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Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/dwc2/pci.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/pci.c b/drivers/usb/dwc2/pci.c new file mode 100644 index 000000000..7afc10872 --- /dev/null +++ b/drivers/usb/dwc2/pci.c @@ -0,0 +1,196 @@ +// 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"); + ret = -ENOMEM; + 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"); |