1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
/*
* Copyright (c) 2013 Linaro Ltd.
* Copyright (c) 2013 Hisilicon Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/mfd/syscon.h>
#include <linux/mmc/host.h>
#include <linux/mmc/dw_mmc.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include "dw_mmc.h"
#include "dw_mmc-pltfm.h"
/*
* hi6220 sd only support io voltage 1.8v and 3v
* Also need config AO_SCTRL_SEL18 accordingly
*/
#define AO_SCTRL_SEL18 BIT(10)
#define AO_SCTRL_CTRL3 0x40C
struct k3_priv {
struct regmap *reg;
};
static unsigned long dw_mci_hi6220_caps[] = {
MMC_CAP_CMD23,
MMC_CAP_CMD23,
0
};
static void dw_mci_k3_set_ios(struct dw_mci *host, struct mmc_ios *ios)
{
int ret;
ret = clk_set_rate(host->ciu_clk, ios->clock);
if (ret)
dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
host->bus_hz = clk_get_rate(host->ciu_clk);
}
static const struct dw_mci_drv_data k3_drv_data = {
.set_ios = dw_mci_k3_set_ios,
};
static int dw_mci_hi6220_parse_dt(struct dw_mci *host)
{
struct k3_priv *priv;
priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->reg = syscon_regmap_lookup_by_phandle(host->dev->of_node,
"hisilicon,peripheral-syscon");
if (IS_ERR(priv->reg))
priv->reg = NULL;
host->priv = priv;
return 0;
}
static int dw_mci_hi6220_switch_voltage(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct dw_mci_slot *slot = mmc_priv(mmc);
struct k3_priv *priv;
struct dw_mci *host;
int min_uv, max_uv;
int ret;
host = slot->host;
priv = host->priv;
if (!priv || !priv->reg)
return 0;
if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,
AO_SCTRL_SEL18, 0);
min_uv = 3000000;
max_uv = 3000000;
} else if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
ret = regmap_update_bits(priv->reg, AO_SCTRL_CTRL3,
AO_SCTRL_SEL18, AO_SCTRL_SEL18);
min_uv = 1800000;
max_uv = 1800000;
} else {
dev_dbg(host->dev, "voltage not supported\n");
return -EINVAL;
}
if (ret) {
dev_dbg(host->dev, "switch voltage failed\n");
return ret;
}
if (IS_ERR_OR_NULL(mmc->supply.vqmmc))
return 0;
ret = regulator_set_voltage(mmc->supply.vqmmc, min_uv, max_uv);
if (ret) {
dev_dbg(host->dev, "Regulator set error %d: %d - %d\n",
ret, min_uv, max_uv);
return ret;
}
return 0;
}
static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios)
{
int ret;
unsigned int clock;
clock = (ios->clock <= 25000000) ? 25000000 : ios->clock;
ret = clk_set_rate(host->biu_clk, clock);
if (ret)
dev_warn(host->dev, "failed to set rate %uHz\n", clock);
host->bus_hz = clk_get_rate(host->biu_clk);
}
static const struct dw_mci_drv_data hi6220_data = {
.caps = dw_mci_hi6220_caps,
.switch_voltage = dw_mci_hi6220_switch_voltage,
.set_ios = dw_mci_hi6220_set_ios,
.parse_dt = dw_mci_hi6220_parse_dt,
};
static const struct of_device_id dw_mci_k3_match[] = {
{ .compatible = "hisilicon,hi4511-dw-mshc", .data = &k3_drv_data, },
{ .compatible = "hisilicon,hi6220-dw-mshc", .data = &hi6220_data, },
{},
};
MODULE_DEVICE_TABLE(of, dw_mci_k3_match);
static int dw_mci_k3_probe(struct platform_device *pdev)
{
const struct dw_mci_drv_data *drv_data;
const struct of_device_id *match;
match = of_match_node(dw_mci_k3_match, pdev->dev.of_node);
drv_data = match->data;
return dw_mci_pltfm_register(pdev, drv_data);
}
#ifdef CONFIG_PM_SLEEP
static int dw_mci_k3_suspend(struct device *dev)
{
struct dw_mci *host = dev_get_drvdata(dev);
int ret;
ret = dw_mci_suspend(host);
if (!ret)
clk_disable_unprepare(host->ciu_clk);
return ret;
}
static int dw_mci_k3_resume(struct device *dev)
{
struct dw_mci *host = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(host->ciu_clk);
if (ret) {
dev_err(host->dev, "failed to enable ciu clock\n");
return ret;
}
return dw_mci_resume(host);
}
#endif /* CONFIG_PM_SLEEP */
static SIMPLE_DEV_PM_OPS(dw_mci_k3_pmops, dw_mci_k3_suspend, dw_mci_k3_resume);
static struct platform_driver dw_mci_k3_pltfm_driver = {
.probe = dw_mci_k3_probe,
.remove = dw_mci_pltfm_remove,
.driver = {
.name = "dwmmc_k3",
.of_match_table = dw_mci_k3_match,
.pm = &dw_mci_k3_pmops,
},
};
module_platform_driver(dw_mci_k3_pltfm_driver);
MODULE_DESCRIPTION("K3 Specific DW-MSHC Driver Extension");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:dwmmc_k3");
|
