***************************************************************************/
#include <usb.h>
+#include <string.h>
#include "ftdi.h"
0: all fine
-1: couldn't allocate read buffer
*/
-int ftdi_init(struct ftdi_context *ftdi) {
+int ftdi_init(struct ftdi_context *ftdi)
+{
ftdi->usb_dev = NULL;
ftdi->usb_read_timeout = 5000;
ftdi->usb_write_timeout = 5000;
ftdi->error_str = NULL;
- // all fine. Now allocate the readbuffer
- return ftdi_read_data_set_chunksize(ftdi, 4096);
+ /* All fine. Now allocate the readbuffer
+ Note: A readbuffer size above 64 bytes results in buggy input.
+ This seems to be a hardware limitation as noted
+ in the ftdi_sio driver */
+ return ftdi_read_data_set_chunksize(ftdi, 64);
}
-void ftdi_deinit(struct ftdi_context *ftdi) {
+void ftdi_deinit(struct ftdi_context *ftdi)
+{
if (ftdi->readbuffer != NULL) {
free(ftdi->readbuffer);
ftdi->readbuffer = NULL;
}
-void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb) {
+void ftdi_set_usbdev (struct ftdi_context *ftdi, usb_dev_handle *usb)
+{
ftdi->usb_dev = usb;
}
-5: unable to claim device
-6: reset failed
-7: set baudrate failed
+ -8: get product description failed
+ -9: get serial number failed
+ -10: unable to close device
*/
-int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product) {
+int ftdi_usb_open(struct ftdi_context *ftdi, int vendor, int product)
+{
+ return ftdi_usb_open_desc(ftdi, vendor, product, NULL, NULL);
+}
+
+int ftdi_usb_open_desc(struct ftdi_context *ftdi, int vendor, int product,
+ const char* description, const char* serial)
+{
struct usb_bus *bus;
struct usb_device *dev;
for (bus = usb_busses; bus; bus = bus->next) {
for (dev = bus->devices; dev; dev = dev->next) {
- if (dev->descriptor.idVendor == vendor && dev->descriptor.idProduct == product) {
- ftdi->usb_dev = usb_open(dev);
- if (ftdi->usb_dev) {
- if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0) {
- ftdi->error_str = "unable to claim usb device. Make sure ftdi_sio is unloaded!";
- return -5;
+ if (dev->descriptor.idVendor == vendor
+ && dev->descriptor.idProduct == product) {
+ if (!(ftdi->usb_dev = usb_open(dev))) {
+ ftdi->error_str = "usb_open() failed";
+ return -4;
+ }
+
+ char string[256];
+ if (description != NULL) {
+ if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iProduct, string, sizeof(string)) <= 0) {
+ ftdi->error_str = "unable to fetch product description\n";
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ return -8;
}
+ if (strncmp(string, description, sizeof(string)) != 0) {
+ ftdi->error_str = "product description not matching\n";
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ continue;
+ }
+ }
+ if (serial != NULL) {
+ if (usb_get_string_simple(ftdi->usb_dev, dev->descriptor.iSerialNumber, string, sizeof(string)) <= 0) {
+ ftdi->error_str = "unable to fetch serial number\n";
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ return -9;
+ }
+ if (strncmp(string, serial, sizeof(string)) != 0) {
+ ftdi->error_str = "serial number not matching\n";
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ continue;
+ }
+ }
- if (ftdi_usb_reset (ftdi) != 0)
- return -6;
-
- if (ftdi_set_baudrate (ftdi, 9600) != 0)
- return -7;
+ if (usb_claim_interface(ftdi->usb_dev, ftdi->interface) != 0) {
+ ftdi->error_str = "unable to claim usb device. Make sure ftdi_sio is unloaded!";
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ return -5;
+ }
- return 0;
- } else {
- ftdi->error_str = "usb_open() failed";
- return -4;
