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- // 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 = 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");
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