return;
eeprom = ftdi->eeprom;
+ memset(eeprom, 0, sizeof(struct ftdi_eeprom));
eeprom->vendor_id = 0x0403;
- eeprom->product_id = 0x6001;
-
- eeprom->self_powered = 1;
- eeprom->remote_wakeup = 1;
- eeprom->release = 0;
-
- eeprom->in_is_isochronous = 0;
- eeprom->out_is_isochronous = 0;
- eeprom->suspend_pull_downs = 0;
-
- eeprom->use_serial = 0;
- eeprom->change_usb_version = 0;
+ eeprom->use_serial = USE_SERIAL_NUM;
+ if((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM) ||
+ (ftdi->type == TYPE_R))
+ eeprom->product_id = 0x6001;
+ else
+ eeprom->product_id = 0x6010;
+ switch (ftdi->type)
+ {
+ case TYPE_2232C:
+ eeprom->release = 0x500;
+ break;
+ case TYPE_2232H:
+ eeprom->release = 0x200;
+ break;
+ default:
+ eeprom->release = 0;
+ }
eeprom->usb_version = 0x0200;
- eeprom->max_power = 0;
+ eeprom->max_power = 100;
eeprom->manufacturer = NULL;
eeprom->product = NULL;
eeprom->serial = NULL;
- for (i=0; i < 5; i++)
- {
- eeprom->cbus_function[i] = 0;
- }
- eeprom->high_current_a = 0;
- eeprom->invert = 0;
- eeprom->size = FTDI_MAX_EEPROM_SIZE;
+ if(ftdi->type == TYPE_R)
+ eeprom->size = 0x80;
+ else
+ eeprom->size = -1;
}
/**
\retval -3: Invalid cbus function setting
\retval -4: Chip doesn't support invert
\retval -5: Chip doesn't support high current drive
+ \retval -6: No connected EEPROM or EEPROM Type unknown
*/
int ftdi_eeprom_build(struct ftdi_context *ftdi, unsigned char *output)
{
eeprom= ftdi->eeprom;
+ if(eeprom->chip == -1)
+ ftdi_error_return(-5,"No connected EEPROM or EEPROM Type unknown");
+
if (eeprom->manufacturer != NULL)
manufacturer_size = strlen(eeprom->manufacturer);
if (eeprom->product != NULL)
if (eeprom->high_current_a) return -5;
}
- size_check = eeprom->size;
- size_check -= 28; // 28 are always in use (fixed)
+ size_check = 0x80;
+ switch(ftdi->type)
+ {
+ case TYPE_2232H:
+ case TYPE_4232H:
+ size_check -= 4;
+ case TYPE_R:
+ size_check -= 4;
+ case TYPE_2232C:
+ size_check -= 4;
+ case TYPE_AM:
+ case TYPE_BM:
+ size_check -= 0x14*2;
+ }
- // Top half of a 256byte eeprom is used just for strings and checksum
- // 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;
size_check -= manufacturer_size*2;
size_check -= product_size*2;
size_check -= serial_size*2;
+ /* Space for the string type and pointer bytes */
+ size_check -= -6;
+
// eeprom size exceeded?
