From patchwork Mon Jan 8 18:56:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jack Doan X-Patchwork-Id: 13513905 Received: from mail-io1-f44.google.com (mail-io1-f44.google.com [209.85.166.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B682254F82 for ; Mon, 8 Jan 2024 18:56:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=jackdoan.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=jackdoan.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=jackdoan-com.20230601.gappssmtp.com header.i=@jackdoan-com.20230601.gappssmtp.com header.b="jSk5V66q" Received: by mail-io1-f44.google.com with SMTP id ca18e2360f4ac-7baa8da5692so96091539f.0 for ; Mon, 08 Jan 2024 10:56:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jackdoan-com.20230601.gappssmtp.com; s=20230601; t=1704740181; x=1705344981; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:from:to:cc:subject:date:message-id:reply-to; bh=a/MfJU5BlW8bTUQ97qYWBNVzT5z6/ZdWZ/HBaWC+cfI=; b=jSk5V66q6CxuIdCqYuxtGDx1cQkUBx8nWpctlkyx7jIuGLH9z8trm6hbBCAyQ4zu5m TdGaGRmy1uAR5mtT7soClwBbvJyi0A8ucnkihFApk5qIWK7pK0dBaRJbqEGgHBE22+sq ZN0Esu5vaJNeF3cKjgRkN87B1yGOz2CJ/h5a3mZEf2VupHQe0Nwx1ohiy6UqyfpExfDg JehRfH06nOWc5rIhNKtNmylsc5mlQTa5itxSaQEvQhMat39rGcRZaXP7l8JrWo96Co3W lFrwy61KrzRbDZlLPQBkcULzaumDLLdOfS4xIOxSbkvBfE0hrV019B9SBDygOkuNu++U G46g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704740181; x=1705344981; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=a/MfJU5BlW8bTUQ97qYWBNVzT5z6/ZdWZ/HBaWC+cfI=; b=fv+pkUREttgNgW3kAHuqdIv/uZ4cJIFPvQ49Hc/xAmxXM5zOrz1iasNksgkHRIZ4T2 u0Q6OLsRo9oJk1ssEN0tmPkB72FvmnAcy+xTdDg7OeOrO5s2n83gHy84KT45QgbhbsOS Ru7LEter3OkcR93O5mbm13AB+B7+ig77EJ4tbS2xQE9d9mSZdzoZdr6ZAlIVjhQZIqOJ LvjZLq7Io7KK7QPRBoEHItsWclpiyJUxrbChjKZQ4LYO4InPPyBy1MWW4/1B/3F05tvP A+WAGm8ClqeoDSkIgsi32VL6BOF2PMxxUGODtYnWhH+Wp8DpVDrBhzocDm9Re+z/d/BI RVQA== X-Gm-Message-State: AOJu0YwvYnIxXvxBSbn3aIP9TYNNZDD+KNDJhDRLYo1RQYcGnn1N5BrJ 2kTjYK48U/oJYi30yYfPviMYUJm0AaaIjg== X-Google-Smtp-Source: AGHT+IHnbQKgysrXzHlVyP3vOtuSZPIb0NjFfB+67BGKt/K7Q8BUnu8A8D5VT1Rz5AydKek38YLneQ== X-Received: by 2002:a6b:4116:0:b0:7bc:422b:a6c9 with SMTP id n22-20020a6b4116000000b007bc422ba6c9mr2722375ioa.31.1704740180712; Mon, 08 Jan 2024 10:56:20 -0800 (PST) Received: from jackdesk.. ([2601:8c0:882:130c:5631:265c:d41f:3be6]) by smtp.gmail.com with ESMTPSA id fr3-20020a056638658300b0046df77733acsm124283jab.102.2024.01.08.10.56.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Jan 2024 10:56:20 -0800 (PST) From: Jack Doan To: jdelvare@suse.com, linux@roeck-us.net, corbet@lwn.net, me@jackdoan.com, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] hwmon: Add MSI PSU HID monitoring driver Date: Mon, 8 Jan 2024 11:56:04 -0700 Message-ID: <20240108185604.2858930-1-me@jackdoan.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver provides a sysfs interface for MSI power supplies with a USB-HID monitoring interface. Measurements for the output voltage and current for each rail are provided, as well as total output power, temperature, and fan control. This patch adds: - hwmon driver msi-psu - hwmon documentation - updates MAINTAINERS Signed-off-by: Jack Doan --- Documentation/hwmon/index.rst | 1 + Documentation/hwmon/msi-psu.rst | 64 +++ MAINTAINERS | 7 + drivers/hwmon/Kconfig | 12 + drivers/hwmon/Makefile | 1 + drivers/hwmon/msi-psu.c | 801 ++++++++++++++++++++++++++++++++ 6 files changed, 886 insertions(+) create mode 100644 Documentation/hwmon/msi-psu.rst create mode 100644 drivers/hwmon/msi-psu.c diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index 72f4e6065bae..34e4bc086bdb 