diff options
Diffstat (limited to 'drivers/thermal/tegra/soctherm.c')
| -rw-r--r-- | drivers/thermal/tegra/soctherm.c | 2333 |
1 files changed, 2333 insertions, 0 deletions
diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c new file mode 100644 index 000000000..66e0639da --- /dev/null +++ b/drivers/thermal/tegra/soctherm.c @@ -0,0 +1,2333 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2014 - 2018, NVIDIA CORPORATION. All rights reserved. + * + * Author: + * Mikko Perttunen <mperttunen@nvidia.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that 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/debugfs.h> +#include <linux/bitops.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/reset.h> +#include <linux/thermal.h> + +#include <dt-bindings/thermal/tegra124-soctherm.h> + +#include "../thermal_core.h" +#include "soctherm.h" + +#define SENSOR_CONFIG0 0 +#define SENSOR_CONFIG0_STOP BIT(0) +#define SENSOR_CONFIG0_CPTR_OVER BIT(2) +#define SENSOR_CONFIG0_OVER BIT(3) +#define SENSOR_CONFIG0_TCALC_OVER BIT(4) +#define SENSOR_CONFIG0_TALL_MASK (0xfffff << 8) +#define SENSOR_CONFIG0_TALL_SHIFT 8 + +#define SENSOR_CONFIG1 4 +#define SENSOR_CONFIG1_TSAMPLE_MASK 0x3ff +#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0 +#define SENSOR_CONFIG1_TIDDQ_EN_MASK (0x3f << 15) +#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15 +#define SENSOR_CONFIG1_TEN_COUNT_MASK (0x3f << 24) +#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24 +#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31) + +/* + * SENSOR_CONFIG2 is defined in soctherm.h + * because, it will be used by tegra_soctherm_fuse.c + */ + +#define SENSOR_STATUS0 0xc +#define SENSOR_STATUS0_VALID_MASK BIT(31) +#define SENSOR_STATUS0_CAPTURE_MASK 0xffff + +#define SENSOR_STATUS1 0x10 +#define SENSOR_STATUS1_TEMP_VALID_MASK BIT(31) +#define SENSOR_STATUS1_TEMP_MASK 0xffff + +#define READBACK_VALUE_MASK 0xff00 +#define READBACK_VALUE_SHIFT 8 +#define READBACK_ADD_HALF BIT(7) +#define READBACK_NEGATE BIT(0) + +/* + * THERMCTL_LEVEL0_GROUP_CPU is defined in soctherm.h + * because it will be used by tegraxxx_soctherm.c + */ +#define THERMCTL_LVL0_CPU0_EN_MASK BIT(8) +#define THERMCTL_LVL0_CPU0_CPU_THROT_MASK (0x3 << 5) +#define THERMCTL_LVL0_CPU0_CPU_THROT_LIGHT 0x1 +#define THERMCTL_LVL0_CPU0_CPU_THROT_HEAVY 0x2 +#define THERMCTL_LVL0_CPU0_GPU_THROT_MASK (0x3 << 3) +#define THERMCTL_LVL0_CPU0_GPU_THROT_LIGHT 0x1 +#define THERMCTL_LVL0_CPU0_GPU_THROT_HEAVY 0x2 +#define THERMCTL_LVL0_CPU0_MEM_THROT_MASK BIT(2) +#define THERMCTL_LVL0_CPU0_STATUS_MASK 0x3 + +#define THERMCTL_LVL0_UP_STATS 0x10 +#define THERMCTL_LVL0_DN_STATS 0x14 + +#define THERMCTL_INTR_STATUS 0x84 + +#define TH_INTR_MD0_MASK BIT(25) +#define TH_INTR_MU0_MASK BIT(24) +#define TH_INTR_GD0_MASK BIT(17) +#define TH_INTR_GU0_MASK BIT(16) +#define TH_INTR_CD0_MASK BIT(9) +#define TH_INTR_CU0_MASK BIT(8) +#define TH_INTR_PD0_MASK BIT(1) +#define TH_INTR_PU0_MASK BIT(0) +#define TH_INTR_IGNORE_MASK 0xFCFCFCFC + +#define THERMCTL_STATS_CTL 0x94 +#define STATS_CTL_CLR_DN 0x8 +#define STATS_CTL_EN_DN 0x4 +#define STATS_CTL_CLR_UP 0x2 +#define STATS_CTL_EN_UP 0x1 + +#define OC1_CFG 0x310 +#define OC1_CFG_LONG_LATENCY_MASK BIT(6) +#define OC1_CFG_HW_RESTORE_MASK BIT(5) +#define OC1_CFG_PWR_GOOD_MASK_MASK BIT(4) +#define OC1_CFG_THROTTLE_MODE_MASK (0x3 << 2) +#define OC1_CFG_ALARM_POLARITY_MASK BIT(1) +#define OC1_CFG_EN_THROTTLE_MASK BIT(0) + +#define OC1_CNT_THRESHOLD 0x314 +#define OC1_THROTTLE_PERIOD 0x318 +#define OC1_ALARM_COUNT 0x31c +#define OC1_FILTER 0x320 +#define OC1_STATS 0x3a8 + +#define OC_INTR_STATUS 0x39c +#define OC_INTR_ENABLE 0x3a0 +#define OC_INTR_DISABLE 0x3a4 +#define OC_STATS_CTL 0x3c4 +#define OC_STATS_CTL_CLR_ALL 0x2 +#define OC_STATS_CTL_EN_ALL 0x1 + +#define OC_INTR_OC1_MASK BIT(0) +#define OC_INTR_OC2_MASK BIT(1) +#define OC_INTR_OC3_MASK BIT(2) +#define OC_INTR_OC4_MASK BIT(3) +#define OC_INTR_OC5_MASK BIT(4) + +#define THROT_GLOBAL_CFG 0x400 +#define THROT_GLOBAL_ENB_MASK BIT(0) + +#define CPU_PSKIP_STATUS 0x418 +#define XPU_PSKIP_STATUS_M_MASK (0xff << 12) +#define XPU_PSKIP_STATUS_N_MASK (0xff << 4) +#define XPU_PSKIP_STATUS_SW_OVERRIDE_MASK BIT(1) +#define XPU_PSKIP_STATUS_ENABLED_MASK BIT(0) + +#define THROT_PRIORITY_LOCK 0x424 +#define THROT_PRIORITY_LOCK_PRIORITY_MASK 0xff + +#define THROT_STATUS 0x428 +#define THROT_STATUS_BREACH_MASK BIT(12) +#define THROT_STATUS_STATE_MASK (0xff << 4) +#define THROT_STATUS_ENABLED_MASK BIT(0) + +#define THROT_PSKIP_CTRL_LITE_CPU 0x430 +#define THROT_PSKIP_CTRL_ENABLE_MASK BIT(31) +#define THROT_PSKIP_CTRL_DIVIDEND_MASK (0xff << 8) +#define THROT_PSKIP_CTRL_DIVISOR_MASK 0xff +#define THROT_PSKIP_CTRL_VECT_GPU_MASK (0x7 << 16) +#define THROT_PSKIP_CTRL_VECT_CPU_MASK (0x7 << 8) +#define THROT_PSKIP_CTRL_VECT2_CPU_MASK 0x7 + +#define THROT_VECT_NONE 0x0 /* 3'b000 */ +#define THROT_VECT_LOW 0x1 /* 3'b001 */ +#define THROT_VECT_MED 0x3 /* 3'b011 */ +#define THROT_VECT_HIGH 0x7 /* 3'b111 */ + +#define THROT_PSKIP_RAMP_LITE_CPU 0x434 +#define THROT_PSKIP_RAMP_SEQ_BYPASS_MODE_MASK BIT(31) +#define THROT_PSKIP_RAMP_DURATION_MASK (0xffff << 8) +#define THROT_PSKIP_RAMP_STEP_MASK 0xff + +#define THROT_PRIORITY_LITE 0x444 +#define THROT_PRIORITY_LITE_PRIO_MASK 0xff + +#define THROT_DELAY_LITE 0x448 +#define THROT_DELAY_LITE_DELAY_MASK 0xff + +/* car register offsets needed for enabling HW throttling */ +#define CAR_SUPER_CCLKG_DIVIDER 0x36c +#define CDIVG_USE_THERM_CONTROLS_MASK BIT(30) + +/* ccroc register offsets needed for enabling HW throttling for Tegra132 */ +#define CCROC_SUPER_CCLKG_DIVIDER 0x024 + +#define CCROC_GLOBAL_CFG 0x148 + +#define CCROC_THROT_PSKIP_RAMP_CPU 0x150 +#define CCROC_THROT_PSKIP_RAMP_SEQ_BYPASS_MODE_MASK BIT(31) +#define CCROC_THROT_PSKIP_RAMP_DURATION_MASK (0xffff << 8) +#define CCROC_THROT_PSKIP_RAMP_STEP_MASK 0xff + +#define CCROC_THROT_PSKIP_CTRL_CPU 0x154 +#define CCROC_THROT_PSKIP_CTRL_ENB_MASK BIT(31) +#define CCROC_THROT_PSKIP_CTRL_DIVIDEND_MASK (0xff << 8) +#define CCROC_THROT_PSKIP_CTRL_DIVISOR_MASK 0xff + +/* get val from register(r) mask bits(m) */ +#define REG_GET_MASK(r, m) (((r) & (m)) >> (ffs(m) - 1)) +/* set val(v) to mask bits(m) of register(r) */ +#define REG_SET_MASK(r, m, v) (((r) & ~(m)) | \ + (((v) & (m >> (ffs(m) - 1))) << (ffs(m) - 1))) + +/* get dividend from the depth */ +#define THROT_DEPTH_DIVIDEND(depth) ((256 * (100 - (depth)) / 100) - 1) + +/* gk20a nv_therm interface N:3 Mapping. Levels defined in tegra124-soctherm.h + * level vector + * NONE 3'b000 + * LOW 3'b001 + * MED 3'b011 + * HIGH 3'b111 + */ +#define THROT_LEVEL_TO_DEPTH(level) ((0x1 << (level)) - 1) + +/* get THROT_PSKIP_xxx offset per LIGHT/HEAVY throt and CPU/GPU dev */ +#define THROT_OFFSET 0x30 +#define THROT_PSKIP_CTRL(throt, dev) (THROT_PSKIP_CTRL_LITE_CPU + \ + (THROT_OFFSET * throt) + (8 * dev)) +#define THROT_PSKIP_RAMP(throt, dev) (THROT_PSKIP_RAMP_LITE_CPU + \ + (THROT_OFFSET * throt) + (8 * dev)) + +/* get THROT_xxx_CTRL offset per LIGHT/HEAVY throt */ +#define THROT_PRIORITY_CTRL(throt) (THROT_PRIORITY_LITE + \ + (THROT_OFFSET * throt)) +#define THROT_DELAY_CTRL(throt) (THROT_DELAY_LITE + \ + (THROT_OFFSET * throt)) + +#define ALARM_OFFSET 0x14 +#define ALARM_CFG(throt) (OC1_CFG + \ + (ALARM_OFFSET * (throt - THROTTLE_OC1))) + +#define ALARM_CNT_THRESHOLD(throt) (OC1_CNT_THRESHOLD + \ + (ALARM_OFFSET * (throt - THROTTLE_OC1))) + +#define ALARM_THROTTLE_PERIOD(throt) (OC1_THROTTLE_PERIOD + \ + (ALARM_OFFSET * (throt - THROTTLE_OC1))) + +#define ALARM_ALARM_COUNT(throt) (OC1_ALARM_COUNT + \ + (ALARM_OFFSET * (throt - THROTTLE_OC1))) + +#define ALARM_FILTER(throt) (OC1_FILTER + \ + (ALARM_OFFSET * (throt - THROTTLE_OC1))) + +#define ALARM_STATS(throt) (OC1_STATS + \ + (4 * (throt - THROTTLE_OC1))) + +/* get CCROC_THROT_PSKIP_xxx offset per HIGH/MED/LOW vect*/ +#define CCROC_THROT_OFFSET 0x0c +#define CCROC_THROT_PSKIP_CTRL_CPU_REG(vect) (CCROC_THROT_PSKIP_CTRL_CPU + \ + (CCROC_THROT_OFFSET * vect)) +#define CCROC_THROT_PSKIP_RAMP_CPU_REG(vect) (CCROC_THROT_PSKIP_RAMP_CPU + \ + (CCROC_THROT_OFFSET * vect)) + +/* get THERMCTL_LEVELx offset per CPU/GPU/MEM/TSENSE rg and LEVEL0~3 lv */ +#define THERMCTL_LVL_REGS_SIZE 0x20 +#define THERMCTL_LVL_REG(rg, lv) ((rg) + ((lv) * THERMCTL_LVL_REGS_SIZE)) + +#define OC_THROTTLE_MODE_DISABLED 0 +#define OC_THROTTLE_MODE_BRIEF 2 + +static const int