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esp-idf/components/usb/hub.c
Darian Leung accbaee57c Add USB Host Library 
This commit adds the preliminary version of the USB Host Library. This commit contains:

- USBH (USB Host Driver)
- Hub Driver that only supports a single device and device enumeration
- USB Host Library (asychronous API)
- Test cases for USB Host Library asychronous API

The following changes were made to the existing HCD:
- Removed HCD_PIPE_STATE_INVALID. Pipes are no longer invalidated
- Changed pipe commands to halt, flush, and clear. Pipes need to be manually
  halted, flush, and cleared.
- Halting and flushing a pipe will execute the pipe callback if it causes a
  HCD_PIPE_EVENT_URB_DONE event
2021-08-24 23:28:00 +08:00

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/*
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include <stdlib.h>
#include "freertos/FreeRTOS.h"
#include "freertos/portmacro.h"
#include "esp_err.h"
#include "esp_heap_caps.h"
#include "esp_log.h"
#include "usb_private.h"
#include "hcd.h"
#include "hub.h"
/*
Implementation of the HUB driver that only supports the root hub with a single port. Therefore, we currently don't
implement the bare minimum to control the root HCD port.
*/
#define HUB_ROOT_PORT_NUM 1 //HCD only supports one port
#ifdef CONFIG_USB_HOST_HW_BUFFER_BIAS_IN
#define HUB_ROOT_HCD_PORT_FIFO_BIAS HCD_PORT_FIFO_BIAS_RX
#elif CONFIG_USB_HOST_HW_BUFFER_BIAS_PERIODIC_OUT
#define HUB_ROOT_HCD_PORT_FIFO_BIAS HCD_PORT_FIFO_BIAS_PTX
#else //CONFIG_USB_HOST_HW_BUFFER_BIAS_BALANCED
#define HUB_ROOT_HCD_PORT_FIFO_BIAS HCD_PORT_FIFO_BIAS_BALANCED
#endif
#define ENUM_CTRL_TRANSFER_MAX_LEN CONFIG_USB_HOST_CONTROL_TRANSFER_MAX_SIZE
#define ENUM_DEV_ADDR 1 //Device address used in enumeration
#define ENUM_CONFIG_INDEX 0 //Index of the first configuration of the device
#define ENUM_DEV_DESC_REQ_SIZE 64 //Worst case size for device descriptor request
#define ENUM_LOW_SPEED_MPS 8 //Worst case MPS for the default endpoint of a low-speed device
#define ENUM_FULL_SPEED_MPS 64 //Worst case MPS for the default endpoint of a full-speed device
#define HUB_DRIVER_FLAG_ACTION_ROOT_EVENT 0x01
#define HUB_DRIVER_FLAG_ACTION_ENUM_EVENT 0x02
#define HUB_DRIVER_FLAG_ACTION_PORT_RECOVER 0x04
typedef enum {
HUB_DRIVER_STATE_INSTALLED,
HUB_DRIVER_STATE_ROOT_POWERD,
HUB_DRIVER_STATE_ROOT_ENUMERATING,
HUB_DRIVER_STATE_ROOT_ACTIVE,
HUB_DRIVER_STATE_ROOT_RECOVERY,
} hub_driver_state_t;
typedef enum {
ENUM_STAGE_NONE, /**< There is no device awaiting enumeration */
ENUM_STAGE_START, /**< Start of enumeration. Allocates device object */
ENUM_STAGE_GET_SHORT_DEV_DESC, /**< Getting short device descriptor */
ENUM_STAGE_GET_SHORT_DEV_DESC_CHECK, /**< Check that short device descriptor was obtained */
ENUM_STAGE_SECOND_RESET, /**< Doing second reset */
ENUM_STAGE_SET_ADDR, /**< Setting address */
ENUM_STAGE_SET_ADDR_CHECK, /**< Check that address was set successful */
ENUM_STAGE_GET_FULL_DEV_DESC, /**< Getting full device descriptor */
ENUM_STAGE_GET_FULL_DEV_DESC_CHECK, /**< Check that full device descriptor was obtained */
ENUM_STAGE_GET_CONFIG_DESC, /**< Getting full configuration descriptor */
ENUM_STAGE_GET_CONFIG_DESC_CHECK, /**< Check that full configuration descriptor was obtained */
ENUM_STAGE_SET_CONFIG, /**< Set configuration number */
