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u-boot/board/compulab/common/eeprom.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

527 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2011 CompuLab, Ltd. <www.compulab.co.il>
*
* Authors: Nikita Kiryanov <nikita@compulab.co.il>
* Igor Grinberg <grinberg@compulab.co.il>
*/
#include <common.h>
#include <i2c.h>
#include <eeprom_layout.h>
#include <eeprom_field.h>
#include <asm/setup.h>
#include <linux/kernel.h>
#include "eeprom.h"
#ifndef CONFIG_SYS_I2C_EEPROM_ADDR
# define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
# define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
#endif
#ifndef CONFIG_SYS_I2C_EEPROM_BUS
#define CONFIG_SYS_I2C_EEPROM_BUS 0
#endif
#define EEPROM_LAYOUT_VER_OFFSET 44
#define BOARD_SERIAL_OFFSET 20
#define BOARD_SERIAL_OFFSET_LEGACY 8
#define BOARD_REV_OFFSET 0
#define BOARD_REV_OFFSET_LEGACY 6
#define BOARD_REV_SIZE 2
#define PRODUCT_NAME_OFFSET 128
#define PRODUCT_NAME_SIZE 16
#define MAC_ADDR_OFFSET 4
#define MAC_ADDR_OFFSET_LEGACY 0
#define LAYOUT_INVALID 0
#define LAYOUT_LEGACY 0xff
static int cl_eeprom_bus;
static int cl_eeprom_layout; /* Implicitly LAYOUT_INVALID */
static int cl_eeprom_read(uint offset, uchar *buf, int len)
{
int res;
unsigned int current_i2c_bus = i2c_get_bus_num();
res = i2c_set_bus_num(cl_eeprom_bus);
if (res < 0)
return res;
res = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
i2c_set_bus_num(current_i2c_bus);
return res;
}
static int cl_eeprom_setup(uint eeprom_bus)
{
int res;
/*
* We know the setup was already done when the layout is set to a valid
* value and we're using the same bus as before.
*/
if (cl_eeprom_layout != LAYOUT_INVALID && eeprom_bus == cl_eeprom_bus)
return 0;
cl_eeprom_bus = eeprom_bus;
res = cl_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
(uchar *)&cl_eeprom_layout, 1);
if (res) {
cl_eeprom_layout = LAYOUT_INVALID;
return res;
}
if (cl_eeprom_layout == 0 || cl_eeprom_layout >= 0x20)
cl_eeprom_layout = LAYOUT_LEGACY;
return 0;
}
void get_board_serial(struct tag_serialnr *serialnr)
{
u32 serial[2];
uint offset;
memset(serialnr, 0, sizeof(*serialnr));
if (cl_eeprom_setup(CONFIG_SYS_I2C_EEPROM_BUS))
return;
offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
BOARD_SERIAL_OFFSET : BOARD_SERIAL_OFFSET_LEGACY;
if (cl_eeprom_read(offset, (uchar *)serial, 8))
return;
if (serial[0] != 0xffffffff && serial[1] != 0xffffffff) {
serialnr->low = serial[0];
serialnr->high = serial[1];
}
}
/*
* Routine: cl_eeprom_read_mac_addr
* Description: read mac address and store it in buf.
