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usbh.c
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usbh.c
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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "tusb_option.h"
#if CFG_TUH_ENABLED
#include "host/hcd.h"
#include "tusb.h"
#include "host/usbh_pvt.h"
#include "hub.h"
//--------------------------------------------------------------------+
// USBH Configuration
//--------------------------------------------------------------------+
#ifndef CFG_TUH_TASK_QUEUE_SZ
#define CFG_TUH_TASK_QUEUE_SZ 16
#endif
#ifndef CFG_TUH_INTERFACE_MAX
#define CFG_TUH_INTERFACE_MAX 8
#endif
//--------------------------------------------------------------------+
// USBH-HCD common data structure
//--------------------------------------------------------------------+
typedef struct
{
// port
uint8_t rhport;
uint8_t hub_addr;
uint8_t hub_port;
struct TU_ATTR_PACKED {
uint8_t speed : 4; // packed speed to save footprint
volatile uint8_t enumerating : 1; // enumeration is in progress, false if not connected or all interfaces are configured
uint8_t TU_RESERVED : 3;
};
} usbh_dev0_t;
typedef struct {
// port, must be same layout as usbh_dev0_t
uint8_t rhport;
uint8_t hub_addr;
uint8_t hub_port;
uint8_t speed;
// Device State
struct TU_ATTR_PACKED {
volatile uint8_t connected : 1; // After 1st transfer
volatile uint8_t addressed : 1; // After SET_ADDR
volatile uint8_t configured : 1; // After SET_CONFIG and all drivers are configured
volatile uint8_t suspended : 1; // Bus suspended
// volatile uint8_t removing : 1; // Physically disconnected, waiting to be processed by usbh
};
// Device Descriptor
uint8_t ep0_size;
uint16_t vid;
uint16_t pid;
uint8_t i_manufacturer;
uint8_t i_product;
uint8_t i_serial;
// Configuration Descriptor
// uint8_t interface_count; // bNumInterfaces alias
// Endpoint & Interface
uint8_t itf2drv[CFG_TUH_INTERFACE_MAX]; // map interface number to driver (0xff is invalid)
uint8_t ep2drv[CFG_TUH_ENDPOINT_MAX][2]; // map endpoint to driver ( 0xff is invalid ), can use only 4-bit each
tu_edpt_state_t ep_status[CFG_TUH_ENDPOINT_MAX][2];
#if CFG_TUH_API_EDPT_XFER
// TODO array can be CFG_TUH_ENDPOINT_MAX-1
struct {
tuh_xfer_cb_t complete_cb;
uintptr_t user_data;
}ep_callback[CFG_TUH_ENDPOINT_MAX][2];
#endif
} usbh_device_t;
//--------------------------------------------------------------------+
// MACRO CONSTANT TYPEDEF
//--------------------------------------------------------------------+
#if CFG_TUSB_DEBUG >= CFG_TUH_LOG_LEVEL
#define DRIVER_NAME(_name) .name = _name,
#else
#define DRIVER_NAME(_name)
#endif
static usbh_class_driver_t const usbh_class_drivers[] =
{
#if CFG_TUH_CDC
{
DRIVER_NAME("CDC")
.init = cdch_init,
.open = cdch_open,
.set_config = cdch_set_config,
.xfer_cb = cdch_xfer_cb,
.close = cdch_close
},
#endif
#if CFG_TUH_MSC
{
DRIVER_NAME("MSC")
.init = msch_init,
.open = msch_open,
.set_config = msch_set_config,
.xfer_cb = msch_xfer_cb,
.close = msch_close
},
#endif
#if CFG_TUH_HID
{
DRIVER_NAME("HID")
.init = hidh_init,
.open = hidh_open,
.set_config = hidh_set_config,
.xfer_cb = hidh_xfer_cb,
.close = hidh_close
},
#endif
#if CFG_TUH_HUB
{
DRIVER_NAME("HUB")
.init = hub_init,
.open = hub_open,
.set_config = hub_set_config,
.xfer_cb = hub_xfer_cb,
.close = hub_close
},
#endif
#if CFG_TUH_VENDOR
