#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"
struct dpn_attribute {
struct device_attribute dev_attr;
int N;
int dir;
const char *format_string;
};
#define SDW_DPN_ATTRIBUTES 15
#define sdw_dpn_attribute_alloc(field) \
static int field##_attribute_alloc(struct device *dev, \
struct attribute **res, \
int N, int dir, \
const char *format_string) \
{ \
struct dpn_attribute *dpn_attr; \
\
dpn_attr = devm_kzalloc(dev, sizeof(*dpn_attr), GFP_KERNEL); \
if (!dpn_attr) \
return -ENOMEM; \
dpn_attr->N = N; \
dpn_attr->dir = dir; \
sysfs_attr_init(&dpn_attr->dev_attr.attr); \
dpn_attr->format_string = format_string; \
dpn_attr->dev_attr.attr.name = __stringify(field); \
dpn_attr->dev_attr.attr.mode = 0444; \
dpn_attr->dev_attr.show = field##_show; \
\
*res = &dpn_attr->dev_attr.attr; \
\
return 0; \
}
#define sdw_dpn_attr(field) \
\
static ssize_t field##_dpn_show(struct sdw_slave *slave, \
int N, \
int dir, \
const char *format_string, \
char *buf) \
{ \
struct sdw_dpn_prop *dpn; \
unsigned long mask; \
int bit; \
int i; \
\
if (dir) { \
dpn = slave->prop.src_dpn_prop; \
mask = slave->prop.source_ports; \
} else { \
dpn = slave->prop.sink_dpn_prop; \
mask = slave->prop.sink_ports; \
} \
\
i = 0; \
for_each_set_bit(bit, &mask, 32) { \
if (bit == N) { \
return sprintf(buf, format_string, \
dpn[i].field); \
} \
i++; \
} \
return -EINVAL; \
} \
\
static ssize_t field##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct sdw_slave *slave = dev_to_sdw_dev(dev); \
struct dpn_attribute *dpn_attr = \
container_of(attr, struct dpn_attribute, dev_attr); \
\
return field##_dpn_show(slave, \
dpn_attr->N, dpn_attr->dir, \
dpn_attr->format_string, \
buf); \
} \
sdw_dpn_attribute_alloc(field)
sdw_dpn_attr(imp_def_interrupts);
sdw_dpn_attr(max_word);
sdw_dpn_attr(min_word);
sdw_dpn_attr(type);
sdw_dpn_attr(max_grouping);
sdw_dpn_attr(simple_ch_prep_sm);
sdw_dpn_attr(ch_prep_timeout);
sdw_dpn_attr(max_ch);
sdw_dpn_attr(min_ch);
sdw_dpn_attr(max_async_buffer);
sdw_dpn_attr(block_pack_mode);
sdw_dpn_attr(port_encoding);
#define sdw_dpn_array_attr(field) \
\
static ssize_t field##_dpn_show(struct sdw_slave *slave, \
int N, \
int dir, \
const char *format_string, \
char *buf) \
{ \
struct sdw_dpn_prop *dpn; \
unsigned long mask; \
ssize_t size = 0; \
int bit; \
int i; \
int j; \
\
if (dir) { \
dpn = slave->prop.src_dpn_prop; \
mask = slave->prop.source_ports; \
} else { \
dpn = slave->prop.sink_dpn_prop; \
mask = slave->prop.sink_ports; \
} \
\
i = 0; \
for_each_set_bit(bit, &mask, 32) { \
if (bit == N) { \
for (j = 0; j < dpn[i].num_##field; j++) \
size += sprintf(buf + size, \
format_string, \
dpn[i].field[j]); \
size += sprintf(buf + size, "\n"); \
return size; \
} \
i++; \
} \
return -EINVAL; \
} \
static ssize_t field##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct sdw_slave *slave = dev_to_sdw_dev(dev); \
struct dpn_attribute *dpn_attr = \
container_of(attr, struct dpn_attribute, dev_attr); \
\
return field##_dpn_show(slave, \
dpn_attr->N, dpn_attr->dir, \
dpn_attr->format_string, \
buf); \
} \
sdw_dpn_attribute_alloc(field)
sdw_dpn_array_attr(words);
sdw_dpn_array_attr(ch_combinations);
sdw_dpn_array_attr(channels);
static int add_all_attributes(struct device *dev, int N, int dir)
{
struct attribute **dpn_attrs;
struct attribute_group *dpn_group;
int i = 0;
int ret;
dpn_attrs = devm_kcalloc(dev, SDW_DPN_ATTRIBUTES + 1,
sizeof(struct attribute *),
GFP_KERNEL);
if (!dpn_attrs)
return -ENOMEM;
ret = max_word_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = min_word_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = words_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = type_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = max_grouping_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = simple_ch_prep_sm_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = ch_prep_timeout_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = imp_def_interrupts_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "0x%x\n");
if (ret < 0)
return ret;
ret = min_ch_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = max_ch_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = channels_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = ch_combinations_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = max_async_buffer_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = block_pack_mode_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
ret = port_encoding_attribute_alloc(dev, &dpn_attrs[i++],
N, dir, "%d\n");
if (ret < 0)
return ret;
if (i != SDW_DPN_ATTRIBUTES) {
dev_err(dev, "mismatch in attributes, allocated %d got %d\n",
SDW_DPN_ATTRIBUTES, i);
return -EINVAL;
}
dpn_group = devm_kzalloc(dev, sizeof(*dpn_group), GFP_KERNEL);
if (!dpn_group)
return -ENOMEM;
dpn_group->attrs = dpn_attrs;
dpn_group->name = devm_kasprintf(dev, GFP_KERNEL, "dp%d_%s",
N, dir ? "src" : "sink");
if (!dpn_group->name)
return -ENOMEM;
ret = devm_device_add_group(dev, dpn_group);
if (ret < 0)
return ret;
return 0;
}
int sdw_slave_sysfs_dpn_init(struct sdw_slave *slave)
{
unsigned long mask;
int ret;
int i;
if (!slave->prop.source_ports && !slave->prop.sink_ports)
return 0;
mask = slave->prop.source_ports;
for_each_set_bit(i, &mask, 32) {
ret = add_all_attributes(&slave->dev, i, 1);
if (ret < 0)
return ret;
}
mask = slave->prop.sink_ports;
for_each_set_bit(i, &mask, 32) {
ret = add_all_attributes(&slave->dev, i, 0);
if (ret < 0)
return ret;
}
return 0;
}
