ftdi.c - description
-------------------
begin : Fri Apr 4 2003
- copyright : (C) 2003-2008 by Intra2net AG
+ copyright : (C) 2003-2010 by Intra2net AG
email : opensource@intra2net.com
***************************************************************************/
/** \addtogroup libftdi */
/* @{ */
-#include <usb.h>
+#include <libusb.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
+#include <stdlib.h>
#include "ftdi.h"
-/* stuff needed for async write */
-#ifdef LIBFTDI_LINUX_ASYNC_MODE
-#include <sys/ioctl.h>
-#include <sys/time.h>
-#include <sys/select.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <linux/usbdevice_fs.h>
-#endif
-
#define ftdi_error_return(code, str) do { \
ftdi->error_str = str; \
return code; \
} while(0);
+#define ftdi_error_return_free_device_list(code, str, devs) do { \
+ libusb_free_device_list(devs,1); \
+ ftdi->error_str = str; \
+ return code; \
+ } while(0);
+
+
/**
Internal function to close usb device pointer.
Sets ftdi->usb_dev to NULL.
\param ftdi pointer to ftdi_context
- \retval zero if all is fine, otherwise error code from usb_close()
+ \retval none
*/
-static int ftdi_usb_close_internal (struct ftdi_context *ftdi)
+static void ftdi_usb_close_internal (struct ftdi_context *ftdi)
{
- int ret = 0;
-
- if (ftdi->usb_dev)
+ if (ftdi && ftdi->usb_dev)
{
- ret = usb_close (ftdi->usb_dev);
+ libusb_close (ftdi->usb_dev);
ftdi->usb_dev = NULL;
}
-
- return ret;
}
/**
\retval 0: all fine
\retval -1: couldn't allocate read buffer
+ \retval -2: couldn't allocate struct buffer
\remark This should be called before all functions
*/
int ftdi_init(struct ftdi_context *ftdi)
{
- unsigned int i;
-
+ struct ftdi_eeprom* eeprom = (struct ftdi_eeprom *)malloc(sizeof(struct ftdi_eeprom));
+ ftdi->usb_ctx = NULL;
ftdi->usb_dev = NULL;
ftdi->usb_read_timeout = 5000;
ftdi->usb_write_timeout = 5000;
ftdi->type = TYPE_BM; /* chip type */
ftdi->baudrate = -1;
- ftdi->bitbang_enabled = 0;
+ ftdi->bitbang_enabled = 0; /* 0: normal mode 1: any of the bitbang modes enabled */
ftdi->readbuffer = NULL;
ftdi->readbuffer_offset = 0;
ftdi->index = 0;
ftdi->in_ep = 0x02;
ftdi->out_ep = 0x81;
- ftdi->bitbang_mode = 1; /* 1: Normal bitbang mode, 2: SPI bitbang mode */
+ ftdi->bitbang_mode = 1; /* when bitbang is enabled this holds the number of the mode */
ftdi->error_str = NULL;
-#ifdef LIBFTDI_LINUX_ASYNC_MODE
- ftdi->async_usb_buffer_size=10;
- if ((ftdi->async_usb_buffer=malloc(sizeof(struct usbdevfs_urb)*ftdi->async_usb_buffer_size)) == NULL)
- ftdi_error_return(-1, "out of memory for async usb buffer");
-
- /* initialize async usb buffer with unused-marker */
- for (i=0; i < ftdi->async_usb_buffer_size; i++)
- ((struct usbdevfs_urb*)ftdi->async_usb_buffer)[i].usercontext = FTDI_URB_USERCONTEXT_COOKIE;
-#else
- ftdi->async_usb_buffer_size=0;
- ftdi->async_usb_buffer = NULL;
-#endif
-
- ftdi->eeprom_size = FTDI_DEFAULT_EEPROM_SIZE;
+ if (eeprom == 0)
+ ftdi_error_return(-2, "Can't malloc struct ftdi_eeprom");
+ memset(eeprom, 0, sizeof(struct ftdi_eeprom));
+ ftdi->eeprom = eeprom;
/* All fine. Now allocate the readbuffer */
return ftdi_read_data_set_chunksize(ftdi, 4096);
\retval 0: all fine
\retval -1: unknown interface
+ \retval -2: USB device unavailable
*/
int ftdi_set_interface(struct ftdi_context *ftdi, enum ftdi_interface interface)
{
+ if (ftdi == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
switch (interface)
{
case INTERFACE_ANY:
*/
void ftdi_deinit(struct ftdi_context *ftdi)
{
- ftdi_usb_close_internal (ftdi);
+ if (ftdi == NULL)
+ return;
- if (ftdi->async_usb_buffer != NULL)
- {
- free(ftdi->async_usb_buffer);
- ftdi->async_usb_buffer = NULL;
- }
+ ftdi_usb_close_internal (ftdi);
if (ftdi->readbuffer != NULL)
{
free(ftdi->readbuffer);
ftdi->readbuffer = NULL;
}
+
+ if (ftdi->eeprom != NULL)
+ {
+ if (ftdi->eeprom->manufacturer != 0)
+ {
+ free(ftdi->eeprom->manufacturer);
+ ftdi->eeprom->manufacturer = 0;
+ }
+ if (ftdi->eeprom->product != 0)
+ {
+ free(ftdi->eeprom->product);
+ ftdi->eeprom->product = 0;
+ }
+ if (ftdi->eeprom->serial != 0)
+ {
+ free(ftdi->eeprom->serial);
+ ftdi->eeprom->serial = 0;
+ }
+ free(ftdi->eeprom);
+ ftdi->eeprom = NULL;
+ }
+ libusb_exit(ftdi->usb_ctx);
}
/**
Use an already open libusb device.
\param ftdi pointer to ftdi_context
- \param usb libusb usb_dev_handle to use
+ \param usb libusb libusb_device_handle to use
*/
-void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb)
+void ftdi_set_usbdev (struct ftdi_context *ftdi, libusb_device_handle *usb)
{
+ if (ftdi == NULL)
+ return;
+
ftdi->usb_dev = usb;
}
\param product Product ID to search for
\retval >0: number of devices found
- \retval -1: usb_find_busses() failed
- \retval -2: usb_find_devices() failed
\retval -3: out of memory
+ \retval -4: libusb_init() failed
+ \retval -5: libusb_get_device_list() failed
+ \retval -6: libusb_get_device_descriptor() failed
*/
int ftdi_usb_find_all(struct ftdi_context *ftdi, struct ftdi_device_list **devlist, int vendor, int product)
{
struct ftdi_device_list **curdev;
- struct usb_bus *bus;
- struct usb_device *dev;
+ libusb_device *dev;
+ libusb_device **devs;
int count = 0;
+ int i = 0;
+
+ if (libusb_init(&ftdi->usb_ctx) < 0)
+ ftdi_error_return(-4, "libusb_init() failed");
- usb_init();
- if (usb_find_busses() < 0)
- ftdi_error_return(-1, "usb_find_busses() failed");
- if (usb_find_devices() < 0)
- ftdi_error_return(-2, "usb_find_devices() failed");
+ if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
+ ftdi_error_return(-5, "libusb_get_device_list() failed");
curdev = devlist;
*curdev = NULL;
- for (bus = usb_get_busses(); bus; bus = bus->next)
+
+ while ((dev = devs[i++]) != NULL)
{
- for (dev = bus->devices; dev; dev = dev->next)
- {
- if (dev->descriptor.idVendor == vendor
- && dev->descriptor.idProduct == product)
- {
- *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list));
- if (!*curdev)
- ftdi_error_return(-3, "out of memory");
+ struct libusb_device_descriptor desc;
- (*curdev)->next = NULL;
- (*curdev)->dev = dev;
+ if (libusb_get_device_descriptor(dev, &desc) < 0)
+ ftdi_error_return(-6, "libusb_get_device_descriptor() failed");
- curdev = &(*curdev)->next;
- count++;
- }
+ if (desc.idVendor == vendor && desc.idProduct == product)
+ {
+ *curdev = (struct ftdi_device_list*)malloc(sizeof(struct ftdi_device_list));
+ if (!*curdev)
+ ftdi_error_return(-3, "out of memory");
+
+ (*curdev)->next = NULL;
+ (*curdev)->dev = dev;
+
+ curdev = &(*curdev)->next;
+ count++;
}
}
\retval -7: get product manufacturer failed
\retval -8: get product description failed
\retval -9: get serial number failed
- \retval -10: unable to close device
+ \retval -11: libusb_get_device_descriptor() failed
*/
-int ftdi_usb_get_strings(struct ftdi_context * ftdi, struct usb_device * dev,
+int ftdi_usb_get_strings(struct ftdi_context * ftdi, struct libusb_device * dev,
char * manufacturer, int mnf_len, char * description, int desc_len, char * serial, int serial_len)
{
+ struct libusb_device_descriptor desc;
+
if ((ftdi==NULL) || (dev==NULL))
return -1;
- if (!(ftdi->usb_dev = usb_open(dev)))
- ftdi_error_return(-4, usb_strerror());
+ if (libusb_open(dev, &ftdi->usb_dev) < 0)
+ ftdi_error_return(-4, "libusb_open() failed");
+
+ if (libusb_get_device_descriptor(dev, &desc) < 0)
+ ftdi_error_return(-11, "libusb_get_device_descriptor() failed");
if (manufacturer != NULL)
{
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iManufacturer, manufacturer, mnf_len) <= 0)
+ if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iManufacturer, (unsigned char *)manufacturer, mnf_len) < 0)
{
ftdi_usb_close_internal (ftdi);
- ftdi_error_return(-7, usb_strerror());
+ ftdi_error_return(-7, "libusb_get_string_descriptor_ascii() failed");
}
}
if (description != NULL)
{
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, description, desc_len) <= 0)
+ if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)description, desc_len) < 0)
{
ftdi_usb_close_internal (ftdi);
- ftdi_error_return(-8, usb_strerror());
+ ftdi_error_return(-8, "libusb_get_string_descriptor_ascii() failed");
}
}
if (serial != NULL)
{
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, serial, serial_len) <= 0)
+ if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)serial, serial_len) < 0)
{
ftdi_usb_close_internal (ftdi);
- ftdi_error_return(-9, usb_strerror());
+ ftdi_error_return(-9, "libusb_get_string_descriptor_ascii() failed");
}
}
- if (ftdi_usb_close_internal (ftdi) != 0)
- ftdi_error_return(-10, usb_strerror());
+ ftdi_usb_close_internal (ftdi);
return 0;
}
* \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)
+static unsigned int _ftdi_determine_max_packet_size(struct ftdi_context *ftdi, libusb_device *dev)
{
+ struct libusb_device_descriptor desc;
+ struct libusb_config_descriptor *config0;
unsigned int packet_size;
+ // Sanity check
+ if (ftdi == NULL || dev == NULL)
+ return 64;
+
// 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.
else
packet_size = 64;
- if (dev->descriptor.bNumConfigurations > 0 && dev->config)
- {
- struct usb_config_descriptor config = dev->config[0];
+ if (libusb_get_device_descriptor(dev, &desc) < 0)
+ return packet_size;
+
+ if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
+ return packet_size;
- if (ftdi->interface < config.bNumInterfaces)
+ if (desc.bNumConfigurations > 0)
+ {
+ if (ftdi->interface < config0->bNumInterfaces)
{
- struct usb_interface interface = config.interface[ftdi->interface];
+ struct libusb_interface interface = config0->interface[ftdi->interface];
if (interface.num_altsetting > 0)
{
- struct usb_interface_descriptor descriptor = interface.altsetting[0];
+ struct libusb_interface_descriptor descriptor = interface.altsetting[0];
if (descriptor.bNumEndpoints > 0)
{
packet_size = descriptor.endpoint[0].wMaxPacketSize;
}
}
+ libusb_free_config_descriptor (config0);
return packet_size;
}
/**
- Opens a ftdi device given by a usb_device.
+ Opens a ftdi device given by an usb_device.
