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"); 110