*/
int cl_eeprom_read_mac_addr(uchar *buf, uint eeprom_bus)
{
uint offset;
int err;
err = cl_eeprom_setup(eeprom_bus);
if (err)
return err;
offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
MAC_ADDR_OFFSET : MAC_ADDR_OFFSET_LEGACY;
return cl_eeprom_read(offset, buf, 6);
}
static u32 board_rev;
/*
* Routine: cl_eeprom_get_board_rev
* Description: read system revision from eeprom
*/
u32 cl_eeprom_get_board_rev(uint eeprom_bus)
{
char str[5]; /* Legacy representation can contain at most 4 digits */
uint offset = BOARD_REV_OFFSET_LEGACY;
if (board_rev)
return board_rev;
if (cl_eeprom_setup(eeprom_bus))
return 0;
if (cl_eeprom_layout != LAYOUT_LEGACY)
offset = BOARD_REV_OFFSET;
if (cl_eeprom_read(offset, (uchar *)&board_rev, BOARD_REV_SIZE))
return 0;
/*
* Convert legacy syntactic representation to semantic
* representation. i.e. for rev 1.00: 0x100 --> 0x64
*/
if (cl_eeprom_layout == LAYOUT_LEGACY) {
sprintf(str, "%x", board_rev);
board_rev = simple_strtoul(str, NULL, 10);
}
return board_rev;
};
/*
* Routine: cl_eeprom_get_board_rev
* Description: read system revision from eeprom
*
* @buf: buffer to store the product name
* @eeprom_bus: i2c bus num of the eeprom
*
* @return: 0 on success, < 0 on failure
*/
int cl_eeprom_get_product_name(uchar *buf, uint eeprom_bus)
{
int err;
if (buf == NULL)
return -EINVAL;
err = cl_eeprom_setup(eeprom_bus);
if (err)
return err;
err = cl_eeprom_read(PRODUCT_NAME_OFFSET, buf, PRODUCT_NAME_SIZE);
if (!err) /* Protect ourselves from invalid data (unterminated str) */
buf[PRODUCT_NAME_SIZE - 1] = '\0';
return err;
}
#ifdef CONFIG_CMD_EEPROM_LAYOUT
/**
* eeprom_field_print_bin_ver() - print a "version field" which contains binary
* data
*
* Treat the field data as simple binary data, and print it formatted as a
* version number (2 digits after decimal point).
* The field size must be exactly 2 bytes.
*
* Sample output:
* Field Name 123.45
*
* @field: an initialized field to print
*/
void eeprom_field_print_bin_ver(const struct eeprom_field *field)
{
if ((field->buf[0] == 0xff) && (field->buf[1] == 0xff)) {
field->buf[0] = 0;
field->buf[1] = 0;
}
printf(PRINT_FIELD_SEGMENT, field->name);
int major = (field->buf[1] << 8 | field->buf[0]) / 100;
int minor = (field->buf[1] << 8 | field->buf[0]) - major * 100;
printf("%d.%02d\n", major, minor);
}
/**
* eeprom_field_update_bin_ver() - update a "version field" which contains
* binary data
*
* This function takes a version string in the form of x.y (x and y are both
* decimal values, y is limited to two digits), translates it to the binary
* form, then writes it to the field. The field size must be exactly 2 bytes.
*
* This function strictly enforces the data syntax, and will not update the
* field if there's any deviation from it. It also protects from overflow.
*
* @field: an initialized field
* @value: a version string
*
* Returns 0 on success, -1 on failure.
*/
int eeprom_field_update_bin_ver(struct eeprom_field *field, char *value)
{
char *endptr;
char *tok = strtok(value, ".");
if (tok == NULL)
return -1;
int num = simple_strtol(tok, &endptr, 0);
if (*endptr != '\0')
return -1;
tok = strtok(NULL, "");
if (tok == NULL)
return -1;
int remainder = simple_strtol(tok, &endptr, 0);
if (*endptr != '\0')
return -1;
num = num * 100 + remainder;
if (num >> 16)
return -1;
field->buf[0] = (unsigned char)num;
field->buf[1] = num >> 8;
return 0;
}
char *months[12] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
/**
* eeprom_field_print_date() - print a field which contains date data
*
* Treat the field data as simple binary data, and print it formatted as a date.
