mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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bb15561db5
Since pretty much always, we've declared console commands to take a "longhelp" argument with detailed explanations of what the command does. But since almost as long, we've never actually used that argument for anything - we just silently throw it away in the macro. There's only one command (usbchargemode) that even thinks it defines that argument. We're never going to use this, let's just get rid of it. BUG=none BRANCH=none CQ-DEPEND=CL:*279060 CQ-DEPEND=CL:*279158 CQ-DEPEND=CL:*279037 TEST=make buildall; tested on Cr50 hardware Everything builds. Since we never used this arg anyway, there had better not be any difference in the result. Change-Id: Id3f71a53d02e3dc625cfcc12aa71ecb50e35eb9f Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/374163 Reviewed-by: Myles Watson <mylesgw@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
/* Copyright (c) 2012 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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/* PECI interface for Chrome EC */
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#include "chipset.h"
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#include "clock.h"
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#include "common.h"
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "peci.h"
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#include "registers.h"
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#include "temp_sensor.h"
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#include "util.h"
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/* Initial PECI baud rate */
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#define PECI_BAUD_RATE 100000
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/* Polling interval for PECI, in ms */
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#define PECI_POLL_INTERVAL_MS 250
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/*
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* Internal and external path delays, in ns. The external delay is a
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* best-guess measurement, but we're fairly tolerant of a bad guess because
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* PECI_BAUD_RATE is slow compared to PECI's actual maximum baud rate.
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*/
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#define PECI_TD_FET_NS 60
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#define PECI_TD_INT_NS 80
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/* Number of controller retries. Should be between 0 and 7. */
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#define PECI_RETRY_COUNT 4
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/* Timing negotiation error bypass. 1 = on. 0 = off. */
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#define PECI_ERROR_BYPASS 1
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#define TEMP_AVG_LENGTH 4 /* Should be power of 2 */
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static int temp_vals[TEMP_AVG_LENGTH];
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static int temp_idx;
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int peci_get_cpu_temp(void)
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{
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int v = LM4_PECI_M0D0 & 0xffff;
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if (v >= 0x8000 && v <= 0x8fff)
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return -1;
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return v >> 6;
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}
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int peci_temp_sensor_get_val(int idx, int *temp_ptr)
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{
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int sum = 0;
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int success_cnt = 0;
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int i;
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if (!chipset_in_state(CHIPSET_STATE_ON))
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return EC_ERROR_NOT_POWERED;
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for (i = 0; i < TEMP_AVG_LENGTH; ++i) {
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if (temp_vals[i] >= 0) {
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success_cnt++;
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sum += temp_vals[i];
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}
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}
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/*
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* Require at least two valid samples. When the AP transitions into S0,
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* it is possible, depending on the timing of the PECI sample, to read
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* an invalid temperature. This is very rare, but when it does happen
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* the temperature returned is CONFIG_PECI_TJMAX. Requiring two valid
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* samples here assures us that one bad maximum temperature reading
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* when entering S0 won't cause us to trigger an over temperature.
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*/
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if (success_cnt < 2)
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return EC_ERROR_UNKNOWN;
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*temp_ptr = sum / success_cnt;
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return EC_SUCCESS;
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}
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static void peci_temp_sensor_poll(void)
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{
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temp_vals[temp_idx] = peci_get_cpu_temp();
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temp_idx = (temp_idx + 1) & (TEMP_AVG_LENGTH - 1);
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}
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DECLARE_HOOK(HOOK_TICK, peci_temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
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static void peci_freq_changed(void)
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{
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int freq = clock_get_freq();
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int baud;
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/* Disable polling while reconfiguring */
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LM4_PECI_CTL = 0;
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/*
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* Calculate baud setting from desired rate, compensating for internal
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* and external delays.
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*/
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baud = freq / (4 * PECI_BAUD_RATE) - 2;
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baud -= (freq / 1000000) * (PECI_TD_FET_NS + PECI_TD_INT_NS) / 1000;
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/* Set baud rate and polling rate */
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LM4_PECI_DIV = (baud << 16) |
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(PECI_POLL_INTERVAL_MS * (freq / 1000 / 4096));
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/* Set up temperature monitoring to report in degrees K */
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LM4_PECI_CTL = ((CONFIG_PECI_TJMAX + 273) << 22) | 0x0001 |
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(PECI_RETRY_COUNT << 12) |
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(PECI_ERROR_BYPASS << 11);
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}
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DECLARE_HOOK(HOOK_FREQ_CHANGE, peci_freq_changed, HOOK_PRIO_DEFAULT);
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static void peci_init(void)
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{
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int i;
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/* Enable the PECI module in run and sleep modes. */
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clock_enable_peripheral(CGC_OFFSET_PECI, 0x1,
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CGC_MODE_RUN | CGC_MODE_SLEEP);
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/* Configure GPIOs */
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gpio_config_module(MODULE_PECI, 1);
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/* Set initial clock frequency */
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peci_freq_changed();
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/* Initialize temperature reading buffer to a sane value. */
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for (i = 0; i < TEMP_AVG_LENGTH; ++i)
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temp_vals[i] = 300; /* 27 C */
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}
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DECLARE_HOOK(HOOK_INIT, peci_init, HOOK_PRIO_DEFAULT);
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/*****************************************************************************/
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/* Console commands */
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static int command_peci_temp(int argc, char **argv)
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{
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int t = peci_get_cpu_temp();
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if (t == -1) {
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ccprintf("PECI error 0x%04x\n", LM4_PECI_M0D0 & 0xffff);
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return EC_ERROR_UNKNOWN;
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}
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ccprintf("CPU temp = %d K = %d C\n", t, K_TO_C(t));
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return EC_SUCCESS;
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}
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DECLARE_CONSOLE_COMMAND(pecitemp, command_peci_temp,
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NULL,
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"Print CPU temperature");
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