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 25 #include "dw_mmc.h" 26 #include "dw_mmc-pltfm.h" 27 28 static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr) 29 { 30 *cmdr |= SDMMC_CMD_USE_HOLD_REG; 31 } 32 33 static const struct dw_mci_drv_data rockchip_drv_data = { 34 .prepare_command = dw_mci_rockchip_prepare_command, 35 }; 36 37 int dw_mci_pltfm_register(struct platform_device *pdev, 38 const struct dw_mci_drv_data *drv_data) 39 { 40 struct dw_mci *host; 41 struct resource *regs; 42 int ret; 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 if (drv_data && drv_data->init) { 63 ret = drv_data->init(host); 64 if (ret) 65 return ret; 66 } 67 68 platform_set_drvdata(pdev, host); 69 return dw_mci_probe(host); 70 } 71 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 72 73 #ifdef CONFIG_PM_SLEEP 74 /* 75 * TODO: we should probably disable the clock to the card in the suspend path. 76 */ 77 static int dw_mci_pltfm_suspend(struct device *dev) 78 { 79 struct dw_mci *host = dev_get_drvdata(dev); 80 81 return dw_mci_suspend(host); 82 } 83 84 static int dw_mci_pltfm_resume(struct device *dev) 85 { 86 struct dw_mci *host = dev_get_drvdata(dev); 87 88 return dw_mci_resume(host); 89 } 90 #else 91 #define dw_mci_pltfm_suspend NULL 92 #define dw_mci_pltfm_resume NULL 93 #endif /* CONFIG_PM_SLEEP */ 94 95 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 96 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 97 98 static const struct of_device_id dw_mci_pltfm_match[] = { 99 { .compatible = "snps,dw-mshc", }, 100 { .compatible = "rockchip,rk2928-dw-mshc", 101 .data = &rockchip_drv_data }, 102 {}, 103 }; 104 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 105 106 static int dw_mci_pltfm_probe(struct platform_device *pdev) 107 { 108 const struct dw_mci_drv_data *drv_data = NULL; 109 const struct of_device_id *match; 110 111 if (pdev->dev.of_node) { 112 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 113 drv_data = match->data; 114 } 115 116 return dw_mci_pltfm_register(pdev, drv_data); 117 } 118 119 int dw_mci_pltfm_remove(struct platform_device *pdev) 120 { 121 struct dw_mci *host = platform_get_drvdata(pdev); 122 123 dw_mci_remove(host); 124 return 0; 125 } 126 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 127 128 static struct platform_driver dw_mci_pltfm_driver = { 129 .probe = dw_mci_pltfm_probe, 130 .remove = dw_mci_pltfm_remove, 131 .driver = { 132 .name = "dw_mmc", 133 .of_match_table = of_match_ptr(dw_mci_pltfm_match), 134 .pm = &dw_mci_pltfm_pmops, 135 }, 136 }; 137 138 module_platform_driver(dw_mci_pltfm_driver); 139 140 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 141 MODULE_AUTHOR("NXP Semiconductor VietNam"); 142 MODULE_AUTHOR("Imagination Technologies Ltd"); 143 MODULE_LICENSE("GPL v2"); 144