/* * exynos_tmu.c - Samsung EXYNOS TMU (Thermal Management Unit) * * Copyright (C) 2014 Samsung Electronics * Bartlomiej Zolnierkiewicz * Lukasz Majewski * * Copyright (C) 2011 Samsung Electronics * Donggeun Kim * Amit Daniel Kachhap * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #include "exynos_tmu.h" #include "../thermal_core.h" /* Exynos generic registers */ #define EXYNOS_TMU_REG_TRIMINFO 0x0 #define EXYNOS_TMU_REG_CONTROL 0x20 #define EXYNOS_TMU_REG_STATUS 0x28 #define EXYNOS_TMU_REG_CURRENT_TEMP 0x40 #define EXYNOS_TMU_REG_INTEN 0x70 #define EXYNOS_TMU_REG_INTSTAT 0x74 #define EXYNOS_TMU_REG_INTCLEAR 0x78 #define EXYNOS_TMU_TEMP_MASK 0xff #define EXYNOS_TMU_REF_VOLTAGE_SHIFT 24 #define EXYNOS_TMU_REF_VOLTAGE_MASK 0x1f #define EXYNOS_TMU_BUF_SLOPE_SEL_MASK 0xf #define EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT 8 #define EXYNOS_TMU_CORE_EN_SHIFT 0 /* Exynos3250 specific registers */ #define EXYNOS_TMU_TRIMINFO_CON1 0x10 /* Exynos4210 specific registers */ #define EXYNOS4210_TMU_REG_THRESHOLD_TEMP 0x44 #define EXYNOS4210_TMU_REG_TRIG_LEVEL0 0x50 /* Exynos5250, Exynos4412, Exynos3250 specific registers */ #define EXYNOS_TMU_TRIMINFO_CON2 0x14 #define EXYNOS_THD_TEMP_RISE 0x50 #define EXYNOS_THD_TEMP_FALL 0x54 #define EXYNOS_EMUL_CON 0x80 #define EXYNOS_TRIMINFO_RELOAD_ENABLE 1 #define EXYNOS_TRIMINFO_25_SHIFT 0 #define EXYNOS_TRIMINFO_85_SHIFT 8 #define EXYNOS_TMU_TRIP_MODE_SHIFT 13 #define EXYNOS_TMU_TRIP_MODE_MASK 0x7 #define EXYNOS_TMU_THERM_TRIP_EN_SHIFT 12 #define EXYNOS_TMU_INTEN_RISE0_SHIFT 0 #define EXYNOS_TMU_INTEN_RISE1_SHIFT 4 #define EXYNOS_TMU_INTEN_RISE2_SHIFT 8 #define EXYNOS_TMU_INTEN_RISE3_SHIFT 12 #define EXYNOS_TMU_INTEN_FALL0_SHIFT 16 #define EXYNOS_EMUL_TIME 0x57F0 #define EXYNOS_EMUL_TIME_MASK 0xffff #define EXYNOS_EMUL_TIME_SHIFT 16 #define EXYNOS_EMUL_DATA_SHIFT 8 #define EXYNOS_EMUL_DATA_MASK 0xFF #define EXYNOS_EMUL_ENABLE 0x1 /* Exynos5260 specific */ #define EXYNOS5260_TMU_REG_INTEN 0xC0 #define EXYNOS5260_TMU_REG_INTSTAT 0xC4 #define EXYNOS5260_TMU_REG_INTCLEAR 0xC8 #define EXYNOS5260_EMUL_CON 0x100 /* Exynos4412 specific */ #define EXYNOS4412_MUX_ADDR_VALUE 6 #define EXYNOS4412_MUX_ADDR_SHIFT 20 /*exynos5440 specific registers*/ #define EXYNOS5440_TMU_S0_7_TRIM 0x000 #define EXYNOS5440_TMU_S0_7_CTRL 0x020 #define EXYNOS5440_TMU_S0_7_DEBUG 0x040 #define EXYNOS5440_TMU_S0_7_TEMP 0x0f0 #define EXYNOS5440_TMU_S0_7_TH0 0x110 #define EXYNOS5440_TMU_S0_7_TH1 0x130 #define EXYNOS5440_TMU_S0_7_TH2 0x150 #define EXYNOS5440_TMU_S0_7_IRQEN 0x210 #define EXYNOS5440_TMU_S0_7_IRQ 0x230 /* exynos5440 common registers */ #define EXYNOS5440_TMU_IRQ_STATUS 0x000 #define EXYNOS5440_TMU_PMIN 0x004 #define EXYNOS5440_TMU_INTEN_RISE0_SHIFT 0 #define EXYNOS5440_TMU_INTEN_RISE1_SHIFT 1 #define EXYNOS5440_TMU_INTEN_RISE2_SHIFT 2 #define EXYNOS5440_TMU_INTEN_RISE3_SHIFT 3 #define EXYNOS5440_TMU_INTEN_FALL0_SHIFT 4 #define EXYNOS5440_TMU_TH_RISE4_SHIFT 24 #define EXYNOS5440_EFUSE_SWAP_OFFSET 8 #define MCELSIUS 1000 /** * struct exynos_tmu_data : A structure to hold the private data of the TMU driver * @id: identifier of the one instance of the TMU controller. * @pdata: pointer to the tmu platform/configuration data * @base: base address of the single instance of the TMU controller. * @base_second: base address of the common registers of the TMU controller. * @irq: irq number of the TMU controller. * @soc: id of the SOC type. * @irq_work: pointer to the irq work structure. * @lock: lock to implement synchronization. * @clk: pointer to the clock structure. * @clk_sec: pointer to the clock structure for accessing the base_second. * @temp_error1: fused value of the first point trim. * @temp_error2: fused value of the second point trim. * @regulator: pointer to the TMU regulator structure. * @reg_conf: pointer to structure to register with core thermal. * @tmu_initialize: SoC specific TMU initialization method * @tmu_control: SoC specific TMU control method * @tmu_read: SoC specific TMU temperature read method * @tmu_set_emulation: SoC specific TMU emulation setting method * @tmu_clear_irqs: SoC specific TMU interrupts clearing method */ struct exynos_tmu_data { int id; struct exynos_tmu_platform_data *pdata; void __iomem *base; void __iomem *base_second; int irq; enum soc_type soc; struct work_struct irq_work; struct mutex lock; struct clk *clk, *clk_sec; u8 temp_error1, temp_error2; struct regulator *regulator; struct thermal_zone_device *tzd; int (*tmu_initialize)(struct platform_device *pdev); void (*tmu_control)(struct platform_device *pdev, bool on); int (*tmu_read)(struct exynos_tmu_data *data); void (*tmu_set_emulation)(struct exynos_tmu_data *data, unsigned long temp); void (*tmu_clear_irqs)(struct exynos_tmu_data *data); }; static void exynos_report_trigger(struct exynos_tmu_data *p) { char data[10], *envp[] = { data, NULL }; struct thermal_zone_device *tz = p->tzd; unsigned long temp; unsigned int i; if (!p) { pr_err("Wrong temperature configuration data\n"); return; } thermal_zone_device_update(tz); mutex_lock(&tz->lock); /* Find the level for which trip happened */ for (i = 0; i < of_thermal_get_ntrips(tz); i++) { tz->ops->get_trip_temp(tz, i, &temp); if (tz->last_temperature < temp) break; } snprintf(data, sizeof(data), "%u", i); kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, envp); mutex_unlock(&tz->lock); } /* * TMU treats temperature as a mapped temperature code. * The temperature is converted differently depending on the calibration type. */ static int temp_to_code(struct exynos_tmu_data *data, u8 temp) { struct exynos_tmu_platform_data *pdata = data->pdata; int temp_code; switch (pdata->cal_type) { case TYPE_TWO_POINT_TRIMMING: temp_code = (temp - pdata->first_point_trim) * (data->temp_error2 - data->temp_error1) / (pdata->second_point_trim - pdata->first_point_trim) + data->temp_error1; break; case TYPE_ONE_POINT_TRIMMING: temp_code = temp + data->temp_error1 - pdata->first_point_trim; break; default: temp_code = temp + pdata->default_temp_offset; break; } return temp_code; } /* * Calculate a temperature value from a temperature code. * The unit of the temperature is degree Celsius. */ static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code) { struct exynos_tmu_platform_data *pdata = data->pdata; int temp; switch (pdata->cal_type) { case TYPE_TWO_POINT_TRIMMING: temp = (temp_code - data->temp_error1) * (pdata->second_point_trim - pdata->first_point_trim) / (data->temp_error2 - data->temp_error1) + pdata->first_point_trim; break; case TYPE_ONE_POINT_TRIMMING: temp = temp_code - data->temp_error1 + pdata->first_point_trim; break; default: temp = temp_code - pdata->default_temp_offset; break; } return temp; } static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info) { struct exynos_tmu_platform_data *pdata = data->pdata; data->temp_error1 = trim_info & EXYNOS_TMU_TEMP_MASK; data->temp_error2 = ((trim_info >> EXYNOS_TRIMINFO_85_SHIFT) & EXYNOS_TMU_TEMP_MASK); if (!data->temp_error1 || (pdata->min_efuse_value > data->temp_error1) || (data->temp_error1 > pdata->max_efuse_value)) data->temp_error1 = pdata->efuse_value & EXYNOS_TMU_TEMP_MASK; if (!data->temp_error2) data->temp_error2 = (pdata->efuse_value >> EXYNOS_TRIMINFO_85_SHIFT) & EXYNOS_TMU_TEMP_MASK; } static u32 get_th_reg(struct exynos_tmu_data *data, u32 threshold, bool falling) { struct thermal_zone_device *tz = data->tzd; const struct thermal_trip * const trips = of_thermal_get_trip_points(tz); unsigned long temp; int i; if (!trips) { pr_err("%s: Cannot get trip points from of-thermal.c!