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<div dir="auto">Great, if you could add a note to that IOCTL to that effect before commit, that'd be great since consumers shouldn't rely on it to alter their consumption of the API. Otherwise, looks good to me!<br>
<br>
</div>
<div dir="auto">Kinsey </div>
<div class="gmail_quote">On Apr 23, 2023, at 21:45, Aaron Nyholm <<a href="mailto:aaron.nyholm@unfoldedeffective.com" target="_blank">aaron.nyholm@unfoldedeffective.com</a>> wrote:
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre class="blue">Yes, it is purely informational. It just returns the 3-byte JEDEC ID.<br><br>Regards,<br>Aaron.<br><br>------- Original Message -------<br>On Monday, April 24th, 2023 at 12:35 PM, Kinsey Moore <kinsey.moore@oarcorp.com> wrote:<br><br><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">
I noticed that there is provision here to pass through the JEDEC ID from the physical device (obtained by a JEDEC parameter page read, ONFI parameter page read, or other mechanism).
<br>
<br> Is this intended to be purely informational?
<br>
<br> Kinsey
<br>
<br> On Thu, Apr 20, 2023 at 2:23 AM <aaron.nyholm@unfoldedeffective.com> wrote:
<br>
<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;">
From: Aaron Nyholm <aaron.nyholm@southerninnovation.com>
<br>
<br> ---
<br> cpukit/dev/flash/flashdev.c | 849 ++++++++++++++++++++++++++++
<br> cpukit/include/dev/flash/flashdev.h | 458 +++++++++++++++
<br> spec/build/cpukit/librtemscpu.yml | 4 +
<br> 3 files changed, 1311 insertions(+)
<br> create mode 100644 cpukit/dev/flash/flashdev.c
<br> create mode 100644 cpukit/include/dev/flash/flashdev.h
<br>
<br> diff --git a/cpukit/dev/flash/flashdev.c b/cpukit/dev/flash/flashdev.c
<br> new file mode 100644
<br> index 0000000000..03343f015f
<br> --- /dev/null
<br> +++ b/cpukit/dev/flash/flashdev.c
<br> @@ -0,0 +1,849 @@
<br> +/*
<br> + * Copyright (C) 2023 Aaron Nyholm
<br> + *
<br> + * Redistribution and use in source and binary forms, with or without
<br> + * modification, are permitted provided that the following conditions
<br> + * are met:
<br> + * 1. Redistributions of source code must retain the above copyright
<br> + * notice, this list of conditions and the following disclaimer.
<br> + * 2. Redistributions in binary form must reproduce the above copyright
<br> + * notice, this list of conditions and the following disclaimer in the
<br> + * documentation and/or other materials provided with the distribution.
<br> + *
<br> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<br> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<br> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
<br> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
<br> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
<br> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
<br> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
<br> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
<br> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
<br> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
<br> + * POSSIBILITY OF SUCH DAMAGE.
<br> + */
<br> +
<br> +#ifdef HAVE_CONFIG_H
<br> +#include "config.h"
<br> +#endif
<br> +
<br> +#include <dev/flash/flashdev.h>
<br> +
<br> +#include <rtems/imfs.h>
<br> +#include <rtems/score/assert.h>
<br> +
<br> +#include <errno.h>
<br> +#include <fcntl.h>
<br> +#include <stdlib.h>
<br> +#include <string.h>
<br> +#include <unistd.h>
<br> +
<br> +#define RTEMS_FLASHDEV_REGION_ALLOC_FULL 0xFFFFFFFFUL
<br> +#define RTEMS_FLASHDEV_REGION_UNDEFINED 0xFFFFFFFFUL
<br> +#define RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH 32
<br> +
<br> +static int rtems_flashdev_do_init(
<br> + rtems_flashdev *flash,
<br> + void ( *destroy )( rtems_flashdev *flash )
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_erase(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + void *arg
<br> +);
<br> +
<br> +static off_t rtems_flashdev_get_region_offset(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop
<br> +);
<br> +
<br> +static size_t rtems_flashdev_get_region_size(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_set_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + void *arg
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_create_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + rtems_flashdev_region *region_in
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_update_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + rtems_flashdev_region *region_in
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_clear_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_ioctl_jedec_id(
<br> + rtems_flashdev *flash
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_ioctl_flash_type(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_pageinfo_offset(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_pageinfo_index(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_page_count(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +);
<br> +
