This patch adds support for the National LM63 temperature
sensor with integrated fan control. It's used on the GDSys
Neo board (405EP) which will be submitted later.
Signed-off-by: Dirk Eibach <[EMAIL PROTECTED]>
Acked-by: Stefan Roese <[EMAIL PROTECTED]>
---
drivers/hwmon/Makefile | 1 +
drivers/hwmon/lm63.c | 174
++++++++++++++++++++++++++++++++++++++++++++++++
include/dtt.h | 1 +
3 files changed, 176 insertions(+), 0 deletions(-)
create mode 100644 drivers/hwmon/lm63.c
diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile
index 7f7d3db..59302fa 100644
--- a/drivers/hwmon/Makefile
+++ b/drivers/hwmon/Makefile
@@ -35,6 +35,7 @@ COBJS-$(CONFIG_DTT_ADT7460) += adt7460.o
COBJS-$(CONFIG_DTT_DS1621) += ds1621.o
COBJS-$(CONFIG_DTT_DS1722) += ds1722.o
COBJS-$(CONFIG_DTT_DS1775) += ds1775.o
+COBJS-$(CONFIG_DTT_LM63) += lm63.o
COBJS-$(CONFIG_DTT_LM73) += lm73.o
COBJS-$(CONFIG_DTT_LM75) += lm75.o
COBJS-$(CONFIG_DTT_LM81) += lm81.o
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
new file mode 100644
index 0000000..03616e1
--- /dev/null
+++ b/drivers/hwmon/lm63.c
@@ -0,0 +1,174 @@
+/*
+ * (C) Copyright 2007-2008
+ * Dirk Eibach, Guntermann & Drunck GmbH, [EMAIL PROTECTED]
+ * based on lm75.c by Bill Hunter
+ *
+ * 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
+ */
+
+/*
+ * National LM63 Temperature Sensor
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <dtt.h>
+
+#define DTT_I2C_DEV_CODE 0x4C /* National LM63 device */
+
+#define DTT_READ_TEMP_RMT_MSB 0x01
+#define DTT_CONFIG 0x03
+#define DTT_READ_TEMP_RMT_LSB 0x10
+#define DTT_TACHLIM_LSB 0x48
+#define DTT_TACHLIM_MSB 0x49
+#define DTT_FAN_CONFIG 0x4A
+#define DTT_PWM_FREQ 0x4D
+#define DTT_PWM_LOOKUP_BASE 0x50
+
+struct pwm_lookup_entry {
+ u8 temp;
+ u8 pwm;
+};
+
+/*
+ * Device code
+ */
+
+int dtt_read(int sensor, int reg)
+{
+ int dlen;
+ uchar data[2];
+
+ /*
+ * Calculate sensor address and register.
+ */
+ sensor = DTT_I2C_DEV_CODE; /* address of lm63 is not
adjustable */
+
+ dlen = 1;
+
+ /*
+ * Now try to read the register.
+ */
+ if (i2c_read(sensor, reg, 1, data, dlen) != 0)
+ return -1;
+
+ return (int)data[0];
+} /* dtt_read() */
+
+int dtt_write(int sensor, int reg, int val)
+{
+ int dlen;
+ uchar data[2];
+
+ /*
+ * Calculate sensor address and register.
+ */
+ sensor = DTT_I2C_DEV_CODE; /* address of lm63 is not
adjustable */
+
+ dlen = 1;
+ data[0] = (char)(val & 0xff);
+
+ /*
+ * Write value to register.
+ */
+ if (i2c_write(sensor, reg, 1, data, dlen) != 0)
+ return 1;
+
+ return 0;
+} /* dtt_write() */
+
+static int _dtt_init(int sensor)
+{
+ int i;
+ int val;
+
+ struct pwm_lookup_entry pwm_lookup[] =
CONFIG_DTT_PWM_LOOKUPTABLE;
+
+ /*
+ * Set PWM Frequency to 2.5% resolution
+ */
+ val = 20;
+ if (dtt_write(sensor, DTT_PWM_FREQ, val) != 0)
+ return 1;
+
+ /*
+ * Set Tachometer Limit
+ */
+ val = CONFIG_DTT_TACH_LIMIT;
+ if (dtt_write(sensor, DTT_TACHLIM_LSB, val & 0xff) != 0)
+ return 1;
+ if (dtt_write(sensor, DTT_TACHLIM_MSB, (val >> 8) & 0xff) != 0)
+ return 1;
+
+ /*
+ * Setup PWM Lookup-Table
+ */
+ for (i = 0; i < sizeof(pwm_lookup) / sizeof(struct
pwm_lookup_entry);
+ i++) {
+ int address = DTT_PWM_LOOKUP_BASE + 2 * i;
+ val = pwm_lookup[i].temp;
+ if (dtt_write(sensor, address, val) != 0)
+ return 1;
+ val = pwm_lookup[i].pwm;
+ if (dtt_write(sensor, address + 1, val) != 0)
+ return 1;
+ }
+
+ /*
+ * Enable PWM Lookup-Table, PWM Clock 360 kHz, Tachometer Mode 2
+ */
+ val = 0x02;
+ if (dtt_write(sensor, DTT_FAN_CONFIG, val) != 0)
+ return 1;
+
+ /*
+ * Enable Tach input
+ */
+ val = dtt_read(sensor, DTT_CONFIG) | 0x04;
+ if (dtt_write(sensor, DTT_CONFIG, val) != 0)
+ return 1;
+
+ return 0;
+}
+
+int dtt_get_temp(int sensor)
+{
+ s16 temp = (dtt_read(sensor, DTT_READ_TEMP_RMT_MSB) << 8)
+ | (dtt_read(sensor, DTT_READ_TEMP_RMT_LSB));
+
+ /* Ignore LSB for now, U-Boot only prints natural numbers */
+ return temp >> 8;
+}
+
+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;
+}
diff --git a/include/dtt.h b/include/dtt.h
index 0c8ee76..965e82e 100644
--- a/include/dtt.h
+++ b/include/dtt.h
@@ -31,6 +31,7 @@
defined(CONFIG_DTT_ADT7460) || \
defined(CONFIG_DTT_DS1621) || \
defined(CONFIG_DTT_DS1775) || \
+ defined(CONFIG_DTT_LM63) || \
defined(CONFIG_DTT_LM73) || \
defined(CONFIG_DTT_LM75) || \
defined(CONFIG_DTT_LM81)
--
1.5.6.5
--------------------------------------------------------------------------
Guntermann & Drunck GmbH Systementwicklung
Dortmunder Str. 4a
D-57234 Wilnsdorf - Germany
Tel: +49 (0) 27 39 / 89 01 - 100 Fax: +49 (0) 27 39 / 89 01 - 120
E-Mail: mailto:[EMAIL PROTECTED] Web: www.gdsys.de
--------------------------------------------------------------------------
Geschaeftsfuehrer:
Udo Guntermann - Martin Drunck - Reiner Ruelmann - Klaus Tocke
HRB 2884, Amtsgericht Siegen - WEEE-Reg.-Nr. DE30763240
USt.-Id.-Nr. DE 126575222 - Steuer-Nr. 342 / 5835 / 1041
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