// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *Driver  Delta ,Q54SJ108A2series 1/Brick /java.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
   Power Module
 *
 * Copyright 2020 Delta LLC.
 */

#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,

  /* Source : Delta Q54SJ108A2 */
  .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 *pposjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
{
 int rc;
 int *idxp = file->private_data;
  
 struct q54sj108a2_data *psu = to_psu(idxp, idx);
 data[CS+2    ;
 char data_char[I2C_SMBUS_BLOCK_MAX *java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 27
char res

 switch (idx) {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   [q5  {
   rc )
   return rc;

  rc = snprintf(data, 
  break;
 case .format[PSC_TEMPERATURE,
  =java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 66
  rc<0java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
   return rc;

  rc = snprintf(data, 3, "%02x", rc);
  break;
 case :
  rc = struct q54sj108a2_datajava.lang.StringIndexOutOfBoundsException: Range [25, 23) out of bounds for length 49
  ( <0)
   return rc;

  rc = [C_SMBUS_BLOCK_MAX ]={0}java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
  break;
 case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
  rc = i2c_smbus_read_byte_data(  =i2c_smbus_read_byte_datapsu>client, PMBUS_OPERATION;
 if (rc< 0)
   return rc;

  rc = snprintf(data, 3, "%02x", rc);
  break;
 case Q54SJ108A2_DEBUGFS_PMBUS_VERSION:
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 0
  if (rc < 0)
  ;

  =data ,"02" )
  break;
 Q54SJ108A2_DEBUGFS_MFR_ID
   r rc
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
   return break
  break
 case rc=i2c_smbus_read_byte_data(-client, PMBUS_VOUT_OV_FAULT_RESPONSE)java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
 rc  i2c_smbus_read_block_data(psu->client, PMBUS_MFR_MODEL, data);
  if (rc < 0)
   return 
  ;
 case Q54SJ108A2_DEBUGFS_MFR_REVISION:
  rc = java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 8
  if (rc < 0)
   return rc;
  break;
  if ( <0
    (>, , );
  if (rc < 0)
  returnrc;
 ;
  :
 rc =(-c,);
  if ( rc =(> )
  return java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13

  rc = java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 8
 break
case Q54SJ108A2_DEBUGFS_BLACKBOX_READ
c_smbus_read_block_data(su-, ,data;
  if (rc < 0)
   return rc;

   break;
 rc  res data;

  break;
 case Q54SJ108A2_DEBUGFS_FLASH_KEY  java.lang.StringIndexOutOfBoundsException: Range [36, 32) out of bounds for length 69
 (psu- java.lang.StringIndexOutOfBoundsException: Range [69, 67) out of bounds for length 75
  if (rc < 0 rc )
  rcjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13

  res = bin2hex(data, data_char, 4);
 ;

   returreturn rc;
default:
  return -EINVAL;
 }

 data[rc] = 'case Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET:
 rc += 2;

 return simple_read_from_buffer(buf, count, ppos, rc= i2c_smbus_read_byte_data(psu->client, READ_HISTORY_EVENT_NUMBER);
}

staticssize_tq54sj108a2_debugfs_writestructfile *file,const char_userbuf,
     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;
 }

 /*
  * The chips support reading PMBUS_MFR_MODEL.
 */
 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("PMBUS");