Merge with git://www.denx.de/git/u-boot.git

1 files changed, 174 insertions, 0 deletions

diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
new file mode 100644
index 0000000..9f65cfb
--- /dev/null
+++ b/drivers/hwmon/adm1021.c
@@ -0,0 +1,174 @@
+/*
+ * (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:   ";
+
+	/* switch to correct I2C bus */
+	I2C_SET_BUS(CFG_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() */
+
+#endif /* CONFIG_DTT_ADM1021 */