diff options
Diffstat (limited to 'drivers/thermal/rockchip_thermal.c')
| -rw-r--r-- | drivers/thermal/rockchip_thermal.c | 1411 |
1 files changed, 1411 insertions, 0 deletions
diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c new file mode 100644 index 000000000..f36375d5a --- /dev/null +++ b/drivers/thermal/rockchip_thermal.c @@ -0,0 +1,1411 @@ +/* + * Copyright (c) 2014-2016, Fuzhou Rockchip Electronics Co., Ltd + * Caesar Wang <wxt@rock-chips.com> + * + * 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/clk.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/thermal.h> +#include <linux/mfd/syscon.h> +#include <linux/pinctrl/consumer.h> + +/** + * If the temperature over a period of time High, + * the resulting TSHUT gave CRU module,let it reset the entire chip, + * or via GPIO give PMIC. + */ +enum tshut_mode { + TSHUT_MODE_CRU = 0, + TSHUT_MODE_GPIO, +}; + +/** + * The system Temperature Sensors tshut(tshut) polarity + * the bit 8 is tshut polarity. + * 0: low active, 1: high active + */ +enum tshut_polarity { + TSHUT_LOW_ACTIVE = 0, + TSHUT_HIGH_ACTIVE, +}; + +/** + * The system has two Temperature Sensors. + * sensor0 is for CPU, and sensor1 is for GPU. + */ +enum sensor_id { + SENSOR_CPU = 0, + SENSOR_GPU, +}; + +/** + * The conversion table has the adc value and temperature. + * ADC_DECREMENT: the adc value is of diminishing.(e.g. rk3288_code_table) + * ADC_INCREMENT: the adc value is incremental.(e.g. rk3368_code_table) + */ +enum adc_sort_mode { + ADC_DECREMENT = 0, + ADC_INCREMENT, +}; + +/** + * The max sensors is two in rockchip SoCs. + * Two sensors: CPU and GPU sensor. + */ +#define SOC_MAX_SENSORS 2 + +/** + * struct chip_tsadc_table - hold information about chip-specific differences + * @id: conversion table + * @length: size of conversion table + * @data_mask: mask to apply on data inputs + * @mode: sort mode of this adc variant (incrementing or decrementing) + */ +struct chip_tsadc_table { + const struct tsadc_table *id; + unsigned int length; + u32 data_mask; + enum adc_sort_mode mode; +}; + +/** + * struct rockchip_tsadc_chip - hold the private data of tsadc chip + * @chn_id[SOC_MAX_SENSORS]: the sensor id of chip correspond to the channel + * @chn_num: the channel number of tsadc chip + * @tshut_temp: the hardware-controlled shutdown temperature value + * @tshut_mode: the hardware-controlled shutdown mode (0:CRU 1:GPIO) + * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH) + * @initialize: SoC special initialize tsadc controller method + * @irq_ack: clear the interrupt + * @get_temp: get the temperature + * @set_alarm_temp: set the high temperature interrupt + * @set_tshut_temp: set the hardware-controlled shutdown temperature + * @set_tshut_mode: set the hardware-controlled shutdown mode + * @table: the chip-specific conversion table + */ +struct rockchip_tsadc_chip { + /* The sensor id of chip correspond to the ADC channel */ + int chn_id[SOC_MAX_SENSORS]; + int chn_num; + + /* The hardware-controlled tshut property */ + int tshut_temp; + enum tshut_mode tshut_mode; + enum tshut_polarity tshut_polarity; + + /* Chip-wide methods */ + void (*initialize)(struct regmap *grf, + void __iomem *reg, enum tshut_polarity p); + void (*irq_ack)(void __iomem *reg); + void (*control)(void __iomem *reg, bool on); + + /* Per-sensor methods */ + int (*get_temp)(const struct chip_tsadc_table *table, + int chn, void __iomem *reg, int *temp); + int (*set_alarm_temp)(const struct chip_tsadc_table *table, + int chn, void __iomem *reg, int temp); + int (*set_tshut_temp)(const struct chip_tsadc_table *table, + int chn, void __iomem *reg, int temp); + void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); + + /* Per-table methods */ + struct chip_tsadc_table table; +}; + +/** + * struct rockchip_thermal_sensor - hold the information of thermal sensor + * @thermal: pointer to the platform/configuration data + * @tzd: pointer to a thermal zone + * @id: identifier of the thermal sensor + */ +struct rockchip_thermal_sensor { + struct rockchip_thermal_data *thermal; + struct thermal_zone_device *tzd; + int id; +}; + +/** + * struct rockchip_thermal_data - hold the private data of thermal driver + * @chip: pointer to the platform/configuration data + * @pdev: platform device of thermal + * @reset: the reset controller of tsadc + * @sensors[SOC_MAX_SENSORS]: the thermal sensor + * @clk: the controller