\n", __func__); return 0; } for (i = 0; i < of_thermal_get_ntrips(tz); i++) { if (trips[i].type == THERMAL_TRIP_CRITICAL) continue; temp = trips[i].temperature / MCELSIUS; if (falling) temp -= (trips[i].hysteresis / MCELSIUS); else threshold &= ~(0xff << 8 * i); threshold |= temp_to_code(data, temp) << 8 * i; } return threshold; } static int exynos_tmu_initialize(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); int ret; mutex_lock(&data->lock); clk_enable(data->clk); if (!IS_ERR(data->clk_sec)) clk_enable(data->clk_sec); ret = data->tmu_initialize(pdev); clk_disable(data->clk); mutex_unlock(&data->lock); if (!IS_ERR(data->clk_sec)) clk_disable(data->clk_sec); return ret; } static u32 get_con_reg(struct exynos_tmu_data *data, u32 con) { struct exynos_tmu_platform_data *pdata = data->pdata; if (data->soc == SOC_ARCH_EXYNOS4412 || data->soc == SOC_ARCH_EXYNOS3250) con |= (EXYNOS4412_MUX_ADDR_VALUE << EXYNOS4412_MUX_ADDR_SHIFT); con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK << EXYNOS_TMU_REF_VOLTAGE_SHIFT); con |= pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT; con &= ~(EXYNOS_TMU_BUF_SLOPE_SEL_MASK << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT); con |= (pdata->gain << EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT); if (pdata->noise_cancel_mode) { con &= ~(EXYNOS_TMU_TRIP_MODE_MASK << EXYNOS_TMU_TRIP_MODE_SHIFT); con |= (pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT); } return con; } static void exynos_tmu_control(struct platform_device *pdev, bool on) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); mutex_lock(&data->lock); clk_enable(data->clk); data->tmu_control(pdev, on); clk_disable(data->clk); mutex_unlock(&data->lock); } static int exynos4210_tmu_initialize(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); struct thermal_zone_device *tz = data->tzd; const struct thermal_trip * const trips = of_thermal_get_trip_points(tz); int ret = 0, threshold_code, i; unsigned long reference, temp; unsigned int status; if (!trips) { pr_err("%s: Cannot get trip points from of-thermal.c!\n", __func__); ret = -ENODEV; goto out; } status = readb(data->base + EXYNOS_TMU_REG_STATUS); if (!status) { ret = -EBUSY; goto out; } sanitize_temp_error(data, readl(data->base + EXYNOS_TMU_REG_TRIMINFO)); /* Write temperature code for threshold */ reference = trips[0].temperature / MCELSIUS; threshold_code = temp_to_code(data, reference); if (threshold_code < 0) { ret = threshold_code; goto out; } writeb(threshold_code, data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP); for (i = 0; i < of_thermal_get_ntrips(tz); i++) { temp = trips[i].temperature / MCELSIUS; writeb(temp - reference, data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL0 + i * 4); } data->tmu_clear_irqs(data); out: return ret; } static int exynos4412_tmu_initialize(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); const struct thermal_trip * const trips = of_thermal_get_trip_points(data->tzd); unsigned int status, trim_info, con, ctrl, rising_threshold; int ret = 0, threshold_code, i; unsigned long crit_temp = 0; status = readb(data->base + EXYNOS_TMU_REG_STATUS); if (!status) { ret = -EBUSY; goto out; } if (data->soc == SOC_ARCH_EXYNOS3250 || data->soc == SOC_ARCH_EXYNOS4412 || data->soc == SOC_ARCH_EXYNOS5250) { if (data->soc == SOC_ARCH_EXYNOS3250) { ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON1); ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE; writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON1); } ctrl = readl(data->base + EXYNOS_TMU_TRIMINFO_CON2); ctrl |= EXYNOS_TRIMINFO_RELOAD_ENABLE; writel(ctrl, data->base + EXYNOS_TMU_TRIMINFO_CON2); } /* On exynos5420 the triminfo register is in the shared space */ if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) trim_info = readl(data->base_second + EXYNOS_TMU_REG_TRIMINFO); else trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO); sanitize_temp_error(data, trim_info); /* Write temperature code for rising and falling threshold */ rising_threshold = readl(data->base + EXYNOS_THD_TEMP_RISE); rising_threshold = get_th_reg(data, rising_threshold, false); writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE); writel(get_th_reg(data, 0, true), data->base + EXYNOS_THD_TEMP_FALL); data->tmu_clear_irqs(data); /* if last threshold limit is also present */ for (i = 0; i < of_thermal_get_ntrips(data->tzd); i++) { if (trips[i].type == THERMAL_TRIP_CRITICAL) { crit_temp = trips[i].temperature; break; } } if (i == of_thermal_get_ntrips(data->tzd)) { pr_err("%s: No CRITICAL trip point defined at of-thermal.c!\n", __func__); ret = -EINVAL; goto out; } threshold_code = temp_to_code(data, crit_temp / MCELSIUS); /* 1-4 level to be assigned in th0 reg */ rising_threshold &= ~(0xff << 8 * i); rising_threshold |= threshold_code << 8 * i; writel(rising_threshold, data->base + EXYNOS_THD_TEMP_RISE); con = readl(data->base + EXYNOS_TMU_REG_CONTROL); con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT); writel(con, data->base + EXYNOS_TMU_REG_CONTROL); out: return ret; } static int exynos5440_tmu_initialize(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); unsigned int trim_info = 0, con, rising_threshold; int ret = 0, threshold_code; unsigned long crit_temp = 0; /* * For exynos5440 soc triminfo value is swapped between TMU0 and * TMU2, so the below logic is needed. */ switch (data->id) { case 0: trim_info = readl(data->base + EXYNOS5440_EFUSE_SWAP_OFFSET + EXYNOS5440_TMU_S0_7_TRIM); break; case 1: trim_info = readl(data->base + EXYNOS5440_TMU_S0_7_TRIM); break; case 2: trim_info = readl(data->base - EXYNOS5440_EFUSE_SWAP_OFFSET + EXYNOS5440_TMU_S0_7_TRIM); } sanitize_temp_error(data, trim_info); /* Write temperature code for rising and falling threshold */ rising_threshold = readl(data->base + EXYNOS5440_TMU_S0_7_TH0); rising_threshold = get_th_reg(data, rising_threshold, false); writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH0); writel(0, data->base + EXYNOS5440_TMU_S0_7_TH1); data->tmu_clear_irqs(data); /* if last threshold limit is also present */ if (!data->tzd->ops->get_crit_temp(data->tzd, &crit_temp)) { threshold_code = temp_to_code(data, crit_temp / MCELSIUS); /* 5th level to be assigned in th2 reg */ rising_threshold = threshold_code << EXYNOS5440_TMU_TH_RISE4_SHIFT; writel(rising_threshold, data->base + EXYNOS5440_TMU_S0_7_TH2); con = readl(data->base + EXYNOS5440_TMU_S0_7_CTRL); con |= (1 << EXYNOS_TMU_THERM_TRIP_EN_SHIFT); writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL); } /* Clear the PMIN in the common TMU register */ if (!data->id) writel(0, data->base_second + EXYNOS5440_TMU_PMIN); return ret; } static void exynos4210_tmu_control(struct platform_device *pdev, bool on) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); struct thermal_zone_device *tz = data->tzd; unsigned int con, interrupt_en; con = get_con_reg(data, readl(data->base + EXYNOS_TMU_REG_CONTROL)); if (on) { con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT); interrupt_en = (of_thermal_is_trip_valid(tz, 3) << EXYNOS_TMU_INTEN_RISE3_SHIFT) | (of_thermal_is_trip_valid(tz, 2) << EXYNOS_TMU_INTEN_RISE2_SHIFT) | (of_thermal_is_trip_valid(tz, 1) << EXYNOS_TMU_INTEN_RISE1_SHIFT) | (of_thermal_is_trip_valid(tz, 0) << EXYNOS_TMU_INTEN_RISE0_SHIFT); if (data->soc != SOC_ARCH_EXYNOS4210) interrupt_en |= interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT; } else { con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT); interrupt_en = 0; /* Disable all interrupts */ } writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN); writel(con, data->base + EXYNOS_TMU_REG_CONTROL); } static void exynos5440_tmu_control(struct platform_device *pdev, bool on) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); struct thermal_zone_device *tz = data->tzd; unsigned int con, interrupt_en; con = get_con_reg(data, readl(data->base + EXYNOS5440_TMU_S0_7_CTRL)); if (on) { con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT); interrupt_en = (of_thermal_is_trip_valid(tz, 3) << EXYNOS5440_TMU_INTEN_RISE3_SHIFT) | (of_thermal_is_trip_valid(tz, 2) << EXYNOS5440_TMU_INTEN_RISE2_SHIFT) | (of_thermal_is_trip_valid(tz, 1) << EXYNOS5440_TMU_INTEN_RISE1_SHIFT) | (of_thermal_is_trip_valid(tz, 0) << EXYNOS5440_TMU_INTEN_RISE0_SHIFT); interrupt_en |= interrupt_en << EXYNOS5440_TMU_INTEN_FALL0_SHIFT; } else { con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT); interrupt_en = 0; /* Disable all interrupts */ } writel(interrupt_en, data->base + EXYNOS5440_TMU_S0_7_IRQEN); writel(con, data->base + EXYNOS5440_TMU_S0_7_CTRL); } static int exynos_get_temp(void *p, long *temp) { struct exynos_tmu_data *data = p; if (!data) return -EINVAL; mutex_lock(&data->lock); clk_enable(data->clk); *temp = code_to_temp(data, data->tmu_read(data)) * MCELSIUS; clk_disable(data->clk); mutex_unlock(&data->lock); return 0; } #ifdef CONFIG_THERMAL_EMULATION static u32 get_emul_con_reg(struct exynos_tmu_data *data, unsigned int val, unsigned long temp) { if (temp) { temp /= MCELSIUS; if (data->soc != SOC_ARCH_EXYNOS5440) { val &= ~(EXYNOS_EMUL_TIME_MASK << EXYNOS_EMUL_TIME_SHIFT); val |= (EXYNOS_EMUL_TIME << EXYNOS_EMUL_TIME_SHIFT); } val &= ~(EXYNOS_EMUL_DATA_MASK << EXYNOS_EMUL_DATA_SHIFT); val |= (temp_to_code(data, temp) << EXYNOS_EMUL_DATA_SHIFT) | EXYNOS_EMUL_ENABLE; } else { val &= ~EXYNOS_EMUL_ENABLE; } return val; } static void exynos4412_tmu_set_emulation(struct exynos_tmu_data *data, unsigned long temp) { unsigned int val; u32 emul_con; if (data->soc == SOC_ARCH_EXYNOS5260) emul_con = EXYNOS5260_EMUL_CON; else emul_con = EXYNOS_EMUL_CON; val = readl(data->base + emul_con); val = get_emul_con_reg(data, val, temp); writel(val, data->base + emul_con); } static void exynos5440_tmu_set_emulation(struct exynos_tmu_data *data, unsigned long temp) { unsigned int val; val = readl(data->base + EXYNOS5440_TMU_S0_7_DEBUG); val = get_emul_con_reg(data, val, temp); writel(val, data->base + EXYNOS5440_TMU_S0_7_DEBUG); } static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp) { struct exynos_tmu_data *data = drv_data; int ret = -EINVAL; if (data->soc == SOC_ARCH_EXYNOS4210) goto out; if (temp && temp < MCELSIUS) goto out; mutex_lock(&data->lock); clk_enable(data->clk); data->tmu_set_emulation(data, temp); clk_disable(data->clk); mutex_unlock(&data->lock); return 0; out: return ret; } #else #define exynos4412_tmu_set_emulation NULL #define exynos5440_tmu_set_emulation NULL static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp) { return -EINVAL; } #endif /* CONFIG_THERMAL_EMULATION */ static int