min_low_temp = -127000; +static const int max_high_temp = 127000; + +enum soctherm_throttle_id { + THROTTLE_LIGHT = 0, + THROTTLE_HEAVY, + THROTTLE_OC1, + THROTTLE_OC2, + THROTTLE_OC3, + THROTTLE_OC4, + THROTTLE_OC5, /* OC5 is reserved */ + THROTTLE_SIZE, +}; + +enum soctherm_oc_irq_id { + TEGRA_SOC_OC_IRQ_1, + TEGRA_SOC_OC_IRQ_2, + TEGRA_SOC_OC_IRQ_3, + TEGRA_SOC_OC_IRQ_4, + TEGRA_SOC_OC_IRQ_5, + TEGRA_SOC_OC_IRQ_MAX, +}; + +enum soctherm_throttle_dev_id { + THROTTLE_DEV_CPU = 0, + THROTTLE_DEV_GPU, + THROTTLE_DEV_SIZE, +}; + +static const char *const throt_names[] = { + [THROTTLE_LIGHT] = "light", + [THROTTLE_HEAVY] = "heavy", + [THROTTLE_OC1] = "oc1", + [THROTTLE_OC2] = "oc2", + [THROTTLE_OC3] = "oc3", + [THROTTLE_OC4] = "oc4", + [THROTTLE_OC5] = "oc5", +}; + +struct tegra_soctherm; +struct tegra_thermctl_zone { + void __iomem *reg; + struct device *dev; + struct tegra_soctherm *ts; + struct thermal_zone_device *tz; + const struct tegra_tsensor_group *sg; +}; + +struct soctherm_oc_cfg { + u32 active_low; + u32 throt_period; + u32 alarm_cnt_thresh; + u32 alarm_filter; + u32 mode; + bool intr_en; +}; + +struct soctherm_throt_cfg { + const char *name; + unsigned int id; + u8 priority; + u8 cpu_throt_level; + u32 cpu_throt_depth; + u32 gpu_throt_level; + struct soctherm_oc_cfg oc_cfg; + struct thermal_cooling_device *cdev; + bool init; +}; + +struct tegra_soctherm { + struct reset_control *reset; + struct clk *clock_tsensor; + struct clk *clock_soctherm; + void __iomem *regs; + void __iomem *clk_regs; + void __iomem *ccroc_regs; + + int thermal_irq; + int edp_irq; + + u32 *calib; + struct thermal_zone_device **thermctl_tzs; + struct tegra_soctherm_soc *soc; + + struct soctherm_throt_cfg throt_cfgs[THROTTLE_SIZE]; + + struct dentry *debugfs_dir; + + struct mutex thermctl_lock; +}; + +struct soctherm_oc_irq_chip_data { + struct mutex irq_lock; /* serialize OC IRQs */ + struct irq_chip irq_chip; + struct irq_domain *domain; + int irq_enable; +}; + +static struct soctherm_oc_irq_chip_data soc_irq_cdata; + +/** + * ccroc_writel() - writes a value to a CCROC register + * @ts: pointer to a struct tegra_soctherm + * @value: the value to write + * @reg: the register offset + * + * Writes @v to @reg. No return value. + */ +static inline void ccroc_writel(struct tegra_soctherm *ts, u32 value, u32 reg) +{ + writel(value, (ts->ccroc_regs + reg)); +} + +/** + * ccroc_readl() - reads specified register from CCROC IP block + * @ts: pointer to a struct tegra_soctherm + * @reg: register address to be read + * + * Return: the value of the register + */ +static inline u32 ccroc_readl(struct tegra_soctherm *ts, u32 reg) +{ + return readl(ts->ccroc_regs + reg); +} + +static void enable_tsensor(struct tegra_soctherm *tegra, unsigned int i) +{ + const struct tegra_tsensor *sensor = &tegra->soc->tsensors[i]; + void __iomem *base = tegra->regs + sensor->base; + unsigned int val; + + val = sensor->config->tall << SENSOR_CONFIG0_TALL_SHIFT; + writel(val, base + SENSOR_CONFIG0); + + val = (sensor->config->tsample - 1) << SENSOR_CONFIG1_TSAMPLE_SHIFT; + val |= sensor->config->tiddq_en << SENSOR_CONFIG1_TIDDQ_EN_SHIFT; + val |= sensor->config->ten_count << SENSOR_CONFIG1_TEN_COUNT_SHIFT; + val |= SENSOR_CONFIG1_TEMP_ENABLE; + writel(val, base + SENSOR_CONFIG1); + + writel(tegra->calib[i], base + SENSOR_CONFIG2); +} + +/* + * Translate from soctherm readback format to millicelsius. + * The soctherm readback format in bits is as follows: + * TTTTTTTT H______N + * where T's contain the temperature in Celsius, + * H denotes an addition of 0.5 Celsius and N denotes negation + * of the final value. + */ +static int translate_temp(u16 val) +{ + int t; + + t = ((val & READBACK_VALUE_MASK) >> READBACK_VALUE_SHIFT) * 1000; + if (val & READBACK_ADD_HALF) + t += 500; + if (val & READBACK_NEGATE) + t *= -1; + + return t; +} + +static int tegra_thermctl_get_temp(void *data, int *out_temp) +{ + struct tegra_thermctl_zone *zone = data; + u32 val; + + val = readl(zone->reg); + val = REG_GET_MASK(val, zone->sg->sensor_temp_mask); + *out_temp = translate_temp(val); + + return 0; +} + +/** + * enforce_temp_range() - check and enforce temperature range [min, max] + * @dev: struct device * of the SOC_THERM instance + * @trip_temp: the trip temperature to check + * + * Checks and enforces the permitted temperature range that SOC_THERM + * HW can support This is + * done while taking care of precision. + * + * Return: The precision adjusted capped temperature in millicelsius. + */ +static int enforce_temp_range(struct device *dev, int trip_temp) +{ + int temp; + + temp = clamp_val(trip_temp, min_low_temp, max_high_temp); + if (temp != trip_temp) + dev_info(dev, "soctherm: trip temperature %d forced to %d\n", + trip_temp, temp); + return temp; +} + +/** + * thermtrip_program() - Configures the hardware to shut down the + * system if a given sensor group reaches a given temperature + * @dev: ptr to the struct device for the SOC_THERM IP block + * @sg: pointer to the sensor group to set the thermtrip temperature for + * @trip_temp: the temperature in millicelsius to trigger the thermal trip at + * + * Sets the thermal trip threshold of the given sensor group to be the + * @trip_temp. If this threshold is crossed, the hardware will shut + * down. + * + * Note that, although @trip_temp is specified in millicelsius, the + * hardware is programmed in degrees Celsius. + * + * Return: 0 upon success, or %-EINVAL upon failure. + */ +static int thermtrip_program(struct device *dev, + const struct tegra_tsensor_group *sg, + int trip_temp) +{ + struct tegra_soctherm *ts = dev_get_drvdata(dev); + int temp; + u32 r; + + if (!sg || !sg->thermtrip_threshold_mask) + return -EINVAL; + + temp = enforce_temp_range(dev, trip_temp) / ts->soc->thresh_grain; + + r = readl(ts->regs + THERMCTL_THERMTRIP_CTL); + r = REG_SET_MASK(r, sg->thermtrip_threshold_mask, temp); + r = REG_SET_MASK(r, sg->thermtrip_enable_mask, 1); + r = REG_SET_MASK(r, sg->thermtrip_any_en_mask, 0); + writel(r, ts->regs + THERMCTL_THERMTRIP_CTL); + + return 0; +} + +/** + * throttrip_program() - Configures the hardware to throttle the + * pulse if a given sensor group reaches a given temperature + * @dev: ptr to the struct device for the SOC_THERM IP block + * @sg: pointer to the sensor group to set the thermtrip temperature for + * @stc: pointer to the throttle need to be triggered + * @trip_temp: the temperature in millicelsius to trigger the thermal trip at + * + * Sets the thermal trip threshold and throttle event of the given sensor + * group. If this threshold is crossed, the hardware will trigger the + * throttle. + * + * Note that, although @trip_temp is specified in millicelsius, the + * hardware is programmed in degrees Celsius. + * + * Return: 0 upon success, or %-EINVAL upon failure. + */ +static int throttrip_program(struct device *dev, + const struct tegra_tsensor_group *sg, + struct soctherm_throt_cfg *stc, + int trip_temp) +{ + struct tegra_soctherm *ts = dev_get_drvdata(dev); + int temp, cpu_throt, gpu_throt; + unsigned int throt; + u32 r, reg_off; + + if (!sg || !stc || !stc->init) + return -EINVAL; + + temp = enforce_temp_range(dev, trip_temp) / ts->soc->thresh_grain; + + /* Hardcode LIGHT on LEVEL1 and HEAVY on LEVEL2 */ + throt = stc->id; + reg_off = THERMCTL_LVL_REG(sg->thermctl_lvl0_offset, throt + 1); + + if (throt == THROTTLE_LIGHT) { + cpu_throt = THERMCTL_LVL0_CPU0_CPU_THROT_LIGHT; + gpu_throt = THERMCTL_LVL0_CPU0_GPU_THROT_LIGHT; + } else { + cpu_throt = THERMCTL_LVL0_CPU0_CPU_THROT_HEAVY; + gpu_throt = THERMCTL_LVL0_CPU0_GPU_THROT_HEAVY; + if (throt != THROTTLE_HEAVY) + dev_warn(dev, + "invalid throt id %d - assuming HEAVY", + throt); + } + + r = readl(ts->regs + reg_off); + r = REG_SET_MASK(r, sg->thermctl_lvl0_up_thresh_mask, temp); + r = REG_SET_MASK(r, sg->thermctl_lvl0_dn_thresh_mask, temp); + r = REG_SET_MASK(r, THERMCTL_LVL0_CPU0_CPU_THROT_MASK, cpu_throt); + r = REG_SET_MASK(r, THERMCTL_LVL0_CPU0_GPU_THROT_MASK, gpu_throt); + r = REG_SET_MASK(r, THERMCTL_LVL0_CPU0_EN_MASK, 1); + writel(r, ts->regs + reg_off); + + return 0; +} + +static struct soctherm_throt_cfg * +find_throttle_cfg_by_name(struct tegra_soctherm *ts, const char *name) +{ + unsigned int i; + + for (i = 0; ts->throt_cfgs[i].name; i++) + if (!strcmp(ts->throt_cfgs[i].name, name)) + return &ts->throt_cfgs[i]; + + return