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linux/drivers/hwmon/corsair-psu.c
Wilken Gottwalt c2d5f273c5 hwmon: (corsair-psu) add support for critical values 
Adds support for reading the critical values of the temperature sensors
and the rail sensors (voltage and current) once and caches them. Updates
the naming of the constants following a more clear scheme. Also updates
the documentation and fixes some typos. Updates is_visible and ops_read
functions to be more readable.

The new sensors output of a Corsair HX850i will look like this:
corsairpsu-hid-3-1
Adapter: HID adapter
v_in:        230.00 V
v_out +12v:   12.14 V  (crit min =  +8.41 V, crit max = +15.59 V)
v_out +5v:     5.03 V  (crit min =  +3.50 V, crit max =  +6.50 V)
v_out +3.3v:   3.30 V  (crit min =  +2.31 V, crit max =  +4.30 V)
psu fan:        0 RPM
vrm temp:     +46.2°C  (crit = +70.0°C)
case temp:    +39.8°C  (crit = +70.0°C)
power total: 152.00 W
power +12v:  108.00 W
power +5v:    41.00 W
power +3.3v:   5.00 W
curr +12v:     9.00 A  (crit max = +85.00 A)
curr +5v:      8.31 A  (crit max = +40.00 A)
curr +3.3v:    1.62 A  (crit max = +40.00 A)

Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Link: https://lore.kernel.org/r/YFNg6vGk3sQmyqgB@monster.powergraphx.local
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2021-04-20 06:50:14 -07:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* corsair-psu.c - Linux driver for Corsair power supplies with HID sensors interface
* Copyright (C) 2020 Wilken Gottwalt <wilken.gottwalt@posteo.net>
*/
#include <linux/completion.h>
#include <linux/debugfs.h>
#include <linux/errno.h>
#include <linux/hid.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/types.h>
/*
* Corsair protocol for PSUs
*
* message size = 64 bytes (request and response, little endian)
* request:
* [length][command][param0][param1][paramX]...
* reply:
* [echo of length][echo of command][data0][data1][dataX]...
*
* - commands are byte sized opcodes
* - length is the sum of all bytes of the commands/params
* - the micro-controller of most of these PSUs support concatenation in the request and reply,
* but it is better to not rely on this (it is also hard to parse)
* - 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 reply always start with the length and command in the same order the request used it
* - length of the reply data is specific to the command used
* - some of the commands work on a rail and can be switched to a specific rail (0 = 12v,
* 1 = 5v, 2 = 3.3v)
* - the format of the init command 0xFE is swapped length/command bytes
* - parameter bytes amount and values are specific to the command (rail setting is the only
* for now that uses non-zero values)
* - there are much more commands, especially for configuring the device, but they are not
* supported because a wrong command/length can lockup the micro-controller
* - the driver supports debugfs for values not fitting into the hwmon class
* - not every device class (HXi, RMi or AXi) supports all commands
* - it is a pure sensors reading driver (will not support configuring)
*/
#define DRIVER_NAME "corsair-psu"
#define REPLY_SIZE 16 /* max length of a reply to a single command */
#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 RAIL_COUNT 3 /* 3v3 + 5v + 12v */
#define TEMP_COUNT 2
#define PSU_CMD_SELECT_RAIL 0x00 /* expects length 2 */
#define PSU_CMD_RAIL_VOLTS_HCRIT 0x40 /* the rest of the commands expect length 3 */
#define PSU_CMD_RAIL_VOLTS_LCRIT 0x44
#define PSU_CMD_RAIL_AMPS_HCRIT 0x46
#define PSU_CMD_TEMP_HCRIT 0x4F
#define PSU_CMD_IN_VOLTS 0x88
#define PSU_CMD_IN_AMPS 0x89
#define PSU_CMD_RAIL_VOLTS 0x8B
#define PSU_CMD_RAIL_AMPS 0x8C
#define PSU_CMD_TEMP0 0x8D
#define PSU_CMD_TEMP1 0x8E
#define PSU_CMD_FAN 0x90
#define PSU_CMD_RAIL_WATTS 0x96
#define PSU_CMD_VEND_STR 0x99
