blob: bb420876333435f68248fafabbec454fb773b2de [file] [log] [blame]
/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
Copyright (c) 2014-2015 Datalight, Inc.
All Rights Reserved Worldwide.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; use version 2 of the License.
This program is distributed in the hope that it will be useful,
but "AS-IS," WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/* Businesses and individuals that for commercial or other reasons cannot
comply with the terms of the GPLv2 license may obtain a commercial license
before incorporating Reliance Edge into proprietary software for
distribution in any form. Visit http://www.datalight.com/reliance-edge for
more information.
*/
/** @file
@brief Implements block device I/O.
*/
#include <FreeRTOS.h>
#include <redfs.h>
#include <redvolume.h>
#include <redosdeviations.h>
/*------------------------------------------------------------------------------
Porting Note:
Several example implementations of this module for FreeRTOS are available.
If you are lucky, you can use one of these implementations; otherwise, these
can serve as examples of how to implement this service.
------------------------------------------------------------------------------*/
/** @brief The F_DRIVER example implementation.
This implementation is designed to reuse an existing block device driver
that was written for FreeRTOS+FAT SL. If you have such a driver, with
little work it can be "dropped in" and used for Reliance Edge. The only
customization required is that gpfnRedOsBDevInit needs to be defined and
pointed at the F_DRIVERINIT function. This can be done in this module or in
another C file.
The disadantage of using the FreeRTOS F_DRIVER functions is that they only
support single-sector reads and writes. Reliance Edge will issue
multi-sector requests, and servicing these one sector at a time will
significantly slow down the file system.
*/
#define BDEV_F_DRIVER (0U)
/** @brief The FatFs example implementation.
This implementation is designed to reuse an existing block device driver
that was written for FatFs. If you have such a driver, it can be linked
in and used immediately. The FatFs `diskio.h` header must be in the include
directory path.
*/
#define BDEV_FATFS (1U)
/** @brief The Atmel Studio Framework SD/MMC driver example implementation.
This implementation uses a modified version of the open source SD/MMC driver
included in the Atmel Studio Framework (ASF) and will work as-is for many
varieties of Atmel hardware. This example assumes relatively minor
modifications to the ASF SD/MMC driver to make it support multi-sector read
and write requests, which greatly improves performance. The modified driver
is distributed with Reliance Edge and is included in FreeRTOS Atmel projects
(such as in projects/freertos/atmel/sam4e-ek/src/ASF).
This example can easily be modified to work with an unmodified version of
the ASF SD/MMC driver. Simply replace sd_mmc_mem_2_ram_multi() and
sd_mmc_ram_2_mem_multi() with sd_mmc_mem_2_ram() and sd_mmc_ram_2_mem()
respectively, and add a for loop to loop over each sector in the request.
However, as described in the manual, there are considerable performance
advantages to issuing real multi-sector requests, so using the modified
driver is recommended.
*/
#define BDEV_ATMEL_SDMMC (2U)
/** @brief The ST Microelectronics STM32 SDIO driver example implementation.
This implementation accesses the microSD card through the BSP utilities
provided as part of the STM32Cube package, used with the STM32 HAL drivers.
The STM3240G-EVAL and STM32F746NG-Discovery boards are currently supported.
*/
#define BDEV_STM32_SDIO (3U)
/** @brief The RAM disk example implementation.
This implementation uses a RAM disk. It will allow you to compile and test
Reliance Edge even if your storage driver is not yet ready. On typical
target hardware, the amount of spare RAM will be limited so generally only
very small disks will be available.
*/
#define BDEV_RAM_DISK (4U)
/** @brief Pick which example implementation is compiled.
Must be one of:
- #BDEV_F_DRIVER
- #BDEV_FATFS
- #BDEV_ATMEL_SDMMC
- #BDEV_STM32_SDIO
- #BDEV_RAM_DISK
*/
#define BDEV_EXAMPLE_IMPLEMENTATION BDEV_RAM_DISK
static REDSTATUS DiskOpen(uint8_t bVolNum, BDEVOPENMODE mode);
static REDSTATUS DiskClose(uint8_t bVolNum);
static REDSTATUS DiskRead(uint8_t bVolNum, uint64_t ullSectorStart, uint32_t ulSectorCount, void *pBuffer);
#if REDCONF_READ_ONLY == 0
static REDSTATUS DiskWrite(uint8_t bVolNum, uint64_t ullSectorStart, uint32_t ulSectorCount, const void *pBuffer);
static REDSTATUS DiskFlush(uint8_t bVolNum);
#endif
/** @brief Initialize a block device.
This function is called when the file system needs access to a block
device.
