| /* |
| * Copyright 2016 Freescale Semiconductor, Inc. |
| * Copyright 2017 NXP. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/device_cooling.h> |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/thermal.h> |
| |
| #include "thermal_core.h" |
| |
| #define SITES_MAX 16 |
| |
| #define TMU_TEMP_PASSIVE_COOL_DELTA 10000 |
| |
| /* |
| * QorIQ TMU Registers |
| */ |
| struct qoriq_tmu_site_regs { |
| u32 tritsr; /* Immediate Temperature Site Register */ |
| u32 tratsr; /* Average Temperature Site Register */ |
| u8 res0[0x8]; |
| }; |
| |
| struct qoriq_tmu_regs { |
| u32 tmr; /* Mode Register */ |
| #define TMR_DISABLE 0x0 |
| #define TMR_ME 0x80000000 |
| #define TMR_ALPF 0x0c000000 |
| u32 tsr; /* Status Register */ |
| u32 tmtmir; /* Temperature measurement interval Register */ |
| #define TMTMIR_DEFAULT 0x0000000f |
| u8 res0[0x14]; |
| u32 tier; /* Interrupt Enable Register */ |
| #define TIER_DISABLE 0x0 |
| u32 tidr; /* Interrupt Detect Register */ |
| u32 tiscr; /* Interrupt Site Capture Register */ |
| u32 ticscr; /* Interrupt Critical Site Capture Register */ |
| u8 res1[0x10]; |
| u32 tmhtcrh; /* High Temperature Capture Register */ |
| u32 tmhtcrl; /* Low Temperature Capture Register */ |
| u8 res2[0x8]; |
| u32 tmhtitr; /* High Temperature Immediate Threshold */ |
| u32 tmhtatr; /* High Temperature Average Threshold */ |
| u32 tmhtactr; /* High Temperature Average Crit Threshold */ |
| u8 res3[0x24]; |
| u32 ttcfgr; /* Temperature Configuration Register */ |
| u32 tscfgr; /* Sensor Configuration Register */ |
| u8 res4[0x78]; |
| struct qoriq_tmu_site_regs site[SITES_MAX]; |
| u8 res5[0x9f8]; |
| u32 ipbrr0; /* IP Block Revision Register 0 */ |
| u32 ipbrr1; /* IP Block Revision Register 1 */ |
| u8 res6[0x310]; |
| u32 ttr0cr; /* Temperature Range 0 Control Register */ |
| u32 ttr1cr; /* Temperature Range 1 Control Register */ |
| u32 ttr2cr; /* Temperature Range 2 Control Register */ |
| u32 ttr3cr; /* Temperature Range 3 Control Register */ |
| }; |
| |
| /* |
| * Thermal zone data |
| */ |
| struct qoriq_tmu_data { |
| struct thermal_zone_device *tz; |
| struct thermal_cooling_device *cdev; |
| struct qoriq_tmu_regs __iomem *regs; |
| int sensor_id; |
| bool little_endian; |
| int temp_passive; |
| int temp_critical; |
| }; |
| |
| enum tmu_trip { |
| TMU_TRIP_PASSIVE, |
| TMU_TRIP_CRITICAL, |
| TMU_TRIP_NUM, |
| }; |
| |
| static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr) |
| { |
| if (p->little_endian) |
| iowrite32(val, addr); |
| else |
| iowrite32be(val, addr); |
| } |
| |
| static u32 tmu_read(struct qoriq_tmu_data *p, void __iomem *addr) |
| { |
| if (p->little_endian) |
| return ioread32(addr); |
| else |
| return ioread32be(addr); |
| } |
| |
| static int tmu_get_temp(void *p, int *temp) |
| { |
| u32 val; |
| struct qoriq_tmu_data *data = p; |
| |
| val = tmu_read(data, &data->regs->site[data->sensor_id].tritsr); |
| *temp = (val & 0xff) * 1000; |
| |
| return 0; |
| } |
| |
| static int qoriq_tmu_get_sensor_id(void) |
| { |
| int ret, id; |
| struct of_phandle_args sensor_specs; |
| struct device_node *np, *sensor_np; |
| |
| np = of_find_node_by_name(NULL, "thermal-zones"); |
| if (!np) |
| return -ENODEV; |
| |
| sensor_np = of_get_next_child(np, NULL); |
| ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors", |
| "#thermal-sensor-cells", |
| 0, &sensor_specs); |
| if (ret) { |
| of_node_put(np); |
| of_node_put(sensor_np); |
| return ret; |
