From c14c0cfc9fec9101b63df682c5fa5ac0576de0f8 Mon Sep 17 00:00:00 2001 From: hathach Date: Wed, 29 Apr 2020 10:49:58 +0700 Subject: [PATCH] support class drivers implemented by application --- src/device/usbd.c | 116 +++++++++++++++++++++++------------------- src/device/usbd_pvt.h | 23 +++++++++ 2 files changed, 88 insertions(+), 51 deletions(-) diff --git a/src/device/usbd.c b/src/device/usbd.c index 1f660f0f2..432786140 100644 --- a/src/device/usbd.c +++ b/src/device/usbd.c @@ -79,21 +79,7 @@ enum { DRVID_INVALID = 0xFFu }; #define DRIVER_NAME(_name) #endif -typedef struct -{ - #if CFG_TUSB_DEBUG >= 2 - char const* name; - #endif - - void (* init ) (void); - void (* reset ) (uint8_t rhport); - bool (* open ) (uint8_t rhport, tusb_desc_interface_t const * desc_intf, uint16_t* p_length); - bool (* control_request ) (uint8_t rhport, tusb_control_request_t const * request); - bool (* control_complete ) (uint8_t rhport, tusb_control_request_t const * request); - bool (* xfer_cb ) (uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes); - void (* sof ) (uint8_t rhport); /* optional */ -} usbd_class_driver_t; - +// Built-in class drivers static usbd_class_driver_t const _usbd_driver[] = { #if CFG_TUD_CDC @@ -203,6 +189,29 @@ static usbd_class_driver_t const _usbd_driver[] = enum { USBD_CLASS_DRIVER_COUNT = TU_ARRAY_SIZE(_usbd_driver) }; +// Additional class drivers implemented by application +static usbd_class_driver_t const * _app_driver = NULL; +static uint8_t _app_driver_count = 0; + +// virtually joins built-in and application drivers together +// All drivers = built-in + application +static inline usbd_class_driver_t const * get_driver(uint8_t drvid) +{ + // Built-in drivers + if (drvid < USBD_CLASS_DRIVER_COUNT) return &_usbd_driver[drvid]; + + // App drivers + if ( usbd_app_driver_get_cb ) + { + drvid -= USBD_CLASS_DRIVER_COUNT; + if ( drvid < _app_driver_count ) return &_app_driver[drvid]; + } + + return NULL; +} + +#define TOTAL_DRIVER_COUNT (USBD_CLASS_DRIVER_COUNT+_app_driver_count) + //--------------------------------------------------------------------+ // DCD Event //--------------------------------------------------------------------+ @@ -263,11 +272,12 @@ static char const* const _tusb_std_request_str[] = // for usbd_control to print the name of control complete driver void usbd_driver_print_control_complete_name(bool (*control_complete) (uint8_t, tusb_control_request_t const * )) { - for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++) + for (uint8_t i = 0; i < TOTAL_DRIVER_COUNT; i++) { - if (_usbd_driver[i].control_complete == control_complete ) + usbd_class_driver_t const * driver = get_driver(i); + if ( driver->control_complete == control_complete ) { - TU_LOG2(" %s control complete\r\n", _usbd_driver[i].name); + TU_LOG2(" %s control complete\r\n", driver->name); return; } } @@ -309,11 +319,18 @@ bool tud_init (void) _usbd_q = osal_queue_create(&_usbd_qdef); TU_ASSERT(_usbd_q != NULL); - // Init class drivers - for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++) + // Get application driver if available + if ( usbd_app_driver_get_cb ) { - TU_LOG2("%s init\r\n", _usbd_driver[i].name); - _usbd_driver[i].init(); + _app_driver = usbd_app_driver_get_cb(&_app_driver_count); + } + + // Init class drivers + for (uint8_t i = 0; i < TOTAL_DRIVER_COUNT; i++) + { + usbd_class_driver_t const * driver = get_driver(i); + TU_LOG2("%s init\r\n", driver->name); + driver->init(); } // Init device controller driver @@ -333,9 +350,9 @@ static void usbd_reset(uint8_t rhport) usbd_control_reset(); - for (uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++) + for ( uint8_t i = 0; i < TOTAL_DRIVER_COUNT; i++ ) { - if ( _usbd_driver[i].reset ) _usbd_driver[i].reset( rhport ); + get_driver(i)->reset(rhport); } } @@ -420,11 +437,11 @@ void tud_task (void) } else { - uint8_t const drv_id = _usbd_dev.ep2drv[epnum][ep_dir]; - TU_ASSERT(drv_id < USBD_CLASS_DRIVER_COUNT,); + usbd_class_driver_t const * driver = get_driver( _usbd_dev.ep2drv[epnum][ep_dir] ); + TU_ASSERT(driver, ); - TU_LOG2(" %s xfer callback\r\n", _usbd_driver[drv_id].name); - _usbd_driver[drv_id].xfer_cb(event.rhport, ep_addr, event.xfer_complete.result, event.xfer_complete.len); + TU_LOG2(" %s xfer callback\r\n", driver->name); + driver->xfer_cb(event.rhport, ep_addr, event.xfer_complete.result, event.xfer_complete.len); } } break; @@ -438,12 +455,10 @@ void tud_task (void) break; case DCD_EVENT_SOF: - for ( uint8_t i = 0; i < USBD_CLASS_DRIVER_COUNT; i++ ) + for ( uint8_t i = 0; i < TOTAL_DRIVER_COUNT; i++ ) { - if ( _usbd_driver[i].sof ) - { - _usbd_driver[i].sof(event.rhport); - } + usbd_class_driver_t const * driver = get_driver(i); + if ( driver->sof ) driver->sof(event.rhport); } break; @@ -463,11 +478,11 @@ void tud_task (void) //--------------------------------------------------------------------+ // Helper to invoke class driver control request handler -static bool invoke_class_control(uint8_t rhport, uint8_t drvid, tusb_control_request_t const * request) +static