![Eric Sesterhenn](/assets/img/avatar_default.png)
this patch converts drivers/usb to kzalloc usage. Compile tested with allyes config. I think there was a bug in drivers/usb/gadget/inode.c because it used sizeof(*data) for the kmalloc() and sizeof(data) for the memset(), since sizeof(data) just returns the size for a pointer. Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2053 lines
50 KiB
C
2053 lines
50 KiB
C
/*
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* dummy_hcd.c -- Dummy/Loopback USB host and device emulator driver.
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*
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* Maintainer: Alan Stern <stern@rowland.harvard.edu>
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*
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* Copyright (C) 2003 David Brownell
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* Copyright (C) 2003-2005 Alan Stern
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* This exposes a device side "USB gadget" API, driven by requests to a
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* Linux-USB host controller driver. USB traffic is simulated; there's
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* no need for USB hardware. Use this with two other drivers:
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*
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* - Gadget driver, responding to requests (slave);
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* - Host-side device driver, as already familiar in Linux.
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*
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* Having this all in one kernel can help some stages of development,
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* bypassing some hardware (and driver) issues. UML could help too.
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*/
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#define DEBUG
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/smp_lock.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/usb.h>
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#include <linux/usb_gadget.h>
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#include <asm/byteorder.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/unaligned.h>
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#include "../core/hcd.h"
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#define DRIVER_DESC "USB Host+Gadget Emulator"
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#define DRIVER_VERSION "02 May 2005"
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static const char driver_name [] = "dummy_hcd";
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static const char driver_desc [] = "USB Host+Gadget Emulator";
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static const char gadget_name [] = "dummy_udc";
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MODULE_DESCRIPTION (DRIVER_DESC);
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MODULE_AUTHOR ("David Brownell");
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MODULE_LICENSE ("GPL");
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/*-------------------------------------------------------------------------*/
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/* gadget side driver data structres */
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struct dummy_ep {
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struct list_head queue;
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unsigned long last_io; /* jiffies timestamp */
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struct usb_gadget *gadget;
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const struct usb_endpoint_descriptor *desc;
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struct usb_ep ep;
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unsigned halted : 1;
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unsigned already_seen : 1;
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unsigned setup_stage : 1;
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};
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struct dummy_request {
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struct list_head queue; /* ep's requests */
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struct usb_request req;
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};
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static inline struct dummy_ep *usb_ep_to_dummy_ep (struct usb_ep *_ep)
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{
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return container_of (_ep, struct dummy_ep, ep);
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}
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static inline struct dummy_request *usb_request_to_dummy_request
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(struct usb_request *_req)
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{
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return container_of (_req, struct dummy_request, req);
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}
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/*-------------------------------------------------------------------------*/
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/*
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* Every device has ep0 for control requests, plus up to 30 more endpoints,
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* in one of two types:
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*
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* - Configurable: direction (in/out), type (bulk, iso, etc), and endpoint
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* number can be changed. Names like "ep-a" are used for this type.
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*
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* - Fixed Function: in other cases. some characteristics may be mutable;
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* that'd be hardware-specific. Names like "ep12out-bulk" are used.
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*
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* Gadget drivers are responsible for not setting up conflicting endpoint
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* configurations, illegal or unsupported packet lengths, and so on.
