ftdi_usb_get_strings(): Don't try to open an already open device

[libftdi] / src / ftdi.c

diff --git a/src/ftdi.c b/src/ftdi.c
index 011f464..add6dc2 100644 (file)
--- a/src/ftdi.c
+++ b/src/ftdi.c
@@ -413,8 +413,8 @@ int ftdi_usb_get_strings(struct ftdi_context * ftdi, struct libusb_device * dev,
     if ((ftdi==NULL) || (dev==NULL))
         return -1;
 
-    if (libusb_open(dev, &ftdi->usb_dev) < 0)
-        ftdi_error_return(-4, "libusb_open() failed");
+    if (ftdi->usb_dev == NULL && 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");
@@ -1018,8 +1018,8 @@ static int ftdi_to_clkbits_AM(int baudrate, unsigned long *encoded_divisor)
     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};
     int divisor, best_divisor, best_baud, best_baud_diff;
-    divisor = 24000000 / baudrate;
     int i;
+    divisor = 24000000 / baudrate;
 
     // Round down to supported fraction (AM only)
     divisor -= am_adjust_dn[divisor & 7];
@@ -1393,7 +1393,7 @@ int ftdi_write_data(struct ftdi_context *ftdi, const unsigned char *buf, int siz
     return offset;
 }
 
-static void ftdi_read_data_cb(struct libusb_transfer *transfer)
+static void LIBUSB_CALL ftdi_read_data_cb(struct libusb_transfer *transfer)
 {
     struct ftdi_transfer_control *tc = (struct ftdi_transfer_control *) transfer->user_data;
     struct ftdi_context *ftdi = tc->ftdi;
@@ -1475,7 +1475,7 @@ static void ftdi_read_data_cb(struct libusb_transfer *transfer)
 }
 
 
-static void ftdi_write_data_cb(struct libusb_transfer *transfer)
+static void LIBUSB_CALL 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;
@@ -3433,14 +3433,14 @@ int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
                     channel_mode[eeprom->channel_a_type],
                     (eeprom->channel_a_driver)?" VCP":"",
                     (eeprom->high_current_a)?" High Current IO":"");
-        if (ftdi->type >= TYPE_232H)
+        if (ftdi->type == TYPE_232H)
         {
             fprintf(stdout,"FT1284 Mode Clock is idle %s, %s first, %sFlow Control\n",
                     (eeprom->clock_polarity)?"HIGH":"LOW",
                     (eeprom->data_order)?"LSB":"MSB",
                     (eeprom->flow_control)?"":"No ");
         }
-        if ((ftdi->type >= TYPE_2232C) && (ftdi->type != TYPE_R) && (ftdi->type != TYPE_232H))
+        if ((ftdi->type == TYPE_2232H) || (ftdi->type == TYPE_4232H))
             fprintf(stdout,"Channel B has Mode %s%s%s\n",
                     channel_mode[eeprom->channel_b_type],
                     (eeprom->channel_b_driver)?" VCP":"",
@@ -3503,7 +3503,7 @@ int ftdi_eeprom_decode(struct ftdi_context *ftdi, int verbose)
                                  "I2C_TXE#", "I2C_RXF#", "VBUS_SENSE", "BB_WR#",
                                  "BBRD#", "TIME_STAMP", "AWAKE#",
                                 };
-            fprintf(stdout,"IOBUS has %d mA drive%s%s\n",
+            fprintf(stdout,"DBUS has %d mA drive%s%s\n",
                     (eeprom->group0_drive+1) *4,
                     (eeprom->group0_schmitt)?" Schmitt Input":"",
                     (eeprom->group0_slew)?" Slow Slew":"");