2873 lines
72 KiB
C
2873 lines
72 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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/*
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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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* Note: The emulation does not include isochronous transfers!
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*/
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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/slab.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 <linux/usb/hcd.h>
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#include <linux/scatterlist.h>
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#include <asm/byteorder.h>
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#include <linux/io.h>
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#include <asm/irq.h>
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#include <asm/unaligned.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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#define POWER_BUDGET 500 /* in mA; use 8 for low-power port testing */
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#define POWER_BUDGET_3 900 /* in mA */
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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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struct dummy_hcd_module_parameters {
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bool is_super_speed;
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bool is_high_speed;
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unsigned int num;
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};
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static struct dummy_hcd_module_parameters mod_data = {
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.is_super_speed = false,
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.is_high_speed = true,
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.num = 1,
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};
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module_param_named(is_super_speed, mod_data.is_super_speed, bool, S_IRUGO);
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MODULE_PARM_DESC(is_super_speed, "true to simulate SuperSpeed connection");
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module_param_named(is_high_speed, mod_data.is_high_speed, bool, S_IRUGO);
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MODULE_PARM_DESC(is_high_speed, "true to simulate HighSpeed connection");
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module_param_named(num, mod_data.num, uint, S_IRUGO);
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MODULE_PARM_DESC(num, "number of emulated controllers");
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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 wedged:1;
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unsigned already_seen:1;
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unsigned setup_stage:1;
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unsigned stream_en: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 struct {
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const char *name;
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const struct usb_ep_caps caps;
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} ep_info[] = {
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#define EP_INFO(_name, _caps) \
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{ \
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.name = _name, \
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.caps = _caps, \
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}
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/* we don't provide isochronous endpoints since we don't support them */
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#define TYPE_BULK_OR_INT (USB_EP_CAPS_TYPE_BULK | USB_EP_CAPS_TYPE_INT)
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/* everyone has ep0 */
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EP_INFO(ep0name,
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USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)),
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/* act like a pxa250: fifteen fixed function endpoints */
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EP_INFO("ep1in-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep2out-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
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/*
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EP_INFO("ep3in-iso",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep4out-iso",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
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*/
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EP_INFO("ep5in-int",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep6in-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep7out-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
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/*
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EP_INFO("ep8in-iso",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep9out-iso",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
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*/
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EP_INFO("ep10in-int",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep11in-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep12out-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
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/*
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EP_INFO("ep13in-iso",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep14out-iso",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_OUT)),
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*/
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EP_INFO("ep15in-int",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)),
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/* or like sa1100: two fixed function endpoints */
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EP_INFO("ep1out-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep2in-bulk",
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USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_IN)),
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/* and now some generic EPs so we have enough in multi config */
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EP_INFO("ep3out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep4in",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep5out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep6out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep7in",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep8out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep9in",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep10out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep11out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep12in",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep13out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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EP_INFO("ep14in",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_IN)),
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EP_INFO("ep15out",
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USB_EP_CAPS(TYPE_BULK_OR_INT, USB_EP_CAPS_DIR_OUT)),
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#undef EP_INFO
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};
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#define DUMMY_ENDPOINTS ARRAY_SIZE(ep_info)
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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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struct sg_mapping_iter miter;
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u32 miter_started;
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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_hcd {
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struct dummy *dum;
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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 long re_timeout;
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struct usb_device *udev;
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struct list_head urbp_list;
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struct urbp *next_frame_urbp;
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u32 stream_en_ep;
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u8 num_stream[30 / 2];
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unsigned active:1;
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unsigned old_active:1;
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unsigned resuming:1;
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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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int callback_usage;
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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 ints_enabled:1;
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unsigned udc_suspended:1;
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unsigned pullup:1;
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/*
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* MASTER/HOST side support
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*/
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struct dummy_hcd *hs_hcd;
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struct dummy_hcd *ss_hcd;
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};
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static inline struct dummy_hcd *hcd_to_dummy_hcd(struct usb_hcd *hcd)
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{
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return (struct dummy_hcd *) (hcd->hcd_priv);
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}
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static inline struct usb_hcd *dummy_hcd_to_hcd(struct dummy_hcd *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_hcd *dum)
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{
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return dummy_hcd_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_hcd *gadget_to_dummy_hcd(struct usb_gadget *gadget)
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{
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struct dummy *dum = container_of(gadget, struct dummy, gadget);
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if (dum->gadget.speed == USB_SPEED_SUPER)
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return dum->ss_hcd;
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else
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return dum->hs_hcd;
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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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/*-------------------------------------------------------------------------*/
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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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usb_gadget_giveback_request(&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 stop_activity(struct dummy *dum)
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{
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int i;
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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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for (i = 0; i < DUMMY_ENDPOINTS; ++i)
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nuke(dum, &dum->ep[i]);
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/* driver now does any non-usb quiescing necessary */
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}
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/**
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* set_link_state_by_speed() - Sets the current state of the link according to
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* the hcd speed
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* @dum_hcd: pointer to the dummy_hcd structure to update the link state for
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*
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* This function updates the port_status according to the link state and the
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* speed of the hcd.
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*/
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static void set_link_state_by_speed(struct dummy_hcd *dum_hcd)
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{
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struct dummy *dum = dum_hcd->dum;
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if (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3) {
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if ((dum_hcd->port_status & USB_SS_PORT_STAT_POWER) == 0) {
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dum_hcd->port_status = 0;
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} else if (!dum->pullup || dum->udc_suspended) {
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/* UDC suspend must cause a disconnect */
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dum_hcd->port_status &= ~(USB_PORT_STAT_CONNECTION |
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USB_PORT_STAT_ENABLE);
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if ((dum_hcd->old_status &
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USB_PORT_STAT_CONNECTION) != 0)
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dum_hcd->port_status |=
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(USB_PORT_STAT_C_CONNECTION << 16);
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} else {
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/* device is connected and not suspended */
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dum_hcd->port_status |= (USB_PORT_STAT_CONNECTION |
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USB_PORT_STAT_SPEED_5GBPS) ;
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if ((dum_hcd->old_status &
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USB_PORT_STAT_CONNECTION) == 0)
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dum_hcd->port_status |=
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(USB_PORT_STAT_C_CONNECTION << 16);
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if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) &&
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(dum_hcd->port_status &
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USB_PORT_STAT_LINK_STATE) == USB_SS_PORT_LS_U0 &&
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dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
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dum_hcd->active = 1;
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}
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} else {
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if ((dum_hcd->port_status & USB_PORT_STAT_POWER) == 0) {
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dum_hcd->port_status = 0;
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} else if (!dum->pullup || dum->udc_suspended) {
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/* UDC suspend must cause a disconnect */
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dum_hcd->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_hcd->old_status &
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USB_PORT_STAT_CONNECTION) != 0)
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dum_hcd->port_status |=
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(USB_PORT_STAT_C_CONNECTION << 16);
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} else {
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dum_hcd->port_status |= USB_PORT_STAT_CONNECTION;
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if ((dum_hcd->old_status &
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USB_PORT_STAT_CONNECTION) == 0)
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dum_hcd->port_status |=
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(USB_PORT_STAT_C_CONNECTION << 16);
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if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0)
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dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
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else if ((dum_hcd->port_status &
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USB_PORT_STAT_SUSPEND) == 0 &&
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dum_hcd->rh_state != DUMMY_RH_SUSPENDED)
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dum_hcd->active = 1;
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}
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}
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}
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/* caller must hold lock */
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static void set_link_state(struct dummy_hcd *dum_hcd)
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{
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struct dummy *dum = dum_hcd->dum;
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unsigned int power_bit;
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dum_hcd->active = 0;
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if (dum->pullup)
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if ((dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 &&
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dum->gadget.speed != USB_SPEED_SUPER) ||
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(dummy_hcd_to_hcd(dum_hcd)->speed != HCD_USB3 &&
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dum->gadget.speed == USB_SPEED_SUPER))
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return;
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set_link_state_by_speed(dum_hcd);
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power_bit = (dummy_hcd_to_hcd(dum_hcd)->speed == HCD_USB3 ?
