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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Driver for Renesas RZ/G2L CRU4 *5 * Copyright (C) 2022 Renesas Electronics Corp.6 *7 * Based on Renesas R-Car VIN8 * Copyright (C) 2011-2013 Renesas Solutions Corp.9 * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>10 * Copyright (C) 2008 Magnus Damm11 */12 13#include <linux/clk.h>14#include <linux/module.h>15#include <linux/mod_devicetable.h>16#include <linux/of.h>17#include <linux/of_graph.h>18#include <linux/platform_device.h>19#include <linux/pm_runtime.h>20 21#include <media/v4l2-fwnode.h>22#include <media/v4l2-mc.h>23 24#include "rzg2l-cru.h"25 26static inline struct rzg2l_cru_dev *notifier_to_cru(struct v4l2_async_notifier *n)27{28 return container_of(n, struct rzg2l_cru_dev, notifier);29}30 31static const struct media_device_ops rzg2l_cru_media_ops = {32 .link_notify = v4l2_pipeline_link_notify,33};34 35/* -----------------------------------------------------------------------------36 * Group async notifier37 */38 39static int rzg2l_cru_group_notify_complete(struct v4l2_async_notifier *notifier)40{41 struct rzg2l_cru_dev *cru = notifier_to_cru(notifier);42 struct media_entity *source, *sink;43 int ret;44 45 ret = rzg2l_cru_ip_subdev_register(cru);46 if (ret)47 return ret;48 49 ret = v4l2_device_register_subdev_nodes(&cru->v4l2_dev);50 if (ret) {51 dev_err(cru->dev, "Failed to register subdev nodes\n");52 return ret;53 }54 55 ret = rzg2l_cru_video_register(cru);56 if (ret)57 return ret;58 59 /*60 * CRU can be connected either to CSI2 or PARALLEL device61 * For now we are only supporting CSI262 *63 * Create media device link between CSI-2 <-> CRU IP64 */65 source = &cru->csi.subdev->entity;66 sink = &cru->ip.subdev.entity;67 ret = media_create_pad_link(source, 1, sink, 0,68 MEDIA_LNK_FL_ENABLED |69 MEDIA_LNK_FL_IMMUTABLE);70 if (ret) {71 dev_err(cru->dev, "Error creating link from %s to %s\n",72 source->name, sink->name);73 return ret;74 }75 cru->csi.channel = 0;76 cru->ip.remote = cru->csi.subdev;77 78 /* Create media device link between CRU IP <-> CRU OUTPUT */79 source = &cru->ip.subdev.entity;80 sink = &cru->vdev.entity;81 ret = media_create_pad_link(source, 1, sink, 0,82 MEDIA_LNK_FL_ENABLED |83 MEDIA_LNK_FL_IMMUTABLE);84 if (ret) {85 dev_err(cru->dev, "Error creating link from %s to %s\n",86 source->name, sink->name);87 return ret;88 }89 90 return 0;91}92 93static void rzg2l_cru_group_notify_unbind(struct v4l2_async_notifier *notifier,94 struct v4l2_subdev *subdev,95 struct v4l2_async_connection *asd)96{97 struct rzg2l_cru_dev *cru = notifier_to_cru(notifier);98 99 rzg2l_cru_ip_subdev_unregister(cru);100 101 mutex_lock(&cru->mdev_lock);102 103 if (cru->csi.asd == asd) {104 cru->csi.subdev = NULL;105 dev_dbg(cru->dev, "Unbind CSI-2 %s\n", subdev->name);106 }107 108 mutex_unlock(&cru->mdev_lock);109}110 111static int rzg2l_cru_group_notify_bound(struct v4l2_async_notifier *notifier,112 struct v4l2_subdev *subdev,113 struct v4l2_async_connection *asd)114{115 struct rzg2l_cru_dev *cru = notifier_to_cru(notifier);116 117 mutex_lock(&cru->mdev_lock);118 119 if (cru->csi.asd == asd) {120 cru->csi.subdev = subdev;121 dev_dbg(cru->dev, "Bound CSI-2 %s\n", subdev->name);122 }123 124 mutex_unlock(&cru->mdev_lock);125 126 return 0;127}128 129static const struct v4l2_async_notifier_operations rzg2l_cru_async_ops = {130 .bound = rzg2l_cru_group_notify_bound,131 .unbind = rzg2l_cru_group_notify_unbind,132 .complete = rzg2l_cru_group_notify_complete,133};134 135static int rzg2l_cru_mc_parse_of(struct rzg2l_cru_dev *cru)136{137 struct v4l2_fwnode_endpoint vep = {138 .bus_type = V4L2_MBUS_CSI2_DPHY,139 };140 struct fwnode_handle *ep, *fwnode;141 struct v4l2_async_connection *asd;142 int ret;143 144 ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(cru->dev), 1, 0, 0);145 if (!ep)146 return 0;147 148 fwnode = fwnode_graph_get_remote_endpoint(ep);149 ret = v4l2_fwnode_endpoint_parse(ep, &vep);150 fwnode_handle_put(ep);151 if (ret) {152 dev_err(cru->dev, "Failed to parse %pOF\n", to_of_node(fwnode));153 ret = -EINVAL;154 goto out;155 }156 157 if (!of_device_is_available(to_of_node(fwnode))) {158 dev_dbg(cru->dev, "OF device %pOF disabled, ignoring\n",159 to_of_node(fwnode));160 ret = -ENOTCONN;161 goto out;162 }163 164 asd = v4l2_async_nf_add_fwnode(&cru->notifier, fwnode,165 struct v4l2_async_connection);166 if (IS_ERR(asd)) {167 ret = PTR_ERR(asd);168 goto out;169 }170 171 cru->csi.asd = asd;172 173 dev_dbg(cru->dev, "Added OF device %pOF to slot %u\n",174 to_of_node(fwnode), vep.base.id);175out:176 fwnode_handle_put(fwnode);177 178 return ret;179}180 181static int rzg2l_cru_mc_parse_of_graph(struct rzg2l_cru_dev *cru)182{183 int ret;184 185 v4l2_async_nf_init(&cru->notifier, &cru->v4l2_dev);186 187 ret = rzg2l_cru_mc_parse_of(cru);188 if (ret)189 return ret;190 191 cru->notifier.ops = &rzg2l_cru_async_ops;192 193 if (list_empty(&cru->notifier.waiting_list))194 return 0;195 196 ret = v4l2_async_nf_register(&cru->notifier);197 if (ret < 0) {198 dev_err(cru->dev, "Notifier registration failed\n");199 v4l2_async_nf_cleanup(&cru->notifier);200 return ret;201 }202 203 return 0;204}205 206static int rzg2l_cru_media_init(struct rzg2l_cru_dev *cru)207{208 struct media_device *mdev = NULL;209 const struct of_device_id *match;210 int ret;211 212 cru->pad.flags = MEDIA_PAD_FL_SINK;213 ret = media_entity_pads_init(&cru->vdev.entity, 1, &cru->pad);214 if (ret)215 return ret;216 217 mutex_init(&cru->mdev_lock);218 mdev = &cru->mdev;219 mdev->dev = cru->dev;220 mdev->ops = &rzg2l_cru_media_ops;221 222 match = of_match_node(cru->dev->driver->of_match_table,223 cru->dev->of_node);224 225 strscpy(mdev->driver_name, KBUILD_MODNAME, sizeof(mdev->driver_name));226 strscpy(mdev->model, match->compatible, sizeof(mdev->model));227 228 cru->v4l2_dev.mdev = &cru->mdev;229 230 media_device_init(mdev);231 232 ret = rzg2l_cru_mc_parse_of_graph(cru);233 if (ret) {234 mutex_lock(&cru->mdev_lock);235 cru->v4l2_dev.mdev = NULL;236 mutex_unlock(&cru->mdev_lock);237 }238 239 return 0;240}241 242static int rzg2l_cru_probe(struct platform_device *pdev)243{244 struct rzg2l_cru_dev *cru;245 int ret;246 247 cru = devm_kzalloc(&pdev->dev, sizeof(*cru), GFP_KERNEL);248 if (!cru)249 return -ENOMEM;250 251 cru->base = devm_platform_ioremap_resource(pdev, 0);252 if (IS_ERR(cru->base))253 return PTR_ERR(cru->base);254 255 cru->presetn = devm_reset_control_get_shared(&pdev->dev, "presetn");256 if (IS_ERR(cru->presetn))257 return dev_err_probe(&pdev->dev, PTR_ERR(cru->presetn),258 "Failed to get cpg presetn\n");259 260 cru->aresetn = devm_reset_control_get_exclusive(&pdev->dev, "aresetn");261 if (IS_ERR(cru->aresetn))262 return dev_err_probe(&pdev->dev, PTR_ERR(cru->aresetn),263 "Failed to get cpg aresetn\n");264 265 cru->vclk = devm_clk_get(&pdev->dev, "video");266 if (IS_ERR(cru->vclk))267 return dev_err_probe(&pdev->dev, PTR_ERR(cru->vclk),268 "Failed to get video clock\n");269 270 cru->dev = &pdev->dev;271 cru->info = of_device_get_match_data(&pdev->dev);272 273 cru->image_conv_irq = platform_get_irq(pdev, 0);274 if (cru->image_conv_irq < 0)275 return cru->image_conv_irq;276 277 platform_set_drvdata(pdev, cru);278 279 ret = rzg2l_cru_dma_register(cru);280 if (ret)281 return ret;282 283 cru->num_buf = RZG2L_CRU_HW_BUFFER_DEFAULT;284 pm_suspend_ignore_children(&pdev->dev, true);285 pm_runtime_enable(&pdev->dev);286 287 ret = rzg2l_cru_media_init(cru);288 if (ret)289 goto error_dma_unregister;290 291 return 0;292 293error_dma_unregister:294 rzg2l_cru_dma_unregister(cru);295 pm_runtime_disable(&pdev->dev);296 297 return ret;298}299 300static void rzg2l_cru_remove(struct platform_device *pdev)301{302 struct rzg2l_cru_dev *cru = platform_get_drvdata(pdev);303 304 pm_runtime_disable(&pdev->dev);305 306 v4l2_async_nf_unregister(&cru->notifier);307 v4l2_async_nf_cleanup(&cru->notifier);308 309 rzg2l_cru_video_unregister(cru);310 media_device_cleanup(&cru->mdev);311 mutex_destroy(&cru->mdev_lock);312 313 rzg2l_cru_dma_unregister(cru);314}315 316static const struct of_device_id rzg2l_cru_of_id_table[] = {317 { .compatible = "renesas,rzg2l-cru", },318 { /* sentinel */ }319};320MODULE_DEVICE_TABLE(of, rzg2l_cru_of_id_table);321 322static struct platform_driver rzg2l_cru_driver = {323 .driver = {324 .name = "rzg2l-cru",325 .of_match_table = rzg2l_cru_of_id_table,326 },327 .probe = rzg2l_cru_probe,328 .remove_new = rzg2l_cru_remove,329};330 331module_platform_driver(rzg2l_cru_driver);332 333MODULE_AUTHOR("Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>");334MODULE_DESCRIPTION("Renesas RZ/G2L CRU driver");335MODULE_LICENSE("GPL");336