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*/
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static const char ep0name [] = "ep0";
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static const char *const ep_name [] = {
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ep0name, /* everyone has ep0 */
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/* act like a net2280: high speed, six configurable endpoints */
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"ep-a", "ep-b", "ep-c", "ep-d", "ep-e", "ep-f",
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/* or like pxa250: fifteen fixed function endpoints */
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"ep1in-bulk", "ep2out-bulk", "ep3in-iso", "ep4out-iso", "ep5in-int",
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"ep6in-bulk", "ep7out-bulk", "ep8in-iso", "ep9out-iso", "ep10in-int",
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"ep11in-bulk", "ep12out-bulk", "ep13in-iso", "ep14out-iso",
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"ep15in-int",
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/* or like sa1100: two fixed function endpoints */
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"ep1out-bulk", "ep2in-bulk",
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};
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#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_name)
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/*-------------------------------------------------------------------------*/
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#define FIFO_SIZE 64
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struct urbp {
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struct urb *urb;
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struct list_head urbp_list;
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};
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enum dummy_rh_state {
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DUMMY_RH_RESET,
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DUMMY_RH_SUSPENDED,
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DUMMY_RH_RUNNING
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};
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struct dummy {
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spinlock_t lock;
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/*
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* SLAVE/GADGET side support
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*/
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struct dummy_ep ep [DUMMY_ENDPOINTS];
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int address;
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struct usb_gadget gadget;
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struct usb_gadget_driver *driver;
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struct dummy_request fifo_req;
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u8 fifo_buf [FIFO_SIZE];
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u16 devstatus;
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unsigned udc_suspended:1;
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unsigned pullup:1;
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unsigned active:1;
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unsigned old_active:1;
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/*
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* MASTER/HOST side support
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*/
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enum dummy_rh_state rh_state;
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struct timer_list timer;
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u32 port_status;
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u32 old_status;
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unsigned resuming:1;
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unsigned long re_timeout;
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struct usb_device *udev;
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struct list_head urbp_list;
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};
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static inline struct dummy *hcd_to_dummy (struct usb_hcd *hcd)
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{
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return (struct dummy *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *dummy_to_hcd (struct dummy *dum)
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{
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return container_of((void *) dum, struct usb_hcd, hcd_priv);
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}
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static inline struct device *dummy_dev (struct dummy *dum)
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{
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return dummy_to_hcd(dum)->self.controller;
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}
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static inline struct device *udc_dev (struct dummy *dum)
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{
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return dum->gadget.dev.parent;
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}
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static inline struct dummy *ep_to_dummy (struct dummy_ep *ep)
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{
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return container_of (ep->gadget, struct dummy, gadget);
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}
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static inline struct dummy *gadget_to_dummy (struct usb_gadget *gadget)
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{
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return container_of (gadget, struct dummy, gadget);
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}
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static inline struct dummy *gadget_dev_to_dummy (struct device *dev)
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{
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return container_of (dev, struct dummy, gadget.dev);
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}
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static struct dummy *the_controller;
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/*-------------------------------------------------------------------------*/
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/* SLAVE/GADGET SIDE UTILITY ROUTINES */
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/* called with spinlock held */
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static void nuke (struct dummy *dum, struct dummy_ep *ep)
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{
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while (!list_empty (&ep->queue)) {
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struct dummy_request *req;
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req = list_entry (ep->queue.next, struct dummy_request, queue);
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list_del_init (&req->queue);
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req->req.status = -ESHUTDOWN;
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spin_unlock (&dum->lock);
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req->req.complete (&ep->ep, &req->req);
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spin_lock (&dum->lock);
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}
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}
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/* caller must hold lock */
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static void
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stop_activity (struct dummy *dum)
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{
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struct dummy_ep *ep;
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/* prevent any more requests */
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dum->address = 0;
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/* The timer is left running so that outstanding URBs can fail */
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/* nuke any pending requests first, so driver i/o is quiesced */
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list_for_each_entry (ep, &dum->gadget.ep_list, ep.ep_list)
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nuke (dum, ep);
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/* driver now does any non-usb quiescing necessary */
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}
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/* caller must hold lock */
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static void
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set_link_state (struct dummy *dum)
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{
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dum->active = 0;
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if ((dum->port_status & USB_PORT_STAT_POWER) == 0)
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dum->port_status = 0;
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/* UDC suspend must cause a disconnect */
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else if (!dum->pullup || dum->udc_suspended) {
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dum->port_status &= ~(USB_PORT_STAT_CONNECTION |
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USB_PORT_STAT_ENABLE |
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USB_PORT_STAT_LOW_SPEED |
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USB_PORT_STAT_HIGH_SPEED |
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USB_PORT_STAT_SUSPEND);
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if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0)
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dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
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} else {
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dum->port_status |= USB_PORT_STAT_CONNECTION;
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if ((dum->old_status & USB_PORT_STAT_CONNECTION) == 0)
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dum->port_status |= (USB_PORT_STAT_C_CONNECTION << 16);
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if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0)
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dum->port_status &= ~USB_PORT_STAT_SUSPEND;
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else if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
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dum->rh_state != DUMMY_RH_SUSPENDED)
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dum->active = 1;
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}
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if ((dum->port_status & USB_PORT_STAT_ENABLE) == 0 || dum->active)
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dum->resuming = 0;
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if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0 ||
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(dum->port_status & USB_PORT_STAT_RESET) != 0) {
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if ((dum->old_status & USB_PORT_STAT_CONNECTION) != 0 &&
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(dum->old_status & USB_PORT_STAT_RESET) == 0 &&
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dum->driver) {
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stop_activity (dum);
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spin_unlock (&dum->lock);
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dum->driver->disconnect (&dum->gadget);
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spin_lock (&dum->lock);
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}
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} else if (dum->active != dum->old_active) {
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if (dum->old_active && dum->driver->suspend) {
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spin_unlock (&dum->lock);
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dum->driver->suspend (&dum->gadget);
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spin_lock (&dum->lock);
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} else if (!dum->old_active && dum->driver->resume) {
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spin_unlock (&dum->lock);
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dum->driver->resume (&dum->gadget);
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spin_lock (&dum->lock);
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}
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}
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dum->old_status = dum->port_status;
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dum->old_active = dum->active;
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}
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/*-------------------------------------------------------------------------*/
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/* SLAVE/GADGET SIDE DRIVER
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*
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* This only tracks gadget state. All the work is done when the host
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* side tries some (emulated) i/o operation. Real device controller
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* drivers would do real i/o using dma, fifos, irqs, timers, etc.
