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nrf5x: refactor device control transfer.

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- make control transfer as part of usbd. Class driver must use
usbd_control_ API() instead of dcd_ api.
- change the signature of class driver's control_request
- allow control request complete to stall in staus stage
- move control request parser & handling to usbd.
This commit is contained in:
hathach
2018-11-16 21:56:39 +07:00
parent b62ca2e5cd
commit 215f8603b1
15 changed files with 491 additions and 452 deletions
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283
src/device/control.c
View File

@@ -46,216 +46,125 @@
#include "control.h"
#include "device/usbd_pvt.h"
enum
{
EDPT_CTRL_OUT = 0x00,
EDPT_CTRL_IN = 0x80
};
typedef struct {
tusb_control_request_t request;
void* buffer;
uint16_t total_len;
uint16_t total_transferred;
bool (*complete_cb) (uint8_t, tusb_control_request_t const * );
} control_t;
control_t control_state;
CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN uint8_t _shared_control_buffer[64];
CFG_TUSB_ATTR_USBRAM CFG_TUSB_MEM_ALIGN uint8_t _usbd_ctrl_buf[CFG_TUD_ENDOINT0_SIZE];
void controld_reset(uint8_t rhport) {
control_state.current_stage = CONTROL_STAGE_SETUP;
void usbd_control_reset (uint8_t rhport)
{
tu_varclr(&control_state);
}
// Helper to send STATUS (zero length) packet
// Note dir is value of direction bit in setup packet (i.e DATA stage direction)
static inline bool dcd_control_status(uint8_t rhport, uint8_t dir)
void usbd_control_stall(uint8_t rhport)
{
dcd_edpt_stall(rhport, 0);
}
bool usbd_control_status(uint8_t rhport, tusb_control_request_t const * request)
{
uint8_t ep_addr = 0;
// Invert the direction.
if (dir == TUSB_DIR_OUT) {
ep_addr |= TUSB_DIR_IN_MASK;
}
// status direction is reversed to one in the setup packet
return dcd_edpt_xfer(rhport, ep_addr, NULL, 0);
}
static inline void dcd_control_stall(uint8_t rhport)
{
dcd_edpt_stall(rhport, 0 | TUSB_DIR_IN_MASK);
return dcd_edpt_xfer(rhport, request->bmRequestType_bit.direction ? EDPT_CTRL_OUT : EDPT_CTRL_IN, NULL, 0);
}
// return len of descriptor and change pointer to descriptor's buffer
static uint16_t get_descriptor(uint8_t rhport, tusb_control_request_t const * const p_request, uint8_t const ** pp_buffer)
// Each transaction is up to endpoint0's max packet size
static bool start_control_data_xact(uint8_t rhport)
{
(void) rhport;
uint16_t const xact_len = tu_min16(control_state.total_len - control_state.total_transferred, CFG_TUD_ENDOINT0_SIZE);
tusb_desc_type_t const desc_type = (tusb_desc_type_t) tu_u16_high(p_request->wValue);
uint8_t const desc_index = tu_u16_low( p_request->wValue );
uint8_t ep_addr = EDPT_CTRL_OUT;
uint8_t const * desc_data = NULL ;
uint16_t len = 0;
switch(desc_type)
if ( control_state.request.bmRequestType_bit.direction == TUSB_DIR_IN )
{
case TUSB_DESC_DEVICE:
desc_data = (uint8_t const *) usbd_desc_set->device;
len = sizeof(tusb_desc_device_t);
break;
case TUSB_DESC_CONFIGURATION:
desc_data = (uint8_t const *) usbd_desc_set->config;
len = ((tusb_desc_configuration_t const*) desc_data)->wTotalLength;
break;
case TUSB_DESC_STRING:
// String Descriptor always uses the desc set from user
if ( desc_index < tud_desc_set.string_count )
{
desc_data = tud_desc_set.string_arr[desc_index];
TU_VERIFY( desc_data != NULL, 0 );
len = desc_data[0]; // first byte of descriptor is its size
}else
{
// out of range
/* The 0xee string is indeed a Microsoft USB extension.
* It can be used to tell Windows what driver it should use for the device !!!