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -159,6 +159,7 @@ Hardware Monitoring Kernel Drivers mp2888 mp2975 mp5023 + msi-psu nct6683 nct6775 nct7802 diff --git a/Documentation/hwmon/msi-psu.rst b/Documentation/hwmon/msi-psu.rst new file mode 100644 index 000000000000..3dda7190a627 --- /dev/null +++ b/Documentation/hwmon/msi-psu.rst @@ -0,0 +1,64 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +Kernel driver msi-psu +========================= + +Supported devices: + +* MSI MEG Ai1300P + +* MSI MEG Ai1000P + +Author: Jack Doan + +Description +----------- + +This driver provides a sysfs interface for MSI PSUs with a HID monitoring +interface. + +Measurements for the output voltage and current for each rail are provided, +as well as total output power, temperature, and fan control. + +Additional properties are available in debugfs, such as an efficiency +measurement, and switching to/from 12V multi-rail mode + +Sysfs entries +------------- + +============ =============================================================== +curr1_input Current on the 12v psu rail +curr2_input Current on the 5v psu rail +curr3_input Current on the 3.3v psu rail +fan1_input RPM of psu fan +in0_input Voltage of the psu ac input +in1_input Voltage of the 12v psu rail +in2_input Voltage of the 5v psu rail +in3_input Voltage of the 3.3v psu rail +power1_input Total power usage +pwm1 PWM value for fan1. Writes to this file will switch set + pwm1_enable to manual control mode. +pwm1_enable PWM mode for fan1. (1) means "auto", and uses the built-in fan + curve. (3) means manual control +temp1_input Temperature of the psu +============ =============================================================== + +Usage Notes +----------- + +It is an USB HID device, so it is auto-detected, supports hot-swapping and +several devices at once. + +Debugfs entries +--------------- + +==================== ======================================================== +multi_rail_enabled Single or multi rail mode of the PCIe power connectors +efficiency An efficiency measurement, expressed as per-ten-thousand + (ex: 8512 == 85.12%) +product Product name of the psu +revision Revision number of the psu +uptime Session uptime of the psu +uptime_total Total uptime of the psu +vendor Vendor name of the psu +==================== ======================================================== diff --git a/MAINTAINERS b/MAINTAINERS index a7c4cf8201e0..246519f9079d 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14632,6 +14632,13 @@ L: platform-driver-x86@vger.kernel.org S: Maintained F: drivers/platform/x86/msi-laptop.c +MSI PSU HARDWARE MONITOR DRIVER +M: Jack Doan +L: linux-hwmon@vger.kernel.org +S: Maintained +F: Documentation/hwmon/msi-psu.rst +F: drivers/hwmon/msi-psu.c + MSI WMI SUPPORT L: platform-driver-x86@vger.kernel.org S: Orphan diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index cf27523eed5a..2870673b56a5 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1248,6 +1248,18 @@ config SENSORS_MLXREG_FAN driver as a module, choose 'M' here: the module will be called mlxreg-fan. +config SENSORS_MSI_PSU + tristate "MSI PSU HID controller" + depends on HID + help + If you say yes here you get support for MSI power supplies with an + HID monitoring interface. + + Currently this driver supports the MEG Ai1300P and MEG Ai1000P PSUs. + + This driver can also be built as a module. If so, the module + will be called msi-psu. + config SENSORS_TC654 tristate "Microchip TC654/TC655 and compatibles" depends on I2C diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index e84bd9685b5c..c08268073ca0 