sensor: Move hardware sensors from misc to a sensor directory

Lots of this are expected to be coming in, create a directory for them.

Also move the tmp105.h file into the include directory where it
should be.

Cc: Cédric Le Goater <clg@kaod.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Andrew Jeffery <andrew@aj.id.au>
Cc: Joel Stanley <joel@jms.id.au>
Cc: Andrzej Zaborowski <balrogg@gmail.com>
Cc: qemu-arm@nongnu.org
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Acked-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 328 insertions, 0 deletions

diff --git a/hw/sensor/tmp105.c b/hw/sensor/tmp105.c
new file mode 100644
index 0000000..2056449
--- /dev/null
+++ b/hw/sensor/tmp105.c
@@ -0,0 +1,328 @@
+/*
+ * Texas Instruments TMP105 temperature sensor.
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Written by Andrzej Zaborowski <andrew@openedhand.com>
+ *
+ * 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 or
+ * (at your option) version 3 of the License.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/i2c/i2c.h"
+#include "hw/irq.h"
+#include "migration/vmstate.h"
+#include "hw/sensor/tmp105.h"
+#include "qapi/error.h"
+#include "qapi/visitor.h"
+#include "qemu/module.h"
+
+static void tmp105_interrupt_update(TMP105State *s)
+{
+    qemu_set_irq(s->pin, s->alarm ^ ((~s->config >> 2) & 1));	/* POL */
+}
+
+static void tmp105_alarm_update(TMP105State *s)
+{
+    if ((s->config >> 0) & 1) {					/* SD */
+        if ((s->config >> 7) & 1)				/* OS */
+            s->config &= ~(1 << 7);				/* OS */
+        else
+            return;
+    }
+
+    if (s->config >> 1 & 1) {
+        /*
+         * TM == 1 : Interrupt mode. We signal Alert when the
+         * temperature rises above T_high, and expect the guest to clear
+         * it (eg by reading a device register).
+         */
+        if (s->detect_falling) {
+            if (s->temperature < s->limit[0]) {
+                s->alarm = 1;
+                s->detect_falling = false;
+            }
+        } else {
+            if (s->temperature >= s->limit[1]) {
+                s->alarm = 1;
+                s->detect_falling = true;
+            }
+        }
+    } else {
+        /*
+         * TM == 0 : Comparator mode. We signal Alert when the temperature
+         * rises above T_high, and stop signalling it when the temperature
+         * falls below T_low.
+         */
+        if (s->detect_falling) {
+            if (s->temperature < s->limit[0]) {
+                s->alarm = 0;
+                s->detect_falling = false;
+            }
+        } else {
+            if (s->temperature >= s->limit[1]) {
+                s->alarm = 1;
+                s->detect_falling = true;
+            }
+        }
+    }
+
+    tmp105_interrupt_update(s);
+}
+
+static void tmp105_get_temperature(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    TMP105State *s = TMP105(obj);
+    int64_t value = s->temperature * 1000 / 256;
+
+    visit_type_int(v, name, &value, errp);
+}
+
+/* Units are 0.001 centigrades relative to 0 C.  s->temperature is 8.8
+ * fixed point, so units are 1/256 centigrades.  A simple ratio will do.
+ */
+static void tmp105_set_temperature(Object *obj, Visitor *v, const char *name,
+                                   void *opaque, Error **errp)
+{
+    TMP105State *s = TMP105(obj);
+    int64_t temp;
+
+    if (!visit_type_int(v, name, &temp, errp)) {
+        return;
+    }
+    if (temp >= 128000 || temp < -128000) {
+        error_setg(errp, "value %" PRId64 ".%03" PRIu64 " C is out of range",
+                   temp / 1000, temp % 1000);
+        return;
+    }
+
+    s->temperature = (int16_t) (temp * 256 / 1000);
+
+    tmp105_alarm_update(s);
+}
+
+static const int tmp105_faultq[4] = { 1, 2, 4, 6 };
+
+static void tmp105_read(TMP105State *s)
+{
+    s->len = 0;
+
+    if ((s->config >> 1) & 1) {					/* TM */
+        s->alarm = 0;
+        tmp105_interrupt_update(s);
+    }
+
+    switch (s->pointer & 3) {
+    case TMP105_REG_TEMPERATURE:
+        s->buf[s->len ++] = (((uint16_t) s->temperature) >> 8);
+        s->buf[s->len ++] = (((uint16_t) s->temperature) >> 0) &
+                (0xf0 << ((~s->config >> 5) & 3));		/* R */
+        break;
+
+    case TMP105_REG_CONFIG:
+        s->buf[s->len ++] = s->config;
+        break;
+
+    case TMP105_REG_T_LOW:
+        s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 8;
+        s->buf[s->len ++] = ((uint16_t) s->limit[0]) >> 0;
+        break;
+
+    case TMP105_REG_T_HIGH:
+        s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 8;
+        s->buf[s->len ++] = ((uint16_t) s->limit[1]) >> 0;
+        break;
+    }
+}
+
+static void tmp105_write(TMP105State *s)
+{
+    switch (s->pointer & 3) {
+    case TMP105_REG_TEMPERATURE:
+        break;
+
+    case TMP105_REG_CONFIG:
+        if (s->buf[0] & ~s->config & (1 << 0))			/* SD */
+            printf("%s: TMP105 shutdown\n", __func__);
+        s->config = s->buf[0];
+        s->faults = tmp105_faultq[(s->config >> 3) & 3];	/* F */
+        tmp105_alarm_update(s);
+        break;
+
+    case TMP105_REG_T_LOW:
+    case TMP105_REG_T_HIGH:
+        if (s->len >= 3)
+            s->limit[s->pointer & 1] = (int16_t)
+                    ((((uint16_t) s->buf[0]) << 8) | s->buf[1]);
+        tmp105_alarm_update(s);
+        break;
+    }
+}
+
+static uint8_t tmp105_rx(I2CSlave *i2c)
+{
+    TMP105State *s = TMP105(i2c);
+
+    if (s->len < 2) {
+        return s->buf[s->len ++];
+    } else {
+        return 0xff;
+    }
+}
+
+static int tmp105_tx(I2CSlave *i2c, uint8_t data)
+{
+    TMP105State *s = TMP105(i2c);
+
+    if (s->len == 0) {
+        s->pointer = data;
+        s->len++;
+    } else {
+        if (s->len <= 2) {
+            s->buf[s->len - 1] = data;
+        }
+        s->len++;
+        tmp105_write(s);
+    }
+
+    return 0;
+}
+
+static int tmp105_event(I2CSlave *i2c, enum i2c_event event)
+{
+    TMP105State *s = TMP105(i2c);
+
+    if (event == I2C_START_RECV) {
+        tmp105_read(s);
+    }
+
+    s->len = 0;
+    return 0;
+}
+
+static int tmp105_post_load(void *opaque, int version_id)
+{
+    TMP105State *s = opaque;
+
+    s->faults = tmp105_faultq[(s->config >> 3) & 3];		/* F */
+
+    tmp105_interrupt_update(s);
+    return 0;
+}
+
+static bool detect_falling_needed(void *opaque)
+{
+    TMP105State *s = opaque;
+
+    /*
+     * We only need to migrate the detect_falling bool if it's set;
+     * for migration from older machines we assume that it is false
+     * (ie temperature is not out of range).
+     */
+    return s->detect_falling;
+}
+
+static const VMStateDescription vmstate_tmp105_detect_falling = {
+    .name = "TMP105/detect-falling",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = detect_falling_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_BOOL(detect_falling, TMP105State),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static const VMStateDescription vmstate_tmp105 = {
+    .name = "TMP105",
+    .version_id = 0,
+    .minimum_version_id = 0,
+    .post_load = tmp105_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT8(len, TMP105State),
+        VMSTATE_UINT8_ARRAY(buf, TMP105State, 2),
+        VMSTATE_UINT8(pointer, TMP105State),
+        VMSTATE_UINT8(config, TMP105State),
+        VMSTATE_INT16(temperature, TMP105State),
+        VMSTATE_INT16_ARRAY(limit, TMP105State, 2),
+        VMSTATE_UINT8(alarm, TMP105State),
+        VMSTATE_I2C_SLAVE(i2c, TMP105State),
+        VMSTATE_END_OF_LIST()
+    },
+    .subsections = (const VMStateDescription*[]) {
+        &vmstate_tmp105_detect_falling,
+        NULL
+    }
+};
+
+static void tmp105_reset(I2CSlave *i2c)
+{
+    TMP105State *s = TMP105(i2c);
+
+    s->temperature = 0;
+    s->pointer = 0;
+    s->config = 0;
+    s->faults = tmp105_faultq[(s->config >> 3) & 3];
+    s->alarm = 0;
+    s->detect_falling = false;
+
+    s->limit[0] = 0x4b00; /* T_LOW, 75 degrees C */
+    s->limit[1] = 0x5000; /* T_HIGH, 80 degrees C */
+
+    tmp105_interrupt_update(s);
+}
+
+static void tmp105_realize(DeviceState *dev, Error **errp)
+{
+    I2CSlave *i2c = I2C_SLAVE(dev);
+    TMP105State *s = TMP105(i2c);
+
+    qdev_init_gpio_out(&i2c->qdev, &s->pin, 1);
+
+    tmp105_reset(&s->i2c);
+}
+
+static void tmp105_initfn(Object *obj)
+{
+    object_property_add(obj, "temperature", "int",
+                        tmp105_get_temperature,
+                        tmp105_set_temperature, NULL, NULL);
+}
+
+static void tmp105_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
+
+    dc->realize = tmp105_realize;
+    k->event = tmp105_event;
+    k->recv = tmp105_rx;
+    k->send = tmp105_tx;
+    dc->vmsd = &vmstate_tmp105;
+}
+
+static const TypeInfo tmp105_info = {
+    .name          = TYPE_TMP105,
+    .parent        = TYPE_I2C_SLAVE,
+    .instance_size = sizeof(TMP105State),
+    .instance_init = tmp105_initfn,
+    .class_init    = tmp105_class_init,
+};
+
+static void tmp105_register_types(void)
+{
+    type_register_static(&tmp105_info);
+}
+
+type_init(tmp105_register_types)