Upon successful return, the block device should be fully initialized and
ready to service read/write/flush/close requests.
The behavior of calling this function on a block device which is already
open is undefined.
@param bVolNum The volume number of the volume whose block device is being
initialized.
@param mode The open mode, indicating the type of access required.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EINVAL @p bVolNum is an invalid volume number.
@retval -RED_EIO A disk I/O error occurred.
*/
REDSTATUS RedOsBDevOpen(
uint8_t bVolNum,
BDEVOPENMODE mode)
{
REDSTATUS ret;
if(bVolNum >= REDCONF_VOLUME_COUNT)
{
ret = -RED_EINVAL;
}
else
{
ret = DiskOpen(bVolNum, mode);
}
return ret;
}
/** @brief Uninitialize a block device.
This function is called when the file system no longer needs access to a
block device. If any resource were allocated by RedOsBDevOpen() to service
block device requests, they should be freed at this time.
Upon successful return, the block device must be in such a state that it
can be opened again.
The behavior of calling this function on a block device which is already
closed is undefined.
@param bVolNum The volume number of the volume whose block device is being
uninitialized.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EINVAL @p bVolNum is an invalid volume number.
*/
REDSTATUS RedOsBDevClose(
uint8_t bVolNum)
{
REDSTATUS ret;
if(bVolNum >= REDCONF_VOLUME_COUNT)
{
ret = -RED_EINVAL;
}
else
{
ret = DiskClose(bVolNum);
}
return ret;
}
/** @brief Read sectors from a physical block device.
The behavior of calling this function is undefined if the block device is
closed or if it was opened with ::BDEV_O_WRONLY.
@param bVolNum The volume number of the volume whose block device
is being read from.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to read.
@param pBuffer The buffer into which to read the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EINVAL @p bVolNum is an invalid volume number, @p pBuffer is
`NULL`, or @p ullStartSector and/or @p ulSectorCount
refer to an invalid range of sectors.
@retval -RED_EIO A disk I/O error occurred.
*/
REDSTATUS RedOsBDevRead(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
void *pBuffer)
{
REDSTATUS ret = 0;
if( (bVolNum >= REDCONF_VOLUME_COUNT)
|| (ullSectorStart >= gaRedVolConf[bVolNum].ullSectorCount)
|| ((gaRedVolConf[bVolNum].ullSectorCount - ullSectorStart) < ulSectorCount)
|| (pBuffer == NULL))
{
ret = -RED_EINVAL;
}
else
{
ret = DiskRead(bVolNum, ullSectorStart, ulSectorCount, pBuffer);
}
return ret;
}
#if REDCONF_READ_ONLY == 0
/** @brief Write sectors to a physical block device.
The behavior of calling this function is undefined if the block device is
closed or if it was opened with ::BDEV_O_RDONLY.
@param bVolNum The volume number of the volume whose block device
is being written to.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to write.
@param pBuffer The buffer from which to write the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EINVAL @p bVolNum is an invalid volume number, @p pBuffer is
`NULL`, or @p ullStartSector and/or @p ulSectorCount
refer to an invalid range of sectors.
@retval -RED_EIO A disk I/O error occurred.
*/
REDSTATUS RedOsBDevWrite(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
const void *pBuffer)
{
REDSTATUS ret = 0;
if( (bVolNum >= REDCONF_VOLUME_COUNT)
|| (ullSectorStart >= gaRedVolConf[bVolNum].ullSectorCount)
|| ((gaRedVolConf[bVolNum].ullSectorCount - ullSectorStart) < ulSectorCount)
|| (pBuffer == NULL))
{
ret = -RED_EINVAL;
}
else
{
ret = DiskWrite(bVolNum, ullSectorStart, ulSectorCount, pBuffer);
}
return ret;
}
/** @brief Flush any caches beneath the file system.
This function must synchronously flush all software and hardware caches
beneath the file system, ensuring that all sectors written previously are
committed to permanent storage.
If the environment has no caching beneath the file system, the
implementation of this function can do nothing and return success.
The behavior of calling this function is undefined if the block device is
closed or if it was opened with ::BDEV_O_RDONLY.
@param bVolNum The volume number of the volume whose block device is being
flushed.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EINVAL @p bVolNum is an invalid volume number.
@retval -RED_EIO A disk I/O error occurred.
