usb: dwc2: pci: Add device mode to the dwc2-pci driver

config USB_DWC2_PCI

	tristate "DWC2 PCI"

	depends on USB_DWC2_HOST && PCI

	default USB_DWC2_HOST

	depends on PCI

	default n

	select USB_DWC2_PLATFORM

	help

	  The Designware USB2.0 PCI interface module for controllers

	  connected to a PCI bus. This is only used for host mode.

	  connected to a PCI bus.

config USB_DWC2_DEBUG

	bool "Enable Debugging Messages"

#include <linux/usb/hcd.h>

#include <linux/usb/ch11.h>

#include "core.h"

#include "hcd.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";

static const struct dwc2_core_params dwc2_module_params = {

	.otg_cap			= -1,

	.otg_ver			= -1,

	.dma_enable			= -1,

	.dma_desc_enable		= 0,

	.speed				= -1,

	.enable_dynamic_fifo		= -1,

	.en_multiple_tx_fifo		= -1,

	.host_rx_fifo_size		= 1024,

	.host_nperio_tx_fifo_size	= 256,

	.host_perio_tx_fifo_size	= 1024,

	.max_transfer_size		= 65535,

	.max_packet_count		= 511,

	.host_channels			= -1,

	.phy_type			= -1,

	.phy_utmi_width			= -1,

	.phy_ulpi_ddr			= -1,

	.phy_ulpi_ext_vbus		= -1,

	.i2c_enable			= -1,

	.ulpi_fs_ls			= -1,

	.host_support_fs_ls_low_power	= -1,

	.host_ls_low_power_phy_clk	= -1,

	.ts_dline			= -1,

	.reload_ctl			= -1,

	.ahbcfg				= -1,

	.uframe_sched			= -1,

static const char dwc2_driver_name[] = "dwc2-pci";

struct dwc2_pci_glue {

	struct platform_device *dwc2;

	struct platform_device *phy;

};

/**

 * dwc2_driver_remove() - Called when the DWC_otg core is unregistered with the

 * DWC_otg driver

 *

 * @dev: Bus device

 *

 * This routine is called, for example, when the rmmod command is executed. The

 * device may or may not be electrically present. If it is present, the driver

 * stops device processing. Any resources used on behalf of this device are

 * freed.

 */

static void dwc2_driver_remove(struct pci_dev *dev)

static void dwc2_pci_remove(struct pci_dev *pci)

{

	struct dwc2_hsotg *hsotg = pci_get_drvdata(dev);

	struct dwc2_pci_glue *glue = pci_get_drvdata(pci);

	dwc2_hcd_remove(hsotg);

	pci_disable_device(dev);

	platform_device_unregister(glue->dwc2);

	usb_phy_generic_unregister(glue->phy);

	kfree(glue);

	pci_set_drvdata(pci, NULL);

}

/**

 * dwc2_driver_probe() - Called when the DWC_otg core is bound to the DWC_otg

 * driver

 *

 * @dev: Bus device

 *

 * This routine creates the driver components required to control the device

 * (core, HCD, and PCD) and initializes the device. The driver components are

 * stored in a dwc2_hsotg structure. A reference to the dwc2_hsotg is saved

 * in the device private data. This allows the driver to access the dwc2_hsotg

 * structure on subsequent calls to driver methods for this device.

 */

static int dwc2_driver_probe(struct pci_dev *dev,

static int dwc2_pci_probe(struct pci_dev *pci,

		const struct pci_device_id *id)

{

	struct dwc2_hsotg *hsotg;

	int retval;

	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);

	hsotg = devm_kzalloc(&dev->dev, sizeof(*hsotg), GFP_KERNEL);

	if (!hsotg)

	dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);

	if (!dwc2) {

		dev_err(dev, "couldn't allocate dwc2 device\n");

		return -ENOMEM;

	}

	hsotg->dev = &dev->dev;

	hsotg->regs = devm_ioremap_resource(&dev->dev, &dev->resource[0]);

	if (IS_ERR(hsotg->regs))

		return PTR_ERR(hsotg->regs);

	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));

	dev_dbg(&dev->dev, "mapped PA %08lx to VA %p\n",

		(unsigned long)pci_resource_start(dev, 0), hsotg->regs);

	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;

	if (pci_enable_device(dev) < 0)

		return -ENODEV;

	res[1].start	= pci->irq;

	res[1].name	= "dwc2";

	res[1].flags	= IORESOURCE_IRQ;

	pci_set_master(dev);

	ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));

	if (ret) {

		dev_err(dev, "couldn't add resources to dwc2 device\n");

		return ret;

	}

	retval = devm_request_irq(hsotg->dev, dev->irq,

				  dwc2_handle_common_intr, IRQF_SHARED,

				  dev_name(hsotg->dev), hsotg);

	if (retval)

		return retval;

	dwc2->dev.parent = dev;

	spin_lock_init(&hsotg->lock);

	retval = dwc2_hcd_init(hsotg, dev->irq, &dwc2_module_params);

	if (retval) {

		pci_disable_device(dev);

		return retval;

	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);

	}

	pci_set_drvdata(dev, hsotg);

	ret = platform_device_add(dwc2);

	if (ret) {

		dev_err(dev, "failed to register dwc2 device\n");

		goto err;

	}

	glue = kzalloc(sizeof(*glue), GFP_KERNEL);

	if (!glue)

		return -ENOMEM;

	glue->phy = phy;

	glue->dwc2 = dwc2;

	pci_set_drvdata(pci, glue);

	return retval;

	return 0;

err:

	usb_phy_generic_unregister(phy);

	platform_device_put(dwc2);

	return ret;

}

static const struct pci_device_id dwc2_pci_ids[] = {

static struct pci_driver dwc2_pci_driver = {

	.name = dwc2_driver_name,

	.id_table = dwc2_pci_ids,

	.probe = dwc2_driver_probe,

	.remove = dwc2_driver_remove,

	.probe = dwc2_pci_probe,

	.remove = dwc2_pci_remove,

};

module_pci_driver(dwc2_pci_driver);