clock is divided by the exteral 24MHz + * @pclk: the advanced peripherals bus clock + * @grf: the general register file will be used to do static set by software + * @regs: the base address of tsadc controller + * @tshut_temp: the hardware-controlled shutdown temperature value + * @tshut_mode: the hardware-controlled shutdown mode (0:CRU 1:GPIO) + * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH) + */ +struct rockchip_thermal_data { + const struct rockchip_tsadc_chip *chip; + struct platform_device *pdev; + struct reset_control *reset; + + struct rockchip_thermal_sensor sensors[SOC_MAX_SENSORS]; + + struct clk *clk; + struct clk *pclk; + + struct regmap *grf; + void __iomem *regs; + + int tshut_temp; + enum tshut_mode tshut_mode; + enum tshut_polarity tshut_polarity; +}; + +/** + * TSADC Sensor Register description: + * + * TSADCV2_* are used for RK3288 SoCs, the other chips can reuse it. + * TSADCV3_* are used for newer SoCs than RK3288. (e.g: RK3228, RK3399) + * + */ +#define TSADCV2_USER_CON 0x00 +#define TSADCV2_AUTO_CON 0x04 +#define TSADCV2_INT_EN 0x08 +#define TSADCV2_INT_PD 0x0c +#define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) +#define TSADCV2_COMP_INT(chn) (0x30 + (chn) * 0x04) +#define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04) +#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 +#define TSADCV2_AUTO_PERIOD 0x68 +#define TSADCV2_AUTO_PERIOD_HT 0x6c + +#define TSADCV2_AUTO_EN BIT(0) +#define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn)) +#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) + +#define TSADCV3_AUTO_Q_SEL_EN BIT(1) + +#define TSADCV2_INT_SRC_EN(chn) BIT(chn) +#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn)) +#define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn)) + +#define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8) +#define TSADCV3_INT_PD_CLEAR_MASK ~BIT(16) + +#define TSADCV2_DATA_MASK 0xfff +#define TSADCV3_DATA_MASK 0x3ff + +#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 +#define TSADCV2_AUTO_PERIOD_TIME 250 /* 250ms */ +#define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* 50ms */ +#define TSADCV3_AUTO_PERIOD_TIME 1875 /* 2.5ms */ +#define TSADCV3_AUTO_PERIOD_HT_TIME 1875 /* 2.5ms */ + +#define TSADCV2_USER_INTER_PD_SOC 0x340 /* 13 clocks */ + +#define GRF_SARADC_TESTBIT 0x0e644 +#define GRF_TSADC_TESTBIT_L 0x0e648 +#define GRF_TSADC_TESTBIT_H 0x0e64c + +#define GRF_SARADC_TESTBIT_ON (0x10001 << 2) +#define GRF_TSADC_TESTBIT_H_ON (0x10001 << 2) +#define GRF_TSADC_VCM_EN_L (0x10001 << 7) +#define GRF_TSADC_VCM_EN_H (0x10001 << 7) + +/** + * struct tsadc_table - code to temperature conversion table + * @code: the value of adc channel + * @temp: the temperature + * Note: + * code to temperature mapping of the temperature sensor is a piece wise linear + * curve.Any temperature, code faling between to 2 give temperatures can be + * linearly interpolated. + * Code to Temperature mapping should be updated based on manufacturer results. + */ +struct tsadc_table { + u32 code; + int temp; +}; + +static const struct tsadc_table rv1108_table[] = { + {0, -40000}, + {374, -40000}, + {382, -35000}, + {389, -30000}, + {397, -25000}, + {405, -20000}, + {413, -15000}, + {421, -10000}, + {429, -5000}, + {436, 0}, + {444, 5000}, + {452, 10000}, + {460, 15000}, + {468, 20000}, + {476, 25000}, + {483, 30000}, + {491, 35000}, + {499, 40000}, + {507, 45000}, + {515, 50000}, + {523, 55000}, + {531, 60000}, + {539, 65000}, + {547, 70000}, + {555, 75000}, + {562, 80000}, + {570, 85000}, + {578, 90000}, + {586, 95000}, + {594, 100000}, + {602, 105000}, + {610, 110000}, + {618, 115000}, + {626, 120000}, + {634, 125000}, + {TSADCV2_DATA_MASK, 125000}, +}; + +static const struct tsadc_table rk3228_code_table[] = { + {0, -40000}, + {588, -40000}, + {593, -35000}, + {598, -30000}, + {603, -25000}, + {608, -20000}, + {613, -15000}, + {618, -10000}, + {623, -5000}, + {629, 0}, + {634, 5000}, + {639, 10000}, + {644, 15000}, + {649, 20000}, + {654, 25000}, + {660, 30000}, + {665, 35000}, + {670, 40000}, + {675, 45000}, + {681, 50000}, + {686, 55000}, + {691, 60000}, + {696, 65000}, + {702, 70000}, + {707, 75000}, + {712, 80000}, + {717, 85000}, + {723, 90000}, + {728, 95000}, + {733, 100000}, + {738, 105000}, + {744, 110000}, + {749, 115000}, + {754, 120000}, + {760, 125000}, + {TSADCV2_DATA_MASK, 125000}, +}; + +static const struct