<br> +static int rtems_flashdev_ioctl_write_block_size(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +);
<br> +
<br> +static int rtems_flashdev_get_addr(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + size_t count,
<br> + off_t *addr
<br> +);
<br> +
<br> +static int rtems_flashdev_update_and_return(
<br> + rtems_libio_t *iop,
<br> + int status,
<br> + size_t count,
<br> + off_t new_offset
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_find_unalloced_region(
<br> + rtems_flashdev_region_table *region_table
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_set_region(
<br> + rtems_flashdev_region_table *region_table,
<br> + int index
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_unset_region(
<br> + rtems_flashdev_region_table *region_table,
<br> + int index
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_check_allocation(
<br> + rtems_flashdev_region_table *region_table,
<br> + int index
<br> +);
<br> +
<br> +static uint32_t rtems_flashdev_get_region_index(
<br> + rtems_libio_t *iop
<br> +)
<br> +{
<br> + return (uint32_t)iop->data0;
<br> +}
<br> +
<br> +static int rtems_flashdev_is_region_defined(
<br> + rtems_libio_t *iop
<br> +)
<br> +{
<br> + return (rtems_flashdev_get_region_index( iop ) != RTEMS_FLASHDEV_REGION_UNDEFINED);
<br> +}
<br> +
<br> +static void rtems_flashdev_set_region_index(
<br> + rtems_libio_t *iop,
<br> + uint32_t index
<br> +)
<br> +{
<br> + iop->data0 = index;
<br> +}
<br> +
<br> +static int rtems_flashdev_check_offset_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + off_t offset
<br> +)
<br> +{
<br> + if ( ( rtems_flashdev_is_region_defined( iop ) ) &&
<br> + ( offset > rtems_flashdev_get_region_size( flash, iop ) ) ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> + return 0;
<br> +}
<br> +
<br> +static void rtems_flashdev_obtain( rtems_flashdev *flash )
<br> +{
<br> + rtems_recursive_mutex_lock( &flash->mutex );
<br> +}
<br> +
<br> +static void rtems_flashdev_release( rtems_flashdev *flash )
<br> +{
<br> + rtems_recursive_mutex_unlock( &flash->mutex );
<br> +}
<br> +
<br> +static ssize_t rtems_flashdev_read(
<br> + rtems_libio_t *iop,
<br> + void *buffer,
<br> + size_t count
<br> +)
<br> +{
<br> + rtems_flashdev *flash = IMFS_generic_get_context_by_iop( iop );
<br> + off_t addr;
<br> + int status;
<br> +
<br> + if ( flash->read == NULL ) {
<br> + return 0;
<br> + }
<br> +
<br> + /* Get flash address */
<br> + status = rtems_flashdev_get_addr( flash, iop, count, &addr );
<br> + if ( status == -1 ) {
<br> + return status;
<br> + }
<br> +
<br> + /* Read flash */
<br> + rtems_flashdev_obtain( flash );
<br> + status = ( *flash->read )( flash, addr, count, buffer );
<br> + rtems_flashdev_release( flash );
<br> +
<br> + /* Update offset and return */
<br> + return rtems_flashdev_update_and_return( iop, status, count, addr + count );
<br> +}
<br> +
<br> +static ssize_t rtems_flashdev_write(
<br> + rtems_libio_t *iop,
<br> + const void *buffer,
<br> + size_t count
<br> +)
<br> +{
<br> + rtems_flashdev *flash = IMFS_generic_get_context_by_iop( iop );
<br> + off_t addr;
<br> + int status;
<br> +
<br> + if ( flash->write == NULL ) {
<br> + return 0;
<br> + }
<br> +
<br> + /* Get flash address */
<br> + status = rtems_flashdev_get_addr( flash, iop, count, &addr );
<br> + if ( status == -1 ) {
<br> + return status;
<br> + }
<br> +
<br> + /* Write to flash */
<br> + rtems_flashdev_obtain( flash );
<br> + status = ( *flash->write )( flash, addr, count, buffer );
<br> + rtems_flashdev_release( flash );
<br> +
<br> + /* Update offset and return */
<br> + return rtems_flashdev_update_and_return( iop, status, count, addr + count );
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl(
<br> + rtems_libio_t *iop,
<br> + ioctl_command_t command,
<br> + void *arg
<br> +)
<br> +{
<br> + rtems_flashdev *flash = IMFS_generic_get_context_by_iop( iop );
<br> + int err = 0;
<br> +
<br> + rtems_flashdev_obtain( flash );
<br> +
<br> + switch ( command ) {
<br> + case RTEMS_FLASHDEV_IOCTL_OBTAIN:
<br> + rtems_flashdev_obtain( flash );
<br> + err = 0;
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_RELEASE:
<br> + rtems_flashdev_release( flash );
<br> + err = 0;
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_JEDEC_ID:
<br> + *( (uint32_t *) arg ) = rtems_flashdev_ioctl_jedec_id( flash );
<br> + err = 0;
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_ERASE:
<br> + err = rtems_flashdev_ioctl_erase( flash, iop, arg );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_REGION_SET:
<br> + err = rtems_flashdev_ioctl_set_region( flash, iop, arg );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_REGION_UNSET:
<br> + err = rtems_flashdev_ioctl_clear_region( flash, iop );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_TYPE:
<br> + err = rtems_flashdev_ioctl_flash_type( flash, arg );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_PAGEINFO_BY_OFFSET:
<br> + err = rtems_flashdev_ioctl_pageinfo_offset( flash, arg );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_PAGEINFO_BY_INDEX:
<br> + err = rtems_flashdev_ioctl_pageinfo_index( flash, arg );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_PAGE_COUNT:
<br> + err = rtems_flashdev_ioctl_page_count( flash, arg );
<br> + break;
<br> + case RTEMS_FLASHDEV_IOCTL_WRITE_BLOCK_SIZE:
<br> + err = rtems_flashdev_ioctl_write_block_size( flash, arg );
<br> + break;
<br> + }
<br> +
<br> + rtems_flashdev_release( flash );
<br> + if ( err != 0 ) {
<br> + rtems_set_errno_and_return_minus_one( err );
<br> + } else {
<br> + return 0;
<br> + }
<br> +}
<br> +
<br> +static off_t rtems_flashdev_lseek(
<br> + rtems_libio_t *iop,
<br> + off_t offset,
<br> + int whence
<br> +)
<br> +{
<br> + off_t tmp_offset;
<br> + rtems_flashdev *flash = IMFS_generic_get_context_by_iop( iop );
<br> +
<br> + if ( offset < 0 ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> +
<br> + switch ( whence ) {
<br> + case SEEK_CUR:
<br> + tmp_offset = iop->offset + offset;
<br> + break;
<br> + case SEEK_SET:
<br> + tmp_offset = offset;
<br> + break;
<br> + case SEEK_END:
<br> + default:
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> +
<br> + if ( ( rtems_flashdev_is_region_defined(iop) ) &&
<br> + ( tmp_offset > rtems_flashdev_get_region_size( flash, iop ) ) ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> +
<br> + iop->offset = tmp_offset;
<br> + return iop->offset;
<br> +}
<br> +
<br> +static int rtems_flashdev_close( rtems_libio_t *iop )
<br> +{
<br> + rtems_flashdev *flash = IMFS_generic_get_context_by_iop( iop );
<br> + rtems_flashdev_ioctl_clear_region( flash, iop );
<br> + return rtems_filesystem_default_close( iop );
<br> +}
<br> +
<br> +static int rtems_flashdev_open(
<br> + rtems_libio_t *iop,
<br> + const char *path,
<br> + int oflag,
<br> + mode_t mode
<br> +)
<br> +{
<br> + int ret = rtems_filesystem_default_open( iop, path, oflag, mode );
<br> + rtems_flashdev_set_region_index(iop, RTEMS_FLASHDEV_REGION_UNDEFINED);
<br> + return ret;
<br> +}
<br> +
<br> +static const rtems_filesystem_file_handlers_r rtems_flashdev_handler = {
<br> + .open_h = rtems_flashdev_open,
<br> + .close_h = rtems_flashdev_close,
<br> + .read_h = rtems_flashdev_read,
<br> + .write_h = rtems_flashdev_write,
<br> + .ioctl_h = rtems_flashdev_ioctl,
<br> + .lseek_h = rtems_flashdev_lseek,
<br> + .fstat_h = IMFS_stat,
<br> + .ftruncate_h = rtems_filesystem_default_ftruncate,
<br> + .fsync_h = rtems_filesystem_default_fsync_or_fdatasync,
<br> + .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync,
<br> + .fcntl_h = rtems_filesystem_default_fcntl,
<br> + .kqfilter_h = rtems_filesystem_default_kqfilter,
<br> + .mmap_h = rtems_filesystem_default_mmap,
<br> + .poll_h = rtems_filesystem_default_poll,
<br> + .readv_h = rtems_filesystem_default_readv,
<br> + .writev_h = rtems_filesystem_default_writev };
<br> +
<br> +static void rtems_flashdev_node_destroy( IMFS_jnode_t *node )
<br> +{
<br> + rtems_flashdev *flash;
<br> +
<br> + flash = IMFS_generic_get_context_by_node( node );
<br> +
<br> + ( *flash->destroy )( flash );
<br> +
<br> + IMFS_node_destroy_default( node );
<br> +}
<br> +
<br> +static const IMFS_node_control
<br> + rtems_flashdev_node_control = IMFS_GENERIC_INITIALIZER(
<br> + &rtems_flashdev_handler,
<br> + IMFS_node_initialize_generic,
<br> + rtems_flashdev_node_destroy
<br> +);
<br> +
<br> +int rtems_flashdev_register( rtems_flashdev *flash, const char *flash_path )
<br> +{
<br> + int rv;
<br> + rtems_flashdev_region_table *table = flash->region_table;
<br> + int alloc_array_len;
<br> +
<br> + rv = IMFS_make_generic_node( flash_path,
<br> + S_IFCHR | S_IRWXU | S_IRWXG | S_IRWXO,
<br> + &rtems_flashdev_node_control,
<br> + flash );
<br> + if ( rv != 0 ) {
<br> + ( *flash->destroy )( flash );
<br> + }
<br> +
<br> +
<br> + if (table != NULL) {
<br> + alloc_array_len = table->max_regions/RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH +
<br> + ((table->max_regions%RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH) != 0);
<br> + for
<br> + (
<br> + int i = 0;
<br> + i < alloc_array_len;
<br> + i++
<br> + )
<br> + {
<br> + table->bit_allocator[i] = 0;
<br> + }
<br> + }
<br> +
<br> + return rv;
<br> +}
<br> +
<br> +static int rtems_flashdev_do_init(
<br> + rtems_flashdev *flash,
<br> + void ( *destroy )( rtems_flashdev *flash )
<br> +)
<br> +{
<br> + rtems_recursive_mutex_init( &flash->mutex, "RTEMS_FLASHDEV Flash" );
<br> + flash->destroy = destroy;
<br> + flash->read = NULL;
<br> + flash->write = NULL;
<br> + flash->erase = NULL;
<br> + flash->jedec_id = NULL;
<br> + flash->flash_type = NULL;
<br> + flash->page_info_by_offset = NULL;
<br> + flash->page_info_by_index = NULL;
<br> + flash->page_count = NULL;
<br> + flash->write_block_size = NULL;
<br> + flash->region_table = NULL;
<br> + return 0;
<br> +}
<br> +
<br> +void rtems_flashdev_destroy( rtems_flashdev *flash )
<br> +{
<br> + rtems_recursive_mutex_destroy( &flash->mutex );
<br> +}
<br> +
<br> +void rtems_flashdev_destroy_and_free( rtems_flashdev *flash )
<br> +{
<br> + if ( flash == NULL ) {
<br> + return;