* Sample output:
* Field Name 07/Feb/2014
* Field Name 56/BAD/9999
*
* @field: an initialized field to print
*/
void eeprom_field_print_date(const struct eeprom_field *field)
{
printf(PRINT_FIELD_SEGMENT, field->name);
printf("%02d/", field->buf[0]);
if (field->buf[1] >= 1 && field->buf[1] <= 12)
printf("%s", months[field->buf[1] - 1]);
else
printf("BAD");
printf("/%d\n", field->buf[3] << 8 | field->buf[2]);
}
static int validate_date(unsigned char day, unsigned char month,
unsigned int year)
{
int days_in_february;
switch (month) {
case 0:
case 2:
case 4:
case 6:
case 7:
case 9:
case 11:
if (day > 31)
return -1;
break;
case 3:
case 5:
case 8:
case 10:
if (day > 30)
return -1;
break;
case 1:
days_in_february = 28;
if (year % 4 == 0) {
if (year % 100 != 0)
days_in_february = 29;
else if (year % 400 == 0)
days_in_february = 29;
}
if (day > days_in_february)
return -1;
break;
default:
return -1;
}
return 0;
}
/**
* eeprom_field_update_date() - update a date field which contains binary data
*
* This function takes a date string in the form of x/Mon/y (x and y are both
* decimal values), translates it to the binary representation, then writes it
* to the field.
*
* This function strictly enforces the data syntax, and will not update the
* field if there's any deviation from it. It also protects from overflow in the
* year value, and checks the validity of the date.
*
* @field: an initialized field
* @value: a date string
*
* Returns 0 on success, -1 on failure.
*/
int eeprom_field_update_date(struct eeprom_field *field, char *value)
{
char *endptr;
char *tok1 = strtok(value, "/");
char *tok2 = strtok(NULL, "/");
char *tok3 = strtok(NULL, "/");
if (tok1 == NULL || tok2 == NULL || tok3 == NULL) {
printf("%s: syntax error\n", field->name);
return -1;
}
unsigned char day = (unsigned char)simple_strtol(tok1, &endptr, 0);
if (*endptr != '\0' || day == 0) {
printf("%s: invalid day\n", field->name);
return -1;
}
unsigned char month;
for (month = 1; month <= 12; month++)
if (!strcmp(tok2, months[month - 1]))
break;
unsigned int year = simple_strtol(tok3, &endptr, 0);
if (*endptr != '\0') {
printf("%s: invalid year\n", field->name);
return -1;
}
if (validate_date(day, month - 1, year)) {
printf("%s: invalid date\n", field->name);
return -1;
}
if (year >> 16) {
printf("%s: year overflow\n", field->name);
return -1;
}
field->buf[0] = day;
field->buf[1] = month;
field->buf[2] = (unsigned char)year;
field->buf[3] = (unsigned char)(year >> 8);
return 0;
}
#define LAYOUT_VERSION_LEGACY 1
#define LAYOUT_VERSION_VER1 2
#define LAYOUT_VERSION_VER2 3
#define LAYOUT_VERSION_VER3 4
extern struct eeprom_field layout_unknown[1];
#define DEFINE_PRINT_UPDATE(x) eeprom_field_print_##x, eeprom_field_update_##x
#ifdef CONFIG_CM_T3X
struct eeprom_field layout_legacy[5] = {
{ "MAC address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "Board Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin) },
{ "Serial Number", 8, NULL, DEFINE_PRINT_UPDATE(bin) },
{ "Board Configuration", 64, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ RESERVED_FIELDS, 176, NULL, eeprom_field_print_reserved,
eeprom_field_update_ascii },
};
#else
#define layout_legacy layout_unknown
#endif
#if defined(CONFIG_CM_T3X) || defined(CONFIG_CM_T3517)
struct eeprom_field layout_v1[12] = {
{ "Major Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin_ver) },
{ "Minor Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin_ver) },
{ "1st MAC Address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "2nd MAC Address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "Production Date", 4, NULL, DEFINE_PRINT_UPDATE(date) },
{ "Serial Number", 12, NULL, DEFINE_PRINT_UPDATE(bin_rev) },
{ RESERVED_FIELDS, 96, NULL, DEFINE_PRINT_UPDATE(reserved) },