tsadc_table rk3288_code_table[] = { + {TSADCV2_DATA_MASK, -40000}, + {3800, -40000}, + {3792, -35000}, + {3783, -30000}, + {3774, -25000}, + {3765, -20000}, + {3756, -15000}, + {3747, -10000}, + {3737, -5000}, + {3728, 0}, + {3718, 5000}, + {3708, 10000}, + {3698, 15000}, + {3688, 20000}, + {3678, 25000}, + {3667, 30000}, + {3656, 35000}, + {3645, 40000}, + {3634, 45000}, + {3623, 50000}, + {3611, 55000}, + {3600, 60000}, + {3588, 65000}, + {3575, 70000}, + {3563, 75000}, + {3550, 80000}, + {3537, 85000}, + {3524, 90000}, + {3510, 95000}, + {3496, 100000}, + {3482, 105000}, + {3467, 110000}, + {3452, 115000}, + {3437, 120000}, + {3421, 125000}, + {0, 125000}, +}; + +static const struct tsadc_table rk3328_code_table[] = { + {0, -40000}, + {296, -40000}, + {304, -35000}, + {313, -30000}, + {331, -20000}, + {340, -15000}, + {349, -10000}, + {359, -5000}, + {368, 0}, + {378, 5000}, + {388, 10000}, + {398, 15000}, + {408, 20000}, + {418, 25000}, + {429, 30000}, + {440, 35000}, + {451, 40000}, + {462, 45000}, + {473, 50000}, + {485, 55000}, + {496, 60000}, + {508, 65000}, + {521, 70000}, + {533, 75000}, + {546, 80000}, + {559, 85000}, + {572, 90000}, + {586, 95000}, + {600, 100000}, + {614, 105000}, + {629, 110000}, + {644, 115000}, + {659, 120000}, + {675, 125000}, + {TSADCV2_DATA_MASK, 125000}, +}; + +static const struct tsadc_table rk3368_code_table[] = { + {0, -40000}, + {106, -40000}, + {108, -35000}, + {110, -30000}, + {112, -25000}, + {114, -20000}, + {116, -15000}, + {118, -10000}, + {120, -5000}, + {122, 0}, + {124, 5000}, + {126, 10000}, + {128, 15000}, + {130, 20000}, + {132, 25000}, + {134, 30000}, + {136, 35000}, + {138, 40000}, + {140, 45000}, + {142, 50000}, + {144, 55000}, + {146, 60000}, + {148, 65000}, + {150, 70000}, + {152, 75000}, + {154, 80000}, + {156, 85000}, + {158, 90000}, + {160, 95000}, + {162, 100000}, + {163, 105000}, + {165, 110000}, + {167, 115000}, + {169, 120000}, + {171, 125000}, + {TSADCV3_DATA_MASK, 125000}, +}; + +static const struct tsadc_table rk3399_code_table[] = { + {0, -40000}, + {402, -40000}, + {410, -35000}, + {419, -30000}, + {427, -25000}, + {436, -20000}, + {444, -15000}, + {453, -10000}, + {461, -5000}, + {470, 0}, + {478, 5000}, + {487, 10000}, + {496, 15000}, + {504, 20000}, + {513, 25000}, + {521, 30000}, + {530, 35000}, + {538, 40000}, + {547, 45000}, + {555, 50000}, + {564, 55000}, + {573, 60000}, + {581, 65000}, + {590, 70000}, + {599, 75000}, + {607, 80000}, + {616, 85000}, + {624, 90000}, + {633, 95000}, + {642, 100000}, + {650, 105000}, + {659, 110000}, + {668, 115000}, + {677, 120000}, + {685, 125000}, + {TSADCV3_DATA_MASK, 125000}, +}; + +static u32 rk_tsadcv2_temp_to_code(const struct chip_tsadc_table *table, + int temp) +{ + int high, low, mid; + unsigned long num; + unsigned int denom; + u32 error = table->data_mask; + + low = 0; + high = (table->length - 1) - 1; /* ignore the last check for table */ + mid = (high + low) / 2; + + /* Return mask code data when the temp is over table range */ + if (temp < table->id[low].temp || temp > table->id[high].temp) + goto exit; + + while (low <= high) { + if (temp == table->id[mid].temp) + return table->id[mid].code; + else if (temp < table->id[mid].temp) + high = mid - 1; + else + low = mid + 1; + mid = (low + high) / 2; + } + + /* + * The conversion code granularity provided by the table. Let's + * assume that the relationship between temperature and + * analog value between 2 table entries is linear and interpolate + * to produce less granular result. + */ + num = abs(table->id[mid + 1].code - table->id[mid].code); + num *= temp - table->id[mid].temp; + denom = table->id[mid + 1].temp - table->id[mid].temp; + + switch (table->mode) { + case ADC_DECREMENT: + return table->id[mid].code - (num / denom); + case ADC_INCREMENT: + return table->id[mid].code + (num / denom); + default: + pr_err("%s: unknown table mode: %d\n", __func__, table->mode); + return error; + } + +exit: + pr_err("%s: invalid temperature, temp=%d error=%d\n", + __func__, temp, error); + return error; +} + +static int rk_tsadcv2_code_to_temp(const struct chip_tsadc_table *table, + u32 code, int *temp) +{ + unsigned int low = 1; + unsigned int high = table->length - 1; + unsigned int mid = (low + high) / 2; + unsigned int num; + unsigned long denom; + + WARN_ON(table->length < 2); + + switch (table->mode) { + case ADC_DECREMENT: + code &= table->data_mask; + if (code <= table->id[high].code) + return -EAGAIN; /* Incorrect reading */ + + while (low <= high) { + if (code >= table->id[mid].code && + code < table->id[mid - 1].code) + break; + else if (code < table->id[mid].code) + low = mid + 1; + else + high = mid - 1; + + mid = (low + high) / 2; + } + break; + case ADC_INCREMENT: + code &= table->data_mask; + if (code < table->id[low].code) + return -EAGAIN; /* Incorrect reading */ + + while (low <= high) { + if (code <= table->id[mid].code && + code > table->id[mid - 1].code) + break; + else if (code > table->id[mid].code) + low = mid + 1; + else + high = mid - 1; + + mid = (low + high) / 2; + } + break; + default: + pr_err("%s: unknown table mode: %d\n", __func__, table->mode); + return -EINVAL; + } + + /* + * The 5C granularity provided by the table is too much. Let's + * assume that the relationship between sensor readings and + * temperature between 2 table entries is linear and interpolate + * to produce less granular result. + */ + num = table->id[mid].temp - table->id[mid - 1].temp; + num *= abs(table->id[mid - 1].code - code); + denom = abs(table->id[mid - 1].code - table->id[mid].code); + *temp = table->id[mid - 1].temp + (num / denom); + + return 0; +} + +/** + * rk_tsadcv2_initialize - initialize TASDC Controller. + * + * (1) Set TSADC_V2_AUTO_PERIOD: + * Configure the interleave between every two accessing of + * TSADC in normal operation. + * + * (2) Set TSADCV2_AUTO_PERIOD_HT: + * Configure the interleave between every two accessing of + * TSADC after the temperature is higher than COM_SHUT or COM_INT. + * + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE: + * If the temperature is higher than COMP_INT or COMP_SHUT for + * "debounce" times, TSADC controller will generate interrupt or TSHUT. + */ +static void rk_tsadcv2_initialize(struct regmap *grf, void __iomem *regs, + enum tshut_polarity tshut_polarity) +{ + if (tshut_polarity == TSHUT_HIGH_ACTIVE) + writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, + regs + TSADCV2_AUTO_CON); + else + writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH, + regs + TSADCV2_AUTO_CON); + + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_INT_DEBOUNCE); + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, + regs + TSADCV2_AUTO_PERIOD_HT); + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); +} + +/** + * rk_tsadcv3_initialize - initialize TASDC Controller. + * + * (1) The tsadc control power sequence. + * + * (2) Set TSADC_V2_AUTO_PERIOD: + * Configure the interleave between every two accessing of + * TSADC in normal operation. + * + * (2) Set TSADCV2_AUTO_PERIOD_HT: + * Configure the interleave between every two accessing of + * TSADC after the temperature is higher than COM_SHUT or COM_INT. + * + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE: + * If the temperature is higher than COMP_INT or COMP_SHUT for + * "debounce" times, TSADC controller will generate interrupt or TSHUT. + */ +static void rk_tsadcv3_initialize(struct regmap *grf, void __iomem *regs, + enum tshut_polarity tshut_polarity) +{ + /* The tsadc control power sequence */ + if (IS_ERR(grf)) { + /* Set interleave value to workround ic time sync issue */ + writel_relaxed(TSADCV2_USER_INTER_PD_SOC, regs + + TSADCV2_USER_CON); + + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, + regs + TSADCV2_AUTO_PERIOD); + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_INT_DEBOUNCE); + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, + regs + TSADCV2_AUTO_PERIOD_HT); + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); + + } else { + /* Enable the voltage common mode feature */ + regmap_write(grf, GRF_TSADC_TESTBIT_L, GRF_TSADC_VCM_EN_L); + regmap_write(grf, GRF_TSADC_TESTBIT_H, GRF_TSADC_VCM_EN_H); + + usleep_range(15, 100); /* The spec note says at least 15 us */ + regmap_write(grf, GRF_SARADC_TESTBIT, GRF_SARADC_TESTBIT_ON); + regmap_write(grf, GRF_TSADC_TESTBIT_H, GRF_TSADC_TESTBIT_H_ON); + usleep_range(90, 200); /* The spec note says at least 90 us */ + + writel_relaxed(TSADCV3_AUTO_PERIOD_TIME, + regs + TSADCV2_AUTO_PERIOD); + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_INT_DEBOUNCE); + writel_relaxed(TSADCV3_AUTO_PERIOD_HT_TIME, + regs + TSADCV2_AUTO_PERIOD_HT); + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, + regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); + } + + if (tshut_polarity == TSHUT_HIGH_ACTIVE) + writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, + regs + TSADCV2_AUTO_CON); + else + writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH, + regs + TSADCV2_AUTO_CON); +} + +static void rk_tsadcv2_irq_ack(void __iomem *regs) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_INT_PD); + writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD); +} + +static void rk_tsadcv3_irq_ack(void __iomem *regs) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_INT_PD); + writel_relaxed(val & TSADCV3_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD); +} + +static void rk_tsadcv2_control(void __iomem *regs, bool enable) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + if (enable) + val |= TSADCV2_AUTO_EN; + else + val &= ~TSADCV2_AUTO_EN; + + writel_relaxed(val, regs + TSADCV2_AUTO_CON); +} + +/** + * rk_tsadcv3_control - the tsadc controller is enabled or disabled. + * + * NOTE: TSADC controller works at auto mode, and some SoCs need set the + * tsadc_q_sel bit on TSADCV2_AUTO_CON[1]. The (1024 - tsadc_q) as output + * adc value if setting this bit to enable. + */ +static void rk_tsadcv3_control(void __iomem *regs, bool enable) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + if (enable) + val |= TSADCV2_AUTO_EN | TSADCV3_AUTO_Q_SEL_EN; + else + val &= ~TSADCV2_AUTO_EN; + + writel_relaxed(val, regs + TSADCV2_AUTO_CON); +} + +static int rk_tsadcv2_get_temp(const struct chip_tsadc_table *table, + int chn, void __iomem *regs, int *temp) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_DATA(chn)); + + return rk_tsadcv2_code_to_temp(table, val, temp); +} + +static int rk_tsadcv2_alarm_temp(const struct chip_tsadc_table *table, + int chn, void __iomem *regs, int temp) +{ + u32 alarm_value; + u32 int_en, int_clr; + + /* + * In some cases, some sensors didn't need the trip points, the + * set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm + * in the end, ignore this case and disable the high temperature + * interrupt. + */ + if (temp == INT_MAX) { + int_clr = readl_relaxed(regs + TSADCV2_INT_EN); + int_clr &= ~TSADCV2_INT_SRC_EN(chn); + writel_relaxed(int_clr, regs + TSADCV2_INT_EN); + return 0; + } + + /* Make sure the value is valid */ + alarm_value = rk_tsadcv2_temp_to_code(table, temp); + if (alarm_value == table->data_mask) + return -ERANGE; + + writel_relaxed(alarm_value & table->data_mask, + regs + TSADCV2_COMP_INT(chn)); + + int_en = readl_relaxed(regs + TSADCV2_INT_EN); + int_en |= TSADCV2_INT_SRC_EN(chn); + writel_relaxed(int_en, regs + TSADCV2_INT_EN); + + return 0; +} + +static int rk_tsadcv2_tshut_temp(const struct chip_tsadc_table *table, + int chn, void __iomem *regs, int temp) +{ + u32 tshut_value, val; + + /* Make sure the value is valid */ + tshut_value = rk_tsadcv2_temp_to_code(table, temp); + if (tshut_value == table->data_mask) + return -ERANGE; + + writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); + + /* TSHUT will be valid */ + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON); + + return 0; +} + +static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs, + enum tshut_mode mode) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_INT_EN); + if (mode == TSHUT_MODE_GPIO) { + val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn); + val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn); + } else { + val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn); + val |= TSADCV2_SHUT_2CRU_SRC_EN(chn); + } + + writel_relaxed(val, regs + TSADCV2_INT_EN); +} + +static const struct rockchip_tsadc_chip rv1108_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_num = 1, /* one channel for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv3_irq_ack, + .control = rk_tsadcv3_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rv1108_table, + .length = ARRAY_SIZE(rv1108_table), + .data_mask = TSADCV2_DATA_MASK, + .mode = ADC_INCREMENT, + }, +}; + +static const struct rockchip_tsadc_chip rk3228_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_num = 1, /* one channel for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv3_irq_ack, + .control = rk_tsadcv3_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rk3228_code_table, + .length = ARRAY_SIZE(rk3228_code_table), + .data_mask = TSADCV3_DATA_MASK, + .mode = ADC_INCREMENT, + }, +}; + +static const struct rockchip_tsadc_chip rk3288_tsadc_data = { + .chn_id[SENSOR_CPU] = 1, /* cpu sensor is channel 1 */ + .