\param ftdi pointer to ftdi_context
\param dev libusb usb_dev to use
\retval -5: unable to claim device
\retval -6: reset failed
\retval -7: set baudrate failed
+ \retval -8: ftdi context invalid
+ \retval -9: libusb_get_device_descriptor() failed
+ \retval -10: libusb_get_config_descriptor() failed
+ \retval -11: libusb_etach_kernel_driver() failed
+ \retval -12: libusb_get_configuration() failed
*/
-int ftdi_usb_open_dev(struct ftdi_context *ftdi, struct usb_device *dev)
+int ftdi_usb_open_dev(struct ftdi_context *ftdi, libusb_device *dev)
{
- int detach_errno = 0;
- int config_val = 1;
- if (!(ftdi->usb_dev = usb_open(dev)))
- ftdi_error_return(-4, "usb_open() failed");
+ struct libusb_device_descriptor desc;
+ struct libusb_config_descriptor *config0;
+ int cfg, cfg0, detach_errno = 0;
+
+ if (ftdi == NULL)
+ ftdi_error_return(-8, "ftdi context invalid");
+
+ if (libusb_open(dev, &ftdi->usb_dev) < 0)
+ ftdi_error_return(-4, "libusb_open() failed");
+
+ if (libusb_get_device_descriptor(dev, &desc) < 0)
+ ftdi_error_return(-9, "libusb_get_device_descriptor() failed");
+
+ if (libusb_get_config_descriptor(dev, 0, &config0) < 0)
+ ftdi_error_return(-10, "libusb_get_config_descriptor() failed");
+ cfg0 = config0->bConfigurationValue;
+ libusb_free_config_descriptor (config0);
-#ifdef LIBUSB_HAS_GET_DRIVER_NP
// Try to detach ftdi_sio kernel module.
- // Returns ENODATA if driver is not loaded.
//
// The return code is kept in a separate variable and only parsed
// if usb_set_configuration() or usb_claim_interface() fails as the
// detach operation might be denied and everything still works fine.
// Likely scenario is a static ftdi_sio kernel module.
- if (usb_detach_kernel_driver_np(ftdi->usb_dev, ftdi->interface) != 0 && errno != ENODATA)
+ if (libusb_detach_kernel_driver(ftdi->usb_dev, ftdi->interface) !=0)
detach_errno = errno;
-#endif
-#ifdef __WIN32__
+ if (libusb_get_configuration (ftdi->usb_dev, &cfg) < 0)
+ ftdi_error_return(-12, "libusb_get_configuration () failed");
// 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)
+ if (desc.bNumConfigurations > 0 && cfg != cfg0)
{
- // 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)
+ if (libusb_set_configuration(ftdi->usb_dev, cfg0) < 0)
{
ftdi_usb_close_internal (ftdi);
- if (detach_errno == EPERM)
+ 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!");
+ ftdi_error_return(-3, "unable to set usb configuration. Make sure the default FTDI driver is not in use");
}
}
}
-#endif
- if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0)
+ if (libusb_claim_interface(ftdi->usb_dev, ftdi->interface) < 0)
{
ftdi_usb_close_internal (ftdi);
- if (detach_errno == EPERM)
+ if(detach_errno == EPERM)
{
ftdi_error_return(-8, "inappropriate permissions on device!");
}
else
{
- ftdi_error_return(-5, "unable to claim usb device. Make sure ftdi_sio is unloaded!");
+ ftdi_error_return(-5, "unable to claim usb device. Make sure the default FTDI driver is not in use");
}
}
// 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
- && dev->descriptor.iSerialNumber == 0))
+ if (desc.bcdDevice == 0x400 || (desc.bcdDevice == 0x200
+ && desc.iSerialNumber == 0))
ftdi->type = TYPE_BM;
- else if (dev->descriptor.bcdDevice == 0x200)
+ else if (desc.bcdDevice == 0x200)
ftdi->type = TYPE_AM;
- else if (dev->descriptor.bcdDevice == 0x500)
+ else if (desc.bcdDevice == 0x500)
ftdi->type = TYPE_2232C;
- else if (dev->descriptor.bcdDevice == 0x600)
+ else if (desc.bcdDevice == 0x600)
ftdi->type = TYPE_R;
- else if (dev->descriptor.bcdDevice == 0x700)
+ else if (desc.bcdDevice == 0x700)
ftdi->type = TYPE_2232H;
- else if (dev->descriptor.bcdDevice == 0x800)
+ else if (desc.bcdDevice == 0x800)
ftdi->type = TYPE_4232H;
// Set default interface on dual/quad type chips
\param serial Serial to search for. Use NULL if not needed.
\retval 0: all fine
+ \retval -3: usb device not found
+ \retval -4: unable to open device
+ \retval -5: unable to claim device
+ \retval -6: reset failed
+ \retval -7: set baudrate failed
+ \retval -8: get product description failed
+ \retval -9: get serial number failed
+ \retval -11: libusb_init() failed
+ \retval -12: libusb_get_device_list() failed
+ \retval -13: libusb_get_device_descriptor() failed
+*/
+int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
+ const char* description, const char* serial)
+{
+ return ftdi_usb_open_desc_index(ftdi,vendor,product,description,serial,0);
+}
+
+/**
+ Opens the index-th device with a given, vendor id, product id,
+ description and serial.
+
+ \param ftdi pointer to ftdi_context
+ \param vendor Vendor ID
+ \param product Product ID
+ \param description Description to search for. Use NULL if not needed.
+ \param serial Serial to search for. Use NULL if not needed.
+ \param index Number of matching device to open if there are more than one, starts with 0.
+
+ \retval 0: all fine
\retval -1: usb_find_busses() failed
\retval -2: usb_find_devices() failed
\retval -3: usb device not found
\retval -8: get product description failed
\retval -9: get serial number failed
\retval -10: unable to close device
+ \retval -11: ftdi context invalid
*/
-int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
- const char* description, const char* serial)
+int ftdi_usb_open_desc_index(struct ftdi_context *ftdi, int vendor, int product,
+ const char* description, const char* serial, unsigned int index)
{
- struct usb_bus *bus;
- struct usb_device *dev;
+ libusb_device *dev;
+ libusb_device **devs;
char string[256];
+ int i = 0;
- usb_init();
+ if (libusb_init(&ftdi->usb_ctx) < 0)
+ ftdi_error_return(-11, "libusb_init() failed");
- if (usb_find_busses() < 0)
- ftdi_error_return(-1, "usb_find_busses() failed");
- if (usb_find_devices() < 0)
- ftdi_error_return(-2, "usb_find_devices() failed");
+ if (ftdi == NULL)
+ ftdi_error_return(-11, "ftdi context invalid");
- for (bus = usb_get_busses(); bus; bus = bus->next)
+ if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
+ ftdi_error_return(-12, "libusb_get_device_list() failed");
+
+ while ((dev = devs[i++]) != NULL)
{
- for (dev = bus->devices; dev; dev = dev->next)
+ struct libusb_device_descriptor desc;
+ int res;
+
+ if (libusb_get_device_descriptor(dev, &desc) < 0)
+ ftdi_error_return_free_device_list(-13, "libusb_get_device_descriptor() failed", devs);
+
+ if (desc.idVendor == vendor && desc.idProduct == product)
{
- if (dev->descriptor.idVendor == vendor
- && dev->descriptor.idProduct == product)
- {
- if (!(ftdi->usb_dev = usb_open(dev)))
- ftdi_error_return(-4, "usb_open() failed");
+ if (libusb_open(dev, &ftdi->usb_dev) < 0)
+ ftdi_error_return_free_device_list(-4, "usb_open() failed", devs);
- if (description != NULL)
+ if (description != NULL)
+ {
+ if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iProduct, (unsigned char *)string, sizeof(string)) < 0)
+ {
+ libusb_close (ftdi->usb_dev);
+ ftdi_error_return_free_device_list(-8, "unable to fetch product description", devs);
+ }
+ if (strncmp(string, description, sizeof(string)) != 0)
+ {
+ libusb_close (ftdi->usb_dev);
+ continue;
+ }
+ }
+ if (serial != NULL)
+ {
+ if (libusb_get_string_descriptor_ascii(ftdi->usb_dev, desc.iSerialNumber, (unsigned char *)string, sizeof(string)) < 0)
{
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, string, sizeof(string)) <= 0)
- {
- ftdi_usb_close_internal (ftdi);
- ftdi_error_return(-8, "unable to fetch product description");
- }
- if (strncmp(string, description, sizeof(string)) != 0)
- {
- if (ftdi_usb_close_internal (ftdi) != 0)
- ftdi_error_return(-10, "unable to close device");
- continue;
- }
+ ftdi_usb_close_internal (ftdi);
+ ftdi_error_return_free_device_list(-9, "unable to fetch serial number", devs);
}
- if (serial != NULL)
+ if (strncmp(string, serial, sizeof(string)) != 0)
{
- if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, string, sizeof(string)) <= 0)
- {
- ftdi_usb_close_internal (ftdi);
- ftdi_error_return(-9, "unable to fetch serial number");
- }
- if (strncmp(string, serial, sizeof(string)) != 0)
- {
- if (ftdi_usb_close_internal (ftdi) != 0)
- ftdi_error_return(-10, "unable to close device");
- continue;
- }
+ ftdi_usb_close_internal (ftdi);
+ continue;
}
+ }
- if (ftdi_usb_close_internal (ftdi) != 0)
- ftdi_error_return(-10, "unable to close device");
+ ftdi_usb_close_internal (ftdi);
- return ftdi_usb_open_dev(ftdi, dev);
- }
+ if (index > 0)
+ {
+ index--;
+ continue;
+ }
+
+ res = ftdi_usb_open_dev(ftdi, dev);
+ libusb_free_device_list(devs,1);
+ return res;
}
}
// device not found
- ftdi_error_return(-3, "device not found");
+ ftdi_error_return_free_device_list(-3, "device not found", devs);
+}
+
+/**
+ Opens the ftdi-device described by a description-string.
+ Intended to be used for parsing a device-description given as commandline argument.
+
+ \param ftdi pointer to ftdi_context
+ \param description NULL-terminated description-string, using this format:
+ \li <tt>d:\<devicenode></tt> path of bus and device-node (e.g. "003/001") within usb device tree (usually at /proc/bus/usb/)
+ \li <tt>i:\<vendor>:\<product></tt> first device with given vendor and product id, ids can be decimal, octal (preceded by "0") or hex (preceded by "0x")
+ \li <tt>i:\<vendor>:\<product>:\<index></tt> as above with index being the number of the device (starting with 0) if there are more than one
+ \li <tt>s:\<vendor>:\<product>:\<serial></tt> first device with given vendor id, product id and serial string
+
+ \note The description format may be extended in later versions.
