summaryrefslogtreecommitdiff
path: root/drivers/soundwire/sysfs_slave.c
blob: b48b6617a3964115d41aa871b40097c446e83ff3 (plain)
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
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
// SPDX-License-Identifier: GPL-2.0-only
// Copyright(c) 2015-2020 Intel Corporation.

#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include "bus.h"
#include "sysfs_local.h"

/*
 * Slave sysfs
 */

/*
 * The sysfs for Slave reflects the MIPI description as given
 * in the MIPI DisCo spec.
 * status and device_number come directly from the MIPI SoundWire
 * 1.x specification.
 *
 * Base file is device
 *	|---- status
 *	|---- device_number
 *	|---- modalias
 *	|---- dev-properties
 *		|---- mipi_revision
 *		|---- wake_capable
 *		|---- test_mode_capable
 *		|---- clk_stop_mode1
 *		|---- simple_clk_stop_capable
 *		|---- clk_stop_timeout
 *		|---- ch_prep_timeout
 *		|---- reset_behave
 *		|---- high_PHY_capable
 *		|---- paging_support
 *		|---- bank_delay_support
 *		|---- p15_behave
 *		|---- master_count
 *		|---- source_ports
 *		|---- sink_ports
 *	|---- dp0
 *		|---- max_word
 *		|---- min_word
 *		|---- words
 *		|---- BRA_flow_controlled
 *		|---- simple_ch_prep_sm
 *		|---- imp_def_interrupts
 *	|---- dpN_<sink/src>
 *		|---- max_word
 *		|---- min_word
 *		|---- words
 *		|---- type
 *		|---- max_grouping
 *		|---- simple_ch_prep_sm
 *		|---- ch_prep_timeout
 *		|---- imp_def_interrupts
 *		|---- min_ch
 *		|---- max_ch
 *		|---- channels
 *		|---- ch_combinations
 *		|---- max_async_buffer
 *		|---- block_pack_mode
 *		|---- port_encoding
 *
 */

#define sdw_slave_attr(field, format_string)			\
static ssize_t field##_show(struct device *dev,			\
			    struct device_attribute *attr,	\
			    char *buf)				\
{								\
	struct sdw_slave *slave = dev_to_sdw_dev(dev);		\
	return sprintf(buf, format_string, slave->prop.field);	\
}								\
static DEVICE_ATTR_RO(field)

sdw_slave_attr(mipi_revision, "0x%x\n");
sdw_slave_attr(wake_capable, "%d\n");
sdw_slave_attr(test_mode_capable, "%d\n");
sdw_slave_attr(clk_stop_mode1, "%d\n");
sdw_slave_attr(simple_clk_stop_capable, "%d\n");
sdw_slave_attr(clk_stop_timeout, "%d\n");
sdw_slave_attr(ch_prep_timeout, "%d\n");
sdw_slave_attr(reset_behave, "%d\n");
sdw_slave_attr(high_PHY_capable, "%d\n");
sdw_slave_attr(paging_support, "%d\n");
sdw_slave_attr(bank_delay_support, "%d\n");
sdw_slave_attr(p15_behave, "%d\n");
sdw_slave_attr(master_count, "%d\n");
sdw_slave_attr(source_ports, "0x%x\n");
sdw_slave_attr(sink_ports, "0x%x\n");

static ssize_t modalias_show(struct device *dev,
			     struct device_attribute *attr, char *buf)
{
	struct sdw_slave *slave = dev_to_sdw_dev(dev);

	return sdw_slave_modalias(slave, buf, 256);
}
static DEVICE_ATTR_RO(modalias);

static struct attribute *slave_attrs[] = {
	&dev_attr_modalias.attr,
	NULL,
};
ATTRIBUTE_GROUPS(slave);

static struct attribute *slave_dev_attrs[] = {
	&dev_attr_mipi_revision.attr,
	&dev_attr_wake_capable.attr,
	&dev_attr_test_mode_capable.attr,
	&dev_attr_clk_stop_mode1.attr,
	&dev_attr_simple_clk_stop_capable.attr,
	&dev_attr_clk_stop_timeout.attr,
	&dev_attr_ch_prep_timeout.attr,
	&dev_attr_reset_behave.attr,
	&dev_attr_high_PHY_capable.attr,
	&dev_attr_paging_support.attr,
	&dev_attr_bank_delay_support.attr,
	&dev_attr_p15_behave.attr,
	&dev_attr_master_count.attr,
	&dev_attr_source_ports.attr,
	&dev_attr_sink_ports.attr,
	NULL,
};

