u-boot/dtt/adm1021.c
wdenk 6dd652fa4d Patches by Murray Jensen, 17 Jun 2003:
- Hymod board database mods: add "who" field and new xilinx chip types
- provide new "init_cmd_timeout()" function so code external to
  "common/main.c" can use the "reset_cmd_timeout()" function before
  entering the main loop
- add DTT support for adm1021 (new file dtt/adm1021.c; config
  slightly different. see include/configs/hymod.h for an example
  (requires CONFIG_DTT_ADM1021, CONFIG_DTT_SENSORS, and
  CFG_DTT_ADM1021 defined)
- add new "eeprom_probe()" function which has similar args and
  behaves in a similar way to "eeprom_read()" etc.
- add 8260 FCC ethernet loopback code (new "eth_loopback_test()"
  function which is enabled by defining CONFIG_ETHER_LOOPBACK_TEST)
- gdbtools copyright update
- ensure that set_msr() executes the "sync" and "isync" instructions
  after the "mtmsr" instruction in cpu/mpc8260/interrupts.c
- 8260 I/O ports fix: Open Drain should be set last when configuring
- add SIU IRQ defines for 8260
- allow LDSCRIPT override and OBJCFLAGS initialization: change to
  config.mk to allow board configurations to override the GNU
  linker script, selected via the LDSCRIPT, make variable, and to
  give an initial value to the OBJCFLAGS make variable
- 8260 i2c enhancement:
  o correctly extends the timeout depending on the size of all
    queued messages for both transmit and receive
  o will not continue with receive if transmit times out
  o ensures that the error callback is done for all queued tx
    and rx messages
  o correctly detects both tx and rx timeouts, only delivers one to
    the callback, and does not overwrite an earlier error
  o logic in i2c_probe now correct
- add "vprintf()" function so that "panic()" function can be
  technically correct
- many Hymod board changes
2003-06-19 23:40:20 +00:00

171 lines
3.8 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>
#ifdef CONFIG_DTT_ADM1021
#include <i2c.h>
#include <dtt.h>
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[] = CFG_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: ";
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() */
#endif /* CONFIG_DTT_ADM1021 */