qcom_common.c 6.19 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
/*
 * Qualcomm Peripheral Image Loader helpers
 *
 * Copyright (C) 2016 Linaro Ltd
 * Copyright (C) 2015 Sony Mobile Communications Inc
 * Copyright (c) 2012-2013, 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 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/firmware.h>
#include <linux/kernel.h>
#include <linux/module.h>
21
#include <linux/notifier.h>
22
#include <linux/remoteproc.h>
23
#include <linux/rpmsg/qcom_glink.h>
24
#include <linux/rpmsg/qcom_smd.h>
25
26
27
28

#include "remoteproc_internal.h"
#include "qcom_common.h"

29
#define to_glink_subdev(d) container_of(d, struct qcom_rproc_glink, subdev)
30
#define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
31
32
#define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)

33
static BLOCKING_NOTIFIER_HEAD(ssr_notifiers);
34

35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
/**
 * qcom_mdt_find_rsc_table() - provide dummy resource table for remoteproc
 * @rproc:	remoteproc handle
 * @fw:		firmware header
 * @tablesz:	outgoing size of the table
 *
 * Returns a dummy table.
 */
struct resource_table *qcom_mdt_find_rsc_table(struct rproc *rproc,
					       const struct firmware *fw,
					       int *tablesz)
{
	static struct resource_table table = { .ver = 1, };

	*tablesz = sizeof(table);
	return &table;
}
EXPORT_SYMBOL_GPL(qcom_mdt_find_rsc_table);

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
static int glink_subdev_probe(struct rproc_subdev *subdev)
{
	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);

	glink->edge = qcom_glink_smem_register(glink->dev, glink->node);

	return IS_ERR(glink->edge) ? PTR_ERR(glink->edge) : 0;
}

static void glink_subdev_remove(struct rproc_subdev *subdev)
{
	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);

	qcom_glink_smem_unregister(glink->edge);
	glink->edge = NULL;
}

/**
 * qcom_add_glink_subdev() - try to add a GLINK subdevice to rproc
 * @rproc:	rproc handle to parent the subdevice
 * @glink:	reference to a GLINK subdev context
 */
void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
{
	struct device *dev = &rproc->dev;

	glink->node = of_get_child_by_name(dev->parent->of_node, "glink-edge");
	if (!glink->node)
		return;

	glink->dev = dev;
	rproc_add_subdev(rproc, &glink->subdev, glink_subdev_probe, glink_subdev_remove);
}
EXPORT_SYMBOL_GPL(qcom_add_glink_subdev);

/**
 * qcom_remove_glink_subdev() - remove a GLINK subdevice from rproc
 * @rproc:	rproc handle
 * @glink:	reference to a GLINK subdev context
 */
void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
{
	rproc_remove_subdev(rproc, &glink->subdev);
	of_node_put(glink->node);
}
EXPORT_SYMBOL_GPL(qcom_remove_glink_subdev);

101
102
103
104
105
106
static int smd_subdev_probe(struct rproc_subdev *subdev)
{
	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);

	smd->edge = qcom_smd_register_edge(smd->dev, smd->node);

107
	return PTR_ERR_OR_ZERO(smd->edge);
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
}

static void smd_subdev_remove(struct rproc_subdev *subdev)
{
	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);

	qcom_smd_unregister_edge(smd->edge);
	smd->edge = NULL;
}

/**
 * qcom_add_smd_subdev() - try to add a SMD subdevice to rproc
 * @rproc:	rproc handle to parent the subdevice
 * @smd:	reference to a Qualcomm subdev context
 */
void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
{
	struct device *dev = &rproc->dev;

	smd->node = of_get_child_by_name(dev->parent->of_node, "smd-edge");
	if (!smd->node)
		return;

	smd->dev = dev;
	rproc_add_subdev(rproc, &smd->subdev, smd_subdev_probe, smd_subdev_remove);
}
EXPORT_SYMBOL_GPL(qcom_add_smd_subdev);

/**
 * qcom_remove_smd_subdev() - remove the smd subdevice from rproc
 * @rproc:	rproc handle
 * @smd:	the SMD subdevice to remove
 */
void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
{
	rproc_remove_subdev(rproc, &smd->subdev);
	of_node_put(smd->node);
}
EXPORT_SYMBOL_GPL(qcom_remove_smd_subdev);

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
204
205
206
207
208
209
210
211
212
213
214
/**
 * qcom_register_ssr_notifier() - register SSR notification handler
 * @nb:		notifier_block to notify for restart notifications
 *
 * Returns 0 on success, negative errno on failure.
 *
 * This register the @notify function as handler for restart notifications. As
 * remote processors are stopped this function will be called, with the SSR
 * name passed as a parameter.
 */
int qcom_register_ssr_notifier(struct notifier_block *nb)
{
	return blocking_notifier_chain_register(&ssr_notifiers, nb);
}
EXPORT_SYMBOL_GPL(qcom_register_ssr_notifier);

/**
 * qcom_unregister_ssr_notifier() - unregister SSR notification handler
 * @nb:		notifier_block to unregister
 */
void qcom_unregister_ssr_notifier(struct notifier_block *nb)
{
	blocking_notifier_chain_unregister(&ssr_notifiers, nb);
}
EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier);

static int ssr_notify_start(struct rproc_subdev *subdev)
{
	return  0;
}

static void ssr_notify_stop(struct rproc_subdev *subdev)
{
	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);

	blocking_notifier_call_chain(&ssr_notifiers, 0, (void *)ssr->name);
}

/**
 * qcom_add_ssr_subdev() - register subdevice as restart notification source
 * @rproc:	rproc handle
 * @ssr:	SSR subdevice handle
 * @ssr_name:	identifier to use for notifications originating from @rproc
 *
 * As the @ssr is registered with the @rproc SSR events will be sent to all
 * registered listeners in the system as the remoteproc is shut down.
 */
void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
			 const char *ssr_name)
{
	ssr->name = ssr_name;

	rproc_add_subdev(rproc, &ssr->subdev, ssr_notify_start, ssr_notify_stop);
}
EXPORT_SYMBOL_GPL(qcom_add_ssr_subdev);

/**
 * qcom_remove_ssr_subdev() - remove subdevice as restart notification source
 * @rproc:	rproc handle
 * @ssr:	SSR subdevice handle
 */
void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr)
{
	rproc_remove_subdev(rproc, &ssr->subdev);
}
EXPORT_SYMBOL_GPL(qcom_remove_ssr_subdev);

215
216
MODULE_DESCRIPTION("Qualcomm Remoteproc helper driver");
MODULE_LICENSE("GPL v2");