[PATCH V7] hwmon: add fan/pwm driver for corsair h100i platinum

jaap aarts
2020-08-22T10:47:42Z

Adds fan/pwm support for H100i platinum.
Custom temp/fan curves are not supported.

v7:
- redo memory management with regards to device setup. (no more use after
free, double frees, fixed sizeof)
- add myself to MAINTAINERS
- add documentation for this driver

Signed-off-by: Jaap Aarts <jaap.aarts1@gmail.com>
---
Documentation/hwmon/corsair_hydro_i_pro.rst | 54 ++
MAINTAINERS | 6 +
drivers/hwmon/Kconfig | 7 +
drivers/hwmon/Makefile | 1 +
drivers/hwmon/corsair_hydro_i_pro.c | 719 ++++++++++++++++++++
5 files changed, 787 insertions(+)
create mode 100644 Documentation/hwmon/corsair_hydro_i_pro.rst
create mode 100644 drivers/hwmon/corsair_hydro_i_pro.c

diff --git a/Documentation/hwmon/corsair_hydro_i_pro.rst b/Documentation/hwmon/corsair_hydro_i_pro.rst
new file mode 100644
index 000000000000..17d90d1b8e33
--- /dev/null
+++ b/Documentation/hwmon/corsair_hydro_i_pro.rst
@@ -0,0 +1,54 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver corsair_hydro_i_pro
+==========================
+
+Supported devices:
+
+ * Corsair H100i pro
+
+Author: Jaap Aarts
+
+Description
+-----------
+
+This driver implements the hwmon interface for the corsair H100i pro.
+Suppor for more All In One liquid coolers(AIOs) from this product range
+should be supported, only testing and a new config should be required.
+These AIOs can be controlled via USB, with control over fans, pumps, RGB
+lighting, and temperature sensors.
+Currently only fans are supported, but no custom fan curves are supported.
+There is always one pump and 1-3 fans.
+
+The H100i pro configuration:
+fans: 2
+minrpm: 200,
+maxrpm: 3000,
+maxpwm 100,
+device name: "corsair_H100i_pro",
+
+Usage Notes
+-----------
+
+Since it is a USB device, hotswapping is possible. The device is autodetected.
+
+Sysfs entries
+-------------
+
+======================= =====================================================================
+fan[1-2]_input Connected fan rpm.
+fan[1-2]_target Sets fan speed target rpm, when writing and if fan_mode is not
+ set to one returns -EINVAL.
+ When reading, it reports the last value if it was set by the driver.
+ When the mode is not set to 1 (manual) read value will be 0.
+ Otherwise returns an error.
+fan[1-2]_min Reports the minimum rpm value. for the H100i pro this is 200
+fan[1-2]_max Reports the maximum rpm value. for the H100i pro this is 3000
+
+pwm[1-2] Sets the fan speed. Values from 0-100, when writing and if
+ fan_mode is not set to one returns -EINVAL.
+pwm[1-2]_enable Set the mode for the fan.
+ 0: no fan speed control (i.e. default fan profile)
+ 1: manual fan control
+ 2: default fan profile
+======================= =====================================================================
diff --git a/MAINTAINERS b/MAINTAINERS
index f0068bceeb61..0e7553a0e2e5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4461,6 +4461,12 @@ L: linux-hwmon@vger.kernel.org
S: Maintained
F: drivers/hwmon/corsair-cpro.c

+CORSAIR-HYDRO-I-PRO HARDWARE MONITOR DRIVER
+M: Jaap Aarts <jaap.aarts1>@gmail.com>
+L: linux-hwmon@vger.kernel.org
+S: Maintained
+F: drivers/hwmon/corsair_hydro_i_pro.c
+
COSA/SRP SYNC SERIAL DRIVER
M: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
S: Maintained
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 8dc28b26916e..9a721659313f 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -378,6 +378,13 @@ config SENSORS_ARM_SCPI
and power sensors available on ARM Ltd's SCP based platforms. The
actual number and type of sensors exported depend on the platform.

