242 lines
9.2 KiB
C
242 lines
9.2 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2021 Dan Halbert for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/gc.h"
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#include "py/obj.h"
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "py/objtuple.h"
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#include "shared-bindings/usb_cdc/__init__.h"
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#include "shared-bindings/usb_cdc/Serial.h"
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#include "supervisor/usb.h"
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#include "tusb.h"
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#if CFG_TUD_CDC != 2
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#error CFG_TUD_CDC must be exactly 2
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#endif
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static const uint8_t usb_cdc_descriptor_template[] = {
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// CDC IAD Descriptor
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0x08, // 0 bLength
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0x0B, // 1 bDescriptorType: IAD Descriptor
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0xFF, // 2 bFirstInterface [SET AT RUNTIME]
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#define CDC_FIRST_INTERFACE_INDEX 2
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0x02, // 3 bInterfaceCount: 2
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0x02, // 4 bFunctionClass: COMM
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0x02, // 5 bFunctionSubclass: ACM
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0x00, // 6 bFunctionProtocol: NONE
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0x00, // 7 iFunction
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// CDC Comm Interface Descriptor
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0x09, // 8 bLength
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0x04, // 9 bDescriptorType (Interface)
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0xFF, // 10 bInterfaceNumber [SET AT RUNTIME]
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#define CDC_COMM_INTERFACE_INDEX 10
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0x00, // 11 bAlternateSetting
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0x01, // 12 bNumEndpoints 1
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0x02, // 13 bInterfaceClass: COMM
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0x02, // 14 bInterfaceSubClass: ACM
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0x00, // 15 bInterfaceProtocol: NONE
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0xFF, // 16 iInterface (String Index)
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#define CDC_COMM_INTERFACE_STRING_INDEX 16
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// CDC Header Descriptor
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0x05, // 17 bLength
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0x24, // 18 bDescriptorType: CLASS SPECIFIC INTERFACE
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0x00, // 19 bDescriptorSubtype: NONE
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0x10, 0x01, // 20,21 bcdCDC: 1.10
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// CDC Call Management Descriptor
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0x05, // 22 bLength
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0x24, // 23 bDescriptorType: CLASS SPECIFIC INTERFACE
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0x01, // 24 bDescriptorSubtype: CALL MANAGEMENT
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0x01, // 25 bmCapabilities
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0xFF, // 26 bDataInterface [SET AT RUNTIME]
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#define CDC_CALL_MANAGEMENT_DATA_INTERFACE_INDEX 26
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// CDC Abstract Control Management Descriptor
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0x04, // 27 bLength
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0x24, // 28 bDescriptorType: CLASS SPECIFIC INTERFACE
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0x02, // 29 bDescriptorSubtype: ABSTRACT CONTROL MANAGEMENT
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0x02, // 30 bmCapabilities
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// CDC Union Descriptor
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0x05, // 31 bLength
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0x24, // 32 bDescriptorType: CLASS SPECIFIC INTERFACE
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0x06, // 33 bDescriptorSubtype: CDC
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0xFF, // 34 bMasterInterface [SET AT RUNTIME]
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#define CDC_UNION_MASTER_INTERFACE_INDEX 34
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0xFF, // 35 bSlaveInterface_list (1 item)
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#define CDC_UNION_SLAVE_INTERFACE_INDEX 35
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// CDC Control IN Endpoint Descriptor
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0x07, // 36 bLength
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0x05, // 37 bDescriptorType (Endpoint)
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0xFF, // 38 bEndpointAddress (IN/D2H) [SET AT RUNTIME: 0x80 | number]
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#define CDC_CONTROL_IN_ENDPOINT_INDEX 38
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0x03, // 39 bmAttributes (Interrupt)
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0x40, 0x00, // 40, 41 wMaxPacketSize 64
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0x10, // 42 bInterval 16 (unit depends on device speed)
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// CDC Data Interface
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0x09, // 43 bLength
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0x04, // 44 bDescriptorType (Interface)
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0xFF, // 45 bInterfaceNumber [SET AT RUNTIME]
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#define CDC_DATA_INTERFACE_INDEX 45
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0x00, // 46 bAlternateSetting
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0x02, // 47 bNumEndpoints 2
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0x0A, // 48 bInterfaceClass: DATA
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0x00, // 49 bInterfaceSubClass: NONE
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0x00, // 50 bInterfaceProtocol
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0x05, // 51 iInterface (String Index)
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#define CDC_DATA_INTERFACE_STRING_INDEX 51
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// CDC Data OUT Endpoint Descriptor
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0x07, // 52 bLength
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0x05, // 53 bDescriptorType (Endpoint)
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0xFF, // 54 bEndpointAddress (OUT/H2D) [SET AT RUNTIME]
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#define CDC_DATA_OUT_ENDPOINT_INDEX 54
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0x02, // 55 bmAttributes (Bulk)
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0x40, 0x00, // 56,57 wMaxPacketSize 64
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0x00, // 58 bInterval 0 (unit depends on device speed)
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// CDC Data IN Endpoint Descriptor
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0x07, // 59 bLength
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0x05, // 60 bDescriptorType (Endpoint)
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0xFF, // 61 bEndpointAddress (IN/D2H) [SET AT RUNTIME: 0x80 | number]
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#define CDC_DATA_IN_ENDPOINT_INDEX 61
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0x02, // 62 bmAttributes (Bulk)
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0x40, 0x00, // 63,64 wMaxPacketSize 64