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USB_SS_PORT_STAT_POWER : USB_PORT_STAT_POWER);
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if ((dum_hcd->port_status & USB_PORT_STAT_ENABLE) == 0 ||
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dum_hcd->active)
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dum_hcd->resuming = 0;
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/* Currently !connected or in reset */
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if ((dum_hcd->port_status & power_bit) == 0 ||
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(dum_hcd->port_status & USB_PORT_STAT_RESET) != 0) {
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unsigned int disconnect = power_bit &
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dum_hcd->old_status & (~dum_hcd->port_status);
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unsigned int reset = USB_PORT_STAT_RESET &
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(~dum_hcd->old_status) & dum_hcd->port_status;
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/* Report reset and disconnect events to the driver */
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if (dum->ints_enabled && (disconnect || reset)) {
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stop_activity(dum);
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|
++dum->callback_usage;
|
|
spin_unlock(&dum->lock);
|
|
if (reset)
|
|
usb_gadget_udc_reset(&dum->gadget, dum->driver);
|
|
else
|
|
dum->driver->disconnect(&dum->gadget);
|
|
spin_lock(&dum->lock);
|
|
--dum->callback_usage;
|
|
}
|
|
} else if (dum_hcd->active != dum_hcd->old_active &&
|
|
dum->ints_enabled) {
|
|
++dum->callback_usage;
|
|
spin_unlock(&dum->lock);
|
|
if (dum_hcd->old_active && dum->driver->suspend)
|
|
dum->driver->suspend(&dum->gadget);
|
|
else if (!dum_hcd->old_active && dum->driver->resume)
|
|
dum->driver->resume(&dum->gadget);
|
|
spin_lock(&dum->lock);
|
|
--dum->callback_usage;
|
|
}
|
|
|
|
dum_hcd->old_status = dum_hcd->port_status;
|
|
dum_hcd->old_active = dum_hcd->active;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* 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_hcd *dum_hcd;
|
|
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)
|
|
return -ESHUTDOWN;
|
|
|
|
dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
|
|
if (!is_enabled(dum_hcd))
|
|
return -ESHUTDOWN;
|
|
|
|
/*
|
|
* For HS/FS devices only bits 0..10 of the wMaxPacketSize represent the
|
|
* maximum packet size.
|
|
* For SS devices the wMaxPacketSize is limited by 1024.
|
|
*/
|
|
max = usb_endpoint_maxp(desc);
|
|
|
|
/* 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 (usb_endpoint_type(desc)) {
|
|
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_SUPER:
|
|
if (max == 1024)
|
|
break;
|
|
goto done;
|
|
case USB_SPEED_HIGH:
|
|
if (max == 512)
|
|
break;
|
|
goto done;
|
|
case USB_SPEED_FULL:
|
|
if (max == 8 || max == 16 || max == 32 || max == 64)
|
|
/* we'll fake any legal size */
|
|
break;
|
|
/* save a return statement */
|
|
default:
|
|
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_SUPER:
|
|
case USB_SPEED_HIGH:
|
|
if (max <= 1024)
|
|
break;
|
|
/* save a return statement */
|
|
/* fall through */
|
|
case USB_SPEED_FULL:
|
|
if (max <= 64)
|
|
break;
|
|
/* save a return statement */
|
|
/* fall through */
|
|
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_SUPER:
|
|
case USB_SPEED_HIGH:
|
|
if (max <= 1024)
|
|
break;
|
|
/* save a return statement */
|
|
/* fall through */
|
|
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;
|
|
if (usb_ss_max_streams(_ep->comp_desc)) {
|
|
if (!usb_endpoint_xfer_bulk(desc)) {
|
|
dev_err(udc_dev(dum), "Can't enable stream support on "
|
|
"non-bulk ep %s\n", _ep->name);
|
|
return -EINVAL;
|
|
}
|
|
ep->stream_en = 1;
|
|
}
|
|
ep->desc = desc;
|
|
|
|
dev_dbg(udc_dev(dum), "enabled %s (ep%d%s-%s) maxpacket %d stream %s\n",
|
|
_ep->name,
|
|
desc->bEndpointAddress & 0x0f,
|
|
(desc->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
|
|
usb_ep_type_string(usb_endpoint_type(desc)),
|
|
max, ep->stream_en ? "enabled" : "disabled");
|
|
|
|
/* at this point real hardware should be NAKing transfers
|
|
* to that endpoint, until a buffer is queued to it.
|
|
*/
|
|
ep->halted = ep->wedged = 0;
|
|
retval = 0;
|
|
done:
|
|
return retval;
|
|
}
|
|
|
|
static int dummy_disable(struct usb_ep *_ep)
|
|
{
|
|
struct dummy_ep *ep;
|
|
struct dummy *dum;
|
|
unsigned long flags;
|
|
|
|
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;
|
|
ep->stream_en = 0;
|
|
nuke(dum, ep);
|
|
spin_unlock_irqrestore(&dum->lock, flags);
|
|
|
|
dev_dbg(udc_dev(dum), "disabled %s\n", _ep->name);
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_request *dummy_alloc_request(struct usb_ep *_ep,
|
|
gfp_t mem_flags)
|
|
{
|
|
struct dummy_request *req;
|
|
|
|
if (!_ep)
|
|
return NULL;
|
|
|
|
req = kzalloc(sizeof(*req), mem_flags);
|
|
if (!req)
|
|
return NULL;
|
|
INIT_LIST_HEAD(&req->queue);
|
|
return &req->req;
|
|
}
|
|
|
|
static void dummy_free_request(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct dummy_request *req;
|
|
|
|
if (!_ep || !_req) {
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
|
|
req = usb_request_to_dummy_request(_req);
|
|
WARN_ON(!list_empty(&req->queue));
|
|
kfree(req);
|
|
}
|
|
|
|
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;
|
|
struct dummy_hcd *dum_hcd;
|
|
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);
|
|
dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
|
|
if (!dum->driver || !is_enabled(dum_hcd))
|
|
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;
|
|
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
spin_unlock(&dum->lock);
|
|
_req->actual = _req->length;
|
|
_req->status = 0;
|
|
usb_gadget_giveback_request(_ep, _req);
|
|
spin_lock(&dum->lock);
|
|
} else
|
|
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;
|
|
|
|
local_irq_save(flags);
|
|
spin_lock(&dum->lock);
|
|
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(&dum->lock);
|
|
|
|
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);
|
|
usb_gadget_giveback_request(_ep, _req);
|
|
}
|
|
local_irq_restore(flags);
|
|
return retval;
|
|
}
|
|
|
|
static int
|
|
dummy_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
|
|
{
|
|
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 = ep->wedged = 0;
|
|
else if (ep->desc && (ep->desc->bEndpointAddress & USB_DIR_IN) &&
|
|
!list_empty(&ep->queue))
|
|
return -EAGAIN;
|
|
else {
|
|
ep->halted = 1;
|
|
if (wedged)
|
|
ep->wedged = 1;
|
|
}
|
|
/* FIXME clear emulated data toggle too */
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
dummy_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
return dummy_set_halt_and_wedge(_ep, value, 0);
|
|
}
|
|
|
|
static int dummy_set_wedge(struct usb_ep *_ep)
|
|
{
|
|
if (!_ep || _ep->name == ep0name)
|
|
return -EINVAL;
|
|
return dummy_set_halt_and_wedge(_ep, 1, 1);
|
|
}
|
|
|
|
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,
|
|
|
|
.queue = dummy_queue,
|
|
.dequeue = dummy_dequeue,
|
|
|
|
.set_halt = dummy_set_halt,
|
|
.set_wedge = dummy_set_wedge,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* there are both host and device side versions of this call ... */
|
|
static int dummy_g_get_frame(struct usb_gadget *_gadget)
|
|
{
|
|
struct timespec64 ts64;
|
|
|
|
ktime_get_ts64(&ts64);
|
|
return ts64.tv_nsec / NSEC_PER_MSEC;
|
|
}
|
|
|
|
static int dummy_wakeup(struct usb_gadget *_gadget)
|
|
{
|
|
struct dummy_hcd *dum_hcd;
|
|
|
|
dum_hcd = gadget_to_dummy_hcd(_gadget);
|
|
if (!(dum_hcd->dum->devstatus & ((1 << USB_DEVICE_B_HNP_ENABLE)
|
|
| (1 << USB_DEVICE_REMOTE_WAKEUP))))
|
|
return -EINVAL;
|
|
if ((dum_hcd->port_status & USB_PORT_STAT_CONNECTION) == 0)
|
|
return -ENOLINK;
|
|
if ((dum_hcd->port_status & USB_PORT_STAT_SUSPEND) == 0 &&
|
|
dum_hcd->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_hcd->resuming = 1;
|
|
dum_hcd->re_timeout = jiffies + msecs_to_jiffies(20);
|
|
mod_timer(&dummy_hcd_to_hcd(dum_hcd)->rh_timer, dum_hcd->re_timeout);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_set_selfpowered(struct usb_gadget *_gadget, int value)
|
|
{
|
|
struct dummy *dum;
|
|
|
|
_gadget->is_selfpowered = (value != 0);
|
|
dum = gadget_to_dummy_hcd(_gadget)->dum;
|
|
if (value)
|
|
dum->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
|
|
else
|
|
dum->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_udc_update_ep0(struct dummy *dum)
|
|
{
|
|
if (dum->gadget.speed == USB_SPEED_SUPER)
|
|
dum->ep[0].ep.maxpacket = 9;
|
|
else
|
|
dum->ep[0].ep.maxpacket = 64;
|
|
}
|
|
|
|
static int dummy_pullup(struct usb_gadget *_gadget, int value)
|
|
{
|
|
struct dummy_hcd *dum_hcd;
|
|
struct dummy *dum;
|
|
unsigned long flags;
|
|
|
|
dum = gadget_dev_to_dummy(&_gadget->dev);
|
|
dum_hcd = gadget_to_dummy_hcd(_gadget);
|
|
|
|
spin_lock_irqsave(&dum->lock, flags);
|
|
dum->pullup = (value != 0);
|
|
set_link_state(dum_hcd);
|
|
spin_unlock_irqrestore(&dum->lock, flags);
|
|
|
|
usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_udc_set_speed(struct usb_gadget *_gadget,
|
|
enum usb_device_speed speed)
|
|
{
|
|
struct dummy *dum;
|
|
|
|
dum = gadget_dev_to_dummy(&_gadget->dev);
|
|
dum->gadget.speed = speed;
|
|
dummy_udc_update_ep0(dum);
|
|
}
|
|
|
|
static int dummy_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver);
|
|
static int dummy_udc_stop(struct usb_gadget *g);
|
|
|
|
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,
|
|
.udc_start = dummy_udc_start,
|
|
.udc_stop = dummy_udc_stop,
|
|
.udc_set_speed = dummy_udc_set_speed,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/* "function" sysfs attribute */
|
|
static ssize_t function_show(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_RO(function);
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* 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 int dummy_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
|
|
struct dummy *dum = dum_hcd->dum;
|
|
|
|
switch (g->speed) {
|
|
/* All the speeds we support */
|
|
case USB_SPEED_LOW:
|
|
case USB_SPEED_FULL:
|
|
case USB_SPEED_HIGH:
|
|
case USB_SPEED_SUPER:
|
|
break;
|
|
default:
|
|
dev_err(dummy_dev(dum_hcd), "Unsupported driver max speed %d\n",
|
|
driver->max_speed);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* SLAVE side init ... the layer above hardware, which
|
|
* can't enumerate without help from the driver we're binding.