*/
return 0;
}
break;
case TUSB_DESC_DEVICE_QUALIFIER:
// TODO If not highspeed capable stall this request otherwise
// return the descriptor that could work in highspeed
return 0;
break;
default: return 0;
ep_addr = EDPT_CTRL_IN;
memcpy(_usbd_ctrl_buf, control_state.buffer, xact_len);
}
TU_ASSERT( desc_data != NULL, 0);
// up to Host's length
len = tu_min16(p_request->wLength, len );
(*pp_buffer) = desc_data;
return len;
return dcd_edpt_xfer(rhport, ep_addr, _usbd_ctrl_buf, xact_len);
}
tusb_error_t controld_xfer_cb(uint8_t rhport, uint8_t edpt_addr, tusb_event_t event, uint32_t xferred_bytes) {
if (control_state.current_stage == CONTROL_STAGE_STATUS && xferred_bytes == 0) {
control_state.current_stage = CONTROL_STAGE_SETUP;
return TUSB_ERROR_NONE;
}
tusb_error_t error = TUSB_ERROR_NONE;
control_state.total_transferred += xferred_bytes;
tusb_control_request_t const *p_request = &control_state.current_request;
if (p_request->wLength == control_state.total_transferred || xferred_bytes < 64) {
control_state.current_stage = CONTROL_STAGE_STATUS;
dcd_control_status(rhport, p_request->bmRequestType_bit.direction);
// Do the user callback after queueing the STATUS packet because the callback could be slow.
if ( TUSB_REQ_RCPT_INTERFACE == p_request->bmRequestType_bit.recipient )
{
tud_control_interface_control_complete_cb(rhport, tu_u16_low(p_request->wIndex), p_request);
}
} else {
if (TUSB_REQ_RCPT_INTERFACE == p_request->bmRequestType_bit.recipient) {
error = tud_control_interface_control_cb(rhport, tu_u16_low(p_request->wIndex), p_request, control_state.total_transferred);
} else {
error = controld_process_control_request(rhport, p_request, control_state.total_transferred);
}
}
return error;
}
// This tracks the state of a control request.
tusb_error_t controld_process_setup_request(uint8_t rhport, tusb_control_request_t const * p_request) {
tusb_error_t error = TUSB_ERROR_NONE;
memcpy(&control_state.current_request, p_request, sizeof(tusb_control_request_t));
if (p_request->wLength == 0) {
control_state.current_stage = CONTROL_STAGE_STATUS;
} else {
control_state.current_stage = CONTROL_STAGE_DATA;
control_state.total_transferred = 0;
}
if ( TUSB_REQ_RCPT_INTERFACE == p_request->bmRequestType_bit.recipient )
{
error = tud_control_interface_control_cb(rhport, tu_u16_low(p_request->wIndex), p_request, 0);
} else {
error = controld_process_control_request(rhport, p_request, 0);
}
if (error != TUSB_ERROR_NONE) {
dcd_control_stall(rhport); // Stall errored requests
} else if (control_state.current_stage == CONTROL_STAGE_STATUS) {
dcd_control_status(rhport, p_request->bmRequestType_bit.direction);
}
return error;
}
// This handles the actual request and its response.
tusb_error_t controld_process_control_request(uint8_t rhport, tusb_control_request_t const * p_request, uint16_t bytes_already_sent)
// TODO may find a better way
void usbd_control_set_complete_callback( bool (*fp) (uint8_t, tusb_control_request_t const * ) )
{
tusb_error_t error = TUSB_ERROR_NONE;
uint8_t ep_addr = 0;
if (p_request->bmRequestType_bit.direction == TUSB_DIR_IN) {
ep_addr |= TUSB_DIR_IN_MASK;
control_state.complete_cb = fp;
}
bool usbd_control_xfer(uint8_t rhport, tusb_control_request_t const * request, void* buffer, uint16_t len)
{
control_state.request = (*request);
control_state.buffer = buffer;
control_state.total_len = tu_min16(len, request->wLength);
control_state.total_transferred = 0;
if ( buffer != NULL && len )
{
// Data stage
