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usb: Introduce DesignWare USB3 DRD Driver

Browse Source 
The DesignWare USB3 is a highly
configurable IP Core which can be
instantiated as Dual-Role Device (DRD),
Peripheral Only and Host Only (XHCI)
configurations.

Several other parameters can be configured
like amount of FIFO space, amount of TX and
RX endpoints, amount of Host Interrupters,
etc.

The current driver has been validated with
a virtual model of version 1.73a of that core
and with an FPGA burned with version 1.83a
of the DRD core. We have support for PCIe
bus, which is used on FPGA prototyping, and
for the OMAP5, more adaptation (or glue)
layers can be easily added and the driver
is half prepared to handle any possible
configuration the HW engineer has chosen
considering we have the information on
one of the GHWPARAMS registers to do
runtime checking of certain features.

More runtime checks can, and should, be added
in order to make this driver even more flexible
with regards to number of endpoints, FIFO sizes,
transfer types, etc.

While this supports only the device side, for
now, we will add support for Host side (xHCI -
see the updated series Sebastian has sent [1])
and OTG after we have it all stabilized.

[1] http://marc.info/?l=linux-usb&m=131341992020339&w=2

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Felipe Balbi 2011-08-19 18:10:58 +03:00 committed by Greg Kroah-Hartman
parent 500fdf8bec
commit 72246da40f
16 changed files with 5712 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
Documentation/usb/dwc3.txt Normal file
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@ -0,0 +1,53 @@
TODO
~~~~~~
Please pick something while reading :)
- Implement streaming support for BULK endpoints
Tatyana's patch "usb: Add streams support to the gadget framework"
introduces streaming support for the gadget driver.
Every usb_request has new field called stream_id which holds its id.
Every usb_ep has a field num_supported_strms which describes the max
number of streams supported (for this ep).
UAS is AFAIK the only gadget with streaming support.
- Convert interrupt handler to per-ep-thread-irq
As it turns out some DWC3-commands ~1ms to complete. Currently we spin
until the command completes which is bad.
Implementation idea:
- dwc core implements a demultiplexing irq chip for interrupts per
endpoint. The interrupt numbers are allocated during probe and belong
to the device. If MSI provides per-endpoint interrupt this dummy
interrupt chip can be replaced with "real" interrupts.
- interrupts are requested / allocated on usb_ep_enable() and removed on
usb_ep_disable(). Worst case are 32 interrupts, the lower limit is two
for ep0/1.
- dwc3_send_gadget_ep_cmd() will sleep in wait_for_completion_timeout()
until the command completes.
- the interrupt handler is split into the following pieces:
- primary handler of the device
goes through every event and calls generic_handle_irq() for event
it. On return from generic_handle_irq() in acknowledges the event
counter so interrupt goes away (eventually).
- threaded handler of the device
none
- primary handler of the EP-interrupt
reads the event and tries to process it. Everything that requries
sleeping is handed over to the Thread. The event is saved in an
per-endpoint data-structure.
We probably have to pay attention not to process events once we
handed something to thread so we don't process event X prio Y
where X > Y.
- threaded handler of the EP-interrupt
handles the remaining EP work which might sleep such as waiting
for command completion.
Latency:
There should be no increase in latency since the interrupt-thread has a
high priority and will be run before an average task in user land
(except the user changed priorities).

2
drivers/usb/Kconfig
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@ -111,6 +111,8 @@ config USB
source "drivers/usb/core/Kconfig"
source "drivers/usb/dwc3/Kconfig"
source "drivers/usb/mon/Kconfig"
source "drivers/usb/wusbcore/Kconfig"

2
drivers/usb/Makefile
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@ -6,6 +6,8 @@
obj-$(CONFIG_USB) += core/
obj-$(CONFIG_USB_DWC3) += dwc3/
obj-$(CONFIG_USB_MON) += mon/
obj-$(CONFIG_PCI) += host/

25
drivers/usb/dwc3/Kconfig Normal file
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@ -0,0 +1,25 @@
config USB_DWC3
tristate "DesignWare USB3 DRD Core Support"
depends on (USB || USB_GADGET)
select USB_OTG_UTILS
help
Say Y or M here if your system has a Dual Role SuperSpeed
USB controller based on the DesignWare USB3 IP Core.
If you choose to build this driver is a dynamically linked
module, the module will be called dwc3.ko.
if USB_DWC3
config USB_DWC3_DEBUG
bool "Enable Debugging Messages"
help
Say Y here to enable debugging messages on DWC3 Driver.
config USB_DWC3_VERBOSE
bool "Enable Verbose Debugging Messages"
depends on USB_DWC3_DEBUG
help
Say Y here to enable verbose debugging messages on DWC3 Driver.
endif

36
drivers/usb/dwc3/Makefile Normal file
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@ -0,0 +1,36 @@
ccflags-$(CONFIG_USB_DWC3_DEBUG) := -DDEBUG
ccflags-$(CONFIG_USB_DWC3_VERBOSE) += -DVERBOSE_DEBUG
obj-$(CONFIG_USB_DWC3) += dwc3.o
dwc3-y := core.o
ifneq ($(CONFIG_USB_GADGET_DWC3),)
dwc3-y += gadget.o ep0.o
endif
ifneq ($(CONFIG_DEBUG_FS),)
dwc3-y += debugfs.o
endif
##
# Platform-specific glue layers go here
#
# NOTICE: Make sure your glue layer doesn't depend on anything
# which is arch-specific and that it compiles on all situations.
#
# We want to keep this requirement in order to be able to compile
# the entire driver (with all its glue layers) on several architectures
# and make sure it compiles fine. This will also help with allmodconfig
# and allyesconfig builds.
#
# The only exception is the PCI glue layer, but that's only because
# PCI doesn't provide nops if CONFIG_PCI isn't enabled.
##
obj-$(CONFIG_USB_DWC3) += dwc3-omap.o
ifneq ($(CONFIG_PCI),)
obj-$(CONFIG_USB_DWC3) += dwc3-pci.o
endif

467
drivers/usb/dwc3/core.c Normal file
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/**
* core.c - DesignWare USB3 DRD Controller Core file
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include "core.h"
#include "gadget.h"
#include "io.h"
#include "debug.h"
/**
* dwc3_core_soft_reset - Issues core soft reset and PHY reset
* @dwc: pointer to our context structure
*/
static void dwc3_core_soft_reset(struct dwc3 *dwc)
{
u32 reg;
/* Before Resetting PHY, put Core in Reset */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg |= DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
/* Assert USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Assert USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
mdelay(100);
/* Clear USB3 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
/* Clear USB2 PHY reset */
reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST;
dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
/* After PHYs are stable we can take Core out of reset state */
reg = dwc3_readl(dwc->regs, DWC3_GCTL);
reg &= ~DWC3_GCTL_CORESOFTRESET;
dwc3_writel(dwc->regs, DWC3_GCTL, reg);
}
/**
* dwc3_free_one_event_buffer - Frees one event buffer
* @dwc: Pointer to our controller context structure
* @evt: Pointer to event buffer to be freed
*/
static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
struct dwc3_event_buffer *evt)
{
dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma);
kfree(evt);
}
/**
* dwc3_alloc_one_event_buffer - Allocated one event buffer structure
* @dwc: Pointer to our controller context structure
* @length: size of the event buffer
*
* Returns a pointer to the allocated event buffer structure on succes
* otherwise ERR_PTR(errno).
*/
static struct dwc3_event_buffer *__devinit
dwc3_alloc_one_event_buffer(struct dwc3 *dwc, unsigned length)
{
struct dwc3_event_buffer *evt;
evt = kzalloc(sizeof(*evt), GFP_KERNEL);
if (!evt)
return ERR_PTR(-ENOMEM);
evt->dwc = dwc;
evt->length = length;
evt->buf = dma_alloc_coherent(dwc->dev, length,
&evt->dma, GFP_KERNEL);
if (!evt->buf) {
kfree(evt);
return ERR_PTR(-ENOMEM);
}
return evt;
}
/**
* dwc3_free_event_buffers - frees all allocated event buffers
* @dwc: Pointer to our controller context structure
*/
static void dwc3_free_event_buffers(struct dwc3 *dwc)
{
struct dwc3_event_buffer *evt;
int i;
for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) {
evt = dwc->ev_buffs[i];
if (evt) {
dwc3_free_one_event_buffer(dwc, evt);
dwc->ev_buffs[i] = NULL;
}
}
}
/**
* dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
* @dwc: Pointer to out controller context structure
* @num: number of event buffers to allocate
* @length: size of event buffer
*
* Returns 0 on success otherwise negative errno. In error the case, dwc
* may contain some buffers allocated but not all which were requested.
*/
static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned num,
unsigned length)
{
int i;
for (i = 0; i < num; i++) {
struct dwc3_event_buffer *evt;
evt = dwc3_alloc_one_event_buffer(dwc, length);
if (IS_ERR(evt)) {
dev_err(dwc->dev, "can't allocate event buffer\n");
return PTR_ERR(evt);
}
dwc->ev_buffs[i] = evt;
}
return 0;
}
/**
* dwc3_event_buffers_setup - setup our allocated event buffers
* @dwc: Pointer to out controller context structure
*
* Returns 0 on success otherwise negative errno.
*/
static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc)
{
struct dwc3_event_buffer *evt;
int n;
for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
evt = dwc->ev_buffs[n];
dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
evt->buf, (unsigned long long) evt->dma,
evt->length);
dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n),
lower_32_bits(evt->dma));
dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n),
upper_32_bits(evt->dma));
dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n),
evt->length & 0xffff);
dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0);
}
return 0;
}
static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
{
struct dwc3_event_buffer *evt;
int n;
for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
evt = dwc->ev_buffs[n];
dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0);
dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0);
dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 0);
dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0);
}
}
/**
* dwc3_core_init - Low-level initialization of DWC3 Core
* @dwc: Pointer to our controller context structure
*
* Returns 0 on success otherwise negative errno.
