*/
void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom)
{
+ int i;
+
if (eeprom == NULL)
return;
eeprom->self_powered = 1;
eeprom->remote_wakeup = 1;
- eeprom->BM_type_chip = 1;
+ eeprom->chip_type = TYPE_BM;
eeprom->in_is_isochronous = 0;
eeprom->out_is_isochronous = 0;
eeprom->manufacturer = NULL;
eeprom->product = NULL;
eeprom->serial = NULL;
+ for (i=0; i < 5; i++)
+ {
+ eeprom->cbus_function[i] = 0;
+ }
+ eeprom->high_current = 0;
+ eeprom->invert = 0;
eeprom->size = FTDI_DEFAULT_EEPROM_SIZE;
}
Build binary output from ftdi_eeprom structure.
Output is suitable for ftdi_write_eeprom().
+ \note This function doesn't handle FT2232x devices. Only FT232x.
\param eeprom Pointer to ftdi_eeprom
\param output Buffer of 128 bytes to store eeprom image to
- \retval >0: used eeprom size
+ \retval >0: free eeprom size
\retval -1: eeprom size (128 bytes) exceeded by custom strings
\retval -2: Invalid eeprom pointer
+ \retval -3: Invalid cbus function setting
+ \retval -4: Chip doesn't support invert
+ \retval -5: Chip doesn't support high current drive
*/
int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output)
{
unsigned short checksum, value;
unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
int size_check;
+ const int cbus_max[5] = {13, 13, 13, 13, 9};
if (eeprom == NULL)
return -2;
if (eeprom->serial != NULL)
serial_size = strlen(eeprom->serial);
+ // highest allowed cbus value
+ for (i = 0; i < 5; i++)
+ {
+ if ((eeprom->cbus_function[i] > cbus_max[i]) ||
+ (eeprom->cbus_function[i] && eeprom->chip_type != TYPE_R)) return -3;
+ }
+ if (eeprom->chip_type != TYPE_R)
+ {
+ if (eeprom->invert) return -4;
+ if (eeprom->high_current) return -5;
+ }
+
size_check = eeprom->size;
size_check -= 28; // 28 are always in use (fixed)
// it seems that the FTDI chip will not read these strings from the lower half
// Each string starts with two bytes; offset and type (0x03 for string)
// the checksum needs two bytes, so without the string data that 8 bytes from the top half
- if (eeprom->size>=256)size_check = 120;
+ if (eeprom->size>=256) size_check = 120;
size_check -= manufacturer_size*2;
size_check -= product_size*2;
size_check -= serial_size*2;
// empty eeprom
memset (output, 0, eeprom->size);
- // Addr 00: Stay 00 00
+ // Addr 00: High current IO
+ output[0x00] = eeprom->high_current ? HIGH_CURRENT_DRIVE : 0;
+ // Addr 01: IN endpoint size (for R type devices, different for FT2232)
+ if (eeprom->chip_type == TYPE_R) {
+ output[0x01] = 0x40;
+ }
// Addr 02: Vendor ID
output[0x02] = eeprom->vendor_id;
output[0x03] = eeprom->vendor_id >> 8;
// Addr 06: Device release number (0400h for BM features)
output[0x06] = 0x00;
-
- if (eeprom->BM_type_chip == 1)
- output[0x07] = 0x04;
- else
- output[0x07] = 0x02;
+ switch (eeprom->chip_type) {
+ case TYPE_AM:
+ output[0x07] = 0x02;
+ break;
+ case TYPE_BM:
+ output[0x07] = 0x04;
+ break;
+ case TYPE_2232C:
+ output[0x07] = 0x05;
+ break;
+ case TYPE_R:
+ output[0x07] = 0x06;
+ break;
+ default:
+ output[0x07] = 0x00;
+ }
// Addr 08: Config descriptor
// Bit 7: always 1
j = j | 16;
output[0x0A] = j;
- // Addr 0B: reserved
- output[0x0B] = 0x00;
+ // Addr 0B: Invert data lines
+ output[0x0B] = eeprom->invert & 0xff;
// Addr 0C: USB version low byte when 0x0A bit 4 is set
// Addr 0D: USB version high byte when 0x0A bit 4 is set
// Addr 13: Length of serial string
output[0x13] = serial_size*2 + 2;
+ // Addr 14: CBUS function: CBUS0, CBUS1
+ // Addr 15: CBUS function: CBUS2, CBUS3
+ // Addr 16: CBUS function: CBUS5
+ output[0x14] = eeprom->cbus_function[0] | (eeprom->cbus_function[1] << 4);
+ output[0x15] = eeprom->cbus_function[2] | (eeprom->cbus_function[3] << 4);
+ output[0x16] = eeprom->cbus_function[4];
+ // Addr 17: Unknown
+
// Dynamic content
- i=0x14;
- if (eeprom->size>=256) i = 0x80;
+ // In images produced by FTDI's FT_Prog for FT232R strings start at 0x18
+ // Space till 0x18 should be considered as reserved.
+ if (eeprom->chip_type >= TYPE_R) {
+ i = 0x18;
+ } else {
+ i = 0x14;
+ }
+ if (eeprom->size >= 256) i = 0x80;
// Output manufacturer
// empty eeprom struct
memset(eeprom, 0, sizeof(struct ftdi_eeprom));
- // Addr 00: Stay 00 00
+ // Addr 00: High current IO
+ eeprom->high_current = (buf[0x02] & HIGH_CURRENT_DRIVE);
// Addr 02: Vendor ID
eeprom->vendor_id = buf[0x02] + (buf[0x03] << 8);
value = buf[0x06] + (buf[0x07]<<8);
switch (value)
{
+ case 0x0600:
+ eeprom->chip_type = TYPE_R;
+ break;
case 0x0400:
- eeprom->BM_type_chip = 1;
+ eeprom->chip_type = TYPE_BM;
break;
case 0x0200:
- eeprom->BM_type_chip = 0;
+ eeprom->chip_type = TYPE_AM;
break;
default: // Unknown device
- eeprom->BM_type_chip = 0;
+ eeprom->chip_type = 0;
break;
}
if (j&0x08) eeprom->use_serial = 1;
if (j&0x10) eeprom->change_usb_version = 1;
- // Addr 0B: reserved
+ // Addr 0B: Invert data lines
+ eeprom->invert = buf[0x0B];
// Addr 0C: USB version low byte when 0x0A bit 4 is set
// Addr 0D: USB version high byte when 0x0A bit 4 is set
if (serial_size > 0) eeprom->serial = malloc(serial_size);
else eeprom->serial = NULL;
+ // Addr 14: CBUS function: CBUS0, CBUS1
+ // Addr 15: CBUS function: CBUS2, CBUS3
+ // Addr 16: CBUS function: CBUS5
+ if (eeprom->chip_type == TYPE_R) {
+ eeprom->cbus_function[0] = buf[0x14] & 0x0f;
+ eeprom->cbus_function[1] = (buf[0x14] >> 4) & 0x0f;
+ eeprom->cbus_function[2] = buf[0x15] & 0x0f;
+ eeprom->cbus_function[3] = (buf[0x15] >> 4) & 0x0f;
+ eeprom->cbus_function[4] = buf[0x16] & 0x0f;
+ } else {
+ for (j=0; j<5; j++) eeprom->cbus_function[j] = 0;
+ }
+
// Decode manufacturer
i = buf[0x0E] & 0x7f; // offset
for (j=0;j<manufacturer_size-1;j++)
git://developer.intra2net.com / libftdi / blobdiff