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esp-idf/components/usb/usbh.c
Darian Leung 3887441b37
fix(usb): Fix bug where usbh_process() misses an event 
This commit fixes a bug where if multiple concurrent USBH API calls trigger
multiple events on the same device, some events will be lost. As a result,
those lost events don't get processed by the subsequent usbh_process() call.
2024-02-27 18:22:48 +08:00

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/*
* SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "sdkconfig.h"
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <sys/queue.h>
#include "freertos/FreeRTOS.h"
#include "freertos/portmacro.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_heap_caps.h"
#include "hcd.h"
#include "usbh.h"
#include "usb/usb_helpers.h"
#include "usb/usb_types_ch9.h"
#define EP_NUM_MIN 1 // The smallest possible non-default endpoint number
#define EP_NUM_MAX 16 // The largest possible non-default endpoint number
#define NUM_NON_DEFAULT_EP ((EP_NUM_MAX - 1) * 2) // The total number of non-default endpoints a device can have.
// Device action flags. LISTED IN THE ORDER THEY SHOULD BE HANDLED IN within usbh_process(). Some actions are mutually exclusive
typedef enum {
DEV_ACTION_EPn_HALT_FLUSH = (1 << 0), // Halt all non-default endpoints then flush them (called after a device gone is gone)
DEV_ACTION_EP0_FLUSH = (1 << 1), // Retire all URBS submitted to EP0
DEV_ACTION_EP0_DEQUEUE = (1 << 2), // Dequeue all URBs from EP0
DEV_ACTION_EP0_CLEAR = (1 << 3), // Move EP0 to the the active state
DEV_ACTION_PROP_GONE_EVT = (1 << 4), // Propagate a USBH_EVENT_DEV_GONE event
DEV_ACTION_FREE_AND_RECOVER = (1 << 5), // Free the device object, but send a USBH_HUB_REQ_PORT_RECOVER request afterwards.
DEV_ACTION_FREE = (1 << 6), // Free the device object
DEV_ACTION_PORT_DISABLE = (1 << 7), // Request the hub driver to disable the port of the device
DEV_ACTION_PROP_NEW = (1 << 8), // Propagate a USBH_EVENT_DEV_NEW event
} dev_action_t;
typedef struct device_s device_t;
typedef struct {
struct {
usbh_ep_cb_t ep_cb;
void *ep_cb_arg;
hcd_pipe_handle_t pipe_hdl;
device_t *dev; // Pointer to the device object that this endpoint is contained in
const usb_ep_desc_t *ep_desc; // This just stores a pointer endpoint descriptor inside the device's "config_desc"
} constant;
} endpoint_t;
struct device_s {
// Dynamic members require a critical section
struct {
TAILQ_ENTRY(device_s) tailq_entry;
union {
struct {
uint32_t in_pending_list: 1;
uint32_t is_gone: 1;
uint32_t waiting_close: 1;
uint32_t waiting_port_disable: 1;
uint32_t waiting_free: 1;
uint32_t reserved27: 27;
};
uint32_t val;
} flags;
uint32_t action_flags;
int num_ctrl_xfers_inflight;
usb_device_state_t state;
uint32_t ref_count;
} dynamic;
// Mux protected members must be protected by the USBH mux_lock when accessed
struct {
/*
- Endpoint object pointers for each possible non-default endpoint
- All OUT EPs are listed before IN EPs (i.e., EP_NUM_MIN OUT ... EP_NUM_MAX OUT ... EP_NUM_MIN IN ... EP_NUM_MAX)
*/
endpoint_t *endpoints[NUM_NON_DEFAULT_EP];
} mux_protected;
// Constant members do not change after device allocation and enumeration thus do not require a critical section
struct {
hcd_pipe_handle_t default_pipe;
hcd_port_handle_t port_hdl;
uint8_t address;
usb_speed_t speed;
const usb_device_desc_t *desc;
const usb_config_desc_t *config_desc;
const usb_str_desc_t *str_desc_manu;
const usb_str_desc_t *str_desc_product;
const usb_str_desc_t *str_desc_ser_num;
} constant;
};
typedef struct {
// Dynamic members require a critical section
struct {
TAILQ_HEAD(tailhead_devs, device_s) devs_idle_tailq; // Tailq of all enum and configured devices
TAILQ_HEAD(tailhead_devs_cb, device_s) devs_pending_tailq; // Tailq of devices that need to have their cb called
} dynamic;
// Mux protected members must be protected by the USBH mux_lock when accessed
struct {
uint8_t num_device; // Number of enumerated devices
} mux_protected;
// Constant members do no change after installation thus do not require a critical section
struct {
usb_proc_req_cb_t proc_req_cb;
void *proc_req_cb_arg;
usbh_hub_req_cb_t hub_req_cb;
void *hub_req_cb_arg;
usbh_event_cb_t event_cb;
void *event_cb_arg;
usbh_ctrl_xfer_cb_t ctrl_xfer_cb;
void *ctrl_xfer_cb_arg;
SemaphoreHandle_t mux_lock;
} constant;
} usbh_t;
static usbh_t *p_usbh_obj = NULL;
static portMUX_TYPE usbh_lock = portMUX_INITIALIZER_UNLOCKED;
const char *USBH_TAG = "USBH";
#define USBH_ENTER_CRITICAL_ISR() portENTER_CRITICAL_ISR(&usbh_lock)
#define USBH_EXIT_CRITICAL_ISR() portEXIT_CRITICAL_ISR(&usbh_lock)
#define USBH_ENTER_CRITICAL() portENTER_CRITICAL(&usbh_lock)
#define USBH_EXIT_CRITICAL() portEXIT_CRITICAL(&usbh_lock)
#define USBH_ENTER_CRITICAL_SAFE() portENTER_CRITICAL_SAFE(&usbh_lock)
#define USBH_EXIT_CRITICAL_SAFE() portEXIT_CRITICAL_SAFE(&usbh_lock)
#define USBH_CHECK(cond, ret_val) ({ \
if (!(cond)) { \
return (ret_val); \
} \
})
#define USBH_CHECK_FROM_CRIT(cond, ret_val) ({ \
if (!(cond)) { \
USBH_EXIT_CRITICAL(); \
return ret_val; \
} \
})
// ------------------------------------------------- Forward Declare ---------------------------------------------------
static bool ep0_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr);
static bool epN_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr);
static bool _dev_set_actions(device_t *dev_obj, uint32_t action_flags);
// ----------------------------------------------------- Helpers -------------------------------------------------------
static inline bool check_ep_addr(uint8_t bEndpointAddress)
{
/*
Check that the bEndpointAddress is valid
- Must be <= EP_NUM_MAX (e.g., 16)
- Must be >= EP_NUM_MIN (e.g., 1).