*/
static int __devinit dwc3_core_init(struct dwc3 *dwc)
{
unsigned long timeout;
u32 reg;
int ret;
dwc3_core_soft_reset(dwc);
/* issue device SoftReset too */
timeout = jiffies + msecs_to_jiffies(500);
dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
do {
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
if (!(reg & DWC3_DCTL_CSFTRST))
break;
if (time_after(jiffies, timeout)) {
dev_err(dwc->dev, "Reset Timed Out\n");
ret = -ETIMEDOUT;
goto err0;
}
cpu_relax();
} while (true);
reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
/* This should read as U3 followed by revision number */
if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) {
dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
ret = -ENODEV;
goto err0;
}
dwc->revision = reg & DWC3_GSNPSREV_MASK;
ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_NUM,
DWC3_EVENT_BUFFERS_SIZE);
if (ret) {
dev_err(dwc->dev, "failed to allocate event buffers\n");
ret = -ENOMEM;
goto err1;
}
ret = dwc3_event_buffers_setup(dwc);
if (ret) {
dev_err(dwc->dev, "failed to setup event buffers\n");
goto err1;
}
return 0;
err1:
dwc3_free_event_buffers(dwc);
err0:
return ret;
}
static void dwc3_core_exit(struct dwc3 *dwc)
{
dwc3_event_buffers_cleanup(dwc);
dwc3_free_event_buffers(dwc);
}
#define DWC3_ALIGN_MASK (16 - 1)
static int __devinit dwc3_probe(struct platform_device *pdev)
{
const struct platform_device_id *id = platform_get_device_id(pdev);
struct resource *res;
struct dwc3 *dwc;
void __iomem *regs;
unsigned int features = id->driver_data;
int ret = -ENOMEM;
int irq;
void *mem;
mem = kzalloc(sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
if (!mem) {
dev_err(&pdev->dev, "not enough memory\n");
goto err0;
}
dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
dwc->mem = mem;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "missing resource\n");
goto err1;
}
res = request_mem_region(res->start, resource_size(res),
dev_name(&pdev->dev));
if (!res) {
dev_err(&pdev->dev, "can't request mem region\n");
goto err1;
}
regs = ioremap(res->start, resource_size(res));
if (!regs) {
dev_err(&pdev->dev, "ioremap failed\n");
goto err2;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "missing IRQ\n");
goto err3;
}
spin_lock_init(&dwc->lock);
platform_set_drvdata(pdev, dwc);
dwc->regs = regs;
dwc->regs_size = resource_size(res);
dwc->dev = &pdev->dev;
dwc->irq = irq;
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
pm_runtime_forbid(&pdev->dev);
ret = dwc3_core_init(dwc);
if (ret) {
dev_err(&pdev->dev, "failed to initialize core\n");
goto err3;
}
if (features & DWC3_HAS_PERIPHERAL) {
ret = dwc3_gadget_init(dwc);
if (ret) {
dev_err(&pdev->dev, "failed to initialized gadget\n");
goto err4;
}
}
ret = dwc3_debugfs_init(dwc);
if (ret) {
dev_err(&pdev->dev, "failed to initialize debugfs\n");
goto err5;
}
pm_runtime_allow(&pdev->dev);
return 0;
err5:
if (features & DWC3_HAS_PERIPHERAL)
dwc3_gadget_exit(dwc);
err4:
dwc3_core_exit(dwc);
err3:
iounmap(regs);
err2:
release_mem_region(res->start, resource_size(res));
err1:
kfree(dwc->mem);
err0:
return ret;
}
static int __devexit dwc3_remove(struct platform_device *pdev)
{
const struct platform_device_id *id = platform_get_device_id(pdev);
struct dwc3 *dwc = platform_get_drvdata(pdev);
struct resource *res;
unsigned int features = id->driver_data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
dwc3_debugfs_exit(dwc);
if (features & DWC3_HAS_PERIPHERAL)
dwc3_gadget_exit(dwc);
dwc3_core_exit(dwc);
release_mem_region(res->start, resource_size(res));
iounmap(dwc->regs);
kfree(dwc->mem);
return 0;
}
static const struct platform_device_id dwc3_id_table[] __devinitconst = {
{
.name = "dwc3-omap",
.driver_data = (DWC3_HAS_PERIPHERAL
| DWC3_HAS_XHCI
| DWC3_HAS_OTG),
},
{
.name = "dwc3-pci",
.driver_data = DWC3_HAS_PERIPHERAL,
},
{ }, /* Terminating Entry */
};
MODULE_DEVICE_TABLE(platform, dwc3_id_table);
static struct platform_driver dwc3_driver = {
.probe = dwc3_probe,
.remove = __devexit_p(dwc3_remove),
.driver = {
.name = "dwc3",
},
.id_table = dwc3_id_table,
};
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
static int __devinit dwc3_init(void)
{
return platform_driver_register(&dwc3_driver);
}
module_init(dwc3_init);
static void __exit dwc3_exit(void)
{
platform_driver_unregister(&dwc3_driver);
}
module_exit(dwc3_exit);

709
drivers/usb/dwc3/core.h Normal file
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@ -0,0 +1,709 @@
/**
* core.h - DesignWare USB3 DRD Core Header
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __DRIVERS_USB_DWC3_CORE_H
#define __DRIVERS_USB_DWC3_CORE_H
#include <linux/device.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/debugfs.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
/* Global constants */
#define DWC3_ENDPOINTS_NUM 32
#define DWC3_EVENT_BUFFERS_NUM 2
#define DWC3_EVENT_BUFFERS_SIZE PAGE_SIZE
#define DWC3_EVENT_TYPE_MASK 0xfe
#define DWC3_EVENT_TYPE_DEV 0
#define DWC3_EVENT_TYPE_CARKIT 3
#define DWC3_EVENT_TYPE_I2C 4
#define DWC3_DEVICE_EVENT_DISCONNECT 0
#define DWC3_DEVICE_EVENT_RESET 1
#define DWC3_DEVICE_EVENT_CONNECT_DONE 2
#define DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE 3
#define DWC3_DEVICE_EVENT_WAKEUP 4
#define DWC3_DEVICE_EVENT_EOPF 6
#define DWC3_DEVICE_EVENT_SOF 7
#define DWC3_DEVICE_EVENT_ERRATIC_ERROR 9
#define DWC3_DEVICE_EVENT_CMD_CMPL 10
#define DWC3_DEVICE_EVENT_OVERFLOW 11
#define DWC3_GEVNTCOUNT_MASK 0xfffc
#define DWC3_GSNPSID_MASK 0xffff0000
#define DWC3_GSNPSREV_MASK 0xffff
/* Global Registers */
#define DWC3_GSBUSCFG0 0xc100
#define DWC3_GSBUSCFG1 0xc104
#define DWC3_GTXTHRCFG 0xc108
#define DWC3_GRXTHRCFG 0xc10c
#define DWC3_GCTL 0xc110
#define DWC3_GEVTEN 0xc114
#define DWC3_GSTS 0xc118
#define DWC3_GSNPSID 0xc120
#define DWC3_GGPIO 0xc124
#define DWC3_GUID 0xc128
#define DWC3_GUCTL 0xc12c
#define DWC3_GBUSERRADDR0 0xc130
#define DWC3_GBUSERRADDR1 0xc134
#define DWC3_GPRTBIMAP0 0xc138
#define DWC3_GPRTBIMAP1 0xc13c
#define DWC3_GHWPARAMS0 0xc140
#define DWC3_GHWPARAMS1 0xc144
#define DWC3_GHWPARAMS2 0xc148
#define DWC3_GHWPARAMS3 0xc14c
#define DWC3_GHWPARAMS4 0xc150
#define DWC3_GHWPARAMS5 0xc154
#define DWC3_GHWPARAMS6 0xc158
#define DWC3_GHWPARAMS7 0xc15c
#define DWC3_GDBGFIFOSPACE 0xc160
#define DWC3_GDBGLTSSM 0xc164
#define DWC3_GPRTBIMAP_HS0 0xc180
#define DWC3_GPRTBIMAP_HS1 0xc184
#define DWC3_GPRTBIMAP_FS0 0xc188
#define DWC3_GPRTBIMAP_FS1 0xc18c
#define DWC3_GUSB2PHYCFG(n) (0xc200 + (n * 0x04))
#define DWC3_GUSB2I2CCTL(n) (0xc240 + (n * 0x04))
#define DWC3_GUSB2PHYACC(n) (0xc280 + (n * 0x04))
#define DWC3_GUSB3PIPECTL(n) (0xc2c0 + (n * 0x04))
#define DWC3_GTXFIFOSIZ(n) (0xc300 + (n * 0x04))
#define DWC3_GRXFIFOSIZ(n) (0xc380 + (n * 0x04))
#define DWC3_GEVNTADRLO(n) (0xc400 + (n * 0x10))
#define DWC3_GEVNTADRHI(n) (0xc404 + (n * 0x10))
#define DWC3_GEVNTSIZ(n) (0xc408 + (n * 0x10))
#define DWC3_GEVNTCOUNT(n) (0xc40c + (n * 0x10))
#define DWC3_GHWPARAMS8 0xc600
/* Device Registers */
#define DWC3_DCFG 0xc700
#define DWC3_DCTL 0xc704
#define DWC3_DEVTEN 0xc708
#define DWC3_DSTS 0xc70c
#define DWC3_DGCMDPAR 0xc710
#define DWC3_DGCMD 0xc714
#define DWC3_DALEPENA 0xc720
#define DWC3_DEPCMDPAR2(n) (0xc800 + (n * 0x10))
#define DWC3_DEPCMDPAR1(n) (0xc804 + (n * 0x10))
#define DWC3_DEPCMDPAR0(n) (0xc808 + (n * 0x10))
#define DWC3_DEPCMD(n) (0xc80c + (n * 0x10))
/* OTG Registers */
#define DWC3_OCFG 0xcc00
#define DWC3_OCTL 0xcc04
#define DWC3_OEVTEN 0xcc08
#define DWC3_OSTS 0xcc0C
/* Bit fields */
/* Global Configuration Register */
#define DWC3_GCTL_PWRDNSCALE(n) (n << 19)
#define DWC3_GCTL_U2RSTECN 16
#define DWC3_GCTL_RAMCLKSEL(x) ((x & DWC3_GCTL_CLK_MASK) << 6)
#define DWC3_GCTL_CLK_BUS (0)
#define DWC3_GCTL_CLK_PIPE (1)
#define DWC3_GCTL_CLK_PIPEHALF (2)
#define DWC3_GCTL_CLK_MASK (3)
#define DWC3_GCTL_PRTCAPDIR(n) (n << 12)
#define DWC3_GCTL_PRTCAP_HOST 1
#define DWC3_GCTL_PRTCAP_DEVICE 2
#define DWC3_GCTL_PRTCAP_OTG 3
#define DWC3_GCTL_CORESOFTRESET (1 << 11)
#define DWC3_GCTL_DISSCRAMBLE (1 << 3)
/* Global USB2 PHY Configuration Register */
#define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31)
#define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6)
/* Global USB3 PIPE Control Register */
#define DWC3_GUSB3PIPECTL_PHYSOFTRST (1 << 31)
#define DWC3_GUSB3PIPECTL_SUSPHY (1 << 17)
/* Device Configuration Register */
#define DWC3_DCFG_DEVADDR(addr) ((addr) << 3)
#define DWC3_DCFG_DEVADDR_MASK DWC3_DCFG_DEVADDR(0x7f)
#define DWC3_DCFG_SPEED_MASK (7 << 0)
#define DWC3_DCFG_SUPERSPEED (4 << 0)
#define DWC3_DCFG_HIGHSPEED (0 << 0)
#define DWC3_DCFG_FULLSPEED2 (1 << 0)
#define DWC3_DCFG_LOWSPEED (2 << 0)
#define DWC3_DCFG_FULLSPEED1 (3 << 0)
/* Device Control Register */
#define DWC3_DCTL_RUN_STOP (1 << 31)
#define DWC3_DCTL_CSFTRST (1 << 30)
#define DWC3_DCTL_LSFTRST (1 << 29)
#define DWC3_DCTL_HIRD_THRES_MASK (0x1f << 24)
#define DWC3_DCTL_HIRD_THRES(n) (((n) & DWC3_DCTL_HIRD_THRES_MASK) >> 24)
#define DWC3_DCTL_APPL1RES (1 << 23)
#define DWC3_DCTL_INITU2ENA (1 << 12)
#define DWC3_DCTL_ACCEPTU2ENA (1 << 11)
#define DWC3_DCTL_INITU1ENA (1 << 10)
#define DWC3_DCTL_ACCEPTU1ENA (1 << 9)
#define DWC3_DCTL_TSTCTRL_MASK (0xf << 1)
#define DWC3_DCTL_ULSTCHNGREQ_MASK (0x0f << 5)
#define DWC3_DCTL_ULSTCHNGREQ(n) (((n) << 5) & DWC3_DCTL_ULSTCHNGREQ_MASK)
#define DWC3_DCTL_ULSTCHNG_NO_ACTION (DWC3_DCTL_ULSTCHNGREQ(0))
#define DWC3_DCTL_ULSTCHNG_SS_DISABLED (DWC3_DCTL_ULSTCHNGREQ(4))
#define DWC3_DCTL_ULSTCHNG_RX_DETECT (DWC3_DCTL_ULSTCHNGREQ(5))
#define DWC3_DCTL_ULSTCHNG_SS_INACTIVE (DWC3_DCTL_ULSTCHNGREQ(6))
#define DWC3_DCTL_ULSTCHNG_RECOVERY (DWC3_DCTL_ULSTCHNGREQ(8))
#define DWC3_DCTL_ULSTCHNG_COMPLIANCE (DWC3_DCTL_ULSTCHNGREQ(10))
#define DWC3_DCTL_ULSTCHNG_LOOPBACK (DWC3_DCTL_ULSTCHNGREQ(11))
/* Device Event Enable Register */
#define DWC3_DEVTEN_VNDRDEVTSTRCVEDEN (1 << 12)
#define DWC3_DEVTEN_EVNTOVERFLOWEN (1 << 11)
#define DWC3_DEVTEN_CMDCMPLTEN (1 << 10)
#define DWC3_DEVTEN_ERRTICERREN (1 << 9)
#define DWC3_DEVTEN_SOFEN (1 << 7)
#define DWC3_DEVTEN_EOPFEN (1 << 6)
#define DWC3_DEVTEN_WKUPEVTEN (1 << 4)
#define DWC3_DEVTEN_ULSTCNGEN (1 << 3)
#define DWC3_DEVTEN_CONNECTDONEEN (1 << 2)
#define DWC3_DEVTEN_USBRSTEN (1 << 1)
#define DWC3_DEVTEN_DISCONNEVTEN (1 << 0)
/* Device Status Register */
#define DWC3_DSTS_PWRUPREQ (1 << 24)
#define DWC3_DSTS_COREIDLE (1 << 23)
#define DWC3_DSTS_DEVCTRLHLT (1 << 22)
#define DWC3_DSTS_USBLNKST_MASK (0x0f << 18)
#define DWC3_DSTS_USBLNKST(n) (((n) & DWC3_DSTS_USBLNKST_MASK) >> 18)
#define DWC3_DSTS_RXFIFOEMPTY (1 << 17)
#define DWC3_DSTS_SOFFN_MASK (0x3ff << 3)
#define DWC3_DSTS_SOFFN(n) (((n) & DWC3_DSTS_SOFFN_MASK) >> 3)
#define DWC3_DSTS_CONNECTSPD (7 << 0)
#define DWC3_DSTS_SUPERSPEED (4 << 0)
#define DWC3_DSTS_HIGHSPEED (0 << 0)
#define DWC3_DSTS_FULLSPEED2 (1 << 0)
#define DWC3_DSTS_LOWSPEED (2 << 0)
#define DWC3_DSTS_FULLSPEED1 (3 << 0)
/* Device Generic Command Register */
#define DWC3_DGCMD_SET_LMP 0x01
#define DWC3_DGCMD_SET_PERIODIC_PAR 0x02
#define DWC3_DGCMD_XMIT_FUNCTION 0x03
#define DWC3_DGCMD_SELECTED_FIFO_FLUSH 0x09
#define DWC3_DGCMD_ALL_FIFO_FLUSH 0x0a
#define DWC3_DGCMD_SET_ENDPOINT_NRDY 0x0c
#define DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK 0x10
/* Device Endpoint Command Register */
#define DWC3_DEPCMD_PARAM_SHIFT 16
#define DWC3_DEPCMD_PARAM(x) (x << DWC3_DEPCMD_PARAM_SHIFT)
#define DWC3_DEPCMD_GET_RSC_IDX(x) ((x >> DWC3_DEPCMD_PARAM_SHIFT) & 0x7f)
#define DWC3_DEPCMD_STATUS_MASK (0x0f << 12)
#define DWC3_DEPCMD_STATUS(x) ((x & DWC3_DEPCMD_STATUS_MASK) >> 12)
#define DWC3_DEPCMD_HIPRI_FORCERM (1 << 11)
#define DWC3_DEPCMD_CMDACT (1 << 10)
#define DWC3_DEPCMD_CMDIOC (1 << 8)
#define DWC3_DEPCMD_DEPSTARTCFG (0x09 << 0)
#define DWC3_DEPCMD_ENDTRANSFER (0x08 << 0)
#define DWC3_DEPCMD_UPDATETRANSFER (0x07 << 0)
#define DWC3_DEPCMD_STARTTRANSFER (0x06 << 0)
#define DWC3_DEPCMD_CLEARSTALL (0x05 << 0)
#define DWC3_DEPCMD_SETSTALL (0x04 << 0)
#define DWC3_DEPCMD_GETSEQNUMBER (0x03 << 0)
#define DWC3_DEPCMD_SETTRANSFRESOURCE (0x02 << 0)
#define DWC3_DEPCMD_SETEPCONFIG (0x01 << 0)
/* The EP number goes 0..31 so ep0 is always out and ep1 is always in */
#define DWC3_DALEPENA_EP(n) (1 << n)
#define DWC3_DEPCMD_TYPE_CONTROL 0
#define DWC3_DEPCMD_TYPE_ISOC 1
#define DWC3_DEPCMD_TYPE_BULK 2
#define DWC3_DEPCMD_TYPE_INTR 3
/* Structures */
struct dwc3_trb_hw;
/**
* struct dwc3_event_buffer - Software event buffer representation
* @list: a list of event buffers
* @buf: _THE_ buffer
* @length: size of this buffer
* @dma: dma_addr_t
* @dwc: pointer to DWC controller
*/
struct dwc3_event_buffer {
void *buf;
unsigned length;
unsigned int lpos;
dma_addr_t dma;
struct dwc3 *dwc;
};
#define DWC3_EP_FLAG_STALLED (1 << 0)
#define DWC3_EP_FLAG_WEDGED (1 << 1)
#define DWC3_EP_DIRECTION_TX true
#define DWC3_EP_DIRECTION_RX false
#define DWC3_TRB_NUM 32
#define DWC3_TRB_MASK (DWC3_TRB_NUM - 1)
/**
* struct dwc3_ep - device side endpoint representation
* @endpoint: usb endpoint
* @request_list: list of requests for this endpoint
* @req_queued: list of requests on this ep which have TRBs setup
* @trb_pool: array of transaction buffers
* @trb_pool_dma: dma address of @trb_pool
* @free_slot: next slot which is going to be used
* @busy_slot: first slot which is owned by HW
* @desc: usb_endpoint_descriptor pointer
* @dwc: pointer to DWC controller
* @flags: endpoint flags (wedged, stalled, ...)
