#include <linux/debugfs.h>
#include <linux/i2c.h>
#include <linux/kstrtox.h>
#include <linux/module.h>
#include <linux/of.h>
#include "pmbus.h"
#define STORE_DEFAULT_ALL 0x11
#define ERASE_BLACKBOX_DATA 0xD1
#define READ_HISTORY_EVENT_NUMBER 0xD2
#define READ_HISTORY_EVENTS 0xE0
#define SET_HISTORY_EVENT_OFFSET 0xE1
#define PMBUS_FLASH_KEY_WRITE 0xEC
enum chips {
q54sj108a2
};
enum {
Q54SJ108A2_DEBUGFS_OPERATION = 0,
Q54SJ108A2_DEBUGFS_CLEARFAULT,
Q54SJ108A2_DEBUGFS_WRITEPROTECT,
Q54SJ108A2_DEBUGFS_STOREDEFAULT,
Q54SJ108A2_DEBUGFS_VOOV_RESPONSE,
Q54SJ108A2_DEBUGFS_IOOC_RESPONSE,
Q54SJ108A2_DEBUGFS_PMBUS_VERSION,
Q54SJ108A2_DEBUGFS_MFR_ID,
Q54SJ108A2_DEBUGFS_MFR_MODEL,
Q54SJ108A2_DEBUGFS_MFR_REVISION,
Q54SJ108A2_DEBUGFS_MFR_LOCATION,
Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE,
Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET,
Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET,
Q54SJ108A2_DEBUGFS_BLACKBOX_READ,
Q54SJ108A2_DEBUGFS_FLASH_KEY,
Q54SJ108A2_DEBUGFS_NUM_ENTRIES
};
struct q54sj108a2_data {
enum chips chip;
struct i2c_client *client;
int debugfs_entries[Q54SJ108A2_DEBUGFS_NUM_ENTRIES];
};
#define to_psu(x, y) container_of((x), struct q54sj108a2_data, debugfs_entries[(y)])
static struct pmbus_driver_info q54sj108a2_info[] = {
[q54sj108a2] = {
.pages = 1,
.format[PSC_TEMPERATURE] = linear,
.format[PSC_VOLTAGE_IN] = linear,
.format[PSC_CURRENT_OUT] = linear,
.func[0] = PMBUS_HAVE_VIN |
PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
PMBUS_HAVE_STATUS_INPUT,
},
};
static ssize_t q54sj108a2_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
int rc;
int *idxp = file->private_data;
int idx = *idxp;
struct q54sj108a2_data *psu = to_psu(idxp, idx);
char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
char data_char[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
char *res;
switch (idx) {
case Q54SJ108A2_DEBUGFS_OPERATION:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_WRITEPROTECT:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_WRITE_PROTECT);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_PMBUS_VERSION:
rc = i2c_smbus_read_byte_data(psu->client, PMBUS_REVISION);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_MFR_ID:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_ID, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_MFR_MODEL:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_MODEL, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_MFR_REVISION:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_REVISION, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_MFR_LOCATION:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_LOCATION, data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET:
rc = i2c_smbus_read_byte_data(psu->client, READ_HISTORY_EVENT_NUMBER);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_READ:
rc = i2c_smbus_read_block_data(psu->client, READ_HISTORY_EVENTS, data);
if (rc < 0)
return rc;
res = bin2hex(data, data_char, 32);
rc = res - data;
break;
case Q54SJ108A2_DEBUGFS_FLASH_KEY:
rc = i2c_smbus_read_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, data);
if (rc < 0)
return rc;
res = bin2hex(data, data_char, 4);
rc = res - data;
break;
default:
return -EINVAL;
}
data[rc] = '\n';
rc += 2;
return simple_read_from_buffer(buf, count, ppos, data, rc);
}
static ssize_t q54sj108a2_debugfs_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
u8 flash_key[4];
u8 dst_data;
ssize_t rc;
int *idxp = file->private_data;
int idx = *idxp;
struct q54sj108a2_data *psu = to_psu(idxp, idx);
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_WRITE_PROTECT, 0);
if (rc)
return rc;
switch (idx) {
case Q54SJ108A2_DEBUGFS_OPERATION:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_OPERATION, dst_data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_CLEARFAULT:
rc = i2c_smbus_write_byte(psu->client, PMBUS_CLEAR_FAULTS);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_STOREDEFAULT:
flash_key[0] = 0x7E;
flash_key[1] = 0x15;
flash_key[2] = 0xDC;
flash_key[3] = 0x42;
rc = i2c_smbus_write_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, 4, flash_key);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte(psu->client, STORE_DEFAULT_ALL);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE, dst_data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE, dst_data);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE:
rc = i2c_smbus_write_byte(psu->client, ERASE_BLACKBOX_DATA);
if (rc < 0)
return rc;
break;
case Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET:
