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authorChromeOS Developer <dparker@chromium.org>2013-11-09 16:48:44 -0800
committerchrome-internal-fetch <chrome-internal-fetch@google.com>2013-12-07 00:57:24 +0000
commitd53fe7b79b18441ee88058c09010be44c7b43761 (patch)
treeb2f4faf1613a924fb38fa048264f96812eeb73d0 /driver
parentf9e00364ef84180e89e9c4bfb79e0123ee54923d (diff)
downloadchrome-ec-d53fe7b79b18441ee88058c09010be44c7b43761.tar.gz
Basic driver for tmp432 temperature sensor
This allows local and remote temp values to be added to a board's list of temp sensors. It also adds a 'tmp432' EC console command to query temps and set alert thresholds. Fractional degrees are not supported. DPTF support is not addressed. BUG=chrome-os-partner:23985 BRANCH=none TEST=Add tmp432 support to a board with the sensor then run the 'tmp432' and 'temps' EC console commands. Signed-off-by: Dave Parker <dparker@chromium.org> Change-Id: Ifee47cf4d4cf5eedef9ef2bfa2149f183f1d7a7b Reviewed-on: https://chromium-review.googlesource.com/178688 Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Dave Parker <dparker@chromium.org> Tested-by: Dave Parker <dparker@chromium.org>
Diffstat (limited to 'driver')
-rw-r--r--driver/build.mk1
-rw-r--r--driver/temp_sensor/tmp432.c217
-rw-r--r--driver/temp_sensor/tmp432.h96
3 files changed, 314 insertions, 0 deletions
diff --git a/driver/build.mk b/driver/build.mk
index 59e27f1efa..f981b6942c 100644
--- a/driver/build.mk
+++ b/driver/build.mk
@@ -32,6 +32,7 @@ driver-$(CONFIG_REGULATOR_IR357X)+=regulator_ir357x.o
# Temperature sensors
driver-$(CONFIG_TEMP_SENSOR_G781)+=temp_sensor/g781.o
driver-$(CONFIG_TEMP_SENSOR_TMP006)+=temp_sensor/tmp006.o
+driver-$(CONFIG_TEMP_SENSOR_TMP432)+=temp_sensor/tmp432.o
# USB switches
driver-$(CONFIG_USB_SWITCH_TSU6721)+=usb_switch_tsu6721.o
diff --git a/driver/temp_sensor/tmp432.c b/driver/temp_sensor/tmp432.c
new file mode 100644
index 0000000000..b0f1c056f2
--- /dev/null
+++ b/driver/temp_sensor/tmp432.c
@@ -0,0 +1,217 @@
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* TMP432 temperature sensor module for Chrome EC */
+
+#include "common.h"
+#include "console.h"
+#include "tmp432.h"
+#include "gpio.h"
+#include "i2c.h"
+#include "hooks.h"
+#include "util.h"
+
+static int temp_val_local;
+static int temp_val_remote1;
+static int temp_val_remote2;
+
+/**
+ * Determine whether the sensor is powered.
+ *
+ * @return non-zero the tmp432 sensor is powered.
