#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/videodev2.h>
#include <media/v4l2-fwnode.h>
#include <media/v4l2-mc.h>
#include "stf-camss.h"
static const char * const stfcamss_clocks[] = {
"wrapper_clk_c",
"ispcore_2x",
"isp_axi",
};
static const char * const stfcamss_resets[] = {
"wrapper_p",
"wrapper_c",
"axiwr",
"isp_top_n",
"isp_top_axi",
};
static const struct stf_isr_data stf_isrs[] = {
{"wr_irq", stf_wr_irq_handler},
{"isp_irq", stf_isp_irq_handler},
{"line_irq", stf_line_irq_handler},
};
static int stfcamss_get_mem_res(struct stfcamss *stfcamss)
{
struct platform_device *pdev = to_platform_device(stfcamss->dev);
stfcamss->syscon_base =
devm_platform_ioremap_resource_byname(pdev, "syscon");
if (IS_ERR(stfcamss->syscon_base))
return PTR_ERR(stfcamss->syscon_base);
stfcamss->isp_base = devm_platform_ioremap_resource_byname(pdev, "isp");
if (IS_ERR(stfcamss->isp_base))
return PTR_ERR(stfcamss->isp_base);
return 0;
}
static int stfcamss_of_parse_endpoint_node(struct stfcamss *stfcamss,
struct device_node *node,
struct stfcamss_async_subdev *csd)
{
struct v4l2_fwnode_endpoint vep = { { 0 } };
int ret;
ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(node), &vep);
if (ret) {
dev_err(stfcamss->dev, "endpoint not defined at %pOF\n", node);
return ret;
}
csd->port = vep.base.port;
return 0;
}
static int stfcamss_of_parse_ports(struct stfcamss *stfcamss)
{
struct device_node *node = NULL;
int ret, num_subdevs = 0;
for_each_endpoint_of_node(stfcamss->dev->of_node, node) {
struct stfcamss_async_subdev *csd;
if (!of_device_is_available(node))
continue;
csd = v4l2_async_nf_add_fwnode_remote(&stfcamss->notifier,
of_fwnode_handle(node),
struct stfcamss_async_subdev);
if (IS_ERR(csd)) {
ret = PTR_ERR(csd);
dev_err(stfcamss->dev, "failed to add async notifier\n");
goto err_cleanup;
}
ret = stfcamss_of_parse_endpoint_node(stfcamss, node, csd);
if (ret)
goto err_cleanup;
num_subdevs++;
}
return num_subdevs;
err_cleanup:
of_node_put(node);
return ret;
}
static int stfcamss_register_devs(struct stfcamss *stfcamss)
{
struct stf_capture *cap_yuv = &stfcamss->captures[STF_CAPTURE_YUV];
struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;
int ret;
ret = stf_isp_register(isp_dev, &stfcamss->v4l2_dev);
if (ret < 0) {
dev_err(stfcamss->dev,
"failed to register stf isp%d entity: %d\n", 0, ret);
return ret;
}
ret = stf_capture_register(stfcamss, &stfcamss->v4l2_dev);
if (ret < 0) {
dev_err(stfcamss->dev,
"failed to register capture: %d\n", ret);
goto err_isp_unregister;
}
ret = media_create_pad_link(&isp_dev->subdev.entity, STF_ISP_PAD_SRC,
&cap_yuv->video.vdev.entity, 0, 0);
if (ret)
goto err_cap_unregister;
cap_yuv->video.source_subdev = &isp_dev->subdev;
return ret;
err_cap_unregister:
stf_capture_unregister(stfcamss);
err_isp_unregister:
stf_isp_unregister(&stfcamss->isp_dev);
return ret;
}
static void stfcamss_unregister_devs(struct stfcamss *stfcamss)
{
struct stf_capture *cap_yuv = &stfcamss->captures[STF_CAPTURE_YUV];
struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;
media_entity_remove_links(&isp_dev->subdev.entity);
media_entity_remove_links(&cap_yuv->video.vdev.entity);