+config SENSORS_CORSAIR_HYDRO_I_PRO
+ tristate "Corsair hydro HXXXi pro driver"
+ depends on USB
+ help
+ If you say yes here you get support for the corsair hydro HXXXi pro
+ range of devices.
+
config SENSORS_ASB100
tristate "Asus ASB100 Bach"
depends on X86 && I2C
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index a8f4b35b136b..3bad054054fe 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_SENSORS_W83793) += w83793.o
obj-$(CONFIG_SENSORS_W83795) += w83795.o
obj-$(CONFIG_SENSORS_W83781D) += w83781d.o
obj-$(CONFIG_SENSORS_W83791D) += w83791d.o
+obj-$(CONFIG_SENSORS_CORSAIR_HYDRO_I_PRO) += corsair_hydro_i_pro.o

obj-$(CONFIG_SENSORS_AB8500) += abx500.o ab8500.o
obj-$(CONFIG_SENSORS_ABITUGURU) += abituguru.o
diff --git a/drivers/hwmon/corsair_hydro_i_pro.c b/drivers/hwmon/corsair_hydro_i_pro.c
new file mode 100644
index 000000000000..42869f32a7bd
--- /dev/null
+++ b/drivers/hwmon/corsair_hydro_i_pro.c
@@ -0,0 +1,719 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * A hwmon driver for all corsair hyxro HXXXi pro all-in-one liquid coolers.
+ * Copyright (c) Jaap Aarts 2020
+ *
+ * Protocol partially reverse engineered by audiohacked
+ * https://github.com/audiohacked/OpendriverLink
+ */
+
+/*
+ * Supports following liquid coolers:
+ * H100i platinum
+ *
+ * Other products should work with this driver with slight modification.
+ *
+ * Note: platinum is the codename name for pro within the driver, so H100i platinum = H100i pro.
+ * But some products are actually called platinum, these are not intended to be supported (yet).
+ *
+ * Note: fan curve control has not been implemented
+ */
+
+#include <linux/errno.h>
+#include <linux/hwmon.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+struct device_config {
+ const u16 vendor_id;
+ const u16 product_id;
+ const u8 fancount;
+ const u16 rpm_min;
+ const u16 rpm_max;
+ const u8 pwm_max;
+ const char *name;
+ const struct hwmon_channel_info **hwmon_info;
+};
+
+struct hydro_i_pro_device {
+ struct usb_device *udev;
+
+ const struct device_config *config;
+
+ unsigned char *bulk_out_buffer;
+ unsigned char *bulk_in_buffer;
+ size_t bulk_out_size;
+ size_t bulk_in_size;
+ char bulk_in_endpointAddr;
+ char bulk_out_endpointAddr;
+
+ struct usb_interface *interface; /* the interface for this device */
+ struct mutex io_mutex;
+};
+
+#define MAX_FAN_COUNT 2
+#define MAX_PWM_CHANNEL_COUNT MAX_FAN_COUNT
+
+struct hwmon_data {
+ struct hydro_i_pro_device *hdev;
+ u8 channel_count;
+ void *channel_data[MAX_PWM_CHANNEL_COUNT];
+};
+
+struct curve_point {
+ u8 temp;
+ u8 pwm;
+};
+
+#define FAN_CURVE_COUNT 7
+
+struct hwmon_fan_data {
+ u8 fan_channel;
+ u16 fan_target;
+ u8 fan_pwm_target;
+ u8 mode;
+ struct curve_point curve[FAN_CURVE_COUNT];
+};
+
+static struct curve_point quiet_curve[FAN_CURVE_COUNT] = {
+ {
+ .temp = 0x1F,