+ if (ftdi_usb_reset (ftdi) != 0) {
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ return -6;
}
+
+ if (ftdi_set_baudrate (ftdi, 9600) != 0) {
+ if (usb_close (ftdi->usb_dev) != 0)
+ return -10;
+ return -7;
+ }
+
+ // 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))
+ ftdi->type = TYPE_BM;
+ else if (dev->descriptor.bcdDevice == 0x200)
+ ftdi->type = TYPE_AM;
+ else if (dev->descriptor.bcdDevice == 0x500)
+ ftdi->type = TYPE_2232C;
+
+ return 0;
}
}
-
}
// device not found
}
-int ftdi_usb_reset(struct ftdi_context *ftdi) {
+int ftdi_usb_reset(struct ftdi_context *ftdi)
+{
if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
ftdi->error_str = "FTDI reset failed";
return -1;
return 0;
}
-int ftdi_usb_purge_buffers(struct ftdi_context *ftdi) {
+int ftdi_usb_purge_buffers(struct ftdi_context *ftdi)
+{
if (usb_control_msg(ftdi->usb_dev, 0x40, 0, 1, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
ftdi->error_str = "FTDI purge of RX buffer failed";
return -1;
-1: usb_release failed
-2: usb_close failed
*/
-int ftdi_usb_close(struct ftdi_context *ftdi) {
+int ftdi_usb_close(struct ftdi_context *ftdi)
+{
int rtn = 0;
if (usb_release_interface(ftdi->usb_dev, ftdi->interface) != 0)
Function is only used internally
*/
static int ftdi_convert_baudrate(int baudrate, struct ftdi_context *ftdi,
- unsigned short *value, unsigned short *index) {
+ unsigned short *value, unsigned short *index)
+{
static const char am_adjust_up[8] = {0, 0, 0, 1, 0, 3, 2, 1};
static const char am_adjust_dn[8] = {0, 0, 0, 1, 0, 1, 2, 3};
static const char frac_code[8] = {0, 3, 2, 4, 1, 5, 6, 7};
}
// Split into "value" and "index" values
*value = (unsigned short)(encoded_divisor & 0xFFFF);
- if(ftdi->type == TYPE_FT2232C) {
+ if(ftdi->type == TYPE_2232C) {
*index = (unsigned short)(encoded_divisor >> 8);
*index &= 0xFF00;
*index |= ftdi->interface;
-1: invalid baudrate
-2: setting baudrate failed
*/
-int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate) {
+int ftdi_set_baudrate(struct ftdi_context *ftdi, int baudrate)
+{
unsigned short value, index;
int actual_baudrate;
baudrate = baudrate*4;
}
- actual_baudrate = convert_baudrate(baudrate, ftdi, &value, &index);
+ actual_baudrate = ftdi_convert_baudrate(baudrate, ftdi, &value, &index);
if (actual_baudrate <= 0) {
ftdi->error_str = "Silly baudrate <= 0.";
return -1;
}
-int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size) {
+int ftdi_write_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
+{
int ret;
int offset = 0;
int total_written = 0;
write_size = size-offset;
ret = usb_bulk_write(ftdi->usb_dev, ftdi->in_ep, buf+offset, write_size, ftdi->usb_write_timeout);
- if (ret == -1) {
- ftdi->error_str = "bulk write failed";
- return -1;
+ if (ret < 0) {
+ if (ret == -1)
+ ftdi->error_str = "bulk write failed";
+ else
+ ftdi->error_str = "usb failed";
+ return ret;
}
total_written += ret;
}
-int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) {
+int ftdi_write_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
+{
ftdi->writebuffer_chunksize = chunksize;
return 0;
}
-int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) {
+int ftdi_write_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
+{
*chunksize = ftdi->writebuffer_chunksize;
return 0;
}
-int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size) {
+int ftdi_read_data(struct ftdi_context *ftdi, unsigned char *buf, int size)
+{
int offset = 0, ret = 1;
// everything we want is still in the readbuffer?