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */ + .chn_num = 2, /* two channels for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv2_irq_ack, + .control = rk_tsadcv2_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rk3288_code_table, + .length = ARRAY_SIZE(rk3288_code_table), + .data_mask = TSADCV2_DATA_MASK, + .mode = ADC_DECREMENT, + }, +}; + +static const struct rockchip_tsadc_chip rk3328_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_num = 1, /* one channels for tsadc */ + + .tshut_mode = TSHUT_MODE_CRU, /* default TSHUT via CRU */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv3_irq_ack, + .control = rk_tsadcv3_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rk3328_code_table, + .length = ARRAY_SIZE(rk3328_code_table), + .data_mask = TSADCV2_DATA_MASK, + .mode = ADC_INCREMENT, + }, +}; + +static const struct rockchip_tsadc_chip rk3366_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */ + .chn_num = 2, /* two channels for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv3_initialize, + .irq_ack = rk_tsadcv3_irq_ack, + .control = rk_tsadcv3_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rk3228_code_table, + .length = ARRAY_SIZE(rk3228_code_table), + .data_mask = TSADCV3_DATA_MASK, + .mode = ADC_INCREMENT, + }, +}; + +static const struct rockchip_tsadc_chip rk3368_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */ + .chn_num = 2, /* two channels for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv2_initialize, + .irq_ack = rk_tsadcv2_irq_ack, + .control = rk_tsadcv2_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rk3368_code_table, + .length = ARRAY_SIZE(rk3368_code_table), + .data_mask = TSADCV3_DATA_MASK, + .mode = ADC_INCREMENT, + }, +}; + +static const struct rockchip_tsadc_chip rk3399_tsadc_data = { + .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */ + .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */ + .chn_num = 2, /* two channels for tsadc */ + + .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ + .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ + .tshut_temp = 95000, + + .initialize = rk_tsadcv3_initialize, + .irq_ack = rk_tsadcv3_irq_ack, + .control = rk_tsadcv3_control, + .get_temp = rk_tsadcv2_get_temp, + .set_alarm_temp = rk_tsadcv2_alarm_temp, + .set_tshut_temp = rk_tsadcv2_tshut_temp, + .set_tshut_mode = rk_tsadcv2_tshut_mode, + + .table = { + .id = rk3399_code_table, + .length = ARRAY_SIZE(rk3399_code_table), + .data_mask = TSADCV3_DATA_MASK, + .mode = ADC_INCREMENT, + }, +}; + +static const struct of_device_id of_rockchip_thermal_match[] = { + { + .compatible = "rockchip,rv1108-tsadc", + .data = (void *)&rv1108_tsadc_data, + }, + { + .compatible = "rockchip,rk3228-tsadc", + .data = (void *)&rk3228_tsadc_data, + }, + { + .compatible = "rockchip,rk3288-tsadc", + .data = (void *)&rk3288_tsadc_data, + }, + { + .compatible = "rockchip,rk3328-tsadc", + .data = (void *)&rk3328_tsadc_data, + }, + { + .compatible = "rockchip,rk3366-tsadc", + .data = (void *)&rk3366_tsadc_data, + }, + { + .compatible = "rockchip,rk3368-tsadc", + .data = (void *)&rk3368_tsadc_data, + }, + { + .compatible = "rockchip,rk3399-tsadc", + .data = (void *)&rk3399_tsadc_data, + }, + { /* end */ }, +}; +MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); + +static void +rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on) +{ + struct thermal_zone_device *tzd = sensor->tzd; + + tzd->ops->set_mode(tzd, + on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); +} + +static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) +{ + struct rockchip_thermal_data *thermal = dev; + int i; + + dev_dbg(&thermal->pdev->dev, "thermal alarm\n"); + + thermal->chip->irq_ack(thermal->regs); + + for (i = 0; i < thermal->chip->chn_num; i++) + thermal_zone_device_update(thermal->sensors[i].tzd, + THERMAL_EVENT_UNSPECIFIED); + + return IRQ_HANDLED; +} + +static int rockchip_thermal_set_trips(void *_sensor, int low, int high) +{ + struct rockchip_thermal_sensor *sensor = _sensor; + struct rockchip_thermal_data *thermal = sensor->thermal; + const struct rockchip_tsadc_chip *tsadc = thermal->chip; + + dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %d, high %d\n", + __func__, sensor->id, low, high); + + return tsadc->set_alarm_temp(&tsadc->table, + sensor->id, thermal->regs, high); +} + +static int rockchip_thermal_get_temp(void *_sensor, int *out_temp) +{ + struct rockchip_thermal_sensor *sensor = _sensor; + struct rockchip_thermal_data *thermal = sensor->thermal; + const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip; + int retval; + + retval = tsadc->get_temp(&tsadc->table, + sensor->id, thermal->regs, out_temp); + dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n", + sensor->id, *out_temp, retval); + + return retval; +} + +static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = { + .get_temp = rockchip_thermal_get_temp, + .set_trips = rockchip_thermal_set_trips, +}; + +static int rockchip_configure_from_dt(struct device *dev, + struct device_node *np, + struct rockchip_thermal_data *thermal) +{ + u32 shut_temp, tshut_mode, tshut_polarity; + + if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) { + dev_warn(dev, + "Missing tshut temp property, using default %d\n", + thermal->chip->tshut_temp); + thermal->tshut_temp = thermal->chip->tshut_temp; + } else { + if (shut_temp > INT_MAX) { + dev_err(dev, "Invalid tshut temperature specified: %d\n", + shut_temp); + return -ERANGE; + } + thermal->tshut_temp = shut_temp; + } + + if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) { + dev_warn(dev, + "Missing tshut mode property, using default (%s)\n", + thermal->chip->tshut_mode == TSHUT_MODE_GPIO ? + "gpio" : "cru"); + thermal->tshut_mode = thermal->chip->tshut_mode; + } else { + thermal->tshut_mode = tshut_mode; + } + + if (thermal->tshut_mode > 1) { + dev_err(dev, "Invalid tshut mode specified: %d\n", + thermal->tshut_mode); + return -EINVAL; + } + + if (of_property_read_u32(np, "rockchip,hw-tshut-polarity", + &tshut_polarity)) { + dev_warn(dev, + "Missing tshut-polarity property, using default (%s)\n", + thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ? + "low" : "high"); + thermal->tshut_polarity = thermal->chip->tshut_polarity; + } else { + thermal->tshut_polarity = tshut_polarity; + } + + if (thermal->tshut_polarity > 1) { + dev_err(dev, "Invalid tshut-polarity specified: %d\n", + thermal->tshut_polarity); + return -EINVAL; + } + + /* The tsadc wont to handle the error in here since some SoCs didn't + * need this property. + */ + thermal->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); + if (IS_ERR(thermal->grf)) + dev_warn(dev, "Missing rockchip,grf property\n"); + + return 0; +} + +static int +rockchip_thermal_register_sensor(struct platform_device *pdev, + struct rockchip_thermal_data *thermal, + struct rockchip_thermal_sensor *sensor, + int id) +{ + const struct rockchip_tsadc_chip *tsadc = thermal->chip; + int error; + + tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); + + error = tsadc->set_tshut_temp(&tsadc->table, id, thermal->regs, + thermal->tshut_temp); + if (error) + dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n", + __func__, thermal->tshut_temp, error); + + sensor->thermal = thermal; + sensor->id = id; + sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, id, + sensor, &rockchip_of_thermal_ops); + if (IS_ERR(sensor->tzd)) { + error = PTR_ERR(sensor->tzd); + dev_err(&pdev->dev, "failed to register sensor %d: %d\n", + id, error); + return error; + } + + return 0; +} + +/** + * Reset TSADC Controller, reset all tsadc registers. + */ +static void rockchip_thermal_reset_controller(struct reset_control *reset) +{ + reset_control_assert(reset); + usleep_range(10, 20); + reset_control_deassert(reset); +} + +static int rockchip_thermal_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct rockchip_thermal_data *thermal; + const struct of_device_id *match; + struct resource *res; + int irq; + int i; + int error; + + match = of_match_node(of_rockchip_thermal_match, np); + if (!match) + return -ENXIO; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq resource?