/* HM-CFG-USB libusb-driver
*
- * Copyright (c) 2013 Michael Gernoth <michael@gernoth.net>
+ * Copyright (c) 2013-16 Michael Gernoth <michael@gernoth.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
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)
+static const char* usb_strerror(int e)
{
static char unknerr[256];
return unknerr;
}
-static libusb_device_handle *hmcfgusb_find(int vid, int pid) {
+static const char* usb_str_transfer_status(int e)
+{
+ static char unknerr[256];
+
+ switch (e) {
+ case LIBUSB_TRANSFER_COMPLETED:
+ return "Transfer completed";
+ case LIBUSB_TRANSFER_ERROR:
+ return "Transfer error";
+ case LIBUSB_TRANSFER_TIMED_OUT:
+ return "Transfer timed out";
+ case LIBUSB_TRANSFER_CANCELLED:
+ return "Transfer cancelled";
+ case LIBUSB_TRANSFER_STALL:
+ return "No device";
+ case LIBUSB_TRANSFER_OVERFLOW:
+ return "Transfer overflow";
+ };
+ snprintf(unknerr, sizeof(unknerr), "Unknown transfer status %d / 0x%02x", e, e);
+ return unknerr;
+}
+
+static libusb_device_handle *hmcfgusb_find(int vid, int pid, char *serial) {
libusb_device_handle *devh = NULL;
libusb_device **list;
ssize_t cnt;
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;
}
+ if (serial) {
+ if (desc.iSerialNumber > 0) {
+ uint8_t devSerial[256];
+ err = libusb_get_string_descriptor_ascii(devh, desc.iSerialNumber, devSerial, sizeof(devSerial));
+ if (err < 0) {
+ fprintf(stderr, "Can't read serial-number: %s\n", usb_strerror(err));
+ libusb_close(devh);
+ libusb_free_device_list(list, 1);
+ return NULL;
+ }
+ if (strcmp((char*)devSerial, (char*)serial)) {
+ libusb_close(devh);
+ continue;
+ }
+ } else {
+ libusb_close(devh);
+ continue;
+ }
+ }
+
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;
}
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_str_transfer_status(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) {
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, "> ");
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);
}
}
-struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data)
+struct hmcfgusb_dev *hmcfgusb_init(hmcfgusb_cb_fn cb, void *data, char *serial)
{
libusb_device_handle *devh = NULL;
const struct libusb_pollfd **usb_pfd = NULL;
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);
+ devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT, serial);
if (!devh) {
- devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT_BL);
+ devh = hmcfgusb_find(ID_VENDOR, ID_PRODUCT_BL, serial);
if (!devh) {
- fprintf(stderr, "Can't find/open hmcfgusb!\n");
- libusb_exit(NULL);
+ if (serial) {
+ fprintf(stderr, "Can't find/open HM-CFG-USB with serial %s!\n", serial);
+ } else {
+ fprintf(stderr, "Can't find/open HM-CFG-USB!\n");
+ }
+#ifdef NEED_LIBUSB_EXIT
+ hmcfgusb_exit();
+#endif
return NULL;
}
bootloader = 1;
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;
}
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;
}
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;
}
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;
}
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;
}
}
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;
if (dev->transfer) {
libusb_cancel_transfer(dev->transfer);
+ libusb_handle_events(NULL);
}
err = libusb_release_interface(dev->usb_devh, INTERFACE);
}
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)
projects / hmcfgusb / blobdiff