/* returns how much received */
ret = usb_bulk_read (ftdi->usb_dev, ftdi->out_ep, ftdi->readbuffer, ftdi->readbuffer_chunksize, ftdi->usb_read_timeout);
- if (ret == -1) {
- ftdi->error_str = "bulk read failed";
- return -1;
+ if (ret < 0) {
+ if (ret == -1)
+ ftdi->error_str = "bulk read failed";
+ else
+ ftdi->error_str = "usb failed";
+ return ret;
}
if (ret > 2) {
}
}
// never reached
- return -2;
+ return -127;
}
-int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize) {
+int ftdi_read_data_set_chunksize(struct ftdi_context *ftdi, unsigned int chunksize)
+{
+ unsigned char *new_buf;
+
// Invalidate all remaining data
ftdi->readbuffer_offset = 0;
ftdi->readbuffer_remaining = 0;
- unsigned char *new_buf;
if ((new_buf = (unsigned char *)realloc(ftdi->readbuffer, chunksize)) == NULL) {
ftdi->error_str = "out of memory for readbuffer";
return -1;
}
-int ftdi_readt_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize) {
+int ftdi_read_data_get_chunksize(struct ftdi_context *ftdi, unsigned int *chunksize)
+{
*chunksize = ftdi->readbuffer_chunksize;
return 0;
}
-int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask) {
+int ftdi_enable_bitbang(struct ftdi_context *ftdi, unsigned char bitmask)
+{
unsigned short usb_val;
usb_val = bitmask; // low byte: bitmask
}
-int ftdi_disable_bitbang(struct ftdi_context *ftdi) {
+int ftdi_disable_bitbang(struct ftdi_context *ftdi)
+{
if (usb_control_msg(ftdi->usb_dev, 0x40, 0x0B, 0, ftdi->index, NULL, 0, ftdi->usb_write_timeout) != 0) {
ftdi->error_str = "Unable to leave bitbang mode. Perhaps not a BM type chip?";
return -1;
}
-int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins) {
+int ftdi_read_pins(struct ftdi_context *ftdi, unsigned char *pins)
+{
unsigned short usb_val;
if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0C, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) {
ftdi->error_str = "Read pins failed";
}
-int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency) {
+int ftdi_set_latency_timer(struct ftdi_context *ftdi, unsigned char latency)
+{
unsigned short usb_val;
if (latency < 1) {
}
-int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency) {
+int ftdi_get_latency_timer(struct ftdi_context *ftdi, unsigned char *latency)
+{
unsigned short usb_val;
if (usb_control_msg(ftdi->usb_dev, 0xC0, 0x0A, 0, ftdi->index, (char *)&usb_val, 1, ftdi->usb_read_timeout) != 1) {
ftdi->error_str = "Reading latency timer failed";
}
-void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom) {
+void ftdi_eeprom_initdefaults(struct ftdi_eeprom *eeprom)
+{
eeprom->vendor_id = 0x0403;
eeprom->product_id = 0x6001;
positive value: used eeprom size
-1: eeprom size (128 bytes) exceeded by custom strings
*/
-int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output) {
+int ftdi_eeprom_build(struct ftdi_eeprom *eeprom, unsigned char *output)
+{
unsigned char i, j;
unsigned short checksum, value;
unsigned char manufacturer_size = 0, product_size = 0, serial_size = 0;
}
-int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) {
+int ftdi_read_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom)
+{
int i;
for (i = 0; i < 64; i++) {
}
-int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom) {
+int ftdi_write_eeprom(struct ftdi_context *ftdi, unsigned char *eeprom)
+{
unsigned short usb_val;
int i;
}
-int ftdi_erase_eeprom(struct ftdi_context *ftdi) {
+int ftdi_erase_eeprom(struct ftdi_context *ftdi)
+{
if (usb_control_msg(ftdi->usb_dev, 0x40, 0x92, 0, 0, NULL, 0, ftdi->usb_write_timeout) != 0) {
ftdi->error_str = "Unable to erase eeprom";
return -1;