+ .pwm = 0x15,
+ },
+ {
+ .temp = 0x21,
+ .pwm = 0x1E,
+ },
+ {
+ .temp = 0x24,
+ .pwm = 0x25,
+ },
+ {
+ .temp = 0x27,
+ .pwm = 0x2D,
+ },
+ {
+ .temp = 0x29,
+ .pwm = 0x38,
+ },
+ {
+ .temp = 0x2C,
+ .pwm = 0x4A,
+ },
+ {
+ .temp = 0x2F,
+ .pwm = 0x64,
+ },
+};
+
+#define DEFAULT_CURVE quiet_curve
+
+static const struct hwmon_channel_info *dual_fan[] = {
+ HWMON_CHANNEL_INFO(
+ fan, HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_MIN | HWMON_F_MAX,
+ HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_MIN | HWMON_F_MAX),
+ HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
+ HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
+ NULL
+};
+
+static const struct device_config config_table[] = {
+ {
+ .fancount = 2,
+ .rpm_min = 200,
+ .rpm_max = 3000,
+ .pwm_max = 100,
+ .name = "corsair_H100i_pro",
+ .hwmon_info = dual_fan,
+ },
+};
+
+#define BULK_TIMEOUT 100
+
+enum opcodes {
+ PWM_FAN_CURVE_CMD = 0x40,
+ PWM_GET_CURRENT_CMD = 0x41,
+ PWM_FAN_TARGET_CMD = 0x42,
+ RPM_FAN_TARGET_CMD = 0x43,
+};
+
+#define SUCCES_LENGTH 3
+#define SUCCES_CODE 0x12, 0x34
+
+static bool check_succes(enum opcodes command, char ret[static SUCCES_LENGTH])
+{
+ char success[SUCCES_LENGTH] = { command, SUCCES_CODE };
+
+ return memcmp(ret, success, SUCCES_LENGTH) == 0;
+}
+
+static int acquire_lock(struct hydro_i_pro_device *hdev)
+{
+ int retval = usb_autopm_get_interface(hdev->interface);
+
+ if (retval)
+ return retval;
+
+ return mutex_lock_interruptible(&hdev->io_mutex);
+}
+
+static int transfer_usb(struct hydro_i_pro_device *hdev,
+ unsigned char *send_buf, unsigned char *recv_buf,
+ int send_len, int recv_len)
+{
+ int retval;
+ int wrote;
+ int sndpipe = usb_sndbulkpipe(hdev->udev, hdev->bulk_out_endpointAddr);
+ int rcvpipe = usb_rcvbulkpipe(hdev->udev, hdev->bulk_in_endpointAddr);
+
+ retval = usb_bulk_msg(hdev->udev, sndpipe, send_buf, send_len, &wrote,
+ BULK_TIMEOUT);
+ if (retval)
+ return retval;
+ if (wrote != send_len)
+ return -EIO;
+
+ retval = usb_bulk_msg(hdev->udev, rcvpipe, recv_buf, recv_len, &wrote,
+ BULK_TIMEOUT);
+ if (retval)
+ return retval;
+ if (wrote != recv_len)
+ return -EIO;
+
+ return 0;
+}
+
+static int set_fan_pwm_curve(struct hydro_i_pro_device *hdev,
+ struct hwmon_fan_data *fan_data,
+ struct curve_point point[static FAN_CURVE_COUNT])
+{
+ int retval;
+ unsigned char *send_buf = hdev->bulk_out_buffer;
+ unsigned char *recv_buf = hdev->bulk_in_buffer;
+
+ send_buf[0] = PWM_FAN_CURVE_CMD;
+ send_buf[1] = fan_data->fan_channel;
+ send_buf[2] = point[0].temp;
+ send_buf[3] = point[1].temp;
+ send_buf[4] = point[2].temp;
+ send_buf[5] = point[3].temp;
+ send_buf[6] = point[4].temp;
+ send_buf[7] = point[5].temp;
+ send_buf[8] = point[6].temp;
+ send_buf[9] = point[0].pwm;
+ send_buf[10] = point[1].pwm;
+ send_buf[11] = point[2].pwm;
+ send_buf[12] = point[3].pwm;
