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![John Youn](/assets/img/avatar_default.png)
The pci driver now registers a platform driver, like in dwc3, and lets its probe function do all the initialization. This allows it to account for changes to the platform driver that were not added to the pci driver. Also future changes to the probe function don't have to be duplicated. This also has the effect of adding device and DRD mode to the pci driver. Tested on the Synopsys HAPS PCIe platform. Signed-off-by: John Youn <johnyoun@synopsys.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
169 lines
4.7 KiB
C
169 lines
4.7 KiB
C
/*
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* pci.c - DesignWare HS OTG Controller PCI driver
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*
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* Copyright (C) 2004-2013 Synopsys, Inc.
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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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/*
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* Provides the initialization and cleanup entry points for the DWC_otg PCI
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* driver
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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/moduleparam.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include <linux/usb/ch11.h>
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#include <linux/platform_device.h>
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#include <linux/usb/usb_phy_generic.h>
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#define PCI_PRODUCT_ID_HAPS_HSOTG 0xabc0
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static const char dwc2_driver_name[] = "dwc2-pci";
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struct dwc2_pci_glue {
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struct platform_device *dwc2;
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struct platform_device *phy;
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};
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static void dwc2_pci_remove(struct pci_dev *pci)
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{
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struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
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platform_device_unregister(glue->dwc2);
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usb_phy_generic_unregister(glue->phy);
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kfree(glue);
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pci_set_drvdata(pci, NULL);
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}
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static int dwc2_pci_probe(struct pci_dev *pci,
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const struct pci_device_id *id)
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{
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struct resource res[2];
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struct platform_device *dwc2;
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struct platform_device *phy;
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int ret;
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struct device *dev = &pci->dev;
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struct dwc2_pci_glue *glue;
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ret = pcim_enable_device(pci);
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if (ret) {
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dev_err(dev, "failed to enable pci device\n");
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return -ENODEV;
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}
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pci_set_master(pci);
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dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
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if (!dwc2) {
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dev_err(dev, "couldn't allocate dwc2 device\n");
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return -ENOMEM;
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}
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memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
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res[0].start = pci_resource_start(pci, 0);
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res[0].end = pci_resource_end(pci, 0);
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res[0].name = "dwc2";
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res[0].flags = IORESOURCE_MEM;
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res[1].start = pci->irq;
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res[1].name = "dwc2";
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res[1].flags = IORESOURCE_IRQ;
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ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(dev, "couldn't add resources to dwc2 device\n");
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return ret;
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}
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dwc2->dev.parent = dev;
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phy = usb_phy_generic_register();
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if (IS_ERR(phy)) {
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dev_err(dev, "error registering generic PHY (%ld)\n",
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PTR_ERR(phy));
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return PTR_ERR(phy);
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}
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ret = platform_device_add(dwc2);
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if (ret) {
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dev_err(dev, "failed to register dwc2 device\n");
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goto err;
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}
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glue = kzalloc(sizeof(*glue), GFP_KERNEL);
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if (!glue)
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return -ENOMEM;
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glue->phy = phy;
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glue->dwc2 = dwc2;
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pci_set_drvdata(pci, glue);
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return 0;
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err:
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usb_phy_generic_unregister(phy);
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platform_device_put(dwc2);
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return ret;
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}
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static const struct pci_device_id dwc2_pci_ids[] = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
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PCI_DEVICE_ID_STMICRO_USB_OTG),
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},
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{ /* end: all zeroes */ }
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};
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MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
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static struct pci_driver dwc2_pci_driver = {
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.name = dwc2_driver_name,
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.id_table = dwc2_pci_ids,
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.probe = dwc2_pci_probe,
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.remove = dwc2_pci_remove,
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};
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module_pci_driver(dwc2_pci_driver);
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MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
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MODULE_AUTHOR("Synopsys, Inc.");
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MODULE_LICENSE("Dual BSD/GPL");
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