drivers/mmc/host/sdhci-dove.c

   1 /*
   2  * sdhci-dove.c Support for SDHCI on Marvell's Dove SoC
   3  *
   4  * Author: Saeed Bishara <saeed@marvell.com>
   5  *         Mike Rapoport <mike@compulab.co.il>
   6  * Based on sdhci-cns3xxx.c
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/io.h>
  23 #include <linux/mmc/host.h>
  24
  25 #include "sdhci-pltfm.h"
  26
  27 static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
  28 {
  29         u16 ret;
  30
  31         switch (reg) {
  32         case SDHCI_HOST_VERSION:
  33         case SDHCI_SLOT_INT_STATUS:
  34                 /* those registers don't exist */
  35                 return 0;
  36         default:
  37                 ret = readw(host->ioaddr + reg);
  38         }
  39         return ret;
  40 }
  41
  42 static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
  43 {
  44         u32 ret;
  45
  46         switch (reg) {
  47         case SDHCI_CAPABILITIES:
  48                 ret = readl(host->ioaddr + reg);
  49                 /* Mask the support for 3.0V */
  50                 ret &= ~SDHCI_CAN_VDD_300;
  51                 break;
  52         default:
  53                 ret = readl(host->ioaddr + reg);
  54         }
  55         return ret;
  56 }
  57
  58 static struct sdhci_ops sdhci_dove_ops = {
  59         .read_w = sdhci_dove_readw,
  60         .read_l = sdhci_dove_readl,
  61 };
  62
  63 static struct sdhci_pltfm_data sdhci_dove_pdata = {
  64         .ops    = &sdhci_dove_ops,
  65         .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
  66                   SDHCI_QUIRK_NO_BUSY_IRQ |
  67                   SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
  68                   SDHCI_QUIRK_FORCE_DMA,
  69 };
  70
  71 static int __devinit sdhci_dove_probe(struct platform_device *pdev)
  72 {
  73         return sdhci_pltfm_register(pdev, &sdhci_dove_pdata);
  74 }
  75
  76 static int __devexit sdhci_dove_remove(struct platform_device *pdev)
  77 {
  78         return sdhci_pltfm_unregister(pdev);
  79 }
  80
  81 static struct platform_driver sdhci_dove_driver = {
  82         .driver         = {
  83                 .name   = "sdhci-dove",
  84                 .owner  = THIS_MODULE,
  85         },
  86         .probe          = sdhci_dove_probe,
  87         .remove         = __devexit_p(sdhci_dove_remove),
  88 #ifdef CONFIG_PM
  89         .suspend        = sdhci_pltfm_suspend,
  90         .resume         = sdhci_pltfm_resume,
  91 #endif
  92 };
  93
  94 static int __init sdhci_dove_init(void)
  95 {
  96         return platform_driver_register(&sdhci_dove_driver);
  97 }
  98 module_init(sdhci_dove_init);
  99
 100 static void __exit sdhci_dove_exit(void)
 101 {
 102         platform_driver_unregister(&sdhci_dove_driver);
 103 }
 104 module_exit(sdhci_dove_exit);
 105
 106 MODULE_DESCRIPTION("SDHCI driver for Dove");
 107 MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>, "
 108               "Mike Rapoport <mike@compulab.co.il>");
 109 MODULE_LICENSE("GPL v2");