{
DRIVER_NAME("VENDOR")
.init = cush_init,
.open = cush_open_subtask,
.xfer_cb = cush_isr,
.close = cush_close
}
#endif
};
enum { BUILTIN_DRIVER_COUNT = TU_ARRAY_SIZE(usbh_class_drivers) };
enum { CONFIG_NUM = 1 }; // default to use configuration 1
// Additional class drivers implemented by application
tu_static usbh_class_driver_t const * _app_driver = NULL;
tu_static uint8_t _app_driver_count = 0;
#define TOTAL_DRIVER_COUNT (_app_driver_count + BUILTIN_DRIVER_COUNT)
static inline usbh_class_driver_t const *get_driver(uint8_t drv_id) {
usbh_class_driver_t const *driver = NULL;
if ( drv_id < _app_driver_count ) {
driver = &_app_driver[drv_id];
} else if ( drv_id < TOTAL_DRIVER_COUNT && BUILTIN_DRIVER_COUNT > 0) {
driver = &usbh_class_drivers[drv_id - _app_driver_count];
}
return driver;
}
//--------------------------------------------------------------------+
// INTERNAL OBJECT & FUNCTION DECLARATION
//--------------------------------------------------------------------+
// sum of end device + hub
#define TOTAL_DEVICES (CFG_TUH_DEVICE_MAX + CFG_TUH_HUB)
static uint8_t _usbh_controller = TUSB_INDEX_INVALID_8;
// Device with address = 0 for enumeration
static usbh_dev0_t _dev0;
// all devices excluding zero-address
// hub address start from CFG_TUH_DEVICE_MAX+1
// TODO: hub can has its own simpler struct to save memory
static usbh_device_t _usbh_devices[TOTAL_DEVICES];
// Mutex for claiming endpoint
#if OSAL_MUTEX_REQUIRED
static osal_mutex_def_t _usbh_mutexdef;
static osal_mutex_t _usbh_mutex;
#else
#define _usbh_mutex NULL
#endif
// Event queue
// usbh_int_set is used as mutex in OS NONE config
OSAL_QUEUE_DEF(usbh_int_set, _usbh_qdef, CFG_TUH_TASK_QUEUE_SZ, hcd_event_t);
static osal_queue_t _usbh_q;
CFG_TUH_MEM_SECTION CFG_TUH_MEM_ALIGN
static uint8_t _usbh_ctrl_buf[CFG_TUH_ENUMERATION_BUFSIZE];
// Control transfers: since most controllers do not support multiple control transfers
// on multiple devices concurrently and control transfers are not used much except for
// enumeration, we will only execute control transfers one at a time.
CFG_TUH_MEM_SECTION struct
{
CFG_TUH_MEM_ALIGN tusb_control_request_t request;
uint8_t* buffer;
tuh_xfer_cb_t complete_cb;
uintptr_t user_data;
uint8_t daddr;
volatile uint8_t stage;
volatile uint16_t actual_len;
}_ctrl_xfer;
//------------- Helper Function -------------//
TU_ATTR_ALWAYS_INLINE static inline usbh_device_t* get_device(uint8_t dev_addr) {
TU_VERIFY(dev_addr > 0 && dev_addr <= TOTAL_DEVICES, NULL);
return &_usbh_devices[dev_addr-1];
}
static bool enum_new_device(hcd_event_t* event);
static void process_removing_device(uint8_t rhport, uint8_t hub_addr, uint8_t hub_port);
static bool usbh_edpt_control_open(uint8_t dev_addr, uint8_t max_packet_size);
static bool usbh_control_xfer_cb (uint8_t daddr, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes);
#if CFG_TUSB_OS == OPT_OS_NONE
// TODO rework time-related function later
// weak and overridable
TU_ATTR_WEAK void osal_task_delay(uint32_t msec) {
const uint32_t start = hcd_frame_number(_usbh_controller);
while ( ( hcd_frame_number(_usbh_controller) - start ) < msec ) {}
}
#endif
TU_ATTR_ALWAYS_INLINE static inline bool queue_event(hcd_event_t const * event, bool in_isr) {
bool ret = osal_queue_send(_usbh_q, event, in_isr);
if (tuh_event_hook_cb) tuh_event_hook_cb(event->rhport, event->event_id, in_isr);
return ret;
}
//--------------------------------------------------------------------+
// Device API
//--------------------------------------------------------------------+
bool tuh_mounted(uint8_t dev_addr) {
usbh_device_t *dev = get_device(dev_addr);
TU_VERIFY(dev);
return dev->configured;
}
bool tuh_vid_pid_get(uint8_t dev_addr, uint16_t *vid, uint16_t *pid) {
*vid = *pid = 0;
usbh_device_t const *dev = get_device(dev_addr);
TU_VERIFY(dev && dev->addressed && dev->vid != 0);
*vid = dev->vid;
*pid = dev->pid;
return true;
}
tusb_speed_t tuh_speed_get(uint8_t dev_addr) {
usbh_device_t *dev = get_device(dev_addr);
return (tusb_speed_t) (dev ? get_device(dev_addr)->speed : _dev0.speed);
}
bool tuh_rhport_is_active(uint8_t rhport) {
return _usbh_controller == rhport;
}
bool tuh_rhport_reset_bus(uint8_t rhport, bool active) {
TU_VERIFY(tuh_rhport_is_active(rhport));
if ( active ) {
hcd_port_reset(rhport);
} else {
hcd_port_reset_end(rhport);
}
return true;
}
//--------------------------------------------------------------------+
// PUBLIC API (Parameter Verification is required)
//--------------------------------------------------------------------+
bool tuh_configure(uint8_t rhport, uint32_t cfg_id, const void *cfg_param) {
if ( hcd_configure ) {
return hcd_configure(rhport, cfg_id, cfg_param);
} else {
return false;
}
}
static void clear_device(usbh_device_t* dev) {
tu_memclr(dev, sizeof(usbh_device_t));
memset(dev->itf2drv, TUSB_INDEX_INVALID_8, sizeof(dev->itf2drv)); // invalid mapping
memset(dev->ep2drv , TUSB_INDEX_INVALID_8, sizeof(dev->ep2drv )); // invalid mapping
}
bool tuh_inited(void) {
return _usbh_controller != TUSB_INDEX_INVALID_8;
}
bool tuh_init(uint8_t controller_id) {
// skip if already initialized
if ( tuh_inited() ) return true;
TU_LOG_USBH("USBH init on controller %u\r\n", controller_id);
TU_LOG_INT(CFG_TUH_LOG_LEVEL, sizeof(usbh_device_t));
TU_LOG_INT(CFG_TUH_LOG_LEVEL, sizeof(hcd_event_t));
TU_LOG_INT(CFG_TUH_LOG_LEVEL, sizeof(_ctrl_xfer));
TU_LOG_INT(CFG_TUH_LOG_LEVEL, sizeof(tuh_xfer_t));
TU_LOG_INT(CFG_TUH_LOG_LEVEL, sizeof(tu_fifo_t));
TU_LOG_INT(CFG_TUH_LOG_LEVEL, sizeof(tu_edpt_stream_t));
// Event queue
_usbh_q = osal_queue_create( &_usbh_qdef );
TU_ASSERT(_usbh_q != NULL);
#if OSAL_MUTEX_REQUIRED
// Init mutex
_usbh_mutex = osal_mutex_create(&_usbh_mutexdef);
TU_ASSERT(_usbh_mutex);
#endif
// Get application driver if available
if ( usbh_app_driver_get_cb ) {
_app_driver = usbh_app_driver_get_cb(&_app_driver_count);
}
// Device
tu_memclr(&_dev0, sizeof(_dev0));
tu_memclr(_usbh_devices, sizeof(_usbh_devices));
tu_memclr(&_ctrl_xfer, sizeof(_ctrl_xfer));
for(uint8_t i=0; i<TOTAL_DEVICES; i++)
{
clear_device(&_usbh_devices[i]);
}
// Class drivers
for (uint8_t drv_id = 0; drv_id < TOTAL_DRIVER_COUNT; drv_id++)
{
usbh_class_driver_t const * driver = get_driver(drv_id);
if ( driver )
{
TU_LOG_USBH("%s init\r\n", driver->name);
driver->init();
}
}
_usbh_controller = controller_id;;
TU_ASSERT(hcd_init(controller_id));
hcd_int_enable(controller_id);
return true;
}
bool tuh_task_event_ready(void) {
// Skip if stack is not initialized
if ( !tuh_inited() ) return false;
return !osal_queue_empty(_usbh_q);
}
/* USB Host Driver task
* This top level thread manages all host controller event and delegates events to class-specific drivers.
* This should be called periodically within the mainloop or rtos thread.
*
@code
int main(void)
{
application_init();
tusb_init();
while(1) // the mainloop
{
application_code();
tuh_task(); // tinyusb host task
}
}
@endcode
*/
void tuh_task_ext(uint32_t timeout_ms, bool in_isr) {
(void) in_isr; // not implemented yet
// Skip if stack is not initialized
if ( !tuh_inited() ) return;
// Loop until there is no more events in the queue
while (1)
{
hcd_event_t event;
if ( !osal_queue_receive(_usbh_q, &event, timeout_ms) ) return;
switch (event.event_id)
{
case HCD_EVENT_DEVICE_ATTACH:
// due to the shared _usbh_ctrl_buf, we must complete enumerating one device before enumerating another one.
// TODO better to have an separated queue for newly attached devices
if ( _dev0.enumerating ) {
TU_LOG_USBH("[%u:] USBH Defer Attach until current enumeration complete\r\n", event.rhport);
bool is_empty = osal_queue_empty(_usbh_q);
queue_event(&event, in_isr);
if (is_empty) {
// Exit if this is the only event in the queue, otherwise we may loop forever
return;
}
}else {
TU_LOG_USBH("[%u:] USBH DEVICE ATTACH\r\n", event.rhport);
_dev0.enumerating = 1;
enum_new_device(&event);
}
break;
case HCD_EVENT_DEVICE_REMOVE:
TU_LOG_USBH("[%u:%u:%u] USBH DEVICE REMOVED\r\n", event.rhport, event.connection.hub_addr, event.connection.hub_port);
process_removing_device(event.rhport, event.connection.hub_addr, event.connection.hub_port);
#if CFG_TUH_HUB
// TODO remove
if ( event.connection.hub_addr != 0) {
// done with hub, waiting for next data on status pipe
(void) hub_edpt_status_xfer( event.connection.hub_addr );
}
#endif
break;
case HCD_EVENT_XFER_COMPLETE:
{
uint8_t const ep_addr = event.xfer_complete.ep_addr;
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const ep_dir = tu_edpt_dir(ep_addr);
TU_LOG_USBH("on EP %02X with %u bytes: %s\r\n", ep_addr, (unsigned int) event.xfer_complete.len,
tu_str_xfer_result[event.xfer_complete.result]);
if (event.dev_addr == 0) {
// device 0 only has control endpoint
TU_ASSERT(epnum == 0, );
usbh_control_xfer_cb(event.dev_addr, ep_addr, (xfer_result_t) event.xfer_complete.result, event.xfer_complete.len);
} else {
usbh_device_t* dev = get_device(event.dev_addr);
TU_VERIFY(dev && dev->connected, );
dev->ep_status[epnum][ep_dir].busy = 0;
dev->ep_status[epnum][ep_dir].claimed = 0;
if ( 0 == epnum ) {
usbh_control_xfer_cb(event.dev_addr, ep_addr, (xfer_result_t) event.xfer_complete.result,
event.xfer_complete.len);
}else {
// Prefer application callback over built-in one if available. This occurs when tuh_edpt_xfer() is used
// with enabled driver e.g HID endpoint
#if CFG_TUH_API_EDPT_XFER
tuh_xfer_cb_t const complete_cb = dev->ep_callback[epnum][ep_dir].complete_cb;
if ( complete_cb ) {
// re-construct xfer info
tuh_xfer_t xfer = {
.daddr = event.dev_addr,
.ep_addr = ep_addr,
.result = event.xfer_complete.result,
.actual_len = event.xfer_complete.len,
.buflen = 0, // not available
.buffer = NULL, // not available
.complete_cb = complete_cb,
.user_data = dev->ep_callback[epnum][ep_dir].user_data
};
complete_cb(&xfer);
}else
#endif
{
uint8_t drv_id = dev->ep2drv[epnum][ep_dir];
usbh_class_driver_t const * driver = get_driver(drv_id);
if ( driver )
{
TU_LOG_USBH("%s xfer callback\r\n", driver->name);
driver->xfer_cb(event.dev_addr, ep_addr, (xfer_result_t) event.xfer_complete.result,
event.xfer_complete.len);
}
else
{
// no driver/callback responsible for this transfer
TU_ASSERT(false,);
}
}
}
}
}
break;
case USBH_EVENT_FUNC_CALL:
if ( event.func_call.func ) event.func_call.func(event.func_call.param);
break;
default: break;
}
#if CFG_TUSB_OS != OPT_OS_NONE && CFG_TUSB_OS != OPT_OS_PICO
// return if there is no more events, for application to run other background
if (osal_queue_empty(_usbh_q)) return;
#endif
}
}
//--------------------------------------------------------------------+
// Control transfer
//--------------------------------------------------------------------+
static void _control_blocking_complete_cb(tuh_xfer_t* xfer)
{
// update result
*((xfer_result_t*) xfer->user_data) = xfer->result;
}
// TODO timeout_ms is not supported yet
bool tuh_control_xfer (tuh_xfer_t* xfer) {
// EP0 with setup packet
TU_VERIFY(xfer->ep_addr == 0 && xfer->setup);
// Check if device is still connected (enumerating for dev0)
uint8_t const daddr = xfer->daddr;
if ( daddr == 0 ) {
if (!_dev0.enumerating) return false;
} else {
usbh_device_t const* dev = get_device(daddr);
if (dev && dev->connected == 0) return false;
}
// pre-check to help reducing mutex lock
TU_VERIFY(_ctrl_xfer.stage == CONTROL_STAGE_IDLE);
(void) osal_mutex_lock(_usbh_mutex, OSAL_TIMEOUT_WAIT_FOREVER);
bool const is_idle = (_ctrl_xfer.stage == CONTROL_STAGE_IDLE);
if (is_idle) {
_ctrl_xfer.stage = CONTROL_STAGE_SETUP;
_ctrl_xfer.daddr = daddr;
_ctrl_xfer.actual_len = 0;
_ctrl_xfer.request = (*xfer->setup);
_ctrl_xfer.buffer = xfer->buffer;
_ctrl_xfer.complete_cb = xfer->complete_cb;
_ctrl_xfer.user_data = xfer->user_data;
}
(void) osal_mutex_unlock(_usbh_mutex);
TU_VERIFY(is_idle);
const uint8_t rhport = usbh_get_rhport(daddr);
TU_LOG_USBH("[%u:%u] %s: ", rhport, daddr,
(xfer->setup->bmRequestType_bit.type == TUSB_REQ_TYPE_STANDARD && xfer->setup->bRequest <= TUSB_REQ_SYNCH_FRAME) ?
tu_str_std_request[xfer->setup->bRequest] : "Class Request");
TU_LOG_BUF(CFG_TUH_LOG_LEVEL, xfer->setup, 8);
TU_LOG_USBH("\r\n");
if (xfer->complete_cb) {
TU_ASSERT( hcd_setup_send(rhport, daddr, (uint8_t const*) &_ctrl_xfer.request) );
}else {
// blocking if complete callback is not provided
// change callback to internal blocking, and result as user argument
volatile xfer_result_t result = XFER_RESULT_INVALID;
// use user_data to point to xfer_result_t
_ctrl_xfer.user_data = (uintptr_t) &result;
_ctrl_xfer.complete_cb = _control_blocking_complete_cb;
TU_ASSERT( hcd_setup_send(rhport, daddr, (uint8_t*) &_ctrl_xfer.request) );
while (result == XFER_RESULT_INVALID) {
// Note: this can be called within an callback ie. part of tuh_task()
// therefore event with RTOS tuh_task() still need to be invoked
if (tuh_task_event_ready()) {
tuh_task();
}
// TODO probably some timeout to prevent hanged
}
// update transfer result, user_data is expected to point to xfer_result_t
if (xfer->user_data != 0) {
*((xfer_result_t*) xfer->user_data) = result;
}
xfer->result = result;
xfer->actual_len = _ctrl_xfer.actual_len;
}
return true;
}
TU_ATTR_ALWAYS_INLINE static inline void _set_control_xfer_stage(uint8_t stage)
{
(void) osal_mutex_lock(_usbh_mutex, OSAL_TIMEOUT_WAIT_FOREVER);
_ctrl_xfer.stage = stage;
(void) osal_mutex_unlock(_usbh_mutex);
}
static void _xfer_complete(uint8_t daddr, xfer_result_t result)
{
TU_LOG_USBH("\r\n");
// duplicate xfer since user can execute control transfer within callback
tusb_control_request_t const request = _ctrl_xfer.request;
tuh_xfer_t xfer_temp =
{
.daddr = daddr,
.ep_addr = 0,
.result = result,
.setup = &request,
.actual_len = (uint32_t) _ctrl_xfer.actual_len,
.buffer = _ctrl_xfer.buffer,
.complete_cb = _ctrl_xfer.complete_cb,
.user_data = _ctrl_xfer.user_data
};
_set_control_xfer_stage(CONTROL_STAGE_IDLE);
if (xfer_temp.complete_cb)
{
xfer_temp.complete_cb(&xfer_temp);
}
}
static bool usbh_control_xfer_cb (uint8_t dev_addr, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes) {
(void) ep_addr;
const uint8_t rhport = usbh_get_rhport(dev_addr);
tusb_control_request_t const * request = &_ctrl_xfer.request;
if (XFER_RESULT_SUCCESS != result) {
TU_LOG1("[%u:%u] Control %s, xferred_bytes = %lu\r\n", rhport, dev_addr, result == XFER_RESULT_STALLED ? "STALLED" : "FAILED", xferred_bytes);
TU_LOG1_BUF(request, 8);
TU_LOG1("\r\n");
// terminate transfer if any stage failed
_xfer_complete(dev_addr, result);
}else {
switch(_ctrl_xfer.stage) {
case CONTROL_STAGE_SETUP:
if (request->wLength) {
// DATA stage: initial data toggle is always 1
_set_control_xfer_stage(CONTROL_STAGE_DATA);
TU_ASSERT( hcd_edpt_xfer(rhport, dev_addr, tu_edpt_addr(0, request->bmRequestType_bit.direction), _ctrl_xfer.buffer, request->wLength) );
return true;
}
TU_ATTR_FALLTHROUGH;
case CONTROL_STAGE_DATA:
if (request->wLength) {
TU_LOG_USBH("[%u:%u] Control data:\r\n", rhport, dev_addr);
TU_LOG_MEM(CFG_TUH_LOG_LEVEL, _ctrl_xfer.buffer, xferred_bytes, 2);
}
_ctrl_xfer.actual_len = (uint16_t) xferred_bytes;
// ACK stage: toggle is always 1
_set_control_xfer_stage(CONTROL_STAGE_ACK);
TU_ASSERT( hcd_edpt_xfer(rhport, dev_addr, tu_edpt_addr(0, 1-request->bmRequestType_bit.direction), NULL, 0) );
break;
case CONTROL_STAGE_ACK:
_xfer_complete(dev_addr, result);
break;
default: return false;
}
}
return true;
}
//--------------------------------------------------------------------+
//
//--------------------------------------------------------------------+
bool tuh_edpt_xfer(tuh_xfer_t* xfer)
{
uint8_t const daddr = xfer->daddr;
uint8_t const ep_addr = xfer->ep_addr;
TU_VERIFY(daddr && ep_addr);
TU_VERIFY(usbh_edpt_claim(daddr, ep_addr));
if ( !usbh_edpt_xfer_with_callback(daddr, ep_addr, xfer->buffer, (uint16_t) xfer->buflen, xfer->complete_cb, xfer->user_data) )
{
usbh_edpt_release(daddr, ep_addr);
return false;
}
return true;
}
bool tuh_edpt_abort_xfer(uint8_t daddr, uint8_t ep_addr) {
usbh_device_t* dev = get_device(daddr);
TU_VERIFY(dev);
TU_LOG_USBH("[%u] Aborted transfer on EP %02X\r\n", daddr, ep_addr);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
if ( epnum == 0 ) {
// control transfer: only 1 control at a time, check if we are aborting the current one
TU_VERIFY(daddr == _ctrl_xfer.daddr && _ctrl_xfer.stage != CONTROL_STAGE_IDLE);
TU_VERIFY(hcd_edpt_abort_xfer(dev->rhport, daddr, ep_addr));
// reset control transfer state to idle
_set_control_xfer_stage(CONTROL_STAGE_IDLE);
} else {
// non-control skip if not busy
TU_VERIFY(dev->ep_status[epnum][dir].busy);
TU_VERIFY(hcd_edpt_abort_xfer(dev->rhport, daddr, ep_addr));
// mark as ready and release endpoint if transfer is aborted
dev->ep_status[epnum][dir].busy = false;
usbh_edpt_release(daddr, ep_addr);
}
return true;
}
//--------------------------------------------------------------------+
// USBH API For Class Driver