|
|
*/
|
|
|
|
spin_lock_irq(&dum->lock);
|
|
dum->devstatus = 0;
|
|
dum->driver = driver;
|
|
dum->ints_enabled = 1;
|
|
spin_unlock_irq(&dum->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_udc_stop(struct usb_gadget *g)
|
|
{
|
|
struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(g);
|
|
struct dummy *dum = dum_hcd->dum;
|
|
|
|
spin_lock_irq(&dum->lock);
|
|
dum->ints_enabled = 0;
|
|
stop_activity(dum);
|
|
|
|
/* emulate synchronize_irq(): wait for callbacks to finish */
|
|
while (dum->callback_usage > 0) {
|
|
spin_unlock_irq(&dum->lock);
|
|
usleep_range(1000, 2000);
|
|
spin_lock_irq(&dum->lock);
|
|
}
|
|
|
|
dum->driver = NULL;
|
|
spin_unlock_irq(&dum->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#undef is_enabled
|
|
|
|
/* The gadget structure is stored inside the hcd structure and will be
|
|
* released along with it. */
|
|
static void init_dummy_udc_hw(struct dummy *dum)
|
|
{
|
|
int i;
|
|
|
|
INIT_LIST_HEAD(&dum->gadget.ep_list);
|
|
for (i = 0; i < DUMMY_ENDPOINTS; i++) {
|
|
struct dummy_ep *ep = &dum->ep[i];
|
|
|
|
if (!ep_info[i].name)
|
|
break;
|
|
ep->ep.name = ep_info[i].name;
|
|
ep->ep.caps = ep_info[i].caps;
|
|
ep->ep.ops = &dummy_ep_ops;
|
|
list_add_tail(&ep->ep.ep_list, &dum->gadget.ep_list);
|
|
ep->halted = ep->wedged = ep->already_seen =
|
|
ep->setup_stage = 0;
|
|
usb_ep_set_maxpacket_limit(&ep->ep, ~0);
|
|
ep->ep.max_streams = 16;
|
|
ep->last_io = jiffies;
|
|
ep->gadget = &dum->gadget;
|
|
ep->desc = NULL;
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
}
|
|
|
|
dum->gadget.ep0 = &dum->ep[0].ep;
|
|
list_del_init(&dum->ep[0].ep.ep_list);
|
|
INIT_LIST_HEAD(&dum->fifo_req.queue);
|
|
|
|
#ifdef CONFIG_USB_OTG
|
|
dum->gadget.is_otg = 1;
|
|
#endif
|
|
}
|
|
|
|
static int dummy_udc_probe(struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum;
|
|
int rc;
|
|
|
|
dum = *((void **)dev_get_platdata(&pdev->dev));
|
|
/* Clear usb_gadget region for new registration to udc-core */
|
|
memzero_explicit(&dum->gadget, sizeof(struct usb_gadget));
|
|
dum->gadget.name = gadget_name;
|
|
dum->gadget.ops = &dummy_ops;
|
|
if (mod_data.is_super_speed)
|
|
dum->gadget.max_speed = USB_SPEED_SUPER;
|
|
else if (mod_data.is_high_speed)
|
|
dum->gadget.max_speed = USB_SPEED_HIGH;
|
|
else
|
|
dum->gadget.max_speed = USB_SPEED_FULL;
|
|
|
|
dum->gadget.dev.parent = &pdev->dev;
|
|
init_dummy_udc_hw(dum);
|
|
|
|
rc = usb_add_gadget_udc(&pdev->dev, &dum->gadget);
|
|
if (rc < 0)
|
|
goto err_udc;
|
|
|
|
rc = device_create_file(&dum->gadget.dev, &dev_attr_function);
|
|
if (rc < 0)
|
|
goto err_dev;
|
|
platform_set_drvdata(pdev, dum);
|
|
return rc;
|
|
|
|
err_dev:
|
|
usb_del_gadget_udc(&dum->gadget);
|
|
err_udc:
|
|
return rc;
|
|
}
|
|
|
|
static int dummy_udc_remove(struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum = platform_get_drvdata(pdev);
|
|
|
|
device_remove_file(&dum->gadget.dev, &dev_attr_function);
|
|
usb_del_gadget_udc(&dum->gadget);
|
|
return 0;
|
|
}
|
|
|
|
static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
|
|
int suspend)
|
|
{
|
|
spin_lock_irq(&dum->lock);
|
|
dum->udc_suspended = suspend;
|
|
set_link_state(dum_hcd);
|
|
spin_unlock_irq(&dum->lock);
|
|
}
|
|
|
|
static int dummy_udc_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct dummy *dum = platform_get_drvdata(pdev);
|
|
struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
|
|
|
|
dev_dbg(&pdev->dev, "%s\n", __func__);
|
|
dummy_udc_pm(dum, dum_hcd, 1);
|
|
usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_udc_resume(struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum = platform_get_drvdata(pdev);
|
|
struct dummy_hcd *dum_hcd = gadget_to_dummy_hcd(&dum->gadget);
|
|
|
|
dev_dbg(&pdev->dev, "%s\n", __func__);
|
|
dummy_udc_pm(dum, dum_hcd, 0);
|
|
usb_hcd_poll_rh_status(dummy_hcd_to_hcd(dum_hcd));
|
|
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,
|
|
},
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static unsigned int dummy_get_ep_idx(const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
unsigned int index;
|
|
|
|
index = usb_endpoint_num(desc) << 1;
|
|
if (usb_endpoint_dir_in(desc))
|
|
index |= 1;
|
|
return index;
|
|
}
|
|
|
|
/* 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_ep_stream_en(struct dummy_hcd *dum_hcd, struct urb *urb)
|
|
{
|
|
const struct usb_endpoint_descriptor *desc = &urb->ep->desc;
|
|
u32 index;
|
|
|
|
if (!usb_endpoint_xfer_bulk(desc))
|
|
return 0;
|
|
|
|
index = dummy_get_ep_idx(desc);
|
|
return (1 << index) & dum_hcd->stream_en_ep;
|
|
}
|
|
|
|
/*
|
|
* The max stream number is saved as a nibble so for the 30 possible endpoints
|
|
* we only 15 bytes of memory. Therefore we are limited to max 16 streams (0
|
|
* means we use only 1 stream). The maximum according to the spec is 16bit so
|
|
* if the 16 stream limit is about to go, the array size should be incremented
|
|
* to 30 elements of type u16.
