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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | // SPDX-License-Identifier: GPL-2.0+ // Copyright 2017-2020 NXP #include <linux/module.h> #include <linux/rpmsg.h> #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; }; 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, IMX_PCM_DRV_NAME, PLATFORM_DEVID_AUTO, NULL, 0); if (IS_ERR(data->rpmsg_pdev)) { dev_err(&rpdev->dev, "failed to register rpmsg platform.\n"); ret = PTR_ERR(data->rpmsg_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); 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" }, { }, }; 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 <shengjiu.wang@nxp.com>"); MODULE_ALIAS("platform:imx_audio_rpmsg"); MODULE_LICENSE("GPL v2"); |