bool invoke_class_control(uint8_t rhport, usbd_class_driver_t const * driver, tusb_control_request_t const * request) { - usbd_control_set_complete_callback(_usbd_driver[drvid].control_complete); - TU_LOG2(" %s control request\r\n", _usbd_driver[drvid].name); - return _usbd_driver[drvid].control_request(rhport, request); + usbd_control_set_complete_callback(driver->control_complete); + TU_LOG2(" %s control request\r\n", driver->name); + return driver->control_request(rhport, request); } // This handles the actual request and its response. @@ -580,12 +595,12 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const uint8_t const itf = tu_u16_low(p_request->wIndex); TU_VERIFY(itf < TU_ARRAY_SIZE(_usbd_dev.itf2drv)); - uint8_t const drvid = _usbd_dev.itf2drv[itf]; - TU_VERIFY(drvid < USBD_CLASS_DRIVER_COUNT); + usbd_class_driver_t const * driver = get_driver(_usbd_dev.itf2drv[itf]); + TU_VERIFY(driver); // all requests to Interface (STD or Class) is forwarded to class driver. // notable requests are: GET HID REPORT DESCRIPTOR, SET_INTERFACE, GET_INTERFACE - if ( !invoke_class_control(rhport, drvid, p_request) ) + if ( !invoke_class_control(rhport, driver, p_request) ) { // For GET_INTERFACE, it is mandatory to respond even if the class // driver doesn't use alternate settings. @@ -607,8 +622,6 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const TU_ASSERT(ep_num < TU_ARRAY_SIZE(_usbd_dev.ep2drv) ); - uint8_t const drvid = _usbd_dev.ep2drv[ep_num][ep_dir]; - bool ret = false; // Handle STD request to endpoint @@ -647,16 +660,17 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const } } - if (drvid < 0xFF) { - TU_ASSERT(drvid < USBD_CLASS_DRIVER_COUNT); - + usbd_class_driver_t const * driver = get_driver(_usbd_dev.ep2drv[ep_num][ep_dir]); + + if (driver) + { // Some classes such as USBTMC needs to clear/re-init its buffer when receiving CLEAR_FEATURE request // We will forward all request targeted endpoint to class drivers after // - For class-type requests: driver is fully responsible to reply to host // - For std-type requests : driver init/re-init internal variable/buffer only, and // must not call tud_control_status(), driver's return value will have no effect. // EP state has already affected (stalled/cleared) - if ( invoke_class_control(rhport, drvid, p_request) ) ret = true; + if ( invoke_class_control(rhport, driver, p_request) ) ret = true; } if ( TUSB_REQ_TYPE_STANDARD == p_request->bmRequestType_bit.type ) @@ -708,17 +722,17 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num) uint8_t drv_id; uint16_t drv_len; - for (drv_id = 0; drv_id < USBD_CLASS_DRIVER_COUNT; drv_id++) + for (drv_id = 0; drv_id < TOTAL_DRIVER_COUNT; drv_id++) { - usbd_class_driver_t const *driver = &_usbd_driver[drv_id]; + usbd_class_driver_t const *driver = get_driver(drv_id); drv_len = 0; if ( driver->open(rhport, desc_itf, &drv_len) ) { // Interface number must not be used already - TU_ASSERT( DRVID_INVALID == _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] ); + TU_ASSERT(DRVID_INVALID == _usbd_dev.itf2drv[desc_itf->bInterfaceNumber]); - TU_LOG2(" %s opened\r\n", _usbd_driver[drv_id].name); + TU_LOG2(" %s opened\r\n", driver->name); _usbd_dev.itf2drv[desc_itf->bInterfaceNumber] = drv_id; // If IAD exist, assign all interfaces to the same driver @@ -741,7 +755,7 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num) } // Assert if cannot find supported driver - TU_ASSERT( drv_id < USBD_CLASS_DRIVER_COUNT && drv_len >= sizeof(tusb_desc_interface_t) ); + TU_ASSERT( drv_id < TOTAL_DRIVER_COUNT && drv_len >= sizeof(tusb_desc_interface_t) ); mark_interface_endpoint(_usbd_dev.ep2drv, p_desc, drv_len, drv_id); // TODO refactor diff --git a/src/device/usbd_pvt.h b/src/device/usbd_pvt.h index 48188ec99..d6eb289c1 100644 --- a/src/device/usbd_pvt.h +++ b/src/device/usbd_pvt.h @@ -33,6 +33,29 @@ extern "C" { #endif +//--------------------------------------------------------------------+ +// Class Drivers +//--------------------------------------------------------------------+ + +typedef struct +{ +#if CFG_TUSB_DEBUG >= 2 + char const* name; +#endif + + void (* init ) (void); + void (* reset ) (uint8_t rhport); + bool (* open ) (uint8_t rhport, tusb_desc_interface_t const * desc_intf, uint16_t* p_length); + bool (* control_request ) (uint8_t rhport, tusb_control_request_t const * request); + bool (* control_complete ) (uint8_t rhport, tusb_control_request_t const * request); + bool (* xfer_cb ) (uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes); + void (* sof ) (uint8_t rhport); /* optional */ +} usbd_class_driver_t; + +// Invoked when initializing device stack to get additional class drivers. +// Can optionally implemented by application to extend/overwrite class driver support. +usbd_class_driver_t const* usbd_app_driver_get_cb(uint8_t* driver_count) TU_ATTR_WEAK; + //--------------------------------------------------------------------+ // USBD Endpoint API //--------------------------------------------------------------------+