TU_ASSERT( start_control_data_xact(rhport) );
}else
{
// Status stage
TU_ASSERT( usbd_control_status(rhport, request) );
}
//------------- Standard Request e.g in enumeration -------------//
if( TUSB_REQ_RCPT_DEVICE == p_request->bmRequestType_bit.recipient &&
TUSB_REQ_TYPE_STANDARD == p_request->bmRequestType_bit.type ) {
switch (p_request->bRequest) {
case TUSB_REQ_GET_DESCRIPTOR: {
uint8_t const * buffer = NULL;
uint16_t const len = get_descriptor(rhport, p_request, &buffer);
return true;
}
if (len) {
uint16_t remaining_bytes = len - bytes_already_sent;
if (remaining_bytes > 64) {
remaining_bytes = 64;
}
memcpy(_shared_control_buffer, buffer + bytes_already_sent, remaining_bytes);
dcd_edpt_xfer(rhport, ep_addr, _shared_control_buffer, remaining_bytes);
} else {
return TUSB_ERROR_FAILED;
}
break;
}
case TUSB_REQ_GET_CONFIGURATION:
memcpy(_shared_control_buffer, &control_state.config, 1);
dcd_edpt_xfer(rhport, ep_addr, _shared_control_buffer, 1);
break;
case TUSB_REQ_SET_ADDRESS:
dcd_set_address(rhport, (uint8_t) p_request->wValue);
break;
case TUSB_REQ_SET_CONFIGURATION:
control_state.config = p_request->wValue;
tud_control_set_config_cb (rhport, control_state.config);
break;
default:
return TUSB_ERROR_FAILED;
}
} else if (p_request->bmRequestType_bit.recipient == TUSB_REQ_RCPT_ENDPOINT &&
p_request->bmRequestType_bit.type == TUSB_REQ_TYPE_STANDARD) {
//------------- Endpoint Request -------------//
switch (p_request->bRequest) {
case TUSB_REQ_GET_STATUS: {
uint16_t status = dcd_edpt_stalled(rhport, tu_u16_low(p_request->wIndex)) ? 0x0001 : 0x0000;
memcpy(_shared_control_buffer, &status, 2);
dcd_edpt_xfer(rhport, ep_addr, _shared_control_buffer, 2);
break;
}
case TUSB_REQ_CLEAR_FEATURE:
// only endpoint feature is halted/stalled
dcd_edpt_clear_stall(rhport, tu_u16_low(p_request->wIndex));
break;
case TUSB_REQ_SET_FEATURE:
// only endpoint feature is halted/stalled
dcd_edpt_stall(rhport, tu_u16_low(p_request->wIndex));
break;
default:
return TUSB_ERROR_FAILED;
}
} else {
//------------- Unsupported Request -------------//
return TUSB_ERROR_FAILED;
// callback when a transaction complete on DATA stage of control endpoint
tusb_error_t usbd_control_xfer_cb (uint8_t rhport, uint8_t ep_addr, tusb_event_t event, uint32_t xferred_bytes)
{
if ( control_state.request.bmRequestType_bit.direction == TUSB_DIR_OUT )
{
memcpy(control_state.buffer, _usbd_ctrl_buf, xferred_bytes);
}
return error;
control_state.total_transferred += xferred_bytes;
control_state.buffer += xferred_bytes;
if ( control_state.total_len == control_state.total_transferred || xferred_bytes < CFG_TUD_ENDOINT0_SIZE )
{
// DATA stage is complete
bool is_ok = true;
// invoke complete callback if set
// callback can still stall control in status phase e.g out data does not make sense
if ( control_state.complete_cb )
{
is_ok = control_state.complete_cb(rhport, &control_state.request);
}
if ( is_ok )
{
// Send status
TU_ASSERT( usbd_control_status(rhport, &control_state.request), TUSB_ERROR_FAILED );
}else
{
// stall due to callback
usbd_control_stall(rhport);
}
}
else
{
// More data to transfer
TU_ASSERT(start_control_data_xact(rhport), TUSB_ERROR_FAILED);
}
return TUSB_ERROR_NONE;
}
#endif

38
src/device/control.h
View File

@@ -48,44 +48,6 @@
#include "tusb.h"
typedef enum {
CONTROL_STAGE_SETUP, // Waiting for a setup token.
CONTROL_STAGE_DATA, // In the process of sending or receiving data.
CONTROL_STAGE_STATUS // In the process of transmitting the STATUS ZLP.
