int btmtk_setup_firmware_79xx()

in btmtk.c [56:169]

• 98 lines of code
• 13 McCabe index (conditional complexity)

int btmtk_setup_firmware_79xx(struct hci_dev *hdev, const char *fwname,
			      wmt_cmd_sync_func_t wmt_cmd_sync)
{
	struct btmtk_hci_wmt_params wmt_params;
	struct btmtk_global_desc *globaldesc = NULL;
	struct btmtk_section_map *sectionmap;
	const struct firmware *fw;
	const u8 *fw_ptr;
	const u8 *fw_bin_ptr;
	int err, dlen, i, status;
	u8 flag, first_block, retry;
	u32 section_num, dl_size, section_offset;
	u8 cmd[64];

	err = request_firmware(&fw, fwname, &hdev->dev);
	if (err < 0) {
		bt_dev_err(hdev, "Failed to load firmware file (%d)", err);
		return err;
	}

	fw_ptr = fw->data;
	fw_bin_ptr = fw_ptr;
	globaldesc = (struct btmtk_global_desc *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE);
	section_num = le32_to_cpu(globaldesc->section_num);

	for (i = 0; i < section_num; i++) {
		first_block = 1;
		fw_ptr = fw_bin_ptr;
		sectionmap = (struct btmtk_section_map *)(fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE +
			      MTK_FW_ROM_PATCH_GD_SIZE + MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i);

		section_offset = le32_to_cpu(sectionmap->secoffset);
		dl_size = le32_to_cpu(sectionmap->bin_info_spec.dlsize);

		if (dl_size > 0) {
			retry = 20;
			while (retry > 0) {
				cmd[0] = 0; /* 0 means legacy dl mode. */
				memcpy(cmd + 1,
				       fw_ptr + MTK_FW_ROM_PATCH_HEADER_SIZE +
				       MTK_FW_ROM_PATCH_GD_SIZE +
				       MTK_FW_ROM_PATCH_SEC_MAP_SIZE * i +
				       MTK_SEC_MAP_COMMON_SIZE,
				       MTK_SEC_MAP_NEED_SEND_SIZE + 1);

				wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
				wmt_params.status = &status;
				wmt_params.flag = 0;
				wmt_params.dlen = MTK_SEC_MAP_NEED_SEND_SIZE + 1;
				wmt_params.data = &cmd;

				err = wmt_cmd_sync(hdev, &wmt_params);
				if (err < 0) {
					bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
						   err);
					goto err_release_fw;
				}

				if (status == BTMTK_WMT_PATCH_UNDONE) {
					break;
				} else if (status == BTMTK_WMT_PATCH_PROGRESS) {
					msleep(100);
					retry--;
				} else if (status == BTMTK_WMT_PATCH_DONE) {
					goto next_section;
				} else {
					bt_dev_err(hdev, "Failed wmt patch dwnld status (%d)",
						   status);
					err = -EIO;
					goto err_release_fw;
				}
			}

			fw_ptr += section_offset;
			wmt_params.op = BTMTK_WMT_PATCH_DWNLD;
			wmt_params.status = NULL;

			while (dl_size > 0) {
				dlen = min_t(int, 250, dl_size);
				if (first_block == 1) {
					flag = 1;
					first_block = 0;
				} else if (dl_size - dlen <= 0) {
					flag = 3;
				} else {
					flag = 2;
				}

				wmt_params.flag = flag;
				wmt_params.dlen = dlen;
				wmt_params.data = fw_ptr;

				err = wmt_cmd_sync(hdev, &wmt_params);
				if (err < 0) {
					bt_dev_err(hdev, "Failed to send wmt patch dwnld (%d)",
						   err);
					goto err_release_fw;
				}

				dl_size -= dlen;
				fw_ptr += dlen;
			}
		}
next_section:
		continue;
	}
	/* Wait a few moments for firmware activation done */
	usleep_range(100000, 120000);

err_release_fw:
	release_firmware(fw);

	return err;
}