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 }; 71