ENUM_STAGE_SET_CONFIG_CHECK, /**< Check that configuration number was set */
ENUM_STAGE_CLEANUP, /**< Clean up successful enumeration. Adds enumerated device to USBH */
ENUM_STAGE_CLEANUP_FAILED, /**< Cleanup failed enumeration. Free device resources */
} enum_stage_t;
typedef struct {
//Dynamic members require a critical section
struct {
union {
struct {
uint32_t actions: 8;
uint32_t reserved24: 24;
};
uint32_t val;
} flags;
hub_driver_state_t driver_state;
usb_device_handle_t root_dev_hdl; //Indicates if an enumerated device is connected to the root port
} dynamic;
//Single thread members don't require a critical section so long as they are never accessed from multiple threads
struct {
enum_stage_t enum_stage;
urb_t *enum_urb;
usb_device_handle_t enum_dev_hdl; //Handle of the device being enumerated. Moves to root_dev_hdl on enumeration completion
hcd_pipe_handle_t enum_dflt_pipe_hdl;
} single_thread;
//Constant members do no change after installation thus do not require a critical section
struct {
hcd_port_handle_t root_port_hdl;
usb_notif_cb_t notif_cb;
void *notif_cb_arg;
} constant;
} hub_driver_t;
static hub_driver_t *p_hub_driver_obj = NULL;
static portMUX_TYPE hub_driver_lock = portMUX_INITIALIZER_UNLOCKED;
const char *HUB_DRIVER_TAG = "HUB";
#define HUB_DRIVER_ENTER_CRITICAL_ISR() portENTER_CRITICAL_ISR(&hub_driver_lock)
#define HUB_DRIVER_EXIT_CRITICAL_ISR() portEXIT_CRITICAL_ISR(&hub_driver_lock)
#define HUB_DRIVER_ENTER_CRITICAL() portENTER_CRITICAL(&hub_driver_lock)
#define HUB_DRIVER_EXIT_CRITICAL() portEXIT_CRITICAL(&hub_driver_lock)
#define HUB_DRIVER_ENTER_CRITICAL_SAFE() portENTER_CRITICAL_SAFE(&hub_driver_lock)
#define HUB_DRIVER_EXIT_CRITICAL_SAFE() portEXIT_CRITICAL_SAFE(&hub_driver_lock)
#define HUB_DRIVER_CHECK(cond, ret_val) ({ \
if (!(cond)) { \
return (ret_val); \
} \
})
#define HUB_DRIVER_CHECK_FROM_CRIT(cond, ret_val) ({ \
if (!(cond)) { \
HUB_DRIVER_EXIT_CRITICAL(); \
return ret_val; \
} \
})
// ------------------------------------------------- Event Handling ----------------------------------------------------
// ---------------------- Callbacks ------------------------
static bool root_port_callback(hcd_port_handle_t port_hdl, hcd_port_event_t port_event, void *user_arg, bool in_isr)
{
HUB_DRIVER_ENTER_CRITICAL_SAFE();
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ROOT_EVENT;
HUB_DRIVER_EXIT_CRITICAL_SAFE();
bool yield;
if (in_isr) {
p_hub_driver_obj->constant.notif_cb(USB_NOTIF_SOURCE_HUB, in_isr, p_hub_driver_obj->constant.notif_cb_arg);
} else {
yield = false;
}
return yield;
}
static bool enum_dflt_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr)
{
//Note: This callback may have triggered when a failed enumeration is already cleaned up (e.g., due to a failed port reset)
HUB_DRIVER_ENTER_CRITICAL_SAFE();
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT;
HUB_DRIVER_EXIT_CRITICAL_SAFE();
return p_hub_driver_obj->constant.notif_cb(USB_NOTIF_SOURCE_HUB, in_isr, p_hub_driver_obj->constant.notif_cb_arg);
}
static void usbh_hub_callback(hcd_port_handle_t port_hdl, usbh_hub_event_t hub_event, void *arg)
{
//We currently only support the root port
assert(port_hdl == p_hub_driver_obj->constant.root_port_hdl);
HUB_DRIVER_ENTER_CRITICAL();
//Any hub_event results in whatever device connected to the root port to no longer be valid. We clear root_dev_hdl here.
