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/* Copyright 2016 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 "console.h"
#include "hooks.h"
#include "rdd.h"
#include "registers.h"
#include "task.h"
#include "usb_api.h"
static uint16_t debug_detect;
int debug_cable_is_attached(void)
{
uint8_t cc1 = GREAD_FIELD(RDD, INPUT_PIN_VALUES, CC1);
uint8_t cc2 = GREAD_FIELD(RDD, INPUT_PIN_VALUES, CC2);
return (cc1 == cc2 && (cc1 == 3 || cc1 == 1));
}
void rdd_interrupt(void)
{
if (debug_cable_is_attached()) {
ccprintf("Debug Accessory connected\n");
/* Detect when debug cable is disconnected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, ~debug_detect);
rdd_attached();
} else {
ccprintf("Debug Accessory disconnected\n");
/* Detect when debug cable is connected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, debug_detect);
rdd_detached();
}
/* Clear interrupt */
GWRITE_FIELD(RDD, INT_STATE, INTR_DEBUG_STATE_DETECTED, 1);
}
DECLARE_IRQ(GC_IRQNUM_RDD0_INTR_DEBUG_STATE_DETECTED_INT, rdd_interrupt, 1);
void rdd_init(void)
{
/* Enable RDD */
clock_enable_module(MODULE_RDD, 1);
GWRITE(RDD, POWER_DOWN_B, 1);
debug_detect = GREAD(RDD, PROG_DEBUG_STATE_MAP);
/*
* Unitl the system is robust enough always start with the phy facing
* the USB-C connector.
*/
rdd_attached();
/* Make sure the interrupt fires next time debug cable is connected. */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, debug_detect);
/* Enable RDD interrupts */
task_enable_irq(GC_IRQNUM_RDD0_INTR_DEBUG_STATE_DETECTED_INT);
GWRITE_FIELD(RDD, INT_ENABLE, INTR_DEBUG_STATE_DETECTED, 1);
}
DECLARE_HOOK(HOOK_INIT, rdd_init, HOOK_PRIO_DEFAULT);
static int command_test_rdd(int argc, char **argv)
{
GWRITE_FIELD(RDD, INT_TEST, INTR_DEBUG_STATE_DETECTED, 1);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(test_rdd, command_test_rdd, "", "", NULL);
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