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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Synopsys DesignWare Multimedia Card Interface driver4 *5 * Copyright (C) 2009 NXP Semiconductors6 * 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 4527#define SYSMGR_SDMMC_CTRL_SET(smplsel, drvsel, reg_shift) \28 ((((smplsel) & 0x7) << reg_shift) | (((drvsel) & 0x7) << 0))29 30int 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}59EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);60 61const 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};68EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);69 70static 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 99static const struct dw_mci_drv_data socfpga_drv_data = {100 .init = dw_mci_socfpga_priv_init,101};102 103static 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};109MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);110 111static 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 124void 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}130EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);131 132static 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 143module_platform_driver(dw_mci_pltfm_driver);144 145MODULE_DESCRIPTION("DW Multimedia Card Interface driver");146MODULE_AUTHOR("NXP Semiconductor VietNam");147MODULE_AUTHOR("Imagination Technologies Ltd");148MODULE_LICENSE("GPL v2");149