usb_device_handle_t dev_hdl = p_hub_driver_obj->dynamic.root_dev_hdl;
p_hub_driver_obj->dynamic.root_dev_hdl = NULL;
assert(dev_hdl);
bool call_port_disable = false;
switch (hub_event) {
case USBH_HUB_EVENT_CLEANUP_PORT:
//After USBH has cleaned up gone device. The port can be recovered.
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_RECOVER;
break;
case USBH_HUB_EVENT_DISABLE_PORT:
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_POWERD;
call_port_disable = true;
break;
default:
abort(); //Should never occur
break;
}
HUB_DRIVER_EXIT_CRITICAL();
if (call_port_disable) {
ESP_LOGD(HUB_DRIVER_TAG, "Disabling root port");
hcd_port_command(port_hdl, HCD_PORT_CMD_DISABLE);
ESP_ERROR_CHECK(usbh_hub_dev_port_disabled(dev_hdl));
}
}
// ---------------------- Handlers -------------------------
static void root_port_handle_events(hcd_port_handle_t root_port_hdl)
{
hcd_port_event_t port_event = hcd_port_handle_event(root_port_hdl);
switch (port_event) {
case HCD_PORT_EVENT_NONE:
//Nothing to do
break;
case HCD_PORT_EVENT_CONNECTION: {
if (hcd_port_command(root_port_hdl, HCD_PORT_CMD_RESET) == ESP_OK) {
ESP_LOGD(HUB_DRIVER_TAG, "Root port reset");
//Start enumeration
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT;
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_ENUMERATING;
HUB_DRIVER_EXIT_CRITICAL();
p_hub_driver_obj->single_thread.enum_stage = ENUM_STAGE_START;
} else {
ESP_LOGE(HUB_DRIVER_TAG, "Root port reset failed");
}
break;
}
case HCD_PORT_EVENT_DISCONNECTION:
case HCD_PORT_EVENT_ERROR:
case HCD_PORT_EVENT_OVERCURRENT: {
usb_device_handle_t dev_hdl = NULL;
HUB_DRIVER_ENTER_CRITICAL();
switch (p_hub_driver_obj->dynamic.driver_state) {
case HUB_DRIVER_STATE_ROOT_POWERD:
//This occurred before enumeration. Therefore, there's no device and we can go straight to port recovery
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT;
break;
case HUB_DRIVER_STATE_ROOT_ENUMERATING:
//This occurred during enumeration. Therefore, we need to recover the failed enumeration
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT;
p_hub_driver_obj->single_thread.enum_stage = ENUM_STAGE_CLEANUP_FAILED;
break;
case HUB_DRIVER_STATE_ROOT_ACTIVE:
//There was an enumerated device. We need to indicate to USBH that the device is gone
dev_hdl = p_hub_driver_obj->dynamic.root_dev_hdl;
break;
default:
abort(); //Should never occur
break;
}
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_RECOVERY;
HUB_DRIVER_EXIT_CRITICAL();
if (dev_hdl) {
ESP_ERROR_CHECK(usbh_hub_mark_dev_gone(dev_hdl));
}
break;
}
default:
abort(); //Should never occur
break;
}
}
// ------------------------------------------------- Enum Functions ----------------------------------------------------
static enum_stage_t enum_stage_start(void)
{
usb_speed_t speed;
if (hcd_port_get_speed(p_hub_driver_obj->constant.root_port_hdl, &speed) != ESP_OK) {
return ENUM_STAGE_NONE;
}
usb_device_handle_t enum_dev_hdl;
hcd_pipe_handle_t enum_dflt_pipe_hdl;
//We use NULL as the parent device to indicate the root hub port 1. We currently only support a single device
if (usbh_hub_add_dev(p_hub_driver_obj->constant.root_port_hdl, speed, &enum_dev_hdl, &enum_dflt_pipe_hdl) != ESP_OK) {
return ENUM_STAGE_NONE;
}
//Set our own default pipe callback
ESP_ERROR_CHECK(hcd_pipe_update_callback(enum_dflt_pipe_hdl, enum_dflt_pipe_callback, NULL));
