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// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* pci.c - DesignWare HS OTG Controller PCI driver
*
* Copyright (C) 2004-2013 Synopsys, Inc.
*
* 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") as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version.
*
* 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.
*/
/*
* Provides the initialization and cleanup entry points for the DWC_otg PCI
* driver
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/usb.h>
#include <linux/usb/hcd.h>
#include <linux/usb/ch11.h>
#include <linux/platform_device.h>
#include <linux/usb/usb_phy_generic.h>
#define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
static const char dwc2_driver_name[] = "dwc2-pci";
struct dwc2_pci_glue {
struct platform_device *dwc2;
struct platform_device *phy;
};
static int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2)
{
if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
pdev->device == PCI_PRODUCT_ID_HAPS_HSOTG) {
struct property_entry properties[] = {
{ },
};
return platform_device_add_properties(dwc2, properties);
}
return 0;
}
/**
* dwc2_pci_probe() - Provides the cleanup entry points for the DWC_otg PCI
* driver
*
* @pci: The programming view of DWC_otg PCI
*/
static void dwc2_pci_remove(struct pci_dev *pci)
{
struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
platform_device_unregister(glue->dwc2);
usb_phy_generic_unregister(glue->phy);
pci_set_drvdata(pci, NULL);
}
static int dwc2_pci_probe(struct pci_dev *pci,
const struct pci_device_id *id)
{
struct resource res[2];
struct platform_device *dwc2;
struct platform_device *phy;
int ret;
struct device *dev = &pci->dev;
struct dwc2_pci_glue *glue;
ret = pcim_enable_device(pci);
if (ret) {
dev_err(dev, "failed to enable pci device\n");
return -ENODEV;
}
pci_set_master(pci);
phy = usb_phy_generic_register();
if (IS_ERR(phy)) {
dev_err(dev, "error registering generic PHY (%ld)\n",
PTR_ERR(phy));
return PTR_ERR(phy);
}
dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
if (!dwc2) {
dev_err(dev, "couldn't allocate dwc2 device\n");
goto err;
}
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 = "dwc2";
res[0].flags = IORESOURCE_MEM;
res[1].start = pci->irq;
res[1].name = "dwc2";
res[1].flags = IORESOURCE_IRQ;
ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
if (ret) {
dev_err(dev, "couldn't add resources to dwc2 device\n");
goto err;
}
dwc2->dev.parent = dev;
ret = dwc2_pci_quirks(pci, dwc2);
if (ret)
goto err;
glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
if (!glue) {
ret = -ENOMEM;
goto err;
}
ret = platform_device_add(dwc2);
if (ret) {
dev_err(dev, "failed to register dwc2 device\n");
goto err;
}
glue->phy = phy;
glue->dwc2 = dwc2;
pci_set_drvdata(pci, glue);
return 0;
err:
usb_phy_generic_unregister(phy);
platform_device_put(dwc2);
return ret;
}
static const struct pci_device_id dwc2_pci_ids[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
},
{
PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
PCI_DEVICE_ID_STMICRO_USB_OTG),
},
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
static struct pci_driver dwc2_pci_driver = {
.name = dwc2_driver_name,
.id_table = dwc2_pci_ids,
.probe = dwc2_pci_probe,
.remove = dwc2_pci_remove,
};
module_pci_driver(dwc2_pci_driver);
MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
MODULE_AUTHOR("Synopsys, Inc.");
MODULE_LICENSE("Dual BSD/GPL");
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