forked from Minki/linux
68907a7743
this patch adds basic PM support for the PCI glue layer. Signed-off-by: Felipe Balbi <balbi@ti.com>
265 lines
6.4 KiB
C
265 lines
6.4 KiB
C
/**
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* dwc3-pci.c - PCI Specific glue layer
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*
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* Copyright (C) 2010-2011 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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* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/nop-usb-xceiv.h>
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/* FIXME define these in <linux/pci_ids.h> */
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#define PCI_VENDOR_ID_SYNOPSYS 0x16c3
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
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struct dwc3_pci {
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struct device *dev;
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struct platform_device *dwc3;
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struct platform_device *usb2_phy;
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struct platform_device *usb3_phy;
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};
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static int dwc3_pci_register_phys(struct dwc3_pci *glue)
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{
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struct nop_usb_xceiv_platform_data pdata;
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struct platform_device *pdev;
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int ret;
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memset(&pdata, 0x00, sizeof(pdata));
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pdev = platform_device_alloc("nop_usb_xceiv", 0);
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if (!pdev)
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return -ENOMEM;
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glue->usb2_phy = pdev;
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pdata.type = USB_PHY_TYPE_USB2;
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ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
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if (ret)
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goto err1;
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pdev = platform_device_alloc("nop_usb_xceiv", 1);
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if (!pdev) {
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ret = -ENOMEM;
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goto err1;
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}
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glue->usb3_phy = pdev;
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pdata.type = USB_PHY_TYPE_USB3;
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ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
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if (ret)
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goto err2;
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ret = platform_device_add(glue->usb2_phy);
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if (ret)
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goto err2;
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ret = platform_device_add(glue->usb3_phy);
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if (ret)
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goto err3;
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return 0;
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err3:
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platform_device_del(glue->usb2_phy);
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err2:
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platform_device_put(glue->usb3_phy);
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err1:
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platform_device_put(glue->usb2_phy);
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return ret;
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}
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static int dwc3_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 *dwc3;
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struct dwc3_pci *glue;
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int ret = -ENOMEM;
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struct device *dev = &pci->dev;
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glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
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if (!glue) {
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dev_err(dev, "not enough memory\n");
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return -ENOMEM;
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}
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glue->dev = dev;
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ret = pci_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_power_state(pci, PCI_D0);
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pci_set_master(pci);
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ret = dwc3_pci_register_phys(glue);
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if (ret) {
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dev_err(dev, "couldn't register PHYs\n");
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return ret;
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}
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dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
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if (!dwc3) {
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dev_err(dev, "couldn't allocate dwc3 device\n");
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ret = -ENOMEM;
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goto err1;
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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 = "dwc_usb3";
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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 = "dwc_usb3";
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res[1].flags = IORESOURCE_IRQ;
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ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(dev, "couldn't add resources to dwc3 device\n");
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goto err1;
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}
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pci_set_drvdata(pci, glue);
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dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
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dwc3->dev.dma_mask = dev->dma_mask;
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dwc3->dev.dma_parms = dev->dma_parms;
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dwc3->dev.parent = dev;
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glue->dwc3 = dwc3;
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ret = platform_device_add(dwc3);
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if (ret) {
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dev_err(dev, "failed to register dwc3 device\n");
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goto err3;
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}
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return 0;
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err3:
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pci_set_drvdata(pci, NULL);
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platform_device_put(dwc3);
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err1:
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pci_disable_device(pci);
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return ret;
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}
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static void dwc3_pci_remove(struct pci_dev *pci)
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{
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struct dwc3_pci *glue = pci_get_drvdata(pci);
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platform_device_unregister(glue->usb2_phy);
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platform_device_unregister(glue->usb3_phy);
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platform_device_unregister(glue->dwc3);
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pci_set_drvdata(pci, NULL);
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pci_disable_device(pci);
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}
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static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
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},
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{ } /* Terminating Entry */
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};
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MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
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#ifdef CONFIG_PM
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static int dwc3_pci_suspend(struct device *dev)
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{
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struct pci_dev *pci = to_pci_dev(dev);
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pci_disable_device(pci);
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return 0;
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}
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static int dwc3_pci_resume(struct device *dev)
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{
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struct pci_dev *pci = to_pci_dev(dev);
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int ret;
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ret = pci_enable_device(pci);
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if (ret) {
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dev_err(dev, "can't re-enable device --> %d\n", ret);
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return ret;
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}
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pci_set_master(pci);
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return 0;
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}
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static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
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};
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#define DEV_PM_OPS (&dwc3_pci_dev_pm_ops)
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#else
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#define DEV_PM_OPS NULL
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#endif /* CONFIG_PM */
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static struct pci_driver dwc3_pci_driver = {
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.name = "dwc3-pci",
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.id_table = dwc3_pci_id_table,
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.probe = dwc3_pci_probe,
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.remove = dwc3_pci_remove,
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.driver = {
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.pm = DEV_PM_OPS,
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},
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};
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MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
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module_pci_driver(dwc3_pci_driver);
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