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->single_thread.enum_dev_hdl = enum_dev_hdl;
p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl = enum_dflt_pipe_hdl;
HUB_DRIVER_EXIT_CRITICAL();
ESP_LOGD(HUB_DRIVER_TAG, "Enumeration starting");
return ENUM_STAGE_GET_SHORT_DEV_DESC;
}
static enum_stage_t enum_stage_get_short_dev_desc(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
USB_SETUP_PACKET_INIT_GET_DEVICE_DESC((usb_setup_packet_t *)enum_urb->transfer.data_buffer);
enum_urb->transfer.num_bytes = sizeof(usb_setup_packet_t) + ENUM_DEV_DESC_REQ_SIZE;
if (hcd_urb_enqueue(pipe_hdl, enum_urb) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to get short device descriptor");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Getting short device descriptor");
return ENUM_STAGE_GET_SHORT_DEV_DESC_CHECK;
}
static enum_stage_t enum_stage_check_short_dev_desc(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
//Dequeue the URB
urb_t *dequeued_enum_urb = hcd_urb_dequeue(pipe_hdl);
assert(dequeued_enum_urb == enum_urb);
if (enum_urb->transfer.status != USB_TRANSFER_STATUS_COMPLETED) {
ESP_LOGE(HUB_DRIVER_TAG, "Short device descriptor transfer failed");
return ENUM_STAGE_CLEANUP_FAILED;
}
usb_device_desc_t *device_desc = (usb_device_desc_t *)(enum_urb->transfer.data_buffer + sizeof(usb_setup_packet_t));
if (enum_urb->transfer.actual_num_bytes < sizeof(usb_setup_packet_t) + 8) { //Device must return at least 8 bytes in its data stage
ESP_LOGE(HUB_DRIVER_TAG, "Short device descriptor too short");
return ENUM_STAGE_CLEANUP_FAILED;
}
//Update the MPS of the default pipe
if (hcd_pipe_update_mps(pipe_hdl, device_desc->bMaxPacketSize0) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to update default pipe MPS");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Short device descriptor obtained");
return ENUM_STAGE_SECOND_RESET;
}
static enum_stage_t enum_stage_second_reset(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
ESP_ERROR_CHECK(hcd_pipe_set_persist_reset(pipe_hdl)); //Persist the default pipe through the reset
if (hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_RESET) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to issue second reset");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Second reset done");
return ENUM_STAGE_SET_ADDR;
}
static enum_stage_t enum_stage_set_addr(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
USB_SETUP_PACKET_INIT_SET_ADDR((usb_setup_packet_t *)enum_urb->transfer.data_buffer, ENUM_DEV_ADDR);
enum_urb->transfer.num_bytes = sizeof(usb_setup_packet_t); //No data stage
if (hcd_urb_enqueue(pipe_hdl, enum_urb) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to set address");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Setting address %d", ENUM_DEV_ADDR);
return ENUM_STAGE_SET_ADDR_CHECK;
}
static enum_stage_t enum_stage_check_set_addr(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb, usb_device_handle_t dev_hdl)
{
//Dequeue the URB
urb_t *dequeued_enum_urb = hcd_urb_dequeue(pipe_hdl);
assert(dequeued_enum_urb == enum_urb);
if (enum_urb->transfer.status != USB_TRANSFER_STATUS_COMPLETED) {
ESP_LOGE(HUB_DRIVER_TAG, "Set address transfer failed");
return ENUM_STAGE_CLEANUP_FAILED;
}
//Update the pipe and device's address, and fill the address into the device object
