flash-ota: automatically send devices to bootloader

[hmcfgusb] / hmcfgusb.c

diff --git a/hmcfgusb.c b/hmcfgusb.c
index 90d741f347ab173b7abcfb1d1cc1f953b916e77e..652eb429c013b9e70ee7283b4c175b50ab4dc4f1 100644 (file)
--- a/hmcfgusb.c
+++ b/hmcfgusb.c
@@ -58,6 +58,7 @@
 
 static int quit = 0;
 static int debug = 0;
+static int libusb_initialized = 0;
 
 /* Not in all libusb-1.0 versions, so we have to roll our own :-( */
 static char * usb_strerror(int e)
@@ -124,26 +125,33 @@ static libusb_device_handle *hmcfgusb_find(int vid, int pid) {
                        err = libusb_open(dev, &devh);
                        if (err) {
                                fprintf(stderr, "Can't open device: %s\n", usb_strerror(err));
+                               libusb_free_device_list(list, 1);
                                return NULL;
                        }
 
                        err = libusb_detach_kernel_driver(devh, INTERFACE);
                        if ((err != 0) && (err != LIBUSB_ERROR_NOT_FOUND)) {
                                fprintf(stderr, "Can't detach kernel driver: %s\n", usb_strerror(err));
+                               libusb_close(devh);
+                               libusb_free_device_list(list, 1);
                                return NULL;
                        }
 
                        err = libusb_claim_interface(devh, INTERFACE);
                        if ((err != 0)) {
                                fprintf(stderr, "Can't claim interface: %s\n", usb_strerror(err));
+                               libusb_close(devh);
+                               libusb_free_device_list(list, 1);
                                return NULL;
                        }
 
+                       libusb_free_device_list(list, 0);
                        return devh;
                }
 
        }
 
+       libusb_free_device_list(list, 1);
        return NULL;
 }
 
@@ -223,7 +231,7 @@ static struct libusb_transfer *hmcfgusb_prepare_int(libusb_device_handle *devh,
        libusb_fill_interrupt_transfer(transfer, devh, EP_IN,
                        data_buf, in_size, cb, data, USB_TIMEOUT);
 
-       transfer->flags = LIBUSB_TRANSFER_SHORT_NOT_OK | LIBUSB_TRANSFER_FREE_BUFFER;
+       transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER;
 
        err = libusb_submit_transfer(transfer);
        if (err != 0) {
@@ -250,15 +258,11 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 
        if (transfer->status != LIBUSB_TRANSFER_COMPLETED) {
                if (transfer->status != LIBUSB_TRANSFER_TIMED_OUT) {
-                       fprintf(stderr, "Interrupt transfer not completed: %s!\n", usb_strerror(transfer->status));
-                       quit = EIO;
+                       if (transfer->status != LIBUSB_TRANSFER_CANCELLED)
+                               fprintf(stderr, "Interrupt transfer not completed: %s!\n", usb_strerror(transfer->status));
 
-                       if (cb_data && cb_data->dev && cb_data->dev->transfer) {
-                               libusb_free_transfer(cb_data->dev->transfer);
-                               cb_data->dev->transfer = NULL;
-                               free(cb_data);
-                       }
-                       return;
+                       quit = EIO;
+                       goto out;
                }
        } else {
                if (cb_data && cb_data->cb) {
@@ -267,14 +271,7 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
 
                        if (!cb_data->cb(transfer->buffer, transfer->actual_length, cb_data->data)) {
                                quit = EIO;
-
-                               if (cb_data && cb_data->dev && cb_data->dev->transfer) {
-                                       libusb_free_transfer(cb_data->dev->transfer);
-                                       cb_data->dev->transfer = NULL;
-                                       free(cb_data);
-                               }
-
-                               return;
+                               goto out;
                        }
                } else {
                        hexdump(transfer->buffer, transfer->actual_length, "> ");
@@ -284,8 +281,17 @@ static void LIBUSB_CALL hmcfgusb_interrupt(struct libusb_transfer *transfer)
        err = libusb_submit_transfer(transfer);
        if (err != 0) {
                fprintf(stderr, "Can't re-submit transfer: %s\n", usb_strerror(err));
-               libusb_free_transfer(transfer);
-               cb_data->dev->transfer = NULL;
+               goto out;
+       }
+
+       return;
+
+out:
+       libusb_free_transfer(transfer);
+       if (cb_data) {
+               if (cb_data->dev && cb_data->dev->transfer) {
+                       cb_data->dev->transfer = NULL;
+               }
                free(cb_data);
        }
 }
@@ -300,18 +306,23 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
        int err;
        int i;
 
