mirror of https://github.com/proxmox/mirror_qemu
tmp105: Create API for TMP105 temperature sensor.
* Define enum for TMP105 registers * Move tmp105_set() from I2C to TMP105 header * Document units and range of temperature as preconditions Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Alex Horn <alex.horn@cs.ox.ac.uk> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>master
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eac236ea7b
commit
2915efbfa8
3
hw/i2c.h
3
hw/i2c.h
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@ -73,9 +73,6 @@ void *wm8750_dac_buffer(void *opaque, int samples);
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void wm8750_dac_commit(void *opaque);
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void wm8750_set_bclk_in(void *opaque, int new_hz);
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/* tmp105.c */
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void tmp105_set(I2CSlave *i2c, int temp);
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/* lm832x.c */
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void lm832x_key_event(DeviceState *dev, int key, int state);
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17
hw/tmp105.c
17
hw/tmp105.c
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@ -20,6 +20,7 @@
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#include "hw.h"
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#include "i2c.h"
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#include "tmp105.h"
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typedef struct {
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I2CSlave i2c;
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@ -92,22 +93,22 @@ static void tmp105_read(TMP105State *s)
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}
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switch (s->pointer & 3) {
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case 0: /* Temperature */
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case TMP105_REG_TEMPERATURE:
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s->buf[s->len ++] = (((uint16_t) s->temperature) >> 8);
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s->buf[s->len ++] = (((uint16_t) s->temperature) >> 0) &
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(0xf0 << ((~s->config >> 5) & 3)); /* R */
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break;
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case 1: /* Configuration */
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case TMP105_REG_CONFIG:
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s->buf[s->len ++] = s->config;
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break;
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case 2: /* T_LOW */
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case TMP105_REG_T_LOW:
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s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 8;
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s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 0;
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break;
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case 3: /* T_HIGH */
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case TMP105_REG_T_HIGH:
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s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 8;
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s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 0;
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break;
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@ -117,10 +118,10 @@ static void tmp105_read(TMP105State *s)
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static void tmp105_write(TMP105State *s)
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{
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switch (s->pointer & 3) {
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case 0: /* Temperature */
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case TMP105_REG_TEMPERATURE:
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break;
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case 1: /* Configuration */
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case TMP105_REG_CONFIG:
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if (s->buf[0] & ~s->config & (1 << 0)) /* SD */
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printf("%s: TMP105 shutdown\n", __FUNCTION__);
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s->config = s->buf[0];
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@ -128,8 +129,8 @@ static void tmp105_write(TMP105State *s)
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tmp105_alarm_update(s);
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break;
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case 2: /* T_LOW */
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case 3: /* T_HIGH */
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case TMP105_REG_T_LOW:
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case TMP105_REG_T_HIGH:
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if (s->len >= 3)
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s->limit[s->pointer & 1] = (int16_t)
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((((uint16_t) s->buf[0]) << 8) | s->buf[1]);
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@ -0,0 +1,67 @@
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/*
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* Texas Instruments TMP105 Temperature Sensor
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*
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* Browse the data sheet:
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*
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* http://www.ti.com/lit/gpn/tmp105
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*
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* Copyright (C) 2012 Alex Horn <alex.horn@cs.ox.ac.uk>
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* Copyright (C) 2008-2012 Andrzej Zaborowski <balrogg@gmail.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_TMP105_H
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#define QEMU_TMP105_H
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#include "i2c.h"
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/**
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* TMP105Reg:
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* @TMP105_REG_TEMPERATURE: Temperature register
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* @TMP105_REG_CONFIG: Configuration register
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* @TMP105_REG_T_LOW: Low temperature register (also known as T_hyst)
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* @TMP105_REG_T_HIGH: High temperature register (also known as T_OS)
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*
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* The following temperature sensors are
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* compatible with the TMP105 registers:
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* - adt75
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* - ds1775
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* - ds75
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* - lm75
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* - lm75a
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* - max6625
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* - max6626
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* - mcp980x
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* - stds75
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* - tcn75
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* - tmp100
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* - tmp101
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* - tmp105
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* - tmp175
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* - tmp275
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* - tmp75
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**/
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typedef enum TMP105Reg {
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TMP105_REG_TEMPERATURE = 0,
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TMP105_REG_CONFIG,
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TMP105_REG_T_LOW,
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TMP105_REG_T_HIGH,
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} TMP105Reg;
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/**
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* tmp105_set:
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* @i2c: dispatcher to TMP105 hardware model
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* @temp: temperature with 0.001 centigrades units in the range -40 C to +125 C
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*
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* Sets the temperature of the TMP105 hardware model.
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*
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* Bits 5 and 6 (value 32 and 64) in the register indexed by TMP105_REG_CONFIG
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* determine the precision of the temperature. See Table 8 in the data sheet.
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*
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* @see_also: I2C_SLAVE macro
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* @see_also: http://www.ti.com/lit/gpn/tmp105
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*/
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void tmp105_set(I2CSlave *i2c, int temp);
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#endif
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