7d36a7a868
Causes slow enumeration and raw HID command interface. Signed-off-by: Daniel Schaefer <dhs@frame.work>
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
// Copyright 2022 Framework Computer
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "quantum.h"
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#include "dyn_serial.h"
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#include "usb_descriptor.h"
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#include "usb_descriptor_common.h"
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// Prefix string literal with L for descriptors
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#ifdef SERIAL_NUMBER
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USB_Descriptor_String_t PROGMEM SerialNumberString = {
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.Header = {
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.Size = sizeof(FALLBACK_SERIAL_NUMBER),
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.Type = DTYPE_String
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},
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.UnicodeString = FALLBACK_SERIAL_NUMBER
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};
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char ascii_serialnum[SERIALNUM_LEN+1];
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void *dyn_serial_number_string(void) {
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// TODO: Fix this
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// Need to remove the logic here because it overlaps with VIA settings
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return &SerialNumberString;
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// Exit early, if it was previously read and converted
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if (ascii_serialnum[0] != '\0' || ascii_serialnum[0] == 0xFF) {
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return &SerialNumberString;
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}
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// Read ASCII serial number from memory-mapped flash
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char *serialnum_ptr = (char*) (FLASH_OFFSET + LAST_4K_BLOCK);
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memcpy(ascii_serialnum, serialnum_ptr, SERIALNUM_LEN);
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// Just keep fallback serialnumber if the flash is erased
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if (ascii_serialnum[0] == 0xFF) {
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return &SerialNumberString;
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}
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// Convert to UCS-2, which is equivalent to UTF-16, if the input is ASCII
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for (int i = 0; i < SERIALNUM_LEN; i++) {
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if (ascii_serialnum[i] > 128) {
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dprintf("Serial number character %d is not valid ASCII.", ascii_serialnum[i]);
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SerialNumberString.Header.Size = i * 2;
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break;
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}
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SerialNumberString.UnicodeString[i] = ascii_serialnum[i];
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}
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return &SerialNumberString;
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}
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uint16_t dyn_serial_number_string_len(void) {
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return pgm_read_byte(&SerialNumberString.Header.Size);
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}
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#endif
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