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*/
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#define is_enabled(dum) \
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(dum->port_status & USB_PORT_STAT_ENABLE)
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static int
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dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
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{
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struct dummy *dum;
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struct dummy_ep *ep;
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unsigned max;
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int retval;
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ep = usb_ep_to_dummy_ep (_ep);
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if (!_ep || !desc || ep->desc || _ep->name == ep0name
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|| desc->bDescriptorType != USB_DT_ENDPOINT)
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return -EINVAL;
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dum = ep_to_dummy (ep);
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if (!dum->driver || !is_enabled (dum))
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return -ESHUTDOWN;
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max = le16_to_cpu(desc->wMaxPacketSize) & 0x3ff;
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/* drivers must not request bad settings, since lower levels
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* (hardware or its drivers) may not check. some endpoints
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* can't do iso, many have maxpacket limitations, etc.
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*
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* since this "hardware" driver is here to help debugging, we
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* have some extra sanity checks. (there could be more though,
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* especially for "ep9out" style fixed function ones.)
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*/
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retval = -EINVAL;
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switch (desc->bmAttributes & 0x03) {
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case USB_ENDPOINT_XFER_BULK:
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if (strstr (ep->ep.name, "-iso")
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|| strstr (ep->ep.name, "-int")) {
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goto done;
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}
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switch (dum->gadget.speed) {
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case USB_SPEED_HIGH:
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if (max == 512)
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break;
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/* conserve return statements */
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default:
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switch (max) {
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case 8: case 16: case 32: case 64:
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/* we'll fake any legal size */
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break;
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default:
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case USB_SPEED_LOW:
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goto done;
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}
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}
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break;
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case USB_ENDPOINT_XFER_INT:
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if (strstr (ep->ep.name, "-iso")) /* bulk is ok */
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goto done;
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/* real hardware might not handle all packet sizes */
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switch (dum->gadget.speed) {
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case USB_SPEED_HIGH:
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if (max <= 1024)
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break;
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/* save a return statement */
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case USB_SPEED_FULL:
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if (max <= 64)
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break;
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/* save a return statement */
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default:
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if (max <= 8)
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break;
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goto done;
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}
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break;
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case USB_ENDPOINT_XFER_ISOC:
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if (strstr (ep->ep.name, "-bulk")
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|| strstr (ep->ep.name, "-int"))
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goto done;
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/* real hardware might not handle all packet sizes */
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switch (dum->gadget.speed) {
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case USB_SPEED_HIGH:
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if (max <= 1024)
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break;
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/* save a return statement */
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case USB_SPEED_FULL:
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if (max <= 1023)
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break;
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/* save a return statement */
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default:
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goto done;
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}
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break;
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default:
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/* few chips support control except on ep0 */
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goto done;
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}
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_ep->maxpacket = max;
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ep->desc = desc;
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dev_dbg (udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d\n",
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_ep->name,
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desc->bEndpointAddress & 0x0f,
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(desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
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({ char *val;
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switch (desc->bmAttributes & 0x03) {
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case USB_ENDPOINT_XFER_BULK: val = "bulk"; break;
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case USB_ENDPOINT_XFER_ISOC: val = "iso"; break;
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case USB_ENDPOINT_XFER_INT: val = "intr"; break;
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default: val = "ctrl"; break;
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}; val; }),
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max);
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/* at this point real hardware should be NAKing transfers
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* to that endpoint, until a buffer is queued to it.
