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 /* Get registers' physical base address */ 63 host->phy_regs = regs->start; 64 host->regs = devm_ioremap_resource(&pdev->dev, regs); 65 if (IS_ERR(host->regs)) 66 return PTR_ERR(host->regs); 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 #endif /* CONFIG_PM_SLEEP */ 91 92 SIMPLE_DEV_PM_OPS(dw_mci_pltfm_pmops, dw_mci_pltfm_suspend, dw_mci_pltfm_resume); 93 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 94 95 static const struct of_device_id dw_mci_pltfm_match[] = { 96 { .compatible = "snps,dw-mshc", }, 97 { .compatible = "altr,socfpga-dw-mshc", 98 .data = &socfpga_drv_data }, 99 { .compatible = "img,pistachio-dw-mshc", 100 .data = &pistachio_drv_data }, 101 {}, 102 }; 103 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 104 105 static int dw_mci_pltfm_probe(struct platform_device *pdev) 106 { 107 const struct dw_mci_drv_data *drv_data = NULL; 108 const struct of_device_id *match; 109 110 if (pdev->dev.of_node) { 111 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 112 drv_data = match->data; 113 } 114 115 return dw_mci_pltfm_register(pdev, drv_data); 116 } 117 118 int dw_mci_pltfm_remove(struct platform_device *pdev) 119 { 120 struct dw_mci *host = platform_get_drvdata(pdev); 121 122 dw_mci_remove(host); 123 return 0; 124 } 125 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 126 127 static struct platform_driver dw_mci_pltfm_driver = { 128 .probe = dw_mci_pltfm_probe, 129 .remove = dw_mci_pltfm_remove, 130 .driver = { 131 .name = "dw_mmc", 132 .of_match_table = dw_mci_pltfm_match, 133 .pm = &dw_mci_pltfm_pmops, 134 }, 135 }; 136 137 module_platform_driver(dw_mci_pltfm_driver); 138 139 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 140 MODULE_AUTHOR("NXP Semiconductor VietNam"); 141 MODULE_AUTHOR("Imagination Technologies Ltd"); 142 MODULE_LICENSE("GPL v2"); 143