|
|
*/
|
|
static int get_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
|
|
unsigned int pipe)
|
|
{
|
|
int max_streams;
|
|
|
|
max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
|
|
if (usb_pipeout(pipe))
|
|
max_streams >>= 4;
|
|
else
|
|
max_streams &= 0xf;
|
|
max_streams++;
|
|
return max_streams;
|
|
}
|
|
|
|
static void set_max_streams_for_pipe(struct dummy_hcd *dum_hcd,
|
|
unsigned int pipe, unsigned int streams)
|
|
{
|
|
int max_streams;
|
|
|
|
streams--;
|
|
max_streams = dum_hcd->num_stream[usb_pipeendpoint(pipe)];
|
|
if (usb_pipeout(pipe)) {
|
|
streams <<= 4;
|
|
max_streams &= 0xf;
|
|
} else {
|
|
max_streams &= 0xf0;
|
|
}
|
|
max_streams |= streams;
|
|
dum_hcd->num_stream[usb_pipeendpoint(pipe)] = max_streams;
|
|
}
|
|
|
|
static int dummy_validate_stream(struct dummy_hcd *dum_hcd, struct urb *urb)
|
|
{
|
|
unsigned int max_streams;
|
|
int enabled;
|
|
|
|
enabled = dummy_ep_stream_en(dum_hcd, urb);
|
|
if (!urb->stream_id) {
|
|
if (enabled)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
if (!enabled)
|
|
return -EINVAL;
|
|
|
|
max_streams = get_max_streams_for_pipe(dum_hcd,
|
|
usb_pipeendpoint(urb->pipe));
|
|
if (urb->stream_id > max_streams) {
|
|
dev_err(dummy_dev(dum_hcd), "Stream id %d is out of range.\n",
|
|
urb->stream_id);
|
|
BUG();
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_urb_enqueue(
|
|
struct usb_hcd *hcd,
|
|
struct urb *urb,
|
|
gfp_t mem_flags
|
|
) {
|
|
struct dummy_hcd *dum_hcd;
|
|
struct urbp *urbp;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
urbp = kmalloc(sizeof *urbp, mem_flags);
|
|
if (!urbp)
|
|
return -ENOMEM;
|
|
urbp->urb = urb;
|
|
urbp->miter_started = 0;
|
|
|
|
dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
|
|
rc = dummy_validate_stream(dum_hcd, urb);
|
|
if (rc) {
|
|
kfree(urbp);
|
|
goto done;
|
|
}
|
|
|
|
rc = usb_hcd_link_urb_to_ep(hcd, urb);
|
|
if (rc) {
|
|
kfree(urbp);
|
|
goto done;
|
|
}
|
|
|
|
if (!dum_hcd->udev) {
|
|
dum_hcd->udev = urb->dev;
|
|
usb_get_dev(dum_hcd->udev);
|
|
} else if (unlikely(dum_hcd->udev != urb->dev))
|
|
dev_err(dummy_dev(dum_hcd), "usb_device address has changed!\n");
|
|
|
|
list_add_tail(&urbp->urbp_list, &dum_hcd->urbp_list);
|
|
urb->hcpriv = urbp;
|
|
if (!dum_hcd->next_frame_urbp)
|
|
dum_hcd->next_frame_urbp = 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_hcd->timer))
|
|
mod_timer(&dum_hcd->timer, jiffies + 1);
|
|
|
|
done:
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
return rc;
|
|
}
|
|
|
|
static int dummy_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
|
|
{
|
|
struct dummy_hcd *dum_hcd;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
/* giveback happens automatically in timer callback,
|
|
* so make sure the callback happens */
|
|
dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
|
|
rc = usb_hcd_check_unlink_urb(hcd, urb, status);
|
|
if (!rc && dum_hcd->rh_state != DUMMY_RH_RUNNING &&
|
|
!list_empty(&dum_hcd->urbp_list))
|
|
mod_timer(&dum_hcd->timer, jiffies);
|
|
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
return rc;
|
|
}
|
|
|
|
static int dummy_perform_transfer(struct urb *urb, struct dummy_request *req,
|
|
u32 len)
|
|
{
|
|
void *ubuf, *rbuf;
|
|
struct urbp *urbp = urb->hcpriv;
|
|
int to_host;
|
|
struct sg_mapping_iter *miter = &urbp->miter;
|
|
u32 trans = 0;
|
|
u32 this_sg;
|
|
bool next_sg;
|
|
|
|
to_host = usb_urb_dir_in(urb);
|
|
rbuf = req->req.buf + req->req.actual;
|
|
|
|
if (!urb->num_sgs) {
|
|
ubuf = urb->transfer_buffer + urb->actual_length;
|
|
if (to_host)
|
|
memcpy(ubuf, rbuf, len);
|
|
else
|
|
memcpy(rbuf, ubuf, len);
|
|
return len;
|
|
}
|
|
|
|
if (!urbp->miter_started) {
|
|
u32 flags = SG_MITER_ATOMIC;
|
|
|
|
if (to_host)
|
|
flags |= SG_MITER_TO_SG;
|
|
else
|
|
flags |= SG_MITER_FROM_SG;
|
|
|
|
sg_miter_start(miter, urb->sg, urb->num_sgs, flags);
|
|
urbp->miter_started = 1;
|
|
}
|
|
next_sg = sg_miter_next(miter);
|
|
if (next_sg == false) {
|
|
WARN_ON_ONCE(1);
|
|
return -EINVAL;
|
|
}
|
|
do {
|
|
ubuf = miter->addr;
|
|
this_sg = min_t(u32, len, miter->length);
|
|
miter->consumed = this_sg;
|
|
trans += this_sg;
|
|
|
|
if (to_host)
|
|
memcpy(ubuf, rbuf, this_sg);
|
|
else
|
|
memcpy(rbuf, ubuf, this_sg);
|
|
len -= this_sg;
|
|
|
|
if (!len)
|
|
break;
|
|
next_sg = sg_miter_next(miter);
|
|
if (next_sg == false) {
|
|
WARN_ON_ONCE(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
rbuf += this_sg;
|
|
} while (1);
|
|
|
|
sg_miter_stop(miter);
|
|
return trans;
|
|
}
|
|
|
|
/* transfer up to a frame's worth; caller must own lock */
|
|
static int transfer(struct dummy_hcd *dum_hcd, struct urb *urb,
|
|
struct dummy_ep *ep, int limit, int *status)
|
|
{
|
|
struct dummy *dum = dum_hcd->dum;
|
|
struct dummy_request *req;
|
|
int sent = 0;
|
|
|
|
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;
|
|
|
|
if (dummy_ep_stream_en(dum_hcd, urb)) {
|
|
if ((urb->stream_id != req->req.stream_id))
|
|
continue;
|
|
}
|
|
|
|
/* 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_urb_dir_in(urb);
|
|
if (unlikely(len == 0))
|
|
is_short = 1;
|
|
else {
|
|
/* not enough bandwidth left? */
|
|
if (limit < ep->ep.maxpacket && limit < len)
|
|
break;
|
|
len = min_t(unsigned, len, limit);
|
|
if (len == 0)
|
|
break;
|
|
|
|
/* send multiple of maxpacket first, then remainder */
|
|
if (len >= ep->ep.maxpacket) {
|
|
is_short = 0;
|
|
if (len % ep->ep.maxpacket)
|
|
rescan = 1;
|
|
len -= len % ep->ep.maxpacket;
|
|
} else {
|
|
is_short = 1;
|
|
}
|
|
|
|
len = dummy_perform_transfer(urb, req, len);
|
|
|
|
ep->last_io = jiffies;
|
|
if ((int)len < 0) {
|
|
req->req.status = len;
|
|
} else {
|
|
limit -= len;
|
|
sent += 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.
|
|
*/
|
|
if (is_short) {
|
|
if (host_len == dev_len) {
|
|
req->req.status = 0;
|
|
*status = 0;
|
|
} else if (to_host) {
|
|
req->req.status = 0;
|
|
if (dev_len > host_len)
|
|
*status = -EOVERFLOW;
|
|
else
|
|
*status = 0;
|
|
} else {
|
|
*status = 0;
|
|
if (host_len > dev_len)
|
|
req->req.status = -EOVERFLOW;
|
|
else
|
|
req->req.status = 0;
|
|
}
|
|
|
|
/*
|
|
* many requests terminate without a short packet.
|
|
* send a zlp if demanded by flags.
|
|
*/
|
|
} else {
|
|
if (req->req.length == req->req.actual) {
|
|
if (req->req.zero && to_host)
|
|
rescan = 1;
|
|
else
|
|
req->req.status = 0;
|
|
}
|
|
if (urb->transfer_buffer_length == urb->actual_length) {
|
|
if (urb->transfer_flags & URB_ZERO_PACKET &&
|
|
!to_host)
|
|
rescan = 1;
|
|
else
|
|
*status = 0;
|
|
}
|
|
}
|
|
|
|
/* device side completion --> continuable */
|
|
if (req->req.status != -EINPROGRESS) {
|
|
list_del_init(&req->queue);
|
|
|
|
spin_unlock(&dum->lock);
|
|
usb_gadget_giveback_request(&ep->ep, &req->req);
|
|
spin_lock(&dum->lock);
|
|
|
|
/* requests might have been unlinked... */
|
|
rescan = 1;
|
|
}
|
|
|
|
/* host side completion --> terminate */
|
|
if (*status != -EINPROGRESS)
|
|
break;
|
|
|
|
/* rescan to continue with any other queued i/o */
|
|
if (rescan)
|
|
goto top;
|
|
}
|
|
return sent;
|
|
}
|
|
|
|
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 = usb_endpoint_maxp_mult(ep->desc);
|
|
tmp *= 8 /* applies to entire frame */;
|
|
limit += limit * tmp;
|
|
}
|
|
if (dum->gadget.speed == USB_SPEED_SUPER) {
|
|
switch (usb_endpoint_type(ep->desc)) {
|
|
case USB_ENDPOINT_XFER_ISOC:
|
|
/* Sec. 4.4.8.2 USB3.0 Spec */
|
|
limit = 3 * 16 * 1024 * 8;
|
|
break;
|
|
case USB_ENDPOINT_XFER_INT:
|
|
/* Sec. 4.4.7.2 USB3.0 Spec */
|
|
limit = 3 * 1024 * 8;
|
|
break;
|
|
case USB_ENDPOINT_XFER_BULK:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return limit;
|
|
}
|
|
|
|
#define is_active(dum_hcd) ((dum_hcd->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->gadget.speed == USB_SPEED_SUPER ?