| } |
| |
| if (sensor_specs.args_count >= 1) { |
| id = sensor_specs.args[0]; |
| WARN(sensor_specs.args_count > 1, |
| "%s: too many cells in sensor specifier %d\n", |
| sensor_specs.np->name, sensor_specs.args_count); |
| } else { |
| id = 0; |
| } |
| |
| of_node_put(np); |
| of_node_put(sensor_np); |
| |
| return id; |
| } |
| |
| static int qoriq_tmu_calibration(struct platform_device *pdev) |
| { |
| int i, val, len; |
| u32 range[4]; |
| const u32 *calibration; |
| struct device_node *np = pdev->dev.of_node; |
| struct qoriq_tmu_data *data = platform_get_drvdata(pdev); |
| |
| if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) { |
| dev_err(&pdev->dev, "missing calibration range.\n"); |
| return -ENODEV; |
| } |
| |
| /* Init temperature range registers */ |
| tmu_write(data, range[0], &data->regs->ttr0cr); |
| tmu_write(data, range[1], &data->regs->ttr1cr); |
| tmu_write(data, range[2], &data->regs->ttr2cr); |
| tmu_write(data, range[3], &data->regs->ttr3cr); |
| |
| calibration = of_get_property(np, "fsl,tmu-calibration", &len); |
| if (calibration == NULL || len % 8) { |
| dev_err(&pdev->dev, "invalid calibration data.\n"); |
| return -ENODEV; |
| } |
| |
| for (i = 0; i < len; i += 8, calibration += 2) { |
| val = of_read_number(calibration, 1); |
| tmu_write(data, val, &data->regs->ttcfgr); |
| val = of_read_number(calibration + 1, 1); |
| tmu_write(data, val, &data->regs->tscfgr); |
| } |
| |
| return 0; |
| } |
| |
| static void qoriq_tmu_init_device(struct qoriq_tmu_data *data) |
| { |
| /* Disable interrupt, using polling instead */ |
| tmu_write(data, TIER_DISABLE, &data->regs->tier); |
| |
| /* Set update_interval */ |
| tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir); |
| |
| /* Disable monitoring */ |
| tmu_write(data, TMR_DISABLE, &data->regs->tmr); |
| } |
| |
| static int tmu_get_trend(void *p, |
| int trip, enum thermal_trend *trend) |
| { |
| int trip_temp; |
| struct qoriq_tmu_data *data = p; |
| |
| if (!data->tz) |
| return 0; |
| |
| trip_temp = (trip == TMU_TRIP_PASSIVE) ? data->temp_passive : |
| data->temp_critical; |
| |
| if (data->tz->temperature >= |
| (trip_temp - TMU_TEMP_PASSIVE_COOL_DELTA)) |
| *trend = THERMAL_TREND_RAISE_FULL; |
| else |
| *trend = THERMAL_TREND_DROP_FULL; |
| |
| return 0; |
| } |
| |
| static int tmu_set_trip_temp(void *p, int trip, |
| int temp) |
| { |
| struct qoriq_tmu_data *data = p; |
| |
| if (trip == TMU_TRIP_CRITICAL) |
| data->temp_critical = temp; |
| |
| if (trip == TMU_TRIP_PASSIVE) |
| data->temp_passive = temp; |
| |
| return 0; |
| } |
| |
| static struct thermal_zone_of_device_ops tmu_tz_ops = { |
| .get_temp = tmu_get_temp, |
| .get_trend = tmu_get_trend, |
| .set_trip_temp = tmu_set_trip_temp, |
| }; |
| |
| static int qoriq_tmu_probe(struct platform_device *pdev) |
| { |
| int ret; |
| const struct thermal_trip *trip; |
| struct qoriq_tmu_data *data; |
| struct device_node *np = pdev->dev.of_node; |
| u32 site = 0; |
| |
| if (!np) { |
| dev_err(&pdev->dev, "Device OF-Node is NULL"); |
| return -ENODEV; |
| } |
| |
| data = devm_kzalloc(&pdev->dev, sizeof(struct qoriq_tmu_data), |
| GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| platform_set_drvdata(pdev, data); |
| |
| data->little_endian = of_property_read_bool(np, "little-endian"); |
| |
| data->sensor_id = qoriq_tmu_get_sensor_id(); |
| if (data->sensor_id < 0) { |
| dev_err(&pdev->dev, "Failed to get sensor id\n"); |
| ret = -ENODEV; |
