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/slab.h>
  18 #include <linux/mmc/host.h>
  19 #include <linux/mmc/mmc.h>
  20 #include <linux/mmc/dw_mmc.h>
  21 #include "dw_mmc.h"
  22
  23 #define PCI_BAR_NO 2
  24 #define COMPLETE_BAR 0
  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 = pci_enable_device(pdev);
  47         if (ret)
  48                 return ret;
  49         if (pci_request_regions(pdev, "dw_mmc_pci")) {
  50                 ret = -ENODEV;
  51                 goto err_disable_dev;
  52         }
  53
  54         host = kzalloc(sizeof(struct dw_mci), GFP_KERNEL);
  55         if (!host) {
  56                 ret = -ENOMEM;
  57                 goto err_release;
  58         }
  59
  60         host->irq = pdev->irq;
  61         host->irq_flags = IRQF_SHARED;
  62         host->dev = &pdev->dev;
  63         host->pdata = &pci_board_data;
  64
  65         host->regs = pci_iomap(pdev, PCI_BAR_NO, COMPLETE_BAR);
  66         if (!host->regs) {
  67                 ret = -EIO;
  68                 goto err_unmap;
  69         }
  70
  71         pci_set_drvdata(pdev, host);
  72         ret = dw_mci_probe(host);
  73         if (ret)
  74                 goto err_probe_failed;
  75         return ret;
  76
  77 err_probe_failed:
  78         pci_iounmap(pdev, host->regs);
  79 err_unmap:
  80         kfree(host);
  81 err_release:
  82         pci_release_regions(pdev);
  83 err_disable_dev:
  84         pci_disable_device(pdev);
  85         return ret;
  86 }
  87
  88 static void dw_mci_pci_remove(struct pci_dev *pdev)
  89 {
  90         struct dw_mci *host = pci_get_drvdata(pdev);
  91
  92         dw_mci_remove(host);
  93         pci_set_drvdata(pdev, NULL);
  94         pci_release_regions(pdev);
  95         pci_iounmap(pdev, host->regs);
  96         kfree(host);
  97         pci_disable_device(pdev);
  98 }
  99
 100 #ifdef CONFIG_PM_SLEEP
 101 static int dw_mci_pci_suspend(struct device *dev)
 102 {
 103         int ret;
 104         struct pci_dev *pdev = to_pci_dev(dev);
 105         struct dw_mci *host = pci_get_drvdata(pdev);
 106
 107         ret = dw_mci_suspend(host);
 108         return ret;
 109 }
 110
 111 static int dw_mci_pci_resume(struct device *dev)
 112 {
 113         int ret;
 114         struct pci_dev *pdev = to_pci_dev(dev);
 115         struct dw_mci *host = pci_get_drvdata(pdev);
 116
 117         ret = dw_mci_resume(host);
 118         return ret;
 119 }
 120 #else
 121 #define dw_mci_pci_suspend      NULL
 122 #define dw_mci_pci_resume       NULL
 123 #endif /* CONFIG_PM_SLEEP */
 124
 125 static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume);
 126
 127 static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = {
 128         { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
 129         {}
 130 };
 131 MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
 132
 133 static struct pci_driver dw_mci_pci_driver = {
 134         .name           = "dw_mmc_pci",
 135         .id_table       = dw_mci_pci_id,
 136         .probe          = dw_mci_pci_probe,
 137         .remove         = dw_mci_pci_remove,
 138         .driver         =       {
 139                 .pm =   &dw_mci_pci_pmops
 140         },
 141 };
 142
 143 module_pci_driver(dw_mci_pci_driver);
 144
 145 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
 146 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
 147 MODULE_LICENSE("GPL v2");