*/
REDSTATUS RedOsBDevFlush(
uint8_t bVolNum)
{
REDSTATUS ret;
if(bVolNum >= REDCONF_VOLUME_COUNT)
{
ret = -RED_EINVAL;
}
else
{
ret = DiskFlush(bVolNum);
}
return ret;
}
#endif /* REDCONF_READ_ONLY == 0 */
#if BDEV_EXAMPLE_IMPLEMENTATION == BDEV_F_DRIVER
#include <api_mdriver.h>
/* This must be declared and initialized elsewere (e.g., in project code) to
point at the initialization function for the F_DRIVER block device.
*/
extern const F_DRIVERINIT gpfnRedOsBDevInit;
static F_DRIVER *gapFDriver[REDCONF_VOLUME_COUNT];
/** @brief Initialize a disk.
@param bVolNum The volume number of the volume whose block device is being
initialized.
@param mode The open mode, indicating the type of access required.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskOpen(
uint8_t bVolNum,
BDEVOPENMODE mode)
{
REDSTATUS ret;
(void)mode;
if((gpfnRedOsBDevInit == NULL) || (gapFDriver[bVolNum] != NULL))
{
ret = -RED_EINVAL;
}
else
{
F_DRIVER *pDriver;
pDriver = gpfnRedOsBDevInit(bVolNum);
if(pDriver != NULL)
{
F_PHY geom;
int iErr;
/* Validate that the geometry is consistent with the volume
configuration.
*/
iErr = pDriver->getphy(pDriver, &geom);
if(iErr == 0)
{
if( (geom.bytes_per_sector != gaRedVolConf[bVolNum].ulSectorSize)
|| (geom.number_of_sectors < gaRedVolConf[bVolNum].ullSectorCount))
{
ret = -RED_EINVAL;
}
else
{
gapFDriver[bVolNum] = pDriver;
ret = 0;
}
}
else
{
ret = -RED_EIO;
}
if(ret != 0)
{
pDriver->release(pDriver);
}
}
else
{
ret = -RED_EIO;
}
}
return ret;
}
/** @brief Uninitialize a disk.
@param bVolNum The volume number of the volume whose block device is being
uninitialized.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskClose(
uint8_t bVolNum)
{
REDSTATUS ret;
if(gapFDriver[bVolNum] == NULL)
{
ret = -RED_EINVAL;
}
else
{
gapFDriver[bVolNum]->release(gapFDriver[bVolNum]);
gapFDriver[bVolNum] = NULL;
ret = 0;
}
return ret;
}
/** @brief Read sectors from a disk.
@param bVolNum The volume number of the volume whose block device
is being read from.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to read.
@param pBuffer The buffer into which to read the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskRead(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
void *pBuffer)
{
REDSTATUS ret = 0;
F_DRIVER *pDriver = gapFDriver[bVolNum];
if(pDriver == NULL)
{
ret = -RED_EINVAL;
}
else
{
uint8_t *pbBuffer = CAST_VOID_PTR_TO_UINT8_PTR(pBuffer);
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
uint32_t ulSectorIdx;
int iErr;
for(ulSectorIdx = 0U; ulSectorIdx < ulSectorCount; ulSectorIdx++)
{
iErr = pDriver->readsector(pDriver, &pbBuffer[ulSectorIdx * ulSectorSize],
CAST_ULONG(ullSectorStart + ulSectorIdx));
if(iErr != 0)
{
ret = -RED_EIO;
break;
}
}
}
return ret;
}
#if REDCONF_READ_ONLY == 0
/** @brief Write sectors to a disk.
@param bVolNum The volume number of the volume whose block device
is being written to.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to write.
@param pBuffer The buffer from which to write the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EINVAL The block device is not open.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskWrite(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
const void *pBuffer)
{
REDSTATUS ret = 0;
F_DRIVER *pDriver = gapFDriver[bVolNum];
if(pDriver == NULL)
{
ret = -RED_EINVAL;
}
else
{
const uint8_t *pbBuffer = CAST_VOID_PTR_TO_CONST_UINT8_PTR(pBuffer);
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
uint32_t ulSectorIdx;
int iErr;
for(ulSectorIdx = 0U; ulSectorIdx < ulSectorCount; ulSectorIdx++)
{
/* We have to cast pbBuffer to non-const since the writesector
prototype is flawed, using a non-const pointer for the buffer.
*/
iErr = pDriver->writesector(pDriver, CAST_AWAY_CONST(uint8_t, &pbBuffer[ulSectorIdx * ulSectorSize]),
CAST_ULONG(ullSectorStart + ulSectorIdx));
if(iErr != 0)
{
ret = -RED_EIO;
break;
}
}
}
return ret;
}
/** @brief Flush any caches beneath the file system.