+ */
+static int has_power(void)
+{
+#ifdef CONFIG_TEMP_SENSOR_POWER_GPIO
+ return gpio_get_level(CONFIG_TEMP_SENSOR_POWER_GPIO);
+#else
+ return 1;
+#endif
+}
+
+static int raw_read8(const int offset, int *data_ptr)
+{
+ return i2c_read8(I2C_PORT_THERMAL, TMP432_I2C_ADDR, offset, data_ptr);
+}
+
+static int raw_write8(const int offset, int data)
+{
+ return i2c_write8(I2C_PORT_THERMAL, TMP432_I2C_ADDR, offset, data);
+}
+
+static int get_temp(const int offset, int *temp_ptr)
+{
+ int rv;
+ int temp_raw = 0;
+
+ rv = raw_read8(offset, &temp_raw);
+ if (rv < 0)
+ return rv;
+
+ *temp_ptr = (int)(int8_t)temp_raw;
+ return EC_SUCCESS;
+}
+
+static int tmp432_set_temp(const int offset, int temp)
+{
+ if (temp < -127 || temp > 127)
+ return EC_ERROR_INVAL;
+
+ return raw_write8(offset, (uint8_t)temp);
+}
+
+int tmp432_get_val(int idx, int *temp_ptr)
+{
+ if (!has_power())
+ return EC_ERROR_NOT_POWERED;
+
+ switch (idx) {
+ case TMP432_IDX_LOCAL:
+ *temp_ptr = temp_val_local;
+ break;
+ case TMP432_IDX_REMOTE1:
+ *temp_ptr = temp_val_remote1;
+ break;
+ case TMP432_IDX_REMOTE2:
+ *temp_ptr = temp_val_remote2;
+ break;
+ default:
+ return EC_ERROR_UNKNOWN;
+ }
+
+ return EC_SUCCESS;
+}
+
+static void temp_sensor_poll(void)
+{
+ int temp_c;
+
+ if (!has_power())
+ return;
+
+ if (get_temp(TMP432_LOCAL, &temp_c) == EC_SUCCESS)
+ temp_val_local = C_TO_K(temp_c);
+
+ if (get_temp(TMP432_REMOTE1, &temp_c) == EC_SUCCESS)
+ temp_val_remote1 = C_TO_K(temp_c);
+
+ if (get_temp(TMP432_REMOTE2, &temp_c) == EC_SUCCESS)
+ temp_val_remote2 = C_TO_K(temp_c);
+}
+DECLARE_HOOK(HOOK_SECOND, temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
+
+static void print_temps(
+ const char *name,
+ const int tmp432_temp_reg,
+ const int tmp432_therm_limit_reg,
+ const int tmp432_high_limit_reg,
+ const int tmp432_low_limit_reg)
+{
+ int value;
+
+ ccprintf("%s:\n", name);
+
+ if (get_temp(tmp432_temp_reg, &value) == EC_SUCCESS)
+ ccprintf(" Temp %3dC\n", value);
+
+ if (get_temp(tmp432_therm_limit_reg, &value) == EC_SUCCESS)
+ ccprintf(" Therm Trip %3dC\n", value);
+
+ if (get_temp(tmp432_high_limit_reg, &value) == EC_SUCCESS)
+ ccprintf(" High Alarm %3dC\n", value);
+
+ if (get_temp(tmp432_low_limit_reg, &value) == EC_SUCCESS)
+ ccprintf(" Low Alarm %3dC\n", value);
+}
+
+static int print_status(void)
+{
+ int value;
+
+ print_temps("Local", TMP432_LOCAL,
+ TMP432_LOCAL_THERM_LIMIT,
+ TMP432_LOCAL_HIGH_LIMIT_R,
+ TMP432_LOCAL_LOW_LIMIT_R);
+
+ print_temps("Remote1", TMP432_REMOTE1,
+ TMP432_REMOTE1_THERM_LIMIT,
+ TMP432_REMOTE1_HIGH_LIMIT_R,
+ TMP432_REMOTE1_LOW_LIMIT_R);
+
+ print_temps("Remote2", TMP432_REMOTE2,
