diff options
| -rw-r--r-- | utils/hwstub/lib/hwstub.c | 15 | ||||
| -rw-r--r-- | utils/hwstub/lib/hwstub.h | 2 |
2 files changed, 14 insertions, 3 deletions
diff --git a/utils/hwstub/lib/hwstub.c b/utils/hwstub/lib/hwstub.c index 8e5cb98d29..036c97a5d9 100644 --- a/utils/hwstub/lib/hwstub.c +++ b/utils/hwstub/lib/hwstub.c @@ -23,7 +23,7 @@ #include <stdlib.h> #ifndef MIN -#define MIN(a,b) ((a) < (b) ? (a) : (b)) +#define MIN(a,b) ((a) <= (b) ? (a) : (b)) #endif struct hwstub_device_t @@ -32,6 +32,7 @@ struct hwstub_device_t int intf; unsigned buf_sz; uint16_t id; + uint8_t minor_ver; }; int hwstub_probe(libusb_device *dev) @@ -97,9 +98,19 @@ struct hwstub_device_t *hwstub_open(libusb_device_handle *handle) dev->intf = hwstub_probe(mydev); if(dev->intf == -1) goto Lerr; + /* try to get version */ + struct hwstub_version_desc_t m_hwdev_ver; + int sz = hwstub_get_desc(dev, HWSTUB_DT_VERSION, &m_hwdev_ver, sizeof(m_hwdev_ver)); + if(sz != sizeof(m_hwdev_ver)) + goto Lerr; + /* major version must match, minor version is taken to be the minimum between + * what library and device support */ + if(m_hwdev_ver.bMajor != HWSTUB_VERSION_MAJOR) + goto Lerr; + dev->minor_ver = MIN(m_hwdev_ver.bMinor, HWSTUB_VERSION_MINOR); /* try to get actual buffer size */ struct hwstub_layout_desc_t layout; - int sz = hwstub_get_desc(dev, HWSTUB_DT_LAYOUT, &layout, sizeof(layout)); + sz = hwstub_get_desc(dev, HWSTUB_DT_LAYOUT, &layout, sizeof(layout)); if(sz == (int)sizeof(layout)) dev->buf_sz = layout.dBufferSize; return dev; diff --git a/utils/hwstub/lib/hwstub.h b/utils/hwstub/lib/hwstub.h index 1599f6508b..8fb98fe669 100644 --- a/utils/hwstub/lib/hwstub.h +++ b/utils/hwstub/lib/hwstub.h @@ -39,7 +39,7 @@ struct hwstub_device_t; /* Returns hwstub interface, or -1 if none was found */ int hwstub_probe(libusb_device *dev); /* Helper function which returns a list of all hwstub devices found. The caller - * must unref all of them when done, possibly using libusb_free_device_list(). + * must unref all of them when done, possibly using libusb_free_device_list(). * Return number of devices or <0 on error */ ssize_t hwstub_get_device_list(libusb_context *ctx, libusb_device ***list); /* Returns NULL on error */ |