- unsigned int i, patch_found = 0, data_found = 0, data_offset;
- int patch_version, ret = 0;
- const struct firmware *fw_entry;
-
- for (i = 0; i < ARRAY_SIZE(stir421x_patches); i++) {
- if(request_firmware(&fw_entry, stir421x_patches[i], &self->usbdev->dev) != 0) {
- IRDA_ERROR( "%s(), Patch %s is not available\n", __FUNCTION__, stir421x_patches[i]);
- continue;
- }
-
- /* We found a patch from userspace */
- patch_version = stir421x_get_patch_version (fw_entry->data, fw_entry->size);
-
- if (patch_version < 0) {
- /* Couldn't fetch a version, let's move on to the next file */
- IRDA_ERROR("%s(), version parsing failed\n", __FUNCTION__);
- ret = patch_version;
- release_firmware(fw_entry);
- continue;
- }
-
- if (patch_version != self->usbdev->descriptor.bcdDevice) {
- /* Patch version and device don't match */
- IRDA_ERROR ("%s(), wrong patch version (%d <-> %d)\n",
- __FUNCTION__,
- patch_version, self->usbdev->descriptor.bcdDevice);
- ret = -EINVAL;
- release_firmware(fw_entry);
- continue;
- }
-
- /* If we're here, we've found a correct patch */
- patch_found = 1;
- break;
-
- }
-
- /* We couldn't find a valid firmware, let's leave */
- if (!patch_found)
- return ret;
-
- /* The actual image starts after the "STMP" keyword */
- for (data_offset = 0; data_offset < STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET; data_offset++) {
- if (!memcmp(fw_entry->data + data_offset,
- STIR421X_PATCH_DATA_TAG_STR,
- sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET))) {
- IRDA_DEBUG(2, "%s(), found patch data for STIR421x at offset %d\n",
- __FUNCTION__, data_offset);
- data_found = 1;
- break;
- }
- }
-
- /* We couldn't find "STMP" from the header */
- if (!data_found)
- return -EINVAL;
-
- /* Let's upload the patch to the target */
- ret = stir421x_upload_patch(self,
- &fw_entry->data[data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)],
- fw_entry->size - (data_offset + sizeof(STIR421X_PATCH_FILE_IMAGE_MAX_OFFSET)));
-
- release_firmware(fw_entry);
-
- return ret;
-
+ unsigned int i;
+ int ret;
+ char stir421x_fw_name[11];
+ const struct firmware *fw;
+ unsigned char *fw_version_ptr; /* pointer to version string */
+ unsigned long fw_version = 0;
+
+ /*
+ * Known firmware patch file names for STIR421x dongles
+ * are "42101001.sb" or "42101002.sb"
+ */
+ sprintf(stir421x_fw_name, "4210%4X.sb",
+ self->usbdev->descriptor.bcdDevice);
+ ret = request_firmware(&fw, stir421x_fw_name, &self->usbdev->dev);
+ if (ret < 0)
+ return ret;
+
+ /* We get a patch from userspace */
+ IRDA_MESSAGE("%s(): Received firmware %s (%zu bytes)\n",
+ __FUNCTION__, stir421x_fw_name, fw->size);
+
+ ret = -EINVAL;
+
+ /* Get the bcd product version */
+ if (!memcmp(fw->data, STIR421X_PATCH_PRODUCT_VER,
+ sizeof(STIR421X_PATCH_PRODUCT_VER) - 1)) {
+ fw_version_ptr = fw->data +
+ sizeof(STIR421X_PATCH_PRODUCT_VER) - 1;
+
+ /* Let's check if the product version is dotted */
+ if (fw_version_ptr[3] == '.' &&
+ fw_version_ptr[7] == '.') {
+ unsigned long major, minor, build;
+ major = simple_strtoul(fw_version_ptr, NULL, 10);
+ minor = simple_strtoul(fw_version_ptr + 4, NULL, 10);
+ build = simple_strtoul(fw_version_ptr + 8, NULL, 10);
+
+ fw_version = (major << 12)
+ + (minor << 8)
+ + ((build / 10) << 4)
+ + (build % 10);
+
+ IRDA_DEBUG(3, "%s(): Firmware Product version %ld\n",
+ __FUNCTION__, fw_version);
+ }
+ }
+
+ if (self->usbdev->descriptor.bcdDevice == fw_version) {
+ /*
+ * If we're here, we've found a correct patch
+ * The actual image starts after the "STMP" keyword
+ * so forward to the firmware header tag
+ */
+ for (i = 0; (fw->data[i] != STIR421X_PATCH_END_OF_HDR_TAG)
+ && (i < fw->size); i++) ;
+ /* here we check for the out of buffer case */
+ if ((STIR421X_PATCH_END_OF_HDR_TAG == fw->data[i])
+ && (i < STIR421X_PATCH_CODE_OFFSET)) {
+ if (!memcmp(fw->data + i + 1, STIR421X_PATCH_STMP_TAG,
+ sizeof(STIR421X_PATCH_STMP_TAG) - 1)) {
+
+ /* We can upload the patch to the target */
+ i += sizeof(STIR421X_PATCH_STMP_TAG);
+ ret = stir421x_fw_upload(self, &fw->data[i],
+ fw->size - i);
+ }
+ }
+ }
+
+ release_firmware(fw);
+
+ return ret;