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
|
/*
* Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/amba/bus.h>
#include <linux/clk.h>
#include <linux/coresight.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include "coresight-priv.h"
#define REPLICATOR_IDFILTER0 0x000
#define REPLICATOR_IDFILTER1 0x004
/**
* struct replicator_state - specifics associated to a replicator component
* @base: memory mapped base address for this component.
* @dev: the device entity associated with this component
* @atclk: optional clock for the core parts of the replicator.
* @csdev: component vitals needed by the framework
*/
struct replicator_state {
void __iomem *base;
struct device *dev;
struct clk *atclk;
struct coresight_device *csdev;
};
static int replicator_enable(struct coresight_device *csdev, int inport,
int outport)
{
struct replicator_state *drvdata = dev_get_drvdata(csdev->dev.parent);
CS_UNLOCK(drvdata->base);
/*
* Ensure that the other port is disabled
* 0x00 - passing through the replicator unimpeded
* 0xff - disable (or impede) the flow of ATB data
*/
if (outport == 0) {
writel_relaxed(0x00, drvdata->base + REPLICATOR_IDFILTER0);
writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
} else {
writel_relaxed(0x00, drvdata->base + REPLICATOR_IDFILTER1);
writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
}
CS_LOCK(drvdata->base);
dev_info(drvdata->dev, "REPLICATOR enabled\n");
return 0;
}
static void replicator_disable(struct coresight_device *csdev, int inport,
int outport)
{
struct replicator_state *drvdata = dev_get_drvdata(csdev->dev.parent);
CS_UNLOCK(drvdata->base);
/* disable the flow of ATB data through port */
if (outport == 0)
writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER0);
else
writel_relaxed(0xff, drvdata->base + REPLICATOR_IDFILTER1);
CS_LOCK(drvdata->base);
dev_info(drvdata->dev, "REPLICATOR disabled\n");
}
static const struct coresight_ops_link replicator_link_ops = {
.enable = replicator_enable,
.disable = replicator_disable,
};
static const struct coresight_ops replicator_cs_ops = {
.link_ops = &replicator_link_ops,
};
static int replicator_probe(struct amba_device *adev, const struct amba_id *id)
{
int ret;
struct device *dev = &adev->dev;
struct resource *res = &adev->res;
struct coresight_platform_data *pdata = NULL;
struct replicator_state *drvdata;
struct coresight_desc desc = { 0 };
struct device_node *np = adev->dev.of_node;
void __iomem *base;
if (np) {
pdata = of_get_coresight_platform_data(dev, np);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
adev->dev.platform_data = pdata;
}
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
drvdata->dev = &adev->dev;
drvdata->atclk = devm_clk_get(&adev->dev, "atclk"); /* optional */
if (!IS_ERR(drvdata->atclk)) {
ret = clk_prepare_enable(drvdata->atclk);
if (ret)
return ret;
}
/* Validity for the resource is already checked by the AMBA core */
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
drvdata->base = base;
dev_set_drvdata(dev, drvdata);
pm_runtime_put(&adev->dev);
desc.type = CORESIGHT_DEV_TYPE_LINK;
desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
desc.ops = &replicator_cs_ops;
desc.pdata = adev->dev.platform_data;
desc.dev = &adev->dev;
drvdata->csdev = coresight_register(&desc);
if (IS_ERR(drvdata->csdev))
return PTR_ERR(drvdata->csdev);
dev_info(dev, "%s initialized\n", (char *)id->data);
return 0;
}
#ifdef CONFIG_PM
static int replicator_runtime_suspend(struct device *dev)
{
struct replicator_state *drvdata = dev_get_drvdata(dev);
if (drvdata && !IS_ERR(drvdata->atclk))
clk_disable_unprepare(drvdata->atclk);
return 0;
}
static int replicator_runtime_resume(struct device *dev)
{
struct replicator_state *drvdata = dev_get_drvdata(dev);
if (drvdata && !IS_ERR(drvdata->atclk))
clk_prepare_enable(drvdata->atclk);
return 0;
}
#endif
static const struct dev_pm_ops replicator_dev_pm_ops = {
SET_RUNTIME_PM_OPS(replicator_runtime_suspend,
replicator_runtime_resume,
NULL)
};
static struct amba_id replicator_ids[] = {
{
.id = 0x0003b909,
.mask = 0x0003ffff,
.data = "REPLICATOR 1.0",
},
{ 0, 0 },
};
static struct amba_driver replicator_driver = {
.drv = {
.name = "coresight-replicator-qcom",
.pm = &replicator_dev_pm_ops,
.suppress_bind_attrs = true,
},
.probe = replicator_probe,
.id_table = replicator_ids,
};
builtin_amba_driver(replicator_driver);
|