<br> + }
<br> + rtems_recursive_mutex_destroy( &( flash->mutex ) );
<br> + free( flash );
<br> + flash = NULL;
<br> + return;
<br> +}
<br> +
<br> +int rtems_flashdev_init( rtems_flashdev *flash )
<br> +{
<br> + memset( flash, 0, sizeof( *flash ) );
<br> +
<br> + return rtems_flashdev_do_init( flash, rtems_flashdev_destroy );
<br> +}
<br> +
<br> +rtems_flashdev *rtems_flashdev_alloc_and_init( size_t size )
<br> +{
<br> + rtems_flashdev *flash = NULL;
<br> +
<br> + if ( size >= sizeof( *flash ) ) {
<br> + flash = calloc( 1, size );
<br> + if ( flash != NULL ) {
<br> + int rv;
<br> +
<br> + rv = rtems_flashdev_do_init( flash, rtems_flashdev_destroy_and_free );
<br> + if ( rv != 0 ) {
<br> + rtems_recursive_mutex_destroy( &flash->mutex );
<br> + free( flash );
<br> + return NULL;
<br> + }
<br> + }
<br> + }
<br> +
<br> + return flash;
<br> +}
<br> +
<br> +static int rtems_flashdev_get_addr(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + size_t count,
<br> + off_t *addr
<br> +)
<br> +{
<br> + off_t new_offset;
<br> +
<br> + /* Check address is in valid region */
<br> + new_offset = iop->offset + count;
<br> +
<br> + if (rtems_flashdev_check_offset_region(flash, iop, new_offset)) {
<br> + return -1;
<br> + }
<br> +
<br> + /* Get address for operation */
<br> + if ( !rtems_flashdev_is_region_defined( iop ) ) {
<br> + *addr = iop->offset;
<br> + } else {
<br> + *addr = ( iop->offset + rtems_flashdev_get_region_offset( flash, iop ) );
<br> + }
<br> + return 0;
<br> +}
<br> +
<br> +static int rtems_flashdev_update_and_return(
<br> + rtems_libio_t *iop,
<br> + int status,
<br> + size_t count,
<br> + off_t new_offset
<br> +)
<br> +{
<br> + /* Update offset and return */
<br> + if ( status == 0 ) {
<br> + iop->offset = new_offset;
<br> + return count;
<br> + } else {
<br> + rtems_set_errno_and_return_minus_one( status );
<br> + }
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_erase(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + void *arg
<br> +)
<br> +{
<br> + rtems_flashdev_region *erase_args_1;
<br> + off_t check_offset;
<br> + int status;
<br> +
<br> + if ( flash->erase == NULL ) {
<br> + return 0;
<br> + }
<br> +
<br> + erase_args_1 = (rtems_flashdev_region *) arg;
<br> + /* Check erasing valid region */
<br> + check_offset = erase_args_1->offset + erase_args_1->size;
<br> + if ( rtems_flashdev_is_region_defined( iop ) && (
<br> + rtems_flashdev_check_offset_region(flash, iop, check_offset) ||
<br> + ( erase_args_1->offset <
<br> + rtems_flashdev_get_region_offset( flash, iop ) ) ) ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> +
<br> + /* Erase flash */
<br> + status = ( *flash->erase )( flash, erase_args_1->offset, erase_args_1->size );
<br> + return status;
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_set_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + void *arg
<br> +)
<br> +{
<br> + rtems_flashdev_region *region_in;
<br> + rtems_flashdev_region_table *table = flash->region_table;
<br> + region_in = (rtems_flashdev_region *) arg;
<br> +
<br> + if (flash->region_table == NULL) {
<br> + rtems_set_errno_and_return_minus_one( ENOMEM );
<br> + }
<br> +
<br> + if ( !rtems_flashdev_is_region_defined( iop ) &&
<br> + rtems_flashdev_find_unalloced_region(table)
<br> + == RTEMS_FLASHDEV_REGION_ALLOC_FULL)
<br> + {
<br> + /* New region to allocate and all regions allocated */
<br> + rtems_set_errno_and_return_minus_one( ENOMEM );
<br> + } else if ( !rtems_flashdev_is_region_defined( iop ) &&
<br> + rtems_flashdev_find_unalloced_region(table) !=
<br> + RTEMS_FLASHDEV_REGION_ALLOC_FULL ) {
<br> + /* New region to allocate and space to allocate region */
<br> + return rtems_flashdev_ioctl_create_region( flash, iop, region_in );
<br> + } else {
<br> + /* Updating existing region */
<br> + return rtems_flashdev_ioctl_update_region( flash, iop, region_in );
<br> + }
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_create_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + rtems_flashdev_region *region_in
<br> +)
<br> +{
<br> + int i;
<br> + rtems_flashdev_region_table *table = flash->region_table;
<br> +
<br> + /* Find unallocated region slot */
<br> + i = rtems_flashdev_find_unalloced_region(flash->region_table);
<br> +
<br> + /* Set region values */
<br> + table->regions[ i ].offset = region_in->offset;
<br> + table->regions[ i ].size = region_in->size;
<br> +
<br> + /* Set region as allocated and link iop */
<br> + rtems_flashdev_set_region(flash->region_table, i);
<br> + rtems_flashdev_set_region_index( iop, i );
<br> +
<br> + return 0;
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_update_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop,
<br> + rtems_flashdev_region *region_in
<br> +)
<br> +{
<br> + uint32_t region_index = rtems_flashdev_get_region_index( iop );
<br> + rtems_flashdev_region_table *table = flash->region_table;
<br> +
<br> + /**
<br> + * If region index is larger then maximum region index or region
<br> + * index at given index is undefined return an error.
