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/* 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.
*/
/* Honeybuns board configuration */
#include "adc.h"
#include "adc_chip.h"
#include "common.h"
#include "console.h"
#include "ec_version.h"
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "registers.h"
#include "task.h"
#include "timer.h"
#include "usb_bb.h"
#include "usb_descriptor.h"
#include "usb_pd.h"
#include "util.h"
static volatile uint64_t hpd_prev_ts;
static volatile int hpd_prev_level;
void vbus_event(enum gpio_signal signal)
{
ccprintf("VBUS!\n");
}
#include "gpio_list.h"
/**
* Hotplug detect deferred task
*
* Called after level change on hpd GPIO to evaluate (and debounce) what event
* has occurred. There are 3 events that occur on HPD:
* 1. low : downstream display sink is deattached
* 2. high : downstream display sink is attached
* 3. irq : downstream display sink signalling an interrupt.
*
* The debounce times for these various events are:
* HPD_USTREAM_DEBOUNCE_LVL : min pulse width of level value.
* HPD_USTREAM_DEBOUNCE_IRQ : min pulse width of IRQ low pulse.
*
* lvl(n-2) lvl(n-1) lvl prev_delta now_delta event
* ----------------------------------------------------
* 1 0 1 <IRQ n/a low glitch (ignore)
* 1 0 1 >IRQ <LVL irq
* x 0 1 n/a >LVL high
* 0 1 0 <LVL n/a high glitch (ignore)
* x 1 0 n/a >LVL low
*/
void hpd_irq_deferred(void)
{
pd_send_hpd(0, hpd_irq);
}
DECLARE_DEFERRED(hpd_irq_deferred);
void hpd_lvl_deferred(void)
{
int level = gpio_get_level(GPIO_DP_HPD);
if (level != hpd_prev_level)
/* It's a glitch while in deferred or canceled action */
return;
pd_send_hpd(0, (level) ? hpd_high : hpd_low);
}
DECLARE_DEFERRED(hpd_lvl_deferred);
void hpd_event(enum gpio_signal signal)
{
timestamp_t now = get_time();
int level = gpio_get_level(signal);
uint64_t cur_delta = now.val - hpd_prev_ts;
/* store current time */
hpd_prev_ts = now.val;
/* All previous hpd level events need to be re-triggered */
hook_call_deferred(&hpd_lvl_deferred_data, -1);
/* It's a glitch. Previous time moves but level is the same. */
if (cur_delta < HPD_USTREAM_DEBOUNCE_IRQ)
return;
if ((!hpd_prev_level && level) &&
(cur_delta < HPD_USTREAM_DEBOUNCE_LVL))
/* It's an irq */
hook_call_deferred(&hpd_irq_deferred_data, 0);
else if (cur_delta >= HPD_USTREAM_DEBOUNCE_LVL)
hook_call_deferred(&hpd_lvl_deferred_data,
HPD_USTREAM_DEBOUNCE_LVL);
hpd_prev_level = level;
}
static void honeybuns_test_led_update(void)
{
static int toggle_count;
toggle_count++;
gpio_set_level(GPIO_TP6, toggle_count&1);
}
DECLARE_HOOK(HOOK_TICK, honeybuns_test_led_update, HOOK_PRIO_DEFAULT);
/* Initialize board. */
void board_config_pre_init(void)
{
/* enable SYSCFG clock */
STM32_RCC_APB2ENR |= 1 << 0;
/*
* the DMA mapping is :
* Chan 2 : TIM1_CH1 (C0 RX)
* Chan 3 : SPI1_TX (C0 TX)
* Chan 4 : USART1_TX
* Chan 5 : USART1_RX
* Chan 6 :
* Chan 7 :
*/
/* Remap USART DMA to match the USART driver */
STM32_SYSCFG_CFGR1 |= (1 << 9) | (1 << 10);
}
/* Initialize board. */
static void board_init(void)
{
timestamp_t now;
now = get_time();
hpd_prev_level = gpio_get_level(GPIO_DP_HPD);
hpd_prev_ts = now.val;
gpio_enable_interrupt(GPIO_DP_HPD);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
/* ADC channels */
const struct adc_t adc_channels[] = {
/* USB PD CC lines sensing. Converted to mV (3300mV/4096). */
[ADC_CH_CC1_PD] = {"CC1_PD", 3300, 4096, 0, STM32_AIN(1)},
/* VBUS sense via 100k/8.8k voltage divder 3.3V -> 40.8V */
[ADC_CH_VIN_DIV_P] = {"VIN_DIV_P", 40800, 4096, 0, STM32_AIN(5)},
[ADC_CH_VIN_DIV_N] = {"VIN_DIV_N", 40800, 4096, 0, STM32_AIN(6)},
};
BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
/* I2C ports */
const struct i2c_port_t i2c_ports[] = {
{"master", I2C_PORT_MASTER, 100,
GPIO_MASTER_I2C_SCL, GPIO_MASTER_I2C_SDA},
};
const unsigned int i2c_ports_used = ARRAY_SIZE(i2c_ports);
const void * const usb_strings[] = {
[USB_STR_DESC] = usb_string_desc,
[USB_STR_VENDOR] = USB_STRING_DESC("Google Inc."),
[USB_STR_PRODUCT] = USB_STRING_DESC("Honeybuns"),
[USB_STR_VERSION] = USB_STRING_DESC(CROS_EC_VERSION32),
[USB_STR_BB_URL] = USB_STRING_DESC(USB_GOOGLE_TYPEC_URL),
};
BUILD_ASSERT(ARRAY_SIZE(usb_strings) == USB_STR_COUNT);
/**
* USB configuration
* Any type-C device with alternate mode capabilities must have the following
* set of descriptors.
*
* 1. Standard Device
* 2. BOS
* 2a. Container ID
* 2b. Billboard Caps
*/
struct my_bos {
struct usb_bos_hdr_descriptor bos;
struct usb_contid_caps_descriptor contid_caps;
struct usb_bb_caps_base_descriptor bb_caps;
struct usb_bb_caps_svid_descriptor bb_caps_svids[1];
};
static struct my_bos bos_desc = {
.bos = {
.bLength = USB_DT_BOS_SIZE,
.bDescriptorType = USB_DT_BOS,
.wTotalLength = (USB_DT_BOS_SIZE + USB_DT_CONTID_SIZE +
USB_BB_CAPS_BASE_SIZE +
USB_BB_CAPS_SVID_SIZE * 1),
.bNumDeviceCaps = 2, /* contid + bb_caps */
},
.contid_caps = {
.bLength = USB_DT_CONTID_SIZE,
.bDescriptorType = USB_DT_DEVICE_CAPABILITY,
.bDevCapabilityType = USB_DC_DTYPE_CONTID,
.bReserved = 0,
.ContainerID = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
},
.bb_caps = {
.bLength = (USB_BB_CAPS_BASE_SIZE + USB_BB_CAPS_SVID_SIZE * 1),
.bDescriptorType = USB_DT_DEVICE_CAPABILITY,
.bDevCapabilityType = USB_DC_DTYPE_BILLBOARD,
.iAdditionalInfoURL = USB_STR_BB_URL,
.bNumberOfAlternateModes = 1,
.bPreferredAlternateMode = 1,
.VconnPower = 0,
.bmConfigured = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
},
.bReserved = 0,
},
.bb_caps_svids = {
{
.wSVID = USB_SID_DISPLAYPORT,
.bAlternateMode = 1,
.iAlternateModeString = USB_STR_BB_URL,
},
},
};
const struct bos_context bos_ctx = {
.descp = (void *)&bos_desc,
.size = sizeof(struct my_bos),
};
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