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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/* 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)
/*
* The default PROG_DEBUG_STATE_MAP value. Used to tell the to controller send
* an interrupt when CC1/2 are detected to be in the defined voltage range of a
* debug accessory.
*/
#define DETECT_DEBUG 0x420
#define DETECT_DISCONNECT (~DETECT_DEBUG & 0xffff)
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)
{
int is_debug, current_map;
disable_sleep(SLEEP_MASK_RDD);
current_map = 0xffff & GREAD(RDD, PROG_DEBUG_STATE_MAP);
is_debug = debug_cable_is_attached();
if (is_debug && (current_map == DETECT_DEBUG)) {
CPRINTS("Debug Accessory connected");
/* Detect when debug cable is disconnected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, DETECT_DISCONNECT);
rdd_attached();
} else if (!is_debug && (current_map == DETECT_DISCONNECT)) {
CPRINTS("Debug Accessory disconnected");
/* Detect when debug cable is connected */
GWRITE(RDD, PROG_DEBUG_STATE_MAP, DETECT_DEBUG);
rdd_detached();
cflush();
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);
GWRITE(RDD, PROG_DEBUG_STATE_MAP, DETECT_DEBUG);
/* Initialize the debug state based on the current cc values */
rdd_interrupt();
/* 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);
|
