123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * (C) Copyright 2021
- * Köry Maincent, Bootlin, <kory.maincent@bootlin.com>
- */
- #include <common.h>
- #include <malloc.h>
- #include <i2c.h>
- #include <extension_board.h>
- #include "cape_detect.h"
- static void sanitize_field(char *text, size_t size)
- {
- char *c = NULL;
- for (c = text; c < text + (int)size; c++) {
- if (*c == 0xFF)
- *c = 0;
- }
- }
- int extension_board_scan(struct list_head *extension_list)
- {
- struct extension *cape;
- struct am335x_cape_eeprom_id eeprom_header;
- int num_capes = 0;
- int ret, i;
- struct udevice *dev;
- unsigned char addr;
- char process_cape_part_number[17] = {'0'};
- char process_cape_version[5] = {'0'};
- uint8_t cursor = 0;
- for (addr = CAPE_EEPROM_FIRST_ADDR; addr <= CAPE_EEPROM_LAST_ADDR; addr++) {
- ret = i2c_get_chip_for_busnum(CONFIG_CAPE_EEPROM_BUS_NUM, addr, 1, &dev);
- if (ret)
- continue;
- /* Move the read cursor to the beginning of the EEPROM */
- dm_i2c_write(dev, 0, &cursor, 1);
- ret = dm_i2c_read(dev, 0, (uint8_t *)&eeprom_header,
- sizeof(struct am335x_cape_eeprom_id));
- if (ret) {
- printf("Cannot read i2c EEPROM\n");
- continue;
- }
- if (eeprom_header.header != CAPE_MAGIC)
- continue;
- sanitize_field(eeprom_header.board_name, sizeof(eeprom_header.board_name));
- sanitize_field(eeprom_header.version, sizeof(eeprom_header.version));
- sanitize_field(eeprom_header.manufacturer, sizeof(eeprom_header.manufacturer));
- sanitize_field(eeprom_header.part_number, sizeof(eeprom_header.part_number));
- /* Process cape part_number */
- memset(process_cape_part_number, 0, sizeof(process_cape_part_number));
- strncpy(process_cape_part_number, eeprom_header.part_number, 16);
- /* Some capes end with '.' */
- for (i = 15; i >= 0; i--) {
- if (process_cape_part_number[i] == '.')
- process_cape_part_number[i] = '\0';
- else
- break;
- }
- /* Process cape version */
- memset(process_cape_version, 0, sizeof(process_cape_version));
- strncpy(process_cape_version, eeprom_header.version, 4);
- for (i = 0; i < 4; i++) {
- if (process_cape_version[i] == 0)
- process_cape_version[i] = '0';
- }
- printf("BeagleBone Cape: %s (0x%x)\n", eeprom_header.board_name, addr);
- cape = calloc(1, sizeof(struct extension));
- if (!cape) {
- printf("Error in memory allocation\n");
- return num_capes;
- }
- snprintf(cape->overlay, sizeof(cape->overlay), "%s-%s.dtbo",
- process_cape_part_number, process_cape_version);
- strncpy(cape->name, eeprom_header.board_name, 32);
- strncpy(cape->version, process_cape_version, 4);
- strncpy(cape->owner, eeprom_header.manufacturer, 16);
- list_add_tail(&cape->list, extension_list);
- num_capes++;
- }
- return num_capes;
- }
|