<br> + */
<br> + if (
<br> + ( region_index >= flash->region_table->max_regions ) ||
<br> + ( rtems_flashdev_check_allocation( table, region_index ) == 0)
<br> + )
<br> + {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> +
<br> + /* Set region values */
<br> + table->regions[ region_index ].offset = region_in->offset;
<br> + table->regions[ region_index ].size = region_in->size;
<br> +
<br> + return 0;
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_clear_region(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop
<br> +)
<br> +{
<br> + uint32_t region_index = rtems_flashdev_get_region_index( iop );
<br> +
<br> + if (flash->region_table == NULL) {
<br> + rtems_set_errno_and_return_minus_one( ENOMEM );
<br> + }
<br> +
<br> + /* Check region to clear */
<br> + if ( region_index == RTEMS_FLASHDEV_REGION_UNDEFINED ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> +
<br> + /* Clear region */
<br> + rtems_flashdev_unset_region( flash->region_table, region_index );
<br> + rtems_flashdev_set_region_index( iop, RTEMS_FLASHDEV_REGION_UNDEFINED );
<br> + return 0;
<br> +}
<br> +
<br> +static off_t rtems_flashdev_get_region_offset(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop
<br> +)
<br> +{
<br> + rtems_flashdev_region_table *table = flash->region_table;
<br> + return table->regions[ rtems_flashdev_get_region_index( iop ) ].offset;
<br> +}
<br> +
<br> +static size_t rtems_flashdev_get_region_size(
<br> + rtems_flashdev *flash,
<br> + rtems_libio_t *iop
<br> +)
<br> +{
<br> + rtems_flashdev_region_table *table = flash->region_table;
<br> + return table->regions[ rtems_flashdev_get_region_index( iop ) ].size;
<br> +}
<br> +
<br> +static uint32_t rtems_flashdev_ioctl_jedec_id( rtems_flashdev *flash )
<br> +{
<br> + if ( flash->jedec_id == NULL ) {
<br> + return 0;
<br> + } else {
<br> + return ( *flash->jedec_id )( flash );
<br> + }
<br> +}
<br> +
<br> +static uint32_t rtems_flashdev_ioctl_flash_type(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +)
<br> +{
<br> + rtems_flashdev_flash_type *type = (rtems_flashdev_flash_type*)arg;
<br> + if ( flash->flash_type == NULL ) {
<br> + return 0;
<br> + } else {
<br> + return ( *flash->flash_type )( flash, type );
<br> + }
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_pageinfo_offset(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +)
<br> +{
<br> + rtems_flashdev_ioctl_page_info *page_info;
<br> +
<br> + if ( arg == NULL ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> + if ( flash->page_info_by_offset == NULL ) {
<br> + return 0;
<br> + } else {
<br> + page_info = (rtems_flashdev_ioctl_page_info *) arg;
<br> + return ( *flash->page_info_by_offset )( flash,
<br> + page_info->location,
<br> + &page_info->page_info.offset,
<br> + &page_info->page_info.size );
<br> + }
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_pageinfo_index( rtems_flashdev *flash,
<br> + void *arg )
<br> +{
<br> + rtems_flashdev_ioctl_page_info *page_info;
<br> +
<br> + if ( arg == NULL ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> + if ( flash->page_info_by_index == NULL ) {
<br> + return 0;
<br> + } else {
<br> + page_info = (rtems_flashdev_ioctl_page_info *) arg;
<br> + return ( *flash->page_info_by_index )( flash,
<br> + page_info->location,
<br> + &page_info->page_info.offset,
<br> + &page_info->page_info.size );
<br> + }
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_page_count( rtems_flashdev *flash, void *arg )
<br> +{
<br> + if ( arg == NULL ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> + if ( flash->page_count == NULL ) {
<br> + return 0;
<br> + } else {
<br> + return ( *flash->page_count )( flash, ( (int *) arg ) );
<br> + }
<br> +}
<br> +
<br> +static int rtems_flashdev_ioctl_write_block_size(
<br> + rtems_flashdev *flash,
<br> + void *arg
<br> +)
<br> +{
<br> + if ( arg == NULL ) {
<br> + rtems_set_errno_and_return_minus_one( EINVAL );
<br> + }
<br> + if ( flash->write_block_size == NULL ) {
<br> + return 0;
<br> + } else {
<br> + return ( *flash->write_block_size )( flash, ( (size_t *) arg ) );
<br> + }
<br> +}
<br> +
<br> +static uint32_t rtems_flashdev_find_unalloced_region(
<br> + rtems_flashdev_region_table *region_table
<br> +)
<br> +{
<br> + int final_index =
<br> + ( region_table->max_regions / RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH );
<br> +
<br> + for ( int i = 0; i < final_index; i++ ) {
<br> + /* If region the next 32 regions are full check the next allocator */
<br> + if (region_table->bit_allocator[ i ] == RTEMS_FLASHDEV_REGION_ALLOC_FULL) {
<br> + continue;
<br> + }
<br> +
<br> + for (int x = 0; x < RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH; x++) {
<br> + if ( ! ( ( ( region_table->bit_allocator[ i ] ) >> x ) & 1UL ) ) {
<br> + return RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH * i + x;
<br> + }
<br> + }
<br> + }
<br> +
<br> + for
<br> + (
<br> + int i = 0;
<br> + i < ( region_table->max_regions % RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH );
<br> + i++
<br> + )
<br> + {
<br> + if ( ! ( ( ( region_table->bit_allocator[ final_index ] ) >> i ) & 1UL ) ) {
<br> + return RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH * final_index + i;
<br> + }
<br> + }
<br> +
<br> + return RTEMS_FLASHDEV_REGION_ALLOC_FULL;
<br> +
<br> +}
<br> +
<br> +static uint32_t rtems_flashdev_set_region(
<br> + rtems_flashdev_region_table *region_table,
<br> + int index
<br> +)
<br> +{
<br> + int array_index = index / RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH;
<br> + int shift = index % RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH;
<br> +
<br> + region_table->bit_allocator[ array_index ] |= 1UL << shift;
<br> +
<br> + return index;
<br> +}
<br> +
<br> +static uint32_t rtems_flashdev_unset_region(
<br> + rtems_flashdev_region_table *region_table,
<br> + int index
<br> +)
<br> +{
<br> + int array_index = index / RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH;
<br> + int shift = index % RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH;
<br> +
<br> + region_table->bit_allocator[ array_index ] &= ~( 1UL << shift );
<br> +
<br> + return index;
<br> +}
<br> +
<br> +static uint32_t rtems_flashdev_check_allocation(
<br> + rtems_flashdev_region_table *region_table,
<br> + int index
<br> +)
<br> +{
<br> + int array_index = index / RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH;
<br> + int shift = index%RTEMS_FLASHDEV_REGION_BITALLOC_LENGTH;
<br> +
<br> + return ( ( region_table->bit_allocator[ array_index ] >> shift ) & 1UL );
<br> +}
<br> diff --git a/cpukit/include/dev/flash/flashdev.h b/cpukit/include/dev/flash/flashdev.h
<br> new file mode 100644
<br> index 0000000000..aee585d252
<br> --- /dev/null
<br> +++ b/cpukit/include/dev/flash/flashdev.h
<br> @@ -0,0 +1,458 @@
<br> +/* SPDX-License-Identifier: BSD-2-Clause */
<br> +
<br> +/**
<br> + * @file
<br> + *
<br> + * @ingroup Flash
<br> + *
<br> + * @brief Generic Flash API
<br> + */
<br> +
<br> +/*
<br> + * Copyright (C) 2023 Aaron Nyholm
<br> + *
<br> + * Redistribution and use in source and binary forms, with or without
<br> + * modification, are permitted provided that the following conditions
<br> + * are met:
<br> + * 1. Redistributions of source code must retain the above copyright
<br> + * notice, this list of conditions and the following disclaimer.