/*
 * we don't use ATTRIBUTES_GROUP here since we want to add a subdirectory
 * for device-level properties
 */
static struct attribute_group sdw_slave_dev_attr_group = {
	.attrs	= slave_dev_attrs,
	.name = "dev-properties",
};

/*
 * DP0 sysfs
 */

#define sdw_dp0_attr(field, format_string)				\
static ssize_t field##_show(struct device *dev,				\
			    struct device_attribute *attr,		\
			    char *buf)					\
{									\
	struct sdw_slave *slave = dev_to_sdw_dev(dev);			\
	return sprintf(buf, format_string, slave->prop.dp0_prop->field);\
}									\
static DEVICE_ATTR_RO(field)

sdw_dp0_attr(max_word, "%d\n");
sdw_dp0_attr(min_word, "%d\n");
sdw_dp0_attr(BRA_flow_controlled, "%d\n");
sdw_dp0_attr(simple_ch_prep_sm, "%d\n");
sdw_dp0_attr(imp_def_interrupts, "0x%x\n");

static ssize_t words_show(struct device *dev,
			  struct device_attribute *attr, char *buf)
{
	struct sdw_slave *slave = dev_to_sdw_dev(dev);
	ssize_t size = 0;
	int i;

	for (i = 0; i < slave->prop.dp0_prop->num_words; i++)
		size += sprintf(buf + size, "%d ",
				slave->prop.dp0_prop->words[i]);
	size += sprintf(buf + size, "\n");

	return size;
}
static DEVICE_ATTR_RO(words);

static struct attribute *dp0_attrs[] = {
	&dev_attr_max_word.attr,
	&dev_attr_min_word.attr,
	&dev_attr_words.attr,
	&dev_attr_BRA_flow_controlled.attr,
	&dev_attr_simple_ch_prep_sm.attr,
	&dev_attr_imp_def_interrupts.attr,
	NULL,
};

/*
 * we don't use ATTRIBUTES_GROUP here since we want to add a subdirectory
 * for dp0-level properties
 */
static const struct attribute_group dp0_group = {
	.attrs = dp0_attrs,
	.name = "dp0",
};

int sdw_slave_sysfs_init(struct sdw_slave *slave)
{
	int ret;

	ret = devm_device_add_groups(&slave->dev, slave_groups);
	if (ret < 0)
		return ret;

	ret = devm_device_add_group(&slave->dev, &sdw_slave_dev_attr_group);
	if (ret < 0)
		return ret;

	if (slave->prop.dp0_prop) {
		ret = devm_device_add_group(&slave->dev, &dp0_group);
		if (ret < 0)
			return ret;
	}

	if (slave->prop.source_ports || slave->prop.sink_ports) {
		ret = sdw_slave_sysfs_dpn_init(slave);
		if (ret < 0)
			return ret;
	}

	return 0;
}

/*
 * the status is shown in capital letters for UNATTACHED and RESERVED
 * on purpose, to highligh users to the fact that these status values
 * are not expected.
 */
static const char *const slave_status[] = {
	[SDW_SLAVE_UNATTACHED] =  "UNATTACHED",
	[SDW_SLAVE_ATTACHED] = "Attached",
	[SDW_SLAVE_ALERT] = "Alert",
	[SDW_SLAVE_RESERVED] = "RESERVED",
};

static ssize_t status_show(struct device *dev,
			   struct device_attribute *attr, char *buf)
{
	struct sdw_slave *slave = dev_to_sdw_dev(dev);

	return sprintf(buf, "%s\n", slave_status[slave->status]);
}
static DEVICE_ATTR_RO(status);

static ssize_t device_number_show(struct device *dev,
				  struct device_attribute *attr, char *buf)
{
	struct sdw_slave *slave = dev_to_sdw_dev(dev);

	if (slave->status == SDW_SLAVE_UNATTACHED)
		return sprintf(buf, "%s", "N/A");
	else
		return sprintf(buf, "%d", slave->dev_num);
}
static DEVICE_ATTR_RO(device_number);

static struct attribute *slave_status_attrs[] = {
	&dev_attr_status.attr,
	&dev_attr_device_number.attr,
	NULL,
};

/*
 * we don't use ATTRIBUTES_GROUP here since the group is used in a
 * separate file and can't be handled as a static.
 */
static const struct attribute_group sdw_slave_status_attr_group = {
	.attrs	= slave_status_attrs,
};

const struct attribute_group *sdw_slave_status_attr_groups[] = {
	&sdw_slave_status_attr_group,
	NULL
};