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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
2018-09-10 heyuanjie87 first version
*/
#include <drivers/mtd.h>
static rt_mtd_t* mtd_part_alloc(rt_mtd_t *master, const struct mtd_part *part)
{
rt_mtd_t *slave;
slave = rt_malloc(sizeof(rt_mtd_t));
if (slave == RT_NULL)
goto out;
slave->master = master;
*slave = *master;
slave->size = part->size;
slave->offset = part->offset;
out:
return slave;
}
rt_mtd_t* rt_mtd_get(const char *name)
{
rt_mtd_t *mtd;
mtd = (rt_mtd_t *)rt_device_find(name);
if (mtd == RT_NULL)
return RT_NULL;
if (mtd->parent.type != RT_Device_Class_MTD)
return RT_NULL;
return mtd;
}
/*
* Register MTD driver
*
* @parts partion description
* @np number of partitions
* @return number of unregistered partitions
*
*/
int rt_mtd_register(rt_mtd_t *master, const struct mtd_part *parts, int np)
{
int ret;
rt_mtd_t *slave;
master->master = master;
master->parent.type = RT_Device_Class_MTD;
if (np > 0)
{
master->offset = parts->offset;
master->size = parts->size;
ret = rt_device_register((rt_device_t)master, parts->name, 0);
if (ret != 0)
goto _out;
np --;
parts ++;
}
while (np > 0)
{
slave = mtd_part_alloc(master, parts);
if (!slave)
break;
ret = rt_device_register((rt_device_t)slave, parts->name, 0);
if (ret)
break;
parts ++;
np --;
}
_out:
return np;
}
int rt_mtd_block_erase(rt_mtd_t *mtd, uint32_t block)
{
uint32_t total_blks;
loff_t addr;
total_blks = mtd->size/mtd->block_size;
if (block >= total_blks)
return -EINVAL;
addr = mtd->offset + mtd->block_size * block;
return mtd->ops->erase(mtd->master, addr, mtd->block_size);
}
int rt_mtd_block_isbad(rt_mtd_t *mtd, uint32_t block)
{
uint32_t total_blks, offset_blk;
if (!mtd->ops->isbad)
return 0;
total_blks = mtd->size / mtd->block_size;
if (block >= total_blks)
return -EINVAL;
offset_blk = mtd->offset / mtd->block_size;
return mtd->ops->isbad(mtd->master, block + offset_blk);
}
int rt_mtd_block_markbad(rt_mtd_t *mtd, uint32_t block)
{
uint32_t total_blks, offset_blk;
if (!mtd->ops->markbad)
return -EOPNOTSUPP;
total_blks = mtd->size / mtd->block_size;
if (block >= total_blks)
return -EINVAL;
offset_blk = mtd->offset / mtd->block_size;
return mtd->ops->markbad(mtd->master, block + offset_blk);
}
int rt_mtd_erase(rt_mtd_t *mtd, loff_t addr, size_t size)
{
if (addr > mtd->size || (addr + size) > mtd->size)
return -EINVAL;
addr += mtd->offset;
return mtd->ops->erase(mtd->master, addr, size);
}
/*
* Read data only
*
* @from offset to read from
* @return success size or error code
*/
int rt_mtd_read(rt_mtd_t *mtd, loff_t from, uint8_t *buf, size_t len)
{
int ret;
struct mtd_io_desc desc = {0};
if (from < 0 || from >= (loff_t)mtd->size || len > mtd->size - from)
return -EINVAL;
if (!len)
return 0;
desc.datbuf = buf;
desc.datlen = len;
ret = mtd->ops->read(mtd->master, from + mtd->offset, &desc);
if (ret)
return ret;
return desc.datretlen;
}
/**
* Write data only
*
* @to offset to write from
* @return success size or error code
*/
int rt_mtd_write(rt_mtd_t *mtd, loff_t to, const uint8_t *buf, size_t len)
{
int ret;
struct mtd_io_desc desc = {0};
if (to < 0 || to >= (loff_t)mtd->size || len > mtd->size - to)
return -EINVAL;
if (!mtd->ops->write)
return -EROFS;
if (!len)
return 0;
desc.datbuf = (uint8_t*)buf;
desc.datlen = len;
ret = mtd->ops->write(mtd->master, to + mtd->offset, &desc);
if (ret)
return ret;
return desc.datretlen;
}
/**
* Read data and/or out-of-band
*
* @from offset to read from
* @desc sector operation description structure
* @return error code, 0 success
*/
int rt_mtd_read_oob(rt_mtd_t *mtd, loff_t from, struct mtd_io_desc *desc)
{
desc->datretlen = 0;
desc->oobretlen = 0;
if (from < 0 || from >= (loff_t)mtd->size)
return -EINVAL;
if (desc->datbuf && (desc->datlen > (mtd->size - from)))
return -EINVAL;
return mtd->ops->read(mtd->master, from + mtd->offset, desc);
}
/**
* Write data and/or out-of-band
*
* @to offset to read from
* @desc sector operation description structure
* @return error code, 0 success
*/
int rt_mtd_write_oob(rt_mtd_t *mtd, loff_t to, struct mtd_io_desc *desc)
{
desc->datretlen = 0;
desc->oobretlen = 0;
if (to < 0 || to >= (loff_t)mtd->size)
return -EINVAL;
if (desc->datbuf && (desc->datlen >(mtd->size - to)))
return -EINVAL;
return mtd->ops->write(mtd->master, to + mtd->offset, desc);
}
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