+ TMP432_REMOTE2_THERM_LIMIT,
+ TMP432_REMOTE2_HIGH_LIMIT_R,
+ TMP432_REMOTE2_LOW_LIMIT_R);
+
+ ccprintf("\n");
+
+ if (raw_read8(TMP432_STATUS, &value) == EC_SUCCESS)
+ ccprintf("STATUS: %08b\n", value);
+
+ if (raw_read8(TMP432_CONFIGURATION1_R, &value) == EC_SUCCESS)
+ ccprintf("CONFIG1: %08b\n", value);
+
+ if (raw_read8(TMP432_CONFIGURATION2_R, &value) == EC_SUCCESS)
+ ccprintf("CONFIG2: %08b\n", value);
+
+ return EC_SUCCESS;
+}
+
+static int command_tmp432(int argc, char **argv)
+{
+ char *command;
+ char *e;
+ int data;
+ int offset;
+ int rv;
+
+ if (!has_power()) {
+ ccprintf("ERROR: Temp sensor not powered.\n");
+ return EC_ERROR_NOT_POWERED;
+ }
+
+ /* If no args just print status */
+ if (argc == 1)
+ return print_status();
+
+ if (argc < 3)
+ return EC_ERROR_PARAM_COUNT;
+
+ command = argv[1];
+ offset = strtoi(argv[2], &e, 0);
+ if (*e || offset < 0 || offset > 255)
+ return EC_ERROR_PARAM2;
+
+ if (!strcasecmp(command, "getbyte")) {
+ rv = raw_read8(offset, &data);
+ if (rv < 0)
+ return rv;
+ ccprintf("Byte at offset 0x%02x is %08b\n", offset, data);
+ return rv;
+ }
+
+ /* Remaining commands are "tmp432 set-command offset data" */
+ if (argc != 4)
+ return EC_ERROR_PARAM_COUNT;
+
+ data = strtoi(argv[3], &e, 0);
+ if (*e)
+ return EC_ERROR_PARAM3;
+
+ if (!strcasecmp(command, "settemp")) {
+ ccprintf("Setting 0x%02x to %dC\n", offset, data);
+ rv = tmp432_set_temp(offset, data);
+ } else if (!strcasecmp(command, "setbyte")) {
+ ccprintf("Setting 0x%02x to 0x%02x\n", offset, data);
+ rv = raw_write8(offset, data);
+ } else
+ return EC_ERROR_PARAM1;
+
+ return rv;
+}
+DECLARE_CONSOLE_COMMAND(tmp432, command_tmp432,
+ "[settemp|setbyte <offset> <value>] or [getbyte <offset>]. "
+ "Temps in Celsius.",
+ "Print tmp432 temp sensor status or set parameters.", NULL);
diff --git a/driver/temp_sensor/tmp432.h b/driver/temp_sensor/tmp432.h
new file mode 100644
index 0000000000..acfaf39503
--- /dev/null
+++ b/driver/temp_sensor/tmp432.h
@@ -0,0 +1,96 @@
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* TMP432 temperature sensor module for Chrome EC */
+
+#ifndef __CROS_EC_TEMP_SENSOR_TMP432_H
+#define __CROS_EC_TEMP_SENSOR_TMP432_H
+
+#define TMP432_I2C_ADDR 0x98 /* 7-bit address is 0x4C */
+
+#define TMP432_IDX_LOCAL 0
+#define TMP432_IDX_REMOTE1 1
+#define TMP432_IDX_REMOTE2 2
+
+/* Chip-specific registers */
+#define TMP432_LOCAL 0x00
+#define TMP432_REMOTE1 0x01
+#define TMP432_STATUS 0x02
+#define TMP432_CONFIGURATION1_R 0x03
+#define TMP432_CONVERSION_RATE_R 0x04
+#define TMP432_LOCAL_HIGH_LIMIT_R 0x05
+#define TMP432_LOCAL_LOW_LIMIT_R 0x06