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*/
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retval = 0;
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done:
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return retval;
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}
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static int dummy_disable (struct usb_ep *_ep)
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{
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struct dummy_ep *ep;
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struct dummy *dum;
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unsigned long flags;
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int retval;
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ep = usb_ep_to_dummy_ep (_ep);
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if (!_ep || !ep->desc || _ep->name == ep0name)
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return -EINVAL;
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dum = ep_to_dummy (ep);
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spin_lock_irqsave (&dum->lock, flags);
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ep->desc = NULL;
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retval = 0;
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nuke (dum, ep);
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spin_unlock_irqrestore (&dum->lock, flags);
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dev_dbg (udc_dev(dum), "disabled %s\n", _ep->name);
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return retval;
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}
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static struct usb_request *
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dummy_alloc_request (struct usb_ep *_ep, gfp_t mem_flags)
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{
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struct dummy_ep *ep;
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struct dummy_request *req;
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if (!_ep)
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return NULL;
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ep = usb_ep_to_dummy_ep (_ep);
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req = kzalloc(sizeof(*req), mem_flags);
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if (!req)
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return NULL;
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INIT_LIST_HEAD (&req->queue);
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return &req->req;
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}
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|
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static void
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dummy_free_request (struct usb_ep *_ep, struct usb_request *_req)
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{
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struct dummy_ep *ep;
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struct dummy_request *req;
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ep = usb_ep_to_dummy_ep (_ep);
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if (!ep || !_req || (!ep->desc && _ep->name != ep0name))
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return;
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req = usb_request_to_dummy_request (_req);
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WARN_ON (!list_empty (&req->queue));
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kfree (req);
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}
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|
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static void *
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dummy_alloc_buffer (
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struct usb_ep *_ep,
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unsigned bytes,
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dma_addr_t *dma,
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gfp_t mem_flags
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) {
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char *retval;
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struct dummy_ep *ep;
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struct dummy *dum;
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|
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ep = usb_ep_to_dummy_ep (_ep);
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dum = ep_to_dummy (ep);
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|
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if (!dum->driver)
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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,
|
|
gfp_t 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 (udc_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 (udc_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_B_HNP_ENABLE)
|
|
| (1 << USB_DEVICE_REMOTE_WAKEUP))))
|
|
return -EINVAL;
|
|
if ((dum->port_status & USB_PORT_STAT_CONNECTION) == 0)
|
|
return -ENOLINK;
|
|
if ((dum->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
|
|
dum->rh_state != DUMMY_RH_SUSPENDED)
|
|
return -EIO;
|
|
|
|
/* FIXME: What if the root hub is suspended but the port isn't? */
|
|
|
|
/* hub notices our request, issues downstream resume, etc */
|
|
dum->resuming = 1;
|
|
dum->re_timeout = jiffies + msecs_to_jiffies(20);
|
|
mod_timer (&dummy_to_hcd (dum)->rh_timer, dum->re_timeout);
|
|
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 int dummy_pullup (struct usb_gadget *_gadget, int value)
|
|
{
|
|
struct dummy *dum;
|
|
unsigned long flags;
|
|
|
|
dum = gadget_to_dummy (_gadget);
|
|
spin_lock_irqsave (&dum->lock, flags);
|
|
dum->pullup = (value != 0);
|
|
set_link_state (dum);
|
|
spin_unlock_irqrestore (&dum->lock, flags);
|
|
|
|
usb_hcd_poll_rh_status (dummy_to_hcd (dum));
|
|
return 0;
|
|
}
|
|
|
|
static const struct usb_gadget_ops dummy_ops = {
|
|
.get_frame = dummy_g_get_frame,
|
|
.wakeup = dummy_wakeup,
|
|
.set_selfpowered = dummy_set_selfpowered,
|
|
.pullup = dummy_pullup,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* "function" sysfs attribute */
|
|
static ssize_t
|
|
show_function (struct device *dev, struct device_attribute *attr, 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);
|
|
}
|
|
static 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.
