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usb: dwc3: add xHCI Host support
The Designware USB3 IP can be configured with an internal xHCI. If we're running on such a version, let's start the xHCI stack. Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi
parent
0949e99b05
commit
d07e8819a0
@ -2,6 +2,7 @@ config USB_DWC3
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tristate "DesignWare USB3 DRD Core Support"
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depends on (USB || USB_GADGET)
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select USB_OTG_UTILS
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select USB_XHCI_PLATFORM
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help
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Say Y or M here if your system has a Dual Role SuperSpeed
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USB controller based on the DesignWare USB3 IP Core.
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@ -4,11 +4,13 @@ ccflags-$(CONFIG_USB_DWC3_VERBOSE) += -DVERBOSE_DEBUG
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obj-$(CONFIG_USB_DWC3) += dwc3.o
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dwc3-y := core.o
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dwc3-y += host.o
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ifneq ($(CONFIG_USB_GADGET_DWC3),)
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dwc3-y += gadget.o ep0.o
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endif
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ifneq ($(CONFIG_DEBUG_FS),)
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dwc3-y += debugfs.o
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endif
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@ -350,6 +350,8 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
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goto err1;
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}
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dwc->res = res;
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res = request_mem_region(res->start, resource_size(res),
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dev_name(&pdev->dev));
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if (!res) {
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@ -401,8 +403,27 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
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mode = DWC3_MODE(dwc->hwparams.hwparams0);
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switch (mode) {
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case DWC3_MODE_DRD:
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case DWC3_MODE_DEVICE:
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ret = dwc3_gadget_init(dwc);
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if (ret) {
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dev_err(&pdev->dev, "failed to initialize gadget\n");
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goto err4;
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}
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break;
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case DWC3_MODE_HOST:
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ret = dwc3_host_init(dwc);
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if (ret) {
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dev_err(&pdev->dev, "failed to initialize host\n");
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goto err4;
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}
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break;
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case DWC3_MODE_DRD:
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ret = dwc3_host_init(dwc);
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if (ret) {
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dev_err(&pdev->dev, "failed to initialize host\n");
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goto err4;
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}
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ret = dwc3_gadget_init(dwc);
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if (ret) {
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dev_err(&pdev->dev, "failed to initialize gadget\n");
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@ -427,10 +448,16 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
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err5:
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switch (mode) {
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case DWC3_MODE_DRD:
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case DWC3_MODE_DEVICE:
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dwc3_gadget_exit(dwc);
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break;
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case DWC3_MODE_HOST:
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dwc3_host_exit(dwc);
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break;
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case DWC3_MODE_DRD:
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dwc3_host_exit(dwc);
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dwc3_gadget_exit(dwc);
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break;
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default:
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/* do nothing */
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break;
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@ -465,10 +492,16 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
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dwc3_debugfs_exit(dwc);
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switch (dwc->mode) {
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case DWC3_MODE_DRD:
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case DWC3_MODE_DEVICE:
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dwc3_gadget_exit(dwc);
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break;
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case DWC3_MODE_HOST:
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dwc3_host_exit(dwc);
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break;
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case DWC3_MODE_DRD:
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dwc3_host_exit(dwc);
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dwc3_gadget_exit(dwc);
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break;
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default:
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/* do nothing */
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break;
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@ -41,6 +41,7 @@
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <linux/ioport.h>
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#include <linux/list.h>
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#include <linux/dma-mapping.h>
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#include <linux/mm.h>
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@ -560,6 +561,7 @@ struct dwc3_hwparams {
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* @ep0_bounce_addr: dma address of ep0_bounce
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* @lock: for synchronizing
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* @dev: pointer to our struct device
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* @xhci: pointer to our xHCI child
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* @event_buffer_list: a list of event buffers
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* @gadget: device side representation of the peripheral controller
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* @gadget_driver: pointer to the gadget driver
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@ -598,6 +600,9 @@ struct dwc3 {
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spinlock_t lock;
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struct device *dev;
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struct platform_device *xhci;
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struct resource *res;
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struct dwc3_event_buffer *ev_buffs[DWC3_EVENT_BUFFERS_MAX];
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struct dwc3_ep *eps[DWC3_ENDPOINTS_NUM];
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@ -782,4 +787,8 @@ union dwc3_event {
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#define DWC3_HAS_XHCI BIT(1)
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#define DWC3_HAS_OTG BIT(3)
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/* prototypes */
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int dwc3_host_init(struct dwc3 *dwc);
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void dwc3_host_exit(struct dwc3 *dwc);
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#endif /* __DRIVERS_USB_DWC3_CORE_H */
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116
drivers/usb/dwc3/host.c
Normal file
116
drivers/usb/dwc3/host.c
Normal file
@ -0,0 +1,116 @@
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/**
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* host.c - DesignWare USB3 DRD Controller Host Glue
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The names of the above-listed copyright holders may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2, as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <linux/list.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include "core.h"
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#include "io.h"
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#include "debug.h"
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static struct resource generic_resources[] = {
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{
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.flags = IORESOURCE_IRQ,
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},
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{
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.flags = IORESOURCE_MEM,
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},
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};
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int dwc3_host_init(struct dwc3 *dwc)
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{
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struct platform_device *xhci;
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int ret;
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xhci = platform_device_alloc("xhci", -1);
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if (!xhci) {
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dev_err(dwc->dev, "couldn't allocate xHCI device\n");
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ret = -ENOMEM;
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goto err0;
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}
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dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
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xhci->dev.parent = dwc->dev;
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xhci->dev.dma_mask = dwc->dev->dma_mask;
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xhci->dev.dma_parms = dwc->dev->dma_parms;
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dwc->xhci = xhci;
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/* setup resources */
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generic_resources[0].start = dwc->irq;
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generic_resources[1].start = dwc->res->start;
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generic_resources[1].end = dwc->res->start + 0x7fff;
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ret = platform_device_add_resources(xhci, generic_resources,
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ARRAY_SIZE(generic_resources));
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if (ret) {
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dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
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goto err1;
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}
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ret = platform_device_add(xhci);
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if (ret) {
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dev_err(dwc->dev, "failed to register xHCI device\n");
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goto err1;
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}
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return 0;
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err1:
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platform_device_put(xhci);
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err0:
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return ret;
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}
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void dwc3_host_exit(struct dwc3 *dwc)
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{
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platform_device_unregister(dwc->xhci);
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}
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