ESP_ERROR_CHECK(hcd_pipe_update_dev_addr(pipe_hdl, ENUM_DEV_ADDR));
ESP_ERROR_CHECK(usbh_hub_enum_fill_dev_addr(dev_hdl, ENUM_DEV_ADDR));
ESP_LOGD(HUB_DRIVER_TAG, "Address set successfully");
return ENUM_STAGE_GET_FULL_DEV_DESC;
}
static enum_stage_t enum_stage_get_full_dev_desc(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
USB_SETUP_PACKET_INIT_GET_DEVICE_DESC((usb_setup_packet_t *)enum_urb->transfer.data_buffer);
enum_urb->transfer.num_bytes = sizeof(usb_setup_packet_t) + ENUM_DEV_DESC_REQ_SIZE;
if (hcd_urb_enqueue(pipe_hdl, enum_urb) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to get full device descriptor");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Getting full device descriptor");
return ENUM_STAGE_GET_FULL_DEV_DESC_CHECK;
}
static enum_stage_t enum_stage_check_full_dev_desc(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb, usb_device_handle_t dev_hdl)
{
//Dequeue the URB
urb_t *dequeued_enum_urb = hcd_urb_dequeue(pipe_hdl);
assert(dequeued_enum_urb == enum_urb);
if (enum_urb->transfer.status != USB_TRANSFER_STATUS_COMPLETED) {
ESP_LOGE(HUB_DRIVER_TAG, "Full device descriptor transfer failed");
return ENUM_STAGE_CLEANUP_FAILED;
}
if (enum_urb->transfer.actual_num_bytes < sizeof(usb_setup_packet_t) + sizeof(usb_device_desc_t)) {
ESP_LOGE(HUB_DRIVER_TAG, "Full device descriptor too short");
return ENUM_STAGE_CLEANUP_FAILED;
}
//Fill device descriptor into device
const usb_device_desc_t *device_desc = (const usb_device_desc_t *)(enum_urb->transfer.data_buffer + sizeof(usb_setup_packet_t));
ESP_ERROR_CHECK(usbh_hub_enum_fill_dev_desc(dev_hdl, device_desc));
ESP_LOGD(HUB_DRIVER_TAG, "Full device descriptor obtained");
return ENUM_STAGE_GET_CONFIG_DESC;
}
static enum_stage_t enum_stage_get_config_desc(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
//Get the configuration descriptor at index 0
USB_SETUP_PACKET_INIT_GET_CONFIG_DESC((usb_setup_packet_t *)enum_urb->transfer.data_buffer, ENUM_CONFIG_INDEX, ENUM_CTRL_TRANSFER_MAX_LEN);
enum_urb->transfer.num_bytes = sizeof(usb_setup_packet_t) + ENUM_CTRL_TRANSFER_MAX_LEN;
if (hcd_urb_enqueue(pipe_hdl, enum_urb) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to get configuration descriptor");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Getting configuration descriptor");
return ENUM_STAGE_GET_CONFIG_DESC_CHECK;
}
static enum_stage_t enum_stage_check_config_desc(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb, usb_device_handle_t dev_hdl)
{
//Dequeue the URB
urb_t *dequeued_enum_urb = hcd_urb_dequeue(pipe_hdl);
assert(dequeued_enum_urb == enum_urb);
if (enum_urb->transfer.status != USB_TRANSFER_STATUS_COMPLETED) {
ESP_LOGE(HUB_DRIVER_TAG, "Configuration descriptor transfer failed");
return ENUM_STAGE_CLEANUP_FAILED;
}
usb_config_desc_t *config_desc = (usb_config_desc_t *)(enum_urb->transfer.data_buffer + sizeof(usb_setup_packet_t));
if (enum_urb->transfer.actual_num_bytes < sizeof(usb_setup_packet_t) + sizeof(usb_config_desc_t)) {
ESP_LOGE(HUB_DRIVER_TAG, "Configuration descriptor too small");
return ENUM_STAGE_CLEANUP_FAILED;
}
if (config_desc->wTotalLength > ENUM_CTRL_TRANSFER_MAX_LEN) {
ESP_LOGE(HUB_DRIVER_TAG, "Configuration descriptor larger than control transfer max length");
return ENUM_STAGE_CLEANUP_FAILED;
}
//Fill configuration descriptor into device