+
+ \retval 0: all fine
+ \retval -1: libusb_init() failed
+ \retval -2: libusb_get_device_list() failed
+ \retval -3: usb device not found
+ \retval -4: unable to open device
+ \retval -5: unable to claim device
+ \retval -6: reset failed
+ \retval -7: set baudrate failed
+ \retval -8: get product description failed
+ \retval -9: get serial number failed
+ \retval -10: unable to close device
+ \retval -11: illegal description format
+ \retval -12: ftdi context invalid
+*/
+int ftdi_usb_open_string(struct ftdi_context *ftdi, const char* description)
+{
+ if (ftdi == NULL)
+ ftdi_error_return(-12, "ftdi context invalid");
+
+ if (description[0] == 0 || description[1] != ':')
+ ftdi_error_return(-11, "illegal description format");
+
+ if (description[0] == 'd')
+ {
+ libusb_device *dev;
+ libusb_device **devs;
+ unsigned int bus_number, device_address;
+ int i = 0;
+
+ if (libusb_init (&ftdi->usb_ctx) < 0)
+ ftdi_error_return(-1, "libusb_init() failed");
+
+ if (libusb_get_device_list(ftdi->usb_ctx, &devs) < 0)
+ ftdi_error_return(-2, "libusb_get_device_list() failed");
+
+ /* XXX: This doesn't handle symlinks/odd paths/etc... */
+ if (sscanf (description + 2, "%u/%u", &bus_number, &device_address) != 2)
+ ftdi_error_return_free_device_list(-11, "illegal description format", devs);
+
+ while ((dev = devs[i++]) != NULL)
+ {
+ int ret;
+ if (bus_number == libusb_get_bus_number (dev)
+ && device_address == libusb_get_device_address (dev))
+ {
+ ret = ftdi_usb_open_dev(ftdi, dev);
+ libusb_free_device_list(devs,1);
+ return ret;
+ }
+ }
+
+ // device not found
+ ftdi_error_return_free_device_list(-3, "device not found", devs);
+ }
+ else if (description[0] == 'i' || description[0] == 's')
+ {
+ unsigned int vendor;
+ unsigned int product;
+ unsigned int index=0;
+ const char *serial=NULL;
+ const char *startp, *endp;
+
+ errno=0;
+ startp=description+2;
+ vendor=strtoul((char*)startp,(char**)&endp,0);
+ if (*endp != ':' || endp == startp || errno != 0)
+ ftdi_error_return(-11, "illegal description format");
+
+ startp=endp+1;
+ product=strtoul((char*)startp,(char**)&endp,0);
+ if (endp == startp || errno != 0)
+ ftdi_error_return(-11, "illegal description format");
+
+ if (description[0] == 'i' && *endp != 0)
+ {
+ /* optional index field in i-mode */
+ if (*endp != ':')
+ ftdi_error_return(-11, "illegal description format");
+
+ startp=endp+1;
+ index=strtoul((char*)startp,(char**)&endp,0);
+ if (*endp != 0 || endp == startp || errno != 0)
+ ftdi_error_return(-11, "illegal description format");
+ }
+ if (description[0] == 's')
+ {
+ if (*endp != ':')
+ ftdi_error_return(-11, "illegal description format");
+
+ /* rest of the description is the serial */
+ serial=endp+1;
+ }
+
+ return ftdi_usb_open_desc_index(ftdi, vendor, product, NULL, serial, index);
+ }
+ else
+ {
+ ftdi_error_return(-11, "illegal description format");
+ }
}
/**
\retval 0: all fine
\retval -1: FTDI reset failed
+ \retval -2: USB device unavailable
*/
int ftdi_usb_reset(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_RESET_REQUEST, SIO_RESET_SIO,
- ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ 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_RESET_REQUEST, SIO_RESET_SIO,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1,"FTDI reset failed");
// Invalidate data in the readbuffer
\retval 0: all fine
\retval -1: read buffer purge failed
+ \retval -2: USB device unavailable
*/
int ftdi_usb_purge_rx_buffer(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_RESET_REQUEST, SIO_RESET_PURGE_RX,
- ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ 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_RESET_REQUEST, SIO_RESET_PURGE_RX,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "FTDI purge of RX buffer failed");
// Invalidate data in the readbuffer
\retval 0: all fine
\retval -1: write buffer purge failed
+ \retval -2: USB device unavailable
*/
int ftdi_usb_purge_tx_buffer(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_RESET_REQUEST, SIO_RESET_PURGE_TX,
- ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ 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_RESET_REQUEST, SIO_RESET_PURGE_TX,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "FTDI purge of TX buffer failed");
return 0;
\retval 0: all fine
\retval -1: read buffer purge failed
\retval -2: write buffer purge failed
+ \retval -3: USB device unavailable
*/
int ftdi_usb_purge_buffers(struct ftdi_context *ftdi)
{
int result;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-3, "USB device unavailable");
+
result = ftdi_usb_purge_rx_buffer(ftdi);
if (result < 0)
return -1;
\retval 0: all fine
\retval -1: usb_release failed
- \retval -2: usb_close failed
+ \retval -3: ftdi context invalid
*/
int ftdi_usb_close(struct ftdi_context *ftdi)
{
int rtn = 0;
-#ifdef LIBFTDI_LINUX_ASYNC_MODE
- /* try to release some kernel resources */
- ftdi_async_complete(ftdi,1);
-#endif
+ if (ftdi == NULL)
+ ftdi_error_return(-3, "ftdi context invalid");
if (ftdi->usb_dev != NULL)
- if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0)
+ if (libusb_release_interface(ftdi->usb_dev, ftdi->interface) < 0)
rtn = -1;
- if (ftdi_usb_close_internal (ftdi) != 0)
- rtn = -2;
+ ftdi_usb_close_internal (ftdi);
return rtn;
}
-/*
+/**
ftdi_convert_baudrate returns nearest supported baud rate to that requested.
Function is only used internally
\internal
\retval 0: all fine
\retval -1: invalid baudrate
\retval -2: setting baudrate failed
+ \retval -3: USB device unavailable
*/
int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate)
{
unsigned short value, index;
int actual_baudrate;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-3, "USB device unavailable");
+
if (ftdi->bitbang_enabled)
{
baudrate = baudrate*4;
: (baudrate * 21 < actual_baudrate * 20)))
ftdi_error_return (-1, "Unsupported baudrate. Note: bitbang baudrates are automatically multiplied by 4");
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_BAUDRATE_REQUEST, value,
- index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_SET_BAUDRATE_REQUEST, value,
+ index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return (-2, "Setting new baudrate failed");
ftdi->baudrate = baudrate;
\retval 0: all fine
\retval -1: Setting line property failed
+ \retval -2: USB device unavailable
*/
int ftdi_set_line_property2(struct ftdi_context *ftdi, enum ftdi_bits_type bits,
enum ftdi_stopbits_type sbit, enum ftdi_parity_type parity,
{
unsigned short value = bits;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
switch (parity)
{
case NONE:
break;
}
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_DATA_REQUEST, value,
- ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_SET_DATA_REQUEST, value,
+ ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return (-1, "Setting new line property failed");
return 0;
\param buf Buffer with the data
\param size Size of the buffer
+ \retval -666: USB device unavailable
\retval <0: error code from usb_bulk_write()
\retval >0: number of bytes written
*/
int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
{
- int ret;
int offset = 0;
- int total_written = 0;
+ int actual_length;
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-666, "USB device unavailable");
while (offset < size)
{
if (offset+write_size > size)
write_size = size-offset;
- ret = usb_bulk_write(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, ftdi->usb_write_timeout);
- if (ret < 0)
- ftdi_error_return(ret, "usb bulk write failed");
+ if (libusb_bulk_transfer(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, &actual_length, ftdi->usb_write_timeout) < 0)
+ ftdi_error_return(-1, "usb bulk write failed");
- total_written += ret;
- offset += write_size;
+ offset += actual_length;
}
- return total_written;
+ return offset;
}
-#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
+static void ftdi_read_data_cb(struct libusb_transfer *transfer)
{
- int fd;
- // some other stuff coming here we don't need
-};
+ struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
+ struct ftdi_context *ftdi = tc->ftdi;
+ int packet_size, actual_length, num_of_chunks, chunk_remains, i, ret;
-/**
- Check for pending async urbs
- \internal
-*/
-static int _usb_get_async_urbs_pending(struct ftdi_context *ftdi)
-{
- struct usbdevfs_urb *urb;
- int pending=0;
- unsigned int i;
+ packet_size = ftdi->max_packet_size;
+
+ actual_length = transfer->actual_length;
- for (i=0; i < ftdi->async_usb_buffer_size; i++)
+ if (actual_length > 2)
{
- urb=&((struct usbdevfs_urb *)(ftdi->async_usb_buffer))[i];
- if (urb->usercontext != FTDI_URB_USERCONTEXT_COOKIE)
- pending++;
+ // skip FTDI status bytes.
+ // Maybe stored in the future to enable modem use
+ num_of_chunks = actual_length / packet_size;
+ chunk_remains = actual_length % packet_size;
+ //printf("actual_length = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", actual_length, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
+
+ ftdi->readbuffer_offset += 2;
+ actual_length -= 2;
+
+ if (actual_length > packet_size - 2)
+ {
+ for (i = 1; i < num_of_chunks; i++)
+ 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+(packet_size - 2)*i,
+ ftdi->readbuffer+ftdi->readbuffer_offset+packet_size*i,
+ chunk_remains-2);
+ actual_length -= 2*num_of_chunks;
+ }
+ else
+ actual_length -= 2*(num_of_chunks-1)+chunk_remains;
+ }
+
+ if (actual_length > 0)
+ {
+ // data still fits in buf?
+ if (tc->offset + actual_length <= tc->size)
+ {
+ memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, actual_length);
+ //printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
+ tc->offset += actual_length;
+
+ ftdi->readbuffer_offset = 0;
+ ftdi->readbuffer_remaining = 0;
+
+ /* Did we read exactly the right amount of bytes? */
+ if (tc->offset == tc->size)
+ {
+ //printf("read_data exact rem %d offset %d\n",
+ //ftdi->readbuffer_remaining, offset);
+ tc->completed = 1;
+ return;
+ }
+ }
+ else
+ {
+ // only copy part of the data or size <= readbuffer_chunksize
+ int part_size = tc->size - tc->offset;
+ memcpy (tc->buf + tc->offset, ftdi->readbuffer + ftdi->readbuffer_offset, part_size);
+ tc->offset += part_size;
+
+ ftdi->readbuffer_offset += part_size;
+ ftdi->readbuffer_remaining = actual_length - part_size;
+
+ /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
+ part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
+ tc->completed = 1;
+ return;
+ }
+ }
}
+ ret = libusb_submit_transfer (transfer);
+ if (ret < 0)
+ tc->completed = 1;
+}
- return pending;
+
+static void ftdi_write_data_cb(struct libusb_transfer *transfer)
+{
+ struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
+ struct ftdi_context *ftdi = tc->ftdi;
+
+ tc->offset += transfer->actual_length;
+
+ if (tc->offset == tc->size)
+ {
+ tc->completed = 1;
+ }
+ else
+ {
+ int write_size = ftdi->writebuffer_chunksize;
+ int ret;
+
+ if (tc->offset + write_size > tc->size)
+ write_size = tc->size - tc->offset;
+
+ transfer->length = write_size;
+ transfer->buffer = tc->buf + tc->offset;
+ ret = libusb_submit_transfer (transfer);
+ if (ret < 0)
+ tc->completed = 1;
+ }
}
+
/**
- Wait until one or more async URBs are completed by the kernel and mark their
- positions in the async-buffer as unused
+ Writes data to the chip. Does not wait for completion of the transfer
+ nor does it make sure that the transfer was successful.
+
+ Use libusb 1.0 asynchronous API.
\param ftdi pointer to ftdi_context
- \param wait_for_more if != 0 wait for more than one write to complete
- \param timeout_msec max milliseconds to wait
+ \param buf Buffer with the data
+ \param size Size of the buffer
- \internal
+ \retval NULL: Some error happens when submit transfer
+ \retval !NULL: Pointer to a ftdi_transfer_control
*/
-static void _usb_async_cleanup(struct ftdi_context *ftdi, int wait_for_more, int timeout_msec)
+
+struct ftdi_transfer_control *ftdi_write_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
{
- struct timeval tv;
- struct usbdevfs_urb *urb=NULL;
- int ret;
- fd_set writefds;
- int keep_going=0;
+ struct ftdi_transfer_control *tc;
+ struct libusb_transfer *transfer = libusb_alloc_transfer(0);
+ int write_size, ret;
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ {
+ libusb_free_transfer(transfer);
+ return NULL;
+ }
- FD_ZERO(&writefds);
- FD_SET(ftdi->usb_dev->fd, &writefds);
+ tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
- /* init timeout only once, select writes time left after call */
- tv.tv_sec = timeout_msec / 1000;
- tv.tv_usec = (timeout_msec % 1000) * 1000;
+ if (!tc || !transfer)
+ return NULL;
- do
- {
- while (_usb_get_async_urbs_pending(ftdi)
- && (ret = ioctl(ftdi->usb_dev->fd, USBDEVFS_REAPURBNDELAY, &urb)) == -1
- && errno == EAGAIN)
- {
- if (keep_going && !wait_for_more)
- {
- /* don't wait if repeating only for keep_going */
- keep_going=0;
- break;
- }
+ tc->ftdi = ftdi;
+ tc->completed = 0;
+ tc->buf = buf;
+ tc->size = size;
+ tc->offset = 0;
- /* wait for timeout msec or something written ready */
- select(ftdi->usb_dev->fd+1, NULL, &writefds, NULL, &tv);
- }
+ if (size < ftdi->writebuffer_chunksize)
+ write_size = size;
+ else
+ write_size = ftdi->writebuffer_chunksize;
- if (ret == 0 && urb != NULL)
- {
- /* got a free urb, mark it */
- urb->usercontext = FTDI_URB_USERCONTEXT_COOKIE;
+ libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->in_ep, buf,
+ write_size, ftdi_write_data_cb, tc,
+ ftdi->usb_write_timeout);
+ transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
- /* try to get more urbs that are ready now, but don't wait anymore */
- urb=NULL;
- keep_going=1;
- }
- else
- {
- /* no more urbs waiting */
- keep_going=0;
- }
+ ret = libusb_submit_transfer(transfer);
+ if (ret < 0)
+ {
+ libusb_free_transfer(transfer);
+ tc->completed = 1;
+ tc->transfer = NULL;
+ return NULL;
}
- while (keep_going);
+ tc->transfer = transfer;
+
+ return tc;
}
/**
- Wait until one or more async URBs are completed by the kernel and mark their
- positions in the async-buffer as unused.
