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// SPDX-License-Identifier: GPL-2.0
#include <linux/mtd/spi-nor.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
#include <linux/sysfs.h>
#include "core.h"
static ssize_t manufacturer_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct spi_device *spi = to_spi_device(dev);
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
return sysfs_emit(buf, "%s\n", nor->manufacturer->name);
}
static DEVICE_ATTR_RO(manufacturer);
static ssize_t partname_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct spi_device *spi = to_spi_device(dev);
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
return sysfs_emit(buf, "%s\n", nor->info->name);
}
static DEVICE_ATTR_RO(partname);
static ssize_t jedec_id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct spi_device *spi = to_spi_device(dev);
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
const u8 *id = nor->info->id_len ? nor->info->id : nor->id;
u8 id_len = nor->info->id_len ?: SPI_NOR_MAX_ID_LEN;
return sysfs_emit(buf, "%*phN\n", id_len, id);
}
static DEVICE_ATTR_RO(jedec_id);
static struct attribute *spi_nor_sysfs_entries[] = {
&dev_attr_manufacturer.attr,
&dev_attr_partname.attr,
&dev_attr_jedec_id.attr,
NULL
};
static ssize_t sfdp_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr, char *buf,
loff_t off, size_t count)
{
struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
struct sfdp *sfdp = nor->sfdp;
size_t sfdp_size = sfdp->num_dwords * sizeof(*sfdp->dwords);
return memory_read_from_buffer(buf, count, &off, nor->sfdp->dwords,
sfdp_size);
}
static BIN_ATTR_RO(sfdp, 0);
static struct bin_attribute *spi_nor_sysfs_bin_entries[] = {
&bin_attr_sfdp,
NULL
};
static umode_t spi_nor_sysfs_is_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
if (attr == &dev_attr_manufacturer.attr && !nor->manufacturer)
return 0;
if (attr == &dev_attr_jedec_id.attr && !nor->info->id_len && !nor->id)
return 0;
return 0444;
}
static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj,
struct bin_attribute *attr, int n)
{
struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
struct spi_mem *spimem = spi_get_drvdata(spi);
struct spi_nor *nor = spi_mem_get_drvdata(spimem);
if (attr == &bin_attr_sfdp && nor->sfdp)
return 0444;
return 0;
}
static const struct attribute_group spi_nor_sysfs_group = {
.name = "spi-nor",
.is_visible = spi_nor_sysfs_is_visible,
.is_bin_visible = spi_nor_sysfs_is_bin_visible,
.attrs = spi_nor_sysfs_entries,
.bin_attrs = spi_nor_sysfs_bin_entries,
};
const struct attribute_group *spi_nor_sysfs_groups[] = {
&spi_nor_sysfs_group,
NULL
};
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