/* * Driver for Renesas R-Car VIN * * Copyright (C) 2016 Renesas Electronics Corp. * Copyright (C) 2011-2013 Renesas Solutions Corp. * Copyright (C) 2013 Cogent Embedded, Inc., * Copyright (C) 2008 Magnus Damm * * Based on the soc-camera rcar_vin driver * * 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 2 of the License, or (at your * option) any later version. */ #include #include #include #include #include #include #include #include "rcar-vin.h" /* ----------------------------------------------------------------------------- * Async notifier */ #define notifier_to_vin(n) container_of(n, struct rvin_dev, notifier) static int rvin_find_pad(struct v4l2_subdev *sd, int direction) { unsigned int pad; if (sd->entity.num_pads <= 1) return 0; for (pad = 0; pad < sd->entity.num_pads; pad++) if (sd->entity.pads[pad].flags & direction) return pad; return -EINVAL; } static bool rvin_mbus_supported(struct rvin_graph_entity *entity) { struct v4l2_subdev *sd = entity->subdev; struct v4l2_subdev_mbus_code_enum code = { .which = V4L2_SUBDEV_FORMAT_ACTIVE, }; code.index = 0; code.pad = entity->source_pad; while (!v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &code)) { code.index++; switch (code.code) { case MEDIA_BUS_FMT_YUYV8_1X16: case MEDIA_BUS_FMT_UYVY8_2X8: case MEDIA_BUS_FMT_UYVY10_2X10: case MEDIA_BUS_FMT_RGB888_1X24: entity->code = code.code; return true; default: break; } } return false; } static int rvin_digital_notify_complete(struct v4l2_async_notifier *notifier) { struct rvin_dev *vin = notifier_to_vin(notifier); int ret; /* Verify subdevices mbus format */ if (!rvin_mbus_supported(&vin->digital)) { vin_err(vin, "Unsupported media bus format for %s\n", vin->digital.subdev->name); return -EINVAL; } vin_dbg(vin, "Found media bus format for %s: %d\n", vin->digital.subdev->name, vin->digital.code); ret = v4l2_device_register_subdev_nodes(&vin->v4l2_dev); if (ret < 0) { vin_err(vin, "Failed to register subdev nodes\n"); return ret; } return rvin_v4l2_probe(vin); } static void rvin_digital_notify_unbind(struct v4l2_async_notifier *notifier, struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd) { struct rvin_dev *vin = notifier_to_vin(notifier); vin_dbg(vin, "unbind digital subdev %s\n", subdev->name); rvin_v4l2_remove(vin); vin->digital.subdev = NULL; } static int rvin_digital_notify_bound(struct v4l2_async_notifier *notifier, struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd) { struct rvin_dev *vin = notifier_to_vin(notifier); int ret; v4l2_set_subdev_hostdata(subdev, vin); /* Find source and sink pad of remote subdevice */ ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SOURCE); if (ret < 0) return ret; vin->digital.source_pad = ret; ret = rvin_find_pad(subdev, MEDIA_PAD_FL_SINK); vin->digital.sink_pad = ret < 0 ? 0 : ret; vin->digital.subdev = subdev; vin_dbg(vin, "bound subdev %s source pad: %u sink pad: %u\n", subdev->name, vin->digital.source_pad, vin->digital.sink_pad); return 0; } static int rvin_digitial_parse_v4l2(struct rvin_dev *vin, struct device_node *ep, struct v4l2_mbus_config *mbus_cfg) { struct v4l2_fwnode_endpoint v4l2_ep; int ret; ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &v4l2_ep); if (ret) { vin_err(vin, "Could not parse v4l2 endpoint\n"); return -EINVAL; } mbus_cfg->type = v4l2_ep.bus_type; switch (mbus_cfg->type) { case V4L2_MBUS_PARALLEL: vin_dbg(vin, "Found PARALLEL media bus\n"); mbus_cfg->flags = v4l2_ep.bus.parallel.flags; break; case V4L2_MBUS_BT656: vin_dbg(vin, "Found BT656 media bus\n"); mbus_cfg->flags = 0; break; default: vin_err(vin, "Unknown media bus type\n"); return -EINVAL; } return 0; } static int rvin_digital_graph_parse(struct rvin_dev *vin) { struct device_node *ep, *np; int ret; vin->digital.asd.match.fwnode.fwnode = NULL; vin->digital.subdev = NULL; /* * Port 0 id 0 is local digital input, try to get it. * Not all instances can or will have this, that is OK */ ep = of_graph_get_endpoint_by_regs(vin->dev->of_node, 0, 0); if (!ep) return 0; np = of_graph_get_remote_port_parent(ep); if (!np) { vin_err(vin, "No remote parent for digital input\n"); of_node_put(ep); return -EINVAL; } of_node_put(np); ret = rvin_digitial_parse_v4l2(vin, ep, &vin->digital.mbus_cfg); of_node_put(ep); if (ret) return ret; vin->digital.asd.match.fwnode.fwnode = of_fwnode_handle(np); vin->digital.asd.match_type = V4L2_ASYNC_MATCH_FWNODE; return 0; } static int rvin_digital_graph_init(struct rvin_dev *vin) { struct v4l2_async_subdev **subdevs = NULL; int ret; ret = rvin_digital_graph_parse(vin); if (ret) return ret; if (!vin->digital.asd.match.fwnode.fwnode) { vin_dbg(vin, "No digital subdevice found\n"); return -ENODEV; } /* Register the subdevices notifier. */ subdevs = devm_kzalloc(vin->dev, sizeof(*subdevs), GFP_KERNEL); if (subdevs == NULL) return -ENOMEM; subdevs[0] = &vin->digital.asd; vin_dbg(vin, "Found digital subdevice %pOF\n", to_of_node(subdevs[0]->match.fwnode.fwnode)); vin->notifier.num_subdevs = 1; vin->notifier.subdevs = subdevs; vin->notifier.bound = rvin_digital_notify_bound; vin->notifier.unbind = rvin_digital_notify_unbind; vin->notifier.complete = rvin_digital_notify_complete; ret = v4l2_async_notifier_register(&vin->v4l2_dev, &vin->notifier); if (ret < 0) { vin_err(vin, "Notifier registration failed\n"); return ret; } return 0; } /* ----------------------------------------------------------------------------- * Platform Device Driver */ static const struct of_device_id rvin_of_id_table[] = { { .compatible = "renesas,vin-r8a7794", .data = (void *)RCAR_GEN2 }, { .compatible = "renesas,vin-r8a7793", .data = (void *)RCAR_GEN2 }, { .compatible = "renesas,vin-r8a7791", .data = (void *)RCAR_GEN2 }, { .compatible = "renesas,vin-r8a7790", .data = (void *)RCAR_GEN2 }, { .compatible = "renesas,vin-r8a7779", .data = (void *)RCAR_H1 }, { .compatible = "renesas,vin-r8a7778", .data = (void *)RCAR_M1 }, { .compatible = "renesas,rcar-gen2-vin", .data = (void *)RCAR_GEN2 }, { }, }; MODULE_DEVICE_TABLE(of, rvin_of_id_table); static int rcar_vin_probe(struct platform_device *pdev) { const struct of_device_id *match; struct rvin_dev *vin; struct resource *mem; int irq, ret; vin = devm_kzalloc(&pdev->dev, sizeof(*vin), GFP_KERNEL); if (!vin) return -ENOMEM; match = of_match_device(of_match_ptr(rvin_of_id_table), &pdev->dev); if (!match) return -ENODEV; vin->dev = &pdev->dev; vin->chip = (enum chip_id)match->data; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (mem == NULL) return -EINVAL; vin->base = devm_ioremap_resource(vin->dev, mem); if (IS_ERR(vin->base)) return PTR_ERR(vin->base); irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; ret = rvin_dma_probe(vin, irq); if (ret) return ret; ret = rvin_digital_graph_init(vin); if (ret < 0) goto error; pm_suspend_ignore_children(&pdev->dev, true); pm_runtime_enable(&pdev->dev); platform_set_drvdata(pdev, vin); return 0; error: rvin_dma_remove(vin); return ret; } static int rcar_vin_remove(struct platform_device *pdev) { struct rvin_dev *vin = platform_get_drvdata(pdev); pm_runtime_disable(&pdev->dev); v4l2_async_notifier_unregister(&vin->notifier); rvin_dma_remove(vin); return 0; } static struct platform_driver rcar_vin_driver = { .driver = { .name = "rcar-vin", .of_match_table = rvin_of_id_table, }, .probe = rcar_vin_probe, .remove = rcar_vin_remove, }; module_platform_driver(rcar_vin_driver); MODULE_AUTHOR("Niklas Söderlund "); MODULE_DESCRIPTION("Renesas R-Car VIN camera host driver"); MODULE_LICENSE("GPL v2");