#define PSU_CMD_PROD_STR 0x9A
#define PSU_CMD_TOTAL_WATTS 0xEE
#define PSU_CMD_TOTAL_UPTIME 0xD1
#define PSU_CMD_UPTIME 0xD2
#define PSU_CMD_INIT 0xFE
#define L_IN_VOLTS "v_in"
#define L_OUT_VOLTS_12V "v_out +12v"
#define L_OUT_VOLTS_5V "v_out +5v"
#define L_OUT_VOLTS_3_3V "v_out +3.3v"
#define L_IN_AMPS "curr in"
#define L_AMPS_12V "curr +12v"
#define L_AMPS_5V "curr +5v"
#define L_AMPS_3_3V "curr +3.3v"
#define L_FAN "psu fan"
#define L_TEMP0 "vrm temp"
#define L_TEMP1 "case temp"
#define L_WATTS "power total"
#define L_WATTS_12V "power +12v"
#define L_WATTS_5V "power +5v"
#define L_WATTS_3_3V "power +3.3v"
static const char *const label_watts[] = {
L_WATTS,
L_WATTS_12V,
L_WATTS_5V,
L_WATTS_3_3V
};
static const char *const label_volts[] = {
L_IN_VOLTS,
L_OUT_VOLTS_12V,
L_OUT_VOLTS_5V,
L_OUT_VOLTS_3_3V
};
static const char *const label_amps[] = {
L_IN_AMPS,
L_AMPS_12V,
L_AMPS_5V,
L_AMPS_3_3V
};
struct corsairpsu_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];
long temp_crit[TEMP_COUNT];
long in_crit[RAIL_COUNT];
long in_lcrit[RAIL_COUNT];
long curr_crit[RAIL_COUNT];
u8 temp_crit_support;
u8 in_crit_support;
u8 in_lcrit_support;
u8 curr_crit_support;
bool in_curr_cmd_support; /* not all commands are supported on every PSU */
};
/* some values are SMBus LINEAR11 data which need a conversion */
static int corsairpsu_linear11_to_int(const u16 val, const int scale)
{
const int exp = ((s16)val) >> 11;
const int mant = (((s16)(val & 0x7ff)) << 5) >> 5;
const int result = mant * scale;
return (exp >= 0) ? (result << exp) : (result >> -exp);
}
static int corsairpsu_usb_cmd(struct corsairpsu_data *priv, u8 p0, u8 p1, u8 p2, void *data)
{
unsigned long time;
int ret;
memset(priv->cmd_buffer, 0, CMD_BUFFER_SIZE);
priv->cmd_buffer[0] = p0;
priv->cmd_buffer[1] = p1;
priv->cmd_buffer[2] = p2;
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/length in the same order it
* was send, not every command is supported on every device class, if a command is not
* supported, the length value in the reply is okay, but the command value is set to 0
*/
if (p0 != priv->cmd_buffer[0] || p1 != priv->cmd_buffer[1])
return -EOPNOTSUPP;
if (data)
memcpy(data, priv->cmd_buffer + 2, REPLY_SIZE);
return 0;
}
static int corsairpsu_init(struct corsairpsu_data *priv)
{
/*
* PSU_CMD_INIT uses swapped length/command and expects 2 parameter bytes, this command
* actually generates a reply, but we don't need it
*/
return corsairpsu_usb_cmd(priv, PSU_CMD_INIT, 3, 0, NULL);
}
static int corsairpsu_fwinfo(struct corsairpsu_data *priv)
{
int ret;
ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_VEND_STR, 0, priv->vendor);
if (ret < 0)
return ret;
ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_PROD_STR, 0, priv->product);
if (ret < 0)
return ret;
return 0;
}
static int corsairpsu_request(struct corsairpsu_data *priv, u8 cmd, u8 rail, void *data)
{
int ret;
mutex_lock(&priv->lock);
switch (cmd) {
case PSU_CMD_RAIL_VOLTS_HCRIT:
case PSU_CMD_RAIL_VOLTS_LCRIT:
case PSU_CMD_RAIL_AMPS_HCRIT:
case PSU_CMD_RAIL_VOLTS:
case PSU_CMD_RAIL_AMPS:
case PSU_CMD_RAIL_WATTS:
ret = corsairpsu_usb_cmd(priv, 2, PSU_CMD_SELECT_RAIL, rail, NULL);
if (ret < 0)
goto cmd_fail;
break;
default:
break;
}
ret = corsairpsu_usb_cmd(priv, 3, cmd, 0, data);
cmd_fail:
mutex_unlock(&priv->lock);
return ret;
}
static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, long *val)
{
u8 data[REPLY_SIZE];
long tmp;
int ret;
ret = corsairpsu_request(priv, cmd, rail, data);
if (ret < 0)
return ret;
/*
* the biggest value here comes from the uptime command and to exceed MAXINT total uptime
* needs to be about 68 years, the rest are u16 values and the biggest value coming out of
* the LINEAR11 conversion are the watts values which are about 1200 for the strongest psu
* supported (HX1200i)
*/