+#define TMP432_REMOTE1_HIGH_LIMIT_R 0x07
+#define TMP432_REMOTE1_LOW_LIMIT_R 0x08
+#define TMP432_CONFIGURATION1_W 0x09
+#define TMP432_CONVERSION_RATE_W 0x0a
+#define TMP432_LOCAL_HIGH_LIMIT_W 0x0b
+#define TMP432_LOCAL_LOW_LIMIT_W 0x0c
+#define TMP432_REMOTE1_HIGH_LIMIT_W 0x0d
+#define TMP432_REMOTE1_LOW_LIMIT_W 0x0e
+#define TMP432_ONESHOT 0x0f
+#define TMP432_REMOTE1_EXTD 0x10
+#define TMP432_REMOTE1_HIGH_LIMIT_EXTD 0x13
+#define TMP432_REMOTE1_LOW_LIMIT_EXTD 0x14
+#define TMP432_REMOTE2_HIGH_LIMIT_R 0x15
+#define TMP432_REMOTE2_HIGH_LIMIT_W 0x15
+#define TMP432_REMOTE2_LOW_LIMIT_R 0x16
+#define TMP432_REMOTE2_LOW_LIMIT_W 0x16
+#define TMP432_REMOTE2_HIGH_LIMIT_EXTD 0x17
+#define TMP432_REMOTE2_LOW_LIMIT_EXTD 0x18
+#define TMP432_REMOTE1_THERM_LIMIT 0x19
+#define TMP432_REMOTE2_THERM_LIMIT 0x1a
+#define TMP432_STATUS_FAULT 0x1b
+#define TMP432_CHANNEL_MASK 0x1f
+#define TMP432_LOCAL_THERM_LIMIT 0x20
+#define TMP432_THERM_HYSTERESIS 0x21
+#define TMP432_CONSECUTIVE_ALERT 0x22
+#define TMP432_REMOTE2 0x23
+#define TMP432_REMOTE2_EXTD 0x24
+#define TMP432_BETA_RANGE_CH1 0x25
+#define TMP432_BETA_RANGE_CH2 0x26
+#define TMP432_NFACTOR_REMOTE1 0x27
+#define TMP432_NFACTOR_REMOTE2 0x28
+#define TMP432_LOCAL_EXTD 0x29
+#define TMP432_STATUS_LIMIT_HIGH 0x35
+#define TMP432_STATUS_LIMIT_LOW 0x36
+#define TMP432_STATUS_THERM 0x37
+#define TMP432_LOCAL_HIGH_LIMIT_EXTD 0x3d
+#define TMP432_LOCAL_LOW_LIMIT_EXTD 0x3e
+#define TMP432_CONFIGURATION2_R 0x3f
+#define TMP432_CONFIGURATION2_W 0x3f
+#define TMP432_RESET_W 0xfc
+#define TMP432_DEVICE_ID 0xfd
+#define TMP432_MANUFACTURER_ID 0xfe
+
+/* Config register bits */
+#define TMP432_CONFIG1_TEMP_RANGE (1 << 2)
+#define TMP432_CONFIG1_MODE (1 << 5)
+#define TMP432_CONFIG1_RUN_L (1 << 6)
+#define TMP432_CONFIG1_ALERT_MASK_L (1 << 7)
+#define TMP432_CONFIG2_RESISTANCE_CORRECTION (1 << 2)
+#define TMP432_CONFIG2_LOCAL_ENABLE (1 << 3)
+#define TMP432_CONFIG2_REMOTE1_ENABLE (1 << 4)
+#define TMP432_CONFIG2_REMOTE2_ENABLE (1 << 5)
+
+/* Status register bits */
+#define TMP432_STATUS_TEMP_THERM_ALARM (1 << 1)
+#define TMP432_STATUS_OPEN (1 << 2)
+#define TMP432_STATUS_TEMP_LOW_ALARM (1 << 3)
+#define TMP432_STATUS_TEMP_HIGH_ALARM (1 << 4)
+#define TMP432_STATUS_BUSY (1 << 7)
+
+/**
+ * Get the last polled value of a sensor.
+ *
+ * @param idx Index to read. Idx indicates whether to read die
+ * temperature or external temperature.
+ * @param temp_ptr Destination for temperature in K.
+ *
+ * @return EC_SUCCESS if successful, non-zero if error.
+ */
+int tmp432_get_val(int idx, int *temp_ptr);
+
+#endif /* __CROS_EC_TEMP_SENSOR_TMP432_H */