347 lines
13 KiB
C
347 lines
13 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2018 hathach for Adafruit Industries
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "lib/tinyusb/src/tusb.h"
|
|
|
|
#include "py/objstr.h"
|
|
#include "py/runtime.h"
|
|
#include "supervisor/memory.h"
|
|
#include "supervisor/shared/safe_mode.h"
|
|
#include "supervisor/usb.h"
|
|
|
|
#if CIRCUITPY_USB_CDC
|
|
#include "shared-bindings/usb_cdc/__init__.h"
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_HID
|
|
#include "shared-bindings/usb_hid/__init__.h"
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_MIDI
|
|
#include "shared-bindings/usb_midi/__init__.h"
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_MSC && CIRCUITPY_STORAGE
|
|
#include "shared-bindings/storage/__init__.h"
|
|
#endif
|
|
|
|
#include "shared-bindings/microcontroller/Processor.h"
|
|
|
|
|
|
// Table for collecting interface strings (interface names) as descriptor is built.
|
|
// We reuse the same table after collection, replacing the char string pointers with le16 string pointers.
|
|
#define MAX_INTERFACE_STRINGS 16
|
|
// slot 0 is always the Language ID
|
|
typedef union {
|
|
const char *char_str;
|
|
const uint16_t *descriptor;
|
|
} interface_string_t;
|
|
static interface_string_t collected_interface_strings[MAX_INTERFACE_STRINGS];
|
|
|
|
static size_t collected_interface_strings_length;
|
|
static uint8_t current_interface_string;
|
|
|
|
static supervisor_allocation *device_descriptor_allocation;
|
|
static supervisor_allocation *configuration_descriptor_allocation;
|
|
static supervisor_allocation *string_descriptors_allocation;
|
|
|
|
static const char manufacturer_name[] = USB_MANUFACTURER;
|
|
static const char product_name[] = USB_PRODUCT;
|
|
|
|
// Serial number string is UID length * 2 (2 nibbles per byte) + 1 byte for null termination.
|
|
static char serial_number_hex_string[COMMON_HAL_MCU_PROCESSOR_UID_LENGTH * 2 + 1];
|
|
|
|
|
|
static const uint8_t device_descriptor_template[] = {
|
|
0x12, // 0 bLength
|
|
0x01, // 1 bDescriptorType (Device)
|
|
0x00, 0x02, // 2,3 bcdUSB 2.00
|
|
0x00, // 4 bDeviceClass (Use class information in the Interface Descriptors)
|
|
0x00, // 5 bDeviceSubClass
|
|
0x00, // 6 bDeviceProtocol
|
|
0x40, // 7 bMaxPacketSize0 64
|
|
0xFF, 0xFF, // 8,9 idVendor [SET AT RUNTIME: lo,hi]
|
|
#define DEVICE_VID_LO_INDEX (8)
|
|
#define DEVICE_VID_HI_INDEX (9)
|
|
0xFF, 0xFF, // 10,11 idProduct [SET AT RUNTIME: lo,hi]
|
|
#define DEVICE_PID_LO_INDEX (10)
|
|
#define DEVICE_PID_HI_INDEX (11)
|
|
0x00, 0x01, // 12,13 bcdDevice 2.00
|
|
0xFF, // 14 iManufacturer (String Index) [SET AT RUNTIME]
|
|
#define DEVICE_MANUFACTURER_STRING_INDEX (14)
|
|
0xFF, // 15 iProduct (String Index) [SET AT RUNTIME]
|
|
#define DEVICE_PRODUCT_STRING_INDEX (15)
|
|
0xFF, // 16 iSerialNumber (String Index) [SET AT RUNTIME]
|
|
#define DEVICE_SERIAL_NUMBER_STRING_INDEX (16)
|
|
0x01, // 17 bNumConfigurations 1
|
|
};
|
|
|
|
static const uint8_t configuration_descriptor_template[] = {
|
|
0x09, // 0 bLength
|
|
0x02, // 1 bDescriptorType (Configuration)
