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 = dw_mci_alloc_host(&pdev->dev); 37 if (IS_ERR(host)) 38 return PTR_ERR(host); 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->irq_flags = 0; 46 47 host->regs = devm_platform_get_and_ioremap_resource(pdev, 0, ®s); 48 if (IS_ERR(host->regs)) 49 return PTR_ERR(host->regs); 50 51 /* Get registers' physical base address */ 52 host->phy_regs = regs->start; 53 54 platform_set_drvdata(pdev, host); 55 return dw_mci_probe(host); 56 } 57 EXPORT_SYMBOL_GPL(dw_mci_pltfm_register); 58 59 static int dw_mci_socfpga_priv_init(struct dw_mci *host) 60 { 61 struct device_node *np = host->dev->of_node; 62 struct mmc_clk_phase phase; 63 struct regmap *sys_mgr_base_addr; 64 u32 reg_offset, reg_shift; 65 int hs_timing; 66 67 phase = host->phase_map.phase[MMC_TIMING_SD_HS]; 68 if (!phase.valid) 69 return 0; 70 71 sys_mgr_base_addr = altr_sysmgr_regmap_lookup_by_phandle(np, "altr,sysmgr-syscon"); 72 if (IS_ERR(sys_mgr_base_addr)) { 73 dev_warn(host->dev, "clk-phase-sd-hs was specified, but failed to find altr,sys-mgr regmap!\n"); 74 return 0; 75 } 76 77 of_property_read_u32_index(np, "altr,sysmgr-syscon", 1, ®_offset); 78 of_property_read_u32_index(np, "altr,sysmgr-syscon", 2, ®_shift); 79 80 phase.in_deg /= SOCFPGA_DW_MMC_CLK_PHASE_STEP; 81 phase.out_deg /= SOCFPGA_DW_MMC_CLK_PHASE_STEP; 82 83 hs_timing = SYSMGR_SDMMC_CTRL_SET(phase.in_deg, phase.out_deg, reg_shift); 84 regmap_write(sys_mgr_base_addr, reg_offset, hs_timing); 85 86 return 0; 87 } 88 89 static const struct dw_mci_drv_data socfpga_drv_data = { 90 .init = dw_mci_socfpga_priv_init, 91 }; 92 93 static const struct of_device_id dw_mci_pltfm_match[] = { 94 { .compatible = "snps,dw-mshc", }, 95 { .compatible = "altr,socfpga-dw-mshc", .data = &socfpga_drv_data, }, 96 { .compatible = "img,pistachio-dw-mshc", }, 97 {}, 98 }; 99 MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match); 100 101 static int dw_mci_pltfm_probe(struct platform_device *pdev) 102 { 103 const struct dw_mci_drv_data *drv_data = NULL; 104 const struct of_device_id *match; 105 106 if (pdev->dev.of_node) { 107 match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node); 108 drv_data = match->data; 109 } 110 111 return dw_mci_pltfm_register(pdev, drv_data); 112 } 113 114 void dw_mci_pltfm_remove(struct platform_device *pdev) 115 { 116 struct dw_mci *host = platform_get_drvdata(pdev); 117 118 dw_mci_remove(host); 119 } 120 EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove); 121 122 static struct platform_driver dw_mci_pltfm_driver = { 123 .probe = dw_mci_pltfm_probe, 124 .remove = dw_mci_pltfm_remove, 125 .driver = { 126 .name = "dw_mmc", 127 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 128 .of_match_table = dw_mci_pltfm_match, 129 .pm = pm_ptr(&dw_mci_pmops), 130 }, 131 }; 132 133 module_platform_driver(dw_mci_pltfm_driver); 134 135 MODULE_DESCRIPTION("DW Multimedia Card Interface driver"); 136 MODULE_AUTHOR("NXP Semiconductor VietNam"); 137 MODULE_AUTHOR("Imagination Technologies Ltd"); 138 MODULE_LICENSE("GPL v2"); 139