|
|
*/
|
|
|
|
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->devstatus = 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 (udc_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;
|
|
}
|
|
|
|
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 */
|
|
spin_lock_irq (&dum->lock);
|
|
dum->pullup = 1;
|
|
set_link_state (dum);
|
|
spin_unlock_irq (&dum->lock);
|
|
|
|
usb_hcd_poll_rh_status (dummy_to_hcd (dum));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL (usb_gadget_register_driver);
|
|
|
|
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 (udc_dev(dum), "unregister gadget driver '%s'\n",
|
|
driver->driver.name);
|
|
|
|
spin_lock_irqsave (&dum->lock, flags);
|
|
dum->pullup = 0;
|
|
set_link_state (dum);
|
|
spin_unlock_irqrestore (&dum->lock, flags);
|
|
|
|
driver->unbind (&dum->gadget);
|
|
dum->driver = NULL;
|
|
|
|
device_release_driver (&dum->gadget.dev);
|
|
driver_unregister (&driver->driver);
|
|
|
|
spin_lock_irqsave (&dum->lock, flags);
|
|
dum->pullup = 0;
|
|
set_link_state (dum);
|
|
spin_unlock_irqrestore (&dum->lock, flags);
|
|
|
|
usb_hcd_poll_rh_status (dummy_to_hcd (dum));
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL (usb_gadget_unregister_driver);
|
|
|
|
#undef is_enabled
|
|
|
|
/* just declare this in any driver that really need it */
|
|
extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode);
|
|
|
|
int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL (net2280_set_fifo_mode);
|
|
|
|
|
|
/* The gadget structure is stored inside the hcd structure and will be
|
|
* released along with it. */
|
|
static void
|
|
dummy_gadget_release (struct device *dev)
|
|
{
|
|
#if 0 /* usb_bus_put isn't EXPORTed! */
|
|
struct dummy *dum = gadget_dev_to_dummy (dev);
|
|
|
|
usb_bus_put (&dummy_to_hcd (dum)->self);
|
|
#endif
|
|
}
|
|
|
|
static int dummy_udc_probe (struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum = the_controller;
|
|
int rc;
|
|
|
|
dum->gadget.name = gadget_name;
|
|
dum->gadget.ops = &dummy_ops;
|
|
dum->gadget.is_dualspeed = 1;
|
|
|
|
/* maybe claim OTG support, though we won't complete HNP */
|
|
dum->gadget.is_otg = (dummy_to_hcd(dum)->self.otg_port != 0);
|
|
|
|
strcpy (dum->gadget.dev.bus_id, "gadget");
|
|
dum->gadget.dev.parent = &pdev->dev;
|
|
dum->gadget.dev.release = dummy_gadget_release;
|
|
rc = device_register (&dum->gadget.dev);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
#if 0 /* usb_bus_get isn't EXPORTed! */
|
|
usb_bus_get (&dummy_to_hcd (dum)->self);
|
|
#endif
|
|
|
|
platform_set_drvdata (pdev, dum);
|
|
device_create_file (&dum->gadget.dev, &dev_attr_function);
|
|
return rc;
|
|
}
|
|
|
|
static int dummy_udc_remove (struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum = platform_get_drvdata (pdev);
|
|
|
|
platform_set_drvdata (pdev, NULL);
|
|
device_remove_file (&dum->gadget.dev, &dev_attr_function);
|
|
device_unregister (&dum->gadget.dev);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_udc_suspend (struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct dummy *dum = platform_get_drvdata(pdev);
|
|
|
|
dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
|
|
spin_lock_irq (&dum->lock);
|
|
dum->udc_suspended = 1;
|
|
set_link_state (dum);
|
|
spin_unlock_irq (&dum->lock);
|
|
|
|
pdev->dev.power.power_state = state;
|
|
usb_hcd_poll_rh_status (dummy_to_hcd (dum));
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_udc_resume (struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum = platform_get_drvdata(pdev);
|
|
|
|
dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
|
|
spin_lock_irq (&dum->lock);
|
|
dum->udc_suspended = 0;
|
|
set_link_state (dum);
|
|
spin_unlock_irq (&dum->lock);
|
|
|
|
pdev->dev.power.power_state = PMSG_ON;
|
|
usb_hcd_poll_rh_status (dummy_to_hcd (dum));
