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 SYNOPSYS_DW_MCI_VENDOR_ID 0x700
  25 #define SYNOPSYS_DW_MCI_DEVICE_ID 0x1107
  26 /* Defining the Capabilities */
  27 #define DW_MCI_CAPABILITIES (MMC_CAP_4_BIT_DATA | MMC_CAP_MMC_HIGHSPEED |\
  28                                 MMC_CAP_SD_HIGHSPEED | MMC_CAP_8_BIT_DATA |\
  29                                 MMC_CAP_SDIO_IRQ)
  30
  31 static struct dw_mci_board pci_board_data = {
  32         .num_slots                      = 1,
  33         .caps                           = DW_MCI_CAPABILITIES,
  34         .bus_hz                         = 33 * 1000 * 1000,
  35         .detect_delay_ms                = 200,
  36         .fifo_depth                     = 32,
  37 };
  38
  39 static int dw_mci_pci_probe(struct pci_dev *pdev,
  40                             const struct pci_device_id *entries)
  41 {
  42         struct dw_mci *host;
  43         int ret;
  44
  45         ret = pcim_enable_device(pdev);
  46         if (ret)
  47                 return ret;
  48
  49         host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL);
  50         if (!host)
  51                 return -ENOMEM;
  52
  53         host->irq = pdev->irq;
  54         host->irq_flags = IRQF_SHARED;
  55         host->dev = &pdev->dev;
  56         host->pdata = &pci_board_data;
  57
  58         ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
  59         if (ret)
  60                 return ret;
  61
  62         host->regs = pcim_iomap_table(pdev)[PCI_BAR_NO];
  63
  64         pci_set_master(pdev);
  65
  66         ret = dw_mci_probe(host);
  67         if (ret)
  68                 return ret;
  69
  70         pci_set_drvdata(pdev, host);
  71
  72         return 0;
  73 }
  74
  75 static void dw_mci_pci_remove(struct pci_dev *pdev)
  76 {
  77         struct dw_mci *host = pci_get_drvdata(pdev);
  78
  79         dw_mci_remove(host);
  80 }
  81
  82 #ifdef CONFIG_PM_SLEEP
  83 static int dw_mci_pci_suspend(struct device *dev)
  84 {
  85         struct pci_dev *pdev = to_pci_dev(dev);
  86         struct dw_mci *host = pci_get_drvdata(pdev);
  87
  88         return dw_mci_suspend(host);
  89 }
  90
  91 static int dw_mci_pci_resume(struct device *dev)
  92 {
  93         struct pci_dev *pdev = to_pci_dev(dev);
  94         struct dw_mci *host = pci_get_drvdata(pdev);
  95
  96         return dw_mci_resume(host);
  97 }
  98 #else
  99 #define dw_mci_pci_suspend      NULL
 100 #define dw_mci_pci_resume       NULL
 101 #endif /* CONFIG_PM_SLEEP */
 102
 103 static SIMPLE_DEV_PM_OPS(dw_mci_pci_pmops, dw_mci_pci_suspend, dw_mci_pci_resume);
 104
 105 static DEFINE_PCI_DEVICE_TABLE(dw_mci_pci_id) = {
 106         { PCI_DEVICE(SYNOPSYS_DW_MCI_VENDOR_ID, SYNOPSYS_DW_MCI_DEVICE_ID) },
 107         {}
 108 };
 109 MODULE_DEVICE_TABLE(pci, dw_mci_pci_id);
 110
 111 static struct pci_driver dw_mci_pci_driver = {
 112         .name           = "dw_mmc_pci",
 113         .id_table       = dw_mci_pci_id,
 114         .probe          = dw_mci_pci_probe,
 115         .remove         = dw_mci_pci_remove,
 116         .driver         =       {
 117                 .pm =   &dw_mci_pci_pmops
 118         },
 119 };
 120
 121 module_pci_driver(dw_mci_pci_driver);
 122
 123 MODULE_DESCRIPTION("DW Multimedia Card PCI Interface driver");
 124 MODULE_AUTHOR("Shashidhar Hiremath <shashidharh@vayavyalabs.com>");
 125 MODULE_LICENSE("GPL v2");