Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / hwmon / adm1021.c

diff --git a/qemu/roms/u-boot/drivers/hwmon/adm1021.c b/qemu/roms/u-boot/drivers/hwmon/adm1021.c
new file mode 100644 (file)
index 0000000..99e942b
--- /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() */