+ send_buf[13] = point[4].pwm;
+ send_buf[14] = point[5].pwm;
+ send_buf[15] = point[6].pwm;
+
+ retval = transfer_usb(hdev, send_buf, recv_buf, 16, 3);
+ if (retval)
+ return retval;
+
+ if (!check_succes(send_buf[0], recv_buf)) {
+ dev_warn(
+ &hdev->udev->dev,
+ "failed setting fan pwm/temp curve for %s on channel %d %d,%d,%d\n",
+ hdev->config->name, fan_data->fan_channel, recv_buf[0],
+ recv_buf[1], recv_buf[2]);
+ return -EINVAL;
+ }
+
+ memcpy(fan_data->curve, point, sizeof(fan_data->curve));
+
+ return 0;
+}
+
+static int set_fan_target_rpm(struct hydro_i_pro_device *hdev,
+ struct hwmon_fan_data *fan_data, u16 val)
+{
+ int retval;
+ unsigned char *send_buf = hdev->bulk_out_buffer;
+ unsigned char *recv_buf = hdev->bulk_in_buffer;
+
+ send_buf[0] = RPM_FAN_TARGET_CMD;
+ send_buf[1] = fan_data->fan_channel;
+ send_buf[2] = (val >> 8);
+ send_buf[3] = val;
+
+ retval = transfer_usb(hdev, send_buf, recv_buf, 4, 3);
+ if (retval)
+ return retval;
+
+ if (!check_succes(send_buf[0], recv_buf)) {
+ dev_warn(
+ &hdev->udev->dev,
+ "failed setting fan rpm for %s on channel %d %d,%d,%d\n",
+ hdev->config->name, fan_data->fan_channel, recv_buf[0],
+ recv_buf[1], recv_buf[2]);
+ return -EINVAL;
+ }
+ fan_data->fan_target = val;
+ fan_data->fan_pwm_target = 0;
+
+ return 0;
+}
+
+static int get_fan_current_rpm(struct hydro_i_pro_device *hdev,
+ struct hwmon_fan_data *fan_data, long *val)
+{
+ int retval;
+ unsigned char *send_buf = hdev->bulk_out_buffer;
+ unsigned char *recv_buf = hdev->bulk_in_buffer;
+
+ send_buf[0] = PWM_GET_CURRENT_CMD;
+ send_buf[1] = fan_data->fan_channel;
+
+ retval = transfer_usb(hdev, send_buf, recv_buf, 2, 6);
+ if (retval)
+ return retval;
+
+ if (!check_succes(send_buf[0], recv_buf) ||
+ recv_buf[3] != fan_data->fan_channel) {
+ dev_warn(
+ &hdev->udev->dev,
+ "failed retrieving fan pwm for %s on channel %d %d,%d,%d/%d\n",
+ hdev->config->name, fan_data->fan_channel, recv_buf[0],
+ recv_buf[1], recv_buf[2], recv_buf[3]);
+ return -EINVAL;
+ }
+
+ *val = ((recv_buf[4]) << 8) + recv_buf[5];
+ return 0;
+}
+
+static int set_fan_target_pwm(struct hydro_i_pro_device *hdev,
+ struct hwmon_fan_data *fan_data, u8 val)
+{
+ int retval;
+ unsigned char *send_buf = hdev->bulk_out_buffer;
+ unsigned char *recv_buf = hdev->bulk_in_buffer;
+
+ send_buf[0] = PWM_FAN_TARGET_CMD;
+ send_buf[1] = fan_data->fan_channel;
+ send_buf[2] = val;
+
+ retval = transfer_usb(hdev, send_buf, recv_buf, 3, 3);
+ if (retval)
+ return retval;
+
+ if (!check_succes(send_buf[0], recv_buf)) {
+ dev_warn(
+ &hdev->udev->dev,
+ "failed setting fan pwm for %s on channel %d %d,%d,%d\n",
+ hdev->config->name, fan_data->fan_channel, recv_buf[0],
+ recv_buf[1], recv_buf[2]);
+ return -EINVAL;
+ }
+ fan_data->fan_target = 0;
+ fan_data->fan_pwm_target = val;
+
+ return 0;
+}
+