<br> + * 2. Redistributions in binary form must reproduce the above copyright
<br> + * notice, this list of conditions and the following disclaimer in the
<br> + * documentation and/or other materials provided with the distribution.
<br> + *
<br> + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<br> + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<br> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
<br> + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
<br> + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
<br> + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
<br> + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
<br> + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
<br> + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
<br> + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
<br> + * POSSIBILITY OF SUCH DAMAGE.
<br> + */
<br> +
<br> +#ifndef _DEV_FLASHDEV_H
<br> +#define _DEV_FLASHDEV_H
<br> +
<br> +#include <rtems/thread.h>
<br> +#include <sys/types.h>
<br> +
<br> +typedef struct rtems_flashdev rtems_flashdev;
<br> +
<br> +/**
<br> + * @defgroup Generic Flash API
<br> + *
<br> + * @ingroup RTEMSDeviceDrivers
<br> + *
<br> + * @brief Generic Flash API to wrap specific device drivers.
<br> + *
<br> + * @{
<br> + */
<br> +
<br> +/* IOCTL Calls */
<br> +
<br> +/**
<br> + * @brief Obtains the flash device.
<br> + *
<br> + * This command has no argument.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_OBTAIN 0
<br> +/**
<br> + * @brief Releases the flash device.
<br> + *
<br> + * This command has no argument.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_RELEASE 1
<br> +/**
<br> + * @brief Returns the JEDEC ID of the flash device.
<br> + *
<br> + * @param[out] jedec_id Pointer to uint32_t in which the JEDEC ID is
<br> + * returned in.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_JEDEC_ID 2
<br> +/**
<br> + * @brief Erases flash device.
<br> + *
<br> + * @param[in] erase_args Pointer to rtems_flashdev_region struct
<br> + * containing offset and size of erase to be performed.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_ERASE 3
<br> +/**
<br> + * @brief Set a region that limits read, write and erase calls to within it.
<br> + * Regions are file descriptor specific and limited to a single region per
<br> + * file descriptor and 32 regions total per flash device. Regions can be
<br> + * changed or updated by calling this IOCTL again.
<br> + *
<br> + * @param[in] region Pointer to rtems_flashdev_region struct containing
<br> + * base and length of defined region.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_REGION_SET 4
<br> +/**
<br> + * @brief Removes the set region on the file descriptor.
<br> + *
<br> + * This command has no argument.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_REGION_UNSET 5
<br> +/**
<br> + * @brief Returns the type of flash device (e.g. NOR or NAND).
<br> + *
<br> + * @param[out] flash_type Pointer to integer which is set to the flash
<br> + * type macro value.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_TYPE 6
<br> +
<br> +/**
<br> + * @brief Get the size and address of flash page at given offset
<br> + *
<br> + * The offset ignores the region limiting. To find page of region
<br> + * limited offset add the base of the region to the desired offset.
<br> + *
<br> + * @param[in,out] rtems_flashdev_ioctl_page_info arg Pointer to struct
<br> + * with offset and space for return values.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_PAGEINFO_BY_OFFSET 7
<br> +
<br> +/**
<br> + * @brief Get the size and address of nth flash page where n is index passed in.
<br> + *
<br> + * The index ignores the region limiting.
<br> + *
<br> + * @param[in,out] rtems_flashdev_ioctl_page_info arg Pointer to struct
<br> + * with index and space for return values.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_PAGEINFO_BY_INDEX 8
<br> +
<br> +/**
<br> + * @brief Get the number of pages in flash device.
<br> + *
<br> + * @param[out] count Integer containing the number of pages.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_PAGE_COUNT 9
<br> +
<br> +/**
<br> + * @brief Get the minimum write size supported by the driver.
<br> + *
<br> + * @param[out] count Integer containing the minimum write size.
<br> + */
<br> +#define RTEMS_FLASHDEV_IOCTL_WRITE_BLOCK_SIZE 10
<br> +
<br> +/**
<br> + * @brief The maximum number of region limited file descriptors
<br> + * allowed to be open at once.
