/**
   * dwc3-pci.c - PCI Specific glue layer
   *
   * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com

   *
   * Authors: Felipe Balbi <balbi@ti.com>,
   *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   *

   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2  of
   * the License as published by the Free Software Foundation.

   *

   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.

   */
  
  #include <linux/kernel.h>

  #include <linux/module.h>

  #include <linux/slab.h>
  #include <linux/pci.h>
  #include <linux/platform_device.h>

  #include <linux/usb/otg.h>

  #include <linux/usb/usb_phy_generic.h>

  #include "platform_data.h"

  /* FIXME define these in <linux/pci_ids.h> */
  #define PCI_VENDOR_ID_SYNOPSYS		0x16c3
  #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3	0xabcd

  #define PCI_DEVICE_ID_INTEL_BYT		0x0f37

  #define PCI_DEVICE_ID_INTEL_MRFLD	0x119e

  #define PCI_DEVICE_ID_INTEL_BSW		0x22B7

  #define PCI_DEVICE_ID_INTEL_SPTLP	0x9d30
  #define PCI_DEVICE_ID_INTEL_SPTH	0xa130

  struct dwc3_pci {
  	struct device		*dev;
  	struct platform_device	*dwc3;

  	struct platform_device	*usb2_phy;
  	struct platform_device	*usb3_phy;

  };

  static int dwc3_pci_register_phys(struct dwc3_pci *glue)

  {

  	struct usb_phy_generic_platform_data pdata;

  	struct platform_device	*pdev;
  	int			ret;
  
  	memset(&pdata, 0x00, sizeof(pdata));

  	pdev = platform_device_alloc("usb_phy_generic", 0);

  	if (!pdev)
  		return -ENOMEM;
  
  	glue->usb2_phy = pdev;
  	pdata.type = USB_PHY_TYPE_USB2;

  	pdata.gpio_reset = -1;

  
  	ret = platform_device_add_data(glue->usb2_phy, &pdata, sizeof(pdata));
  	if (ret)
  		goto err1;

  	pdev = platform_device_alloc("usb_phy_generic", 1);

  	if (!pdev) {
  		ret = -ENOMEM;
  		goto err1;
  	}
  
  	glue->usb3_phy = pdev;
  	pdata.type = USB_PHY_TYPE_USB3;
  
  	ret = platform_device_add_data(glue->usb3_phy, &pdata, sizeof(pdata));
  	if (ret)
  		goto err2;
  
  	ret = platform_device_add(glue->usb2_phy);
  	if (ret)
  		goto err2;
  
  	ret = platform_device_add(glue->usb3_phy);
  	if (ret)
  		goto err3;
  
  	return 0;
  
  err3:
  	platform_device_del(glue->usb2_phy);
  
  err2:
  	platform_device_put(glue->usb3_phy);
  
  err1:
  	platform_device_put(glue->usb2_phy);
  
  	return ret;
  }

  static int dwc3_pci_probe(struct pci_dev *pci,

  		const struct pci_device_id *id)
  {
  	struct resource		res[2];
  	struct platform_device	*dwc3;
  	struct dwc3_pci		*glue;

  	int			ret;

  	struct device		*dev = &pci->dev;

  	struct dwc3_platform_data dwc3_pdata;
  
  	memset(&dwc3_pdata, 0x00, sizeof(dwc3_pdata));

  	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);

  	if (!glue)

  		return -ENOMEM;

  	glue->dev = dev;

  	ret = pcim_enable_device(pci);

  	if (ret) {

  		dev_err(dev, "failed to enable pci device
  ");
  		return -ENODEV;

  	}

  	pci_set_master(pci);

  	ret = dwc3_pci_register_phys(glue);
  	if (ret) {
  		dev_err(dev, "couldn't register PHYs
  ");
  		return ret;
  	}

  	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);

  	if (!dwc3) {

  		dev_err(dev, "couldn't allocate dwc3 device
  ");

  		return -ENOMEM;