+ Reads data from the chip. Does not wait for completion of the transfer
+ nor does it make sure that the transfer was successful.
+
+ Use libusb 1.0 asynchronous API.
\param ftdi pointer to ftdi_context
- \param wait_for_more if != 0 wait for more than one write to complete (until write timeout)
-*/
-void ftdi_async_complete(struct ftdi_context *ftdi, int wait_for_more)
-{
- _usb_async_cleanup(ftdi,wait_for_more,ftdi->usb_write_timeout);
-}
+ \param buf Buffer with the data
+ \param size Size of the buffer
-/**
- Stupid libusb does not offer async writes nor does it allow
- access to its fd - so we need some hacks here.
- \internal
+ \retval NULL: Some error happens when submit transfer
+ \retval !NULL: Pointer to a ftdi_transfer_control
*/
-static int _usb_bulk_write_async(struct ftdi_context *ftdi, int ep, char *bytes, int size)
+
+struct ftdi_transfer_control *ftdi_read_data_submit(struct ftdi_context *ftdi, unsigned char *buf, int size)
{
- struct usbdevfs_urb *urb;
- int bytesdone = 0, requested;
- int ret, cleanup_count;
- unsigned int i;
+ struct ftdi_transfer_control *tc;
+ struct libusb_transfer *transfer;
+ int ret;
- do
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ return NULL;
+
+ tc = (struct ftdi_transfer_control *) malloc (sizeof (*tc));
+ if (!tc)
+ return NULL;
+
+ tc->ftdi = ftdi;
+ tc->buf = buf;
+ tc->size = size;
+
+ if (size <= ftdi->readbuffer_remaining)
{
- /* find a free urb buffer we can use */
- urb=NULL;
- for (cleanup_count=0; urb==NULL && cleanup_count <= 1; cleanup_count++)
- {
- if (i==ftdi->async_usb_buffer_size)
- {
- /* wait until some buffers are free */
- _usb_async_cleanup(ftdi,0,ftdi->usb_write_timeout);
- }
+ memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, size);
- for (i=0; i < ftdi->async_usb_buffer_size; i++)
- {
- urb=&((struct usbdevfs_urb *)(ftdi->async_usb_buffer))[i];
- if (urb->usercontext == FTDI_URB_USERCONTEXT_COOKIE)
- break; /* found a free urb position */
- urb=NULL;
- }
- }
+ // Fix offsets
+ ftdi->readbuffer_remaining -= size;
+ ftdi->readbuffer_offset += size;
- /* no free urb position found */
- if (urb==NULL)
- return -1;
+ /* printf("Returning bytes from buffer: %d - remaining: %d\n", size, ftdi->readbuffer_remaining); */
- requested = size - bytesdone;
- if (requested > 4096)
- requested = 4096;
+ tc->completed = 1;
+ tc->offset = size;
+ tc->transfer = NULL;
+ return tc;
+ }
- memset(urb,0,sizeof(urb));
+ tc->completed = 0;
+ if (ftdi->readbuffer_remaining != 0)
+ {
+ memcpy (buf, ftdi->readbuffer+ftdi->readbuffer_offset, ftdi->readbuffer_remaining);
- urb->type = USBDEVFS_URB_TYPE_BULK;
- urb->endpoint = ep;
- urb->flags = 0;
- urb->buffer = bytes + bytesdone;
- urb->buffer_length = requested;
- urb->signr = 0;
- urb->actual_length = 0;
- urb->number_of_packets = 0;
- urb->usercontext = 0;
+ tc->offset = ftdi->readbuffer_remaining;
+ }
+ else
+ tc->offset = 0;
- do
- {
- ret = ioctl(ftdi->usb_dev->fd, USBDEVFS_SUBMITURB, urb);
- }
- while (ret < 0 && errno == EINTR);
- if (ret < 0)
- return ret; /* the caller can read errno to get more info */
+ transfer = libusb_alloc_transfer(0);
+ if (!transfer)
+ {
+ free (tc);
+ return NULL;
+ }
+
+ ftdi->readbuffer_remaining = 0;
+ ftdi->readbuffer_offset = 0;
- bytesdone += requested;
+ libusb_fill_bulk_transfer(transfer, ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi_read_data_cb, tc, ftdi->usb_read_timeout);
+ transfer->type = LIBUSB_TRANSFER_TYPE_BULK;
+
+ ret = libusb_submit_transfer(transfer);
+ if (ret < 0)
+ {
+ libusb_free_transfer(transfer);
+ free (tc);
+ return NULL;
}
- while (bytesdone < size);
- return bytesdone;
+ tc->transfer = transfer;
+
+ return tc;
}
/**
- Writes data in chunks (see ftdi_write_data_set_chunksize()) to the chip.
- Does not wait for completion of the transfer nor does it make sure that
- the transfer was successful.
+ Wait for completion of the transfer.
- This function could be extended to use signals and callbacks to inform the
- caller of completion or error - but this is not done yet, volunteers welcome.
+ Use libusb 1.0 asynchronous API.
- Works around libusb and directly accesses functions only available on Linux.
- Only available if compiled with --with-async-mode.
+ \param tc pointer to ftdi_transfer_control
- \param ftdi pointer to ftdi_context
- \param buf Buffer with the data
- \param size Size of the buffer
-
- \retval <0: error code from usb_bulk_write()
- \retval >0: number of bytes written
+ \retval < 0: Some error happens
+ \retval >= 0: Data size transferred
*/
-int ftdi_write_data_async(struct ftdi_context *ftdi, unsigned char *buf, int size)
+
+int ftdi_transfer_data_done(struct ftdi_transfer_control *tc)
{
int ret;
- int offset = 0;
- int total_written = 0;
- while (offset < size)
+ while (!tc->completed)
{
- int write_size = ftdi->writebuffer_chunksize;
-
- if (offset+write_size > size)
- write_size = size-offset;
-
- ret = _usb_bulk_write_async(ftdi, ftdi->in_ep, buf+offset, write_size);
+ ret = libusb_handle_events(tc->ftdi->usb_ctx);
if (ret < 0)
- ftdi_error_return(ret, "usb bulk write async failed");
-
- total_written += ret;
- offset += write_size;
+ {
+ if (ret == LIBUSB_ERROR_INTERRUPTED)
+ continue;
+ libusb_cancel_transfer(tc->transfer);
+ while (!tc->completed)
+ if (libusb_handle_events(tc->ftdi->usb_ctx) < 0)
+ break;
+ libusb_free_transfer(tc->transfer);
+ free (tc);
+ return ret;
+ }
}
- return total_written;
+ ret = tc->offset;
+ /**
+ * tc->transfer could be NULL if "(size <= ftdi->readbuffer_remaining)"
+ * at ftdi_read_data_submit(). Therefore, we need to check it here.
+ **/
+ if (tc->transfer)
+ {
+ if (tc->transfer->status != LIBUSB_TRANSFER_COMPLETED)
+ ret = -1;
+ libusb_free_transfer(tc->transfer);
+ }
+ free(tc);
+ return ret;
}
-#endif // LIBFTDI_LINUX_ASYNC_MODE
/**
Configure write buffer chunk size.
\param chunksize Chunk size
\retval 0: all fine
+ \retval -1: ftdi context invalid
*/
int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
{
+ if (ftdi == NULL)
+ ftdi_error_return(-1, "ftdi context invalid");
+
ftdi->writebuffer_chunksize = chunksize;
return 0;
}
\param chunksize Pointer to store chunk size in
\retval 0: all fine
+ \retval -1: ftdi context invalid
*/
int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
{
+ if (ftdi == NULL)
+ ftdi_error_return(-1, "ftdi context invalid");
+
*chunksize = ftdi->writebuffer_chunksize;
return 0;
}
\param buf Buffer to store data in
\param size Size of the buffer
- \retval <0: error code from usb_bulk_read()
+ \retval -666: USB device unavailable
+ \retval <0: error code from libusb_bulk_transfer()
\retval 0: no data was available
\retval >0: number of bytes read
- \remark This function is not useful in bitbang mode.
- Use ftdi_read_pins() to get the current state of the pins.
*/
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 offset = 0, ret, i, num_of_chunks, chunk_remains;
int packet_size = ftdi->max_packet_size;
+ int actual_length = 1;
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-666, "USB device unavailable");
// Packet size sanity check (avoid division by zero)
if (packet_size == 0)
offset += ftdi->readbuffer_remaining;
}
// do the actual USB read
- while (offset < size && ret > 0)
+ while (offset < size && actual_length > 0)
{
ftdi->readbuffer_remaining = 0;
ftdi->readbuffer_offset = 0;
/* returns how much received */
- ret = usb_bulk_read (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi->usb_read_timeout);
+ ret = libusb_bulk_transfer (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, &actual_length, ftdi->usb_read_timeout);
if (ret < 0)
ftdi_error_return(ret, "usb bulk read failed");
- if (ret > 2)
+ if (actual_length > 2)
{
// skip FTDI status bytes.
// Maybe stored in the future to enable modem use
- 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);
+ num_of_chunks = actual_length / packet_size;
+ chunk_remains = actual_length % packet_size;
+ //printf("actual_length = %X, num_of_chunks = %X, chunk_remains = %X, readbuffer_offset = %X\n", actual_length, num_of_chunks, chunk_remains, ftdi->readbuffer_offset);
ftdi->readbuffer_offset += 2;
- ret -= 2;
+ actual_length -= 2;
- if (ret > packet_size - 2)
+ if (actual_length > packet_size - 2)
{
for (i = 1; i < num_of_chunks; i++)
memmove (ftdi->readbuffer+ftdi->readbuffer_offset+(packet_size - 2)*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;
+ actual_length -= 2*num_of_chunks;
}
else
- ret -= 2*(num_of_chunks-1)+chunk_remains;
+ actual_length -= 2*(num_of_chunks-1)+chunk_remains;
}
}
- else if (ret <= 2)
+ else if (actual_length <= 2)
{
// no more data to read?
return offset;
}
- if (ret > 0)
+ if (actual_length > 0)
{
// data still fits in buf?
- if (offset+ret <= size)
+ if (offset+actual_length <= size)
{
- memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, ret);
+ memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, actual_length);
//printf("buf[0] = %X, buf[1] = %X\n", buf[0], buf[1]);
- offset += ret;
+ offset += actual_length;
/* Did we read exactly the right amount of bytes? */
if (offset == size)
memcpy (buf+offset, ftdi->readbuffer+ftdi->readbuffer_offset, part_size);
ftdi->readbuffer_offset += part_size;
- ftdi->readbuffer_remaining = ret-part_size;
+ ftdi->readbuffer_remaining = actual_length-part_size;
offset += part_size;
- /* printf("Returning part: %d - size: %d - offset: %d - ret: %d - remaining: %d\n",
- part_size, size, offset, ret, ftdi->readbuffer_remaining); */
+ /* printf("Returning part: %d - size: %d - offset: %d - actual_length: %d - remaining: %d\n",
+ part_size, size, offset, actual_length, ftdi->readbuffer_remaining); */
return offset;
}
\param chunksize Chunk size
\retval 0: all fine
+ \retval -1: ftdi context invalid
*/
int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
{
unsigned char *new_buf;
+ if (ftdi == NULL)
+ ftdi_error_return(-1, "ftdi context invalid");
+
// Invalidate all remaining data
ftdi->readbuffer_offset = 0;
ftdi->readbuffer_remaining = 0;
+#ifdef __linux__
+ /* We can't set readbuffer_chunksize larger than MAX_BULK_BUFFER_LENGTH,
+ which is defined in libusb-1.0. Otherwise, each USB read request will
+ be divided into multiple URBs. This will cause issues on Linux kernel
+ older than 2.6.32. */
+ if (chunksize > 16384)
+ chunksize = 16384;
+#endif
if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL)
ftdi_error_return(-1, "out of memory for readbuffer");
\param chunksize Pointer to store chunk size in
\retval 0: all fine
+ \retval -1: FTDI context invalid
*/
int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
{
+ if (ftdi == NULL)
+ ftdi_error_return(-1, "FTDI context invalid");
+
*chunksize = ftdi->readbuffer_chunksize;
return 0;
}
/**
Enable bitbang mode.
