1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2018 Mellanox Technologies.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/bitfield.h>
7*4882a593Smuzhiyun #include <linux/bitops.h>
8*4882a593Smuzhiyun #include <linux/mmc/host.h>
9*4882a593Smuzhiyun #include <linux/mmc/mmc.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/of.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/pm_runtime.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "dw_mmc.h"
16*4882a593Smuzhiyun #include "dw_mmc-pltfm.h"
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #define UHS_REG_EXT_SAMPLE_MASK GENMASK(22, 16)
19*4882a593Smuzhiyun #define UHS_REG_EXT_DRIVE_MASK GENMASK(29, 23)
20*4882a593Smuzhiyun #define BLUEFIELD_UHS_REG_EXT_SAMPLE 2
21*4882a593Smuzhiyun #define BLUEFIELD_UHS_REG_EXT_DRIVE 4
22*4882a593Smuzhiyun
dw_mci_bluefield_set_ios(struct dw_mci * host,struct mmc_ios * ios)23*4882a593Smuzhiyun static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun u32 reg;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun /* Update the Drive and Sample fields in register UHS_REG_EXT. */
28*4882a593Smuzhiyun reg = mci_readl(host, UHS_REG_EXT);
29*4882a593Smuzhiyun reg &= ~UHS_REG_EXT_SAMPLE_MASK;
30*4882a593Smuzhiyun reg |= FIELD_PREP(UHS_REG_EXT_SAMPLE_MASK,
31*4882a593Smuzhiyun BLUEFIELD_UHS_REG_EXT_SAMPLE);
32*4882a593Smuzhiyun reg &= ~UHS_REG_EXT_DRIVE_MASK;
33*4882a593Smuzhiyun reg |= FIELD_PREP(UHS_REG_EXT_DRIVE_MASK, BLUEFIELD_UHS_REG_EXT_DRIVE);
34*4882a593Smuzhiyun mci_writel(host, UHS_REG_EXT, reg);
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun static const struct dw_mci_drv_data bluefield_drv_data = {
38*4882a593Smuzhiyun .set_ios = dw_mci_bluefield_set_ios
39*4882a593Smuzhiyun };
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun static const struct of_device_id dw_mci_bluefield_match[] = {
42*4882a593Smuzhiyun { .compatible = "mellanox,bluefield-dw-mshc",
43*4882a593Smuzhiyun .data = &bluefield_drv_data },
44*4882a593Smuzhiyun {},
45*4882a593Smuzhiyun };
46*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
47*4882a593Smuzhiyun
dw_mci_bluefield_probe(struct platform_device * pdev)48*4882a593Smuzhiyun static int dw_mci_bluefield_probe(struct platform_device *pdev)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun return dw_mci_pltfm_register(pdev, &bluefield_drv_data);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun static struct platform_driver dw_mci_bluefield_pltfm_driver = {
54*4882a593Smuzhiyun .probe = dw_mci_bluefield_probe,
55*4882a593Smuzhiyun .remove = dw_mci_pltfm_remove,
56*4882a593Smuzhiyun .driver = {
57*4882a593Smuzhiyun .name = "dwmmc_bluefield",
58*4882a593Smuzhiyun .probe_type = PROBE_PREFER_ASYNCHRONOUS,
59*4882a593Smuzhiyun .of_match_table = dw_mci_bluefield_match,
60*4882a593Smuzhiyun .pm = &dw_mci_pltfm_pmops,
61*4882a593Smuzhiyun },
62*4882a593Smuzhiyun };
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun module_platform_driver(dw_mci_bluefield_pltfm_driver);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
67*4882a593Smuzhiyun MODULE_AUTHOR("Mellanox Technologies");
68*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
69