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/*
* OMAP4 Bandgap temperature sensor driver
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* Contact:
* Eduardo Valentin <eduardo.valentin@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#ifndef __OMAP_BANDGAP_H
#define __OMAP_BANDGAP_H
#include <linux/mutex.h>
#include <linux/types.h>
#include <linux/err.h>
/* TEMP_SENSOR OMAP4430 */
#define OMAP4430_BGAP_TSHUT_SHIFT 11
#define OMAP4430_BGAP_TSHUT_MASK (1 << 11)
/* TEMP_SENSOR OMAP4430 */
#define OMAP4430_BGAP_TEMPSOFF_SHIFT 12
#define OMAP4430_BGAP_TEMPSOFF_MASK (1 << 12)
#define OMAP4430_SINGLE_MODE_SHIFT 10
#define OMAP4430_SINGLE_MODE_MASK (1 << 10)
#define OMAP4430_BGAP_TEMP_SENSOR_SOC_SHIFT 9
#define OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK (1 << 9)
#define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_SHIFT 8
#define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK (1 << 8)
#define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_SHIFT 0
#define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK (0xff << 0)
#define OMAP4430_ADC_START_VALUE 0
#define OMAP4430_ADC_END_VALUE 127
#define OMAP4430_MAX_FREQ 32768
#define OMAP4430_MIN_FREQ 32768
#define OMAP4430_MIN_TEMP -40000
#define OMAP4430_MAX_TEMP 125000
#define OMAP4430_HYST_VAL 5000
/* TEMP_SENSOR OMAP4460 */
#define OMAP4460_BGAP_TEMPSOFF_SHIFT 13
#define OMAP4460_BGAP_TEMPSOFF_MASK (1 << 13)
#define OMAP4460_BGAP_TEMP_SENSOR_SOC_SHIFT 11
#define OMAP4460_BGAP_TEMP_SENSOR_SOC_MASK (1 << 11)
#define OMAP4460_BGAP_TEMP_SENSOR_EOCZ_SHIFT 10
#define OMAP4460_BGAP_TEMP_SENSOR_EOCZ_MASK (1 << 10)
#define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_SHIFT 0
#define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
/* BANDGAP_CTRL */
#define OMAP4460_SINGLE_MODE_SHIFT 31
#define OMAP4460_SINGLE_MODE_MASK (1 << 31)
#define OMAP4460_MASK_HOT_SHIFT 1
#define OMAP4460_MASK_HOT_MASK (1 << 1)
#define OMAP4460_MASK_COLD_SHIFT 0
#define OMAP4460_MASK_COLD_MASK (1 << 0)
/* BANDGAP_COUNTER */
#define OMAP4460_COUNTER_SHIFT 0
#define OMAP4460_COUNTER_MASK (0xffffff << 0)
/* BANDGAP_THRESHOLD */
#define OMAP4460_T_HOT_SHIFT 16
#define OMAP4460_T_HOT_MASK (0x3ff << 16)
#define OMAP4460_T_COLD_SHIFT 0
#define OMAP4460_T_COLD_MASK (0x3ff << 0)
/* TSHUT_THRESHOLD */
#define OMAP4460_TSHUT_HOT_SHIFT 16
#define OMAP4460_TSHUT_HOT_MASK (0x3ff << 16)
#define OMAP4460_TSHUT_COLD_SHIFT 0
#define OMAP4460_TSHUT_COLD_MASK (0x3ff << 0)
/* BANDGAP_STATUS */
#define OMAP4460_CLEAN_STOP_SHIFT 3
#define OMAP4460_CLEAN_STOP_MASK (1 << 3)
#define OMAP4460_BGAP_ALERT_SHIFT 2
#define OMAP4460_BGAP_ALERT_MASK (1 << 2)
#define OMAP4460_HOT_FLAG_SHIFT 1
#define OMAP4460_HOT_FLAG_MASK (1 << 1)
#define OMAP4460_COLD_FLAG_SHIFT 0
#define OMAP4460_COLD_FLAG_MASK (1 << 0)
/* TEMP_SENSOR OMAP5430 */
#define OMAP5430_BGAP_TEMP_SENSOR_SOC_SHIFT 12
#define OMAP5430_BGAP_TEMP_SENSOR_SOC_MASK (1 << 12)
#define OMAP5430_BGAP_TEMPSOFF_SHIFT 11
#define OMAP5430_BGAP_TEMPSOFF_MASK (1 << 11)
#define OMAP5430_BGAP_TEMP_SENSOR_EOCZ_SHIFT 10
#define OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK (1 << 10)
#define OMAP5430_BGAP_TEMP_SENSOR_DTEMP_SHIFT 0
#define OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
/* BANDGAP_CTRL */
#define OMAP5430_MASK_HOT_CORE_SHIFT 5
#define OMAP5430_MASK_HOT_CORE_MASK (1 << 5)
#define OMAP5430_MASK_COLD_CORE_SHIFT 4
#define OMAP5430_MASK_COLD_CORE_MASK (1 << 4)
#define OMAP5430_MASK_HOT_MM_SHIFT 3
#define OMAP5430_MASK_HOT_MM_MASK (1 << 3)
#define OMAP5430_MASK_COLD_MM_SHIFT 2
#define OMAP5430_MASK_COLD_MM_MASK (1 << 2)
#define OMAP5430_MASK_HOT_MPU_SHIFT 1
#define OMAP5430_MASK_HOT_MPU_MASK (1 << 1)
#define OMAP5430_MASK_COLD_MPU_SHIFT 0
#define OMAP5430_MASK_COLD_MPU_MASK (1 << 0)
/* BANDGAP_COUNTER */
#define OMAP5430_REPEAT_MODE_SHIFT 31
#define OMAP5430_REPEAT_MODE_MASK (1 << 31)
#define OMAP5430_COUNTER_SHIFT 0
#define OMAP5430_COUNTER_MASK (0xffffff << 0)
/* BANDGAP_THRESHOLD */
#define OMAP5430_T_HOT_SHIFT 16
#define OMAP5430_T_HOT_MASK (0x3ff << 16)
#define OMAP5430_T_COLD_SHIFT 0
#define OMAP5430_T_COLD_MASK (0x3ff << 0)
/* TSHUT_THRESHOLD */
#define OMAP5430_TSHUT_HOT_SHIFT 16
#define OMAP5430_TSHUT_HOT_MASK (0x3ff << 16)
#define OMAP5430_TSHUT_COLD_SHIFT 0
#define OMAP5430_TSHUT_COLD_MASK (0x3ff << 0)
/* BANDGAP_STATUS */
#define OMAP5430_BGAP_ALERT_SHIFT 31
#define OMAP5430_BGAP_ALERT_MASK (1 << 31)
#define OMAP5430_HOT_CORE_FLAG_SHIFT 5
#define OMAP5430_HOT_CORE_FLAG_MASK (1 << 5)
#define OMAP5430_COLD_CORE_FLAG_SHIFT 4
#define OMAP5430_COLD_CORE_FLAG_MASK (1 << 4)
#define OMAP5430_HOT_MM_FLAG_SHIFT 3
#define OMAP5430_HOT_MM_FLAG_MASK (1 << 3)
#define OMAP5430_COLD_MM_FLAG_SHIFT 2
#define OMAP5430_COLD_MM_FLAG_MASK (1 << 2)
#define OMAP5430_HOT_MPU_FLAG_SHIFT 1
#define OMAP5430_HOT_MPU_FLAG_MASK (1 << 1)
#define OMAP5430_COLD_MPU_FLAG_SHIFT 0
#define OMAP5430_COLD_MPU_FLAG_MASK (1 << 0)
/* Offsets from the base of temperature sensor registers */
/* 4430 - All goes relative to OPP_BGAP */
#define OMAP4430_FUSE_OPP_BGAP 0x0
#define OMAP4430_TEMP_SENSOR_CTRL_OFFSET 0xCC
/* 4460 - All goes relative to OPP_BGAP */
#define OMAP4460_FUSE_OPP_BGAP 0x0
#define OMAP4460_TEMP_SENSOR_CTRL_OFFSET 0xCC
#define OMAP4460_BGAP_CTRL_OFFSET 0x118
#define OMAP4460_BGAP_COUNTER_OFFSET 0x11C
#define OMAP4460_BGAP_THRESHOLD_OFFSET 0x120
#define OMAP4460_BGAP_TSHUT_OFFSET 0x124
#define OMAP4460_BGAP_STATUS_OFFSET 0x128
/* 5430 - All goes relative to OPP_BGAP_GPU */
#define OMAP5430_FUSE_OPP_BGAP_GPU 0x0
#define OMAP5430_TEMP_SENSOR_GPU_OFFSET 0x150
#define OMAP5430_BGAP_COUNTER_GPU_OFFSET 0x1C0
#define OMAP5430_BGAP_THRESHOLD_GPU_OFFSET 0x1A8
#define OMAP5430_BGAP_TSHUT_GPU_OFFSET 0x1B4
#define OMAP5430_FUSE_OPP_BGAP_MPU 0x4
#define OMAP5430_TEMP_SENSOR_MPU_OFFSET 0x14C
#define OMAP5430_BGAP_CTRL_OFFSET 0x1A0
#define OMAP5430_BGAP_COUNTER_MPU_OFFSET 0x1BC
#define OMAP5430_BGAP_THRESHOLD_MPU_OFFSET 0x1A4
#define OMAP5430_BGAP_TSHUT_MPU_OFFSET 0x1B0
#define OMAP5430_BGAP_STATUS_OFFSET 0x1C8
#define OMAP5430_FUSE_OPP_BGAP_CORE 0x8
#define OMAP5430_TEMP_SENSOR_CORE_OFFSET 0x154
#define OMAP5430_BGAP_COUNTER_CORE_OFFSET 0x1C4
#define OMAP5430_BGAP_THRESHOLD_CORE_OFFSET 0x1AC
#define OMAP5430_BGAP_TSHUT_CORE_OFFSET 0x1B8
#define OMAP4460_TSHUT_HOT 900 /* 122 deg C */
#define OMAP4460_TSHUT_COLD 895 /* 100 deg C */
#define OMAP4460_T_HOT 800 /* 73 deg C */
#define OMAP4460_T_COLD 795 /* 71 deg C */
#define OMAP4460_MAX_FREQ 1500000
#define OMAP4460_MIN_FREQ 1000000
#define OMAP4460_MIN_TEMP -40000
#define OMAP4460_MAX_TEMP 123000
#define OMAP4460_HYST_VAL 5000
#define OMAP4460_ADC_START_VALUE 530
#define OMAP4460_ADC_END_VALUE 932
#define OMAP5430_MPU_TSHUT_HOT 915
#define OMAP5430_MPU_TSHUT_COLD 900
#define OMAP5430_MPU_T_HOT 800
#define OMAP5430_MPU_T_COLD 795
#define OMAP5430_MPU_MAX_FREQ 1500000
#define OMAP5430_MPU_MIN_FREQ 1000000
#define OMAP5430_MPU_MIN_TEMP -40000
#define OMAP5430_MPU_MAX_TEMP 125000
#define OMAP5430_MPU_HYST_VAL 5000
#define OMAP5430_ADC_START_VALUE 532
#define OMAP5430_ADC_END_VALUE 934
#define OMAP5430_GPU_TSHUT_HOT 915
#define OMAP5430_GPU_TSHUT_COLD 900
#define OMAP5430_GPU_T_HOT 800
#define OMAP5430_GPU_T_COLD 795
#define OMAP5430_GPU_MAX_FREQ 1500000
#define OMAP5430_GPU_MIN_FREQ 1000000
#define OMAP5430_GPU_MIN_TEMP -40000
#define OMAP5430_GPU_MAX_TEMP 125000
#define OMAP5430_GPU_HYST_VAL 5000
#define OMAP5430_CORE_TSHUT_HOT 915
#define OMAP5430_CORE_TSHUT_COLD 900
#define OMAP5430_CORE_T_HOT 800
#define OMAP5430_CORE_T_COLD 795
#define OMAP5430_CORE_MAX_FREQ 1500000
#define OMAP5430_CORE_MIN_FREQ 1000000
#define OMAP5430_CORE_MIN_TEMP -40000
#define OMAP5430_CORE_MAX_TEMP 125000
#define OMAP5430_CORE_HYST_VAL 5000
/**
* The register offsets and bit fields might change across
* OMAP versions hence populating them in this structure.
*/
struct temp_sensor_registers {
u32 temp_sensor_ctrl;
u32 bgap_tempsoff_mask;
u32 bgap_soc_mask;
u32 bgap_eocz_mask;
u32 bgap_dtemp_mask;
u32 bgap_mask_ctrl;
u32 mask_hot_mask;
u32 mask_cold_mask;
u32 bgap_mode_ctrl;
u32 mode_ctrl_mask;
u32 bgap_counter;
u32 counter_mask;
u32 bgap_threshold;
u32 threshold_thot_mask;
u32 threshold_tcold_mask;
u32 tshut_threshold;
u32 tshut_hot_mask;
u32 tshut_cold_mask;
u32 bgap_status;
u32 status_clean_stop_mask;
u32 status_bgap_alert_mask;
u32 status_hot_mask;
u32 status_cold_mask;
u32 bgap_efuse;
};
/**
* The thresholds and limits for temperature sensors.
*/
struct temp_sensor_data {
u32 tshut_hot;
u32 tshut_cold;
u32 t_hot;
u32 t_cold;
u32 min_freq;
u32 max_freq;
int max_temp;
int min_temp;
int hyst_val;
u32 adc_start_val;
u32 adc_end_val;
u32 update_int1;
u32 update_int2;
};
struct omap_bandgap_data;
/**
* struct omap_bandgap - bandgap device structure
* @dev: device pointer
* @conf: platform data with sensor data
* @fclock: pointer to functional clock of temperature sensor
* @div_clk: pointer to parent clock of temperature sensor fclk
* @conv_table: Pointer to adc to temperature conversion table
* @bg_mutex: Mutex for sysfs, irq and PM
* @irq: MPU Irq number for thermal alert
* @tshut_gpio: GPIO where Tshut signal is routed
* @clk_rate: Holds current clock rate
*/
struct omap_bandgap {
struct device *dev;
void __iomem *base;
struct omap_bandgap_data *conf;
struct clk *fclock;
struct clk *div_clk;
const int *conv_table;
struct mutex bg_mutex; /* Mutex for irq and PM */
int irq;
int tshut_gpio;
u32 clk_rate;
};
/**
* struct temp_sensor_regval - temperature sensor register values
* @bg_mode_ctrl: temp sensor control register value
* @bg_ctrl: bandgap ctrl register value
* @bg_counter: bandgap counter value
* @bg_threshold: bandgap threshold register value
* @tshut_threshold: bandgap tshut register value
*/
struct temp_sensor_regval {
u32 bg_mode_ctrl;
u32 bg_ctrl;
u32 bg_counter;
u32 bg_threshold;
u32 tshut_threshold;
};
/**
* struct thermal_cooling_conf - description on how to cool a thermal zone
* @freq_clip_count: size of freq_data
*/
struct thermal_cooling_conf {
int freq_clip_count;
};
/**
* struct omap_temp_sensor - bandgap temperature sensor platform data
* @ts_data: pointer to struct with thresholds, limits of temperature sensor
* @registers: pointer to the list of register offsets and bitfields
* @regval: temperature sensor register values
* @domain: the name of the domain where the sensor is located
* @cooling_data: description on how the zone should be cooled off.
