return code; \
} while(0);
+/**
+ Internal function to close usb device pointer.
+ Sets ftdi->usb_dev to NULL.
+ \internal
+
+ \param ftdi pointer to ftdi_context
+
+ \retval zero if all is fine, otherwise error code from usb_close()
+*/
+static int ftdi_usb_close_internal (struct ftdi_context *ftdi)
+{
+ int ret = 0;
+
+ if (ftdi->usb_dev)
+ {
+ ret = usb_close (ftdi->usb_dev);
+ ftdi->usb_dev = NULL;
+ }
+
+ return ret;
+}
/**
Initializes a ftdi_context.
ftdi->readbuffer_offset = 0;
ftdi->readbuffer_remaining = 0;
ftdi->writebuffer_chunksize = 4096;
+ ftdi->max_packet_size = 0;
ftdi->interface = 0;
ftdi->index = 0;
\return a pointer to a new ftdi_context, or NULL on failure
*/
-struct ftdi_context *ftdi_new()
+struct ftdi_context *ftdi_new(void)
{
struct ftdi_context * ftdi = (struct ftdi_context *)malloc(sizeof(struct ftdi_context));
Open selected channels on a chip, otherwise use first channel.
\param ftdi pointer to ftdi_context
- \param interface Interface to use for FT2232C chips.
+ \param interface Interface to use for FT2232C/2232H/4232H chips.
\retval 0: all fine
\retval -1: unknown interface
ftdi->in_ep = 0x04;
ftdi->out_ep = 0x83;
break;
+ case INTERFACE_C:
+ ftdi->interface = 2;
+ ftdi->index = INTERFACE_C;
+ ftdi->in_ep = 0x06;
+ ftdi->out_ep = 0x85;
+ break;
+ case INTERFACE_D:
+ ftdi->interface = 3;
+ ftdi->index = INTERFACE_D;
+ ftdi->in_ep = 0x08;
+ ftdi->out_ep = 0x87;
+ break;
default:
ftdi_error_return(-1, "Unknown interface");
}
*/
void ftdi_deinit(struct ftdi_context *ftdi)
{
+ ftdi_usb_close_internal (ftdi);
+
if (ftdi->async_usb_buffer != NULL)
{
free(ftdi->async_usb_buffer);
{
if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iManufacturer, manufacturer, mnf_len) <= 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
ftdi_error_return(-7, usb_strerror());
}
}
{
if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, description, desc_len) <= 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
ftdi_error_return(-8, usb_strerror());
}
}
{
if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, serial, serial_len) <= 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
ftdi_error_return(-9, usb_strerror());
}
}
- if (usb_close (ftdi->usb_dev) != 0)
+ if (ftdi_usb_close_internal (ftdi) != 0)
ftdi_error_return(-10, usb_strerror());
return 0;
}
/**
+ * Internal function to determine the maximum packet size.
+ * \param ftdi pointer to ftdi_context
+ * \param dev libusb usb_dev to use
+ * \retval Maximum packet size for this device
+ */
+static unsigned int _ftdi_determine_max_packet_size(struct ftdi_context *ftdi, struct usb_device *dev)
+{
+ unsigned int packet_size;
+
+ // Determine maximum packet size. Init with default value.
+ // New hi-speed devices from FTDI use a packet size of 512 bytes
+ // but could be connected to a normal speed USB hub -> 64 bytes packet size.
+ if (ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H)
+ packet_size = 512;
+ else
+ packet_size = 64;
+
+ if (dev->descriptor.bNumConfigurations > 0 && dev->config)
+ {
+ struct usb_config_descriptor config = dev->config[0];
+
+ if (ftdi->interface < config.bNumInterfaces)
+ {
+ struct usb_interface interface = config.interface[ftdi->interface];
+ if (interface.num_altsetting > 0)
+ {
+ struct usb_interface_descriptor descriptor = interface.altsetting[0];
+ if (descriptor.bNumEndpoints > 0)
+ {
+ packet_size = descriptor.endpoint[0].wMaxPacketSize;
+ }
+ }
+ }
+ }
+
+ return packet_size;
+}
+
+/**
Opens a ftdi device given by a usb_device.
