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mtd: add support for MTDIOC_ERASESECTORS ioctl

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Current driver supports MTDIOC_BULKERASE ioctl that erases the entire
device. The added ioctl MTDIOC_ERASESECTORS adds possibility to erase
just sectors defined by the user.

This is similar to MEMERASE call in Linux kernel.

Signed-off-by: Michal Lenc <michallenc@seznam.cz>
This commit is contained in:
Michal Lenc 2023-04-24 12:04:57 +02:00 committed by Xiang Xiao
parent 5afa727eef
commit 02aa7bcefe
2 changed files with 49 additions and 26 deletions
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13
drivers/mtd/mtd_partition.c
View file

@ -469,6 +469,19 @@ static int part_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
}
break;
case MTDIOC_ERASESECTORS:
{
/* Erase sectors as defined in mtd_erase_s structure */
FAR struct mtd_erase_s *erase = (FAR struct mtd_erase_s *)arg;
ret = priv->parent->erase(priv->parent,
priv->firstblock / priv->blkpererase +
erase->startblock,
erase->nblocks);
}
break;
default:
{
/* Pass any unhandled ioctl() calls to the underlying driver */

62
include/nuttx/mtd/mtd.h
View file

@ -48,32 +48,34 @@
* replace with BIOC_XIPBASE, BIOC_FLUSH and BIOC_PARTINFO instead.
*/
#define MTDIOC_GEOMETRY _MTDIOC(0x0001) /* IN: Pointer to write-able struct
* mtd_geometry_s in which to receive
* receive geometry data (see mtd.h)
* OUT: Geometry structure is populated
* with data for the MTD */
#define MTDIOC_BULKERASE _MTDIOC(0x0003) /* IN: None
* OUT: None */
#define MTDIOC_PROTECT _MTDIOC(0x0004) /* IN: Pointer to read-able struct
* mtd_protects_s that provides
* the region to protect.
* OUT: None */
#define MTDIOC_UNPROTECT _MTDIOC(0x0005) /* IN: Pointer to read-able struct
* mtd_protects_s that provides
* the region to un-protect.
* OUT: None */
#define MTDIOC_SETSPEED _MTDIOC(0x0006) /* IN: New bus speed in Hz
* OUT: None */
#define MTDIOC_EXTENDED _MTDIOC(0x0007) /* IN: unsigned long
* 0=Use normal memory region
* 1=Use alternate/extended memory
* OUT: None */
#define MTDIOC_ECCSTATUS _MTDIOC(0x0008) /* IN: Pointer to uint8_t
* OUT: ECC status */
#define MTDIOC_ERASESTATE _MTDIOC(0x000a) /* IN: Pointer to uint8_t
* OUT: Byte value that represents the
* erased state of the MTD cell */
#define MTDIOC_GEOMETRY _MTDIOC(0x0001) /* IN: Pointer to write-able struct
* mtd_geometry_s in which to receive
* receive geometry data (see mtd.h)
* OUT: Geometry structure is populated
* with data for the MTD */
#define MTDIOC_BULKERASE _MTDIOC(0x0003) /* IN: None
* OUT: None */
#define MTDIOC_PROTECT _MTDIOC(0x0004) /* IN: Pointer to read-able struct
* mtd_protects_s that provides
* the region to protect.
* OUT: None */
#define MTDIOC_UNPROTECT _MTDIOC(0x0005) /* IN: Pointer to read-able struct
* mtd_protects_s that provides
* the region to un-protect.
* OUT: None */
#define MTDIOC_SETSPEED _MTDIOC(0x0006) /* IN: New bus speed in Hz
* OUT: None */
#define MTDIOC_EXTENDED _MTDIOC(0x0007) /* IN: unsigned long
* 0=Use normal memory region
* 1=Use alternate/extended memory
* OUT: None */
#define MTDIOC_ECCSTATUS _MTDIOC(0x0008) /* IN: Pointer to uint8_t
* OUT: ECC status */
#define MTDIOC_ERASESTATE _MTDIOC(0x000a) /* IN: Pointer to uint8_t
* OUT: Byte value that represents the
* erased state of the MTD cell */
#define MTDIOC_ERASESECTORS _MTDIOC(0x000c) /* IN: Pointer to mtd_erase_s structure
* OUT: None */
/* Macros to hide implementation */
@ -139,6 +141,14 @@ struct mtd_byte_write_s
const uint8_t *buffer; /* Pointer to the data to write */
};
/* This structure describes a range of erase sectors to be erased. */
struct mtd_erase_s
{
uint32_t startblock; /* First block to be erased */
uint32_t nblocks; /* Number of blocks to be erased */
};
/* This structure defines the interface to a simple memory technology device.
* It will likely need to be extended in the future to support more complex
* devices.