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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dw_mmc-pci.c (2458B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * Synopsys DesignWare Multimedia Card PCI Interface driver
      4 *
      5 * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
      6 */
      7
      8#include <linux/interrupt.h>
      9#include <linux/module.h>
     10#include <linux/io.h>
     11#include <linux/irq.h>
     12#include <linux/pci.h>
     13#include <linux/pm_runtime.h>
     14#include <linux/slab.h>
     15#include <linux/mmc/host.h>
     16#include <linux/mmc/mmc.h>
     17#include "dw_mmc.h"
     18
     19#define PCI_BAR_NO 2
     20#define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
     21#define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
     22/* Defining the Capabilities */
     23#define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
     24				MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
     25				MMC_CAP_SDIO_IRQ)
     26
     27static struct dw_mci_board pci_board_data = {
     28	.caps				= DW_MCI_CAPABILITIES,
     29	.bus_hz				= 33 * 1000 * 1000,
     30	.detect_delay_ms		= 200,
     31	.fifo_depth			= 32,
     32};
     33
     34static int dw_mci_pci_probe(struct pci_dev *pdev,
     35			    const struct pci_device_id *entries)
     36{
     37	struct dw_mci *host;
     38	int ret;
     39
     40	ret = pcim_enable_device(pdev);
     41	if (ret)
     42		return ret;
     43
     44	host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
     45	if (!host)
     46		return -ENOMEM;
     47
     48	host->irq = pdev->irq;
     49	host->irq_flags = IRQF_SHARED;
     50	host->dev = &pdev->dev;
     51	host->pdata = &pci_board_data;
     52
     53	ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
     54	if (ret)
     55		return ret;
     56
     57	host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];
     58
     59	pci_set_master(pdev);
     60
     61	ret = dw_mci_probe(host);
     62	if (ret)
     63		return ret;
     64
     65	pci_set_drvdata(pdev, host);
     66
     67	return 0;
     68}
     69
     70static void dw_mci_pci_remove(struct pci_dev *pdev)
     71{
     72	struct dw_mci *host = pci_get_drvdata(pdev);
     73
     74	dw_mci_remove(host);
     75}
     76
     77static const struct dev_pm_ops dw_mci_pci_dev_pm_ops = {
     78	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
     79				pm_runtime_force_resume)
     80	SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
     81			   dw_mci_runtime_resume,
     82			   NULL)
     83};
     84
     85static const struct pci_device_id dw_mci_pci_id[] = {
     86	{ PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
     87	{}
     88};
     89MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
     90
     91static struct pci_driver dw_mci_pci_driver = {
     92	.name		= "dw_mmc_pci",
     93	.id_table	= dw_mci_pci_id,
     94	.probe		= dw_mci_pci_probe,
     95	.remove		= dw_mci_pci_remove,
     96	.driver		=	{
     97		.pm =   &dw_mci_pci_dev_pm_ops,
     98	},
     99};
    100
    101module_pci_driver(dw_mci_pci_driver);
    102
    103MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
    104MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
    105MODULE_LICENSE("GPL v2");