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -156,6 +156,7 @@ obj-$(CONFIG_MAX31827) += max31827.o obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o obj-$(CONFIG_SENSORS_MC34VR500) += mc34vr500.o obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o +obj-$(CONFIG_SENSORS_MSI_PSU) += msi-psu.o obj-$(CONFIG_SENSORS_TC654) += tc654.o obj-$(CONFIG_SENSORS_TPS23861) += tps23861.o obj-$(CONFIG_SENSORS_MLXREG_FAN) += mlxreg-fan.o diff --git a/drivers/hwmon/msi-psu.c b/drivers/hwmon/msi-psu.c new file mode 100644 index 000000000000..30754a5ebbda --- /dev/null +++ b/drivers/hwmon/msi-psu.c @@ -0,0 +1,801 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for MSI power supplies with USB-HID interfaces + * Heavily derived from the corsair-psu and corsair-cpro drivers, + * but different enough to be incompatible + * + * Copyright (C) 2023 Jack Doan + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * MSI protocol for PSUs + * + * message size = 64 bytes (request and response, little endian) + * request: + * [command][register][param0][param1][paramX]... + * reply: + * [echo of command][echo of register][data0][data1][dataX]... + * + * - the driver uses raw events to be accessible from userspace (though this is not really + * supported, it is just there for convenience, may be removed in the future) + * - a successful reply always starts with the address and command in the same order the + * request used it + * - length of the reply data is specific to the command used. + * - The replies to most reads are pmbus linear11 encoded + * - the PSU expects a "handshake" init command before all other commands will work + * - send the handshake by sending 0x51 to the address 0xfa (packet will be [0xfa 0x51]) + * - the driver supports debugfs for values not fitting into the hwmon class + */ + +#define DRIVER_NAME "msi-psu" + +#define REPLY_SIZE 40 /* max length of a reply to a single command */ +#define SAMPLE_INTERVAL_MS 50 +#define CMD_BUFFER_SIZE 64 +#define CMD_TIMEOUT_MS 250 +#define SECONDS_PER_HOUR (60 * 60) +#define SECONDS_PER_DAY (SECONDS_PER_HOUR * 24) + +#define PSU_NAK 0xFE +#define PSU_REG_VEND_STR 0x10 +#define PSU_REG_PROD_STR 0x11 +#define PSU_REG_REVISION 0x12 +#define PSU_REG_SERIAL 0x13 /* accepted, but returns all zeros */ + +#define PSU_REG_IN_VOLTS 0x20 +#define PSU_REG_VOUT_12V_EACH_RAIL 0x22 +#define PSU_REG_IOUT_12V_EACH_RAIL 0x23 +#define PSU_REG_VOUT_12V 0x24 +#define PSU_REG_IOUT_12V 0x25 +#define PSU_REG_VOUT_5V 0x26 +#define PSU_REG_IOUT_5V 0x27 +#define PSU_REG_VOUT_3V 0x28 +#define PSU_REG_IOUT_3V 0x29 +#define PSU_REG_TOTAL_WATTS 0x2A +#define PSU_REG_EFFICIENCY 0x2B +#define PSU_REG_TEMP0 0x30 +#define PSU_REG_FAN_RPM 0x40 +#define PSU_REG_FAN_MODE 0x41 +#define PSU_REG_FAN_DUTY_CYCLE 0x42 + +#define PSU_REG_MULTIRAIL 0xC0 +#define PSU_REG_UNKNOWN_C4 0xC4 +#define PSU_REG_UNKNOWN_C6 0xC6 + +#define PSU_REG_UPTIME 0xD0 +#define PSU_REG_TOTAL_UPTIME 0xD1 + +#define PSU_REG_READ_EVERYTHING 0xE0 +#define PSU_REG_SAVE_SETTINGS 0xF1 + +#define PSU_INIT 0xFA +#define PSU_READ 0x51 +#define PSU_WRITE 0x50 + +#define PSU_MULTI_RAIL_ENABLED 2 +#define PSU_MULTI_RAIL_DISABLED 1 + +#define COMBINED_12V 5 + +#define FAN_MODE_MANUAL 3 +#define FAN_MODE_AUTO 1 +#define FAN_SPEED_MAX 100 +#define FAN_SPEED_MIN 0 + +struct volt_amp_pair { + u16 volts; + u16 amps; +} __packed; + +struct msipsu_all { + struct volt_amp_pair v12[6]; + struct volt_amp_pair v5; + struct volt_amp_pair v3; + u16 watts; + u16 eff; + u16 temp; + u16 fan_speed; +} __packed; + +struct msipsu_data { + struct hid_device *hdev; + struct device *hwmon_dev; + struct dentry *debugfs; + struct completion wait_completion; + struct mutex lock; /* for locking access to cmd_buffer */ + u8 *cmd_buffer; + char vendor[REPLY_SIZE]; + char product[REPLY_SIZE]; + struct debugfs_blob_wrapper vendor_blob; + struct debugfs_blob_wrapper product_blob; + struct msipsu_all data; + ktime_t last_read_all; +}; + +/* some values are SMBus LINEAR11 data which need a conversion */ +static int msipsu_lin11_to_int(u16 v16, int scale, bool is_signed) +{ + s32 exponent; + s32 mantissa; + int val; + + exponent = ((s16)v16) >> 11; + if (is_signed) + mantissa = ((s16)((v16 & 0x7ff) << 5)) >> 5; + else + mantissa = (u16)(v16 & 0x7ff); /* deliberately not sign-extending here */ + val = mantissa * scale; + + if (exponent >= 0) + val <<= exponent; + else + val >>= -exponent; + + return val; +} + +static int msipsu_percent_to_pwm(u16 val) +{ + return DIV_ROUND_CLOSEST(val * 255, 100); +} + +static int msipsu_pwm_to_percent(long val) +{ + if (val < 0 || val > 255) + return -EINVAL; + + return DIV_ROUND_CLOSEST(val * 100, 255); +} + +static int msipsu_usb_cmd(struct msipsu_data *priv, const u8 *in, size_t in_len, void *data) +{ + unsigned long time; + int ret; + + if (in_len > CMD_BUFFER_SIZE) + return -ENOBUFS; + + memset(priv->cmd_buffer, 0, CMD_BUFFER_SIZE); + memcpy(priv->cmd_buffer, in, in_len); + + reinit_completion(&priv->wait_completion); + + ret = hid_hw_output_report(priv->hdev, priv->cmd_buffer, CMD_BUFFER_SIZE); + if (ret < 0) + return ret; + + time = wait_for_completion_timeout(&priv->wait_completion, + msecs_to_jiffies(CMD_TIMEOUT_MS)); + if (!time) + return -ETIMEDOUT; + + /* + * at the start of the reply is an echo of the send command/address in the same order it + * was sent. In the event a command/address is not supported, the PSU will reply with a NAK. + * For an invalid read, it will look like this: + * Out -> [PSU_READ(0x51) A_FAKE_REGISTER(0x69)] + * In <- [PSU_READ(0x51) PSU_NAK(0xFE)] + * Writes differ slightly, this is the sequence for a write to a non-existent register: + * Out -> [PSU_WRITE(0x50) A_FAKE_REGISTER(0x69)] + * In <- [PSU_WRITE(0x50) PSU_NAK(0xFE)] + * And this is a rejected write (of the correct length) to a real register: + * Out -> [PSU_WRITE(0x50) PSU_REG_FAN_MODE(0x41) DATA(0x55 0x55 0x55)] + * In <- [PSU_WRITE(0x50) PSU_REG_FAN_MODE(0x41) PSU_NAK(0xFE)] + */ + if (in[0] != priv->cmd_buffer[0] || in[1] != priv->cmd_buffer[1]) + return -EOPNOTSUPP; + else if (in[2] != PSU_NAK && priv->cmd_buffer[2] == PSU_NAK) + return -EINVAL; + + if (data) + memcpy(data, priv->cmd_buffer + 2, REPLY_SIZE); + + return 0; +} + +static int msipsu_usb_cmd_locked(struct msipsu_data *priv, const u8 *in, size_t in_len, void *data) +{ + int ret; + + mutex_lock(&priv->lock); + ret = msipsu_usb_cmd(priv, in, in_len, data); + mutex_unlock(&priv->lock); + return ret; +} + +static int msipsu_fw_init(struct msipsu_data *priv) +{ + /* + * Vendor SW always begins with a message of [0xfa, 0x51] + * This init message is replied to with the model name of the PSU. + */ + const u8 init[] = {PSU_INIT, 0x51}; + const u8 read_vendor[] = {PSU_READ, PSU_REG_VEND_STR}; + int ret; + + ret = msipsu_usb_cmd(priv, init, sizeof(init), priv->product); + if (ret < 0) + return ret; + ret = msipsu_usb_cmd(priv, read_vendor, sizeof(read_vendor), priv->vendor); + if (ret < 0) + return ret; + priv->vendor_blob.data = priv->vendor; + priv->product_blob.data = priv->product; + priv->vendor_blob.size = strnlen(priv->vendor, sizeof(priv->vendor)); + priv->product_blob.size = strnlen(priv->product, sizeof(priv->product)); + return ret; +} + +static int msipsu_save_settings(struct