} control_stage_t;
typedef struct {
control_stage_t current_stage;
tusb_control_request_t current_request;
uint16_t total_transferred;
uint8_t config;
} control_t;
extern uint8_t _shared_control_buffer[64];
tusb_error_t controld_process_setup_request(uint8_t rhport, tusb_control_request_t const * const p_request);
// Callback when the configuration of the device is changed.
tusb_error_t tud_control_set_config_cb(uint8_t rhport, uint8_t config_number);
// Called when the DATA stage of a control transaction is complete.
void tud_control_interface_control_complete_cb(uint8_t rhport, uint8_t interface, tusb_control_request_t const * const p_request);
tusb_error_t tud_control_interface_control_cb(uint8_t rhport, uint8_t interface, tusb_control_request_t const * const p_request, uint16_t bytes_already_sent);
//--------------------------------------------------------------------+
// INTERNAL API
//--------------------------------------------------------------------+
tusb_error_t controld_open(uint8_t rhport, tusb_desc_interface_t const * p_interface_desc, uint16_t *p_length);
// This tracks the state of a control request.
tusb_error_t controld_process_setup_request(uint8_t rhport, tusb_control_request_t const * p_request);
// This handles the actual request and its response.
tusb_error_t controld_process_control_request(uint8_t rhport, tusb_control_request_t const * p_request, uint16_t bytes_already_sent);
tusb_error_t controld_xfer_cb(uint8_t rhport, uint8_t edpt_addr, tusb_event_t event, uint32_t xferred_bytes);
void controld_reset(uint8_t rhport);
#ifdef __cplusplus
}

4
src/device/dcd.h
View File

@@ -124,6 +124,10 @@ void dcd_event_xfer_complete (uint8_t rhport, uint8_t ep_addr, uint32_t xferred_
/*------------------------------------------------------------------*/
/* Endpoint API
* Note:
* - Address of control endpoint OUT is 0x00, In is 0x80
* - When stalling control endpoint both control OUT and IN must be stalled
* (according to USB spec, stalled control is only recovered with setup token)
*------------------------------------------------------------------*/
bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc);
bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes);

242
src/device/usbd.c
View File

@@ -68,11 +68,10 @@
typedef struct {
uint8_t config_num;
// map interface number to driver (0xff is invalid)
uint8_t itf2drv[16];
uint8_t itf2drv[16]; // map interface number to driver (0xff is invalid)
uint8_t ep2drv[2][8]; // map endpoint to driver ( 0xff is invalid )
// map endpoint to driver ( 0xff is invalid )
uint8_t ep2drv[2][8];
}usbd_device_t;
static usbd_device_t _usbd_dev;
@@ -94,9 +93,8 @@ typedef struct {
void (* init ) (void);
tusb_error_t (* open ) (uint8_t rhport, tusb_desc_interface_t const * desc_intf, uint16_t* p_length);
// Control request is called one or more times for a request and can queue multiple data packets.
tusb_error_t (* control_request ) (uint8_t rhport, tusb_control_request_t const *, uint16_t bytes_already_sent);
void (* control_request_complete ) (uint8_t rhport, tusb_control_request_t const *);
bool (* control_request ) (uint8_t rhport, tusb_control_request_t const * request);
bool (* control_request_complete ) (uint8_t rhport, tusb_control_request_t const * request);
tusb_error_t (* xfer_cb ) (uint8_t rhport, uint8_t ep_addr, tusb_event_t, uint32_t);
void (* sof ) (uint8_t rhport);
void (* reset ) (uint8_t);
@@ -171,9 +169,16 @@ OSAL_QUEUE_DEF(_usbd_qdef, CFG_TUD_TASK_QUEUE_SZ, dcd_event_t);
static osal_queue_t _usbd_q;
//--------------------------------------------------------------------+
// INTERNAL FUNCTION
// Prototypes
//--------------------------------------------------------------------+
static void mark_interface_endpoint(uint8_t const* p_desc, uint16_t desc_len, uint8_t driver_id);
static bool process_control_request(uint8_t rhport, tusb_control_request_t const * p_request);
static bool process_set_config(uint8_t rhport, uint8_t config_number);
static void const* get_descriptor(tusb_control_request_t const * p_request, uint16_t* desc_len);
void usbd_control_reset (uint8_t rhport);
tusb_error_t usbd_control_xfer_cb (uint8_t rhport, uint8_t ep_addr, tusb_event_t event, uint32_t xferred_bytes);
void usbd_control_set_complete_callback( bool (*fp) (uint8_t, tusb_control_request_t const * ) );
//--------------------------------------------------------------------+
// APPLICATION API
@@ -184,7 +189,7 @@ bool tud_mounted(void)
}
//--------------------------------------------------------------------+
// IMPLEMENTATION
// USBD Task
//--------------------------------------------------------------------+
tusb_error_t usbd_init (void)
{
@@ -214,7 +219,7 @@ static void usbd_reset(uint8_t rhport)
memset(_usbd_dev.itf2drv, 0xff, sizeof(_usbd_dev.itf2drv)); // invalid mapping
memset(_usbd_dev.ep2drv , 0xff, sizeof(_usbd_dev.ep2drv )); // invalid mapping
controld_reset(rhport);
usbd_control_reset(rhport);
for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++)
{
@@ -222,20 +227,24 @@ static void usbd_reset(uint8_t rhport)
}
}
// Main device task implementation
static void usbd_task_body(void)
{
dcd_event_t event;
// Loop until there is no more events in the queue
while (1)
{
dcd_event_t event;
if ( !osal_queue_receive(_usbd_q, &event) ) return;
switch ( event.event_id )
{
case DCD_EVENT_SETUP_RECEIVED:
// Setup tokens are unique to the Control endpoint so we delegate to it directly.
