425 lines
11 KiB
C
425 lines
11 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Driver for Delta modules, Q54SJ108A2 series 1/4 Brick DC/DC
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* Regulated Power Module
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*
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* Copyright 2020 Delta LLC.
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*/
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#include <linux/debugfs.h>
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#include <linux/i2c.h>
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#include <linux/kstrtox.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include "pmbus.h"
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#define STORE_DEFAULT_ALL 0x11
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#define ERASE_BLACKBOX_DATA 0xD1
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#define READ_HISTORY_EVENT_NUMBER 0xD2
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#define READ_HISTORY_EVENTS 0xE0
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#define SET_HISTORY_EVENT_OFFSET 0xE1
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#define PMBUS_FLASH_KEY_WRITE 0xEC
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enum chips {
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q54sj108a2
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};
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enum {
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Q54SJ108A2_DEBUGFS_OPERATION = 0,
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Q54SJ108A2_DEBUGFS_CLEARFAULT,
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Q54SJ108A2_DEBUGFS_WRITEPROTECT,
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Q54SJ108A2_DEBUGFS_STOREDEFAULT,
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Q54SJ108A2_DEBUGFS_VOOV_RESPONSE,
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Q54SJ108A2_DEBUGFS_IOOC_RESPONSE,
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Q54SJ108A2_DEBUGFS_PMBUS_VERSION,
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Q54SJ108A2_DEBUGFS_MFR_ID,
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Q54SJ108A2_DEBUGFS_MFR_MODEL,
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Q54SJ108A2_DEBUGFS_MFR_REVISION,
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Q54SJ108A2_DEBUGFS_MFR_LOCATION,
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Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE,
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Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET,
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Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET,
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Q54SJ108A2_DEBUGFS_BLACKBOX_READ,
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Q54SJ108A2_DEBUGFS_FLASH_KEY,
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Q54SJ108A2_DEBUGFS_NUM_ENTRIES
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};
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struct q54sj108a2_data {
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enum chips chip;
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struct i2c_client *client;
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int debugfs_entries[Q54SJ108A2_DEBUGFS_NUM_ENTRIES];
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};
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#define to_psu(x, y) container_of((x), struct q54sj108a2_data, debugfs_entries[(y)])
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static struct pmbus_driver_info q54sj108a2_info[] = {
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[q54sj108a2] = {
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.pages = 1,
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/* Source : Delta Q54SJ108A2 */
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.format[PSC_TEMPERATURE] = linear,
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.format[PSC_VOLTAGE_IN] = linear,
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.format[PSC_CURRENT_OUT] = linear,
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.func[0] = PMBUS_HAVE_VIN |
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PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
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PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
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PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
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PMBUS_HAVE_STATUS_INPUT,
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},
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};
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static ssize_t q54sj108a2_debugfs_read(struct file *file, char __user *buf,
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size_t count, loff_t *ppos)
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{
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int rc;
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int *idxp = file->private_data;
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int idx = *idxp;
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struct q54sj108a2_data *psu = to_psu(idxp, idx);
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char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
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char data_char[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
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char *res;
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switch (idx) {
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case Q54SJ108A2_DEBUGFS_OPERATION:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_WRITEPROTECT:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_WRITE_PROTECT);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_PMBUS_VERSION:
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rc = i2c_smbus_read_byte_data(psu->client, PMBUS_REVISION);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_MFR_ID:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_ID, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_MFR_MODEL:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_MODEL, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_MFR_REVISION:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_REVISION, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_MFR_LOCATION:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_MFR_LOCATION, data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_READ_OFFSET:
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rc = i2c_smbus_read_byte_data(psu->client, READ_HISTORY_EVENT_NUMBER);
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if (rc < 0)
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return rc;
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rc = snprintf(data, 3, "%02x", rc);
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_READ:
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rc = i2c_smbus_read_block_data(psu->client, READ_HISTORY_EVENTS, data);
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if (rc < 0)
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return rc;
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res = bin2hex(data, data_char, 32);
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rc = res - data;
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break;
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case Q54SJ108A2_DEBUGFS_FLASH_KEY:
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rc = i2c_smbus_read_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, data);
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if (rc < 0)
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return rc;
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res = bin2hex(data, data_char, 4);
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rc = res - data;
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break;
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default:
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return -EINVAL;
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}
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data[rc] = '\n';
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rc += 2;
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return simple_read_from_buffer(buf, count, ppos, data, rc);
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}