- For advanced bitbang modes of the FT2232C chip use ftdi_set_bitmode().
+ \deprecated use \ref ftdi_set_bitmode with mode BITMODE_BITBANG instead
\param ftdi pointer to ftdi_context
\param bitmask Bitmask to configure lines.
\retval 0: all fine
\retval -1: can't enable bitbang mode
+ \retval -2: USB device unavailable
*/
int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
usb_val = bitmask; // low byte: bitmask
/* FT2232C: Set bitbang_mode to 2 to enable SPI */
usb_val |= (ftdi->bitbang_mode << 8);
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_BITMODE_REQUEST, usb_val, ftdi->index,
- NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_SET_BITMODE_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "unable to enter bitbang mode. Perhaps not a BM type chip?");
ftdi->bitbang_enabled = 1;
\retval 0: all fine
\retval -1: can't disable bitbang mode
+ \retval -2: USB device unavailable
*/
int ftdi_disable_bitbang(struct ftdi_context *ftdi)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ 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_SET_BITMODE_REQUEST, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "unable to leave bitbang mode. Perhaps not a BM type chip?");
ftdi->bitbang_enabled = 0;
}
/**
- Enable advanced bitbang mode for FT2232C chips.
+ Enable/disable bitbang modes.
\param ftdi pointer to ftdi_context
\param bitmask Bitmask to configure lines.
HIGH/ON value configures a line as output.
- \param mode Bitbang mode: 1 for normal mode, 2 for SPI mode
+ \param mode Bitbang mode: use the values defined in \ref ftdi_mpsse_mode
\retval 0: all fine
\retval -1: can't enable bitbang mode
+ \retval -2: USB device unavailable
*/
int ftdi_set_bitmode(struct ftdi_context *ftdi, unsigned char bitmask, unsigned char mode)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
usb_val = bitmask; // low byte: bitmask
usb_val |= (mode << 8);
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_BITMODE_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "unable to configure bitbang mode. Perhaps not a 2232C type chip?");
ftdi->bitbang_mode = mode;
- ftdi->bitbang_enabled = (mode == BITMODE_BITBANG || mode == BITMODE_SYNCBB)?1:0;
+ ftdi->bitbang_enabled = (mode == BITMODE_RESET) ? 0 : 1;
return 0;
}
/**
- Directly read pin state. Useful for bitbang mode.
+ Directly read pin state, circumventing the read buffer. Useful for bitbang mode.
\param ftdi pointer to ftdi_context
\param pins Pointer to store pins into
\retval 0: all fine
\retval -1: read pins failed
+ \retval -2: USB device unavailable
*/
int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_PINS_REQUEST, 0, ftdi->index, (char *)pins, 1, ftdi->usb_read_timeout) != 1)
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_PINS_REQUEST, 0, ftdi->index, (unsigned char *)pins, 1, ftdi->usb_read_timeout) != 1)
ftdi_error_return(-1, "read pins failed");
return 0;
\retval 0: all fine
\retval -1: latency out of range
\retval -2: unable to set latency timer
+ \retval -3: USB device unavailable
*/
int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency)
{
if (latency < 1)
ftdi_error_return(-1, "latency out of range. Only valid for 1-255");
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-3, "USB device unavailable");
+
usb_val = latency;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_LATENCY_TIMER_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_LATENCY_TIMER_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-2, "unable to set latency timer");
return 0;
\retval 0: all fine
\retval -1: unable to get latency timer
+ \retval -2: USB device unavailable
*/
int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency)
{
unsigned short usb_val;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_GET_LATENCY_TIMER_REQUEST, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1)
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_GET_LATENCY_TIMER_REQUEST, 0, ftdi->index, (unsigned char *)&usb_val, 1, ftdi->usb_read_timeout) != 1)
ftdi_error_return(-1, "reading latency timer failed");
*latency = (unsigned char)usb_val;
\retval 0: all fine
\retval -1: unable to retrieve status information
+ \retval -2: USB device unavailable
*/
int ftdi_poll_modem_status(struct ftdi_context *ftdi, unsigned short *status)
{
char usb_val[2];
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_POLL_MODEM_STATUS_REQUEST, 0, ftdi->index, usb_val, 2, ftdi->usb_read_timeout) != 2)
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_POLL_MODEM_STATUS_REQUEST, 0, ftdi->index, (unsigned char *)usb_val, 2, ftdi->usb_read_timeout) != 2)
ftdi_error_return(-1, "getting modem status failed");
*status = (usb_val[1] << 8) | usb_val[0];
\retval 0: all fine
\retval -1: set flow control failed
+ \retval -2: USB device unavailable
*/
int ftdi_setflowctrl(struct ftdi_context *ftdi, int flowctrl)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->index),
- NULL, 0, ftdi->usb_write_timeout) != 0)
+ 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_SET_FLOW_CTRL_REQUEST, 0, (flowctrl | ftdi->index),
+ NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "set flow control failed");
return 0;
\retval 0: all fine
\retval -1: set dtr failed
+ \retval -2: USB device unavailable
*/
int ftdi_setdtr(struct ftdi_context *ftdi, int state)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
if (state)
usb_val = SIO_SET_DTR_HIGH;
else
usb_val = SIO_SET_DTR_LOW;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
- NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "set dtr failed");
return 0;
\param state state to set line to (1 or 0)
\retval 0: all fine
- \retval -1 set rts failed
+ \retval -1: set rts failed
+ \retval -2: USB device unavailable
*/
int ftdi_setrts(struct ftdi_context *ftdi, int state)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
if (state)
usb_val = SIO_SET_RTS_HIGH;
else
usb_val = SIO_SET_RTS_LOW;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
- NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "set of rts failed");
return 0;
}
/**
- Set dtr and rts line in one pass
+ Set dtr and rts line in one pass
- \param ftdi pointer to ftdi_context
- \param dtr DTR state to set line to (1 or 0)
- \param rts RTS state to set line to (1 or 0)
+ \param ftdi pointer to ftdi_context
+ \param dtr DTR state to set line to (1 or 0)
+ \param rts RTS state to set line to (1 or 0)
- \retval 0: all fine
- \retval -1 set dtr/rts failed
+ \retval 0: all fine
+ \retval -1: set dtr/rts failed
+ \retval -2: USB device unavailable
*/
int ftdi_setdtr_rts(struct ftdi_context *ftdi, int dtr, int rts)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
if (dtr)
usb_val = SIO_SET_DTR_HIGH;
else
else
usb_val |= SIO_SET_RTS_LOW;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
- NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_SET_MODEM_CTRL_REQUEST, usb_val, ftdi->index,
+ NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "set of rts/dtr failed");
return 0;
\retval 0: all fine
\retval -1: unable to set event character
+ \retval -2: USB device unavailable
*/
int ftdi_set_event_char(struct ftdi_context *ftdi,
unsigned char eventch, unsigned char enable)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
usb_val = eventch;
if (enable)
usb_val |= 1 << 8;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_EVENT_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_EVENT_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "setting event character failed");
return 0;
\retval 0: all fine
\retval -1: unable to set error character
+ \retval -2: USB device unavailable
*/
int ftdi_set_error_char(struct ftdi_context *ftdi,
unsigned char errorch, unsigned char enable)
{
unsigned short usb_val;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
usb_val = errorch;
if (enable)
usb_val |= 1 << 8;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_ERROR_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_SET_ERROR_CHAR_REQUEST, usb_val, ftdi->index, NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "setting error character failed");
return 0;
}
/**
- Set the eeprom size
-
- \param ftdi pointer to ftdi_context
- \param eeprom Pointer to ftdi_eeprom
- \param size
-
-*/
-void ftdi_eeprom_setsize(struct ftdi_context *ftdi, struct ftdi_eeprom *eeprom, int size)
-{
- ftdi->eeprom_size=size;
- eeprom->size=size;
-}
-
-/**
Init eeprom with default values.
+ \param ftdi pointer to ftdi_context
+ \param manufacturer String to use as Manufacturer
+ \param product String to use as Product description
+ \param serial String to use as Serial number description
- \param eeprom Pointer to ftdi_eeprom
+ \retval 0: all fine
+ \retval -1: No struct ftdi_context
+ \retval -2: No struct ftdi_eeprom
*/
-void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom)
+int ftdi_eeprom_initdefaults(struct ftdi_context *ftdi, char * manufacturer,
+ char * product, char * serial)
{
- eeprom->vendor_id = 0x0403;
- eeprom->product_id = 0x6001;
+ struct ftdi_eeprom *eeprom;
- eeprom->self_powered = 1;
- eeprom->remote_wakeup = 1;
- eeprom->BM_type_chip = 1;
+ if (ftdi == NULL)
+ ftdi_error_return(-1, "No struct ftdi_context");
- eeprom->in_is_isochronous = 0;
- eeprom->out_is_isochronous = 0;
- eeprom->suspend_pull_downs = 0;
+ if (ftdi->eeprom == NULL)
+ ftdi_error_return(-2,"No struct ftdi_eeprom");
- eeprom->use_serial = 0;
- eeprom->change_usb_version = 0;
- eeprom->usb_version = 0x0200;
- eeprom->max_power = 0;
+ eeprom = ftdi->eeprom;
+ memset(eeprom, 0, sizeof(struct ftdi_eeprom));
+
+ eeprom->vendor_id = 0x0403;
+ 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;
+ if (ftdi->type == TYPE_AM)
+ eeprom->usb_version = 0x0101;
+ else
+ eeprom->usb_version = 0x0200;
+ eeprom->max_power = 100;
+ if (eeprom->manufacturer)
+ free (eeprom->manufacturer);
eeprom->manufacturer = NULL;
+ if (manufacturer)
+ {
+ eeprom->manufacturer = malloc(strlen(manufacturer)+1);
+ if (eeprom->manufacturer)
+ strcpy(eeprom->manufacturer, manufacturer);
+ }
+
+ if (eeprom->product)
+ free (eeprom->product);
eeprom->product = NULL;
+ {
+ eeprom->product = malloc(strlen(product)+1);
+ if (eeprom->product)
+ strcpy(eeprom->product, product);
+ }
+
+ if (eeprom->serial)
+ free (eeprom->serial);
eeprom->serial = NULL;
+ if (serial)
+ {
+ eeprom->serial = malloc(strlen(serial)+1);
+ if (eeprom->serial)
+ strcpy(eeprom->serial, serial);
+ }
+
- eeprom->size = FTDI_DEFAULT_EEPROM_SIZE;
+ if(ftdi->type == TYPE_R)
+ {
+ eeprom->max_power = 90;
+ eeprom->size = 0x80;
+ eeprom->cbus_function[0] = CBUS_TXLED;
+ eeprom->cbus_function[1] = CBUS_RXLED;
+ eeprom->cbus_function[2] = CBUS_TXDEN;
+ eeprom->cbus_function[3] = CBUS_PWREN;
+ eeprom->cbus_function[4] = CBUS_SLEEP;
+ }
+ else
+ eeprom->size = -1;
+ return 0;
}
/**
- Build binary output from ftdi_eeprom structure.
- Output is suitable for ftdi_write_eeprom().
+ Build binary buffer from ftdi_eeprom structure.
+ Output is suitable for ftdi_write_eeprom().