+static umode_t hwmon_is_visible(const void *d, enum hwmon_sensor_types type,
+ u32 attr, int channel)
+{
+ switch (type) {
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ return 0444;
+ case hwmon_fan_target:
+ return 0644;
+ case hwmon_fan_min:
+ return 0444;
+ case hwmon_fan_max:
+ return 0444;
+ default:
+ break;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_input:
+ return 0200;
+ case hwmon_pwm_enable:
+ return 0644;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+static int hwmon_write(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long val)
+{
+ struct hwmon_data *data = dev_get_drvdata(dev);
+ struct hydro_i_pro_device *hdev = data->hdev;
+ struct hwmon_fan_data *fan_data;
+ int retval = 0;
+
+ switch (type) {
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_target:
+ fan_data = data->channel_data[channel];
+ if (fan_data->mode != 1)
+ return -EINVAL;
+
+ val = clamp_val(val, hdev->config->rpm_min,
+ hdev->config->rpm_max);
+
+ retval = acquire_lock(hdev);
+ if (retval)
+ goto exit;
+
+ retval = set_fan_target_rpm(hdev, fan_data, val);
+ if (retval)
+ goto cleanup;
+
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_input:
+ fan_data = data->channel_data[channel];
+ if (fan_data->mode != 1)
+ return -EINVAL;
+
+ val = clamp_val(val, 0, hdev->config->pwm_max);
+ retval = acquire_lock(hdev);
+ if (retval)
+ goto exit;
+
+ retval = set_fan_target_pwm(hdev, fan_data, val);
+ if (retval)
+ goto cleanup;
+
+ break;
+ case hwmon_pwm_enable:
+ fan_data = data->channel_data[channel];
+
+ switch (val) {
+ case 2:
+ case 0:
+ retval = acquire_lock(hdev);
+ if (retval)
+ goto exit;
+
+ retval = set_fan_pwm_curve(hdev, fan_data,
+ DEFAULT_CURVE);
+ if (retval)
+ goto cleanup;
+ fan_data->mode = val;
+ break;
+ case 1:
+ retval = acquire_lock(hdev);
+ if (retval)
+ goto exit;
+
+ if (fan_data->fan_target != 0) {
+ retval = set_fan_target_rpm(
+ hdev, fan_data,
+ fan_data->fan_target);
+ if (retval)
+ goto cleanup;
+ } else if (fan_data->fan_pwm_target != 0) {
+ retval = set_fan_target_pwm(
+ hdev, fan_data,
+ fan_data->fan_pwm_target);
+ if (retval)
+ goto cleanup;
+ }
+ fan_data->mode = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+cleanup:
+ mutex_unlock(&hdev->io_mutex);
+ usb_autopm_put_interface(hdev->interface);
+exit:
+ return retval;
+}
+
+static int hwmon_read(struct device *dev, enum hwmon_sensor_types type,
+ u32 attr, int channel, long *val)
+{
+ struct hwmon_data *data = dev_get_drvdata(dev);
+ struct hydro_i_pro_device *hdev = data->hdev;
+ struct hwmon_fan_data *fan_data;
+ int retval = 0;
+
+ switch (type) {
+ case hwmon_fan:
+ switch (attr) {
+ case hwmon_fan_input:
+ fan_data = data->channel_data[channel];
+
+ retval = acquire_lock(hdev);
+ if (retval)
+ goto exit;
+
+ retval = get_fan_current_rpm(hdev, fan_data, val);
+ break;
+ case hwmon_fan_target:
