1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Synopsys DesignWare Multimedia Card Interface driver 4 * 5 * Copyright (C) 2009 NXP Semiconductors 6 * Copyright (C) 2009, 2010 Imagination Technologies Ltd. 7 */ 8 9 #include <linux/err.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/io.h> 13 #include <linux/irq.h> 14 #include <linux/platform_device.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/slab.h> 17 #include <linux/mmc/host.h> 18 #include <linux/mmc/mmc.h> 19 #include <linux/of.h> 20 #include <linux/mfd/altera-sysmgr.h> 21 #include <linux/regmap.h> 22 23 #include "dw_mmc.h" 24 #include "dw_mmc-pltfm.h" 25 26 #define SOCFPGA_DW_MMC_CLK_PHASE_STEP 45 27 #define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel, reg_shift) \ 28 ((((smplsel) & 0x7) << reg_shift) | (((drvsel) & 0x7) << 0)) 29 30 int dw_mci_pltfm_register(struct platform_device *pdev, 31 const struct dw_mci_drv_data *drv_data) 32 { 33 struct dw_mci *host; 34 struct resource *regs; 35 36 host = devm_kzalloc(&pdev->dev, sizeof(struct dw_mci), GFP_KERNEL); 37 if (!host) 38 return -ENOMEM; 39 40 host->irq = platform_get_irq(pdev, 0); 41 if (host->irq < 0) 42 return host->irq; 43 44 host->drv_data = drv_data; 45 host->dev = &pdev->dev; 46 host->irq_flags = 0; 47 host->pdata = pdev->dev.platform_data; 48 49 host->regs = devm_platform_get_and_ioremap_resource(pdev, 0, ®s); 50 if (IS_ERR(host->regs)) 51 return PTR_ERR(host->regs); 52 53 /* Get registers' physical base address */ 54 host->phy_regs = regs->start; 55 56 platform_set_drvdata(pdev, host); 57 return dw_mci_probe(host); 58 } 59 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 60 61 const struct dev_pm_ops dw_mci_pltfm_pmops = { 62 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 63 pm_runtime_force_resume) 64 SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend, 65 dw_mci_runtime_resume, 66 NULL) 67 }; 68 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 69 70 static int dw_mci_socfpga_priv_init(struct dw_mci *host) 71 { 72 struct device_node *np = host->dev->of_node; 73 struct regmap *sys_mgr_base_addr; 74 u32 clk_phase[2] = {0}, reg_offset, reg_shift; 75 int i, rc, hs_timing; 76 77 rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0); 78 if (rc < 0) 79 return 0; 80 81 sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon"); 82 if (IS_ERR(sys_mgr_base_addr)) { 83 dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n"); 84 return 0; 85 } 86 87 of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset); 88 of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift); 89 90 for (i = 0; i < ARRAY_SIZE(clk_phase); i++) 91 clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP; 92 93 hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift); 94 regmap_write(sys_mgr_base_addr, reg_offset, hs_timing); 95 96 return 0; 97 } 98 99 static const struct dw_mci_drv_data socfpga_drv_data = { 100 .init = dw_mci_socfpga_priv_init, 101 }; 102 103 static const struct of_device_id dw_mci_pltfm_match[] = { 104 { .compatible = "snps,dw-mshc", }, 105 { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, }, 106 { .compatible = "img,pistachio-dw-mshc", }, 107 {}, 108 }; 109 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 110 111 static int dw_mci_pltfm_probe(struct platform_device *pdev) 112 { 113 const struct dw_mci_drv_data *drv_data = NULL; 114 const struct of_device_id *match; 115 116 if (pdev->dev.of_node) { 117 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 118 drv_data = match->data; 119 } 120 121 return dw_mci_pltfm_register(pdev, drv_data); 122 } 123 124 void dw_mci_pltfm_remove(struct platform_device *pdev) 125 { 126 struct dw_mci *host = platform_get_drvdata(pdev); 127 128 dw_mci_remove(host); 129 } 130 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 131 132 static struct platform_driver dw_mci_pltfm_driver = { 133 .probe = dw_mci_pltfm_probe, 134 .remove_new = dw_mci_pltfm_remove, 135 .driver = { 136 .name = "dw_mmc", 137 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 138 .of_match_table = dw_mci_pltfm_match, 139 .pm = &dw_mci_pltfm_pmops, 140 }, 141 }; 142 143 module_platform_driver(dw_mci_pltfm_driver); 144 145 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 146 MODULE_AUTHOR("NXP Semiconductor VietNam"); 147 MODULE_AUTHOR("Imagination Technologies Ltd"); 148 MODULE_LICENSE("GPL v2"); 149