exynos4210_tmu_read(struct exynos_tmu_data *data) { int ret = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP); /* "temp_code" should range between 75 and 175 */ return (ret < 75 || ret > 175) ? -ENODATA : ret; } static int exynos4412_tmu_read(struct exynos_tmu_data *data) { return readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP); } static int exynos5440_tmu_read(struct exynos_tmu_data *data) { return readb(data->base + EXYNOS5440_TMU_S0_7_TEMP); } static void exynos_tmu_work(struct work_struct *work) { struct exynos_tmu_data *data = container_of(work, struct exynos_tmu_data, irq_work); unsigned int val_type; if (!IS_ERR(data->clk_sec)) clk_enable(data->clk_sec); /* Find which sensor generated this interrupt */ if (data->soc == SOC_ARCH_EXYNOS5440) { val_type = readl(data->base_second + EXYNOS5440_TMU_IRQ_STATUS); if (!((val_type >> data->id) & 0x1)) goto out; } if (!IS_ERR(data->clk_sec)) clk_disable(data->clk_sec); exynos_report_trigger(data); mutex_lock(&data->lock); clk_enable(data->clk); /* TODO: take action based on particular interrupt */ data->tmu_clear_irqs(data); clk_disable(data->clk); mutex_unlock(&data->lock); out: enable_irq(data->irq); } static void exynos4210_tmu_clear_irqs(struct exynos_tmu_data *data) { unsigned int val_irq; u32 tmu_intstat, tmu_intclear; if (data->soc == SOC_ARCH_EXYNOS5260) { tmu_intstat = EXYNOS5260_TMU_REG_INTSTAT; tmu_intclear = EXYNOS5260_TMU_REG_INTCLEAR; } else { tmu_intstat = EXYNOS_TMU_REG_INTSTAT; tmu_intclear = EXYNOS_TMU_REG_INTCLEAR; } val_irq = readl(data->base + tmu_intstat); /* * Clear the interrupts. Please note that the documentation for * Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly * states that INTCLEAR register has a different placing of bits * responsible for FALL IRQs than INTSTAT register. Exynos5420 * and Exynos5440 documentation is correct (Exynos4210 doesn't * support FALL IRQs at all). */ writel(val_irq, data->base + tmu_intclear); } static void exynos5440_tmu_clear_irqs(struct exynos_tmu_data *data) { unsigned int val_irq; val_irq = readl(data->base + EXYNOS5440_TMU_S0_7_IRQ); /* clear the interrupts */ writel(val_irq, data->base + EXYNOS5440_TMU_S0_7_IRQ); } static irqreturn_t exynos_tmu_irq(int irq, void *id) { struct exynos_tmu_data *data = id; disable_irq_nosync(irq); schedule_work(&data->irq_work); return IRQ_HANDLED; } static const struct of_device_id exynos_tmu_match[] = { { .compatible = "samsung,exynos3250-tmu", }, { .compatible = "samsung,exynos4210-tmu", }, { .compatible = "samsung,exynos4412-tmu", }, { .compatible = "samsung,exynos5250-tmu", }, { .compatible = "samsung,exynos5260-tmu", }, { .compatible = "samsung,exynos5420-tmu", }, { .compatible = "samsung,exynos5420-tmu-ext-triminfo", }, { .compatible = "samsung,exynos5440-tmu", }, {}, }; MODULE_DEVICE_TABLE(of, exynos_tmu_match); static int exynos_of_get_soc_type(struct device_node *np) { if (of_device_is_compatible(np, "samsung,exynos3250-tmu")) return SOC_ARCH_EXYNOS3250; else if (of_device_is_compatible(np, "samsung,exynos4210-tmu")) return SOC_ARCH_EXYNOS4210; else if (of_device_is_compatible(np, "samsung,exynos4412-tmu")) return SOC_ARCH_EXYNOS4412; else if (of_device_is_compatible(np, "samsung,exynos5250-tmu")) return SOC_ARCH_EXYNOS5250; else if (of_device_is_compatible(np, "samsung,exynos5260-tmu")) return SOC_ARCH_EXYNOS5260; else if (of_device_is_compatible(np, "samsung,exynos5420-tmu")) return SOC_ARCH_EXYNOS5420; else if (of_device_is_compatible(np, "samsung,exynos5420-tmu-ext-triminfo")) return SOC_ARCH_EXYNOS5420_TRIMINFO; else if (of_device_is_compatible(np, "samsung,exynos5440-tmu")) return