- EP0 is the owned/managed by USBH, thus must never by directly addressed by users (see USB 2.0 section 10.5.1.2)
*/
uint8_t addr = bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK;
return (addr >= EP_NUM_MIN) && (addr <= EP_NUM_MAX);
}
static endpoint_t *get_ep_from_addr(device_t *dev_obj, uint8_t bEndpointAddress)
{
/*
CALLER IS RESPONSIBLE FOR TAKING THE mux_lock
*/
// Calculate index to the device's endpoint object list
int index;
// EP_NUM_MIN should map to an index of 0
index = (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK) - EP_NUM_MIN;
assert(index >= 0); // Endpoint address is not supported
if (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_DIR_MASK) {
// OUT EPs are listed before IN EPs, so add an offset
index += (EP_NUM_MAX - EP_NUM_MIN);
}
return dev_obj->mux_protected.endpoints[index];
}
static inline void set_ep_from_addr(device_t *dev_obj, uint8_t bEndpointAddress, endpoint_t *ep_obj)
{
/*
CALLER IS RESPONSIBLE FOR TAKING THE mux_lock
*/
// Calculate index to the device's endpoint object list
int index;
// EP_NUM_MIN should map to an index of 0
index = (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK) - EP_NUM_MIN;
assert(index >= 0); // Endpoint address is not supported
if (bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_DIR_MASK) {
// OUT EPs are listed before IN EPs, so add an offset
index += (EP_NUM_MAX - EP_NUM_MIN);
}
dev_obj->mux_protected.endpoints[index] = ep_obj;
}
static bool urb_check_args(urb_t *urb)
{
if (urb->transfer.callback == NULL) {
ESP_LOGE(USBH_TAG, "usb_transfer_t callback is NULL");
return false;
}
if (urb->transfer.num_bytes > urb->transfer.data_buffer_size) {
ESP_LOGE(USBH_TAG, "usb_transfer_t num_bytes > data_buffer_size");
return false;
}
return true;
}
static bool transfer_check_usb_compliance(usb_transfer_t *transfer, usb_transfer_type_t type, int mps, bool is_in)
{
if (type == USB_TRANSFER_TYPE_CTRL) {
// Check that num_bytes and wLength are set correctly
usb_setup_packet_t *setup_pkt = (usb_setup_packet_t *)transfer->data_buffer;
if (transfer->num_bytes != sizeof(usb_setup_packet_t) + setup_pkt->wLength) {
ESP_LOGE(USBH_TAG, "usb_transfer_t num_bytes and usb_setup_packet_t wLength mismatch");
return false;
}
} else if (type == USB_TRANSFER_TYPE_ISOCHRONOUS) {
// Check that there is at least one isochronous packet descriptor
if (transfer->num_isoc_packets <= 0) {
ESP_LOGE(USBH_TAG, "usb_transfer_t num_isoc_packets is 0");
return false;
}
// Check that sum of all packet lengths add up to transfer length
// If IN, check that each packet length is integer multiple of MPS
int total_num_bytes = 0;
bool mod_mps_all_zero = true;
for (int i = 0; i < transfer->num_isoc_packets; i++) {
total_num_bytes += transfer->isoc_packet_desc[i].num_bytes;
if (transfer->isoc_packet_desc[i].num_bytes % mps != 0) {
mod_mps_all_zero = false;
}
}
if (transfer->num_bytes != total_num_bytes) {
ESP_LOGE(USBH_TAG, "ISOC transfer num_bytes != num_bytes of all packets");
return false;
}
if (is_in && !mod_mps_all_zero) {
ESP_LOGE(USBH_TAG, "ISOC IN num_bytes not integer multiple of MPS");
return false;
}
} else {
// Check that IN transfers are integer multiple of MPS
if (is_in && (transfer->num_bytes % mps != 0)) {
ESP_LOGE(USBH_TAG, "IN transfer num_bytes not integer multiple of MPS");
return false;
}
}
return true;
}
// --------------------------------------------------- Allocation ------------------------------------------------------
static esp_err_t endpoint_alloc(device_t *dev_obj, const usb_ep_desc_t *ep_desc, usbh_ep_config_t *ep_config, endpoint_t **ep_obj_ret)
{
esp_err_t ret;
endpoint_t *ep_obj;
hcd_pipe_handle_t pipe_hdl;
ep_obj = heap_caps_calloc(1, sizeof(endpoint_t), MALLOC_CAP_DEFAULT);
if (ep_obj == NULL) {
return ESP_ERR_NO_MEM;
}
// Allocate the EP's underlying pipe
hcd_pipe_config_t pipe_config = {
.callback = epN_pipe_callback,
.callback_arg = (void *)ep_obj,
.context = ep_config->context,
.ep_desc = ep_desc,
.dev_speed = dev_obj->constant.speed,
.dev_addr = dev_obj->constant.address,
};
ret = hcd_pipe_alloc(dev_obj->constant.port_hdl, &pipe_config, &pipe_hdl);
if (ret != ESP_OK) {
goto pipe_err;
}
// Initialize the endpoint object
ep_obj->constant.pipe_hdl = pipe_hdl;
ep_obj->constant.ep_cb = ep_config->ep_cb;
ep_obj->constant.ep_cb_arg = ep_config->ep_cb_arg;
ep_obj->constant.dev = dev_obj;
ep_obj->constant.ep_desc = ep_desc;
// Return the endpoint object
*ep_obj_ret = ep_obj;
ret = ESP_OK;
return ret;
pipe_err:
heap_caps_free(ep_obj);
return ret;
}
static void endpoint_free(endpoint_t *ep_obj)
{
if (ep_obj == NULL) {
return;
}
// Deallocate the EP's underlying pipe
ESP_ERROR_CHECK(hcd_pipe_free(ep_obj->constant.pipe_hdl));
// Free the heap object
heap_caps_free(ep_obj);
}