|
|
dum->ss_hcd : dum->hs_hcd)))
|
|
return NULL;
|
|
if (!dum->ints_enabled)
|
|
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)
|
|
|
|
|
|
/**
|
|
* handle_control_request() - handles all control transfers
|
|
* @dum: pointer to dummy (the_controller)
|
|
* @urb: the urb request to handle
|
|
* @setup: pointer to the setup data for a USB device control
|
|
* request
|
|
* @status: pointer to request handling status
|
|
*
|
|
* Return 0 - if the request was handled
|
|
* 1 - if the request wasn't handles
|
|
* error code on error
|
|
*/
|
|
static int handle_control_request(struct dummy_hcd *dum_hcd, struct urb *urb,
|
|
struct usb_ctrlrequest *setup,
|
|
int *status)
|
|
{
|
|
struct dummy_ep *ep2;
|
|
struct dummy *dum = dum_hcd->dum;
|
|
int ret_val = 1;
|
|
unsigned w_index;
|
|
unsigned w_value;
|
|
|
|
w_index = le16_to_cpu(setup->wIndex);
|
|
w_value = le16_to_cpu(setup->wValue);
|
|
switch (setup->bRequest) {
|
|
case USB_REQ_SET_ADDRESS:
|
|
if (setup->bRequestType != Dev_Request)
|
|
break;
|
|
dum->address = w_value;
|
|
*status = 0;
|
|
dev_dbg(udc_dev(dum), "set_address = %d\n",
|
|
w_value);
|
|
ret_val = 0;
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
if (setup->bRequestType == Dev_Request) {
|
|
ret_val = 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;
|
|
case USB_DEVICE_U1_ENABLE:
|
|
if (dummy_hcd_to_hcd(dum_hcd)->speed ==
|
|
HCD_USB3)
|
|
w_value = USB_DEV_STAT_U1_ENABLED;
|
|
else
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
case USB_DEVICE_U2_ENABLE:
|
|
if (dummy_hcd_to_hcd(dum_hcd)->speed ==
|
|
HCD_USB3)
|
|
w_value = USB_DEV_STAT_U2_ENABLED;
|
|
else
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
case USB_DEVICE_LTM_ENABLE:
|
|
if (dummy_hcd_to_hcd(dum_hcd)->speed ==
|
|
HCD_USB3)
|
|
w_value = USB_DEV_STAT_LTM_ENABLED;
|
|
else
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
default:
|
|
ret_val = -EOPNOTSUPP;
|
|
}
|
|
if (ret_val == 0) {
|
|
dum->devstatus |= (1 << w_value);
|
|
*status = 0;
|
|
}
|
|
} else if (setup->bRequestType == Ep_Request) {
|
|
/* endpoint halt */
|
|
ep2 = find_endpoint(dum, w_index);
|
|
if (!ep2 || ep2->ep.name == ep0name) {
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
ep2->halted = 1;
|
|
ret_val = 0;
|
|
*status = 0;
|
|
}
|
|
break;
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
if (setup->bRequestType == Dev_Request) {
|
|
ret_val = 0;
|
|
switch (w_value) {
|
|
case USB_DEVICE_REMOTE_WAKEUP:
|
|
w_value = USB_DEVICE_REMOTE_WAKEUP;
|
|
break;
|
|
case USB_DEVICE_U1_ENABLE:
|
|
if (dummy_hcd_to_hcd(dum_hcd)->speed ==
|
|
HCD_USB3)
|
|
w_value = USB_DEV_STAT_U1_ENABLED;
|
|
else
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
case USB_DEVICE_U2_ENABLE:
|
|
if (dummy_hcd_to_hcd(dum_hcd)->speed ==
|
|
HCD_USB3)
|
|
w_value = USB_DEV_STAT_U2_ENABLED;
|
|
else
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
case USB_DEVICE_LTM_ENABLE:
|
|
if (dummy_hcd_to_hcd(dum_hcd)->speed ==
|
|
HCD_USB3)
|
|
w_value = USB_DEV_STAT_LTM_ENABLED;
|
|
else
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
default:
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
if (ret_val == 0) {
|
|
dum->devstatus &= ~(1 << w_value);
|
|
*status = 0;
|
|
}
|
|
} else if (setup->bRequestType == Ep_Request) {
|
|
/* endpoint halt */
|
|
ep2 = find_endpoint(dum, w_index);
|
|
if (!ep2) {
|
|
ret_val = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
if (!ep2->wedged)
|
|
ep2->halted = 0;
|
|
ret_val = 0;
|
|
*status = 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) {
|
|
ret_val = -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_t(u32, 2,
|
|
urb->transfer_buffer_length);
|
|
ret_val = 0;
|
|
*status = 0;
|
|
}
|
|
break;
|
|
}
|
|
return ret_val;
|
|
}
|
|
|
|
/* drive both sides of the transfers; looks like irq handlers to
|
|
* both drivers except the callbacks aren't in_irq().
|
|
*/
|
|
static void dummy_timer(struct timer_list *t)
|
|
{
|
|
struct dummy_hcd *dum_hcd = from_timer(dum_hcd, t, timer);
|
|
struct dummy *dum = dum_hcd->dum;
|
|
struct urbp *urbp, *tmp;
|
|
unsigned long flags;
|
|
int limit, total;
|
|
int i;
|
|
|
|
/* simplistic model for one frame's bandwidth */
|
|
/* FIXME: account for transaction and packet overhead */
|
|
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;
|
|
case USB_SPEED_SUPER:
|
|
/* Bus speed is 500000 bytes/ms, so use a little less */
|
|
total = 490000;
|
|
break;
|
|
default: /* Can't happen */
|
|
dev_err(dummy_dev(dum_hcd), "bogus device speed\n");
|
|
total = 0;
|
|
break;
|
|
}
|
|
|
|
/* 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_hcd->udev) {
|
|
dev_err(dummy_dev(dum_hcd),
|
|
"timer fired with no URBs pending?\n");
|
|
spin_unlock_irqrestore(&dum->lock, flags);
|
|
return;
|
|
}
|
|
dum_hcd->next_frame_urbp = NULL;
|
|
|
|
for (i = 0; i < DUMMY_ENDPOINTS; i++) {
|
|
if (!ep_info[i].name)
|
|
break;
|
|
dum->ep[i].already_seen = 0;
|
|
}
|
|
|
|
restart:
|
|
list_for_each_entry_safe(urbp, tmp, &dum_hcd->urbp_list, urbp_list) {
|
|
struct urb *urb;
|
|
struct dummy_request *req;
|
|
u8 address;
|
|
struct dummy_ep *ep = NULL;
|
|
int status = -EINPROGRESS;
|
|
|
|
/* stop when we reach URBs queued after the timer interrupt */
|
|
if (urbp == dum_hcd->next_frame_urbp)
|
|
break;
|
|
|
|
urb = urbp->urb;
|
|
if (urb->unlinked)
|
|
goto return_urb;
|
|
else if (dum_hcd->rh_state != DUMMY_RH_RUNNING)
|
|
continue;
|
|
|
|
/* Used up this frame's bandwidth? */
|
|
if (total <= 0)
|
|
continue;
|
|
|
|
/* find the gadget's ep for this request (if configured) */
|
|
address = usb_pipeendpoint (urb->pipe);
|
|
if (usb_urb_dir_in(urb))
|
|
address |= USB_DIR_IN;
|
|
ep = find_endpoint(dum, address);
|
|
if (!ep) {
|
|
/* set_configuration() disagreement */
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"no ep configured for urb %p\n",
|
|
urb);
|
|
status = -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_hcd), "ep %s halted, urb %p\n",
|
|
ep->ep.name, urb);
|
|
status = -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;
|
|
|
|
setup = *(struct usb_ctrlrequest *) urb->setup_packet;
|
|
/* 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);
|
|
usb_gadget_giveback_request(&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;
|
|
|
|
value = handle_control_request(dum_hcd, urb, &setup,
|
|
&status);
|
|
|
|
/* gadget driver handles all other requests. block
|
|
* until setup() returns; no reentrancy issues etc.