<br> + */
<br> +#define RTEMS_FLASHDEV_MAX_REGIONS 32
<br> +
<br> +/**
<br> + * @brief Enum for flash type returned from IOCTL call.
<br> + */
<br> +typedef enum rtems_flashdev_flash_type {
<br> + /**
<br> + * @brief The flash device is NOR flash.
<br> + **/
<br> + RTEMS_FLASHDEV_NOR,
<br> + /**
<br> + * @brief The flash device is NAND flash.
<br> + */
<br> + RTEMS_FLASHDEV_NAND
<br> +} rtems_flashdev_flash_type;
<br> +
<br> +/**
<br> + * @brief General definition for on flash device.
<br> + */
<br> +typedef struct rtems_flashdev_region {
<br> + /**
<br> + * @brief Base of region.
<br> + */
<br> + off_t offset;
<br> + /**
<br> + * @brief Length of region.
<br> + */
<br> + size_t size;
<br> +} rtems_flashdev_region;
<br> +
<br> +/**
<br> + * @brief Struct holding region definitions
<br> + */
<br> +typedef struct rtems_flashdev_region_table {
<br> + /**
<br> + * @brief The maximum regions that can be defined at once.
<br> + */
<br> + int max_regions;
<br> +
<br> + /**
<br> + * @brief Pointer to array of rtems_flashdev_region of length
<br> + * max_regions
<br> + */
<br> + rtems_flashdev_region* regions;
<br> +
<br> + /**
<br> + * @brief Array of uint32_t acting as bit allocator
<br> + * for regions array.
<br> + */
<br> + uint32_t *bit_allocator;
<br> +} rtems_flashdev_region_table;
<br> +
<br> +/**
<br> + * @brief Page information returned from IOCTL calls.
<br> + */
<br> +typedef struct rtems_flashdev_ioctl_page_info {
<br> + /**
<br> + * @brief Offset or index to find page at.
<br> + */
<br> + off_t location;
<br> +
<br> + /**
<br> + * @brief Information returned about the page. Including the
<br> + * base offset and size of page.
<br> + */
<br> + rtems_flashdev_region page_info;
<br> +} rtems_flashdev_ioctl_page_info;
<br> +
<br> +/**
<br> + * @brief Flash device.
<br> + */
<br> +struct rtems_flashdev {
<br> + /**
<br> + * @brief Call to the device driver to read the flash device.
<br> + *
<br> + * @param[in] flash Pointer to flash device.
<br> + * @param[in] offset Address to read from.
<br> + * @param[in] count Number of bytes to read.
<br> + * @param[out] buffer Buffer for data to be read into.
<br> + *
<br> + * @retval 0 Successful operation.
<br> + * @retval 1 Failed operation.
<br> + */
<br> + int ( *read )(
<br> + rtems_flashdev *flash,
<br> + uintptr_t offset,
<br> + size_t count,
<br> + void *buffer
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to the device driver to write to the flash device.
<br> + *
<br> + * @param[in] flash Pointer to flash device.
<br> + * @param[in] offset Address to write to.
<br> + * @param[in] count Number of bytes to read.
<br> + * @param[in] buffer Buffer for data to be written from.
<br> + *
<br> + * @retval 0 Successful operation.
<br> + * @retval 1 Failed operation.
<br> + */
<br> + int ( *write )(
<br> + rtems_flashdev *flash,
<br> + uintptr_t offset,
<br> + size_t count,
<br> + const void *buffer
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to the device driver to erase the flash device.
<br> + *
<br> + * @param[in] flash Pointer to flash device.
<br> + * @param[in] offset Address to erase at.
<br> + * @param[in] count Number of bytes to erase.
<br> + *
<br> + * @retval 0 Successful operation.
<br> + * @retval 1 Failed operation.
<br> + */
<br> + int ( *erase )(
<br> + rtems_flashdev *flash,
<br> + uintptr_t offset,
<br> + size_t count
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to the device driver to return the JEDEC ID.
<br> + *
<br> + * @param[in] flash The flash device.
<br> + *
<br> + * @retval JEDEC ID.
<br> + */
<br> + uint32_t ( *jedec_id )(
<br> + rtems_flashdev *flash
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to the device driver to return the flash type.
<br> + *
<br> + * @param[in] flash The flash device.
<br> + * @param[out] type The type of flash device.
<br> + *
<br> + * @retval 0 Success
<br> + * @retbal Other Failure
<br> + */
<br> + int ( *flash_type )(
<br> + rtems_flashdev *flash,
<br> + rtems_flashdev_flash_type *type
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to device driver to get size and offset of page at
<br> + * given offset.
<br> + *
<br> + * @param[in] flash The flash device
<br> + * @param[in] search_offset The offset of the page which info is to be
<br> + * returned.
<br> + * @param[out] page_offset The offset of the start of the page
<br> + * @param[out] page_size The size of the page
<br> + *
<br> + * @retval 0 Success.
<br> + * @retval non-zero Failed.
<br> + */
<br> + int ( *page_info_by_offset )(
<br> + rtems_flashdev *flash,
<br> + off_t search_offset,
<br> + off_t *page_offset,
<br> + size_t *page_size
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to device driver to get size and offset of page at
<br> + * given index.
<br> + *
<br> + * @param[in] flash The flash device
<br> + * @param[in] search_index The index of the page which info is to be returned.
<br> + * @param[out] page_offset The offset of the start of the page
<br> + * @param[out] page_size The size of the page
<br> + *
<br> + * @retval 0 Success.
<br> + * @retval non-zero Failed.
