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iin_optical.c
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iin_optical.c
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/*
* iin_optical.c
* $Id: iin_optical.c,v 1.13 2007-05-12 20:17:08 bobi Exp $
*
* Copyright 2004 Bobi B., w1zard0f07@yahoo.com
*
* This file is part of hdl_dump.
*
* hdl_dump 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 of the License, or
* (at your option) any later version.
*
* hdl_dump 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 hdl_dump; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <assert.h>
#include <ctype.h>
#include <string.h>
#include "iin_optical.h"
#include "osal.h"
#include "retcodes.h"
#include "aligned.h"
typedef struct iin_optical_type
{
iin_t iin;
osal_handle_t device;
#if defined(IIN_OPTICAL_MMAP)
#define MMAP_AREA_SIZE IIN_SECTOR_SIZE * 65536 /* 128MB */
osal_mmap_t *mm;
u_int64_t total_size;
u_int64_t ptr_start, ptr_end;
void *ptr;
#else
aligned_t *al;
#endif
unsigned long error_code; /* against osal_... */
} iin_optical_t;
/**************************************************************/
static int
opt_stat(iin_t *iin,
/*@out@*/ u_int32_t *sector_size,
/*@out@*/ u_int32_t *num_sectors)
{
iin_optical_t *opt = (iin_optical_t *)iin;
u_int64_t size_in_bytes;
int result = osal_get_device_size(opt->device, &size_in_bytes);
if (result == OSAL_OK) {
*sector_size = IIN_SECTOR_SIZE;
*num_sectors = (u_int32_t)(size_in_bytes / IIN_SECTOR_SIZE);
} else
opt->error_code = osal_get_last_error_code();
return (result);
}
/**************************************************************/
static int
opt_read(iin_t *iin,
u_int32_t start_sector,
u_int32_t num_sectors,
/*@out@*/ const char **data,
/*@out@*/ u_int32_t *length)
{
iin_optical_t *opt = (iin_optical_t *)iin;
#if defined(IIN_OPTICAL_MMAP)
u_int64_t range_start = (u_int64_t)start_sector * IIN_SECTOR_SIZE;
u_int64_t range_end = range_start + num_sectors * IIN_SECTOR_SIZE;
if (range_end > opt->total_size)
range_end = opt->total_size;
if (!(opt->ptr_start <= range_start &&
range_end <= opt->ptr_end)) { /* need to (re)map requested region */
u_int64_t tmp_start = range_start;
u_int64_t tmp_end = range_start + MMAP_AREA_SIZE;
int result;
if (tmp_end > opt->total_size)
tmp_end = opt->total_size;
if (opt->ptr != NULL) { /* reset current mapping first */
result = osal_munmap(opt->mm);
if (result != OSAL_OK)
return (result);
opt->mm = NULL;
opt->ptr = NULL;
opt->ptr_start = opt->ptr_end = 0;
}
result = osal_mmap(&opt->mm, &opt->ptr, opt->device,
tmp_start, tmp_end - tmp_start);
if (result == OSAL_OK) { /* output args are set-up below */
opt->ptr_start = tmp_start;
opt->ptr_end = tmp_end;
} else
return (result);
}
/* information we need is memory-mapped already */
*data = (const char *)opt->ptr + (range_start - opt->ptr_start);
*length = (u_int32_t)(range_end - range_start);
return (RET_OK);
#else
int result = al_read(opt->al, (u_int64_t)start_sector * IIN_SECTOR_SIZE,
data, num_sectors * IIN_SECTOR_SIZE, length);
if (result == RET_OK)
;
else
opt->error_code = osal_get_last_error_code();
return (result);
#endif /* IIN_OPTICAL_MMAP defined? */
}
/**************************************************************/
static int
opt_close(/*@special@*/ /*@only@*/ iin_t *iin) /*@releases iin@*/