+ fan_data = data->channel_data[channel];
+ if (fan_data->mode != 1) {
+ *val = 0;
+ goto exit;
+ }
+ *val = fan_data->fan_target;
+ goto exit;
+ case hwmon_fan_min:
+ *val = hdev->config->rpm_min;
+ goto exit;
+ case hwmon_fan_max:
+ *val = hdev->config->rpm_max;
+ goto exit;
+
+ default:
+ return -EINVAL;
+ }
+ break;
+ case hwmon_pwm:
+ switch (attr) {
+ case hwmon_pwm_enable:
+ fan_data = data->channel_data[channel];
+ *val = fan_data->mode;
+ goto exit;
+ default:
+ return -EINVAL;
+ }
+ goto exit;
+
+ default:
+ return -EINVAL;
+ }
+
+ mutex_unlock(&hdev->io_mutex);
+ usb_autopm_put_interface(hdev->interface);
+exit:
+ return retval;
+}
+
+static const struct hwmon_ops i_pro_ops = {
+ .is_visible = hwmon_is_visible,
+ .read = hwmon_read,
+ .write = hwmon_write,
+};
+
+static int hwmon_init(struct hydro_i_pro_device *hdev)
+{
+ u8 fan_id;
+ struct device *hwmon_dev;
+ struct hwmon_fan_data *fan;
+ struct hwmon_data *data;
+ struct hwmon_chip_info *hwmon_info;
+
+ data = devm_kzalloc(&hdev->udev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+ hwmon_info =
+ devm_kzalloc(&hdev->udev->dev, sizeof(*hwmon_info), GFP_KERNEL);
+ if (!hwmon_info) {
+ devm_kfree(&hdev->udev->dev, data);
+ return -ENOMEM;
+ }
+
+ /* You did something bad!! Either adjust MAX_FAN_COUNT or the fancount for the config!*/
+ WARN_ON(hdev->config->fancount >= MAX_PWM_CHANNEL_COUNT);
+ data->channel_count =
+ clamp_val(hdev->config->fancount, 0, MAX_PWM_CHANNEL_COUNT);
+
+ /* For each fan create a data channel a fan config entry and a pwm config entry */
+ for (fan_id = 0; fan_id < data->channel_count; fan_id++) {
+ fan = devm_kzalloc(&hdev->udev->dev, sizeof(fan), GFP_KERNEL);
+ if (!fan)
+ return -ENOMEM;
+
+ fan->fan_channel = fan_id;
+ fan->mode = 0;
+ data->channel_data[fan_id] = fan;
+ }
+
+ hwmon_info->ops = &i_pro_ops;
+ hwmon_info->info = hdev->config->hwmon_info;
+
+ data->hdev = hdev;
+ hwmon_dev = devm_hwmon_device_register_with_info(
+ &hdev->udev->dev, hdev->config->name, data, hwmon_info, NULL);
+ if (IS_ERR(hwmon_dev))
+ return PTR_ERR(hwmon_dev);
+
+ dev_info(&hdev->udev->dev, "setup hwmon for %s\n", hdev->config->name);
+ return 0;
+}
+
+#define USB_VENDOR_ID_CORSAIR 0x1b1c
+#define USB_PRODUCT_ID_H100I_PRO 0x0c15
+/*
+ * Devices that work with this driver.
+ * More devices should work, however none have been tested.
+ */
+static const struct usb_device_id astk_table[] = {
+ { USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_PRODUCT_ID_H100I_PRO),
+ .driver_info = (kernel_ulong_t)&config_table[0] },
+ {},
+};
+
+MODULE_DEVICE_TABLE(usb, astk_table);
+
+static int init_device(struct usb_device *udev)
+{
+ int retval;
+
+ /*
+ * This is needed because when running windows in a vm with proprietary driver
+ * and you switch to this driver, the device will not respond unless you run this.
