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/*
* (C) Copyright 2009-2016 CompuLab, Ltd.
*
* Authors: Nikita Kiryanov <nikita@compulab.co.il>
* Igor Grinberg <grinberg@compulab.co.il>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/kernel.h>
#include <eeprom_layout.h>
#include <eeprom_field.h>
#define NO_LAYOUT_FIELDS "Unknown layout. Dumping raw data\n"
struct eeprom_field layout_unknown[1] = {
{ NO_LAYOUT_FIELDS, 256, NULL, eeprom_field_print_bin,
eeprom_field_update_bin },
};
/*
* eeprom_layout_detect() - detect layout based on the contents of the data.
* @data: Pointer to the data to be analyzed.
*
* Returns: the detected layout version.
*/
__weak int eeprom_layout_detect(unsigned char *data)
{
return LAYOUT_VERSION_UNRECOGNIZED;
}
/*
* __eeprom_layout_assign() - set the layout fields
* @layout: A pointer to an existing struct layout.
* @layout_version: The version number of the desired layout
*/
__weak void __eeprom_layout_assign(struct eeprom_layout *layout,
int layout_version)
{
layout->fields = layout_unknown;
layout->num_of_fields = ARRAY_SIZE(layout_unknown);
}
void eeprom_layout_assign(struct eeprom_layout *layout, int layout_version) \
__attribute__((weak, alias("__eeprom_layout_assign")));
/*
* eeprom_layout_print() - print the layout and the data which is assigned to it
* @layout: A pointer to an existing struct layout.
*/
static void eeprom_layout_print(const struct eeprom_layout *layout)
{
int i;
struct eeprom_field *fields = layout->fields;
for (i = 0; i < layout->num_of_fields; i++)
fields[i].print(&fields[i]);
}
/*
* eeprom_layout_update_field() - update a single field in the layout data.
* @layout: A pointer to an existing struct layout.
* @field_name: The name of the field to update.
* @new_data: The new field data (a string. Format depends on the field)
*
* Returns: 0 on success, negative error value on failure.
*/
static int eeprom_layout_update_field(struct eeprom_layout *layout,
char *field_name, char *new_data)
{
int i, err;
struct eeprom_field *fields = layout->fields;
if (new_data == NULL)
return 0;
if (field_name == NULL)
return -1;
for (i = 0; i < layout->num_of_fields; i++) {
if (fields[i].name == RESERVED_FIELDS ||
strcmp(fields[i].name, field_name))
continue;
err = fields[i].update(&fields[i], new_data);
if (err)
printf("Invalid data for field %s\n", field_name);
return err;
}
printf("No such field '%s'\n", field_name);
return -1;
}
/*
* eeprom_layout_setup() - setup layout struct with the layout data and
* metadata as dictated by layout_version
* @layout: A pointer to an existing struct layout.
* @buf: A buffer initialized with the eeprom data.
* @buf_size: Size of buf in bytes.
* @layout version: The version number of the layout.
*/
void eeprom_layout_setup(struct eeprom_layout *layout, unsigned char *buf,
unsigned int buf_size, int layout_version)
{
int i;
if (layout_version == LAYOUT_VERSION_AUTODETECT)
layout->layout_version = eeprom_layout_detect(buf);
else
layout->layout_version = layout_version;
eeprom_layout_assign(layout, layout_version);
layout->data = buf;
for (i = 0; i < layout->num_of_fields; i++) {
layout->fields[i].buf = buf;
buf += layout->fields[i].size;
}
layout->data_size = buf_size;
layout->print = eeprom_layout_print;
layout->update = eeprom_layout_update_field;
}
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