msipsu_data *priv) +{ + const u8 cmd[] = {PSU_WRITE, PSU_REG_SAVE_SETTINGS, 0x0}; + + return msipsu_usb_cmd_locked(priv, cmd, sizeof(cmd), NULL); +} + +static int msipsu_write_fan_settings(struct msipsu_data *priv, u8 mode, long pwm_duty) +{ + int ret; + int percent_duty = 0; + + if (mode == FAN_MODE_AUTO) { + /* vendor SW masks off the duty cycle for auto-mode, we should do the same */ + percent_duty = FAN_SPEED_MIN; + } else if (pwm_duty != 0) { + /* + * it is an error to write duty to non-zero while the device is not in + * manual-fan-mode, so switch mode automatically + */ + mode = FAN_MODE_MANUAL; + percent_duty = msipsu_pwm_to_percent(pwm_duty); + if (percent_duty < 0) /* return -EINVAL if we got a value we couldn't convert */ + return percent_duty; + } + const u8 cmd[] = {PSU_WRITE, PSU_REG_FAN_MODE, mode, 0, percent_duty}; + + ret = msipsu_usb_cmd_locked(priv, cmd, sizeof(cmd), NULL); + if (ret < 0) + return ret; + return msipsu_save_settings(priv); +} + +static int msipsu_get_all_values(struct msipsu_data *priv) +{ + const u8 read_cmd[] = {PSU_READ, PSU_REG_READ_EVERYTHING}; + ktime_t t = ktime_get(); + s64 delta = ktime_ms_delta(t, priv->last_read_all); + + if (delta < SAMPLE_INTERVAL_MS) + return 0; + + priv->last_read_all = t; + return msipsu_usb_cmd_locked(priv, read_cmd, sizeof(read_cmd), &priv->data); +} + +static int msipsu_get_value(struct msipsu_data *priv, u8 cmd, long *val) +{ + u8 data[REPLY_SIZE]; + const u8 read_cmd[] = {PSU_READ, cmd}; + int ret = msipsu_usb_cmd_locked(priv, read_cmd, sizeof(read_cmd), data); + + if (ret < 0) + return ret; + + u16 tmp16 = (data[1] << 8) + data[0]; + + switch (cmd) { + case PSU_REG_IN_VOLTS: + case PSU_REG_VOUT_12V: + case PSU_REG_IOUT_12V: + case PSU_REG_VOUT_5V: + case PSU_REG_IOUT_5V: + case PSU_REG_VOUT_3V: + case PSU_REG_IOUT_3V: + case PSU_REG_TEMP0: + *val = msipsu_lin11_to_int(tmp16, 1000, true); + break; + case PSU_REG_EFFICIENCY: + *val = msipsu_lin11_to_int(tmp16, 100, true); + break; + case PSU_REG_FAN_RPM: + *val = msipsu_lin11_to_int(tmp16, 1, false); + break; + case PSU_REG_TOTAL_WATTS: + *val = msipsu_lin11_to_int(tmp16, 1000000, true); + break; + case PSU_REG_FAN_MODE: + case PSU_REG_FAN_DUTY_CYCLE: + case PSU_REG_TOTAL_UPTIME: + case PSU_REG_UPTIME: + case PSU_REG_REVISION: + *val = ((long)data[3] << 24) + (data[2] << 16) + tmp16; + break; + case PSU_REG_MULTIRAIL: + switch (data[0]) { + case PSU_MULTI_RAIL_DISABLED: + *val = 0; + break; + case PSU_MULTI_RAIL_ENABLED: + *val = 1; + break; + default: + *val = 0xff; + break; + } + break; + default: + ret = -EOPNOTSUPP; + break; + } + + return ret; +} + +static umode_t msipsu_hwmon_ops_is_visible(const void *data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + if (type == hwmon_temp && (attr == hwmon_temp_input || attr == hwmon_temp_label)) + return 0444; + else if (type == hwmon_fan && (attr == hwmon_fan_input || attr == hwmon_fan_label)) + return 0444; + else if (type == hwmon_pwm && (attr == hwmon_pwm_enable || attr == hwmon_pwm_input)) + return 0644; + else if (type == hwmon_power && (attr == hwmon_power_input || attr == hwmon_power_label)) + return 0444; + else if (type == hwmon_in && (attr == hwmon_in_input || attr == hwmon_in_label)) + return 0444; + else if (type == hwmon_curr && (attr == hwmon_curr_input || attr == hwmon_curr_label)) + return 0444; + + return 0; +} + +static int msipsu_hwmon_ops_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long *val) +{ + struct msipsu_data *priv = dev_get_drvdata(dev); + int ret; + + if (type != hwmon_pwm) { + /* PWM controls don't use the "all" packet, so