| /* |
| * 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 <linux/slab.h> |
| |
| #include "thermal_core.h" |
| |
| #define SITES_MAX 16 |
| |
| enum tmu_throttle_id { |
| THROTTLE_DEVFREQ = 0, |
| THROTTLE_NUM, |
| }; |
| static const char *const throt_names[] = { |
| [THROTTLE_DEVFREQ] = "devfreq", |
| }; |
| |
| /* |
| * 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 */ |
| }; |
| |
| struct tmu_throttle_params { |
| const char *name; |
| struct thermal_cooling_device *cdev; |
| int max_state; |
| bool inited; |
| }; |
| /* |
| * Thermal zone data |
| */ |
| struct qoriq_tmu_data { |
| struct thermal_zone_device *tz; |
| struct qoriq_tmu_regs __iomem *regs; |
| int sensor_id; |
| bool little_endian; |
| struct tmu_throttle_params throt_cfgs[THROTTLE_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, trip_hyst; |
| struct qoriq_tmu_data *data = p; |
| |
| if (!data->tz) |
| return 0; |
| |
| if (!data->tz->ops->get_trip_temp || |
| !data->tz->ops->get_trip_hyst || |
| data->tz->ops->get_trip_temp(data->tz, trip, &trip_temp) || |
| data->tz->ops->get_trip_hyst(data->tz, trip, &trip_hyst)) { |
| *trend = THERMAL_TREND_RAISE_FULL; |
| return 0; |
| } |
| |
| if (data->tz->temperature >= (trip_temp - trip_hyst)) |
| *trend = THERMAL_TREND_RAISE_FULL; |
| else |
| *trend = THERMAL_TREND_DROP_FULL; |
| |
| return 0; |
| } |
| |
| static struct thermal_zone_of_device_ops tmu_tz_ops = { |
| .get_temp = tmu_get_temp, |
| .get_trend = tmu_get_trend, |
| }; |
| |
| static struct tmu_throttle_params * |
| find_throttle_cfg_by_name(struct qoriq_tmu_data *qt, const char *name) |
| { |
| unsigned int i; |
| |
| for (i = 0; qt->throt_cfgs[i].name && i<THROTTLE_NUM; i++) |
| if (!strcmp(qt->throt_cfgs[i].name, name)) |
| return &qt->throt_cfgs[i]; |
| |
| return NULL; |
| } |
| |
| /** |
| * tmu_init_throttle_cdev() - Parse the throttle configurations |
| * and register them as cooling devices. |
| */ |
| static int tmu_init_throttle_cdev(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct qoriq_tmu_data *qt = dev_get_drvdata(dev); |
| struct device_node *np_tc, *np_tcc; |
| struct thermal_cooling_device *tcd; |
| const char *name; |
| u32 val; |
| int i, ret = 0; |
| |
| for (i = 0; i < THROTTLE_NUM; i++) { |
| qt->throt_cfgs[i].name = throt_names[i]; |
| qt->throt_cfgs[i].inited = false; |
| } |
| |
| np_tc = of_get_child_by_name(dev->of_node, "throttle-cfgs"); |
| if (!np_tc) { |
| dev_info(dev, |
| "throttle-cfg: no throttle-cfgs" |
| " - use default devfreq cooling device\n"); |
| tcd = devfreq_cooling_register(NULL, 1); |
| if (IS_ERR(tcd)) { |
| ret = PTR_ERR(tcd); |
| if (ret != -EPROBE_DEFER) |
| dev_err(&pdev->dev, |
| "failed to register" |
| "devfreq cooling device: %d\n", |
| ret); |
| return ret; |
| } |
| return 0; |
| } |
| |
| for_each_child_of_node(np_tc, np_tcc) { |
| struct tmu_throttle_params *ttp; |
| name = np_tcc->name; |
| ttp = find_throttle_cfg_by_name(qt, name); |
| if (!ttp) { |
| dev_err(dev, |
| "throttle-cfg: could not find %s\n", name); |
| continue; |
| } |
| |
| ret = of_property_read_u32(np_tcc, "throttle,max_state", &val); |
| if (ret) { |
| dev_info(dev, |
| "throttle-cfg: %s: missing throttle max state\n", name); |
| continue; |
| } |
| ttp->max_state = val; |
| |
| tcd = devfreq_cooling_register(np_tcc, ttp->max_state); |
| of_node_put(np_tcc); |
| if (IS_ERR(tcd)) { |
| ret = PTR_ERR(tcd); |
| dev_err(dev, |
| "throttle-cfg: %s: failed to register cooling device\n", |
| name); |
| continue; |
| } |
| ttp->cdev = tcd; |
| ttp->inited = true; |
| } |
| |
| of_node_put(np_tc); |
| return ret; |
| } |
| |
| static int qoriq_tmu_probe(struct platform_device *pdev) |
| { |
| int ret; |
| 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; |
| } |
| |
| ret = tmu_init_throttle_cdev(pdev); |
| if (ret) |
| goto err_tmu; |
| |
| /* 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) |
| { |
| int i; |
| struct qoriq_tmu_data *data = platform_get_drvdata(pdev); |
| |
| for (i=0; i<THROTTLE_NUM; i++) |
| if (data->throt_cfgs[i].inited) |
| devfreq_cooling_unregister(data->throt_cfgs[i].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"); |