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usb: Fix USBH handling of disconnections

Browse Source 
This commit fixes how the USBH handling of a sudden device disconnection,
more specifically handling of device gone.
- Previously the USBH would only halt, flush, and dequeue the device's
default EP, then send a device gone event to the Host Library layer.
- Now the USBH will also halt and flush all non-default EPs, allowing
all of the URBs to be dequeud.
- Some internal object members are now protected by a mutex instead of
a spinlock.

Closes https://github.com/espressif/esp-idf/issues/7505
This commit is contained in:
Darian Leung 2021-10-27 21:15:46 +08:00
parent 0c758c8557
commit 6a12e28333
2 changed files with 200 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
components/usb/private_include/usbh.h
View File

@ -110,6 +110,7 @@ esp_err_t usbh_uninstall(void);
* - If blocking, the caller can block until a USB_NOTIF_SOURCE_USBH notification is received before running this
* function
*
* @note This function can block
* @return esp_err_t
*/
esp_err_t usbh_process(void);
@ -164,6 +165,7 @@ esp_err_t usbh_dev_get_addr(usb_device_handle_t dev_hdl, uint8_t *dev_addr);
/**
* @brief Get a device's information
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param[out] dev_info Device information
* @return esp_err_t
@ -186,6 +188,7 @@ esp_err_t usbh_dev_get_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t
*
* Simply returns a reference to the internally cached configuration descriptor
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param config_desc_ret
* @return esp_err_t
@ -209,6 +212,7 @@ esp_err_t usbh_dev_submit_ctrl_urb(usb_device_handle_t dev_hdl, urb_t *urb);
* Clients that have opened a device must call this function to allocate all endpoints in an interface that is claimed.
* The pipe handle of the endpoint is returned so that clients can use and control the pipe directly.
*
* @note This function can block
* @note Default pipes are owned by the USBH. For control transfers, use usbh_dev_submit_ctrl_urb() instead
* @note Device must be opened by the client first
*
@ -224,6 +228,7 @@ esp_err_t usbh_ep_alloc(usb_device_handle_t dev_hdl, usbh_ep_config_t *ep_config
*
* Free an endpoint previously opened by usbh_ep_alloc()
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param[in] bEndpointAddress Endpoint's address
* @return esp_err_t
@ -235,6 +240,7 @@ esp_err_t usbh_ep_free(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress);
*
* Get the context variable assigned to and endpoint on allocation.
*
* @note This function can block
* @param[in] dev_hdl Device handle
* @param[in] bEndpointAddress Endpoint's address
* @param[out] context_ret Context variable
@ -336,6 +342,7 @@ esp_err_t usbh_hub_enum_fill_dev_addr(usb_device_handle_t dev_hdl, uint8_t dev_a
*
* @note Hub Driver only
* @note Must call in sequence
* @note This function can block
* @param[in] dev_hdl Device handle
* @param config_desc_full
* @return esp_err_t
@ -360,6 +367,7 @@ esp_err_t usbh_hub_enum_fill_config_num(usb_device_handle_t dev_hdl, uint8_t bCo
*
* @note Hub Driver only
* @note Must call in sequence
* @note This function can block
* @param[in] dev_hdl Device handle
* @return esp_err_t
*/
@ -373,6 +381,7 @@ esp_err_t usbh_hub_enum_done(usb_device_handle_t dev_hdl);
*
* @note Hub Driver only
* @note Must call in sequence
* @note This function can block
* @param[in] dev_hdl Device handle
* @return esp_err_t
*/

271
components/usb/usbh.c
View File

@ -12,6 +12,7 @@
#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"
@ -20,14 +21,15 @@
#include "usb/usb_helpers.h"
#include "usb/usb_types_ch9.h"
//Device action flags. Listed in the order they should handled in. Some actions are mutually exclusive
#define DEV_FLAG_ACTION_SEND_GONE_EVENT 0x01 //Send a USB_HOST_CLIENT_EVENT_DEV_GONE event
//Device action flags. LISTED IN THE ORDER THEY SHOULD BE HANDLED IN within usbh_process(). Some actions are mutually exclusive
#define DEV_FLAG_ACTION_PIPE_HALT_AND_FLUSH 0x01 //Halt all non-default pipes then flush them (called after a device gone is gone)
#define DEV_FLAG_ACTION_DEFAULT_PIPE_FLUSH 0x02 //Retire all URBS in the default pipe
#define DEV_FLAG_ACTION_DEFAULT_PIPE_DEQUEUE 0x04 //Dequeue all URBs from default pipe
#define DEV_FLAG_ACTION_DEFAULT_PIPE_CLEAR 0x08 //Move the default pipe to the active state
#define DEV_FLAG_ACTION_FREE 0x10 //Free the device object
#define DEV_FLAG_ACTION_PORT_DISABLE 0x20
#define DEV_FLAG_ACTION_SEND_NEW 0x40 //Send a new device event
#define DEV_FLAG_ACTION_SEND_GONE_EVENT 0x10 //Send a USB_HOST_CLIENT_EVENT_DEV_GONE event
#define DEV_FLAG_ACTION_FREE 0x20 //Free the device object
#define DEV_FLAG_ACTION_PORT_DISABLE 0x40 //Request the hub driver to disable the port of the device
#define DEV_FLAG_ACTION_SEND_NEW 0x80 //Send a new device event
#define DEV_ENUM_TODO_FLAG_DEV_ADDR 0x01
#define DEV_ENUM_TODO_FLAG_DEV_DESC 0x02
@ -56,10 +58,13 @@ struct device_s {
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 {
usb_config_desc_t *config_desc;
hcd_pipe_handle_t ep_in[EP_NUM_MAX - 1]; //IN EP owner contexts. -1 to exclude the default endpoint
hcd_pipe_handle_t ep_out[EP_NUM_MAX - 1]; //OUT EP owner contexts. -1 to exclude the default endpoint
} dynamic;
} mux_protected;
//Constant members do no change after device allocation and enumeration thus do not require a critical section
struct {
hcd_pipe_handle_t default_pipe;
@ -76,8 +81,11 @@ typedef struct {
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
uint8_t num_device; //Number of enumerated devices
} 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_notif_cb_t notif_cb;
@ -88,6 +96,7 @@ typedef struct {
void *event_cb_arg;
usbh_ctrl_xfer_cb_t ctrl_xfer_cb;
void *ctrl_xfer_cb_arg;
SemaphoreHandle_t mux_lock;
} constant;
} usbh_t;
@ -165,7 +174,7 @@ static void device_free(device_t *dev_obj)
return;
}
//Configuration must be freed
assert(dev_obj->dynamic.config_desc == NULL);
assert(dev_obj->mux_protected.config_desc == NULL); //Sanity check. No need for mux
ESP_ERROR_CHECK(hcd_pipe_free(dev_obj->constant.default_pipe));
heap_caps_free((usb_device_desc_t *)dev_obj->constant.desc);
heap_caps_free(dev_obj);
@ -240,8 +249,28 @@ static bool default_pipe_callback(hcd_pipe_handle_t pipe_hdl, hcd_pipe_event_t p
return yield;
}
static void handle_pipe_halt_and_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 IN pipes
for (int i = 0; i < (EP_NUM_MAX - 1); i++) {
if (dev_obj->mux_protected.ep_in[i] != NULL) {
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.ep_in[i], HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.ep_in[i], HCD_PIPE_CMD_FLUSH));
}
if (dev_obj->mux_protected.ep_out[i] != NULL) {
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.ep_out[i], HCD_PIPE_CMD_HALT));
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->mux_protected.ep_out[i], HCD_PIPE_CMD_FLUSH));
}
}
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
}
static bool handle_dev_free(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);
USBH_ENTER_CRITICAL();
//Remove the device object for it's containing list
if (dev_obj->dynamic.flags.in_pending_list) {
@ -250,13 +279,13 @@ static bool handle_dev_free(device_t *dev_obj)
} else {
TAILQ_REMOVE(&p_usbh_obj->dynamic.devs_idle_tailq, dev_obj, dynamic.tailq_entry);
}
p_usbh_obj->dynamic.num_device--;
bool all_free = (p_usbh_obj->dynamic.num_device == 0);
USBH_EXIT_CRITICAL();
heap_caps_free(dev_obj->dynamic.config_desc);
dev_obj->dynamic.config_desc = NULL;
p_usbh_obj->mux_protected.num_device--;
bool all_free = (p_usbh_obj->mux_protected.num_device == 0);
heap_caps_free(dev_obj->mux_protected.config_desc);
dev_obj->mux_protected.config_desc = NULL;
device_free(dev_obj);
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return all_free;
}
@ -269,11 +298,13 @@ esp_err_t usbh_install(const usbh_config_t *usbh_config)
USBH_CHECK_FROM_CRIT(p_usbh_obj == NULL, ESP_ERR_INVALID_STATE);
USBH_EXIT_CRITICAL();
usbh_t *usbh_obj = heap_caps_calloc(1, sizeof(usbh_t), MALLOC_CAP_DEFAULT);
if (usbh_obj == NULL) {
return ESP_ERR_NO_MEM;
}
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 alloc_err;
}
//Install HCD
ret = hcd_install(&usbh_config->hcd_config);
if (ret != ESP_OK) {
@ -288,6 +319,7 @@ esp_err_t usbh_install(const usbh_config_t *usbh_config)
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();
@ -305,24 +337,47 @@ esp_err_t usbh_install(const usbh_config_t *usbh_config)
assign_err:
ESP_ERROR_CHECK(hcd_uninstall());
hcd_install_err:
alloc_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);
//Check that USBH is in a state to be uninstalled
USBH_CHECK_FROM_CRIT(p_usbh_obj->dynamic.num_device == 0, ESP_ERR_INVALID_STATE);
usbh_t *usbh_obj = p_usbh_obj;
p_usbh_obj = NULL;
USBH_EXIT_CRITICAL();
//Uninstall HCD
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);
//Uninstall HCD, free resources
ESP_ERROR_CHECK(hcd_uninstall());
vSemaphoreDelete(usbh_obj->constant.mux_lock);
heap_caps_free(usbh_obj);
return ESP_OK;
ret = ESP_OK;
return ret;
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_process(void)
@ -340,14 +395,16 @@ esp_err_t usbh_process(void)
dev_obj->dynamic.flags.actions = 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%x", action_flags);
//Sanity check. If the device is being freed, there must not be any other action flags set
assert(!(action_flags & DEV_FLAG_ACTION_FREE) || action_flags == DEV_FLAG_ACTION_FREE);
if (action_flags & DEV_FLAG_ACTION_SEND_GONE_EVENT) {
//Flush the default pipe. Then do an event gone
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);
if (action_flags & DEV_FLAG_ACTION_PIPE_HALT_AND_FLUSH) {
handle_pipe_halt_and_flush(dev_obj);
}
if (action_flags & DEV_FLAG_ACTION_DEFAULT_PIPE_FLUSH) {
ESP_ERROR_CHECK(hcd_pipe_command(dev_obj->constant.default_pipe, HCD_PIPE_CMD_HALT));
@ -371,6 +428,11 @@ esp_err_t usbh_process(void)
//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);
}
if (action_flags & DEV_FLAG_ACTION_SEND_GONE_EVENT) {
//Flush the default pipe. Then do an event gone
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);
}
/*
Note: We make these action flags mutually exclusive in case they happen in rapid succession. They are handled
in the order of precedence
@ -393,6 +455,9 @@ esp_err_t usbh_process(void)
p_usbh_obj->constant.event_cb((usb_device_handle_t)dev_obj, USBH_EVENT_DEV_NEW, p_usbh_obj->constant.event_cb_arg);
}
USBH_ENTER_CRITICAL();
/* ---------------------------------------------------------------------
Re-enter critical sections. All device action flags should have been handled.
