Also updates the documentation and comments accordingly. Fixes several
typos and updates the coding style to be more uniform.
Signed-off-by: Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>
---
Documentation/hwmon/corsair-psu.rst | 6 +-
drivers/hwmon/corsair-psu.c | 85 ++++++++++++++++++++++++-----
2 files changed, 76 insertions(+), 15 deletions(-)
diff --git a/Documentation/hwmon/corsair-psu.rst b/Documentation/hwmon/corsair-psu.rst
index c389bd21f4f2..953850213889 100644
--- a/Documentation/hwmon/corsair-psu.rst
+++ b/Documentation/hwmon/corsair-psu.rst
@@ -15,11 +15,11 @@ Supported devices:
Corsair HX850i
- Corsair HX1000i (revision 1 and 2)
+ Corsair HX1000i (Series 2022 and Series 2023)
Corsair HX1200i
- Corsair HX1500i
+ Corsair HX1500i (Series 2022)
Corsair RM550i
@@ -69,6 +69,8 @@ power1_input Total power usage
power2_input Power usage of the 12v psu rail
power3_input Power usage of the 5v psu rail
power4_input Power usage of the 3.3v psu rail
+pwm PWM value, read only
+pwm_enable PWM mode, read only
temp1_input Temperature of the psu vrm component
temp1_crit Temperature max cirtical value of the psu vrm component
temp2_input Temperature of the psu case
diff --git a/drivers/hwmon/corsair-psu.c b/drivers/hwmon/corsair-psu.c
index dc24c566d08b..9e3e3c0a3bdd 100644
--- a/drivers/hwmon/corsair-psu.c
+++ b/drivers/hwmon/corsair-psu.c
@@ -32,18 +32,17 @@
* 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
+ * - a reply always starts 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
+ * one for now that uses non-zero values)
* - 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)
+ * - not every device class (HXi or RMi) supports all commands
+ * - if configured wrong the PSU resets or shuts down, often before actually hitting the
+ * - reported critical temperature
*/
#define DRIVER_NAME "corsair-psu"
@@ -58,7 +57,8 @@
#define OCP_MULTI_RAIL 0x02
#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_FAN_PWM 0x3B /* the rest of the commands expect length 3 */
+#define PSU_CMD_RAIL_VOLTS_HCRIT 0x40
#define PSU_CMD_RAIL_VOLTS_LCRIT 0x44
#define PSU_CMD_RAIL_AMPS_HCRIT 0x46
#define PSU_CMD_TEMP_HCRIT 0x4F
@@ -76,6 +76,7 @@
#define PSU_CMD_UPTIME 0xD2
#define PSU_CMD_OCPMODE 0xD8
#define PSU_CMD_TOTAL_WATTS 0xEE
+#define PSU_CMD_FAN_PWM_ENABLE 0xF0
#define PSU_CMD_INIT 0xFE
#define L_IN_VOLTS "v_in"
@@ -145,6 +146,14 @@ static int corsairpsu_linear11_to_int(const u16 val, const int scale)
return (exp >= 0) ? (result << exp) : (result >> -exp);
}
+/* the micro-controller uses percentage values to control pwm */
+static int corsairpsu_dutycycle_to_pwm(const long dutycycle)
+{
+ const int result = (256 << 16) / 100;
+
+ return (result * dutycycle) >> 16;
+}
+
static int corsairpsu_usb_cmd(struct corsairpsu_data *priv, u8 p0, u8 p1, u8 p2, void *data)
{
unsigned long time;
@@ -244,8 +253,8 @@ static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, l
/*
* 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)
+ * the LINEAR11 conversion are the watts values which are about 1500 for the strongest psu
+ * supported (HX1500i)
*/
tmp = ((long)data[3] << 24) + (data[2] << 16) + (data[1] << 8) + data[0];
switch (cmd) {
@@ -264,6 +273,24 @@ static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, l
case PSU_CMD_FAN:
*val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1);
break;
+ case PSU_CMD_FAN_PWM_ENABLE:
+ *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1);
+ /*
+ * 0 = automatic mode, means the micro-controller controls the fan using a plan
+ * which can be modified, but changing this plan is not supported by this
