diff options
author | Corey Minyard <cminyard@mvista.com> | 2021-05-18 16:08:03 -0500 |
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committer | Corey Minyard <cminyard@mvista.com> | 2021-06-17 07:10:32 -0500 |
commit | 5e9ae4b1a31a17a72487372067a78b6afa68b68d (patch) | |
tree | 3411236ff04f4ab9a028910143c1d19bf21cc00f /hw/misc/tmp105.c | |
parent | 58f3e3fe69a66a5c27675faf3e7afa52e027e621 (diff) |
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>
Diffstat (limited to 'hw/misc/tmp105.c')
-rw-r--r-- | hw/misc/tmp105.c | 328 |
1 files changed, 0 insertions, 328 deletions
diff --git a/hw/misc/tmp105.c b/hw/misc/tmp105.c deleted file mode 100644 index d299d9b21b..0000000000 --- a/hw/misc/tmp105.c +++ /dev/null @@ -1,328 +0,0 @@ -/* - * 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 "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) |