\param ftdi pointer to ftdi_context
int ftdi_usb_open_dev(struct ftdi_context *ftdi, struct usb_device *dev)
{
int detach_errno = 0;
+ int config_val = 1;
if (!(ftdi->usb_dev = usb_open(dev)))
ftdi_error_return(-4, "usb_open() failed");
detach_errno = errno;
#endif
+#ifdef __WIN32__
// set configuration (needed especially for windows)
// tolerate EBUSY: one device with one configuration, but two interfaces
// and libftdi sessions to both interfaces (e.g. FT2232)
- if (dev->descriptor.bNumConfigurations > 0 &&
- usb_set_configuration(ftdi->usb_dev, dev->config[0].bConfigurationValue) &&
- errno != EBUSY)
+
+ if (dev->descriptor.bNumConfigurations > 0)
{
- usb_close (ftdi->usb_dev);
- if (detach_errno == EPERM)
- {
- ftdi_error_return(-8, "inappropriate permissions on device!");
- }
- else
+ // libusb-win32 on Windows 64 can return a null pointer for a valid device
+ if (dev->config)
+ config_val = dev->config[0].bConfigurationValue;
+
+ if (usb_set_configuration(ftdi->usb_dev, config_val) &&
+ errno != EBUSY)
{
- ftdi_error_return(-3, "unable to set usb configuration. Make sure ftdi_sio is unloaded!");
+ ftdi_usb_close_internal (ftdi);
+ if (detach_errno == EPERM)
+ {
+ ftdi_error_return(-8, "inappropriate permissions on device!");
+ }
+ else
+ {
+ ftdi_error_return(-3, "unable to set usb configuration. Make sure ftdi_sio is unloaded!");
+ }
}
}
+#endif
if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
if (detach_errno == EPERM)
{
ftdi_error_return(-8, "inappropriate permissions on device!");
if (ftdi_usb_reset (ftdi) != 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
ftdi_error_return(-6, "ftdi_usb_reset failed");
}
- if (ftdi_set_baudrate (ftdi, 9600) != 0)
- {
- usb_close (ftdi->usb_dev);
- ftdi_error_return(-7, "set baudrate failed");
- }
-
// Try to guess chip type
// Bug in the BM type chips: bcdDevice is 0x200 for serial == 0
if (dev->descriptor.bcdDevice == 0x400 || (dev->descriptor.bcdDevice == 0x200
else if (dev->descriptor.bcdDevice == 0x200)
ftdi->type = TYPE_AM;
else if (dev->descriptor.bcdDevice == 0x500)
- {
ftdi->type = TYPE_2232C;
- if (!ftdi->index)
- ftdi->index = INTERFACE_A;
- }
else if (dev->descriptor.bcdDevice == 0x600)
ftdi->type = TYPE_R;
+ else if (dev->descriptor.bcdDevice == 0x700)
+ ftdi->type = TYPE_2232H;
+ else if (dev->descriptor.bcdDevice == 0x800)
+ ftdi->type = TYPE_4232H;
+
+ // Set default interface on dual/quad type chips
+ switch(ftdi->type)
+ {
+ case TYPE_2232C:
+ case TYPE_2232H:
+ case TYPE_4232H:
+ if (!ftdi->index)
+ ftdi->index = INTERFACE_A;
+ break;
+ default:
+ break;
+ }
+
+ // Determine maximum packet size
+ ftdi->max_packet_size = _ftdi_determine_max_packet_size(ftdi, dev);
+
+ if (ftdi_set_baudrate (ftdi, 9600) != 0)
+ {
+ ftdi_usb_close_internal (ftdi);
+ ftdi_error_return(-7, "set baudrate failed");
+ }
ftdi_error_return(0, "all fine");
}
{
if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, string, sizeof(string)) <= 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
ftdi_error_return(-8, "unable to fetch product description");
}
if (strncmp(string, description, sizeof(string)) != 0)
{
- if (usb_close (ftdi->usb_dev) != 0)
+ if (ftdi_usb_close_internal (ftdi) != 0)
ftdi_error_return(-10, "unable to close device");
continue;
}
{
if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, string, sizeof(string)) <= 0)
{
- usb_close (ftdi->usb_dev);
+ ftdi_usb_close_internal (ftdi);
ftdi_error_return(-9, "unable to fetch serial number");
}
if (strncmp(string, serial, sizeof(string)) != 0)
{
- if (usb_close (ftdi->usb_dev) != 0)
+ if (ftdi_usb_close_internal (ftdi) != 0)
ftdi_error_return(-10, "unable to close device");
continue;
}
}
- if (usb_close (ftdi->usb_dev) != 0)
+ if (ftdi_usb_close_internal (ftdi) != 0)
ftdi_error_return(-10, "unable to close device");
return ftdi_usb_open_dev(ftdi, dev);
return 0;
}
+
+
/**
Closes the ftdi device. Call ftdi_deinit() if you're cleaning up.
