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https://github.com/Telecominfraproject/OpenCellular.git
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24acac67a3
We see some intermittent failure on PECI read. This CL lower PECI baud rate from 150K to 100K. Also, we poll PECI temperature 4 times per second and average over last 4 values. We only report read error when last 4 read all fails. This CL also increases the external path delay, increases retry count, and also enable timing negotiation error bypass. BUG=chrome-os-partner:10382 TEST=Still able to read from all temperature sensors Change-Id: I38cefeabd9e3eff4bb8e4df4138c4ffd49cd84a2 Reviewed-on: https://gerrit.chromium.org/gerrit/26554 Reviewed-by: Randall Spangler <rspangler@chromium.org> Tested-by: Vic Yang <victoryang@chromium.org> Commit-Ready: Vic Yang <victoryang@chromium.org>
136 lines
2.5 KiB
C
136 lines
2.5 KiB
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Temperature sensor module for Chrome EC */
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#include "board.h"
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#include "chip_temp_sensor.h"
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#include "chipset.h"
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#include "console.h"
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#include "gpio.h"
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#include "i2c.h"
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#include "lpc.h"
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#include "ec_commands.h"
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#include "peci.h"
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#include "task.h"
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#include "temp_sensor.h"
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#include "thermal.h"
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#include "timer.h"
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#include "tmp006.h"
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#include "util.h"
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/* Defined in board_temp_sensor.c. Must be in the same order as
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* in enum temp_sensor_id.
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*/
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extern const struct temp_sensor_t temp_sensors[TEMP_SENSOR_COUNT];
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int temp_sensor_read(enum temp_sensor_id id)
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{
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const struct temp_sensor_t *sensor;
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if (id < 0 || id >= TEMP_SENSOR_COUNT)
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return -1;
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sensor = temp_sensors + id;
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return sensor->read(sensor->idx);
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}
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int temp_sensor_powered(enum temp_sensor_id id)
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{
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int flag = temp_sensors[id].power_flags;
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if (flag & TEMP_SENSOR_POWER_VS &&
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gpio_get_level(GPIO_PGOOD_1_8VS) == 0)
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return 0;
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if (flag & TEMP_SENSOR_POWER_CPU &&
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!chipset_in_state(CHIPSET_STATE_ON))
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return 0;
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return 1;
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}
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void poll_slow_sensors(void)
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{
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/* Poll every second */
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#ifdef CONFIG_TMP006
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tmp006_poll();
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#endif
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#ifdef CHIP_lm4
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chip_temp_sensor_poll();
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#endif
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}
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static void poll_fast_sensors(void)
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{
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/* Poll every 1/4 second */
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#ifdef CONFIG_PECI
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peci_temp_sensor_poll();
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#endif
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}
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static void update_lpc_mapped_memory(void)
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{
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int i, t;
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uint8_t *mapped = lpc_get_memmap_range() + EC_MEMMAP_TEMP_SENSOR;
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memset(mapped, 0xff, 16);
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for (i = 0; i < TEMP_SENSOR_COUNT && i < 16; ++i) {
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if (!temp_sensor_powered(i)) {
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mapped[i] = 0xfd;
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continue;
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}
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t = temp_sensor_read(i);
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if (t != -1)
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mapped[i] = t - EC_TEMP_SENSOR_OFFSET;
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else
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mapped[i] = 0xfe;
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}
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}
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void temp_sensor_task(void)
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{
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int i;
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while (1) {
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for (i = 0; i < 4; ++i) {
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usleep(250000);
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poll_fast_sensors();
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}
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poll_slow_sensors();
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update_lpc_mapped_memory();
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}
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}
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/*****************************************************************************/
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/* Console commands */
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static int command_temps(int argc, char **argv)
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{
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int i;
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int rv = EC_SUCCESS;
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int t;
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for (i = 0; i < TEMP_SENSOR_COUNT; ++i) {
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ccprintf(" %-20s: ", temp_sensors[i].name);
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t = temp_sensor_read(i);
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if (t < 0) {
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ccprintf("Error\n");
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rv = EC_ERROR_UNKNOWN;
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} else
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ccprintf("%d K = %d C\n", t, t - 273);
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}
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return rv;
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}
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DECLARE_CONSOLE_COMMAND(temps, command_temps,
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NULL,
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"Print temp sensors",
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NULL);
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