stf_isp_unregister(&stfcamss->isp_dev);
stf_capture_unregister(stfcamss);
}
static int stfcamss_subdev_notifier_bound(struct v4l2_async_notifier *async,
struct v4l2_subdev *subdev,
struct v4l2_async_connection *asc)
{
struct stfcamss *stfcamss =
container_of(async, struct stfcamss, notifier);
struct stfcamss_async_subdev *csd =
container_of(asc, struct stfcamss_async_subdev, asd);
enum stf_port_num port = csd->port;
struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;
struct stf_capture *cap_raw = &stfcamss->captures[STF_CAPTURE_RAW];
struct media_pad *pad;
int ret;
if (port == STF_PORT_CSI2RX) {
pad = &isp_dev->pads[STF_ISP_PAD_SINK];
} else {
dev_err(stfcamss->dev, "not support port %d\n", port);
return -EPERM;
}
ret = v4l2_create_fwnode_links_to_pad(subdev, pad, 0);
if (ret)
return ret;
ret = media_create_pad_link(&subdev->entity, 1,
&cap_raw->video.vdev.entity, 0, 0);
if (ret)
return ret;
isp_dev->source_subdev = subdev;
cap_raw->video.source_subdev = subdev;
return 0;
}
static int stfcamss_subdev_notifier_complete(struct v4l2_async_notifier *ntf)
{
struct stfcamss *stfcamss =
container_of(ntf, struct stfcamss, notifier);
return v4l2_device_register_subdev_nodes(&stfcamss->v4l2_dev);
}
static const struct v4l2_async_notifier_operations
stfcamss_subdev_notifier_ops = {
.bound = stfcamss_subdev_notifier_bound,
.complete = stfcamss_subdev_notifier_complete,
};
static void stfcamss_mc_init(struct platform_device *pdev,
struct stfcamss *stfcamss)
{
stfcamss->media_dev.dev = stfcamss->dev;
strscpy(stfcamss->media_dev.model, "Starfive Camera Subsystem",
sizeof(stfcamss->media_dev.model));
media_device_init(&stfcamss->media_dev);
stfcamss->v4l2_dev.mdev = &stfcamss->media_dev;
}
static int stfcamss_probe(struct platform_device *pdev)
{
struct stfcamss *stfcamss;
struct device *dev = &pdev->dev;
int ret, num_subdevs;
unsigned int i;
stfcamss = devm_kzalloc(dev, sizeof(*stfcamss), GFP_KERNEL);
if (!stfcamss)
return -ENOMEM;
stfcamss->dev = dev;
for (i = 0; i < ARRAY_SIZE(stf_isrs); ++i) {
int irq;
irq = platform_get_irq(pdev, i);
if (irq < 0)
return irq;
ret = devm_request_irq(stfcamss->dev, irq, stf_isrs[i].isr, 0,
stf_isrs[i].name, stfcamss);
if (ret) {
dev_err(dev, "request irq failed: %d\n", ret);
return ret;
}
}
stfcamss->nclks = ARRAY_SIZE(stfcamss->sys_clk);
for (i = 0; i < stfcamss->nclks; ++i)
stfcamss->sys_clk[i].id = stfcamss_clocks[i];
ret = devm_clk_bulk_get(dev, stfcamss->nclks, stfcamss->sys_clk);
if (ret) {
dev_err(dev, "Failed to get clk controls\n");
return ret;
}
stfcamss->nrsts = ARRAY_SIZE(stfcamss->sys_rst);
for (i = 0; i < stfcamss->nrsts; ++i)
stfcamss->sys_rst[i].id = stfcamss_resets[i];
ret = devm_reset_control_bulk_get_shared(dev, stfcamss->nrsts,
stfcamss->sys_rst);
if (ret) {
dev_err(dev, "Failed to get reset controls\n");
return ret;
}
ret = stfcamss_get_mem_res(stfcamss);
if (ret) {
dev_err(dev, "Could not map registers\n");
return ret;
}
platform_set_drvdata(pdev, stfcamss);
v4l2_async_nf_init(&stfcamss->notifier, &stfcamss->v4l2_dev);
num_subdevs = stfcamss_of_parse_ports(stfcamss);
if (num_subdevs < 0) {
ret = -ENODEV;
dev_err(dev, "Failed to get sub devices: %d\n", ret);
