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Use literal ATA serial number for USB SN descriptor if the string is printable

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Change-Id: Ic2c853a0b124d7b590ea36229347c56f96a32f33
This commit is contained in:
Vencislav Atanasov 2024-06-23 07:12:47 +03:00
parent 9fda39d1ad
commit 9c458bbb0d
1 changed files with 34 additions and 8 deletions
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42
firmware/usbstack/usb_core.c
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@ -359,17 +359,43 @@ static void set_serial_descriptor(void)
{
short* p = &usb_string_iSerial.wString[1];
unsigned short* identify = ata_get_identify();
unsigned short x;
char sn[20];
char length = 20;
int i;
for(i = 10; i < 20; i++) {
x = identify[i];
*p++ = hex[(x >> 12) & 0xF];
*p++ = hex[(x >> 8) & 0xF];
*p++ = hex[(x >> 4) & 0xF];
*p++ = hex[(x >> 0) & 0xF];
for (i = 0; i < length / 2; i++) {
((unsigned short*)sn)[i] = htobe16(identify[i + 10]);
}
char is_printable = 1;
for (i = 0; i < length; i++) {
if (sn[i] < 32 || sn[i] > 126) {
is_printable = 0;
break;
}
}
if (is_printable) {
/* trim trailing spaces */
while (length > 0 && sn[length - 1] == ' ') {
length--;
}
for (i = 0; i < length; i++) {
*p++ = sn[i];
}
usb_string_iSerial.bLength = 2 + 2 * (1 + length);
}
else {
for (i = 0; i < length; i++) {
char x = sn[i];
*p++ = hex[(x >> 4) & 0xF];
*p++ = hex[x & 0xF];
}
usb_string_iSerial.bLength = 2 + 2 * (1 + length * 2);
}
usb_string_iSerial.bLength = 84;
}
#elif (CONFIG_STORAGE & STORAGE_RAMDISK)
/* This "serial number" isn't unique, but it should never actually