@param bVolNum The volume number of the volume whose block device is being
flushed.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskFlush(
uint8_t bVolNum)
{
REDSTATUS ret;
if(gapFDriver[bVolNum] == NULL)
{
ret = -RED_EINVAL;
}
else
{
/* The F_DRIVER interface does not include a flush function, so to be
reliable the F_DRIVER implementation must use synchronous writes.
*/
ret = 0;
}
return ret;
}
#endif /* REDCONF_READ_ONLY == 0 */
#elif BDEV_EXAMPLE_IMPLEMENTATION == BDEV_FATFS
#include <task.h>
#include <diskio.h>
/* disk_read() and disk_write() use an unsigned 8-bit value to specify the
sector count, so no transfer can be larger than 255 sectors.
*/
#define MAX_SECTOR_TRANSFER UINT8_MAX
/** @brief Initialize a disk.
@param bVolNum The volume number of the volume whose block device is being
initialized.
@param mode The open mode, indicating the type of access required.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskOpen(
uint8_t bVolNum,
BDEVOPENMODE mode)
{
DSTATUS status;
uint32_t ulTries;
REDSTATUS ret = 0;
/* With some implementations of disk_initialize(), such as the one
implemented by Atmel for the ASF, the first time the disk is opened, the
SD card can take a while to get ready, in which time disk_initialize()
returns an error. Try numerous times, waiting half a second after each
failure. Empirically, this has been observed to succeed on the second
try, so trying 10x more than that provides a margin of error.
*/
for(ulTries = 0U; ulTries < 20U; ulTries++)
{
/* Assuming that the volume number is also the correct drive number.
If this is not the case in your environment, a static constant array
can be declared to map volume numbers to the correct driver number.
*/
status = disk_initialize(bVolNum);
if(status == 0)
{
break;
}
vTaskDelay(500U / portTICK_PERIOD_MS);
}
if(status != 0)
{
ret = -RED_EIO;
}
/* Retrieve the sector size and sector count to ensure they are compatible
with our compile-time geometry.
*/
if(ret == 0)
{
WORD wSectorSize;
DWORD dwSectorCount;
DRESULT result;
result = disk_ioctl(bVolNum, GET_SECTOR_SIZE, &wSectorSize);
if(result == RES_OK)
{
result = disk_ioctl(bVolNum, GET_SECTOR_COUNT, &dwSectorCount);
if(result == RES_OK)
{
if( (wSectorSize != gaRedVolConf[bVolNum].ulSectorSize)
|| (dwSectorCount < gaRedVolConf[bVolNum].ullSectorCount))
{
ret = -RED_EINVAL;
}
}
else
{
ret = -RED_EIO;
}
}
else
{
ret = -RED_EIO;
}
}
return ret;
}
/** @brief Uninitialize a disk.
@param bVolNum The volume number of the volume whose block device is being
uninitialized.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskClose(
uint8_t bVolNum)
{
(void)bVolNum;
return 0;
}
/** @brief Read sectors from a disk.
@param bVolNum The volume number of the volume whose block device
is being read from.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to read.
@param pBuffer The buffer into which to read the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskRead(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
void *pBuffer)
{
REDSTATUS ret = 0;
uint32_t ulSectorIdx = 0U;
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
uint8_t *pbBuffer = CAST_VOID_PTR_TO_UINT8_PTR(pBuffer);
while(ulSectorIdx < ulSectorCount)
{
uint32_t ulTransfer = REDMIN(ulSectorCount - ulSectorIdx, MAX_SECTOR_TRANSFER);
DRESULT result;
result = disk_read(bVolNum, &pbBuffer[ulSectorIdx * ulSectorSize], (DWORD)(ullSectorStart + ulSectorIdx), (BYTE)ulTransfer);
if(result != RES_OK)
{
ret = -RED_EIO;
break;
}
ulSectorIdx += ulTransfer;
}
return ret;
}
#if REDCONF_READ_ONLY == 0
/** @brief Write sectors to a disk.
@param bVolNum The volume number of the volume whose block device
is being written to.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to write.
@param pBuffer The buffer from which to write the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskWrite(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
const void *pBuffer)
{
REDSTATUS ret = 0;
uint32_t ulSectorIdx = 0U;
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
const uint8_t *pbBuffer = CAST_VOID_PTR_TO_CONST_UINT8_PTR(pBuffer);
while(ulSectorIdx < ulSectorCount)
{
uint32_t ulTransfer = REDMIN(ulSectorCount - ulSectorIdx, MAX_SECTOR_TRANSFER);
DRESULT result;
result = disk_write(bVolNum, &pbBuffer[ulSectorIdx * ulSectorSize], (DWORD)(ullSectorStart + ulSectorIdx), (BYTE)ulTransfer);
if(result != RES_OK)
{
ret = -RED_EIO;
break;
}
ulSectorIdx += ulTransfer;
}
return ret;
}
/** @brief Flush any caches beneath the file system.