|
|
0xFF, 0xFF, // 2,3 wTotalLength [SET AT RUNTIME: lo, hi]
|
|
#define CONFIG_TOTAL_LENGTH_LO_INDEX (2)
|
|
#define CONFIG_TOTAL_LENGTH_HI_INDEX (3)
|
|
0xFF, // 4 bNumInterfaces [SET AT RUNTIME]
|
|
#define CONFIG_NUM_INTERFACES_INDEX (4)
|
|
0x01, // 5 bConfigurationValue
|
|
0x00, // 6 iConfiguration (String Index)
|
|
0x80, // 7 bmAttributes
|
|
0x32, // 8 bMaxPower 100mA
|
|
};
|
|
|
|
static void usb_build_device_descriptor(uint16_t vid, uint16_t pid) {
|
|
device_descriptor_allocation =
|
|
allocate_memory(align32_size(sizeof(device_descriptor_template)),
|
|
/*high_address*/ false, /*movable*/ false);
|
|
uint8_t *device_descriptor = (uint8_t *)device_descriptor_allocation->ptr;
|
|
memcpy(device_descriptor, device_descriptor_template, sizeof(device_descriptor_template));
|
|
|
|
device_descriptor[DEVICE_VID_LO_INDEX] = vid & 0xFF;
|
|
device_descriptor[DEVICE_VID_HI_INDEX] = vid >> 8;
|
|
device_descriptor[DEVICE_PID_LO_INDEX] = pid & 0xFF;
|
|
device_descriptor[DEVICE_PID_HI_INDEX] = pid >> 8;
|
|
|
|
usb_add_interface_string(current_interface_string, manufacturer_name);
|
|
device_descriptor[DEVICE_MANUFACTURER_STRING_INDEX] = current_interface_string;
|
|
current_interface_string++;
|
|
|
|
usb_add_interface_string(current_interface_string, product_name);
|
|
device_descriptor[DEVICE_PRODUCT_STRING_INDEX] = current_interface_string;
|
|
current_interface_string++;
|
|
|
|
usb_add_interface_string(current_interface_string, serial_number_hex_string);
|
|
device_descriptor[DEVICE_SERIAL_NUMBER_STRING_INDEX] = current_interface_string;
|
|
current_interface_string++;
|
|
}
|
|
|
|
static void usb_build_configuration_descriptor(void) {
|
|
size_t total_descriptor_length = sizeof(configuration_descriptor_template);
|
|
|
|
// CDC should be first, for compatibility with Adafruit Windows 7 drivers.
|
|
// In the past, the order has been CDC, MSC, MIDI, HID, so preserve that order.
|
|
#if CIRCUITPY_USB_CDC
|
|
if (usb_cdc_console_enabled()) {
|
|
total_descriptor_length += usb_cdc_descriptor_length();
|
|
}
|
|
if (usb_cdc_data_enabled()) {
|
|
total_descriptor_length += usb_cdc_descriptor_length();
|
|
}
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_MSC
|
|
if (storage_usb_enabled()) {
|
|
total_descriptor_length += storage_usb_descriptor_length();
|
|
}
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_HID
|
|
if (usb_hid_enabled()) {
|
|
total_descriptor_length += usb_hid_descriptor_length();
|
|
}
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_MIDI
|
|
if (usb_midi_enabled()) {
|
|
total_descriptor_length += usb_midi_descriptor_length();
|
|
}
|
|
#endif
|
|
|
|
// Now we now how big the configuration descriptor will be, so we can allocate space for it.
|
|
configuration_descriptor_allocation =
|
|
allocate_memory(align32_size(total_descriptor_length),
|
|
/*high_address*/ false, /*movable*/ false);
|
|
uint8_t *configuration_descriptor = (uint8_t *)configuration_descriptor_allocation->ptr;
|
|
|
|
// Copy the template, which is the first part of the descriptor, and fix up its length.