* @current_trb: index of current used trb
* @number: endpoint number (1 - 15)
* @type: set to bmAttributes & USB_ENDPOINT_XFERTYPE_MASK
* @res_trans_idx: Resource transfer index
* @interval: the intervall on which the ISOC transfer is started
* @name: a human readable name e.g. ep1out-bulk
* @direction: true for TX, false for RX
*/
struct dwc3_ep {
struct usb_ep endpoint;
struct list_head request_list;
struct list_head req_queued;
struct dwc3_trb_hw *trb_pool;
dma_addr_t trb_pool_dma;
u32 free_slot;
u32 busy_slot;
const struct usb_endpoint_descriptor *desc;
struct dwc3 *dwc;
unsigned flags;
#define DWC3_EP_ENABLED (1 << 0)
#define DWC3_EP_STALL (1 << 1)
#define DWC3_EP_WEDGE (1 << 2)
#define DWC3_EP_BUSY (1 << 4)
#define DWC3_EP_PENDING_REQUEST (1 << 5)
#define DWC3_EP_WILL_SHUTDOWN (1 << 6)
unsigned current_trb;
u8 number;
u8 type;
u8 res_trans_idx;
u32 interval;
char name[20];
unsigned direction:1;
};
enum dwc3_phy {
DWC3_PHY_UNKNOWN = 0,
DWC3_PHY_USB3,
DWC3_PHY_USB2,
};
enum dwc3_ep0_state {
EP0_UNCONNECTED = 0,
EP0_IDLE,
EP0_IN_DATA_PHASE,
EP0_OUT_DATA_PHASE,
EP0_IN_WAIT_GADGET,
EP0_OUT_WAIT_GADGET,
EP0_IN_WAIT_NRDY,
EP0_OUT_WAIT_NRDY,
EP0_IN_STATUS_PHASE,
EP0_OUT_STATUS_PHASE,
EP0_STALL,
};
enum dwc3_link_state {
/* In SuperSpeed */
DWC3_LINK_STATE_U0 = 0x00, /* in HS, means ON */
DWC3_LINK_STATE_U1 = 0x01,
DWC3_LINK_STATE_U2 = 0x02, /* in HS, means SLEEP */
DWC3_LINK_STATE_U3 = 0x03, /* in HS, means SUSPEND */
DWC3_LINK_STATE_SS_DIS = 0x04,
DWC3_LINK_STATE_RX_DET = 0x05, /* in HS, means Early Suspend */
DWC3_LINK_STATE_SS_INACT = 0x06,
DWC3_LINK_STATE_POLL = 0x07,
DWC3_LINK_STATE_RECOV = 0x08,
DWC3_LINK_STATE_HRESET = 0x09,
DWC3_LINK_STATE_CMPLY = 0x0a,
DWC3_LINK_STATE_LPBK = 0x0b,
DWC3_LINK_STATE_MASK = 0x0f,
};
enum dwc3_device_state {
DWC3_DEFAULT_STATE,
DWC3_ADDRESS_STATE,
DWC3_CONFIGURED_STATE,
};
/**
* struct dwc3_trb - transfer request block
* @bpl: lower 32bit of the buffer
* @bph: higher 32bit of the buffer
* @length: buffer size (up to 16mb - 1)
* @pcm1: packet count m1
* @trbsts: trb status
* 0 = ok
* 1 = missed isoc
* 2 = setup pending
* @hwo: hardware owner of descriptor
* @lst: last trb
* @chn: chain buffers
* @csp: continue on short packets (only supported on isoc eps)
* @trbctl: trb control
* 1 = normal
* 2 = control-setup
* 3 = control-status-2
* 4 = control-status-3
* 5 = control-data (first trb of data stage)
* 6 = isochronous-first (first trb of service interval)
* 7 = isochronous
* 8 = link trb
* others = reserved
* @isp_imi: interrupt on short packet / interrupt on missed isoc
* @ioc: interrupt on complete
* @sid_sofn: Stream ID / SOF Number
*/
struct dwc3_trb {
u64 bplh;
union {
struct {
u32 length:24;
u32 pcm1:2;
u32 reserved27_26:2;
u32 trbsts:4;
#define DWC3_TRB_STS_OKAY 0
#define DWC3_TRB_STS_MISSED_ISOC 1
#define DWC3_TRB_STS_SETUP_PENDING 2
};
u32 len_pcm;
};
union {
struct {
u32 hwo:1;
u32 lst:1;
u32 chn:1;
u32 csp:1;
u32 trbctl:6;
u32 isp_imi:1;
u32 ioc:1;
u32 reserved13_12:2;
u32 sid_sofn:16;
u32 reserved31_30:2;
};
u32 control;
};
} __packed;
/**
* struct dwc3_trb_hw - transfer request block (hw format)
* @bpl: DW0-3
* @bph: DW4-7
* @size: DW8-B
* @trl: DWC-F
*/
struct dwc3_trb_hw {
__le32 bpl;
__le32 bph;
__le32 size;
__le32 ctrl;
} __packed;
static inline void dwc3_trb_to_hw(struct dwc3_trb *nat, struct dwc3_trb_hw *hw)
{
hw->bpl = cpu_to_le32(lower_32_bits(nat->bplh));
hw->bph = cpu_to_le32(upper_32_bits(nat->bplh));
hw->size = cpu_to_le32p(&nat->len_pcm);
/* HWO is written last */
hw->ctrl = cpu_to_le32p(&nat->control);
}
static inline void dwc3_trb_to_nat(struct dwc3_trb_hw *hw, struct dwc3_trb *nat)
{
u64 bplh;
bplh = le32_to_cpup(&hw->bpl);
bplh |= (u64) le32_to_cpup(&hw->bph) << 32;
nat->bplh = bplh;
nat->len_pcm = le32_to_cpup(&hw->size);
nat->control = le32_to_cpup(&hw->ctrl);
}
/**
* struct dwc3 - representation of our controller
* ctrl_req: usb control request which is used for ep0
* ep0_trb: trb which is used for the ctrl_req
* setup_buf: used while precessing STD USB requests
* ctrl_req_addr: dma address of ctrl_req
* ep0_trb: dma address of ep0_trb
* ep0_usb_req: dummy req used while handling STD USB requests
* setup_buf_addr: dma address of setup_buf
* @lock: for synchronizing
* @dev: pointer to our struct device
* @event_buffer_list: a list of event buffers
* @gadget: device side representation of the peripheral controller
* @gadget_driver: pointer to the gadget driver
* @regs: base address for our registers
* @regs_size: address space size
* @irq: IRQ number
* @revision: revision register contents
* @is_selfpowered: true when we are selfpowered
* @three_stage_setup: set if we perform a three phase setup
* @ep0_status_pending: ep0 status response without a req is pending
* @ep0state: state of endpoint zero
* @link_state: link state
* @speed: device speed (super, high, full, low)
* @mem: points to start of memory which is used for this struct.
* @root: debugfs root folder pointer
*/
struct dwc3 {
struct usb_ctrlrequest *ctrl_req;
struct dwc3_trb_hw *ep0_trb;
u8 *setup_buf;
dma_addr_t ctrl_req_addr;
dma_addr_t ep0_trb_addr;
dma_addr_t setup_buf_addr;
struct usb_request ep0_usb_req;
/* device lock */
spinlock_t lock;
struct device *dev;
struct dwc3_event_buffer *ev_buffs[DWC3_EVENT_BUFFERS_NUM];
struct dwc3_ep *eps[DWC3_ENDPOINTS_NUM];
struct usb_gadget gadget;
struct usb_gadget_driver *gadget_driver;
void __iomem *regs;
size_t regs_size;
int irq;
u32 revision;
#define DWC3_REVISION_173A 0x5533173a
#define DWC3_REVISION_175A 0x5533175a
#define DWC3_REVISION_180A 0x5533180a
#define DWC3_REVISION_183A 0x5533183a
#define DWC3_REVISION_185A 0x5533185a
#define DWC3_REVISION_188A 0x5533188a
#define DWC3_REVISION_190A 0x5533190a
unsigned is_selfpowered:1;
unsigned three_stage_setup:1;
unsigned ep0_status_pending:1;
enum dwc3_ep0_state ep0state;
enum dwc3_link_state link_state;
enum dwc3_device_state dev_state;
u8 speed;
void *mem;
struct dentry *root;
};
/* -------------------------------------------------------------------------- */
#define DWC3_TRBSTS_OK 0
#define DWC3_TRBSTS_MISSED_ISOC 1
#define DWC3_TRBSTS_SETUP_PENDING 2
#define DWC3_TRBCTL_NORMAL 1
#define DWC3_TRBCTL_CONTROL_SETUP 2
#define DWC3_TRBCTL_CONTROL_STATUS2 3
#define DWC3_TRBCTL_CONTROL_STATUS3 4
#define DWC3_TRBCTL_CONTROL_DATA 5
#define DWC3_TRBCTL_ISOCHRONOUS_FIRST 6
#define DWC3_TRBCTL_ISOCHRONOUS 7
#define DWC3_TRBCTL_LINK_TRB 8
/* -------------------------------------------------------------------------- */
struct dwc3_event_type {
u32 is_devspec:1;
u32 type:6;
u32 reserved8_31:25;
} __packed;
#define DWC3_DEPEVT_XFERCOMPLETE 0x01
#define DWC3_DEPEVT_XFERINPROGRESS 0x02
#define DWC3_DEPEVT_XFERNOTREADY 0x03
#define DWC3_DEPEVT_RXTXFIFOEVT 0x04
#define DWC3_DEPEVT_STREAMEVT 0x06
#define DWC3_DEPEVT_EPCMDCMPLT 0x07
/**
* struct dwc3_event_depvt - Device Endpoint Events
* @one_bit: indicates this is an endpoint event (not used)
* @endpoint_number: number of the endpoint
* @endpoint_event: The event we have:
* 0x00 - Reserved
* 0x01 - XferComplete
* 0x02 - XferInProgress
* 0x03 - XferNotReady
* 0x04 - RxTxFifoEvt (IN->Underrun, OUT->Overrun)
* 0x05 - Reserved
* 0x06 - StreamEvt
* 0x07 - EPCmdCmplt
* @reserved11_10: Reserved, don't use.
* @status: Indicates the status of the event. Refer to databook for
* more information.
* @parameters: Parameters of the current event. Refer to databook for
* more information.
*/
struct dwc3_event_depevt {
u32 one_bit:1;
u32 endpoint_number:5;
u32 endpoint_event:4;
u32 reserved11_10:2;
u32 status:4;
#define DEPEVT_STATUS_BUSERR (1 << 0)
#define DEPEVT_STATUS_SHORT (1 << 1)
#define DEPEVT_STATUS_IOC (1 << 2)
#define DEPEVT_STATUS_LST (1 << 3)
u32 parameters:16;
} __packed;
/**
* struct dwc3_event_devt - Device Events
* @one_bit: indicates this is a non-endpoint event (not used)
* @device_event: indicates it's a device event. Should read as 0x00
* @type: indicates the type of device event.
