1 /* 2 * Synopsys DesignWare Multimedia Card Interface driver 3 * 4 * Copyright (C) 2009 NXP Semiconductors 5 * Copyright (C) 2009, 2010 Imagination Technologies Ltd. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 */ 12 13 #include <linux/interrupt.h> 14 #include <linux/module.h> 15 #include <linux/io.h> 16 #include <linux/irq.h> 17 #include <linux/platform_device.h> 18 #include <linux/slab.h> 19 #include <linux/mmc/host.h> 20 #include <linux/mmc/mmc.h> 21 #include <linux/mmc/dw_mmc.h> 22 #include <linux/of.h> 23 24 #include "dw_mmc.h" 25 26 int dw_mci_pltfm_register(struct platform_device *pdev, 27 const struct dw_mci_drv_data *drv_data) 28 { 29 struct dw_mci *host; 30 struct resource *regs; 31 int ret; 32 33 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); 34 if (!host) 35 return -ENOMEM; 36 37 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 38 if (!regs) 39 return -ENXIO; 40 41 host->irq = platform_get_irq(pdev, 0); 42 if (host->irq < 0) 43 return host->irq; 44 45 host->drv_data = drv_data; 46 host->dev = &pdev->dev; 47 host->irq_flags = 0; 48 host->pdata = pdev->dev.platform_data; 49 host->regs = devm_request_and_ioremap(&pdev->dev, regs); 50 if (!host->regs) 51 return -ENOMEM; 52 53 if (drv_data && drv_data->init) { 54 ret = drv_data->init(host); 55 if (ret) 56 return ret; 57 } 58 59 platform_set_drvdata(pdev, host); 60 ret = dw_mci_probe(host); 61 return ret; 62 } 63 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 64 65 static int dw_mci_pltfm_probe(struct platform_device *pdev) 66 { 67 return dw_mci_pltfm_register(pdev, NULL); 68 } 69 70 static int dw_mci_pltfm_remove(struct platform_device *pdev) 71 { 72 struct dw_mci *host = platform_get_drvdata(pdev); 73 74 platform_set_drvdata(pdev, NULL); 75 dw_mci_remove(host); 76 return 0; 77 } 78 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 79 80 #ifdef CONFIG_PM_SLEEP 81 /* 82 * TODO: we should probably disable the clock to the card in the suspend path. 83 */ 84 static int dw_mci_pltfm_suspend(struct device *dev) 85 { 86 int ret; 87 struct dw_mci *host = dev_get_drvdata(dev); 88 89 ret = dw_mci_suspend(host); 90 if (ret) 91 return ret; 92 93 return 0; 94 } 95 96 static int dw_mci_pltfm_resume(struct device *dev) 97 { 98 int ret; 99 struct dw_mci *host = dev_get_drvdata(dev); 100 101 ret = dw_mci_resume(host); 102 if (ret) 103 return ret; 104 105 return 0; 106 } 107 #else 108 #define dw_mci_pltfm_suspend NULL 109 #define dw_mci_pltfm_resume NULL 110 #endif /* CONFIG_PM_SLEEP */ 111 112 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 113 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 114 115 static const struct of_device_id dw_mci_pltfm_match[] = { 116 { .compatible = "snps,dw-mshc", }, 117 {}, 118 }; 119 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 120 121 static struct platform_driver dw_mci_pltfm_driver = { 122 .probe = dw_mci_pltfm_probe, 123 .remove = dw_mci_pltfm_remove, 124 .driver = { 125 .name = "dw_mmc", 126 .of_match_table = of_match_ptr(dw_mci_pltfm_match), 127 .pm = &dw_mci_pltfm_pmops, 128 }, 129 }; 130 131 module_platform_driver(dw_mci_pltfm_driver); 132 133 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 134 MODULE_AUTHOR("NXP Semiconductor VietNam"); 135 MODULE_AUTHOR("Imagination Technologies Ltd"); 136 MODULE_LICENSE("GPL v2"); 137