goto restart;
+ }
+
+ /* want a 1 msec delay here */
+ if (!list_empty (&dum->urbp_list))
+ mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1));
+ else {
+ usb_put_dev (dum->udev);
+ dum->udev = NULL;
+ }
+
+ spin_unlock_irqrestore (&dum->lock, flags);
+}
+
+/*-------------------------------------------------------------------------*/
+
+#define PORT_C_MASK \
+ ((1 << USB_PORT_FEAT_C_CONNECTION) \
+ | (1 << USB_PORT_FEAT_C_ENABLE) \
+ | (1 << USB_PORT_FEAT_C_SUSPEND) \
+ | (1 << USB_PORT_FEAT_C_OVER_CURRENT) \
+ | (1 << USB_PORT_FEAT_C_RESET))
+
+static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
+{
+ struct dummy *dum;
+ unsigned long flags;
+ int retval;
+
+ dum = hcd_to_dummy (hcd);
+
+ spin_lock_irqsave (&dum->lock, flags);
+ if (!(dum->port_status & PORT_C_MASK))
+ retval = 0;
+ else {
+ *buf = (1 << 1);
+ dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n",
+ dum->port_status);
+ retval = 1;
+ }
+ spin_unlock_irqrestore (&dum->lock, flags);
+ return retval;
+}
+
+static inline void
+hub_descriptor (struct usb_hub_descriptor *desc)
+{
+ memset (desc, 0, sizeof *desc);
+ desc->bDescriptorType = 0x29;
+ desc->bDescLength = 9;
+ desc->wHubCharacteristics = __constant_cpu_to_le16 (0x0001);
+ desc->bNbrPorts = 1;
+ desc->bitmap [0] = 0xff;
+ desc->bitmap [1] = 0xff;
+}
+
+static int dummy_hub_control (
+ struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue,
+ u16 wIndex,
+ char *buf,
+ u16 wLength
+) {
+ struct dummy *dum;
+ int retval = 0;
+ unsigned long flags;
+
+ dum = hcd_to_dummy (hcd);
+ spin_lock_irqsave (&dum->lock, flags);
+ switch (typeReq) {
+ case ClearHubFeature:
+ break;
+ case ClearPortFeature:
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ if (dum->port_status & (1 << USB_PORT_FEAT_SUSPEND)) {
+ /* 20msec resume signaling */
+ dum->resuming = 1;
+ dum->re_timeout = jiffies +
+ msecs_to_jiffies(20);
+ }
+ break;
+ case USB_PORT_FEAT_POWER:
+ dum->port_status = 0;
+ dum->resuming = 0;
+ stop_activity(dum, dum->driver);
+ break;
+ default:
+ dum->port_status &= ~(1 << wValue);
+ }
+ break;
+ case GetHubDescriptor:
+ hub_descriptor ((struct usb_hub_descriptor *) buf);
+ break;
+ case GetHubStatus:
+ *(u32 *) buf = __constant_cpu_to_le32 (0);
+ break;
+ case GetPortStatus:
+ if (wIndex != 1)
+ retval = -EPIPE;
+
+ /* whoever resets or resumes must GetPortStatus to
+ * complete it!!