* 0 - DisconnEvt
* 1 - USBRst
* 2 - ConnectDone
* 3 - ULStChng
* 4 - WkUpEvt
* 5 - Reserved
* 6 - EOPF
* 7 - SOF
* 8 - Reserved
* 9 - ErrticErr
* 10 - CmdCmplt
* 11 - EvntOverflow
* 12 - VndrDevTstRcved
* @reserved15_12: Reserved, not used
* @event_info: Information about this event
* @reserved31_24: Reserved, not used
*/
struct dwc3_event_devt {
u32 one_bit:1;
u32 device_event:7;
u32 type:4;
u32 reserved15_12:4;
u32 event_info:8;
u32 reserved31_24:8;
} __packed;
/**
* struct dwc3_event_gevt - Other Core Events
* @one_bit: indicates this is a non-endpoint event (not used)
* @device_event: indicates it's (0x03) Carkit or (0x04) I2C event.
* @phy_port_number: self-explanatory
* @reserved31_12: Reserved, not used.
*/
struct dwc3_event_gevt {
u32 one_bit:1;
u32 device_event:7;
u32 phy_port_number:4;
u32 reserved31_12:20;
} __packed;
/**
* union dwc3_event - representation of Event Buffer contents
* @raw: raw 32-bit event
* @type: the type of the event
* @depevt: Device Endpoint Event
* @devt: Device Event
* @gevt: Global Event
*/
union dwc3_event {
u32 raw;
struct dwc3_event_type type;
struct dwc3_event_depevt depevt;
struct dwc3_event_devt devt;
struct dwc3_event_gevt gevt;
};
/*
* DWC3 Features to be used as Driver Data
*/
#define DWC3_HAS_PERIPHERAL BIT(0)
#define DWC3_HAS_XHCI BIT(1)
#define DWC3_HAS_OTG BIT(3)
#endif /* __DRIVERS_USB_DWC3_CORE_H */

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/**
* debug.h - DesignWare USB3 DRD Controller Debug Header
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "core.h"
#ifdef CONFIG_DEBUG_FS
extern int dwc3_debugfs_init(struct dwc3 *);
extern void dwc3_debugfs_exit(struct dwc3 *);
#else
static inline int dwc3_debugfs_init(struct dwc3 *d)
{ return 0; }
static inline void dwc3_debugfs_exit(struct dwc3 *d)
{ }
#endif

534
drivers/usb/dwc3/debugfs.c Normal file
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/**
* debugfs.c - DesignWare USB3 DRD Controller DebugFS file
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/ptrace.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
#include "core.h"
#include "gadget.h"
#include "io.h"
struct dwc3_register {
const char *name;
u32 offset;
};
#define dump_register(nm) \
{ \
.name = __stringify(nm), \
.offset = DWC3_ ##nm, \
}
static const struct dwc3_register dwc3_regs[] = {
dump_register(GSBUSCFG0),
dump_register(GSBUSCFG1),
dump_register(GTXTHRCFG),
dump_register(GRXTHRCFG),
dump_register(GCTL),
dump_register(GEVTEN),
dump_register(GSTS),
dump_register(GSNPSID),
dump_register(GGPIO),
dump_register(GUID),
dump_register(GUCTL),
dump_register(GBUSERRADDR0),
dump_register(GBUSERRADDR1),
dump_register(GPRTBIMAP0),
dump_register(GPRTBIMAP1),
dump_register(GHWPARAMS0),
dump_register(GHWPARAMS1),
dump_register(GHWPARAMS2),
dump_register(GHWPARAMS3),
dump_register(GHWPARAMS4),
dump_register(GHWPARAMS5),
dump_register(GHWPARAMS6),
dump_register(GHWPARAMS7),
dump_register(GDBGFIFOSPACE),
dump_register(GDBGLTSSM),
dump_register(GPRTBIMAP_HS0),
dump_register(GPRTBIMAP_HS1),
dump_register(GPRTBIMAP_FS0),
dump_register(GPRTBIMAP_FS1),
dump_register(GUSB2PHYCFG(0)),
dump_register(GUSB2PHYCFG(1)),
dump_register(GUSB2PHYCFG(2)),
dump_register(GUSB2PHYCFG(3)),
dump_register(GUSB2PHYCFG(4)),
dump_register(GUSB2PHYCFG(5)),
dump_register(GUSB2PHYCFG(6)),
dump_register(GUSB2PHYCFG(7)),
dump_register(GUSB2PHYCFG(8)),
dump_register(GUSB2PHYCFG(9)),
dump_register(GUSB2PHYCFG(10)),
dump_register(GUSB2PHYCFG(11)),
dump_register(GUSB2PHYCFG(12)),
dump_register(GUSB2PHYCFG(13)),
dump_register(GUSB2PHYCFG(14)),
dump_register(GUSB2PHYCFG(15)),
dump_register(GUSB2I2CCTL(0)),
dump_register(GUSB2I2CCTL(1)),
dump_register(GUSB2I2CCTL(2)),
dump_register(GUSB2I2CCTL(3)),
dump_register(GUSB2I2CCTL(4)),
dump_register(GUSB2I2CCTL(5)),
dump_register(GUSB2I2CCTL(6)),
dump_register(GUSB2I2CCTL(7)),
dump_register(GUSB2I2CCTL(8)),
dump_register(GUSB2I2CCTL(9)),
dump_register(GUSB2I2CCTL(10)),
dump_register(GUSB2I2CCTL(11)),
dump_register(GUSB2I2CCTL(12)),
dump_register(GUSB2I2CCTL(13)),
dump_register(GUSB2I2CCTL(14)),
dump_register(GUSB2I2CCTL(15)),
dump_register(GUSB2PHYACC(0)),
dump_register(GUSB2PHYACC(1)),
dump_register(GUSB2PHYACC(2)),
dump_register(GUSB2PHYACC(3)),
dump_register(GUSB2PHYACC(4)),
dump_register(GUSB2PHYACC(5)),
dump_register(GUSB2PHYACC(6)),
dump_register(GUSB2PHYACC(7)),
dump_register(GUSB2PHYACC(8)),
dump_register(GUSB2PHYACC(9)),
dump_register(GUSB2PHYACC(10)),
dump_register(GUSB2PHYACC(11)),
dump_register(GUSB2PHYACC(12)),
dump_register(GUSB2PHYACC(13)),
dump_register(GUSB2PHYACC(14)),
dump_register(GUSB2PHYACC(15)),
dump_register(GUSB3PIPECTL(0)),
dump_register(GUSB3PIPECTL(1)),
dump_register(GUSB3PIPECTL(2)),
dump_register(GUSB3PIPECTL(3)),
dump_register(GUSB3PIPECTL(4)),
dump_register(GUSB3PIPECTL(5)),
dump_register(GUSB3PIPECTL(6)),
dump_register(GUSB3PIPECTL(7)),
dump_register(GUSB3PIPECTL(8)),
dump_register(GUSB3PIPECTL(9)),
dump_register(GUSB3PIPECTL(10)),
dump_register(GUSB3PIPECTL(11)),
dump_register(GUSB3PIPECTL(12)),
dump_register(GUSB3PIPECTL(13)),
dump_register(GUSB3PIPECTL(14)),
dump_register(GUSB3PIPECTL(15)),
dump_register(GTXFIFOSIZ(0)),
dump_register(GTXFIFOSIZ(1)),
dump_register(GTXFIFOSIZ(2)),
dump_register(GTXFIFOSIZ(3)),
dump_register(GTXFIFOSIZ(4)),
dump_register(GTXFIFOSIZ(5)),
dump_register(GTXFIFOSIZ(6)),
dump_register(GTXFIFOSIZ(7)),
dump_register(GTXFIFOSIZ(8)),
dump_register(GTXFIFOSIZ(9)),
dump_register(GTXFIFOSIZ(10)),
dump_register(GTXFIFOSIZ(11)),
dump_register(GTXFIFOSIZ(12)),
dump_register(GTXFIFOSIZ(13)),
dump_register(GTXFIFOSIZ(14)),
dump_register(GTXFIFOSIZ(15)),
dump_register(GTXFIFOSIZ(16)),
dump_register(GTXFIFOSIZ(17)),
dump_register(GTXFIFOSIZ(18)),
dump_register(GTXFIFOSIZ(19)),
dump_register(GTXFIFOSIZ(20)),
dump_register(GTXFIFOSIZ(21)),
dump_register(GTXFIFOSIZ(22)),
dump_register(GTXFIFOSIZ(23)),
dump_register(GTXFIFOSIZ(24)),
dump_register(GTXFIFOSIZ(25)),
dump_register(GTXFIFOSIZ(26)),
dump_register(GTXFIFOSIZ(27)),
dump_register(GTXFIFOSIZ(28)),
dump_register(GTXFIFOSIZ(29)),
dump_register(GTXFIFOSIZ(30)),
dump_register(GTXFIFOSIZ(31)),
dump_register(GRXFIFOSIZ(0)),
dump_register(GRXFIFOSIZ(1)),
dump_register(GRXFIFOSIZ(2)),
dump_register(GRXFIFOSIZ(3)),
dump_register(GRXFIFOSIZ(4)),
dump_register(GRXFIFOSIZ(5)),
dump_register(GRXFIFOSIZ(6)),
dump_register(GRXFIFOSIZ(7)),
dump_register(GRXFIFOSIZ(8)),
dump_register(GRXFIFOSIZ(9)),
dump_register(GRXFIFOSIZ(10)),
dump_register(GRXFIFOSIZ(11)),
dump_register(GRXFIFOSIZ(12)),
dump_register(GRXFIFOSIZ(13)),
dump_register(GRXFIFOSIZ(14)),
dump_register(GRXFIFOSIZ(15)),
dump_register(GRXFIFOSIZ(16)),
dump_register(GRXFIFOSIZ(17)),
dump_register(GRXFIFOSIZ(18)),
dump_register(GRXFIFOSIZ(19)),
dump_register(GRXFIFOSIZ(20)),
dump_register(GRXFIFOSIZ(21)),
dump_register(GRXFIFOSIZ(22)),
dump_register(GRXFIFOSIZ(23)),
dump_register(GRXFIFOSIZ(24)),
dump_register(GRXFIFOSIZ(25)),
dump_register(GRXFIFOSIZ(26)),
dump_register(GRXFIFOSIZ(27)),
dump_register(GRXFIFOSIZ(28)),
dump_register(GRXFIFOSIZ(29)),
dump_register(GRXFIFOSIZ(30)),
dump_register(GRXFIFOSIZ(31)),
dump_register(GEVNTADRLO(0)),
dump_register(GEVNTADRHI(0)),
dump_register(GEVNTSIZ(0)),
dump_register(GEVNTCOUNT(0)),
dump_register(GHWPARAMS8),
dump_register(DCFG),
dump_register(DCTL),
dump_register(DEVTEN),
dump_register(DSTS),
dump_register(DGCMDPAR),
dump_register(DGCMD),
dump_register(DALEPENA),
dump_register(DEPCMDPAR2(0)),
dump_register(DEPCMDPAR2(1)),
dump_register(DEPCMDPAR2(2)),
dump_register(DEPCMDPAR2(3)),
dump_register(DEPCMDPAR2(4)),
dump_register(DEPCMDPAR2(5)),
dump_register(DEPCMDPAR2(6)),
dump_register(DEPCMDPAR2(7)),
dump_register(DEPCMDPAR2(8)),
dump_register(DEPCMDPAR2(9)),
dump_register(DEPCMDPAR2(10)),
dump_register(DEPCMDPAR2(11)),
dump_register(DEPCMDPAR2(12)),
dump_register(DEPCMDPAR2(13)),
dump_register(DEPCMDPAR2(14)),
dump_register(DEPCMDPAR2(15)),
dump_register(DEPCMDPAR2(16)),
dump_register(DEPCMDPAR2(17)),
dump_register(DEPCMDPAR2(18)),
dump_register(DEPCMDPAR2(19)),
dump_register(DEPCMDPAR2(20)),
dump_register(DEPCMDPAR2(21)),
dump_register(DEPCMDPAR2(22)),
dump_register(DEPCMDPAR2(23)),
dump_register(DEPCMDPAR2(24)),
dump_register(DEPCMDPAR2(25)),
dump_register(DEPCMDPAR2(26)),
dump_register(DEPCMDPAR2(27)),
dump_register(DEPCMDPAR2(28)),
dump_register(DEPCMDPAR2(29)),
dump_register(DEPCMDPAR2(30)),
dump_register(DEPCMDPAR2(31)),
dump_register(DEPCMDPAR1(0)),
dump_register(DEPCMDPAR1(1)),
dump_register(DEPCMDPAR1(2)),
dump_register(DEPCMDPAR1(3)),
dump_register(DEPCMDPAR1(4)),
dump_register(DEPCMDPAR1(5)),
dump_register(DEPCMDPAR1(6)),
dump_register(DEPCMDPAR1(7)),
dump_register(DEPCMDPAR1(8)),
dump_register(DEPCMDPAR1(9)),
dump_register(DEPCMDPAR1(10)),
dump_register(DEPCMDPAR1(11)),
dump_register(DEPCMDPAR1(12)),
dump_register(DEPCMDPAR1(13)),
dump_register(DEPCMDPAR1(14)),
dump_register(DEPCMDPAR1(15)),
dump_register(DEPCMDPAR1(16)),
dump_register(DEPCMDPAR1(17)),
dump_register(DEPCMDPAR1(18)),
dump_register(DEPCMDPAR1(19)),
dump_register(DEPCMDPAR1(20)),
dump_register(DEPCMDPAR1(21)),
dump_register(DEPCMDPAR1(22)),
dump_register(DEPCMDPAR1(23)),
dump_register(DEPCMDPAR1(24)),
dump_register(DEPCMDPAR1(25)),
dump_register(DEPCMDPAR1(26)),
dump_register(DEPCMDPAR1(27)),
dump_register(DEPCMDPAR1(28)),
dump_register(DEPCMDPAR1(29)),
dump_register(DEPCMDPAR1(30)),
dump_register(DEPCMDPAR1(31)),
dump_register(DEPCMDPAR0(0)),
dump_register(DEPCMDPAR0(1)),
dump_register(DEPCMDPAR0(2)),
dump_register(DEPCMDPAR0(3)),
dump_register(DEPCMDPAR0(4)),
dump_register(DEPCMDPAR0(5)),
dump_register(DEPCMDPAR0(6)),
dump_register(DEPCMDPAR0(7)),
dump_register(DEPCMDPAR0(8)),
dump_register(DEPCMDPAR0(9)),
dump_register(DEPCMDPAR0(10)),
dump_register(DEPCMDPAR0(11)),
dump_register(DEPCMDPAR0(12)),
dump_register(DEPCMDPAR0(13)),