rc = kstrtou8_from_user(buf, count, 0, &dst_data);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client, SET_HISTORY_EVENT_OFFSET, dst_data);
if (rc < 0)
return rc;
break;
default:
return -EINVAL;
}
return count;
}
static const struct file_operations q54sj108a2_fops = {
.llseek = noop_llseek,
.read = q54sj108a2_debugfs_read,
.write = q54sj108a2_debugfs_write,
.open = simple_open,
};
static const struct i2c_device_id q54sj108a2_id[] = {
{ "q54sj108a2", q54sj108a2 },
{ },
};
MODULE_DEVICE_TABLE(i2c, q54sj108a2_id);
static int q54sj108a2_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
enum chips chip_id;
int ret, i;
struct dentry *debugfs;
struct dentry *q54sj108a2_dir;
struct q54sj108a2_data *psu;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA))
return -ENODEV;
if (client->dev.of_node)
chip_id = (enum chips)(unsigned long)of_device_get_match_data(dev);
else
chip_id = i2c_match_id(q54sj108a2_id, client)->driver_data;
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
if (ret < 0) {
dev_err(&client->dev, "Failed to read Manufacturer ID\n");
return ret;
}
if (ret != 6 || strncmp(buf, "DELTA", 5)) {
buf[ret] = '\0';
dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);
return -ENODEV;
}
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
if (ret < 0) {
dev_err(dev, "Failed to read Manufacturer Model\n");
return ret;
}
if (ret != 14 || strncmp(buf, "Q54SJ108A2", 10)) {
buf[ret] = '\0';
dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
return -ENODEV;
}
ret = i2c_smbus_read_block_data(client, PMBUS_MFR_REVISION, buf);
if (ret < 0) {
dev_err(dev, "Failed to read Manufacturer Revision\n");
return ret;
}
if (ret != 4 || buf[0] != 'S') {
buf[ret] = '\0';
dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
return -ENODEV;
}
ret = pmbus_do_probe(client, &q54sj108a2_info[chip_id]);
if (ret)
return ret;
psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
if (!psu)
return 0;
psu->client = client;
debugfs = pmbus_get_debugfs_dir(client);
q54sj108a2_dir = debugfs_create_dir(client->name, debugfs);
for (i = 0; i < Q54SJ108A2_DEBUGFS_NUM_ENTRIES; ++i)
psu->debugfs_entries[i] = i;
debugfs_create_file("operation", 0644, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_OPERATION],
&q54sj108a2_fops);
debugfs_create_file("clear_fault", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_CLEARFAULT],
&q54sj108a2_fops);
debugfs_create_file("write_protect", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_WRITEPROTECT],
&q54sj108a2_fops);
debugfs_create_file("store_default", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_STOREDEFAULT],
&q54sj108a2_fops);
debugfs_create_file("vo_ov_response", 0644, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_VOOV_RESPONSE],
&q54sj108a2_fops);
debugfs_create_file("io_oc_response", 0644, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_IOOC_RESPONSE],
&q54sj108a2_fops);
debugfs_create_file("pmbus_revision", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_PMBUS_VERSION],
&q54sj108a2_fops);
debugfs_create_file("mfr_id", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_ID],
&q54sj108a2_fops);
debugfs_create_file("mfr_model", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_MODEL],
&q54sj108a2_fops);
debugfs_create_file("mfr_revision", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_REVISION],
&q54sj108a2_fops);
debugfs_create_file("mfr_location", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_MFR_LOCATION],
&q54sj108a2_fops);
debugfs_create_file("blackbox_erase", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE],
&q54sj108a2_fops);
debugfs_create_file("blackbox_read_offset", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET],
&q54sj108a2_fops);
debugfs_create_file("blackbox_set_offset", 0200, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET],
&q54sj108a2_fops);
debugfs_create_file("blackbox_read", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_BLACKBOX_READ],
&q54sj108a2_fops);
debugfs_create_file("flash_key", 0444, q54sj108a2_dir,
&psu->debugfs_entries[Q54SJ108A2_DEBUGFS_FLASH_KEY],
&q54sj108a2_fops);
return 0;
}
static const struct of_device_id q54sj108a2_of_match[] = {
{ .compatible = "delta,q54sj108a2", .data = (void *)q54sj108a2 },
{ },
};
MODULE_DEVICE_TABLE(of, q54sj108a2_of_match);
static struct i2c_driver q54sj108a2_driver = {
.driver = {
.name = "q54sj108a2",
.of_match_table = q54sj108a2_of_match,
},
.probe = q54sj108a2_probe,
.id_table = q54sj108a2_id,
};
module_i2c_driver(q54sj108a2_driver);
MODULE_AUTHOR("Xiao.Ma <xiao.mx.ma@deltaww.com>");
MODULE_DESCRIPTION("PMBus driver for Delta Q54SJ108A2 series modules");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS