mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-31 14:28:52 +09:00
202 lines
4.9 KiB
C
202 lines
4.9 KiB
C
/*
|
|
* (C) Copyright 2003
|
|
* Murray Jensen, CSIRO-MIT, Murray.Jensen@csiro.au
|
|
*
|
|
* based on dtt/lm75.c which is ...
|
|
*
|
|
* (C) Copyright 2001
|
|
* Bill Hunter, Wave 7 Optics, williamhunter@mediaone.net
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* Analog Devices's ADM1021
|
|
* "Low Cost Microprocessor System Temperature Monitor"
|
|
*/
|
|
|
|
#include <common.h>
|
|
|
|
#include <i2c.h>
|
|
#include <dtt.h>
|
|
|
|
#define DTT_READ_LOC_VALUE 0x00
|
|
#define DTT_READ_REM_VALUE 0x01
|
|
#define DTT_READ_STATUS 0x02
|
|
#define DTT_READ_CONFIG 0x03
|
|
#define DTT_READ_CONVRATE 0x04
|
|
#define DTT_READ_LOC_HIGHLIM 0x05
|
|
#define DTT_READ_LOC_LOWLIM 0x06
|
|
#define DTT_READ_REM_HIGHLIM 0x07
|
|
#define DTT_READ_REM_LOWLIM 0x08
|
|
#define DTT_READ_DEVID 0xfe
|
|
|
|
#define DTT_WRITE_CONFIG 0x09
|
|
#define DTT_WRITE_CONVRATE 0x0a
|
|
#define DTT_WRITE_LOC_HIGHLIM 0x0b
|
|
#define DTT_WRITE_LOC_LOWLIM 0x0c
|
|
#define DTT_WRITE_REM_HIGHLIM 0x0d
|
|
#define DTT_WRITE_REM_LOWLIM 0x0e
|
|
#define DTT_WRITE_ONESHOT 0x0f
|
|
|
|
#define DTT_STATUS_BUSY 0x80 /* 1=ADC Converting */
|
|
#define DTT_STATUS_LHIGH 0x40 /* 1=Local High Temp Limit Tripped */
|
|
#define DTT_STATUS_LLOW 0x20 /* 1=Local Low Temp Limit Tripped */
|
|
#define DTT_STATUS_RHIGH 0x10 /* 1=Remote High Temp Limit Tripped */
|
|
#define DTT_STATUS_RLOW 0x08 /* 1=Remote Low Temp Limit Tripped */
|
|
#define DTT_STATUS_OPEN 0x04 /* 1=Remote Sensor Open-Circuit */
|
|
|
|
#define DTT_CONFIG_ALERT_MASKED 0x80 /* 0=ALERT Enabled, 1=ALERT Masked */
|
|
#define DTT_CONFIG_STANDBY 0x40 /* 0=Run, 1=Standby */
|
|
|
|
#define DTT_ADM1021_DEVID 0x41
|
|
|
|
typedef
|
|
struct {
|
|
uint i2c_addr:7; /* 7bit i2c chip address */
|
|
uint conv_rate:3; /* conversion rate */
|
|
uint enable_alert:1; /* enable alert output pin */
|
|
uint enable_local:1; /* enable internal temp sensor */
|
|
uint max_local:8; /* internal temp maximum */
|
|
uint min_local:8; /* internal temp minimum */
|
|
uint enable_remote:1; /* enable remote temp sensor */
|
|
uint max_remote:8; /* remote temp maximum */
|
|
uint min_remote:8; /* remote temp minimum */
|
|
}
|
|
dtt_cfg_t;
|
|
|
|
dtt_cfg_t dttcfg[] = CONFIG_SYS_DTT_ADM1021;
|
|
|
|
int
|
|
dtt_read (int sensor, int reg)
|
|
{
|
|
dtt_cfg_t *dcp = &dttcfg[sensor >> 1];
|
|
uchar data;