SOC_ARCH_EXYNOS5440; return -EINVAL; } static int exynos_of_sensor_conf(struct device_node *np, struct exynos_tmu_platform_data *pdata) { u32 value; int ret; of_node_get(np); ret = of_property_read_u32(np, "samsung,tmu_gain", &value); pdata->gain = (u8)value; of_property_read_u32(np, "samsung,tmu_reference_voltage", &value); pdata->reference_voltage = (u8)value; of_property_read_u32(np, "samsung,tmu_noise_cancel_mode", &value); pdata->noise_cancel_mode = (u8)value; of_property_read_u32(np, "samsung,tmu_efuse_value", &pdata->efuse_value); of_property_read_u32(np, "samsung,tmu_min_efuse_value", &pdata->min_efuse_value); of_property_read_u32(np, "samsung,tmu_max_efuse_value", &pdata->max_efuse_value); of_property_read_u32(np, "samsung,tmu_first_point_trim", &value); pdata->first_point_trim = (u8)value; of_property_read_u32(np, "samsung,tmu_second_point_trim", &value); pdata->second_point_trim = (u8)value; of_property_read_u32(np, "samsung,tmu_default_temp_offset", &value); pdata->default_temp_offset = (u8)value; of_property_read_u32(np, "samsung,tmu_cal_type", &pdata->cal_type); of_property_read_u32(np, "samsung,tmu_cal_mode", &pdata->cal_mode); of_node_put(np); return 0; } static int exynos_map_dt_data(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); struct exynos_tmu_platform_data *pdata; struct resource res; int ret; if (!data || !pdev->dev.of_node) return -ENODEV; /* * Try enabling the regulator if found * TODO: Add regulator as an SOC feature, so that regulator enable * is a compulsory call. */ data->regulator = devm_regulator_get(&pdev->dev, "vtmu"); if (!IS_ERR(data->regulator)) { ret = regulator_enable(data->regulator); if (ret) { dev_err(&pdev->dev, "failed to enable vtmu\n"); return ret; } } else { dev_info(&pdev->dev, "Regulator node (vtmu) not found\n"); } data->id = of_alias_get_id(pdev->dev.of_node, "tmuctrl"); if (data->id < 0) data->id = 0; data->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); if (data->irq <= 0) { dev_err(&pdev->dev, "failed to get IRQ\n"); return -ENODEV; } if (of_address_to_resource(pdev->dev.of_node, 0, &res)) { dev_err(&pdev->dev, "failed to get Resource 0\n"); return -ENODEV; } data->base = devm_ioremap(&pdev->dev, res.start, resource_size(&res)); if (!data->base) { dev_err(&pdev->dev, "Failed to ioremap memory\n"); return -EADDRNOTAVAIL; } pdata = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_platform_data), GFP_KERNEL); if (!pdata) return -ENOMEM; exynos_of_sensor_conf(pdev->dev.of_node, pdata); data->pdata = pdata; data->soc = exynos_of_get_soc_type(pdev->dev.of_node); switch (data->soc) { case SOC_ARCH_EXYNOS4210: data->tmu_initialize = exynos4210_tmu_initialize; data->tmu_control = exynos4210_tmu_control; data->tmu_read = exynos4210_tmu_read; data->tmu_clear_irqs = exynos4210_tmu_clear_irqs; break; case SOC_ARCH_EXYNOS3250: case SOC_ARCH_EXYNOS4412: case SOC_ARCH_EXYNOS5250: case SOC_ARCH_EXYNOS5260: case SOC_ARCH_EXYNOS5420: case SOC_ARCH_EXYNOS5420_TRIMINFO: data->tmu_initialize = exynos4412_tmu_initialize; data->tmu_control = exynos4210_tmu_control; data->tmu_read = exynos4412_tmu_read; data->tmu_set_emulation = exynos4412_tmu_set_emulation; data->tmu_clear_irqs = exynos4210_tmu_clear_irqs; break; case SOC_ARCH_EXYNOS5440: data->tmu_initialize = exynos5440_tmu_initialize; data->tmu_control = exynos5440_tmu_control; data->tmu_read = exynos5440_tmu_read; data->tmu_set_emulation = exynos5440_tmu_set_emulation; data->tmu_clear_irqs = exynos5440_tmu_clear_irqs; break; default: dev_err(&pdev->dev, "Platform not supported\n"); return -EINVAL; } /* * Check if the TMU shares some registers and then try to map the * memory