|
|
*/
|
|
if (value > 0) {
|
|
++dum->callback_usage;
|
|
spin_unlock(&dum->lock);
|
|
value = dum->driver->setup(&dum->gadget,
|
|
&setup);
|
|
spin_lock(&dum->lock);
|
|
--dum->callback_usage;
|
|
|
|
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);
|
|
status = -EPIPE;
|
|
urb->actual_length = 0;
|
|
}
|
|
|
|
goto return_urb;
|
|
}
|
|
|
|
/* non-control requests */
|
|
limit = total;
|
|
switch (usb_pipetype(urb->pipe)) {
|
|
case PIPE_ISOCHRONOUS:
|
|
/*
|
|
* We don't support isochronous. But if we did,
|
|
* here are some of the issues we'd have to face:
|
|
*
|
|
* 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));
|
|
status = -EINVAL; /* fail all xfers */
|
|
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 */
|
|
|
|
default:
|
|
treat_control_like_bulk:
|
|
ep->last_io = jiffies;
|
|
total -= transfer(dum_hcd, urb, ep, limit, &status);
|
|
break;
|
|
}
|
|
|
|
/* incomplete transfer? */
|
|
if (status == -EINPROGRESS)
|
|
continue;
|
|
|
|
return_urb:
|
|
list_del(&urbp->urbp_list);
|
|
kfree(urbp);
|
|
if (ep)
|
|
ep->already_seen = ep->setup_stage = 0;
|
|
|
|
usb_hcd_unlink_urb_from_ep(dummy_hcd_to_hcd(dum_hcd), urb);
|
|
spin_unlock(&dum->lock);
|
|
usb_hcd_giveback_urb(dummy_hcd_to_hcd(dum_hcd), urb, status);
|
|
spin_lock(&dum->lock);
|
|
|
|
goto restart;
|
|
}
|
|
|
|
if (list_empty(&dum_hcd->urbp_list)) {
|
|
usb_put_dev(dum_hcd->udev);
|
|
dum_hcd->udev = NULL;
|
|
} else if (dum_hcd->rh_state == DUMMY_RH_RUNNING) {
|
|
/* want a 1 msec delay here */
|
|
mod_timer(&dum_hcd->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_hcd *dum_hcd;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
|
|
dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
if (!HCD_HW_ACCESSIBLE(hcd))
|
|
goto done;
|
|
|
|
if (dum_hcd->resuming && time_after_eq(jiffies, dum_hcd->re_timeout)) {
|
|
dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
|
|
dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
|
|
set_link_state(dum_hcd);
|
|
}
|
|
|
|
if ((dum_hcd->port_status & PORT_C_MASK) != 0) {
|
|
*buf = (1 << 1);
|
|
dev_dbg(dummy_dev(dum_hcd), "port status 0x%08x has changes\n",
|
|
dum_hcd->port_status);
|
|
retval = 1;
|
|
if (dum_hcd->rh_state == DUMMY_RH_SUSPENDED)
|
|
usb_hcd_resume_root_hub(hcd);
|
|
}
|
|
done:
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
/* usb 3.0 root hub device descriptor */
|
|
static struct {
|
|
struct usb_bos_descriptor bos;
|
|
struct usb_ss_cap_descriptor ss_cap;
|
|
} __packed usb3_bos_desc = {
|
|
|
|
.bos = {
|
|
.bLength = USB_DT_BOS_SIZE,
|
|
.bDescriptorType = USB_DT_BOS,
|
|
.wTotalLength = cpu_to_le16(sizeof(usb3_bos_desc)),
|
|
.bNumDeviceCaps = 1,
|
|
},
|
|
.ss_cap = {
|
|
.bLength = USB_DT_USB_SS_CAP_SIZE,
|
|
.bDescriptorType = USB_DT_DEVICE_CAPABILITY,
|
|
.bDevCapabilityType = USB_SS_CAP_TYPE,
|
|
.wSpeedSupported = cpu_to_le16(USB_5GBPS_OPERATION),
|
|
.bFunctionalitySupport = ilog2(USB_5GBPS_OPERATION),
|
|
},
|
|
};
|
|
|
|
static inline void
|
|
ss_hub_descriptor(struct usb_hub_descriptor *desc)
|
|
{
|
|
memset(desc, 0, sizeof *desc);
|
|
desc->bDescriptorType = USB_DT_SS_HUB;
|
|
desc->bDescLength = 12;
|
|
desc->wHubCharacteristics = cpu_to_le16(
|
|
HUB_CHAR_INDV_PORT_LPSM |
|
|
HUB_CHAR_COMMON_OCPM);
|
|
desc->bNbrPorts = 1;
|
|
desc->u.ss.bHubHdrDecLat = 0x04; /* Worst case: 0.4 micro sec*/
|
|
desc->u.ss.DeviceRemovable = 0;
|
|
}
|
|
|
|
static inline void hub_descriptor(struct usb_hub_descriptor *desc)
|
|
{
|
|
memset(desc, 0, sizeof *desc);
|
|
desc->bDescriptorType = USB_DT_HUB;
|
|
desc->bDescLength = 9;
|
|
desc->wHubCharacteristics = cpu_to_le16(
|
|
HUB_CHAR_INDV_PORT_LPSM |
|
|
HUB_CHAR_COMMON_OCPM);
|
|
desc->bNbrPorts = 1;
|
|
desc->u.hs.DeviceRemovable[0] = 0;
|
|
desc->u.hs.DeviceRemovable[1] = 0xff; /* PortPwrCtrlMask */
|
|
}
|
|
|
|
static int dummy_hub_control(
|
|
struct usb_hcd *hcd,
|
|
u16 typeReq,
|
|
u16 wValue,
|
|
u16 wIndex,
|
|
char *buf,
|
|
u16 wLength
|
|
) {
|
|
struct dummy_hcd *dum_hcd;
|
|
int retval = 0;
|
|
unsigned long flags;
|
|
|
|
if (!HCD_HW_ACCESSIBLE(hcd))
|
|
return -ETIMEDOUT;
|
|
|
|
dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
switch (typeReq) {
|
|
case ClearHubFeature:
|
|
break;
|
|
case ClearPortFeature:
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
if (hcd->speed == HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"USB_PORT_FEAT_SUSPEND req not "
|
|
"supported for USB 3.0 roothub\n");
|
|
goto error;
|
|
}
|
|
if (dum_hcd->port_status & USB_PORT_STAT_SUSPEND) {
|
|
/* 20msec resume signaling */
|
|
dum_hcd->resuming = 1;
|
|
dum_hcd->re_timeout = jiffies +
|
|
msecs_to_jiffies(20);
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
dev_dbg(dummy_dev(dum_hcd), "power-off\n");
|
|
if (hcd->speed == HCD_USB3)
|
|
dum_hcd->port_status &= ~USB_SS_PORT_STAT_POWER;
|
|
else
|
|
dum_hcd->port_status &= ~USB_PORT_STAT_POWER;
|
|
set_link_state(dum_hcd);
|
|
break;
|
|
default:
|
|
dum_hcd->port_status &= ~(1 << wValue);
|
|
set_link_state(dum_hcd);
|
|
}
|
|
break;
|
|
case GetHubDescriptor:
|
|
if (hcd->speed == HCD_USB3 &&
|
|
(wLength < USB_DT_SS_HUB_SIZE ||
|
|
wValue != (USB_DT_SS_HUB << 8))) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"Wrong hub descriptor type for "
|
|
"USB 3.0 roothub.\n");
|
|
goto error;
|
|
}
|
|
if (hcd->speed == HCD_USB3)
|
|
ss_hub_descriptor((struct usb_hub_descriptor *) buf);
|
|
else
|
|
hub_descriptor((struct usb_hub_descriptor *) buf);
|
|
break;
|
|
|
|
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
|
|
if (hcd->speed != HCD_USB3)
|
|
goto error;
|
|
|
|
if ((wValue >> 8) != USB_DT_BOS)
|
|
goto error;
|
|
|
|
memcpy(buf, &usb3_bos_desc, sizeof(usb3_bos_desc));
|
|
retval = sizeof(usb3_bos_desc);
|
|
break;
|
|
|
|
case GetHubStatus:
|
|
*(__le32 *) buf = cpu_to_le32(0);
|
|
break;
|
|
case GetPortStatus:
|
|
if (wIndex != 1)
|
|
retval = -EPIPE;
|
|
|
|
/* whoever resets or resumes must GetPortStatus to
|
|
* complete it!!
|
|
*/
|
|
if (dum_hcd->resuming &&
|
|
time_after_eq(jiffies, dum_hcd->re_timeout)) {
|
|
dum_hcd->port_status |= (USB_PORT_STAT_C_SUSPEND << 16);
|
|
dum_hcd->port_status &= ~USB_PORT_STAT_SUSPEND;
|
|
}
|
|
if ((dum_hcd->port_status & USB_PORT_STAT_RESET) != 0 &&
|
|
time_after_eq(jiffies, dum_hcd->re_timeout)) {
|
|
dum_hcd->port_status |= (USB_PORT_STAT_C_RESET << 16);
|
|
dum_hcd->port_status &= ~USB_PORT_STAT_RESET;
|
|
if (dum_hcd->dum->pullup) {
|
|
dum_hcd->port_status |= USB_PORT_STAT_ENABLE;
|
|
|
|
if (hcd->speed < HCD_USB3) {
|
|
switch (dum_hcd->dum->gadget.speed) {
|
|
case USB_SPEED_HIGH:
|
|
dum_hcd->port_status |=
|
|
USB_PORT_STAT_HIGH_SPEED;
|
|
break;
|
|
case USB_SPEED_LOW:
|
|
dum_hcd->dum->gadget.ep0->
|
|
maxpacket = 8;
|
|
dum_hcd->port_status |=
|
|
USB_PORT_STAT_LOW_SPEED;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
set_link_state(dum_hcd);
|
|
((__le16 *) buf)[0] = cpu_to_le16(dum_hcd->port_status);
|
|
((__le16 *) buf)[1] = cpu_to_le16(dum_hcd->port_status >> 16);
|
|
break;
|
|
case SetHubFeature:
|
|
retval = -EPIPE;
|
|
break;
|
|
case SetPortFeature:
|
|
switch (wValue) {
|
|
case USB_PORT_FEAT_LINK_STATE:
|
|
if (hcd->speed != HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"USB_PORT_FEAT_LINK_STATE req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
/*
|
|
* Since this is dummy we don't have an actual link so
|
|
* there is nothing to do for the SET_LINK_STATE cmd
|
|
*/
|
|
break;
|
|
case USB_PORT_FEAT_U1_TIMEOUT:
|
|
case USB_PORT_FEAT_U2_TIMEOUT:
|
|
/* TODO: add suspend/resume support! */
|
|
if (hcd->speed != HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"USB_PORT_FEAT_U1/2_TIMEOUT req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_SUSPEND:
|
|
/* Applicable only for USB2.0 hub */
|
|
if (hcd->speed == HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"USB_PORT_FEAT_SUSPEND req not "
|
|
"supported for USB 3.0 roothub\n");
|
|
goto error;
|
|
}
|
|
if (dum_hcd->active) {
|
|
dum_hcd->port_status |= USB_PORT_STAT_SUSPEND;
|
|
|
|
/* HNP would happen here; for now we
|
|
* assume b_bus_req is always true.
