186958dccSLiming Sun // SPDX-License-Identifier: GPL-2.0
286958dccSLiming Sun /*
386958dccSLiming Sun * Copyright (C) 2018 Mellanox Technologies.
486958dccSLiming Sun */
586958dccSLiming Sun
686958dccSLiming Sun #include <linux/bitfield.h>
786958dccSLiming Sun #include <linux/bitops.h>
886958dccSLiming Sun #include <linux/mmc/host.h>
986958dccSLiming Sun #include <linux/mmc/mmc.h>
1086958dccSLiming Sun #include <linux/module.h>
1186958dccSLiming Sun #include <linux/of.h>
1286958dccSLiming Sun #include <linux/platform_device.h>
1386958dccSLiming Sun #include <linux/pm_runtime.h>
1486958dccSLiming Sun
1586958dccSLiming Sun #include "dw_mmc.h"
1686958dccSLiming Sun #include "dw_mmc-pltfm.h"
1786958dccSLiming Sun
1886958dccSLiming Sun #define UHS_REG_EXT_SAMPLE_MASK GENMASK(22, 16)
1986958dccSLiming Sun #define UHS_REG_EXT_DRIVE_MASK GENMASK(29, 23)
2086958dccSLiming Sun #define BLUEFIELD_UHS_REG_EXT_SAMPLE 2
2186958dccSLiming Sun #define BLUEFIELD_UHS_REG_EXT_DRIVE 4
2286958dccSLiming Sun
dw_mci_bluefield_set_ios(struct dw_mci * host,struct mmc_ios * ios)2386958dccSLiming Sun static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
2486958dccSLiming Sun {
2586958dccSLiming Sun u32 reg;
2686958dccSLiming Sun
2786958dccSLiming Sun /* Update the Drive and Sample fields in register UHS_REG_EXT. */
2886958dccSLiming Sun reg = mci_readl(host, UHS_REG_EXT);
2986958dccSLiming Sun reg &= ~UHS_REG_EXT_SAMPLE_MASK;
3086958dccSLiming Sun reg |= FIELD_PREP(UHS_REG_EXT_SAMPLE_MASK,
3186958dccSLiming Sun BLUEFIELD_UHS_REG_EXT_SAMPLE);
3286958dccSLiming Sun reg &= ~UHS_REG_EXT_DRIVE_MASK;
3386958dccSLiming Sun reg |= FIELD_PREP(UHS_REG_EXT_DRIVE_MASK, BLUEFIELD_UHS_REG_EXT_DRIVE);
3486958dccSLiming Sun mci_writel(host, UHS_REG_EXT, reg);
3586958dccSLiming Sun }
3686958dccSLiming Sun
3786958dccSLiming Sun static const struct dw_mci_drv_data bluefield_drv_data = {
3886958dccSLiming Sun .set_ios = dw_mci_bluefield_set_ios
3986958dccSLiming Sun };
4086958dccSLiming Sun
4186958dccSLiming Sun static const struct of_device_id dw_mci_bluefield_match[] = {
4286958dccSLiming Sun { .compatible = "mellanox,bluefield-dw-mshc",
4386958dccSLiming Sun .data = &bluefield_drv_data },
4486958dccSLiming Sun {},
4586958dccSLiming Sun };
4686958dccSLiming Sun MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
4786958dccSLiming Sun
dw_mci_bluefield_probe(struct platform_device * pdev)4886958dccSLiming Sun static int dw_mci_bluefield_probe(struct platform_device *pdev)
4986958dccSLiming Sun {
503df407b2SLiming Sun return dw_mci_pltfm_register(pdev, &bluefield_drv_data);
5186958dccSLiming Sun }
5286958dccSLiming Sun
5386958dccSLiming Sun static struct platform_driver dw_mci_bluefield_pltfm_driver = {
5486958dccSLiming Sun .probe = dw_mci_bluefield_probe,
55*982fe2e0SUwe Kleine-König .remove_new = dw_mci_pltfm_remove,
5686958dccSLiming Sun .driver = {
5786958dccSLiming Sun .name = "dwmmc_bluefield",
58a1a48919SDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS,
5986958dccSLiming Sun .of_match_table = dw_mci_bluefield_match,
6086958dccSLiming Sun .pm = &dw_mci_pltfm_pmops,
6186958dccSLiming Sun },
6286958dccSLiming Sun };
6386958dccSLiming Sun
6486958dccSLiming Sun module_platform_driver(dw_mci_bluefield_pltfm_driver);
6586958dccSLiming Sun
6686958dccSLiming Sun MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
6786958dccSLiming Sun MODULE_AUTHOR("Mellanox Technologies");
6886958dccSLiming Sun MODULE_LICENSE("GPL v2");
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