+ */
+ if (dum->resuming && time_after (jiffies, dum->re_timeout)) {
+ dum->port_status |= (1 << USB_PORT_FEAT_C_SUSPEND);
+ dum->port_status &= ~(1 << USB_PORT_FEAT_SUSPEND);
+ dum->resuming = 0;
+ dum->re_timeout = 0;
+ if (dum->driver && dum->driver->resume) {
+ spin_unlock (&dum->lock);
+ dum->driver->resume (&dum->gadget);
+ spin_lock (&dum->lock);
+ }
+ }
+ if ((dum->port_status & (1 << USB_PORT_FEAT_RESET)) != 0
+ && time_after (jiffies, dum->re_timeout)) {
+ dum->port_status |= (1 << USB_PORT_FEAT_C_RESET);
+ dum->port_status &= ~(1 << USB_PORT_FEAT_RESET);
+ dum->re_timeout = 0;
+ if (dum->driver) {
+ dum->port_status |= USB_PORT_STAT_ENABLE;
+ /* give it the best speed we agree on */
+ dum->gadget.speed = dum->driver->speed;
+ dum->gadget.ep0->maxpacket = 64;
+ switch (dum->gadget.speed) {
+ case USB_SPEED_HIGH:
+ dum->port_status |=
+ USB_PORT_STAT_HIGH_SPEED;
+ break;
+ case USB_SPEED_LOW:
+ dum->gadget.ep0->maxpacket = 8;
+ dum->port_status |=
+ USB_PORT_STAT_LOW_SPEED;
+ break;
+ default:
+ dum->gadget.speed = USB_SPEED_FULL;
+ break;
+ }
+ }
+ }
+ ((u16 *) buf)[0] = cpu_to_le16 (dum->port_status);
+ ((u16 *) buf)[1] = cpu_to_le16 (dum->port_status >> 16);
+ break;
+ case SetHubFeature:
+ retval = -EPIPE;
+ break;
+ case SetPortFeature:
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ if ((dum->port_status & (1 << USB_PORT_FEAT_SUSPEND))
+ == 0) {
+ dum->port_status |=
+ (1 << USB_PORT_FEAT_SUSPEND);
+ if (dum->driver && dum->driver->suspend) {
+ spin_unlock (&dum->lock);
+ dum->driver->suspend (&dum->gadget);
+ spin_lock (&dum->lock);
+ }
+ }
+ break;
+ case USB_PORT_FEAT_RESET:
+ /* if it's already running, disconnect first */
+ if (dum->port_status & USB_PORT_STAT_ENABLE) {
+ dum->port_status &= ~(USB_PORT_STAT_ENABLE
+ | USB_PORT_STAT_LOW_SPEED
+ | USB_PORT_STAT_HIGH_SPEED);
+ if (dum->driver) {
+ dev_dbg (dummy_dev(dum),
+ "disconnect\n");
+ stop_activity (dum, dum->driver);
+ }
+
+ /* FIXME test that code path! */
+ }
+ /* 50msec reset signaling */
+ dum->re_timeout = jiffies + msecs_to_jiffies(50);
+ /* FALLTHROUGH */
+ default:
+ dum->port_status |= (1 << wValue);
+ }
+ break;
+
+ default:
+ dev_dbg (dummy_dev(dum),
+ "hub control req%04x v%04x i%04x l%d\n",
+ typeReq, wValue, wIndex, wLength);
+
+ /* "protocol stall" on error */
+ retval = -EPIPE;
+ }
+ spin_unlock_irqrestore (&dum->lock, flags);
+ return retval;
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+static inline ssize_t
+show_urb (char *buf, size_t size, struct urb *urb)
+{
+ int ep = usb_pipeendpoint (urb->pipe);
+
+ return snprintf (buf, size,
+ "urb/%p %s ep%d%s%s len %d/%d\n",
+ urb,
+ ({ char *s;
+ switch (urb->dev->speed) {
+ case USB_SPEED_LOW: s = "ls"; break;
+ case USB_SPEED_FULL: s = "fs"; break;
+ case USB_SPEED_HIGH: s = "hs"; break;
+ default: s = "?"; break;
+ }; s; }),
+ ep, ep ? (usb_pipein (urb->pipe) ? "in" : "out") : "",
+ ({ char *s; \
+ switch (usb_pipetype (urb->pipe)) { \
+ case PIPE_CONTROL: s = ""; break; \
+ case PIPE_BULK: s = "-bulk"; break; \
+ case PIPE_INTERRUPT: s = "-int"; break; \
+ default: s = "-iso"; break; \
+ }; s;}),
+ urb->actual_length, urb->transfer_buffer_length);
+}
+
+static ssize_t
+show_urbs (struct device *dev, char *buf)
+{
+ struct usb_hcd *hcd = dev_get_drvdata (dev);
+ struct dummy *dum = hcd_to_dummy (hcd);
+ struct urbp *urbp;
+ size_t size = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave (&dum->lock, flags);
+ list_for_each_entry (urbp, &dum->urbp_list, urbp_list) {
+ size_t temp;
+
+ temp = show_urb (buf, PAGE_SIZE - size, urbp->urb);
+ buf += temp;
+ size += temp;
+ }
+ spin_unlock_irqrestore (&dum->lock, flags);
+
+ return size;
+}
+static DEVICE_ATTR (urbs, S_IRUGO, show_urbs, NULL);
+
+static int dummy_start (struct usb_hcd *hcd)
+{
+ struct dummy *dum;
+ struct usb_device *root;
+ int retval;
+
+ dum = hcd_to_dummy (hcd);
+
+ /*
+ * MASTER side init ... we emulate a root hub that'll only ever
+ * talk to one device (the slave side). Also appears in sysfs,
+ * just like more familiar pci-based HCDs.
