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
|
/* Copyright 2022 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.
*/
/* Nissa sub-board hardware configuration */
#include <ap_power/ap_power.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/sys/printk.h>
#include "driver/tcpm/tcpci.h"
#include "gpio/gpio_int.h"
#include "hooks.h"
#include "usb_charge.h"
#include "usb_pd.h"
#include "task.h"
#include "nissa_common.h"
LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
static void hdmi_power_handler(struct ap_power_ev_callback *cb,
struct ap_power_ev_data data)
{
/* Enable rails for S3 */
const struct gpio_dt_spec *s3_rail =
GPIO_DT_FROM_ALIAS(gpio_hdmi_en_odl);
/* Connect AP's DDC to sub-board (default is USB-C aux) */
const struct gpio_dt_spec *ddc_select =
GPIO_DT_FROM_NODELABEL(gpio_hdmi_sel);
switch (data.event) {
case AP_POWER_PRE_INIT:
LOG_DBG("Connecting HDMI DDC to sub-board");
gpio_pin_set_dt(ddc_select, 1);
break;
case AP_POWER_STARTUP:
LOG_DBG("Enabling HDMI VCC");
gpio_pin_set_dt(s3_rail, 1);
break;
case AP_POWER_SHUTDOWN:
LOG_DBG("Disabling HDMI VCC");
gpio_pin_set_dt(s3_rail, 0);
break;
case AP_POWER_HARD_OFF:
LOG_DBG("Disconnecting HDMI sub-board DDC");
gpio_pin_set_dt(ddc_select, 0);
break;
default:
LOG_ERR("Unhandled HDMI power event %d", data.event);
break;
}
}
static void hdmi_hpd_interrupt(const struct device *device,
struct gpio_callback *callback,
gpio_port_pins_t pins)
{
int state = gpio_pin_get_dt(GPIO_DT_FROM_ALIAS(gpio_hpd_odl));
gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_ec_soc_hdmi_hpd), state);
LOG_DBG("HDMI HPD changed state to %d", state);
}
static void lte_power_handler(struct ap_power_ev_callback *cb,
struct ap_power_ev_data data)
{
/* Enable rails for S5 */
const struct gpio_dt_spec *s5_rail =
GPIO_DT_FROM_ALIAS(gpio_en_sub_s5_rails);
switch (data.event) {
case AP_POWER_PRE_INIT:
LOG_DBG("Enabling LTE sub-board power rails");
gpio_pin_set_dt(s5_rail, 1);
break;
case AP_POWER_SHUTDOWN:
LOG_DBG("Disabling LTE sub-board power rails");
gpio_pin_set_dt(s5_rail, 0);
break;
default:
LOG_ERR("Unhandled LTE power event %d", data.event);
break;
}
}
/**
* Configure GPIOs (and other pin functions) that vary with present sub-board.
*
* The functions of some pins vary according to which sub-board is present
* (indicated by CBI fw_config); this function configures them according to the
* needs of the present sub-board.
*/
static void nereid_subboard_config(void)
{
enum nissa_sub_board_type sb = nissa_get_sb_type();
static struct ap_power_ev_callback power_cb;
/*
* USB-A port: current limit output is configured by default and unused
* if this port is not present. VBUS enable must be configured if
* needed and is controlled by the usba-port-enable-pins driver.
*/
if (sb == NISSA_SB_C_A || sb == NISSA_SB_HDMI_A) {
/* Configure VBUS enable, default off */
gpio_pin_configure_dt(
GPIO_DT_FROM_ALIAS(gpio_en_usb_a1_vbus),
GPIO_OUTPUT_LOW);
} else {
/* Turn off unused pins */
gpio_pin_configure_dt(
GPIO_DT_FROM_NODELABEL(gpio_sub_usb_a1_ilimit_sdp),
GPIO_DISCONNECTED);
gpio_pin_configure_dt(
GPIO_DT_FROM_ALIAS(gpio_en_usb_a1_vbus),
GPIO_DISCONNECTED);
/* Disable second USB-A port enable GPIO */
__ASSERT(USB_PORT_ENABLE_COUNT == 2,
"USB A port count != 2 (%d)", USB_PORT_ENABLE_COUNT);
usb_port_enable[1] = -1;
}
/*
* USB-C port: the default configuration has I2C on the I2C pins,
* but the interrupt line needs to be configured.