  	}
  
  	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	= "dwc_usb3";
  	res[0].flags	= IORESOURCE_MEM;
  
  	res[1].start	= pci->irq;
  	res[1].name	= "dwc_usb3";
  	res[1].flags	= IORESOURCE_IRQ;

  	if (pci->vendor == PCI_VENDOR_ID_AMD &&
  			pci->device == PCI_DEVICE_ID_AMD_NL_USB) {
  		dwc3_pdata.has_lpm_erratum = true;
  		dwc3_pdata.lpm_nyet_threshold = 0xf;
  
  		dwc3_pdata.u2exit_lfps_quirk = true;
  		dwc3_pdata.u2ss_inp3_quirk = true;
  		dwc3_pdata.req_p1p2p3_quirk = true;
  		dwc3_pdata.del_p1p2p3_quirk = true;
  		dwc3_pdata.del_phy_power_chg_quirk = true;
  		dwc3_pdata.lfps_filter_quirk = true;
  		dwc3_pdata.rx_detect_poll_quirk = true;
  
  		dwc3_pdata.tx_de_emphasis_quirk = true;
  		dwc3_pdata.tx_de_emphasis = 1;
  
  		/*
  		 * FIXME these quirks should be removed when AMD NL
  		 * taps out
  		 */
  		dwc3_pdata.disable_scramble_quirk = true;
  		dwc3_pdata.dis_u3_susphy_quirk = true;
  		dwc3_pdata.dis_u2_susphy_quirk = true;
  	}

  	ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
  	if (ret) {

  		dev_err(dev, "couldn't add resources to dwc3 device
  ");

  		return ret;

  	}
  
  	pci_set_drvdata(pci, glue);

  	ret = platform_device_add_data(dwc3, &dwc3_pdata, sizeof(dwc3_pdata));
  	if (ret)
  		goto err3;

  	dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);

  	dwc3->dev.dma_mask = dev->dma_mask;
  	dwc3->dev.dma_parms = dev->dma_parms;
  	dwc3->dev.parent = dev;

  	glue->dwc3 = dwc3;

  
  	ret = platform_device_add(dwc3);
  	if (ret) {

  		dev_err(dev, "failed to register dwc3 device
  ");
  		goto err3;

  	}
  
  	return 0;

  err3:

  	platform_device_put(dwc3);

  	return ret;
  }

  static void dwc3_pci_remove(struct pci_dev *pci)

  {
  	struct dwc3_pci	*glue = pci_get_drvdata(pci);

  	platform_device_unregister(glue->dwc3);

  	platform_device_unregister(glue->usb2_phy);
  	platform_device_unregister(glue->usb3_phy);

  }

  static const struct pci_device_id dwc3_pci_id_table[] = {

  	{
  		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
  				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
  	},

  	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },

  	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },

  	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },

  	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
  	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },

  	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },

  	{  }	/* Terminating Entry */
  };
  MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);

  #ifdef CONFIG_PM_SLEEP

  static int dwc3_pci_suspend(struct device *dev)
  {
  	struct pci_dev	*pci = to_pci_dev(dev);
  
  	pci_disable_device(pci);
  
  	return 0;
  }
  
  static int dwc3_pci_resume(struct device *dev)
  {
  	struct pci_dev	*pci = to_pci_dev(dev);
  	int		ret;
  
  	ret = pci_enable_device(pci);
  	if (ret) {
  		dev_err(dev, "can't re-enable device --> %d
  ", ret);
  		return ret;
  	}
  
  	pci_set_master(pci);
  
  	return 0;
  }

  #endif /* CONFIG_PM_SLEEP */

  
  static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
  	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
  };

  static struct pci_driver dwc3_pci_driver = {

  	.name		= "dwc3-pci",

  	.id_table	= dwc3_pci_id_table,
  	.probe		= dwc3_pci_probe,

  	.remove		= dwc3_pci_remove,

  	.driver		= {

  		.pm	= &dwc3_pci_dev_pm_ops,

  	},

  };
  
  MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");

  MODULE_LICENSE("GPL v2");

  MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");

  module_pci_driver(dwc3_pci_driver);