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f7f3f249ee
When releasing the PINMUX hold, some of the output levels may change. Therefore, it's probably best to let those outputs stabilize before letting the EC out of reset and sample them. BUG=b:36659750 BRANCH=master,cr50 TEST=Flash Cr50. Verify that WP_L is stable before EC is released from reset. Change-Id: Ie2967c5e97f28240e1724b4531655c5dd08a3f29 Signed-off-by: Aseda Aboagye <aaboagye@google.com> Reviewed-on: https://chromium-review.googlesource.com/464257 Commit-Ready: Aseda Aboagye <aaboagye@chromium.org> Tested-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Mary Ruthven <mruthven@chromium.org>
116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/* Copyright 2016 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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#include "clock.h"
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#include "hooks.h"
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#include "registers.h"
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#include "timer.h"
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#define POWER_BUTTON 2
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static uint8_t val;
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int rbox_powerbtn_is_pressed(void)
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{
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return !GREAD_FIELD(RBOX, CHECK_OUTPUT, PWRB_OUT);
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}
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int rbox_powerbtn_override_is_enabled(void)
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{
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return GREAD_FIELD(RBOX, OVERRIDE_OUTPUT, EN) & (1 << POWER_BUTTON);
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}
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void rbox_powerbtn_release(void)
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{
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GWRITE_FIELD(RBOX, OVERRIDE_OUTPUT, EN, 0);
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GWRITE_FIELD(RBOX, OVERRIDE_OUTPUT, OEN, 0);
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GWRITE_FIELD(RBOX, OVERRIDE_OUTPUT, VAL, val);
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}
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void rbox_powerbtn_press(void)
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{
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if (rbox_powerbtn_override_is_enabled())
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return;
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val = GREAD_FIELD(RBOX, OVERRIDE_OUTPUT, VAL);
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GWRITE_FIELD(RBOX, OVERRIDE_OUTPUT, VAL, ~(1 << POWER_BUTTON) & val);
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GWRITE_FIELD(RBOX, OVERRIDE_OUTPUT, OEN, 1 << POWER_BUTTON);
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GWRITE_FIELD(RBOX, OVERRIDE_OUTPUT, EN, 1 << POWER_BUTTON);
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}
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static void rbox_release_ec_reset(void)
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{
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/* Unfreeze the PINMUX */
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GREG32(PINMUX, HOLD) = 0;
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/* Allow some time for outputs to stabilize. */
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usleep(500);
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/* Let the EC go (the RO bootloader asserts it ASAP after POR) */
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GREG32(RBOX, ASSERT_EC_RST) = 0;
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}
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DECLARE_HOOK(HOOK_INIT, rbox_release_ec_reset, HOOK_PRIO_LAST);
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static void rbox_init(void)
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{
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/* Enable RBOX */
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clock_enable_module(MODULE_RBOX, 1);
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/* Clear any interrupt bits (write 1's to clear) */
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GREG32(RBOX, INT_STATE) = 0xffffffff;
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/* Clear any wakeup bits (write 0x2, then 0x0) */
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GREG32(RBOX, WAKEUP) = GC_RBOX_WAKEUP_CLEAR_MASK;
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GREG32(RBOX, WAKEUP) = 0;
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/* Override rbox fuses and setup correct behavior */
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GWRITE(RBOX, DEBUG_CLK10HZ_COUNT, 0x63ff);
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GWRITE(RBOX, DEBUG_SHORT_DELAY_COUNT, 0x4ff);
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GWRITE(RBOX, DEBUG_LONG_DELAY_COUNT, 0x31);
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GWRITE(RBOX, DEBUG_DEBOUNCE, 0x4);
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GWRITE(RBOX, DEBUG_KEY_COMBO0, 0xC0);
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GWRITE(RBOX, DEBUG_KEY_COMBO1, 0x0);
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GWRITE(RBOX, DEBUG_KEY_COMBO2, 0x0);
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/* DEBUG_BLOCK_OUTPUT value should be 0x7 */
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GWRITE(RBOX, DEBUG_BLOCK_OUTPUT,
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GC_RBOX_DEBUG_BLOCK_OUTPUT_KEY0_SEL_MASK |
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GC_RBOX_DEBUG_BLOCK_OUTPUT_KEY1_SEL_MASK |
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GC_RBOX_DEBUG_BLOCK_OUTPUT_KEY0_VAL_MASK);
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/* DEBUG_POL value should be 0x21 */
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GWRITE(RBOX, DEBUG_POL,
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0x1 << GC_RBOX_DEBUG_POL_AC_PRESENT_LSB |
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0x0 << GC_RBOX_DEBUG_POL_PWRB_IN_LSB |
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0x0 << GC_RBOX_DEBUG_POL_PWRB_OUT_LSB |
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0x0 << GC_RBOX_DEBUG_POL_KEY0_IN_LSB |
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0x0 << GC_RBOX_DEBUG_POL_KEY0_OUT_LSB |
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0x1 << GC_RBOX_DEBUG_POL_KEY1_IN_LSB |
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0x0 << GC_RBOX_DEBUG_POL_KEY1_OUT_LSB |
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0x0 << GC_RBOX_DEBUG_POL_EC_RST_LSB |
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0x0 << GC_RBOX_DEBUG_POL_BATT_DISABLE_LSB);
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/* DEBUG_TERM value should be 0x1204 */
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GWRITE(RBOX, DEBUG_TERM,
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0x0 << GC_RBOX_DEBUG_TERM_AC_PRESENT_LSB |
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0x1 << GC_RBOX_DEBUG_TERM_ENTERING_RW_LSB |
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0x0 << GC_RBOX_DEBUG_TERM_PWRB_IN_LSB |
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0x0 << GC_RBOX_DEBUG_TERM_PWRB_OUT_LSB |
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0x2 << GC_RBOX_DEBUG_TERM_KEY0_IN_LSB |
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0x0 << GC_RBOX_DEBUG_TERM_KEY0_OUT_LSB |
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0x1 << GC_RBOX_DEBUG_TERM_KEY1_IN_LSB |
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0x0 << GC_RBOX_DEBUG_TERM_KEY1_OUT_LSB);
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/* DEBUG_BLOCK_OUTPUT value should be 0x157 */
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GWRITE(RBOX, DEBUG_DRIVE,
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0x3 << GC_RBOX_DEBUG_DRIVE_PWRB_OUT_LSB |
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0x1 << GC_RBOX_DEBUG_DRIVE_KEY0_OUT_LSB |
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0x1 << GC_RBOX_DEBUG_DRIVE_KEY1_OUT_LSB |
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0x1 << GC_RBOX_DEBUG_DRIVE_EC_RST_LSB |
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0x1 << GC_RBOX_DEBUG_DRIVE_BATT_DISABLE_LSB);
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/* FUSE_CTRL value should be 0x3 */
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GWRITE(RBOX, FUSE_CTRL,
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GC_RBOX_FUSE_CTRL_OVERRIDE_FUSE_MASK |
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GC_RBOX_FUSE_CTRL_OVERRIDE_FUSE_READY_MASK);
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}
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DECLARE_HOOK(HOOK_INIT, rbox_init, HOOK_PRIO_DEFAULT - 1);
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