dw_mmc-pci.c

  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	SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
 79	RUNTIME_PM_OPS(dw_mci_runtime_suspend, dw_mci_runtime_resume, NULL)
 80};
 81
 82static const struct pci_device_id dw_mci_pci_id[] = {
 83	{ PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
 84	{}
 85};
 86MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
 87
 88static struct pci_driver dw_mci_pci_driver = {
 89	.name		= "dw_mmc_pci",
 90	.id_table	= dw_mci_pci_id,
 91	.probe		= dw_mci_pci_probe,
 92	.remove		= dw_mci_pci_remove,
 93	.driver		=	{
 94		.pm =   pm_ptr(&dw_mci_pci_dev_pm_ops),
 95	},
 96};
 97
 98module_pci_driver(dw_mci_pci_driver);
 99
100MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
101MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
102MODULE_LICENSE("GPL v2");