mmc/host/dw_mmc-pci.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Synopsys DesignWare Multimedia Card PCI Interface driver
0004  *
0005  * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
0006  */
0007
0008 #include <linux/interrupt.h>
0009 #include <linux/module.h>
0010 #include <linux/io.h>
0011 #include <linux/irq.h>
0012 #include <linux/pci.h>
0013 #include <linux/pm_runtime.h>
0014 #include <linux/slab.h>
0015 #include <linux/mmc/host.h>
0016 #include <linux/mmc/mmc.h>
0017 #include "dw_mmc.h"
0018
0019 #define PCI_BAR_NO 2
0020 #define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
0021 #define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
0022 /* Defining the Capabilities */
0023 #define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
0024                 MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
0025                 MMC_CAP_SDIO_IRQ)
0026
0027 static struct dw_mci_board pci_board_data = {
0028     .caps               = DW_MCI_CAPABILITIES,
0029     .bus_hz             = 33 * 1000 * 1000,
0030     .detect_delay_ms        = 200,
0031     .fifo_depth         = 32,
0032 };
0033
0034 static int dw_mci_pci_probe(struct pci_dev *pdev,
0035                 const struct pci_device_id *entries)
0036 {
0037     struct dw_mci *host;
0038     int ret;
0039
0040     ret = pcim_enable_device(pdev);
0041     if (ret)
0042         return ret;
0043
0044     host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
0045     if (!host)
0046         return -ENOMEM;
0047
0048     host->irq = pdev->irq;
0049     host->irq_flags = IRQF_SHARED;
0050     host->dev = &pdev->dev;
0051     host->pdata = &pci_board_data;
0052
0053     ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
0054     if (ret)
0055         return ret;
0056
0057     host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];
0058
0059     pci_set_master(pdev);
0060
0061     ret = dw_mci_probe(host);
0062     if (ret)
0063         return ret;
0064
0065     pci_set_drvdata(pdev, host);
0066
0067     return 0;
0068 }
0069
0070 static void dw_mci_pci_remove(struct pci_dev *pdev)
0071 {
0072     struct dw_mci *host = pci_get_drvdata(pdev);
0073
0074     dw_mci_remove(host);
0075 }
0076
0077 static const struct dev_pm_ops dw_mci_pci_dev_pm_ops = {
0078     SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
0079                 pm_runtime_force_resume)
0080     SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
0081                dw_mci_runtime_resume,
0082                NULL)
0083 };
0084
0085 static const struct pci_device_id dw_mci_pci_id[] = {
0086     { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
0087     {}
0088 };
0089 MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
0090
0091 static struct pci_driver dw_mci_pci_driver = {
0092     .name       = "dw_mmc_pci",
0093     .id_table   = dw_mci_pci_id,
0094     .probe      = dw_mci_pci_probe,
0095     .remove     = dw_mci_pci_remove,
0096     .driver     =   {
0097         .pm =   &dw_mci_pci_dev_pm_ops,
0098     },
0099 };
0100
0101 module_pci_driver(dw_mci_pci_driver);
0102
0103 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
0104 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
0105 MODULE_LICENSE("GPL v2");