@param bVolNum The volume number of the volume whose block device is being
flushed.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskFlush(
uint8_t bVolNum)
{
REDSTATUS ret;
DRESULT result;
result = disk_ioctl(bVolNum, CTRL_SYNC, NULL);
if(result == RES_OK)
{
ret = 0;
}
else
{
ret = -RED_EIO;
}
return ret;
}
#endif /* REDCONF_READ_ONLY == 0 */
#elif BDEV_EXAMPLE_IMPLEMENTATION == BDEV_ATMEL_SDMMC
#include <task.h>
#include <conf_sd_mmc.h>
#include <sd_mmc.h>
#include <sd_mmc_mem.h>
#include <ctrl_access.h>
/* sd_mmc_mem_2_ram_multi() and sd_mmc_ram_2_mem_multi() use an unsigned
16-bit value to specify the sector count, so no transfer can be larger
than UINT16_MAX sectors.
*/
#define MAX_SECTOR_TRANSFER UINT16_MAX
/** @brief Initialize a disk.
@param bVolNum The volume number of the volume whose block device is being
initialized.
@param mode The open mode, indicating the type of access required.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
@retval -RED_EROFS The device is read-only media and write access was
requested.
*/
static REDSTATUS DiskOpen(
uint8_t bVolNum,
BDEVOPENMODE mode)
{
REDSTATUS ret = 0;
uint32_t ulTries;
Ctrl_status cs;
/* Note: Assuming the volume number is the same as the SD card slot. The
ASF SD/MMC driver supports two SD slots. This implementation will need
to be modified if multiple volumes share a single SD card.
*/
/* The first time the disk is opened, the SD card can take a while to get
ready, in which time sd_mmc_test_unit_ready() returns either CTRL_BUSY
or CTRL_NO_PRESENT. Try numerous times, waiting half a second after
each failure. Empirically, this has been observed to succeed on the
second try, so trying 10x more than that provides a margin of error.
*/
for(ulTries = 0U; ulTries < 20U; ulTries++)
{
cs = sd_mmc_test_unit_ready(bVolNum);
if((cs != CTRL_NO_PRESENT) && (cs != CTRL_BUSY))
{
break;
}
vTaskDelay(500U / portTICK_PERIOD_MS);
}
if(cs == CTRL_GOOD)
{
#if REDCONF_READ_ONLY == 0
if(mode != BDEV_O_RDONLY)
{
if(sd_mmc_wr_protect(bVolNum))
{
ret = -RED_EROFS;
}
}
if(ret == 0)
#endif
{
uint32_t ulSectorLast;
IGNORE_ERRORS(sd_mmc_read_capacity(bVolNum, &ulSectorLast));
/* The ASF SD/MMC driver only supports 512-byte sectors.
*/
if( (gaRedVolConf[bVolNum].ulSectorSize != 512U)
|| (((uint64_t)ulSectorLast + 1U) < gaRedVolConf[bVolNum].ullSectorCount))
{
ret = -RED_EINVAL;
}
}
}
else
{
ret = -RED_EIO;
}
return ret;
}
/** @brief Uninitialize a disk.
@param bVolNum The volume number of the volume whose block device is being
uninitialized.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskClose(
uint8_t bVolNum)
{
(void)bVolNum;
return 0;
}
/** @brief Read sectors from a disk.
@param bVolNum The volume number of the volume whose block device
is being read from.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to read.
@param pBuffer The buffer into which to read the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskRead(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
void *pBuffer)
{
REDSTATUS ret = 0;
uint32_t ulSectorIdx = 0U;
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
uint8_t *pbBuffer = CAST_VOID_PTR_TO_UINT8_PTR(pBuffer);
while(ulSectorIdx < ulSectorCount)
{
uint32_t ulTransfer = REDMIN(ulSectorCount - ulSectorIdx, MAX_SECTOR_TRANSFER);
Ctrl_status cs;
cs = sd_mmc_mem_2_ram_multi(bVolNum, (uint32_t)(ullSectorStart + ulSectorIdx),
(uint16_t)ulTransfer, &pbBuffer[ulSectorIdx * ulSectorSize]);
if(cs != CTRL_GOOD)
{
ret = -RED_EIO;
break;
}
ulSectorIdx += ulTransfer;
}
return ret;
}
#if REDCONF_READ_ONLY == 0
/** @brief Write sectors to a disk.
@param bVolNum The volume number of the volume whose block device
is being written to.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to write.
