staging: dwc2: add platform device bindings
This adds a dwc_platform.ko module that can be loaded by using compatible = "snps,dwc2" in a device tree. Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl> Signed-off-by: Paul Zimmerman <paulz@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -0,0 +1,15 @@
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Platform DesignWare HS OTG USB 2.0 controller
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-----------------------------------------------------
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Required properties:
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- compatible : "snps,dwc2"
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- reg : Should contain 1 register range (address and length)
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- interrupts : Should contain 1 interrupt
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Example:
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usb@101c0000 {
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compatible = "ralink,rt3050-usb, snps,dwc2";
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reg = <0x101c0000 40000>;
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interrupts = <18>;
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};
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@ -8,9 +8,11 @@ config USB_DWC2
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USB controller based on the DesignWare HSOTG IP Core.
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USB controller based on the DesignWare HSOTG IP Core.
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If you choose to build this driver as dynamically linked
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If you choose to build this driver as dynamically linked
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modules, the core module will be called dwc2.ko, and the
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modules, the core module will be called dwc2.ko, the
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PCI bus interface module (if you have a PCI bus system)
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PCI bus interface module (if you have a PCI bus system)
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will be called dwc2_pci.ko.
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will be called dwc2_pci.ko and the platform interface module
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(for controllers directly connected to the CPU) will be called
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dwc2_platform.ko.
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NOTE: This driver at present only implements the Host mode
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NOTE: This driver at present only implements the Host mode
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of the controller. The existing s3c-hsotg driver supports
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of the controller. The existing s3c-hsotg driver supports
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@ -19,5 +19,7 @@ dwc2-y += hcd_queue.o hcd_ddma.o
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ifneq ($(CONFIG_PCI),)
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ifneq ($(CONFIG_PCI),)
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obj-$(CONFIG_USB_DWC2) += dwc2_pci.o
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obj-$(CONFIG_USB_DWC2) += dwc2_pci.o
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endif
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endif
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obj-$(CONFIG_USB_DWC2) += dwc2_platform.o
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dwc2_pci-y += pci.o
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dwc2_pci-y += pci.o
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dwc2_platform-y += platform.o
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@ -2693,6 +2693,7 @@ void dwc2_set_all_params(struct dwc2_core_params *params, int value)
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for (i = 0; i < size; i++)
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for (i = 0; i < size; i++)
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p[i] = -1;
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p[i] = -1;
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}
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}
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EXPORT_SYMBOL_GPL(dwc2_set_all_params);
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/*
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/*
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* Initializes the HCD. This function allocates memory for and initializes the
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* Initializes the HCD. This function allocates memory for and initializes the
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@ -0,0 +1,145 @@
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/*
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* platform.c - DesignWare HS OTG Controller platform driver
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*
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* Copyright (C) Matthijs Kooijman <matthijs@stdin.nl>
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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") as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any
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* later version.
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/platform_device.h>
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#include "core.h"
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#include "hcd.h"
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static const char dwc2_driver_name[] = "dwc2";
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/**
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* dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the
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* DWC_otg driver
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*
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* @dev: Platform device
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*
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* This routine is called, for example, when the rmmod command is executed. The
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* device may or may not be electrically present. If it is present, the driver
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* stops device processing. Any resources used on behalf of this device are
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* freed.
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*/
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static int dwc2_driver_remove(struct platform_device *dev)
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{
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struct dwc2_hsotg *hsotg = platform_get_drvdata(dev);
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dwc2_hcd_remove(hsotg);
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return 0;
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}
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/**
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* dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg
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* driver
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*
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* @dev: Platform device
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*
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* This routine creates the driver components required to control the device
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* (core, HCD, and PCD) and initializes the device. The driver components are
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* stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved
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* in the device private data. This allows the driver to access the dwc2_hsotg
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* structure on subsequent calls to driver methods for this device.
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*/
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static int dwc2_driver_probe(struct platform_device *dev)
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{
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struct dwc2_hsotg *hsotg;
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struct resource *res;
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int retval;
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int irq;
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struct dwc2_core_params params;
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/* Default all params to autodetect */
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dwc2_set_all_params(¶ms, -1);
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hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);
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if (!hsotg)
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return -ENOMEM;
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hsotg->dev = &dev->dev;
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irq = platform_get_irq(dev, 0);
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if (irq < 0) {
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dev_err(&dev->dev, "missing IRQ resource\n");
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return -EINVAL;
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}
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res = platform_get_resource(dev, IORESOURCE_MEM, 0);
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if (!res) {
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dev_err(&dev->dev, "missing memory base resource\n");
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return -EINVAL;
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}
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hsotg->regs = devm_ioremap_resource(&dev->dev, res);
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if (IS_ERR(hsotg->regs))
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return PTR_ERR(hsotg->regs);
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dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",
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(unsigned long)res->start, hsotg->regs);
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retval = dwc2_hcd_init(hsotg, irq, ¶ms);
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if (retval)
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return retval;
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platform_set_drvdata(dev, hsotg);
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return retval;
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}
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static const struct of_device_id dwc2_of_match_table[] = {
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{ .compatible = "snps,dwc2" },
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{},
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};
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MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
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static struct platform_driver dwc2_platform_driver = {
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.driver = {
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.name = (char *)dwc2_driver_name,
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.of_match_table = dwc2_of_match_table,
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},
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.probe = dwc2_driver_probe,
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.remove = dwc2_driver_remove,
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};
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module_platform_driver(dwc2_platform_driver);
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MODULE_DESCRIPTION("DESIGNWARE HS OTG Platform Glue");
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MODULE_AUTHOR("Matthijs Kooijman <matthijs@stdin.nl>");
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MODULE_LICENSE("Dual BSD/GPL");
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