--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Tudor Ambarus <tudor.ambarus@microchip.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <env.h>
+#include <linux/mtd/spi-nor.h>
+#include <netdev.h>
+
+#define ETH_ADDR_SIZE 6
+
+#ifdef CONFIG_SPI_FLASH_SST
+#define SFDP_MICROCHIP_MANUF_ID 0xbf
+#define SFDP_MICROCHIP_MEM_TYPE 0x26
+#define SFDP_MICROCHIP_DEV_ID 0x43
+
+#define SFDP_MICROCHIP_EUI_OFFSET 0x60
+#define SFDP_MICROCHIP_EUI48 0x30
+
+struct sst26vf064beui {
+ u8 manufacturer_id;
+ u8 memory_type;
+ u8 device_id;
+ u8 reserved;
+};
+
+/**
+ * sst26vf064beui_check() - Check the validity of the EUI-48 information from
+ * the sst26vf064beui SPI NOR Microchip SFDP table.
+ * @manufacturer_sfdp: pointer to the Microchip manufacturer specific SFDP
+ * table.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int sst26vf064beui_check(const u8 *manufacturer_sfdp)
+{
+ struct sst26vf064beui *sst26vf064beui =
+ (struct sst26vf064beui *)manufacturer_sfdp;
+
+ if (sst26vf064beui->manufacturer_id != SFDP_MICROCHIP_MANUF_ID)
+ return -EINVAL;
+
+ if (sst26vf064beui->memory_type != SFDP_MICROCHIP_MEM_TYPE)
+ return -EINVAL;
+
+ if (sst26vf064beui->device_id != SFDP_MICROCHIP_DEV_ID)
+ return -EINVAL;
+
+ /*
+ * Check if the EUI-48 MAC address is programmed in the next six address
+ * locations.
+ */
+ if (manufacturer_sfdp[SFDP_MICROCHIP_EUI_OFFSET] !=
+ SFDP_MICROCHIP_EUI48)
+ return -EINVAL;
+
+ return 0;
+}
+
+/**
+ * sst26vf064beui_get_ethaddr() - Get the ethernet address from the
+ * sst26vf064beui SPI NOR Microchip SFDP table.
+ * @manufacturer_sfdp: pointer to the Microchip manufacturer specific SFDP
+ * table.
+ * @ethaddr: pointer where to fill the ethernet address
+ * @size: size of the ethernet address.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int sst26vf064beui_get_ethaddr(const u8 *manufacturer_sfdp,
+ u8 *ethaddr, size_t size)
+{
+ u64 eui_table[2];
+ u64 *p = (u64 *)&manufacturer_sfdp[SFDP_MICROCHIP_EUI_OFFSET];
+ int i, ret;
+
+ ret = sst26vf064beui_check(manufacturer_sfdp);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < 2; i++)
+ eui_table[i] = le64_to_cpu(p[i]);
+
+ /* Ethaddr starts at offset one. */
+ memcpy(ethaddr, &((u8 *)eui_table)[1], size);
+
+ return 0;
+}
+#endif
+
+/**
+ * at91_spi_nor_set_ethaddr() - Retrieve and set the ethernet address from the
+ * SPI NOR manufacturer specific SFDP table.
+ */
+void at91_spi_nor_set_ethaddr(void)
+{
+ struct udevice *dev;
+ struct spi_nor *nor;
+ const char *ethaddr_name = "ethaddr";
+ u8 ethaddr[ETH_ADDR_SIZE] = {0};
+
+ if (env_get(ethaddr_name))
+ return;
+
+ if (uclass_first_device_err(UCLASS_SPI_FLASH, &dev))
+ return;
+
+ nor = dev_get_uclass_priv(dev);
+ if (!nor)
+ return;
+
+ if (!nor->manufacturer_sfdp)
+ return;
+
+#ifdef CONFIG_SPI_FLASH_SST
+ if (sst26vf064beui_get_ethaddr(nor->manufacturer_sfdp, ethaddr,
+ ETH_ADDR_SIZE))
+ return;
+#endif
+
+ if (is_valid_ethaddr(ethaddr))
+ eth_env_set_enetaddr(ethaddr_name, ethaddr);
+}
#define SFDP_BFPT_ID 0xff00 /* Basic Flash Parameter Table */
#define SFDP_SECTOR_MAP_ID 0xff81 /* Sector Map Table */
+#define SFDP_SST_ID 0x01bf /* Manufacturer specific Table */
#define SFDP_SIGNATURE 0x50444653U
#define SFDP_JESD216_MAJOR 1
return 0;
}
+/**
+ * spi_nor_parse_microchip_sfdp() - parse the Microchip manufacturer specific
+ * SFDP table.
+ * @nor: pointer to a 'struct spi_nor'.
+ * @param_header: pointer to the SFDP parameter header.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int
+spi_nor_parse_microchip_sfdp(struct spi_nor *nor,
+ const struct sfdp_parameter_header *param_header)
+{
+ size_t size;
+ u32 addr;
+ int ret;
+
+ size = param_header->length * sizeof(u32);
+ addr = SFDP_PARAM_HEADER_PTP(param_header);
+
+ nor->manufacturer_sfdp = devm_kmalloc(nor->dev, size, GFP_KERNEL);
+ if (!nor->manufacturer_sfdp)
+ return -ENOMEM;
+
+ ret = spi_nor_read_sfdp(nor, addr, size, nor->manufacturer_sfdp);
+
+ return ret;
+}
+
/**
* spi_nor_parse_sfdp() - parse the Serial Flash Discoverable Parameters.
* @nor: pointer to a 'struct spi_nor'
dev_info(dev, "non-uniform erase sector maps are not supported yet.\n");
break;
+ case SFDP_SST_ID:
+ err = spi_nor_parse_microchip_sfdp(nor, param_header);
+ break;
+
default:
break;
}
- if (err)
- goto exit;
+ if (err) {
+ dev_warn(dev, "Failed to parse optional parameter table: %04x\n",
+ SFDP_PARAM_HEADER_ID(param_header));
+ /*
+ * Let's not drop all information we extracted so far
+ * if optional table parsers fail. In case of failing,
+ * each optional parser is responsible to roll back to
+ * the previously known spi_nor data.
+ */
+ err = 0;
+ }
}
exit:
projects / oweals / u-boot.git / commitdiff