static esp_err_t device_alloc(hcd_port_handle_t port_hdl, usb_speed_t speed, device_t **dev_obj_ret)
{
esp_err_t ret;
device_t *dev_obj = heap_caps_calloc(1, sizeof(device_t), MALLOC_CAP_DEFAULT);
usb_device_desc_t *dev_desc = heap_caps_calloc(1, sizeof(usb_device_desc_t), MALLOC_CAP_DEFAULT);
if (dev_obj == NULL || dev_desc == NULL) {
ret = ESP_ERR_NO_MEM;
goto err;
}
// Allocate a pipe for EP0. We set the pipe callback to NULL for now
hcd_pipe_config_t pipe_config = {
.callback = NULL,
.callback_arg = NULL,
.context = (void *)dev_obj,
.ep_desc = NULL, // No endpoint descriptor means we're allocating a pipe for EP0
.dev_speed = speed,
.dev_addr = 0,
};
hcd_pipe_handle_t default_pipe_hdl;
ret = hcd_pipe_alloc(port_hdl, &pipe_config, &default_pipe_hdl);
if (ret != ESP_OK) {
goto err;
}
// Initialize device object
dev_obj->dynamic.state = USB_DEVICE_STATE_DEFAULT;
dev_obj->constant.default_pipe = default_pipe_hdl;
dev_obj->constant.port_hdl = port_hdl;
// Note: dev_obj->constant.address is assigned later during enumeration
dev_obj->constant.speed = speed;
dev_obj->constant.desc = dev_desc;
*dev_obj_ret = dev_obj;
ret = ESP_OK;
return ret;
err:
heap_caps_free(dev_desc);
heap_caps_free(dev_obj);
return ret;
}
static void device_free(device_t *dev_obj)
{
if (dev_obj == NULL) {
return;
}
// Configuration might not have been allocated (in case of early enumeration failure)
if (dev_obj->constant.config_desc) {
heap_caps_free((usb_config_desc_t *)dev_obj->constant.config_desc);
}
// String descriptors might not have been allocated (in case of early enumeration failure)
if (dev_obj->constant.str_desc_manu) {
heap_caps_free((usb_str_desc_t *)dev_obj->constant.str_desc_manu);
}
if (dev_obj->constant.str_desc_product) {
heap_caps_free((usb_str_desc_t *)dev_obj->constant.str_desc_product);
}
if (dev_obj->constant.str_desc_ser_num) {
heap_caps_free((usb_str_desc_t *)dev_obj->constant.str_desc_ser_num);
}
heap_caps_free((usb_device_desc_t *)dev_obj->constant.desc);
ESP_ERROR_CHECK(hcd_pipe_free(dev_obj->constant.default_pipe));
heap_caps_free(dev_obj);
}
// ---------------------------------------------------- Callbacks ------------------------------------------------------
static bool ep0_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr)
{
uint32_t action_flags;
device_t *dev_obj = (device_t *)user_arg;
switch (pipe_event) {
case HCD_PIPE_EVENT_URB_DONE:
// A control transfer completed on EP0's pipe . We need to dequeue it
action_flags = DEV_ACTION_EP0_DEQUEUE;
break;
case HCD_PIPE_EVENT_ERROR_XFER:
case HCD_PIPE_EVENT_ERROR_URB_NOT_AVAIL:
case HCD_PIPE_EVENT_ERROR_OVERFLOW:
// EP0's pipe has encountered an error. We need to retire all URBs, dequeue them, then make the pipe active again
action_flags = DEV_ACTION_EP0_FLUSH |
DEV_ACTION_EP0_DEQUEUE |
DEV_ACTION_EP0_CLEAR;
if (in_isr) {
ESP_EARLY_LOGE(USBH_TAG, "Dev %d EP 0 Error", dev_obj->constant.address);
} else {
ESP_LOGE(USBH_TAG, "Dev %d EP 0 Error", dev_obj->constant.address);
}
break;
case HCD_PIPE_EVENT_ERROR_STALL:
// EP0's pipe encountered a "protocol stall". We just need to dequeue URBs then make the pipe active again
action_flags = DEV_ACTION_EP0_DEQUEUE | DEV_ACTION_EP0_CLEAR;
if (in_isr) {
ESP_EARLY_LOGE(USBH_TAG, "Dev %d EP 0 STALL", dev_obj->constant.address);
} else {
ESP_LOGE(USBH_TAG, "Dev %d EP 0 STALL", dev_obj->constant.address);
}
break;
default:
action_flags = 0;
break;
}
USBH_ENTER_CRITICAL_SAFE();
bool call_proc_req_cb = _dev_set_actions(dev_obj, action_flags);
USBH_EXIT_CRITICAL_SAFE();
bool yield = false;
if (call_proc_req_cb) {
yield = p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, in_isr, p_usbh_obj->constant.proc_req_cb_arg);
}
return yield;
}
static bool epN_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t pipe_event, void *user_arg, bool in_isr)
{
endpoint_t *ep_obj = (endpoint_t *)user_arg;
return ep_obj->constant.ep_cb((usbh_ep_handle_t)ep_obj,
(usbh_ep_event_t)pipe_event,
ep_obj->constant.ep_cb_arg,
in_isr);
}
// -------------------------------------------------- Event Related ----------------------------------------------------
static bool _dev_set_actions(device_t *dev_obj, uint32_t action_flags)
{
if (action_flags == 0) {
return false;
}
bool call_proc_req_cb;
// Check if device is already on the callback list
if (!dev_obj->dynamic.flags.in_pending_list) {
// Move device form idle device list to callback device list
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
TAILQ_INSERT_TAIL(&p_usbh_obj->dynamic.devs_pending_tailq, dev_obj, dynamic.tailq_entry);
dev_obj->dynamic.action_flags |= action_flags;
dev_obj->dynamic.flags.in_pending_list = 1;
call_proc_req_cb = true;
} else {
// The device is already on the callback list, thus a processing request is already pending.
dev_obj->dynamic.action_flags |= action_flags;
call_proc_req_cb = false;
}
return call_proc_req_cb;
}
static inline void handle_epn_halt_flush(device_t *dev_obj)
{
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
// Halt then flush all non-default EPs
for (int i = 0; i < NUM_NON_DEFAULT_EP; i++) {
if (dev_obj->mux_protected.endpoints[i] != NULL) {
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.endpoints[i]->constant.pipe_hdl, HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.endpoints[i]->constant.pipe_hdl, HCD_PIPE_CMD_FLUSH));
}
}
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
}
static inline void handle_ep0_flush(device_t *dev_obj)
{
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_FLUSH));
}
static inline void handle_ep0_dequeue(device_t *dev_obj)
{
// Empty URBs from EP0's pipe and call the control transfer callback
ESP_LOGD(USBH_TAG, "Default pipe device %d", dev_obj->constant.address);
int num_urbs = 0;
urb_t *urb = hcd_urb_dequeue(dev_obj->constant.default_pipe);
while (urb != NULL) {
num_urbs++;
p_usbh_obj->constant.ctrl_xfer_cb((usb_device_handle_t)dev_obj, urb, p_usbh_obj->constant.ctrl_xfer_cb_arg);
urb = hcd_urb_dequeue(dev_obj->constant.default_pipe);
}
USBH_ENTER_CRITICAL();
dev_obj->dynamic.num_ctrl_xfers_inflight -= num_urbs;
USBH_EXIT_CRITICAL();
}
static inline void handle_ep0_clear(device_t *dev_obj)
{
// We allow the pipe command to fail just in case the pipe becomes invalid mid command
hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_CLEAR);
}
static inline void handle_prop_gone_evt(device_t *dev_obj)
{
// Flush EP0's pipe. Then propagate a USBH_EVENT_DEV_GONE event
ESP_LOGE(USBH_TAG, "Device %d gone", dev_obj->constant.address);
p_usbh_obj->constant.event_cb((usb_device_handle_t)dev_obj, USBH_EVENT_DEV_GONE, p_usbh_obj->constant.event_cb_arg);
}
static void handle_free_and_recover(device_t *dev_obj, bool recover_port)
{
// Cache a copy of the port handle as we are about to free the device object
bool all_free;
hcd_port_handle_t port_hdl = dev_obj->constant.port_hdl;
ESP_LOGD(USBH_TAG, "Freeing device %d", dev_obj->constant.address);
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
USBH_ENTER_CRITICAL();
// Remove the device object for it's containing list
if (dev_obj->dynamic.flags.in_pending_list) {
dev_obj->dynamic.flags.in_pending_list = 0;
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_pending_tailq, dev_obj, dynamic.tailq_entry);
} else {
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
}
USBH_EXIT_CRITICAL();
p_usbh_obj->mux_protected.num_device--;
all_free = (p_usbh_obj->mux_protected.num_device == 0);
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
device_free(dev_obj);
// If all devices have been freed, propagate a USBH_EVENT_DEV_ALL_FREE event
if (all_free) {
ESP_LOGD(USBH_TAG, "Device all free");
p_usbh_obj->constant.event_cb((usb_device_handle_t)NULL, USBH_EVENT_DEV_ALL_FREE, p_usbh_obj->constant.event_cb_arg);
}
// Check if we need to recover the device's port
if (recover_port) {
p_usbh_obj->constant.hub_req_cb(port_hdl, USBH_HUB_REQ_PORT_RECOVER, p_usbh_obj->constant.hub_req_cb_arg);
}
}
static inline void handle_port_disable(device_t *dev_obj)
{
// Request that the HUB disables this device's port
ESP_LOGD(USBH_TAG, "Disable device port %d", dev_obj->constant.address);
p_usbh_obj->constant.hub_req_cb(dev_obj->constant.port_hdl, USBH_HUB_REQ_PORT_DISABLE, p_usbh_obj->constant.hub_req_cb_arg);
}
static inline void handle_prop_new_evt(device_t *dev_obj)
{
ESP_LOGD(USBH_TAG, "New device %d", dev_obj->constant.address);
p_usbh_obj->constant.event_cb((usb_device_handle_t)dev_obj, USBH_EVENT_DEV_NEW, p_usbh_obj->constant.event_cb_arg);
}
// ------------------------------------------------- USBH Functions ----------------------------------------------------
esp_err_t usbh_install(const usbh_config_t *usbh_config)
{
USBH_CHECK(usbh_config != NULL, ESP_ERR_INVALID_ARG);
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(p_usbh_obj == NULL, ESP_ERR_INVALID_STATE);
USBH_EXIT_CRITICAL();
esp_err_t ret;
usbh_t *usbh_obj = heap_caps_calloc(1, sizeof(usbh_t), MALLOC_CAP_DEFAULT);
SemaphoreHandle_t mux_lock = xSemaphoreCreateMutex();
if (usbh_obj == NULL || mux_lock == NULL) {
ret = ESP_ERR_NO_MEM;
goto err;
}
// Initialize USBH object
TAILQ_INIT(&usbh_obj->dynamic.devs_idle_tailq);
TAILQ_INIT(&usbh_obj->dynamic.devs_pending_tailq);
usbh_obj->constant.proc_req_cb = usbh_config->proc_req_cb;
usbh_obj->constant.proc_req_cb_arg = usbh_config->proc_req_cb_arg;
usbh_obj->constant.event_cb = usbh_config->event_cb;
usbh_obj->constant.event_cb_arg = usbh_config->event_cb_arg;
usbh_obj->constant.ctrl_xfer_cb = usbh_config->ctrl_xfer_cb;
usbh_obj->constant.ctrl_xfer_cb_arg = usbh_config->ctrl_xfer_cb_arg;
usbh_obj->constant.mux_lock = mux_lock;
// Assign USBH object pointer
USBH_ENTER_CRITICAL();
if (p_usbh_obj != NULL) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto err;
}
p_usbh_obj = usbh_obj;
USBH_EXIT_CRITICAL();
ret = ESP_OK;
return ret;
err:
if (mux_lock != NULL) {
vSemaphoreDelete(mux_lock);
}
heap_caps_free(usbh_obj);
return ret;
}
esp_err_t usbh_uninstall(void)
{
// Check that USBH is in a state to be uninstalled
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(p_usbh_obj != NULL, ESP_ERR_INVALID_STATE);
usbh_t *usbh_obj = p_usbh_obj;
USBH_EXIT_CRITICAL();
esp_err_t ret;
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(usbh_obj->constant.mux_lock, portMAX_DELAY);
if (p_usbh_obj->mux_protected.num_device > 0) {
// There are still devices allocated. Can't uninstall right now.
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// Check again if we can uninstall
USBH_ENTER_CRITICAL();
assert(p_usbh_obj == usbh_obj);
p_usbh_obj = NULL;
USBH_EXIT_CRITICAL();
xSemaphoreGive(usbh_obj->constant.mux_lock);
// Free resources
vSemaphoreDelete(usbh_obj->constant.mux_lock);
heap_caps_free(usbh_obj);
ret = ESP_OK;
return ret;
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_process(void)
{
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(p_usbh_obj != NULL, ESP_ERR_INVALID_STATE);
// Keep processing until all device's with pending events have been handled
while (!TAILQ_EMPTY(&p_usbh_obj->dynamic.devs_pending_tailq)) {
// Move the device back into the idle device list,
device_t *dev_obj = TAILQ_FIRST(&p_usbh_obj->dynamic.devs_pending_tailq);
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_pending_tailq, dev_obj, dynamic.tailq_entry);
TAILQ_INSERT_TAIL(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
// Clear the device's flags
uint32_t action_flags = dev_obj->dynamic.action_flags;
dev_obj->dynamic.action_flags = 0;
dev_obj->dynamic.flags.in_pending_list = 0;
/* ---------------------------------------------------------------------
Exit critical section to handle device action flags in their listed order
--------------------------------------------------------------------- */
USBH_EXIT_CRITICAL();
ESP_LOGD(USBH_TAG, "Processing actions 0x%"PRIx32"", action_flags);
// Sanity check. If the device is being freed, there must not be any other action flags set
assert(!(action_flags & DEV_ACTION_FREE) || action_flags == DEV_ACTION_FREE);
if (action_flags & DEV_ACTION_EPn_HALT_FLUSH) {
handle_epn_halt_flush(dev_obj);
}
if (action_flags & DEV_ACTION_EP0_FLUSH) {
handle_ep0_flush(dev_obj);
}
if (action_flags & DEV_ACTION_EP0_DEQUEUE) {
handle_ep0_dequeue(dev_obj);
}
if (action_flags & DEV_ACTION_EP0_CLEAR) {
handle_ep0_clear(dev_obj);
}
if (action_flags & DEV_ACTION_PROP_GONE_EVT) {
handle_prop_gone_evt(dev_obj);
}
/*
Note: We make these action flags mutually exclusive in case they happen in rapid succession. They are handled
in the order of precedence
For example
- New device event is requested followed immediately by a disconnection
- Port disable requested followed immediately by a disconnection
*/
if (action_flags & DEV_ACTION_FREE_AND_RECOVER) {
handle_free_and_recover(dev_obj, true);
} else if (action_flags & DEV_ACTION_FREE) {
handle_free_and_recover(dev_obj, false);
} else if (action_flags & DEV_ACTION_PORT_DISABLE) {
handle_port_disable(dev_obj);
} else if (action_flags & DEV_ACTION_PROP_NEW) {
handle_prop_new_evt(dev_obj);
}
USBH_ENTER_CRITICAL();
/* ---------------------------------------------------------------------
Re-enter critical sections. All device action flags should have been handled.
--------------------------------------------------------------------- */
}
USBH_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t usbh_num_devs(int *num_devs_ret)
{
USBH_CHECK(num_devs_ret != NULL, ESP_ERR_INVALID_ARG);
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
*num_devs_ret = p_usbh_obj->mux_protected.num_device;
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ESP_OK;
}
// ------------------------------------------------ Device Functions ---------------------------------------------------
// --------------------- Device Pool -----------------------
esp_err_t usbh_dev_addr_list_fill(int list_len, uint8_t *dev_addr_list, int *num_dev_ret)
{
USBH_CHECK(dev_addr_list != NULL && num_dev_ret != NULL, ESP_ERR_INVALID_ARG);
USBH_ENTER_CRITICAL();
int num_filled = 0;
device_t *dev_obj;
// Fill list with devices from idle tailq
TAILQ_FOREACH(dev_obj, &p_usbh_obj->dynamic.devs_idle_tailq, dynamic.tailq_entry) {
if (num_filled < list_len) {
dev_addr_list[num_filled] = dev_obj->constant.address;
num_filled++;
} else {
break;
}
}
// Fill list with devices from pending tailq
TAILQ_FOREACH(dev_obj, &p_usbh_obj->dynamic.devs_pending_tailq, dynamic.tailq_entry) {
if (num_filled < list_len) {
dev_addr_list[num_filled] = dev_obj->constant.address;
num_filled++;
} else {
break;
}
}
USBH_EXIT_CRITICAL();
// Write back number of devices filled
*num_dev_ret = num_filled;
return ESP_OK;
}
esp_err_t usbh_dev_open(uint8_t dev_addr, usb_device_handle_t *dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
USBH_ENTER_CRITICAL();
// Go through the device lists to find the device with the specified address
device_t *found_dev_obj = NULL;
device_t *dev_obj;
TAILQ_FOREACH(dev_obj, &p_usbh_obj->dynamic.devs_idle_tailq, dynamic.tailq_entry) {
if (dev_obj->constant.address == dev_addr) {
found_dev_obj = dev_obj;
goto exit;
}
}
TAILQ_FOREACH(dev_obj, &p_usbh_obj->dynamic.devs_pending_tailq, dynamic.tailq_entry) {
if (dev_obj->constant.address == dev_addr) {
found_dev_obj = dev_obj;
goto exit;
}
}
exit:
if (found_dev_obj != NULL) {
// The device is not in a state to be referenced
if (dev_obj->dynamic.flags.is_gone || dev_obj->dynamic.flags.waiting_port_disable || dev_obj->dynamic.flags.waiting_free) {
ret = ESP_ERR_INVALID_STATE;
} else {
dev_obj->dynamic.ref_count++;
*dev_hdl = (usb_device_handle_t)found_dev_obj;
ret = ESP_OK;
}
} else {
ret = ESP_ERR_NOT_FOUND;
}
USBH_EXIT_CRITICAL();
return ret;
}
esp_err_t usbh_dev_close(usb_device_handle_t dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
dev_obj->dynamic.ref_count--;
bool call_proc_req_cb = false;
if (dev_obj->dynamic.ref_count == 0) {
// Sanity check.
assert(dev_obj->dynamic.num_ctrl_xfers_inflight == 0); // There cannot be any control transfer in-flight
assert(!dev_obj->dynamic.flags.waiting_free); // This can only be set when ref count reaches 0
if (dev_obj->dynamic.flags.is_gone) {
// Device is already gone so it's port is already disabled. Trigger the USBH process to free the device
dev_obj->dynamic.flags.waiting_free = 1;
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_FREE_AND_RECOVER); // Port error occurred so we need to recover it
} else if (dev_obj->dynamic.flags.waiting_close) {
// Device is still connected but is no longer needed. Trigger the USBH process to request device's port be disabled
dev_obj->dynamic.flags.waiting_port_disable = 1;
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_PORT_DISABLE);
}
// Else, there's nothing to do. Leave the device allocated
}
USBH_EXIT_CRITICAL();
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return ESP_OK;
}
esp_err_t usbh_dev_mark_all_free(void)
{
USBH_ENTER_CRITICAL();
/*
Go through the device list and mark each device as waiting to be closed. If the device is not opened at all, we can
disable it immediately.
Note: We manually traverse the list because we need to add/remove items while traversing
*/
bool call_proc_req_cb = false;
bool wait_for_free = false;
for (int i = 0; i < 2; i++) {
device_t *dev_obj_cur;
device_t *dev_obj_next;
// Go through pending list first as it's more efficient
if (i == 0) {
dev_obj_cur = TAILQ_FIRST(&p_usbh_obj->dynamic.devs_pending_tailq);
} else {
dev_obj_cur = TAILQ_FIRST(&p_usbh_obj->dynamic.devs_idle_tailq);
}
while (dev_obj_cur != NULL) {
assert(!dev_obj_cur->dynamic.flags.waiting_close); // Sanity check
// Keep a copy of the next item first in case we remove the current item
dev_obj_next = TAILQ_NEXT(dev_obj_cur, dynamic.tailq_entry);
if (dev_obj_cur->dynamic.ref_count == 0 && !dev_obj_cur->dynamic.flags.is_gone) {
// Device is not opened as is not gone, so we can disable it now
dev_obj_cur->dynamic.flags.waiting_port_disable = 1;
call_proc_req_cb |= _dev_set_actions(dev_obj_cur, DEV_ACTION_PORT_DISABLE);
} else {
// Device is still opened. Just mark it as waiting to be closed
dev_obj_cur->dynamic.flags.waiting_close = 1;
}
wait_for_free = true; // As long as there is still a device, we need to wait for an event indicating it is freed
dev_obj_cur = dev_obj_next;
}
}
USBH_EXIT_CRITICAL();
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return (wait_for_free) ? ESP_ERR_NOT_FINISHED : ESP_OK;
}
// ------------------- Single Device ----------------------
esp_err_t usbh_dev_get_addr(usb_device_handle_t dev_hdl, uint8_t *dev_addr)
{
USBH_CHECK(dev_hdl != NULL && dev_addr != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(dev_obj->constant.address > 0, ESP_ERR_INVALID_STATE);
*dev_addr = dev_obj->constant.address;
USBH_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t usbh_dev_get_info(usb_device_handle_t dev_hdl, usb_device_info_t *dev_info)
{
USBH_CHECK(dev_hdl != NULL && dev_info != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
esp_err_t ret;
// Device must be configured, or not attached (if it suddenly disconnected)
USBH_ENTER_CRITICAL();
if (!(dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED || dev_obj->dynamic.state == USB_DEVICE_STATE_NOT_ATTACHED)) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// Critical section for the dynamic members
dev_info->speed = dev_obj->constant.speed;
dev_info->dev_addr = dev_obj->constant.address;
dev_info->bMaxPacketSize0 = dev_obj->constant.desc->bMaxPacketSize0;
USBH_EXIT_CRITICAL();
assert(dev_obj->constant.config_desc);
dev_info->bConfigurationValue = dev_obj->constant.config_desc->bConfigurationValue;
// String descriptors are allowed to be NULL as not all devices support them
dev_info->str_desc_manufacturer = dev_obj->constant.str_desc_manu;
dev_info->str_desc_product = dev_obj->constant.str_desc_product;
dev_info->str_desc_serial_num = dev_obj->constant.str_desc_ser_num;
ret = ESP_OK;
exit:
return ret;
}
esp_err_t usbh_dev_get_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t **dev_desc_ret)
{
USBH_CHECK(dev_hdl != NULL && dev_desc_ret != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED, ESP_ERR_INVALID_STATE);
USBH_EXIT_CRITICAL();
*dev_desc_ret = dev_obj->constant.desc;
return ESP_OK;
}
esp_err_t usbh_dev_get_config_desc(usb_device_handle_t dev_hdl, const usb_config_desc_t **config_desc_ret)
{
USBH_CHECK(dev_hdl != NULL && config_desc_ret != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
esp_err_t ret;
// Device must be in the configured state
USBH_ENTER_CRITICAL();
if (dev_obj->dynamic.state != USB_DEVICE_STATE_CONFIGURED) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
USBH_EXIT_CRITICAL();
assert(dev_obj->constant.config_desc);
*config_desc_ret = dev_obj->constant.config_desc;
ret = ESP_OK;
exit:
return ret;
}
esp_err_t usbh_dev_submit_ctrl_urb(usb_device_handle_t dev_hdl, urb_t *urb)
{
USBH_CHECK(dev_hdl != NULL && urb != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_CHECK(urb_check_args(urb), ESP_ERR_INVALID_ARG);
bool xfer_is_in = ((usb_setup_packet_t *)urb->transfer.data_buffer)->bmRequestType & USB_BM_REQUEST_TYPE_DIR_IN;
USBH_CHECK(transfer_check_usb_compliance(&(urb->transfer), USB_TRANSFER_TYPE_CTRL, dev_obj->constant.desc->bMaxPacketSize0, xfer_is_in), ESP_ERR_INVALID_ARG);
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED, ESP_ERR_INVALID_STATE);
// Increment the control transfer count first
dev_obj->dynamic.num_ctrl_xfers_inflight++;
USBH_EXIT_CRITICAL();
esp_err_t ret;
if (hcd_pipe_get_state(dev_obj->constant.default_pipe) != HCD_PIPE_STATE_ACTIVE) {
ret = ESP_ERR_INVALID_STATE;
goto hcd_err;
}
ret = hcd_urb_enqueue(dev_obj->constant.default_pipe, urb);
if (ret != ESP_OK) {
goto hcd_err;
}
ret = ESP_OK;
return ret;
hcd_err:
USBH_ENTER_CRITICAL();
dev_obj->dynamic.num_ctrl_xfers_inflight--;
USBH_EXIT_CRITICAL();
return ret;
}
// ----------------------------------------------- Interface Functions -------------------------------------------------
esp_err_t usbh_ep_alloc(usb_device_handle_t dev_hdl, usbh_ep_config_t *ep_config, usbh_ep_handle_t *ep_hdl_ret)
{
USBH_CHECK(dev_hdl != NULL && ep_config != NULL && ep_hdl_ret != NULL, ESP_ERR_INVALID_ARG);
uint8_t bEndpointAddress = ep_config->bEndpointAddress;
USBH_CHECK(check_ep_addr(bEndpointAddress), ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
endpoint_t *ep_obj;
// Find the endpoint descriptor from the device's current configuration descriptor
const usb_ep_desc_t *ep_desc = usb_parse_endpoint_descriptor_by_address(dev_obj->constant.config_desc, ep_config->bInterfaceNumber, ep_config->bAlternateSetting, ep_config->bEndpointAddress, NULL);
if (ep_desc == NULL) {
return ESP_ERR_NOT_FOUND;
}
// Allocate the endpoint object
ret = endpoint_alloc(dev_obj, ep_desc, ep_config, &ep_obj);
if (ret != ESP_OK) {
goto alloc_err;
