mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-08-15 08:57:02 +02:00
b114abb609
The raw NAND framework supports SLC NAND devices.
It introduces a new high level interface (io_mtd) that
defines operations a driver can register to the NAND framework.
This interface will fill in the io_mtd device specification:
- device_size
- erase_size
that could be used by the io_storage interface.
NAND core source file integrates the standard read loop that
performs NAND device read operations using a skip bad block strategy.
A platform buffer must be defined in case of unaligned
data. This buffer must fit to the maximum device page size
defined by PLATFORM_MTD_MAX_PAGE_SIZE.
The raw_nand.c source file embeds the specific NAND operations
to read data.
The read command is a raw page read without any ECC correction.
This can be overridden by a low level driver.
No generic support for write or erase command or software
ECC correction.
NAND ONFI detection is available and can be enabled using
NAND_ONFI_DETECT=1.
For non-ONFI NAND management, platform can define required
information.
Change-Id: Id80e9864456cf47f02b74938cf25d99261da8e82
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
|
|
* Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#ifndef IO_MTD_H
|
|
#define IO_MTD_H
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
|
|
#include <drivers/io/io_storage.h>
|
|
|
|
/* MTD devices ops */
|
|
typedef struct io_mtd_ops {
|
|
/*
|
|
* Initialize MTD framework and retrieve device information.
|
|
*
|
|
* @size: [out] MTD device size in bytes.
|
|
* @erase_size: [out] MTD erase size in bytes.
|
|
* Return 0 on success, a negative error code otherwise.
|
|
*/
|
|
int (*init)(unsigned long long *size, unsigned int *erase_size);
|
|
|
|
/*
|
|
* Execute a read memory operation.
|
|
*
|
|
* @offset: Offset in bytes to start read operation.
|
|
* @buffer: [out] Buffer to store read data.
|
|
* @length: Required length to be read in bytes.
|
|
* @out_length: [out] Length read in bytes.
|
|
* Return 0 on success, a negative error code otherwise.
|
|
*/
|
|
int (*read)(unsigned int offset, uintptr_t buffer, size_t length,
|
|
size_t *out_length);
|
|
|
|
/*
|
|
* Execute a write memory operation.
|
|
*
|
|
* @offset: Offset in bytes to start write operation.
|
|
* @buffer: Buffer to be written in device.
|
|
* @length: Required length to be written in bytes.
|
|
* Return 0 on success, a negative error code otherwise.
|
|
*/
|
|
int (*write)(unsigned int offset, uintptr_t buffer, size_t length);
|
|
} io_mtd_ops_t;
|
|
|
|
typedef struct io_mtd_dev_spec {
|
|
unsigned long long device_size;
|
|
unsigned int erase_size;
|
|
io_mtd_ops_t ops;
|
|
} io_mtd_dev_spec_t;
|
|
|
|
struct io_dev_connector;
|
|
|
|
int register_io_dev_mtd(const struct io_dev_connector **dev_con);
|
|
|
|
#endif /* IO_MTD_H */
|