// SPDX-License-Identifier: GPL-2.0-or-later /* * corsair-cpro.c - Linux driver for Corsair Commander Pro * Copyright (C) 2020 Marius Zachmann <[email protected]> * * This driver uses hid reports to communicate with the device to allow hidraw userspace drivers * still being used. The device does not use report ids. When using hidraw and this driver * simultaniously, reports could be switched. */ #include <linux/bitops.h> #include <linux/completion.h> #include <linux/debugfs.h> #include <linux/hid.h> #include <linux/hwmon.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/types.h> #define USB_VENDOR_ID_CORSAIR … #define USB_PRODUCT_ID_CORSAIR_COMMANDERPRO … #define USB_PRODUCT_ID_CORSAIR_1000D … #define OUT_BUFFER_SIZE … #define IN_BUFFER_SIZE … #define LABEL_LENGTH … #define REQ_TIMEOUT … #define CTL_GET_FW_VER … #define CTL_GET_BL_VER … #define CTL_GET_TMP_CNCT … #define CTL_GET_TMP … #define CTL_GET_VOLT … #define CTL_GET_FAN_CNCT … #define CTL_GET_FAN_RPM … #define CTL_GET_FAN_PWM … #define CTL_SET_FAN_FPWM … #define CTL_SET_FAN_TARGET … #define NUM_FANS … #define NUM_TEMP_SENSORS … struct ccp_device { … }; /* converts response error in buffer to errno */ static int ccp_get_errno(struct ccp_device *ccp) { … } /* send command, check for error in response, response in ccp->buffer */ static int send_usb_cmd(struct ccp_device *ccp, u8 command, u8 byte1, u8 byte2, u8 byte3) { … } static int ccp_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) { … } /* requests and returns single data values depending on channel */ static int get_data(struct ccp_device *ccp, int command, int channel, bool two_byte_data) { … } static int set_pwm(struct ccp_device *ccp, int channel, long val) { … } static int set_target(struct ccp_device *ccp, int channel, long val) { … } static int ccp_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, const char **str) { … } static int ccp_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { struct ccp_device *ccp = dev_get_drvdata(dev); int ret; switch (type) { case hwmon_temp: switch (attr) { case hwmon_temp_input: ret = get_data(ccp, CTL_GET_TMP, channel, true); if (ret < 0) return ret; *val = ret * 10; return 0; default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_input: ret = get_data(ccp, CTL_GET_FAN_RPM, channel, true); if (ret < 0) return ret; *val = ret; return 0; case hwmon_fan_target: /* how to read target values from the device is unknown */ /* driver returns last set value or 0 */ if (ccp->target[channel] < 0) return -ENODATA; *val = ccp->target[channel]; return 0; default: break; } break; case hwmon_pwm: switch (attr) { case hwmon_pwm_input: ret = get_data(ccp, CTL_GET_FAN_PWM, channel, false); if (ret < 0) return ret; *val = DIV_ROUND_CLOSEST(ret * 255, 100); return 0; default: break; } break; case hwmon_in: switch (attr) { case hwmon_in_input: ret = get_data(ccp, CTL_GET_VOLT, channel, true); if (ret < 0) return ret; *val = ret; return 0; default: break; } break; default: break; } return -EOPNOTSUPP; }; static int ccp_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { struct ccp_device *ccp = dev_get_drvdata(dev); switch (type) { case hwmon_pwm: switch (attr) { case hwmon_pwm_input: return set_pwm(ccp, channel, val); default: break; } break; case hwmon_fan: switch (attr) { case hwmon_fan_target: return set_target(ccp, channel, val); default: break; } break; default: break; } return -EOPNOTSUPP; }; static umode_t ccp_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { const struct ccp_device *ccp = data; switch (type) { case hwmon_temp: if (!test_bit(channel, ccp->temp_cnct)) break; switch (attr) { case hwmon_temp_input: return 0444; case hwmon_temp_label: return 0444; default: break; } break; case hwmon_fan: if (!test_bit(channel, ccp->fan_cnct)) break; switch (attr) { case hwmon_fan_input: return 0444; case hwmon_fan_label: return 0444; case hwmon_fan_target: return 0644; default: break; } break; case hwmon_pwm: if (!test_bit(channel, ccp->fan_cnct)) break; switch (attr) { case hwmon_pwm_input: return 0644; default: break; } break; case hwmon_in: switch (attr) { case hwmon_in_input: return 0444; default: break; } break; default: break; } return 0; }; static const struct hwmon_ops ccp_hwmon_ops = …; static const struct hwmon_channel_info * const ccp_info[] = …; static const struct hwmon_chip_info ccp_chip_info = …; /* read fan connection status and set labels */ static int get_fan_cnct(struct ccp_device *ccp) { … } /* read temp sensor connection status */ static int get_temp_cnct(struct ccp_device *ccp) { … } /* read firmware version */ static int get_fw_version(struct ccp_device *ccp) { … } /* read bootloader version */ static int get_bl_version(struct ccp_device *ccp) { … } static int firmware_show(struct seq_file *seqf, void *unused) { … } DEFINE_SHOW_ATTRIBUTE(…); static int bootloader_show(struct seq_file *seqf, void *unused) { … } DEFINE_SHOW_ATTRIBUTE(…); static void ccp_debugfs_init(struct ccp_device *ccp) { … } static int ccp_probe(struct hid_device *hdev, const struct hid_device_id *id) { … } static void ccp_remove(struct hid_device *hdev) { … } static const struct hid_device_id ccp_devices[] = …; static struct hid_driver ccp_driver = …; MODULE_DEVICE_TABLE(hid, ccp_devices); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; static int __init ccp_init(void) { … } static void __exit ccp_exit(void) { … } /* * When compiling this driver as built-in, hwmon initcalls will get called before the * hid driver and this driver would fail to register. late_initcall solves this. */ late_initcall(ccp_init); module_exit(ccp_exit);
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