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 static void dw_mci_pltfm_prepare_command(struct dw_mci *host, u32 *cmdr) 30 { 31 *cmdr |= SDMMC_CMD_USE_HOLD_REG; 32 } 33 34 static const struct dw_mci_drv_data socfpga_drv_data = { 35 .prepare_command = dw_mci_pltfm_prepare_command, 36 }; 37 38 int dw_mci_pltfm_register(struct platform_device *pdev, 39 const struct dw_mci_drv_data *drv_data) 40 { 41 struct dw_mci *host; 42 struct resource *regs; 43 44 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); 45 if (!host) 46 return -ENOMEM; 47 48 host->irq = platform_get_irq(pdev, 0); 49 if (host->irq < 0) 50 return host->irq; 51 52 host->drv_data = drv_data; 53 host->dev = &pdev->dev; 54 host->irq_flags = 0; 55 host->pdata = pdev->dev.platform_data; 56 57 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 58 host->regs = devm_ioremap_resource(&pdev->dev, regs); 59 if (IS_ERR(host->regs)) 60 return PTR_ERR(host->regs); 61 62 platform_set_drvdata(pdev, host); 63 return dw_mci_probe(host); 64 } 65 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 66 67 #ifdef CONFIG_PM_SLEEP 68 /* 69 * TODO: we should probably disable the clock to the card in the suspend path. 70 */ 71 static int dw_mci_pltfm_suspend(struct device *dev) 72 { 73 struct dw_mci *host = dev_get_drvdata(dev); 74 75 return dw_mci_suspend(host); 76 } 77 78 static int dw_mci_pltfm_resume(struct device *dev) 79 { 80 struct dw_mci *host = dev_get_drvdata(dev); 81 82 return dw_mci_resume(host); 83 } 84 #endif /* CONFIG_PM_SLEEP */ 85 86 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 87 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 88 89 static const struct of_device_id dw_mci_pltfm_match[] = { 90 { .compatible = "snps,dw-mshc", }, 91 { .compatible = "altr,socfpga-dw-mshc", 92 .data = &socfpga_drv_data }, 93 {}, 94 }; 95 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 96 97 static int dw_mci_pltfm_probe(struct platform_device *pdev) 98 { 99 const struct dw_mci_drv_data *drv_data = NULL; 100 const struct of_device_id *match; 101 102 if (pdev->dev.of_node) { 103 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 104 drv_data = match->data; 105 } 106 107 return dw_mci_pltfm_register(pdev, drv_data); 108 } 109 110 int dw_mci_pltfm_remove(struct platform_device *pdev) 111 { 112 struct dw_mci *host = platform_get_drvdata(pdev); 113 114 dw_mci_remove(host); 115 return 0; 116 } 117 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 118 119 static struct platform_driver dw_mci_pltfm_driver = { 120 .probe = dw_mci_pltfm_probe, 121 .remove = dw_mci_pltfm_remove, 122 .driver = { 123 .name = "dw_mmc", 124 .of_match_table = dw_mci_pltfm_match, 125 .pm = &dw_mci_pltfm_pmops, 126 }, 127 }; 128 129 module_platform_driver(dw_mci_pltfm_driver); 130 131 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 132 MODULE_AUTHOR("NXP Semiconductor VietNam"); 133 MODULE_AUTHOR("Imagination Technologies Ltd"); 134 MODULE_LICENSE("GPL v2"); 135