}
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
USBH_ENTER_CRITICAL();
// Check the device's state before we assign the a pipe to the allocated endpoint
if (dev_obj->dynamic.state != USB_DEVICE_STATE_CONFIGURED) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto dev_state_err;
}
USBH_EXIT_CRITICAL();
// Check if the endpoint has already been allocated
if (get_ep_from_addr(dev_obj, bEndpointAddress) == NULL) {
set_ep_from_addr(dev_obj, bEndpointAddress, ep_obj);
// Write back the endpoint handle
*ep_hdl_ret = (usbh_ep_handle_t)ep_obj;
ret = ESP_OK;
} else {
// Endpoint is already allocated
ret = ESP_ERR_INVALID_STATE;
}
dev_state_err:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
// If the endpoint was not assigned, free it
if (ret != ESP_OK) {
endpoint_free(ep_obj);
}
alloc_err:
return ret;
}
esp_err_t usbh_ep_free(usbh_ep_handle_t ep_hdl)
{
USBH_CHECK(ep_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
device_t *dev_obj = (device_t *)ep_obj->constant.dev;
uint8_t bEndpointAddress = ep_obj->constant.ep_desc->bEndpointAddress;
// Todo: Check that the EP's underlying pipe is halted before allowing the EP to be freed (IDF-7273)
// Check that the the EP's underlying pipe has no more in-flight URBs
if (hcd_pipe_get_num_urbs(ep_obj->constant.pipe_hdl) != 0) {
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
// Check if the endpoint was allocated on this device
if (ep_obj == get_ep_from_addr(dev_obj, bEndpointAddress)) {
// Clear the endpoint from the device's endpoint object list
set_ep_from_addr(dev_obj, bEndpointAddress, NULL);
ret = ESP_OK;
} else {
ret = ESP_ERR_NOT_FOUND;
}
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
// Finally, we free the endpoint object
if (ret == ESP_OK) {
endpoint_free(ep_obj);
}
exit:
return ret;
}
esp_err_t usbh_ep_get_handle(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress, usbh_ep_handle_t *ep_hdl_ret)
{
USBH_CHECK(dev_hdl != NULL && ep_hdl_ret != NULL, ESP_ERR_INVALID_ARG);
USBH_CHECK(check_ep_addr(bEndpointAddress), ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
endpoint_t *ep_obj;
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
ep_obj = get_ep_from_addr(dev_obj, bEndpointAddress);
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
if (ep_obj) {
*ep_hdl_ret = (usbh_ep_handle_t)ep_obj;
ret = ESP_OK;
} else {
ret = ESP_ERR_NOT_FOUND;
}
return ret;
}
esp_err_t usbh_ep_enqueue_urb(usbh_ep_handle_t ep_hdl, urb_t *urb)
{
USBH_CHECK(ep_hdl != NULL && urb != NULL, ESP_ERR_INVALID_ARG);
USBH_CHECK(urb_check_args(urb), ESP_ERR_INVALID_ARG);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
USBH_CHECK(transfer_check_usb_compliance(&(urb->transfer),
USB_EP_DESC_GET_XFERTYPE(ep_obj->constant.ep_desc),
USB_EP_DESC_GET_MPS(ep_obj->constant.ep_desc),
USB_EP_DESC_GET_EP_DIR(ep_obj->constant.ep_desc)),
ESP_ERR_INVALID_ARG);
// Check that the EP's underlying pipe is in the active state before submitting the URB
if (hcd_pipe_get_state(ep_obj->constant.pipe_hdl) != HCD_PIPE_STATE_ACTIVE) {
return ESP_ERR_INVALID_STATE;
}
// Enqueue the URB to the EP's underlying pipe
return hcd_urb_enqueue(ep_obj->constant.pipe_hdl, urb);
}
esp_err_t usbh_ep_dequeue_urb(usbh_ep_handle_t ep_hdl, urb_t **urb_ret)
{
USBH_CHECK(ep_hdl != NULL && urb_ret != NULL, ESP_ERR_INVALID_ARG);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
// Enqueue the URB to the EP's underlying pipe
*urb_ret = hcd_urb_dequeue(ep_obj->constant.pipe_hdl);
return ESP_OK;
}
esp_err_t usbh_ep_command(usbh_ep_handle_t ep_hdl, usbh_ep_cmd_t command)
{
USBH_CHECK(ep_hdl != NULL, ESP_ERR_INVALID_ARG);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
// Send the command to the EP's underlying pipe
return hcd_pipe_command(ep_obj->constant.pipe_hdl, (hcd_pipe_cmd_t)command);
}
void *usbh_ep_get_context(usbh_ep_handle_t ep_hdl)
{
assert(ep_hdl);
endpoint_t *ep_obj = (endpoint_t *)ep_hdl;
return hcd_pipe_get_context(ep_obj->constant.pipe_hdl);
}
// -------------------------------------------------- Hub Functions ----------------------------------------------------
// ------------------- Device Related ----------------------
esp_err_t usbh_hub_is_installed(usbh_hub_req_cb_t hub_req_callback, void *callback_arg)
{
USBH_CHECK(hub_req_callback != NULL, ESP_ERR_INVALID_ARG);
USBH_ENTER_CRITICAL();
// Check that USBH is already installed
USBH_CHECK_FROM_CRIT(p_usbh_obj != NULL, ESP_ERR_INVALID_STATE);
// Check that Hub has not be installed yet
USBH_CHECK_FROM_CRIT(p_usbh_obj->constant.hub_req_cb == NULL, ESP_ERR_INVALID_STATE);
p_usbh_obj->constant.hub_req_cb = hub_req_callback;
p_usbh_obj->constant.hub_req_cb_arg = callback_arg;
USBH_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t usbh_hub_add_dev(hcd_port_handle_t port_hdl, usb_speed_t dev_speed, usb_device_handle_t *new_dev_hdl, hcd_pipe_handle_t *default_pipe_hdl)
{
// Note: Parent device handle can be NULL if it's connected to the root hub
USBH_CHECK(new_dev_hdl != NULL, ESP_ERR_INVALID_ARG);
esp_err_t ret;
device_t *dev_obj;
ret = device_alloc(port_hdl, dev_speed, &dev_obj);
if (ret != ESP_OK) {
return ret;
}
// Write-back device handle
*new_dev_hdl = (usb_device_handle_t)dev_obj;
*default_pipe_hdl = dev_obj->constant.default_pipe;
ret = ESP_OK;
return ret;
}
esp_err_t usbh_hub_pass_event(usb_device_handle_t dev_hdl, usbh_hub_event_t hub_event)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
bool call_proc_req_cb;
switch (hub_event) {
case USBH_HUB_EVENT_PORT_ERROR: {
USBH_ENTER_CRITICAL();
dev_obj->dynamic.flags.is_gone = 1;
// Check if the device can be freed now
if (dev_obj->dynamic.ref_count == 0) {
dev_obj->dynamic.flags.waiting_free = 1;
// Device is already waiting free so none of it's EP's will be in use. Can free immediately.