* @slope: sensor gradient slope info for hotspot extrapolation
* @const: sensor gradient const info for hotspot extrapolation
* @slope_pcb: sensor gradient slope info for hotspot extrapolation
* with no external influence
* @const_pcb: sensor gradient const info for hotspot extrapolation
* with no external influence
* @data: private data
* @register_cooling: function to describe how this sensor is going to be cooled
* @unregister_cooling: function to release cooling data
*/
struct omap_temp_sensor {
struct temp_sensor_data *ts_data;
struct temp_sensor_registers *registers;
struct temp_sensor_regval regval;
char *domain;
struct thermal_cooling_conf cooling_data;
/* for hotspot extrapolation */
const int slope;
const int constant;
const int slope_pcb;
const int constant_pcb;
void *data;
int (*register_cooling)(struct omap_bandgap *bg_ptr, int id);
int (*unregister_cooling)(struct omap_bandgap *bg_ptr, int id);
};
/**
* struct omap_bandgap_data - bandgap platform data structure
* @features: a bitwise flag set to describe the device features
* @conv_table: Pointer to adc to temperature conversion table
* @fclock_name: clock name of the functional clock
* @div_ck_nme: clock name of the clock divisor
* @sensor_count: count of temperature sensor device in scm
* @sensors: array of sensors present in this bandgap instance
* @expose_sensor: callback to export sensor to thermal API
*/
struct omap_bandgap_data {
#define OMAP_BANDGAP_FEATURE_TSHUT (1 << 0)
#define OMAP_BANDGAP_FEATURE_TSHUT_CONFIG (1 << 1)
#define OMAP_BANDGAP_FEATURE_TALERT (1 << 2)
#define OMAP_BANDGAP_FEATURE_MODE_CONFIG (1 << 3)
#define OMAP_BANDGAP_FEATURE_COUNTER (1 << 4)
#define OMAP_BANDGAP_FEATURE_POWER_SWITCH (1 << 5)
#define OMAP_BANDGAP_HAS(b, f) \
((b)->conf->features & OMAP_BANDGAP_FEATURE_ ## f)
unsigned int features;
const int *conv_table;
char *fclock_name;
char *div_ck_name;
int sensor_count;
int (*report_temperature)(struct omap_bandgap *bg_ptr, int id);
int (*expose_sensor)(struct omap_bandgap *bg_ptr, int id, char *domain);
int (*remove_sensor)(struct omap_bandgap *bg_ptr, int id);
/* this needs to be at the end */
struct omap_temp_sensor sensors[];
};
int omap_bandgap_read_thot(struct omap_bandgap *bg_ptr, int id, int *thot);
int omap_bandgap_write_thot(struct omap_bandgap *bg_ptr, int id, int val);
int omap_bandgap_read_tcold(struct omap_bandgap *bg_ptr, int id, int *tcold);
int omap_bandgap_write_tcold(struct omap_bandgap *bg_ptr, int id, int val);
int omap_bandgap_read_update_interval(struct omap_bandgap *bg_ptr, int id,
int *interval);
int omap_bandgap_write_update_interval(struct omap_bandgap *bg_ptr, int id,
u32 interval);
int omap_bandgap_read_temperature(struct omap_bandgap *bg_ptr, int id,
int *temperature);
int omap_bandgap_set_sensor_data(struct omap_bandgap *bg_ptr, int id,
void *data);
void *omap_bandgap_get_sensor_data(struct omap_bandgap *bg_ptr, int id);
#ifdef CONFIG_OMAP4_THERMAL
extern const struct omap_bandgap_data omap4430_data;
extern const struct omap_bandgap_data omap4460_data;
extern const struct omap_bandgap_data omap4470_data;
#else
#define omap4430_data NULL
#define omap4460_data NULL
#define omap4470_data NULL
#endif
#ifdef CONFIG_OMAP5_THERMAL
extern const struct omap_bandgap_data omap5430_data;
#else
#define omap5430_data NULL
#endif
#endif
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