controld_process_setup_request(event.rhport, &event.setup_received);
// Process control request, if failed control endpoint is stalled
if ( !process_control_request(event.rhport, &event.setup_received) )
{
usbd_control_stall(event.rhport);
}
break;
case DCD_EVENT_XFER_COMPLETE:
@@ -245,8 +254,8 @@ static void usbd_task_body(void)
if ( 0 == edpt_number(ep_addr) )
{
// control transfer
controld_xfer_cb(event.rhport, ep_addr, event.xfer_complete.result, event.xfer_complete.len);
// control transfer DATA stage callback
usbd_control_xfer_cb(event.rhport, ep_addr, event.xfer_complete.result, event.xfer_complete.len);
}
else
{
@@ -312,66 +321,142 @@ void usbd_task( void* param)
#endif
}
void tud_control_interface_control_complete_cb(uint8_t rhport, uint8_t interface, tusb_control_request_t const * const p_request) {
if (_usbd_dev.itf2drv[ interface ] < USBD_CLASS_DRIVER_COUNT)
{
const usbd_class_driver_t *driver = &usbd_class_drivers[_usbd_dev.itf2drv[interface]];
if (driver->control_request_complete != NULL) {
driver->control_request_complete(rhport, p_request);
}
}
}
//--------------------------------------------------------------------+
// Control Request Parser & Handling
//--------------------------------------------------------------------+
tusb_error_t tud_control_interface_control_cb(uint8_t rhport, uint8_t interface, tusb_control_request_t const * const p_request, uint16_t bytes_already_sent) {
if (_usbd_dev.itf2drv[ interface ] < USBD_CLASS_DRIVER_COUNT)
// This handles the actual request and its response.
// return false will cause its caller to stall control endpoint
static bool process_control_request(uint8_t rhport, tusb_control_request_t const * p_request)
{
usbd_control_set_complete_callback(NULL);
if ( TUSB_REQ_RCPT_DEVICE == p_request->bmRequestType_bit.recipient &&
TUSB_REQ_TYPE_STANDARD == p_request->bmRequestType_bit.type )
{
//------------- Standard Device Requests e.g in enumeration -------------//
void* data_buf = NULL;
uint16_t data_len = 0;
switch ( p_request->bRequest )
{
return usbd_class_drivers[_usbd_dev.itf2drv[interface]].control_request(rhport, p_request, bytes_already_sent);
case TUSB_REQ_SET_ADDRESS:
dcd_set_address(rhport, (uint8_t) p_request->wValue);
break;
case TUSB_REQ_GET_CONFIGURATION:
data_buf = &_usbd_dev.config_num;
data_len = 1;
break;
case TUSB_REQ_SET_CONFIGURATION:
{
uint8_t const config = (uint8_t) p_request->wValue;
dcd_set_config(rhport, config);
_usbd_dev.config_num = config;
TU_ASSERT( TUSB_ERROR_NONE == process_set_config(rhport, config) );
}
break;
case TUSB_REQ_GET_DESCRIPTOR:
data_buf = (void*) get_descriptor(p_request, &data_len);
if ( data_buf == NULL || data_len == 0 ) return false;
break;
default: return false;
}
return TUSB_ERROR_FAILED;
usbd_control_xfer(rhport, p_request, data_buf, data_len);
}
else if ( TUSB_REQ_RCPT_INTERFACE == p_request->bmRequestType_bit.recipient )
{
//------------- Class/Interface Specific Request -------------//
uint8_t const itf = tu_u16_low(p_request->wIndex);
uint8_t const drvid = _usbd_dev.itf2drv[ itf ];
TU_VERIFY (drvid < USBD_CLASS_DRIVER_COUNT );
usbd_control_set_complete_callback(usbd_class_drivers[drvid].control_request_complete );
// control endpoint will be stalled if driver return false
return usbd_class_drivers[drvid].control_request(rhport, p_request);
}
else if ( p_request->bmRequestType_bit.recipient == TUSB_REQ_RCPT_ENDPOINT &&
p_request->bmRequestType_bit.type == TUSB_REQ_TYPE_STANDARD )
{