--------------------------------------------------------------------- */
}
USBH_EXIT_CRITICAL();
@ -534,19 +599,30 @@ esp_err_t usbh_dev_get_info(usb_device_handle_t dev_hdl, usb_device_info_t *dev_
USBH_CHECK(dev_hdl != NULL && dev_info != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
esp_err_t ret;
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
//Device must be configured, or not attached (if it suddenly disconnected)
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED || dev_obj->dynamic.state == USB_DEVICE_STATE_NOT_ATTACHED, ESP_ERR_INVALID_STATE);
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;
if (dev_obj->dynamic.config_desc == NULL) {
USBH_EXIT_CRITICAL();
if (dev_obj->mux_protected.config_desc == NULL) {
dev_info->bConfigurationValue = 0;
} else {
dev_info->bConfigurationValue = dev_obj->dynamic.config_desc->bConfigurationValue;
dev_info->bConfigurationValue = dev_obj->mux_protected.config_desc->bConfigurationValue;
}
USBH_EXIT_CRITICAL();
return ESP_OK;
ret = ESP_OK;
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_dev_get_desc(usb_device_handle_t dev_hdl, const usb_device_desc_t **dev_desc_ret)
@ -567,12 +643,22 @@ esp_err_t usbh_dev_get_config_desc(usb_device_handle_t dev_hdl, const usb_config
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;
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
//Device must be in the configured state
USBH_ENTER_CRITICAL();
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.state == USB_DEVICE_STATE_CONFIGURED, ESP_ERR_INVALID_STATE);
*config_desc_ret = dev_obj->dynamic.config_desc;
if (dev_obj->dynamic.state != USB_DEVICE_STATE_CONFIGURED) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_INVALID_STATE;
goto exit;
}
USBH_EXIT_CRITICAL();
return ESP_OK;
*config_desc_ret = dev_obj->mux_protected.config_desc;
ret = ESP_OK;
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
esp_err_t usbh_dev_submit_ctrl_urb(usb_device_handle_t dev_hdl, urb_t *urb)
@ -633,21 +719,24 @@ esp_err_t usbh_ep_alloc(usb_device_handle_t dev_hdl, usbh_ep_config_t *ep_config
goto pipe_alloc_err;
}
USBH_ENTER_CRITICAL();
//Check that endpoint has not be allocated yet
bool is_in = ep_config->ep_desc->bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_DIR_MASK;
uint8_t addr = ep_config->ep_desc->bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK;
//Assign the pipe handle
bool assigned = false;
if (is_in && dev_obj->dynamic.ep_in[addr - 1] == NULL) { //Is an IN EP
dev_obj->dynamic.ep_in[addr - 1] = pipe_hdl;
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
if (is_in && dev_obj->mux_protected.ep_in[addr - 1] == NULL) { //Is an IN EP
dev_obj->mux_protected.ep_in[addr - 1] = pipe_hdl;
assigned = true;
} else {
dev_obj->dynamic.ep_out[addr - 1] = pipe_hdl;
dev_obj->mux_protected.ep_out[addr - 1] = pipe_hdl;
assigned = true;
}
dev_obj->dynamic.ref_count--; //Restore ref_count
//Restore ref_count
USBH_ENTER_CRITICAL();
dev_obj->dynamic.ref_count--;
USBH_EXIT_CRITICAL();
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
if (!assigned) {
ret = ESP_ERR_INVALID_STATE;
@ -669,24 +758,38 @@ esp_err_t usbh_ep_free(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress)
USBH_CHECK(dev_hdl != NULL, ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
//Un-assign the pipe handle from the endpoint
esp_err_t ret;
bool is_in = bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_DIR_MASK;
uint8_t addr = bEndpointAddress & USB_B_ENDPOINT_ADDRESS_EP_NUM_MASK;
hcd_pipe_handle_t pipe_hdl;
if (is_in) {
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.ep_in[addr - 1] != NULL, ESP_ERR_INVALID_STATE);
pipe_hdl = dev_obj->dynamic.ep_in[addr - 1];
dev_obj->dynamic.ep_in[addr - 1] = NULL;
} else {
USBH_CHECK_FROM_CRIT(dev_obj->dynamic.ep_out[addr - 1] != NULL, ESP_ERR_INVALID_STATE);
pipe_hdl = dev_obj->dynamic.ep_out[addr - 1];
dev_obj->dynamic.ep_out[addr - 1] = NULL;
}
USBH_EXIT_CRITICAL();
ESP_ERROR_CHECK(hcd_pipe_free(pipe_hdl));
return ESP_OK;
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
//Check if the EP was previously allocated. If so, set it to NULL
if (is_in) {
if (dev_obj->mux_protected.ep_in[addr - 1] != NULL) {