NULL; +} + +static int tsensor_group_thermtrip_get(struct tegra_soctherm *ts, int id) +{ + int i, temp = min_low_temp; + struct tsensor_group_thermtrips *tt = ts->soc->thermtrips; + + if (id >= TEGRA124_SOCTHERM_SENSOR_NUM) + return temp; + + if (tt) { + for (i = 0; i < ts->soc->num_ttgs; i++) { + if (tt[i].id == id) + return tt[i].temp; + } + } + + return temp; +} + +static int tegra_thermctl_set_trip_temp(void *data, int trip, int temp) +{ + struct tegra_thermctl_zone *zone = data; + struct thermal_zone_device *tz = zone->tz; + struct tegra_soctherm *ts = zone->ts; + const struct tegra_tsensor_group *sg = zone->sg; + struct device *dev = zone->dev; + enum thermal_trip_type type; + int ret; + + if (!tz) + return -EINVAL; + + ret = tz->ops->get_trip_type(tz, trip, &type); + if (ret) + return ret; + + if (type == THERMAL_TRIP_CRITICAL) { + /* + * If thermtrips property is set in DT, + * doesn't need to program critical type trip to HW, + * if not, program critical trip to HW. + */ + if (min_low_temp == tsensor_group_thermtrip_get(ts, sg->id)) + return thermtrip_program(dev, sg, temp); + else + return 0; + + } else if (type == THERMAL_TRIP_HOT) { + int i; + + for (i = 0; i < THROTTLE_SIZE; i++) { + struct thermal_cooling_device *cdev; + struct soctherm_throt_cfg *stc; + + if (!ts->throt_cfgs[i].init) + continue; + + cdev = ts->throt_cfgs[i].cdev; + if (get_thermal_instance(tz, cdev, trip)) + stc = find_throttle_cfg_by_name(ts, cdev->type); + else + continue; + + return throttrip_program(dev, sg, stc, temp); + } + } + + return 0; +} + +static int tegra_thermctl_get_trend(void *data, int trip, + enum thermal_trend *trend) +{ + struct tegra_thermctl_zone *zone = data; + struct thermal_zone_device *tz = zone->tz; + int trip_temp, temp, last_temp, ret; + + if (!tz) + return -EINVAL; + + ret = tz->ops->get_trip_temp(zone->tz, trip, &trip_temp); + if (ret) + return ret; + + temp = READ_ONCE(tz->temperature); + last_temp = READ_ONCE(tz->last_temperature); + + if (temp > trip_temp) { + if (temp >= last_temp) + *trend = THERMAL_TREND_RAISING; + else + *trend = THERMAL_TREND_STABLE; + } else if (temp < trip_temp) { + *trend = THERMAL_TREND_DROPPING; + } else { + *trend = THERMAL_TREND_STABLE; + } + + return 0; +} + +static void thermal_irq_enable(struct tegra_thermctl_zone *zn) +{ + u32 r; + + /* multiple zones could be handling and setting trips at once */ + mutex_lock(&zn->ts->thermctl_lock); + r = readl(zn->ts->regs + THERMCTL_INTR_ENABLE); + r = REG_SET_MASK(r, zn->sg->thermctl_isr_mask, TH_INTR_UP_DN_EN); + writel(r, zn->ts->regs + THERMCTL_INTR_ENABLE); + mutex_unlock(&zn->ts->thermctl_lock); +} + +static void thermal_irq_disable(struct tegra_thermctl_zone *zn) +{ + u32 r; + + /* multiple zones could be handling and setting trips at once */ + mutex_lock(&zn->ts->thermctl_lock); + r = readl(zn->ts->regs + THERMCTL_INTR_DISABLE); + r = REG_SET_MASK(r, zn->sg->thermctl_isr_mask, 0); + writel(r, zn->ts->regs + THERMCTL_INTR_DISABLE); + mutex_unlock(&zn->ts->thermctl_lock); +} + +static int tegra_thermctl_set_trips(void *data, int lo, int hi) +{ + struct tegra_thermctl_zone *zone = data; + u32 r; + + thermal_irq_disable(zone); + + r = readl(zone->ts->regs + zone->sg->thermctl_lvl0_offset); + r = REG_SET_MASK(r, THERMCTL_LVL0_CPU0_EN_MASK, 0); + writel(r, zone->ts->regs + zone->sg->thermctl_lvl0_offset); + + lo = enforce_temp_range(zone->dev, lo) / zone->ts->soc->thresh_grain; + hi = enforce_temp_range(zone->dev, hi) / zone->ts->soc->thresh_grain; + dev_dbg(zone->dev, "%s hi:%d, lo:%d\n", __func__, hi, lo); + + r = REG_SET_MASK(r, zone->sg->thermctl_lvl0_up_thresh_mask, hi); + r = REG_SET_MASK(r, zone->sg->thermctl_lvl0_dn_thresh_mask, lo); + r = REG_SET_MASK(r, THERMCTL_LVL0_CPU0_EN_MASK, 1); + writel(r, zone->ts->regs + zone->sg->thermctl_lvl0_offset); + + thermal_irq_enable(zone); + + return 0; +} + +static const struct thermal_zone_of_device_ops tegra_of_thermal_ops = { + .get_temp = tegra_thermctl_get_temp, + .set_trip_temp = tegra_thermctl_set_trip_temp, + .get_trend = tegra_thermctl_get_trend, + .set_trips = tegra_thermctl_set_trips, +}; + +static int get_hot_temp(struct thermal_zone_device *tz, int *trip, int *temp) +{ + int ntrips, i, ret; + enum thermal_trip_type type; + + ntrips = of_thermal_get_ntrips(tz); + if (ntrips <= 0) + return -EINVAL; + + for (i = 0; i < ntrips; i++) { + ret = tz->ops->get_trip_type(tz, i, &type); + if (ret) + return -EINVAL; + if (type == THERMAL_TRIP_HOT) { + ret = tz->ops->get_trip_temp(tz, i, temp); + if (!ret) + *trip = i; + + return ret; + } + } + + return -EINVAL; +} + +/** + * tegra_soctherm_set_hwtrips() - set HW trip point from DT data + * @dev: struct device * of the SOC_THERM instance + * @sg: pointer to the sensor group to set the thermtrip temperature for + * @tz: struct thermal_zone_device * + * + * Configure the SOC_THERM HW trip points, setting "THERMTRIP" + * "THROTTLE" trip points , using "thermtrips", "critical" or "hot" + * type trip_temp + * from thermal zone. + * After they have been configured, THERMTRIP or THROTTLE will take + * action when the configured SoC thermal sensor group reaches a + * certain temperature. + * + * Return: 0 upon success, or a negative error code on failure. + * "Success" does not mean that trips was enabled; it could also + * mean that no node was found in DT. + * THERMTRIP has been enabled successfully when a message similar to + * this one appears on the serial console: + * "thermtrip: will shut down when sensor group XXX reaches YYYYYY mC" + * THROTTLE has been enabled successfully when a message similar to + * this one appears on the serial console: + * ""throttrip: will throttle when sensor group XXX reaches YYYYYY mC" + */ +static int tegra_soctherm_set_hwtrips(struct device *dev, + const struct tegra_tsensor_group *sg, + struct thermal_zone_device *tz) +{ + struct tegra_soctherm *ts = dev_get_drvdata(dev); + struct soctherm_throt_cfg *stc; + int i, trip, temperature, ret; + + /* Get thermtrips. If missing, try to get critical trips. */ + temperature = tsensor_group_thermtrip_get(ts, sg->id); + if (min_low_temp == temperature) + if (tz->ops->get_crit_temp(tz, &temperature)) + temperature = max_high_temp; + + ret = thermtrip_program(dev, sg, temperature); + if (ret) { + dev_err(dev, "thermtrip: %s: error during enable\n", sg->name); + return ret; + } + + dev_info(dev, "thermtrip: will shut down when %s reaches %d mC\n", + sg->name, temperature); + + ret = get_hot_temp(tz, &trip, &temperature); + if (ret) { + dev_info(dev, "throttrip: %s: missing hot temperature\n", + sg->name); + return 0; + } + + for (i = 0; i < THROTTLE_OC1; i++) { + struct thermal_cooling_device *cdev; + + if (!ts->throt_cfgs[i].init) + continue; + + cdev = ts->throt_cfgs[i].cdev; + if (get_thermal_instance(tz, cdev, trip)) + stc = find_throttle_cfg_by_name(ts, cdev->type); + else + continue; + + ret = throttrip_program(dev, sg, stc, temperature); + if (ret) { + dev_err(dev, "throttrip: %s: error during enable\n", + sg->name); + return ret; + } + + dev_info(dev, + "throttrip: will throttle when %s reaches %d mC\n", + sg->name, temperature); + break; + } + + if (i == THROTTLE_SIZE) + dev_info(dev, "throttrip: %s: missing throttle cdev\n", + sg->name); + + return 0; +} + +static irqreturn_t soctherm_thermal_isr(int irq, void *dev_id) +{ + struct tegra_soctherm *ts = dev_id; + u32 r; + + /* Case for no lock: + * Although interrupts are enabled in set_trips, there is still no need + * to lock here because the interrupts are disabled before programming + * new trip points. Hence there cant be a interrupt on the same sensor. + * An interrupt can however occur on a sensor while trips are being + * programmed on a different one. This beign a LEVEL interrupt won't + * cause a new interrupt but this is taken care of by the re-reading of + * the STATUS register in the thread function. + */ + r = readl(ts->regs + THERMCTL_INTR_STATUS); + writel(r, ts->regs + THERMCTL_INTR_DISABLE); + + return IRQ_WAKE_THREAD; +} + +/** + * soctherm_thermal_isr_thread() - Handles a thermal interrupt request + * @irq: The interrupt number being requested; not used + * @dev_id: Opaque pointer to tegra_soctherm; + * + * Clears the interrupt status register if there are expected + * interrupt bits set. + * The interrupt(s) are then handled by updating the corresponding + * thermal zones. + * + * An error is logged if any unexpected interrupt bits are set. + * + * Disabled interrupts are re-enabled. + * + * Return: %IRQ_HANDLED. Interrupt was handled and no further processing + * is needed. + */ +static irqreturn_t soctherm_thermal_isr_thread(int irq, void *dev_id) +{ + struct tegra_soctherm *ts = dev_id; + struct thermal_zone_device *tz; + u32 st, ex = 0, cp = 0, gp = 0, pl = 0, me = 0; + + st = readl(ts->regs + THERMCTL_INTR_STATUS); + + /* deliberately clear expected interrupts handled in SW */ + cp |= st & TH_INTR_CD0_MASK; + cp |= st & TH_INTR_CU0_MASK; + + gp |= st & TH_INTR_GD0_MASK; + gp |= st & TH_INTR_GU0_MASK; + + pl |= st & TH_INTR_PD0_MASK; + pl |= st & TH_INTR_PU0_MASK; + + me |= st & TH_INTR_MD0_MASK; + me |= st & TH_INTR_MU0_MASK; + + ex |= cp | gp | pl | me; + if (ex) { + writel(ex, ts->regs + THERMCTL_INTR_STATUS); + st &= ~ex; + + if (cp) { + tz = ts->thermctl_tzs[TEGRA124_SOCTHERM_SENSOR_CPU]; + thermal_zone_device_update(tz, + THERMAL_EVENT_UNSPECIFIED); + } + + if (gp) { + tz = ts->thermctl_tzs[TEGRA124_SOCTHERM_SENSOR_GPU]; + thermal_zone_device_update(tz, + THERMAL_EVENT_UNSPECIFIED); + } + + if (pl) { + tz = ts->thermctl_tzs[TEGRA124_SOCTHERM_SENSOR_PLLX]; + thermal_zone_device_update(tz, + THERMAL_EVENT_UNSPECIFIED); + } + + if (me) { + tz = ts->thermctl_tzs[TEGRA124_SOCTHERM_SENSOR_MEM]; + thermal_zone_device_update(tz, + THERMAL_EVENT_UNSPECIFIED); + } + } + + /* deliberately ignore expected interrupts NOT handled in SW */ + ex |= TH_INTR_IGNORE_MASK; + st &= ~ex; + + if (st) { + /* Whine about any other unexpected INTR bits still set */ + pr_err("soctherm: Ignored unexpected INTRs 0x%08x\n", st); + writel(st, ts->regs + THERMCTL_INTR_STATUS); + } + + return IRQ_HANDLED; +} + +/** + * soctherm_oc_intr_enable() - Enables the soctherm over-current interrupt + * @ts: pointer to a struct tegra_soctherm + * @alarm: The soctherm throttle id + * @enable: Flag indicating enable the soctherm over-current + * interrupt or disable it + * + * Enables a specific over-current pins @alarm to raise an interrupt if the flag + * is set and the alarm corresponds to OC1, OC2, OC3, or OC4. + */ +static void soctherm_oc_intr_enable(struct tegra_soctherm *ts, + enum soctherm_throttle_id alarm, + bool enable) +{ + u32 r; + + if (!enable) + return; + + r = readl(ts->regs + OC_INTR_ENABLE); + switch (alarm) { + case THROTTLE_OC1: + r = REG_SET_MASK(r, OC_INTR_OC1_MASK, 1); + break; + case THROTTLE_OC2: + r = REG_SET_MASK(r, OC_INTR_OC2_MASK, 1); + break; + case THROTTLE_OC3: + r = REG_SET_MASK(r, OC_INTR_OC3_MASK, 1); + break; + case THROTTLE_OC4: + r = REG_SET_MASK(r, OC_INTR_OC4_MASK, 1); + break; + default: + r = 0; + break; + } + writel(r, ts->regs + OC_INTR_ENABLE); +} + +/** + * soctherm_handle_alarm() - Handles soctherm alarms + * @alarm: The soctherm throttle id + * + * "Handles" over-current alarms (OC1, OC2, OC3, and OC4) by printing + * a warning or informative message. + * + * Return: -EINVAL for @alarm = THROTTLE_OC3, otherwise 0 (success). + */ +static int soctherm_handle_alarm(enum soctherm_throttle_id alarm) +{ + int rv = -EINVAL; + + switch (alarm) { + case THROTTLE_OC1: + pr_debug("soctherm: Successfully handled OC1 alarm\n"); + rv = 0; + break; + + case THROTTLE_OC2: + pr_debug("soctherm: Successfully handled OC2 alarm\n"); + rv = 0; + break; + + case THROTTLE_OC3: + pr_debug("soctherm: Successfully handled OC3 alarm\n"); + rv = 0; + break; + + case THROTTLE_OC4: + pr_debug("soctherm: Successfully handled OC4 alarm\n"); + rv = 0; + break; + + default: + break; + } + + if (rv) + pr_err("soctherm: ERROR in handling %s alarm\n", + throt_names[alarm]); + + return rv; +} + +/** + * soctherm_edp_isr_thread() - log an over-current interrupt request + * @irq: OC irq number. Currently not being used. See description + * @arg: a void pointer for callback, currently not being used + * + * Over-current events are handled in hardware. This function is called to log + * and handle any OC events that happened. Additionally, it checks every + * over-current interrupt registers for registers are set but + * was not expected (i.e. any discrepancy in interrupt status) by the function, + * the discrepancy will logged. + * + * Return: %IRQ_HANDLED + */ +static irqreturn_t soctherm_edp_isr_thread(int irq, void *arg) +{ + struct tegra_soctherm *ts = arg; + u32 st, ex, oc1, oc2, oc3, oc4; + + st = readl(ts->regs + OC_INTR_STATUS); + + /* deliberately clear expected interrupts handled in SW */ + oc1 = st & OC_INTR_OC1_MASK; + oc2 = st & OC_INTR_OC2_MASK; + oc3 = st & OC_INTR_OC3_MASK; + oc4 = st & OC_INTR_OC4_MASK; + ex = oc1 | oc2 | oc3 | oc4; + + pr_err("soctherm: OC ALARM 0x%08x\n", ex); + if (ex) { + writel(st, ts->regs + OC_INTR_STATUS); + st &= ~ex; + + if (oc1 && !soctherm_handle_alarm(THROTTLE_OC1)) + soctherm_oc_intr_enable(ts, THROTTLE_OC1, true); + + if (oc2 && !soctherm_handle_alarm(THROTTLE_OC2)) + soctherm_oc_intr_enable(ts, THROTTLE_OC2, true); + + if (oc3 && !soctherm_handle_alarm(THROTTLE_OC3)) + soctherm_oc_intr_enable(ts, THROTTLE_OC3, true); + + if (oc4 && !soctherm_handle_alarm(THROTTLE_OC4)) + soctherm_oc_intr_enable(ts, THROTTLE_OC4, true); + + if (oc1 && soc_irq_cdata.irq_enable & BIT(0)) + handle_nested_irq( + irq_find_mapping(soc_irq_cdata.domain, 0)); + + if (oc2 && soc_irq_cdata.irq_enable & BIT(1)) + handle_nested_irq( + irq_find_mapping(soc_irq_cdata.domain, 1)); + + if (oc3 && soc_irq_cdata.irq_enable & BIT(2)) + handle_nested_irq( + irq_find_mapping(soc_irq_cdata.domain, 2)); + + if (oc4 && soc_irq_cdata.irq_enable & BIT(3)) + handle_nested_irq( + irq_find_mapping(soc_irq_cdata.domain, 3)); + } + + if (st) { + pr_err("soctherm: Ignored unexpected OC ALARM 0x%08x\n", st); + writel(st, ts->regs + OC_INTR_STATUS); + } + + return IRQ_HANDLED; +} + +/** + * soctherm_edp_isr() - Disables any active interrupts + * @irq: The interrupt request number + * @arg: Opaque pointer to an argument + * + * Writes to the OC_INTR_DISABLE register the over current interrupt status, + * masking any asserted interrupts. Doing this prevents the same interrupts + * from triggering this isr repeatedly. The thread woken by this isr will + * handle asserted interrupts and subsequently unmask/re-enable them. + * + * The OC_INTR_DISABLE register indicates which OC interrupts + * have been disabled. + * + * Return: %IRQ_WAKE_THREAD, handler requests to wake the handler thread + */ +static irqreturn_t soctherm_edp_isr(int irq, void *arg) +{ + struct tegra_soctherm *ts = arg; + u32 r; + + if (!ts) + return IRQ_NONE; + + r = readl(ts->regs + OC_INTR_STATUS); + writel(r, ts->regs + OC_INTR_DISABLE); + + return IRQ_WAKE_THREAD; +} + +/** + * soctherm_oc_irq_lock() - locks the over-current interrupt request + * @data: Interrupt request data + * + * Looks up the chip data from @data and locks the mutex associated with + * a particular over-current interrupt request. + */ +static void soctherm_oc_irq_lock(struct irq_data *data) +{ + struct soctherm_oc_irq_chip_data *d = irq_data_get_irq_chip_data(data); + + mutex_lock(&d->irq_lock); +} + +/** + * soctherm_oc_irq_sync_unlock() - Unlocks the OC interrupt request + * @data: Interrupt request data + * + * Looks up the interrupt request data @data and unlocks the mutex associated + * with a particular over-current interrupt request. + */ +static void soctherm_oc_irq_sync_unlock(struct irq_data *data) +{ + struct soctherm_oc_irq_chip_data *d = irq_data_get_irq_chip_data(data); + + mutex_unlock(&d->irq_lock); +} + +/** + * soctherm_oc_irq_enable() - Enables the SOC_THERM over-current interrupt queue + * @data: irq_data structure of the chip + * + * Sets the irq_enable bit of SOC_THERM allowing SOC_THERM + * to respond to over-current interrupts. + * + */ +static void soctherm_oc_irq_enable(struct irq_data *data) +{ + struct soctherm_oc_irq_chip_data *d = irq_data_get_irq_chip_data(data); + + d->irq_enable |= BIT(data->hwirq); +} + +/** + * soctherm_oc_irq_disable() - Disables overcurrent interrupt requests + * @data: The interrupt request information + * + * Clears the interrupt request enable bit of the overcurrent + * interrupt request chip data. + * + * Return: Nothing is returned (void) + */ +static void soctherm_oc_irq_disable(struct irq_data *data) +{ + struct soctherm_oc_irq_chip_data *d = irq_data_get_irq_chip_data(data); + + d->irq_enable &= ~BIT(data->hwirq); +} + +static int soctherm_oc_irq_set_type(struct irq_data *data, unsigned int type) +{ + return 0; +} + +/** + * soctherm_oc_irq_map() - SOC_THERM interrupt request domain mapper + * @h: Interrupt request domain + * @virq: Virtual interrupt request number + * @hw: Hardware interrupt request number + * + * Mapping callback function for SOC_THERM's irq_domain. When a SOC_THERM + * interrupt request is called, the irq_domain takes the request's virtual + * request number (much like a virtual memory address) and maps it to a + * physical hardware request number. + * + * When a mapping doesn't already exist for a virtual request number, the + * irq_domain calls this function to associate the virtual request number with + * a hardware request number. + * + * Return: 0 + */ +static int soctherm_oc_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct soctherm_oc_irq_chip_data *data = h->host_data; + + irq_set_chip_data(virq, data); + irq_set_chip(virq, &data->irq_chip); + irq_set_nested_thread(virq, 1); + return 0; +} + +/** + * soctherm_irq_domain_xlate_twocell() - xlate for soctherm interrupts + * @d: Interrupt request domain + * @ctrlr: Controller device tree node + * @intspec: Array of u32s from DTs "interrupt" property + * @intsize: Number of values inside the intspec array + * @out_hwirq: HW IRQ value associated with this interrupt + * @out_type: The IRQ SENSE type for this interrupt. + * + * This Device Tree IRQ specifier translation function will translate a + * specific "interrupt" as defined by 2 DT values where the cell values map + * the hwirq number + 1 and linux irq flags. Since the output is the hwirq + * number, this function will subtract 1 from the value listed in DT. + * + * Return: 0 + */ +static int soctherm_irq_domain_xlate_twocell(struct irq_domain *d, + struct device_node *ctrlr, const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, unsigned int *out_type) +{ + if (WARN_ON(intsize < 2)) + return -EINVAL; + + /* + * The HW value is 1 index less than the DT IRQ values. + * i.e. OC4 goes to HW index 3. + */ + *out_hwirq = intspec[0] - 1; + *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK; + return 0; +} + +static const struct irq_domain_ops soctherm_oc_domain_ops = { + .map = soctherm_oc_irq_map, + .xlate = soctherm_irq_domain_xlate_twocell, +}; + +/** + * soctherm_oc_int_init() - Initial enabling of the over + * current interrupts + * @np: The devicetree node for soctherm + * @num_irqs: The number of new interrupt requests + * + * Sets the over current interrupt request chip data + * + * Return: 0 on success or if overcurrent interrupts are not enabled, + * -ENOMEM (out of memory), or irq_base if the function failed to + * allocate the irqs + */ +static int soctherm_oc_int_init(struct device_node *np, int num_irqs) +{ + if (!num_irqs) { + pr_info("%s(): OC interrupts are not enabled\n", __func__); + return 0; + } + + mutex_init(&soc_irq_cdata.irq_lock); + soc_irq_cdata.irq_enable = 0; + + soc_irq_cdata.irq_chip.name = "soc_therm_oc"; + soc_irq_cdata.irq_chip.irq_bus_lock = soctherm_oc_irq_lock; + soc_irq_cdata.irq_chip.irq_bus_sync_unlock = + soctherm_oc_irq_sync_unlock; + soc_irq_cdata.irq_chip.irq_disable = soctherm_oc_irq_disable; + soc_irq_cdata.irq_chip.irq_enable = soctherm_oc_irq_enable; + soc_irq_cdata.irq_chip.irq_set_type = soctherm_oc_irq_set_type; + soc_irq_cdata.irq_chip.irq_set_wake = NULL; + + soc_irq_cdata.domain = irq_domain_add_linear(np, num_irqs, + &soctherm_oc_domain_ops, + &soc_irq_cdata); + + if (!soc_irq_cdata.domain) { + pr_err("%s: Failed to create IRQ domain\n", __func__); + return -ENOMEM; + } + + pr_debug("%s(): OC interrupts enabled successful\n", __func__); + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static int regs_show(struct seq_file *s, void *data) +{ + struct platform_device *pdev = s->private; + struct tegra_soctherm *ts = platform_get_drvdata(pdev); + const struct tegra_tsensor *tsensors = ts->soc->tsensors; + const struct tegra_tsensor_group **ttgs = ts->soc->ttgs; + u32 r, state; + int i, level; + + seq_puts(s, "-----TSENSE (convert HW)-----\n"); + + for (i = 0; i < ts->soc->num_tsensors; i++) { + r = readl(ts->regs + tsensors[i].base + SENSOR_CONFIG1); + state = REG_GET_MASK(r, SENSOR_CONFIG1_TEMP_ENABLE); + + seq_printf(s, "%s: ", tsensors[i].name); + seq_printf(s, "En(%d) ", state); + + if (!state) { + seq_puts(s, "\n"); + continue; + } + + state = REG_GET_MASK(r, SENSOR_CONFIG1_TIDDQ_EN_MASK); + seq_printf(s, "tiddq(%d) ", state); + state = REG_GET_MASK(r, SENSOR_CONFIG1_TEN_COUNT_MASK); + seq_printf(s, "ten_count(%d) ", state); + state = REG_GET_MASK(r, SENSOR_CONFIG1_TSAMPLE_MASK); + seq_printf(s, "tsample(%d) ", state + 1); + + r = readl(ts->regs + tsensors[i].base + SENSOR_STATUS1); + state = REG_GET_MASK(r, SENSOR_STATUS1_TEMP_VALID_MASK); + seq_printf(s, "Temp(%d/", state); + state = REG_GET_MASK(r, SENSOR_STATUS1_TEMP_MASK); + seq_printf(s, "%d) ", translate_temp(state)); + + r = readl(ts->regs + tsensors[i].base + SENSOR_STATUS0); + state = REG_GET_MASK(r, SENSOR_STATUS0_VALID_MASK); + seq_printf(s, "Capture(%d/", state); + state = REG_GET_MASK(r, SENSOR_STATUS0_CAPTURE_MASK); + seq_printf(s, "%d) ", state); + + r = readl(ts->regs + tsensors[i].base + SENSOR_CONFIG0); + state = REG_GET_MASK(r, SENSOR_CONFIG0_STOP); + seq_printf(s, "Stop(%d) ", state); + state = REG_GET_MASK(r, SENSOR_CONFIG0_TALL_MASK); + seq_printf(s, "Tall(%d) ", state); + state = REG_GET_MASK(r, SENSOR_CONFIG0_TCALC_OVER); + seq_printf(s, "Over(%d/", state); + state = REG_GET_MASK(r, SENSOR_CONFIG0_OVER); + seq_printf(s, "%d/", state); + state = REG_GET_MASK(r, SENSOR_CONFIG0_CPTR_OVER); + seq_printf(s, "%d) ", state); + + r = readl(ts->regs + tsensors[i].base + SENSOR_CONFIG2); + state = REG_GET_MASK(r, SENSOR_CONFIG2_THERMA_MASK); + seq_printf(s, "Therm_A/B(%d/", state); + state = REG_GET_MASK(r, SENSOR_CONFIG2_THERMB_MASK); + seq_printf(s, "%d)\n", (s16)state); + } + + r = readl(ts->regs + SENSOR_PDIV); + seq_printf(s, "PDIV: 0x%x\n", r); + + r = readl(ts->regs + SENSOR_HOTSPOT_OFF); + seq_printf(s, "HOTSPOT: 0x%x\n", r); + + seq_puts(s, "\n"); + seq_puts(s, "-----SOC_THERM-----\n"); + + r = readl(ts->regs + SENSOR_TEMP1); + state = REG_GET_MASK(r, SENSOR_TEMP1_CPU_TEMP_MASK); + seq_printf(s, "Temperatures: CPU(%d) ", translate_temp(state)); + state = REG_GET_MASK(r, SENSOR_TEMP1_GPU_TEMP_MASK); + seq_printf(s, " GPU(%d) ", translate_temp(state)); + r = readl(ts->regs + SENSOR_TEMP2); + state = REG_GET_MASK(r, SENSOR_TEMP2_PLLX_TEMP_MASK); + seq_printf(s, " PLLX(%d) ", translate_temp(state)); + state = REG_GET_MASK(r, SENSOR_TEMP2_MEM_TEMP_MASK); + seq_printf(s, " MEM(%d)\n", translate_temp(state)); + + for (i = 0; i < ts->soc->num_ttgs; i++) { + seq_printf(s, "%s:\n", ttgs[i]->name); + for (level = 0; level < 4; level++) { + s32 v; + u32 mask; + u16 off = ttgs[i]->thermctl_lvl0_offset; + + r = readl(ts->regs + THERMCTL_LVL_REG(off, level)); + + mask = ttgs[i]->thermctl_lvl0_up_thresh_mask; + state = REG_GET_MASK(r, mask); + v = sign_extend32(state, ts->soc->bptt - 1); + v *= ts->soc->thresh_grain; + seq_printf(s, " %d: Up/Dn(%d /", level, v); + + mask = ttgs[i]->thermctl_lvl0_dn_thresh_mask; + state = REG_GET_MASK(r, mask); + v = sign_extend32(state, ts->soc->bptt - 1); + v *= ts->soc->thresh_grain; + seq_printf(s, "%d ) ", v); + + mask = THERMCTL_LVL0_CPU0_EN_MASK; + state = REG_GET_MASK(r, mask); + seq_printf(s, "En(%d) ", state); + + mask = THERMCTL_LVL0_CPU0_CPU_THROT_MASK; + state = REG_GET_MASK(r, mask); + seq_puts(s, "CPU Throt"); + if (!state) + seq_printf(s, "(%s) ", "none"); + else if (state == THERMCTL_LVL0_CPU0_CPU_THROT_LIGHT) + seq_printf(s, "(%s) ", "L"); + else if (state == THERMCTL_LVL0_CPU0_CPU_THROT_HEAVY) + seq_printf(s, "(%s) ", "H"); + else + seq_printf(s, "(%s) ", "H+L"); + + mask = THERMCTL_LVL0_CPU0_GPU_THROT_MASK; + state = REG_GET_MASK(r, mask); + seq_puts(s, "GPU Throt"); + if (!state) + seq_printf(s, "(%s) ", "none"); + else if (state == THERMCTL_LVL0_CPU0_GPU_THROT_LIGHT) + seq_printf(s, "(%s) ", "L"); + else if (state == THERMCTL_LVL0_CPU0_GPU_THROT_HEAVY) + seq_printf(s, "(%s) ", "H"); + else + seq_printf(s, "(%s) ", "H+L"); + + mask = THERMCTL_LVL0_CPU0_STATUS_MASK; + state = REG_GET_MASK(r, mask); + seq_printf(s, "Status(%s)\n", + state == 0 ? "LO" : + state == 1 ? "In" : + state == 2 ? "Res" : "HI"); + } + } + + r = readl(ts->regs + THERMCTL_STATS_CTL); + seq_printf(s, "STATS: Up(%s) Dn(%s)\n", + r & STATS_CTL_EN_UP ? "En" : "--", + r & STATS_CTL_EN_DN ? "En" : "--"); + + for (level = 0; level < 4; level++) { + u16 off; + + off = THERMCTL_LVL0_UP_STATS; + r = readl(ts->regs + THERMCTL_LVL_REG(off, level)); + seq_printf(s, " Level_%d Up(%d) ", level, r); + + off = THERMCTL_LVL0_DN_STATS; + r = readl(ts->regs + THERMCTL_LVL_REG(off, level)); + seq_printf(s, "Dn(%d)\n", r); + } + + r = readl(ts->regs + THERMCTL_THERMTRIP_CTL); + state = REG_GET_MASK(r, ttgs[0]->thermtrip_any_en_mask); + seq_printf(s, "Thermtrip Any En(%d)\n", state); + for (i = 0; i < ts->soc->num_ttgs; i++) { + state = REG_GET_MASK(r, ttgs[i]->thermtrip_enable_mask); + seq_printf(s, " %s En(%d) ", ttgs[i]->name, state); + state = REG_GET_MASK(r, ttgs[i]->thermtrip_threshold_mask); + state *= ts->soc->thresh_grain; + seq_printf(s, "Thresh(%d)\n", state); + } + + r = readl(ts->regs + THROT_GLOBAL_CFG); + seq_puts(s, "\n"); + seq_printf(s, "GLOBAL THROTTLE CONFIG: 0x%08x\n", r); + + seq_puts(s, "---------------------------------------------------\n"); + r = readl(ts->regs + THROT_STATUS); + state = REG_GET_MASK(r, THROT_STATUS_BREACH_MASK); + seq_printf(s, "THROT STATUS: breach(%d) ", state); + state = REG_GET_MASK(r, THROT_STATUS_STATE_MASK); + seq_printf(s, "state(%d) ", state); + state = REG_GET_MASK(r, THROT_STATUS_ENABLED_MASK); + seq_printf(s, "enabled(%d)\n", state); + + r = readl(ts->regs + CPU_PSKIP_STATUS); + if (ts->soc->use_ccroc) { + state = REG_GET_MASK(r, XPU_PSKIP_STATUS_ENABLED_MASK); + seq_printf(s, "CPU PSKIP STATUS: enabled(%d)\n", state); + } else { + state = REG_GET_MASK(r, XPU_PSKIP_STATUS_M_MASK); + seq_printf(s, "CPU PSKIP STATUS: M(%d) ", state); + state = REG_GET_MASK(r, XPU_PSKIP_STATUS_N_MASK); + seq_printf(s, "N(%d) ", state); + state = REG_GET_MASK(r, XPU_PSKIP_STATUS_ENABLED_MASK); + seq_printf(s, "enabled(%d)\n", state); + } + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(regs); + +static void soctherm_debug_init(struct platform_device *pdev) +{ + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); + struct dentry *root; + + root = debugfs_create_dir("soctherm", NULL); + + tegra->debugfs_dir = root; + + debugfs_create_file("reg_contents", 0644, root, pdev, ®s_fops); +} +#else +static inline void soctherm_debug_init(struct platform_device *pdev) {} +#endif + +static int soctherm_clk_enable(struct platform_device *pdev, bool enable) +{ + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); + int err; + + if (!tegra->clock_soctherm || !tegra->clock_tsensor) + return -EINVAL; + + reset_control_assert(tegra->reset); + + if (enable) { + err = clk_prepare_enable(tegra->clock_soctherm); + if (err) { + reset_control_deassert(tegra->reset); + return err; + } + + err = clk_prepare_enable(tegra->clock_tsensor); + if (err) { + clk_disable_unprepare(tegra->clock_soctherm); + reset_control_deassert(tegra->reset); + return err; + } + } else { + clk_disable_unprepare(tegra->clock_tsensor); + clk_disable_unprepare(tegra->clock_soctherm); + } + + reset_control_deassert(tegra->reset); + + return 0; +} + +static int throt_get_cdev_max_state(struct thermal_cooling_device *cdev, + unsigned long *max_state) +{ + *max_state = 1; + return 0; +} + +static int throt_get_cdev_cur_state(struct thermal_cooling_device *cdev, + unsigned long *cur_state) +{ + struct tegra_soctherm *ts = cdev->devdata; + u32 r; + + r = readl(ts->regs + THROT_STATUS); + if (REG_GET_MASK(r, THROT_STATUS_STATE_MASK)) + *cur_state = 1; + else + *cur_state = 0; + + return 0; +} + +static int throt_set_cdev_state(struct thermal_cooling_device *cdev, + unsigned long cur_state) +{ + return 0; +} + +static const struct thermal_cooling_device_ops throt_cooling_ops = { + .get_max_state = throt_get_cdev_max_state, + .get_cur_state = throt_get_cdev_cur_state, + .set_cur_state = throt_set_cdev_state, +}; + +static int soctherm_thermtrips_parse(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tegra_soctherm *ts = dev_get_drvdata(dev); + struct tsensor_group_thermtrips *tt = ts->soc->thermtrips; + const int max_num_prop = ts->soc->num_ttgs * 2; + u32 *tlb; + int i, j, n, ret; + + if (!tt) + return -ENOMEM; + + n = of_property_count_u32_elems(dev->of_node, "nvidia,thermtrips"); + if (n <= 0) { + dev_info(dev, + "missing thermtrips, will use critical trips as shut down temp\n"); + return n; + } + + n = min(max_num_prop, n); + + tlb = devm_kcalloc(&pdev->dev, max_num_prop, sizeof(u32), GFP_KERNEL); + if (!tlb) + return -ENOMEM; + ret = of_property_read_u32_array(dev->of_node, "nvidia,thermtrips", + tlb, n); + if (ret) { + dev_err(dev, "invalid num ele: thermtrips:%d\n", ret); + return ret; + } + + i = 0; + for (j = 0; j < n; j = j + 2) { + if (tlb[j] >= TEGRA124_SOCTHERM_SENSOR_NUM) + continue; + + tt[i].id = tlb[j]; + tt[i].temp = tlb[j + 1]; + i++; + } + + return 0; +} + +static void soctherm_oc_cfg_parse(struct device *dev, + struct device_node *np_oc, + struct soctherm_throt_cfg *stc) +{ + u32 val; + + if (of_property_read_bool(np_oc, "nvidia,polarity-active-low")) + stc->oc_cfg.active_low = 1; + else + stc->oc_cfg.active_low = 0; + + if (!of_property_read_u32(np_oc, "nvidia,count-threshold", &val)) { + stc->oc_cfg.intr_en = 1; + stc->oc_cfg.alarm_cnt_thresh = val; + } + + if (!of_property_read_u32(np_oc, "nvidia,throttle-period-us", &val)) + stc->oc_cfg.throt_period = val; + + if (!of_property_read_u32(np_oc, "nvidia,alarm-filter", &val)) + stc->oc_cfg.alarm_filter = val; + + /* BRIEF throttling by default, do not support STICKY */ + stc->oc_cfg.mode = OC_THROTTLE_MODE_BRIEF; +} + +static int soctherm_throt_cfg_parse(struct device *dev, + struct device_node *np, + struct soctherm_throt_cfg *stc) +{ + struct tegra_soctherm *ts = dev_get_drvdata(dev); + int ret; + u32 val; + + ret = of_property_read_u32(np, "nvidia,priority", &val); + if (ret) { + dev_err(dev, "throttle-cfg: %s: invalid priority\n", stc->name); + return -EINVAL; + } + stc->priority = val; + + ret = of_property_read_u32(np, ts->soc->use_ccroc ? + "nvidia,cpu-throt-level" : + "nvidia,cpu-throt-percent", &val); + if (!ret) { + if (ts->soc->use_ccroc && + val <= TEGRA_SOCTHERM_THROT_LEVEL_HIGH) + stc->cpu_throt_level = val; + else if (!ts->soc->use_ccroc && val <= 100) + stc->cpu_throt_depth = val; + else + goto err; + } else { + goto err; + } + + ret = of_property_read_u32(np, "nvidia,gpu-throt-level", &val); + if (!ret && val <= TEGRA_SOCTHERM_THROT_LEVEL_HIGH) + stc->gpu_throt_level = val; + else + goto err; + + return 0; + +err: + dev_err(dev, "throttle-cfg: %s: no throt prop or invalid prop\n", + stc->name); + return -EINVAL; +} + +/** + * soctherm_init_hw_throt_cdev() - Parse the HW throttle configurations + * and register them as cooling devices. + * @pdev: Pointer to platform_device struct + */ +static void soctherm_init_hw_throt_cdev(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tegra_soctherm *ts = dev_get_drvdata(dev); + struct device_node *np_stc, *np_stcc; + const char *name; + int i; + + for (i = 0; i < THROTTLE_SIZE; i++) { + ts->throt_cfgs[i].name = throt_names[i]; + ts->throt_cfgs[i].id = i; + ts->throt_cfgs[i].init = false; + } + + np_stc = of_get_child_by_name(dev->of_node, "throttle-cfgs"); + if (!np_stc) { + dev_info(dev, + "throttle-cfg: no throttle-cfgs - not enabling\n"); + return; + } + + for_each_child_of_node(np_stc, np_stcc) { + struct soctherm_throt_cfg *stc; + struct thermal_cooling_device *tcd; + int err; + + name = np_stcc->name; + stc = find_throttle_cfg_by_name(ts, name); + if (!stc) { + dev_err(dev, + "throttle-cfg: could not find %s\n", name); + continue; + } + + if (stc->init) { + dev_err(dev, "throttle-cfg: %s: redefined!\n", name); + of_node_put(np_stcc); + break; + } + + err = soctherm_throt_cfg_parse(dev, np_stcc, stc); + if (err) + continue; + + if (stc->id >= THROTTLE_OC1) { + soctherm_oc_cfg_parse(dev, np_stcc, stc); + stc->init = true; + } else { + + tcd = thermal_of_cooling_device_register(np_stcc, + (char *)name, ts, + &throt_cooling_ops); + if (IS_ERR_OR_NULL(tcd)) { + dev_err(dev, + "throttle-cfg: %s: failed to register cooling device\n", + name); + continue; + } + stc->cdev = tcd; + stc->init = true; + } + + } + + of_node_put(np_stc); +} + +/** + * throttlectl_cpu_level_cfg() - programs CCROC NV_THERM level config + * @ts: pointer to a struct tegra_soctherm + * @level: describing the level LOW/MED/HIGH of throttling + * + * It's necessary to set up the CPU-local CCROC NV_THERM instance with + * the M/N values desired for each level. This function does this. + * + * This function pre-programs the CCROC NV_THERM levels in terms of + * pre-configured "Low", "Medium" or "Heavy" throttle levels which are + * mapped to THROT_LEVEL_LOW, THROT_LEVEL_MED and THROT_LEVEL_HVY. + */ +static void throttlectl_cpu_level_cfg(struct tegra_soctherm *ts, int level) +{ + u8 depth, dividend; + u32 r; + + switch (level) { + case TEGRA_SOCTHERM_THROT_LEVEL_LOW: + depth = 50; + break; + case TEGRA_SOCTHERM_THROT_LEVEL_MED: + depth = 75; + break; + case TEGRA_SOCTHERM_THROT_LEVEL_HIGH: + depth = 80; + break; + case TEGRA_SOCTHERM_THROT_LEVEL_NONE: + return; + default: + return; + } + + dividend = THROT_DEPTH_DIVIDEND(depth); + + /* setup PSKIP in ccroc nv_therm registers */ + r = ccroc_readl(ts, CCROC_THROT_PSKIP_RAMP_CPU_REG(level)); + r = REG_SET_MASK(r, CCROC_THROT_PSKIP_RAMP_DURATION_MASK, 0xff); + r = REG_SET_MASK(r, CCROC_THROT_PSKIP_RAMP_STEP_MASK, 0xf); + ccroc_writel(ts, r, CCROC_THROT_PSKIP_RAMP_CPU_REG(level)); + + r = ccroc_readl(ts, CCROC_THROT_PSKIP_CTRL_CPU_REG(level)); + r = REG_SET_MASK(r, CCROC_THROT_PSKIP_CTRL_ENB_MASK, 1); + r = REG_SET_MASK(r, CCROC_THROT_PSKIP_CTRL_DIVIDEND_MASK, dividend); + r = REG_SET_MASK(r, CCROC_THROT_PSKIP_CTRL_DIVISOR_MASK, 0xff); + ccroc_writel(ts, r, CCROC_THROT_PSKIP_CTRL_CPU_REG(level)); +} + +/** + * throttlectl_cpu_level_select() - program CPU pulse skipper config + * @ts: pointer to a struct tegra_soctherm + * @throt: the LIGHT/HEAVY of throttle event id + * + * Pulse skippers are used to throttle clock frequencies. This + * function programs the pulse skippers based on @throt and platform + * data. This function is used on SoCs which have CPU-local pulse + * skipper control, such as T13x. It programs soctherm's interface to + * Denver:CCROC NV_THERM in terms of Low, Medium and HIGH throttling + * vectors. PSKIP_BYPASS mode is set as required per HW spec. + */ +static void throttlectl_cpu_level_select(struct tegra_soctherm *ts, + enum soctherm_throttle_id throt) +{ + u32 r, throt_vect; + + /* Denver:CCROC NV_THERM interface N:3 Mapping */ + switch (ts->throt_cfgs[throt].cpu_throt_level) { + case TEGRA_SOCTHERM_THROT_LEVEL_LOW: + throt_vect = THROT_VECT_LOW; + break; + case TEGRA_SOCTHERM_THROT_LEVEL_MED: + throt_vect = THROT_VECT_MED; + break; + case TEGRA_SOCTHERM_THROT_LEVEL_HIGH: + throt_vect = THROT_VECT_HIGH; + break; + default: + throt_vect = THROT_VECT_NONE; + break; + } + + r = readl(ts->regs + THROT_PSKIP_CTRL(throt, THROTTLE_DEV_CPU)); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_ENABLE_MASK, 1); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_VECT_CPU_MASK, throt_vect); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_VECT2_CPU_MASK, throt_vect); + writel(r, ts->regs + THROT_PSKIP_CTRL(throt, THROTTLE_DEV_CPU)); + + /* bypass sequencer in soc_therm as it is programmed in ccroc */ + r = REG_SET_MASK(0, THROT_PSKIP_RAMP_SEQ_BYPASS_MODE_MASK, 1); + writel(r, ts->regs + THROT_PSKIP_RAMP(throt, THROTTLE_DEV_CPU)); +} + +/** + * throttlectl_cpu_mn() - program CPU pulse skipper configuration + * @ts: pointer to a struct tegra_soctherm + * @throt: the LIGHT/HEAVY of throttle event id + * + * Pulse skippers are used to throttle clock frequencies. This + * function programs the pulse skippers based on @throt and platform + * data. This function is used for CPUs that have "remote" pulse + * skipper control, e.g., the CPU pulse skipper is controlled by the + * SOC_THERM IP block. (SOC_THERM is located outside the CPU + * complex.) + */ +static void throttlectl_cpu_mn(struct tegra_soctherm *ts, + enum soctherm_throttle_id throt) +{ + u32 r; + int depth; + u8 dividend; + + depth = ts->throt_cfgs[throt].cpu_throt_depth; + dividend = THROT_DEPTH_DIVIDEND(depth); + + r = readl(ts->regs + THROT_PSKIP_CTRL(throt, THROTTLE_DEV_CPU)); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_ENABLE_MASK, 1); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_DIVIDEND_MASK, dividend); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_DIVISOR_MASK, 0xff); + writel(r, ts->regs + THROT_PSKIP_CTRL(throt, THROTTLE_DEV_CPU)); + + r = readl(ts->regs + THROT_PSKIP_RAMP(throt, THROTTLE_DEV_CPU)); + r = REG_SET_MASK(r, THROT_PSKIP_RAMP_DURATION_MASK, 0xff); + r = REG_SET_MASK(r, THROT_PSKIP_RAMP_STEP_MASK, 0xf); + writel(r, ts->regs + THROT_PSKIP_RAMP(throt, THROTTLE_DEV_CPU)); +} + +/** + * throttlectl_gpu_level_select() - selects throttling level for GPU + * @ts: pointer to a struct tegra_soctherm + * @throt: the LIGHT/HEAVY of throttle event id + * + * This function programs soctherm's interface to GK20a NV_THERM to select + * pre-configured "Low", "Medium" or "Heavy" throttle levels. + * + * Return: boolean true if HW was programmed + */ +static void throttlectl_gpu_level_select(struct tegra_soctherm *ts, + enum soctherm_throttle_id throt) +{ + u32 r, level, throt_vect; + + level = ts->throt_cfgs[throt].gpu_throt_level; + throt_vect = THROT_LEVEL_TO_DEPTH(level); + r = readl(ts->regs + THROT_PSKIP_CTRL(throt, THROTTLE_DEV_GPU)); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_ENABLE_MASK, 1); + r = REG_SET_MASK(r, THROT_PSKIP_CTRL_VECT_GPU_MASK, throt_vect); + writel(r, ts->regs + THROT_PSKIP_CTRL(throt, THROTTLE_DEV_GPU)); +} + +static int soctherm_oc_cfg_program(struct tegra_soctherm *ts, + enum soctherm_throttle_id throt) +{ + u32 r; + struct soctherm_oc_cfg *oc = &ts->throt_cfgs[throt].oc_cfg; + + if (oc->mode == OC_THROTTLE_MODE_DISABLED) + return -EINVAL; + + r = REG_SET_MASK(0, OC1_CFG_HW_RESTORE_MASK, 1); + r = REG_SET_MASK(r, OC1_CFG_THROTTLE_MODE_MASK, oc->mode); + r = REG_SET_MASK(r, OC1_CFG_ALARM_POLARITY_MASK, oc->active_low); + r = REG_SET_MASK(r, OC1_CFG_EN_THROTTLE_MASK, 1); + writel(r, ts->regs + ALARM_CFG(throt)); + writel(oc->throt_period, ts->regs + ALARM_THROTTLE_PERIOD(throt)); + writel(oc->alarm_cnt_thresh, ts->regs + ALARM_CNT_THRESHOLD(throt)); + writel(oc->alarm_filter, ts->regs + ALARM_FILTER(throt)); + soctherm_oc_intr_enable(ts, throt, oc->intr_en); + + return 0; +} + +/** + * soctherm_throttle_program() - programs pulse skippers' configuration + * @ts: pointer to a struct tegra_soctherm + * @throt: the LIGHT/HEAVY of the throttle event id. + * + * Pulse skippers are used to throttle clock frequencies. + * This function programs the pulse skippers. + */ +static void soctherm_throttle_program(struct tegra_soctherm *ts, + enum soctherm_throttle_id throt) +{ + u32 r; + struct soctherm_throt_cfg stc = ts->throt_cfgs[throt]; + + if (!stc.init) + return; + + if ((throt >= THROTTLE_OC1) && (soctherm_oc_cfg_program(ts, throt))) + return; + + /* Setup PSKIP parameters */ + if (ts->soc->use_ccroc) + throttlectl_cpu_level_select(ts, throt); + else + throttlectl_cpu_mn(ts, throt); + + throttlectl_gpu_level_select(ts, throt); + + r = REG_SET_MASK(0, THROT_PRIORITY_LITE_PRIO_MASK, stc.priority); + writel(r, ts->regs + THROT_PRIORITY_CTRL(throt)); + + r = REG_SET_MASK(0, THROT_DELAY_LITE_DELAY_MASK, 0); + writel(r, ts->regs + THROT_DELAY_CTRL(throt)); + + r = readl(ts->regs + THROT_PRIORITY_LOCK); + r = REG_GET_MASK(r, THROT_PRIORITY_LOCK_PRIORITY_MASK); + if (r >= stc.priority) + return; + r = REG_SET_MASK(0, THROT_PRIORITY_LOCK_PRIORITY_MASK, + stc.priority); + writel(r, ts->regs + THROT_PRIORITY_LOCK); +} + +static void tegra_soctherm_throttle(struct device *dev) +{ + struct tegra_soctherm *ts = dev_get_drvdata(dev); + u32 v; + int i; + + /* configure LOW, MED and HIGH levels for CCROC NV_THERM */ + if (ts->soc->use_ccroc) { + throttlectl_cpu_level_cfg(ts, TEGRA_SOCTHERM_THROT_LEVEL_LOW); + throttlectl_cpu_level_cfg(ts, TEGRA_SOCTHERM_THROT_LEVEL_MED); + throttlectl_cpu_level_cfg(ts, TEGRA_SOCTHERM_THROT_LEVEL_HIGH); + } + + /* Thermal HW throttle programming */ + for (i = 0; i < THROTTLE_SIZE; i++) + soctherm_throttle_program(ts, i); + + v = REG_SET_MASK(0, THROT_GLOBAL_ENB_MASK, 1); + if (ts->soc->use_ccroc) { + ccroc_writel(ts, v, CCROC_GLOBAL_CFG); + + v = ccroc_readl(ts, CCROC_SUPER_CCLKG_DIVIDER); + v = REG_SET_MASK(v, CDIVG_USE_THERM_CONTROLS_MASK, 1); + ccroc_writel(ts, v, CCROC_SUPER_CCLKG_DIVIDER); + } else { + writel(v, ts->regs + THROT_GLOBAL_CFG); + + v = readl(ts->clk_regs + CAR_SUPER_CCLKG_DIVIDER); + v = REG_SET_MASK(v, CDIVG_USE_THERM_CONTROLS_MASK, 1); + writel(v, ts->clk_regs + CAR_SUPER_CCLKG_DIVIDER); + } + + /* initialize stats collection */ + v = STATS_CTL_CLR_DN | STATS_CTL_EN_DN | + STATS_CTL_CLR_UP | STATS_CTL_EN_UP; + writel(v, ts->regs + THERMCTL_STATS_CTL); +} + +static int soctherm_interrupts_init(struct platform_device *pdev, + struct tegra_soctherm *tegra) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + + ret = soctherm_oc_int_init(np, TEGRA_SOC_OC_IRQ_MAX); + if (ret < 0) { + dev_err(&pdev->dev, "soctherm_oc_int_init failed\n"); + return ret; + } + + tegra->thermal_irq = platform_get_irq(pdev, 0); + if (tegra->thermal_irq < 0) { + dev_dbg(&pdev->dev, "get 'thermal_irq' failed.