//--------------------------------------------------------------------+
uint8_t usbh_get_rhport(uint8_t dev_addr) {
usbh_device_t *dev = get_device(dev_addr);
return dev ? dev->rhport : _dev0.rhport;
}
uint8_t *usbh_get_enum_buf(void) {
return _usbh_ctrl_buf;
}
void usbh_int_set(bool enabled) {
// TODO all host controller if multiple are used since they shared the same event queue
if (enabled) {
hcd_int_enable(_usbh_controller);
} else {
hcd_int_disable(_usbh_controller);
}
}
void usbh_defer_func(osal_task_func_t func, void *param, bool in_isr) {
hcd_event_t event = { 0 };
event.event_id = USBH_EVENT_FUNC_CALL;
event.func_call.func = func;
event.func_call.param = param;
queue_event(&event, in_isr);
}
//--------------------------------------------------------------------+
// Endpoint API
//--------------------------------------------------------------------+
// Claim an endpoint for transfer
bool usbh_edpt_claim(uint8_t dev_addr, uint8_t ep_addr)
{
// Note: addr0 only use tuh_control_xfer
usbh_device_t* dev = get_device(dev_addr);
TU_ASSERT(dev && dev->connected);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
TU_VERIFY(tu_edpt_claim(&dev->ep_status[epnum][dir], _usbh_mutex));
TU_LOG_USBH("[%u] Claimed EP 0x%02x\r\n", dev_addr, ep_addr);
return true;
}
// Release an claimed endpoint due to failed transfer attempt
bool usbh_edpt_release(uint8_t dev_addr, uint8_t ep_addr)
{
// Note: addr0 only use tuh_control_xfer
usbh_device_t* dev = get_device(dev_addr);
TU_VERIFY(dev && dev->connected);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
TU_VERIFY(tu_edpt_release(&dev->ep_status[epnum][dir], _usbh_mutex));
TU_LOG_USBH("[%u] Released EP 0x%02x\r\n", dev_addr, ep_addr);
return true;
}
// Submit an transfer
// TODO call usbh_edpt_release if failed
bool usbh_edpt_xfer_with_callback(uint8_t dev_addr, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes,
tuh_xfer_cb_t complete_cb, uintptr_t user_data)
{
(void) complete_cb;
(void) user_data;
usbh_device_t* dev = get_device(dev_addr);
TU_VERIFY(dev);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
tu_edpt_state_t* ep_state = &dev->ep_status[epnum][dir];
TU_LOG_USBH(" Queue EP %02X with %u bytes ... \r\n", ep_addr, total_bytes);
// Attempt to transfer on a busy endpoint, sound like an race condition !
TU_ASSERT(ep_state->busy == 0);
// Set busy first since the actual transfer can be complete before hcd_edpt_xfer()
// could return and USBH task can preempt and clear the busy
ep_state->busy = 1;
#if CFG_TUH_API_EDPT_XFER
dev->ep_callback[epnum][dir].complete_cb = complete_cb;
dev->ep_callback[epnum][dir].user_data = user_data;
#endif
if ( hcd_edpt_xfer(dev->rhport, dev_addr, ep_addr, buffer, total_bytes) )
{
TU_LOG_USBH("OK\r\n");
return true;
}else
{
// HCD error, mark endpoint as ready to allow next transfer
ep_state->busy = 0;
ep_state->claimed = 0;
TU_LOG1("Failed\r\n");
// TU_BREAKPOINT();
return false;
}
}
static bool usbh_edpt_control_open(uint8_t dev_addr, uint8_t max_packet_size)
{
TU_LOG_USBH("[%u:%u] Open EP0 with Size = %u\r\n", usbh_get_rhport(dev_addr), dev_addr, max_packet_size);
tusb_desc_endpoint_t ep0_desc =
{
.bLength = sizeof(tusb_desc_endpoint_t),
.bDescriptorType = TUSB_DESC_ENDPOINT,
.bEndpointAddress = 0,
.bmAttributes = { .xfer = TUSB_XFER_CONTROL },
.wMaxPacketSize = max_packet_size,
.bInterval = 0
};
