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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2019 Inspur Corp.
*/
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pmbus.h>
#include <linux/hwmon-sysfs.h>
#include "pmbus.h"
#define IPSPS_REG_VENDOR_ID 0x99
#define IPSPS_REG_MODEL 0x9A
#define IPSPS_REG_FW_VERSION 0x9B
#define IPSPS_REG_PN 0x9C
#define IPSPS_REG_SN 0x9E
#define IPSPS_REG_HW_VERSION 0xB0
#define IPSPS_REG_MODE 0xFC
#define MODE_ACTIVE 0x55
#define MODE_STANDBY 0x0E
#define MODE_REDUNDANCY 0x00
#define MODE_ACTIVE_STRING "active"
#define MODE_STANDBY_STRING "standby"
#define MODE_REDUNDANCY_STRING "redundancy"
enum ipsps_index {
vendor,
model,
fw_version,
part_number,
serial_number,
hw_version,
mode,
num_regs,
};
static const u8 ipsps_regs[num_regs] = {
[vendor] = IPSPS_REG_VENDOR_ID,
[model] = IPSPS_REG_MODEL,
[fw_version] = IPSPS_REG_FW_VERSION,
[part_number] = IPSPS_REG_PN,
[serial_number] = IPSPS_REG_SN,
[hw_version] = IPSPS_REG_HW_VERSION,
[mode] = IPSPS_REG_MODE,
};
static ssize_t ipsps_string_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
u8 reg;
int rc;
char *p;
char data[I2C_SMBUS_BLOCK_MAX + 1];
struct i2c_client *client = to_i2c_client(dev->parent);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
reg = ipsps_regs[attr->index];
rc = i2c_smbus_read_block_data(client, reg, data);
if (rc < 0)
return rc;
/* filled with printable characters, ending with # */
p = memscan(data, '#', rc);
*p = '\0';
return sysfs_emit(buf, "%s\n", data);
}
static ssize_t ipsps_fw_version_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
u8 reg;
int rc;
u8 data[I2C_SMBUS_BLOCK_MAX] = { 0 };
struct i2c_client *client = to_i2c_client(dev->parent);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
reg = ipsps_regs[attr->index];
rc = i2c_smbus_read_block_data(client, reg, data);
if (rc < 0)
return rc;
if (rc != 6)
return -EPROTO;
return sysfs_emit(buf, "%u.%02u%u-%u.%02u\n",
data[1], data[2]/* < 100 */, data[3]/*< 10*/,
data[4], data[5]/* < 100 */);
}
static ssize_t ipsps_mode_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
u8 reg;
int rc;
struct i2c_client *client = to_i2c_client(dev->parent);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
reg = ipsps_regs[attr->index];
rc = i2c_smbus_read_byte_data(client, reg);
if (rc < 0)
return rc;
switch (rc) {
case MODE_ACTIVE:
return sysfs_emit(buf, "[%s] %s %s\n",
MODE_ACTIVE_STRING,
MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
case MODE_STANDBY:
return sysfs_emit(buf, "%s [%s] %s\n",
MODE_ACTIVE_STRING,
MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
case MODE_REDUNDANCY:
return sysfs_emit(buf, "%s %s [%s]\n",
MODE_ACTIVE_STRING,
MODE_STANDBY_STRING, MODE_REDUNDANCY_STRING);
default:
return sysfs_emit(buf, "unspecified\n");
}
}
static ssize_t ipsps_mode_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
u8 reg;
int rc;
struct i2c_client *client = to_i2c_client(dev->parent);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
reg = ipsps_regs[attr->index];
if (sysfs_streq(MODE_STANDBY_STRING, buf)) {
rc = i2c_smbus_write_byte_data(client, reg,
MODE_STANDBY);
if (rc < 0)
return rc;
return count;
} else if (sysfs_streq(MODE_ACTIVE_STRING, buf)) {
rc = i2c_smbus_write_byte_data(client, reg,
MODE_ACTIVE);
if (rc < 0)
return rc;
return count;
}
return -EINVAL;
}
static SENSOR_DEVICE_ATTR_RO(vendor, ipsps_string, vendor);
static SENSOR_DEVICE_ATTR_RO(model, ipsps_string, model);
static SENSOR_DEVICE_ATTR_RO(part_number, ipsps_string, part_number);
static SENSOR_DEVICE_ATTR_RO(serial_number, ipsps_string, serial_number);
static SENSOR_DEVICE_ATTR_RO(hw_version, ipsps_string, hw_version);
static SENSOR_DEVICE_ATTR_RO(fw_version, ipsps_fw_version, fw_version);
static SENSOR_DEVICE_ATTR_RW(mode, ipsps_mode, mode);
static struct attribute *ipsps_attrs[] = {
&sensor_dev_attr_vendor.dev_attr.attr,
&sensor_dev_attr_model.dev_attr.attr,
&sensor_dev_attr_part_number.dev_attr.attr,
&sensor_dev_attr_serial_number.dev_attr.attr,
&sensor_dev_attr_hw_version.dev_attr.attr,
&sensor_dev_attr_fw_version.dev_attr.attr,
&sensor_dev_attr_mode.dev_attr.attr,
NULL,
};
ATTRIBUTE_GROUPS(ipsps);
static struct pmbus_driver_info ipsps_info = {
.pages = 1,
.func[0] = PMBUS_HAVE_VIN | PMBUS_HAVE_VOUT | PMBUS_HAVE_IOUT |
PMBUS_HAVE_IIN | PMBUS_HAVE_POUT | PMBUS_HAVE_PIN |
PMBUS_HAVE_FAN12 | PMBUS_HAVE_TEMP | PMBUS_HAVE_TEMP2 |
PMBUS_HAVE_TEMP3 | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_STATUS_IOUT | PMBUS_HAVE_STATUS_INPUT |
PMBUS_HAVE_STATUS_TEMP | PMBUS_HAVE_STATUS_FAN12,
.groups = ipsps_groups,
};
static struct pmbus_platform_data ipsps_pdata = {
.flags = PMBUS_SKIP_STATUS_CHECK,
};
static int ipsps_probe(struct i2c_client *client)
{
client->dev.platform_data = &ipsps_pdata;
return pmbus_do_probe(client, &ipsps_info);
}
static const struct i2c_device_id ipsps_id[] = {
{ "ipsps1", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, ipsps_id);
#ifdef CONFIG_OF
static const struct of_device_id ipsps_of_match[] = {
{ .compatible = "inspur,ipsps1" },
{}
};
MODULE_DEVICE_TABLE(of, ipsps_of_match);
#endif
static struct i2c_driver ipsps_driver = {
.driver = {
.name = "inspur-ipsps",
.of_match_table = of_match_ptr(ipsps_of_match),
},
.probe_new = ipsps_probe,
.id_table = ipsps_id,
};
module_i2c_driver(ipsps_driver);
MODULE_AUTHOR("John Wang");
MODULE_DESCRIPTION("PMBus driver for Inspur Power System power supplies");
MODULE_LICENSE("GPL");
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