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#ifndef CYGONCE_DISK_H
#define CYGONCE_DISK_H
// ====================================================================
//
// disk.h
//
// Device I/O
//
// ====================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
//
// eCos 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; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but 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 eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
// ====================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): savin
// Original data: gthomas
// Date: 2003-06-09
// Purpose: Internal interfaces for disk I/O drivers
// Description:
//
//####DESCRIPTIONEND####
//
// ====================================================================
// Disk I/O interfaces
#include <pkgconf/system.h>
#include <pkgconf/io_disk.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/io/devtab.h>
#include <cyg/io/io.h>
#include <cyg/hal/drv_api.h>
#include <string.h> /* memset() */
// ---------------------------------------------------------------------------
typedef struct cyg_disk_partition_t cyg_disk_partition_t;
typedef struct cyg_disk_info_t cyg_disk_info_t;
typedef struct cyg_disk_identify_t cyg_disk_identify_t;
typedef struct disk_channel disk_channel;
typedef struct disk_controller disk_controller;
typedef struct disk_funs disk_funs;
// ---------------------------------------------------------------------------
// Pointers into upper-level driver
typedef struct {
// Initialize the disk
cyg_bool (*disk_init)(struct cyg_devtab_entry *tab);
// Disk device has been connected
Cyg_ErrNo (*disk_connected)(struct cyg_devtab_entry *tab,
cyg_disk_identify_t *ident);
// Disk device has been disconnected
Cyg_ErrNo (*disk_disconnected)(struct disk_channel *chan);
// Lookup disk device
Cyg_ErrNo (*disk_lookup)(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *sub_tab,
const char *name);
// Asynchronous block transfer done
void (*disk_transfer_done)(struct disk_channel *chan, Cyg_ErrNo res);
} disk_callbacks_t;
#define DISK_CALLBACKS(_l, \
_init, \
_connected, \
_disconnected, \
_lookup, \
_transfer_done) \
disk_callbacks_t _l = { \
_init, \
_connected, \
_disconnected, \
_lookup, \
_transfer_done \
};
extern disk_callbacks_t cyg_io_disk_callbacks;
// ---------------------------------------------------------------------------
// Private data which describes a disk controller
struct disk_controller {
cyg_drv_mutex_t lock; // Per-controller lock
cyg_drv_cond_t queue; // Access wait list
cyg_drv_cond_t async; // Async transfer waits here
void *priv; // Private data
volatile Cyg_ErrNo result; // Last operation result
cyg_bool init; // Initialized?
volatile cyg_bool busy; // Busy?
};
#define DISK_CONTROLLER(_l, _priv) \
static disk_controller _l = { \
priv: &_priv, \
init: false, \
busy: false \
};
// ---------------------------------------------------------------------------
// Private data which describes this channel
struct disk_channel {
disk_funs *funs;
disk_callbacks_t *callbacks;
void *dev_priv; // device private data
disk_controller *controller; // pointer to controller
cyg_disk_info_t *info; // disk info
cyg_disk_partition_t *partition; // partition data
struct cyg_devtab_entry *pdevs_dev; // partition devs devtab ents
disk_channel *pdevs_chan; // partition devs disk chans
cyg_bool mbr_support; // true if disk has MBR
cyg_bool valid; // true if device valid
cyg_bool init; // true if initialized
cyg_ucount16 mounts; // count of number of mounts
};
// Initialization macro for disk channel
#define DISK_CHANNEL(_l, \
_funs, \
_dev_priv, \
_controller, \
_mbr_supp, \
_max_part_num) \
static struct cyg_devtab_entry _l##_part_dev[_max_part_num]; \
static disk_channel _l##_part_chan[_max_part_num]; \
static cyg_disk_partition_t _l##_part_tab[_max_part_num]; \
static cyg_disk_info_t _l##_disk_info = { \
_l##_part_tab, \
_max_part_num \
}; \
static disk_channel _l = { \
&(_funs), \
&cyg_io_disk_callbacks, \
&(_dev_priv), \
&(_controller), \
&(_l##_disk_info), \
NULL, \
_l##_part_dev, \
_l##_part_chan, \
_mbr_supp, \
false, \
false, \
0 \
};
// Initialization macro for disk channel allocated elsewhere.
#define DISK_CHANNEL_INIT(_dc, \
_funs, \
_dev_priv, \
_controller, \
_disk_info, \
_part_dev, \
_part_chan, \
_part_tab, \
_mbr_supp, \
_max_part_num) \
CYG_MACRO_START \
memset((_disk_info), 0, sizeof(cyg_disk_info_t)); \
(_dc).funs = &(_funs); \
(_dc).callbacks = &cyg_io_disk_callbacks; \
(_dc).dev_priv = (_dev_priv); \
(_dc).controller = &(_controller); \
(_dc).info = &(_disk_info); \
(_dc).info->partitions = (_part_tab); \
(_dc).pdevs_dev = (_part_dev); \
(_dc).pdevs_chan = (_part_chan); \
(_dc).partition = NULL; \
(_dc).mbr_support = (_mbr_supp); \
(_dc).valid = false; \
(_dc).init = false; \
(_dc).mounts = 0; \
(_dc).info->partitions_num = (_max_part_num); \
CYG_MACRO_END
// ---------------------------------------------------------------------------
// Low level interface functions
struct disk_funs {
// Read block data into buf
Cyg_ErrNo (*read)(disk_channel *priv,
void *buf,
cyg_uint32 len,
cyg_uint32 block_num);
// Write block data from buf
Cyg_ErrNo (*write)(disk_channel *priv,
const void *buf,
cyg_uint32 len,
cyg_uint32 block_num);
// Get hardware configuration
Cyg_ErrNo (*get_config)(disk_channel *priv,
cyg_uint32 key,
const void *xbuf,
cyg_uint32 *len);
// Set hardware configuration
Cyg_ErrNo (*set_config)(disk_channel *priv,
cyg_uint32 key,
const void *xbuf,
cyg_uint32 *len);
};
#define DISK_FUNS(_l,_read,_write,_get_config,_set_config) \
static disk_funs _l = { \
_read, \
_write, \
_get_config, \
_set_config \
};
extern cyg_devio_table_t cyg_io_disk_devio;
// ---------------------------------------------------------------------------
#include <cyg/io/diskio.h>
// ---------------------------------------------------------------------------
#endif // CYGONCE_DISK_H
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