|
|
|
|
if (i2c_read(dcp->i2c_addr, reg, 1, &data, 1) != 0)
|
|
return -1;
|
|
|
|
return (int)data;
|
|
} /* dtt_read() */
|
|
|
|
int
|
|
dtt_write (int sensor, int reg, int val)
|
|
{
|
|
dtt_cfg_t *dcp = &dttcfg[sensor >> 1];
|
|
uchar data;
|
|
|
|
data = (uchar)(val & 0xff);
|
|
|
|
if (i2c_write(dcp->i2c_addr, reg, 1, &data, 1) != 0)
|
|
return 1;
|
|
|
|
return 0;
|
|
} /* dtt_write() */
|
|
|
|
static int
|
|
_dtt_init (int sensor)
|
|
{
|
|
dtt_cfg_t *dcp = &dttcfg[sensor >> 1];
|
|
int reg, val;
|
|
|
|
if (((sensor & 1) == 0 ? dcp->enable_local : dcp->enable_remote) == 0)
|
|
return 1; /* sensor is disabled (or rather ignored) */
|
|
|
|
/*
|
|
* Setup High Limit register
|
|
*/
|
|
if ((sensor & 1) == 0) {
|
|
reg = DTT_WRITE_LOC_HIGHLIM;
|
|
val = dcp->max_local;
|
|
}
|
|
else {
|
|
reg = DTT_WRITE_REM_HIGHLIM;
|
|
val = dcp->max_remote;
|
|
}
|
|
if (dtt_write (sensor, reg, val) != 0)
|
|
return 1;
|
|
|
|
/*
|
|
* Setup Low Limit register
|
|
*/
|
|
if ((sensor & 1) == 0) {
|
|
reg = DTT_WRITE_LOC_LOWLIM;
|
|
val = dcp->min_local;
|
|
}
|
|
else {
|
|
reg = DTT_WRITE_REM_LOWLIM;
|
|
val = dcp->min_remote;
|
|
}
|
|
if (dtt_write (sensor, reg, val) != 0)
|
|
return 1;
|
|
|
|
/* shouldn't hurt if the rest gets done twice */
|
|
|
|
/*
|
|
* Setup Conversion Rate register
|
|
*/
|
|
if (dtt_write (sensor, DTT_WRITE_CONVRATE, dcp->conv_rate) != 0)
|
|
return 1;
|
|
|
|
/*
|
|
* Setup configuraton register
|
|
*/
|
|
val = 0; /* running */
|
|
if (dcp->enable_alert == 0)
|
|
val |= DTT_CONFIG_ALERT_MASKED; /* mask ALERT pin */
|
|
if (dtt_write (sensor, DTT_WRITE_CONFIG, val) != 0)
|
|
return 1;
|
|
|
|
return 0;
|
|
} /* _dtt_init() */
|
|
|
|
int
|
|
dtt_init (void)
|
|
{
|
|
int i;
|
|
unsigned char sensors[] = CONFIG_DTT_SENSORS;
|
|
const char *const header = "DTT: ";
|
|
|
|
/* switch to correct I2C bus */
|
|
I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
|
|
|
|
for (i = 0; i < sizeof(sensors); i++) {
|
|
if (_dtt_init(sensors[i]) != 0)
|
|
printf ("%s%d FAILED INIT\n", header, i+1);
|
|
else
|
|
printf ("%s%d is %i C\n", header, i+1,
|
|
dtt_get_temp(sensors[i]));
|
|
}
|
|
|
|
return (0);
|
|
} /* dtt_init() */
|
|
|
|
int
|
|
dtt_get_temp (int sensor)
|
|
{
|
|
signed char val;
|
|
|
|
if ((sensor & 1) == 0)
|
|
val = dtt_read(sensor, DTT_READ_LOC_VALUE);
|
|
else
|
|
val = dtt_read(sensor, DTT_READ_REM_VALUE);
|
|
|
|
return (int) val;
|
|
} /* dtt_get_temp() */
|