1 files changed, 421 insertions, 0 deletions

diff --git a/drivers/media/platform/amlogic/c3/isp/c3-isp-dev.c b/drivers/media/platform/amlogic/c3/isp/c3-isp-dev.c
new file mode 100644
index 000000000000..c3b779f63088
--- /dev/null
+++ b/drivers/media/platform/amlogic/c3/isp/c3-isp-dev.c
@@ -0,0 +1,421 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
+/*
+ * Copyright (C) 2024 Amlogic, Inc. All rights reserved
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-mc.h>
+
+#include "c3-isp-common.h"
+#include "c3-isp-regs.h"
+
+u32 c3_isp_read(struct c3_isp_device *isp, u32 reg)
+{
+	return readl(isp->base + reg);
+}
+
+void c3_isp_write(struct c3_isp_device *isp, u32 reg, u32 val)
+{
+	writel(val, isp->base + reg);
+}
+
+void c3_isp_update_bits(struct c3_isp_device *isp, u32 reg, u32 mask, u32 val)
+{
+	u32 orig, tmp;
+
+	orig = c3_isp_read(isp, reg);
+
+	tmp = orig & ~mask;
+	tmp |= val & mask;
+
+	if (tmp != orig)
+		c3_isp_write(isp, reg, tmp);
+}
+
+/* PM runtime suspend */
+static int c3_isp_runtime_suspend(struct device *dev)
+{
+	struct c3_isp_device *isp = dev_get_drvdata(dev);
+
+	clk_bulk_disable_unprepare(isp->info->clock_num, isp->clks);
+
+	return 0;
+}
+
+/* PM runtime resume */
+static int c3_isp_runtime_resume(struct device *dev)
+{
+	struct c3_isp_device *isp = dev_get_drvdata(dev);
+
+	return clk_bulk_prepare_enable(isp->info->clock_num, isp->clks);
+}
+
+static const struct dev_pm_ops c3_isp_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+			    pm_runtime_force_resume)
+	RUNTIME_PM_OPS(c3_isp_runtime_suspend,
+		       c3_isp_runtime_resume, NULL)
+};
+
+/* IRQ handling */
+static irqreturn_t c3_isp_irq_handler(int irq, void *dev)
+{
+	struct c3_isp_device *isp = dev;
+	u32 status;
+
+	/* Get irq status and clear irq status */
+	status = c3_isp_read(isp, ISP_TOP_RO_IRQ_STAT);
+	c3_isp_write(isp, ISP_TOP_IRQ_CLR, status);
+
+	if (status & ISP_TOP_RO_IRQ_STAT_FRM_END_MASK) {
+		c3_isp_stats_isr(isp);
+		c3_isp_params_isr(isp);
+		c3_isp_captures_isr(isp);
+		isp->frm_sequence++;
+	}
+
+	if (status & ISP_TOP_RO_IRQ_STAT_FRM_RST_MASK)
+		c3_isp_core_queue_sof(isp);
+
+	return IRQ_HANDLED;
+}
+
+/* Subdev notifier register */
+static int c3_isp_notify_bound(struct v4l2_async_notifier *notifier,
+			       struct v4l2_subdev *sd,
+			       struct v4l2_async_connection *asc)
+{
+	struct c3_isp_device *isp =
+		container_of(notifier, struct c3_isp_device, notifier);
+	struct media_pad *sink =
+		&isp->core.sd.entity.pads[C3_ISP_CORE_PAD_SINK_VIDEO];
+
+	return v4l2_create_fwnode_links_to_pad(sd, sink, MEDIA_LNK_FL_ENABLED |
+					       MEDIA_LNK_FL_IMMUTABLE);
+}
+
+static int c3_isp_notify_complete(struct v4l2_async_notifier *notifier)
+{
+	struct c3_isp_device *isp =
+		container_of(notifier, struct c3_isp_device, notifier);
+
+	return v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
+}
+
+static const struct v4l2_async_notifier_operations c3_isp_notify_ops = {
+	.bound = c3_isp_notify_bound,
+	.complete = c3_isp_notify_complete,
+};
+
+static int c3_isp_async_nf_register(struct c3_isp_device *isp)
+{
+	struct v4l2_async_connection *asc;
+	struct fwnode_handle *ep;
+	int ret;
+
+	v4l2_async_nf_init(&isp->notifier, &isp->v4l2_dev);
+
+	ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(isp->dev), 0, 0,
+					     FWNODE_GRAPH_ENDPOINT_NEXT);
+	if (!ep)
+		return -ENOTCONN;
+
+	asc = v4l2_async_nf_add_fwnode_remote(&isp->notifier, ep,