|
|
|
|
memcpy(configuration_descriptor, configuration_descriptor_template, sizeof(configuration_descriptor_template));
|
|
|
|
configuration_descriptor[CONFIG_TOTAL_LENGTH_LO_INDEX] = total_descriptor_length & 0xFF;
|
|
configuration_descriptor[CONFIG_TOTAL_LENGTH_HI_INDEX] = (total_descriptor_length >> 8) & 0xFF;
|
|
|
|
// Number interfaces and endpoints.
|
|
// Endpoint 0 is already used for USB control,
|
|
// so start with 1 for the current endpoint and for the number of in and out endpoints
|
|
// already in use.
|
|
|
|
descriptor_counts_t descriptor_counts = {
|
|
.current_interface = 0,
|
|
.current_endpoint = 1,
|
|
.num_in_endpoints = 1,
|
|
.num_out_endpoints = 1,
|
|
};
|
|
|
|
uint8_t *descriptor_buf_remaining = configuration_descriptor + sizeof(configuration_descriptor_template);
|
|
|
|
#if CIRCUITPY_USB_CDC
|
|
if (usb_cdc_console_enabled()) {
|
|
// Concatenate and fix up the CDC REPL descriptor.
|
|
descriptor_buf_remaining += usb_cdc_add_descriptor(
|
|
descriptor_buf_remaining, &descriptor_counts, ¤t_interface_string, true /*console*/);
|
|
|
|
}
|
|
if (usb_cdc_data_enabled()) {
|
|
// Concatenate and fix up the CDC data descriptor.
|
|
descriptor_buf_remaining += usb_cdc_add_descriptor(
|
|
descriptor_buf_remaining, &descriptor_counts, ¤t_interface_string, false /*console*/);
|
|
}
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_MSC
|
|
if (storage_usb_enabled()) {
|
|
// Concatenate and fix up the MSC descriptor.
|
|
descriptor_buf_remaining += storage_usb_add_descriptor(
|
|
descriptor_buf_remaining, &descriptor_counts, ¤t_interface_string);
|
|
}
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_HID
|
|
if (usb_hid_enabled()) {
|
|
descriptor_buf_remaining += usb_hid_add_descriptor(
|
|
descriptor_buf_remaining, &descriptor_counts, ¤t_interface_string,
|
|
usb_hid_report_descriptor_length(), usb_hid_boot_device());
|
|
}
|
|
#endif
|
|
|
|
#if CIRCUITPY_USB_MIDI
|
|
if (usb_midi_enabled()) {
|
|
// Concatenate and fix up the MIDI descriptor.
|
|
descriptor_buf_remaining += usb_midi_add_descriptor(
|
|
descriptor_buf_remaining, &descriptor_counts, ¤t_interface_string);
|
|
}
|
|
#endif
|
|
|
|
// Now we know how many interfaces have been used.
|
|
configuration_descriptor[CONFIG_NUM_INTERFACES_INDEX] = descriptor_counts.current_interface;
|
|
|
|
// Did we run out of endpoints?
|
|
if (descriptor_counts.current_endpoint > USB_NUM_ENDPOINT_PAIRS ||
|
|
descriptor_counts.num_in_endpoints > USB_NUM_IN_ENDPOINTS ||
|
|
descriptor_counts.num_out_endpoints > USB_NUM_OUT_ENDPOINTS) {
|
|
reset_into_safe_mode(USB_TOO_MANY_ENDPOINTS);
|
|
}
|
|
}
|
|
|
|
// str must not be on the heap.
|
|
void usb_add_interface_string(uint8_t interface_string_index, const char str[]) {
|
|
if (interface_string_index > MAX_INTERFACE_STRINGS) {
|
|
reset_into_safe_mode(USB_TOO_MANY_INTERFACE_NAMES);
|
|
}
|
|
|
|
collected_interface_strings[interface_string_index].char_str = str;
|
|
collected_interface_strings_length += strlen(str);
|
|
}
|
|
|
|
static const uint16_t language_id[] = {
|
|
0x0304,
|
|
0x0409,
|
|
};
|
|
|
|
static void usb_build_interface_string_table(void) {
|
|
// Allocate space for the le16 String descriptors.
