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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-02-25 GuEe-GUI the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "scsi.blk"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include "../block/blk_dev.h"
struct scsi_sd
{
struct rt_blk_disk parent;
struct rt_scsi_device *sdev;
int sd_id;
rt_bool_t use16;
struct rt_device_blk_geometry geometry;
};
#define raw_to_scsi_sd(raw) rt_container_of(raw, struct scsi_sd, parent)
static struct rt_dm_ida sd_ida = RT_DM_IDA_INIT(CUSTOM);
static struct rt_dm_ida scsi_sd_ida = RT_DM_IDA_INIT(SCSI_SD);
static rt_ssize_t scsi_sd_read(struct rt_blk_disk *disk, rt_off_t sector,
void *buffer, rt_size_t sector_count)
{
rt_err_t err;
struct scsi_sd *ssd = raw_to_scsi_sd(disk);
struct rt_scsi_device *sdev = ssd->sdev;
sector_count &= RT_UINT32_MAX;
if (sector >> 32)
{
err = rt_scsi_read16(sdev, sector, buffer, sector_count);
}
else
{
err = rt_scsi_read10(sdev, sector, buffer, sector_count);
}
return !err ? sector_count : (rt_ssize_t)err;
}
static rt_ssize_t scsi_sd_write(struct rt_blk_disk *disk, rt_off_t sector,
const void *buffer, rt_size_t sector_count)
{
rt_err_t err;
struct scsi_sd *ssd = raw_to_scsi_sd(disk);
struct rt_scsi_device *sdev = ssd->sdev;
sector_count &= RT_UINT32_MAX;
if (sector >> 32)
{
err = rt_scsi_write16(sdev, sector, buffer, sector_count);
}
else
{
err = rt_scsi_write10(sdev, sector, buffer, sector_count);
}
return !err ? sector_count : (rt_ssize_t)err;
}
static rt_err_t scsi_sd_getgeome(struct rt_blk_disk *disk,
struct rt_device_blk_geometry *geometry)
{
struct scsi_sd *ssd = raw_to_scsi_sd(disk);
rt_memcpy(geometry, &ssd->geometry, sizeof(ssd->geometry));
return RT_EOK;
}
static rt_err_t scsi_sd_sync(struct rt_blk_disk *disk)
{
rt_err_t err;
rt_size_t lba_count;
struct scsi_sd *ssd = raw_to_scsi_sd(disk);
struct rt_scsi_device *sdev = ssd->sdev;
lba_count = ssd->geometry.sector_count;
if (ssd->use16)
{
err = rt_scsi_synchronize_cache16(sdev, 0, lba_count);
}
else
{
err = rt_scsi_synchronize_cache10(sdev, 0, lba_count);
}
return err;
}
static rt_err_t scsi_sd_erase(struct rt_blk_disk *disk)
{
rt_err_t err;
rt_size_t lba_count;
struct scsi_sd *ssd = raw_to_scsi_sd(disk);
struct rt_scsi_device *sdev = ssd->sdev;
lba_count = ssd->geometry.sector_count;
if (ssd->use16)
{
err = rt_scsi_write_same16(sdev, 0, lba_count);
}
else
{
err = rt_scsi_write_same10(sdev, 0, lba_count);
}
return err;
}
static rt_err_t scsi_sd_autorefresh(struct rt_blk_disk *disk, rt_bool_t is_auto)
{
rt_err_t err;
int sp;
rt_size_t size;
rt_uint8_t buffer[64];
rt_uint8_t *buffer_data;
rt_bool_t use6 = RT_TRUE;
struct scsi_sd *ssd = raw_to_scsi_sd(disk);
struct rt_scsi_device *sdev = ssd->sdev;
struct rt_scsi_mode_select_data data;
err = rt_scsi_mode_sense6(sdev, 0x08, 8, 0, buffer, sizeof(buffer), &data);
if (err && err != -RT_ENOMEM)
{
use6 = RT_FALSE;
err = rt_scsi_mode_sense10(sdev, 0x08, 8, 0, buffer, sizeof(buffer), &data);
}
if (err)
{
return err;
}
size = rt_min_t(rt_size_t, sizeof(buffer),
data.length - data.header_length - data.block_descriptor_length);
buffer_data = buffer + data.header_length + data.block_descriptor_length;
buffer_data[2] &= ~0x05;
buffer_data[2] |= (!!is_auto) << 2 | (!!is_auto);
sp = buffer_data[0] & 0x80 ? 1 : 0;
buffer_data[0] &= ~0x80;
data.device_specific = 0;
if (use6)
{
err = rt_scsi_mode_select6(sdev, 1, sp, buffer_data, size, &data);
}
else
{
err = rt_scsi_mode_select10(sdev, 1, sp, buffer_data, size, &data);
}
return err;
}
static const struct rt_blk_disk_ops scsi_sd_ops =
{
.read = scsi_sd_read,
.write = scsi_sd_write,
.getgeome = scsi_sd_getgeome,
.sync = scsi_sd_sync,
.erase = scsi_sd_erase,
.autorefresh = scsi_sd_autorefresh,
};
rt_err_t scsi_sd_probe(struct rt_scsi_device *sdev)
{
rt_err_t err;
union
{
struct rt_scsi_read_capacity10_data capacity10;
struct rt_scsi_read_capacity16_data capacity16;
} data;
struct scsi_sd *ssd = rt_calloc(1, sizeof(*ssd));
if (!ssd)
{
return -RT_ENOMEM;
}
if ((ssd->sd_id = rt_dm_ida_alloc(&sd_ida)) < 0)
{
return -RT_EFULL;
}
sdev->priv = ssd;
ssd->sdev = sdev;
ssd->parent.ida = &scsi_sd_ida;
ssd->parent.parallel_io = RT_FALSE;
ssd->parent.ops = &scsi_sd_ops;
ssd->parent.max_partitions = RT_BLK_PARTITION_MAX;
if ((err = rt_scsi_read_capacity10(sdev, &data.capacity10)))
{
goto _fail;
}
if (data.capacity10.last_block == 0xffffffff)
{
if ((err = rt_scsi_read_capacity16(sdev, &data.capacity16)))
{
goto _fail;
}
ssd->use16 = RT_TRUE;
}
ssd->geometry.bytes_per_sector = sdev->block_size;
ssd->geometry.block_size = sdev->block_size;
ssd->geometry.sector_count = sdev->last_block + 1;
rt_dm_dev_set_name(&ssd->parent.parent, "sd%c%c", letter_name(ssd->sd_id));
if ((err = rt_hw_blk_disk_register(&ssd->parent)))
{
goto _fail;
}
return RT_EOK;
_fail:
rt_dm_ida_free(&sd_ida, ssd->sd_id);
rt_free(ssd);
return err;
}
rt_err_t scsi_sd_remove(struct rt_scsi_device *sdev)
{
struct scsi_sd *ssd = sdev->priv;
rt_dm_ida_free(&sd_ida, ssd->sd_id);
return rt_hw_blk_disk_unregister(&ssd->parent);
}
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