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver dummy_udc_driver = {
|
|
.probe = dummy_udc_probe,
|
|
.remove = dummy_udc_remove,
|
|
.suspend = dummy_udc_suspend,
|
|
.resume = dummy_udc_resume,
|
|
.driver = {
|
|
.name = (char *) gadget_name,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* 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,
|
|
gfp_t 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)
|
|
{
|
|
struct dummy *dum;
|
|
unsigned long flags;
|
|
|
|
/* giveback happens automatically in timer callback,
|
|
* so make sure the callback happens */
|
|
dum = hcd_to_dummy (hcd);
|
|
spin_lock_irqsave (&dum->lock, flags);
|
|
if (dum->rh_state != DUMMY_RH_RUNNING && !list_empty(&dum->urbp_list))
|
|
mod_timer (&dum->timer, jiffies);
|
|
spin_unlock_irqrestore (&dum->lock, flags);
|
|
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 = (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;
|
|
} else if (dum->rh_state != DUMMY_RH_RUNNING)
|
|
continue;
|
|
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;
|
|
unsigned w_index;
|
|
unsigned w_value;
|
|
|
|
setup = *(struct usb_ctrlrequest*) urb->setup_packet;
|
|
w_index = le16_to_cpu(setup.wIndex);
|
|
w_value = le16_to_cpu(setup.wValue);
|
|
if (le16_to_cpu(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 (udc_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 = w_value;
|
|
maybe_set_status (urb, 0);
|
|
dev_dbg (udc_dev(dum), "set_address = %d\n",
|
|
w_value);
|
|
value = 0;
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
if (setup.bRequestType == Dev_Request) {
|
|
value = 0;
|
|
switch (w_value) {
|
|
case USB_DEVICE_REMOTE_WAKEUP:
|
|
break;
|
|
case USB_DEVICE_B_HNP_ENABLE:
|
|
dum->gadget.b_hnp_enable = 1;
|
|
break;
|
|
case USB_DEVICE_A_HNP_SUPPORT:
|
|
dum->gadget.a_hnp_support = 1;
|
|
break;
|
|
case USB_DEVICE_A_ALT_HNP_SUPPORT:
|
|
dum->gadget.a_alt_hnp_support
|
|
= 1;
|
|
break;
|
|
default:
|
|
value = -EOPNOTSUPP;
|
|
}
|
|
if (value == 0) {
|
|
dum->devstatus |=
|
|
(1 << w_value);
|
|
maybe_set_status (urb, 0);
|
|
}
|
|
|
|
} else if (setup.bRequestType == Ep_Request) {
|
|
// endpoint halt
|
|
ep2 = find_endpoint (dum, w_index);
|
|
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 (w_value) {
|
|
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, w_index);
|
|
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, w_index);
|
|
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 (udc_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;
|
|
}
|
|
|
|
if (list_empty (&dum->urbp_list)) {
|
|
usb_put_dev (dum->udev);
|
|
dum->udev = NULL;
|
|
} else if (dum->rh_state == DUMMY_RH_RUNNING) {
|
|
/* want a 1 msec delay here */
|
|
mod_timer (&dum->timer, jiffies + msecs_to_jiffies(1));
|
|
}
|
|
|
|
spin_unlock_irqrestore (&dum->lock, flags);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
#define PORT_C_MASK \
|
|
((USB_PORT_STAT_C_CONNECTION \
|
|
| USB_PORT_STAT_C_ENABLE \
|
|
| USB_PORT_STAT_C_SUSPEND \
|
|
| USB_PORT_STAT_C_OVERCURRENT \
|
|
| USB_PORT_STAT_C_RESET) << 16)
|
|
|
|
static int dummy_hub_status (struct usb_hcd *hcd, char *buf)
|
|
{
|
|
struct dummy *dum;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
|
|
dum = hcd_to_dummy (hcd);
|
|
|
|
spin_lock_irqsave (&dum->lock, flags);
|
|
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
|
|
goto done;
|
|
|
|
if (dum->resuming && time_after_eq (jiffies, dum->re_timeout)) {
|
|
dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
|
|
dum->port_status &= ~USB_PORT_STAT_SUSPEND;
|
|
set_link_state (dum);
|
|
}
|
|
|
|
if ((dum->port_status & PORT_C_MASK) != 0) {
|
|
*buf = (1 << 1);
|
|
dev_dbg (dummy_dev(dum), "port status 0x%08x has changes\n",
|
|
dum->port_status);
|
|
retval = 1;
|
|
if (dum->rh_state == DUMMY_RH_SUSPENDED)
|
|
usb_hcd_resume_root_hub (hcd);
|
|
}