|
|
// Space needed is 2 bytes for String Descriptor header, then 2 bytes for each character
|
|
string_descriptors_allocation =
|
|
allocate_memory(align32_size(current_interface_string * 2 + collected_interface_strings_length * 2),
|
|
/*high_address*/ false, /*movable*/ false);
|
|
uint16_t *string_descriptors = (uint16_t *)string_descriptors_allocation->ptr;
|
|
|
|
|
|
uint16_t *string_descriptor = string_descriptors;
|
|
|
|
// Language ID is always the 0th string descriptor.
|
|
collected_interface_strings[0].descriptor = language_id;
|
|
|
|
// Build the le16 versions of all the descriptor strings.
|
|
// Start at 1 to skip the Language ID.
|
|
for (uint8_t string_index = 1; string_index < current_interface_string; string_index++) {
|
|
const char *str = collected_interface_strings[string_index].char_str;
|
|
const size_t str_len = strlen(str);
|
|
// 1 word for descriptor type and length, 1 word for each character.
|
|
const uint8_t descriptor_size_words = 1 + str_len;
|
|
const uint8_t descriptor_size_bytes = descriptor_size_words * 2;
|
|
string_descriptor[0] = 0x0300 | descriptor_size_bytes;
|
|
|
|
// Convert to le16.
|
|
for (size_t i = 0; i < str_len; i++) {
|
|
string_descriptor[i + 1] = str[i];
|
|
}
|
|
|
|
// Save ptr to string descriptor with le16 str.
|
|
collected_interface_strings[string_index].descriptor = string_descriptor;
|
|
|
|
// Move to next descriptor slot.
|
|
string_descriptor += descriptor_size_words;
|
|
}
|
|
}
|
|
|
|
// After boot.py runs, the USB devices to be used have been chosen, and the descriptors can be set up.
|
|
// This is called after the VM is finished, because it uses storage_allocations.
|
|
void usb_build_descriptors(void) {
|
|
uint8_t raw_id[COMMON_HAL_MCU_PROCESSOR_UID_LENGTH];
|
|
common_hal_mcu_processor_get_uid(raw_id);
|
|
|
|
for (int i = 0; i < COMMON_HAL_MCU_PROCESSOR_UID_LENGTH; i++) {
|
|
for (int j = 0; j < 2; j++) {
|
|
uint8_t nibble = (raw_id[i] >> (j * 4)) & 0xf;
|
|
serial_number_hex_string[i * 2 + (1 - j)] = nibble_to_hex_upper[nibble];
|
|
}
|
|
}
|
|
|
|
// Null-terminate the string.
|
|
serial_number_hex_string[sizeof(serial_number_hex_string) - 1] = '\0';
|
|
|
|
current_interface_string = 1;
|
|
collected_interface_strings_length = 0;
|
|
|
|
usb_build_device_descriptor(USB_VID, USB_PID);
|
|
usb_build_configuration_descriptor();
|
|
usb_build_interface_string_table();
|
|
}
|
|
|
|
// Invoked when GET DEVICE DESCRIPTOR is received.
|
|
// Application return pointer to descriptor
|
|
uint8_t const *tud_descriptor_device_cb(void) {
|
|
return (uint8_t *)device_descriptor_allocation->ptr;
|
|
}
|
|
|
|
// Invoked when GET CONFIGURATION DESCRIPTOR is received.
|
|
// Application return pointer to descriptor
|
|
// Descriptor contents must exist long enough for transfer to complete
|
|
uint8_t const *tud_descriptor_configuration_cb(uint8_t index) {
|
|
(void)index; // for multiple configurations
|
|
return (uint8_t *)configuration_descriptor_allocation->ptr;
|
|
}
|
|
|
|
// Invoked when GET STRING DESCRIPTOR request is received.
|
|
// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
|
|
uint16_t const *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
|
|
if (index > MAX_INTERFACE_STRINGS) {
|
|
return NULL;
|
|
}
|
|
return collected_interface_strings[index].descriptor;
|
|
}
|