^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * MEN 14F021P00 Board Management Controller (BMC) MFD Core Driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2014 MEN Mikro Elektronik Nuernberg GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define BMC_CMD_WDT_EXIT_PROD 0x18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define BMC_CMD_WDT_PROD_STAT 0x19
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define BMC_CMD_REV_MAJOR 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define BMC_CMD_REV_MINOR 0x81
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define BMC_CMD_REV_MAIN 0x82
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static struct mfd_cell menf21bmc_cell[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) { .name = "menf21bmc_wdt", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) { .name = "menf21bmc_led", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) { .name = "menf21bmc_hwmon", }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static int menf21bmc_wdt_exit_prod_mode(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int val, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) val = i2c_smbus_read_byte_data(client, BMC_CMD_WDT_PROD_STAT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (val < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * Production mode should be not active after delivery of the Board.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * To be sure we check it, inform the user and exit the mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * if active.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (val == 0x00) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) dev_info(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) "BMC in production mode. Exit production mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) ret = i2c_smbus_write_byte(client, BMC_CMD_WDT_EXIT_PROD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) menf21bmc_probe(struct i2c_client *client, const struct i2c_device_id *ids)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) int rev_major, rev_minor, rev_main;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ret = i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) I2C_FUNC_SMBUS_BYTE_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) I2C_FUNC_SMBUS_WORD_DATA |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) I2C_FUNC_SMBUS_BYTE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) rev_major = i2c_smbus_read_word_data(client, BMC_CMD_REV_MAJOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (rev_major < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) dev_err(&client->dev, "failed to get BMC major revision\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return rev_major;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) rev_minor = i2c_smbus_read_word_data(client, BMC_CMD_REV_MINOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (rev_minor < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) dev_err(&client->dev, "failed to get BMC minor revision\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return rev_minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) rev_main = i2c_smbus_read_word_data(client, BMC_CMD_REV_MAIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (rev_main < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) dev_err(&client->dev, "failed to get BMC main revision\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return rev_main;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) dev_info(&client->dev, "FW Revision: %02d.%02d.%02d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) rev_major, rev_minor, rev_main);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * We have to exit the Production Mode of the BMC to activate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * Watchdog functionality and the BIOS life sign monitoring.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ret = menf21bmc_wdt_exit_prod_mode(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) dev_err(&client->dev, "failed to leave production mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ret = devm_mfd_add_devices(&client->dev, 0, menf21bmc_cell,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ARRAY_SIZE(menf21bmc_cell), NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) dev_err(&client->dev, "failed to add BMC sub-devices\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static const struct i2c_device_id menf21bmc_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) { "menf21bmc" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) MODULE_DEVICE_TABLE(i2c, menf21bmc_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static struct i2c_driver menf21bmc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .driver.name = "menf21bmc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .id_table = menf21bmc_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .probe = menf21bmc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) module_i2c_driver(menf21bmc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) MODULE_DESCRIPTION("MEN 14F021P00 BMC mfd core driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) MODULE_AUTHOR("Andreas Werner <andreas.werner@men.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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