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 static const struct dw_mci_drv_data pistachio_drv_data = { 39 .prepare_command = dw_mci_pltfm_prepare_command, 40 }; 41 42 int dw_mci_pltfm_register(struct platform_device *pdev, 43 const struct dw_mci_drv_data *drv_data) 44 { 45 struct dw_mci *host; 46 struct resource *regs; 47 48 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); 49 if (!host) 50 return -ENOMEM; 51 52 host->irq = platform_get_irq(pdev, 0); 53 if (host->irq < 0) 54 return host->irq; 55 56 host->drv_data = drv_data; 57 host->dev = &pdev->dev; 58 host->irq_flags = 0; 59 host->pdata = pdev->dev.platform_data; 60 61 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 62 host->regs = devm_ioremap_resource(&pdev->dev, regs); 63 if (IS_ERR(host->regs)) 64 return PTR_ERR(host->regs); 65 66 platform_set_drvdata(pdev, host); 67 return dw_mci_probe(host); 68 } 69 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 70 71 #ifdef CONFIG_PM_SLEEP 72 /* 73 * TODO: we should probably disable the clock to the card in the suspend path. 74 */ 75 static int dw_mci_pltfm_suspend(struct device *dev) 76 { 77 struct dw_mci *host = dev_get_drvdata(dev); 78 79 return dw_mci_suspend(host); 80 } 81 82 static int dw_mci_pltfm_resume(struct device *dev) 83 { 84 struct dw_mci *host = dev_get_drvdata(dev); 85 86 return dw_mci_resume(host); 87 } 88 #endif /* CONFIG_PM_SLEEP */ 89 90 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 91 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 92 93 static const struct of_device_id dw_mci_pltfm_match[] = { 94 { .compatible = "snps,dw-mshc", }, 95 { .compatible = "altr,socfpga-dw-mshc", 96 .data = &socfpga_drv_data }, 97 { .compatible = "img,pistachio-dw-mshc", 98 .data = &pistachio_drv_data }, 99 {}, 100 }; 101 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 102 103 static int dw_mci_pltfm_probe(struct platform_device *pdev) 104 { 105 const struct dw_mci_drv_data *drv_data = NULL; 106 const struct of_device_id *match; 107 108 if (pdev->dev.of_node) { 109 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 110 drv_data = match->data; 111 } 112 113 return dw_mci_pltfm_register(pdev, drv_data); 114 } 115 116 int dw_mci_pltfm_remove(struct platform_device *pdev) 117 { 118 struct dw_mci *host = platform_get_drvdata(pdev); 119 120 dw_mci_remove(host); 121 return 0; 122 } 123 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 124 125 static struct platform_driver dw_mci_pltfm_driver = { 126 .probe = dw_mci_pltfm_probe, 127 .remove = dw_mci_pltfm_remove, 128 .driver = { 129 .name = "dw_mmc", 130 .of_match_table = dw_mci_pltfm_match, 131 .pm = &dw_mci_pltfm_pmops, 132 }, 133 }; 134 135 module_platform_driver(dw_mci_pltfm_driver); 136 137 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 138 MODULE_AUTHOR("NXP Semiconductor VietNam"); 139 MODULE_AUTHOR("Imagination Technologies Ltd"); 140 MODULE_LICENSE("GPL v2"); 141