|
|
*/
|
|
set_link_state(dum_hcd);
|
|
if (((1 << USB_DEVICE_B_HNP_ENABLE)
|
|
& dum_hcd->dum->devstatus) != 0)
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"no HNP yet!\n");
|
|
}
|
|
break;
|
|
case USB_PORT_FEAT_POWER:
|
|
if (hcd->speed == HCD_USB3)
|
|
dum_hcd->port_status |= USB_SS_PORT_STAT_POWER;
|
|
else
|
|
dum_hcd->port_status |= USB_PORT_STAT_POWER;
|
|
set_link_state(dum_hcd);
|
|
break;
|
|
case USB_PORT_FEAT_BH_PORT_RESET:
|
|
/* Applicable only for USB3.0 hub */
|
|
if (hcd->speed != HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"USB_PORT_FEAT_BH_PORT_RESET req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
/* FALLS THROUGH */
|
|
case USB_PORT_FEAT_RESET:
|
|
/* if it's already enabled, disable */
|
|
if (hcd->speed == HCD_USB3) {
|
|
dum_hcd->port_status = 0;
|
|
dum_hcd->port_status =
|
|
(USB_SS_PORT_STAT_POWER |
|
|
USB_PORT_STAT_CONNECTION |
|
|
USB_PORT_STAT_RESET);
|
|
} else
|
|
dum_hcd->port_status &= ~(USB_PORT_STAT_ENABLE
|
|
| USB_PORT_STAT_LOW_SPEED
|
|
| USB_PORT_STAT_HIGH_SPEED);
|
|
/*
|
|
* We want to reset device status. All but the
|
|
* Self powered feature
|
|
*/
|
|
dum_hcd->dum->devstatus &=
|
|
(1 << USB_DEVICE_SELF_POWERED);
|
|
/*
|
|
* FIXME USB3.0: what is the correct reset signaling
|
|
* interval? Is it still 50msec as for HS?
|
|
*/
|
|
dum_hcd->re_timeout = jiffies + msecs_to_jiffies(50);
|
|
/* FALLS THROUGH */
|
|
default:
|
|
if (hcd->speed == HCD_USB3) {
|
|
if ((dum_hcd->port_status &
|
|
USB_SS_PORT_STAT_POWER) != 0) {
|
|
dum_hcd->port_status |= (1 << wValue);
|
|
}
|
|
} else
|
|
if ((dum_hcd->port_status &
|
|
USB_PORT_STAT_POWER) != 0) {
|
|
dum_hcd->port_status |= (1 << wValue);
|
|
}
|
|
set_link_state(dum_hcd);
|
|
}
|
|
break;
|
|
case GetPortErrorCount:
|
|
if (hcd->speed != HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"GetPortErrorCount req not "
|
|
"supported for USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
/* We'll always return 0 since this is a dummy hub */
|
|
*(__le32 *) buf = cpu_to_le32(0);
|
|
break;
|
|
case SetHubDepth:
|
|
if (hcd->speed != HCD_USB3) {
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"SetHubDepth req not supported for "
|
|
"USB 2.0 roothub\n");
|
|
goto error;
|
|
}
|
|
break;
|
|
default:
|
|
dev_dbg(dummy_dev(dum_hcd),
|
|
"hub control req%04x v%04x i%04x l%d\n",
|
|
typeReq, wValue, wIndex, wLength);
|
|
error:
|
|
/* "protocol stall" on error */
|
|
retval = -EPIPE;
|
|
}
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
|
|
if ((dum_hcd->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_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
|
|
dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
|
|
|
|
spin_lock_irq(&dum_hcd->dum->lock);
|
|
dum_hcd->rh_state = DUMMY_RH_SUSPENDED;
|
|
set_link_state(dum_hcd);
|
|
hcd->state = HC_STATE_SUSPENDED;
|
|
spin_unlock_irq(&dum_hcd->dum->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_bus_resume(struct usb_hcd *hcd)
|
|
{
|
|
struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
int rc = 0;
|
|
|
|
dev_dbg(&hcd->self.root_hub->dev, "%s\n", __func__);
|
|
|
|
spin_lock_irq(&dum_hcd->dum->lock);
|
|
if (!HCD_HW_ACCESSIBLE(hcd)) {
|
|
rc = -ESHUTDOWN;
|
|
} else {
|
|
dum_hcd->rh_state = DUMMY_RH_RUNNING;
|
|
set_link_state(dum_hcd);
|
|
if (!list_empty(&dum_hcd->urbp_list))
|
|
mod_timer(&dum_hcd->timer, jiffies);
|
|
hcd->state = HC_STATE_RUNNING;
|
|
}
|
|
spin_unlock_irq(&dum_hcd->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 scnprintf(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;
|
|
case USB_SPEED_SUPER:
|
|
s = "ss";
|
|
break;
|
|
default:
|
|
s = "?";
|
|
break;
|
|
} s; }),
|
|
ep, ep ? (usb_urb_dir_in(urb) ? "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 urbs_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct usb_hcd *hcd = dev_get_drvdata(dev);
|
|
struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
struct urbp *urbp;
|
|
size_t size = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
list_for_each_entry(urbp, &dum_hcd->urbp_list, urbp_list) {
|
|
size_t temp;
|
|
|
|
temp = show_urb(buf, PAGE_SIZE - size, urbp->urb);
|
|
buf += temp;
|
|
size += temp;
|
|
}
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
|
|
return size;
|
|
}
|
|
static DEVICE_ATTR_RO(urbs);
|
|
|
|
static int dummy_start_ss(struct dummy_hcd *dum_hcd)
|
|
{
|
|
timer_setup(&dum_hcd->timer, dummy_timer, 0);
|
|
dum_hcd->rh_state = DUMMY_RH_RUNNING;
|
|
dum_hcd->stream_en_ep = 0;
|
|
INIT_LIST_HEAD(&dum_hcd->urbp_list);
|
|
dummy_hcd_to_hcd(dum_hcd)->power_budget = POWER_BUDGET_3;
|
|
dummy_hcd_to_hcd(dum_hcd)->state = HC_STATE_RUNNING;
|
|
dummy_hcd_to_hcd(dum_hcd)->uses_new_polling = 1;
|
|
#ifdef CONFIG_USB_OTG
|
|
dummy_hcd_to_hcd(dum_hcd)->self.otg_port = 1;
|
|
#endif
|
|
return 0;
|
|
|
|
/* FIXME 'urbs' should be a per-device thing, maybe in usbcore */
|
|
return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
|
|
}
|
|
|
|
static int dummy_start(struct usb_hcd *hcd)
|
|
{
|
|
struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(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.
|
|
*/
|
|
if (!usb_hcd_is_primary_hcd(hcd))
|
|
return dummy_start_ss(dum_hcd);
|
|
|
|
spin_lock_init(&dum_hcd->dum->lock);
|
|
timer_setup(&dum_hcd->timer, dummy_timer, 0);
|
|
dum_hcd->rh_state = DUMMY_RH_RUNNING;
|
|
|
|
INIT_LIST_HEAD(&dum_hcd->urbp_list);
|
|
|
|
hcd->power_budget = POWER_BUDGET;
|
|
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 */
|
|
return device_create_file(dummy_dev(dum_hcd), &dev_attr_urbs);
|
|
}
|
|
|
|
static void dummy_stop(struct usb_hcd *hcd)
|
|
{
|
|
device_remove_file(dummy_dev(hcd_to_dummy_hcd(hcd)), &dev_attr_urbs);
|
|
dev_info(dummy_dev(hcd_to_dummy_hcd(hcd)), "stopped\n");
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
|
|
static int dummy_h_get_frame(struct usb_hcd *hcd)
|
|
{
|
|
return dummy_g_get_frame(NULL);
|
|
}
|
|
|
|
static int dummy_setup(struct usb_hcd *hcd)
|
|
{
|
|
struct dummy *dum;
|
|
|
|
dum = *((void **)dev_get_platdata(hcd->self.controller));
|
|
hcd->self.sg_tablesize = ~0;
|
|
if (usb_hcd_is_primary_hcd(hcd)) {
|
|
dum->hs_hcd = hcd_to_dummy_hcd(hcd);
|
|
dum->hs_hcd->dum = dum;
|
|
/*
|
|
* Mark the first roothub as being USB 2.0.