ftdi_async_complete(ftdi,1);
#endif
- if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0)
- rtn = -1;
+ if (ftdi->usb_dev != NULL)
+ if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0)
+ rtn = -1;
- if (usb_close (ftdi->usb_dev) != 0)
+ if (ftdi_usb_close_internal (ftdi) != 0)
rtn = -2;
return rtn;
}
// Split into "value" and "index" values
*value = (unsigned short)(encoded_divisor & 0xFFFF);
- if (ftdi->type == TYPE_2232C)
+ if (ftdi->type == TYPE_2232C || ftdi->type == TYPE_2232H || ftdi->type == TYPE_4232H)
{
*index = (unsigned short)(encoded_divisor >> 8);
*index &= 0xFF00;
}
#ifdef LIBFTDI_LINUX_ASYNC_MODE
+#ifdef USB_CLASS_PTP
+#error LIBFTDI_LINUX_ASYNC_MODE is not compatible with libusb-compat-0.1!
+#endif
/* this is strongly dependent on libusb using the same struct layout. If libusb
changes in some later version this may break horribly (this is for libusb 0.1.12) */
struct usb_dev_handle
int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
{
int offset = 0, ret = 1, i, num_of_chunks, chunk_remains;
+ int packet_size = ftdi->max_packet_size;
+
+ // Packet size sanity check (avoid division by zero)
+ if (packet_size == 0)
+ ftdi_error_return(-1, "max_packet_size is bogus (zero)");
// everything we want is still in the readbuffer?
if (size <= ftdi->readbuffer_remaining)
{
// skip FTDI status bytes.
// Maybe stored in the future to enable modem use
- num_of_chunks = ret / 64;
- chunk_remains = ret % 64;
+ num_of_chunks = ret / packet_size;
+ chunk_remains = ret % packet_size;
//printf("ret = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", ret, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
ftdi->readbuffer_offset += 2;
ret -= 2;
- if (ret > 62)
+ if (ret > packet_size - 2)
{
for (i = 1; i < num_of_chunks; i++)
- memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i,
- ftdi->readbuffer+ftdi->readbuffer_offset+64*i,
- 62);
+ memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
+ ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
+ packet_size - 2);
if (chunk_remains > 2)
{
- memmove (ftdi->readbuffer+ftdi->readbuffer_offset+62*i,
- ftdi->readbuffer+ftdi->readbuffer_offset+64*i,
+ memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*i,
+ ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
chunk_remains-2);
ret -= 2*num_of_chunks;
}
Decode binary EEPROM image into an ftdi_eeprom structure.
\param eeprom Pointer to ftdi_eeprom which will be filled in.
- \param output Buffer of \a size bytes of raw eeprom data
+ \param buf Buffer of \a size bytes of raw eeprom data
\param size size size of eeprom data in bytes
\retval 0: all fine
}
/**
+ Read eeprom location
+
+ \param ftdi pointer to ftdi_context
+ \param eeprom_addr Address of eeprom location to be read
+ \param eeprom_val Pointer to store read eeprom location
+
+ \retval 0: all fine
+ \retval -1: read failed
+*/
+int ftdi_read_eeprom_location (struct ftdi_context *ftdi, int eeprom_addr, unsigned short *eeprom_val)
+{
+ if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, eeprom_addr, (char *)eeprom_val, 2, ftdi->usb_read_timeout) != 2)
+ ftdi_error_return(-1, "reading eeprom failed");
+
+ return 0;
+}
+
+/**
Read eeprom
\param ftdi pointer to ftdi_context
}
/**
+ Write eeprom location
+
+ \param ftdi pointer to ftdi_context
+ \param eeprom_addr Address of eeprom location to be written
+ \param eeprom_val Value to be written
+
+ \retval 0: all fine
+ \retval -1: read failed
+*/
+int ftdi_write_eeprom_location(struct ftdi_context *ftdi, int eeprom_addr, unsigned short eeprom_val)
+{
+ if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_WRITE_EEPROM_REQUEST, eeprom_val, eeprom_addr,
+ NULL, 0, ftdi->usb_write_timeout) != 0)
+ ftdi_error_return(-1, "unable to write eeprom");
+
+ return 0;
+}
+
+/**
Write eeprom
\param ftdi pointer to ftdi_context
git://developer.intra2net.com / libftdi / blobdiff