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9e070fd92b
Enable JTAG functionality by SW without pulling down strap-pin nJEN0 or nJEN1 during ec POWERON or VCCRST reset occurs. Please notice it will change pinmux to JTAG directly. Modified drivers: 1. gpio.c: Remove JTAG0/1 alternative groups and bits from gpio_alt_table 2. jtag.c: Enable JTAG functionality BUG=chrome-os-partner:34346 TEST=make buildall -j; test nuvoton IC specific drivers Signed-off-by: Mulin Chao <mlchao@nuvoton.com> Change-Id: I5a664adedeea1c75df37662dc1f3206e90163eeb Reviewed-on: https://chromium-review.googlesource.com/306470 Reviewed-by: Shawn N <shawnn@chromium.org>
32 lines
841 B
C
32 lines
841 B
C
/* Copyright (c) 2014 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 "gpio.h"
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#include "jtag.h"
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#include "registers.h"
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#include "system.h"
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void jtag_pre_init(void)
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{
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/* Setting for fixing JTAG issue */
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NPCX_DBGCTRL = 0x04;
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/* Enable automatic freeze mode */
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CLEAR_BIT(NPCX_DBGFRZEN3, NPCX_DBGFRZEN3_GLBL_FRZ_DIS);
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/*
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* Enable JTAG functionality by SW without pulling down strap-pin
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* nJEN0 or nJEN1 during ec POWERON or VCCRST reset occurs.
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* Please notice it will change pinmux to JTAG directly.
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*/
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#ifdef NPCX_ENABLE_JTAG
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#if NPCX_JTAG_MODULE2
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CLEAR_BIT(NPCX_DEVALT(ALT_GROUP_5), NPCX_DEVALT5_NJEN1_EN);
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#else
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CLEAR_BIT(NPCX_DEVALT(ALT_GROUP_5), NPCX_DEVALT5_NJEN0_EN);
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#endif
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#endif
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}
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