Fix for libusb_kernel_driver_active & error handling for st.st_size

doc/man/st-flash.md

@@ -20,8 +20,7 @@ You can use this instead of st-util(1) if you prefer, but remember to use the
 
 Use hexadecimal format for the *ADDR* and *SIZE*.
 
-The STLink device to use can be specified using the --serial parameter, or via 
-the environment variable STLINK_DEVICE on the format <USB_BUS>:<USB_ADDR>.
+The STLink device to use can be specified using the --serial parameter.
 
 # COMMANDS
 
@@ -52,7 +51,7 @@ reset
 :   Enable ignore ending empty bytes optimization
 
 \--serial *iSerial*
-:   TODO
+:   Serial number of ST-LINK device to use
 
 \--flash=fsize
 :   Where fsize is the size in decimal, octal, or hex followed by an optional multiplier 

doc/man/st-info.md

@@ -15,9 +15,6 @@ st-info - Provides information about connected STLink and STM32 devices
 Provides information about connected STLink programmers and STM32 devices:
 Serial code, flash, page size, sram, chipid, description.
 
-The STLink device to probe can be specified via the environment variable
-STLINK_DEVICE on the format <USB_BUS>:<USB_ADDR>.
-
 # OPTIONS
 
 \--version

doc/man/st-util.1

@@ -18,9 +18,6 @@ option, the default \f[B]4242\f[R] port will be used.
 .PP
 Stlink version 2 is used by default unless the option
 \f[B]\[en]stlinkv1\f[R] is given.
-.PP
-The STLinkV2 device to use can be specified in the environment variable
-STLINK_DEVICE on the format :.
 .SH OPTIONS
 .TP
 .B \-h, \-\-help

doc/man/st-util.md

@@ -17,8 +17,7 @@ Run the main binary of the local package (src/main.rs).
 If a port number is not specified using the **--listen_port** option, the
 default **4242** port will be used.
 
-The STLink device to use can be specified using the --serial parameter, or via 
-the environment variable STLINK_DEVICE on the format <USB_BUS>:<USB_ADDR>.
+The STLink device to use can be specified using the --serial parameter.
 
 # OPTIONS
 

doc/tutorial.md

@@ -244,8 +244,7 @@ There are a few options:
 			Do not reset board on connection.
 ```
 
-The STLink device to use can be specified using the --serial parameter, or via
-the environment variable STLINK_DEVICE on the format <USB_BUS>:<USB_ADDR>.
+The STLink device to use can be specified using the --serial parameter.
 
 Then, in your project directory, someting like this...
 (remember, you need to run an _ARM_ gdb, not an x86 gdb)

src/common.c

@@ -2198,14 +2198,12 @@ static int map_file(mapped_file_t *mf, const char *path) {
     goto on_error;
   }
 
-  if (sizeof(st.st_size) != sizeof(size_t)) {
-    // on 32 bit systems, check if there is an overflow
-    if (st.st_size > (off_t)SSIZE_MAX) {
-      fprintf(stderr, "mmap() size_t overflow for file %s\n", path);
-      goto on_error;
-    }
+  if (st.st_size > (intmax_t) SIZE_MAX ) {
+    fprintf(stderr, "mmap() file %s too big\n", path);
+    goto on_error;
   }
 
+
   mf->base =
       (uint8_t *)mmap(NULL, (size_t)(st.st_size), PROT_READ, MAP_SHARED, fd, 0);
 

src/stlink-lib/usb.c

@@ -1134,33 +1134,8 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, enum connect_type connect,
 #endif
 
     libusb_device **list = NULL;
-    // TODO: We should use ssize_t and use it as a counter if > 0.
-    // As per libusb API: ssize_t libusb_get_device_list (libusb_context *ctx, libusb_device ***list)
-    int cnt = (int)libusb_get_device_list(slu->libusb_ctx, &list);
+    ssize_t cnt = libusb_get_device_list(slu->libusb_ctx, &list);
     struct libusb_device_descriptor desc;
-    int devBus  = 0;
-    int devAddr = 0;
-
-    // TODO: Reading a environment variable in a usb open function is not very nice, this should
-    // be refactored and moved into the CLI tools, and instead of giving USB_BUS:USB_ADDR a real
-    // stlink serial string should be passed to this function. Probably people are using this
-    // but this is very odd because as programmer can change to multiple busses and it is better
-    // to detect them based on serial.
-    char *device = getenv("STLINK_DEVICE");
-
-    if (device) {
-        char *c = strchr(device, ':');
-
-        if (c == NULL) {
-            WLOG("STLINK_DEVICE must be <USB_BUS>:<USB_ADDR> format\n");
-            goto on_error;
-        }
-
-        devBus = atoi(device);
-        *c++ = 0;
-        devAddr = atoi(c);
-        ILOG("bus %03d dev %03d\n", devBus, devAddr);
-    }
 
     while (cnt-- > 0) {
         struct libusb_device_handle *handle;
@@ -1169,13 +1144,6 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, enum connect_type connect,
 
         if (desc.idVendor != STLINK_USB_VID_ST) { continue; }
 
-        if (devBus && devAddr) {
-            if ((libusb_get_bus_number(list[cnt]) != devBus) ||
-                (libusb_get_device_address(list[cnt]) != devAddr)) {
-                continue;
-            }
-        }
-
         ret = libusb_open(list[cnt], &handle);
 
         if (ret) { continue; } // could not open device
@@ -1202,7 +1170,7 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, enum connect_type connect,
     }
 
     if (cnt < 0) {
-        WLOG ("Couldn't find %s ST-Link devices\n", (devBus && devAddr) ? "matched" : "any");
+        WLOG ("Couldn't find any ST-Link devices\n");
         libusb_free_device_list(list, 1);
         goto on_error;
     } else {
@@ -1221,6 +1189,8 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, enum connect_type connect,
 
     libusb_free_device_list(list, 1);
 
+// libusb_kernel_driver_active is not available on Windows.
+#if !defined(_WIN32)
     if (libusb_kernel_driver_active(slu->usb_handle, 0) == 1) {
         ret = libusb_detach_kernel_driver(slu->usb_handle, 0);
 
@@ -1229,6 +1199,7 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, enum connect_type connect,
             goto on_libusb_error;
         }
     }
+#endif
 
     if (libusb_get_configuration(slu->usb_handle, &config)) {
         // this may fail for a previous configured device
@@ -1287,7 +1258,7 @@ stlink_t *stlink_open_usb(enum ugly_loglevel verbose, enum connect_type connect,
         // the NRST pin must be pull down before selecting the SWD/JTAG mode
         if (mode == STLINK_DEV_DEBUG_MODE) {
             DLOG("-- exit_debug_mode\n");
-            _stlink_usb_exit_dfu_mode(sl);
+            _stlink_usb_exit_debug_mode(sl);
         }
 
         _stlink_usb_jtag_reset(sl, STLINK_DEBUG_APIV2_DRIVE_NRST_LOW);