diff options
Diffstat (limited to 'chip/lm4/jtag.c')
| -rw-r--r-- | chip/lm4/jtag.c | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/chip/lm4/jtag.c b/chip/lm4/jtag.c deleted file mode 100644 index a3867aa0f6..0000000000 --- a/chip/lm4/jtag.c +++ /dev/null @@ -1,65 +0,0 @@ -/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include "clock.h" -#include "gpio.h" -#include "jtag.h" -#include "registers.h" -#include "system.h" - -void jtag_pre_init(void) -{ - /* Enable clocks to GPIO block C in run and sleep modes. */ - clock_enable_peripheral(CGC_OFFSET_GPIO, 0x0004, CGC_MODE_ALL); - - /* - * Ensure PC0:3 are set to JTAG function. They should be set this way - * on a cold boot, but on a warm reboot a previous misbehaving image - * could have set them differently. - */ - if (((LM4_GPIO_PCTL(LM4_GPIO_C) & 0x0000ffff) == 0x00001111) && - ((LM4_GPIO_AFSEL(LM4_GPIO_C) & 0x0f) == 0x0f) && - ((LM4_GPIO_DEN(LM4_GPIO_C) & 0x0f) == 0x0f) && - ((LM4_GPIO_PUR(LM4_GPIO_C) & 0x0f) == 0x0f)) - return; /* Already properly configured */ - - /* Unlock commit register for JTAG pins */ - LM4_GPIO_LOCK(LM4_GPIO_C) = LM4_GPIO_LOCK_UNLOCK; - LM4_GPIO_CR(LM4_GPIO_C) |= 0x0f; - - /* Reset JTAG pins */ - LM4_GPIO_PCTL(LM4_GPIO_C) = - (LM4_GPIO_PCTL(LM4_GPIO_C) & 0xffff0000) | 0x00001111; - LM4_GPIO_AFSEL(LM4_GPIO_C) |= 0x0f; - LM4_GPIO_DEN(LM4_GPIO_C) |= 0x0f; - LM4_GPIO_PUR(LM4_GPIO_C) |= 0x0f; - - /* Set interrupt on either edge of the JTAG signals */ - LM4_GPIO_IS(LM4_GPIO_C) &= ~0x0f; - LM4_GPIO_IBE(LM4_GPIO_C) |= 0x0f; - - /* Re-lock commit register */ - LM4_GPIO_CR(LM4_GPIO_C) &= ~0x0f; - LM4_GPIO_LOCK(LM4_GPIO_C) = 0; -} - -#ifdef CONFIG_LOW_POWER_IDLE -void jtag_interrupt(enum gpio_signal signal) -{ - /* - * This interrupt is the first sign someone is trying to use - * the JTAG. Disable slow speed sleep so that the JTAG action - * can take place. - */ - disable_sleep(SLEEP_MASK_JTAG); - - /* - * Once we get this interrupt, disable it from occurring again - * to avoid repeated interrupts when debugging via JTAG. - */ - gpio_disable_interrupt(GPIO_JTAG_TCK); -} -#endif /* CONFIG_LOW_POWER_IDLE */ - |