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 host->regs = devm_ioremap_resource(&pdev->dev, regs); 50 if (IS_ERR(host->regs)) 51 return PTR_ERR(host->regs); 52 53 /* Get registers' physical base address */ 54 host->phy_regs = regs->start; 55 56 platform_set_drvdata(pdev, host); 57 return dw_mci_probe(host); 58 } 59 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 60 61 #ifdef CONFIG_PM_SLEEP 62 /* 63 * TODO: we should probably disable the clock to the card in the suspend path. 64 */ 65 static int dw_mci_pltfm_suspend(struct device *dev) 66 { 67 struct dw_mci *host = dev_get_drvdata(dev); 68 69 return dw_mci_suspend(host); 70 } 71 72 static int dw_mci_pltfm_resume(struct device *dev) 73 { 74 struct dw_mci *host = dev_get_drvdata(dev); 75 76 return dw_mci_resume(host); 77 } 78 #endif /* CONFIG_PM_SLEEP */ 79 80 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 81 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 82 83 static const struct of_device_id dw_mci_pltfm_match[] = { 84 { .compatible = "snps,dw-mshc", }, 85 { .compatible = "altr,socfpga-dw-mshc", }, 86 { .compatible = "img,pistachio-dw-mshc", }, 87 {}, 88 }; 89 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 90 91 static int dw_mci_pltfm_probe(struct platform_device *pdev) 92 { 93 const struct dw_mci_drv_data *drv_data = NULL; 94 const struct of_device_id *match; 95 96 if (pdev->dev.of_node) { 97 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 98 drv_data = match->data; 99 } 100 101 return dw_mci_pltfm_register(pdev, drv_data); 102 } 103 104 int dw_mci_pltfm_remove(struct platform_device *pdev) 105 { 106 struct dw_mci *host = platform_get_drvdata(pdev); 107 108 dw_mci_remove(host); 109 return 0; 110 } 111 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 112 113 static struct platform_driver dw_mci_pltfm_driver = { 114 .probe = dw_mci_pltfm_probe, 115 .remove = dw_mci_pltfm_remove, 116 .driver = { 117 .name = "dw_mmc", 118 .of_match_table = dw_mci_pltfm_match, 119 .pm = &dw_mci_pltfm_pmops, 120 }, 121 }; 122 123 module_platform_driver(dw_mci_pltfm_driver); 124 125 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 126 MODULE_AUTHOR("NXP Semiconductor VietNam"); 127 MODULE_AUTHOR("Imagination Technologies Ltd"); 128 MODULE_LICENSE("GPL v2"); 129