|
|
done:
|
|
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 = (__force __u16)
|
|
(__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;
|
|
|
|
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
|
|
return -ETIMEDOUT;
|
|
|
|
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 & USB_PORT_STAT_SUSPEND) {
|
|
/* 20msec resume signaling */
|
|
dum->resuming = 1;
|
|
dum->re_timeout = jiffies +
|
|
msecs_to_jiffies(20);
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (dum->port_status & USB_PORT_STAT_POWER)
|
|
dev_dbg (dummy_dev(dum), "power-off\n");
|
|
/* FALLS THROUGH */
|
|
default:
|
|
dum->port_status &= ~(1 << wValue);
|
|
set_link_state (dum);
|
|
}
|
|
break;
|
|
case GetHubDescriptor:
|
|
hub_descriptor ((struct usb_hub_descriptor *) buf);
|
|
break;
|
|
case GetHubStatus:
|
|
*(__le32 *) 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_eq (jiffies, dum->re_timeout)) {
|
|
dum->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
|
|
dum->port_status &= ~USB_PORT_STAT_SUSPEND;
|
|
}
|
|
if ((dum->port_status & USB_PORT_STAT_RESET) != 0 &&
|
|
time_after_eq (jiffies, dum->re_timeout)) {
|
|
dum->port_status |= (USB_PORT_STAT_C_RESET << 16);
|
|
dum->port_status &= ~USB_PORT_STAT_RESET;
|
|
if (dum->pullup) {
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
set_link_state (dum);
|
|
((__le16 *) buf)[0] = cpu_to_le16 (dum->port_status);
|
|
((__le16 *) 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->active) {
|
|
dum->port_status |= USB_PORT_STAT_SUSPEND;
|
|
|
|
/* HNP would happen here; for now we
|
|
* assume b_bus_req is always true.
|
|
*/
|
|
set_link_state (dum);
|
|
if (((1 << USB_DEVICE_B_HNP_ENABLE)
|
|
& dum->devstatus) != 0)
|
|
dev_dbg (dummy_dev(dum),
|
|
"no HNP yet!\n");
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
dum->port_status |= USB_PORT_STAT_POWER;
|
|
set_link_state (dum);
|
|
break;
|
|
case USB_PORT_FEAT_RESET:
|
|
/* if it's already enabled, disable */
|
|
dum->port_status &= ~(USB_PORT_STAT_ENABLE
|
|
| USB_PORT_STAT_LOW_SPEED
|
|
| USB_PORT_STAT_HIGH_SPEED);
|
|
dum->devstatus = 0;
|
|
/* 50msec reset signaling */
|
|
dum->re_timeout = jiffies + msecs_to_jiffies(50);
|
|
/* FALLS THROUGH */
|
|
default:
|
|
if ((dum->port_status & USB_PORT_STAT_POWER) != 0) {
|
|
dum->port_status |= (1 << wValue);
|
|
set_link_state (dum);
|
|
}
|
|
}
|
|
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);
|
|
|
|
if ((dum->port_status & PORT_C_MASK) != 0)
|
|
usb_hcd_poll_rh_status (hcd);
|
|
return retval;
|
|
}
|
|
|
|
static int dummy_bus_suspend (struct usb_hcd *hcd)
|
|
{
|
|
struct dummy *dum = hcd_to_dummy (hcd);
|
|
|
|
dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__);
|
|
|
|
spin_lock_irq (&dum->lock);
|
|
dum->rh_state = DUMMY_RH_SUSPENDED;
|
|
set_link_state (dum);
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
spin_unlock_irq (&dum->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_bus_resume (struct usb_hcd *hcd)
|
|
{
|
|
struct dummy *dum = hcd_to_dummy (hcd);
|
|
int rc = 0;
|
|
|
|
dev_dbg (&hcd->self.root_hub->dev, "%s\n", __FUNCTION__);
|
|
|
|
spin_lock_irq (&dum->lock);
|
|
if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
|
|
dev_warn (&hcd->self.root_hub->dev, "HC isn't running!\n");
|
|
rc = -ENODEV;
|
|
} else {
|
|
dum->rh_state = DUMMY_RH_RUNNING;
|
|
set_link_state (dum);
|
|
if (!list_empty(&dum->urbp_list))
|
|
mod_timer (&dum->timer, jiffies);
|
|
hcd->state = HC_STATE_RUNNING;
|
|
}
|
|
spin_unlock_irq (&dum->lock);
|
|
return rc;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
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, struct device_attribute *attr, 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;
|
|
|
|
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;
|
|
dum->rh_state = DUMMY_RH_RUNNING;
|
|
|
|