{
iin_optical_t *opt = (iin_optical_t *)iin;
int result;
#if defined(IIN_OPTICAL_MMAP)
if (opt->mm != NULL)
osal_munmap(opt->mm);
#else
al_free(opt->al);
#endif
result = osal_close(&opt->device);
if (result == RET_OK)
;
else
opt->error_code = osal_get_last_error_code();
osal_free(iin);
return (result);
}
/**************************************************************/
static char *
opt_last_error(iin_t *iin)
{
iin_optical_t *opt = (iin_optical_t *)iin;
return (osal_get_error_msg(opt->error_code));
}
/**************************************************************/
static void
opt_dispose_error(/*@unused@*/ iin_t *iin,
/*@only@*/ char *error)
{
osal_dispose_error_msg(error);
}
/**************************************************************/
static iin_optical_t *
opt_alloc(osal_handle_t device,
u_int32_t device_sector_size)
{
iin_optical_t *opt = (iin_optical_t *)osal_alloc(sizeof(iin_optical_t));
if (opt != NULL) {
iin_t *iin = &opt->iin;
#if !defined(IIN_OPTICAL_MMAP)
aligned_t *al = al_alloc(device, device_sector_size, IIN_SECTOR_SIZE * IIN_NUM_SECTORS / device_sector_size);
if (al != NULL) { /* success */
#endif
memset(opt, 0, sizeof(iin_optical_t));
iin->stat = &opt_stat;
iin->read = &opt_read;
iin->close = &opt_close;
iin->last_error = &opt_last_error;
iin->dispose_error = &opt_dispose_error;
strcpy(iin->source_type, "Optical drive");
opt->device = device;
#if defined(IIN_OPTICAL_MMAP)
opt->mm = NULL;
opt->ptr = NULL;
opt->ptr_start = opt->ptr_end = 0;
{
u_int32_t sectors, size;
if (opt_stat(iin, &size, §ors) == RET_OK)
opt->total_size = (u_int64_t)sectors * size;
else {
osal_free(opt);
opt = NULL;
}
}
#else
opt->al = al;
} else { /* failed */
osal_free(opt);
opt = NULL;
}
#endif
}
return (opt);
}
/**************************************************************/
int
iin_optical_probe_path(const char *path,
iin_t **iin)
{
if (tolower(path[0]) == 'c' &&
tolower(path[1]) == 'd' &&
isdigit(path[2]) &&
((path[3] == ':' &&
path[4] == '\0') ||
(isdigit(path[3]) &&
path[4] == ':' &&
path[5] == '\0'))) { /* "cd?:" or "cd??:" matched */
char device_name[MAX_PATH];
int result = osal_map_device_name(path, device_name);
if (result == OSAL_OK) {
osal_handle_t device;
result = osal_open(device_name, &device, 1);
if (result == OSAL_OK) {
u_int32_t sector_size;
result = osal_get_device_sect_size(device, §or_size);
if (result == OSAL_OK) {
*iin = (iin_t *)opt_alloc(device, sector_size);
if (*iin != NULL)
; /* success */
else { /* opt_alloc failed */
osal_close(&device);
result = RET_NO_MEM;
}
}
}
}
return (result);
}
else {
#if defined(_BUILD_WIN32)
return (RET_NOT_COMPAT);
#else
/* don't treat files as devices */
return (RET_NOT_COMPAT);
#if 0
/* FreeBSD patch to support device nodes */
char device_name [MAX_PATH];
int result = osal_map_device_name (path, device_name);
if (result == OSAL_OK)
{
osal_handle_t device;
result = osal_open (device_name, &device, 1);
if (result == OSAL_OK)
{
u_int32_t sector_size;
result = osal_get_device_sect_size (device, §or_size);
if (result == OSAL_OK)
{
*iin = (iin_t*) opt_alloc (device, sector_size);
if (*iin != NULL)
; /* success */
else
{ /* opt_alloc failed */
osal_close (&device);
result = RET_NO_MEM;
}
}
}
}
else
result = RET_NOT_COMPAT;
return (result);
#endif
#endif
}
}