//! host_disable_all_pipes //! //! This function disables all pipes for the host controller. //! Useful to execute upon disconnection. //! //! @return Void //! void host_disable_all_pipes(void) { #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE Bool sav_glob_int_en; #endif U8 p; #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE if ((sav_glob_int_en = Is_global_interrupt_enabled())) Disable_global_interrupt(); #endif for (p = 0; p < MAX_PEP_NB; p++) { Host_disable_pipe_interrupt(p); Host_reset_pipe(p); Host_unallocate_memory(p); Host_disable_pipe(p); } #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE (void)Is_host_pipe_enabled(MAX_PEP_NB - 1); if (sav_glob_int_en) Enable_global_interrupt(); #endif }
//! host_disable_all_pipes //! //! This function disables all pipes for the host controller. //! Useful to execute upon disconnection. //! //! @return Void //! void host_disable_all_pipes(void) { #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE Bool sav_glob_int_en; #endif U8 p; #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE // Disable global interrupts if ((sav_glob_int_en = Is_global_interrupt_enabled())) Disable_global_interrupt(); #endif for (p = 0; p < MAX_PEP_NB; p++) { // Disable the pipe <p> (disable interrupt, free memory, reset pipe, ...) Host_disable_pipe_interrupt(p); Host_reset_pipe(p); Host_unallocate_memory(p); Host_disable_pipe(p); } #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE (void)Is_host_pipe_enabled(MAX_PEP_NB - 1); // Restore the global interrupts to the initial state if (sav_glob_int_en) Enable_global_interrupt(); #endif }
//! This function checks if the device class is supported. //! The function looks in all interfaces declared in the received descriptors if //! one of them matches an entry of the CLASS/SUB_CLASS/PROTOCOL table. //! If HOST_AUTO_CFG_ENDPOINT is enabled, a pipe is configured for each endpoint //! of supported interfaces. //! //! @return bool: Status //! bool host_check_class(void) { uint8_t *descriptor, *conf_end; uint8_t device_class, device_subclass, device_protocol; uint8_t c; #if HOST_AUTO_CFG_ENDPOINT == ENABLE uint8_t nb_endpoint_to_configure = 0; uint8_t ep_index = 0; uint8_t physical_pipe = P_1; // P_1 because physical pipe 0 is reserved for control uint16_t ep_size; // By default, the host is configured when returning Host_set_configured(); #endif // First, assume no interface is supported nb_interface_supported = 0; // Check if configuration descriptor if (data_stage[OFFSET_FIELD_DESCRIPTOR_TYPE] != CONFIGURATION_DESCRIPTOR) return false; bmattributes = data_stage[OFFSET_FIELD_BMATTRIBUTES]; maxpower = data_stage[OFFSET_FIELD_MAXPOWER]; conf_end = data_stage + min(usb_format_usb_to_mcu_data(16, *(uint16_t *)(data_stage + OFFSET_FIELD_TOTAL_LENGTH)), SIZEOF_DATA_STAGE - OFFSET_FIELD_PROTOCOL); // Look in all interfaces declared in the configuration for (descriptor = data_stage + data_stage[OFFSET_DESCRIPTOR_LENGTH]; descriptor < conf_end; descriptor += descriptor[OFFSET_DESCRIPTOR_LENGTH]) { // Find next interface descriptor switch (descriptor[OFFSET_FIELD_DESCRIPTOR_TYPE]) { case INTERFACE_DESCRIPTOR: // Check the number of supported interfaces does not exceed the maximum if (nb_interface_supported >= MAX_INTERFACE_SUPPORTED) return true; #if HOST_AUTO_CFG_ENDPOINT == ENABLE // If there are still endpoints to configure although a new interface descriptor has been found if (nb_endpoint_to_configure) { // Mark the host as not configured Host_clear_configured(); // Reset the number of endpoints to configure nb_endpoint_to_configure = 0; } #endif // Found an interface descriptor // Get characteristics of this interface device_class = descriptor[OFFSET_FIELD_CLASS]; device_subclass = descriptor[OFFSET_FIELD_SUB_CLASS]; device_protocol = descriptor[OFFSET_FIELD_PROTOCOL]; // Look in registered class table for match for (c = 0; c < REG_CLASS_CNT; c += 3) { if (registered_class[c] == device_class && // Class is