diff options
Diffstat (limited to 'chip/lm4/jtag.c')
| -rw-r--r-- | chip/lm4/jtag.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/chip/lm4/jtag.c b/chip/lm4/jtag.c index 6b59d7fead..a3867aa0f6 100644 --- a/chip/lm4/jtag.c +++ b/chip/lm4/jtag.c @@ -4,14 +4,15 @@ */ #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_RUN | CGC_MODE_SLEEP); + clock_enable_peripheral(CGC_OFFSET_GPIO, 0x0004, CGC_MODE_ALL); /* * Ensure PC0:3 are set to JTAG function. They should be set this way @@ -35,7 +36,30 @@ void jtag_pre_init(void) 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 */ + |