1 // SPDX-License-Identifier: GPL-2.0-only
3  * ONIE tlv NVMEM cells provider
7  * Based on the nvmem driver written by: Vadym Kochan <vadym.kochan@plvision.eu>
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()
98 static int onie_tlv_add_cells(struct device *dev, struct nvmem_device *nvmem,  in onie_tlv_add_cells()  argument
102 	struct device_node *layout;  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()
126 		cell.np = of_get_child_by_name(layout, cell.name);  in onie_tlv_add_cells()
129 		ret = nvmem_add_one_cell(nvmem, &cell);  in onie_tlv_add_cells()
131 			of_node_put(layout);  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()
185 static int onie_tlv_parse_table(struct nvmem_layout *layout)  in onie_tlv_parse_table()  argument
187 	struct nvmem_device *nvmem = layout->nvmem;  in onie_tlv_parse_table()  local
188 	struct device *dev = &layout->dev;  in onie_tlv_parse_table()
194 	ret = nvmem_device_read(nvmem, 0, sizeof(hdr), &hdr);  in onie_tlv_parse_table()
200 		return -EINVAL;  in onie_tlv_parse_table()
208 		return -EINVAL;  in onie_tlv_parse_table()
213 		return -ENOMEM;  in onie_tlv_parse_table()
215 	ret = nvmem_device_read(nvmem, 0, table_len, table);  in onie_tlv_parse_table()
220 		return -EINVAL;  in onie_tlv_parse_table()
223 	ret = onie_tlv_add_cells(dev, nvmem, data_len, data);  in onie_tlv_parse_table()
230 static int onie_tlv_probe(struct nvmem_layout *layout)  in onie_tlv_probe()  argument
232 	layout->add_cells = onie_tlv_parse_table;  in onie_tlv_probe()
234 	return nvmem_layout_register(layout);  in onie_tlv_probe()
237 static void onie_tlv_remove(struct nvmem_layout *layout)  in onie_tlv_remove()  argument
239 	nvmem_layout_unregister(layout);  in onie_tlv_remove()
243 	{ .compatible = "onie,tlv-layout", },
250 		.name = "onie-tlv-layout",
260 MODULE_DESCRIPTION("NVMEM layout driver for Onie TLV table parsing");