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xilinx: board: Add FRU decoder support

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FMC cards are using FRU format for card identification. That's why add
support for this format.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek
2020-08-03 16:14:23 +02:00
parent 4489e0aa9b
commit f149b39ca3
1 changed files with 82 additions and 1 deletions
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83
board/xilinx/common/board.c
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@@ -17,6 +17,8 @@
#include <i2c_eeprom.h>
#include <net.h>
#include "fru.h"
#if defined(CONFIG_ZYNQ_GEM_I2C_MAC_OFFSET)
int zynq_board_read_rom_ethaddr(unsigned char *ethaddr)
{
@@ -65,7 +67,7 @@ struct xilinx_board_description {
static int highest_id = -1;
static struct xilinx_board_description **board_info;
#define XILINX_I2C_DETECTION_BITS 8
#define XILINX_I2C_DETECTION_BITS sizeof(struct fru_common_hdr)
/* Variable which stores pointer to array which stores eeprom content */
struct xilinx_legacy_format {
@@ -160,6 +162,82 @@ static bool xilinx_detect_legacy(u8 *buffer)
return true;
}
static int xilinx_read_eeprom_fru(struct udevice *dev, char *name,
struct xilinx_board_description *desc)
{
int ret, eeprom_size;
u8 *fru_content;
/* FIXME this is shortcut - if eeprom type is wrong it will fail */
eeprom_size = i2c_eeprom_size(dev);
fru_content = calloc(1, eeprom_size);
if (!fru_content)
return -ENOMEM;
debug("%s: I2C EEPROM read pass data at %p\n", __func__,
fru_content);
ret = dm_i2c_read(dev, 0, (uchar *)fru_content,
eeprom_size);
if (ret) {
debug("%s: I2C EEPROM read failed\n", __func__);
free(fru_content);
return ret;
}
printf("Xilinx I2C FRU format at %s:\n", name);
fru_capture((unsigned long)fru_content);
ret = fru_display(0);
if (ret) {
printf("FRU format decoding failed.\n");
return ret;
}
if (desc->header == EEPROM_HEADER_MAGIC) {
debug("Information already filled\n");
return -EINVAL;
}
/* It is clear that FRU was captured and structures were filled */
strncpy(desc->manufacturer, (char *)fru_data.brd.manufacturer_name,
sizeof(desc->manufacturer));
strncpy(desc->name, (char *)fru_data.brd.product_name,
sizeof(desc->name));
strncpy(desc->revision, (char *)fru_data.brd.rev,
sizeof(desc->revision));
strncpy(desc->serial, (char *)fru_data.brd.serial_number,
sizeof(desc->serial));
desc->header = EEPROM_HEADER_MAGIC;
return 0;
}
static bool xilinx_detect_fru(u8 *buffer)
{
u8 checksum = 0;
int i;
checksum = fru_checksum((u8 *)buffer, sizeof(struct fru_common_hdr));
if (checksum) {
debug("%s Common header CRC FAIL\n", __func__);
return false;
}
bool all_zeros = true;
/* Checksum over all zeros is also zero that's why detect this case */
for (i = 0; i < sizeof(struct fru_common_hdr); i++) {
if (buffer[i] != 0)
all_zeros = false;
}
if (all_zeros)
return false;
debug("%s Common header CRC PASS\n", __func__);
return true;
}
static int xilinx_read_eeprom_single(char *name,
struct xilinx_board_description *desc)
{
@@ -184,6 +262,9 @@ static int xilinx_read_eeprom_single(char *name,
debug("%s: i2c memory detected: %s\n", __func__, name);
if (CONFIG_IS_ENABLED(CMD_FRU) && xilinx_detect_fru(buffer))
return xilinx_read_eeprom_fru(dev, name, desc);
if (xilinx_detect_legacy(buffer))
return xilinx_read_eeprom_legacy(dev, name, desc);