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/*
* Copyright (C) 2013 Paul Kocialkowski
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <malloc.h>
#include <ctype.h>
#include <linux/ion.h>
#define LOG_TAG "exynos_ion"
#include <utils/Log.h>
#include "exynos_camera.h"
int exynos_ion_init(struct exynos_camera *exynos_camera)
{
exynos_camera->ion_fd = -1;
return 0;
}
int exynos_ion_open(struct exynos_camera *exynos_camera)
{
int fd;
fd = open("/dev/ion", O_RDWR);
if (fd < 0) {
ALOGE("%s: Unable to open ion device", __func__);
return -1;
}
exynos_camera->ion_fd = fd;
return 0;
}
void exynos_ion_close(struct exynos_camera *exynos_camera)
{
if (exynos_camera->ion_fd >= 0)
close(exynos_camera->ion_fd);
exynos_camera->ion_fd = -1;
}
int exynos_ion_alloc(struct exynos_camera *exynos_camera, int size)
{
struct ion_allocation_data alloc_data;
struct ion_fd_data share_data;
struct ion_handle_data free_data;
int page_size;
int fd;
int rc;
page_size = getpagesize();
fd = exynos_camera->ion_fd;
if (fd < 0)
return -1;
memset(&alloc_data, 0, sizeof(alloc_data));
alloc_data.len = size;
alloc_data.align = page_size;
alloc_data.flags = ION_HEAP_EXYNOS_CONTIG_MASK;
rc = ioctl(fd, ION_IOC_ALLOC, &alloc_data);
if (rc < 0)
return -1;
memset(&share_data, 0, sizeof(share_data));
share_data.handle = alloc_data.handle;
rc = ioctl(fd, ION_IOC_SHARE, &share_data);
if (rc < 0)
return -1;
memset(&free_data, 0, sizeof(free_data));
free_data.handle = alloc_data.handle;
rc = ioctl(fd, ION_IOC_FREE, &free_data);
if (rc < 0)
return -1;
return share_data.fd;
}
int exynos_ion_free(struct exynos_camera *exynos_camera, int fd)
{
close(fd);
return 0;
}
int exynos_ion_phys(struct exynos_camera *exynos_camera, int fd)
{
struct ion_custom_data custom_data;
struct ion_phys_data phys_data;
int rc;
memset(&phys_data, 0, sizeof(phys_data));
phys_data.fd_buffer = fd;
memset(&custom_data, 0, sizeof(custom_data));
custom_data.cmd = ION_EXYNOS_CUSTOM_PHYS;
custom_data.arg = (unsigned long) &phys_data;
fd = exynos_camera->ion_fd;
if (fd < 0)
return -1;
rc = ioctl(fd, ION_IOC_CUSTOM, &custom_data);
if (rc < 0)
return -1;
return (int) phys_data.phys;
}
int exynos_ion_msync(struct exynos_camera *exynos_camera, int fd,
int offset, int size)
{
struct ion_custom_data custom_data;
struct ion_msync_data msync_data;
int rc;
memset(&msync_data, 0, sizeof(msync_data));
msync_data.dir = IMSYNC_SYNC_FOR_DEV | IMSYNC_DEV_TO_RW;
msync_data.fd_buffer = fd;
msync_data.offset = offset;
msync_data.size = size;
memset(&custom_data, 0, sizeof(custom_data));
custom_data.cmd = ION_EXYNOS_CUSTOM_MSYNC;
custom_data.arg = (unsigned long) &msync_data;
fd = exynos_camera->ion_fd;
if (fd < 0)
return -1;
rc = ioctl(fd, ION_IOC_CUSTOM, &custom_data);
if (rc < 0)
return -1;
return 0;
}
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