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linux/drivers/thermal/samsung/exynos_tmu.h
Amit Daniel Kachhap a0395eee7c thermal: exynos: Add driver support for exynos5440 TMU sensor 
This patch modifies TMU controller to add changes needed to work with
exynos5440 platform. This sensor registers 3 instance of the tmu controller
with the thermal zone and hence reports 3 temperature output. This controller
supports upto five trip points. For critical threshold the driver uses the
core driver thermal framework for shutdown.

Acked-by: Jonghwa Lee <jonghwa3.lee@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Jungseok Lee <jays.lee@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
2013-08-13 09:52:03 -04:00

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/*
* exynos_tmu.h - Samsung EXYNOS TMU (Thermal Management Unit)
*
* Copyright (C) 2011 Samsung Electronics
* Donggeun Kim <dg77.kim@samsung.com>
* Amit Daniel Kachhap <amit.daniel@samsung.com>
*
* 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
*/
#ifndef _EXYNOS_TMU_H
#define _EXYNOS_TMU_H
#include <linux/cpu_cooling.h>
#include "exynos_thermal_common.h"
enum calibration_type {
TYPE_ONE_POINT_TRIMMING,
TYPE_TWO_POINT_TRIMMING,
TYPE_NONE,
};
enum calibration_mode {
SW_MODE,
HW_MODE,
};
enum soc_type {
SOC_ARCH_EXYNOS4210 = 1,
SOC_ARCH_EXYNOS,
SOC_ARCH_EXYNOS5440,
};
/**
* EXYNOS TMU supported features.
* TMU_SUPPORT_EMULATION - This features is used to set user defined
* temperature to the TMU controller.
* TMU_SUPPORT_MULTI_INST - This features denotes that the soc
* has many instances of TMU.
* TMU_SUPPORT_TRIM_RELOAD - This features shows that trimming can
* be reloaded.
* TMU_SUPPORT_FALLING_TRIP - This features shows that interrupt can
* be registered for falling trips also.
* TMU_SUPPORT_READY_STATUS - This feature tells that the TMU current
* state(active/idle) can be checked.
* TMU_SUPPORT_EMUL_TIME - This features allows to set next temp emulation
* sample time.
* TMU_SUPPORT_SHARED_MEMORY - This feature tells that the different TMU
* sensors shares some common registers.
* TMU_SUPPORT - macro to compare the above features with the supplied.
*/
#define TMU_SUPPORT_EMULATION BIT(0)
#define TMU_SUPPORT_MULTI_INST BIT(1)
#define TMU_SUPPORT_TRIM_RELOAD BIT(2)
#define TMU_SUPPORT_FALLING_TRIP BIT(3)
#define TMU_SUPPORT_READY_STATUS BIT(4)
#define TMU_SUPPORT_EMUL_TIME BIT(5)
#define TMU_SUPPORT_SHARED_MEMORY BIT(6)
#define TMU_SUPPORTS(a, b) (a->features & TMU_SUPPORT_ ## b)
/**
* struct exynos_tmu_register - register descriptors to access registers and
* bitfields. The register validity, offsets and bitfield values may vary
* slightly across different exynos SOC's.
* @triminfo_data: register containing 2 pont trimming data
* @triminfo_25_shift: shift bit of the 25 C trim value in triminfo_data reg.
* @triminfo_85_shift: shift bit of the 85 C trim value in triminfo_data reg.
* @triminfo_ctrl: trim info controller register.
* @triminfo_reload_shift: shift of triminfo reload enable bit in triminfo_ctrl
reg.
* @tmu_ctrl: TMU main controller register.
* @buf_vref_sel_shift: shift bits of reference voltage in tmu_ctrl register.
* @buf_vref_sel_mask: mask bits of reference voltage in tmu_ctrl register.
* @therm_trip_mode_shift: shift bits of tripping mode in tmu_ctrl register.
* @therm_trip_mode_mask: mask bits of tripping mode in tmu_ctrl register.
* @therm_trip_en_shift: shift bits of tripping enable in tmu_ctrl register.
* @buf_slope_sel_shift: shift bits of amplifier gain value in tmu_ctrl
register.
* @buf_slope_sel_mask: mask bits of amplifier gain value in tmu_ctrl register.
