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/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/module.h>
#include <linux/ion.h>
#include <linux/iommu.h>
#include <linux/timer.h>
#include <linux/kernel.h>
#include <uapi/media/cam_req_mgr.h>
#include "cam_isp_dev.h"
#include "cam_isp_log.h"
#include "cam_hw_mgr_intf.h"
#include "cam_isp_hw_mgr_intf.h"
#include "cam_node.h"
#include "cam_debug_util.h"
#include "cam_smmu_api.h"
static struct cam_isp_dev g_isp_dev;
static void cam_isp_dev_iommu_fault_handler(
struct iommu_domain *domain, struct device *dev, unsigned long iova,
int flags, void *token, uint32_t buf_info)
{
int i = 0;
struct cam_node *node = NULL;
if (!token) {
CAM_ERR(CAM_ISP, "invalid token in page handler cb");
return;
}
node = (struct cam_node *)token;
for (i = 0; i < node->ctx_size; i++)
cam_context_dump_pf_info(&(node->ctx_list[i]), iova,
buf_info);
}
static const struct of_device_id cam_isp_dt_match[] = {
{
.compatible = "qcom,cam-isp"
},
{}
};
static int cam_isp_subdev_open(struct v4l2_subdev *sd,
struct v4l2_subdev_fh *fh)
{
mutex_lock(&g_isp_dev.isp_mutex);
g_isp_dev.open_cnt++;
mutex_unlock(&g_isp_dev.isp_mutex);
return 0;
}
static int cam_isp_subdev_close(struct v4l2_subdev *sd,
struct v4l2_subdev_fh *fh)
{
int rc = 0;
struct cam_node *node = v4l2_get_subdevdata(sd);
mutex_lock(&g_isp_dev.isp_mutex);
if (g_isp_dev.open_cnt <= 0) {
CAM_DBG(CAM_ISP, "ISP subdev is already closed");
rc = -EINVAL;
goto end;
}
g_isp_dev.open_cnt--;
if (!node) {
CAM_ERR(CAM_ISP, "Node ptr is NULL");
rc = -EINVAL;
goto end;
}
if (g_isp_dev.open_cnt == 0)
cam_node_shutdown(node);
end:
mutex_unlock(&g_isp_dev.isp_mutex);
return rc;
}
static const struct v4l2_subdev_internal_ops cam_isp_subdev_internal_ops = {
.close = cam_isp_subdev_close,
.open = cam_isp_subdev_open,
};
static int cam_isp_dev_remove(struct platform_device *pdev)
{
int rc = 0;
int i;
/* clean up resources */
for (i = 0; i < CAM_CTX_MAX; i++) {
rc = cam_isp_context_deinit(&g_isp_dev.ctx_isp[i]);
if (rc)
CAM_ERR(CAM_ISP, "ISP context %d deinit failed",
i);
}
rc = cam_subdev_remove(&g_isp_dev.sd);
if (rc)
CAM_ERR(CAM_ISP, "Unregister failed");
memset(&g_isp_dev, 0, sizeof(g_isp_dev));
return 0;
}
static int cam_isp_dev_probe(struct platform_device *pdev)
{
int rc = -1;
int i;
struct cam_hw_mgr_intf hw_mgr_intf;
struct cam_node *node;
int iommu_hdl = -1;
g_isp_dev.sd.internal_ops = &cam_isp_subdev_internal_ops;
/* Initialze the v4l2 subdevice first. (create cam_node) */
rc = cam_subdev_probe(&g_isp_dev.sd, pdev, CAM_ISP_DEV_NAME,
CAM_IFE_DEVICE_TYPE);
if (rc) {
CAM_ERR(CAM_ISP, "ISP cam_subdev_probe failed!");
goto err;
}
node = (struct cam_node *) g_isp_dev.sd.token;
memset(&hw_mgr_intf, 0, sizeof(hw_mgr_intf));
rc = cam_isp_hw_mgr_init(pdev->dev.of_node, &hw_mgr_intf, &iommu_hdl);
if (rc != 0) {
CAM_ERR(CAM_ISP, "Can not initialized ISP HW manager!");
goto unregister;
}
for (i = 0; i < CAM_CTX_MAX; i++) {
rc = cam_isp_context_init(&g_isp_dev.ctx_isp[i],
&g_isp_dev.ctx[i],
&node->crm_node_intf,
&node->hw_mgr_intf,
i);
if (rc) {
CAM_ERR(CAM_ISP, "ISP context init failed!");
goto unregister;
}
}
rc = cam_node_init(node, &hw_mgr_intf, g_isp_dev.ctx, CAM_CTX_MAX,
CAM_ISP_DEV_NAME);
if (rc) {
CAM_ERR(CAM_ISP, "ISP node init failed!");
goto unregister;
}
cam_smmu_set_client_page_fault_handler(iommu_hdl,
cam_isp_dev_iommu_fault_handler, node);
mutex_init(&g_isp_dev.isp_mutex);
CAM_INFO(CAM_ISP, "Camera ISP probe complete");
return 0;
unregister:
rc = cam_subdev_remove(&g_isp_dev.sd);
err:
return rc;
}
static struct platform_driver isp_driver = {
.probe = cam_isp_dev_probe,
.remove = cam_isp_dev_remove,
.driver = {
.name = "cam_isp",
.owner = THIS_MODULE,
.of_match_table = cam_isp_dt_match,
.suppress_bind_attrs = true,
},
};
static int __init cam_isp_dev_init_module(void)
{
return platform_driver_register(&isp_driver);
}
static void __exit cam_isp_dev_exit_module(void)
{
platform_driver_unregister(&isp_driver);
}
module_init(cam_isp_dev_init_module);
module_exit(cam_isp_dev_exit_module);
MODULE_DESCRIPTION("MSM ISP driver");
MODULE_LICENSE("GPL v2");
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