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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/mmc/host/dw_mmc-bluefield.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mmc/host/dw_mmc-bluefield.c')
-rw-r--r-- | drivers/mmc/host/dw_mmc-bluefield.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c new file mode 100644 index 0000000000..4747e5698f --- /dev/null +++ b/drivers/mmc/host/dw_mmc-bluefield.c @@ -0,0 +1,68 @@ +// 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"); |