- \param eeprom Pointer to ftdi_eeprom
- \param output Buffer of 128 bytes to store eeprom image to
+ \param ftdi pointer to ftdi_context
- \retval >0: used eeprom size
- \retval -1: eeprom size (128 bytes) exceeded by custom strings
+ \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
+ \retval -6: No connected EEPROM or EEPROM Type unknown
*/
-int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output)
+int ftdi_eeprom_build(struct ftdi_context *ftdi)
{
- unsigned char i, j;
+ unsigned char i, j, eeprom_size_mask;
unsigned short checksum, value;
unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
int size_check;
+ struct ftdi_eeprom *eeprom;
+ unsigned char * output;
+
+ if (ftdi == NULL)
+ ftdi_error_return(-2,"No context");
+ if (ftdi->eeprom == NULL)
+ ftdi_error_return(-2,"No eeprom structure");
+
+ eeprom= ftdi->eeprom;
+ output = eeprom->buf;
+
+ if(eeprom->chip == -1)
+ ftdi_error_return(-5,"No connected EEPROM or EEPROM type unknown");
+
+ if ((eeprom->chip == 0x56) || (eeprom->chip == 0x66))
+ eeprom->size = 0x100;
+ else
+ eeprom->size = 0x80;
if (eeprom->manufacturer != NULL)
manufacturer_size = strlen(eeprom->manufacturer);
if (eeprom->serial != NULL)
serial_size = strlen(eeprom->serial);
- 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 -= -9;
+
// eeprom size exceeded?
if (size_check < 0)
return (-1);
// empty eeprom
- memset (output, 0, eeprom->size);
+ memset (ftdi->eeprom->buf, 0, FTDI_MAX_EEPROM_SIZE);
+
+ // Bytes and Bits set for all Types
- // Addr 00: Stay 00 00
// 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 (ftdi->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;
+ case TYPE_2232H:
+ output[0x07] = 0x07;
+ break;
+ case TYPE_4232H:
+ output[0x07] = 0x08;
+ break;
+ default:
+ output[0x07] = 0x00;
+ }
// Addr 08: Config descriptor
// Bit 7: always 1
// Bit 6: 1 if this device is self powered, 0 if bus powered
// Bit 5: 1 if this device uses remote wakeup
- // Bit 4: 1 if this device is battery powered
+ // Bit 4-0: reserved - 0
j = 0x80;
if (eeprom->self_powered == 1)
j |= 0x40;
output[0x08] = j;
// Addr 09: Max power consumption: max power = value * 2 mA
- output[0x09] = eeprom->max_power;
-
- // Addr 0A: Chip configuration
- // Bit 7: 0 - reserved
- // Bit 6: 0 - reserved
- // Bit 5: 0 - reserved
- // Bit 4: 1 - Change USB version
- // Bit 3: 1 - Use the serial number string
- // Bit 2: 1 - Enable suspend pull downs for lower power
- // Bit 1: 1 - Out EndPoint is Isochronous
- // Bit 0: 1 - In EndPoint is Isochronous
- //
- j = 0;
- if (eeprom->in_is_isochronous == 1)
- j = j | 1;
- if (eeprom->out_is_isochronous == 1)
- j = j | 2;
- if (eeprom->suspend_pull_downs == 1)
- j = j | 4;
- if (eeprom->use_serial == 1)
- j = j | 8;
- if (eeprom->change_usb_version == 1)
- j = j | 16;
- output[0x0A] = j;
+ output[0x09] = eeprom->max_power>>1;
- // Addr 0B: reserved
- output[0x0B] = 0x00;
-
- // 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 (eeprom->change_usb_version == 1)
+ if(ftdi->type != TYPE_AM)
{
- output[0x0C] = eeprom->usb_version;
- output[0x0D] = eeprom->usb_version >> 8;
+ // Addr 0A: Chip configuration
+ // Bit 7: 0 - reserved
+ // Bit 6: 0 - reserved
+ // Bit 5: 0 - reserved
+ // Bit 4: 1 - Change USB version
+ // Bit 3: 1 - Use the serial number string
+ // Bit 2: 1 - Enable suspend pull downs for lower power
+ // Bit 1: 1 - Out EndPoint is Isochronous
+ // Bit 0: 1 - In EndPoint is Isochronous
+ //
+ j = 0;
+ if (eeprom->in_is_isochronous == 1)
+ j = j | 1;
+ if (eeprom->out_is_isochronous == 1)
+ j = j | 2;
+ output[0x0A] = j;
}
+ // Dynamic content
+ // Strings start at 0x94 (TYPE_AM, TYPE_BM)
+ // 0x96 (TYPE_2232C), 0x98 (TYPE_R) and 0x9a (TYPE_x232H)
+ i = 0;
+ switch(ftdi->type)
+ {
+ case TYPE_2232H:
+ case TYPE_4232H:
+ i += 2;
+ case TYPE_R:
+ i += 2;
+ case TYPE_2232C:
+ i += 2;
+ case TYPE_AM:
+ case TYPE_BM:
+ i += 0x94;
+ }
+ /* Wrap around 0x80 for 128 byte EEPROMS (Internale and 93x46) */
+ eeprom_size_mask = eeprom->size -1;
// Addr 0E: Offset of the manufacturer string + 0x80, calculated later
// Addr 0F: Length of manufacturer string
+ // Output manufacturer
+ output[0x0E] = i; // calculate offset
+ output[i & eeprom_size_mask] = manufacturer_size*2 + 2, i++;
+ output[i & eeprom_size_mask] = 0x03, i++; // type: string
+ for (j = 0; j < manufacturer_size; j++)
+ {
+ output[i & eeprom_size_mask] = eeprom->manufacturer[j], i++;
+ output[i & eeprom_size_mask] = 0x00, i++;
+ }
output[0x0F] = manufacturer_size*2 + 2;
// Addr 10: Offset of the product string + 0x80, calculated later
// Addr 11: Length of product string
+ output[0x10] = i | 0x80; // calculate offset
+ output[i & eeprom_size_mask] = product_size*2 + 2, i++;
+ output[i & eeprom_size_mask] = 0x03, i++;
+ for (j = 0; j < product_size; j++)
+ {
+ output[i & eeprom_size_mask] = eeprom->product[j], i++;
+ output[i & eeprom_size_mask] = 0x00, i++;
+ }
output[0x11] = product_size*2 + 2;
// Addr 12: Offset of the serial string + 0x80, calculated later
// Addr 13: Length of serial string
- output[0x13] = serial_size*2 + 2;
-
- // Dynamic content
- i=0x14;
- if (eeprom->size>=256) i = 0x80;
-
-
- // Output manufacturer
- output[0x0E] = i | 0x80; // calculate offset
- output[i++] = manufacturer_size*2 + 2;
- output[i++] = 0x03; // type: string
- for (j = 0; j < manufacturer_size; j++)
+ output[0x12] = i | 0x80; // calculate offset
+ output[i & eeprom_size_mask] = serial_size*2 + 2, i++;
+ output[i & eeprom_size_mask] = 0x03, i++;
+ for (j = 0; j < serial_size; j++)
{
- output[i] = eeprom->manufacturer[j], i++;
- output[i] = 0x00, i++;
+ output[i & eeprom_size_mask] = eeprom->serial[j], i++;
+ output[i & eeprom_size_mask] = 0x00, i++;
}
+ output[i & eeprom_size_mask] = 0x02; /* as seen when written with FTD2XX */
+ i++;
+ output[i & eeprom_size_mask] = 0x03; /* as seen when written with FTD2XX */
+ i++;
+ output[i & eeprom_size_mask] = eeprom->is_not_pnp; /* as seen when written with FTD2XX */
+ i++;
- // Output product name
- output[0x10] = i | 0x80; // calculate offset
- output[i] = product_size*2 + 2, i++;
- output[i] = 0x03, i++;
- for (j = 0; j < product_size; j++)
+ output[0x13] = serial_size*2 + 2;
+
+ if(ftdi->type > TYPE_AM) /*use_serial not used in AM devices*/
{
- output[i] = eeprom->product[j], i++;
- output[i] = 0x00, i++;
+ if (eeprom->use_serial == USE_SERIAL_NUM )
+ output[0x0A] |= USE_SERIAL_NUM;
+ else
+ output[0x0A] &= ~USE_SERIAL_NUM;
}
+ /* Fixme: ftd2xx seems to append 0x02, 0x03 and 0x01 for PnP = 0 or 0x00 else */
+ // calculate checksum
- // Output serial
- output[0x12] = i | 0x80; // calculate offset
- output[i] = serial_size*2 + 2, i++;
- output[i] = 0x03, i++;
- for (j = 0; j < serial_size; j++)
+ /* Bytes and Bits specific to (some) types
+ Write linear, as this allows easier fixing*/
+ switch(ftdi->type)
{
- output[i] = eeprom->serial[j], i++;
- output[i] = 0x00, i++;
+ case TYPE_AM:
+ break;
+ case TYPE_BM:
+ output[0x0C] = eeprom->usb_version & 0xff;
+ output[0x0D] = (eeprom->usb_version>>8) & 0xff;
+ output[0x14] = eeprom->chip;
+ break;
+ case TYPE_2232C:
+
+ output[0x00] = (eeprom->channel_a_type);
+ if ( eeprom->channel_a_driver == DRIVER_VCP)
+ output[0x00] |= DRIVER_VCP;
+ else
+ output[0x00] &= ~DRIVER_VCP;
+
+ if ( eeprom->high_current_a == HIGH_CURRENT_DRIVE)
+ output[0x00] |= HIGH_CURRENT_DRIVE;
+ else
+ output[0x00] &= ~HIGH_CURRENT_DRIVE;
+
+ output[0x01] = (eeprom->channel_b_type);
+ if ( eeprom->channel_b_driver == DRIVER_VCP)
+ output[0x01] |= DRIVER_VCP;
+ else
+ output[0x01] &= ~DRIVER_VCP;
+
+ if ( eeprom->high_current_b == HIGH_CURRENT_DRIVE)
+ output[0x01] |= HIGH_CURRENT_DRIVE;
+ else
+ output[0x01] &= ~HIGH_CURRENT_DRIVE;
+
+ if (eeprom->in_is_isochronous == 1)
+ output[0x0A] |= 0x1;
+ else
+ output[0x0A] &= ~0x1;
+ if (eeprom->out_is_isochronous == 1)
+ output[0x0A] |= 0x2;
+ else
+ output[0x0A] &= ~0x2;
+ if (eeprom->suspend_pull_downs == 1)
+ output[0x0A] |= 0x4;
+ else
+ output[0x0A] &= ~0x4;
+ output[0x0C] = eeprom->usb_version & 0xff;
+ output[0x0D] = (eeprom->usb_version>>8) & 0xff;
+ output[0x14] = eeprom->chip;
+ break;
+ case TYPE_R:
+ if(eeprom->high_current == HIGH_CURRENT_DRIVE_R)
+ output[0x00] |= HIGH_CURRENT_DRIVE_R;
+ output[0x01] = 0x40; /* Hard coded Endpoint Size*/
+
+ if (eeprom->suspend_pull_downs == 1)
+ output[0x0A] |= 0x4;
+ else
+ output[0x0A] &= ~0x4;
+ output[0x0B] = eeprom->invert;
+ output[0x0C] = eeprom->usb_version & 0xff;
+ output[0x0D] = (eeprom->usb_version>>8) & 0xff;
+
+ if(eeprom->cbus_function[0] > CBUS_BB)
+ output[0x14] = CBUS_TXLED;
+ else
+ output[0x14] = eeprom->cbus_function[0];
+
+ if(eeprom->cbus_function[1] > CBUS_BB)
+ output[0x14] |= CBUS_RXLED<<4;
+ else
+ output[0x14] |= eeprom->cbus_function[1]<<4;
+
+ if(eeprom->cbus_function[2] > CBUS_BB)
+ output[0x15] = CBUS_TXDEN;
+ else
+ output[0x15] = eeprom->cbus_function[2];
+
+ if(eeprom->cbus_function[3] > CBUS_BB)
+ output[0x15] |= CBUS_PWREN<<4;
+ else
+ output[0x15] |= eeprom->cbus_function[3]<<4;
+
+ if(eeprom->cbus_function[4] > CBUS_CLK6)
+ output[0x16] = CBUS_SLEEP;
+ else
+ output[0x16] = eeprom->cbus_function[4];
+ break;
+ case TYPE_2232H:
+ output[0x00] = (eeprom->channel_a_type);
+ if ( eeprom->channel_a_driver == DRIVER_VCP)
+ output[0x00] |= DRIVER_VCP;
+ else
+ output[0x00] &= ~DRIVER_VCP;
+
+ output[0x01] = (eeprom->channel_b_type);
+ if ( eeprom->channel_b_driver == DRIVER_VCP)
+ output[0x01] |= DRIVER_VCP;
+ else
+ output[0x01] &= ~DRIVER_VCP;
+ if(eeprom->suspend_dbus7 == SUSPEND_DBUS7)
+ output[0x01] |= SUSPEND_DBUS7;
+ else
+ output[0x01] &= ~SUSPEND_DBUS7;
+
+ if (eeprom->suspend_pull_downs == 1)
+ output[0x0A] |= 0x4;
+ else
+ output[0x0A] &= ~0x4;
+
+ if(eeprom->group0_drive > DRIVE_16MA)
+ output[0x0c] |= DRIVE_16MA;
+ else
+ output[0x0c] |= eeprom->group0_drive;
+ if (eeprom->group0_schmitt == IS_SCHMITT)
+ output[0x0c] |= IS_SCHMITT;
+ if (eeprom->group0_slew == SLOW_SLEW)
+ output[0x0c] |= SLOW_SLEW;
+
+ if(eeprom->group1_drive > DRIVE_16MA)
+ output[0x0c] |= DRIVE_16MA<<4;
+ else
+ output[0x0c] |= eeprom->group1_drive<<4;
+ if (eeprom->group1_schmitt == IS_SCHMITT)
+ output[0x0c] |= IS_SCHMITT<<4;
+ if (eeprom->group1_slew == SLOW_SLEW)
+ output[0x0c] |= SLOW_SLEW<<4;
+
+ if(eeprom->group2_drive > DRIVE_16MA)
+ output[0x0d] |= DRIVE_16MA;
+ else
+ output[0x0d] |= eeprom->group2_drive;
+ if (eeprom->group2_schmitt == IS_SCHMITT)
+ output[0x0d] |= IS_SCHMITT;
+ if (eeprom->group2_slew == SLOW_SLEW)
+ output[0x0d] |= SLOW_SLEW;
+
+ if(eeprom->group3_drive > DRIVE_16MA)
+ output[0x0d] |= DRIVE_16MA<<4;
+ else
+ output[0x0d] |= eeprom->group3_drive<<4;
+ if (eeprom->group3_schmitt == IS_SCHMITT)
+ output[0x0d] |= IS_SCHMITT<<4;
+ if (eeprom->group3_slew == SLOW_SLEW)
+ output[0x0d] |= SLOW_SLEW<<4;
+
+ output[0x18] = eeprom->chip;
+
+ break;
+ case TYPE_4232H:
+ fprintf(stderr,"FIXME: Build FT4232H specific EEPROM settings\n");
}
// calculate checksum
/**
Decode binary EEPROM image into an ftdi_eeprom structure.