+ */
+ retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x40,
+ 0xffff, 0x0000, 0, 0, 0);
+
+ /*this always returns error, but it required for propper initialisation*/
+ if (retval != -EPIPE)
+ return retval;
+
+ return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x02, 0x40,
+ 0x0002, 0x0000, 0, 0, 0);
+}
+
+static int deinit_device(struct usb_device *udev)
+{
+ return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x02, 0x40,
+ 0x0004, 0x0000, 0, 0, 0);
+}
+
+static void astk_delete(struct hydro_i_pro_device *hdev)
+{
+ usb_put_intf(hdev->interface);
+ mutex_destroy(&hdev->io_mutex);
+ usb_put_dev(hdev->udev);
+}
+
+static int astk_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
+ struct hydro_i_pro_device *hdev;
+ int retval;
+ struct usb_endpoint_descriptor *bulk_in, *bulk_out;
+
+ hdev = devm_kzalloc(&udev->dev, sizeof(*hdev), GFP_KERNEL);
+
+ if (!hdev) {
+ retval = -ENOMEM;
+ goto exit;
+ }
+
+ hdev->config = (const struct device_config *)id->driver_info;
+ /* You should set the driver_info to a pointer to the correct configuration!!*/
+ WARN_ON(!hdev->config);
+
+ hdev->udev = udev;
+ hdev->interface = usb_get_intf(interface);
+ mutex_init(&hdev->io_mutex);
+
+ retval = usb_find_common_endpoints(interface->cur_altsetting, &bulk_in,
+ &bulk_out, NULL, NULL);
+ if (retval) {
+ astk_delete(hdev);
+ goto exit;
+ }
+
+ /*
+ * set up the endpoint information
+ * use only the first bulk-in and bulk-out endpoints
+ */
+ hdev->bulk_in_size = usb_endpoint_maxp(bulk_in);
+ hdev->bulk_in_buffer =
+ devm_kzalloc(&hdev->udev->dev, hdev->bulk_in_size, GFP_KERNEL);
+ hdev->bulk_in_endpointAddr = bulk_in->bEndpointAddress;
+ if (!hdev->bulk_in_buffer) {
+ astk_delete(hdev);
+ goto exit;
+ }
+
+ hdev->bulk_out_size = usb_endpoint_maxp(bulk_out);
+ hdev->bulk_out_buffer =
+ devm_kzalloc(&hdev->udev->dev, hdev->bulk_out_size, GFP_KERNEL);
+ hdev->bulk_out_endpointAddr = bulk_out->bEndpointAddress;
+ if (!hdev->bulk_out_buffer) {
+ astk_delete(hdev);
+ goto exit;
+ }
+
+ retval = init_device(hdev->udev);
+ if (retval) {
+ astk_delete(hdev);
+ goto exit;
+ }
+
+ retval = hwmon_init(hdev);
+ if (retval) {
+ astk_delete(hdev);
+ goto exit;
+ }
+
+ usb_set_intfdata(interface, hdev);
+exit:
+ return retval;
+}
+
+static void astk_disconnect(struct usb_interface *interface)
+{
+ struct hydro_i_pro_device *hdev = usb_get_intfdata(interface);
+
+ dev_info(&hdev->udev->dev, "removed hwmon for %s\n",
+ hdev->config->name);
+ deinit_device(hdev->udev);
+ usb_set_intfdata(interface, NULL);
+ astk_delete(hdev);
+}
+
+static int astk_resume(struct usb_interface *intf)
+{
+ return 0;
+}
+
+static int astk_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ return 0;
+}
+
+static struct usb_driver hydro_i_pro_driver = {
+ .name = "hydro_i_pro_device",
+ .id_table = astk_table,
+ .probe = astk_probe,
+ .disconnect = astk_disconnect,
+ .resume = astk_resume,
+ .suspend = astk_suspend,
+ .supports_autosuspend = 1,
+};
+
+module_usb_driver(hydro_i_pro_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaap Aarts <jaap.aarts1@gmail.com>");
+MODULE_DESCRIPTION("Corsair HXXXi pro device driver");
--
2.28.0