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.h"
  26 #include "sdhci-pltfm.h"
  27
  28 static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
  29 {
  30         u16 ret;
  31
  32         switch (reg) {
  33         case SDHCI_HOST_VERSION:
  34         case SDHCI_SLOT_INT_STATUS:
  35                 /* those registers don't exist */
  36                 return 0;
  37         default:
  38                 ret = readw(host->ioaddr + reg);
  39         }
  40         return ret;
  41 }
  42
  43 static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
  44 {
  45         u32 ret;
  46
  47         switch (reg) {
  48         case SDHCI_CAPABILITIES:
  49                 ret = readl(host->ioaddr + reg);
  50                 /* Mask the support for 3.0V */
  51                 ret &= ~SDHCI_CAN_VDD_300;
  52                 break;
  53         default:
  54                 ret = readl(host->ioaddr + reg);
  55         }
  56         return ret;
  57 }
  58
  59 static struct sdhci_ops sdhci_dove_ops = {
  60         .read_w = sdhci_dove_readw,
  61         .read_l = sdhci_dove_readl,
  62 };
  63
  64 struct sdhci_pltfm_data sdhci_dove_pdata = {
  65         .ops    = &sdhci_dove_ops,
  66         .quirks = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
  67                   SDHCI_QUIRK_NO_BUSY_IRQ |
  68                   SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
  69                   SDHCI_QUIRK_FORCE_DMA,
  70 };