mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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727053a376
Added system reset and reset causes for ITE chip. The only reset causes available on this chip are watchdog reset or power on reset. BRANCH=none BUG=none TEST=Used reboot console command with various args and verified reset cause was recorded correctly on next boot. Change-Id: Ie65f1e8f2b98c1e614b5c1d8bcbe9b3000ed9590 Signed-off-by: Alec Berg <alecaberg@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/179539 Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/* Copyright (c) 2013 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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/* System module for Chrome EC : hardware specific implementation */
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#include "console.h"
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#include "cpu.h"
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#include "flash.h"
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#include "registers.h"
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#include "system.h"
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#include "task.h"
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#include "util.h"
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#include "version.h"
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#include "watchdog.h"
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/* Battery backed RAM indices. */
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enum system_bram_indices {
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BRAM_INDEX_SAVED_RESET_FLAGS = 0, /* uses 4 bytes */
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};
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void system_hibernate(uint32_t seconds, uint32_t microseconds)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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}
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static void check_reset_cause(void)
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{
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uint32_t flags = 0;
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uint8_t raw_reset_cause = IT83XX_GCTRL_RSTS & 0x03;
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/* Clear reset cause. */
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IT83XX_GCTRL_RSTS |= 0x01;
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/* Determine if watchdog reset or power on reset. */
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if (raw_reset_cause & 0x02)
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flags |= RESET_FLAG_WATCHDOG;
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else
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flags |= RESET_FLAG_POWER_ON;
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/* Restore then clear saved reset flags. */
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flags |= REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS) << 24;
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flags |= REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+1) << 16;
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flags |= REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+2) << 8;
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flags |= REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+3);
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS) = 0;
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+1) = 0;
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+2) = 0;
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+3) = 0;
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system_set_reset_flags(flags);
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}
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void system_pre_init(void)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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check_reset_cause();
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}
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void system_reset(int flags)
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{
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uint32_t save_flags = 0;
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/* Disable interrupts to avoid task swaps during reboot. */
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interrupt_disable();
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/* Save current reset reasons if necessary */
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if (flags & SYSTEM_RESET_PRESERVE_FLAGS)
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save_flags = system_get_reset_flags() | RESET_FLAG_PRESERVED;
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/* Add in AP off flag into saved flags. */
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if (flags & SYSTEM_RESET_LEAVE_AP_OFF)
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save_flags |= RESET_FLAG_AP_OFF;
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/* Store flags to battery backed RAM. */
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS) = save_flags >> 24;
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+1) =
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(save_flags >> 16) & 0xff;
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+2) =
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(save_flags >> 8) & 0xff;
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REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+3) =
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save_flags & 0xff;
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/*
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* Writing invalid key to watchdog module triggers a soft reset. For
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* now this is the only option, no hard reset.
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*/
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IT83XX_ETWD_ETWCFG |= 0x20;
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IT83XX_ETWD_EWDKEYR = 0x00;
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/* Spin and wait for reboot; should never return */
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while (1)
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;
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}
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int system_set_scratchpad(uint32_t value)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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return 0;
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}
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uint32_t system_get_scratchpad(void)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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return 0;
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}
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const char *system_get_chip_vendor(void)
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{
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return "ite";
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}
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const char *system_get_chip_name(void)
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{
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return "it83xx";
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}
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const char *system_get_chip_revision(void)
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{
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return "";
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}
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int system_get_vbnvcontext(uint8_t *block)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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return EC_SUCCESS;
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}
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int system_set_vbnvcontext(const uint8_t *block)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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return EC_SUCCESS;
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}
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int system_set_console_force_enabled(int val)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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return 0;
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}
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int system_get_console_force_enabled(void)
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{
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/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
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return 0;
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}
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