82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2018 Mellanox Technologies.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/bitfield.h>
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#include <linux/bitops.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/mmc.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include "dw_mmc.h"
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#include "dw_mmc-pltfm.h"
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#define UHS_REG_EXT_SAMPLE_MASK GENMASK(22, 16)
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#define UHS_REG_EXT_DRIVE_MASK GENMASK(29, 23)
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#define BLUEFIELD_UHS_REG_EXT_SAMPLE 2
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#define BLUEFIELD_UHS_REG_EXT_DRIVE 4
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static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
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{
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u32 reg;
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/* Update the Drive and Sample fields in register UHS_REG_EXT. */
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reg = mci_readl(host, UHS_REG_EXT);
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reg &= ~UHS_REG_EXT_SAMPLE_MASK;
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reg |= FIELD_PREP(UHS_REG_EXT_SAMPLE_MASK,
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BLUEFIELD_UHS_REG_EXT_SAMPLE);
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reg &= ~UHS_REG_EXT_DRIVE_MASK;
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reg |= FIELD_PREP(UHS_REG_EXT_DRIVE_MASK, BLUEFIELD_UHS_REG_EXT_DRIVE);
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mci_writel(host, UHS_REG_EXT, reg);
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}
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static const struct dw_mci_drv_data bluefield_drv_data = {
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.set_ios = dw_mci_bluefield_set_ios
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};
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static const struct of_device_id dw_mci_bluefield_match[] = {
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{ .compatible = "mellanox,bluefield-dw-mshc",
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.data = &bluefield_drv_data },
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{},
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};
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MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
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static int dw_mci_bluefield_probe(struct platform_device *pdev)
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{
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const struct dw_mci_drv_data *drv_data = NULL;
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const struct of_device_id *match;
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if (pdev->dev.of_node) {
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match = of_match_node(dw_mci_bluefield_match,
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pdev->dev.of_node);
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drv_data = match->data;
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}
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return dw_mci_pltfm_register(pdev, drv_data);
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}
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static struct platform_driver dw_mci_bluefield_pltfm_driver = {
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.probe = dw_mci_bluefield_probe,
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.remove = dw_mci_pltfm_remove,
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.driver = {
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.name = "dwmmc_bluefield",
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.of_match_table = dw_mci_bluefield_match,
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.pm = &dw_mci_pltfm_pmops,
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},
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};
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module_platform_driver(dw_mci_bluefield_pltfm_driver);
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MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
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MODULE_AUTHOR("Mellanox Technologies");
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MODULE_LICENSE("GPL v2");
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