return hcd_edpt_open(usbh_get_rhport(dev_addr), dev_addr, &ep0_desc);
}
bool tuh_edpt_open(uint8_t dev_addr, tusb_desc_endpoint_t const * desc_ep)
{
TU_ASSERT( tu_edpt_validate(desc_ep, tuh_speed_get(dev_addr)) );
return hcd_edpt_open(usbh_get_rhport(dev_addr), dev_addr, desc_ep);
}
bool usbh_edpt_busy(uint8_t dev_addr, uint8_t ep_addr) {
usbh_device_t* dev = get_device(dev_addr);
TU_VERIFY(dev);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
return dev->ep_status[epnum][dir].busy;
}
//--------------------------------------------------------------------+
// HCD Event Handler
//--------------------------------------------------------------------+
void hcd_devtree_get_info(uint8_t dev_addr, hcd_devtree_info_t* devtree_info)
{
usbh_device_t const* dev = get_device(dev_addr);
if (dev)
{
devtree_info->rhport = dev->rhport;
devtree_info->hub_addr = dev->hub_addr;
devtree_info->hub_port = dev->hub_port;
devtree_info->speed = dev->speed;
}else
{
devtree_info->rhport = _dev0.rhport;
devtree_info->hub_addr = _dev0.hub_addr;
devtree_info->hub_port = _dev0.hub_port;
devtree_info->speed = _dev0.speed;
}
}
TU_ATTR_FAST_FUNC void hcd_event_handler(hcd_event_t const* event, bool in_isr) {
switch (event->event_id) {
case HCD_EVENT_DEVICE_REMOVE:
// FIXME device remove from a hub need an HCD API for hcd to free up endpoint
// mark device as removing to prevent further xfer before the event is processed in usbh task
// Check if dev0 is removed
if ((event->rhport == _dev0.rhport) && (event->connection.hub_addr == _dev0.hub_addr) &&
(event->connection.hub_port == _dev0.hub_port)) {
_dev0.enumerating = 0;
}
break;
default: break;
}
queue_event(event, in_isr);
}
//--------------------------------------------------------------------+
// Descriptors Async
//--------------------------------------------------------------------+
// generic helper to get a descriptor
// if blocking, user_data is pointed to xfer_result
static bool _get_descriptor(uint8_t daddr, uint8_t type, uint8_t index, uint16_t language_id, void* buffer, uint16_t len,
tuh_xfer_cb_t complete_cb, uintptr_t user_data)
{
tusb_control_request_t const request =
{
.bmRequestType_bit =
{
.recipient = TUSB_REQ_RCPT_DEVICE,
.type = TUSB_REQ_TYPE_STANDARD,
.direction = TUSB_DIR_IN
},
.bRequest = TUSB_REQ_GET_DESCRIPTOR,
.wValue = tu_htole16( TU_U16(type, index) ),
.wIndex = tu_htole16(language_id),
.wLength = tu_htole16(len)
};
tuh_xfer_t xfer =
{
.daddr = daddr,
.ep_addr = 0,
.setup = &request,
.buffer = buffer,
.complete_cb = complete_cb,
.user_data = user_data
};
return tuh_control_xfer(&xfer);
}
bool tuh_descriptor_get(uint8_t daddr, uint8_t type, uint8_t index, void* buffer, uint16_t len,
tuh_xfer_cb_t complete_cb, uintptr_t user_data)
{
return _get_descriptor(daddr, type, index, 0x0000, buffer, len, complete_cb, user_data);
}
bool tuh_descriptor_get_device(uint8_t daddr, void* buffer, uint16_t len,
tuh_xfer_cb_t complete_cb, uintptr_t user_data)
{
len = tu_min16(len, sizeof(tusb_desc_device_t));
return tuh_descriptor_get(daddr, TUSB_DESC_DEVICE, 0, buffer, len, complete_cb, user_data);
}
bool tuh_descriptor_get_configuration(uint8_t daddr, uint8_t index, void* buffer, uint16_t len,
tuh_xfer_cb_t complete_cb, uintptr_t user_data)
{
return tuh_descriptor_get(daddr, TUSB_DESC_CONFIGURATION, index, buffer, len, complete_cb, user_data);
}
//------------- String Descriptor -------------//