//------------- Endpoint Request -------------//
switch ( p_request->bRequest )
{
case TUSB_REQ_GET_STATUS:
{
uint16_t status = dcd_edpt_stalled(rhport, tu_u16_low(p_request->wIndex)) ? 0x0001 : 0x0000;
usbd_control_xfer(rhport, p_request, &status, 2);
}
break;
case TUSB_REQ_CLEAR_FEATURE:
// only endpoint feature is halted/stalled
dcd_edpt_clear_stall(rhport, tu_u16_low(p_request->wIndex));
usbd_control_status(rhport, p_request);
break;
case TUSB_REQ_SET_FEATURE:
// only endpoint feature is halted/stalled
dcd_edpt_stall(rhport, tu_u16_low(p_request->wIndex));
usbd_control_status(rhport, p_request);
break;
default: return false;
}
}
else
{
//------------- Unsupported Request -------------//
return false;
}
return true;
}
// Process Set Configure Request
// TODO Host (windows) can get HID report descriptor before set configured
// may need to open interface before set configured
tusb_error_t tud_control_set_config_cb(uint8_t rhport, uint8_t config_number)
// This function parse configuration descriptor & open drivers accordingly
static bool process_set_config(uint8_t rhport, uint8_t config_number)
{
dcd_set_config(rhport, config_number);
_usbd_dev.config_num = config_number;
//------------- parse configuration & open drivers -------------//
uint8_t const * desc_cfg = (uint8_t const *) usbd_desc_set->config;
TU_ASSERT(desc_cfg != NULL, TUSB_ERROR_DESCRIPTOR_CORRUPTED);
TU_ASSERT(desc_cfg != NULL);
uint8_t const * p_desc = desc_cfg + sizeof(tusb_desc_configuration_t);
uint16_t const cfg_len = ((tusb_desc_configuration_t*)desc_cfg)->wTotalLength;
while( p_desc < desc_cfg + cfg_len )
{
// Each interface always starts with Interface or Association descriptor
if ( TUSB_DESC_INTERFACE_ASSOCIATION == descriptor_type(p_desc) )
{
p_desc = descriptor_next(p_desc); // ignore Interface Association
}else
{
TU_ASSERT( TUSB_DESC_INTERFACE == descriptor_type(p_desc), TUSB_ERROR_NOT_SUPPORTED_YET );
TU_ASSERT( TUSB_DESC_INTERFACE == descriptor_type(p_desc) );
tusb_desc_interface_t* p_desc_itf = (tusb_desc_interface_t*) p_desc;
uint8_t const class_code = p_desc_itf->bInterfaceClass;
tusb_desc_interface_t* desc_itf = (tusb_desc_interface_t*) p_desc;
// Check if class is supported
uint8_t drv_id;
for (drv_id = 0; drv_id < USBD_CLASS_DRIVER_COUNT; drv_id++)
{
if ( usbd_class_drivers[drv_id].class_code == class_code ) break;
if ( usbd_class_drivers[drv_id].class_code == desc_itf->bInterfaceClass ) break;
}
TU_ASSERT( drv_id < USBD_CLASS_DRIVER_COUNT, TUSB_ERROR_NOT_SUPPORTED_YET );
TU_ASSERT( drv_id < USBD_CLASS_DRIVER_COUNT ); // unsupported class
// Interface number must not be used
TU_ASSERT( 0xff == _usbd_dev.itf2drv[p_desc_itf->bInterfaceNumber], TUSB_ERROR_FAILED);
_usbd_dev.itf2drv[p_desc_itf->bInterfaceNumber] = drv_id;
// Interface number must not be used already TODO alternate interface
TU_ASSERT( 0xff == _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] );
_usbd_dev.itf2drv[desc_itf->bInterfaceNumber] = drv_id;
uint16_t len=0;
TU_ASSERT_ERR( usbd_class_drivers[drv_id].open( rhport, p_desc_itf, &len ) );
TU_ASSERT( len >= sizeof(tusb_desc_interface_t), TUSB_ERROR_FAILED );
TU_ASSERT_ERR( usbd_class_drivers[drv_id].open( rhport, desc_itf, &len ), false );
TU_ASSERT( len >= sizeof(tusb_desc_interface_t) );
mark_interface_endpoint(p_desc, len, drv_id);
@@ -404,8 +489,62 @@ static void mark_interface_endpoint(uint8_t const* p_desc, uint16_t desc_len, ui
}
}
// return descriptor's buffer and update desc_len