\n"); + return -EINVAL; + } + + thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), + GFP_KERNEL); + if (!thermal) + return -ENOMEM; + + thermal->pdev = pdev; + + thermal->chip = (const struct rockchip_tsadc_chip *)match->data; + if (!thermal->chip) + return -EINVAL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + thermal->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(thermal->regs)) + return PTR_ERR(thermal->regs); + + thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb"); + if (IS_ERR(thermal->reset)) { + error = PTR_ERR(thermal->reset); + dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error); + return error; + } + + thermal->clk = devm_clk_get(&pdev->dev, "tsadc"); + if (IS_ERR(thermal->clk)) { + error = PTR_ERR(thermal->clk); + dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error); + return error; + } + + thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); + if (IS_ERR(thermal->pclk)) { + error = PTR_ERR(thermal->pclk); + dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n", + error); + return error; + } + + error = clk_prepare_enable(thermal->clk); + if (error) { + dev_err(&pdev->dev, "failed to enable converter clock: %d\n", + error); + return error; + } + + error = clk_prepare_enable(thermal->pclk); + if (error) { + dev_err(&pdev->dev, "failed to enable pclk: %d\n", error); + goto err_disable_clk; + } + + rockchip_thermal_reset_controller(thermal->reset); + + error = rockchip_configure_from_dt(&pdev->dev, np, thermal); + if (error) { + dev_err(&pdev->dev, "failed to parse device tree data: %d\n", + error); + goto err_disable_pclk; + } + + thermal->chip->initialize(thermal->grf, thermal->regs, + thermal->tshut_polarity); + + for (i = 0; i < thermal->chip->chn_num; i++) { + error = rockchip_thermal_register_sensor(pdev, thermal, + &thermal->sensors[i], + thermal->chip->chn_id[i]); + if (error) { + dev_err(&pdev->dev, + "failed to register sensor[%d] : error = %d\n", + i, error); + goto err_disable_pclk; + } + } + + error = devm_request_threaded_irq(&pdev->dev, irq, NULL, + &rockchip_thermal_alarm_irq_thread, + IRQF_ONESHOT, + "rockchip_thermal", thermal); + if (error) { + dev_err(&pdev->dev, + "failed to request tsadc irq: %d\n", error); + goto err_disable_pclk; + } + + thermal->chip->control(thermal->regs, true); + + for (i = 0; i < thermal->chip->chn_num; i++) + rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); + + platform_set_drvdata(pdev, thermal); + + return 0; + +err_disable_pclk: + clk_disable_unprepare(thermal->pclk); +err_disable_clk: + clk_disable_unprepare(thermal->clk); + + return error; +} + +static int rockchip_thermal_remove(struct platform_device *pdev) +{ + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < thermal->chip->chn_num; i++) { + struct rockchip_thermal_sensor *sensor = &thermal->sensors[i]; + + rockchip_thermal_toggle_sensor(sensor, false); + } + + thermal->chip->control(thermal->regs, false); + + clk_disable_unprepare(thermal->pclk); + clk_disable_unprepare(thermal->clk); + + return 0; +} + +static int __maybe_unused rockchip_thermal_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < thermal->chip->chn_num; i++) + rockchip_thermal_toggle_sensor(&thermal->sensors[i], false); + + thermal->chip->control(thermal->regs, false); + + clk_disable(thermal->pclk); + clk_disable(thermal->clk); + + pinctrl_pm_select_sleep_state(dev); + + return 0; +} + +static int __maybe_unused rockchip_thermal_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); + int i; + int error; + + error = clk_enable(thermal->clk); + if (error) + return error; + + error = clk_enable(thermal->pclk); + if (error) { + clk_disable(thermal->clk); + return error; + } + + rockchip_thermal_reset_controller(thermal->reset); + + thermal->chip->initialize(thermal->grf, thermal->regs, + thermal->tshut_polarity); + + for (i = 0; i < thermal->chip->chn_num; i++) { + int id = thermal->sensors[i].id; + + thermal->chip->set_tshut_mode(id, thermal->regs, + thermal->tshut_mode); + + error = thermal->chip->set_tshut_temp(&thermal->chip->table, + id, thermal->regs, + thermal->tshut_temp); + if (error) + dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n", + __func__, thermal->tshut_temp, error); + } + + thermal->chip->control(thermal->regs, true); + + for (i = 0; i < thermal->chip->chn_num; i++) + rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); + + pinctrl_pm_select_default_state(dev); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, + rockchip_thermal_suspend, rockchip_thermal_resume); + +static struct platform_driver rockchip_thermal_driver = { + .driver = { + .name = "rockchip-thermal", + .pm = &rockchip_thermal_pm_ops, + .of_match_table = of_rockchip_thermal_match, + }, + .probe = rockchip_thermal_probe, + .remove = rockchip_thermal_remove, +}; + +module_platform_driver(rockchip_thermal_driver); + +MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); +MODULE_AUTHOR("Rockchip, Inc."); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:rockchip-thermal"); |