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0x00, // 65 bInterval 0 (unit depends on device speed)
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};
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static const char console_cdc_comm_interface_name[] = USB_INTERFACE_NAME " CDC control";
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static const char data_cdc_comm_interface_name[] = USB_INTERFACE_NAME " CDC2 control";
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static const char console_cdc_data_interface_name[] = USB_INTERFACE_NAME " CDC data";
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static const char data_cdc_data_interface_name[] = USB_INTERFACE_NAME " CDC2 data";
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static usb_cdc_serial_obj_t usb_cdc_console_obj = {
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.base.type = &usb_cdc_serial_type,
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.timeout = -1.0f,
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.write_timeout = -1.0f,
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.idx = 0,
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};
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static usb_cdc_serial_obj_t usb_cdc_data_obj = {
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.base.type = &usb_cdc_serial_type,
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.timeout = -1.0f,
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.write_timeout = -1.0f,
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.idx = 1,
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};
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static bool usb_cdc_console_is_enabled;
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static bool usb_cdc_data_is_enabled;
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void usb_cdc_set_defaults(void) {
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usb_cdc_console_is_enabled = CIRCUITPY_USB_CDC_CONSOLE_ENABLED_DEFAULT;
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usb_cdc_data_is_enabled = CIRCUITPY_USB_CDC_DATA_ENABLED_DEFAULT;
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}
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bool usb_cdc_console_enabled(void) {
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return usb_cdc_console_is_enabled;
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}
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bool usb_cdc_data_enabled(void) {
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return usb_cdc_data_is_enabled;
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}
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size_t usb_cdc_descriptor_length(void) {
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return sizeof(usb_cdc_descriptor_template);
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}
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size_t usb_cdc_add_descriptor(uint8_t *descriptor_buf, uint8_t *current_interface, uint8_t *current_endpoint, uint8_t *current_interface_string, bool console) {
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memcpy(descriptor_buf, usb_cdc_descriptor_template, sizeof(usb_cdc_descriptor_template));
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// Store comm interface number.
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descriptor_buf[CDC_FIRST_INTERFACE_INDEX] = *current_interface;
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descriptor_buf[CDC_COMM_INTERFACE_INDEX] = *current_interface;
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descriptor_buf[CDC_UNION_MASTER_INTERFACE_INDEX] = *current_interface;
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(*current_interface)++;
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// Now store data interface number.
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descriptor_buf[CDC_CALL_MANAGEMENT_DATA_INTERFACE_INDEX] = *current_interface;
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descriptor_buf[CDC_UNION_SLAVE_INTERFACE_INDEX] = *current_interface;
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descriptor_buf[CDC_DATA_INTERFACE_INDEX] = *current_interface;
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(*current_interface)++;
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descriptor_buf[CDC_CONTROL_IN_ENDPOINT_INDEX] = 0x80 | (
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console
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? (USB_CDC_EP_NUM_NOTIFICATION ? USB_CDC_EP_NUM_NOTIFICATION : *current_endpoint)
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: (USB_CDC2_EP_NUM_NOTIFICATION ? USB_CDC2_EP_NUM_NOTIFICATION : *current_endpoint));
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(*current_endpoint)++;
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descriptor_buf[CDC_DATA_OUT_ENDPOINT_INDEX] =
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console
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? (USB_CDC_EP_NUM_DATA_OUT ? USB_CDC_EP_NUM_DATA_OUT : *current_endpoint)
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: (USB_CDC2_EP_NUM_DATA_OUT ? USB_CDC2_EP_NUM_DATA_OUT : *current_endpoint);
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descriptor_buf[CDC_DATA_IN_ENDPOINT_INDEX] = 0x80 | (
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console
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? (USB_CDC_EP_NUM_DATA_IN ? USB_CDC_EP_NUM_DATA_IN : *current_endpoint)
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: (USB_CDC2_EP_NUM_DATA_IN ? USB_CDC2_EP_NUM_DATA_IN : *current_endpoint));
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(*current_endpoint)++;
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usb_add_interface_string(*current_interface_string,
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console ? console_cdc_comm_interface_name : data_cdc_comm_interface_name);
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descriptor_buf[CDC_COMM_INTERFACE_STRING_INDEX] = *current_interface_string;
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(*current_interface_string)++;
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usb_add_interface_string(*current_interface_string,
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console ? console_cdc_data_interface_name : data_cdc_data_interface_name);
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descriptor_buf[CDC_DATA_INTERFACE_STRING_INDEX] = *current_interface_string;
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(*current_interface_string)++;
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return sizeof(usb_cdc_descriptor_template);
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}
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bool common_hal_usb_cdc_disable(void) {
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return common_hal_usb_cdc_enable(false, false);
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}
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bool common_hal_usb_cdc_enable(bool console, bool data) {
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// We can't change the descriptors once we're connected.
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if (tud_connected()) {
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return false;
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}
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// Right now these objects contain no heap objects, but if that changes,
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// they will need to be protected against gc.
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usb_cdc_console_is_enabled = console;
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usb_cdc_set_console(console ? MP_OBJ_FROM_PTR(&usb_cdc_console_obj) : mp_const_none);
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usb_cdc_data_is_enabled = data;
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usb_cdc_set_data(data ? MP_OBJ_FROM_PTR(&usb_cdc_data_obj) : mp_const_none);
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return true;
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}
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