ESP_ERROR_CHECK(usbh_hub_enum_fill_config_desc(dev_hdl, config_desc));
return ENUM_STAGE_SET_CONFIG;
}
static enum_stage_t enum_stage_set_config(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
USB_SETUP_PACKET_INIT_SET_CONFIG((usb_setup_packet_t *)enum_urb->transfer.data_buffer, ENUM_CONFIG_INDEX + 1);
enum_urb->transfer.num_bytes = sizeof(usb_setup_packet_t); //No data stage
if (hcd_urb_enqueue(pipe_hdl, enum_urb) != ESP_OK) {
ESP_LOGE(HUB_DRIVER_TAG, "Failed to set configuration");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Setting configuration");
return ENUM_STAGE_SET_CONFIG_CHECK;
}
static enum_stage_t enum_stage_check_config(hcd_pipe_handle_t pipe_hdl, urb_t *enum_urb)
{
//Dequeue the URB
urb_t *dequeued_enum_urb = hcd_urb_dequeue(pipe_hdl);
assert(dequeued_enum_urb == enum_urb);
if (enum_urb->transfer.status != USB_TRANSFER_STATUS_COMPLETED) {
ESP_LOGE(HUB_DRIVER_TAG, "Set configuration transfer failed");
return ENUM_STAGE_CLEANUP_FAILED;
}
ESP_LOGD(HUB_DRIVER_TAG, "Configuration set successfully");
return ENUM_STAGE_CLEANUP;
}
static enum_stage_t enum_stage_cleanup(void)
{
//We currently only support a single device connected to the root port. Move the device handle from enum to root
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->dynamic.root_dev_hdl = p_hub_driver_obj->single_thread.enum_dev_hdl;
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_ACTIVE;
HUB_DRIVER_EXIT_CRITICAL();
usb_device_handle_t dev_hdl = p_hub_driver_obj->single_thread.enum_dev_hdl;
p_hub_driver_obj->single_thread.enum_dev_hdl = NULL;
p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl = NULL;
//Update device object after enumeration is done
ESP_ERROR_CHECK(usbh_hub_enum_done(dev_hdl));
return ENUM_STAGE_NONE;
}
static enum_stage_t enum_stage_cleanup_failed(void)
{
//Enumeration failed. Clear the enum device handle and pipe
usb_device_handle_t dev_hdl = p_hub_driver_obj->single_thread.enum_dev_hdl;
if (p_hub_driver_obj->single_thread.enum_dev_hdl) {
//Halt, flush, and dequeue enum default pipe
ESP_ERROR_CHECK(hcd_pipe_command(p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl, HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl, HCD_PIPE_CMD_FLUSH));
urb_t *dequeued_enum_urb = hcd_urb_dequeue(p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl);
assert(dequeued_enum_urb == p_hub_driver_obj->single_thread.enum_urb);
ESP_ERROR_CHECK(usbh_hub_enum_failed(dev_hdl)); //Free the underlying device object first before recovering the port
}
p_hub_driver_obj->single_thread.enum_dev_hdl = NULL;
p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl = NULL;
HUB_DRIVER_ENTER_CRITICAL();
//Enum could have failed due to a port error. If so, we need to trigger a port recovery
if (p_hub_driver_obj->dynamic.driver_state == HUB_DRIVER_STATE_ROOT_RECOVERY) {
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_PORT_RECOVER;
}
HUB_DRIVER_EXIT_CRITICAL();
return ENUM_STAGE_NONE;
}
static void enum_handle_events(void)
{
enum_stage_t cur_stage = p_hub_driver_obj->single_thread.enum_stage;
hcd_pipe_handle_t enum_dflt_pipe_hdl = p_hub_driver_obj->single_thread.enum_dflt_pipe_hdl;
urb_t *enum_urb = p_hub_driver_obj->single_thread.enum_urb;
usb_device_handle_t dev_hdl = p_hub_driver_obj->single_thread.enum_dev_hdl;
enum_stage_t next_stage;
switch (cur_stage) {