goto err_cleanup_notifier;
}
ret = stf_isp_init(stfcamss);
if (ret < 0) {
dev_err(dev, "Failed to init isp: %d\n", ret);
goto err_cleanup_notifier;
}
stfcamss_mc_init(pdev, stfcamss);
ret = v4l2_device_register(stfcamss->dev, &stfcamss->v4l2_dev);
if (ret < 0) {
dev_err(dev, "Failed to register V4L2 device: %d\n", ret);
goto err_cleanup_media_device;
}
ret = media_device_register(&stfcamss->media_dev);
if (ret) {
dev_err(dev, "Failed to register media device: %d\n", ret);
goto err_unregister_device;
}
ret = stfcamss_register_devs(stfcamss);
if (ret < 0) {
dev_err(dev, "Failed to register subdevice: %d\n", ret);
goto err_unregister_media_dev;
}
pm_runtime_enable(dev);
stfcamss->notifier.ops = &stfcamss_subdev_notifier_ops;
ret = v4l2_async_nf_register(&stfcamss->notifier);
if (ret) {
dev_err(dev, "Failed to register async subdev nodes: %d\n",
ret);
pm_runtime_disable(dev);
goto err_unregister_subdevs;
}
return 0;
err_unregister_subdevs:
stfcamss_unregister_devs(stfcamss);
err_unregister_media_dev:
media_device_unregister(&stfcamss->media_dev);
err_unregister_device:
v4l2_device_unregister(&stfcamss->v4l2_dev);
err_cleanup_media_device:
media_device_cleanup(&stfcamss->media_dev);
err_cleanup_notifier:
v4l2_async_nf_cleanup(&stfcamss->notifier);
return ret;
}
static void stfcamss_remove(struct platform_device *pdev)
{
struct stfcamss *stfcamss = platform_get_drvdata(pdev);
stfcamss_unregister_devs(stfcamss);
v4l2_device_unregister(&stfcamss->v4l2_dev);
media_device_cleanup(&stfcamss->media_dev);
v4l2_async_nf_cleanup(&stfcamss->notifier);
pm_runtime_disable(&pdev->dev);
}
static const struct of_device_id stfcamss_of_match[] = {
{ .compatible = "starfive,jh7110-camss" },
{ },
};
MODULE_DEVICE_TABLE(of, stfcamss_of_match);
static int __maybe_unused stfcamss_runtime_suspend(struct device *dev)
{
struct stfcamss *stfcamss = dev_get_drvdata(dev);
int ret;
ret = reset_control_bulk_assert(stfcamss->nrsts, stfcamss->sys_rst);
if (ret) {
dev_err(dev, "reset assert failed\n");
return ret;
}
clk_bulk_disable_unprepare(stfcamss->nclks, stfcamss->sys_clk);
return 0;
}
static int __maybe_unused stfcamss_runtime_resume(struct device *dev)
{
struct stfcamss *stfcamss = dev_get_drvdata(dev);
int ret;
ret = clk_bulk_prepare_enable(stfcamss->nclks, stfcamss->sys_clk);
if (ret) {
dev_err(dev, "clock prepare enable failed\n");
return ret;
}
ret = reset_control_bulk_deassert(stfcamss->nrsts, stfcamss->sys_rst);
if (ret < 0) {
dev_err(dev, "cannot deassert resets\n");
clk_bulk_disable_unprepare(stfcamss->nclks, stfcamss->sys_clk);
return ret;
}
return 0;
}
static const struct dev_pm_ops stfcamss_pm_ops = {
SET_RUNTIME_PM_OPS(stfcamss_runtime_suspend,
stfcamss_runtime_resume,
NULL)
};
static struct platform_driver stfcamss_driver = {
.probe = stfcamss_probe,
.remove = stfcamss_remove,
.driver = {
.name = "starfive-camss",
.pm = &stfcamss_pm_ops,
.of_match_table = stfcamss_of_match,
},
};
module_platform_driver(stfcamss_driver);
MODULE_AUTHOR("Jack Zhu <jack.zhu@starfivetech.com>");
MODULE_AUTHOR("Changhuang Liang <changhuang.liang@starfivetech.com>");
MODULE_DESCRIPTION("StarFive Camera Subsystem driver");
MODULE_LICENSE("GPL");
