Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Tinghan Shen | 591 | 100.00% | 2 | 100.00% |
Total | 591 | 2 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2022 MediaTek Corporation. All rights reserved. * Author: Allen-KH Cheng <allen-kh.cheng@mediatek.com> */ #include <linux/firmware/mediatek/mtk-adsp-ipc.h> #include <linux/kernel.h> #include <linux/mailbox_client.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> static const char * const adsp_mbox_ch_names[MTK_ADSP_MBOX_NUM] = { "rx", "tx" }; /* * mtk_adsp_ipc_send - send ipc cmd to MTK ADSP * * @ipc: ADSP IPC handle * @idx: index of the mailbox channel * @msg: IPC cmd (reply or request) * * Returns zero for success from mbox_send_message * negative value for error */ int mtk_adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t msg) { struct mtk_adsp_chan *adsp_chan; int ret; if (idx >= MTK_ADSP_MBOX_NUM) return -EINVAL; adsp_chan = &ipc->chans[idx]; ret = mbox_send_message(adsp_chan->ch, &msg); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(mtk_adsp_ipc_send); /* * mtk_adsp_ipc_recv - recv callback used by MTK ADSP mailbox * * @c: mbox client * @msg: message received * * Users of ADSP IPC will need to privde handle_reply and handle_request * callbacks. */ static void mtk_adsp_ipc_recv(struct mbox_client *c, void *msg) { struct mtk_adsp_chan *chan = container_of(c, struct mtk_adsp_chan, cl); struct device *dev = c->dev; switch (chan->idx) { case MTK_ADSP_MBOX_REPLY: chan->ipc->ops->handle_reply(chan->ipc); break; case MTK_ADSP_MBOX_REQUEST: chan->ipc->ops->handle_request(chan->ipc); break; default: dev_err(dev, "wrong mbox chan %d\n", chan->idx); break; } } static int mtk_adsp_ipc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mtk_adsp_ipc *adsp_ipc; struct mtk_adsp_chan *adsp_chan; struct mbox_client *cl; int ret; int i, j; device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent); adsp_ipc = devm_kzalloc(dev, sizeof(*adsp_ipc), GFP_KERNEL); if (!adsp_ipc) return -ENOMEM; for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) { adsp_chan = &adsp_ipc->chans[i]; cl = &adsp_chan->cl; cl->dev = dev->parent; cl->tx_block = false; cl->knows_txdone = false; cl->tx_prepare = NULL; cl->rx_callback = mtk_adsp_ipc_recv; adsp_chan->ipc = adsp_ipc; adsp_chan->idx = i; adsp_chan->ch = mbox_request_channel_byname(cl, adsp_mbox_ch_names[i]); if (IS_ERR(adsp_chan->ch)) { ret = PTR_ERR(adsp_chan->ch); if (ret != -EPROBE_DEFER) dev_err(dev, "Failed to request mbox chan %s ret %d\n", adsp_mbox_ch_names[i], ret); for (j = 0; j < i; j++) { adsp_chan = &adsp_ipc->chans[j]; mbox_free_channel(adsp_chan->ch); } return ret; } } adsp_ipc->dev = dev; dev_set_drvdata(dev, adsp_ipc); dev_dbg(dev, "MTK ADSP IPC initialized\n"); return 0; } static int mtk_adsp_ipc_remove(struct platform_device *pdev) { struct mtk_adsp_ipc *adsp_ipc = dev_get_drvdata(&pdev->dev); struct mtk_adsp_chan *adsp_chan; int i; for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) { adsp_chan = &adsp_ipc->chans[i]; mbox_free_channel(adsp_chan->ch); } return 0; } static struct platform_driver mtk_adsp_ipc_driver = { .driver = { .name = "mtk-adsp-ipc", }, .probe = mtk_adsp_ipc_probe, .remove = mtk_adsp_ipc_remove, }; builtin_platform_driver(mtk_adsp_ipc_driver); MODULE_AUTHOR("Allen-KH Cheng <allen-kh.cheng@mediatek.com>"); MODULE_DESCRIPTION("MTK ADSP IPC Driver"); MODULE_LICENSE("GPL");
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