tmp = ((long)data[3] << 24) + (data[2] << 16) + (data[1] << 8) + data[0];
switch (cmd) {
case PSU_CMD_RAIL_VOLTS_HCRIT:
case PSU_CMD_RAIL_VOLTS_LCRIT:
case PSU_CMD_RAIL_AMPS_HCRIT:
case PSU_CMD_TEMP_HCRIT:
case PSU_CMD_IN_VOLTS:
case PSU_CMD_IN_AMPS:
case PSU_CMD_RAIL_VOLTS:
case PSU_CMD_RAIL_AMPS:
case PSU_CMD_TEMP0:
case PSU_CMD_TEMP1:
*val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000);
break;
case PSU_CMD_FAN:
*val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1);
break;
case PSU_CMD_RAIL_WATTS:
case PSU_CMD_TOTAL_WATTS:
*val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000000);
break;
case PSU_CMD_TOTAL_UPTIME:
case PSU_CMD_UPTIME:
*val = tmp;
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static void corsairpsu_get_criticals(struct corsairpsu_data *priv)
{
long tmp;
int rail;
for (rail = 0; rail < TEMP_COUNT; ++rail) {
if (!corsairpsu_get_value(priv, PSU_CMD_TEMP_HCRIT, rail, &tmp)) {
priv->temp_crit_support |= BIT(rail);
priv->temp_crit[rail] = tmp;
}
}
for (rail = 0; rail < RAIL_COUNT; ++rail) {
if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_HCRIT, rail, &tmp)) {
priv->in_crit_support |= BIT(rail);
priv->in_crit[rail] = tmp;
}
if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_LCRIT, rail, &tmp)) {
priv->in_lcrit_support |= BIT(rail);
priv->in_lcrit[rail] = tmp;
}
if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS_HCRIT, rail, &tmp)) {
priv->curr_crit_support |= BIT(rail);
priv->curr_crit[rail] = tmp;
}
}
}
static void corsairpsu_check_cmd_support(struct corsairpsu_data *priv)
{
long tmp;
priv->in_curr_cmd_support = !corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, &tmp);
}
static umode_t corsairpsu_hwmon_temp_is_visible(const struct corsairpsu_data *priv, u32 attr,
int channel)
{
umode_t res = 0444;
switch (attr) {
case hwmon_temp_input:
case hwmon_temp_label:
case hwmon_temp_crit:
if (channel > 0 && !(priv->temp_crit_support & BIT(channel - 1)))
res = 0;
break;
default:
break;
}
return res;
}
static umode_t corsairpsu_hwmon_fan_is_visible(const struct corsairpsu_data *priv, u32 attr,
int channel)
{
switch (attr) {
case hwmon_fan_input:
case hwmon_fan_label:
return 0444;
default:
return 0;
}
}
static umode_t corsairpsu_hwmon_power_is_visible(const struct corsairpsu_data *priv, u32 attr,
int channel)
{
switch (attr) {
case hwmon_power_input:
case hwmon_power_label:
return 0444;
default:
return 0;
};
}
static umode_t corsairpsu_hwmon_in_is_visible(const struct corsairpsu_data *priv, u32 attr,
int channel)
{
umode_t res = 0444;
switch (attr) {
case hwmon_in_input:
case hwmon_in_label:
case hwmon_in_crit:
if (channel > 0 && !(priv->in_crit_support & BIT(channel - 1)))
res = 0;
break;
case hwmon_in_lcrit:
if (channel > 0 && !(priv->in_lcrit_support & BIT(channel - 1)))
res = 0;
break;
default:
break;
};
return res;
}
static umode_t corsairpsu_hwmon_curr_is_visible(const struct corsairpsu_data *priv, u32 attr,
int channel)
{
umode_t res = 0444;
switch (attr) {
case hwmon_curr_input:
if (channel == 0 && !priv->in_curr_cmd_support)
res = 0;
break;
case hwmon_curr_label:
case hwmon_curr_crit:
if (channel > 0 && !(priv->curr_crit_support & BIT(channel - 1)))
res = 0;
break;
default:
break;
}
return res;
}
static umode_t corsairpsu_hwmon_ops_is_visible(const void *data, enum hwmon_sensor_types type,
u32 attr, int channel)
{
const struct corsairpsu_data *priv = data;
switch (type) {
case hwmon_temp:
return corsairpsu_hwmon_temp_is_visible(priv, attr, channel);
case hwmon_fan:
return corsairpsu_hwmon_fan_is_visible(priv, attr, channel);
case hwmon_power:
return corsairpsu_hwmon_power_is_visible(priv, attr, channel);
case hwmon_in:
return corsairpsu_hwmon_in_is_visible(priv, attr, channel);
case hwmon_curr:
return corsairpsu_hwmon_curr_is_visible(priv, attr, channel);
default:
return 0;
}
}
