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/err.h> 14 #include <linux/interrupt.h> 15 #include <linux/module.h> 16 #include <linux/io.h> 17 #include <linux/irq.h> 18 #include <linux/platform_device.h> 19 #include <linux/slab.h> 20 #include <linux/mmc/host.h> 21 #include <linux/mmc/mmc.h> 22 #include <linux/mmc/dw_mmc.h> 23 #include <linux/of.h> 24 #include <linux/clk.h> 25 26 #include "dw_mmc.h" 27 #include "dw_mmc-pltfm.h" 28 29 int dw_mci_pltfm_register(struct platform_device *pdev, 30 const struct dw_mci_drv_data *drv_data) 31 { 32 struct dw_mci *host; 33 struct resource *regs; 34 35 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); 36 if (!host) 37 return -ENOMEM; 38 39 host->irq = platform_get_irq(pdev, 0); 40 if (host->irq < 0) 41 return host->irq; 42 43 host->drv_data = drv_data; 44 host->dev = &pdev->dev; 45 host->irq_flags = 0; 46 host->pdata = pdev->dev.platform_data; 47 48 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 49 /* Get registers' physical base address */ 50 host->phy_regs = regs->start; 51 host->regs = devm_ioremap_resource(&pdev->dev, regs); 52 if (IS_ERR(host->regs)) 53 return PTR_ERR(host->regs); 54 55 platform_set_drvdata(pdev, host); 56 return dw_mci_probe(host); 57 } 58 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 59 60 #ifdef CONFIG_PM_SLEEP 61 /* 62 * TODO: we should probably disable the clock to the card in the suspend path. 63 */ 64 static int dw_mci_pltfm_suspend(struct device *dev) 65 { 66 struct dw_mci *host = dev_get_drvdata(dev); 67 68 return dw_mci_suspend(host); 69 } 70 71 static int dw_mci_pltfm_resume(struct device *dev) 72 { 73 struct dw_mci *host = dev_get_drvdata(dev); 74 75 return dw_mci_resume(host); 76 } 77 #endif /* CONFIG_PM_SLEEP */ 78 79 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 80 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 81 82 static const struct of_device_id dw_mci_pltfm_match[] = { 83 { .compatible = "snps,dw-mshc", }, 84 { .compatible = "altr,socfpga-dw-mshc", }, 85 { .compatible = "img,pistachio-dw-mshc", }, 86 {}, 87 }; 88 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 89 90 static int dw_mci_pltfm_probe(struct platform_device *pdev) 91 { 92 const struct dw_mci_drv_data *drv_data = NULL; 93 const struct of_device_id *match; 94 95 if (pdev->dev.of_node) { 96 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 97 drv_data = match->data; 98 } 99 100 return dw_mci_pltfm_register(pdev, drv_data); 101 } 102 103 int dw_mci_pltfm_remove(struct platform_device *pdev) 104 { 105 struct dw_mci *host = platform_get_drvdata(pdev); 106 107 dw_mci_remove(host); 108 return 0; 109 } 110 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 111 112 static struct platform_driver dw_mci_pltfm_driver = { 113 .probe = dw_mci_pltfm_probe, 114 .remove = dw_mci_pltfm_remove, 115 .driver = { 116 .name = "dw_mmc", 117 .of_match_table = dw_mci_pltfm_match, 118 .pm = &dw_mci_pltfm_pmops, 119 }, 120 }; 121 122 module_platform_driver(dw_mci_pltfm_driver); 123 124 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 125 MODULE_AUTHOR("NXP Semiconductor VietNam"); 126 MODULE_AUTHOR("Imagination Technologies Ltd"); 127 MODULE_LICENSE("GPL v2"); 128