of common registers. */ if (data->soc != SOC_ARCH_EXYNOS5420_TRIMINFO && data->soc != SOC_ARCH_EXYNOS5440) return 0; if (of_address_to_resource(pdev->dev.of_node, 1, &res)) { dev_err(&pdev->dev, "failed to get Resource 1\n"); return -ENODEV; } data->base_second = devm_ioremap(&pdev->dev, res.start, resource_size(&res)); if (!data->base_second) { dev_err(&pdev->dev, "Failed to ioremap memory\n"); return -ENOMEM; } return 0; } static struct thermal_zone_of_device_ops exynos_sensor_ops = { .get_temp = exynos_get_temp, .set_emul_temp = exynos_tmu_set_emulation, }; static int exynos_tmu_probe(struct platform_device *pdev) { struct exynos_tmu_platform_data *pdata; struct exynos_tmu_data *data; int ret; data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data), GFP_KERNEL); if (!data) return -ENOMEM; platform_set_drvdata(pdev, data); mutex_init(&data->lock); data->tzd = thermal_zone_of_sensor_register(&pdev->dev, 0, data, &exynos_sensor_ops); if (IS_ERR(data->tzd)) { pr_err("thermal: tz: %p ERROR\n", data->tzd); return PTR_ERR(data->tzd); } ret = exynos_map_dt_data(pdev); if (ret) goto err_sensor; pdata = data->pdata; INIT_WORK(&data->irq_work, exynos_tmu_work); data->clk = devm_clk_get(&pdev->dev, "tmu_apbif"); if (IS_ERR(data->clk)) { dev_err(&pdev->dev, "Failed to get clock\n"); ret = PTR_ERR(data->clk); goto err_sensor; } data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif"); if (IS_ERR(data->clk_sec)) { if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) { dev_err(&pdev->dev, "Failed to get triminfo clock\n"); ret = PTR_ERR(data->clk_sec); goto err_sensor; } } else { ret = clk_prepare(data->clk_sec); if (ret) { dev_err(&pdev->dev, "Failed to get clock\n"); goto err_sensor; } } ret = clk_prepare(data->clk); if (ret) { dev_err(&pdev->dev, "Failed to get clock\n"); goto err_clk_sec; } ret = exynos_tmu_initialize(pdev); if (ret) { dev_err(&pdev->dev, "Failed to initialize TMU\n"); goto err_clk; } ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq, IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data); if (ret) { dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq); goto err_clk; } exynos_tmu_control(pdev, true); return 0; err_clk: clk_unprepare(data->clk); err_clk_sec: if (!IS_ERR(data->clk_sec)) clk_unprepare(data->clk_sec); err_sensor: thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd); return ret; } static int exynos_tmu_remove(struct platform_device *pdev) { struct exynos_tmu_data *data = platform_get_drvdata(pdev); struct thermal_zone_device *tzd = data->tzd; thermal_zone_of_sensor_unregister(&pdev->dev, tzd); exynos_tmu_control(pdev, false); clk_unprepare(data->clk); if (!IS_ERR(data->clk_sec)) clk_unprepare(data->clk_sec); if (!IS_ERR(data->regulator)) regulator_disable(data->regulator); return 0; } #ifdef CONFIG_PM_SLEEP static int exynos_tmu_suspend(struct device *dev) { exynos_tmu_control(to_platform_device(dev), false); return 0; } static int exynos_tmu_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); exynos_tmu_initialize(pdev); exynos_tmu_control(pdev, true); return 0; } static SIMPLE_DEV_PM_OPS(exynos_tmu_pm, exynos_tmu_suspend, exynos_tmu_resume); #define EXYNOS_TMU_PM (&exynos_tmu_pm) #else #define EXYNOS_TMU_PM NULL #endif static struct platform_driver exynos_tmu_driver = { .driver = { .name = "exynos-tmu", .pm = EXYNOS_TMU_PM, .of_match_table = exynos_tmu_match, }, .probe = exynos_tmu_probe, .remove = exynos_tmu_remove, }; module_platform_driver(exynos_tmu_driver); MODULE_DESCRIPTION("EXYNOS TMU Driver"); MODULE_AUTHOR("Donggeun Kim "); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:exynos-tmu");