+static const struct firmware *rtmp_get_firmware(struct rt_rtmp_adapter *adapter)
+{
+ const char *name;
+ const struct firmware *fw = NULL;
+ u8 min_version;
+ struct device *dev;
+ int err;
+
+ if (adapter->firmware)
+ return adapter->firmware;
+
+#ifdef RTMP_MAC_USB
+ if (IS_RT3071(adapter)) {
+ name = FIRMWARE_3071_FILENAME;
+ min_version = FIRMWARE_3071_MIN_VERSION;
+ } else if (IS_RT3070(adapter)) {
+ name = FIRMWARE_3070_FILENAME;
+ min_version = FIRMWARE_3070_MIN_VERSION;
+ } else {
+ name = FIRMWARE_2870_FILENAME;
+ min_version = FIRMWARE_2870_MIN_VERSION;
+ }
+ dev = &((struct os_cookie *)adapter->OS_Cookie)->pUsb_Dev->dev;
+#else /* RTMP_MAC_PCI */
+ if (IS_RT3090(adapter) || IS_RT3390(adapter)) {
+ name = FIRMWARE_3090_FILENAME;
+ min_version = FIRMWARE_3090_MIN_VERSION;
+ } else {
+ name = FIRMWARE_2860_FILENAME;
+ min_version = FIRMWARE_2860_MIN_VERSION;
+ }
+ dev = &((struct os_cookie *)adapter->OS_Cookie)->pci_dev->dev;
+#endif
+
+ err = request_firmware(&fw, name, dev);
+ if (err) {
+ dev_err(dev, "firmware file %s request failed (%d)\n",
+ name, err);
+ return NULL;
+ }
+
+ if (fw->size < FIRMWAREIMAGE_LENGTH) {
+ dev_err(dev, "firmware file %s size is invalid\n", name);
+ goto invalid;
+ }
+
+ /* is it new enough? */
+ adapter->FirmwareVersion = fw->data[FIRMWAREIMAGE_LENGTH - 3];
+ if (adapter->FirmwareVersion < min_version) {
+ dev_err(dev,
+ "firmware file %s is too old;"
+ " driver requires v%d or later\n",
+ name, min_version);
+ goto invalid;
+ }
+
+ /* is the internal CRC correct? */
+ if (crc_ccitt(0xffff, fw->data, FIRMWAREIMAGE_LENGTH - 2) !=
+ (fw->data[FIRMWAREIMAGE_LENGTH - 2] |
+ (fw->data[FIRMWAREIMAGE_LENGTH - 1] << 8))) {
+ dev_err(dev, "firmware file %s failed internal CRC\n", name);
+ goto invalid;
+ }
+
+ adapter->firmware = fw;
+ return fw;
+
+invalid:
+ release_firmware(fw);
+ return NULL;
+}
+