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/*
* Copyright (c) 2025, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/drivers/disk.h>
#include "usbh_core.h"
#include "usbh_msc.h"
#ifdef CONFIG_DCACHE
#ifndef CONFIG_USB_DCACHE_ENABLE
#error CONFIG_USB_DCACHE_ENABLE must be enabled to use msc disk
#endif
#endif
struct usbh_msc *active_msc_class;
static int disk_msc_access_init(struct disk_info *disk)
{
active_msc_class = (struct usbh_msc *)usbh_find_class_instance("/dev/sda");
if (active_msc_class == NULL) {
printf("do not find /dev/sda\r\n");
return -ENODEV;
}
if (usbh_msc_scsi_init(active_msc_class) < 0) {
return -EIO;
}
return 0;
}
static int disk_msc_access_status(struct disk_info *disk)
{
return DISK_STATUS_OK;
}
static int disk_msc_access_read(struct disk_info *disk, uint8_t *buff,
uint32_t sector, uint32_t count)
{
int ret;
uint8_t *align_buf;
align_buf = (uint8_t *)buff;
#ifdef CONFIG_DCACHE
if ((uint32_t)buff & (CONFIG_USB_ALIGN_SIZE - 1)) {
align_buf = (uint8_t *)k_aligned_alloc(CONFIG_USB_ALIGN_SIZE, count * active_msc_class->blocksize);
if (!align_buf) {
printf("msc get align buf failed\r\n");
return -ENOMEM;
}
}
#endif
if (usbh_msc_scsi_read10(active_msc_class, sector, align_buf, count) < 0) {
ret = -EIO;
} else {
ret = 0;
}
#ifdef CONFIG_DCACHE
if ((uint32_t)buff & (CONFIG_USB_ALIGN_SIZE - 1)) {
usb_memcpy(buff, align_buf, count * active_msc_class->blocksize);
k_free(align_buf);
}
#endif
return ret;
}
static int disk_msc_access_write(struct disk_info *disk, const uint8_t *buff,
uint32_t sector, uint32_t count)
{
int ret;
uint8_t *align_buf;
align_buf = (uint8_t *)buff;
#ifdef CONFIG_DCACHE
if ((uint32_t)buff & (CONFIG_USB_ALIGN_SIZE - 1)) {
align_buf = (uint8_t *)k_aligned_alloc(CONFIG_USB_ALIGN_SIZE, count * active_msc_class->blocksize);
if (!align_buf) {
printf("msc get align buf failed\r\n");
return -ENOMEM;
}
usb_memcpy(align_buf, buff, count * active_msc_class->blocksize);
}
#endif
if (usbh_msc_scsi_write10(active_msc_class, sector, align_buf, count) < 0) {
ret = -EIO;
} else {
ret = 0;
}
#ifdef CONFIG_DCACHE
if ((uint32_t)buff & (CONFIG_USB_ALIGN_SIZE - 1)) {
k_free(align_buf);
}
#endif
return ret;
}
static int disk_msc_access_ioctl(struct disk_info *disk, uint8_t cmd, void *buff)
{
switch (cmd) {
case DISK_IOCTL_CTRL_SYNC:
break;
case DISK_IOCTL_GET_SECTOR_COUNT:
*(uint32_t *)buff = active_msc_class->blocknum;
break;
case DISK_IOCTL_GET_SECTOR_SIZE:
*(uint32_t *)buff = active_msc_class->blocksize;
break;
case DISK_IOCTL_GET_ERASE_BLOCK_SZ:
*(uint32_t *)buff = 1U;
break;
case DISK_IOCTL_CTRL_INIT:
return disk_msc_access_init(disk);
case DISK_IOCTL_CTRL_DEINIT:
break;
default:
return -EINVAL;
}
return 0;
}
static const struct disk_operations msc_disk_ops = {
.init = disk_msc_access_init,
.status = disk_msc_access_status,
.read = disk_msc_access_read,
.write = disk_msc_access_write,
.ioctl = disk_msc_access_ioctl,
};
static struct disk_info usbh_msc_disk = {
.name = "USB",
.ops = &msc_disk_ops,
};
void usbh_msc_run(struct usbh_msc *msc_class)
{
disk_access_register(&usbh_msc_disk);
}
void usbh_msc_stop(struct usbh_msc *msc_class)
{
disk_access_unregister(&usbh_msc_disk);
}
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