@param pBuffer The buffer from which to write the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskWrite(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
const void *pBuffer)
{
REDSTATUS ret = 0;
uint32_t ulSectorIdx = 0U;
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
const uint8_t *pbBuffer = CAST_VOID_PTR_TO_CONST_UINT8_PTR(pBuffer);
while(ulSectorIdx < ulSectorCount)
{
uint32_t ulTransfer = REDMIN(ulSectorCount - ulSectorIdx, MAX_SECTOR_TRANSFER);
Ctrl_status cs;
cs = sd_mmc_ram_2_mem_multi(bVolNum, (uint32_t)(ullSectorStart + ulSectorIdx),
(uint16_t)ulTransfer, &pbBuffer[ulSectorIdx * ulSectorSize]);
if(cs != CTRL_GOOD)
{
ret = -RED_EIO;
break;
}
ulSectorIdx += ulTransfer;
}
return ret;
}
/** @brief Flush any caches beneath the file system.
@param bVolNum The volume number of the volume whose block device is being
flushed.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskFlush(
uint8_t bVolNum)
{
REDSTATUS ret;
Ctrl_status cs;
/* The ASF SD/MMC driver appears to write sectors synchronously, so it
should be fine to do nothing and return success. However, Atmel's
implementation of the FatFs diskio.c file does the equivalent of the
below when the disk is flushed. Just in case this is important for some
non-obvious reason, do the same.
*/
cs = sd_mmc_test_unit_ready(bVolNum);
if(cs == CTRL_GOOD)
{
ret = 0;
}
else
{
ret = -RED_EIO;
}
return ret;
}
#endif /* REDCONF_READ_ONLY == 0 */
#elif BDEV_EXAMPLE_IMPLEMENTATION == BDEV_STM32_SDIO
#ifdef USE_STM324xG_EVAL
#include <stm324xg_eval.h>
#include <stm324xg_eval_sd.h>
#elif defined(USE_STM32746G_DISCO)
#include <stm32746g_discovery.h>
#include <stm32746g_discovery_sd.h>
#else
/* If you are using a compatible STM32 device other than the two listed above
and you have SD card driver headers, you can try adding them to the above
list.
*/
#error "Unsupported device."
#endif
#if REDCONF_VOLUME_COUNT > 1
#error "The STM32 SDIO block device implementation does not support multiple volumes."
#endif
#ifndef USE_HAL_DRIVER
#error "The STM32 StdPeriph driver is not supported. Please use the HAL driver or modify the Reliance Edge block device interface."
#endif
/** @brief Number of times to call BSP_SD_GetStatus() before timing out and
returning an error.
See ::CheckStatus().
NOTE: Datalight has not observed a scenario where BSP_SD_GetStatus()
returns SD_TRANSFER_BUSY after a transfer command returns successfully.
Set SD_STATUS_TIMEOUT to 0U to skip checking BSP_SD_GetStatus().
*/
#define SD_STATUS_TIMEOUT (100000U)
/** @brief 4-byte aligned buffer to use for DMA transfers when passed in
an unaligned buffer.
*/
static uint32_t gaulAlignedBuffer[512U / sizeof(uint32_t)];
#if SD_STATUS_TIMEOUT > 0U
static REDSTATUS CheckStatus(void);
#endif
/** @brief Initialize a disk.
@param bVolNum The volume number of the volume whose block device is being
initialized.
@param mode The open mode, indicating the type of access required.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO No SD card was found; or BSP_SD_Init() failed.
@retval -RED_EINVAL The SD card's block size is not the same as the
configured sector size; or the SD card is not large
enough for the volume; or the volume size is above
4GiB, meaning that part of it cannot be accessed
through the STM32 SDIO driver.
*/
static REDSTATUS DiskOpen(
uint8_t bVolNum,
BDEVOPENMODE mode)
{
REDSTATUS ret = 0;
static bool fSdInitted = false;
(void) mode;
if(!fSdInitted)
{
if(BSP_SD_Init() == MSD_OK)
{
fSdInitted = true;
}
}
if(!fSdInitted)
{
/* Above initialization attempt failed.
*/
ret = -RED_EIO;
}
else if(BSP_SD_IsDetected() == SD_NOT_PRESENT)
{
ret = -RED_EIO;
}
else
{
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
HAL_SD_CardInfoTypedef sdCardInfo = {{0}};
BSP_SD_GetCardInfo(&sdCardInfo);
/* Note: the actual card block size is sdCardInfo.CardBlockSize,
but the interface only supports a 512 byte block size. Further,
one card has been observed to report a 1024-byte block size,
but it worked fine with a 512-byte Reliance Edge ulSectorSize.