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static ssize_t q54sj108a2_debugfs_write(struct file *file, const char __user *buf,
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size_t count, loff_t *ppos)
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{
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u8 flash_key[4];
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u8 dst_data;
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ssize_t rc;
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int *idxp = file->private_data;
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int idx = *idxp;
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struct q54sj108a2_data *psu = to_psu(idxp, idx);
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_WRITE_PROTECT, 0);
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if (rc)
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return rc;
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switch (idx) {
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case Q54SJ108A2_DEBUGFS_OPERATION:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_OPERATION, dst_data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_CLEARFAULT:
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rc = i2c_smbus_write_byte(psu->client, PMBUS_CLEAR_FAULTS);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_STOREDEFAULT:
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flash_key[0] = 0x7E;
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flash_key[1] = 0x15;
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flash_key[2] = 0xDC;
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flash_key[3] = 0x42;
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rc = i2c_smbus_write_block_data(psu->client, PMBUS_FLASH_KEY_WRITE, 4, flash_key);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte(psu->client, STORE_DEFAULT_ALL);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_VOOV_RESPONSE:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_VOUT_OV_FAULT_RESPONSE, dst_data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_IOOC_RESPONSE:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, PMBUS_IOUT_OC_FAULT_RESPONSE, dst_data);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_ERASE:
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rc = i2c_smbus_write_byte(psu->client, ERASE_BLACKBOX_DATA);
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if (rc < 0)
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return rc;
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break;
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case Q54SJ108A2_DEBUGFS_BLACKBOX_SET_OFFSET:
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rc = kstrtou8_from_user(buf, count, 0, &dst_data);
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if (rc < 0)
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return rc;
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rc = i2c_smbus_write_byte_data(psu->client, SET_HISTORY_EVENT_OFFSET, dst_data);
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if (rc < 0)
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return rc;
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break;
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default:
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return -EINVAL;
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}
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return count;
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}
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static const struct file_operations q54sj108a2_fops = {
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.llseek = noop_llseek,
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.read = q54sj108a2_debugfs_read,
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.write = q54sj108a2_debugfs_write,
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.open = simple_open,
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};
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static const struct i2c_device_id q54sj108a2_id[] = {
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{ "q54sj108a2", q54sj108a2 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, q54sj108a2_id);
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static int q54sj108a2_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
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enum chips chip_id;
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int ret, i;
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struct dentry *debugfs;
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struct dentry *q54sj108a2_dir;
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struct q54sj108a2_data *psu;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_BYTE_DATA |
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I2C_FUNC_SMBUS_WORD_DATA |
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I2C_FUNC_SMBUS_BLOCK_DATA))
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return -ENODEV;
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if (client->dev.of_node)
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chip_id = (enum chips)(unsigned long)of_device_get_match_data(dev);
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else
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chip_id = i2c_match_id(q54sj108a2_id, client)->driver_data;
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read Manufacturer ID\n");
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return ret;
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}
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if (ret != 6 || strncmp(buf, "DELTA", 5)) {
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buf[ret] = '\0';
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dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);
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return -ENODEV;
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}
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/*
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* The chips support reading PMBUS_MFR_MODEL.
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*/
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
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if (ret < 0) {
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dev_err(dev, "Failed to read Manufacturer Model\n");
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return ret;
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}
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if (ret != 14 || strncmp(buf, "Q54SJ108A2", 10)) {
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buf[ret] = '\0';
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dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
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return -ENODEV;
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}
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ret = i2c_smbus_read_block_data(client, PMBUS_MFR_REVISION, buf);
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if (ret < 0) {
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dev_err(dev, "Failed to read Manufacturer Revision\n");
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return ret;
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}
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if (ret != 4 || buf[0] != 'S') {
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buf[ret] = '\0';
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dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
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return -ENODEV;
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}
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ret = pmbus_do_probe(client, &q54sj108a2_info[chip_id]);
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if (ret)
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return ret;
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psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
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if (!psu)
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return 0;
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psu->client = client;
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debugfs = pmbus_get_debugfs_dir(client);
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|
||
|
|
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_new = 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);
|