pipe_hdl = dev_obj->mux_protected.ep_in[addr - 1];
dev_obj->mux_protected.ep_in[addr - 1] = NULL;
ret = ESP_OK;
} else {
ret = ESP_ERR_INVALID_STATE;
}
} else {
//EP must have been previously allocated
if (dev_obj->mux_protected.ep_out[addr - 1] != NULL) {
pipe_hdl = dev_obj->mux_protected.ep_out[addr - 1];
dev_obj->mux_protected.ep_out[addr - 1] = NULL;
ret = ESP_OK;
} else {
ret = ESP_ERR_INVALID_STATE;
}
}
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
if (ret == ESP_OK) {
ESP_ERROR_CHECK(hcd_pipe_free(pipe_hdl));
}
return ret;
}
esp_err_t usbh_ep_get_context(usb_device_handle_t dev_hdl, uint8_t bEndpointAddress, void **context_ret)
@ -698,29 +801,30 @@ esp_err_t usbh_ep_get_context(usb_device_handle_t dev_hdl, uint8_t bEndpointAddr
addr <= EP_NUM_MAX &&
context_ret != NULL,
ESP_ERR_INVALID_ARG);
device_t *dev_obj = (device_t *)dev_hdl;
USBH_ENTER_CRITICAL();
//Get the endpoint's corresponding pipe
hcd_pipe_handle_t pipe_hdl;
if (is_in) {
pipe_hdl = dev_obj->dynamic.ep_in[addr - 1];
} else {
pipe_hdl = dev_obj->dynamic.ep_out[addr - 1];
}
esp_err_t ret;
device_t *dev_obj = (device_t *)dev_hdl;
hcd_pipe_handle_t pipe_hdl;
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
//Get the endpoint's corresponding pipe
if (is_in) {
pipe_hdl = dev_obj->mux_protected.ep_in[addr - 1];
} else {
pipe_hdl = dev_obj->mux_protected.ep_out[addr - 1];
}
//Check if the EP was allocated to begin with
if (pipe_hdl == NULL) {
USBH_EXIT_CRITICAL();
ret = ESP_ERR_NOT_FOUND;
goto exit;
}
//Return the context of the pipe
void *context = hcd_pipe_get_context(pipe_hdl);
*context_ret = context;
USBH_EXIT_CRITICAL();
ret = ESP_OK;
exit:
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
return ret;
}
@ -772,11 +876,13 @@ esp_err_t usbh_hub_mark_dev_gone(usb_device_handle_t dev_hdl)
//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 pipes will be in use. Can free immediately.
call_notif_cb = _dev_set_actions(dev_obj, DEV_FLAG_ACTION_FREE);
} else {
call_notif_cb = _dev_set_actions(dev_obj, DEV_FLAG_ACTION_SEND_GONE_EVENT |
call_notif_cb = _dev_set_actions(dev_obj, DEV_FLAG_ACTION_PIPE_HALT_AND_FLUSH |
DEV_FLAG_ACTION_DEFAULT_PIPE_FLUSH |
DEV_FLAG_ACTION_DEFAULT_PIPE_DEQUEUE);
DEV_FLAG_ACTION_DEFAULT_PIPE_DEQUEUE |
DEV_FLAG_ACTION_SEND_GONE_EVENT);
}
USBH_EXIT_CRITICAL();
@ -852,10 +958,11 @@ esp_err_t usbh_hub_enum_fill_config_desc(usb_device_handle_t dev_hdl, const usb_
goto assign_err;
}
USBH_ENTER_CRITICAL();
assert(dev_obj->dynamic.config_desc == NULL);
dev_obj->dynamic.config_desc = config_desc;
USBH_EXIT_CRITICAL();
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
assert(dev_obj->mux_protected.config_desc == NULL);
dev_obj->mux_protected.config_desc = config_desc;
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
//We can modify the info members outside the critical section
dev_obj->constant.enum_todo_flags &= ~DEV_ENUM_TODO_FLAG_CONFIG_DESC;
@ -874,13 +981,16 @@ esp_err_t usbh_hub_enum_done(usb_device_handle_t dev_hdl)
device_t *dev_obj = (device_t *)dev_hdl;
USBH_CHECK(dev_obj->constant.enum_todo_flags == 0, ESP_ERR_INVALID_STATE); //All enumeration stages to be done
//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
p_usbh_obj->dynamic.num_device++;
bool call_notif_cb = _dev_set_actions(dev_obj, DEV_FLAG_ACTION_SEND_NEW);
USBH_EXIT_CRITICAL();
p_usbh_obj->mux_protected.num_device++;
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
//Update the default pipe callback
ESP_ERROR_CHECK(hcd_pipe_update_callback(dev_obj->constant.default_pipe, default_pipe_callback, (void *)dev_obj));
@ -896,10 +1006,11 @@ 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;
USBH_ENTER_CRITICAL();
usb_config_desc_t *config_desc = dev_obj->dynamic.config_desc;
dev_obj->dynamic.config_desc = NULL;
USBH_EXIT_CRITICAL();
//We need to take the mux_lock to access mux_protected members
xSemaphoreTake(p_usbh_obj->constant.mux_lock, portMAX_DELAY);
usb_config_desc_t *config_desc = dev_obj->mux_protected.config_desc;
dev_obj->mux_protected.config_desc = NULL;
xSemaphoreGive(p_usbh_obj->constant.mux_lock);
if (config_desc) {
heap_caps_free(config_desc);