*/
if (sb == NISSA_SB_C_A || sb == NISSA_SB_C_LTE) {
/* Configure interrupt input */
gpio_pin_configure_dt(
GPIO_DT_FROM_ALIAS(gpio_usb_c1_int_odl),
GPIO_INPUT | GPIO_PULL_UP);
} else {
/* Disable the port 1 charger task */
task_disable_task(TASK_ID_USB_CHG_P1);
usb_muxes[1].next_mux = NULL;
}
switch (sb) {
case NISSA_SB_HDMI_A: {
/*
* HDMI: two outputs control power which must be configured to
* non-default settings, and HPD must be forwarded to the AP
* on another output pin.
*/
const struct gpio_dt_spec *hpd_gpio =
GPIO_DT_FROM_ALIAS(gpio_hpd_odl);
static struct gpio_callback hdmi_hpd_cb;
int rv, irq_key;
/* HDMI power enable outputs */
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_rails_odl),
GPIO_OUTPUT_INACTIVE | GPIO_OPEN_DRAIN |
GPIO_PULL_UP | GPIO_ACTIVE_LOW);
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_hdmi_en_odl),
GPIO_OUTPUT_INACTIVE | GPIO_OPEN_DRAIN |
GPIO_ACTIVE_LOW);
/* Control HDMI power in concert with AP */
ap_power_ev_init_callback(
&power_cb, hdmi_power_handler,
AP_POWER_PRE_INIT | AP_POWER_HARD_OFF |
AP_POWER_STARTUP | AP_POWER_SHUTDOWN);
ap_power_ev_add_callback(&power_cb);
/*
* Configure HPD input from sub-board; it's inverted by a buffer
* on the sub-board.
*/
gpio_pin_configure_dt(hpd_gpio, GPIO_INPUT | GPIO_ACTIVE_LOW);
/* Register interrupt handler for HPD changes */
gpio_init_callback(&hdmi_hpd_cb, hdmi_hpd_interrupt,
BIT(hpd_gpio->pin));
gpio_add_callback(hpd_gpio->port, &hdmi_hpd_cb);
rv = gpio_pin_interrupt_configure_dt(hpd_gpio,
GPIO_INT_EDGE_BOTH);
__ASSERT(rv == 0,
"HPD interrupt configuration returned error %d", rv);
/*
* Run the HPD handler once to ensure output is in sync.
* Lock interrupts to ensure that we don't cause desync if an
* HPD interrupt comes in between the internal read of the input
* and write to the output.
*/
irq_key = irq_lock();
hdmi_hpd_interrupt(hpd_gpio->port, &hdmi_hpd_cb,
BIT(hpd_gpio->pin));
irq_unlock(irq_key);
break;
}
case NISSA_SB_C_LTE:
/*
* LTE: Set up callbacks for enabling/disabling
* sub-board power on S5 state.
*/
gpio_pin_configure_dt(GPIO_DT_FROM_ALIAS(gpio_en_sub_s5_rails),
GPIO_OUTPUT_INACTIVE);
/* Control LTE power when CPU entering or
* exiting S5 state.
*/
ap_power_ev_init_callback(
&power_cb, lte_power_handler,
AP_POWER_SHUTDOWN | AP_POWER_PRE_INIT);
ap_power_ev_add_callback(&power_cb);
break;
default:
break;
}
}
DECLARE_HOOK(HOOK_INIT, nereid_subboard_config, HOOK_PRIO_POST_FIRST);
/*
* Enable interrupts
*/
static void board_init(void)
{
/*
* Enable USB-C interrupts.
*/
gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c0));
if (board_get_usb_pd_port_count() == 2)
gpio_enable_dt_interrupt(GPIO_INT_FROM_NODELABEL(int_usb_c1));
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
/* Trigger shutdown by enabling the Z-sleep circuit */
__override void board_hibernate_late(void)
{
gpio_pin_set_dt(GPIO_DT_FROM_NODELABEL(gpio_en_slp_z), 1);
/*
* The system should hibernate, but there may be
* a small delay, so return.
*/
}
|