+					      struct v4l2_async_connection);
+	fwnode_handle_put(ep);
+
+	if (IS_ERR(asc))
+		return PTR_ERR(asc);
+
+	isp->notifier.ops = &c3_isp_notify_ops;
+	ret = v4l2_async_nf_register(&isp->notifier);
+	if (ret)
+		v4l2_async_nf_cleanup(&isp->notifier);
+
+	return ret;
+}
+
+static void c3_isp_async_nf_unregister(struct c3_isp_device *isp)
+{
+	v4l2_async_nf_unregister(&isp->notifier);
+	v4l2_async_nf_cleanup(&isp->notifier);
+}
+
+static int c3_isp_media_register(struct c3_isp_device *isp)
+{
+	struct media_device *media_dev = &isp->media_dev;
+	struct v4l2_device *v4l2_dev = &isp->v4l2_dev;
+	int ret;
+
+	/* Initialize media device */
+	strscpy(media_dev->model, C3_ISP_DRIVER_NAME, sizeof(media_dev->model));
+	media_dev->dev = isp->dev;
+
+	media_device_init(media_dev);
+
+	/* Initialize v4l2 device */
+	v4l2_dev->mdev = media_dev;
+	strscpy(v4l2_dev->name, C3_ISP_DRIVER_NAME, sizeof(v4l2_dev->name));
+
+	ret = v4l2_device_register(isp->dev, v4l2_dev);
+	if (ret)
+		goto err_media_dev_cleanup;
+
+	ret = media_device_register(&isp->media_dev);
+	if (ret) {
+		dev_err(isp->dev, "Failed to register media device: %d\n", ret);
+		goto err_unreg_v4l2_dev;
+	}
+
+	return 0;
+
+err_unreg_v4l2_dev:
+	v4l2_device_unregister(&isp->v4l2_dev);
+err_media_dev_cleanup:
+	media_device_cleanup(media_dev);
+	return ret;
+}
+
+static void c3_isp_media_unregister(struct c3_isp_device *isp)
+{
+	media_device_unregister(&isp->media_dev);
+	v4l2_device_unregister(&isp->v4l2_dev);
+	media_device_cleanup(&isp->media_dev);
+}
+
+static void c3_isp_remove_links(struct c3_isp_device *isp)
+{
+	unsigned int i;
+
+	media_entity_remove_links(&isp->core.sd.entity);
+
+	for (i = 0; i < C3_ISP_NUM_RSZ; i++)
+		media_entity_remove_links(&isp->resizers[i].sd.entity);
+
+	for (i = 0; i < C3_ISP_NUM_CAP_DEVS; i++)
+		media_entity_remove_links(&isp->caps[i].vdev.entity);
+}
+
+static int c3_isp_create_links(struct c3_isp_device *isp)
+{
+	unsigned int i;
+	int ret;
+
+	for (i = 0; i < C3_ISP_NUM_RSZ; i++) {
+		ret = media_create_pad_link(&isp->resizers[i].sd.entity,
+					    C3_ISP_RSZ_PAD_SOURCE,
+					    &isp->caps[i].vdev.entity, 0,
+					    MEDIA_LNK_FL_ENABLED |
+					    MEDIA_LNK_FL_IMMUTABLE);
+		if (ret) {
+			dev_err(isp->dev,
+				"Failed to link rsz %u and cap %u\n", i, i);
+			goto err_remove_links;
+		}
+
+		ret = media_create_pad_link(&isp->core.sd.entity,
+					    C3_ISP_CORE_PAD_SOURCE_VIDEO_0 + i,
+					    &isp->resizers[i].sd.entity,
+					    C3_ISP_RSZ_PAD_SINK,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret) {
+			dev_err(isp->dev,
+				"Failed to link core and rsz %u\n", i);
+			goto err_remove_links;
+		}
+	}
+
+	ret = media_create_pad_link(&isp->core.sd.entity,
+				    C3_ISP_CORE_PAD_SOURCE_STATS,
+				    &isp->stats.vdev.entity,
+				    0, MEDIA_LNK_FL_ENABLED);
+	if (ret) {
+		dev_err(isp->dev, "Failed to link core and stats\n");
+		goto err_remove_links;
+	}
+
+	ret = media_create_pad_link(&isp->params.vdev.entity, 0,
+				    &isp->core.sd.entity,
+				    C3_ISP_CORE_PAD_SINK_PARAMS,
+				    MEDIA_LNK_FL_ENABLED);
+	if (ret) {
+		dev_err(isp->dev, "Failed to link params and core\n");
+		goto err_remove_links;
+	}
+
+	return 0;
+
+err_remove_links:
+	c3_isp_remove_links(isp);
+	return ret;
+}
+
+static int c3_isp_videos_register(struct c3_isp_device *isp)
+{
+	int ret;
+
+	ret = c3_isp_captures_register(isp);
+	if (ret)
+		return ret;
+
+	ret = c3_isp_stats_register(isp);