- \param eeprom Pointer to ftdi_eeprom which will be filled in.
- \param buf Buffer of \a size bytes of raw eeprom data
- \param size size size of eeprom data in bytes
-
+ \param ftdi pointer to ftdi_context
+ \param verbose Decode EEPROM on stdout
+
\retval 0: all fine
\retval -1: something went wrong
FIXME: How to pass size? How to handle size field in ftdi_eeprom?
FIXME: Strings are malloc'ed here and should be freed somewhere
*/
-int ftdi_eeprom_decode(struct ftdi_eeprom *eeprom, unsigned char *buf, int size)
+int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
{
unsigned char i, j;
unsigned short checksum, eeprom_checksum, value;
unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
- int size_check;
- int eeprom_size = 128;
-#if 0
- size_check = eeprom->size;
- size_check -= 28; // 28 are always in use (fixed)
-
- // 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;
+ int eeprom_size;
+ struct ftdi_eeprom *eeprom;
+ unsigned char *buf = ftdi->eeprom->buf;
+ int release;
- // eeprom size exceeded?
- if (size_check < 0)
- return (-1);
-#endif
-
- // empty eeprom struct
- memset(eeprom, 0, sizeof(struct ftdi_eeprom));
-
- // Addr 00: Stay 00 00
+ if (ftdi == NULL)
+ ftdi_error_return(-1,"No context");
+ if (ftdi->eeprom == NULL)
+ ftdi_error_return(-1,"No eeprom structure");
+
+ eeprom = ftdi->eeprom;
+ eeprom_size = eeprom->size;
// Addr 02: Vendor ID
eeprom->vendor_id = buf[0x02] + (buf[0x03] << 8);
// Addr 04: Product ID
eeprom->product_id = buf[0x04] + (buf[0x05] << 8);
- value = buf[0x06] + (buf[0x07]<<8);
- switch (value)
- {
- case 0x0400:
- eeprom->BM_type_chip = 1;
- break;
- case 0x0200:
- eeprom->BM_type_chip = 0;
- break;
- default: // Unknown device
- eeprom->BM_type_chip = 0;
- break;
- }
+ release = buf[0x06] + (buf[0x07]<<8);
// Addr 08: Config descriptor
// Bit 7: always 1
// Bit 6: 1 if this device is self powered, 0 if bus powered
// Bit 5: 1 if this device uses remote wakeup
- // Bit 4: 1 if this device is battery powered
- j = buf[0x08];
- if (j&0x40) eeprom->self_powered = 1;
- if (j&0x20) eeprom->remote_wakeup = 1;
+ eeprom->self_powered = buf[0x08] & 0x40;
+ eeprom->remote_wakeup = buf[0x08] & 0x20;;
// Addr 09: Max power consumption: max power = value * 2 mA
eeprom->max_power = buf[0x09];
// Bit 6: 0 - reserved
// Bit 5: 0 - reserved
// Bit 4: 1 - Change USB version
+ // Not seen on FT2232(D)
// Bit 3: 1 - Use the serial number string
// Bit 2: 1 - Enable suspend pull downs for lower power
// Bit 1: 1 - Out EndPoint is Isochronous
// Bit 0: 1 - In EndPoint is Isochronous
//
- j = buf[0x0A];
- if (j&0x01) eeprom->in_is_isochronous = 1;
- if (j&0x02) eeprom->out_is_isochronous = 1;
- if (j&0x04) eeprom->suspend_pull_downs = 1;
- if (j&0x08) eeprom->use_serial = 1;
- if (j&0x10) eeprom->change_usb_version = 1;
+ 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] & USE_SERIAL_NUM;
+ if(buf[0x0A]&0x10)
+ fprintf(stderr,
+ "EEPROM byte[0x0a] Bit 4 unexpected set. If this happened with the EEPROM\n"
+ "programmed by FTDI tools, please report to libftdi@developer.intra2net.com\n");
- // Addr 0B: reserved
- // 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 (eeprom->change_usb_version == 1)
- {
- eeprom->usb_version = buf[0x0C] + (buf[0x0D] << 8);
- }
+ // Addr 0C: USB version low byte when 0x0A
+ // Addr 0D: USB version high byte when 0x0A
+ eeprom->usb_version = buf[0x0C] + (buf[0x0D] << 8);
// Addr 0E: Offset of the manufacturer string + 0x80, calculated later
// Addr 0F: Length of manufacturer string
manufacturer_size = buf[0x0F]/2;
- if (manufacturer_size > 0) eeprom->manufacturer = malloc(manufacturer_size);
+ if(eeprom->manufacturer)
+ free(eeprom->manufacturer);
+ if (manufacturer_size > 0)
+ {
+ eeprom->manufacturer = malloc(manufacturer_size);
+ if (eeprom->manufacturer)
+ {
+ // Decode manufacturer
+ i = buf[0x0E] & (eeprom_size -1); // offset
+ for (j=0;j<manufacturer_size-1;j++)
+ {
+ eeprom->manufacturer[j] = buf[2*j+i+2];
+ }
+ eeprom->manufacturer[j] = '\0';
+ }
+ }
else eeprom->manufacturer = NULL;
// Addr 10: Offset of the product string + 0x80, calculated later
// Addr 11: Length of product string
+ if(eeprom->product)
+ free(eeprom->product);
product_size = buf[0x11]/2;
- if (product_size > 0) eeprom->product = malloc(product_size);
+ if (product_size > 0)
+ {
+ eeprom->product = malloc(product_size);
+ if(eeprom->product)
+ {
+ // Decode product name
+ i = buf[0x10] & (eeprom_size -1); // offset
+ for (j=0;j<product_size-1;j++)
+ {
+ eeprom->product[j] = buf[2*j+i+2];
+ }
+ eeprom->product[j] = '\0';
+ }
+ }
else eeprom->product = NULL;
// Addr 12: Offset of the serial string + 0x80, calculated later
// Addr 13: Length of serial string
+ if(eeprom->serial)
+ free(eeprom->serial);
serial_size = buf[0x13]/2;
- if (serial_size > 0) eeprom->serial = malloc(serial_size);
- else eeprom->serial = NULL;
-
- // Decode manufacturer
- i = buf[0x0E] & 0x7f; // offset
- for (j=0;j<manufacturer_size-1;j++)
+ if (serial_size > 0)
{
- eeprom->manufacturer[j] = buf[2*j+i+2];
- }
- eeprom->manufacturer[j] = '\0';
-
- // Decode product name
- i = buf[0x10] & 0x7f; // offset
- for (j=0;j<product_size-1;j++)
- {
- eeprom->product[j] = buf[2*j+i+2];
- }
- eeprom->product[j] = '\0';
-
- // Decode serial
- i = buf[0x12] & 0x7f; // offset
- for (j=0;j<serial_size-1;j++)
- {
- eeprom->serial[j] = buf[2*j+i+2];
+ eeprom->serial = malloc(serial_size);
+ if(eeprom->serial)
+ {
+ // Decode serial
+ i = buf[0x12] & (eeprom_size -1); // offset
+ for (j=0;j<serial_size-1;j++)
+ {
+ eeprom->serial[j] = buf[2*j+i+2];
+ }
+ eeprom->serial[j] = '\0';
+ }
}
- eeprom->serial[j] = '\0';
+ else eeprom->serial = NULL;
// verify checksum
checksum = 0xAAAA;
if (eeprom_checksum != checksum)
{
fprintf(stderr, "Checksum Error: %04x %04x\n", checksum, eeprom_checksum);
- return -1;
+ ftdi_error_return(-1,"EEPROM checksum error");
+ }
+
+ eeprom->channel_a_type = 0;
+ if ((ftdi->type == TYPE_AM) || (ftdi->type == TYPE_BM))
+ {
+ eeprom->chip = -1;
+ }
+ else if(ftdi->type == TYPE_2232C)
+ {
+ eeprom->channel_a_type = buf[0x00] & 0x7;
+ eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
+ eeprom->high_current_a = buf[0x00] & HIGH_CURRENT_DRIVE;
+ eeprom->channel_b_type = buf[0x01] & 0x7;
+ eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
+ eeprom->high_current_b = buf[0x01] & HIGH_CURRENT_DRIVE;
+ eeprom->chip = buf[0x14];
+ }
+ else if(ftdi->type == TYPE_R)
+ {
+ /* TYPE_R flags D2XX, not VCP as all others*/
+ eeprom->channel_a_driver = (~buf[0x00]) & DRIVER_VCP;
+ eeprom->high_current = buf[0x00] & HIGH_CURRENT_DRIVE_R;
+ if( (buf[0x01]&0x40) != 0x40)
+ fprintf(stderr,
+ "TYPE_R EEPROM byte[0x01] Bit 6 unexpected Endpoint size."
