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Quellcodebibliothek Statistik Leitseite products/sources/formale Sprachen/C/Linux/drivers/net/ethernet/mellanox/mlx5/core/esw/   (Open Source Betriebssystem Version 6.17.9©)  Datei vom 24.10.2025 mit Größe 57 kB image not shown  

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imx-audio-rpmsg.c


products/sources/formale Sprachen/C/Linux/sound/soc/fsl/imx-audio-rpmsg.c

// SPDX-License-Identifier: GPL-2.0+ // Copyright 2017-2020 NXP #include #include #include "imx-pcm-rpmsg.h" /* * struct imx_audio_rpmsg: private data * * @rpmsg_pdev: pointer of platform device */ struct imx_audio_rpmsg { struct platform_device *rpmsg_pdev; struct platform_device *card_pdev; }; static int imx_audio_rpmsg_cb(struct rpmsg_device *rpdev, void *data, int len, void *priv, u32 src) { struct imx_audio_rpmsg *rpmsg = dev_get_drvdata(&rpdev->dev); struct rpmsg_r_msg *r_msg = (struct rpmsg_r_msg *)data; struct rpmsg_info *info; struct rpmsg_msg *msg; unsigned long flags; if (!rpmsg->rpmsg_pdev) return 0; info = platform_get_drvdata(rpmsg->rpmsg_pdev); dev_dbg(&rpdev->dev, "get from%d: cmd:%d. %d\n", src, r_msg->header.cmd, r_msg->param.resp); switch (r_msg->header.type) { case MSG_TYPE_C: /* TYPE C is notification from M core */ switch (r_msg->header.cmd) { case TX_PERIOD_DONE: spin_lock_irqsave(&info->lock[TX], flags); msg = &info->msg[TX_PERIOD_DONE + MSG_TYPE_A_NUM]; msg->r_msg.param.buffer_tail = r_msg->param.buffer_tail; msg->r_msg.param.buffer_tail %= info->num_period[TX]; spin_unlock_irqrestore(&info->lock[TX], flags); info->callback[TX](info->callback_param[TX]); break; case RX_PERIOD_DONE: spin_lock_irqsave(&info->lock[RX], flags); msg = &info->msg[RX_PERIOD_DONE + MSG_TYPE_A_NUM]; msg->r_msg.param.buffer_tail = r_msg->param.buffer_tail; msg->r_msg.param.buffer_tail %= info->num_period[1]; spin_unlock_irqrestore(&info->lock[RX], flags); info->callback[RX](info->callback_param[RX]); break; default: dev_warn(&rpdev->dev, "unknown msg command\n"); break; } break; case MSG_TYPE_B: /* TYPE B is response msg */ memcpy(&info->r_msg, r_msg, sizeof(struct rpmsg_r_msg)); complete(&info->cmd_complete); break; default: dev_warn(&rpdev->dev, "unknown msg type\n"); break; } return 0; } static int imx_audio_rpmsg_probe(struct rpmsg_device *rpdev) { struct imx_audio_rpmsg *data; int ret = 0; dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n", rpdev->src, rpdev->dst); data = devm_kzalloc(&rpdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; dev_set_drvdata(&rpdev->dev, data); /* Register platform driver for rpmsg routine */ data->rpmsg_pdev = platform_device_register_data(&rpdev->dev, rpdev->id.name, PLATFORM_DEVID_NONE, NULL, 0); if (IS_ERR(data->rpmsg_pdev)) { dev_err(&rpdev->dev, "failed to register rpmsg platform.\n"); ret = PTR_ERR(data->rpmsg_pdev); } data->card_pdev = platform_device_register_data(&rpdev->dev, "imx-audio-rpmsg", PLATFORM_DEVID_AUTO, rpdev->id.name, strlen(rpdev->id.name) + 1); if (IS_ERR(data->card_pdev)) { dev_err(&rpdev->dev, "failed to register rpmsg card.\n"); ret = PTR_ERR(data->card_pdev); } return ret; } static void imx_audio_rpmsg_remove(struct rpmsg_device *rpdev) { struct imx_audio_rpmsg *data = dev_get_drvdata(&rpdev->dev); if (data->rpmsg_pdev) platform_device_unregister(data->rpmsg_pdev); if (data->card_pdev) platform_device_unregister(data->card_pdev); dev_info(&rpdev->dev, "audio rpmsg driver is removed\n"); } static struct rpmsg_device_id imx_audio_rpmsg_id_table[] = { { .name = "rpmsg-audio-channel" }, { .name = "rpmsg-micfil-channel" }, { }, }; MODULE_DEVICE_TABLE(rpmsg, imx_audio_rpmsg_id_table); static struct rpmsg_driver imx_audio_rpmsg_driver = { .drv.name = "imx_audio_rpmsg", .id_table = imx_audio_rpmsg_id_table, .probe = imx_audio_rpmsg_probe, .callback = imx_audio_rpmsg_cb, .remove = imx_audio_rpmsg_remove, }; module_rpmsg_driver(imx_audio_rpmsg_driver); MODULE_DESCRIPTION("Freescale SoC Audio RPMSG interface"); MODULE_AUTHOR("Shengjiu Wang "); MODULE_ALIAS("rpmsg:imx_audio_rpmsg"); MODULE_LICENSE("GPL v2");

                                                                                                                                                                                                                                                                                                                                                                                                     

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