* @therm_trip_tq_en_shift: shift bits of thermal trip enable by TQ pin in
tmu_ctrl register.
* @core_en_shift: shift bits of TMU core enable bit in tmu_ctrl register.
* @tmu_status: register drescribing the TMU status.
* @tmu_cur_temp: register containing the current temperature of the TMU.
* @tmu_cur_temp_shift: shift bits of current temp value in tmu_cur_temp
register.
* @threshold_temp: register containing the base threshold level.
* @threshold_th0: Register containing first set of rising levels.
* @threshold_th0_l0_shift: shift bits of level0 threshold temperature.
* @threshold_th0_l1_shift: shift bits of level1 threshold temperature.
* @threshold_th0_l2_shift: shift bits of level2 threshold temperature.
* @threshold_th0_l3_shift: shift bits of level3 threshold temperature.
* @threshold_th1: Register containing second set of rising levels.
* @threshold_th1_l0_shift: shift bits of level0 threshold temperature.
* @threshold_th1_l1_shift: shift bits of level1 threshold temperature.
* @threshold_th1_l2_shift: shift bits of level2 threshold temperature.
* @threshold_th1_l3_shift: shift bits of level3 threshold temperature.
* @threshold_th2: Register containing third set of rising levels.
* @threshold_th2_l0_shift: shift bits of level0 threshold temperature.
* @threshold_th3: Register containing fourth set of rising levels.
* @threshold_th3_l0_shift: shift bits of level0 threshold temperature.
* @tmu_inten: register containing the different threshold interrupt
enable bits.
* @inten_rise_shift: shift bits of all rising interrupt bits.
* @inten_rise_mask: mask bits of all rising interrupt bits.
* @inten_fall_shift: shift bits of all rising interrupt bits.
* @inten_fall_mask: mask bits of all rising interrupt bits.
* @inten_rise0_shift: shift bits of rising 0 interrupt bits.
* @inten_rise1_shift: shift bits of rising 1 interrupt bits.
* @inten_rise2_shift: shift bits of rising 2 interrupt bits.
* @inten_rise3_shift: shift bits of rising 3 interrupt bits.
* @inten_fall0_shift: shift bits of falling 0 interrupt bits.
* @inten_fall1_shift: shift bits of falling 1 interrupt bits.
* @inten_fall2_shift: shift bits of falling 2 interrupt bits.
* @inten_fall3_shift: shift bits of falling 3 interrupt bits.
* @tmu_intstat: Register containing the interrupt status values.
* @tmu_intclear: Register for clearing the raised interrupt status.
* @emul_con: TMU emulation controller register.
* @emul_temp_shift: shift bits of emulation temperature.
* @emul_time_shift: shift bits of emulation time.
* @emul_time_mask: mask bits of emulation time.
* @tmu_irqstatus: register to find which TMU generated interrupts.
* @tmu_pmin: register to get/set the Pmin value.
*/
struct exynos_tmu_registers {
u32 triminfo_data;
u32 triminfo_25_shift;
u32 triminfo_85_shift;
u32 triminfo_ctrl;
u32 triminfo_reload_shift;
u32 tmu_ctrl;
u32 buf_vref_sel_shift;
u32 buf_vref_sel_mask;
u32 therm_trip_mode_shift;
u32 therm_trip_mode_mask;
u32 therm_trip_en_shift;
u32 buf_slope_sel_shift;
u32 buf_slope_sel_mask;
u32 therm_trip_tq_en_shift;
u32 core_en_shift;
u32 tmu_status;
u32 tmu_cur_temp;
u32 tmu_cur_temp_shift;
u32 threshold_temp;
u32 threshold_th0;
u32 threshold_th0_l0_shift;
u32 threshold_th0_l1_shift;
u32 threshold_th0_l2_shift;
u32 threshold_th0_l3_shift;
u32 threshold_th1;
u32 threshold_th1_l0_shift;
u32 threshold_th1_l1_shift;
u32 threshold_th1_l2_shift;
u32 threshold_th1_l3_shift;
u32 threshold_th2;
u32 threshold_th2_l0_shift;
u32 threshold_th3;
u32 threshold_th3_l0_shift;
u32 tmu_inten;
u32 inten_rise_shift;
u32 inten_rise_mask;
u32 inten_fall_shift;
u32 inten_fall_mask;
u32 inten_rise0_shift;
u32 inten_rise1_shift;
u32 inten_rise2_shift;
u32 inten_rise3_shift;
u32 inten_fall0_shift;
u32 inten_fall1_shift;
u32 inten_fall2_shift;
u32 inten_fall3_shift;
u32 tmu_intstat;
u32 tmu_intclear;
u32 emul_con;
u32 emul_temp_shift;
u32 emul_time_shift;
u32 emul_time_mask;
u32 tmu_irqstatus;
u32 tmu_pmin;
};
/**
* struct exynos_tmu_platform_data
* @threshold: basic temperature for generating interrupt
* 25 <= threshold <= 125 [unit: degree Celsius]
* @threshold_falling: differntial value for setting threshold
* of temperature falling interrupt.
