cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ci_hdrc_pci.c (4355B)

      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");