|
|
* The USB 3.0 roothub will be registered later by
|
|
* dummy_hcd_probe()
|
|
*/
|
|
hcd->speed = HCD_USB2;
|
|
hcd->self.root_hub->speed = USB_SPEED_HIGH;
|
|
} else {
|
|
dum->ss_hcd = hcd_to_dummy_hcd(hcd);
|
|
dum->ss_hcd->dum = dum;
|
|
hcd->speed = HCD_USB3;
|
|
hcd->self.root_hub->speed = USB_SPEED_SUPER;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Change a group of bulk endpoints to support multiple stream IDs */
|
|
static int dummy_alloc_streams(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint **eps, unsigned int num_eps,
|
|
unsigned int num_streams, gfp_t mem_flags)
|
|
{
|
|
struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
unsigned long flags;
|
|
int max_stream;
|
|
int ret_streams = num_streams;
|
|
unsigned int index;
|
|
unsigned int i;
|
|
|
|
if (!num_eps)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
for (i = 0; i < num_eps; i++) {
|
|
index = dummy_get_ep_idx(&eps[i]->desc);
|
|
if ((1 << index) & dum_hcd->stream_en_ep) {
|
|
ret_streams = -EINVAL;
|
|
goto out;
|
|
}
|
|
max_stream = usb_ss_max_streams(&eps[i]->ss_ep_comp);
|
|
if (!max_stream) {
|
|
ret_streams = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (max_stream < ret_streams) {
|
|
dev_dbg(dummy_dev(dum_hcd), "Ep 0x%x only supports %u "
|
|
"stream IDs.\n",
|
|
eps[i]->desc.bEndpointAddress,
|
|
max_stream);
|
|
ret_streams = max_stream;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < num_eps; i++) {
|
|
index = dummy_get_ep_idx(&eps[i]->desc);
|
|
dum_hcd->stream_en_ep |= 1 << index;
|
|
set_max_streams_for_pipe(dum_hcd,
|
|
usb_endpoint_num(&eps[i]->desc), ret_streams);
|
|
}
|
|
out:
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
return ret_streams;
|
|
}
|
|
|
|
/* Reverts a group of bulk endpoints back to not using stream IDs. */
|
|
static int dummy_free_streams(struct usb_hcd *hcd, struct usb_device *udev,
|
|
struct usb_host_endpoint **eps, unsigned int num_eps,
|
|
gfp_t mem_flags)
|
|
{
|
|
struct dummy_hcd *dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
unsigned long flags;
|
|
int ret;
|
|
unsigned int index;
|
|
unsigned int i;
|
|
|
|
spin_lock_irqsave(&dum_hcd->dum->lock, flags);
|
|
for (i = 0; i < num_eps; i++) {
|
|
index = dummy_get_ep_idx(&eps[i]->desc);
|
|
if (!((1 << index) & dum_hcd->stream_en_ep)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < num_eps; i++) {
|
|
index = dummy_get_ep_idx(&eps[i]->desc);
|
|
dum_hcd->stream_en_ep &= ~(1 << index);
|
|
set_max_streams_for_pipe(dum_hcd,
|
|
usb_endpoint_num(&eps[i]->desc), 0);
|
|
}
|
|
ret = 0;
|
|
out:
|
|
spin_unlock_irqrestore(&dum_hcd->dum->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static struct hc_driver dummy_hcd = {
|
|
.description = (char *) driver_name,
|
|
.product_desc = "Dummy host controller",
|
|
.hcd_priv_size = sizeof(struct dummy_hcd),
|
|
|
|
.reset = dummy_setup,
|
|
.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,
|
|
|
|
.alloc_streams = dummy_alloc_streams,
|
|
.free_streams = dummy_free_streams,
|
|
};
|
|
|
|
static int dummy_hcd_probe(struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum;
|
|
struct usb_hcd *hs_hcd;
|
|
struct usb_hcd *ss_hcd;
|
|
int retval;
|
|
|
|
dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n", driver_desc);
|
|
dum = *((void **)dev_get_platdata(&pdev->dev));
|
|
|
|
if (mod_data.is_super_speed)
|
|
dummy_hcd.flags = HCD_USB3 | HCD_SHARED;
|
|
else if (mod_data.is_high_speed)
|
|
dummy_hcd.flags = HCD_USB2;
|
|
else
|
|
dummy_hcd.flags = HCD_USB11;
|
|
hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev->dev));
|
|
if (!hs_hcd)
|
|
return -ENOMEM;
|
|
hs_hcd->has_tt = 1;
|
|
|
|
retval = usb_add_hcd(hs_hcd, 0, 0);
|
|
if (retval)
|
|
goto put_usb2_hcd;
|
|
|
|
if (mod_data.is_super_speed) {
|
|
ss_hcd = usb_create_shared_hcd(&dummy_hcd, &pdev->dev,
|
|
dev_name(&pdev->dev), hs_hcd);
|
|
if (!ss_hcd) {
|
|
retval = -ENOMEM;
|
|
goto dealloc_usb2_hcd;
|
|
}
|
|
|
|
retval = usb_add_hcd(ss_hcd, 0, 0);
|
|
if (retval)
|
|
goto put_usb3_hcd;
|
|
}
|
|
return 0;
|
|
|
|
put_usb3_hcd:
|
|
usb_put_hcd(ss_hcd);
|
|
dealloc_usb2_hcd:
|
|
usb_remove_hcd(hs_hcd);
|
|
put_usb2_hcd:
|
|
usb_put_hcd(hs_hcd);
|
|
dum->hs_hcd = dum->ss_hcd = NULL;
|
|
return retval;
|
|
}
|
|
|
|
static int dummy_hcd_remove(struct platform_device *pdev)
|
|
{
|
|
struct dummy *dum;
|
|
|
|
dum = hcd_to_dummy_hcd(platform_get_drvdata(pdev))->dum;
|
|
|
|
if (dum->ss_hcd) {
|
|
usb_remove_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
|
|
usb_put_hcd(dummy_hcd_to_hcd(dum->ss_hcd));
|
|
}
|
|
|
|
usb_remove_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
|
|
usb_put_hcd(dummy_hcd_to_hcd(dum->hs_hcd));
|
|
|
|
dum->hs_hcd = NULL;
|
|
dum->ss_hcd = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct usb_hcd *hcd;
|
|
struct dummy_hcd *dum_hcd;
|
|
int rc = 0;
|
|
|
|
dev_dbg(&pdev->dev, "%s\n", __func__);
|
|
|
|
hcd = platform_get_drvdata(pdev);
|
|
dum_hcd = hcd_to_dummy_hcd(hcd);
|
|
if (dum_hcd->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", __func__);
|
|
|
|
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,
|
|
},
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
#define MAX_NUM_UDC 32
|
|
static struct platform_device *the_udc_pdev[MAX_NUM_UDC];
|
|
static struct platform_device *the_hcd_pdev[MAX_NUM_UDC];
|
|
|
|
static int __init init(void)
|
|
{
|
|
int retval = -ENOMEM;
|
|
int i;
|
|
struct dummy *dum[MAX_NUM_UDC];
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
if (!mod_data.is_high_speed && mod_data.is_super_speed)
|
|
return -EINVAL;
|
|
|
|
if (mod_data.num < 1 || mod_data.num > MAX_NUM_UDC) {
|
|
pr_err("Number of emulated UDC must be in range of 1...%d\n",
|
|
MAX_NUM_UDC);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
the_hcd_pdev[i] = platform_device_alloc(driver_name, i);
|
|
if (!the_hcd_pdev[i]) {
|
|
i--;
|
|
while (i >= 0)
|
|
platform_device_put(the_hcd_pdev[i--]);
|
|
return retval;
|
|
}
|
|
}
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
the_udc_pdev[i] = platform_device_alloc(gadget_name, i);
|
|
if (!the_udc_pdev[i]) {
|
|
i--;
|
|
while (i >= 0)
|
|
platform_device_put(the_udc_pdev[i--]);
|
|
goto err_alloc_udc;
|
|
}
|
|
}
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
dum[i] = kzalloc(sizeof(struct dummy), GFP_KERNEL);
|
|
if (!dum[i]) {
|
|
retval = -ENOMEM;
|
|
goto err_add_pdata;
|
|
}
|
|
retval = platform_device_add_data(the_hcd_pdev[i], &dum[i],
|
|
sizeof(void *));
|
|
if (retval)
|
|
goto err_add_pdata;
|
|
retval = platform_device_add_data(the_udc_pdev[i], &dum[i],
|
|
sizeof(void *));
|
|
if (retval)
|
|
goto err_add_pdata;
|
|
}
|
|
|
|
retval = platform_driver_register(&dummy_hcd_driver);
|
|
if (retval < 0)
|
|
goto err_add_pdata;
|
|
retval = platform_driver_register(&dummy_udc_driver);
|
|
if (retval < 0)
|
|
goto err_register_udc_driver;
|
|
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
retval = platform_device_add(the_hcd_pdev[i]);
|
|
if (retval < 0) {
|
|
i--;
|
|
while (i >= 0)
|
|
platform_device_del(the_hcd_pdev[i--]);
|
|
goto err_add_hcd;
|
|
}
|
|
}
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
if (!dum[i]->hs_hcd ||
|
|
(!dum[i]->ss_hcd && mod_data.is_super_speed)) {
|
|
/*
|
|
* The hcd was added successfully but its probe
|
|
* function failed for some reason.
|
|
*/
|
|
retval = -EINVAL;
|
|
goto err_add_udc;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
retval = platform_device_add(the_udc_pdev[i]);
|
|
if (retval < 0) {
|
|
i--;
|
|
while (i >= 0)
|
|
platform_device_del(the_udc_pdev[i--]);
|
|
goto err_add_udc;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
if (!platform_get_drvdata(the_udc_pdev[i])) {
|
|
/*
|
|
* The udc was added successfully but its probe
|
|
* function failed for some reason.
|
|
*/
|
|
retval = -EINVAL;
|
|
goto err_probe_udc;
|
|
}
|
|
}
|
|
return retval;
|
|
|
|
err_probe_udc:
|
|
for (i = 0; i < mod_data.num; i++)
|
|
platform_device_del(the_udc_pdev[i]);
|
|
err_add_udc:
|
|
for (i = 0; i < mod_data.num; i++)
|
|
platform_device_del(the_hcd_pdev[i]);
|
|
err_add_hcd:
|
|
platform_driver_unregister(&dummy_udc_driver);
|
|
err_register_udc_driver:
|
|
platform_driver_unregister(&dummy_hcd_driver);
|
|
err_add_pdata:
|
|
for (i = 0; i < mod_data.num; i++)
|
|
kfree(dum[i]);
|
|
for (i = 0; i < mod_data.num; i++)
|
|
platform_device_put(the_udc_pdev[i]);
|
|
err_alloc_udc:
|
|
for (i = 0; i < mod_data.num; i++)
|
|
platform_device_put(the_hcd_pdev[i]);
|
|
return retval;
|
|
}
|
|
module_init(init);
|
|
|
|
static void __exit cleanup(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < mod_data.num; i++) {
|
|
struct dummy *dum;
|
|
|
|
dum = *((void **)dev_get_platdata(&the_udc_pdev[i]->dev));
|
|
|
|
platform_device_unregister(the_udc_pdev[i]);
|
|
platform_device_unregister(the_hcd_pdev[i]);
|
|
kfree(dum);
|
|
}
|
|
platform_driver_unregister(&dummy_udc_driver);
|
|
platform_driver_unregister(&dummy_hcd_driver);
|
|
}
|
|
module_exit(cleanup);
|