1 // SPDX-License-Identifier: GPL-2.0-only
3  * ONIE tlv NVMEM cells provider
8  * Inspired by the first layout written by: Rafał Miłecki <rafal@milecki.pl>
13 #include <linux/nvmem-consumer.h>
14 #include <linux/nvmem-provider.h>
37 		return "product-name";  in onie_tlv_cell_name()
39 		return "part-number";  in onie_tlv_cell_name()
41 		return "serial-number";  in onie_tlv_cell_name()
43 		return "mac-address";  in onie_tlv_cell_name()
45 		return "manufacture-date";  in onie_tlv_cell_name()
47 		return "device-version";  in onie_tlv_cell_name()
49 		return "label-revision";  in onie_tlv_cell_name()
51 		return "platform-name";  in onie_tlv_cell_name()
53 		return "onie-version";  in onie_tlv_cell_name()
55 		return "num-macs";  in onie_tlv_cell_name()
59 		return "country-code";  in onie_tlv_cell_name()
63 		return "diag-version";  in onie_tlv_cell_name()
65 		return "service-tag";  in onie_tlv_cell_name()
67 		return "vendor-extension";  in onie_tlv_cell_name()
102 	struct device_node *layout;  in onie_tlv_add_cells()  local
103 	struct onie_tlv tlv;  in onie_tlv_add_cells()  local
108 	layout = of_nvmem_layout_get_container(nvmem);  in onie_tlv_add_cells()
109 	if (!layout)  in onie_tlv_add_cells()
110 		return -ENOENT;  in onie_tlv_add_cells()
113 		memcpy(&tlv, data + offset, sizeof(tlv));  in onie_tlv_add_cells()
114 		if (offset + tlv.len >= data_len) {  in onie_tlv_add_cells()
116 				tlv.len, hdr_len + offset);  in onie_tlv_add_cells()
120 		cell.name = onie_tlv_cell_name(tlv.type);  in onie_tlv_add_cells()
124 		cell.offset = hdr_len + offset + sizeof(tlv.type) + sizeof(tlv.len);  in onie_tlv_add_cells()
125 		cell.bytes = tlv.len;  in onie_tlv_add_cells()
126 		cell.np = of_get_child_by_name(layout, cell.name);  in onie_tlv_add_cells()
127 		cell.read_post_process = onie_tlv_read_cb(tlv.type, data + offset + sizeof(tlv));  in onie_tlv_add_cells()
131 			of_node_put(layout);  in onie_tlv_add_cells()
135 		offset += sizeof(tlv) + tlv.len;  in onie_tlv_add_cells()
138 	of_node_put(layout);  in onie_tlv_add_cells()
145 	if (memcmp(hdr->id, ONIE_TLV_HDR_ID, sizeof(hdr->id))) {  in onie_tlv_hdr_is_valid()
150 	if (hdr->version != 0x1) {  in onie_tlv_hdr_is_valid()
164 	memcpy(&crc_hdr, table + table_len - ONIE_TLV_CRC_FIELD_SZ, sizeof(crc_hdr));  in onie_tlv_crc_is_valid()
173 	memcpy(&crc_be, table + table_len - ONIE_TLV_CRC_SZ, ONIE_TLV_CRC_SZ);  in onie_tlv_crc_is_valid()
175 	calc_crc = crc32(~0, table, table_len - ONIE_TLV_CRC_SZ) ^ 0xFFFFFFFF;  in onie_tlv_crc_is_valid()
197 		dev_err(dev, "Invalid ONIE TLV header\n");  in onie_tlv_parse_table()
198 		return -EINVAL;  in onie_tlv_parse_table()
205 		dev_err(dev, "Invalid ONIE TLV data length\n");  in onie_tlv_parse_table()
206 		return -EINVAL;  in onie_tlv_parse_table()
211 		return -ENOMEM;  in onie_tlv_parse_table()
218 		return -EINVAL;  in onie_tlv_parse_table()
229 	{ .compatible = "onie,tlv-layout", },
235 	.name = "ONIE tlv layout",
243 MODULE_DESCRIPTION("NVMEM layout driver for Onie TLV table parsing");