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 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 50 host->regs = devm_ioremap_resource(&pdev->dev, regs); 51 if (IS_ERR(host->regs)) 52 return PTR_ERR(host->regs); 53 54 /* Get registers' physical base address */ 55 host->phy_regs = regs->start; 56 57 platform_set_drvdata(pdev, host); 58 return dw_mci_probe(host); 59 } 60 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 61 62 const struct dev_pm_ops dw_mci_pltfm_pmops = { 63 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 64 pm_runtime_force_resume) 65 SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend, 66 dw_mci_runtime_resume, 67 NULL) 68 }; 69 EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops); 70 71 static int dw_mci_socfpga_priv_init(struct dw_mci *host) 72 { 73 struct device_node *np = host->dev->of_node; 74 struct regmap *sys_mgr_base_addr; 75 u32 clk_phase[2] = {0}, reg_offset, reg_shift; 76 int i, rc, hs_timing; 77 78 rc = of_property_read_variable_u32_array(np, "clk-phase-sd-hs", &clk_phase[0], 2, 0); 79 if (rc < 0) 80 return 0; 81 82 sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon"); 83 if (IS_ERR(sys_mgr_base_addr)) { 84 dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n"); 85 return 0; 86 } 87 88 of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset); 89 of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift); 90 91 for (i = 0; i < ARRAY_SIZE(clk_phase); i++) 92 clk_phase[i] /= SOCFPGA_DW_MMC_CLK_PHASE_STEP; 93 94 hs_timing = SYSMGR_SDMMC_CTRL_SET(clk_phase[0], clk_phase[1], reg_shift); 95 regmap_write(sys_mgr_base_addr, reg_offset, hs_timing); 96 97 return 0; 98 } 99 100 static const struct dw_mci_drv_data socfpga_drv_data = { 101 .init = dw_mci_socfpga_priv_init, 102 }; 103 104 static const struct of_device_id dw_mci_pltfm_match[] = { 105 { .compatible = "snps,dw-mshc", }, 106 { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, }, 107 { .compatible = "img,pistachio-dw-mshc", }, 108 {}, 109 }; 110 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 111 112 static int dw_mci_pltfm_probe(struct platform_device *pdev) 113 { 114 const struct dw_mci_drv_data *drv_data = NULL; 115 const struct of_device_id *match; 116 117 if (pdev->dev.of_node) { 118 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 119 drv_data = match->data; 120 } 121 122 return dw_mci_pltfm_register(pdev, drv_data); 123 } 124 125 int dw_mci_pltfm_remove(struct platform_device *pdev) 126 { 127 struct dw_mci *host = platform_get_drvdata(pdev); 128 129 dw_mci_remove(host); 130 return 0; 131 } 132 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 133 134 static struct platform_driver dw_mci_pltfm_driver = { 135 .probe = dw_mci_pltfm_probe, 136 .remove = dw_mci_pltfm_remove, 137 .driver = { 138 .name = "dw_mmc", 139 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 140 .of_match_table = dw_mci_pltfm_match, 141 .pm = &dw_mci_pltfm_pmops, 142 }, 143 }; 144 145 module_platform_driver(dw_mci_pltfm_driver); 146 147 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 148 MODULE_AUTHOR("NXP Semiconductor VietNam"); 149 MODULE_AUTHOR("Imagination Technologies Ltd"); 150 MODULE_LICENSE("GPL v2"); 151