dump_register(DEPCMDPAR0(14)),
dump_register(DEPCMDPAR0(15)),
dump_register(DEPCMDPAR0(16)),
dump_register(DEPCMDPAR0(17)),
dump_register(DEPCMDPAR0(18)),
dump_register(DEPCMDPAR0(19)),
dump_register(DEPCMDPAR0(20)),
dump_register(DEPCMDPAR0(21)),
dump_register(DEPCMDPAR0(22)),
dump_register(DEPCMDPAR0(23)),
dump_register(DEPCMDPAR0(24)),
dump_register(DEPCMDPAR0(25)),
dump_register(DEPCMDPAR0(26)),
dump_register(DEPCMDPAR0(27)),
dump_register(DEPCMDPAR0(28)),
dump_register(DEPCMDPAR0(29)),
dump_register(DEPCMDPAR0(30)),
dump_register(DEPCMDPAR0(31)),
dump_register(DEPCMD(0)),
dump_register(DEPCMD(1)),
dump_register(DEPCMD(2)),
dump_register(DEPCMD(3)),
dump_register(DEPCMD(4)),
dump_register(DEPCMD(5)),
dump_register(DEPCMD(6)),
dump_register(DEPCMD(7)),
dump_register(DEPCMD(8)),
dump_register(DEPCMD(9)),
dump_register(DEPCMD(10)),
dump_register(DEPCMD(11)),
dump_register(DEPCMD(12)),
dump_register(DEPCMD(13)),
dump_register(DEPCMD(14)),
dump_register(DEPCMD(15)),
dump_register(DEPCMD(16)),
dump_register(DEPCMD(17)),
dump_register(DEPCMD(18)),
dump_register(DEPCMD(19)),
dump_register(DEPCMD(20)),
dump_register(DEPCMD(21)),
dump_register(DEPCMD(22)),
dump_register(DEPCMD(23)),
dump_register(DEPCMD(24)),
dump_register(DEPCMD(25)),
dump_register(DEPCMD(26)),
dump_register(DEPCMD(27)),
dump_register(DEPCMD(28)),
dump_register(DEPCMD(29)),
dump_register(DEPCMD(30)),
dump_register(DEPCMD(31)),
dump_register(OCFG),
dump_register(OCTL),
dump_register(OEVTEN),
dump_register(OSTS),
};
static int dwc3_regdump_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
int i;
seq_printf(s, "DesignWare USB3 Core Register Dump\n");
for (i = 0; i < ARRAY_SIZE(dwc3_regs); i++) {
seq_printf(s, "%-20s : %08x\n", dwc3_regs[i].name,
dwc3_readl(dwc->regs, dwc3_regs[i].offset));
}
return 0;
}
static int dwc3_regdump_open(struct inode *inode, struct file *file)
{
return single_open(file, dwc3_regdump_show, inode->i_private);
}
static const struct file_operations dwc3_regdump_fops = {
.open = dwc3_regdump_open,
.read = seq_read,
.release = single_release,
};
static int dwc3_send_testmode_cmd(struct dwc3 *dwc, int mode)
{
u32 timeout = 250;
dwc3_writel(dwc->regs, DWC3_DGCMDPAR, mode);
dwc3_writel(dwc->regs, DWC3_DGCMD, DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK |
DWC3_DEPCMD_CMDACT);
do {
u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_DGCMD);
if (!(reg & DWC3_DEPCMD_CMDACT))
return 0;
timeout--;
if (!timeout)
return -ETIMEDOUT;
mdelay(1);
} while (1);
}
static struct dwc3_trb_hw trb_0 __aligned(16);
static struct dwc3_trb_hw trb_1 __aligned(16);
#define BUF_SIZE 4096
static int dwc3_testmode_open(struct inode *inode, struct file *file)
{
struct dwc3 *dwc = inode->i_private;
struct dwc3_gadget_ep_cmd_params par0;
struct dwc3_gadget_ep_cmd_params par1;
struct dwc3_trb trb;
int ret;
u8 *buf0;
u8 *buf1;
buf0 = kmalloc(BUF_SIZE, GFP_KERNEL);
if (!buf0)
return -ENOMEM;
buf1 = kmalloc(BUF_SIZE, GFP_KERNEL);
if (!buf1)
return -ENOMEM;
memset(buf0, 0xaa, BUF_SIZE);
memset(buf1, 0x33, BUF_SIZE);
memset(&trb, 0, sizeof(trb));
memset(&par0, 0, sizeof(par0));
memset(&par1, 0, sizeof(par1));
trb.lst = 1;
trb.trbctl = DWC3_TRBCTL_NORMAL;
trb.length = BUF_SIZE;
trb.hwo = 1;
trb.bplh = virt_to_phys(buf0);
dwc3_trb_to_hw(&trb, &trb_0);
trb.bplh = virt_to_phys(buf1);
dwc3_trb_to_hw(&trb, &trb_1);
par0.param0.depstrtxfer.transfer_desc_addr_high =
upper_32_bits(virt_to_phys(&trb_0));
par0.param1.depstrtxfer.transfer_desc_addr_low =
lower_32_bits(virt_to_phys(&trb_0));
par1.param0.depstrtxfer.transfer_desc_addr_high =
upper_32_bits(virt_to_phys(&trb_1));
par1.param1.depstrtxfer.transfer_desc_addr_low =
lower_32_bits(virt_to_phys(&trb_1));
dwc3_send_testmode_cmd(dwc, 1);
ret = dwc3_send_gadget_ep_cmd(dwc, 0, DWC3_DEPCMD_STARTTRANSFER, &par0);
ret = dwc3_send_gadget_ep_cmd(dwc, 1, DWC3_DEPCMD_STARTTRANSFER, &par1);
dwc3_send_testmode_cmd(dwc, 0);
return -EBUSY;
}
static const struct file_operations dwc3_testmode_fops = {
.open = dwc3_testmode_open,
.read = seq_read,
.release = single_release,
};
int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
{
struct dentry *root;
struct dentry *file;
int ret;
root = debugfs_create_dir(dev_name(dwc->dev), NULL);
if (IS_ERR(root)){
ret = PTR_ERR(root);
goto err0;
}
dwc->root = root;
file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
&dwc3_regdump_fops);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
goto err1;
}
file = debugfs_create_file("testmode", S_IRUGO, root, dwc,
&dwc3_testmode_fops);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
goto err1;
}
return 0;
err1:
debugfs_remove_recursive(root);
err0:
return ret;
}
void __devexit dwc3_debugfs_exit(struct dwc3 *dwc)
{
debugfs_remove_recursive(dwc->root);
dwc->root = NULL;
}

410
drivers/usb/dwc3/dwc3-omap.c Normal file
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/**
* dwc3-omap.c - OMAP Specific Glue layer
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include "io.h"
/*
* All these registers belong to OMAP's Wrapper around the
* DesignWare USB3 Core.
*/
#define USBOTGSS_REVISION 0x0000
#define USBOTGSS_SYSCONFIG 0x0010
#define USBOTGSS_IRQ_EOI 0x0020
#define USBOTGSS_IRQSTATUS_RAW_0 0x0024
#define USBOTGSS_IRQSTATUS_0 0x0028
#define USBOTGSS_IRQENABLE_SET_0 0x002c
#define USBOTGSS_IRQENABLE_CLR_0 0x0030
#define USBOTGSS_IRQSTATUS_RAW_1 0x0034
#define USBOTGSS_IRQSTATUS_1 0x0038
#define USBOTGSS_IRQENABLE_SET_1 0x003c
#define USBOTGSS_IRQENABLE_CLR_1 0x0040
#define USBOTGSS_UTMI_OTG_CTRL 0x0080
#define USBOTGSS_UTMI_OTG_STATUS 0x0084
#define USBOTGSS_MMRAM_OFFSET 0x0100
#define USBOTGSS_FLADJ 0x0104
#define USBOTGSS_DEBUG_CFG 0x0108
#define USBOTGSS_DEBUG_DATA 0x010c
/* SYSCONFIG REGISTER */
#define USBOTGSS_SYSCONFIG_DMADISABLE (1 << 16)
#define USBOTGSS_SYSCONFIG_STANDBYMODE(x) ((x) << 4)
#define USBOTGSS_SYSCONFIG_IDLEMODE(x) ((x) << 2)
/* IRQ_EOI REGISTER */
#define USBOTGSS_IRQ_EOI_LINE_NUMBER (1 << 0)
/* IRQS0 BITS */
#define USBOTGSS_IRQO_COREIRQ_ST (1 << 0)
/* IRQ1 BITS */
#define USBOTGSS_IRQ1_DMADISABLECLR (1 << 17)
#define USBOTGSS_IRQ1_OEVT (1 << 16)
#define USBOTGSS_IRQ1_DRVVBUS_RISE (1 << 13)
#define USBOTGSS_IRQ1_CHRGVBUS_RISE (1 << 12)
#define USBOTGSS_IRQ1_DISCHRGVBUS_RISE (1 << 11)
#define USBOTGSS_IRQ1_IDPULLUP_RISE (1 << 8)
#define USBOTGSS_IRQ1_DRVVBUS_FALL (1 << 5)
#define USBOTGSS_IRQ1_CHRGVBUS_FALL (1 << 4)
#define USBOTGSS_IRQ1_DISCHRGVBUS_FALL (1 << 3)
#define USBOTGSS_IRQ1_IDPULLUP_FALL (1 << 0)
/* UTMI_OTG_CTRL REGISTER */
#define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS (1 << 5)
#define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS (1 << 4)
#define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS (1 << 3)
#define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP (1 << 0)
/* UTMI_OTG_STATUS REGISTER */
#define USBOTGSS_UTMI_OTG_STATUS_SW_MODE (1 << 31)
#define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT (1 << 9)
#define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8)
#define USBOTGSS_UTMI_OTG_STATUS_IDDIG (1 << 4)
#define USBOTGSS_UTMI_OTG_STATUS_SESSEND (1 << 3)
#define USBOTGSS_UTMI_OTG_STATUS_SESSVALID (1 << 2)
#define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID (1 << 1)
struct dwc3_omap {
/* device lock */
spinlock_t lock;
struct platform_device *dwc3;
struct device *dev;
int irq;
void __iomem *base;
void *context;
u32 resource_size;
u32 dma_status:1;
};
#ifdef CONFIG_PM
static int dwc3_omap_suspend(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
memcpy_fromio(omap->context, omap->base, omap->resource_size);
return 0;
}
static int dwc3_omap_resume(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
memcpy_toio(omap->base, omap->context, omap->resource_size);
return 0;
}
static int dwc3_omap_idle(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
u32 reg;
/* stop DMA Engine */
reg = dwc3_readl(omap->base, USBOTGSS_SYSCONFIG);
reg &= ~(USBOTGSS_SYSCONFIG_DMADISABLE);
dwc3_writel(omap->base, USBOTGSS_SYSCONFIG, reg);
return 0;
}
static UNIVERSAL_DEV_PM_OPS(dwc3_omap_pm_ops, dwc3_omap_suspend,
dwc3_omap_resume, dwc3_omap_idle);
#define DEV_PM_OPS (&dwc3_omap_pm_ops)
#else
#define DEV_PM_OPS NULL
#endif
static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
{
struct dwc3_omap *omap = _omap;
u32 reg;
u32 ctrl;
spin_lock(&omap->lock);
reg = dwc3_readl(omap->base, USBOTGSS_IRQSTATUS_1);
ctrl = dwc3_readl(omap->base, USBOTGSS_UTMI_OTG_CTRL);
if (reg & USBOTGSS_IRQ1_DMADISABLECLR) {
dev_dbg(omap->base, "DMA Disable was Cleared\n");
omap->dma_status = false;
}
if (reg & USBOTGSS_IRQ1_OEVT)
dev_dbg(omap->base, "OTG Event\n");
if (reg & USBOTGSS_IRQ1_DRVVBUS_RISE) {
dev_dbg(omap->base, "DRVVBUS Rise\n");
ctrl |= USBOTGSS_UTMI_OTG_CTRL_DRVVBUS;
}
if (reg & USBOTGSS_IRQ1_CHRGVBUS_RISE) {
dev_dbg(omap->base, "CHRGVBUS Rise\n");
ctrl |= USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS;
}
if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_RISE) {
dev_dbg(omap->base, "DISCHRGVBUS Rise\n");
ctrl |= USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS;
}
if (reg & USBOTGSS_IRQ1_IDPULLUP_RISE) {
dev_dbg(omap->base, "IDPULLUP Rise\n");
ctrl |= USBOTGSS_UTMI_OTG_CTRL_IDPULLUP;
}
if (reg & USBOTGSS_IRQ1_DRVVBUS_FALL) {
dev_dbg(omap->base, "DRVVBUS Fall\n");
ctrl &= ~USBOTGSS_UTMI_OTG_CTRL_DRVVBUS;
}
if (reg & USBOTGSS_IRQ1_CHRGVBUS_FALL) {
dev_dbg(omap->base, "CHRGVBUS Fall\n");
ctrl &= ~USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS;
}
if (reg & USBOTGSS_IRQ1_DISCHRGVBUS_FALL) {
dev_dbg(omap->base, "DISCHRGVBUS Fall\n");
ctrl &= ~USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS;
}
if (reg & USBOTGSS_IRQ1_IDPULLUP_FALL) {
dev_dbg(omap->base, "IDPULLUP Fall\n");
ctrl &= ~USBOTGSS_UTMI_OTG_CTRL_IDPULLUP;
}
dwc3_writel(omap->base, USBOTGSS_UTMI_OTG_CTRL, ctrl);
spin_unlock(&omap->lock);
