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