drivers/mmc/host/dw_mmc-pci.c

   1 /*
   2  * Synopsys DesignWare Multimedia Card PCI Interface driver
   3  *
   4  * Copyright (C) 2012 Vayavya Labs Pvt. Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/interrupt.h>
  13 #include <linux/module.h>
  14 #include <linux/io.h>
  15 #include <linux/irq.h>
  16 #include <linux/pci.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/slab.h>
  19 #include <linux/mmc/host.h>
  20 #include <linux/mmc/mmc.h>
  21 #include <linux/mmc/dw_mmc.h>
  22 #include "dw_mmc.h"
  23
  24 #define PCI_BAR_NO 2
  25 #define SYNOPSYS_DW_MCI_VENDOR_ID 0x700
  26 #define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
  27 /* Defining the Capabilities */
  28 #define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
  29                                 MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
  30                                 MMC_CAP_SDIO_IRQ)
  31
  32 static struct dw_mci_board pci_board_data = {
  33         .num_slots                      = 1,
  34         .caps                           = DW_MCI_CAPABILITIES,
  35         .bus_hz                         = 33 * 1000 * 1000,
  36         .detect_delay_ms                = 200,
  37         .fifo_depth                     = 32,
  38 };
  39
  40 static int dw_mci_pci_probe(struct pci_dev *pdev,
  41                             const struct pci_device_id *entries)
  42 {
  43         struct dw_mci *host;
  44         int ret;
  45
  46         ret = pcim_enable_device(pdev);
  47         if (ret)
  48                 return ret;
  49
  50         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  51         if (!host)
  52                 return -ENOMEM;
  53
  54         host->irq = pdev->irq;
  55         host->irq_flags = IRQF_SHARED;
  56         host->dev = &pdev->dev;
  57         host->pdata = &pci_board_data;
  58
  59         ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
  60         if (ret)
  61                 return ret;
  62
  63         host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];
  64
  65         pci_set_master(pdev);
  66
  67         ret = dw_mci_probe(host);
  68         if (ret)
  69                 return ret;
  70
  71         pci_set_drvdata(pdev, host);
  72
  73         return 0;
  74 }
  75
  76 static void dw_mci_pci_remove(struct pci_dev *pdev)
  77 {
  78         struct dw_mci *host = pci_get_drvdata(pdev);
  79
  80         dw_mci_remove(host);
  81 }
  82
  83 static const struct dev_pm_ops dw_mci_pci_dev_pm_ops = {
  84         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
  85                                 pm_runtime_force_resume)
  86         SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
  87                            dw_mci_runtime_resume,
  88                            NULL)
  89 };
  90
  91 static const struct pci_device_id dw_mci_pci_id[] = {
  92         { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
  93         {}
  94 };
  95 MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
  96
  97 static struct pci_driver dw_mci_pci_driver = {
  98         .name           = "dw_mmc_pci",
  99         .id_table       = dw_mci_pci_id,
 100         .probe          = dw_mci_pci_probe,
 101         .remove         = dw_mci_pci_remove,
 102         .driver         =       {
 103                 .pm =   &dw_mci_pci_dev_pm_ops,
 104         },
 105 };
 106
 107 module_pci_driver(dw_mci_pci_driver);
 108
 109 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
 110 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
 111 MODULE_LICENSE("GPL v2");