{ "Product Name", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #1", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #2", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #3", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ RESERVED_FIELDS, 64, NULL, eeprom_field_print_reserved,
eeprom_field_update_ascii },
};
#else
#define layout_v1 layout_unknown
#endif
struct eeprom_field layout_v2[15] = {
{ "Major Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin_ver) },
{ "Minor Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin_ver) },
{ "1st MAC Address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "2nd MAC Address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "Production Date", 4, NULL, DEFINE_PRINT_UPDATE(date) },
{ "Serial Number", 12, NULL, DEFINE_PRINT_UPDATE(bin_rev) },
{ "3rd MAC Address (WIFI)", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "4th MAC Address (Bluetooth)", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "Layout Version", 1, NULL, DEFINE_PRINT_UPDATE(bin) },
{ RESERVED_FIELDS, 83, NULL, DEFINE_PRINT_UPDATE(reserved) },
{ "Product Name", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #1", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #2", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #3", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ RESERVED_FIELDS, 64, NULL, eeprom_field_print_reserved,
eeprom_field_update_ascii },
};
struct eeprom_field layout_v3[16] = {
{ "Major Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin_ver) },
{ "Minor Revision", 2, NULL, DEFINE_PRINT_UPDATE(bin_ver) },
{ "1st MAC Address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "2nd MAC Address", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "Production Date", 4, NULL, DEFINE_PRINT_UPDATE(date) },
{ "Serial Number", 12, NULL, DEFINE_PRINT_UPDATE(bin_rev) },
{ "3rd MAC Address (WIFI)", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "4th MAC Address (Bluetooth)", 6, NULL, DEFINE_PRINT_UPDATE(mac) },
{ "Layout Version", 1, NULL, DEFINE_PRINT_UPDATE(bin) },
{ "CompuLab EEPROM ID", 3, NULL, DEFINE_PRINT_UPDATE(bin) },
{ RESERVED_FIELDS, 80, NULL, DEFINE_PRINT_UPDATE(reserved) },
{ "Product Name", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #1", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #2", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ "Product Options #3", 16, NULL, DEFINE_PRINT_UPDATE(ascii) },
{ RESERVED_FIELDS, 64, NULL, eeprom_field_print_reserved,
eeprom_field_update_ascii },
};
void eeprom_layout_assign(struct eeprom_layout *layout, int layout_version)
{
switch (layout->layout_version) {
case LAYOUT_VERSION_LEGACY:
layout->fields = layout_legacy;
layout->num_of_fields = ARRAY_SIZE(layout_legacy);
break;
case LAYOUT_VERSION_VER1:
layout->fields = layout_v1;
layout->num_of_fields = ARRAY_SIZE(layout_v1);
break;
case LAYOUT_VERSION_VER2:
layout->fields = layout_v2;
layout->num_of_fields = ARRAY_SIZE(layout_v2);
break;
case LAYOUT_VERSION_VER3:
layout->fields = layout_v3;
layout->num_of_fields = ARRAY_SIZE(layout_v3);
break;
default:
__eeprom_layout_assign(layout, layout_version);
}
}
int eeprom_parse_layout_version(char *str)
{
if (!strcmp(str, "legacy"))
return LAYOUT_VERSION_LEGACY;
else if (!strcmp(str, "v1"))
return LAYOUT_VERSION_VER1;
else if (!strcmp(str, "v2"))
return LAYOUT_VERSION_VER2;
else if (!strcmp(str, "v3"))
return LAYOUT_VERSION_VER3;
else
return LAYOUT_VERSION_UNRECOGNIZED;
}
int eeprom_layout_detect(unsigned char *data)
{
switch (data[EEPROM_LAYOUT_VER_OFFSET]) {
case 0xff:
case 0:
return LAYOUT_VERSION_VER1;
case 2:
return LAYOUT_VERSION_VER2;
case 3:
return LAYOUT_VERSION_VER3;
}
if (data[EEPROM_LAYOUT_VER_OFFSET] >= 0x20)
return LAYOUT_VERSION_LEGACY;
return LAYOUT_VERSION_UNRECOGNIZED;
}
#endif
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