+	if (ret)
+		goto err_captures_unregister;
+
+	ret = c3_isp_params_register(isp);
+	if (ret)
+		goto err_stats_unregister;
+
+	ret = c3_isp_create_links(isp);
+	if (ret)
+		goto err_params_unregister;
+
+	return 0;
+
+err_params_unregister:
+	c3_isp_params_unregister(isp);
+err_stats_unregister:
+	c3_isp_stats_unregister(isp);
+err_captures_unregister:
+	c3_isp_captures_unregister(isp);
+	return ret;
+}
+
+static void c3_isp_videos_unregister(struct c3_isp_device *isp)
+{
+	c3_isp_remove_links(isp);
+	c3_isp_params_unregister(isp);
+	c3_isp_stats_unregister(isp);
+	c3_isp_captures_unregister(isp);
+}
+
+static int c3_isp_get_clocks(struct c3_isp_device *isp)
+{
+	const struct c3_isp_info *info = isp->info;
+
+	for (unsigned int i = 0; i < info->clock_num; i++)
+		isp->clks[i].id = info->clocks[i];
+
+	return devm_clk_bulk_get(isp->dev, info->clock_num, isp->clks);
+}
+
+static int c3_isp_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct c3_isp_device *isp;
+	int irq;
+	int ret;
+
+	isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
+	if (!isp)
+		return -ENOMEM;
+
+	isp->info = of_device_get_match_data(dev);
+	isp->dev = dev;
+
+	isp->base = devm_platform_ioremap_resource_byname(pdev, "isp");
+	if (IS_ERR(isp->base))
+		return dev_err_probe(dev, PTR_ERR(isp->base),
+				     "Failed to ioremap resource\n");
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = c3_isp_get_clocks(isp);
+	if (ret)
+		return dev_err_probe(dev, ret, "Failed to get clocks\n");
+
+	platform_set_drvdata(pdev, isp);
+
+	pm_runtime_enable(dev);
+
+	ret = c3_isp_media_register(isp);
+	if (ret)
+		goto err_runtime_disable;
+
+	ret = c3_isp_core_register(isp);
+	if (ret)
+		goto err_v4l2_unregister;
+
+	ret = c3_isp_resizers_register(isp);
+	if (ret)
+		goto err_core_unregister;
+
+	ret = c3_isp_async_nf_register(isp);
+	if (ret)
+		goto err_resizers_unregister;
+
+	ret = devm_request_irq(dev, irq,
+			       c3_isp_irq_handler, IRQF_SHARED,
+			       dev_driver_string(dev), isp);
+	if (ret)
+		goto err_nf_unregister;
+
+	ret = c3_isp_videos_register(isp);
+	if (ret)
+		goto err_nf_unregister;
+
+	return 0;
+
+err_nf_unregister:
+	c3_isp_async_nf_unregister(isp);
+err_resizers_unregister:
+	c3_isp_resizers_unregister(isp);
+err_core_unregister:
+	c3_isp_core_unregister(isp);
+err_v4l2_unregister:
+	c3_isp_media_unregister(isp);
+err_runtime_disable:
+	pm_runtime_disable(dev);
+	return ret;
+};
+
+static void c3_isp_remove(struct platform_device *pdev)
+{
+	struct c3_isp_device *isp = platform_get_drvdata(pdev);
+
+	c3_isp_videos_unregister(isp);
+	c3_isp_async_nf_unregister(isp);
+	c3_isp_core_unregister(isp);
+	c3_isp_resizers_unregister(isp);
+	c3_isp_media_unregister(isp);
+	pm_runtime_disable(isp->dev);
+};
+
+static const struct c3_isp_info isp_info = {
+	.clocks = {"vapb", "isp0"},
+	.clock_num = 2
+};
+
+static const struct of_device_id c3_isp_of_match[] = {
+	{ .compatible = "amlogic,c3-isp",
+	  .data = &isp_info },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, c3_isp_of_match);
+
+static struct platform_driver c3_isp_driver = {
+	.probe = c3_isp_probe,
+	.remove = c3_isp_remove,
+	.driver = {
+		.name = "c3-isp",
+		.of_match_table = c3_isp_of_match,
+		.pm = pm_ptr(&c3_isp_pm_ops),
+	},
+};
+
+module_platform_driver(c3_isp_driver);
+
+MODULE_AUTHOR("Keke Li <keke.li@amlogic.com>");
+MODULE_DESCRIPTION("Amlogic C3 ISP pipeline");
+MODULE_LICENSE("GPL");