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_FREE_AND_RECOVER); // Port error occurred so we need to recover it
} else {
call_proc_req_cb = _dev_set_actions(dev_obj,
DEV_ACTION_EPn_HALT_FLUSH |
DEV_ACTION_EP0_FLUSH |
DEV_ACTION_EP0_DEQUEUE |
DEV_ACTION_PROP_GONE_EVT);
}
USBH_EXIT_CRITICAL();
break;
}
case USBH_HUB_EVENT_PORT_DISABLED: {
USBH_ENTER_CRITICAL();
assert(dev_obj->dynamic.ref_count == 0); // At this stage, the device should have been closed by all users
dev_obj->dynamic.flags.waiting_free = 1;
call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_FREE);
USBH_EXIT_CRITICAL();
break;
}
default:
return ESP_ERR_INVALID_ARG;
}
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return ESP_OK;
}
// ----------------- Enumeration Related -------------------
esp_err_t usbh_hub_enum_fill_dev_addr(usb_device_handle_t dev_hdl, uint8_t dev_addr)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
dev_obj->dynamic.state = USB_DEVICE_STATE_ADDRESS;
USBH_EXIT_CRITICAL();
// We can modify the info members outside the critical section
dev_obj->constant.address = dev_addr;
return ESP_OK;
}
esp_err_t usbh_hub_enum_fill_dev_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t *device_desc)
{
USBH_CHECK(dev_hdl != NULL && device_desc != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
// We can modify the info members outside the critical section
memcpy((usb_device_desc_t *)dev_obj->constant.desc, device_desc, sizeof(usb_device_desc_t));
return ESP_OK;
}
esp_err_t usbh_hub_enum_fill_config_desc(usb_device_handle_t dev_hdl, const usb_config_desc_t *config_desc_full)
{
USBH_CHECK(dev_hdl != NULL && config_desc_full != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
// Allocate memory to store the configuration descriptor
usb_config_desc_t *config_desc = heap_caps_malloc(config_desc_full->wTotalLength, MALLOC_CAP_DEFAULT); // Buffer to copy over full configuration descriptor (wTotalLength)
if (config_desc == NULL) {
return ESP_ERR_NO_MEM;
}
// Copy the configuration descriptor
memcpy(config_desc, config_desc_full, config_desc_full->wTotalLength);
// Assign the config desc to the device object
assert(dev_obj->constant.config_desc == NULL);
dev_obj->constant.config_desc = config_desc;
return ESP_OK;
}
esp_err_t usbh_hub_enum_fill_str_desc(usb_device_handle_t dev_hdl, const usb_str_desc_t *str_desc, int select)
{
USBH_CHECK(dev_hdl != NULL && str_desc != NULL && (select >= 0 && select < 3), ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
// Allocate memory to store the manufacturer string descriptor
usb_str_desc_t *str_desc_fill = heap_caps_malloc(str_desc->bLength, MALLOC_CAP_DEFAULT);
if (str_desc_fill == NULL) {
return ESP_ERR_NO_MEM;
}
// Copy the string descriptor
memcpy(str_desc_fill, str_desc, str_desc->bLength);
// Assign filled string descriptor to the device object
switch (select) {
case 0:
assert(dev_obj->constant.str_desc_manu == NULL);
dev_obj->constant.str_desc_manu = str_desc_fill;
break;
case 1:
assert(dev_obj->constant.str_desc_product == NULL);
dev_obj->constant.str_desc_product = str_desc_fill;
break;
default: // 2
assert(dev_obj->constant.str_desc_ser_num == NULL);
dev_obj->constant.str_desc_ser_num = str_desc_fill;
break;
}
return ESP_OK;
}
esp_err_t usbh_hub_enum_done(usb_device_handle_t dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
// We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
USBH_ENTER_CRITICAL();
dev_obj->dynamic.state = USB_DEVICE_STATE_CONFIGURED;
// Add the device to list of devices, then trigger a device event
TAILQ_INSERT_TAIL(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry); // Add it to the idle device list first
bool call_proc_req_cb = _dev_set_actions(dev_obj, DEV_ACTION_PROP_NEW);
USBH_EXIT_CRITICAL();
p_usbh_obj->mux_protected.num_device++;
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
// Update the EP0's underlying pipe's callback
ESP_ERROR_CHECK(hcd_pipe_update_callback(dev_obj->constant.default_pipe, ep0_pipe_callback, (void *)dev_obj));
// Call the processing request callback
if (call_proc_req_cb) {
p_usbh_obj->constant.proc_req_cb(USB_PROC_REQ_SOURCE_USBH, false, p_usbh_obj->constant.proc_req_cb_arg);
}
return ESP_OK;
}
esp_err_t usbh_hub_enum_failed(usb_device_handle_t dev_hdl)
{
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
device_free(dev_obj);
return ESP_OK;
}
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