return IRQ_HANDLED;
}
static int __devinit dwc3_omap_probe(struct platform_device *pdev)
{
struct platform_device *dwc3;
struct dwc3_omap *omap;
struct resource *res;
int ret = -ENOMEM;
int irq;
u32 reg;
void __iomem *base;
void *context;
omap = kzalloc(sizeof(*omap), GFP_KERNEL);
if (!omap) {
dev_err(&pdev->dev, "not enough memory\n");
goto err0;
}
platform_set_drvdata(pdev, omap);
irq = platform_get_irq(pdev, 1);
if (irq < 0) {
dev_err(&pdev->dev, "missing IRQ resource\n");
ret = -EINVAL;
goto err1;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!res) {
dev_err(&pdev->dev, "missing memory base resource\n");
ret = -EINVAL;
goto err1;
}
base = ioremap_nocache(res->start, resource_size(res));
if (!base) {
dev_err(&pdev->dev, "ioremap failed\n");
goto err1;
}
dwc3 = platform_device_alloc("dwc3-omap", -1);
if (!dwc3) {
dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
goto err2;
}
context = kzalloc(resource_size(res), GFP_KERNEL);
if (!context) {
dev_err(&pdev->dev, "couldn't allocate dwc3 context memory\n");
goto err3;
}
spin_lock_init(&omap->lock);
dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask);
dwc3->dev.parent = &pdev->dev;
dwc3->dev.dma_mask = pdev->dev.dma_mask;
dwc3->dev.dma_parms = pdev->dev.dma_parms;
omap->resource_size = resource_size(res);
omap->context = context;
omap->dev = &pdev->dev;
omap->irq = irq;
omap->base = base;
omap->dwc3 = dwc3;
/* check the DMA Status */
reg = dwc3_readl(omap->base, USBOTGSS_SYSCONFIG);
omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
ret = request_irq(omap->irq, dwc3_omap_interrupt, 0,
"dwc3-wrapper", omap);
if (ret) {
dev_err(&pdev->dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret);
goto err4;
}
/* enable all IRQs */
dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_0, 0x01);
reg = (USBOTGSS_IRQ1_DMADISABLECLR |
USBOTGSS_IRQ1_OEVT |
USBOTGSS_IRQ1_DRVVBUS_RISE |
USBOTGSS_IRQ1_CHRGVBUS_RISE |
USBOTGSS_IRQ1_DISCHRGVBUS_RISE |
USBOTGSS_IRQ1_IDPULLUP_RISE |
USBOTGSS_IRQ1_DRVVBUS_FALL |
USBOTGSS_IRQ1_CHRGVBUS_FALL |
USBOTGSS_IRQ1_DISCHRGVBUS_FALL |
USBOTGSS_IRQ1_IDPULLUP_FALL);
dwc3_writel(omap->base, USBOTGSS_IRQENABLE_SET_1, reg);
ret = platform_device_add_resources(dwc3, pdev->resource,
pdev->num_resources);
if (ret) {
dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
goto err5;
}
ret = platform_device_add(dwc3);
if (ret) {
dev_err(&pdev->dev, "failed to register dwc3 device\n");
goto err5;
}
return 0;
err5:
free_irq(omap->irq, omap);
err4:
kfree(omap->context);
err3:
platform_device_put(dwc3);
err2:
iounmap(base);
err1:
kfree(omap);
err0:
return ret;
}
static int __devexit dwc3_omap_remove(struct platform_device *pdev)
{
struct dwc3_omap *omap = platform_get_drvdata(pdev);
platform_device_unregister(omap->dwc3);
free_irq(omap->irq, omap);
iounmap(omap->base);
kfree(omap->context);
kfree(omap);
return 0;
}
static const struct of_device_id of_dwc3_matach[] = {
{
"ti,dwc3",
},
{ },
};
MODULE_DEVICE_TABLE(of, of_dwc3_matach);
static struct platform_driver dwc3_omap_driver = {
.probe = dwc3_omap_probe,
.remove = __devexit_p(dwc3_omap_remove),
.driver = {
.name = "omap-dwc3",
.pm = DEV_PM_OPS,
.of_match_table = of_dwc3_matach,
},
};
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
static int __devinit dwc3_omap_init(void)
{
return platform_driver_register(&dwc3_omap_driver);
}
module_init(dwc3_omap_init);
static void __exit dwc3_omap_exit(void)
{
platform_driver_unregister(&dwc3_omap_driver);
}
module_exit(dwc3_omap_exit);

219
drivers/usb/dwc3/dwc3-pci.c Normal file
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@ -0,0 +1,219 @@
/**
* dwc3-pci.c - PCI Specific glue layer
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
/* FIXME define these in <linux/pci_ids.h> */
#define PCI_VENDOR_ID_SYNOPSYS 0x16c3
#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
#define DWC3_PCI_DEVS_POSSIBLE 32
struct dwc3_pci {
struct device *dev;
struct platform_device *dwc3;
};
static DECLARE_BITMAP(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
static int dwc3_pci_get_device_id(struct dwc3_pci *glue)
{
int id;
again:
id = find_first_zero_bit(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
if (id < DWC3_PCI_DEVS_POSSIBLE) {
int old;
old = test_and_set_bit(id, dwc3_pci_devs);
if (old)
goto again;
} else {
dev_err(glue->dev, "no space for new device\n");
id = -ENOMEM;
}
return 0;
}
static void dwc3_pci_put_device_id(struct dwc3_pci *glue, int id)
{
int ret;
if (id < 0)
return;
ret = test_bit(id, dwc3_pci_devs);
WARN(!ret, "Device: %s\nID %d not in use\n",
dev_driver_string(glue->dev), id);
clear_bit(id, dwc3_pci_devs);
}
static int __devinit dwc3_pci_probe(struct pci_dev *pci,
const struct pci_device_id *id)
{
struct resource res[2];
struct platform_device *dwc3;
struct dwc3_pci *glue;
int ret = -ENOMEM;
int devid;
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
if (!glue) {
dev_err(&pci->dev, "not enough memory\n");
goto err0;
}
glue->dev = &pci->dev;
ret = pci_enable_device(pci);
if (ret) {
dev_err(&pci->dev, "failed to enable pci device\n");
goto err1;
}
pci_set_power_state(pci, PCI_D0);
pci_set_master(pci);
devid = dwc3_pci_get_device_id(glue);
if (devid < 0)
goto err2;
dwc3 = platform_device_alloc("dwc3-pci", devid);
if (!dwc3) {
dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
goto err3;
}
memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
res[0].start = pci_resource_start(pci, 0);
res[0].end = pci_resource_end(pci, 0);
res[0].name = "dwc_usb3";
res[0].flags = IORESOURCE_MEM;
res[1].start = pci->irq;
res[1].name = "dwc_usb3";
res[1].flags = IORESOURCE_IRQ;
ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
if (ret) {
dev_err(&pci->dev, "couldn't add resources to dwc3 device\n");
goto err4;
}
pci_set_drvdata(pci, glue);
dma_set_coherent_mask(&dwc3->dev, pci->dev.coherent_dma_mask);
dwc3->dev.dma_mask = pci->dev.dma_mask;
dwc3->dev.dma_parms = pci->dev.dma_parms;
dwc3->dev.parent = &pci->dev;
glue->dwc3 = dwc3;
ret = platform_device_add(dwc3);
if (ret) {
dev_err(&pci->dev, "failed to register dwc3 device\n");
goto err4;
}
return 0;
err4:
pci_set_drvdata(pci, NULL);
platform_device_put(dwc3);
err3:
dwc3_pci_put_device_id(glue, devid);
err2:
pci_disable_device(pci);
err1:
kfree(pci);
err0:
return ret;
}
static void __devexit dwc3_pci_remove(struct pci_dev *pci)
{
struct dwc3_pci *glue = pci_get_drvdata(pci);
dwc3_pci_put_device_id(glue, glue->dwc3->id);
platform_device_unregister(glue->dwc3);
pci_set_drvdata(pci, NULL);
pci_disable_device(pci);
kfree(glue);
}
static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
},
{ } /* Terminating Entry */
};
MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
static struct pci_driver dwc3_pci_driver = {
.name = "pci-dwc3",
.id_table = dwc3_pci_id_table,
.probe = dwc3_pci_probe,
.remove = __devexit_p(dwc3_pci_remove),
};
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
static int __devinit dwc3_pci_init(void)
{
return pci_register_driver(&dwc3_pci_driver);
}
module_init(dwc3_pci_init);
static void __exit dwc3_pci_exit(void)
{
pci_unregister_driver(&dwc3_pci_driver);
}
module_exit(dwc3_pci_exit);

782
drivers/usb/dwc3/ep0.c Normal file
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@ -0,0 +1,782 @@
/**
* ep0.c - DesignWare USB3 DRD Controller Endpoint 0 Handling
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/dma-mapping.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include "core.h"
#include "gadget.h"
#include "io.h"
static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
const struct dwc3_event_depevt *event);
static const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
{
switch (state) {
case EP0_UNCONNECTED:
return "Unconnected";
case EP0_IDLE:
return "Idle";
case EP0_IN_DATA_PHASE:
return "IN Data Phase";
case EP0_OUT_DATA_PHASE:
return "OUT Data Phase";
case EP0_IN_WAIT_GADGET:
return "IN Wait Gadget";
case EP0_OUT_WAIT_GADGET:
return "OUT Wait Gadget";
case EP0_IN_WAIT_NRDY:
return "IN Wait NRDY";
case EP0_OUT_WAIT_NRDY:
return "OUT Wait NRDY";
case EP0_IN_STATUS_PHASE:
return "IN Status Phase";
case EP0_OUT_STATUS_PHASE:
return "OUT Status Phase";
case EP0_STALL:
return "Stall";
default:
return "UNKNOWN";
}
}
static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
u32 len)
{
struct dwc3_gadget_ep_cmd_params params;
struct dwc3_trb_hw *trb_hw;
struct dwc3_trb trb;
struct dwc3_ep *dep;
int ret;
dep = dwc->eps[epnum];
trb_hw = dwc->ep0_trb;
memset(&trb, 0, sizeof(trb));
switch (dwc->ep0state) {
case EP0_IDLE:
trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP;
break;
case EP0_IN_WAIT_NRDY:
case EP0_OUT_WAIT_NRDY:
case EP0_IN_STATUS_PHASE:
case EP0_OUT_STATUS_PHASE:
if (dwc->three_stage_setup)
trb.trbctl = DWC3_TRBCTL_CONTROL_STATUS3;
else
trb.trbctl = DWC3_TRBCTL_CONTROL_STATUS2;
if (dwc->ep0state == EP0_IN_WAIT_NRDY)
dwc->ep0state = EP0_IN_STATUS_PHASE;
else if (dwc->ep0state == EP0_OUT_WAIT_NRDY)
dwc->ep0state = EP0_OUT_STATUS_PHASE;
break;
case EP0_IN_WAIT_GADGET:
dwc->ep0state = EP0_IN_WAIT_NRDY;
return 0;
break;
case EP0_OUT_WAIT_GADGET:
dwc->ep0state = EP0_OUT_WAIT_NRDY;
return 0;
break;
case EP0_IN_DATA_PHASE:
case EP0_OUT_DATA_PHASE:
trb.trbctl = DWC3_TRBCTL_CONTROL_DATA;
break;
default:
dev_err(dwc->dev, "%s() can't in state %d\n", __func__,
dwc->ep0state);
return -EINVAL;
}
trb.bplh = buf_dma;
trb.length = len;
trb.hwo = 1;
trb.lst = 1;
trb.ioc = 1;
trb.isp_imi = 1;
dwc3_trb_to_hw(&trb, trb_hw);
memset(&params, 0, sizeof(params));
params.param0.depstrtxfer.transfer_desc_addr_high =
upper_32_bits(dwc->ep0_trb_addr);
params.param1.depstrtxfer.transfer_desc_addr_low =
lower_32_bits(dwc->ep0_trb_addr);
ret = dwc3_send_gadget_ep_cmd(dwc, dep->number,
DWC3_DEPCMD_STARTTRANSFER, &params);
if (ret < 0) {
dev_dbg(dwc->dev, "failed to send STARTTRANSFER command\n");
return ret;