+ " If this happened with the\n"
+ " EEPROM programmed by FTDI tools, please report "
+ "to libftdi@developer.intra2net.com\n");
+
+ eeprom->chip = buf[0x16];
+ // Addr 0B: Invert data lines
+ // Works only on FT232R, not FT245R, but no way to distinguish
+ eeprom->invert = buf[0x0B];
+ // Addr 14: CBUS function: CBUS0, CBUS1
+ // Addr 15: CBUS function: CBUS2, CBUS3
+ // Addr 16: CBUS function: CBUS5
+ 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 if ((ftdi->type == TYPE_2232H) ||(ftdi->type == TYPE_4232H))
+ {
+ eeprom->channel_a_type = buf[0x00] & 0x7;
+ eeprom->channel_a_driver = buf[0x00] & DRIVER_VCP;
+ eeprom->channel_b_type = buf[0x01] & 0x7;
+ eeprom->channel_b_driver = buf[0x01] & DRIVER_VCP;
+
+ if(ftdi->type == TYPE_2232H)
+ eeprom->suspend_dbus7 = buf[0x01] & SUSPEND_DBUS7;
+
+ 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;
+ eeprom->group1_drive = (buf[0x0c] >> 4) & 0x3;
+ eeprom->group1_schmitt = (buf[0x0c] >> 4) & IS_SCHMITT;
+ eeprom->group1_slew = (buf[0x0c] >> 4) & SLOW_SLEW;
+ eeprom->group2_drive = buf[0x0d] & DRIVE_16MA;
+ eeprom->group2_schmitt = buf[0x0d] & IS_SCHMITT;
+ eeprom->group2_slew = buf[0x0d] & SLOW_SLEW;
+ eeprom->group3_drive = (buf[0x0d] >> 4) & DRIVE_16MA;
+ eeprom->group3_schmitt = (buf[0x0d] >> 4) & IS_SCHMITT;
+ eeprom->group3_slew = (buf[0x0d] >> 4) & SLOW_SLEW;
}
+
+ if(verbose)
+ {
+ char *channel_mode[] = {"UART","245","CPU", "unknown", "OPTO"};
+ fprintf(stdout, "VID: 0x%04x\n",eeprom->vendor_id);
+ fprintf(stdout, "PID: 0x%04x\n",eeprom->product_id);
+ fprintf(stdout, "Release: 0x%04x\n",release);
+ 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,
+ (eeprom->remote_wakeup)?" USB Remote Wake Up\n":"\n");
+ if(eeprom->manufacturer)
+ fprintf(stdout, "Manufacturer: %s\n",eeprom->manufacturer);
+ if(eeprom->product)
+ fprintf(stdout, "Product: %s\n",eeprom->product);
+ 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)
+ fprintf(stdout, "Pull IO pins low during suspend\n");
+ if(eeprom->remote_wakeup)
+ fprintf(stdout, "Enable Remote Wake Up\n");
+ fprintf(stdout, "PNP: %d\n",(eeprom->is_not_pnp)?0:1);
+ if (ftdi->type >= TYPE_2232C)
+ fprintf(stdout,"Channel A has Mode %s%s%s\n",
+ channel_mode[eeprom->channel_a_type],
+ (eeprom->channel_a_driver)?" VCP":"",
+ (eeprom->high_current_a)?" High Current IO":"");
+ if ((ftdi->type >= TYPE_2232C) && (ftdi->type != TYPE_R))
+ fprintf(stdout,"Channel B has Mode %s%s%s\n",
+ channel_mode[eeprom->channel_b_type],
+ (eeprom->channel_b_driver)?" VCP":"",
+ (eeprom->high_current_b)?" High Current IO":"");
+ if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
+ {
+ fprintf(stdout,"%s has %d mA drive%s%s\n",
+ (ftdi->type == TYPE_2232H)?"AL":"A",
+ (eeprom->group0_drive+1) *4,
+ (eeprom->group0_schmitt)?" Schmitt Input":"",
+ (eeprom->group0_slew)?" Slow Slew":"");
+ fprintf(stdout,"%s has %d mA drive%s%s\n",
+ (ftdi->type == TYPE_2232H)?"AH":"B",
+ (eeprom->group1_drive+1) *4,
+ (eeprom->group1_schmitt)?" Schmitt Input":"",
+ (eeprom->group1_slew)?" Slow Slew":"");
+ fprintf(stdout,"%s has %d mA drive%s%s\n",
+ (ftdi->type == TYPE_2232H)?"BL":"C",
+ (eeprom->group2_drive+1) *4,
+ (eeprom->group2_schmitt)?" Schmitt Input":"",
+ (eeprom->group2_slew)?" Slow Slew":"");
+ fprintf(stdout,"%s has %d mA drive%s%s\n",
+ (ftdi->type == TYPE_2232H)?"BH":"D",
+ (eeprom->group3_drive+1) *4,
+ (eeprom->group3_schmitt)?" Schmitt Input":"",
+ (eeprom->group3_slew)?" Slow Slew":"");
+ }
+ if (ftdi->type == TYPE_R)
+ {
+ char *cbus_mux[] = {"TXDEN","PWREN","RXLED", "TXLED","TX+RXLED",
+ "SLEEP","CLK48","CLK24","CLK12","CLK6",
+ "IOMODE","BB_WR","BB_RD"};
+ char *cbus_BB[] = {"RXF","TXE","RD", "WR"};
+ int i;
+
+ if(eeprom->invert)
+ {
+ char *r_bits[] = {"TXD","RXD","RTS", "CTS","DTR","DSR","DCD","RI"};
+ fprintf(stdout,"Inverted bits:");
+ for (i=0; i<8; i++)
+ if((eeprom->invert & (1<<i)) == (1<<i))
+ fprintf(stdout," %s",r_bits[i]);
+ fprintf(stdout,"\n");
+ }
+ for(i=0; i<5; i++)
+ {
+ if(eeprom->cbus_function[i]<CBUS_BB)
+ fprintf(stdout,"C%d Function: %s\n", i,
+ cbus_mux[eeprom->cbus_function[i]]);
+ else
+ fprintf(stdout,"C%d BB Function: %s\n", i,
+ cbus_BB[i]);
+ }
+ }
+ }
return 0;
}
\retval 0: all fine
\retval -1: read failed
+ \retval -2: USB device unavailable
*/
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)
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, eeprom_addr, (unsigned 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
- \param eeprom Pointer to store eeprom into
\retval 0: all fine
\retval -1: read failed
+ \retval -2: USB device unavailable
*/
-int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom)
+int ftdi_read_eeprom(struct ftdi_context *ftdi)
{
int i;
+ unsigned char *buf;
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+ buf = ftdi->eeprom->buf;
- for (i = 0; i < ftdi->eeprom_size/2; i++)
+ for (i = 0; i < FTDI_MAX_EEPROM_SIZE/2; i++)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, i, eeprom+(i*2), 2, ftdi->usb_read_timeout) != 2)
+ if (libusb_control_transfer(
+ ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE,SIO_READ_EEPROM_REQUEST, 0, i,
+ buf+(i*2), 2, ftdi->usb_read_timeout) != 2)
ftdi_error_return(-1, "reading eeprom failed");
}
+ if (ftdi->type == TYPE_R)
+ ftdi->eeprom->size = 0x80;
+ /* Guesses size of eeprom by comparing halves
+ - will not work with blank eeprom */
+ else if (strrchr((const char *)buf, 0xff) == ((const char *)buf +FTDI_MAX_EEPROM_SIZE -1))
+ ftdi->eeprom->size = -1;
+ else if(memcmp(buf,&buf[0x80],0x80) == 0)
+ ftdi->eeprom->size = 0x80;
+ else if(memcmp(buf,&buf[0x40],0x40) == 0)
+ ftdi->eeprom->size = 0x40;
+ else
+ ftdi->eeprom->size = 0x100;
return 0;
}
\retval 0: all fine
\retval -1: read failed
+ \retval -2: USB device unavailable
*/
int ftdi_read_chipid(struct ftdi_context *ftdi, unsigned int *chipid)
{
unsigned int a = 0, b = 0;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x43, (char *)&a, 2, ftdi->usb_read_timeout) == 2)
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x43, (unsigned char *)&a, 2, ftdi->usb_read_timeout) == 2)
{
a = a << 8 | a >> 8;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x44, (char *)&b, 2, ftdi->usb_read_timeout) == 2)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE, SIO_READ_EEPROM_REQUEST, 0, 0x44, (unsigned char *)&b, 2, ftdi->usb_read_timeout) == 2)
{
b = b << 8 | b >> 8;
a = (a << 16) | (b & 0xFFFF);
}
/**
- Guesses size of eeprom by reading eeprom and comparing halves - will not work with blank eeprom
- Call this function then do a write then call again to see if size changes, if so write again.
-
- \param ftdi pointer to ftdi_context
- \param eeprom Pointer to store eeprom into
- \param maxsize the size of the buffer to read into
-
- \retval size of eeprom
-*/
-int ftdi_read_eeprom_getsize(struct ftdi_context *ftdi, unsigned char *eeprom, int maxsize)
-{
- int i=0,j,minsize=32;
- int size=minsize;
-
- do
- {
- for (j = 0; i < maxsize/2 && j<size; j++)
- {
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_IN_REQTYPE,
- SIO_READ_EEPROM_REQUEST, 0, i,
- eeprom+(i*2), 2, ftdi->usb_read_timeout) != 2)
- ftdi_error_return(-1, "reading eeprom failed");
- i++;
- }
- size*=2;
- }
- while (size<=maxsize && memcmp(eeprom,&eeprom[size/2],size/2)!=0);
-
- return size/2;
-}
-
-/**
Write eeprom location
\param ftdi pointer to ftdi_context
\param eeprom_val Value to be written
\retval 0: all fine
- \retval -1: read failed
+ \retval -1: write failed
+ \retval -2: USB device unavailable
+ \retval -3: Invalid access to checksum protected area below 0x80
+ \retval -4: Device can't access unprotected area
+ \retval -5: Reading chip type failed
*/
-int ftdi_write_eeprom_location(struct ftdi_context *ftdi, int eeprom_addr, unsigned short eeprom_val)
+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,
+ int chip_type_location;
+ unsigned short chip_type;
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ if(eeprom_addr <0x80)
+ ftdi_error_return(-2, "Invalid access to checksum protected area below 0x80");
+
+
+ switch (ftdi->type)
+ {
+ case TYPE_BM:
+ case TYPE_2232C:
+ chip_type_location = 0x14;
+ break;
+ case TYPE_2232H:
+ case TYPE_4232H:
+ chip_type_location = 0x18;
+ break;
+ default:
+ ftdi_error_return(-4, "Device can't access unprotected area");
+ }
+
+ if (ftdi_read_eeprom_location( ftdi, chip_type_location>>1, &chip_type))
+ ftdi_error_return(-5, "Reading failed failed");
+ fprintf(stderr," loc 0x%04x val 0x%04x\n", chip_type_location,chip_type);
+ if((chip_type & 0xff) != 0x66)
+ {
+ ftdi_error_return(-6, "EEPROM is not of 93x66");
+ }
+
+ if (libusb_control_transfer(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");
Write eeprom
\param ftdi pointer to ftdi_context
- \param eeprom Pointer to read eeprom from
-
+
\retval 0: all fine
\retval -1: read failed
+ \retval -2: USB device unavailable
*/
-int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom)
+int ftdi_write_eeprom(struct ftdi_context *ftdi)
{
unsigned short usb_val, status;
int i, ret;
+ unsigned char *eeprom;
+
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+ eeprom = ftdi->eeprom->buf;
/* These commands were traced while running MProg */
if ((ret = ftdi_usb_reset(ftdi)) != 0)
if ((ret = ftdi_set_latency_timer(ftdi, 0x77)) != 0)
return ret;
- for (i = 0; i < ftdi->eeprom_size/2; i++)
+ for (i = 0; i < ftdi->eeprom->size/2; i++)
{
usb_val = eeprom[i*2];
usb_val += eeprom[(i*2)+1] << 8;
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
- SIO_WRITE_EEPROM_REQUEST, usb_val, i,
- NULL, 0, ftdi->usb_write_timeout) != 0)
+ if (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_WRITE_EEPROM_REQUEST, usb_val, i,
+ NULL, 0, ftdi->usb_write_timeout) < 0)
ftdi_error_return(-1, "unable to write eeprom");
}
\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)
{
- if (usb_control_msg(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE, SIO_ERASE_EEPROM_REQUEST, 0, 0, NULL, 0, ftdi->usb_write_timeout) != 0)
+ unsigned short eeprom_value;
+ if (ftdi == NULL || ftdi->usb_dev == NULL)
+ ftdi_error_return(-2, "USB device unavailable");
+
+ 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 (libusb_control_transfer(ftdi->usb_dev, FTDI_DEVICE_OUT_REQTYPE,
+ SIO_WRITE_EEPROM_REQUEST, MAGIC, 0xc0,
+ NULL, 0, ftdi->usb_write_timeout) != 0)
+ 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;
}
*/
char *ftdi_get_error_string (struct ftdi_context *ftdi)
{
+ if (ftdi == NULL)
+ return "";
+
return ftdi->error_str;
}
git://developer.intra2net.com / libftdi / blobdiff