+ */
+ spin_lock_init (&dum->lock);
+ init_timer (&dum->timer);
+ dum->timer.function = dummy_timer;
+ dum->timer.data = (unsigned long) dum;
+
+ INIT_LIST_HEAD (&dum->urbp_list);
+
+ root = usb_alloc_dev (NULL, &hcd->self, 0);
+ if (!root)
+ return -ENOMEM;
+
+ /* root hub enters addressed state... */
+ hcd->state = HC_STATE_RUNNING;
+ root->speed = USB_SPEED_HIGH;
+
+ /* ...then configured, so khubd sees us. */
+ if ((retval = usb_hcd_register_root_hub (root, hcd)) != 0) {
+ goto err1;
+ }
+
+ /* only show a low-power port: just 8mA */
+ hub_set_power_budget (root, 8);
+
+ if ((retval = dummy_register_udc (dum)) != 0)
+ goto err2;
+
+ /* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
+ device_create_file (dummy_dev(dum), &dev_attr_urbs);
+ return 0;
+
+ err2:
+ usb_disconnect (&hcd->self.root_hub);
+ err1:
+ usb_put_dev (root);
+ hcd->state = HC_STATE_QUIESCING;
+ return retval;
+}
+
+static void dummy_stop (struct usb_hcd *hcd)
+{
+ struct dummy *dum;
+
+ dum = hcd_to_dummy (hcd);
+
+ device_remove_file (dummy_dev(dum), &dev_attr_urbs);
+
+ usb_gadget_unregister_driver (dum->driver);
+ dummy_unregister_udc (dum);
+
+ dev_info (dummy_dev(dum), "stopped\n");
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int dummy_h_get_frame (struct usb_hcd *hcd)
+{
+ return dummy_g_get_frame (NULL);
+}
+
+static const struct hc_driver dummy_hcd = {
+ .description = (char *) driver_name,
+ .product_desc = "Dummy host controller",
+ .hcd_priv_size = sizeof(struct dummy),
+
+ .flags = HCD_USB2,
+
+ .start = dummy_start,
+ .stop = dummy_stop,
+
+ .urb_enqueue = dummy_urb_enqueue,
+ .urb_dequeue = dummy_urb_dequeue,
+
+ .get_frame_number = dummy_h_get_frame,
+
+ .hub_status_data = dummy_hub_status,
+ .hub_control = dummy_hub_control,
+};
+
+static int dummy_probe (struct device *dev)
+{
+ struct usb_hcd *hcd;
+ int retval;
+
+ dev_info (dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
+
+ hcd = usb_create_hcd (&dummy_hcd, dev, dev->bus_id);
+ if (!hcd)
+ return -ENOMEM;
+ the_controller = hcd_to_dummy (hcd);
+
+ retval = usb_add_hcd(hcd, 0, 0);
+ if (retval != 0) {
+ usb_put_hcd (hcd);
+ the_controller = NULL;
+ }
+ return retval;
+}
+
+static void dummy_remove (struct device *dev)
+{
+ struct usb_hcd *hcd;
+
+ hcd = dev_get_drvdata (dev);
+ usb_remove_hcd (hcd);
+ usb_put_hcd (hcd);
+ the_controller = NULL;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int dummy_pdev_detect (void)
+{
+ int retval;
+
+ retval = driver_register (&dummy_driver);
+ if (retval < 0)
+ return retval;
+
+ the_pdev.name = "hc";
+ the_pdev.dev.driver = &dummy_driver;
+ the_pdev.dev.release = dummy_pdev_release;
+
+ retval = platform_device_register (&the_pdev);
+ if (retval < 0)
+ driver_unregister (&dummy_driver);
+ return retval;
+}
+
+static void dummy_pdev_remove (void)
+{
+ platform_device_unregister (&the_pdev);
+ driver_unregister (&dummy_driver);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __init init (void)
+{
+ int retval;
+
+ if (usb_disabled ())
+ return -ENODEV;
+ if ((retval = dummy_pdev_detect ()) != 0)
+ return retval;
+ if ((retval = dummy_probe (&the_pdev.dev)) != 0)
+ dummy_pdev_remove ();
+ return retval;
+}
+module_init (init);
+
+static void __exit cleanup (void)
+{
+ dummy_remove (&the_pdev.dev);
+ dummy_pdev_remove ();
+}
+module_exit (cleanup);