INIT_LIST_HEAD (&dum->urbp_list);
|
|
|
|
/* only show a low-power port: just 8mA */
|
|
hcd->power_budget = 8;
|
|
hcd->state = HC_STATE_RUNNING;
|
|
hcd->uses_new_polling = 1;
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
hcd->self.otg_port = 1;
|
|
#endif
|
|
|
|
/* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
|
|
device_create_file (dummy_dev(dum), &dev_attr_urbs);
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
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,
|
|
.bus_suspend = dummy_bus_suspend,
|
|
.bus_resume = dummy_bus_resume,
|
|
};
|
|
|
|
static int dummy_hcd_probe(struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
int retval;
|
|
|
|
dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
|
|
|
|
hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, pdev->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 int dummy_hcd_remove (struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
|
|
hcd = platform_get_drvdata (pdev);
|
|
usb_remove_hcd (hcd);
|
|
usb_put_hcd (hcd);
|
|
the_controller = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_hcd_suspend (struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct dummy *dum;
|
|
int rc = 0;
|
|
|
|
dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
|
|
|
|
hcd = platform_get_drvdata (pdev);
|
|
dum = hcd_to_dummy (hcd);
|
|
if (dum->rh_state == DUMMY_RH_RUNNING) {
|
|
dev_warn(&pdev->dev, "Root hub isn't suspended!\n");
|
|
rc = -EBUSY;
|
|
} else
|
|
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
return rc;
|
|
}
|
|
|
|
static int dummy_hcd_resume (struct platform_device *pdev)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
|
|
dev_dbg (&pdev->dev, "%s\n", __FUNCTION__);
|
|
|
|
hcd = platform_get_drvdata (pdev);
|
|
set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
|
|
usb_hcd_poll_rh_status (hcd);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver dummy_hcd_driver = {
|
|
.probe = dummy_hcd_probe,
|
|
.remove = dummy_hcd_remove,
|
|
.suspend = dummy_hcd_suspend,
|
|
.resume = dummy_hcd_resume,
|
|
.driver = {
|
|
.name = (char *) driver_name,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* These don't need to do anything because the pdev structures are
|
|
* statically allocated. */
|
|
static void
|
|
dummy_udc_release (struct device *dev) {}
|
|
|
|
static void
|
|
dummy_hcd_release (struct device *dev) {}
|
|
|
|
static struct platform_device the_udc_pdev = {
|
|
.name = (char *) gadget_name,
|
|
.id = -1,
|
|
.dev = {
|
|
.release = dummy_udc_release,
|
|
},
|
|
};
|
|
|
|
static struct platform_device the_hcd_pdev = {
|
|
.name = (char *) driver_name,
|
|
.id = -1,
|
|
.dev = {
|
|
.release = dummy_hcd_release,
|
|
},
|
|
};
|
|
|
|
static int __init init (void)
|
|
{
|
|
int retval;
|
|
|
|
if (usb_disabled ())
|
|
return -ENODEV;
|
|
|
|
retval = platform_driver_register (&dummy_hcd_driver);
|
|
if (retval < 0)
|
|
return retval;
|
|
|
|
retval = platform_driver_register (&dummy_udc_driver);
|
|
if (retval < 0)
|
|
goto err_register_udc_driver;
|
|
|
|
retval = platform_device_register (&the_hcd_pdev);
|
|
if (retval < 0)
|
|
goto err_register_hcd;
|
|
|
|
retval = platform_device_register (&the_udc_pdev);
|
|
if (retval < 0)
|
|
goto err_register_udc;
|
|
return retval;
|
|
|
|
err_register_udc:
|
|
platform_device_unregister (&the_hcd_pdev);
|
|
err_register_hcd:
|
|
platform_driver_unregister (&dummy_udc_driver);
|
|
err_register_udc_driver:
|
|
platform_driver_unregister (&dummy_hcd_driver);
|
|
return retval;
|
|
}
|
|
module_init (init);
|
|
|
|
static void __exit cleanup (void)
|
|
{
|
|
platform_device_unregister (&the_udc_pdev);
|
|
platform_device_unregister (&the_hcd_pdev);
|
|
platform_driver_unregister (&dummy_udc_driver);
|
|
platform_driver_unregister (&dummy_hcd_driver);
|
|
}
|
|
module_exit (cleanup);
|