1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * ci_hdrc_pci.c - MIPS USB IP core family device controller
  4 *
  5 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
  6 *
  7 * Author: David Lopo
  8 */
  9
 10#include <linux/platform_device.h>
 11#include <linux/module.h>
 12#include <linux/pci.h>
 13#include <linux/interrupt.h>
 14#include <linux/usb/gadget.h>
 15#include <linux/usb/chipidea.h>
 16#include <linux/usb/usb_phy_generic.h>
 17
 18/* driver name */
 19#define UDC_DRIVER_NAME   "ci_hdrc_pci"
 20
 21struct ci_hdrc_pci {
 22	struct platform_device	*ci;
 23	struct platform_device	*phy;
 24};
 25
 26/******************************************************************************
 27 * PCI block
 28 *****************************************************************************/
 29static struct ci_hdrc_platform_data pci_platdata = {
 30	.name		= UDC_DRIVER_NAME,
 31	.capoffset	= DEF_CAPOFFSET,
 32};
 33
 34static struct ci_hdrc_platform_data langwell_pci_platdata = {
 35	.name		= UDC_DRIVER_NAME,
 36	.capoffset	= 0,
 37};
 38
 39static struct ci_hdrc_platform_data penwell_pci_platdata = {
 40	.name		= UDC_DRIVER_NAME,
 41	.capoffset	= 0,
 42	.power_budget	= 200,
 43};
 44
 45/**
 46 * ci_hdrc_pci_probe: PCI probe
 47 * @pdev: USB device controller being probed
 48 * @id:   PCI hotplug ID connecting controller to UDC framework
 49 *
 50 * This function returns an error code
 51 * Allocates basic PCI resources for this USB device controller, and then
 52 * invokes the udc_probe() method to start the UDC associated with it
 53 */
 54static int ci_hdrc_pci_probe(struct pci_dev *pdev,
 55				       const struct pci_device_id *id)
 56{
 57	struct ci_hdrc_platform_data *platdata = (void *)id->driver_data;
 58	struct ci_hdrc_pci *ci;
 59	struct resource res[3];
 60	int retval = 0, nres = 2;
 61
 62	if (!platdata) {
 63		dev_err(&pdev->dev, "device doesn't provide driver data\n");
 64		return -ENODEV;
 65	}
 66
 67	ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
 68	if (!ci)
 69		return -ENOMEM;
 70
 71	retval = pcim_enable_device(pdev);
 72	if (retval)
 73		return retval;
 74
 75	if (!pdev->irq) {
 76		dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
 77		return -ENODEV;
 78	}
 79
 80	pci_set_master(pdev);
 81	pci_try_set_mwi(pdev);
 82
 83	/* register a nop PHY */
 84	ci->phy = usb_phy_generic_register();
 85	if (IS_ERR(ci->phy))
 86		return PTR_ERR(ci->phy);
 87
 88	memset(res, 0, sizeof(res));
 89	res[0].start	= pci_resource_start(pdev, 0);
 90	res[0].end	= pci_resource_end(pdev, 0);
 91	res[0].flags	= IORESOURCE_MEM;
 92	res[1].start	= pdev->irq;
 93	res[1].flags	= IORESOURCE_IRQ;
 94
 95	ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
 96	if (IS_ERR(ci->ci)) {
 97		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
 98		usb_phy_generic_unregister(ci->phy);
 99		return PTR_ERR(ci->ci);
100	}
101
102	pci_set_drvdata(pdev, ci);
103
104	return 0;
105}
106
107/**
108 * ci_hdrc_pci_remove: PCI remove
109 * @pdev: USB Device Controller being removed
110 *
111 * Reverses the effect of ci_hdrc_pci_probe(),
112 * first invoking the udc_remove() and then releases
113 * all PCI resources allocated for this USB device controller
114 */
115static void ci_hdrc_pci_remove(struct pci_dev *pdev)
116{
117	struct ci_hdrc_pci *ci = pci_get_drvdata(pdev);
118
119	ci_hdrc_remove_device(ci->ci);
120	usb_phy_generic_unregister(ci->phy);
121}
122
123/*
124 * PCI device table
125 * PCI device structure
126 *
127 * Check "pci.h" for details
128 *
129 * Note: ehci-pci driver may try to probe the device first. You have to add an
130 * ID to the bypass_pci_id_table in ehci-pci driver to prevent this.
131 */
132static const struct pci_device_id ci_hdrc_pci_id_table[] = {
133	{
134		PCI_DEVICE(0x153F, 0x1004),
135		.driver_data = (kernel_ulong_t)&pci_platdata,
136	},
137	{
138		PCI_DEVICE(0x153F, 0x1006),
139		.driver_data = (kernel_ulong_t)&pci_platdata,
140	},
141	{
142		PCI_VDEVICE(INTEL, 0x0811),
143		.driver_data = (kernel_ulong_t)&langwell_pci_platdata,
144	},
145	{
146		PCI_VDEVICE(INTEL, 0x0829),
147		.driver_data = (kernel_ulong_t)&penwell_pci_platdata,
148	},
149	{
150		/* Intel Clovertrail */
151		PCI_VDEVICE(INTEL, 0xe006),
152		.driver_data = (kernel_ulong_t)&penwell_pci_platdata,
153	},
154	{ 0 } /* end: all zeroes */
155};
156MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
157
158static struct pci_driver ci_hdrc_pci_driver = {
159	.name         =	UDC_DRIVER_NAME,
160	.id_table     =	ci_hdrc_pci_id_table,
161	.probe        =	ci_hdrc_pci_probe,
162	.remove       =	ci_hdrc_pci_remove,
163};
164
165module_pci_driver(ci_hdrc_pci_driver);
166
167MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
168MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
169MODULE_LICENSE("GPL");
170MODULE_ALIAS("platform:ci13xxx_pci");