<br> + */
<br> + int ( *page_info_by_index )(
<br> + rtems_flashdev *flashdev,
<br> + off_t search_index,
<br> + off_t *page_offset,
<br> + size_t *page_size
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to device driver to return the number of pages on the flash
<br> + * device.
<br> + *
<br> + * @param[out] page_count The number of pages on the flash device.
<br> + *
<br> + * @retval 0 Success.
<br> + * @retval non-zero Failed.
<br> + */
<br> + int ( *page_count )(
<br> + rtems_flashdev *flashdev,
<br> + int *page_count
<br> + );
<br> +
<br> + /**
<br> + * @brief Call to device driver to return the minimum write size of the
<br> + * flash device.
<br> + *
<br> + * @param[out] write_block_size The minimum write size of the flash device.
<br> + *
<br> + * @retval 0 Success.
<br> + * @retval non-zero Failed.
<br> + */
<br> + int ( *write_block_size )(
<br> + rtems_flashdev *flashdev,
<br> + size_t *write_block_size
<br> + );
<br> +
<br> + /**
<br> + * @brief Destroys the flash device.
<br> + *
<br> + * @param[in] flash Pointer to flash device.
<br> + */
<br> + void ( *destroy )(
<br> + rtems_flashdev *flashdev
<br> + );
<br> +
<br> + /**
<br> + * @brief Pointer to device driver.
<br> + */
<br> + void *driver;
<br> +
<br> + /**
<br> + * @brief Mutex to protect the flash device access.
<br> + */
<br> + rtems_recursive_mutex mutex;
<br> +
<br> + /**
<br> + * @brief Region table defining size and memory for region allocations
<br> + */
<br> + rtems_flashdev_region_table *region_table;
<br> +};
<br> +
<br> +/**
<br> + * @brief Allocate and initialize the flash device.
<br> + *
<br> + * After a successful allocation and initialization of the flash device
<br> + * it must be destroyed via rtems_flashdev_destroy_and_free().
<br> + *
<br> + * @param[in] size The number of bytes to allocate.
<br> + *
<br> + * @retval NULL Failed to set up flash device.
<br> + * @retval non-NULL The new flash device.
<br> + */
<br> +rtems_flashdev *rtems_flashdev_alloc_and_init(
<br> + size_t size
<br> +);
<br> +
<br> +/**
<br> + * @brief Initialize the flash device.
<br> + *
<br> + * After a successful initialization of the flash device it must be
<br> + * destroyed via rtems_flashdev_destory().
<br> + *
<br> + * After initialization and before registration read, write, erase, jedec_id
<br> + * and flash_type functions need to be set in the flashdev.
<br> + *
<br> + * @param[in] flash The flash device to initialize.
<br> + *
<br> + * @retval 1 Failed to set up flash device.
<br> + * @retval 0 Successful set up of flash device.
<br> + */
<br> +int rtems_flashdev_init(
<br> + rtems_flashdev *flash
<br> +);
<br> +
<br> +/**
<br> + * @brief Register the flash device.
<br> + *
<br> + * This function always claims ownership of the flash device.
<br> + *
<br> + * After initialization and before registration read, write, erase, jedec_id
<br> + * and flash_type functions need to be set in the flashdev.
<br> + *
<br> + * @param[in] flash The flash device.
<br> + * @param[in] flash_path The path to the flash device file.
<br> + *
<br> + * @retval 0 Successful operation.
<br> + * @retval non-zero Failed operation.
<br> + */
<br> +int rtems_flashdev_register(
<br> + rtems_flashdev *flash,
<br> + const char *flash_path
<br> +);
<br> +
<br> +/**
<br> + * @brief Destroys the flash device.
<br> + *
<br> + * @param[in] flash The flash device.
<br> + */
<br> +void rtems_flashdev_destroy(
<br> + rtems_flashdev *flash
<br> +);
<br> +
<br> +/**
<br> + * @brief Destroys the flash device and frees its memory.
<br> + *
<br> + * @param[in] flash The flash device.
<br> + */
<br> +void rtems_flashdev_destroy_and_free(
<br> + rtems_flashdev *flash
<br> +);
<br> +
<br> +/** @} */
<br> +
<br> +#endif /* _DEV_FLASHDEV_H */
<br> diff --git a/spec/build/cpukit/librtemscpu.yml b/spec/build/cpukit/librtemscpu.yml
<br> index 2c969aa5f6..86c5c8ff2b 100644
<br> --- a/spec/build/cpukit/librtemscpu.yml
<br> +++ b/spec/build/cpukit/librtemscpu.yml
<br> @@ -52,6 +52,9 @@ install:
<br> - destination: ${BSP_INCLUDEDIR}/dev/spi
<br> source:
<br> - cpukit/include/dev/spi/spi.h
<br> +- destination: ${BSP_INCLUDEDIR}/dev/flash
<br> + source:
<br> + - cpukit/include/dev/flash/flashdev.h
<br> - destination: ${BSP_INCLUDEDIR}/dev/can
<br> source:
<br> - cpukit/include/dev/can/can.h
<br> @@ -522,6 +525,7 @@ links:
<br> - role: build-dependency
<br> uid: vckey
<br> source:
<br> +- cpukit/dev/flash/flashdev.c
<br> - cpukit/dev/i2c/eeprom.c
<br> - cpukit/dev/i2c/fpga-i2c-slave.c
<br> - cpukit/dev/i2c/gpio-nxp-pca9535.c
<br> --
<br> 2.25.1
<br>
<br>
<hr>
<br> devel mailing list
<br> devel@rtems.org
<br>
<a href="http://lists.rtems.org/mailman/listinfo/devel">http://lists.rtems.org/mailman/listinfo/devel</a>
<br>
</blockquote>
</blockquote></pre>
</blockquote>
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