*/
if( (ulSectorSize != 512U)
|| (sdCardInfo.CardCapacity < (gaRedVolConf[bVolNum].ullSectorCount * ulSectorSize)))
{
ret = -RED_EINVAL;
}
}
return ret;
}
/** @brief Uninitialize a disk.
@param bVolNum The volume number of the volume whose block device is being
uninitialized.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskClose(
uint8_t bVolNum)
{
(void)bVolNum;
return 0;
}
/** @brief Read sectors from a disk.
@param bVolNum The volume number of the volume whose block device
is being read from.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to read.
@param pBuffer The buffer into which to read the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskRead(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
void *pBuffer)
{
REDSTATUS redStat = 0;
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
uint8_t bSdError;
if(IS_UINT32_ALIGNED_PTR(pBuffer))
{
bSdError = BSP_SD_ReadBlocks_DMA(CAST_UINT32_PTR(pBuffer), ullSectorStart * ulSectorSize, ulSectorSize, ulSectorCount);
if(bSdError != MSD_OK)
{
redStat = -RED_EIO;
}
#if SD_STATUS_TIMEOUT > 0U
else
{
redStat = CheckStatus();
}
#endif
}
else
{
uint32_t ulSectorIdx;
for(ulSectorIdx = 0U; ulSectorIdx < ulSectorCount; ulSectorIdx++)
{
bSdError = BSP_SD_ReadBlocks_DMA(gaulAlignedBuffer, (ullSectorStart + ulSectorIdx) * ulSectorSize, ulSectorSize, 1U);
if(bSdError != MSD_OK)
{
redStat = -RED_EIO;
}
#if SD_STATUS_TIMEOUT > 0U
else
{
redStat = CheckStatus();
}
#endif
if(redStat == 0)
{
uint8_t *pbBuffer = CAST_VOID_PTR_TO_UINT8_PTR(pBuffer);
RedMemCpy(&pbBuffer[ulSectorIdx * ulSectorSize], gaulAlignedBuffer, ulSectorSize);
}
else
{
break;
}
}
}
return redStat;
}
#if REDCONF_READ_ONLY == 0
/** @brief Write sectors to a disk.
@param bVolNum The volume number of the volume whose block device
is being written to.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to write.
@param pBuffer The buffer from which to write the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskWrite(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
const void *pBuffer)
{
REDSTATUS redStat = 0;
uint32_t ulSectorSize = gaRedVolConf[bVolNum].ulSectorSize;
uint8_t bSdError;
if(IS_UINT32_ALIGNED_PTR(pBuffer))
{
bSdError = BSP_SD_WriteBlocks_DMA(CAST_UINT32_PTR(CAST_AWAY_CONST(void, pBuffer)), ullSectorStart * ulSectorSize,
ulSectorSize, ulSectorCount);
if(bSdError != MSD_OK)
{
redStat = -RED_EIO;
}
#if SD_STATUS_TIMEOUT > 0U
else
{
redStat = CheckStatus();
}
#endif
}
else
{
uint32_t ulSectorIdx;
for(ulSectorIdx = 0U; ulSectorIdx < ulSectorCount; ulSectorIdx++)
{
const uint8_t *pbBuffer = CAST_VOID_PTR_TO_CONST_UINT8_PTR(pBuffer);
RedMemCpy(gaulAlignedBuffer, &pbBuffer[ulSectorIdx * ulSectorSize], ulSectorSize);
bSdError = BSP_SD_WriteBlocks_DMA(gaulAlignedBuffer, (ullSectorStart + ulSectorIdx) * ulSectorSize, ulSectorSize, 1U);
if(bSdError != MSD_OK)
{
redStat = -RED_EIO;
}
#if SD_STATUS_TIMEOUT > 0U
else
{
redStat = CheckStatus();
}
#endif
if(redStat != 0)
{
break;
}
}
}
return redStat;
}
/** @brief Flush any caches beneath the file system.
@param bVolNum The volume number of the volume whose block device is being
flushed.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskFlush(
uint8_t bVolNum)
{
/* Disk transfer is synchronous; nothing to flush.
*/
(void) bVolNum;
return 0;
}
#if SD_STATUS_TIMEOUT > 0U
/** @brief Wait until BSP_SD_GetStatus returns SD_TRANSFER_OK.
This function calls BSP_SD_GetStatus repeatedly as long as it returns
SD_TRANSFER_BUSY up to SD_STATUS_TIMEOUT times.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 SD_TRANSFER_OK was returned.