correct registered_class[c + 1] == device_subclass && // Subclass is correct registered_class[c + 2] == device_protocol) // Protocol is correct { // Store this interface as supported interface // Memorize its interface nb interface_supported[nb_interface_supported].interface_nb = descriptor[OFFSET_FIELD_INTERFACE_NB]; // its alternate setting interface_supported[nb_interface_supported].altset_nb = descriptor[OFFSET_FIELD_ALT]; // its USB class interface_supported[nb_interface_supported].uclass = device_class; // its USB subclass interface_supported[nb_interface_supported].subclass = device_subclass; // its USB protocol interface_supported[nb_interface_supported].protocol = device_protocol; // the number of endpoints associated with this interface #if HOST_AUTO_CFG_ENDPOINT == ENABLE ep_index = 0; nb_endpoint_to_configure = #endif interface_supported[nb_interface_supported].nb_ep = min(descriptor[OFFSET_FIELD_NB_OF_EP], MAX_EP_PER_INTERFACE); // Update the number of supported interfaces nb_interface_supported++; // Class/subclass/protocol is registered, so look for next interface descriptor break; } } break; #if HOST_AUTO_CFG_ENDPOINT == ENABLE case ENDPOINT_DESCRIPTOR: // If there are still endpoints to configure while there are free pipes if (physical_pipe < MAX_PEP_NB && nb_endpoint_to_configure) { nb_endpoint_to_configure--; // Reconfigure the new physical pipe to get rid of any previous configuration #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE cpu_irq_disable(); #endif Host_disable_pipe(physical_pipe); #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE (void)Is_host_pipe_enabled(physical_pipe); cpu_irq_enable(); #endif Host_unallocate_memory(physical_pipe); Host_enable_pipe(physical_pipe); // Fix HW, set freq at 0 in case of no interrupt endpoint if( TYPE_INTERRUPT != descriptor[OFFSET_FIELD_EP_TYPE] ) descriptor[OFFSET_FIELD_EP_INTERVAL] = 0; ep_size = descriptor[OFFSET_FIELD_EP_SIZE] | descriptor[OFFSET_FIELD_EP_SIZE + 1] << 8; #if BOARD != EVK1104 if (ep_size <= 64) { #endif // Build the pipe configuration according to the endpoint descriptor fields received (void)Host_configure_pipe( physical_pipe, // Pipe nb in USB interface descriptor[OFFSET_FIELD_EP_INTERVAL], // Interrupt period (for interrupt pipe) Get_desc_ep_nbr(descriptor[OFFSET_FIELD_EP_ADDR]), // Pipe endpoint number descriptor[OFFSET_FIELD_EP_TYPE], // Pipe type (isochronous/bulk/interrupt) Get_pipe_token(descriptor[OFFSET_FIELD_EP_ADDR]), // Pipe token (IN/OUT) ep_size, // Pipe size (descriptor[OFFSET_FIELD_EP_TYPE] == TYPE_BULK) ? SINGLE_BANK : DOUBLE_BANK // Number of banks to allocate for pipe ); // Update endpoint pipe table in supported interface structure interface_supported[nb_interface_supported - 1].ep_pipe[ep_index++] = physical_pipe++; } #if BOARD != EVK1104 else { // Build the pipe configuration according to the endpoint descriptor fields received (void)Host_configure_pipe( MAX_PEP_NB - 1, // Pipe nb in USB interface descriptor[OFFSET_FIELD_EP_INTERVAL], // Interrupt period (for interrupt pipe) Get_desc_ep_nbr(descriptor[OFFSET_FIELD_EP_ADDR]), // Pipe endpoint number descriptor[OFFSET_FIELD_EP_TYPE], // Pipe type (isochronous/bulk/interrupt) Get_pipe_token(descriptor[OFFSET_FIELD_EP_ADDR]), // Pipe token (IN/OUT) ep_size, // Pipe size (descriptor[OFFSET_FIELD_EP_TYPE] == TYPE_BULK) ? SINGLE_BANK : DOUBLE_BANK // Number of banks to allocate for pipe ); // Update endpoint pipe table in supported interface structure interface_supported[nb_interface_supported - 1].ep_pipe[ep_index++] = MAX_PEP_NB - 1; } } #endif break; #endif } // Call user callback to look more deeply into the configuration descriptor Host_user_check_class_action(descriptor); } #if HOST_AUTO_CFG_ENDPOINT == ENABLE // If there are still endpoints to configure although all descriptors have been parsed if (nb_endpoint_to_configure) { // Mark the host as not configured Host_clear_configured(); } #endif return (nb_interface_supported > 0); }