+ * driver, the matching PWM mode is automatic fan speed control = PWM 2
+ * 1 = fixed mode, fan runs at a fixed speed represented by a percentage
+ * value 0-100, this matches the PWM manual fan speed control = PWM 1
+ * technically there is no PWM no fan speed control mode, it would be a combination
+ * of 1 at 100%
+ */
+ if (*val == 0)
+ *val = 2;
+ break;
+ case PSU_CMD_FAN_PWM:
+ *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1);
+ *val = corsairpsu_dutycycle_to_pwm(*val);
+ break;
case PSU_CMD_RAIL_WATTS:
case PSU_CMD_TOTAL_WATTS:
*val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000000);
@@ -349,6 +376,18 @@ static umode_t corsairpsu_hwmon_fan_is_visible(const struct corsairpsu_data *pri
}
}
+static umode_t corsairpsu_hwmon_pwm_is_visible(const struct corsairpsu_data *priv, u32 attr,
+ int channel)
+{
+ switch (attr) {
+ case hwmon_pwm_input:
+ case hwmon_pwm_enable:
+ return 0444;
+ default:
+ return 0;
+ }
+}
+
static umode_t corsairpsu_hwmon_power_is_visible(const struct corsairpsu_data *priv, u32 attr,
int channel)
{
@@ -416,6 +455,8 @@ static umode_t corsairpsu_hwmon_ops_is_visible(const void *data, enum hwmon_sens
return corsairpsu_hwmon_temp_is_visible(priv, attr, channel);
case hwmon_fan:
return corsairpsu_hwmon_fan_is_visible(priv, attr, channel);
+ case hwmon_pwm:
+ return corsairpsu_hwmon_pwm_is_visible(priv, attr, channel);
case hwmon_power:
return corsairpsu_hwmon_power_is_visible(priv, attr, channel);
case hwmon_in:
@@ -447,6 +488,20 @@ static int corsairpsu_hwmon_temp_read(struct corsairpsu_data *priv, u32 attr, in
return err;
}
+static int corsairpsu_hwmon_pwm_read(struct corsairpsu_data *priv, u32 attr, int channel, long *val)
+{
+ switch (attr) {
+ case hwmon_pwm_input:
+ return corsairpsu_get_value(priv, PSU_CMD_FAN_PWM, 0, val);
+ case hwmon_pwm_enable:
+ return corsairpsu_get_value(priv, PSU_CMD_FAN_PWM_ENABLE, 0, val);
+ default:
+ break;
+ }
+
+ return -EOPNOTSUPP;
+}
+
static int corsairpsu_hwmon_power_read(struct corsairpsu_data *priv, u32 attr, int channel,
long *val)
{
@@ -531,6 +586,8 @@ static int corsairpsu_hwmon_ops_read(struct device *dev, enum hwmon_sensor_types
if (attr == hwmon_fan_input)
return corsairpsu_get_value(priv, PSU_CMD_FAN, 0, val);
return -EOPNOTSUPP;
+ case hwmon_pwm:
+ return corsairpsu_hwmon_pwm_read(priv, attr, channel, val);
case hwmon_power:
return corsairpsu_hwmon_power_read(priv, attr, channel, val);
case hwmon_in:
@@ -571,7 +628,7 @@ static const struct hwmon_ops corsairpsu_hwmon_ops = {
.read_string = corsairpsu_hwmon_ops_read_string,
};
-static const struct hwmon_channel_info * const corsairpsu_info[] = {
+static const struct hwmon_channel_info *const corsairpsu_info[] = {
HWMON_CHANNEL_INFO(chip,
HWMON_C_REGISTER_TZ),
HWMON_CHANNEL_INFO(temp,
@@ -579,6 +636,8 @@ static const struct hwmon_channel_info * const corsairpsu_info[] = {
HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT),
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_P_INPUT | HWMON_P_LABEL,
@@ -813,15 +872,15 @@ static const struct hid_device_id corsairpsu_idtable[] = {
{ 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 revision 1 */
+ { HID_USB_DEVICE(0x1b1c, 0x1c07) }, /* Corsair HX1000i Series 2022 */
{ 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 */
- { HID_USB_DEVICE(0x1b1c, 0x1c1e) }, /* Corsair HX1000i revision 2 */
- { HID_USB_DEVICE(0x1b1c, 0x1c1f) }, /* Corsair HX1500i */
+ { HID_USB_DEVICE(0x1b1c, 0x1c1e) }, /* Corsair HX1000i Series 2023 */
+ { HID_USB_DEVICE(0x1b1c, 0x1c1f) }, /* Corsair HX1500i Series 2022 */
{ },
};
MODULE_DEVICE_TABLE(hid, corsairpsu_idtable);
--
2.41.0
