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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/* Copyright 2015 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.
*/
/* USB mux high-level driver. */
#include "common.h"
#include "console.h"
#include "host_command.h"
#include "usb_mux.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
static int enable_debug_prints;
/*
* Flags will reset to 0 after sysjump; This works for current flags as LPM will
* get reset in the init method which is called during PD task startup.
*/
static uint8_t flags[CONFIG_USB_PD_PORT_COUNT];
#define USB_MUX_FLAG_IN_LPM (1 << 0) /* Device is in low power mode. */
static void enter_low_power_mode(int port)
{
const struct usb_mux *mux = &usb_muxes[port];
int res;
/*
* Set LPM flag regardless of method presence or method failure. We want
* know know that we tried to put the device in low power mode so we can
* re-initialize the device on the next access.
*/
flags[port] |= USB_MUX_FLAG_IN_LPM;
/* Apply any low power customization if present */
if (mux->driver->enter_low_power_mode) {
res = mux->driver->enter_low_power_mode(port);
if (res)
CPRINTS("Err: enter_low_power_mode mux port(%d): %d",
port, res);
}
}
static inline void exit_low_power_mode(int port)
{
/* If we are in low power, initialize device (which clears LPM flag) */
if (flags[port] & USB_MUX_FLAG_IN_LPM)
usb_mux_init(port);
}
void usb_mux_init(int port)
{
const struct usb_mux *mux = &usb_muxes[port];
int res;
ASSERT(port >= 0 && port < CONFIG_USB_PD_PORT_COUNT);
res = mux->driver->init(port);
if (res) {
CPRINTS("Err: init mux port(%d): %d", port, res);
return;
}
/* Device is always out of LPM after initialization. */
flags[port] &= ~USB_MUX_FLAG_IN_LPM;
/* Apply board specific initialization */
if (mux->board_init) {
res = mux->board_init(port);
if (res)
CPRINTS("Err: board_init mux port(%d): %d", port, res);
}
}
/*
* TODO(crbug.com/505480): Setting muxes often involves I2C transcations,
* which can block. Consider implementing an asynchronous task.
*/
void usb_mux_set(int port, enum typec_mux mux_mode,
enum usb_switch usb_mode, int polarity)
{
const struct usb_mux *mux = &usb_muxes[port];
int res;
mux_state_t mux_state;
const int should_enter_low_power_mode =
mux_mode == TYPEC_MUX_NONE && usb_mode == USB_SWITCH_DISCONNECT;
#ifdef CONFIG_USB_CHARGER
/* Configure USB2.0 */
usb_charger_set_switches(port, usb_mode);
#endif
/*
* Don't wake device up just to put it back to sleep. Low power mode
* flag is only set if the mux set() operation succeeded previously for
* the same disconnected state.
*/
if (should_enter_low_power_mode && (flags[port] & USB_MUX_FLAG_IN_LPM))
return;
exit_low_power_mode(port);
/* Configure superspeed lanes */
mux_state = polarity ? mux_mode | MUX_POLARITY_INVERTED : mux_mode;
res = mux->driver->set(port, mux_state);
if (res) {
CPRINTS("Err: set mux port(%d): %d", port, res);
return;
}
if (enable_debug_prints)
CPRINTS(
"usb/dp mux: port(%d) typec_mux(%d) usb2(%d) polarity(%d)",
port, mux_mode, usb_mode, polarity);
/*
* If we are completely disconnecting the mux, then we should put it in
* its lowest power state.
*/
if (should_enter_low_power_mode)
enter_low_power_mode(port);
}
int usb_mux_get(int port, const char **dp_str, const char **usb_str)
{
const struct usb_mux *mux = &usb_muxes[port];
int res;
mux_state_t mux_state;
const char *dp, *usb;
exit_low_power_mode(port);
res = mux->driver->get(port, &mux_state);
if (res) {
CPRINTS("Err: get mux port(%d): %d", port, res);
return 0;
}
dp = mux_state & MUX_POLARITY_INVERTED ? "DP2" : "DP1";
usb = mux_state & MUX_POLARITY_INVERTED ? "USB2" : "USB1";
*dp_str = mux_state & MUX_DP_ENABLED ? dp : NULL;
*usb_str = mux_state & MUX_USB_ENABLED ? usb : NULL;
return *dp_str || *usb_str;
}
void usb_mux_flip(int port)
{
const struct usb_mux *mux = &usb_muxes[port];
int res;
mux_state_t mux_state;
exit_low_power_mode(port);
res = mux->driver->get(port, &mux_state);
if (res) {
CPRINTS("Err: get mux port(%d): %d", port, res);
return;
}
if (mux_state & MUX_POLARITY_INVERTED)
mux_state &= ~MUX_POLARITY_INVERTED;
else
mux_state |= MUX_POLARITY_INVERTED;
res = mux->driver->set(port, mux_state);
if (res)
CPRINTS("Err: set mux port(%d): %d", port, res);
}
#ifdef CONFIG_CMD_TYPEC
static int command_typec(int argc, char **argv)
{
const char * const mux_name[] = {"none", "usb", "dp", "dock"};
char *e;
int port;
enum typec_mux mux = TYPEC_MUX_NONE;
int i;
if (argc == 2 && !strcasecmp(argv[1], "debug")) {
enable_debug_prints = 1;
return EC_SUCCESS;
}
if (argc < 2)
return EC_ERROR_PARAM_COUNT;
port = strtoi(argv[1], &e, 10);
if (*e || port >= CONFIG_USB_PD_PORT_COUNT)
return EC_ERROR_PARAM1;
if (argc < 3) {
const char *dp_str, *usb_str;
ccprintf("Port C%d: polarity:CC%d\n",
port, pd_get_polarity(port) + 1);
if (usb_mux_get(port, &dp_str, &usb_str))
ccprintf("Superspeed %s%s%s\n",
dp_str ? dp_str : "",
dp_str && usb_str ? "+" : "",
usb_str ? usb_str : "");
else
ccprintf("No Superspeed connection\n");
return EC_SUCCESS;
}
for (i = 0; i < ARRAY_SIZE(mux_name); i++)
if (!strcasecmp(argv[2], mux_name[i]))
mux = i;
usb_mux_set(port, mux, mux == TYPEC_MUX_NONE ?
USB_SWITCH_DISCONNECT :
USB_SWITCH_CONNECT,
pd_get_polarity(port));
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(typec, command_typec,
"[port|debug] [none|usb|dp|dock]",
"Control type-C connector muxing");
#endif
static int hc_usb_pd_mux_info(struct host_cmd_handler_args *args)
{
const struct ec_params_usb_pd_mux_info *p = args->params;
struct ec_response_usb_pd_mux_info *r = args->response;
int port = p->port;
const struct usb_mux *mux;
if (port >= CONFIG_USB_PD_PORT_COUNT)
return EC_RES_INVALID_PARAM;
mux = &usb_muxes[port];
if (mux->driver->get(port, &r->flags) != EC_SUCCESS)
return EC_RES_ERROR;
#ifdef CONFIG_USB_MUX_VIRTUAL
/* Clear HPD IRQ event since we're about to inform host of it. */
if ((r->flags & USB_PD_MUX_HPD_IRQ) &&
mux->hpd_update == &virtual_hpd_update)
mux->hpd_update(port, 0, 0);
#endif
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_MUX_INFO,
hc_usb_pd_mux_info,
EC_VER_MASK(0));
|