| goto err_iomap; |
| } |
| |
| data->regs = of_iomap(np, 0); |
| if (!data->regs) { |
| dev_err(&pdev->dev, "Failed to get memory region\n"); |
| ret = -ENODEV; |
| goto err_iomap; |
| } |
| |
| qoriq_tmu_init_device(data); /* TMU initialization */ |
| |
| ret = qoriq_tmu_calibration(pdev); /* TMU calibration */ |
| if (ret < 0) |
| goto err_tmu; |
| |
| data->tz = thermal_zone_of_sensor_register(&pdev->dev, data->sensor_id, |
| data, &tmu_tz_ops); |
| if (IS_ERR(data->tz)) { |
| ret = PTR_ERR(data->tz); |
| dev_err(&pdev->dev, |
| "Failed to register thermal zone device %d\n", ret); |
| goto err_tmu; |
| } |
| |
| data->cdev = devfreq_cooling_register(); |
| if (IS_ERR(data->cdev)) { |
| ret = PTR_ERR(data->cdev); |
| if (ret != -EPROBE_DEFER) |
| dev_err(&pdev->dev, |
| "failed to register devfreq cooling device: %d\n", |
| ret); |
| return ret; |
| } |
| |
| ret = thermal_zone_bind_cooling_device(data->tz, |
| TMU_TRIP_PASSIVE, |
| data->cdev, |
| THERMAL_NO_LIMIT, |
| THERMAL_NO_LIMIT, |
| THERMAL_WEIGHT_DEFAULT); |
| if (ret) { |
| dev_err(&data->tz->device, |
| "binding zone %s with cdev %s failed:%d\n", |
| data->tz->type, data->cdev->type, ret); |
| devfreq_cooling_unregister(data->cdev); |
| return ret; |
| } |
| |
| trip = of_thermal_get_trip_points(data->tz); |
| data->temp_passive = trip[0].temperature; |
| data->temp_critical = trip[1].temperature; |
| |
| /* Enable monitoring */ |
| site |= 0x1 << (15 - data->sensor_id); |
| tmu_write(data, site | TMR_ME | TMR_ALPF, &data->regs->tmr); |
| |
| return 0; |
| |
| err_tmu: |
| iounmap(data->regs); |
| |
| err_iomap: |
| platform_set_drvdata(pdev, NULL); |
| |
| return ret; |
| } |
| |
| static int qoriq_tmu_remove(struct platform_device *pdev) |
| { |
| struct qoriq_tmu_data *data = platform_get_drvdata(pdev); |
| |
| devfreq_cooling_unregister(data->cdev); |
| thermal_zone_of_sensor_unregister(&pdev->dev, data->tz); |
| |
| /* Disable monitoring */ |
| tmu_write(data, TMR_DISABLE, &data->regs->tmr); |
| |
| iounmap(data->regs); |
| platform_set_drvdata(pdev, NULL); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int qoriq_tmu_suspend(struct device *dev) |
| { |
| u32 tmr; |
| struct qoriq_tmu_data *data = dev_get_drvdata(dev); |
| |
| /* Disable monitoring */ |
| tmr = tmu_read(data, &data->regs->tmr); |
| tmr &= ~TMR_ME; |
| tmu_write(data, tmr, &data->regs->tmr); |
| |
| return 0; |
| } |
| |
| static int qoriq_tmu_resume(struct device *dev) |
| { |
| u32 tmr; |
| struct qoriq_tmu_data *data = dev_get_drvdata(dev); |
| |
| /* Enable monitoring */ |
| tmr = tmu_read(data, &data->regs->tmr); |
| tmr |= TMR_ME; |
| tmu_write(data, tmr, &data->regs->tmr); |
| |
| return 0; |
| } |
| #endif |
| |
| static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops, |
| qoriq_tmu_suspend, qoriq_tmu_resume); |
| |
| static const struct of_device_id qoriq_tmu_match[] = { |
| { .compatible = "fsl,qoriq-tmu", }, |
| { .compatible = "fsl,imx8mq-tmu",}, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, qoriq_tmu_match); |
| |
| static struct platform_driver qoriq_tmu = { |
| .driver = { |
| .name = "qoriq_thermal", |
| .pm = &qoriq_tmu_pm_ops, |
| .of_match_table = qoriq_tmu_match, |
| }, |
| .probe = qoriq_tmu_probe, |
| .remove = qoriq_tmu_remove, |
| }; |
| module_platform_driver(qoriq_tmu); |
| |
| MODULE_AUTHOR("Jia Hongtao <hongtao.jia@nxp.com>"); |
| MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver"); |
| MODULE_LICENSE("GPL v2"); |