* @trigger_levels: array for each interrupt levels
* [unit: degree Celsius]
* 0: temperature for trigger_level0 interrupt
* condition for trigger_level0 interrupt:
* current temperature > threshold + trigger_levels[0]
* 1: temperature for trigger_level1 interrupt
* condition for trigger_level1 interrupt:
* current temperature > threshold + trigger_levels[1]
* 2: temperature for trigger_level2 interrupt
* condition for trigger_level2 interrupt:
* current temperature > threshold + trigger_levels[2]
* 3: temperature for trigger_level3 interrupt
* condition for trigger_level3 interrupt:
* current temperature > threshold + trigger_levels[3]
* @trigger_type: defines the type of trigger. Possible values are,
* THROTTLE_ACTIVE trigger type
* THROTTLE_PASSIVE trigger type
* SW_TRIP trigger type
* HW_TRIP
* @trigger_enable[]: array to denote which trigger levels are enabled.
* 1 = enable trigger_level[] interrupt,
* 0 = disable trigger_level[] interrupt
* @max_trigger_level: max trigger level supported by the TMU
* @gain: gain of amplifier in the positive-TC generator block
* 0 <= gain <= 15
* @reference_voltage: reference voltage of amplifier
* in the positive-TC generator block
* 0 <= reference_voltage <= 31
* @noise_cancel_mode: noise cancellation mode
* 000, 100, 101, 110 and 111 can be different modes
* @type: determines the type of SOC
* @efuse_value: platform defined fuse value
* @min_efuse_value: minimum valid trimming data
* @max_efuse_value: maximum valid trimming data
* @first_point_trim: temp value of the first point trimming
* @second_point_trim: temp value of the second point trimming
* @default_temp_offset: default temperature offset in case of no trimming
* @cal_type: calibration type for temperature
* @cal_mode: calibration mode for temperature
* @freq_clip_table: Table representing frequency reduction percentage.
* @freq_tab_count: Count of the above table as frequency reduction may
* applicable to only some of the trigger levels.
* @registers: Pointer to structure containing all the TMU controller registers
* and bitfields shifts and masks.
* @features: a bitfield value indicating the features supported in SOC like
* emulation, multi instance etc
*
* This structure is required for configuration of exynos_tmu driver.
*/
struct exynos_tmu_platform_data {
u8 threshold;
u8 threshold_falling;
u8 trigger_levels[MAX_TRIP_COUNT];
enum trigger_type trigger_type[MAX_TRIP_COUNT];
bool trigger_enable[MAX_TRIP_COUNT];
u8 max_trigger_level;
u8 gain;
u8 reference_voltage;
u8 noise_cancel_mode;
u32 efuse_value;
u32 min_efuse_value;
u32 max_efuse_value;
u8 first_point_trim;
u8 second_point_trim;
u8 default_temp_offset;
enum calibration_type cal_type;
enum calibration_mode cal_mode;
enum soc_type type;
struct freq_clip_table freq_tab[4];
unsigned int freq_tab_count;
const struct exynos_tmu_registers *registers;
unsigned int features;
};
/**
* struct exynos_tmu_init_data
* @tmu_count: number of TMU instances.
* @tmu_data: platform data of all TMU instances.
* This structure is required to store data for multi-instance exynos tmu
* driver.
*/
struct exynos_tmu_init_data {
int tmu_count;
struct exynos_tmu_platform_data tmu_data[];
};
#endif /* _EXYNOS_TMU_H */
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