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
 
 
 
23static 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
 
 
 
 
 
 
 
 
 
 
 
37static const struct dw_mci_drv_data bluefield_drv_data = {
38	.set_ios		= dw_mci_bluefield_set_ios
 
39};
40
41static const struct of_device_id dw_mci_bluefield_match[] = {
42	{ .compatible = "mellanox,bluefield-dw-mshc",
43	  .data = &bluefield_drv_data },
44	{},
45};
46MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
47
48static int dw_mci_bluefield_probe(struct platform_device *pdev)
49{
50	return dw_mci_pltfm_register(pdev, &bluefield_drv_data);
51}
52
53static struct platform_driver dw_mci_bluefield_pltfm_driver = {
54	.probe		= dw_mci_bluefield_probe,
55	.remove		= 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
64module_platform_driver(dw_mci_bluefield_pltfm_driver);
65
66MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
67MODULE_AUTHOR("Mellanox Technologies");
68MODULE_LICENSE("GPL v2");

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2018 Mellanox Technologies.
 4 */
 5
 6#include <linux/arm-smccc.h>
 7#include <linux/bitfield.h>
 8#include <linux/bitops.h>
 9#include <linux/mmc/host.h>
10#include <linux/mmc/mmc.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/platform_device.h>
14#include <linux/pm_runtime.h>
15
16#include "dw_mmc.h"
17#include "dw_mmc-pltfm.h"
18
19#define UHS_REG_EXT_SAMPLE_MASK		GENMASK(22, 16)
20#define UHS_REG_EXT_DRIVE_MASK		GENMASK(29, 23)
21#define BLUEFIELD_UHS_REG_EXT_SAMPLE	2
22#define BLUEFIELD_UHS_REG_EXT_DRIVE	4
23
24/* SMC call for RST_N */
25#define BLUEFIELD_SMC_SET_EMMC_RST_N	0x82000007
26
27static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios)
28{
29	u32 reg;
30
31	/* Update the Drive and Sample fields in register UHS_REG_EXT. */
32	reg = mci_readl(host, UHS_REG_EXT);
33	reg &= ~UHS_REG_EXT_SAMPLE_MASK;
34	reg |= FIELD_PREP(UHS_REG_EXT_SAMPLE_MASK,
35			  BLUEFIELD_UHS_REG_EXT_SAMPLE);
36	reg &= ~UHS_REG_EXT_DRIVE_MASK;
37	reg |= FIELD_PREP(UHS_REG_EXT_DRIVE_MASK, BLUEFIELD_UHS_REG_EXT_DRIVE);
38	mci_writel(host, UHS_REG_EXT, reg);
39}
40
41static void dw_mci_bluefield_hw_reset(struct dw_mci *host)
42{
43		struct arm_smccc_res res = { 0 };
44
45		arm_smccc_smc(BLUEFIELD_SMC_SET_EMMC_RST_N, 0, 0, 0, 0, 0, 0, 0,
46			      &res);
47
48		if (res.a0)
49			pr_err("RST_N failed.\n");
50}
51
52static const struct dw_mci_drv_data bluefield_drv_data = {
53	.set_ios		= dw_mci_bluefield_set_ios,
54	.hw_reset		= dw_mci_bluefield_hw_reset
55};
56
57static const struct of_device_id dw_mci_bluefield_match[] = {
58	{ .compatible = "mellanox,bluefield-dw-mshc",
59	  .data = &bluefield_drv_data },
60	{},
61};
62MODULE_DEVICE_TABLE(of, dw_mci_bluefield_match);
63
64static int dw_mci_bluefield_probe(struct platform_device *pdev)
65{
66	return dw_mci_pltfm_register(pdev, &bluefield_drv_data);
67}
68
69static struct platform_driver dw_mci_bluefield_pltfm_driver = {
70	.probe		= dw_mci_bluefield_probe,
71	.remove		= dw_mci_pltfm_remove,
72	.driver		= {
73		.name		= "dwmmc_bluefield",
74		.probe_type	= PROBE_PREFER_ASYNCHRONOUS,
75		.of_match_table	= dw_mci_bluefield_match,
76		.pm		= &dw_mci_pltfm_pmops,
77	},
78};
79
80module_platform_driver(dw_mci_bluefield_pltfm_driver);
81
82MODULE_DESCRIPTION("BlueField DW Multimedia Card driver");
83MODULE_AUTHOR("Mellanox Technologies");
84MODULE_LICENSE("GPL v2");