static int corsairpsu_hwmon_temp_read(struct corsairpsu_data *priv, u32 attr, int channel,
long *val)
{
int err = -EOPNOTSUPP;
switch (attr) {
case hwmon_temp_input:
return corsairpsu_get_value(priv, channel ? PSU_CMD_TEMP1 : PSU_CMD_TEMP0,
channel, val);
case hwmon_temp_crit:
*val = priv->temp_crit[channel];
err = 0;
break;
default:
break;
}
return err;
}
static int corsairpsu_hwmon_power_read(struct corsairpsu_data *priv, u32 attr, int channel,
long *val)
{
if (attr == hwmon_power_input) {
switch (channel) {
case 0:
return corsairpsu_get_value(priv, PSU_CMD_TOTAL_WATTS, 0, val);
case 1 ... 3:
return corsairpsu_get_value(priv, PSU_CMD_RAIL_WATTS, channel - 1, val);
default:
break;
}
}
return -EOPNOTSUPP;
}
static int corsairpsu_hwmon_in_read(struct corsairpsu_data *priv, u32 attr, int channel, long *val)
{
int err = -EOPNOTSUPP;
switch (attr) {
case hwmon_in_input:
switch (channel) {
case 0:
return corsairpsu_get_value(priv, PSU_CMD_IN_VOLTS, 0, val);
case 1 ... 3:
return corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS, channel - 1, val);
default:
break;
}
break;
case hwmon_in_crit:
*val = priv->in_crit[channel - 1];
err = 0;
break;
case hwmon_in_lcrit:
*val = priv->in_lcrit[channel - 1];
err = 0;
break;
}
return err;
}
static int corsairpsu_hwmon_curr_read(struct corsairpsu_data *priv, u32 attr, int channel,
long *val)
{
int err = -EOPNOTSUPP;
switch (attr) {
case hwmon_curr_input:
switch (channel) {
case 0:
return corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, val);
case 1 ... 3:
return corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS, channel - 1, val);
default:
break;
}
break;
case hwmon_curr_crit:
*val = priv->curr_crit[channel - 1];
err = 0;
break;
default:
break;
}
return err;
}
static int corsairpsu_hwmon_ops_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
int channel, long *val)
{
struct corsairpsu_data *priv = dev_get_drvdata(dev);
switch (type) {
case hwmon_temp:
return corsairpsu_hwmon_temp_read(priv, attr, channel, val);
case hwmon_fan:
if (attr == hwmon_fan_input)
return corsairpsu_get_value(priv, PSU_CMD_FAN, 0, val);
return -EOPNOTSUPP;
case hwmon_power:
return corsairpsu_hwmon_power_read(priv, attr, channel, val);
case hwmon_in:
return corsairpsu_hwmon_in_read(priv, attr, channel, val);
case hwmon_curr:
return corsairpsu_hwmon_curr_read(priv, attr, channel, val);
default:
return -EOPNOTSUPP;
}
}
static int corsairpsu_hwmon_ops_read_string(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, const char **str)
{
if (type == hwmon_temp && attr == hwmon_temp_label) {
*str = channel ? L_TEMP1 : L_TEMP0;
return 0;
} else if (type == hwmon_fan && attr == hwmon_fan_label) {
*str = L_FAN;
return 0;
} else if (type == hwmon_power && attr == hwmon_power_label && channel < 4) {
*str = label_watts[channel];
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 < 4) {
*str = label_amps[channel];
return 0;
}
return -EOPNOTSUPP;
}
static const struct hwmon_ops corsairpsu_hwmon_ops = {
.is_visible = corsairpsu_hwmon_ops_is_visible,
.read = corsairpsu_hwmon_ops_read,
.read_string = corsairpsu_hwmon_ops_read_string,
};
static const struct hwmon_channel_info *corsairpsu_info[] = {
HWMON_CHANNEL_INFO(chip,
HWMON_C_REGISTER_TZ),
HWMON_CHANNEL_INFO(temp,
HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT),
HWMON_CHANNEL_INFO(fan,
HWMON_F_INPUT | HWMON_F_LABEL),
HWMON_CHANNEL_INFO(power,
HWMON_P_INPUT | HWMON_P_LABEL,
HWMON_P_INPUT | HWMON_P_LABEL,
HWMON_P_INPUT | HWMON_P_LABEL,
HWMON_P_INPUT | HWMON_P_LABEL),
HWMON_CHANNEL_INFO(in,
HWMON_I_INPUT | HWMON_I_LABEL,
HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT,
HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT,
HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT),
HWMON_CHANNEL_INFO(curr,
HWMON_C_INPUT | HWMON_C_LABEL,
HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT,
HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT,
HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT),
NULL
};
static const struct hwmon_chip_info corsairpsu_chip_info = {
.ops = &corsairpsu_hwmon_ops,
.info = corsairpsu_info,
};
#ifdef CONFIG_DEBUG_FS
static void print_uptime(struct seq_file *seqf, u8 cmd)
{
struct corsairpsu_data *priv = seqf->private;
long val;
int ret;
ret = corsairpsu_get_value(priv, cmd, 0, &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_CMD_UPTIME);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(uptime);
static int uptime_total_show(struct seq_file *seqf, void *unused)
{
print_uptime(seqf, PSU_CMD_TOTAL_UPTIME);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(uptime_total);
static int vendor_show(struct seq_file *seqf, void *unused)
{
struct corsairpsu_data *priv = seqf->private;
seq_printf(seqf, "%s\n", priv->vendor);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(vendor);
static int product_show(struct seq_file *seqf, void *unused)
{
struct corsairpsu_data *priv = seqf->private;
seq_printf(seqf, "%s\n", priv->product);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(product);
static void corsairpsu_debugfs_init(struct corsairpsu_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_file("vendor", 0444, priv->debugfs, priv, &vendor_fops);
debugfs_create_file("product", 0444, priv->debugfs, priv, &product_fops);
}
#else
static void corsairpsu_debugfs_init(struct corsairpsu_data *priv)
{
}
#endif
static int corsairpsu_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
struct corsairpsu_data *priv;
int ret;
priv = devm_kzalloc(&hdev->dev, sizeof(struct corsairpsu_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 = corsairpsu_init(priv);
if (ret < 0) {
dev_err(&hdev->dev, "unable to initialize device (%d)\n", ret);
goto fail_and_stop;
}
ret = corsairpsu_fwinfo(priv);
if (ret < 0) {
dev_err(&hdev->dev, "unable to query firmware (%d)\n", ret);
goto fail_and_stop;
}
corsairpsu_get_criticals(priv);
corsairpsu_check_cmd_support(priv);
priv->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsairpsu", priv,
&corsairpsu_chip_info, 0);
if (IS_ERR(priv->hwmon_dev)) {
ret = PTR_ERR(priv->hwmon_dev);
goto fail_and_close;
}
corsairpsu_debugfs_init(priv);
return 0;
fail_and_close:
hid_hw_close(hdev);
fail_and_stop:
hid_hw_stop(hdev);
return ret;
}
static void corsairpsu_remove(struct hid_device *hdev)
{
struct corsairpsu_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 corsairpsu_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data,
int size)
{
struct corsairpsu_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;
}
static const struct hid_device_id corsairpsu_idtable[] = {
{ HID_USB_DEVICE(0x1b1c, 0x1c03) }, /* Corsair HX550i */
{ HID_USB_DEVICE(0x1b1c, 0x1c04) }, /* Corsair HX650i */
{ HID_USB_DEVICE(0x1b1c, 0x1c05) }, /* Corsair HX750i */
{ HID_USB_DEVICE(0x1b1c, 0x1c06) }, /* Corsair HX850i */
{ HID_USB_DEVICE(0x1b1c, 0x1c07) }, /* Corsair HX1000i */
{ HID_USB_DEVICE(0x1b1c, 0x1c08) }, /* Corsair HX1200i */
{ HID_USB_DEVICE(0x1b1c, 0x1c09) }, /* Corsair RM550i */
{ HID_USB_DEVICE(0x1b1c, 0x1c0a) }, /* Corsair RM650i */
{ HID_USB_DEVICE(0x1b1c, 0x1c0b) }, /* Corsair RM750i */
{ HID_USB_DEVICE(0x1b1c, 0x1c0c) }, /* Corsair RM850i */
{ HID_USB_DEVICE(0x1b1c, 0x1c0d) }, /* Corsair RM1000i */
{ },
};
MODULE_DEVICE_TABLE(hid, corsairpsu_idtable);
static struct hid_driver corsairpsu_driver = {
.name = DRIVER_NAME,
.id_table = corsairpsu_idtable,
.probe = corsairpsu_probe,
.remove = corsairpsu_remove,
.raw_event = corsairpsu_raw_event,
};
module_hid_driver(corsairpsu_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Wilken Gottwalt <wilken.gottwalt@posteo.net>");
MODULE_DESCRIPTION("Linux driver for Corsair power supplies with HID sensors interface");
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