1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/* 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 "system.h"
#include "task.h"
#include "usb_api.h"
#define CPRINTS(format, args...) cprints(CC_USB, format, ## args)
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()) {
CPRINTS("Debug Accessory connected");
disable_sleep(SLEEP_MASK_RDD);
/* Detect when debug cable is disconnected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, ~debug_detect);
rdd_attached();
} else {
CPRINTS("Debug Accessory disconnected");
/* Detect when debug cable is connected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, debug_detect);
rdd_detached();
enable_sleep(SLEEP_MASK_RDD);
}
/* 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);
/* Initialize the detached debug state */
rdd_detached();
/* 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);
|