don't read it */ + ret = msipsu_get_all_values(priv); + if (ret < 0) + return ret; + } + + if (type == hwmon_temp && attr == hwmon_temp_input) { + *val = msipsu_lin11_to_int(priv->data.temp, 1000, true); + } else if (type == hwmon_fan && attr == hwmon_fan_input) { + *val = msipsu_lin11_to_int(priv->data.fan_speed, 1, false); + } else if (type == hwmon_pwm) { + switch (attr) { + case hwmon_pwm_enable: + ret = msipsu_get_value(priv, PSU_REG_FAN_MODE, val); + *val &= 0xff; + break; + case hwmon_pwm_input: + ret = msipsu_get_value(priv, PSU_REG_FAN_DUTY_CYCLE, val); + *val &= 0xff; /* there's a "calculated" DC in the next byte up */ + *val = msipsu_percent_to_pwm(*val); + break; + default: + ret = -EOPNOTSUPP; + break; + } + } else if (type == hwmon_power && attr == hwmon_power_input) { + *val = msipsu_lin11_to_int(priv->data.watts, 1000000, true); + } else if (type == hwmon_in && attr == hwmon_in_input) { + switch (channel) { + case 0: + ret = msipsu_get_value(priv, PSU_REG_IN_VOLTS, val); + break; + case 1: + *val = msipsu_lin11_to_int(priv->data.v12[COMBINED_12V].volts, 1000, true); + break; + case 2: + *val = msipsu_lin11_to_int(priv->data.v5.volts, 1000, true); + break; + case 3: + *val = msipsu_lin11_to_int(priv->data.v3.volts, 1000, true); + break; + default: + return -EOPNOTSUPP; + } + } else if (type == hwmon_curr && attr == hwmon_curr_input) { + switch (channel) { + case 0: + *val = msipsu_lin11_to_int(priv->data.v12[COMBINED_12V].amps, 1000, true); + break; + case 1: + *val = msipsu_lin11_to_int(priv->data.v5.amps, 1000, true); + break; + case 2: + *val = msipsu_lin11_to_int(priv->data.v3.amps, 1000, true); + break; + default: + return -EOPNOTSUPP; + } + } else { + return -EOPNOTSUPP; + } + + if (ret < 0) + return ret; + + return 0; +} + +static int msipsu_hwmon_ops_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, const char **str) +{ + static const char *const label_volts[] = { + "v_in", + "v_out +12v", + "v_out +5v", + "v_out +3.3v" + }; + + static const char *const label_amps[] = { + "curr +12v", + "curr +5v", + "curr +3.3v" + }; + + if (type == hwmon_temp && attr == hwmon_temp_label) { + *str = "psu temp"; + return 0; + } else if (type == hwmon_fan && attr == hwmon_fan_label) { + *str = "psu fan"; + return 0; + } else if (type == hwmon_power && attr == hwmon_power_label) { + *str = "power total"; + return 0; + } else if (type == hwmon_in && attr == hwmon_in_label && channel < 4) { + *str = label_volts[channel]; + return 0; + } else if (type == hwmon_curr && attr == hwmon_curr_label && channel < 3) { + *str = label_amps[channel]; + return 0; + } + + return -EOPNOTSUPP; +} + +static int msipsu_hwmon_ops_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long val) +{ + struct msipsu_data *priv = dev_get_drvdata(dev); + + if (type != hwmon_pwm) + return -EOPNOTSUPP; + + switch (attr) { + case hwmon_pwm_enable: + switch (val) { + case FAN_MODE_AUTO: + return msipsu_write_fan_settings(priv, val, FAN_SPEED_MIN); + case FAN_MODE_MANUAL: + return msipsu_write_fan_settings(priv, val, FAN_SPEED_MAX); + default: + return -EINVAL; + } + case hwmon_pwm_input: + return msipsu_write_fan_settings(priv, FAN_MODE_MANUAL, val); + default: + return -EOPNOTSUPP; + } +} + +static const struct hwmon_ops msipsu_hwmon_ops = { + .is_visible = msipsu_hwmon_ops_is_visible, + .read = msipsu_hwmon_ops_read, + .write = msipsu_hwmon_ops_write, + .read_string = msipsu_hwmon_ops_read_string, +}; + +static const struct hwmon_channel_info *msipsu_info[] = { + HWMON_CHANNEL_INFO(chip, + HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL), + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL), + HWMON_CHANNEL_INFO(pwm, + HWMON_PWM_INPUT | HWMON_PWM_ENABLE), + HWMON_CHANNEL_INFO(power, + HWMON_P_INPUT | HWMON_P_LABEL), + HWMON_CHANNEL_INFO(in, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL, + HWMON_I_INPUT | HWMON_I_LABEL), + HWMON_CHANNEL_INFO(curr, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL, + HWMON_C_INPUT | HWMON_C_LABEL), + NULL +}; + +static const struct hwmon_chip_info msipsu_chip_info = { + .ops = &msipsu_hwmon_ops, + .info = msipsu_info, +}; + +#ifdef CONFIG_DEBUG_FS + +static void print_uptime(struct seq_file *seqf, u8 cmd) +{ + struct msipsu_data *priv = seqf->private; + long val = 0; + int ret = msipsu_get_value(priv, cmd, &val); + + if (ret < 0) { + seq_puts(seqf, "N/A\n"); + return; + } + + if (val > SECONDS_PER_DAY) { + seq_printf(seqf, "%ld day(s), %02ld:%02ld:%02ld\n", val / SECONDS_PER_DAY, + val % SECONDS_PER_DAY / SECONDS_PER_HOUR, val % SECONDS_PER_HOUR / 60, + val % 60); + return; + } + + seq_printf(seqf, "%02ld:%02ld:%02ld\n", val % SECONDS_PER_DAY / SECONDS_PER_HOUR, + val % SECONDS_PER_HOUR / 60, val % 60); +} + +static int uptime_show(struct seq_file *seqf, void *unused) +{ + print_uptime(seqf, PSU_REG_UPTIME); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(uptime); + +static int uptime_total_show(struct seq_file *seqf, void *unused) +{ + print_uptime(seqf, PSU_REG_TOTAL_UPTIME); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(uptime_total); + +static int revision_show(struct seq_file *seqf, void *unused) +{ + struct msipsu_data *priv = seqf->private; + long val = 0; + int ret = msipsu_get_value(priv, PSU_REG_REVISION, &val); + + if (ret < 0) { + seq_puts(seqf, "N/A\n"); + return 0; + } + + seq_printf(seqf, "%c.%c\n", (char)(val & 0xff), (char)((val >> 8) & 0xff)); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(revision); + +static int efficiency_show(struct seq_file *seqf, void *unused) +{ + struct msipsu_data *priv = seqf->private; + int ret = msipsu_get_all_values(priv); + + if (ret < 0) { + seq_puts(seqf, "N/A\n"); + return 0; + } + + seq_printf(seqf, "%d\n", msipsu_lin11_to_int(priv->data.eff, 100, true)); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(efficiency); + +static int multi_rail_read(void *data, u64 *val) +{ + return msipsu_get_value((struct msipsu_data *)data, PSU_REG_MULTIRAIL, (long *)val); +} + +static int msipsu_write_rail_setting(struct msipsu_data *priv, bool multi_enabled) +{ + long currently_enabled; + int ret = msipsu_get_value(priv, PSU_REG_MULTIRAIL, ¤tly_enabled); + + if (ret < 0) + return ret; + + /* hardware returns an error if we try to set the mode to the current mode. Avoid this. */ + if (currently_enabled == multi_enabled) + return 0; + + u8 to_write = multi_enabled ? PSU_MULTI_RAIL_ENABLED : PSU_MULTI_RAIL_DISABLED; + const u8 cmd[] = {PSU_WRITE, PSU_REG_MULTIRAIL, to_write}; + + ret = msipsu_usb_cmd_locked(priv, cmd, sizeof(cmd), NULL); + if (ret < 0) + return ret; + return msipsu_save_settings(priv); +} + +static int multi_rail_write(void *data, u64 val) +{ + struct msipsu_data *priv = data; + + switch (val) { + case 0: + return msipsu_write_rail_setting(priv, false); + case 1: + return msipsu_write_rail_setting(priv, true); + default: + return -EINVAL; + } +} + +DEFINE_SIMPLE_ATTRIBUTE(multi_rail_fops, multi_rail_read, multi_rail_write, "%llu\n"); + +static void msipsu_debugfs_init(struct msipsu_data *priv) +{ + char name[32]; + + scnprintf(name, sizeof(name), "%s-%s", DRIVER_NAME, dev_name(&priv->hdev->dev)); + + priv->debugfs = debugfs_create_dir(name, NULL); + debugfs_create_file("uptime", 