// SPDX-License-Identifier: GPL-2.0-or-later /* * APM X-Gene SoC Hardware Monitoring Driver * * Copyright (c) 2016, Applied Micro Circuits Corporation * Author: Loc Ho <[email protected]> * Hoan Tran <[email protected]> * * This driver provides the following features: * - Retrieve CPU total power (uW) * - Retrieve IO total power (uW) * - Retrieve SoC temperature (milli-degree C) and alarm */ #include <linux/acpi.h> #include <linux/dma-mapping.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/io.h> #include <linux/interrupt.h> #include <linux/kfifo.h> #include <linux/mailbox_controller.h> #include <linux/mailbox_client.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <acpi/pcc.h> /* SLIMpro message defines */ #define MSG_TYPE_DBG … #define MSG_TYPE_ERR … #define MSG_TYPE_PWRMGMT … #define MSG_TYPE(v) … #define MSG_TYPE_SET(v) … #define MSG_SUBTYPE(v) … #define MSG_SUBTYPE_SET(v) … #define DBG_SUBTYPE_SENSOR_READ … #define SENSOR_RD_MSG … #define SENSOR_RD_EN_ADDR(a) … #define PMD_PWR_REG … #define PMD_PWR_MW_REG … #define SOC_PWR_REG … #define SOC_PWR_MW_REG … #define SOC_TEMP_REG … #define TEMP_NEGATIVE_BIT … #define SENSOR_INVALID_DATA … #define PWRMGMT_SUBTYPE_TPC … #define TPC_ALARM … #define TPC_GET_ALARM … #define TPC_CMD(v) … #define TPC_CMD_SET(v) … #define TPC_EN_MSG(hndl, cmd, type) … /* * Arbitrary retries in case the remote processor is slow to respond * to PCC commands */ #define PCC_NUM_RETRIES … #define ASYNC_MSG_FIFO_SIZE … #define MBOX_OP_TIMEOUTMS … #define WATT_TO_mWATT(x) … #define mWATT_TO_uWATT(x) … #define CELSIUS_TO_mCELSIUS(x) … #define to_xgene_hwmon_dev(cl) … enum xgene_hwmon_version { … }; struct slimpro_resp_msg { … } __packed; struct xgene_hwmon_dev { … }; /* * This function tests and clears a bitmask then returns its old value */ static u16 xgene_word_tst_and_clr(u16 *addr, u16 mask) { … } static int xgene_hwmon_pcc_rd(struct xgene_hwmon_dev *ctx, u32 *msg) { … } static int xgene_hwmon_rd(struct xgene_hwmon_dev *ctx, u32 *msg) { … } static int xgene_hwmon_reg_map_rd(struct xgene_hwmon_dev *ctx, u32 addr, u32 *data) { … } static int xgene_hwmon_get_notification_msg(struct xgene_hwmon_dev *ctx, u32 *amsg) { … } static int xgene_hwmon_get_cpu_pwr(struct xgene_hwmon_dev *ctx, u32 *val) { … } static int xgene_hwmon_get_io_pwr(struct xgene_hwmon_dev *ctx, u32 *val) { … } static int xgene_hwmon_get_temp(struct xgene_hwmon_dev *ctx, u32 *val) { … } /* * Sensor temperature/power functions */ static ssize_t temp1_input_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t temp1_label_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t temp1_critical_alarm_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t power1_label_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t power2_label_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t power1_input_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t power2_input_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(temp1_label); static DEVICE_ATTR_RO(temp1_input); static DEVICE_ATTR_RO(temp1_critical_alarm); static DEVICE_ATTR_RO(power1_label); static DEVICE_ATTR_RO(power1_input); static DEVICE_ATTR_RO(power2_label); static DEVICE_ATTR_RO(power2_input); static struct attribute *xgene_hwmon_attrs[] = …; ATTRIBUTE_GROUPS(…); static int xgene_hwmon_tpc_alarm(struct xgene_hwmon_dev *ctx, struct slimpro_resp_msg *amsg) { … } static void xgene_hwmon_process_pwrmsg(struct xgene_hwmon_dev *ctx, struct slimpro_resp_msg *amsg) { … } /* * This function is called to process async work queue */ static void xgene_hwmon_evt_work(struct work_struct *work) { … } static int xgene_hwmon_rx_ready(struct xgene_hwmon_dev *ctx, void *msg) { … } /* * This function is called when the SLIMpro Mailbox received a message */ static void xgene_hwmon_rx_cb(struct mbox_client *cl, void *msg) { … } /* * This function is called when the PCC Mailbox received a message */ static void xgene_hwmon_pcc_rx_cb(struct mbox_client *cl, void *msg) { … } static void xgene_hwmon_tx_done(struct mbox_client *cl, void *msg, int ret) { … } #ifdef CONFIG_ACPI static const struct acpi_device_id xgene_hwmon_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, xgene_hwmon_acpi_match); #endif static int xgene_hwmon_probe(struct platform_device *pdev) { … } static void xgene_hwmon_remove(struct platform_device *pdev) { … } static const struct of_device_id xgene_hwmon_of_match[] = …; MODULE_DEVICE_TABLE(of, xgene_hwmon_of_match); static struct platform_driver xgene_hwmon_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux