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 43 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); 44 if (!host) 45 return -ENOMEM; 46 47 host->irq = platform_get_irq(pdev, 0); 48 if (host->irq < 0) 49 return host->irq; 50 51 host->drv_data = drv_data; 52 host->dev = &pdev->dev; 53 host->irq_flags = 0; 54 host->pdata = pdev->dev.platform_data; 55 56 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 57 host->regs = devm_ioremap_resource(&pdev->dev, regs); 58 if (IS_ERR(host->regs)) 59 return PTR_ERR(host->regs); 60 61 platform_set_drvdata(pdev, host); 62 return dw_mci_probe(host); 63 } 64 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 65 66 #ifdef CONFIG_PM_SLEEP 67 /* 68 * TODO: we should probably disable the clock to the card in the suspend path. 69 */ 70 static int dw_mci_pltfm_suspend(struct device *dev) 71 { 72 struct dw_mci *host = dev_get_drvdata(dev); 73 74 return dw_mci_suspend(host); 75 } 76 77 static int dw_mci_pltfm_resume(struct device *dev) 78 { 79 struct dw_mci *host = dev_get_drvdata(dev); 80 81 return dw_mci_resume(host); 82 } 83 #else 84 #define dw_mci_pltfm_suspend NULL 85 #define dw_mci_pltfm_resume NULL 86 #endif /* CONFIG_PM_SLEEP */ 87 88 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 89 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 90 91 static const struct of_device_id dw_mci_pltfm_match[] = { 92 { .compatible = "snps,dw-mshc", }, 93 { .compatible = "rockchip,rk2928-dw-mshc", 94 .data = &rockchip_drv_data }, 95 {}, 96 }; 97 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 98 99 static int dw_mci_pltfm_probe(struct platform_device *pdev) 100 { 101 const struct dw_mci_drv_data *drv_data = NULL; 102 const struct of_device_id *match; 103 104 if (pdev->dev.of_node) { 105 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 106 drv_data = match->data; 107 } 108 109 return dw_mci_pltfm_register(pdev, drv_data); 110 } 111 112 int dw_mci_pltfm_remove(struct platform_device *pdev) 113 { 114 struct dw_mci *host = platform_get_drvdata(pdev); 115 116 dw_mci_remove(host); 117 return 0; 118 } 119 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 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