0444, priv->debugfs, priv, &uptime_fops); + debugfs_create_file("uptime_total", 0444, priv->debugfs, priv, &uptime_total_fops); + debugfs_create_blob("vendor", 0444, priv->debugfs, &priv->vendor_blob); + debugfs_create_blob("product", 0444, priv->debugfs, &priv->product_blob); + debugfs_create_file("revision", 0444, priv->debugfs, priv, &revision_fops); + debugfs_create_file("efficiency", 0444, priv->debugfs, priv, &efficiency_fops); + debugfs_create_file("multi_rail_enabled", 0644, priv->debugfs, priv, &multi_rail_fops); +} + +#else + +static void msipsu_debugfs_init(struct msipsu_data *priv) +{ +} + +#endif + +static int msipsu_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + struct msipsu_data *priv; + int ret; + + priv = devm_kzalloc(&hdev->dev, sizeof(struct msipsu_data), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->cmd_buffer = devm_kmalloc(&hdev->dev, CMD_BUFFER_SIZE, GFP_KERNEL); + if (!priv->cmd_buffer) + return -ENOMEM; + + ret = hid_parse(hdev); + if (ret) + return ret; + + ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW); + if (ret) + return ret; + + ret = hid_hw_open(hdev); + if (ret) + goto fail_and_stop; + + priv->hdev = hdev; + hid_set_drvdata(hdev, priv); + mutex_init(&priv->lock); + init_completion(&priv->wait_completion); + + hid_device_io_start(hdev); + + ret = msipsu_fw_init(priv); + if (ret < 0) { + dev_err(&hdev->dev, "unable to initialize device (%d)\n", ret); + goto fail_and_close; + } + + priv->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "msipsu", priv, + &msipsu_chip_info, NULL); + + if (IS_ERR(priv->hwmon_dev)) { + ret = PTR_ERR(priv->hwmon_dev); + goto fail_and_close; + } + + msipsu_debugfs_init(priv); + + return 0; + +fail_and_close: + hid_hw_close(hdev); +fail_and_stop: + hid_hw_stop(hdev); + return ret; +} + +static void msipsu_remove(struct hid_device *hdev) +{ + struct msipsu_data *priv = hid_get_drvdata(hdev); + + debugfs_remove_recursive(priv->debugfs); + hwmon_device_unregister(priv->hwmon_dev); + hid_hw_close(hdev); + hid_hw_stop(hdev); +} + +static int msipsu_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) +{ + struct msipsu_data *priv = hid_get_drvdata(hdev); + + if (completion_done(&priv->wait_completion)) + return 0; + + memcpy(priv->cmd_buffer, data, min(CMD_BUFFER_SIZE, size)); + complete(&priv->wait_completion); + + return 0; +} + +#ifdef CONFIG_PM +static int msipsu_resume(struct hid_device *hdev) +{ + struct msipsu_data *priv = hid_get_drvdata(hdev); + + /* some PSUs turn off the microcontroller during standby, so a reinit is required */ + return msipsu_fw_init(priv); +} +#endif + +static const struct hid_device_id msipsu_idtable[] = { + { HID_USB_DEVICE(0xdb0, 0x56d4) }, /* MEG Ai1300P */ + { HID_USB_DEVICE(0xdb0, 0xe749) }, /* MEG Ai1000P */ + { }, +}; +MODULE_DEVICE_TABLE(hid, msipsu_idtable); + +static struct hid_driver msipsu_driver = { + .name = DRIVER_NAME, + .id_table = msipsu_idtable, + .probe = msipsu_probe, + .remove = msipsu_remove, + .raw_event = msipsu_raw_event, +#ifdef CONFIG_PM + .resume = msipsu_resume, + .reset_resume = msipsu_resume, +#endif +}; + +static int __init msipsu_init(void) +{ + return hid_register_driver(&msipsu_driver); +} + +static void __exit msipsu_exit(void) +{ + hid_unregister_driver(&msipsu_driver); +} + +/* + * With module_init() the driver would load before the HID bus when + * built-in, so use late_initcall() instead. + */ +late_initcall(msipsu_init); +module_exit(msipsu_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Jack Doan "); +MODULE_DESCRIPTION("Driver for MSI power supplies with HID sensor interface");