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@ -0,0 +1,425 @@
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/*
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* OMAP4 Bandgap temperature sensor driver
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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* Contact:
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* Eduardo Valentin <eduardo.valentin@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#ifndef __OMAP_BANDGAP_H
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#define __OMAP_BANDGAP_H
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include <linux/err.h>
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/* TEMP_SENSOR OMAP4430 */
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#define OMAP4430_BGAP_TSHUT_SHIFT 11
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#define OMAP4430_BGAP_TSHUT_MASK (1 << 11)
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/* TEMP_SENSOR OMAP4430 */
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#define OMAP4430_BGAP_TEMPSOFF_SHIFT 12
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#define OMAP4430_BGAP_TEMPSOFF_MASK (1 << 12)
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#define OMAP4430_SINGLE_MODE_SHIFT 10
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#define OMAP4430_SINGLE_MODE_MASK (1 << 10)
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#define OMAP4430_BGAP_TEMP_SENSOR_SOC_SHIFT 9
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#define OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK (1 << 9)
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#define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_SHIFT 8
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#define OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK (1 << 8)
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#define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_SHIFT 0
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#define OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK (0xff << 0)
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#define OMAP4430_ADC_START_VALUE 0
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#define OMAP4430_ADC_END_VALUE 127
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#define OMAP4430_MAX_FREQ 32768
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#define OMAP4430_MIN_FREQ 32768
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#define OMAP4430_MIN_TEMP -40000
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#define OMAP4430_MAX_TEMP 125000
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#define OMAP4430_HYST_VAL 5000
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/* TEMP_SENSOR OMAP4460 */
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#define OMAP4460_BGAP_TEMPSOFF_SHIFT 13
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#define OMAP4460_BGAP_TEMPSOFF_MASK (1 << 13)
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#define OMAP4460_BGAP_TEMP_SENSOR_SOC_SHIFT 11
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#define OMAP4460_BGAP_TEMP_SENSOR_SOC_MASK (1 << 11)
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#define OMAP4460_BGAP_TEMP_SENSOR_EOCZ_SHIFT 10
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#define OMAP4460_BGAP_TEMP_SENSOR_EOCZ_MASK (1 << 10)
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#define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_SHIFT 0
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#define OMAP4460_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
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/* BANDGAP_CTRL */
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#define OMAP4460_SINGLE_MODE_SHIFT 31
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#define OMAP4460_SINGLE_MODE_MASK (1 << 31)
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#define OMAP4460_MASK_HOT_SHIFT 1
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#define OMAP4460_MASK_HOT_MASK (1 << 1)
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#define OMAP4460_MASK_COLD_SHIFT 0
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#define OMAP4460_MASK_COLD_MASK (1 << 0)
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/* BANDGAP_COUNTER */
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#define OMAP4460_COUNTER_SHIFT 0
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#define OMAP4460_COUNTER_MASK (0xffffff << 0)
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/* BANDGAP_THRESHOLD */
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#define OMAP4460_T_HOT_SHIFT 16
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#define OMAP4460_T_HOT_MASK (0x3ff << 16)
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#define OMAP4460_T_COLD_SHIFT 0
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#define OMAP4460_T_COLD_MASK (0x3ff << 0)
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/* TSHUT_THRESHOLD */
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#define OMAP4460_TSHUT_HOT_SHIFT 16
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#define OMAP4460_TSHUT_HOT_MASK (0x3ff << 16)
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#define OMAP4460_TSHUT_COLD_SHIFT 0
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#define OMAP4460_TSHUT_COLD_MASK (0x3ff << 0)
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/* BANDGAP_STATUS */
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#define OMAP4460_CLEAN_STOP_SHIFT 3
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#define OMAP4460_CLEAN_STOP_MASK (1 << 3)
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#define OMAP4460_BGAP_ALERT_SHIFT 2
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#define OMAP4460_BGAP_ALERT_MASK (1 << 2)
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#define OMAP4460_HOT_FLAG_SHIFT 1
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#define OMAP4460_HOT_FLAG_MASK (1 << 1)
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#define OMAP4460_COLD_FLAG_SHIFT 0
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#define OMAP4460_COLD_FLAG_MASK (1 << 0)
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/* TEMP_SENSOR OMAP5430 */
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#define OMAP5430_BGAP_TEMP_SENSOR_SOC_SHIFT 12
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#define OMAP5430_BGAP_TEMP_SENSOR_SOC_MASK (1 << 12)
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#define OMAP5430_BGAP_TEMPSOFF_SHIFT 11
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#define OMAP5430_BGAP_TEMPSOFF_MASK (1 << 11)
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#define OMAP5430_BGAP_TEMP_SENSOR_EOCZ_SHIFT 10
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#define OMAP5430_BGAP_TEMP_SENSOR_EOCZ_MASK (1 << 10)
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#define OMAP5430_BGAP_TEMP_SENSOR_DTEMP_SHIFT 0
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#define OMAP5430_BGAP_TEMP_SENSOR_DTEMP_MASK (0x3ff << 0)
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/* BANDGAP_CTRL */
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#define OMAP5430_MASK_HOT_CORE_SHIFT 5
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#define OMAP5430_MASK_HOT_CORE_MASK (1 << 5)
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#define OMAP5430_MASK_COLD_CORE_SHIFT 4
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#define OMAP5430_MASK_COLD_CORE_MASK (1 << 4)
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#define OMAP5430_MASK_HOT_MM_SHIFT 3
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#define OMAP5430_MASK_HOT_MM_MASK (1 << 3)
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#define OMAP5430_MASK_COLD_MM_SHIFT 2
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#define OMAP5430_MASK_COLD_MM_MASK (1 << 2)
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#define OMAP5430_MASK_HOT_MPU_SHIFT 1
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#define OMAP5430_MASK_HOT_MPU_MASK (1 << 1)
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#define OMAP5430_MASK_COLD_MPU_SHIFT 0
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#define OMAP5430_MASK_COLD_MPU_MASK (1 << 0)
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/* BANDGAP_COUNTER */
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#define OMAP5430_REPEAT_MODE_SHIFT 31
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#define OMAP5430_REPEAT_MODE_MASK (1 << 31)
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#define OMAP5430_COUNTER_SHIFT 0
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#define OMAP5430_COUNTER_MASK (0xffffff << 0)
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/* BANDGAP_THRESHOLD */
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#define OMAP5430_T_HOT_SHIFT 16
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#define OMAP5430_T_HOT_MASK (0x3ff << 16)
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#define OMAP5430_T_COLD_SHIFT 0
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#define OMAP5430_T_COLD_MASK (0x3ff << 0)
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/* TSHUT_THRESHOLD */
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#define OMAP5430_TSHUT_HOT_SHIFT 16
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#define OMAP5430_TSHUT_HOT_MASK (0x3ff << 16)
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#define OMAP5430_TSHUT_COLD_SHIFT 0
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#define OMAP5430_TSHUT_COLD_MASK (0x3ff << 0)
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/* BANDGAP_STATUS */
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#define OMAP5430_BGAP_ALERT_SHIFT 31
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#define OMAP5430_BGAP_ALERT_MASK (1 << 31)
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#define OMAP5430_HOT_CORE_FLAG_SHIFT 5
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#define OMAP5430_HOT_CORE_FLAG_MASK (1 << 5)
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#define OMAP5430_COLD_CORE_FLAG_SHIFT 4
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#define OMAP5430_COLD_CORE_FLAG_MASK (1 << 4)
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#define OMAP5430_HOT_MM_FLAG_SHIFT 3
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#define OMAP5430_HOT_MM_FLAG_MASK (1 << 3)
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#define OMAP5430_COLD_MM_FLAG_SHIFT 2
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#define OMAP5430_COLD_MM_FLAG_MASK (1 << 2)
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#define OMAP5430_HOT_MPU_FLAG_SHIFT 1
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#define OMAP5430_HOT_MPU_FLAG_MASK (1 << 1)
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#define OMAP5430_COLD_MPU_FLAG_SHIFT 0
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#define OMAP5430_COLD_MPU_FLAG_MASK (1 << 0)
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/* Offsets from the base of temperature sensor registers */
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/* 4430 - All goes relative to OPP_BGAP */
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#define OMAP4430_FUSE_OPP_BGAP 0x0
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#define OMAP4430_TEMP_SENSOR_CTRL_OFFSET 0xCC
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/* 4460 - All goes relative to OPP_BGAP */
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#define OMAP4460_FUSE_OPP_BGAP 0x0
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#define OMAP4460_TEMP_SENSOR_CTRL_OFFSET 0xCC
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#define OMAP4460_BGAP_CTRL_OFFSET 0x118
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#define OMAP4460_BGAP_COUNTER_OFFSET 0x11C
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#define OMAP4460_BGAP_THRESHOLD_OFFSET 0x120
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#define OMAP4460_BGAP_TSHUT_OFFSET 0x124
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#define OMAP4460_BGAP_STATUS_OFFSET 0x128
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/* 5430 - All goes relative to OPP_BGAP_GPU */
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#define OMAP5430_FUSE_OPP_BGAP_GPU 0x0
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#define OMAP5430_TEMP_SENSOR_GPU_OFFSET 0x150
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#define OMAP5430_BGAP_COUNTER_GPU_OFFSET 0x1C0
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#define OMAP5430_BGAP_THRESHOLD_GPU_OFFSET 0x1A8
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#define OMAP5430_BGAP_TSHUT_GPU_OFFSET 0x1B4
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#define OMAP5430_FUSE_OPP_BGAP_MPU 0x4
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#define OMAP5430_TEMP_SENSOR_MPU_OFFSET 0x14C
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#define OMAP5430_BGAP_CTRL_OFFSET 0x1A0
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#define OMAP5430_BGAP_COUNTER_MPU_OFFSET 0x1BC
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#define OMAP5430_BGAP_THRESHOLD_MPU_OFFSET 0x1A4
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#define OMAP5430_BGAP_TSHUT_MPU_OFFSET 0x1B0
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#define OMAP5430_BGAP_STATUS_OFFSET 0x1C8
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#define OMAP5430_FUSE_OPP_BGAP_CORE 0x8
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#define OMAP5430_TEMP_SENSOR_CORE_OFFSET 0x154
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#define OMAP5430_BGAP_COUNTER_CORE_OFFSET 0x1C4
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#define OMAP5430_BGAP_THRESHOLD_CORE_OFFSET 0x1AC
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#define OMAP5430_BGAP_TSHUT_CORE_OFFSET 0x1B8
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#define OMAP4460_TSHUT_HOT 900 /* 122 deg C */
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#define OMAP4460_TSHUT_COLD 895 /* 100 deg C */
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#define OMAP4460_T_HOT 800 /* 73 deg C */
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#define OMAP4460_T_COLD 795 /* 71 deg C */
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#define OMAP4460_MAX_FREQ 1500000
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#define OMAP4460_MIN_FREQ 1000000
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#define OMAP4460_MIN_TEMP -40000
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#define OMAP4460_MAX_TEMP 123000
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#define OMAP4460_HYST_VAL 5000
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#define OMAP4460_ADC_START_VALUE 530
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#define OMAP4460_ADC_END_VALUE 932
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#define OMAP5430_MPU_TSHUT_HOT 915
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#define OMAP5430_MPU_TSHUT_COLD 900
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#define OMAP5430_MPU_T_HOT 800
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#define OMAP5430_MPU_T_COLD 795
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#define OMAP5430_MPU_MAX_FREQ 1500000
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#define OMAP5430_MPU_MIN_FREQ 1000000
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#define OMAP5430_MPU_MIN_TEMP -40000
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#define OMAP5430_MPU_MAX_TEMP 125000
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#define OMAP5430_MPU_HYST_VAL 5000
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#define OMAP5430_ADC_START_VALUE 532
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#define OMAP5430_ADC_END_VALUE 934
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#define OMAP5430_GPU_TSHUT_HOT 915
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#define OMAP5430_GPU_TSHUT_COLD 900
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#define OMAP5430_GPU_T_HOT 800
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#define OMAP5430_GPU_T_COLD 795
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#define OMAP5430_GPU_MAX_FREQ 1500000
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#define OMAP5430_GPU_MIN_FREQ 1000000
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#define OMAP5430_GPU_MIN_TEMP -40000
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#define OMAP5430_GPU_MAX_TEMP 125000
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#define OMAP5430_GPU_HYST_VAL 5000
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#define OMAP5430_CORE_TSHUT_HOT 915
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#define OMAP5430_CORE_TSHUT_COLD 900
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#define OMAP5430_CORE_T_HOT 800
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#define OMAP5430_CORE_T_COLD 795
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#define OMAP5430_CORE_MAX_FREQ 1500000
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#define OMAP5430_CORE_MIN_FREQ 1000000
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#define OMAP5430_CORE_MIN_TEMP -40000
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#define OMAP5430_CORE_MAX_TEMP 125000
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#define OMAP5430_CORE_HYST_VAL 5000
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/**
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* The register offsets and bit fields might change across
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* OMAP versions hence populating them in this structure.
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*/
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struct temp_sensor_registers {
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u32 temp_sensor_ctrl;
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u32 bgap_tempsoff_mask;
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u32 bgap_soc_mask;
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u32 bgap_eocz_mask;
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u32 bgap_dtemp_mask;
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u32 bgap_mask_ctrl;
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u32 mask_hot_mask;
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u32 mask_cold_mask;
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u32 bgap_mode_ctrl;
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u32 mode_ctrl_mask;
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u32 bgap_counter;
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u32 counter_mask;
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u32 bgap_threshold;
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u32 threshold_thot_mask;
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u32 threshold_tcold_mask;
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u32 tshut_threshold;
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u32 tshut_hot_mask;
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u32 tshut_cold_mask;
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u32 bgap_status;
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u32 status_clean_stop_mask;
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u32 status_bgap_alert_mask;
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u32 status_hot_mask;
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u32 status_cold_mask;
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u32 bgap_efuse;
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};
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/**
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* The thresholds and limits for temperature sensors.
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*/
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struct temp_sensor_data {
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u32 tshut_hot;
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u32 tshut_cold;
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u32 t_hot;
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u32 t_cold;
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u32 min_freq;
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u32 max_freq;
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int max_temp;
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int min_temp;
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int hyst_val;
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u32 adc_start_val;
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u32 adc_end_val;
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u32 update_int1;
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u32 update_int2;
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};
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struct omap_bandgap_data;
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/**
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* struct omap_bandgap - bandgap device structure
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* @dev: device pointer
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* @conf: platform data with sensor data
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* @fclock: pointer to functional clock of temperature sensor
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* @div_clk: pointer to parent clock of temperature sensor fclk
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* @conv_table: Pointer to adc to temperature conversion table
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* @bg_mutex: Mutex for sysfs, irq and PM
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* @irq: MPU Irq number for thermal alert
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* @tshut_gpio: GPIO where Tshut signal is routed
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* @clk_rate: Holds current clock rate
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*/
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struct omap_bandgap {
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struct device *dev;
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void __iomem *base;
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struct omap_bandgap_data *conf;
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struct clk *fclock;
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struct clk *div_clk;
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|
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const int *conv_table;
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|
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struct mutex bg_mutex; /* Mutex for irq and PM */
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|
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int irq;
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|
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int tshut_gpio;
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|
|
u32 clk_rate;
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|
|
};
|
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|
|
/**
|
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|
|
* struct temp_sensor_regval - temperature sensor register values
|
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|
|
* @bg_mode_ctrl: temp sensor control register value
|
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|
|
* @bg_ctrl: bandgap ctrl register value
|
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|
|
* @bg_counter: bandgap counter value
|
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|
|
* @bg_threshold: bandgap threshold register value
|
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|
|
* @tshut_threshold: bandgap tshut register value
|
|
|
|
|
*/
|
|
|
|
|
struct temp_sensor_regval {
|
|
|
|
|
u32 bg_mode_ctrl;
|
|
|
|
|
u32 bg_ctrl;
|
|
|
|
|
u32 bg_counter;
|
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|
|
|
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);
|
|
|
|
|
|
|
|
|
|
#endif
|