case ENUM_STAGE_START:
next_stage = enum_stage_start();
break;
case ENUM_STAGE_GET_SHORT_DEV_DESC:
next_stage = enum_stage_get_short_dev_desc(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_GET_SHORT_DEV_DESC_CHECK:
next_stage = enum_stage_check_short_dev_desc(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_SECOND_RESET:
next_stage = enum_stage_second_reset(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_SET_ADDR:
next_stage = enum_stage_set_addr(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_SET_ADDR_CHECK:
next_stage = enum_stage_check_set_addr(enum_dflt_pipe_hdl, enum_urb, dev_hdl);
break;
case ENUM_STAGE_GET_FULL_DEV_DESC:
next_stage = enum_stage_get_full_dev_desc(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_GET_FULL_DEV_DESC_CHECK:
next_stage = enum_stage_check_full_dev_desc(enum_dflt_pipe_hdl, enum_urb, dev_hdl);
break;
case ENUM_STAGE_GET_CONFIG_DESC:
next_stage = enum_stage_get_config_desc(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_GET_CONFIG_DESC_CHECK:
next_stage = enum_stage_check_config_desc(enum_dflt_pipe_hdl, enum_urb, dev_hdl);
break;
case ENUM_STAGE_SET_CONFIG:
next_stage = enum_stage_set_config(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_SET_CONFIG_CHECK:
next_stage = enum_stage_check_config(enum_dflt_pipe_hdl, enum_urb);
break;
case ENUM_STAGE_CLEANUP:
next_stage = enum_stage_cleanup();
break;
case ENUM_STAGE_CLEANUP_FAILED:
next_stage = enum_stage_cleanup_failed();
break;
default:
//Note: Don't abort here. The enum_dflt_pipe_callback() can trigger a HUB_DRIVER_FLAG_ACTION_ENUM_EVENT after a cleanup
next_stage = ENUM_STAGE_NONE;
break;
}
p_hub_driver_obj->single_thread.enum_stage = next_stage;
HUB_DRIVER_ENTER_CRITICAL();
if (next_stage == ENUM_STAGE_GET_SHORT_DEV_DESC ||
next_stage == ENUM_STAGE_SECOND_RESET ||
next_stage == ENUM_STAGE_SET_ADDR ||
next_stage == ENUM_STAGE_GET_FULL_DEV_DESC ||
next_stage == ENUM_STAGE_GET_CONFIG_DESC ||
next_stage == ENUM_STAGE_SET_CONFIG ||
next_stage == ENUM_STAGE_CLEANUP ||
next_stage == ENUM_STAGE_CLEANUP_FAILED) {
p_hub_driver_obj->dynamic.flags.actions |= HUB_DRIVER_FLAG_ACTION_ENUM_EVENT;
}
HUB_DRIVER_EXIT_CRITICAL();
}
// ---------------------------------------------- Hub Driver Functions -------------------------------------------------
esp_err_t hub_install(hub_config_t *hub_config)
{
HUB_DRIVER_ENTER_CRITICAL();
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj == NULL, ESP_ERR_INVALID_STATE);
HUB_DRIVER_EXIT_CRITICAL();
//Allocate Hub driver object
hub_driver_t *hub_driver_obj = heap_caps_calloc(1, sizeof(hub_driver_t), MALLOC_CAP_DEFAULT);
urb_t *enum_urb = urb_alloc(sizeof(usb_setup_packet_t) + ENUM_CTRL_TRANSFER_MAX_LEN, 0, 0);
if (hub_driver_obj == NULL || enum_urb == NULL) {
return ESP_ERR_NO_MEM;
}
esp_err_t ret;
//Install HCD port
hcd_port_config_t port_config = {
.fifo_bias = HUB_ROOT_HCD_PORT_FIFO_BIAS,
.callback = root_port_callback,
.callback_arg = NULL,
.context = NULL,
};
hcd_port_handle_t port_hdl;
ret = hcd_port_init(HUB_ROOT_PORT_NUM, &port_config, &port_hdl);
if (ret != ESP_OK) {
goto err;
}
//Initialize hub driver object
hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_INSTALLED;
hub_driver_obj->single_thread.enum_stage = ENUM_STAGE_NONE;
hub_driver_obj->single_thread.enum_urb = enum_urb;
hub_driver_obj->constant.root_port_hdl = port_hdl;
