| // 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"); |
