// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018 Mellanox Technologies. */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/mmc/host.h> #include <linux/mmc/mmc.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include "dw_mmc.h" #include "dw_mmc-pltfm.h" #define UHS_REG_EXT_SAMPLE_MASK GENMASK(22, 16) #define UHS_REG_EXT_DRIVE_MASK GENMASK(29, 23) #define BLUEFIELD_UHS_REG_EXT_SAMPLE 2 #define BLUEFIELD_UHS_REG_EXT_DRIVE 4 static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) { u32 reg; /* Update the Drive and Sample fields in register UHS_REG_EXT. */ reg = mci_readl(host, UHS_REG_EXT); reg &= ~UHS_REG_EXT_SAMPLE_MASK; reg |= FIELD_PREP(UHS_REG_EXT_SAMPLE_MASK, BLUEFIELD_UHS_REG_EXT_SAMPLE); reg &= ~UHS_REG_EXT_DRIVE_MASK; reg |= FIELD_PREP(UHS_REG_EXT_DRIVE_MASK, BLUEFIELD_UHS_REG_EXT_DRIVE); mci_writel(host, UHS_REG_EXT, reg); } static const struct dw_mci_drv_data bluefield_drv_data = { .set_ios = dw_mci_bluefield_set_ios }; static const struct of_device_id dw_mci_bluefield_match[] = { { .compatible = "mellanox,bluefield-dw-mshc", .data = &bluefield_drv_data }, {}, }; MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match); static int dw_mci_bluefield_probe(struct platform_device *pdev) { return dw_mci_pltfm_register(pdev, &bluefield_drv_data); } static struct platform_driver dw_mci_bluefield_pltfm_driver = { .probe = dw_mci_bluefield_probe, .remove_new = dw_mci_pltfm_remove, .driver = { .name = "dwmmc_bluefield", .probe_type = PROBE_PREFER_ASYNCHRONOUS, .of_match_table = dw_mci_bluefield_match, .pm = &dw_mci_pltfm_pmops, }, }; module_platform_driver(dw_mci_bluefield_pltfm_driver); MODULE_DESCRIPTION("BlueField DW Multimedia Card driver"); MODULE_AUTHOR("Mellanox Technologies"); MODULE_LICENSE("GPL v2");