\n"); + return 0; + } + + tegra->edp_irq = platform_get_irq(pdev, 1); + if (tegra->edp_irq < 0) { + dev_dbg(&pdev->dev, "get 'edp_irq' failed.\n"); + return 0; + } + + ret = devm_request_threaded_irq(&pdev->dev, + tegra->thermal_irq, + soctherm_thermal_isr, + soctherm_thermal_isr_thread, + IRQF_ONESHOT, + dev_name(&pdev->dev), + tegra); + if (ret < 0) { + dev_err(&pdev->dev, "request_irq 'thermal_irq' failed.\n"); + return ret; + } + + ret = devm_request_threaded_irq(&pdev->dev, + tegra->edp_irq, + soctherm_edp_isr, + soctherm_edp_isr_thread, + IRQF_ONESHOT, + "soctherm_edp", + tegra); + if (ret < 0) { + dev_err(&pdev->dev, "request_irq 'edp_irq' failed.\n"); + return ret; + } + + return 0; +} + +static void soctherm_init(struct platform_device *pdev) +{ + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); + const struct tegra_tsensor_group **ttgs = tegra->soc->ttgs; + int i; + u32 pdiv, hotspot; + + /* Initialize raw sensors */ + for (i = 0; i < tegra->soc->num_tsensors; ++i) + enable_tsensor(tegra, i); + + /* program pdiv and hotspot offsets per THERM */ + pdiv = readl(tegra->regs + SENSOR_PDIV); + hotspot = readl(tegra->regs + SENSOR_HOTSPOT_OFF); + for (i = 0; i < tegra->soc->num_ttgs; ++i) { + pdiv = REG_SET_MASK(pdiv, ttgs[i]->pdiv_mask, + ttgs[i]->pdiv); + /* hotspot offset from PLLX, doesn't need to configure PLLX */ + if (ttgs[i]->id == TEGRA124_SOCTHERM_SENSOR_PLLX) + continue; + hotspot = REG_SET_MASK(hotspot, + ttgs[i]->pllx_hotspot_mask, + ttgs[i]->pllx_hotspot_diff); + } + writel(pdiv, tegra->regs + SENSOR_PDIV); + writel(hotspot, tegra->regs + SENSOR_HOTSPOT_OFF); + + /* Configure hw throttle */ + tegra_soctherm_throttle(&pdev->dev); +} + +static const struct of_device_id tegra_soctherm_of_match[] = { +#ifdef CONFIG_ARCH_TEGRA_124_SOC + { + .compatible = "nvidia,tegra124-soctherm", + .data = &tegra124_soctherm, + }, +#endif +#ifdef CONFIG_ARCH_TEGRA_132_SOC + { + .compatible = "nvidia,tegra132-soctherm", + .data = &tegra132_soctherm, + }, +#endif +#ifdef CONFIG_ARCH_TEGRA_210_SOC + { + .compatible = "nvidia,tegra210-soctherm", + .data = &tegra210_soctherm, + }, +#endif + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_soctherm_of_match); + +static int tegra_soctherm_probe(struct platform_device *pdev) +{ + const struct of_device_id *match; + struct tegra_soctherm *tegra; + struct thermal_zone_device *z; + struct tsensor_shared_calib shared_calib; + struct resource *res; + struct tegra_soctherm_soc *soc; + unsigned int i; + int err; + + match = of_match_node(tegra_soctherm_of_match, pdev->dev.of_node); + if (!match) + return -ENODEV; + + soc = (struct tegra_soctherm_soc *)match->data; + if (soc->num_ttgs > TEGRA124_SOCTHERM_SENSOR_NUM) + return -EINVAL; + + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); + if (!tegra) + return -ENOMEM; + + mutex_init(&tegra->thermctl_lock); + dev_set_drvdata(&pdev->dev, tegra); + + tegra->soc = soc; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "soctherm-reg"); + tegra->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->regs)) { + dev_err(&pdev->dev, "can't get soctherm registers"); + return PTR_ERR(tegra->regs); + } + + if (!tegra->soc->use_ccroc) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "car-reg"); + tegra->clk_regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->clk_regs)) { + dev_err(&pdev->dev, "can't get car clk registers"); + return PTR_ERR(tegra->clk_regs); + } + } else { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "ccroc-reg"); + tegra->ccroc_regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->ccroc_regs)) { + dev_err(&pdev->dev, "can't get ccroc registers"); + return PTR_ERR(tegra->ccroc_regs); + } + } + + tegra->reset = devm_reset_control_get(&pdev->dev, "soctherm"); + if (IS_ERR(tegra->reset)) { + dev_err(&pdev->dev, "can't get soctherm reset\n"); + return PTR_ERR(tegra->reset); + } + + tegra->clock_tsensor = devm_clk_get(&pdev->dev, "tsensor"); + if (IS_ERR(tegra->clock_tsensor)) { + dev_err(&pdev->dev, "can't get tsensor clock\n"); + return PTR_ERR(tegra->clock_tsensor); + } + + tegra->clock_soctherm = devm_clk_get(&pdev->dev, "soctherm"); + if (IS_ERR(tegra->clock_soctherm)) { + dev_err(&pdev->dev, "can't get soctherm clock\n"); + return PTR_ERR(tegra->clock_soctherm); + } + + tegra->calib = devm_kcalloc(&pdev->dev, + soc->num_tsensors, sizeof(u32), + GFP_KERNEL); + if (!tegra->calib) + return -ENOMEM; + + /* calculate shared calibration data */ + err = tegra_calc_shared_calib(soc->tfuse, &shared_calib); + if (err) + return err; + + /* calculate tsensor calibaration data */ + for (i = 0; i < soc->num_tsensors; ++i) { + err = tegra_calc_tsensor_calib(&soc->tsensors[i], + &shared_calib, + &tegra->calib[i]); + if (err) + return err; + } + + tegra->thermctl_tzs = devm_kcalloc(&pdev->dev, + soc->num_ttgs, sizeof(z), + GFP_KERNEL); + if (!tegra->thermctl_tzs) + return -ENOMEM; + + err = soctherm_clk_enable(pdev, true); + if (err) + return err; + + soctherm_thermtrips_parse(pdev); + + soctherm_init_hw_throt_cdev(pdev); + + soctherm_init(pdev); + + for (i = 0; i < soc->num_ttgs; ++i) { + struct tegra_thermctl_zone *zone = + devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); + if (!zone) { + err = -ENOMEM; + goto disable_clocks; + } + + zone->reg = tegra->regs + soc->ttgs[i]->sensor_temp_offset; + zone->dev = &pdev->dev; + zone->sg = soc->ttgs[i]; + zone->ts = tegra; + + z = devm_thermal_zone_of_sensor_register(&pdev->dev, + soc->ttgs[i]->id, zone, + &tegra_of_thermal_ops); + if (IS_ERR(z)) { + err = PTR_ERR(z); + dev_err(&pdev->dev, "failed to register sensor: %d\n", + err); + goto disable_clocks; + } + + zone->tz = z; + tegra->thermctl_tzs[soc->ttgs[i]->id] = z; + + /* Configure hw trip points */ + err = tegra_soctherm_set_hwtrips(&pdev->dev, soc->ttgs[i], z); + if (err) + goto disable_clocks; + } + + err = soctherm_interrupts_init(pdev, tegra); + + soctherm_debug_init(pdev); + + return 0; + +disable_clocks: + soctherm_clk_enable(pdev, false); + + return err; +} + +static int tegra_soctherm_remove(struct platform_device *pdev) +{ + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); + + debugfs_remove_recursive(tegra->debugfs_dir); + + soctherm_clk_enable(pdev, false); + + return 0; +} + +static int __maybe_unused soctherm_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + + soctherm_clk_enable(pdev, false); + + return 0; +} + +static int __maybe_unused soctherm_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); + struct tegra_soctherm_soc *soc = tegra->soc; + int err, i; + + err = soctherm_clk_enable(pdev, true); + if (err) { + dev_err(&pdev->dev, + "Resume failed: enable clocks failed\n"); + return err; + } + + soctherm_init(pdev); + + for (i = 0; i < soc->num_ttgs; ++i) { + struct thermal_zone_device *tz; + + tz = tegra->thermctl_tzs[soc->ttgs[i]->id]; + err = tegra_soctherm_set_hwtrips(dev, soc->ttgs[i], tz); + if (err) { + dev_err(&pdev->dev, + "Resume failed: set hwtrips failed\n"); + return err; + } + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(tegra_soctherm_pm, soctherm_suspend, soctherm_resume); + +static struct platform_driver tegra_soctherm_driver = { + .probe = tegra_soctherm_probe, + .remove = tegra_soctherm_remove, + .driver = { + .name = "tegra_soctherm", + .pm = &tegra_soctherm_pm, + .of_match_table = tegra_soctherm_of_match, + }, +}; +module_platform_driver(tegra_soctherm_driver); + +MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>"); +MODULE_DESCRIPTION("NVIDIA Tegra SOCTHERM thermal management driver"); +MODULE_LICENSE("GPL v2"); |