hub_driver_obj->constant.notif_cb = hub_config->notif_cb;
hub_driver_obj->constant.notif_cb_arg = hub_config->notif_cb_arg;
HUB_DRIVER_ENTER_CRITICAL();
if (p_hub_driver_obj != NULL) {
HUB_DRIVER_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto assign_err;
}
p_hub_driver_obj = hub_driver_obj;
HUB_DRIVER_EXIT_CRITICAL();
//Indicate to USBH that the hub is installed
ESP_ERROR_CHECK(usbh_hub_is_installed(usbh_hub_callback, NULL));
ret = ESP_OK;
return ret;
assign_err:
ESP_ERROR_CHECK(hcd_port_deinit(port_hdl));
err:
urb_free(enum_urb);
heap_caps_free(hub_driver_obj);
return ret;
}
esp_err_t hub_uninstall(void)
{
HUB_DRIVER_ENTER_CRITICAL();
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj != NULL, ESP_ERR_INVALID_STATE);
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj->dynamic.driver_state == HUB_DRIVER_STATE_INSTALLED, ESP_ERR_INVALID_STATE);
hub_driver_t *hub_driver_obj = p_hub_driver_obj;
p_hub_driver_obj = NULL;
HUB_DRIVER_EXIT_CRITICAL();
ESP_ERROR_CHECK(hcd_port_deinit(hub_driver_obj->constant.root_port_hdl));
//Free Hub driver resources
urb_free(hub_driver_obj->single_thread.enum_urb);
heap_caps_free(hub_driver_obj);
return ESP_OK;
}
esp_err_t hub_root_start(void)
{
HUB_DRIVER_ENTER_CRITICAL();
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj != NULL, ESP_ERR_INVALID_STATE);
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj->dynamic.driver_state == HUB_DRIVER_STATE_INSTALLED, ESP_ERR_INVALID_STATE);
HUB_DRIVER_EXIT_CRITICAL();
//Power ON the root port
esp_err_t ret;
ret = hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_POWER_ON);
if (ret == ESP_OK) {
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_POWERD;
HUB_DRIVER_EXIT_CRITICAL();
}
return ret;
}
esp_err_t hub_root_stop(void)
{
HUB_DRIVER_ENTER_CRITICAL();
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj != NULL, ESP_ERR_INVALID_STATE);
HUB_DRIVER_CHECK_FROM_CRIT(p_hub_driver_obj->dynamic.driver_state != HUB_DRIVER_STATE_INSTALLED, ESP_ERR_INVALID_STATE);
HUB_DRIVER_EXIT_CRITICAL();
esp_err_t ret;
ret = hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_POWER_OFF);
if (ret == ESP_OK) {
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_INSTALLED;
HUB_DRIVER_EXIT_CRITICAL();
}
return ret;
}
esp_err_t hub_process(void)
{
HUB_DRIVER_ENTER_CRITICAL();
uint32_t action_flags = p_hub_driver_obj->dynamic.flags.actions;
p_hub_driver_obj->dynamic.flags.actions = 0;
HUB_DRIVER_EXIT_CRITICAL();
while (action_flags) {
if (action_flags & HUB_DRIVER_FLAG_ACTION_ROOT_EVENT) {
root_port_handle_events(p_hub_driver_obj->constant.root_port_hdl);
}
if (action_flags & HUB_DRIVER_FLAG_ACTION_ENUM_EVENT) {
enum_handle_events();
}
if (action_flags & HUB_DRIVER_FLAG_ACTION_PORT_RECOVER) {
ESP_LOGD(HUB_DRIVER_TAG, "Recovering root port");
ESP_ERROR_CHECK(hcd_port_recover(p_hub_driver_obj->constant.root_port_hdl));
ESP_ERROR_CHECK(hcd_port_command(p_hub_driver_obj->constant.root_port_hdl, HCD_PORT_CMD_POWER_ON));
HUB_DRIVER_ENTER_CRITICAL();
p_hub_driver_obj->dynamic.driver_state = HUB_DRIVER_STATE_ROOT_POWERD;
HUB_DRIVER_EXIT_CRITICAL();
}
HUB_DRIVER_ENTER_CRITICAL();
action_flags = p_hub_driver_obj->dynamic.flags.actions;
p_hub_driver_obj->dynamic.flags.actions = 0;
HUB_DRIVER_EXIT_CRITICAL();
}
return ESP_OK;
}
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