@retval -RED_EIO SD_TRANSFER_ERROR received, or timed out waiting for
SD_TRANSFER_OK.
*/
static REDSTATUS CheckStatus(void)
{
REDSTATUS redStat = 0;
uint32_t ulTimeout = SD_STATUS_TIMEOUT;
HAL_SD_TransferStateTypedef transferState;
do
{
transferState = BSP_SD_GetStatus();
ulTimeout--;
} while((transferState == SD_TRANSFER_BUSY) && (ulTimeout > 0U));
if(transferState != SD_TRANSFER_OK)
{
redStat = -RED_EIO;
}
return redStat;
}
#endif
#endif /* REDCONF_READ_ONLY == 0 */
#elif BDEV_EXAMPLE_IMPLEMENTATION == BDEV_RAM_DISK
#include <stdlib.h> /* For ALLOCATE_CLEARED_MEMORY(), which expands to calloc(). */
static uint8_t *gapbRamDisk[REDCONF_VOLUME_COUNT];
/** @brief Initialize a disk.
@param bVolNum The volume number of the volume whose block device is being
initialized.
@param mode The open mode, indicating the type of access required.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
@retval -RED_EIO A disk I/O error occurred.
*/
static REDSTATUS DiskOpen(
uint8_t bVolNum,
BDEVOPENMODE mode)
{
REDSTATUS ret = 0;
(void)mode;
if(gapbRamDisk[bVolNum] == NULL)
{
gapbRamDisk[bVolNum] = ALLOCATE_CLEARED_MEMORY(gaRedVolume[bVolNum].ulBlockCount, REDCONF_BLOCK_SIZE);
if(gapbRamDisk[bVolNum] == NULL)
{
ret = -RED_EIO;
}
}
return ret;
}
/** @brief Uninitialize a disk.
@param bVolNum The volume number of the volume whose block device is being
uninitialized.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskClose(
uint8_t bVolNum)
{
REDSTATUS ret;
if(gapbRamDisk[bVolNum] == NULL)
{
ret = -RED_EINVAL;
}
else
{
/* This implementation uses dynamically allocated memory, but must
retain previously written data after the block device is closed, and
thus the memory cannot be freed and will remain allocated until
reboot.
*/
ret = 0;
}
return ret;
}
/** @brief Read sectors from a disk.
@param bVolNum The volume number of the volume whose block device
is being read from.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to read.
@param pBuffer The buffer into which to read the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskRead(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
void *pBuffer)
{
REDSTATUS ret;
if(gapbRamDisk[bVolNum] == NULL)
{
ret = -RED_EINVAL;
}
else
{
uint64_t ullByteOffset = ullSectorStart * gaRedVolConf[bVolNum].ulSectorSize;
uint32_t ulByteCount = ulSectorCount * gaRedVolConf[bVolNum].ulSectorSize;
RedMemCpy(pBuffer, &gapbRamDisk[bVolNum][ullByteOffset], ulByteCount);
ret = 0;
}
return ret;
}
#if REDCONF_READ_ONLY == 0
/** @brief Write sectors to a disk.
@param bVolNum The volume number of the volume whose block device
is being written to.
@param ullSectorStart The starting sector number.
@param ulSectorCount The number of sectors to write.
@param pBuffer The buffer from which to write the sector data.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskWrite(
uint8_t bVolNum,
uint64_t ullSectorStart,
uint32_t ulSectorCount,
const void *pBuffer)
{
REDSTATUS ret;
if(gapbRamDisk[bVolNum] == NULL)
{
ret = -RED_EINVAL;
}
else
{
uint64_t ullByteOffset = ullSectorStart * gaRedVolConf[bVolNum].ulSectorSize;
uint32_t ulByteCount = ulSectorCount * gaRedVolConf[bVolNum].ulSectorSize;
RedMemCpy(&gapbRamDisk[bVolNum][ullByteOffset], pBuffer, ulByteCount);
ret = 0;
}
return ret;
}
/** @brief Flush any caches beneath the file system.
@param bVolNum The volume number of the volume whose block device is being
flushed.
@return A negated ::REDSTATUS code indicating the operation result.
@retval 0 Operation was successful.
*/
static REDSTATUS DiskFlush(
uint8_t bVolNum)
{
REDSTATUS ret;
if(gapbRamDisk[bVolNum] == NULL)
{
ret = -RED_EINVAL;
}
else
{
ret = 0;
}
return ret;
}
#endif /* REDCONF_READ_ONLY == 0 */
#else
#error "Invalid BDEV_EXAMPLE_IMPLEMENTATION value"
#endif /* BDEV_EXAMPLE_IMPLEMENTATION == ... */