static void const* get_descriptor(tusb_control_request_t const * p_request, uint16_t* desc_len)
{
tusb_desc_type_t const desc_type = (tusb_desc_type_t) tu_u16_high(p_request->wValue);
uint8_t const desc_index = tu_u16_low( p_request->wValue );
uint8_t const * desc_data = NULL;
uint16_t len = 0;
*desc_len = 0;
switch(desc_type)
{
case TUSB_DESC_DEVICE:
desc_data = (uint8_t const *) usbd_desc_set->device;
len = sizeof(tusb_desc_device_t);
break;
case TUSB_DESC_CONFIGURATION:
desc_data = (uint8_t const *) usbd_desc_set->config;
len = ((tusb_desc_configuration_t const*) desc_data)->wTotalLength;
break;
case TUSB_DESC_STRING:
// String Descriptor always uses the desc set from user
if ( desc_index < tud_desc_set.string_count )
{
desc_data = tud_desc_set.string_arr[desc_index];
TU_VERIFY( desc_data != NULL, NULL );
len = desc_data[0]; // first byte of descriptor is its size
}else
{
// out of range
/* The 0xEE index string is a Microsoft USB extension.
* It can be used to tell Windows what driver it should use for the device !!!
*/
return NULL;
}
break;
case TUSB_DESC_DEVICE_QUALIFIER:
// TODO If not highspeed capable stall this request otherwise
// return the descriptor that could work in highspeed
return NULL;
break;
default: return NULL;
}
*desc_len = len;
return desc_data;
}
//--------------------------------------------------------------------+
// USBD-DCD Callback API
// DCD Event Handler
//--------------------------------------------------------------------+
void dcd_event_handler(dcd_event_t const * event, bool in_isr)
{
@@ -430,6 +569,9 @@ void dcd_event_handler(dcd_event_t const * event, bool in_isr)
break;
case DCD_EVENT_XFER_COMPLETE:
// skip zero-length control status complete event, should dcd notifies us.
if ( 0 == edpt_number(event->xfer_complete.ep_addr) && event->xfer_complete.len == 0) break;
osal_queue_send(_usbd_q, event, in_isr);
TU_ASSERT(event->xfer_complete.result == DCD_XFER_SUCCESS,);
break;
@@ -438,8 +580,6 @@ void dcd_event_handler(dcd_event_t const * event, bool in_isr)
}
}
void dcd_event_handler(dcd_event_t const * event, bool in_isr);
// helper to send bus signal event
void dcd_event_bus_signal (uint8_t rhport, dcd_eventid_t eid, bool in_isr)
{

17
src/device/usbd_pvt.h
View File

@@ -54,15 +54,24 @@ extern tud_desc_set_t const* usbd_desc_set;
tusb_error_t usbd_init (void);
void usbd_task (void* param);
// Carry out Data and Status stage of control transfer
// - If len = 0, it is equivalent to sending status only
// - If len > wLength : it will be truncated
bool usbd_control_xfer(uint8_t rhport, tusb_control_request_t const * request, void* buffer, uint16_t len);
// Send STATUS (zero length) packet
bool usbd_control_status(uint8_t rhport, tusb_control_request_t const * request);
// Stall control endpoint until new setup packet arrived
void usbd_control_stall(uint8_t rhport);
/*------------------------------------------------------------------*/
/* Endpoint helper
/* Helper
*------------------------------------------------------------------*/
// helper to parse an pair of In and Out endpoint descriptors. They must be consecutive
tusb_error_t usbd_open_edpt_pair(uint8_t rhport, tusb_desc_endpoint_t const* p_desc_ep, uint8_t xfer_type, uint8_t* ep_out, uint8_t* ep_in);
/*------------------------------------------------------------------*/
/* Other Helpers
*------------------------------------------------------------------*/
void usbd_defer_func( osal_task_func_t func, void* param, bool in_isr );