if (size_check < 0)
return (-1);
if (ftdi == NULL)
ftdi_error_return(-1,"No context");
if (ftdi->eeprom == NULL)
- ftdi_error_return(-1,"No eeprom");
+ ftdi_error_return(-1,"No eeprom structure");
eeprom_size = ftdi->eeprom->size;
if(ftdi->type == TYPE_R)
eeprom->in_is_isochronous = buf[0x0A]&0x01;
eeprom->out_is_isochronous = buf[0x0A]&0x02;
eeprom->suspend_pull_downs = buf[0x0A]&0x04;
- eeprom->use_serial = buf[0x0A]&0x08;
+ eeprom->use_serial = buf[0x0A] & USE_SERIAL_NUM;
eeprom->change_usb_version = buf[0x0A]&0x10;
else if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM))
{
- eeprom->chip = buf[14];
+ eeprom->chip = -1;
}
else if(ftdi->type == TYPE_2232C)
{
- eeprom->chip = buf[14];
+ eeprom->chip = buf[0x14];
}
else if(ftdi->type == TYPE_R)
{
+ eeprom->chip = buf[0x16];
// Addr 0B: Invert data lines
// Works only on FT232R, not FT245R, but no way to distinguish
eeprom->invert = buf[0x0B];
}
else if ((ftdi->type == TYPE_2232H) ||(ftdi->type == TYPE_4232H))
{
+ eeprom->chip = buf[0x18];
eeprom->group0_drive = buf[0x0c] & DRIVE_16MA;
eeprom->group0_schmitt = buf[0x0c] & IS_SCHMITT;
eeprom->group0_slew = buf[0x0c] & SLOW_SLEW;
if(eeprom->self_powered)
fprintf(stdout, "Self-Powered%s", (eeprom->remote_wakeup)?", USB Remote Wake Up\n":"\n");
else
- fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power*2,
+ fprintf(stdout, "Bus Powered: %3d mA%s", eeprom->max_power * 2,
(eeprom->remote_wakeup)?" USB Remote Wake Up\n":"\n");
if(eeprom->manufacturer)
fprintf(stdout, "Manufacturer: %s\n",eeprom->manufacturer);
if(eeprom->serial)
fprintf(stdout, "Serial: %s\n",eeprom->serial);
fprintf(stdout, "Checksum : %04x\n", checksum);
+ if (ftdi->type == TYPE_R)
+ fprintf(stdout, "Internal EEPROM\n");
+ else if (eeprom->chip >= 0x46)
+ fprintf(stdout, "Attached EEPROM: 93x%02x\n", eeprom->chip);
if(eeprom->suspend_dbus7)
fprintf(stdout, "Suspend on DBUS7\n");
if(eeprom->suspend_pull_downs)
channel_mode[eeprom->channel_a_type],
(eeprom->channel_a_driver)?" VCP":"",
(eeprom->high_current_a)?" High Currenr IO":"");
- if (ftdi->type == TYPE_2232C)
+ if (ftdi->type >= TYPE_2232C)
fprintf(stdout,"Channel B has Mode %s%s%s\n",
channel_mode[eeprom->channel_b_type],
(eeprom->channel_b_driver)?" VCP":"",
\retval 0: all fine
\retval -1: erase failed
\retval -2: USB device unavailable
+ \retval -3: Writing magic failed
+ \retval -4: Read EEPROM failed
+ \retval -5: Unexpected EEPROM value
*/
+#define MAGIC 0x55aa
int ftdi_erase_eeprom(struct ftdi_context *ftdi)
{
+ unsigned short eeprom_value;
if (ftdi == NULL || ftdi->usb_dev == NULL)
ftdi_error_return(-2, "USB device unavailable");
- if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST, 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
+ if(ftdi->type == TYPE_R)
+ {
+ ftdi->eeprom->chip = 0;
+ return 0;
+ }
+
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
+ 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "unable to erase eeprom");
+
+ /* detect chip type by writing 0x55AA as magic at word position 0xc0
+ Chip is 93x46 if magic is read at word position 0x00, as wraparound happens around 0x40
+ Chip is 93x56 if magic is read at word position 0x40, as wraparound happens around 0x80
+ Chip is 93x66 if magic is only read at word position 0xc0*/
+ if( ftdi_write_eeprom_location(ftdi, 0xc0, MAGIC))
+ ftdi_error_return(-3, "Writing magic failed");
+ if (ftdi_read_eeprom_location( ftdi, 0x00, &eeprom_value))
+ ftdi_error_return(-4, "Reading failed failed");
+ if(eeprom_value == MAGIC)
+ {
+ ftdi->eeprom->chip = 0x46;
+ }
+ else
+ {
+ if (ftdi_read_eeprom_location( ftdi, 0x40, &eeprom_value))
+ ftdi_error_return(-4, "Reading failed failed");
+ if(eeprom_value == MAGIC)
+ ftdi->eeprom->chip = 0x56;
+ else
+ {
+ if (ftdi_read_eeprom_location( ftdi, 0xc0, &eeprom_value))
+ ftdi_error_return(-4, "Reading failed failed");
+ if(eeprom_value == MAGIC)
+ ftdi->eeprom->chip = 0x66;
+ else
+ {
+ ftdi->eeprom->chip = -1;
+ }
+ }
+ }
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST,
+ 0, 0, NULL, 0, ftdi->usb_write_timeout) < 0)
+ ftdi_error_return(-1, "unable to erase eeprom");
return 0;
}
git://developer.intra2net.com / libftdi / blobdiff