drivers/mmc/host/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
  27 static 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
  34 static 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
  70 static 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
  77 static 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
  85 static const struct pci_device_id dw_mci_pci_id[] = {
  86         { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
  87         {}
  88 };
  89 MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
  90
  91 static 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
 101 module_pci_driver(dw_mci_pci_driver);
 102
 103 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
 104 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
 105 MODULE_LICENSE("GPL v2");