}
dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc,
dep->number);
return 0;
}
static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
struct dwc3_request *req)
{
struct dwc3 *dwc = dep->dwc;
int ret;
req->request.actual = 0;
req->request.status = -EINPROGRESS;
req->direction = dep->direction;
req->epnum = dep->number;
list_add_tail(&req->list, &dep->request_list);
dwc3_map_buffer_to_dma(req);
ret = dwc3_ep0_start_trans(dwc, dep->number, req->request.dma,
req->request.length);
if (ret < 0) {
list_del(&req->list);
dwc3_unmap_buffer_from_dma(req);
}
return ret;
}
int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
gfp_t gfp_flags)
{
struct dwc3_request *req = to_dwc3_request(request);
struct dwc3_ep *dep = to_dwc3_ep(ep);
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
int ret;
switch (dwc->ep0state) {
case EP0_IN_DATA_PHASE:
case EP0_IN_WAIT_GADGET:
case EP0_IN_WAIT_NRDY:
case EP0_IN_STATUS_PHASE:
dep = dwc->eps[1];
break;
case EP0_OUT_DATA_PHASE:
case EP0_OUT_WAIT_GADGET:
case EP0_OUT_WAIT_NRDY:
case EP0_OUT_STATUS_PHASE:
dep = dwc->eps[0];
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&dwc->lock, flags);
if (!dep->desc) {
dev_dbg(dwc->dev, "trying to queue request %p to disabled %s\n",
request, dep->name);
ret = -ESHUTDOWN;
goto out;
}
/* we share one TRB for ep0/1 */
if (!list_empty(&dwc->eps[0]->request_list) ||
!list_empty(&dwc->eps[1]->request_list) ||
dwc->ep0_status_pending) {
ret = -EBUSY;
goto out;
}
dev_vdbg(dwc->dev, "queueing request %p to %s length %d, state '%s'\n",
request, dep->name, request->length,
dwc3_ep0_state_string(dwc->ep0state));
ret = __dwc3_gadget_ep0_queue(dep, req);
out:
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
}
static void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
{
/* stall is always issued on EP0 */
__dwc3_gadget_ep_set_halt(dwc->eps[0], 1);
dwc->eps[0]->flags &= ~DWC3_EP_STALL;
dwc->ep0state = EP0_IDLE;
dwc3_ep0_out_start(dwc);
}
void dwc3_ep0_out_start(struct dwc3 *dwc)
{
struct dwc3_ep *dep;
int ret;
dep = dwc->eps[0];
ret = dwc3_ep0_start_trans(dwc, 0, dwc->ctrl_req_addr, 8);
WARN_ON(ret < 0);
}
/*
* Send a zero length packet for the status phase of the control transfer
*/
static void dwc3_ep0_do_setup_status(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
struct dwc3_ep *dep;
int ret;
u32 epnum;
epnum = event->endpoint_number;
dep = dwc->eps[epnum];
if (epnum)
dwc->ep0state = EP0_IN_STATUS_PHASE;
else
dwc->ep0state = EP0_OUT_STATUS_PHASE;
/*
* Not sure Why I need a buffer for a zero transfer. Maybe the
* HW reacts strange on a NULL pointer
*/
ret = dwc3_ep0_start_trans(dwc, epnum, dwc->ctrl_req_addr, 0);
if (ret) {
dev_dbg(dwc->dev, "failed to start transfer, stalling\n");
dwc3_ep0_stall_and_restart(dwc);
}
}
static struct dwc3_ep *dwc3_wIndex_to_dep(struct dwc3 *dwc, __le16 wIndex_le)
{
struct dwc3_ep *dep;
u32 windex = le16_to_cpu(wIndex_le);
u32 epnum;
epnum = (windex & USB_ENDPOINT_NUMBER_MASK) << 1;
if ((windex & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
epnum |= 1;
dep = dwc->eps[epnum];
if (dep->flags & DWC3_EP_ENABLED)
return dep;
return NULL;
}
static void dwc3_ep0_send_status_response(struct dwc3 *dwc)
{
u32 epnum;
if (dwc->ep0state == EP0_IN_DATA_PHASE)
epnum = 1;
else
epnum = 0;
dwc3_ep0_start_trans(dwc, epnum, dwc->ctrl_req_addr,
dwc->ep0_usb_req.length);
dwc->ep0_status_pending = 1;
}
/*
* ch 9.4.5
*/
static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
struct dwc3_ep *dep;
u32 recip;
u16 usb_status = 0;
__le16 *response_pkt;
recip = ctrl->bRequestType & USB_RECIP_MASK;
switch (recip) {
case USB_RECIP_DEVICE:
/*
* We are self-powered. U1/U2/LTM will be set later
* once we handle this states. RemoteWakeup is 0 on SS
*/
usb_status |= dwc->is_selfpowered << USB_DEVICE_SELF_POWERED;
break;
case USB_RECIP_INTERFACE:
/*
* Function Remote Wake Capable D0
* Function Remote Wakeup D1
*/
break;
case USB_RECIP_ENDPOINT:
dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
if (!dep)
return -EINVAL;
if (dep->flags & DWC3_EP_STALL)
usb_status = 1 << USB_ENDPOINT_HALT;
break;
default:
return -EINVAL;
};
response_pkt = (__le16 *) dwc->setup_buf;
*response_pkt = cpu_to_le16(usb_status);
dwc->ep0_usb_req.length = sizeof(*response_pkt);
dwc3_ep0_send_status_response(dwc);
return 0;
}
static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
struct usb_ctrlrequest *ctrl, int set)
{
struct dwc3_ep *dep;
u32 recip;
u32 wValue;
u32 wIndex;
u32 reg;
int ret;
u32 mode;
wValue = le16_to_cpu(ctrl->wValue);
wIndex = le16_to_cpu(ctrl->wIndex);
recip = ctrl->bRequestType & USB_RECIP_MASK;
switch (recip) {
case USB_RECIP_DEVICE:
/*
* 9.4.1 says only only for SS, in AddressState only for
* default control pipe
*/
switch (wValue) {
case USB_DEVICE_U1_ENABLE:
case USB_DEVICE_U2_ENABLE:
case USB_DEVICE_LTM_ENABLE:
if (dwc->dev_state != DWC3_CONFIGURED_STATE)
return -EINVAL;
if (dwc->speed != DWC3_DSTS_SUPERSPEED)
return -EINVAL;
}
/* XXX add U[12] & LTM */
switch (wValue) {
case USB_DEVICE_REMOTE_WAKEUP:
break;
case USB_DEVICE_U1_ENABLE:
break;
case USB_DEVICE_U2_ENABLE:
break;
case USB_DEVICE_LTM_ENABLE:
break;
case USB_DEVICE_TEST_MODE:
if ((wIndex & 0xff) != 0)
return -EINVAL;
if (!set)
return -EINVAL;
mode = wIndex >> 8;
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_TSTCTRL_MASK;
switch (mode) {
case TEST_J:
case TEST_K:
case TEST_SE0_NAK:
case TEST_PACKET:
case TEST_FORCE_EN:
reg |= mode << 1;
break;
default:
return -EINVAL;
}
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
break;
default:
return -EINVAL;
}
break;
case USB_RECIP_INTERFACE:
switch (wValue) {
case USB_INTRF_FUNC_SUSPEND:
if (wIndex & USB_INTRF_FUNC_SUSPEND_LP)
/* XXX enable Low power suspend */
;
if (wIndex & USB_INTRF_FUNC_SUSPEND_RW)
/* XXX enable remote wakeup */
;
break;
default:
return -EINVAL;
}
break;
case USB_RECIP_ENDPOINT:
switch (wValue) {
case USB_ENDPOINT_HALT:
dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
if (!dep)
return -EINVAL;
ret = __dwc3_gadget_ep_set_halt(dep, set);
if (ret)
return -EINVAL;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
};
dwc->ep0state = EP0_IN_WAIT_NRDY;
return 0;
}
static int dwc3_ep0_set_address(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
int ret = 0;
u32 addr;
u32 reg;
addr = le16_to_cpu(ctrl->wValue);
if (addr > 127)
return -EINVAL;
switch (dwc->dev_state) {
case DWC3_DEFAULT_STATE:
case DWC3_ADDRESS_STATE:
/*
* Not sure if we should program DevAddr now or later
*/
reg = dwc3_readl(dwc->regs, DWC3_DCFG);
reg &= ~(DWC3_DCFG_DEVADDR_MASK);
reg |= DWC3_DCFG_DEVADDR(addr);
dwc3_writel(dwc->regs, DWC3_DCFG, reg);
if (addr)
dwc->dev_state = DWC3_ADDRESS_STATE;
else
dwc->dev_state = DWC3_DEFAULT_STATE;
break;
case DWC3_CONFIGURED_STATE:
ret = -EINVAL;
break;
}
dwc->ep0state = EP0_IN_WAIT_NRDY;
return ret;
}
static int dwc3_ep0_delegate_req(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
int ret;
spin_unlock(&dwc->lock);
ret = dwc->gadget_driver->setup(&dwc->gadget, ctrl);
spin_lock(&dwc->lock);
return ret;
}
static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
u32 cfg;
int ret;
cfg = le16_to_cpu(ctrl->wValue);
switch (dwc->dev_state) {
case DWC3_DEFAULT_STATE:
return -EINVAL;
break;
case DWC3_ADDRESS_STATE:
ret = dwc3_ep0_delegate_req(dwc, ctrl);
/* if the cfg matches and the cfg is non zero */
if (!ret && cfg)
dwc->dev_state = DWC3_CONFIGURED_STATE;
break;
case DWC3_CONFIGURED_STATE:
ret = dwc3_ep0_delegate_req(dwc, ctrl);
if (!cfg)
dwc->dev_state = DWC3_ADDRESS_STATE;
break;
}
return 0;
}
static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
{
int ret;
switch (ctrl->bRequest) {
case USB_REQ_GET_STATUS:
dev_vdbg(dwc->dev, "USB_REQ_GET_STATUS\n");
ret = dwc3_ep0_handle_status(dwc, ctrl);
break;
case USB_REQ_CLEAR_FEATURE:
dev_vdbg(dwc->dev, "USB_REQ_CLEAR_FEATURE\n");
ret = dwc3_ep0_handle_feature(dwc, ctrl, 0);
break;
case USB_REQ_SET_FEATURE:
dev_vdbg(dwc->dev, "USB_REQ_SET_FEATURE\n");
ret = dwc3_ep0_handle_feature(dwc, ctrl, 1);
break;
case USB_REQ_SET_ADDRESS:
dev_vdbg(dwc->dev, "USB_REQ_SET_ADDRESS\n");
ret = dwc3_ep0_set_address(dwc, ctrl);
break;
case USB_REQ_SET_CONFIGURATION:
dev_vdbg(dwc->dev, "USB_REQ_SET_CONFIGURATION\n");
ret = dwc3_ep0_set_config(dwc, ctrl);
break;
default:
dev_vdbg(dwc->dev, "Forwarding to gadget driver\n");
ret = dwc3_ep0_delegate_req(dwc, ctrl);
break;
};
return ret;
}
static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
struct usb_ctrlrequest *ctrl = dwc->ctrl_req;
int ret;
u32 len;
if (!dwc->gadget_driver)
goto err;
len = le16_to_cpu(ctrl->wLength);
if (!len) {
dwc->ep0state = EP0_IN_WAIT_GADGET;
dwc->three_stage_setup = 0;
} else {
dwc->three_stage_setup = 1;
if (ctrl->bRequestType & USB_DIR_IN)
dwc->ep0state = EP0_IN_DATA_PHASE;
else
dwc->ep0state = EP0_OUT_DATA_PHASE;
}
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
ret = dwc3_ep0_std_request(dwc, ctrl);
else
ret = dwc3_ep0_delegate_req(dwc, ctrl);
if (ret >= 0)
return;
err:
dwc3_ep0_stall_and_restart(dwc);
}
static void dwc3_ep0_complete_data(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
struct dwc3_request *r = NULL;
struct usb_request *ur;
struct dwc3_trb trb;
struct dwc3_ep *dep;
u32 transfered;
u8 epnum;
epnum = event->endpoint_number;
dep = dwc->eps[epnum];
if (!dwc->ep0_status_pending) {
r = next_request(&dep->request_list);
ur = &r->request;
} else {
ur = &dwc->ep0_usb_req;
dwc->ep0_status_pending = 0;
}
dwc3_trb_to_nat(dwc->ep0_trb, &trb);
transfered = ur->length - trb.length;
ur->actual += transfered;
if ((epnum & 1) && ur->actual < ur->length) {
/* for some reason we did not get everything out */
dwc3_ep0_stall_and_restart(dwc);
dwc3_gadget_giveback(dep, r, -ECONNRESET);
} else {
/*
* handle the case where we have to send a zero packet. This
* seems to be case when req.length > maxpacket. Could it be?
