1 files changed, 164 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/drivers/hwmon/adm1021.c b/qemu/roms/u-boot/drivers/hwmon/adm1021.c
new file mode 100644
index 000000000..99e942b49
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/hwmon/adm1021.c
@@ -0,0 +1,164 @@
+/*
+ * (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
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * 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() */
+
+int
+dtt_init_one(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_one() */
+
+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() */