-       err = libusb_init(NULL);
-       if (err != 0) {
-               fprintf(stderr, "Can't initialize libusb: %s\n", usb_strerror(err));
-               return NULL;
+       if (!libusb_initialized) {
+               err = libusb_init(NULL);
+               if (err != 0) {
+                       fprintf(stderr, "Can't initialize libusb: %s\n", usb_strerror(err));
+                       return NULL;
+               }
        }
+       libusb_initialized = 1;
 
        devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT);
        if (!devh) {
                devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT_BL);
                if (!devh) {
                        fprintf(stderr, "Can't find/open hmcfgusb!\n");
-                       libusb_exit(NULL);
+#ifdef NEED_LIBUSB_EXIT
+                       hmcfgusb_exit();
+#endif
                        return NULL;
                }
                bootloader = 1;
@@ -321,7 +332,9 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
        if (!dev) {
                perror("Can't allocate memory for hmcfgusb_dev");
                libusb_close(devh);
-               libusb_exit(NULL);
+#ifdef NEED_LIBUSB_EXIT
+               hmcfgusb_exit();
+#endif
                return NULL;
        }
 
@@ -335,7 +348,9 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
                perror("Can't allocate memory for hmcfgusb_cb_data");
                free(dev);
                libusb_close(devh);
-               libusb_exit(NULL);
+#ifdef NEED_LIBUSB_EXIT
+               hmcfgusb_exit();
+#endif
                return NULL;
        }
 
@@ -345,28 +360,30 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
        cb_data->cb = cb;
        cb_data->data = data;
 
-       /* Bootloader can only say ack/nack/done */
-       if (dev->bootloader)
-               dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data, 1);
-       else
-               dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data, ASYNC_SIZE);
+       dev->transfer = hmcfgusb_prepare_int(devh, hmcfgusb_interrupt, cb_data, ASYNC_SIZE);
 
        if (!dev->transfer) {
                fprintf(stderr, "Can't prepare async device io!\n");
                free(dev);
                free(cb_data);
                libusb_close(devh);
-               libusb_exit(NULL);
+#ifdef NEED_LIBUSB_EXIT
+               hmcfgusb_exit();
+#endif
                return NULL;
        }
 
        usb_pfd = libusb_get_pollfds(NULL);
        if (!usb_pfd) {
                fprintf(stderr, "Can't get FDset from libusb!\n");
+               libusb_cancel_transfer(dev->transfer);
+               libusb_handle_events(NULL);
                free(dev);
                free(cb_data);
                libusb_close(devh);
-               libusb_exit(NULL);
+#ifdef NEED_LIBUSB_EXIT
+               hmcfgusb_exit();
+#endif
                return NULL;
        }
 
@@ -377,10 +394,14 @@ struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
        dev->pfd = malloc(dev->n_usb_pfd * sizeof(struct pollfd));
        if (!dev->pfd) {
                perror("Can't allocate memory for poll-fds");
+               libusb_cancel_transfer(dev->transfer);
+               libusb_handle_events(NULL);
                free(dev);
                free(cb_data);
                libusb_close(devh);
-               libusb_exit(NULL);
+#ifdef NEED_LIBUSB_EXIT
+               hmcfgusb_exit();
+#endif
                return NULL;
        }
 
@@ -437,13 +458,11 @@ int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
                return -1;
        } else if (err == 0) {
                /* No pending timeout or a sane platform */
-               tv.tv_sec = timeout;
        } else {
                if ((tv.tv_sec == 0) && (tv.tv_usec == 0)) {
                        usb_event = 1;
-               } else if (tv.tv_sec > timeout) {
-                       tv.tv_sec = timeout;
-                       tv.tv_usec = 0;
+               } else if ((tv.tv_sec * 1000) < timeout) {
+                       timeout = tv.tv_sec * 1000;
                }
        }
 
@@ -452,7 +471,7 @@ int hmcfgusb_poll(struct hmcfgusb_dev *dev, int timeout)
                        dev->pfd[i].revents = 0;
                }
 
-               n = poll(dev->pfd, dev->n_pfd, tv.tv_sec * 1000);
+               n = poll(dev->pfd, dev->n_pfd, timeout);
                if (n < 0) {
                        perror("poll");
                        errno = 0;
@@ -535,6 +554,7 @@ void hmcfgusb_close(struct hmcfgusb_dev *dev)
 
        if (dev->transfer) {
                libusb_cancel_transfer(dev->transfer);
+               libusb_handle_events(NULL);
        }
 
        err = libusb_release_interface(dev->usb_devh, INTERFACE);
@@ -543,10 +563,19 @@ void hmcfgusb_close(struct hmcfgusb_dev *dev)
        }
 
        libusb_close(dev->usb_devh);
+#ifdef NEED_LIBUSB_EXIT
+       hmcfgusb_exit();
+#endif
        free(dev->pfd);
        free(dev);
+}
 
-       libusb_exit(NULL);
+void hmcfgusb_exit(void)
+{
+       if (libusb_initialized) {
+               libusb_exit(NULL);
+               libusb_initialized = 0;
+       }
 }
 
 void hmcfgusb_set_debug(int d)