*/
/* The transfer is complete, wait for HOST */
if (epnum & 1)
dwc->ep0state = EP0_IN_WAIT_NRDY;
else
dwc->ep0state = EP0_OUT_WAIT_NRDY;
if (r)
dwc3_gadget_giveback(dep, r, 0);
}
}
static void dwc3_ep0_complete_req(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
struct dwc3_request *r;
struct dwc3_ep *dep;
u8 epnum;
epnum = event->endpoint_number;
dep = dwc->eps[epnum];
if (!list_empty(&dep->request_list)) {
r = next_request(&dep->request_list);
dwc3_gadget_giveback(dep, r, 0);
}
dwc->ep0state = EP0_IDLE;
dwc3_ep0_out_start(dwc);
}
static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
switch (dwc->ep0state) {
case EP0_IDLE:
dwc3_ep0_inspect_setup(dwc, event);
break;
case EP0_IN_DATA_PHASE:
case EP0_OUT_DATA_PHASE:
dwc3_ep0_complete_data(dwc, event);
break;
case EP0_IN_STATUS_PHASE:
case EP0_OUT_STATUS_PHASE:
dwc3_ep0_complete_req(dwc, event);
break;
case EP0_IN_WAIT_NRDY:
case EP0_OUT_WAIT_NRDY:
case EP0_IN_WAIT_GADGET:
case EP0_OUT_WAIT_GADGET:
case EP0_UNCONNECTED:
case EP0_STALL:
break;
}
}
static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
const struct dwc3_event_depevt *event)
{
switch (dwc->ep0state) {
case EP0_IN_WAIT_GADGET:
dwc->ep0state = EP0_IN_WAIT_NRDY;
break;
case EP0_OUT_WAIT_GADGET:
dwc->ep0state = EP0_OUT_WAIT_NRDY;
break;
case EP0_IN_WAIT_NRDY:
case EP0_OUT_WAIT_NRDY:
dwc3_ep0_do_setup_status(dwc, event);
break;
case EP0_IDLE:
case EP0_IN_STATUS_PHASE:
case EP0_OUT_STATUS_PHASE:
case EP0_IN_DATA_PHASE:
case EP0_OUT_DATA_PHASE:
case EP0_UNCONNECTED:
case EP0_STALL:
break;
}
}
void dwc3_ep0_interrupt(struct dwc3 *dwc,
const const struct dwc3_event_depevt *event)
{
u8 epnum = event->endpoint_number;
dev_dbg(dwc->dev, "%s while ep%d%s in state '%s'\n",
dwc3_ep_event_string(event->endpoint_event),
epnum, (epnum & 1) ? "in" : "out",
dwc3_ep0_state_string(dwc->ep0state));
switch (event->endpoint_event) {
case DWC3_DEPEVT_XFERCOMPLETE:
dwc3_ep0_xfer_complete(dwc, event);
break;
case DWC3_DEPEVT_XFERNOTREADY:
dwc3_ep0_xfernotready(dwc, event);
break;
case DWC3_DEPEVT_XFERINPROGRESS:
case DWC3_DEPEVT_RXTXFIFOEVT:
case DWC3_DEPEVT_STREAMEVT:
case DWC3_DEPEVT_EPCMDCMPLT:
break;
}
}

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/**
* gadget.h - DesignWare USB3 DRD Gadget Header
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __DRIVERS_USB_DWC3_GADGET_H
#define __DRIVERS_USB_DWC3_GADGET_H
#include <linux/list.h>
#include <linux/usb/gadget.h>
#include "io.h"
struct dwc3;
#define to_dwc3_ep(ep) (container_of(ep, struct dwc3_ep, endpoint))
#define gadget_to_dwc(g) (container_of(g, struct dwc3, gadget))
/**
* struct dwc3_gadget_ep_depcfg_param1 - DEPCMDPAR0 for DEPCFG command
* @interrupt_number: self-explanatory
* @reserved7_5: set to zero
* @xfer_complete_enable: event generated when transfer completed
* @xfer_in_progress_enable: event generated when transfer in progress
* @xfer_not_ready_enable: event generated when transfer not read
* @fifo_error_enable: generates events when FIFO Underrun (IN eps)
* or FIFO Overrun (OUT) eps
* @reserved_12: set to zero
* @stream_event_enable: event generated on stream
* @reserved14_15: set to zero
* @binterval_m1: bInterval minus 1
* @stream_capable: this EP is capable of handling streams
* @ep_number: self-explanatory
* @bulk_based: Set to ‘1’ if this isochronous endpoint represents a bulk
* data stream that ignores the relationship of bus time to the
* intervals programmed in TRBs.
* @fifo_based: Set to ‘1’ if this isochronous endpoint represents a
* FIFO-based data stream where TRBs have fixed values and are never
* written back by the core.
*/
struct dwc3_gadget_ep_depcfg_param1 {
u32 interrupt_number:5;
u32 reserved7_5:3; /* set to zero */
u32 xfer_complete_enable:1;
u32 xfer_in_progress_enable:1;
u32 xfer_not_ready_enable:1;
u32 fifo_error_enable:1; /* IN-underrun, OUT-overrun */
u32 reserved12:1; /* set to zero */
u32 stream_event_enable:1;
u32 reserved14_15:2;
u32 binterval_m1:8; /* bInterval minus 1 */
u32 stream_capable:1;
u32 ep_number:5;
u32 bulk_based:1;
u32 fifo_based:1;
} __packed;
/**
* struct dwc3_gadget_ep_depcfg_param0 - Parameter 0 for DEPCFG
* @reserved0: set to zero
* @ep_type: Endpoint Type (control, bulk, iso, interrupt)
* @max_packet_size: max packet size in bytes
* @reserved16_14: set to zero
* @fifo_number: self-explanatory
* @burst_size: burst size minus 1
* @data_sequence_number: Must be 0 when an endpoint is initially configured
* May be non-zero when an endpoint is configured after a power transition
* that requires a save/restore.
* @ignore_sequence_number: Set to ‘1’ to avoid resetting the sequence
* number. This setting is used by software to modify the DEPEVTEN
* event enable bits without modifying other endpoint settings.
*/
struct dwc3_gadget_ep_depcfg_param0 {
u32 reserved0:1;
u32 ep_type:2;
u32 max_packet_size:11;
u32 reserved16_14:3;
u32 fifo_number:5;
u32 burst_size:4;
u32 data_sequence_number:5;
u32 ignore_sequence_number:1;
} __packed;
/**
* struct dwc3_gadget_ep_depxfercfg_param0 - Parameter 0 of DEPXFERCFG
* @number_xfer_resources: Defines the number of Transfer Resources allocated
* to this endpoint. This field must be set to 1.
* @reserved16_31: set to zero;
*/
struct dwc3_gadget_ep_depxfercfg_param0 {
u32 number_xfer_resources:16;
u32 reserved16_31:16;
} __packed;
/**
* struct dwc3_gadget_ep_depstrtxfer_param1 - Parameter 1 of DEPSTRTXFER
* @transfer_desc_addr_low: Indicates the lower 32 bits of the external
* memory's start address for the transfer descriptor. Because TRBs
* must be aligned to a 16-byte boundary, the lower 4 bits of this
* address must be 0.
*/
struct dwc3_gadget_ep_depstrtxfer_param1 {
u32 transfer_desc_addr_low;
} __packed;
/**
* struct dwc3_gadget_ep_depstrtxfer_param1 - Parameter 1 of DEPSTRTXFER
* @transfer_desc_addr_high: Indicates the higher 32 bits of the external
* memory’s start address for the transfer descriptor.
*/
struct dwc3_gadget_ep_depstrtxfer_param0 {
u32 transfer_desc_addr_high;
} __packed;
struct dwc3_gadget_ep_cmd_params {
union {
u32 raw;
} param2;
union {
u32 raw;
struct dwc3_gadget_ep_depcfg_param1 depcfg;
struct dwc3_gadget_ep_depstrtxfer_param1 depstrtxfer;
} param1;
union {
u32 raw;
struct dwc3_gadget_ep_depcfg_param0 depcfg;
struct dwc3_gadget_ep_depxfercfg_param0 depxfercfg;
struct dwc3_gadget_ep_depstrtxfer_param0 depstrtxfer;
} param0;
} __packed;
/* -------------------------------------------------------------------------- */
struct dwc3_request {
struct usb_request request;
struct list_head list;
struct dwc3_ep *dep;
u8 epnum;
struct dwc3_trb_hw *trb;
dma_addr_t trb_dma;
unsigned direction:1;
unsigned mapped:1;
unsigned queued:1;
};
#define to_dwc3_request(r) (container_of(r, struct dwc3_request, request))
static inline struct dwc3_request *next_request(struct list_head *list)
{
if (list_empty(list))
return NULL;
return list_first_entry(list, struct dwc3_request, list);
}
static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req)
{
struct dwc3_ep *dep = req->dep;
req->queued = true;
list_move_tail(&req->list, &dep->req_queued);
}
#if defined(CONFIG_USB_GADGET_DWC3) || defined(CONFIG_USB_GADGET_DWC3_MODULE)
int dwc3_gadget_init(struct dwc3 *dwc);
void dwc3_gadget_exit(struct dwc3 *dwc);
#else
static inline int dwc3_gadget_init(struct dwc3 *dwc) { return 0; }
static inline void dwc3_gadget_exit(struct dwc3 *dwc) { }
#endif
void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
int status);
void dwc3_ep0_interrupt(struct dwc3 *dwc, const struct dwc3_event_depevt *event);
void dwc3_ep0_out_start(struct dwc3 *dwc);
int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
gfp_t gfp_flags);
int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value);
int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
unsigned cmd, struct dwc3_gadget_ep_cmd_params *params);
void dwc3_map_buffer_to_dma(struct dwc3_request *req);
void dwc3_unmap_buffer_from_dma(struct dwc3_request *req);
/**
* dwc3_gadget_ep_get_transfer_index - Gets transfer index from HW
* @dwc: DesignWare USB3 Pointer
* @number: DWC endpoint number
*
* Caller should take care of locking
*/
static inline u32 dwc3_gadget_ep_get_transfer_index(struct dwc3 *dwc, u8 number)
{
u32 res_id;
res_id = dwc3_readl(dwc->regs, DWC3_DEPCMD(number));
return DWC3_DEPCMD_GET_RSC_IDX(res_id);
}
/**
* dwc3_gadget_event_string - returns event name
* @event: the event code
*/
static inline const char *dwc3_gadget_event_string(u8 event)
{
switch (event) {
case DWC3_DEVICE_EVENT_DISCONNECT:
return "Disconnect";
case DWC3_DEVICE_EVENT_RESET:
return "Reset";
case DWC3_DEVICE_EVENT_CONNECT_DONE:
return "Connection Done";
case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
return "Link Status Change";
case DWC3_DEVICE_EVENT_WAKEUP:
return "WakeUp";
case DWC3_DEVICE_EVENT_EOPF:
return "End-Of-Frame";
case DWC3_DEVICE_EVENT_SOF:
return "Start-Of-Frame";
case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
return "Erratic Error";
case DWC3_DEVICE_EVENT_CMD_CMPL:
return "Command Complete";
case DWC3_DEVICE_EVENT_OVERFLOW:
return "Overflow";
}
return "UNKNOWN";
}
/**
* dwc3_ep_event_string - returns event name
* @event: then event code
*/
static inline const char *dwc3_ep_event_string(u8 event)
{
switch (event) {
case DWC3_DEPEVT_XFERCOMPLETE:
return "Transfer Complete";
case DWC3_DEPEVT_XFERINPROGRESS:
return "Transfer In-Progress";
case DWC3_DEPEVT_XFERNOTREADY:
return "Transfer Not Ready";
case DWC3_DEPEVT_RXTXFIFOEVT:
return "FIFO";
case DWC3_DEPEVT_STREAMEVT:
return "Stream";
case DWC3_DEPEVT_EPCMDCMPLT:
return "Endpoint Command Complete";
}
return "UNKNOWN";
}
#endif /* __DRIVERS_USB_DWC3_GADGET_H */

55
drivers/usb/dwc3/io.h Normal file
View File

@ -0,0 +1,55 @@
/**
* io.h - DesignWare USB3 DRD IO Header
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
* All rights reserved.
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the above-listed copyright holders may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* ALTERNATIVELY, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2, as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __DRIVERS_USB_DWC3_IO_H
#define __DRIVERS_USB_DWC3_IO_H
#include <asm/io.h>
static inline u32 dwc3_readl(void __iomem *base, u32 offset)
{
return readl(base + offset);
}
static inline void dwc3_writel(void __iomem *base, u32 offset, u32 value)
{
writel(value, base + offset);
}
#endif /* __DRIVERS_USB_DWC3_IO_H */

12
drivers/usb/gadget/Kconfig
View File

@ -303,6 +303,18 @@ config USB_PXA_U2O
PXA9xx Processor series include a high speed USB2.0 device
controller, which support high speed and full speed USB peripheral.
config USB_GADGET_DWC3
tristate "DesignWare USB3.0 (DRD) Controller"
depends on USB_DWC3
select USB_GADGET_DUALSPEED
select USB_GADGET_SUPERSPEED
help
DesignWare USB3.0 controller is a SuperSpeed USB3.0 Controller
which can be configured for peripheral-only, host-only, hub-only
and Dual-Role operation. This Controller was first integrated into
the OMAP5 series of processors. More information about the OMAP5
version of this controller, refer to http://www.ti.com/omap5.
#
# Controllers available in both integrated and discrete versions
#